From 654d364e26c797e8a5f9e2a1393607e6ca0106eb Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 Sep 2009 14:04:06 +0900
Subject: [PATCH 001/137] sh: sh4_flush_cache_mm() optimizations.
The i-cache flush in the case of VM_EXEC was added way back when as a
sanity measure, and in practice we only care about evicting aliases from
the d-cache. As a result, it's possible to drop the i-cache flush
completely here.
After careful profiling it's also come up that all of the work associated
with hunting down aliases and doing ranged flushing ends up generating
more overhead than simply blasting away the entire dcache, particularly
if there are many mm's that need to be iterated over. As a result of
that, just move back to flush_dcache_all() in these cases, which restores
the old behaviour, and vastly simplifies the path.
Additionally, on platforms without aliases at all, this can simply be
nopped out. Presently we have the alias check in the SH-4 specific
version, but this is true for all of the platforms, so move the check up
to a generic location. This cuts down quite a bit on superfluous cacheop
IPIs.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/cache-sh4.c | 124 ++---------------------------------------
arch/sh/mm/cache.c | 6 ++
2 files changed, 10 insertions(+), 120 deletions(-)
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index b2453bbef4cd..a5c339bca8aa 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -170,89 +170,13 @@ static void sh4_flush_cache_all(void *unused)
flush_icache_all();
}
-static void __flush_cache_mm(struct mm_struct *mm, unsigned long start,
- unsigned long end)
-{
- unsigned long d = 0, p = start & PAGE_MASK;
- unsigned long alias_mask = boot_cpu_data.dcache.alias_mask;
- unsigned long n_aliases = boot_cpu_data.dcache.n_aliases;
- unsigned long select_bit;
- unsigned long all_aliases_mask;
- unsigned long addr_offset;
- pgd_t *dir;
- pmd_t *pmd;
- pud_t *pud;
- pte_t *pte;
- int i;
-
- dir = pgd_offset(mm, p);
- pud = pud_offset(dir, p);
- pmd = pmd_offset(pud, p);
- end = PAGE_ALIGN(end);
-
- all_aliases_mask = (1 << n_aliases) - 1;
-
- do {
- if (pmd_none(*pmd) || unlikely(pmd_bad(*pmd))) {
- p &= PMD_MASK;
- p += PMD_SIZE;
- pmd++;
-
- continue;
- }
-
- pte = pte_offset_kernel(pmd, p);
-
- do {
- unsigned long phys;
- pte_t entry = *pte;
-
- if (!(pte_val(entry) & _PAGE_PRESENT)) {
- pte++;
- p += PAGE_SIZE;
- continue;
- }
-
- phys = pte_val(entry) & PTE_PHYS_MASK;
-
- if ((p ^ phys) & alias_mask) {
- d |= 1 << ((p & alias_mask) >> PAGE_SHIFT);
- d |= 1 << ((phys & alias_mask) >> PAGE_SHIFT);
-
- if (d == all_aliases_mask)
- goto loop_exit;
- }
-
- pte++;
- p += PAGE_SIZE;
- } while (p < end && ((unsigned long)pte & ~PAGE_MASK));
- pmd++;
- } while (p < end);
-
-loop_exit:
- addr_offset = 0;
- select_bit = 1;
-
- for (i = 0; i < n_aliases; i++) {
- if (d & select_bit) {
- (*__flush_dcache_segment_fn)(addr_offset, PAGE_SIZE);
- wmb();
- }
-
- select_bit <<= 1;
- addr_offset += PAGE_SIZE;
- }
-}
-
/*
* Note : (RPC) since the caches are physically tagged, the only point
* of flush_cache_mm for SH-4 is to get rid of aliases from the
* D-cache. The assumption elsewhere, e.g. flush_cache_range, is that
* lines can stay resident so long as the virtual address they were
* accessed with (hence cache set) is in accord with the physical
- * address (i.e. tag). It's no different here. So I reckon we don't
- * need to flush the I-cache, since aliases don't matter for that. We
- * should try that.
+ * address (i.e. tag). It's no different here.
*
* Caller takes mm->mmap_sem.
*/
@@ -263,33 +187,7 @@ static void sh4_flush_cache_mm(void *arg)
if (cpu_context(smp_processor_id(), mm) == NO_CONTEXT)
return;
- /*
- * If cache is only 4k-per-way, there are never any 'aliases'. Since
- * the cache is physically tagged, the data can just be left in there.
- */
- if (boot_cpu_data.dcache.n_aliases == 0)
- return;
-
- /*
- * Don't bother groveling around the dcache for the VMA ranges
- * if there are too many PTEs to make it worthwhile.
- */
- if (mm->nr_ptes >= MAX_DCACHE_PAGES)
- flush_dcache_all();
- else {
- struct vm_area_struct *vma;
-
- /*
- * In this case there are reasonably sized ranges to flush,
- * iterate through the VMA list and take care of any aliases.
- */
- for (vma = mm->mmap; vma; vma = vma->vm_next)
- __flush_cache_mm(mm, vma->vm_start, vma->vm_end);
- }
-
- /* Only touch the icache if one of the VMAs has VM_EXEC set. */
- if (mm->exec_vm)
- flush_icache_all();
+ flush_dcache_all();
}
/*
@@ -372,24 +270,10 @@ static void sh4_flush_cache_range(void *args)
if (boot_cpu_data.dcache.n_aliases == 0)
return;
- /*
- * Don't bother with the lookup and alias check if we have a
- * wide range to cover, just blow away the dcache in its
- * entirety instead. -- PFM.
- */
- if (((end - start) >> PAGE_SHIFT) >= MAX_DCACHE_PAGES)
- flush_dcache_all();
- else
- __flush_cache_mm(vma->vm_mm, start, end);
+ flush_dcache_all();
- if (vma->vm_flags & VM_EXEC) {
- /*
- * TODO: Is this required??? Need to look at how I-cache
- * coherency is assured when new programs are loaded to see if
- * this matters.
- */
+ if (vma->vm_flags & VM_EXEC)
flush_icache_all();
- }
}
/**
diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c
index 35c37b7f717a..4aa926054531 100644
--- a/arch/sh/mm/cache.c
+++ b/arch/sh/mm/cache.c
@@ -164,11 +164,17 @@ void flush_cache_all(void)
void flush_cache_mm(struct mm_struct *mm)
{
+ if (boot_cpu_data.dcache.n_aliases == 0)
+ return;
+
cacheop_on_each_cpu(local_flush_cache_mm, mm, 1);
}
void flush_cache_dup_mm(struct mm_struct *mm)
{
+ if (boot_cpu_data.dcache.n_aliases == 0)
+ return;
+
cacheop_on_each_cpu(local_flush_cache_dup_mm, mm, 1);
}
From 31c9efde786252112cc3d04a1ed3513b6ec63a7b Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 Sep 2009 14:10:28 +0900
Subject: [PATCH 002/137] sh: Kill off broken PHYSADDR() usage in
sh4_flush_dcache_page().
PHYSADDR() runs in to issues in 32-bit mode when we do not have the
legacy P1/P2 areas mapped, as such, we need to use page_to_phys()
directly, which also happens to do the right thing in legacy 29-bit mode.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/cache-sh4.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index a5c339bca8aa..f0999606686f 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -123,12 +123,12 @@ static void sh4_flush_dcache_page(void *arg)
else
#endif
{
- unsigned long phys = PHYSADDR(page_address(page));
+ unsigned long phys = page_to_phys(page);
unsigned long addr = CACHE_OC_ADDRESS_ARRAY;
int i, n;
/* Loop all the D-cache */
- n = boot_cpu_data.dcache.n_aliases;
+ n = boot_cpu_data.dcache.way_incr >> 12;
for (i = 0; i < n; i++, addr += 4096)
flush_cache_4096(addr, phys);
}
From bd6df57481b329dfeeb4889068848ee4f4761561 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 Sep 2009 14:22:15 +0900
Subject: [PATCH 003/137] sh: Kill off segment-based d-cache flushing on SH-4.
This kills off the unrolled segment based flushers on SH-4 and switches
over to a generic unrolled approach derived from the writethrough segment
flusher.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/cache-sh4.c | 291 +++--------------------------------------
1 file changed, 20 insertions(+), 271 deletions(-)
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index f0999606686f..92b7d947db94 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -29,14 +29,6 @@
static void __flush_cache_4096(unsigned long addr, unsigned long phys,
unsigned long exec_offset);
-/*
- * This is initialised here to ensure that it is not placed in the BSS. If
- * that were to happen, note that cache_init gets called before the BSS is
- * cleared, so this would get nulled out which would be hopeless.
- */
-static void (*__flush_dcache_segment_fn)(unsigned long, unsigned long) =
- (void (*)(unsigned long, unsigned long))0xdeadbeef;
-
/*
* Write back the range of D-cache, and purge the I-cache.
*
@@ -158,10 +150,27 @@ static void __uses_jump_to_uncached flush_icache_all(void)
local_irq_restore(flags);
}
-static inline void flush_dcache_all(void)
+static void flush_dcache_all(void)
{
- (*__flush_dcache_segment_fn)(0UL, boot_cpu_data.dcache.way_size);
- wmb();
+ unsigned long addr, end_addr, entry_offset;
+
+ end_addr = CACHE_OC_ADDRESS_ARRAY +
+ (current_cpu_data.dcache.sets <<
+ current_cpu_data.dcache.entry_shift) *
+ current_cpu_data.dcache.ways;
+
+ entry_offset = 1 << current_cpu_data.dcache.entry_shift;
+
+ for (addr = CACHE_OC_ADDRESS_ARRAY; addr < end_addr; ) {
+ __raw_writel(0, addr); addr += entry_offset;
+ __raw_writel(0, addr); addr += entry_offset;
+ __raw_writel(0, addr); addr += entry_offset;
+ __raw_writel(0, addr); addr += entry_offset;
+ __raw_writel(0, addr); addr += entry_offset;
+ __raw_writel(0, addr); addr += entry_offset;
+ __raw_writel(0, addr); addr += entry_offset;
+ __raw_writel(0, addr); addr += entry_offset;
+ }
}
static void sh4_flush_cache_all(void *unused)
@@ -347,245 +356,6 @@ static void __flush_cache_4096(unsigned long addr, unsigned long phys,
} while (--way_count != 0);
}
-/*
- * Break the 1, 2 and 4 way variants of this out into separate functions to
- * avoid nearly all the overhead of having the conditional stuff in the function
- * bodies (+ the 1 and 2 way cases avoid saving any registers too).
- *
- * We want to eliminate unnecessary bus transactions, so this code uses
- * a non-obvious technique.
- *
- * Loop over a cache way sized block of, one cache line at a time. For each
- * line, use movca.a to cause the current cache line contents to be written
- * back, but without reading anything from main memory. However this has the
- * side effect that the cache is now caching that memory location. So follow
- * this with a cache invalidate to mark the cache line invalid. And do all
- * this with interrupts disabled, to avoid the cache line being accidently
- * evicted while it is holding garbage.
- *
- * This also breaks in a number of circumstances:
- * - if there are modifications to the region of memory just above
- * empty_zero_page (for example because a breakpoint has been placed
- * there), then these can be lost.
- *
- * This is because the the memory address which the cache temporarily
- * caches in the above description is empty_zero_page. So the
- * movca.l hits the cache (it is assumed that it misses, or at least
- * isn't dirty), modifies the line and then invalidates it, losing the
- * required change.
- *
- * - If caches are disabled or configured in write-through mode, then
- * the movca.l writes garbage directly into memory.
- */
-static void __flush_dcache_segment_writethrough(unsigned long start,
- unsigned long extent_per_way)
-{
- unsigned long addr;
- int i;
-
- addr = CACHE_OC_ADDRESS_ARRAY | (start & cpu_data->dcache.entry_mask);
-
- while (extent_per_way) {
- for (i = 0; i < cpu_data->dcache.ways; i++)
- __raw_writel(0, addr + cpu_data->dcache.way_incr * i);
-
- addr += cpu_data->dcache.linesz;
- extent_per_way -= cpu_data->dcache.linesz;
- }
-}
-
-static void __flush_dcache_segment_1way(unsigned long start,
- unsigned long extent_per_way)
-{
- unsigned long orig_sr, sr_with_bl;
- unsigned long base_addr;
- unsigned long way_incr, linesz, way_size;
- struct cache_info *dcache;
- register unsigned long a0, a0e;
-
- asm volatile("stc sr, %0" : "=r" (orig_sr));
- sr_with_bl = orig_sr | (1<<28);
- base_addr = ((unsigned long)&empty_zero_page[0]);
-
- /*
- * The previous code aligned base_addr to 16k, i.e. the way_size of all
- * existing SH-4 D-caches. Whilst I don't see a need to have this
- * aligned to any better than the cache line size (which it will be
- * anyway by construction), let's align it to at least the way_size of
- * any existing or conceivable SH-4 D-cache. -- RPC
- */
- base_addr = ((base_addr >> 16) << 16);
- base_addr |= start;
-
- dcache = &boot_cpu_data.dcache;
- linesz = dcache->linesz;
- way_incr = dcache->way_incr;
- way_size = dcache->way_size;
-
- a0 = base_addr;
- a0e = base_addr + extent_per_way;
- do {
- asm volatile("ldc %0, sr" : : "r" (sr_with_bl));
- asm volatile("movca.l r0, @%0\n\t"
- "ocbi @%0" : : "r" (a0));
- a0 += linesz;
- asm volatile("movca.l r0, @%0\n\t"
- "ocbi @%0" : : "r" (a0));
- a0 += linesz;
- asm volatile("movca.l r0, @%0\n\t"
- "ocbi @%0" : : "r" (a0));
- a0 += linesz;
- asm volatile("movca.l r0, @%0\n\t"
- "ocbi @%0" : : "r" (a0));
- asm volatile("ldc %0, sr" : : "r" (orig_sr));
- a0 += linesz;
- } while (a0 < a0e);
-}
-
-static void __flush_dcache_segment_2way(unsigned long start,
- unsigned long extent_per_way)
-{
- unsigned long orig_sr, sr_with_bl;
- unsigned long base_addr;
- unsigned long way_incr, linesz, way_size;
- struct cache_info *dcache;
- register unsigned long a0, a1, a0e;
-
- asm volatile("stc sr, %0" : "=r" (orig_sr));
- sr_with_bl = orig_sr | (1<<28);
- base_addr = ((unsigned long)&empty_zero_page[0]);
-
- /* See comment under 1-way above */
- base_addr = ((base_addr >> 16) << 16);
- base_addr |= start;
-
- dcache = &boot_cpu_data.dcache;
- linesz = dcache->linesz;
- way_incr = dcache->way_incr;
- way_size = dcache->way_size;
-
- a0 = base_addr;
- a1 = a0 + way_incr;
- a0e = base_addr + extent_per_way;
- do {
- asm volatile("ldc %0, sr" : : "r" (sr_with_bl));
- asm volatile("movca.l r0, @%0\n\t"
- "movca.l r0, @%1\n\t"
- "ocbi @%0\n\t"
- "ocbi @%1" : :
- "r" (a0), "r" (a1));
- a0 += linesz;
- a1 += linesz;
- asm volatile("movca.l r0, @%0\n\t"
- "movca.l r0, @%1\n\t"
- "ocbi @%0\n\t"
- "ocbi @%1" : :
- "r" (a0), "r" (a1));
- a0 += linesz;
- a1 += linesz;
- asm volatile("movca.l r0, @%0\n\t"
- "movca.l r0, @%1\n\t"
- "ocbi @%0\n\t"
- "ocbi @%1" : :
- "r" (a0), "r" (a1));
- a0 += linesz;
- a1 += linesz;
- asm volatile("movca.l r0, @%0\n\t"
- "movca.l r0, @%1\n\t"
- "ocbi @%0\n\t"
- "ocbi @%1" : :
- "r" (a0), "r" (a1));
- asm volatile("ldc %0, sr" : : "r" (orig_sr));
- a0 += linesz;
- a1 += linesz;
- } while (a0 < a0e);
-}
-
-static void __flush_dcache_segment_4way(unsigned long start,
- unsigned long extent_per_way)
-{
- unsigned long orig_sr, sr_with_bl;
- unsigned long base_addr;
- unsigned long way_incr, linesz, way_size;
- struct cache_info *dcache;
- register unsigned long a0, a1, a2, a3, a0e;
-
- asm volatile("stc sr, %0" : "=r" (orig_sr));
- sr_with_bl = orig_sr | (1<<28);
- base_addr = ((unsigned long)&empty_zero_page[0]);
-
- /* See comment under 1-way above */
- base_addr = ((base_addr >> 16) << 16);
- base_addr |= start;
-
- dcache = &boot_cpu_data.dcache;
- linesz = dcache->linesz;
- way_incr = dcache->way_incr;
- way_size = dcache->way_size;
-
- a0 = base_addr;
- a1 = a0 + way_incr;
- a2 = a1 + way_incr;
- a3 = a2 + way_incr;
- a0e = base_addr + extent_per_way;
- do {
- asm volatile("ldc %0, sr" : : "r" (sr_with_bl));
- asm volatile("movca.l r0, @%0\n\t"
- "movca.l r0, @%1\n\t"
- "movca.l r0, @%2\n\t"
- "movca.l r0, @%3\n\t"
- "ocbi @%0\n\t"
- "ocbi @%1\n\t"
- "ocbi @%2\n\t"
- "ocbi @%3\n\t" : :
- "r" (a0), "r" (a1), "r" (a2), "r" (a3));
- a0 += linesz;
- a1 += linesz;
- a2 += linesz;
- a3 += linesz;
- asm volatile("movca.l r0, @%0\n\t"
- "movca.l r0, @%1\n\t"
- "movca.l r0, @%2\n\t"
- "movca.l r0, @%3\n\t"
- "ocbi @%0\n\t"
- "ocbi @%1\n\t"
- "ocbi @%2\n\t"
- "ocbi @%3\n\t" : :
- "r" (a0), "r" (a1), "r" (a2), "r" (a3));
- a0 += linesz;
- a1 += linesz;
- a2 += linesz;
- a3 += linesz;
- asm volatile("movca.l r0, @%0\n\t"
- "movca.l r0, @%1\n\t"
- "movca.l r0, @%2\n\t"
- "movca.l r0, @%3\n\t"
- "ocbi @%0\n\t"
- "ocbi @%1\n\t"
- "ocbi @%2\n\t"
- "ocbi @%3\n\t" : :
- "r" (a0), "r" (a1), "r" (a2), "r" (a3));
- a0 += linesz;
- a1 += linesz;
- a2 += linesz;
- a3 += linesz;
- asm volatile("movca.l r0, @%0\n\t"
- "movca.l r0, @%1\n\t"
- "movca.l r0, @%2\n\t"
- "movca.l r0, @%3\n\t"
- "ocbi @%0\n\t"
- "ocbi @%1\n\t"
- "ocbi @%2\n\t"
- "ocbi @%3\n\t" : :
- "r" (a0), "r" (a1), "r" (a2), "r" (a3));
- asm volatile("ldc %0, sr" : : "r" (orig_sr));
- a0 += linesz;
- a1 += linesz;
- a2 += linesz;
- a3 += linesz;
- } while (a0 < a0e);
-}
-
extern void __weak sh4__flush_region_init(void);
/*
@@ -593,32 +363,11 @@ extern void __weak sh4__flush_region_init(void);
*/
void __init sh4_cache_init(void)
{
- unsigned int wt_enabled = !!(__raw_readl(CCR) & CCR_CACHE_WT);
-
printk("PVR=%08x CVR=%08x PRR=%08x\n",
ctrl_inl(CCN_PVR),
ctrl_inl(CCN_CVR),
ctrl_inl(CCN_PRR));
- if (wt_enabled)
- __flush_dcache_segment_fn = __flush_dcache_segment_writethrough;
- else {
- switch (boot_cpu_data.dcache.ways) {
- case 1:
- __flush_dcache_segment_fn = __flush_dcache_segment_1way;
- break;
- case 2:
- __flush_dcache_segment_fn = __flush_dcache_segment_2way;
- break;
- case 4:
- __flush_dcache_segment_fn = __flush_dcache_segment_4way;
- break;
- default:
- panic("unknown number of cache ways\n");
- break;
- }
- }
-
local_flush_icache_range = sh4_flush_icache_range;
local_flush_dcache_page = sh4_flush_dcache_page;
local_flush_cache_all = sh4_flush_cache_all;
From deaef20e9789d93c06d2d3b5ffc99939814802ca Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 Sep 2009 16:06:39 +0900
Subject: [PATCH 004/137] sh: Rework sh4_flush_cache_page() for coherent kmap
mapping.
This builds on top of the MIPS r4k code that does roughly the same thing.
This permits the use of kmap_coherent() for mapped pages with dirty
dcache lines and falls back on kmap_atomic() otherwise.
This also fixes up a problem with the alias check and defers to
shm_align_mask directly.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/cache-sh4.c | 75 +++++++++++++++++++++++++++---------------
1 file changed, 48 insertions(+), 27 deletions(-)
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 92b7d947db94..e3fbd99b323c 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -2,7 +2,7 @@
* arch/sh/mm/cache-sh4.c
*
* Copyright (C) 1999, 2000, 2002 Niibe Yutaka
- * Copyright (C) 2001 - 2007 Paul Mundt
+ * Copyright (C) 2001 - 2009 Paul Mundt
* Copyright (C) 2003 Richard Curnow
* Copyright (c) 2007 STMicroelectronics (R&D) Ltd.
*
@@ -15,6 +15,8 @@
#include <linux/io.h>
#include <linux/mutex.h>
#include <linux/fs.h>
+#include <linux/highmem.h>
+#include <asm/pgtable.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
@@ -23,7 +25,6 @@
* flushing. Anything exceeding this will simply flush the dcache in its
* entirety.
*/
-#define MAX_DCACHE_PAGES 64 /* XXX: Tune for ways */
#define MAX_ICACHE_PAGES 32
static void __flush_cache_4096(unsigned long addr, unsigned long phys,
@@ -209,44 +210,64 @@ static void sh4_flush_cache_page(void *args)
{
struct flusher_data *data = args;
struct vm_area_struct *vma;
+ struct page *page;
unsigned long address, pfn, phys;
- unsigned int alias_mask;
+ int map_coherent = 0;
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+ void *vaddr;
vma = data->vma;
address = data->addr1;
pfn = data->addr2;
phys = pfn << PAGE_SHIFT;
+ page = pfn_to_page(pfn);
if (cpu_context(smp_processor_id(), vma->vm_mm) == NO_CONTEXT)
return;
- alias_mask = boot_cpu_data.dcache.alias_mask;
+ address &= PAGE_MASK;
+ pgd = pgd_offset(vma->vm_mm, address);
+ pud = pud_offset(pgd, address);
+ pmd = pmd_offset(pud, address);
+ pte = pte_offset_kernel(pmd, address);
- /* We only need to flush D-cache when we have alias */
- if ((address^phys) & alias_mask) {
- /* Loop 4K of the D-cache */
- flush_cache_4096(
- CACHE_OC_ADDRESS_ARRAY | (address & alias_mask),
- phys);
- /* Loop another 4K of the D-cache */
- flush_cache_4096(
- CACHE_OC_ADDRESS_ARRAY | (phys & alias_mask),
- phys);
+ /* If the page isn't present, there is nothing to do here. */
+ if (!(pte_val(*pte) & _PAGE_PRESENT))
+ return;
+
+ if ((vma->vm_mm == current->active_mm))
+ vaddr = NULL;
+ else {
+ /*
+ * Use kmap_coherent or kmap_atomic to do flushes for
+ * another ASID than the current one.
+ */
+ map_coherent = (current_cpu_data.dcache.n_aliases &&
+ !test_bit(PG_dcache_dirty, &page->flags) &&
+ page_mapped(page));
+ if (map_coherent)
+ vaddr = kmap_coherent(page, address);
+ else
+ vaddr = kmap_atomic(page, KM_USER0);
+
+ address = (unsigned long)vaddr;
}
- alias_mask = boot_cpu_data.icache.alias_mask;
- if (vma->vm_flags & VM_EXEC) {
- /*
- * Evict entries from the portion of the cache from which code
- * may have been executed at this address (virtual). There's
- * no need to evict from the portion corresponding to the
- * physical address as for the D-cache, because we know the
- * kernel has never executed the code through its identity
- * translation.
- */
- flush_cache_4096(
- CACHE_IC_ADDRESS_ARRAY | (address & alias_mask),
- phys);
+ if (pages_do_alias(address, phys))
+ flush_cache_4096(CACHE_OC_ADDRESS_ARRAY |
+ (address & shm_align_mask), phys);
+
+ if (vma->vm_flags & VM_EXEC)
+ flush_icache_all();
+
+ if (vaddr) {
+ if (map_coherent)
+ kunmap_coherent(vaddr);
+ else
+ kunmap_atomic(vaddr, KM_USER0);
}
}
From c4845a4b2288a9e5d96a0558e474809028c8aff3 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 Sep 2009 17:13:07 +0900
Subject: [PATCH 005/137] sh: Fix up redundant cache flushing for PAGE_SIZE >
4k.
If PAGE_SIZE is presently over 4k we do a lot of extra flushing given
that we purge the cache 4k at a time. Make it explicitly 4k per
iteration, rather than iterating for PAGE_SIZE before looping over again.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/cache-sh4.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index e3fbd99b323c..8362d312ad94 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -357,7 +357,7 @@ static void __flush_cache_4096(unsigned long addr, unsigned long phys,
* pointless nead-of-loop check for 0 iterations.
*/
do {
- ea = base_addr + PAGE_SIZE;
+ ea = base_addr + 4096;
a = base_addr;
p = phys;
From f9e2bdfdbb4c9da13422b349227be8c7b41dbd44 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 Sep 2009 17:14:19 +0900
Subject: [PATCH 006/137] sh: Factor in cpu id for selection of cache colour
fixmap.
In the SMP VIPT case the page copy/clear ops still perform colouring,
care needs to be taken that CPUs don't end up stepping on each other,
so we give them a bit of room to work with.
At the same time, we reduce the worst-case colouring given that these
pages are always consumed.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/fixmap.h | 6 +++---
arch/sh/mm/kmap.c | 4 +++-
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/sh/include/asm/fixmap.h b/arch/sh/include/asm/fixmap.h
index 721fcc4d5e98..76c5a3099cb8 100644
--- a/arch/sh/include/asm/fixmap.h
+++ b/arch/sh/include/asm/fixmap.h
@@ -14,9 +14,9 @@
#define _ASM_FIXMAP_H
#include <linux/kernel.h>
+#include <linux/threads.h>
#include <asm/page.h>
#ifdef CONFIG_HIGHMEM
-#include <linux/threads.h>
#include <asm/kmap_types.h>
#endif
@@ -46,9 +46,9 @@
* fix-mapped?
*/
enum fixed_addresses {
-#define FIX_N_COLOURS 16
+#define FIX_N_COLOURS 8
FIX_CMAP_BEGIN,
- FIX_CMAP_END = FIX_CMAP_BEGIN + FIX_N_COLOURS,
+ FIX_CMAP_END = FIX_CMAP_BEGIN + (FIX_N_COLOURS * NR_CPUS),
FIX_UNCACHED,
#ifdef CONFIG_HIGHMEM
FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
diff --git a/arch/sh/mm/kmap.c b/arch/sh/mm/kmap.c
index 16e01b5fed04..15d74ea42094 100644
--- a/arch/sh/mm/kmap.c
+++ b/arch/sh/mm/kmap.c
@@ -39,7 +39,9 @@ void *kmap_coherent(struct page *page, unsigned long addr)
pagefault_disable();
idx = FIX_CMAP_END -
- ((addr & current_cpu_data.dcache.alias_mask) >> PAGE_SHIFT);
+ (((addr >> PAGE_SHIFT) & (FIX_N_COLOURS - 1)) +
+ (FIX_N_COLOURS * smp_processor_id()));
+
vaddr = __fix_to_virt(idx);
BUG_ON(!pte_none(*(kmap_coherent_pte - idx)));
From a469f627c15de2af392be23508e6094d7268e2b7 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Sat, 3 Oct 2009 11:21:30 +0000
Subject: [PATCH 007/137] SH: add support for the RJ54N1CB0C camera for the
kfr2r09 platform
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-kfr2r09/setup.c | 139 ++++++++++++++++++++++++++++
1 file changed, 139 insertions(+)
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index c08d33fe2104..ce01d6a953b8 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -18,6 +18,8 @@
#include <linux/input.h>
#include <linux/i2c.h>
#include <linux/usb/r8a66597.h>
+#include <media/soc_camera.h>
+#include <media/sh_mobile_ceu.h>
#include <video/sh_mobile_lcdc.h>
#include <asm/clock.h>
#include <asm/machvec.h>
@@ -212,11 +214,131 @@ static struct platform_device kfr2r09_usb0_gadget_device = {
.resource = kfr2r09_usb0_gadget_resources,
};
+static struct sh_mobile_ceu_info sh_mobile_ceu_info = {
+ .flags = SH_CEU_FLAG_USE_8BIT_BUS,
+};
+
+static struct resource kfr2r09_ceu_resources[] = {
+ [0] = {
+ .name = "CEU",
+ .start = 0xfe910000,
+ .end = 0xfe91009f,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 52,
+ .end = 52,
+ .flags = IORESOURCE_IRQ,
+ },
+ [2] = {
+ /* place holder for contiguous memory */
+ },
+};
+
+static struct platform_device kfr2r09_ceu_device = {
+ .name = "sh_mobile_ceu",
+ .id = 0, /* "ceu0" clock */
+ .num_resources = ARRAY_SIZE(kfr2r09_ceu_resources),
+ .resource = kfr2r09_ceu_resources,
+ .dev = {
+ .platform_data = &sh_mobile_ceu_info,
+ },
+ .archdata = {
+ .hwblk_id = HWBLK_CEU0,
+ },
+};
+
+static struct i2c_board_info kfr2r09_i2c_camera = {
+ I2C_BOARD_INFO("rj54n1cb0c", 0x50),
+};
+
+static struct clk *camera_clk;
+
+#define DRVCRB 0xA405018C
+static int camera_power(struct device *dev, int mode)
+{
+ int ret;
+
+ if (mode) {
+ long rate;
+
+ camera_clk = clk_get(NULL, "video_clk");
+ if (IS_ERR(camera_clk))
+ return PTR_ERR(camera_clk);
+
+ /* set VIO_CKO clock to 25MHz */
+ rate = clk_round_rate(camera_clk, 25000000);
+ ret = clk_set_rate(camera_clk, rate);
+ if (ret < 0)
+ goto eclkrate;
+
+ /* set DRVCRB
+ *
+ * use 1.8 V for VccQ_VIO
+ * use 2.85V for VccQ_SR
+ */
+ ctrl_outw((ctrl_inw(DRVCRB) & ~0x0003) | 0x0001, DRVCRB);
+
+ /* reset clear */
+ ret = gpio_request(GPIO_PTB4, NULL);
+ if (ret < 0)
+ goto eptb4;
+ ret = gpio_request(GPIO_PTB7, NULL);
+ if (ret < 0)
+ goto eptb7;
+
+ ret = gpio_direction_output(GPIO_PTB4, 1);
+ if (!ret)
+ ret = gpio_direction_output(GPIO_PTB7, 1);
+ if (ret < 0)
+ goto egpioout;
+ msleep(1);
+
+ ret = clk_enable(camera_clk); /* start VIO_CKO */
+ if (ret < 0)
+ goto eclkon;
+
+ return 0;
+ }
+
+ ret = 0;
+
+ clk_disable(camera_clk);
+eclkon:
+ gpio_set_value(GPIO_PTB7, 0);
+egpioout:
+ gpio_set_value(GPIO_PTB4, 0);
+ gpio_free(GPIO_PTB7);
+eptb7:
+ gpio_free(GPIO_PTB4);
+eptb4:
+eclkrate:
+ clk_put(camera_clk);
+ return ret;
+}
+
+static struct soc_camera_link rj54n1_link = {
+ .power = camera_power,
+ .board_info = &kfr2r09_i2c_camera,
+ .i2c_adapter_id = 1,
+ .module_name = "rj54n1cb0c",
+};
+
+static struct platform_device kfr2r09_camera = {
+ .name = "soc-camera-pdrv",
+ .id = 0,
+ .dev = {
+ .platform_data = &rj54n1_link,
+ },
+};
+
static struct platform_device *kfr2r09_devices[] __initdata = {
&kfr2r09_nor_flash_device,
&kfr2r09_nand_flash_device,
&kfr2r09_sh_keysc_device,
&kfr2r09_sh_lcdc_device,
+ &kfr2r09_ceu_device,
+ &kfr2r09_camera,
};
#define BSC_CS0BCR 0xfec10004
@@ -361,6 +483,23 @@ static int __init kfr2r09_devices_setup(void)
if (kfr2r09_usb0_gadget_setup() == 0)
platform_device_register(&kfr2r09_usb0_gadget_device);
+ /* CEU */
+ gpio_request(GPIO_FN_VIO_CKO, NULL);
+ gpio_request(GPIO_FN_VIO0_CLK, NULL);
+ gpio_request(GPIO_FN_VIO0_VD, NULL);
+ gpio_request(GPIO_FN_VIO0_HD, NULL);
+ gpio_request(GPIO_FN_VIO0_FLD, NULL);
+ gpio_request(GPIO_FN_VIO0_D7, NULL);
+ gpio_request(GPIO_FN_VIO0_D6, NULL);
+ gpio_request(GPIO_FN_VIO0_D5, NULL);
+ gpio_request(GPIO_FN_VIO0_D4, NULL);
+ gpio_request(GPIO_FN_VIO0_D3, NULL);
+ gpio_request(GPIO_FN_VIO0_D2, NULL);
+ gpio_request(GPIO_FN_VIO0_D1, NULL);
+ gpio_request(GPIO_FN_VIO0_D0, NULL);
+
+ platform_resource_setup_memory(&kfr2r09_ceu_device, "ceu", 4 << 20);
+
return platform_add_devices(kfr2r09_devices,
ARRAY_SIZE(kfr2r09_devices));
}
From 067784f6239e08a084b4d8d597e14435331eae51 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Tue, 6 Oct 2009 21:22:23 +0000
Subject: [PATCH 008/137] sh: Allocate PMB entry slot earlier
Simplify set_pmb_entry() by removing the possibility of not finding a
free slot in the PMB. Instead we now allocate a slot in pmb_alloc() so
that if there are no free slots we fail at allocation time, rather than
in set_pmb_entry().
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/pmb.c | 80 +++++++++++++++++++++++-------------------------
1 file changed, 39 insertions(+), 41 deletions(-)
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index aade31102112..b8a33949296a 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -99,10 +99,31 @@ static inline void pmb_list_del(struct pmb_entry *pmbe)
}
}
+static int pmb_alloc_entry(void)
+{
+ unsigned int pos;
+
+repeat:
+ pos = find_first_zero_bit(&pmb_map, NR_PMB_ENTRIES);
+
+ if (unlikely(pos > NR_PMB_ENTRIES))
+ return -ENOSPC;
+
+ if (test_and_set_bit(pos, &pmb_map))
+ goto repeat;
+
+ return pos;
+}
+
struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
unsigned long flags)
{
struct pmb_entry *pmbe;
+ int pos;
+
+ pos = pmb_alloc_entry();
+ if (pos < 0)
+ return ERR_PTR(pos);
pmbe = kmem_cache_alloc(pmb_cache, GFP_KERNEL);
if (!pmbe)
@@ -111,6 +132,7 @@ struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
pmbe->vpn = vpn;
pmbe->ppn = ppn;
pmbe->flags = flags;
+ pmbe->entry = pos;
spin_lock_irq(&pmb_list_lock);
pmb_list_add(pmbe);
@@ -131,23 +153,9 @@ void pmb_free(struct pmb_entry *pmbe)
/*
* Must be in P2 for __set_pmb_entry()
*/
-int __set_pmb_entry(unsigned long vpn, unsigned long ppn,
- unsigned long flags, int *entry)
+void __set_pmb_entry(unsigned long vpn, unsigned long ppn,
+ unsigned long flags, int pos)
{
- unsigned int pos = *entry;
-
- if (unlikely(pos == PMB_NO_ENTRY))
- pos = find_first_zero_bit(&pmb_map, NR_PMB_ENTRIES);
-
-repeat:
- if (unlikely(pos > NR_PMB_ENTRIES))
- return -ENOSPC;
-
- if (test_and_set_bit(pos, &pmb_map)) {
- pos = find_first_zero_bit(&pmb_map, NR_PMB_ENTRIES);
- goto repeat;
- }
-
ctrl_outl(vpn | PMB_V, mk_pmb_addr(pos));
#ifdef CONFIG_CACHE_WRITETHROUGH
@@ -161,21 +169,13 @@ repeat:
#endif
ctrl_outl(ppn | flags | PMB_V, mk_pmb_data(pos));
-
- *entry = pos;
-
- return 0;
}
-int __uses_jump_to_uncached set_pmb_entry(struct pmb_entry *pmbe)
+void __uses_jump_to_uncached set_pmb_entry(struct pmb_entry *pmbe)
{
- int ret;
-
jump_to_uncached();
- ret = __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, &pmbe->entry);
+ __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, pmbe->entry);
back_to_cached();
-
- return ret;
}
void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe)
@@ -239,8 +239,6 @@ long pmb_remap(unsigned long vaddr, unsigned long phys,
again:
for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++) {
- int ret;
-
if (size < pmb_sizes[i].size)
continue;
@@ -250,12 +248,7 @@ again:
goto out;
}
- ret = set_pmb_entry(pmbe);
- if (ret != 0) {
- pmb_free(pmbe);
- err = -EBUSY;
- goto out;
- }
+ set_pmb_entry(pmbe);
phys += pmb_sizes[i].size;
vaddr += pmb_sizes[i].size;
@@ -311,8 +304,17 @@ static void __pmb_unmap(struct pmb_entry *pmbe)
do {
struct pmb_entry *pmblink = pmbe;
- if (pmbe->entry != PMB_NO_ENTRY)
- clear_pmb_entry(pmbe);
+ /*
+ * We may be called before this pmb_entry has been
+ * entered into the PMB table via set_pmb_entry(), but
+ * that's OK because we've allocated a unique slot for
+ * this entry in pmb_alloc() (even if we haven't filled
+ * it yet).
+ *
+ * Therefore, calling clear_pmb_entry() is safe as no
+ * other mapping can be using that slot.
+ */
+ clear_pmb_entry(pmbe);
pmbe = pmblink->link;
@@ -322,11 +324,7 @@ static void __pmb_unmap(struct pmb_entry *pmbe)
static void pmb_cache_ctor(void *pmb)
{
- struct pmb_entry *pmbe = pmb;
-
memset(pmb, 0, sizeof(struct pmb_entry));
-
- pmbe->entry = PMB_NO_ENTRY;
}
static int __uses_jump_to_uncached pmb_init(void)
@@ -349,7 +347,7 @@ static int __uses_jump_to_uncached pmb_init(void)
for (entry = 0; entry < nr_entries; entry++) {
struct pmb_entry *pmbe = pmb_init_map + entry;
- __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, &entry);
+ __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, entry);
}
ctrl_outl(0, PMB_IRMCR);
From 8bd642b17bea31f8361b61c16c8d154638414df4 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Tue, 6 Oct 2009 21:22:24 +0000
Subject: [PATCH 009/137] sh: Obliterate the P1 area macros
Replace the use of PHYSADDR() with __pa(). PHYSADDR() is based on the
idea that all addresses in P1SEG are untranslated, so we can access an
address's physical page as an offset from P1SEG. This doesn't work for
CONFIG_PMB/CONFIG_PMB_FIXED because pages in P1SEG and P2SEG are used
for PMB mappings and so can be translated to any physical address.
Likewise, replace a P1SEGADDR() use with virt_to_phys().
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boot/compressed/misc.c | 2 +-
arch/sh/include/asm/addrspace.h | 3 ---
arch/sh/kernel/machine_kexec.c | 2 +-
arch/sh/mm/cache-sh4.c | 2 +-
arch/sh/mm/cache-sh7705.c | 2 +-
5 files changed, 4 insertions(+), 7 deletions(-)
diff --git a/arch/sh/boot/compressed/misc.c b/arch/sh/boot/compressed/misc.c
index fd56a71ca9d9..b51b1fc4baae 100644
--- a/arch/sh/boot/compressed/misc.c
+++ b/arch/sh/boot/compressed/misc.c
@@ -131,7 +131,7 @@ void decompress_kernel(void)
#ifdef CONFIG_SUPERH64
output_addr = (CONFIG_MEMORY_START + 0x2000);
#else
- output_addr = PHYSADDR((unsigned long)&_text+PAGE_SIZE);
+ output_addr = __pa((unsigned long)&_text+PAGE_SIZE);
#ifdef CONFIG_29BIT
output_addr |= P2SEG;
#endif
diff --git a/arch/sh/include/asm/addrspace.h b/arch/sh/include/asm/addrspace.h
index 80d40813e057..ebd6e49ba39e 100644
--- a/arch/sh/include/asm/addrspace.h
+++ b/arch/sh/include/asm/addrspace.h
@@ -28,9 +28,6 @@
/* Returns the privileged segment base of a given address */
#define PXSEG(a) (((unsigned long)(a)) & 0xe0000000)
-/* Returns the physical address of a PnSEG (n=1,2) address */
-#define PHYSADDR(a) (((unsigned long)(a)) & 0x1fffffff)
-
#if defined(CONFIG_29BIT) || defined(CONFIG_PMB_FIXED)
/*
* Map an address to a certain privileged segment
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c
index 7ea2704ea033..de7cf5477d3f 100644
--- a/arch/sh/kernel/machine_kexec.c
+++ b/arch/sh/kernel/machine_kexec.c
@@ -49,7 +49,7 @@ int machine_kexec_prepare(struct kimage *image)
/* older versions of kexec-tools are passing
* the zImage entry point as a virtual address.
*/
- if (image->start != PHYSADDR(image->start))
+ if (image->start != __pa(image->start))
return -EINVAL; /* upgrade your kexec-tools */
return 0;
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 60588c5bf7f9..639bb329fc81 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -97,7 +97,7 @@ static inline void flush_cache_4096(unsigned long start,
local_irq_save(flags);
__flush_cache_4096(start | SH_CACHE_ASSOC,
- P1SEGADDR(phys), exec_offset);
+ virt_to_phys(phys), exec_offset);
local_irq_restore(flags);
}
diff --git a/arch/sh/mm/cache-sh7705.c b/arch/sh/mm/cache-sh7705.c
index 2601935eb589..f527fb70fce6 100644
--- a/arch/sh/mm/cache-sh7705.c
+++ b/arch/sh/mm/cache-sh7705.c
@@ -141,7 +141,7 @@ static void sh7705_flush_dcache_page(void *arg)
if (mapping && !mapping_mapped(mapping))
set_bit(PG_dcache_dirty, &page->flags);
else
- __flush_dcache_page(PHYSADDR(page_address(page)));
+ __flush_dcache_page(__pa(page_address(page)));
}
static void __uses_jump_to_uncached sh7705_flush_cache_all(void *args)
From 1f69b6af9171f50135cce8023c84d82fbf42a8f5 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Tue, 6 Oct 2009 21:22:25 +0000
Subject: [PATCH 010/137] sh: Prepare for dynamic PMB support
To allow the MMU to be switched between 29bit and 32bit mode at runtime
some constants need to swapped for functions that return a runtime
value.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/addrspace.h | 6 ++++++
arch/sh/include/asm/mmu.h | 3 ++-
arch/sh/include/asm/pgtable.h | 26 ++++++++++++++++++++++----
arch/sh/include/asm/pgtable_32.h | 2 +-
arch/sh/include/asm/scatterlist.h | 2 +-
arch/sh/mm/cache-sh4.c | 6 +++---
arch/sh/mm/init.c | 8 ++++++++
7 files changed, 43 insertions(+), 10 deletions(-)
diff --git a/arch/sh/include/asm/addrspace.h b/arch/sh/include/asm/addrspace.h
index ebd6e49ba39e..99d6b3ecbe22 100644
--- a/arch/sh/include/asm/addrspace.h
+++ b/arch/sh/include/asm/addrspace.h
@@ -57,5 +57,11 @@
#define P3_ADDR_MAX P4SEG
#endif
+#ifndef __ASSEMBLY__
+#ifdef CONFIG_PMB
+extern int __in_29bit_mode(void);
+#endif /* CONFIG_PMB */
+#endif /* __ASSEMBLY__ */
+
#endif /* __KERNEL__ */
#endif /* __ASM_SH_ADDRSPACE_H */
diff --git a/arch/sh/include/asm/mmu.h b/arch/sh/include/asm/mmu.h
index f5963037c9d6..5025e12b7864 100644
--- a/arch/sh/include/asm/mmu.h
+++ b/arch/sh/include/asm/mmu.h
@@ -7,6 +7,8 @@
#define PMB_PASCR 0xff000070
#define PMB_IRMCR 0xff000078
+#define PASCR_SE 0x80000000
+
#define PMB_ADDR 0xf6100000
#define PMB_DATA 0xf7100000
#define PMB_ENTRY_MAX 16
@@ -75,4 +77,3 @@ void pmb_unmap(unsigned long addr);
#endif /* __ASSEMBLY__ */
#endif /* __MMU_H */
-
diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h
index 4f3efa7d5a64..5dff5787dfeb 100644
--- a/arch/sh/include/asm/pgtable.h
+++ b/arch/sh/include/asm/pgtable.h
@@ -75,13 +75,31 @@ static inline unsigned long long neff_sign_extend(unsigned long val)
#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
#define FIRST_USER_ADDRESS 0
-#ifdef CONFIG_32BIT
-#define PHYS_ADDR_MASK 0xffffffff
+#define PHYS_ADDR_MASK29 0x1fffffff
+#define PHYS_ADDR_MASK32 0xffffffff
+
+#ifdef CONFIG_PMB
+static inline unsigned long phys_addr_mask(void)
+{
+ /* Is the MMU in 29bit mode? */
+ if (__in_29bit_mode())
+ return PHYS_ADDR_MASK29;
+
+ return PHYS_ADDR_MASK32;
+}
+#elif CONFIG_32BIT
+static inline unsigned long phys_addr_mask(void)
+{
+ return PHYS_ADDR_MASK32;
+}
#else
-#define PHYS_ADDR_MASK 0x1fffffff
+static inline unsigned long phys_addr_mask(void)
+{
+ return PHYS_ADDR_MASK29;
+}
#endif
-#define PTE_PHYS_MASK (PHYS_ADDR_MASK & PAGE_MASK)
+#define PTE_PHYS_MASK (phys_addr_mask() & PAGE_MASK)
#define PTE_FLAGS_MASK (~(PTE_PHYS_MASK) << PAGE_SHIFT)
#ifdef CONFIG_SUPERH32
diff --git a/arch/sh/include/asm/pgtable_32.h b/arch/sh/include/asm/pgtable_32.h
index c0d359ce337b..b35435516203 100644
--- a/arch/sh/include/asm/pgtable_32.h
+++ b/arch/sh/include/asm/pgtable_32.h
@@ -108,7 +108,7 @@ static inline unsigned long copy_ptea_attributes(unsigned long x)
#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED | _PAGE_FILE)
#endif
-#define _PAGE_FLAGS_HARDWARE_MASK (PHYS_ADDR_MASK & ~(_PAGE_CLEAR_FLAGS))
+#define _PAGE_FLAGS_HARDWARE_MASK (phys_addr_mask() & ~(_PAGE_CLEAR_FLAGS))
/* Hardware flags, page size encoding */
#if !defined(CONFIG_MMU)
diff --git a/arch/sh/include/asm/scatterlist.h b/arch/sh/include/asm/scatterlist.h
index 327cc2e4c97b..e38d1d4c7f6f 100644
--- a/arch/sh/include/asm/scatterlist.h
+++ b/arch/sh/include/asm/scatterlist.h
@@ -1,7 +1,7 @@
#ifndef __ASM_SH_SCATTERLIST_H
#define __ASM_SH_SCATTERLIST_H
-#define ISA_DMA_THRESHOLD PHYS_ADDR_MASK
+#define ISA_DMA_THRESHOLD phys_addr_mask()
#include <asm-generic/scatterlist.h>
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 639bb329fc81..56dd55a1b13e 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -88,12 +88,12 @@ static inline void flush_cache_4096(unsigned long start,
unsigned long flags, exec_offset = 0;
/*
- * All types of SH-4 require PC to be in P2 to operate on the I-cache.
- * Some types of SH-4 require PC to be in P2 to operate on the D-cache.
+ * All types of SH-4 require PC to be uncached to operate on the I-cache.
+ * Some types of SH-4 require PC to be uncached to operate on the D-cache.
*/
if ((boot_cpu_data.flags & CPU_HAS_P2_FLUSH_BUG) ||
(start < CACHE_OC_ADDRESS_ARRAY))
- exec_offset = 0x20000000;
+ exec_offset = cached_to_uncached;
local_irq_save(flags);
__flush_cache_4096(start | SH_CACHE_ASSOC,
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 8173e38afd38..c8af6c5fa586 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -323,4 +323,12 @@ int memory_add_physaddr_to_nid(u64 addr)
}
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif
+
#endif /* CONFIG_MEMORY_HOTPLUG */
+
+#ifdef CONFIG_PMB
+int __in_29bit_mode(void)
+{
+ return !(ctrl_inl(PMB_PASCR) & PASCR_SE);
+}
+#endif /* CONFIG_PMB */
From b336f124b1cca55c28b2c5df0e02aa5ace5be7d4 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Tue, 6 Oct 2009 21:22:26 +0000
Subject: [PATCH 011/137] sh: CONFIG_PMB doesn't mean the MMU is in 32bit mode
CONFIG_PMB will eventually allow the MMU to be switched between 29-bit
and 32-bit mode dynamically at runtime.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/head_32.S | 2 +-
arch/sh/mm/Kconfig | 2 --
2 files changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S
index a78be74b8d3e..1151ecdffa71 100644
--- a/arch/sh/kernel/head_32.S
+++ b/arch/sh/kernel/head_32.S
@@ -33,7 +33,7 @@ ENTRY(empty_zero_page)
.long 1 /* LOADER_TYPE */
.long 0x00000000 /* INITRD_START */
.long 0x00000000 /* INITRD_SIZE */
-#ifdef CONFIG_32BIT
+#if defined(CONFIG_32BIT) && defined(CONFIG_PMB_FIXED)
.long 0x53453f00 + 32 /* "SE?" = 32 bit */
#else
.long 0x53453f00 + 29 /* "SE?" = 29 bit */
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 64dc1ad59801..b8a9032c74be 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -83,7 +83,6 @@ config 32BIT
config PMB_ENABLE
bool "Support 32-bit physical addressing through PMB"
depends on MMU && EXPERIMENTAL && (CPU_SUBTYPE_SH7757 || CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785)
- select 32BIT
default y
help
If you say Y here, physical addressing will be extended to
@@ -98,7 +97,6 @@ choice
config PMB
bool "PMB"
depends on MMU && EXPERIMENTAL && (CPU_SUBTYPE_SH7757 || CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785)
- select 32BIT
help
If you say Y here, physical addressing will be extended to
32-bits through the SH-4A PMB. If this is not set, legacy
From 8386aebb9e15a94137693ea4f4df84207f71cc75 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Tue, 6 Oct 2009 21:22:28 +0000
Subject: [PATCH 012/137] sh: Make most PMB functions static
There's no need to export the internal PMB functions for allocating,
freeing and modifying PMB entries, etc. This way we can restrict the
interface for PMB.
Also remove the static from pmb_init() so that we have more freedom in
setting up the initial PMB entries and turning on MMU 32bit mode.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/mmu.h | 8 +-------
arch/sh/kernel/setup.c | 4 ++++
arch/sh/mm/pmb.c | 17 ++++++++---------
3 files changed, 13 insertions(+), 16 deletions(-)
diff --git a/arch/sh/include/asm/mmu.h b/arch/sh/include/asm/mmu.h
index 5025e12b7864..9c84b4546c8d 100644
--- a/arch/sh/include/asm/mmu.h
+++ b/arch/sh/include/asm/mmu.h
@@ -64,16 +64,10 @@ struct pmb_entry {
};
/* arch/sh/mm/pmb.c */
-int __set_pmb_entry(unsigned long vpn, unsigned long ppn,
- unsigned long flags, int *entry);
-int set_pmb_entry(struct pmb_entry *pmbe);
-void clear_pmb_entry(struct pmb_entry *pmbe);
-struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
- unsigned long flags);
-void pmb_free(struct pmb_entry *pmbe);
long pmb_remap(unsigned long virt, unsigned long phys,
unsigned long size, unsigned long flags);
void pmb_unmap(unsigned long addr);
+int pmb_init(void);
#endif /* __ASSEMBLY__ */
#endif /* __MMU_H */
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index f9d44f8e0df6..8fdd03a67680 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -453,6 +453,10 @@ void __init setup_arch(char **cmdline_p)
paging_init();
+#ifdef CONFIG_PMB
+ pmb_init();
+#endif
+
#ifdef CONFIG_SMP
plat_smp_setup();
#endif
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index b8a33949296a..f01c8191144c 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -115,8 +115,8 @@ repeat:
return pos;
}
-struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
- unsigned long flags)
+static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
+ unsigned long flags)
{
struct pmb_entry *pmbe;
int pos;
@@ -141,7 +141,7 @@ struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
return pmbe;
}
-void pmb_free(struct pmb_entry *pmbe)
+static void pmb_free(struct pmb_entry *pmbe)
{
spin_lock_irq(&pmb_list_lock);
pmb_list_del(pmbe);
@@ -153,8 +153,8 @@ void pmb_free(struct pmb_entry *pmbe)
/*
* Must be in P2 for __set_pmb_entry()
*/
-void __set_pmb_entry(unsigned long vpn, unsigned long ppn,
- unsigned long flags, int pos)
+static void __set_pmb_entry(unsigned long vpn, unsigned long ppn,
+ unsigned long flags, int pos)
{
ctrl_outl(vpn | PMB_V, mk_pmb_addr(pos));
@@ -171,14 +171,14 @@ void __set_pmb_entry(unsigned long vpn, unsigned long ppn,
ctrl_outl(ppn | flags | PMB_V, mk_pmb_data(pos));
}
-void __uses_jump_to_uncached set_pmb_entry(struct pmb_entry *pmbe)
+static void __uses_jump_to_uncached set_pmb_entry(struct pmb_entry *pmbe)
{
jump_to_uncached();
__set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, pmbe->entry);
back_to_cached();
}
-void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe)
+static void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe)
{
unsigned int entry = pmbe->entry;
unsigned long addr;
@@ -327,7 +327,7 @@ static void pmb_cache_ctor(void *pmb)
memset(pmb, 0, sizeof(struct pmb_entry));
}
-static int __uses_jump_to_uncached pmb_init(void)
+int __uses_jump_to_uncached pmb_init(void)
{
unsigned int nr_entries = ARRAY_SIZE(pmb_init_map);
unsigned int entry, i;
@@ -364,7 +364,6 @@ static int __uses_jump_to_uncached pmb_init(void)
return 0;
}
-arch_initcall(pmb_init);
static int pmb_seq_show(struct seq_file *file, void *iter)
{
From edd7de803c79c7df117bf3f0e22ffdba1b1ef256 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Tue, 6 Oct 2009 21:22:29 +0000
Subject: [PATCH 013/137] sh: Get rid of the kmem cache code
Unfortunately, at the time during in boot when we want to be setting up
the PMB entries, the kmem subsystem hasn't been initialised.
We now match pmb_map slots with pmb_entry_list slots. When we find an
empty slot in pmb_map, we set the bit, thereby acquiring the
corresponding pmb_entry_list entry. There is a benefit in using this
static array of struct pmb_entry's; we don't need to acquire any locks
in order to traverse the list of struct pmb_entry's.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/pmb.c | 81 ++++++++++++++++--------------------------------
1 file changed, 26 insertions(+), 55 deletions(-)
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index f01c8191144c..baf365fcdb4a 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -35,7 +35,7 @@
static void __pmb_unmap(struct pmb_entry *);
-static struct kmem_cache *pmb_cache;
+static struct pmb_entry pmb_entry_list[NR_PMB_ENTRIES];
static unsigned long pmb_map;
static struct pmb_entry pmb_init_map[] = {
@@ -73,32 +73,6 @@ static inline unsigned long mk_pmb_data(unsigned int entry)
return mk_pmb_entry(entry) | PMB_DATA;
}
-static DEFINE_SPINLOCK(pmb_list_lock);
-static struct pmb_entry *pmb_list;
-
-static inline void pmb_list_add(struct pmb_entry *pmbe)
-{
- struct pmb_entry **p, *tmp;
-
- p = &pmb_list;
- while ((tmp = *p) != NULL)
- p = &tmp->next;
-
- pmbe->next = tmp;
- *p = pmbe;
-}
-
-static inline void pmb_list_del(struct pmb_entry *pmbe)
-{
- struct pmb_entry **p, *tmp;
-
- for (p = &pmb_list; (tmp = *p); p = &tmp->next)
- if (tmp == pmbe) {
- *p = tmp->next;
- return;
- }
-}
-
static int pmb_alloc_entry(void)
{
unsigned int pos;
@@ -125,7 +99,7 @@ static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
if (pos < 0)
return ERR_PTR(pos);
- pmbe = kmem_cache_alloc(pmb_cache, GFP_KERNEL);
+ pmbe = &pmb_entry_list[pos];
if (!pmbe)
return ERR_PTR(-ENOMEM);
@@ -134,20 +108,19 @@ static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
pmbe->flags = flags;
pmbe->entry = pos;
- spin_lock_irq(&pmb_list_lock);
- pmb_list_add(pmbe);
- spin_unlock_irq(&pmb_list_lock);
-
return pmbe;
}
static void pmb_free(struct pmb_entry *pmbe)
{
- spin_lock_irq(&pmb_list_lock);
- pmb_list_del(pmbe);
- spin_unlock_irq(&pmb_list_lock);
+ int pos = pmbe->entry;
- kmem_cache_free(pmb_cache, pmbe);
+ pmbe->vpn = 0;
+ pmbe->ppn = 0;
+ pmbe->flags = 0;
+ pmbe->entry = 0;
+
+ clear_bit(pos, &pmb_map);
}
/*
@@ -202,8 +175,6 @@ static void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe)
ctrl_outl(ctrl_inl(addr) & ~PMB_V, addr);
back_to_cached();
-
- clear_bit(entry, &pmb_map);
}
@@ -285,11 +256,16 @@ out:
void pmb_unmap(unsigned long addr)
{
- struct pmb_entry **p, *pmbe;
+ struct pmb_entry *pmbe = NULL;
+ int i;
- for (p = &pmb_list; (pmbe = *p); p = &pmbe->next)
- if (pmbe->vpn == addr)
- break;
+ for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
+ if (test_bit(i, &pmb_map)) {
+ pmbe = &pmb_entry_list[i];
+ if (pmbe->vpn == addr)
+ break;
+ }
+ }
if (unlikely(!pmbe))
return;
@@ -299,7 +275,7 @@ void pmb_unmap(unsigned long addr)
static void __pmb_unmap(struct pmb_entry *pmbe)
{
- WARN_ON(!test_bit(pmbe->entry, &pmb_map));
+ BUG_ON(!test_bit(pmbe->entry, &pmb_map));
do {
struct pmb_entry *pmblink = pmbe;
@@ -322,11 +298,6 @@ static void __pmb_unmap(struct pmb_entry *pmbe)
} while (pmbe);
}
-static void pmb_cache_ctor(void *pmb)
-{
- memset(pmb, 0, sizeof(struct pmb_entry));
-}
-
int __uses_jump_to_uncached pmb_init(void)
{
unsigned int nr_entries = ARRAY_SIZE(pmb_init_map);
@@ -334,9 +305,6 @@ int __uses_jump_to_uncached pmb_init(void)
BUG_ON(unlikely(nr_entries >= NR_PMB_ENTRIES));
- pmb_cache = kmem_cache_create("pmb", sizeof(struct pmb_entry), 0,
- SLAB_PANIC, pmb_cache_ctor);
-
jump_to_uncached();
/*
@@ -431,15 +399,18 @@ postcore_initcall(pmb_debugfs_init);
static int pmb_sysdev_suspend(struct sys_device *dev, pm_message_t state)
{
static pm_message_t prev_state;
+ int i;
/* Restore the PMB after a resume from hibernation */
if (state.event == PM_EVENT_ON &&
prev_state.event == PM_EVENT_FREEZE) {
struct pmb_entry *pmbe;
- spin_lock_irq(&pmb_list_lock);
- for (pmbe = pmb_list; pmbe; pmbe = pmbe->next)
- set_pmb_entry(pmbe);
- spin_unlock_irq(&pmb_list_lock);
+ for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
+ if (test_bit(i, &pmb_map)) {
+ pmbe = &pmb_entry_list[i];
+ set_pmb_entry(pmbe);
+ }
+ }
}
prev_state = state;
return 0;
From 3105121949b609964f370d42d1b90fe7fc01d6b1 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Tue, 6 Oct 2009 21:22:30 +0000
Subject: [PATCH 014/137] sh: Remap physical memory into P1 and P2 in
pmb_init()
Eventually we'll have complete control over what physical memory gets
mapped where and we can probably do other interesting things. For now
though, when the MMU is in 32-bit mode, we map physical memory into the
P1 and P2 virtual address ranges with the same semantics as they have in
29-bit mode.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/io.h | 4 +--
arch/sh/mm/consistent.c | 2 +-
arch/sh/mm/pmb.c | 54 +++++++++++-----------------------------
3 files changed, 18 insertions(+), 42 deletions(-)
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index 5be45ea4dfec..0cf2a5708e26 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -246,7 +246,7 @@ void __iounmap(void __iomem *addr);
static inline void __iomem *
__ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
{
-#if defined(CONFIG_SUPERH32) && !defined(CONFIG_PMB_FIXED)
+#if defined(CONFIG_SUPERH32) && !defined(CONFIG_PMB_FIXED) && !defined(CONFIG_PMB)
unsigned long last_addr = offset + size - 1;
#endif
void __iomem *ret;
@@ -255,7 +255,7 @@ __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
if (ret)
return ret;
-#if defined(CONFIG_SUPERH32) && !defined(CONFIG_PMB_FIXED)
+#if defined(CONFIG_SUPERH32) && !defined(CONFIG_PMB_FIXED) && !defined(CONFIG_PMB)
/*
* For P1 and P2 space this is trivial, as everything is already
* mapped. Uncached access for P1 addresses are done through P2.
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index e098ec158ddb..9a8403d9344b 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -85,7 +85,7 @@ EXPORT_SYMBOL(dma_free_coherent);
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
-#ifdef CONFIG_CPU_SH5
+#if defined(CONFIG_CPU_SH5) || defined(CONFIG_PMB)
void *p1addr = vaddr;
#else
void *p1addr = (void*) P1SEGADDR((unsigned long)vaddr);
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index baf365fcdb4a..2d009bdcf901 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -38,26 +38,6 @@ static void __pmb_unmap(struct pmb_entry *);
static struct pmb_entry pmb_entry_list[NR_PMB_ENTRIES];
static unsigned long pmb_map;
-static struct pmb_entry pmb_init_map[] = {
- /* vpn ppn flags (ub/sz/c/wt) */
-
- /* P1 Section Mappings */
- { 0x80000000, 0x00000000, PMB_SZ_64M | PMB_C, },
- { 0x84000000, 0x04000000, PMB_SZ_64M | PMB_C, },
- { 0x88000000, 0x08000000, PMB_SZ_128M | PMB_C, },
- { 0x90000000, 0x10000000, PMB_SZ_64M | PMB_C, },
- { 0x94000000, 0x14000000, PMB_SZ_64M | PMB_C, },
- { 0x98000000, 0x18000000, PMB_SZ_64M | PMB_C, },
-
- /* P2 Section Mappings */
- { 0xa0000000, 0x00000000, PMB_UB | PMB_SZ_64M | PMB_WT, },
- { 0xa4000000, 0x04000000, PMB_UB | PMB_SZ_64M | PMB_WT, },
- { 0xa8000000, 0x08000000, PMB_UB | PMB_SZ_128M | PMB_WT, },
- { 0xb0000000, 0x10000000, PMB_UB | PMB_SZ_64M | PMB_WT, },
- { 0xb4000000, 0x14000000, PMB_UB | PMB_SZ_64M | PMB_WT, },
- { 0xb8000000, 0x18000000, PMB_UB | PMB_SZ_64M | PMB_WT, },
-};
-
static inline unsigned long mk_pmb_entry(unsigned int entry)
{
return (entry & PMB_E_MASK) << PMB_E_SHIFT;
@@ -156,13 +136,7 @@ static void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe)
unsigned int entry = pmbe->entry;
unsigned long addr;
- /*
- * Don't allow clearing of wired init entries, P1 or P2 access
- * without a corresponding mapping in the PMB will lead to reset
- * by the TLB.
- */
- if (unlikely(entry < ARRAY_SIZE(pmb_init_map) ||
- entry >= NR_PMB_ENTRIES))
+ if (unlikely(entry >= NR_PMB_ENTRIES))
return;
jump_to_uncached();
@@ -300,28 +274,30 @@ static void __pmb_unmap(struct pmb_entry *pmbe)
int __uses_jump_to_uncached pmb_init(void)
{
- unsigned int nr_entries = ARRAY_SIZE(pmb_init_map);
- unsigned int entry, i;
-
- BUG_ON(unlikely(nr_entries >= NR_PMB_ENTRIES));
+ unsigned int i;
+ long size;
jump_to_uncached();
/*
- * Ordering is important, P2 must be mapped in the PMB before we
- * can set PMB.SE, and P1 must be mapped before we jump back to
- * P1 space.
+ * Insert PMB entries for the P1 and P2 areas so that, after
+ * we've switched the MMU to 32-bit mode, the semantics of P1
+ * and P2 are the same as in 29-bit mode, e.g.
+ *
+ * P1 - provides a cached window onto physical memory
+ * P2 - provides an uncached window onto physical memory
*/
- for (entry = 0; entry < nr_entries; entry++) {
- struct pmb_entry *pmbe = pmb_init_map + entry;
+ size = pmb_remap(P2SEG, __MEMORY_START, __MEMORY_SIZE,
+ PMB_WT | PMB_UB);
+ BUG_ON(size != __MEMORY_SIZE);
- __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, entry);
- }
+ size = pmb_remap(P1SEG, __MEMORY_START, __MEMORY_SIZE, PMB_C);
+ BUG_ON(size != __MEMORY_SIZE);
ctrl_outl(0, PMB_IRMCR);
/* PMB.SE and UB[7] */
- ctrl_outl((1 << 31) | (1 << 7), PMB_PASCR);
+ ctrl_outl(PASCR_SE | (1 << 7), PMB_PASCR);
/* Flush out the TLB */
i = ctrl_inl(MMUCR);
From ef269b32763b22100eda9c0bf99d462c6cd65377 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Tue, 6 Oct 2009 21:22:32 +0000
Subject: [PATCH 015/137] sh: Fix the offset from P1SEG/P2SEG where we map RAM
We need to map the gap between 0x00000000 and __MEMORY_START in the PMB,
as well as RAM.
With this change my 7785LCR board can switch to 32bit MMU mode at
runtime.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/pmb.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index 2d009bdcf901..7e64f6d960c5 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -275,7 +275,7 @@ static void __pmb_unmap(struct pmb_entry *pmbe)
int __uses_jump_to_uncached pmb_init(void)
{
unsigned int i;
- long size;
+ long size, ret;
jump_to_uncached();
@@ -287,12 +287,13 @@ int __uses_jump_to_uncached pmb_init(void)
* P1 - provides a cached window onto physical memory
* P2 - provides an uncached window onto physical memory
*/
- size = pmb_remap(P2SEG, __MEMORY_START, __MEMORY_SIZE,
- PMB_WT | PMB_UB);
- BUG_ON(size != __MEMORY_SIZE);
+ size = __MEMORY_START + __MEMORY_SIZE;
- size = pmb_remap(P1SEG, __MEMORY_START, __MEMORY_SIZE, PMB_C);
- BUG_ON(size != __MEMORY_SIZE);
+ ret = pmb_remap(P1SEG, 0x00000000, size, PMB_C);
+ BUG_ON(ret != size);
+
+ ret = pmb_remap(P2SEG, 0x00000000, size, PMB_WT | PMB_UB);
+ BUG_ON(ret != size);
ctrl_outl(0, PMB_IRMCR);
From 20b5014b3e5fe7b874a3f6a1dc03b0c21cb222cd Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Tue, 6 Oct 2009 21:22:33 +0000
Subject: [PATCH 016/137] sh: Fold fixed-PMB support into dynamic PMB support
The initialisation process differs for CONFIG_PMB and for
CONFIG_PMB_FIXED. For CONFIG_PMB_FIXED we need to register the PMB
entries that were allocated by the bootloader.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/mmu.h | 2 ++
arch/sh/kernel/setup.c | 2 +-
arch/sh/mm/Makefile | 3 +-
arch/sh/mm/pmb-fixed.c | 45 ---------------------------
arch/sh/mm/pmb.c | 65 ++++++++++++++++++++++++++++++++++++---
5 files changed, 64 insertions(+), 53 deletions(-)
delete mode 100644 arch/sh/mm/pmb-fixed.c
diff --git a/arch/sh/include/asm/mmu.h b/arch/sh/include/asm/mmu.h
index 9c84b4546c8d..c7426ad9926e 100644
--- a/arch/sh/include/asm/mmu.h
+++ b/arch/sh/include/asm/mmu.h
@@ -15,6 +15,8 @@
#define PMB_E_MASK 0x0000000f
#define PMB_E_SHIFT 8
+#define PMB_PFN_MASK 0xff000000
+
#define PMB_SZ_16M 0x00000000
#define PMB_SZ_64M 0x00000010
#define PMB_SZ_128M 0x00000080
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 8fdd03a67680..df65fe2d43b8 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -453,7 +453,7 @@ void __init setup_arch(char **cmdline_p)
paging_init();
-#ifdef CONFIG_PMB
+#ifdef CONFIG_PMB_ENABLE
pmb_init();
#endif
diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile
index 3759bf853293..8a70535fa7ce 100644
--- a/arch/sh/mm/Makefile
+++ b/arch/sh/mm/Makefile
@@ -33,8 +33,7 @@ obj-y += $(tlb-y)
endif
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_PMB) += pmb.o
-obj-$(CONFIG_PMB_FIXED) += pmb-fixed.o
+obj-$(CONFIG_PMB_ENABLE) += pmb.o
obj-$(CONFIG_NUMA) += numa.o
# Special flags for fault_64.o. This puts restrictions on the number of
diff --git a/arch/sh/mm/pmb-fixed.c b/arch/sh/mm/pmb-fixed.c
deleted file mode 100644
index 43c8eac4d8a1..000000000000
--- a/arch/sh/mm/pmb-fixed.c
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * arch/sh/mm/fixed_pmb.c
- *
- * Copyright (C) 2009 Renesas Solutions Corp.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/init.h>
-#include <linux/mm.h>
-#include <linux/io.h>
-#include <asm/mmu.h>
-#include <asm/mmu_context.h>
-
-static int __uses_jump_to_uncached fixed_pmb_init(void)
-{
- int i;
- unsigned long addr, data;
-
- jump_to_uncached();
-
- for (i = 0; i < PMB_ENTRY_MAX; i++) {
- addr = PMB_DATA + (i << PMB_E_SHIFT);
- data = ctrl_inl(addr);
- if (!(data & PMB_V))
- continue;
-
- if (data & PMB_C) {
-#if defined(CONFIG_CACHE_WRITETHROUGH)
- data |= PMB_WT;
-#elif defined(CONFIG_CACHE_WRITEBACK)
- data &= ~PMB_WT;
-#else
- data &= ~(PMB_C | PMB_WT);
-#endif
- }
- ctrl_outl(data, addr);
- }
-
- back_to_cached();
-
- return 0;
-}
-arch_initcall(fixed_pmb_init);
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index 7e64f6d960c5..280f6a166035 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -70,14 +70,20 @@ repeat:
}
static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
- unsigned long flags)
+ unsigned long flags, int entry)
{
struct pmb_entry *pmbe;
int pos;
- pos = pmb_alloc_entry();
- if (pos < 0)
- return ERR_PTR(pos);
+ if (entry == PMB_NO_ENTRY) {
+ pos = pmb_alloc_entry();
+ if (pos < 0)
+ return ERR_PTR(pos);
+ } else {
+ if (test_bit(entry, &pmb_map))
+ return ERR_PTR(-ENOSPC);
+ pos = entry;
+ }
pmbe = &pmb_entry_list[pos];
if (!pmbe)
@@ -187,7 +193,8 @@ again:
if (size < pmb_sizes[i].size)
continue;
- pmbe = pmb_alloc(vaddr, phys, pmb_flags | pmb_sizes[i].flag);
+ pmbe = pmb_alloc(vaddr, phys, pmb_flags | pmb_sizes[i].flag,
+ PMB_NO_ENTRY);
if (IS_ERR(pmbe)) {
err = PTR_ERR(pmbe);
goto out;
@@ -272,6 +279,7 @@ static void __pmb_unmap(struct pmb_entry *pmbe)
} while (pmbe);
}
+#ifdef CONFIG_PMB
int __uses_jump_to_uncached pmb_init(void)
{
unsigned int i;
@@ -309,6 +317,53 @@ int __uses_jump_to_uncached pmb_init(void)
return 0;
}
+#else
+int __uses_jump_to_uncached pmb_init(void)
+{
+ int i;
+ unsigned long addr, data;
+
+ jump_to_uncached();
+
+ for (i = 0; i < PMB_ENTRY_MAX; i++) {
+ struct pmb_entry *pmbe;
+ unsigned long vpn, ppn, flags;
+
+ addr = PMB_DATA + (i << PMB_E_SHIFT);
+ data = ctrl_inl(addr);
+ if (!(data & PMB_V))
+ continue;
+
+ if (data & PMB_C) {
+#if defined(CONFIG_CACHE_WRITETHROUGH)
+ data |= PMB_WT;
+#elif defined(CONFIG_CACHE_WRITEBACK)
+ data &= ~PMB_WT;
+#else
+ data &= ~(PMB_C | PMB_WT);
+#endif
+ }
+ ctrl_outl(data, addr);
+
+ ppn = data & PMB_PFN_MASK;
+
+ flags = data & (PMB_C | PMB_WT | PMB_UB);
+ flags |= data & PMB_SZ_MASK;
+
+ addr = PMB_ADDR + (i << PMB_E_SHIFT);
+ data = ctrl_inl(addr);
+
+ vpn = data & PMB_PFN_MASK;
+
+ pmbe = pmb_alloc(vpn, ppn, flags, i);
+ WARN_ON(IS_ERR(pmbe));
+ }
+
+ back_to_cached();
+
+ return 0;
+}
+#endif /* CONFIG_PMB */
static int pmb_seq_show(struct seq_file *file, void *iter)
{
From 2a8bc923455f320da6c460258c21d2235ab2edc8 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Sat, 10 Oct 2009 22:24:55 +0900
Subject: [PATCH 017/137] sh: Shut up CONFIG_32BIT=n compiler warnings.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/pgtable.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h
index 5dff5787dfeb..ba3046e4f06f 100644
--- a/arch/sh/include/asm/pgtable.h
+++ b/arch/sh/include/asm/pgtable.h
@@ -87,7 +87,7 @@ static inline unsigned long phys_addr_mask(void)
return PHYS_ADDR_MASK32;
}
-#elif CONFIG_32BIT
+#elif defined(CONFIG_32BIT)
static inline unsigned long phys_addr_mask(void)
{
return PHYS_ADDR_MASK32;
From 3d4e0cfb3372ee7754f743ab90944540cef4ecc6 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Sat, 10 Oct 2009 22:45:41 +0900
Subject: [PATCH 018/137] sh: Reinstate ILSEL -> IRL intc mappings for SH-X3
proto CPU.
In the multi-evt conversion for the SH-X3 proto CPU, IRLs were dropped
down to a single unique masking source, which ended up blowing up on
ILSEL-based IRQs which have special semantics that otherwise confuse the
intc code. While this does result in intc spewing about not having a
unique masking source, we don't really care.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4a/setup-shx3.c | 28 ++++++++++++++++++----------
1 file changed, 18 insertions(+), 10 deletions(-)
diff --git a/arch/sh/kernel/cpu/sh4a/setup-shx3.c b/arch/sh/kernel/cpu/sh4a/setup-shx3.c
index e848443deeb9..485330cf8549 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-shx3.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-shx3.c
@@ -268,7 +268,11 @@ enum {
UNUSED = 0,
/* interrupt sources */
- IRL, IRQ0, IRQ1, IRQ2, IRQ3,
+ IRL_LLLL, IRL_LLLH, IRL_LLHL, IRL_LLHH,
+ IRL_LHLL, IRL_LHLH, IRL_LHHL, IRL_LHHH,
+ IRL_HLLL, IRL_HLLH, IRL_HLHL, IRL_HLHH,
+ IRL_HHLL, IRL_HHLH, IRL_HHHL,
+ IRQ0, IRQ1, IRQ2, IRQ3,
HUDII,
TMU0, TMU1, TMU2, TMU3, TMU4, TMU5,
PCII0, PCII1, PCII2, PCII3, PCII4,
@@ -291,7 +295,7 @@ enum {
INTICI4, INTICI5, INTICI6, INTICI7,
/* interrupt groups */
- PCII56789, SCIF0, SCIF1, SCIF2, SCIF3,
+ IRL, PCII56789, SCIF0, SCIF1, SCIF2, SCIF3,
DMAC0, DMAC1,
};
@@ -344,6 +348,10 @@ static struct intc_vect vectors[] __initdata = {
};
static struct intc_group groups[] __initdata = {
+ INTC_GROUP(IRL, IRL_LLLL, IRL_LLLH, IRL_LLHL, IRL_LLHH,
+ IRL_LHLL, IRL_LHLH, IRL_LHHL, IRL_LHHH,
+ IRL_HLLL, IRL_HLLH, IRL_HLHL, IRL_HLHH,
+ IRL_HHLL, IRL_HHLH, IRL_HHHL),
INTC_GROUP(PCII56789, PCII5, PCII6, PCII7, PCII8, PCII9),
INTC_GROUP(SCIF0, SCIF0_ERI, SCIF0_RXI, SCIF0_BRI, SCIF0_TXI),
INTC_GROUP(SCIF1, SCIF1_ERI, SCIF1_RXI, SCIF1_BRI, SCIF1_TXI),
@@ -419,14 +427,14 @@ static DECLARE_INTC_DESC(intc_desc_irq, "shx3-irq", vectors_irq, groups,
/* External interrupt pins in IRL mode */
static struct intc_vect vectors_irl[] __initdata = {
- INTC_VECT(IRL, 0x200), INTC_VECT(IRL, 0x220),
- INTC_VECT(IRL, 0x240), INTC_VECT(IRL, 0x260),
- INTC_VECT(IRL, 0x280), INTC_VECT(IRL, 0x2a0),
- INTC_VECT(IRL, 0x2c0), INTC_VECT(IRL, 0x2e0),
- INTC_VECT(IRL, 0x300), INTC_VECT(IRL, 0x320),
- INTC_VECT(IRL, 0x340), INTC_VECT(IRL, 0x360),
- INTC_VECT(IRL, 0x380), INTC_VECT(IRL, 0x3a0),
- INTC_VECT(IRL, 0x3c0),
+ INTC_VECT(IRL_LLLL, 0x200), INTC_VECT(IRL_LLLH, 0x220),
+ INTC_VECT(IRL_LLHL, 0x240), INTC_VECT(IRL_LLHH, 0x260),
+ INTC_VECT(IRL_LHLL, 0x280), INTC_VECT(IRL_LHLH, 0x2a0),
+ INTC_VECT(IRL_LHHL, 0x2c0), INTC_VECT(IRL_LHHH, 0x2e0),
+ INTC_VECT(IRL_HLLL, 0x300), INTC_VECT(IRL_HLLH, 0x320),
+ INTC_VECT(IRL_HLHL, 0x340), INTC_VECT(IRL_HLHH, 0x360),
+ INTC_VECT(IRL_HHLL, 0x380), INTC_VECT(IRL_HHLH, 0x3a0),
+ INTC_VECT(IRL_HHHL, 0x3c0),
};
static DECLARE_INTC_DESC(intc_desc_irl, "shx3-irl", vectors_irl, groups,
From a6a2f2ad67506090e332f440457553c0ec011d68 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Fri, 9 Oct 2009 23:20:54 +0100
Subject: [PATCH 019/137] sh: Teach the DWARF unwinder about modules
Pass a module's .eh_frame section to the DWARF unwinder at module load
time so that the section's FDEs and CIEs can be registered with the
DWARF unwinder. This allows us to unwind the stack through module code
when generating backtraces.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
---
arch/sh/include/asm/dwarf.h | 15 +++
arch/sh/kernel/dwarf.c | 181 +++++++++++++++++++++++++-----------
arch/sh/kernel/module.c | 32 +++++++
3 files changed, 175 insertions(+), 53 deletions(-)
diff --git a/arch/sh/include/asm/dwarf.h b/arch/sh/include/asm/dwarf.h
index c367ed3373c5..aacdc746d07c 100644
--- a/arch/sh/include/asm/dwarf.h
+++ b/arch/sh/include/asm/dwarf.h
@@ -241,6 +241,12 @@ struct dwarf_cie {
unsigned long flags;
#define DWARF_CIE_Z_AUGMENTATION (1 << 0)
+
+ /*
+ * 'mod' will be non-NULL if this CIE came from a module's
+ * .eh_frame section.
+ */
+ struct module *mod;
};
/**
@@ -255,6 +261,12 @@ struct dwarf_fde {
unsigned char *instructions;
unsigned char *end;
struct list_head link;
+
+ /*
+ * 'mod' will be non-NULL if this FDE came from a module's
+ * .eh_frame section.
+ */
+ struct module *mod;
};
/**
@@ -364,6 +376,9 @@ static inline unsigned int DW_CFA_operand(unsigned long insn)
extern struct dwarf_frame *dwarf_unwind_stack(unsigned long,
struct dwarf_frame *);
+extern int dwarf_parse_section(char *, char *, struct module *);
+extern void dwarf_module_unload(struct module *);
+
#endif /* !__ASSEMBLY__ */
#define CFI_STARTPROC .cfi_startproc
diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index 577302f31e6a..981315c6d656 100644
--- a/arch/sh/kernel/dwarf.c
+++ b/arch/sh/kernel/dwarf.c
@@ -655,7 +655,7 @@ bail:
}
static int dwarf_parse_cie(void *entry, void *p, unsigned long len,
- unsigned char *end)
+ unsigned char *end, struct module *mod)
{
struct dwarf_cie *cie;
unsigned long flags;
@@ -751,6 +751,8 @@ static int dwarf_parse_cie(void *entry, void *p, unsigned long len,
cie->initial_instructions = p;
cie->instructions_end = end;
+ cie->mod = mod;
+
/* Add to list */
spin_lock_irqsave(&dwarf_cie_lock, flags);
list_add_tail(&cie->link, &dwarf_cie_list);
@@ -761,7 +763,7 @@ static int dwarf_parse_cie(void *entry, void *p, unsigned long len,
static int dwarf_parse_fde(void *entry, u32 entry_type,
void *start, unsigned long len,
- unsigned char *end)
+ unsigned char *end, struct module *mod)
{
struct dwarf_fde *fde;
struct dwarf_cie *cie;
@@ -810,6 +812,8 @@ static int dwarf_parse_fde(void *entry, u32 entry_type,
fde->instructions = p;
fde->end = end;
+ fde->mod = mod;
+
/* Add to list. */
spin_lock_irqsave(&dwarf_fde_lock, flags);
list_add_tail(&fde->link, &dwarf_fde_list);
@@ -874,6 +878,124 @@ static void dwarf_unwinder_cleanup(void)
kmem_cache_destroy(dwarf_frame_cachep);
}
+/**
+ * dwarf_parse_section - parse DWARF section
+ * @eh_frame_start: start address of the .eh_frame section
+ * @eh_frame_end: end address of the .eh_frame section
+ * @mod: the kernel module containing the .eh_frame section
+ *
+ * Parse the information in a .eh_frame section.
+ */
+int dwarf_parse_section(char *eh_frame_start, char *eh_frame_end,
+ struct module *mod)
+{
+ u32 entry_type;
+ void *p, *entry;
+ int count, err;
+ unsigned long len;
+ unsigned int c_entries, f_entries;
+ unsigned char *end;
+
+ c_entries = 0;
+ f_entries = 0;
+ entry = eh_frame_start;
+
+ while ((char *)entry < eh_frame_end) {
+ p = entry;
+
+ count = dwarf_entry_len(p, &len);
+ if (count == 0) {
+ /*
+ * We read a bogus length field value. There is
+ * nothing we can do here apart from disabling
+ * the DWARF unwinder. We can't even skip this
+ * entry and move to the next one because 'len'
+ * tells us where our next entry is.
+ */
+ err = -EINVAL;
+ goto out;
+ } else
+ p += count;
+
+ /* initial length does not include itself */
+ end = p + len;
+
+ entry_type = get_unaligned((u32 *)p);
+ p += 4;
+
+ if (entry_type == DW_EH_FRAME_CIE) {
+ err = dwarf_parse_cie(entry, p, len, end, mod);
+ if (err < 0)
+ goto out;
+ else
+ c_entries++;
+ } else {
+ err = dwarf_parse_fde(entry, entry_type, p, len,
+ end, mod);
+ if (err < 0)
+ goto out;
+ else
+ f_entries++;
+ }
+
+ entry = (char *)entry + len + 4;
+ }
+
+ printk(KERN_INFO "DWARF unwinder initialised: read %u CIEs, %u FDEs\n",
+ c_entries, f_entries);
+
+ return 0;
+
+out:
+ return err;
+}
+
+/**
+ * dwarf_module_unload - remove FDE/CIEs associated with @mod
+ * @mod: the module that is being unloaded
+ *
+ * Remove any FDEs and CIEs from the global lists that came from
+ * @mod's .eh_frame section because @mod is being unloaded.
+ */
+void dwarf_module_unload(struct module *mod)
+{
+ struct dwarf_fde *fde;
+ struct dwarf_cie *cie;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dwarf_cie_lock, flags);
+
+again_cie:
+ list_for_each_entry(cie, &dwarf_cie_list, link) {
+ if (cie->mod == mod)
+ break;
+ }
+
+ if (&cie->link != &dwarf_cie_list) {
+ list_del(&cie->link);
+ kfree(cie);
+ goto again_cie;
+ }
+
+ spin_unlock_irqrestore(&dwarf_cie_lock, flags);
+
+ spin_lock_irqsave(&dwarf_fde_lock, flags);
+
+again_fde:
+ list_for_each_entry(fde, &dwarf_fde_list, link) {
+ if (fde->mod == mod)
+ break;
+ }
+
+ if (&fde->link != &dwarf_fde_list) {
+ list_del(&fde->link);
+ kfree(fde);
+ goto again_fde;
+ }
+
+ spin_unlock_irqrestore(&dwarf_fde_lock, flags);
+}
+
/**
* dwarf_unwinder_init - initialise the dwarf unwinder
*
@@ -885,19 +1007,10 @@ static void dwarf_unwinder_cleanup(void)
*/
static int __init dwarf_unwinder_init(void)
{
- u32 entry_type;
- void *p, *entry;
- int count, err;
- unsigned long len;
- unsigned int c_entries, f_entries;
- unsigned char *end;
+ int err;
INIT_LIST_HEAD(&dwarf_cie_list);
INIT_LIST_HEAD(&dwarf_fde_list);
- c_entries = 0;
- f_entries = 0;
- entry = &__start_eh_frame;
-
dwarf_frame_cachep = kmem_cache_create("dwarf_frames",
sizeof(struct dwarf_frame), 0, SLAB_PANIC, NULL);
dwarf_reg_cachep = kmem_cache_create("dwarf_regs",
@@ -913,47 +1026,9 @@ static int __init dwarf_unwinder_init(void)
mempool_free_slab,
dwarf_reg_cachep);
- while ((char *)entry < __stop_eh_frame) {
- p = entry;
-
- count = dwarf_entry_len(p, &len);
- if (count == 0) {
- /*
- * We read a bogus length field value. There is
- * nothing we can do here apart from disabling
- * the DWARF unwinder. We can't even skip this
- * entry and move to the next one because 'len'
- * tells us where our next entry is.
- */
- goto out;
- } else
- p += count;
-
- /* initial length does not include itself */
- end = p + len;
-
- entry_type = get_unaligned((u32 *)p);
- p += 4;
-
- if (entry_type == DW_EH_FRAME_CIE) {
- err = dwarf_parse_cie(entry, p, len, end);
- if (err < 0)
- goto out;
- else
- c_entries++;
- } else {
- err = dwarf_parse_fde(entry, entry_type, p, len, end);
- if (err < 0)
- goto out;
- else
- f_entries++;
- }
-
- entry = (char *)entry + len + 4;
- }
-
- printk(KERN_INFO "DWARF unwinder initialised: read %u CIEs, %u FDEs\n",
- c_entries, f_entries);
+ err = dwarf_parse_section(__start_eh_frame, __stop_eh_frame, NULL);
+ if (err)
+ goto out;
err = unwinder_register(&dwarf_unwinder);
if (err)
diff --git a/arch/sh/kernel/module.c b/arch/sh/kernel/module.c
index c2efdcde266f..d297a148d16c 100644
--- a/arch/sh/kernel/module.c
+++ b/arch/sh/kernel/module.c
@@ -32,6 +32,7 @@
#include <linux/string.h>
#include <linux/kernel.h>
#include <asm/unaligned.h>
+#include <asm/dwarf.h>
void *module_alloc(unsigned long size)
{
@@ -145,10 +146,41 @@ int module_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
struct module *me)
{
+#ifdef CONFIG_DWARF_UNWINDER
+ unsigned int i, err;
+ unsigned long start, end;
+ char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+
+ start = end = 0;
+
+ for (i = 1; i < hdr->e_shnum; i++) {
+ /* Alloc bit cleared means "ignore it." */
+ if ((sechdrs[i].sh_flags & SHF_ALLOC)
+ && !strcmp(secstrings+sechdrs[i].sh_name, ".eh_frame")) {
+ start = sechdrs[i].sh_addr;
+ end = start + sechdrs[i].sh_size;
+ break;
+ }
+ }
+
+ /* Did we find the .eh_frame section? */
+ if (i != hdr->e_shnum) {
+ err = dwarf_parse_section((char *)start, (char *)end, me);
+ if (err)
+ printk(KERN_WARNING "%s: failed to parse DWARF info\n",
+ me->name);
+ }
+
+#endif /* CONFIG_DWARF_UNWINDER */
+
return module_bug_finalize(hdr, sechdrs, me);
}
void module_arch_cleanup(struct module *mod)
{
module_bug_cleanup(mod);
+
+#ifdef CONFIG_DWARF_UNWINDER
+ dwarf_module_unload(mod);
+#endif /* CONFIG_DWARF_UNWINDER */
}
From ed4fe7f488008f38d5f423f0bcc736b1779d6ddc Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Sat, 10 Oct 2009 16:03:11 +0100
Subject: [PATCH 020/137] sh: Fix memory leak in dwarf_unwind_stack()
If we broke out of the while (1) loop because the return address of
"frame" was zero, then "frame" needs to be free'd before we return.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
---
arch/sh/include/asm/dwarf.h | 1 +
arch/sh/kernel/dwarf.c | 22 ++++++++++++++++------
2 files changed, 17 insertions(+), 6 deletions(-)
diff --git a/arch/sh/include/asm/dwarf.h b/arch/sh/include/asm/dwarf.h
index aacdc746d07c..eef87539963d 100644
--- a/arch/sh/include/asm/dwarf.h
+++ b/arch/sh/include/asm/dwarf.h
@@ -376,6 +376,7 @@ static inline unsigned int DW_CFA_operand(unsigned long insn)
extern struct dwarf_frame *dwarf_unwind_stack(unsigned long,
struct dwarf_frame *);
+extern void dwarf_free_frame(struct dwarf_frame *);
extern int dwarf_parse_section(char *, char *, struct module *);
extern void dwarf_module_unload(struct module *);
diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index 981315c6d656..ce8bff45d72c 100644
--- a/arch/sh/kernel/dwarf.c
+++ b/arch/sh/kernel/dwarf.c
@@ -529,6 +529,16 @@ static int dwarf_cfa_execute_insns(unsigned char *insn_start,
return 0;
}
+/**
+ * dwarf_free_frame - free the memory allocated for @frame
+ * @frame: the frame to free
+ */
+void dwarf_free_frame(struct dwarf_frame *frame)
+{
+ dwarf_frame_free_regs(frame);
+ mempool_free(frame, dwarf_frame_pool);
+}
+
/**
* dwarf_unwind_stack - recursively unwind the stack
* @pc: address of the function to unwind
@@ -649,8 +659,7 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc,
return frame;
bail:
- dwarf_frame_free_regs(frame);
- mempool_free(frame, dwarf_frame_pool);
+ dwarf_free_frame(frame);
return NULL;
}
@@ -837,10 +846,8 @@ static void dwarf_unwinder_dump(struct task_struct *task,
while (1) {
frame = dwarf_unwind_stack(return_addr, _frame);
- if (_frame) {
- dwarf_frame_free_regs(_frame);
- mempool_free(_frame, dwarf_frame_pool);
- }
+ if (_frame)
+ dwarf_free_frame(_frame);
_frame = frame;
@@ -850,6 +857,9 @@ static void dwarf_unwinder_dump(struct task_struct *task,
return_addr = frame->return_addr;
ops->address(data, return_addr, 1);
}
+
+ if (frame)
+ dwarf_free_frame(frame);
}
static struct unwinder dwarf_unwinder = {
From c2d474d6f8b48b6698343cfc1a3630c4647aa7b2 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Sat, 10 Oct 2009 16:17:06 +0100
Subject: [PATCH 021/137] sh: Remove any reference to recursive functions from
comments
Originally, dwarf_unwind_stack() was a recursive function and it seems
that some of the old comments were never updated.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
---
arch/sh/kernel/dwarf.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index ce8bff45d72c..f242cd120cf1 100644
--- a/arch/sh/kernel/dwarf.c
+++ b/arch/sh/kernel/dwarf.c
@@ -540,7 +540,8 @@ void dwarf_free_frame(struct dwarf_frame *frame)
}
/**
- * dwarf_unwind_stack - recursively unwind the stack
+ * dwarf_unwind_stack - unwind the stack
+ *
* @pc: address of the function to unwind
* @prev: struct dwarf_frame of the previous stackframe on the callstack
*
@@ -558,9 +559,9 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc,
unsigned long addr;
/*
- * If this is the first invocation of this recursive function we
- * need get the contents of a physical register to get the CFA
- * in order to begin the virtual unwinding of the stack.
+ * If we're starting at the top of the stack we need get the
+ * contents of a physical register to get the CFA in order to
+ * begin the virtual unwinding of the stack.
*
* NOTE: the return address is guaranteed to be setup by the
* time this function makes its first function call.
@@ -582,9 +583,8 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc,
fde = dwarf_lookup_fde(pc);
if (!fde) {
/*
- * This is our normal exit path - the one that stops the
- * recursion. There's two reasons why we might exit
- * here,
+ * This is our normal exit path. There are two reasons
+ * why we might exit here,
*
* a) pc has no asscociated DWARF frame info and so
* we don't know how to unwind this frame. This is
@@ -626,10 +626,10 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc,
} else {
/*
- * Again, this is the first invocation of this
- * recurisve function. We need to physically
- * read the contents of a register in order to
- * get the Canonical Frame Address for this
+ * Again, we're starting from the top of the
+ * stack. We need to physically read
+ * the contents of a register in order to get
+ * the Canonical Frame Address for this
* function.
*/
frame->cfa = dwarf_read_arch_reg(frame->cfa_register);
From d26cddbbd23b81eac4fcf340b633e97b40b8d3a1 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Sun, 11 Oct 2009 17:56:17 +0100
Subject: [PATCH 022/137] sh: tracing: Use the DWARF unwinder for CALLER_ADDRx
The major reason for implementing the DWARF unwinder in the first place
was so that we could stop using __builtin_return_address(n), which
doesn't work on SH for n > 0.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
---
arch/sh/include/asm/ftrace.h | 47 ++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/arch/sh/include/asm/ftrace.h b/arch/sh/include/asm/ftrace.h
index 12f3a31f20af..5ea9030725c0 100644
--- a/arch/sh/include/asm/ftrace.h
+++ b/arch/sh/include/asm/ftrace.h
@@ -32,6 +32,53 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr)
return addr;
}
+
+#ifdef CONFIG_DWARF_UNWINDER
+#include <asm/dwarf.h>
+
+#define HAVE_ARCH_CALLER_ADDR
+
+static inline unsigned long dwarf_return_address(int depth)
+{
+ struct dwarf_frame *frame;
+ unsigned long ra;
+ int i;
+
+ for (i = 0, frame = NULL, ra = 0; i <= depth; i++) {
+ struct dwarf_frame *tmp;
+
+ tmp = dwarf_unwind_stack(ra, frame);
+
+ if (frame)
+ dwarf_free_frame(frame);
+
+ frame = tmp;
+
+ if (!frame || !frame->return_addr)
+ break;
+
+ ra = frame->return_addr;
+ }
+
+ /* Failed to unwind the stack to the specified depth. */
+ WARN_ON(i != depth + 1);
+
+ if (frame)
+ dwarf_free_frame(frame);
+
+ return ra;
+}
+
+#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
+#define CALLER_ADDR1 dwarf_return_address(1)
+#define CALLER_ADDR2 dwarf_return_address(2)
+#define CALLER_ADDR3 dwarf_return_address(3)
+#define CALLER_ADDR4 dwarf_return_address(4)
+#define CALLER_ADDR5 dwarf_return_address(5)
+#define CALLER_ADDR6 dwarf_return_address(6)
+
+#endif /* CONFIG_DWARF_UNWINDER */
+
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_FUNCTION_TRACER */
From 54d5102fac3dd4034104e1b38a44a873d5f3a8d3 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 13 Oct 2009 12:30:40 +0900
Subject: [PATCH 023/137] cdrom: gdrom: Kill off PHYSADDR use.
PHYSADDR() is gone, and completely unecessary in all of the cases the
gdrom driver was using it. Kill off all references to it, and change the
one legitimate use over to virt_to_phys() instead.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/cdrom/gdrom.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index a762283d2a21..e789e6c9a422 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -214,7 +214,7 @@ static void gdrom_spicommand(void *spi_string, int buflen)
gdrom_getsense(NULL);
return;
}
- outsw(PHYSADDR(GDROM_DATA_REG), cmd, 6);
+ outsw(GDROM_DATA_REG, cmd, 6);
}
@@ -298,7 +298,7 @@ static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session)
err = -EINVAL;
goto cleanup_readtoc;
}
- insw(PHYSADDR(GDROM_DATA_REG), toc, tocsize/2);
+ insw(GDROM_DATA_REG, toc, tocsize/2);
if (gd.status & 0x01)
err = -EINVAL;
@@ -449,7 +449,7 @@ static int gdrom_getsense(short *bufstring)
GDROM_DEFAULT_TIMEOUT);
if (gd.pending)
goto cleanup_sense;
- insw(PHYSADDR(GDROM_DATA_REG), &sense, sense_command->buflen/2);
+ insw(GDROM_DATA_REG, &sense, sense_command->buflen/2);
if (sense[1] & 40) {
printk(KERN_INFO "GDROM: Drive not ready - command aborted\n");
goto cleanup_sense;
@@ -586,7 +586,7 @@ static void gdrom_readdisk_dma(struct work_struct *work)
spin_unlock(&gdrom_lock);
block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET;
block_cnt = blk_rq_sectors(req)/GD_TO_BLK;
- ctrl_outl(PHYSADDR(req->buffer), GDROM_DMA_STARTADDR_REG);
+ ctrl_outl(virt_to_phys(req->buffer), GDROM_DMA_STARTADDR_REG);
ctrl_outl(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG);
ctrl_outl(1, GDROM_DMA_DIRECTION_REG);
ctrl_outl(1, GDROM_DMA_ENABLE_REG);
@@ -615,7 +615,7 @@ static void gdrom_readdisk_dma(struct work_struct *work)
cpu_relax();
gd.pending = 1;
gd.transfer = 1;
- outsw(PHYSADDR(GDROM_DATA_REG), &read_command->cmd, 6);
+ outsw(GDROM_DATA_REG, &read_command->cmd, 6);
timeout = jiffies + HZ / 2;
/* Wait for any pending DMA to finish */
while (ctrl_inb(GDROM_DMA_STATUS_REG) &&
From 913df4453f85f1fe79b35ecf3c9a0c0b707d22a2 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 13 Oct 2009 12:35:30 +0900
Subject: [PATCH 024/137] sh: maple: PHYSADDR() -> virt_to_phys() conversion.
Maple's abuse of PHYSADDR() likewise can be converted to virt_to_phys()
for its cases, although in practice this really wants explicit remapping.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/sh/maple/maple.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/sh/maple/maple.c b/drivers/sh/maple/maple.c
index 93c20e135ee1..4e8f57d4131f 100644
--- a/drivers/sh/maple/maple.c
+++ b/drivers/sh/maple/maple.c
@@ -106,7 +106,7 @@ static void maple_dma_reset(void)
* max delay is 11
*/
ctrl_outl(MAPLE_2MBPS | MAPLE_TIMEOUT(0xFFFF), MAPLE_SPEED);
- ctrl_outl(PHYSADDR(maple_sendbuf), MAPLE_DMAADDR);
+ ctrl_outl(virt_to_phys(maple_sendbuf), MAPLE_DMAADDR);
ctrl_outl(1, MAPLE_ENABLE);
}
@@ -258,7 +258,7 @@ static void maple_build_block(struct mapleq *mq)
maple_lastptr = maple_sendptr;
*maple_sendptr++ = (port << 16) | len | 0x80000000;
- *maple_sendptr++ = PHYSADDR(mq->recvbuf->buf);
+ *maple_sendptr++ = virt_to_phys(mq->recvbuf->buf);
*maple_sendptr++ =
mq->command | (to << 8) | (from << 16) | (len << 24);
while (len-- > 0)
From ac4fac8cb24ab209ae373a3e3e9995dff7d0c394 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 13 Oct 2009 13:10:14 +0900
Subject: [PATCH 025/137] sh: Generalize CALLER_ADDRx support.
This splits out the unwinder implementation and adds a new
return_address() abstraction modelled after the ARM code. The DWARF
unwinder is tied in to this, returning NULL otherwise in the case of
being unable to support arbitrary depths.
This enables us to get correct behaviour with the unwinder enabled,
as well as disabling the arbitrary depth support when frame pointers are
enabled, as arbitrary depths with __builtin_return_address() are not
supported regardless.
With this abstraction it's also possible to layer on a simplified
implementation with frame pointers in the event that the unwinder isn't
enabled, although this is left as a future exercise.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/dwarf.h | 5 +++
arch/sh/include/asm/ftrace.h | 50 +++++-------------------------
arch/sh/kernel/Makefile | 1 +
arch/sh/kernel/return_address.c | 54 +++++++++++++++++++++++++++++++++
4 files changed, 68 insertions(+), 42 deletions(-)
create mode 100644 arch/sh/kernel/return_address.c
diff --git a/arch/sh/include/asm/dwarf.h b/arch/sh/include/asm/dwarf.h
index fc51e66f2380..d985148af19f 100644
--- a/arch/sh/include/asm/dwarf.h
+++ b/arch/sh/include/asm/dwarf.h
@@ -194,6 +194,11 @@
#define DWARF_ARCH_RA_REG 17
#ifndef __ASSEMBLY__
+
+#include <linux/compiler.h>
+#include <linux/bug.h>
+#include <linux/list.h>
+
/*
* Read either the frame pointer (r14) or the stack pointer (r15).
* NOTE: this MUST be inlined.
diff --git a/arch/sh/include/asm/ftrace.h b/arch/sh/include/asm/ftrace.h
index 5ea9030725c0..28875a3e4116 100644
--- a/arch/sh/include/asm/ftrace.h
+++ b/arch/sh/include/asm/ftrace.h
@@ -32,52 +32,18 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr)
return addr;
}
-
-#ifdef CONFIG_DWARF_UNWINDER
-#include <asm/dwarf.h>
+/* arch/sh/kernel/return_address.c */
+extern void *return_address(unsigned int);
#define HAVE_ARCH_CALLER_ADDR
-static inline unsigned long dwarf_return_address(int depth)
-{
- struct dwarf_frame *frame;
- unsigned long ra;
- int i;
-
- for (i = 0, frame = NULL, ra = 0; i <= depth; i++) {
- struct dwarf_frame *tmp;
-
- tmp = dwarf_unwind_stack(ra, frame);
-
- if (frame)
- dwarf_free_frame(frame);
-
- frame = tmp;
-
- if (!frame || !frame->return_addr)
- break;
-
- ra = frame->return_addr;
- }
-
- /* Failed to unwind the stack to the specified depth. */
- WARN_ON(i != depth + 1);
-
- if (frame)
- dwarf_free_frame(frame);
-
- return ra;
-}
-
#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
-#define CALLER_ADDR1 dwarf_return_address(1)
-#define CALLER_ADDR2 dwarf_return_address(2)
-#define CALLER_ADDR3 dwarf_return_address(3)
-#define CALLER_ADDR4 dwarf_return_address(4)
-#define CALLER_ADDR5 dwarf_return_address(5)
-#define CALLER_ADDR6 dwarf_return_address(6)
-
-#endif /* CONFIG_DWARF_UNWINDER */
+#define CALLER_ADDR1 ((unsigned long)return_address(1))
+#define CALLER_ADDR2 ((unsigned long)return_address(2))
+#define CALLER_ADDR3 ((unsigned long)return_address(3))
+#define CALLER_ADDR4 ((unsigned long)return_address(4))
+#define CALLER_ADDR5 ((unsigned long)return_address(5))
+#define CALLER_ADDR6 ((unsigned long)return_address(6))
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_FUNCTION_TRACER */
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index a2d0a40f3848..18a1e279b430 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -11,6 +11,7 @@ endif
obj-y := debugtraps.o dumpstack.o idle.o io.o io_generic.o irq.o \
machvec.o nmi_debug.o process_$(BITS).o ptrace_$(BITS).o \
+ return_address.o \
setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o \
syscalls_$(BITS).o time.o topology.o traps.o \
traps_$(BITS).o unwinder.o
diff --git a/arch/sh/kernel/return_address.c b/arch/sh/kernel/return_address.c
new file mode 100644
index 000000000000..df3ab5811074
--- /dev/null
+++ b/arch/sh/kernel/return_address.c
@@ -0,0 +1,54 @@
+/*
+ * arch/sh/kernel/return_address.c
+ *
+ * Copyright (C) 2009 Matt Fleming
+ * Copyright (C) 2009 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <asm/dwarf.h>
+
+#ifdef CONFIG_DWARF_UNWINDER
+
+void *return_address(unsigned int depth)
+{
+ struct dwarf_frame *frame;
+ unsigned long ra;
+ int i;
+
+ for (i = 0, frame = NULL, ra = 0; i <= depth; i++) {
+ struct dwarf_frame *tmp;
+
+ tmp = dwarf_unwind_stack(ra, frame);
+
+ if (frame)
+ dwarf_free_frame(frame);
+
+ frame = tmp;
+
+ if (!frame || !frame->return_addr)
+ break;
+
+ ra = frame->return_addr;
+ }
+
+ /* Failed to unwind the stack to the specified depth. */
+ WARN_ON(i != depth + 1);
+
+ if (frame)
+ dwarf_free_frame(frame);
+
+ return (void *)ra;
+}
+
+#else
+
+void *return_address(unsigned int depth)
+{
+ return NULL;
+}
+
+#endif
From 5a3abba77dc0eb0b00332c21899123cdfa3b19e5 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 13 Oct 2009 13:32:19 +0900
Subject: [PATCH 026/137] sh: Tidy up the dwarf module helpers.
This enables us to build the dwarf unwinder both with modules enabled and
disabled in addition to reducing code size in the latter case. The
helpers are also consolidated, and modified to resemble the BUG module
helpers.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/dwarf.h | 11 ++++++++--
arch/sh/kernel/dwarf.c | 43 +++++++++++++++++++++++++++++++++----
arch/sh/kernel/module.c | 35 +++++-------------------------
3 files changed, 53 insertions(+), 36 deletions(-)
diff --git a/arch/sh/include/asm/dwarf.h b/arch/sh/include/asm/dwarf.h
index d985148af19f..bdccbbfdc0bd 100644
--- a/arch/sh/include/asm/dwarf.h
+++ b/arch/sh/include/asm/dwarf.h
@@ -198,6 +198,7 @@
#include <linux/compiler.h>
#include <linux/bug.h>
#include <linux/list.h>
+#include <linux/module.h>
/*
* Read either the frame pointer (r14) or the stack pointer (r15).
@@ -382,8 +383,10 @@ static inline unsigned int DW_CFA_operand(unsigned long insn)
extern struct dwarf_frame *dwarf_unwind_stack(unsigned long,
struct dwarf_frame *);
extern void dwarf_free_frame(struct dwarf_frame *);
-extern int dwarf_parse_section(char *, char *, struct module *);
-extern void dwarf_module_unload(struct module *);
+
+extern int module_dwarf_finalize(const Elf_Ehdr *, const Elf_Shdr *,
+ struct module *);
+extern void module_dwarf_cleanup(struct module *);
#endif /* !__ASSEMBLY__ */
@@ -412,6 +415,10 @@ extern void dwarf_module_unload(struct module *);
static inline void dwarf_unwinder_init(void)
{
}
+
+#define module_dwarf_finalize(hdr, sechdrs, me) (0)
+#define module_dwarf_cleanup(mod) do { } while (0)
+
#endif
#endif /* CONFIG_DWARF_UNWINDER */
diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index c274039e9c8d..718286be6648 100644
--- a/arch/sh/kernel/dwarf.c
+++ b/arch/sh/kernel/dwarf.c
@@ -20,6 +20,7 @@
#include <linux/list.h>
#include <linux/mempool.h>
#include <linux/mm.h>
+#include <linux/elf.h>
#include <asm/dwarf.h>
#include <asm/unwinder.h>
#include <asm/sections.h>
@@ -895,8 +896,8 @@ static void dwarf_unwinder_cleanup(void)
*
* Parse the information in a .eh_frame section.
*/
-int dwarf_parse_section(char *eh_frame_start, char *eh_frame_end,
- struct module *mod)
+static int dwarf_parse_section(char *eh_frame_start, char *eh_frame_end,
+ struct module *mod)
{
u32 entry_type;
void *p, *entry;
@@ -959,14 +960,47 @@ out:
return err;
}
+#ifdef CONFIG_MODULES
+int module_dwarf_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
+ struct module *me)
+{
+ unsigned int i, err;
+ unsigned long start, end;
+ char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+
+ start = end = 0;
+
+ for (i = 1; i < hdr->e_shnum; i++) {
+ /* Alloc bit cleared means "ignore it." */
+ if ((sechdrs[i].sh_flags & SHF_ALLOC)
+ && !strcmp(secstrings+sechdrs[i].sh_name, ".eh_frame")) {
+ start = sechdrs[i].sh_addr;
+ end = start + sechdrs[i].sh_size;
+ break;
+ }
+ }
+
+ /* Did we find the .eh_frame section? */
+ if (i != hdr->e_shnum) {
+ err = dwarf_parse_section((char *)start, (char *)end, me);
+ if (err) {
+ printk(KERN_WARNING "%s: failed to parse DWARF info\n",
+ me->name);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
/**
- * dwarf_module_unload - remove FDE/CIEs associated with @mod
+ * module_dwarf_cleanup - remove FDE/CIEs associated with @mod
* @mod: the module that is being unloaded
*
* Remove any FDEs and CIEs from the global lists that came from
* @mod's .eh_frame section because @mod is being unloaded.
*/
-void dwarf_module_unload(struct module *mod)
+void module_dwarf_cleanup(struct module *mod)
{
struct dwarf_fde *fde;
struct dwarf_cie *cie;
@@ -1004,6 +1038,7 @@ again_fde:
spin_unlock_irqrestore(&dwarf_fde_lock, flags);
}
+#endif /* CONFIG_MODULES */
/**
* dwarf_unwinder_init - initialise the dwarf unwinder
diff --git a/arch/sh/kernel/module.c b/arch/sh/kernel/module.c
index d297a148d16c..43adddfe4c04 100644
--- a/arch/sh/kernel/module.c
+++ b/arch/sh/kernel/module.c
@@ -146,41 +146,16 @@ int module_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
struct module *me)
{
-#ifdef CONFIG_DWARF_UNWINDER
- unsigned int i, err;
- unsigned long start, end;
- char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+ int ret = 0;
- start = end = 0;
+ ret |= module_dwarf_finalize(hdr, sechdrs, me);
+ ret |= module_bug_finalize(hdr, sechdrs, me);
- for (i = 1; i < hdr->e_shnum; i++) {
- /* Alloc bit cleared means "ignore it." */
- if ((sechdrs[i].sh_flags & SHF_ALLOC)
- && !strcmp(secstrings+sechdrs[i].sh_name, ".eh_frame")) {
- start = sechdrs[i].sh_addr;
- end = start + sechdrs[i].sh_size;
- break;
- }
- }
-
- /* Did we find the .eh_frame section? */
- if (i != hdr->e_shnum) {
- err = dwarf_parse_section((char *)start, (char *)end, me);
- if (err)
- printk(KERN_WARNING "%s: failed to parse DWARF info\n",
- me->name);
- }
-
-#endif /* CONFIG_DWARF_UNWINDER */
-
- return module_bug_finalize(hdr, sechdrs, me);
+ return ret;
}
void module_arch_cleanup(struct module *mod)
{
module_bug_cleanup(mod);
-
-#ifdef CONFIG_DWARF_UNWINDER
- dwarf_module_unload(mod);
-#endif /* CONFIG_DWARF_UNWINDER */
+ module_dwarf_cleanup(mod);
}
From c8afde7f40577b80d30aa8abcdee74c76a4b800a Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 13 Oct 2009 16:31:08 +0900
Subject: [PATCH 027/137] sh: Don't profile return_address().
This adds return_address.c to the -pg exclusion list, as this is the
building block for CALLER_ADDRx we do not want to profile this.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/Makefile | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 18a1e279b430..f8791203cfe3 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -9,6 +9,8 @@ ifdef CONFIG_FUNCTION_TRACER
CFLAGS_REMOVE_ftrace.o = -pg
endif
+CFLAGS_REMOVE_return_address.o = -pg
+
obj-y := debugtraps.o dumpstack.o idle.o io.o io_generic.o irq.o \
machvec.o nmi_debug.o process_$(BITS).o ptrace_$(BITS).o \
return_address.o \
From e4b053d96ae4e23e7023eb9f591bd7fc5c9c8cb9 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 13 Oct 2009 16:52:50 +0900
Subject: [PATCH 028/137] sh: ftrace: Make code modification NMI safe.
This cribs the x86 implementation of ftrace_nmi_enter() and friends to
make ftrace_modify_code() NMI safe, particularly on SMP configurations.
For additional notes on the problems involved, see the comment below
ftrace_call_replace().
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/Kconfig | 1 +
arch/sh/kernel/ftrace.c | 146 +++++++++++++++++++++++++++++++++++++++-
2 files changed, 146 insertions(+), 1 deletion(-)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index b940424f8ccc..5260fb55ab7f 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -38,6 +38,7 @@ config SUPERH32
select HAVE_DYNAMIC_FTRACE
select HAVE_FUNCTION_TRACE_MCOUNT_TEST
select HAVE_FTRACE_SYSCALLS
+ select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_ARCH_KGDB
select ARCH_HIBERNATION_POSSIBLE if MMU
diff --git a/arch/sh/kernel/ftrace.c b/arch/sh/kernel/ftrace.c
index 2c48e267256e..b6f41c109beb 100644
--- a/arch/sh/kernel/ftrace.c
+++ b/arch/sh/kernel/ftrace.c
@@ -62,6 +62,150 @@ static unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr)
return ftrace_replaced_code;
}
+/*
+ * Modifying code must take extra care. On an SMP machine, if
+ * the code being modified is also being executed on another CPU
+ * that CPU will have undefined results and possibly take a GPF.
+ * We use kstop_machine to stop other CPUS from exectuing code.
+ * But this does not stop NMIs from happening. We still need
+ * to protect against that. We separate out the modification of
+ * the code to take care of this.
+ *
+ * Two buffers are added: An IP buffer and a "code" buffer.
+ *
+ * 1) Put the instruction pointer into the IP buffer
+ * and the new code into the "code" buffer.
+ * 2) Wait for any running NMIs to finish and set a flag that says
+ * we are modifying code, it is done in an atomic operation.
+ * 3) Write the code
+ * 4) clear the flag.
+ * 5) Wait for any running NMIs to finish.
+ *
+ * If an NMI is executed, the first thing it does is to call
+ * "ftrace_nmi_enter". This will check if the flag is set to write
+ * and if it is, it will write what is in the IP and "code" buffers.
+ *
+ * The trick is, it does not matter if everyone is writing the same
+ * content to the code location. Also, if a CPU is executing code
+ * it is OK to write to that code location if the contents being written
+ * are the same as what exists.
+ */
+#define MOD_CODE_WRITE_FLAG (1 << 31) /* set when NMI should do the write */
+static atomic_t nmi_running = ATOMIC_INIT(0);
+static int mod_code_status; /* holds return value of text write */
+static void *mod_code_ip; /* holds the IP to write to */
+static void *mod_code_newcode; /* holds the text to write to the IP */
+
+static unsigned nmi_wait_count;
+static atomic_t nmi_update_count = ATOMIC_INIT(0);
+
+int ftrace_arch_read_dyn_info(char *buf, int size)
+{
+ int r;
+
+ r = snprintf(buf, size, "%u %u",
+ nmi_wait_count,
+ atomic_read(&nmi_update_count));
+ return r;
+}
+
+static void clear_mod_flag(void)
+{
+ int old = atomic_read(&nmi_running);
+
+ for (;;) {
+ int new = old & ~MOD_CODE_WRITE_FLAG;
+
+ if (old == new)
+ break;
+
+ old = atomic_cmpxchg(&nmi_running, old, new);
+ }
+}
+
+static void ftrace_mod_code(void)
+{
+ /*
+ * Yes, more than one CPU process can be writing to mod_code_status.
+ * (and the code itself)
+ * But if one were to fail, then they all should, and if one were
+ * to succeed, then they all should.
+ */
+ mod_code_status = probe_kernel_write(mod_code_ip, mod_code_newcode,
+ MCOUNT_INSN_SIZE);
+
+ /* if we fail, then kill any new writers */
+ if (mod_code_status)
+ clear_mod_flag();
+}
+
+void ftrace_nmi_enter(void)
+{
+ if (atomic_inc_return(&nmi_running) & MOD_CODE_WRITE_FLAG) {
+ smp_rmb();
+ ftrace_mod_code();
+ atomic_inc(&nmi_update_count);
+ }
+ /* Must have previous changes seen before executions */
+ smp_mb();
+}
+
+void ftrace_nmi_exit(void)
+{
+ /* Finish all executions before clearing nmi_running */
+ smp_mb();
+ atomic_dec(&nmi_running);
+}
+
+static void wait_for_nmi_and_set_mod_flag(void)
+{
+ if (!atomic_cmpxchg(&nmi_running, 0, MOD_CODE_WRITE_FLAG))
+ return;
+
+ do {
+ cpu_relax();
+ } while (atomic_cmpxchg(&nmi_running, 0, MOD_CODE_WRITE_FLAG));
+
+ nmi_wait_count++;
+}
+
+static void wait_for_nmi(void)
+{
+ if (!atomic_read(&nmi_running))
+ return;
+
+ do {
+ cpu_relax();
+ } while (atomic_read(&nmi_running));
+
+ nmi_wait_count++;
+}
+
+static int
+do_ftrace_mod_code(unsigned long ip, void *new_code)
+{
+ mod_code_ip = (void *)ip;
+ mod_code_newcode = new_code;
+
+ /* The buffers need to be visible before we let NMIs write them */
+ smp_mb();
+
+ wait_for_nmi_and_set_mod_flag();
+
+ /* Make sure all running NMIs have finished before we write the code */
+ smp_mb();
+
+ ftrace_mod_code();
+
+ /* Make sure the write happens before clearing the bit */
+ smp_mb();
+
+ clear_mod_flag();
+ wait_for_nmi();
+
+ return mod_code_status;
+}
+
static int ftrace_modify_code(unsigned long ip, unsigned char *old_code,
unsigned char *new_code)
{
@@ -86,7 +230,7 @@ static int ftrace_modify_code(unsigned long ip, unsigned char *old_code,
return -EINVAL;
/* replace the text with the new text */
- if (probe_kernel_write((void *)ip, new_code, MCOUNT_INSN_SIZE))
+ if (do_ftrace_mod_code(ip, new_code))
return -EPERM;
flush_icache_range(ip, ip + MCOUNT_INSN_SIZE);
From 36c871992697eaaf88a3682c2c3003a41c54b8c0 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 14 Oct 2009 11:49:49 +0900
Subject: [PATCH 029/137] sh: Provide CALLER_ADDRx definitions even when ftrace
is disabled.
Despite being located in the ftrace header, the CALLER_ADDRx definitions
are used by generic code. As such, we have to provide it generically, and
given that there is no real dependence on ftrace in the first place, the
definitions can just be moved out.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/ftrace.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/sh/include/asm/ftrace.h b/arch/sh/include/asm/ftrace.h
index 28875a3e4116..13e9966464c2 100644
--- a/arch/sh/include/asm/ftrace.h
+++ b/arch/sh/include/asm/ftrace.h
@@ -32,6 +32,11 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr)
return addr;
}
+#endif /* __ASSEMBLY__ */
+#endif /* CONFIG_FUNCTION_TRACER */
+
+#ifndef __ASSEMBLY__
+
/* arch/sh/kernel/return_address.c */
extern void *return_address(unsigned int);
@@ -46,6 +51,5 @@ extern void *return_address(unsigned int);
#define CALLER_ADDR6 ((unsigned long)return_address(6))
#endif /* __ASSEMBLY__ */
-#endif /* CONFIG_FUNCTION_TRACER */
#endif /* __ASM_SH_FTRACE_H */
From d780613acc0eeea89e1b3a7d9db765e0f2a4a950 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 14 Oct 2009 11:51:28 +0900
Subject: [PATCH 030/137] sh: Only invalidate the I-cache range for secondary
CPUs stack_start.
Secondary CPUs already take care of the D-cache bits through the common
cache initialization path, and the only thing that is necessary after
twiddling around with stack_start is ensuring that the I-cache changes
are visible (particularly since this tends to be the only part lacking
coherency).
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/smp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c
index 442d8d47a41e..6a27c657648d 100644
--- a/arch/sh/kernel/smp.c
+++ b/arch/sh/kernel/smp.c
@@ -120,7 +120,9 @@ int __cpuinit __cpu_up(unsigned int cpu)
stack_start.bss_start = 0; /* don't clear bss for secondary cpus */
stack_start.start_kernel_fn = start_secondary;
- flush_cache_all();
+ flush_icache_range((unsigned long)&stack_start,
+ (unsigned long)&stack_start + sizeof(stack_start));
+ wmb();
plat_start_cpu(cpu, (unsigned long)_stext);
From 56bfc42f6cba3e831094c01a23fbbb17a20bbdf8 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 14 Oct 2009 16:05:42 +0900
Subject: [PATCH 031/137] sh: TS_RESTORE_SIGMASK conversion.
Replace TIF_RESTORE_SIGMASK with TS_RESTORE_SIGMASK and define our own
set_restore_sigmask() function. This saves the costly SMP-safe set_bit
operation, which we do not need for the sigmask flag since TIF_SIGPENDING
always has to be set too.
Based on the x86 and powerpc change.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/thread_info.h | 26 ++++++++++++++++++++++----
arch/sh/kernel/cpu/sh5/entry.S | 2 +-
arch/sh/kernel/entry-common.S | 2 +-
arch/sh/kernel/signal_32.c | 24 ++++++++++++++----------
arch/sh/kernel/signal_64.c | 13 ++++++-------
5 files changed, 44 insertions(+), 23 deletions(-)
diff --git a/arch/sh/include/asm/thread_info.h b/arch/sh/include/asm/thread_info.h
index bdeb9d46d17d..23eeed89467a 100644
--- a/arch/sh/include/asm/thread_info.h
+++ b/arch/sh/include/asm/thread_info.h
@@ -19,6 +19,7 @@ struct thread_info {
struct task_struct *task; /* main task structure */
struct exec_domain *exec_domain; /* execution domain */
unsigned long flags; /* low level flags */
+ __u32 status; /* thread synchronous flags */
__u32 cpu;
int preempt_count; /* 0 => preemptable, <0 => BUG */
mm_segment_t addr_limit; /* thread address space */
@@ -111,7 +112,6 @@ extern void free_thread_info(struct thread_info *ti);
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
#define TIF_SIGPENDING 1 /* signal pending */
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
-#define TIF_RESTORE_SIGMASK 3 /* restore signal mask in do_signal() */
#define TIF_SINGLESTEP 4 /* singlestepping active */
#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
#define TIF_SECCOMP 6 /* secure computing */
@@ -125,7 +125,6 @@ extern void free_thread_info(struct thread_info *ti);
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
-#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
@@ -149,13 +148,32 @@ extern void free_thread_info(struct thread_info *ti);
/* work to do on any return to u-space */
#define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \
_TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \
- _TIF_SINGLESTEP | _TIF_RESTORE_SIGMASK | \
- _TIF_NOTIFY_RESUME | _TIF_SYSCALL_TRACEPOINT)
+ _TIF_SINGLESTEP | _TIF_NOTIFY_RESUME | \
+ _TIF_SYSCALL_TRACEPOINT)
/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \
_TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP))
+/*
+ * Thread-synchronous status.
+ *
+ * This is different from the flags in that nobody else
+ * ever touches our thread-synchronous status, so we don't
+ * have to worry about atomic accesses.
+ */
+#define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */
+
+#ifndef __ASSEMBLY__
+#define HAVE_SET_RESTORE_SIGMASK 1
+static inline void set_restore_sigmask(void)
+{
+ struct thread_info *ti = current_thread_info();
+ ti->status |= TS_RESTORE_SIGMASK;
+ set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags);
+}
+#endif /* !__ASSEMBLY__ */
+
#endif /* __KERNEL__ */
#endif /* __ASM_SH_THREAD_INFO_H */
diff --git a/arch/sh/kernel/cpu/sh5/entry.S b/arch/sh/kernel/cpu/sh5/entry.S
index b0aacf675258..8f13f73cb2cb 100644
--- a/arch/sh/kernel/cpu/sh5/entry.S
+++ b/arch/sh/kernel/cpu/sh5/entry.S
@@ -933,7 +933,7 @@ ret_with_reschedule:
pta restore_all, tr1
- movi (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), r8
+ movi _TIF_SIGPENDING, r8
and r8, r7, r8
pta work_notifysig, tr0
bne r8, ZERO, tr0
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index 3eb84931d2aa..f0abd58c3a69 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -133,7 +133,7 @@ work_pending:
! r8: current_thread_info
! t: result of "tst #_TIF_NEED_RESCHED, r0"
bf/s work_resched
- tst #(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), r0
+ tst #_TIF_SIGPENDING, r0
work_notifysig:
bt/s __restore_all
mov r15, r4
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index 3db37425210d..12815ce01ecd 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -67,7 +67,8 @@ sys_sigsuspend(old_sigset_t mask,
current->state = TASK_INTERRUPTIBLE;
schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
+ set_restore_sigmask();
+
return -ERESTARTNOHAND;
}
@@ -590,7 +591,7 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
if (try_to_freeze())
goto no_signal;
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ if (current_thread_info()->status & TS_RESTORE_SIGMASK)
oldset = ¤t->saved_sigmask;
else
oldset = ¤t->blocked;
@@ -602,12 +603,13 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
/* Whee! Actually deliver the signal. */
if (handle_signal(signr, &ka, &info, oldset,
regs, save_r0) == 0) {
- /* a signal was successfully delivered; the saved
+ /*
+ * A signal was successfully delivered; the saved
* sigmask will have been stored in the signal frame,
* and will be restored by sigreturn, so we can simply
- * clear the TIF_RESTORE_SIGMASK flag */
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
- clear_thread_flag(TIF_RESTORE_SIGMASK);
+ * clear the TS_RESTORE_SIGMASK flag
+ */
+ current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
tracehook_signal_handler(signr, &info, &ka, regs,
test_thread_flag(TIF_SINGLESTEP));
@@ -631,10 +633,12 @@ no_signal:
}
}
- /* if there's no signal to deliver, we just put the saved sigmask
- * back */
- if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
- clear_thread_flag(TIF_RESTORE_SIGMASK);
+ /*
+ * If there's no signal to deliver, we just put the saved sigmask
+ * back.
+ */
+ if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+ current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL);
}
}
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index 74793c80a57a..feb3dddd3192 100644
--- a/arch/sh/kernel/signal_64.c
+++ b/arch/sh/kernel/signal_64.c
@@ -101,7 +101,7 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset)
if (try_to_freeze())
goto no_signal;
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ if (current_thread_info()->status & TS_RESTORE_SIGMASK)
oldset = ¤t->saved_sigmask;
else if (!oldset)
oldset = ¤t->blocked;
@@ -115,11 +115,9 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset)
/*
* If a signal was successfully delivered, the
* saved sigmask is in its frame, and we can
- * clear the TIF_RESTORE_SIGMASK flag.
+ * clear the TS_RESTORE_SIGMASK flag.
*/
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
- clear_thread_flag(TIF_RESTORE_SIGMASK);
-
+ current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
tracehook_signal_handler(signr, &info, &ka, regs, 0);
return 1;
}
@@ -146,8 +144,8 @@ no_signal:
}
/* No signal to deliver -- put the saved sigmask back */
- if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
- clear_thread_flag(TIF_RESTORE_SIGMASK);
+ if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+ current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL);
}
@@ -176,6 +174,7 @@ sys_sigsuspend(old_sigset_t mask,
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
+ set_restore_sigmask();
regs->pc += 4; /* because sys_sigreturn decrements the pc */
if (do_signal(regs, &saveset)) {
/* pc now points at signal handler. Need to decrement
From 731ba3301de41d2ffae9dd3e0f85f7361d8ad8f4 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 14 Oct 2009 16:42:28 +0900
Subject: [PATCH 032/137] sh: Count NMIs in irq_cpustat_t.
This plugs in support for NMI counting per-CPU via irq_cpustat_t.
Modelled after the x86 implementation.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/hardirq.h | 13 ++++++++++---
arch/sh/kernel/irq.c | 8 ++++++++
arch/sh/kernel/traps.c | 2 ++
3 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/arch/sh/include/asm/hardirq.h b/arch/sh/include/asm/hardirq.h
index a5be4afa790b..48b191313a99 100644
--- a/arch/sh/include/asm/hardirq.h
+++ b/arch/sh/include/asm/hardirq.h
@@ -1,9 +1,16 @@
#ifndef __ASM_SH_HARDIRQ_H
#define __ASM_SH_HARDIRQ_H
-extern void ack_bad_irq(unsigned int irq);
-#define ack_bad_irq ack_bad_irq
+#include <linux/threads.h>
+#include <linux/irq.h>
-#include <asm-generic/hardirq.h>
+typedef struct {
+ unsigned int __softirq_pending;
+ unsigned int __nmi_count; /* arch dependent */
+} ____cacheline_aligned irq_cpustat_t;
+
+#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
+
+extern void ack_bad_irq(unsigned int irq);
#endif /* __ASM_SH_HARDIRQ_H */
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index 7cb933ba4957..11c289ecc090 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -36,7 +36,15 @@ void ack_bad_irq(unsigned int irq)
*/
static int show_other_interrupts(struct seq_file *p, int prec)
{
+ int j;
+
+ seq_printf(p, "%*s: ", prec, "NMI");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stat[j].__nmi_count);
+ seq_printf(p, " Non-maskable interrupts\n");
+
seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
+
return 0;
}
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index a8396f36bd14..d52695df2702 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -95,9 +95,11 @@ BUILD_TRAP_HANDLER(bug)
BUILD_TRAP_HANDLER(nmi)
{
+ unsigned int cpu = smp_processor_id();
TRAP_HANDLER_DECL;
nmi_enter();
+ nmi_count(cpu)++;
switch (notify_die(DIE_NMI, "NMI", regs, 0, vec & 0xff, SIGINT)) {
case NOTIFY_OK:
From 94eab0bb206443dd7480349804f64e2bba8dc6e1 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 16 Oct 2009 17:19:08 +0900
Subject: [PATCH 033/137] sh: Force boot CPU in to light sleep mode for SH-X3
SMP.
All of the secondary CPUs are forced in to light sleep mode, but we were
missing the same initialization for the boot CPU. This resulted in
inconsistent sleep modes depending on which CPU we were on, confusing the
idle loop when not polling.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4a/smp-shx3.c | 37 +++++++++++++++---------------
1 file changed, 19 insertions(+), 18 deletions(-)
diff --git a/arch/sh/kernel/cpu/sh4a/smp-shx3.c b/arch/sh/kernel/cpu/sh4a/smp-shx3.c
index 185ec3976a25..5863e0c4d02f 100644
--- a/arch/sh/kernel/cpu/sh4a/smp-shx3.c
+++ b/arch/sh/kernel/cpu/sh4a/smp-shx3.c
@@ -14,6 +14,13 @@
#include <linux/interrupt.h>
#include <linux/io.h>
+#define STBCR_REG(phys_id) (0xfe400004 | (phys_id << 12))
+#define RESET_REG(phys_id) (0xfe400008 | (phys_id << 12))
+
+#define STBCR_MSTP 0x00000001
+#define STBCR_RESET 0x00000002
+#define STBCR_LTSLP 0x80000000
+
static irqreturn_t ipi_interrupt_handler(int irq, void *arg)
{
unsigned int message = (unsigned int)(long)arg;
@@ -21,9 +28,9 @@ static irqreturn_t ipi_interrupt_handler(int irq, void *arg)
unsigned int offs = 4 * cpu;
unsigned int x;
- x = ctrl_inl(0xfe410070 + offs); /* C0INITICI..CnINTICI */
+ x = __raw_readl(0xfe410070 + offs); /* C0INITICI..CnINTICI */
x &= (1 << (message << 2));
- ctrl_outl(x, 0xfe410080 + offs); /* C0INTICICLR..CnINTICICLR */
+ __raw_writel(x, 0xfe410080 + offs); /* C0INTICICLR..CnINTICICLR */
smp_message_recv(message);
@@ -37,6 +44,9 @@ void __init plat_smp_setup(void)
init_cpu_possible(cpumask_of(cpu));
+ /* Enable light sleep for the boot CPU */
+ __raw_writel(__raw_readl(STBCR_REG(cpu)) | STBCR_LTSLP, STBCR_REG(cpu));
+
__cpu_number_map[0] = 0;
__cpu_logical_map[0] = 0;
@@ -66,32 +76,23 @@ void __init plat_prepare_cpus(unsigned int max_cpus)
"IPI", (void *)(long)i);
}
-#define STBCR_REG(phys_id) (0xfe400004 | (phys_id << 12))
-#define RESET_REG(phys_id) (0xfe400008 | (phys_id << 12))
-
-#define STBCR_MSTP 0x00000001
-#define STBCR_RESET 0x00000002
-#define STBCR_LTSLP 0x80000000
-
-#define STBCR_AP_VAL (STBCR_RESET | STBCR_LTSLP)
-
void plat_start_cpu(unsigned int cpu, unsigned long entry_point)
{
- ctrl_outl(entry_point, RESET_REG(cpu));
+ __raw_writel(entry_point, RESET_REG(cpu));
- if (!(ctrl_inl(STBCR_REG(cpu)) & STBCR_MSTP))
- ctrl_outl(STBCR_MSTP, STBCR_REG(cpu));
+ if (!(__raw_readl(STBCR_REG(cpu)) & STBCR_MSTP))
+ __raw_writel(STBCR_MSTP, STBCR_REG(cpu));
- while (!(ctrl_inl(STBCR_REG(cpu)) & STBCR_MSTP))
+ while (!(__raw_readl(STBCR_REG(cpu)) & STBCR_MSTP))
cpu_relax();
/* Start up secondary processor by sending a reset */
- ctrl_outl(STBCR_AP_VAL, STBCR_REG(cpu));
+ __raw_writel(STBCR_RESET | STBCR_LTSLP, STBCR_REG(cpu));
}
int plat_smp_processor_id(void)
{
- return ctrl_inl(0xff000048); /* CPIDR */
+ return __raw_readl(0xff000048); /* CPIDR */
}
void plat_send_ipi(unsigned int cpu, unsigned int message)
@@ -100,5 +101,5 @@ void plat_send_ipi(unsigned int cpu, unsigned int message)
BUG_ON(cpu >= 4);
- ctrl_outl(1 << (message << 2), addr); /* C0INTICI..CnINTICI */
+ __raw_writel(1 << (message << 2), addr); /* C0INTICI..CnINTICI */
}
From f533c3d340536198a4889a42a68d6c0d79a504e7 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 16 Oct 2009 17:20:58 +0900
Subject: [PATCH 034/137] sh: Idle loop chainsawing for SMP-based light sleep.
This does a bit of chainsawing of the idle loop code to get light sleep
working on SMP. Previously this was forcing secondary CPUs in to sleep
mode with them not coming back if they didn't have their own local
timers. Given that we use clockevents broadcasting by default, the CPU
managing the clockevents can't have IRQs disabled before entering its
sleep state.
This unfortunately leaves us with the age-old need_resched() race in
between local_irq_enable() and cpu_sleep(), but at present this is
unavoidable. After some more experimentation it may be possible to layer
on SR.BL bit manipulation over top of this scheme to inhibit the race
condition, but given the current potential for missing wakeups, this is
left as a future exercise.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/bugs.h | 4 ++
arch/sh/kernel/idle.c | 91 +++++++++++++++++++++++++++-----------
2 files changed, 70 insertions(+), 25 deletions(-)
diff --git a/arch/sh/include/asm/bugs.h b/arch/sh/include/asm/bugs.h
index 46260fcbdf4b..02a19a1c033a 100644
--- a/arch/sh/include/asm/bugs.h
+++ b/arch/sh/include/asm/bugs.h
@@ -14,11 +14,15 @@
#include <asm/processor.h>
+extern void select_idle_routine(void);
+
static void __init check_bugs(void)
{
extern unsigned long loops_per_jiffy;
char *p = &init_utsname()->machine[2]; /* "sh" */
+ select_idle_routine();
+
current_cpu_data.loops_per_jiffy = loops_per_jiffy;
switch (current_cpu_data.family) {
diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
index 27ff2dc093c7..8e61241230cb 100644
--- a/arch/sh/kernel/idle.c
+++ b/arch/sh/kernel/idle.c
@@ -21,7 +21,7 @@
#include <asm/atomic.h>
static int hlt_counter;
-void (*pm_idle)(void);
+void (*pm_idle)(void) = NULL;
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);
@@ -39,41 +39,68 @@ static int __init hlt_setup(char *__unused)
}
__setup("hlt", hlt_setup);
-void default_idle(void)
+static inline int hlt_works(void)
{
- if (!hlt_counter) {
- clear_thread_flag(TIF_POLLING_NRFLAG);
- smp_mb__after_clear_bit();
- set_bl_bit();
- stop_critical_timings();
-
- while (!need_resched())
- cpu_sleep();
-
- start_critical_timings();
- clear_bl_bit();
- set_thread_flag(TIF_POLLING_NRFLAG);
- } else
- while (!need_resched())
- cpu_relax();
+ return !hlt_counter;
}
+/*
+ * On SMP it's slightly faster (but much more power-consuming!)
+ * to poll the ->work.need_resched flag instead of waiting for the
+ * cross-CPU IPI to arrive. Use this option with caution.
+ */
+static void poll_idle(void)
+{
+ local_irq_enable();
+ while (!need_resched())
+ cpu_relax();
+}
+
+void default_idle(void)
+{
+ if (hlt_works()) {
+ clear_thread_flag(TIF_POLLING_NRFLAG);
+ smp_mb__after_clear_bit();
+
+ if (!need_resched()) {
+ local_irq_enable();
+ cpu_sleep();
+ }
+
+ set_thread_flag(TIF_POLLING_NRFLAG);
+ } else
+ poll_idle();
+}
+
+/*
+ * The idle thread. There's no useful work to be done, so just try to conserve
+ * power and have a low exit latency (ie sit in a loop waiting for somebody to
+ * say that they'd like to reschedule)
+ */
void cpu_idle(void)
{
+ unsigned int cpu = smp_processor_id();
+
set_thread_flag(TIF_POLLING_NRFLAG);
/* endless idle loop with no priority at all */
while (1) {
- void (*idle)(void) = pm_idle;
-
- if (!idle)
- idle = default_idle;
-
tick_nohz_stop_sched_tick(1);
- while (!need_resched())
- idle();
- tick_nohz_restart_sched_tick();
+ while (!need_resched() && cpu_online(cpu)) {
+ local_irq_disable();
+ /* Don't trace irqs off for idle */
+ stop_critical_timings();
+ pm_idle();
+ /*
+ * Sanity check to ensure that pm_idle() returns
+ * with IRQs enabled
+ */
+ WARN_ON(irqs_disabled());
+ start_critical_timings();
+ }
+
+ tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
preempt_disable();
@@ -81,6 +108,20 @@ void cpu_idle(void)
}
}
+void __cpuinit select_idle_routine(void)
+{
+ /*
+ * If a platform has set its own idle routine, leave it alone.
+ */
+ if (pm_idle)
+ return;
+
+ if (hlt_works())
+ pm_idle = default_idle;
+ else
+ pm_idle = poll_idle;
+}
+
static void do_nothing(void *unused)
{
}
From 0e6d4986e7940125a04ba8c3aa558f3b248cb9b4 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 16 Oct 2009 17:27:58 +0900
Subject: [PATCH 035/137] sh: Make check_pgt_cache() more aggressive while
idling.
This follows the x86 change and moves check_pgt_cache() up under the
!need_resched() tight loop, rather than simply calling in to it when
exiting idle.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/idle.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
index 8e61241230cb..3243eb23e842 100644
--- a/arch/sh/kernel/idle.c
+++ b/arch/sh/kernel/idle.c
@@ -88,6 +88,9 @@ void cpu_idle(void)
tick_nohz_stop_sched_tick(1);
while (!need_resched() && cpu_online(cpu)) {
+ check_pgt_cache();
+ rmb();
+
local_irq_disable();
/* Don't trace irqs off for idle */
stop_critical_timings();
@@ -104,7 +107,6 @@ void cpu_idle(void)
preempt_enable_no_resched();
schedule();
preempt_disable();
- check_pgt_cache();
}
}
From 9dbe00a56a60748668d2040cf4e59427060e2252 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 16 Oct 2009 17:55:59 +0900
Subject: [PATCH 036/137] sh: Fix up IRQ re-enabling for the need_resched()
case.
In the case where need_resched() is set in between the cpu_idle() and
pm_idle() calls we were missing an else case for just re-enabling local
IRQs and bailing out. This was noticed by the irqs_disabled() warning,
even though IRQs were being re-enabled elsewhere.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/idle.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
index 3243eb23e842..aaff0037fcd7 100644
--- a/arch/sh/kernel/idle.c
+++ b/arch/sh/kernel/idle.c
@@ -65,7 +65,8 @@ void default_idle(void)
if (!need_resched()) {
local_irq_enable();
cpu_sleep();
- }
+ } else
+ local_irq_enable();
set_thread_flag(TIF_POLLING_NRFLAG);
} else
From 896f0c0e8e4ee02ee72a203aef79f362d5f7b7cc Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 16 Oct 2009 18:00:02 +0900
Subject: [PATCH 037/137] sh: Support SCHED_MC for SH-X3 multi-cores.
This enables SCHED_MC support for SH-X3 multi-cores. Presently this is
just a simple wrapper around the possible map, but this allows for
tying in support for some of the more exotic NUMA clusters where we can
actually do something with the topology.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/topology.h | 8 ++++++++
arch/sh/kernel/topology.c | 26 ++++++++++++++++++++++++++
arch/sh/mm/Kconfig | 9 +++++++++
3 files changed, 43 insertions(+)
diff --git a/arch/sh/include/asm/topology.h b/arch/sh/include/asm/topology.h
index 65e7bd2f2240..37cdadd975ac 100644
--- a/arch/sh/include/asm/topology.h
+++ b/arch/sh/include/asm/topology.h
@@ -40,6 +40,14 @@
#endif
+#define mc_capable() (1)
+
+const struct cpumask *cpu_coregroup_mask(unsigned int cpu);
+
+extern cpumask_t cpu_core_map[NR_CPUS];
+
+#define topology_core_cpumask(cpu) (&cpu_core_map[cpu])
+
#include <asm-generic/topology.h>
#endif /* _ASM_SH_TOPOLOGY_H */
diff --git a/arch/sh/kernel/topology.c b/arch/sh/kernel/topology.c
index 0838942b7083..9b0b633b6c92 100644
--- a/arch/sh/kernel/topology.c
+++ b/arch/sh/kernel/topology.c
@@ -16,6 +16,32 @@
static DEFINE_PER_CPU(struct cpu, cpu_devices);
+cpumask_t cpu_core_map[NR_CPUS];
+
+static cpumask_t cpu_coregroup_map(unsigned int cpu)
+{
+ /*
+ * Presently all SH-X3 SMP cores are multi-cores, so just keep it
+ * simple until we have a method for determining topology..
+ */
+ return cpu_possible_map;
+}
+
+const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
+{
+ return &cpu_core_map[cpu];
+}
+
+int arch_update_cpu_topology(void)
+{
+ unsigned int cpu;
+
+ for_each_possible_cpu(cpu)
+ cpu_core_map[cpu] = cpu_coregroup_map(cpu);
+
+ return 0;
+}
+
static int __init topology_init(void)
{
int i, ret;
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index b8a9032c74be..ca02b72bf46f 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -256,6 +256,15 @@ endchoice
source "mm/Kconfig"
+config SCHED_MC
+ bool "Multi-core scheduler support"
+ depends on SMP
+ default y
+ help
+ Multi-core scheduler support improves the CPU scheduler's decision
+ making when dealing with multi-core CPU chips at a cost of slightly
+ increased overhead in some places. If unsure say N here.
+
endmenu
menu "Cache configuration"
From cae19b5902d52ff059f5df98ea993a00e5686af1 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 16 Oct 2009 18:20:42 +0900
Subject: [PATCH 038/137] sh: Kill off legacy UBC wakeup cruft.
This code was added for some ancient SH-4 solution engines with peculiar
boot ROMs that did silly things to the UBC MSTP bits. None of these have
been in the wild for years, and these days the clock framework wraps up
the MSTP bits, meaning that the UBC code is one of the few interfaces
that is stomping MSTP bits underneath the clock framework. At this point
the risks far outweigh any benefit this code provided, so just kill it
off.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/Kconfig | 11 -------
arch/sh/include/asm/ubc.h | 11 -------
arch/sh/kernel/cpu/Makefile | 1 -
arch/sh/kernel/cpu/init.c | 11 -------
arch/sh/kernel/cpu/ubc.S | 59 -------------------------------------
5 files changed, 93 deletions(-)
delete mode 100644 arch/sh/kernel/cpu/ubc.S
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 266d422991e8..2e8589a6fd2f 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -757,17 +757,6 @@ config ENTRY_OFFSET
default "0x00010000" if PAGE_SIZE_64KB
default "0x00000000"
-config UBC_WAKEUP
- bool "Wakeup UBC on startup"
- depends on CPU_SH4 && !CPU_SH4A
- help
- Selecting this option will wakeup the User Break Controller (UBC) on
- startup. Although the UBC is left in an awake state when the processor
- comes up, some boot loaders misbehave by putting the UBC to sleep in a
- power saving state, which causes issues with things like ptrace().
-
- If unsure, say N.
-
choice
prompt "Kernel command line"
optional
diff --git a/arch/sh/include/asm/ubc.h b/arch/sh/include/asm/ubc.h
index 4ca4b7717371..9bf961684431 100644
--- a/arch/sh/include/asm/ubc.h
+++ b/arch/sh/include/asm/ubc.h
@@ -60,16 +60,5 @@
#define BRCR_UBDE (1 << 0)
#endif
-#ifndef __ASSEMBLY__
-/* arch/sh/kernel/cpu/ubc.S */
-extern void ubc_sleep(void);
-
-#ifdef CONFIG_UBC_WAKEUP
-extern void ubc_wakeup(void);
-#else
-#define ubc_wakeup() do { } while (0)
-#endif
-#endif
-
#endif /* __KERNEL__ */
#endif /* __ASM_SH_UBC_H */
diff --git a/arch/sh/kernel/cpu/Makefile b/arch/sh/kernel/cpu/Makefile
index 3d6b9312dc47..d97c803719ec 100644
--- a/arch/sh/kernel/cpu/Makefile
+++ b/arch/sh/kernel/cpu/Makefile
@@ -15,7 +15,6 @@ obj-$(CONFIG_ARCH_SHMOBILE) += shmobile/
# Common interfaces.
-obj-$(CONFIG_UBC_WAKEUP) += ubc.o
obj-$(CONFIG_SH_ADC) += adc.o
obj-$(CONFIG_SH_CLK_CPG) += clock-cpg.o
diff --git a/arch/sh/kernel/cpu/init.c b/arch/sh/kernel/cpu/init.c
index e932ebef4738..580d58b94cc5 100644
--- a/arch/sh/kernel/cpu/init.c
+++ b/arch/sh/kernel/cpu/init.c
@@ -338,17 +338,6 @@ asmlinkage void __init sh_cpu_init(void)
}
#endif
- /*
- * Some brain-damaged loaders decided it would be a good idea to put
- * the UBC to sleep. This causes some issues when it comes to things
- * like PTRACE_SINGLESTEP or doing hardware watchpoints in GDB. So ..
- * we wake it up and hope that all is well.
- */
-#ifdef CONFIG_SUPERH32
- if (raw_smp_processor_id() == 0)
- ubc_wakeup();
-#endif
-
speculative_execution_init();
expmask_init();
}
diff --git a/arch/sh/kernel/cpu/ubc.S b/arch/sh/kernel/cpu/ubc.S
deleted file mode 100644
index 81923079fa12..000000000000
--- a/arch/sh/kernel/cpu/ubc.S
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * arch/sh/kernel/cpu/ubc.S
- *
- * Set of management routines for the User Break Controller (UBC)
- *
- * Copyright (C) 2002 Paul Mundt
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <linux/linkage.h>
-#include <asm/ubc.h>
-
-#define STBCR2 0xffc00010
-
-ENTRY(ubc_sleep)
- mov #0, r0
-
- mov.l 1f, r1 ! Zero out UBC_BBRA ..
- mov.w r0, @r1
-
- mov.l 2f, r1 ! .. same for BBRB ..
- mov.w r0, @r1
-
- mov.l 3f, r1 ! .. and again for BRCR.
- mov.w r0, @r1
-
- mov.w @r1, r0 ! Dummy read BRCR
-
- mov.l 4f, r1 ! Set MSTP5 in STBCR2
- mov.b @r1, r0
- or #0x01, r0
- mov.b r0, @r1
-
- mov.b @r1, r0 ! Two dummy reads ..
- mov.b @r1, r0
-
- rts
- nop
-
-ENTRY(ubc_wakeup)
- mov.l 4f, r1 ! Clear MSTP5
- mov.b @r1, r0
- and #0xfe, r0
- mov.b r0, @r1
-
- mov.b @r1, r0 ! Two more dummy reads ..
- mov.b @r1, r0
-
- rts
- nop
-
-1: .long UBC_BBRA
-2: .long UBC_BBRB
-3: .long UBC_BRCR
-4: .long STBCR2
-
From 03fdb708926d5df2d9b9e62222c1666e20caa9e3 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Sat, 17 Oct 2009 21:06:39 +0900
Subject: [PATCH 039/137] sh: Convert to asm-generic/irqflags.h.
This simplifies the irqflags support by switching over to the asm-generic
version. The necessary support functions are brought out-of-line for both
SHcompact and SHmedia instruction sets.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/irqflags.h | 31 +---------
arch/sh/include/asm/irqflags_32.h | 99 -------------------------------
arch/sh/include/asm/irqflags_64.h | 85 --------------------------
arch/sh/include/asm/system_32.h | 29 +++++++++
arch/sh/include/asm/system_64.h | 26 ++++++++
arch/sh/kernel/Makefile | 4 +-
arch/sh/kernel/irq_32.c | 57 ++++++++++++++++++
arch/sh/kernel/irq_64.c | 51 ++++++++++++++++
8 files changed, 168 insertions(+), 214 deletions(-)
delete mode 100644 arch/sh/include/asm/irqflags_32.h
delete mode 100644 arch/sh/include/asm/irqflags_64.h
create mode 100644 arch/sh/kernel/irq_32.c
create mode 100644 arch/sh/kernel/irq_64.c
diff --git a/arch/sh/include/asm/irqflags.h b/arch/sh/include/asm/irqflags.h
index 46e71da5be6b..a741153b41c2 100644
--- a/arch/sh/include/asm/irqflags.h
+++ b/arch/sh/include/asm/irqflags.h
@@ -1,34 +1,9 @@
#ifndef __ASM_SH_IRQFLAGS_H
#define __ASM_SH_IRQFLAGS_H
-#ifdef CONFIG_SUPERH32
-#include "irqflags_32.h"
-#else
-#include "irqflags_64.h"
-#endif
+#define RAW_IRQ_DISABLED 0xf0
+#define RAW_IRQ_ENABLED 0x00
-#define raw_local_save_flags(flags) \
- do { (flags) = __raw_local_save_flags(); } while (0)
-
-static inline int raw_irqs_disabled_flags(unsigned long flags)
-{
- return (flags != 0);
-}
-
-static inline int raw_irqs_disabled(void)
-{
- unsigned long flags = __raw_local_save_flags();
-
- return raw_irqs_disabled_flags(flags);
-}
-
-#define raw_local_irq_save(flags) \
- do { (flags) = __raw_local_irq_save(); } while (0)
-
-static inline void raw_local_irq_restore(unsigned long flags)
-{
- if ((flags & 0xf0) != 0xf0)
- raw_local_irq_enable();
-}
+#include <asm-generic/irqflags.h>
#endif /* __ASM_SH_IRQFLAGS_H */
diff --git a/arch/sh/include/asm/irqflags_32.h b/arch/sh/include/asm/irqflags_32.h
deleted file mode 100644
index 60218f541340..000000000000
--- a/arch/sh/include/asm/irqflags_32.h
+++ /dev/null
@@ -1,99 +0,0 @@
-#ifndef __ASM_SH_IRQFLAGS_32_H
-#define __ASM_SH_IRQFLAGS_32_H
-
-static inline void raw_local_irq_enable(void)
-{
- unsigned long __dummy0, __dummy1;
-
- __asm__ __volatile__ (
- "stc sr, %0\n\t"
- "and %1, %0\n\t"
-#ifdef CONFIG_CPU_HAS_SR_RB
- "stc r6_bank, %1\n\t"
- "or %1, %0\n\t"
-#endif
- "ldc %0, sr\n\t"
- : "=&r" (__dummy0), "=r" (__dummy1)
- : "1" (~0x000000f0)
- : "memory"
- );
-}
-
-static inline void raw_local_irq_disable(void)
-{
- unsigned long flags;
-
- __asm__ __volatile__ (
- "stc sr, %0\n\t"
- "or #0xf0, %0\n\t"
- "ldc %0, sr\n\t"
- : "=&z" (flags)
- : /* no inputs */
- : "memory"
- );
-}
-
-static inline void set_bl_bit(void)
-{
- unsigned long __dummy0, __dummy1;
-
- __asm__ __volatile__ (
- "stc sr, %0\n\t"
- "or %2, %0\n\t"
- "and %3, %0\n\t"
- "ldc %0, sr\n\t"
- : "=&r" (__dummy0), "=r" (__dummy1)
- : "r" (0x10000000), "r" (0xffffff0f)
- : "memory"
- );
-}
-
-static inline void clear_bl_bit(void)
-{
- unsigned long __dummy0, __dummy1;
-
- __asm__ __volatile__ (
- "stc sr, %0\n\t"
- "and %2, %0\n\t"
- "ldc %0, sr\n\t"
- : "=&r" (__dummy0), "=r" (__dummy1)
- : "1" (~0x10000000)
- : "memory"
- );
-}
-
-static inline unsigned long __raw_local_save_flags(void)
-{
- unsigned long flags;
-
- __asm__ __volatile__ (
- "stc sr, %0\n\t"
- "and #0xf0, %0\n\t"
- : "=&z" (flags)
- : /* no inputs */
- : "memory"
- );
-
- return flags;
-}
-
-static inline unsigned long __raw_local_irq_save(void)
-{
- unsigned long flags, __dummy;
-
- __asm__ __volatile__ (
- "stc sr, %1\n\t"
- "mov %1, %0\n\t"
- "or #0xf0, %0\n\t"
- "ldc %0, sr\n\t"
- "mov %1, %0\n\t"
- "and #0xf0, %0\n\t"
- : "=&z" (flags), "=&r" (__dummy)
- : /* no inputs */
- : "memory"
- );
-
- return flags;
-}
-
-#endif /* __ASM_SH_IRQFLAGS_32_H */
diff --git a/arch/sh/include/asm/irqflags_64.h b/arch/sh/include/asm/irqflags_64.h
deleted file mode 100644
index 88f65222c1d4..000000000000
--- a/arch/sh/include/asm/irqflags_64.h
+++ /dev/null
@@ -1,85 +0,0 @@
-#ifndef __ASM_SH_IRQFLAGS_64_H
-#define __ASM_SH_IRQFLAGS_64_H
-
-#include <cpu/registers.h>
-
-#define SR_MASK_LL 0x00000000000000f0LL
-#define SR_BL_LL 0x0000000010000000LL
-
-static inline void raw_local_irq_enable(void)
-{
- unsigned long long __dummy0, __dummy1 = ~SR_MASK_LL;
-
- __asm__ __volatile__("getcon " __SR ", %0\n\t"
- "and %0, %1, %0\n\t"
- "putcon %0, " __SR "\n\t"
- : "=&r" (__dummy0)
- : "r" (__dummy1));
-}
-
-static inline void raw_local_irq_disable(void)
-{
- unsigned long long __dummy0, __dummy1 = SR_MASK_LL;
-
- __asm__ __volatile__("getcon " __SR ", %0\n\t"
- "or %0, %1, %0\n\t"
- "putcon %0, " __SR "\n\t"
- : "=&r" (__dummy0)
- : "r" (__dummy1));
-}
-
-static inline void set_bl_bit(void)
-{
- unsigned long long __dummy0, __dummy1 = SR_BL_LL;
-
- __asm__ __volatile__("getcon " __SR ", %0\n\t"
- "or %0, %1, %0\n\t"
- "putcon %0, " __SR "\n\t"
- : "=&r" (__dummy0)
- : "r" (__dummy1));
-
-}
-
-static inline void clear_bl_bit(void)
-{
- unsigned long long __dummy0, __dummy1 = ~SR_BL_LL;
-
- __asm__ __volatile__("getcon " __SR ", %0\n\t"
- "and %0, %1, %0\n\t"
- "putcon %0, " __SR "\n\t"
- : "=&r" (__dummy0)
- : "r" (__dummy1));
-}
-
-static inline unsigned long __raw_local_save_flags(void)
-{
- unsigned long long __dummy = SR_MASK_LL;
- unsigned long flags;
-
- __asm__ __volatile__ (
- "getcon " __SR ", %0\n\t"
- "and %0, %1, %0"
- : "=&r" (flags)
- : "r" (__dummy));
-
- return flags;
-}
-
-static inline unsigned long __raw_local_irq_save(void)
-{
- unsigned long long __dummy0, __dummy1 = SR_MASK_LL;
- unsigned long flags;
-
- __asm__ __volatile__ (
- "getcon " __SR ", %1\n\t"
- "or %1, r63, %0\n\t"
- "or %1, %2, %1\n\t"
- "putcon %1, " __SR "\n\t"
- "and %0, %2, %0"
- : "=&r" (flags), "=&r" (__dummy0)
- : "r" (__dummy1));
-
- return flags;
-}
-
-#endif /* __ASM_SH_IRQFLAGS_64_H */
diff --git a/arch/sh/include/asm/system_32.h b/arch/sh/include/asm/system_32.h
index 607d413f6168..06814f5b59c7 100644
--- a/arch/sh/include/asm/system_32.h
+++ b/arch/sh/include/asm/system_32.h
@@ -232,4 +232,33 @@ asmlinkage void do_exception_error(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
struct pt_regs __regs);
+static inline void set_bl_bit(void)
+{
+ unsigned long __dummy0, __dummy1;
+
+ __asm__ __volatile__ (
+ "stc sr, %0\n\t"
+ "or %2, %0\n\t"
+ "and %3, %0\n\t"
+ "ldc %0, sr\n\t"
+ : "=&r" (__dummy0), "=r" (__dummy1)
+ : "r" (0x10000000), "r" (0xffffff0f)
+ : "memory"
+ );
+}
+
+static inline void clear_bl_bit(void)
+{
+ unsigned long __dummy0, __dummy1;
+
+ __asm__ __volatile__ (
+ "stc sr, %0\n\t"
+ "and %2, %0\n\t"
+ "ldc %0, sr\n\t"
+ : "=&r" (__dummy0), "=r" (__dummy1)
+ : "1" (~0x10000000)
+ : "memory"
+ );
+}
+
#endif /* __ASM_SH_SYSTEM_32_H */
diff --git a/arch/sh/include/asm/system_64.h b/arch/sh/include/asm/system_64.h
index 8e4a03e7966c..ab1dd917ea87 100644
--- a/arch/sh/include/asm/system_64.h
+++ b/arch/sh/include/asm/system_64.h
@@ -12,6 +12,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
+#include <cpu/registers.h>
#include <asm/processor.h>
/*
@@ -47,4 +48,29 @@ static inline reg_size_t register_align(void *val)
return (unsigned long long)(signed long long)(signed long)val;
}
+#define SR_BL_LL 0x0000000010000000LL
+
+static inline void set_bl_bit(void)
+{
+ unsigned long long __dummy0, __dummy1 = SR_BL_LL;
+
+ __asm__ __volatile__("getcon " __SR ", %0\n\t"
+ "or %0, %1, %0\n\t"
+ "putcon %0, " __SR "\n\t"
+ : "=&r" (__dummy0)
+ : "r" (__dummy1));
+
+}
+
+static inline void clear_bl_bit(void)
+{
+ unsigned long long __dummy0, __dummy1 = ~SR_BL_LL;
+
+ __asm__ __volatile__("getcon " __SR ", %0\n\t"
+ "and %0, %1, %0\n\t"
+ "putcon %0, " __SR "\n\t"
+ : "=&r" (__dummy0)
+ : "r" (__dummy1));
+}
+
#endif /* __ASM_SH_SYSTEM_64_H */
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index f8791203cfe3..6fe0fcdaf531 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -12,8 +12,8 @@ endif
CFLAGS_REMOVE_return_address.o = -pg
obj-y := debugtraps.o dumpstack.o idle.o io.o io_generic.o irq.o \
- machvec.o nmi_debug.o process_$(BITS).o ptrace_$(BITS).o \
- return_address.o \
+ irq_$(BITS).o machvec.o nmi_debug.o process_$(BITS).o \
+ ptrace_$(BITS).o return_address.o \
setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o \
syscalls_$(BITS).o time.o topology.o traps.o \
traps_$(BITS).o unwinder.o
diff --git a/arch/sh/kernel/irq_32.c b/arch/sh/kernel/irq_32.c
new file mode 100644
index 000000000000..b98a694ead31
--- /dev/null
+++ b/arch/sh/kernel/irq_32.c
@@ -0,0 +1,57 @@
+/*
+ * SHcompact irqflags support
+ *
+ * Copyright (C) 2006 - 2009 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/irqflags.h>
+#include <linux/module.h>
+
+void raw_local_irq_restore(unsigned long flags)
+{
+ unsigned long __dummy0, __dummy1;
+
+ if (flags == RAW_IRQ_DISABLED) {
+ __asm__ __volatile__ (
+ "stc sr, %0\n\t"
+ "or #0xf0, %0\n\t"
+ "ldc %0, sr\n\t"
+ : "=&z" (__dummy0)
+ : /* no inputs */
+ : "memory"
+ );
+ } else {
+ __asm__ __volatile__ (
+ "stc sr, %0\n\t"
+ "and %1, %0\n\t"
+#ifdef CONFIG_CPU_HAS_SR_RB
+ "stc r6_bank, %1\n\t"
+ "or %1, %0\n\t"
+#endif
+ "ldc %0, sr\n\t"
+ : "=&r" (__dummy0), "=r" (__dummy1)
+ : "1" (~RAW_IRQ_DISABLED)
+ : "memory"
+ );
+ }
+}
+EXPORT_SYMBOL(raw_local_irq_restore);
+
+unsigned long __raw_local_save_flags(void)
+{
+ unsigned long flags;
+
+ __asm__ __volatile__ (
+ "stc sr, %0\n\t"
+ "and #0xf0, %0\n\t"
+ : "=&z" (flags)
+ : /* no inputs */
+ : "memory"
+ );
+
+ return flags;
+}
+EXPORT_SYMBOL(__raw_local_save_flags);
diff --git a/arch/sh/kernel/irq_64.c b/arch/sh/kernel/irq_64.c
new file mode 100644
index 000000000000..09d92718c996
--- /dev/null
+++ b/arch/sh/kernel/irq_64.c
@@ -0,0 +1,51 @@
+/*
+ * SHmedia irqflags support
+ *
+ * Copyright (C) 2006 - 2009 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/irqflags.h>
+#include <linux/module.h>
+#include <cpu/registers.h>
+
+void raw_local_irq_restore(unsigned long flags)
+{
+ unsigned long long __dummy;
+
+ if (flags == RAW_IRQ_DISABLED) {
+ __asm__ __volatile__ (
+ "getcon " __SR ", %0\n\t"
+ "or %0, %1, %0\n\t"
+ "putcon %0, " __SR "\n\t"
+ : "=&r" (__dummy)
+ : "r" (RAW_IRQ_DISABLED)
+ );
+ } else {
+ __asm__ __volatile__ (
+ "getcon " __SR ", %0\n\t"
+ "and %0, %1, %0\n\t"
+ "putcon %0, " __SR "\n\t"
+ : "=&r" (__dummy)
+ : "r" (~RAW_IRQ_DISABLED)
+ );
+ }
+}
+EXPORT_SYMBOL(raw_local_irq_restore);
+
+unsigned long __raw_local_save_flags(void)
+{
+ unsigned long flags;
+
+ __asm__ __volatile__ (
+ "getcon " __SR ", %0\n\t"
+ "and %0, %1, %0"
+ : "=&r" (flags)
+ : "r" (RAW_IRQ_DISABLED)
+ );
+
+ return flags;
+}
+EXPORT_SYMBOL(__raw_local_save_flags);
From 15dfdddbf0c2be680d5d2fe2bbe3aad3dba3cf0e Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Sun, 18 Oct 2009 15:13:28 +0900
Subject: [PATCH 040/137] sh: Disable SCIF2 on the SH-X3 proto CPU.
SCIF2 and the FPU exceptions happen to share vector numbers, one in
EXPEVT and the other in INTEVT. This is a violation of the interface and
should have never made it in to silicon. On top of that, the demux hack
that was added for special dispatch is rather error prone, and introduces
more problems than it solves. Kill all of it off, and just refuse to deal
with SCIF2 outright.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh3/entry.S | 33 ----------------------------
arch/sh/kernel/cpu/sh4a/setup-shx3.c | 17 +++++++-------
arch/sh/kernel/traps_32.c | 5 -----
3 files changed, 9 insertions(+), 46 deletions(-)
diff --git a/arch/sh/kernel/cpu/sh3/entry.S b/arch/sh/kernel/cpu/sh3/entry.S
index bb407ef0b91e..3f7e2a22c7c2 100644
--- a/arch/sh/kernel/cpu/sh3/entry.S
+++ b/arch/sh/kernel/cpu/sh3/entry.S
@@ -297,41 +297,8 @@ ENTRY(vbr_base)
!
.balign 256,0,256
general_exception:
-#ifndef CONFIG_CPU_SUBTYPE_SHX3
bra handle_exception
sts pr, k3 ! save original pr value in k3
-#else
- mov.l 1f, k4
- mov.l @k4, k4
-
- ! Is EXPEVT larger than 0x800?
- mov #0x8, k0
- shll8 k0
- cmp/hs k0, k4
- bf 0f
-
- ! then add 0x580 (k2 is 0xd80 or 0xda0)
- mov #0x58, k0
- shll2 k0
- shll2 k0
- add k0, k4
-0:
- ! Setup stack and save DSP context (k0 contains original r15 on return)
- bsr prepare_stack
- nop
-
- ! Save registers / Switch to bank 0
- mov k4, k2 ! keep vector in k2
- mov.l 1f, k4 ! SR bits to clear in k4
- bsr save_regs ! needs original pr value in k3
- nop
-
- bra handle_exception_special
- nop
-
- .align 2
-1: .long EXPEVT
-#endif
! prepare_stack()
! - roll back gRB
diff --git a/arch/sh/kernel/cpu/sh4a/setup-shx3.c b/arch/sh/kernel/cpu/sh4a/setup-shx3.c
index 485330cf8549..c7ba9166e18a 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-shx3.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-shx3.c
@@ -15,6 +15,15 @@
#include <linux/sh_timer.h>
#include <asm/mmzone.h>
+/*
+ * This intentionally only registers SCIF ports 0, 1, and 3. SCIF 2
+ * INTEVT values overlap with the FPU EXPEVT ones, requiring special
+ * demuxing in the exception dispatch path.
+ *
+ * As this overlap is something that never should have made it in to
+ * silicon in the first place, we just refuse to deal with the port at
+ * all rather than adding infrastructure to hack around it.
+ */
static struct plat_sci_port sci_platform_data[] = {
{
.mapbase = 0xffc30000,
@@ -26,11 +35,6 @@ static struct plat_sci_port sci_platform_data[] = {
.flags = UPF_BOOT_AUTOCONF,
.type = PORT_SCIF,
.irqs = { 44, 45, 47, 46 },
- }, {
- .mapbase = 0xffc50000,
- .flags = UPF_BOOT_AUTOCONF,
- .type = PORT_SCIF,
- .irqs = { 48, 49, 51, 50 },
}, {
.mapbase = 0xffc60000,
.flags = UPF_BOOT_AUTOCONF,
@@ -313,8 +317,6 @@ static struct intc_vect vectors[] __initdata = {
INTC_VECT(SCIF0_BRI, 0x740), INTC_VECT(SCIF0_TXI, 0x760),
INTC_VECT(SCIF1_ERI, 0x780), INTC_VECT(SCIF1_RXI, 0x7a0),
INTC_VECT(SCIF1_BRI, 0x7c0), INTC_VECT(SCIF1_TXI, 0x7e0),
- INTC_VECT(SCIF2_ERI, 0x800), INTC_VECT(SCIF2_RXI, 0x820),
- INTC_VECT(SCIF2_BRI, 0x840), INTC_VECT(SCIF2_TXI, 0x860),
INTC_VECT(SCIF3_ERI, 0x880), INTC_VECT(SCIF3_RXI, 0x8a0),
INTC_VECT(SCIF3_BRI, 0x8c0), INTC_VECT(SCIF3_TXI, 0x8e0),
INTC_VECT(DMAC0_DMINT0, 0x900), INTC_VECT(DMAC0_DMINT1, 0x920),
@@ -355,7 +357,6 @@ static struct intc_group groups[] __initdata = {
INTC_GROUP(PCII56789, PCII5, PCII6, PCII7, PCII8, PCII9),
INTC_GROUP(SCIF0, SCIF0_ERI, SCIF0_RXI, SCIF0_BRI, SCIF0_TXI),
INTC_GROUP(SCIF1, SCIF1_ERI, SCIF1_RXI, SCIF1_BRI, SCIF1_TXI),
- INTC_GROUP(SCIF2, SCIF2_ERI, SCIF2_RXI, SCIF2_BRI, SCIF2_TXI),
INTC_GROUP(SCIF3, SCIF3_ERI, SCIF3_RXI, SCIF3_BRI, SCIF3_TXI),
INTC_GROUP(DMAC0, DMAC0_DMINT0, DMAC0_DMINT1, DMAC0_DMINT2,
DMAC0_DMINT3, DMAC0_DMINT4, DMAC0_DMINT5, DMAC0_DMAE),
diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index 7a2ee3a6b8e7..114d21761823 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -945,14 +945,9 @@ void __init trap_init(void)
set_exception_table_evt(0x800, do_reserved_inst);
set_exception_table_evt(0x820, do_illegal_slot_inst);
#elif defined(CONFIG_SH_FPU)
-#ifdef CONFIG_CPU_SUBTYPE_SHX3
- set_exception_table_evt(0xd80, fpu_state_restore_trap_handler);
- set_exception_table_evt(0xda0, fpu_state_restore_trap_handler);
-#else
set_exception_table_evt(0x800, fpu_state_restore_trap_handler);
set_exception_table_evt(0x820, fpu_state_restore_trap_handler);
#endif
-#endif
#ifdef CONFIG_CPU_SH2
set_exception_table_vec(TRAP_ADDRESS_ERROR, address_error_trap_handler);
From 1c8db713e21c82e14d0d1be14a09dae224472396 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Sun, 18 Oct 2009 15:36:02 +0900
Subject: [PATCH 041/137] sh: Fix up smp_mb__xxx() memory barriers for SH-4A
SMP.
In the past these were simply wrapping to barrier() which was sufficient
on SH SMP platforms predating SH-4A. Unfortunately due to ll/sc semantics
an explicit synco is needed in these cases, which is sorted for us by
just switching these over to smp_mb(). smp_mb() also has the benefit of
being wrapped to barrier() in the UP and non-SH4A cases, so old behaviour
is maintained for those parts.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/atomic.h | 9 ++++-----
arch/sh/include/asm/bitops.h | 4 ++--
2 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/arch/sh/include/asm/atomic.h b/arch/sh/include/asm/atomic.h
index e8e78137c6f5..b16388d71954 100644
--- a/arch/sh/include/asm/atomic.h
+++ b/arch/sh/include/asm/atomic.h
@@ -78,11 +78,10 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
-/* Atomic operations are already serializing on SH */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
+#define smp_mb__before_atomic_dec() smp_mb()
+#define smp_mb__after_atomic_dec() smp_mb()
+#define smp_mb__before_atomic_inc() smp_mb()
+#define smp_mb__after_atomic_inc() smp_mb()
#include <asm-generic/atomic-long.h>
#include <asm-generic/atomic64.h>
diff --git a/arch/sh/include/asm/bitops.h b/arch/sh/include/asm/bitops.h
index ebe595b7ab1f..98511e4d28cb 100644
--- a/arch/sh/include/asm/bitops.h
+++ b/arch/sh/include/asm/bitops.h
@@ -26,8 +26,8 @@
/*
* clear_bit() doesn't provide any barrier for the compiler.
*/
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
+#define smp_mb__before_clear_bit() smp_mb()
+#define smp_mb__after_clear_bit() smp_mb()
#ifdef CONFIG_SUPERH32
static inline unsigned long ffz(unsigned long word)
From eca28e3764e301fad662743d1e8ba7296cc6a109 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 19 Oct 2009 15:51:21 +0900
Subject: [PATCH 042/137] sh: Fix up uninitialized variable warning in dwarf
unwinder.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/dwarf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index 718286be6648..4d8c7bd149df 100644
--- a/arch/sh/kernel/dwarf.c
+++ b/arch/sh/kernel/dwarf.c
@@ -902,7 +902,7 @@ static int dwarf_parse_section(char *eh_frame_start, char *eh_frame_end,
u32 entry_type;
void *p, *entry;
int count, err = 0;
- unsigned long len;
+ unsigned long len = 0;
unsigned int c_entries, f_entries;
unsigned char *end;
From 14c011deb4cb906d72b6b2b6880e21c3cc110fcc Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 19 Oct 2009 15:52:20 +0900
Subject: [PATCH 043/137] sh: Fix up cacheflush routine symbol exports.
Fixes up flush_dcache_page() references by modules with run-time cache
disabling.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/sh_ksyms_32.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/arch/sh/kernel/sh_ksyms_32.c b/arch/sh/kernel/sh_ksyms_32.c
index 86c270428357..8663c7a49ac7 100644
--- a/arch/sh/kernel/sh_ksyms_32.c
+++ b/arch/sh/kernel/sh_ksyms_32.c
@@ -94,13 +94,10 @@ DECLARE_EXPORT(__udivsi3_i4);
DECLARE_EXPORT(__sdivsi3_i4i);
DECLARE_EXPORT(__udivsi3_i4i);
-#if !defined(CONFIG_CACHE_OFF) && (defined(CONFIG_CPU_SH4) || \
- defined(CONFIG_SH7705_CACHE_32KB))
/* needed by some modules */
EXPORT_SYMBOL(flush_cache_all);
EXPORT_SYMBOL(flush_cache_range);
EXPORT_SYMBOL(flush_dcache_page);
-#endif
#ifdef CONFIG_MCOUNT
DECLARE_EXPORT(mcount);
From 73c926bee0e4b7739bbb992a0a3df561178dd522 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 20 Oct 2009 12:55:56 +0900
Subject: [PATCH 044/137] sh: Convert to asm-generic/dma-mapping-common.h
This converts the old DMA mapping support to the new generic
dma-mapping-common.h abstraction.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/Kconfig | 1 +
arch/sh/include/asm/dma-mapping.h | 200 ++++--------------------------
arch/sh/include/asm/pci.h | 10 +-
arch/sh/kernel/Makefile | 3 +-
arch/sh/kernel/dma-nommu.c | 76 ++++++++++++
arch/sh/mm/consistent.c | 6 +
6 files changed, 112 insertions(+), 184 deletions(-)
create mode 100644 arch/sh/kernel/dma-nommu.c
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 2e8589a6fd2f..2d3a69993858 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -16,6 +16,7 @@ config SUPERH
select HAVE_IOREMAP_PROT if MMU
select HAVE_ARCH_TRACEHOOK
select HAVE_DMA_API_DEBUG
+ select HAVE_DMA_ATTRS
select HAVE_PERF_EVENTS
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_BZIP2
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
index 69d56dd4c968..b9a8f18f35a2 100644
--- a/arch/sh/include/asm/dma-mapping.h
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -1,21 +1,32 @@
#ifndef __ASM_SH_DMA_MAPPING_H
#define __ASM_SH_DMA_MAPPING_H
-#include <linux/mm.h>
-#include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
-#include <asm/cacheflush.h>
-#include <asm/io.h>
-#include <asm-generic/dma-coherent.h>
+extern struct dma_map_ops *dma_ops;
+extern void no_iommu_init(void);
-extern struct bus_type pci_bus_type;
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+ return dma_ops;
+}
-#define dma_supported(dev, mask) (1)
+static inline int dma_supported(struct device *dev, u64 mask)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ if (ops->dma_supported)
+ return ops->dma_supported(dev, mask);
+
+ return 1;
+}
static inline int dma_set_mask(struct device *dev, u64 mask)
{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
if (!dev->dma_mask || !dma_supported(dev, mask))
return -EIO;
+ if (ops->set_dma_mask)
+ return ops->set_dma_mask(dev, mask);
*dev->dma_mask = mask;
@@ -35,160 +46,6 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
#define dma_is_consistent(d, h) (1)
-static inline dma_addr_t dma_map_single(struct device *dev,
- void *ptr, size_t size,
- enum dma_data_direction dir)
-{
- dma_addr_t addr = virt_to_phys(ptr);
-
-#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
- if (dev->bus == &pci_bus_type)
- return addr;
-#endif
- dma_cache_sync(dev, ptr, size, dir);
-
- debug_dma_map_page(dev, virt_to_page(ptr),
- (unsigned long)ptr & ~PAGE_MASK, size,
- dir, addr, true);
-
- return addr;
-}
-
-static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
- size_t size, enum dma_data_direction dir)
-{
- debug_dma_unmap_page(dev, addr, size, dir, true);
-}
-
-static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir)
-{
- int i;
-
- for (i = 0; i < nents; i++) {
-#if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
- dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
-#endif
- sg[i].dma_address = sg_phys(&sg[i]);
- sg[i].dma_length = sg[i].length;
- }
-
- debug_dma_map_sg(dev, sg, nents, i, dir);
-
- return nents;
-}
-
-static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir)
-{
- debug_dma_unmap_sg(dev, sg, nents, dir);
-}
-
-static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir)
-{
- return dma_map_single(dev, page_address(page) + offset, size, dir);
-}
-
-static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
- size_t size, enum dma_data_direction dir)
-{
- dma_unmap_single(dev, dma_address, size, dir);
-}
-
-static inline void __dma_sync_single(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction dir)
-{
-#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
- if (dev->bus == &pci_bus_type)
- return;
-#endif
- dma_cache_sync(dev, phys_to_virt(dma_handle), size, dir);
-}
-
-static inline void dma_sync_single_range(struct device *dev,
- dma_addr_t dma_handle,
- unsigned long offset, size_t size,
- enum dma_data_direction dir)
-{
-#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
- if (dev->bus == &pci_bus_type)
- return;
-#endif
- dma_cache_sync(dev, phys_to_virt(dma_handle) + offset, size, dir);
-}
-
-static inline void __dma_sync_sg(struct device *dev, struct scatterlist *sg,
- int nelems, enum dma_data_direction dir)
-{
- int i;
-
- for (i = 0; i < nelems; i++) {
-#if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
- dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
-#endif
- sg[i].dma_address = sg_phys(&sg[i]);
- sg[i].dma_length = sg[i].length;
- }
-}
-
-static inline void dma_sync_single_for_cpu(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction dir)
-{
- __dma_sync_single(dev, dma_handle, size, dir);
- debug_dma_sync_single_for_cpu(dev, dma_handle, size, dir);
-}
-
-static inline void dma_sync_single_for_device(struct device *dev,
- dma_addr_t dma_handle,
- size_t size,
- enum dma_data_direction dir)
-{
- __dma_sync_single(dev, dma_handle, size, dir);
- debug_dma_sync_single_for_device(dev, dma_handle, size, dir);
-}
-
-static inline void dma_sync_single_range_for_cpu(struct device *dev,
- dma_addr_t dma_handle,
- unsigned long offset,
- size_t size,
- enum dma_data_direction direction)
-{
- dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
- debug_dma_sync_single_range_for_cpu(dev, dma_handle,
- offset, size, direction);
-}
-
-static inline void dma_sync_single_range_for_device(struct device *dev,
- dma_addr_t dma_handle,
- unsigned long offset,
- size_t size,
- enum dma_data_direction direction)
-{
- dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
- debug_dma_sync_single_range_for_device(dev, dma_handle,
- offset, size, direction);
-}
-
-
-static inline void dma_sync_sg_for_cpu(struct device *dev,
- struct scatterlist *sg, int nelems,
- enum dma_data_direction dir)
-{
- __dma_sync_sg(dev, sg, nelems, dir);
- debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
-}
-
-static inline void dma_sync_sg_for_device(struct device *dev,
- struct scatterlist *sg, int nelems,
- enum dma_data_direction dir)
-{
- __dma_sync_sg(dev, sg, nelems, dir);
- debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
-}
-
static inline int dma_get_cache_alignment(void)
{
/*
@@ -200,20 +57,15 @@ static inline int dma_get_cache_alignment(void)
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ if (ops->mapping_error)
+ return ops->mapping_error(dev, dma_addr);
+
return dma_addr == 0;
}
-#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
-
-extern int
-dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
- dma_addr_t device_addr, size_t size, int flags);
-
-extern void
-dma_release_declared_memory(struct device *dev);
-
-extern void *
-dma_mark_declared_memory_occupied(struct device *dev,
- dma_addr_t device_addr, size_t size);
+#include <asm-generic/dma-coherent.h>
+#include <asm-generic/dma-mapping-common.h>
#endif /* __ASM_SH_DMA_MAPPING_H */
diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h
index 4163950cd1c6..6bf276b4f85d 100644
--- a/arch/sh/include/asm/pci.h
+++ b/arch/sh/include/asm/pci.h
@@ -3,8 +3,6 @@
#ifdef __KERNEL__
-#include <linux/dma-mapping.h>
-
/* Can be used to override the logic in pci_scan_bus for skipping
already-configured bus numbers - to be used for buggy BIOSes
or architectures with incomplete PCI setup by the loader */
@@ -54,13 +52,7 @@ static inline void pcibios_penalize_isa_irq(int irq, int active)
* address space. The networking and block device layers use
* this boolean for bounce buffer decisions.
*/
-#define PCI_DMA_BUS_IS_PHYS (1)
-
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <asm/scatterlist.h>
-#include <linux/string.h>
-#include <asm/io.h>
+#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
/* pci_unmap_{single,page} being a nop depends upon the
* configuration.
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 6fe0fcdaf531..097ae5ceb0e3 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -11,7 +11,8 @@ endif
CFLAGS_REMOVE_return_address.o = -pg
-obj-y := debugtraps.o dumpstack.o idle.o io.o io_generic.o irq.o \
+obj-y := debugtraps.o dma-nommu.o dumpstack.o \
+ idle.o io.o io_generic.o irq.o \
irq_$(BITS).o machvec.o nmi_debug.o process_$(BITS).o \
ptrace_$(BITS).o return_address.o \
setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o \
diff --git a/arch/sh/kernel/dma-nommu.c b/arch/sh/kernel/dma-nommu.c
new file mode 100644
index 000000000000..e88fcebf860c
--- /dev/null
+++ b/arch/sh/kernel/dma-nommu.c
@@ -0,0 +1,76 @@
+/*
+ * DMA mapping support for platforms lacking IOMMUs.
+ *
+ * Copyright (C) 2009 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+
+static dma_addr_t nommu_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ dma_addr_t addr = page_to_phys(page) + offset;
+
+ WARN_ON(size == 0);
+ dma_cache_sync(dev, page_address(page) + offset, size, dir);
+
+ return addr;
+}
+
+static int nommu_map_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ struct scatterlist *s;
+ int i;
+
+ WARN_ON(nents == 0 || sg[0].length == 0);
+
+ for_each_sg(sg, s, nents, i) {
+ BUG_ON(!sg_page(s));
+
+ dma_cache_sync(dev, sg_virt(s), s->length, dir);
+
+ s->dma_address = sg_phys(s);
+ s->dma_length = s->length;
+ }
+
+ return nents;
+}
+
+static void nommu_sync_single(struct device *dev, dma_addr_t addr,
+ size_t size, enum dma_data_direction dir)
+{
+ dma_cache_sync(dev, phys_to_virt(addr), size, dir);
+}
+
+static void nommu_sync_sg(struct device *dev, struct scatterlist *sg,
+ int nelems, enum dma_data_direction dir)
+{
+ struct scatterlist *s;
+ int i;
+
+ for_each_sg(sg, s, nelems, i)
+ dma_cache_sync(dev, sg_virt(s), s->length, dir);
+}
+
+struct dma_map_ops nommu_dma_ops = {
+ .map_page = nommu_map_page,
+ .map_sg = nommu_map_sg,
+ .sync_single_for_device = nommu_sync_single,
+ .sync_sg_for_device = nommu_sync_sg,
+ .is_phys = 1,
+};
+
+void __init no_iommu_init(void)
+{
+ if (dma_ops)
+ return;
+ dma_ops = &nommu_dma_ops;
+}
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index 9a8403d9344b..1165161e472c 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -15,14 +15,20 @@
#include <linux/dma-mapping.h>
#include <linux/dma-debug.h>
#include <linux/io.h>
+#include <linux/module.h>
#include <asm/cacheflush.h>
#include <asm/addrspace.h>
#define PREALLOC_DMA_DEBUG_ENTRIES 4096
+struct dma_map_ops *dma_ops;
+EXPORT_SYMBOL(dma_ops);
+
static int __init dma_init(void)
{
dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
+
+ no_iommu_init();
return 0;
}
fs_initcall(dma_init);
From f32154c9b580f11017b01bf093514c900c09364e Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 26 Oct 2009 09:50:51 +0900
Subject: [PATCH 045/137] sh: Add dma-mapping support for
dma_alloc/free_coherent() overrides.
This moves the current dma_alloc/free_coherent() calls to a generic
variant and plugs them in for the nommu default. Other variants can
override the defaults in the dma mapping ops directly.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/dma-mapping.h | 48 +++++++++++++++++++++++++------
arch/sh/kernel/dma-nommu.c | 2 ++
arch/sh/mm/consistent.c | 22 ++++----------
3 files changed, 47 insertions(+), 25 deletions(-)
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
index b9a8f18f35a2..653076018df0 100644
--- a/arch/sh/include/asm/dma-mapping.h
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -9,6 +9,9 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
return dma_ops;
}
+#include <asm-generic/dma-coherent.h>
+#include <asm-generic/dma-mapping-common.h>
+
static inline int dma_supported(struct device *dev, u64 mask)
{
struct dma_map_ops *ops = get_dma_ops(dev);
@@ -33,12 +36,6 @@ static inline int dma_set_mask(struct device *dev, u64 mask)
return 0;
}
-void *dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag);
-
-void dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle);
-
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir);
@@ -65,7 +62,42 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
return dma_addr == 0;
}
-#include <asm-generic/dma-coherent.h>
-#include <asm-generic/dma-mapping-common.h>
+static inline void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ void *memory;
+
+ if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
+ return memory;
+ if (!ops->alloc_coherent)
+ return NULL;
+
+ memory = ops->alloc_coherent(dev, size, dma_handle, gfp);
+ debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
+
+ return memory;
+}
+
+static inline void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ WARN_ON(irqs_disabled()); /* for portability */
+
+ if (dma_release_from_coherent(dev, get_order(size), vaddr))
+ return;
+
+ debug_dma_free_coherent(dev, size, vaddr, dma_handle);
+ if (ops->free_coherent)
+ ops->free_coherent(dev, size, vaddr, dma_handle);
+}
+
+/* arch/sh/mm/consistent.c */
+extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_addr, gfp_t flag);
+extern void dma_generic_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle);
#endif /* __ASM_SH_DMA_MAPPING_H */
diff --git a/arch/sh/kernel/dma-nommu.c b/arch/sh/kernel/dma-nommu.c
index e88fcebf860c..b336fcf40f12 100644
--- a/arch/sh/kernel/dma-nommu.c
+++ b/arch/sh/kernel/dma-nommu.c
@@ -61,6 +61,8 @@ static void nommu_sync_sg(struct device *dev, struct scatterlist *sg,
}
struct dma_map_ops nommu_dma_ops = {
+ .alloc_coherent = dma_generic_alloc_coherent,
+ .free_coherent = dma_generic_free_coherent,
.map_page = nommu_map_page,
.map_sg = nommu_map_sg,
.sync_single_for_device = nommu_sync_single,
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index 1165161e472c..ef20bbabefa0 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -33,15 +33,12 @@ static int __init dma_init(void)
}
fs_initcall(dma_init);
-void *dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp)
+void *dma_generic_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp)
{
void *ret, *ret_nocache;
int order = get_order(size);
- if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
- return ret;
-
ret = (void *)__get_free_pages(gfp, order);
if (!ret)
return NULL;
@@ -63,30 +60,21 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
*dma_handle = virt_to_phys(ret);
- debug_dma_alloc_coherent(dev, size, *dma_handle, ret_nocache);
-
return ret_nocache;
}
-EXPORT_SYMBOL(dma_alloc_coherent);
-void dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle)
+void dma_generic_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
{
int order = get_order(size);
unsigned long pfn = dma_handle >> PAGE_SHIFT;
int k;
- WARN_ON(irqs_disabled()); /* for portability */
-
- if (dma_release_from_coherent(dev, order, vaddr))
- return;
-
- debug_dma_free_coherent(dev, size, vaddr, dma_handle);
for (k = 0; k < (1 << order); k++)
__free_pages(pfn_to_page(pfn + k), 0);
+
iounmap(vaddr);
}
-EXPORT_SYMBOL(dma_free_coherent);
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
From a87d563873a6f1ee98233b57af665f2d0fc90ebb Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 2 Oct 2009 02:22:09 +0000
Subject: [PATCH 046/137] mfd: Add SuperH Mobile SDHI platform driver
This patch adds an MFD driver for the SuperH Mobile SDHI
hardware block. At this point the driver simply wraps the
tmio-mmc driver with some clock code. In the future this
driver is the place to put SDHI specific hotplug code.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/mfd/Kconfig | 8 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/sh_mobile_sdhi.c | 145 +++++++++++++++++++++++++++++++++++
3 files changed, 154 insertions(+)
create mode 100644 drivers/mfd/sh_mobile_sdhi.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 570be139f9df..96956b3cc178 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -35,6 +35,14 @@ config MFD_ASIC3
This driver supports the ASIC3 multifunction chip found on many
PDAs (mainly iPAQ and HTC based ones)
+config MFD_SH_MOBILE_SDHI
+ bool "Support for SuperH Mobile SDHI"
+ depends on SUPERH
+ select MFD_CORE
+ ---help---
+ This driver supports the SDHI hardware block found in many
+ SuperH Mobile SoCs.
+
config MFD_DM355EVM_MSP
bool "DaVinci DM355 EVM microcontroller"
depends on I2C && MACH_DAVINCI_DM355_EVM
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index f3b277b90d40..d9522943d2fb 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -4,6 +4,7 @@
obj-$(CONFIG_MFD_SM501) += sm501.o
obj-$(CONFIG_MFD_ASIC3) += asic3.o
+obj-$(CONFIG_MFD_SH_MOBILE_SDHI) += sh_mobile_sdhi.o
obj-$(CONFIG_HTC_EGPIO) += htc-egpio.o
obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o
diff --git a/drivers/mfd/sh_mobile_sdhi.c b/drivers/mfd/sh_mobile_sdhi.c
new file mode 100644
index 000000000000..56f72cc1d569
--- /dev/null
+++ b/drivers/mfd/sh_mobile_sdhi.c
@@ -0,0 +1,145 @@
+/*
+ * SuperH Mobile SDHI
+ *
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on "Compaq ASIC3 support":
+ *
+ * Copyright 2001 Compaq Computer Corporation.
+ * Copyright 2004-2005 Phil Blundell
+ * Copyright 2007-2008 OpenedHand Ltd.
+ *
+ * Authors: Phil Blundell <pb@handhelds.org>,
+ * Samuel Ortiz <sameo@openedhand.com>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/tmio.h>
+
+struct sh_mobile_sdhi {
+ struct clk *clk;
+ struct tmio_mmc_data mmc_data;
+ struct mfd_cell cell_mmc;
+};
+
+static struct resource sh_mobile_sdhi_resources[] = {
+ {
+ .start = 0x000,
+ .end = 0x1ff,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct mfd_cell sh_mobile_sdhi_cell = {
+ .name = "tmio-mmc",
+ .num_resources = ARRAY_SIZE(sh_mobile_sdhi_resources),
+ .resources = sh_mobile_sdhi_resources,
+};
+
+static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
+{
+ struct sh_mobile_sdhi *priv;
+ struct resource *mem;
+ char clk_name[8];
+ int ret, irq;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem)
+ dev_err(&pdev->dev, "missing MEM resource\n");
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ dev_err(&pdev->dev, "missing IRQ resource\n");
+
+ if (!mem || (irq < 0))
+ return -EINVAL;
+
+ priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
+ if (priv == NULL) {
+ dev_err(&pdev->dev, "kzalloc failed\n");
+ return -ENOMEM;
+ }
+
+ snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
+ priv->clk = clk_get(&pdev->dev, clk_name);
+ if (IS_ERR(priv->clk)) {
+ dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
+ ret = PTR_ERR(priv->clk);
+ kfree(priv);
+ return ret;
+ }
+
+ clk_enable(priv->clk);
+
+ /* FIXME: silly const unsigned int hclk */
+ *(unsigned int *)&priv->mmc_data.hclk = clk_get_rate(priv->clk);
+
+ memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
+ priv->cell_mmc.driver_data = &priv->mmc_data;
+ priv->cell_mmc.platform_data = &priv->cell_mmc;
+ priv->cell_mmc.data_size = sizeof(priv->cell_mmc);
+
+ platform_set_drvdata(pdev, priv);
+
+ ret = mfd_add_devices(&pdev->dev, pdev->id,
+ &priv->cell_mmc, 1, mem, irq);
+ if (ret) {
+ clk_disable(priv->clk);
+ clk_put(priv->clk);
+ kfree(priv);
+ }
+
+ return ret;
+}
+
+static int sh_mobile_sdhi_remove(struct platform_device *pdev)
+{
+ struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev);
+
+ mfd_remove_devices(&pdev->dev);
+ clk_disable(priv->clk);
+ clk_put(priv->clk);
+ kfree(priv);
+
+ return 0;
+}
+
+static struct platform_driver sh_mobile_sdhi_driver = {
+ .driver = {
+ .name = "sh_mobile_sdhi",
+ .owner = THIS_MODULE,
+ },
+ .probe = sh_mobile_sdhi_probe,
+ .remove = __devexit_p(sh_mobile_sdhi_remove),
+};
+
+static int __init sh_mobile_sdhi_init(void)
+{
+ return platform_driver_register(&sh_mobile_sdhi_driver);
+}
+
+static void __exit sh_mobile_sdhi_exit(void)
+{
+ platform_driver_unregister(&sh_mobile_sdhi_driver);
+}
+
+module_init(sh_mobile_sdhi_init);
+module_exit(sh_mobile_sdhi_exit);
+
+MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL v2");
From 6d522b05984404d6c22cc5dfd2c989bbcf3df8c9 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 2 Oct 2009 02:22:21 +0000
Subject: [PATCH 047/137] mmc: Add SuperH to the tmio-mmc Kconfig
Add SUPERH to the Kconfig dependencies for tmio_mmc.
This change allows us to drive the SDHI hardware blocks
found in SuperH Mobile with tmio_mmc.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/mmc/host/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 432ae8358c86..e04b751680d0 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -329,7 +329,7 @@ config MMC_SDRICOH_CS
config MMC_TMIO
tristate "Toshiba Mobile IO Controller (TMIO) MMC/SD function support"
- depends on MFD_TMIO || MFD_ASIC3
+ depends on MFD_TMIO || MFD_ASIC3 || SUPERH
help
This provides support for the SD/MMC cell found in TC6393XB,
T7L66XB and also HTC ASIC3
From 2e3fc56c8d42ef7e0040a61f55295e3826c9d7b2 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 2 Oct 2009 02:22:43 +0000
Subject: [PATCH 048/137] sh: SDHI platform data to the Migo-R board
Convert the Migo-R board to use sh_mobile_sdhi for the
SD Card connected to CN9 instead of mmc_spi.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-migor/setup.c | 52 +++++++++++++++++--------------
1 file changed, 28 insertions(+), 24 deletions(-)
diff --git a/arch/sh/boards/mach-migor/setup.c b/arch/sh/boards/mach-migor/setup.c
index 6ed1fd32369e..8e911360c91e 100644
--- a/arch/sh/boards/mach-migor/setup.c
+++ b/arch/sh/boards/mach-migor/setup.c
@@ -18,8 +18,6 @@
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/gpio.h>
-#include <linux/spi/spi.h>
-#include <linux/spi/spi_gpio.h>
#include <video/sh_mobile_lcdc.h>
#include <media/sh_mobile_ceu.h>
#include <media/ov772x.h>
@@ -390,17 +388,25 @@ static struct platform_device migor_ceu_device = {
},
};
-struct spi_gpio_platform_data sdcard_cn9_platform_data = {
- .sck = GPIO_PTD0,
- .mosi = GPIO_PTD1,
- .miso = GPIO_PTD2,
- .num_chipselect = 1,
+static struct resource sdhi_cn9_resources[] = {
+ [0] = {
+ .name = "SDHI",
+ .start = 0x04ce0000,
+ .end = 0x04ce01ff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 101,
+ .flags = IORESOURCE_IRQ,
+ },
};
-static struct platform_device sdcard_cn9_device = {
- .name = "spi_gpio",
- .dev = {
- .platform_data = &sdcard_cn9_platform_data,
+static struct platform_device sdhi_cn9_device = {
+ .name = "sh_mobile_sdhi",
+ .num_resources = ARRAY_SIZE(sdhi_cn9_resources),
+ .resource = sdhi_cn9_resources,
+ .archdata = {
+ .hwblk_id = HWBLK_SDHI,
},
};
@@ -467,20 +473,11 @@ static struct platform_device *migor_devices[] __initdata = {
&migor_ceu_device,
&migor_nor_flash_device,
&migor_nand_flash_device,
- &sdcard_cn9_device,
+ &sdhi_cn9_device,
&migor_camera[0],
&migor_camera[1],
};
-static struct spi_board_info migor_spi_devices[] = {
- {
- .modalias = "mmc_spi",
- .max_speed_hz = 5000000,
- .chip_select = 0,
- .controller_data = (void *) GPIO_PTD5,
- },
-};
-
static int __init migor_devices_setup(void)
{
@@ -525,6 +522,16 @@ static int __init migor_devices_setup(void)
gpio_request(GPIO_PTA1, NULL);
gpio_direction_input(GPIO_PTA1);
+ /* SDHI */
+ gpio_request(GPIO_FN_SDHICD, NULL);
+ gpio_request(GPIO_FN_SDHIWP, NULL);
+ gpio_request(GPIO_FN_SDHID3, NULL);
+ gpio_request(GPIO_FN_SDHID2, NULL);
+ gpio_request(GPIO_FN_SDHID1, NULL);
+ gpio_request(GPIO_FN_SDHID0, NULL);
+ gpio_request(GPIO_FN_SDHICMD, NULL);
+ gpio_request(GPIO_FN_SDHICLK, NULL);
+
/* Touch Panel */
gpio_request(GPIO_FN_IRQ6, NULL);
@@ -612,9 +619,6 @@ static int __init migor_devices_setup(void)
i2c_register_board_info(0, migor_i2c_devices,
ARRAY_SIZE(migor_i2c_devices));
- spi_register_board_info(migor_spi_devices,
- ARRAY_SIZE(migor_spi_devices));
-
return platform_add_devices(migor_devices, ARRAY_SIZE(migor_devices));
}
arch_initcall(migor_devices_setup);
From 17f81473d1439178a1b5c50fdc013771993d6ec4 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 2 Oct 2009 02:22:56 +0000
Subject: [PATCH 049/137] sh: SDHI platform data to the AP325RXA board
Convert the AP325 board to use sh_mobile_sdhi for the
SD Card connected to CN3 instead of mmc_spi.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/board-ap325rxa.c | 52 ++++++++++++++++++---------------
1 file changed, 28 insertions(+), 24 deletions(-)
diff --git a/arch/sh/boards/board-ap325rxa.c b/arch/sh/boards/board-ap325rxa.c
index 2d080732a964..b95deee35e0f 100644
--- a/arch/sh/boards/board-ap325rxa.c
+++ b/arch/sh/boards/board-ap325rxa.c
@@ -20,8 +20,6 @@
#include <linux/i2c.h>
#include <linux/smsc911x.h>
#include <linux/gpio.h>
-#include <linux/spi/spi.h>
-#include <linux/spi/spi_gpio.h>
#include <media/ov772x.h>
#include <media/soc_camera.h>
#include <media/soc_camera_platform.h>
@@ -409,17 +407,25 @@ static struct platform_device ceu_device = {
},
};
-struct spi_gpio_platform_data sdcard_cn3_platform_data = {
- .sck = GPIO_PTD0,
- .mosi = GPIO_PTD1,
- .miso = GPIO_PTD2,
- .num_chipselect = 1,
+static struct resource sdhi0_cn3_resources[] = {
+ [0] = {
+ .name = "SDHI0",
+ .start = 0x04ce0000,
+ .end = 0x04ce01ff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 101,
+ .flags = IORESOURCE_IRQ,
+ },
};
-static struct platform_device sdcard_cn3_device = {
- .name = "spi_gpio",
- .dev = {
- .platform_data = &sdcard_cn3_platform_data,
+static struct platform_device sdhi0_cn3_device = {
+ .name = "sh_mobile_sdhi",
+ .num_resources = ARRAY_SIZE(sdhi0_cn3_resources),
+ .resource = sdhi0_cn3_resources,
+ .archdata = {
+ .hwblk_id = HWBLK_SDHI0,
},
};
@@ -470,20 +476,11 @@ static struct platform_device *ap325rxa_devices[] __initdata = {
&lcdc_device,
&ceu_device,
&nand_flash_device,
- &sdcard_cn3_device,
+ &sdhi0_cn3_device,
&ap325rxa_camera[0],
&ap325rxa_camera[1],
};
-static struct spi_board_info ap325rxa_spi_devices[] = {
- {
- .modalias = "mmc_spi",
- .max_speed_hz = 5000000,
- .chip_select = 0,
- .controller_data = (void *) GPIO_PTD5,
- },
-};
-
static int __init ap325rxa_devices_setup(void)
{
/* LD3 and LD4 LEDs */
@@ -578,12 +575,19 @@ static int __init ap325rxa_devices_setup(void)
platform_resource_setup_memory(&ceu_device, "ceu", 4 << 20);
+ /* SDHI0 */
+ gpio_request(GPIO_FN_SDHI0CD_PTD, NULL);
+ gpio_request(GPIO_FN_SDHI0WP_PTD, NULL);
+ gpio_request(GPIO_FN_SDHI0D3_PTD, NULL);
+ gpio_request(GPIO_FN_SDHI0D2_PTD, NULL);
+ gpio_request(GPIO_FN_SDHI0D1_PTD, NULL);
+ gpio_request(GPIO_FN_SDHI0D0_PTD, NULL);
+ gpio_request(GPIO_FN_SDHI0CMD_PTD, NULL);
+ gpio_request(GPIO_FN_SDHI0CLK_PTD, NULL);
+
i2c_register_board_info(0, ap325rxa_i2c_devices,
ARRAY_SIZE(ap325rxa_i2c_devices));
- spi_register_board_info(ap325rxa_spi_devices,
- ARRAY_SIZE(ap325rxa_spi_devices));
-
return platform_add_devices(ap325rxa_devices,
ARRAY_SIZE(ap325rxa_devices));
}
From 0f79af600946d2c0067587fe8154f36095a1ba97 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 2 Oct 2009 02:23:07 +0000
Subject: [PATCH 050/137] sh: SDHI platform data to the SE7724 board
Add SD Card support to the se7724 board using the
sh_mobile_sdhi driver hooked up to SDHI0 and CN7.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-se/7724/setup.c | 33 +++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/arch/sh/boards/mach-se/7724/setup.c b/arch/sh/boards/mach-se/7724/setup.c
index e78c3be8ad2f..ce6b36ebe64d 100644
--- a/arch/sh/boards/mach-se/7724/setup.c
+++ b/arch/sh/boards/mach-se/7724/setup.c
@@ -448,6 +448,28 @@ static struct platform_device sh7724_usb1_gadget_device = {
.resource = sh7724_usb1_gadget_resources,
};
+static struct resource sdhi0_cn7_resources[] = {
+ [0] = {
+ .name = "SDHI0",
+ .start = 0x04ce0000,
+ .end = 0x04ce01ff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 101,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device sdhi0_cn7_device = {
+ .name = "sh_mobile_sdhi",
+ .num_resources = ARRAY_SIZE(sdhi0_cn7_resources),
+ .resource = sdhi0_cn7_resources,
+ .archdata = {
+ .hwblk_id = HWBLK_SDHI0,
+ },
+};
+
static struct platform_device *ms7724se_devices[] __initdata = {
&heartbeat_device,
&smc91x_eth_device,
@@ -460,6 +482,7 @@ static struct platform_device *ms7724se_devices[] __initdata = {
&sh7724_usb0_host_device,
&sh7724_usb1_gadget_device,
&fsi_device,
+ &sdhi0_cn7_device,
};
#define EEPROM_OP 0xBA206000
@@ -698,6 +721,16 @@ static int __init devices_setup(void)
clk_set_rate(&fsimcka_clk, 11000);
clk_put(fsia_clk);
+ /* SDHI0 connected to cn7 */
+ gpio_request(GPIO_FN_SDHI0CD, NULL);
+ gpio_request(GPIO_FN_SDHI0WP, NULL);
+ gpio_request(GPIO_FN_SDHI0D3, NULL);
+ gpio_request(GPIO_FN_SDHI0D2, NULL);
+ gpio_request(GPIO_FN_SDHI0D1, NULL);
+ gpio_request(GPIO_FN_SDHI0D0, NULL);
+ gpio_request(GPIO_FN_SDHI0CMD, NULL);
+ gpio_request(GPIO_FN_SDHI0CLK, NULL);
+
/*
* enable SH-Eth
*
From d2a2fb97d1af449238d24356b1659325cf00372e Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 2 Oct 2009 02:23:19 +0000
Subject: [PATCH 051/137] sh: SDHI platform data to the kfr2r09 board
Add SD Card support to the kfr2r09 board using the
sh_mobile_sdhi driver hooked up to SDHI0 and yc304.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-kfr2r09/setup.c | 33 +++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index c08d33fe2104..6ce550cf9ba9 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -212,11 +212,34 @@ static struct platform_device kfr2r09_usb0_gadget_device = {
.resource = kfr2r09_usb0_gadget_resources,
};
+static struct resource kfr2r09_sh_sdhi0_resources[] = {
+ [0] = {
+ .name = "SDHI0",
+ .start = 0x04ce0000,
+ .end = 0x04ce01ff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 101,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device kfr2r09_sh_sdhi0_device = {
+ .name = "sh_mobile_sdhi",
+ .num_resources = ARRAY_SIZE(kfr2r09_sh_sdhi0_resources),
+ .resource = kfr2r09_sh_sdhi0_resources,
+ .archdata = {
+ .hwblk_id = HWBLK_SDHI0,
+ },
+};
+
static struct platform_device *kfr2r09_devices[] __initdata = {
&kfr2r09_nor_flash_device,
&kfr2r09_nand_flash_device,
&kfr2r09_sh_keysc_device,
&kfr2r09_sh_lcdc_device,
+ &kfr2r09_sh_sdhi0_device,
};
#define BSC_CS0BCR 0xfec10004
@@ -361,6 +384,16 @@ static int __init kfr2r09_devices_setup(void)
if (kfr2r09_usb0_gadget_setup() == 0)
platform_device_register(&kfr2r09_usb0_gadget_device);
+ /* SDHI0 connected to yc304 */
+ gpio_request(GPIO_FN_SDHI0CD, NULL);
+ gpio_request(GPIO_FN_SDHI0WP, NULL);
+ gpio_request(GPIO_FN_SDHI0D3, NULL);
+ gpio_request(GPIO_FN_SDHI0D2, NULL);
+ gpio_request(GPIO_FN_SDHI0D1, NULL);
+ gpio_request(GPIO_FN_SDHI0D0, NULL);
+ gpio_request(GPIO_FN_SDHI0CMD, NULL);
+ gpio_request(GPIO_FN_SDHI0CLK, NULL);
+
return platform_add_devices(kfr2r09_devices,
ARRAY_SIZE(kfr2r09_devices));
}
From 96987d96f0058d8689a2b8ac288dbff2e6d85563 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Date: Fri, 2 Oct 2009 07:54:42 +0000
Subject: [PATCH 052/137] sh: mach-ecevec24: Add SDHI support
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-ecovec24/setup.c | 78 ++++++++++++++++++++++++++++
1 file changed, 78 insertions(+)
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index 5f9881e16e2f..cb148cfe20c2 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -376,6 +376,54 @@ static struct platform_device keysc_device = {
},
};
+/* SHDI0 */
+static struct resource sdhi0_resources[] = {
+ [0] = {
+ .name = "SDHI0",
+ .start = 0x04ce0000,
+ .end = 0x04ce01ff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 101,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device sdhi0_device = {
+ .name = "sh_mobile_sdhi",
+ .num_resources = ARRAY_SIZE(sdhi0_resources),
+ .resource = sdhi0_resources,
+ .id = 0,
+ .archdata = {
+ .hwblk_id = HWBLK_SDHI0,
+ },
+};
+
+/* SHDI1 */
+static struct resource sdhi1_resources[] = {
+ [0] = {
+ .name = "SDHI1",
+ .start = 0x04cf0000,
+ .end = 0x04cf01ff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 24,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device sdhi1_device = {
+ .name = "sh_mobile_sdhi",
+ .num_resources = ARRAY_SIZE(sdhi1_resources),
+ .resource = sdhi1_resources,
+ .id = 1,
+ .archdata = {
+ .hwblk_id = HWBLK_SDHI1,
+ },
+};
+
static struct platform_device *ecovec_devices[] __initdata = {
&heartbeat_device,
&nor_flash_device,
@@ -386,6 +434,8 @@ static struct platform_device *ecovec_devices[] __initdata = {
&ceu0_device,
&ceu1_device,
&keysc_device,
+ &sdhi0_device,
+ &sdhi1_device,
};
#define EEPROM_ADDR 0x50
@@ -649,6 +699,34 @@ static int __init arch_setup(void)
gpio_direction_input(GPIO_PTR5);
gpio_direction_input(GPIO_PTR6);
+ /* enable SDHI0 */
+ gpio_request(GPIO_FN_SDHI0CD, NULL);
+ gpio_request(GPIO_FN_SDHI0WP, NULL);
+ gpio_request(GPIO_FN_SDHI0CMD, NULL);
+ gpio_request(GPIO_FN_SDHI0CLK, NULL);
+ gpio_request(GPIO_FN_SDHI0D3, NULL);
+ gpio_request(GPIO_FN_SDHI0D2, NULL);
+ gpio_request(GPIO_FN_SDHI0D1, NULL);
+ gpio_request(GPIO_FN_SDHI0D0, NULL);
+
+ /* enable SDHI1 */
+ gpio_request(GPIO_FN_SDHI1CD, NULL);
+ gpio_request(GPIO_FN_SDHI1WP, NULL);
+ gpio_request(GPIO_FN_SDHI1CMD, NULL);
+ gpio_request(GPIO_FN_SDHI1CLK, NULL);
+ gpio_request(GPIO_FN_SDHI1D3, NULL);
+ gpio_request(GPIO_FN_SDHI1D2, NULL);
+ gpio_request(GPIO_FN_SDHI1D1, NULL);
+ gpio_request(GPIO_FN_SDHI1D0, NULL);
+
+ gpio_request(GPIO_PTB6, NULL);
+ gpio_request(GPIO_PTB7, NULL);
+ gpio_direction_output(GPIO_PTB6, 1);
+ gpio_direction_output(GPIO_PTB7, 1);
+
+ /* I/O buffer drive ability is high for SDHI1 */
+ ctrl_outw((ctrl_inw(IODRIVEA) & ~0x3000) | 0x2000 , IODRIVEA);
+
/* enable I2C device */
i2c_register_board_info(1, i2c1_devices,
ARRAY_SIZE(i2c1_devices));
From ef01b9a06d28e37d28f6eb19e60dd78eb1f11639 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Mon, 26 Oct 2009 10:30:48 +0000
Subject: [PATCH 053/137] sh: fix kexec by removing check for old kexec-tools
This unbreaks kexec support. Without this fix all
cases of kexec fails since __pa() does not behave
like PHYSADDR(). The downside is that we also kill
the code blocking users running old kexec-tools.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/machine_kexec.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c
index de7cf5477d3f..76f280223ebd 100644
--- a/arch/sh/kernel/machine_kexec.c
+++ b/arch/sh/kernel/machine_kexec.c
@@ -46,12 +46,6 @@ void machine_crash_shutdown(struct pt_regs *regs)
*/
int machine_kexec_prepare(struct kimage *image)
{
- /* older versions of kexec-tools are passing
- * the zImage entry point as a virtual address.
- */
- if (image->start != __pa(image->start))
- return -EINVAL; /* upgrade your kexec-tools */
-
return 0;
}
From 40e4231809a022586caa8f253663317033ba2eb1 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Mon, 26 Oct 2009 10:41:58 +0000
Subject: [PATCH 054/137] sh: add hwblk_id to sh_eth on ecovec24
Add HWBLK_ETHER to the sh_eth platform device
to allow Runtime PM of the ethernet hardware.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-ecovec24/setup.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index 9d15196952a0..dfc262bff0ad 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -147,6 +147,9 @@ static struct platform_device sh_eth_device = {
},
.num_resources = ARRAY_SIZE(sh_eth_resources),
.resource = sh_eth_resources,
+ .archdata = {
+ .hwblk_id = HWBLK_ETHER,
+ },
};
/* USB0 host */
From 376abbb4b31ac9a7fe90fb48b98e2c977cb3d882 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Mon, 26 Oct 2009 10:44:37 +0000
Subject: [PATCH 055/137] sh: mac address through private data for sh_eth on
ecovec24
Convert the ecovec24 board code to pass the mac
address to the sh_eth driver using platform data.
Also, remove the static clock to allow Runtime PM.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-ecovec24/setup.c | 33 ++++------------------------
1 file changed, 4 insertions(+), 29 deletions(-)
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index dfc262bff0ad..da851a3b714a 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -519,12 +519,9 @@ static u8 mac_read(struct i2c_adapter *a, u8 command)
return buf;
}
-#define MAC_LEN 6
-static void __init sh_eth_init(void)
+static void __init sh_eth_init(struct sh_eth_plat_data *pd)
{
struct i2c_adapter *a = i2c_get_adapter(1);
- struct clk *eth_clk;
- u8 mac[MAC_LEN];
int i;
if (!a) {
@@ -532,33 +529,11 @@ static void __init sh_eth_init(void)
return;
}
- eth_clk = clk_get(NULL, "eth0");
- if (!eth_clk) {
- pr_err("can not get eth0 clk\n");
- return;
- }
-
/* read MAC address frome EEPROM */
- for (i = 0; i < MAC_LEN; i++) {
- mac[i] = mac_read(a, 0x10 + i);
+ for (i = 0; i < sizeof(pd->mac_addr); i++) {
+ pd->mac_addr[i] = mac_read(a, 0x10 + i);
msleep(10);
}
-
- /* clock enable */
- clk_enable(eth_clk);
-
- /* reset sh-eth */
- ctrl_outl(0x1, SH_ETH_ADDR + 0x0);
-
- /* set MAC addr */
- ctrl_outl((mac[0] << 24) |
- (mac[1] << 16) |
- (mac[2] << 8) |
- (mac[3] << 0), SH_ETH_MAHR);
- ctrl_outl((mac[4] << 8) |
- (mac[5] << 0), SH_ETH_MALR);
-
- clk_put(eth_clk);
}
#define PORT_HIZA 0xA4050158
@@ -802,7 +777,7 @@ arch_initcall(arch_setup);
static int __init devices_setup(void)
{
- sh_eth_init();
+ sh_eth_init(&sh_eth_plat);
return 0;
}
device_initcall(devices_setup);
From f72f7876ae0bc0f018fca140e66aa16fedb57d89 Mon Sep 17 00:00:00 2001
From: Valentin R Sitsikov <valentin.sitdikov@siemens.com>
Date: Fri, 16 Oct 2009 10:45:47 +0000
Subject: [PATCH 056/137] sh: fix watchdog timer for sh7780/sh7785
Signed-off-by: Valentin Sitdikov <valentin.sitdikov@siemens.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/watchdog.h | 59 +++++++++++++++++++++++++-
arch/sh/include/cpu-sh4/cpu/watchdog.h | 13 ++++++
2 files changed, 71 insertions(+), 1 deletion(-)
diff --git a/arch/sh/include/asm/watchdog.h b/arch/sh/include/asm/watchdog.h
index 2fe7cee9e43a..19dfff5c8511 100644
--- a/arch/sh/include/asm/watchdog.h
+++ b/arch/sh/include/asm/watchdog.h
@@ -2,6 +2,8 @@
* include/asm-sh/watchdog.h
*
* Copyright (C) 2002, 2003 Paul Mundt
+ * Copyright (C) 2009 Siemens AG
+ * Copyright (C) 2009 Valentin Sitdikov
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -61,6 +63,61 @@
#define WTCSR_CKS_2048 0x06
#define WTCSR_CKS_4096 0x07
+#if defined(CONFIG_CPU_SUBTYPE_SH7785) || defined(CONFIG_CPU_SUBTYPE_SH7780)
+/**
+ * sh_wdt_read_cnt - Read from Counter
+ * Reads back the WTCNT value.
+ */
+static inline __u32 sh_wdt_read_cnt(void)
+{
+ return ctrl_inl(WTCNT_R);
+}
+
+/**
+ * sh_wdt_write_cnt - Write to Counter
+ * @val: Value to write
+ *
+ * Writes the given value @val to the lower byte of the timer counter.
+ * The upper byte is set manually on each write.
+ */
+static inline void sh_wdt_write_cnt(__u32 val)
+{
+ ctrl_outl((WTCNT_HIGH << 24) | (__u32)val, WTCNT);
+}
+
+/**
+ * sh_wdt_write_bst - Write to Counter
+ * @val: Value to write
+ *
+ * Writes the given value @val to the lower byte of the timer counter.
+ * The upper byte is set manually on each write.
+ */
+static inline void sh_wdt_write_bst(__u32 val)
+{
+ ctrl_outl((WTBST_HIGH << 24) | (__u32)val, WTBST);
+}
+/**
+ * sh_wdt_read_csr - Read from Control/Status Register
+ *
+ * Reads back the WTCSR value.
+ */
+static inline __u32 sh_wdt_read_csr(void)
+{
+ return ctrl_inl(WTCSR_R);
+}
+
+/**
+ * sh_wdt_write_csr - Write to Control/Status Register
+ * @val: Value to write
+ *
+ * Writes the given value @val to the lower byte of the control/status
+ * register. The upper byte is set manually on each write.
+ */
+static inline void sh_wdt_write_csr(__u32 val)
+{
+ ctrl_outl((WTCSR_HIGH << 24) | (__u32)val, WTCSR);
+}
+#else
/**
* sh_wdt_read_cnt - Read from Counter
* Reads back the WTCNT value.
@@ -103,6 +160,6 @@ static inline void sh_wdt_write_csr(__u8 val)
{
ctrl_outw((WTCSR_HIGH << 8) | (__u16)val, WTCSR);
}
-
+#endif /* CONFIG_CPU_SUBTYPE_SH7785 || CONFIG_CPU_SUBTYPE_SH7780 */
#endif /* __KERNEL__ */
#endif /* __ASM_SH_WATCHDOG_H */
diff --git a/arch/sh/include/cpu-sh4/cpu/watchdog.h b/arch/sh/include/cpu-sh4/cpu/watchdog.h
index 259f6a0ce23d..7672301d0c70 100644
--- a/arch/sh/include/cpu-sh4/cpu/watchdog.h
+++ b/arch/sh/include/cpu-sh4/cpu/watchdog.h
@@ -2,6 +2,8 @@
* include/asm-sh/cpu-sh4/watchdog.h
*
* Copyright (C) 2002, 2003 Paul Mundt
+ * Copyright (C) 2009 Siemens AG
+ * Copyright (C) 2009 Sitdikov Valentin
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
@@ -10,9 +12,20 @@
#ifndef __ASM_CPU_SH4_WATCHDOG_H
#define __ASM_CPU_SH4_WATCHDOG_H
+#if defined(CONFIG_CPU_SUBTYPE_SH7785) || defined(CONFIG_CPU_SUBTYPE_SH7780)
+/* Prefix definition */
+#define WTBST_HIGH 0x55
+/* Register definitions */
+#define WTCNT_R 0xffcc0010 /*WDTCNT*/
+#define WTCSR 0xffcc0004 /*WDTCSR*/
+#define WTCNT 0xffcc0000 /*WDTST*/
+#define WTST WTCNT
+#define WTBST 0xffcc0008 /*WDTBST*/
+#else
/* Register definitions */
#define WTCNT 0xffc00008
#define WTCSR 0xffc0000c
+#endif
/* Bit definitions */
#define WTCSR_TME 0x80
From 3f375f12ecb9c691dda70bb64b313e55fe6ee4ee Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Mon, 26 Oct 2009 22:19:49 +0000
Subject: [PATCH 057/137] sh: Annotate irq functions with "notrace"
Now that SH's irqflags functions are out of line it becomes necessary to
mark them as "notrace" so that we don't try to trace them.
[ Do the same for irq_64.c -- PFM. ]
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/irq_32.c | 4 ++--
arch/sh/kernel/irq_64.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/sh/kernel/irq_32.c b/arch/sh/kernel/irq_32.c
index b98a694ead31..e33ab15831f9 100644
--- a/arch/sh/kernel/irq_32.c
+++ b/arch/sh/kernel/irq_32.c
@@ -10,7 +10,7 @@
#include <linux/irqflags.h>
#include <linux/module.h>
-void raw_local_irq_restore(unsigned long flags)
+void notrace raw_local_irq_restore(unsigned long flags)
{
unsigned long __dummy0, __dummy1;
@@ -40,7 +40,7 @@ void raw_local_irq_restore(unsigned long flags)
}
EXPORT_SYMBOL(raw_local_irq_restore);
-unsigned long __raw_local_save_flags(void)
+unsigned long notrace __raw_local_save_flags(void)
{
unsigned long flags;
diff --git a/arch/sh/kernel/irq_64.c b/arch/sh/kernel/irq_64.c
index 09d92718c996..32365ba0e039 100644
--- a/arch/sh/kernel/irq_64.c
+++ b/arch/sh/kernel/irq_64.c
@@ -11,7 +11,7 @@
#include <linux/module.h>
#include <cpu/registers.h>
-void raw_local_irq_restore(unsigned long flags)
+void notrace raw_local_irq_restore(unsigned long flags)
{
unsigned long long __dummy;
@@ -35,7 +35,7 @@ void raw_local_irq_restore(unsigned long flags)
}
EXPORT_SYMBOL(raw_local_irq_restore);
-unsigned long __raw_local_save_flags(void)
+unsigned long notrace __raw_local_save_flags(void)
{
unsigned long flags;
From 01be5d63fd4645eab1d05a7caa04462c11c8b7a1 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 27 Oct 2009 10:35:02 +0900
Subject: [PATCH 058/137] sh: Revamp PCI DMA coherence Kconfig bits.
Leaving this configurable caused more trouble than it was ever worth, so
just make it explicit. Boards that are verified one way or the other can
fix up their selects accordingly. We presently default to non-coherent
for most platforms.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/Kconfig | 7 +++++++
arch/sh/drivers/pci/Kconfig | 12 ------------
arch/sh/include/asm/pci.h | 20 +++++++-------------
arch/sh/kernel/dma-nommu.c | 4 ++++
4 files changed, 18 insertions(+), 25 deletions(-)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 2d3a69993858..e5ee3b159e50 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -169,6 +169,12 @@ config ARCH_HAS_CPU_IDLE_WAIT
config IO_TRAPPED
bool
+config DMA_COHERENT
+ bool
+
+config DMA_NONCOHERENT
+ def_bool !DMA_COHERENT
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
@@ -217,6 +223,7 @@ config CPU_SHX2
config CPU_SHX3
bool
+ select DMA_COHERENT
config ARCH_SHMOBILE
bool
diff --git a/arch/sh/drivers/pci/Kconfig b/arch/sh/drivers/pci/Kconfig
index e8db585a6638..78a3ce1e6c4d 100644
--- a/arch/sh/drivers/pci/Kconfig
+++ b/arch/sh/drivers/pci/Kconfig
@@ -5,15 +5,3 @@ config PCI
Find out whether you have a PCI motherboard. PCI is the name of a
bus system, i.e. the way the CPU talks to the other stuff inside
your box. If you have PCI, say Y, otherwise N.
-
-config SH_PCIDMA_NONCOHERENT
- bool "Cache and PCI noncoherent"
- depends on PCI
- default y
- help
- Enable this option if your platform does not have a CPU cache which
- remains coherent with PCI DMA. It is safest to say 'Y', although you
- will see better performance if you can say 'N', because the PCI DMA
- code will not have to flush the CPU's caches. If you have a PCI host
- bridge integrated with your SH CPU, refer carefully to the chip specs
- to see if you can say 'N' here. Otherwise, leave it as 'Y'.
diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h
index 6bf276b4f85d..67f3999b544e 100644
--- a/arch/sh/include/asm/pci.h
+++ b/arch/sh/include/asm/pci.h
@@ -57,19 +57,13 @@ static inline void pcibios_penalize_isa_irq(int irq, int active)
/* pci_unmap_{single,page} being a nop depends upon the
* configuration.
*/
-#ifdef CONFIG_SH_PCIDMA_NONCOHERENT
-#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
- dma_addr_t ADDR_NAME;
-#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
- __u32 LEN_NAME;
-#define pci_unmap_addr(PTR, ADDR_NAME) \
- ((PTR)->ADDR_NAME)
-#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
- (((PTR)->ADDR_NAME) = (VAL))
-#define pci_unmap_len(PTR, LEN_NAME) \
- ((PTR)->LEN_NAME)
-#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
- (((PTR)->LEN_NAME) = (VAL))
+#ifdef CONFIG_DMA_NONCOHERENT
+#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME;
+#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) __u32 LEN_NAME;
+#define pci_unmap_addr(PTR, ADDR_NAME) ((PTR)->ADDR_NAME)
+#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
+#define pci_unmap_len(PTR, LEN_NAME) ((PTR)->LEN_NAME)
+#define pci_unmap_len_set(PTR, LEN_NAME, VAL) (((PTR)->LEN_NAME) = (VAL))
#else
#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
diff --git a/arch/sh/kernel/dma-nommu.c b/arch/sh/kernel/dma-nommu.c
index b336fcf40f12..3c55b87f8b63 100644
--- a/arch/sh/kernel/dma-nommu.c
+++ b/arch/sh/kernel/dma-nommu.c
@@ -44,6 +44,7 @@ static int nommu_map_sg(struct device *dev, struct scatterlist *sg,
return nents;
}
+#ifdef CONFIG_DMA_NONCOHERENT
static void nommu_sync_single(struct device *dev, dma_addr_t addr,
size_t size, enum dma_data_direction dir)
{
@@ -59,14 +60,17 @@ static void nommu_sync_sg(struct device *dev, struct scatterlist *sg,
for_each_sg(sg, s, nelems, i)
dma_cache_sync(dev, sg_virt(s), s->length, dir);
}
+#endif
struct dma_map_ops nommu_dma_ops = {
.alloc_coherent = dma_generic_alloc_coherent,
.free_coherent = dma_generic_free_coherent,
.map_page = nommu_map_page,
.map_sg = nommu_map_sg,
+#ifdef CONFIG_DMA_NONCOHERENT
.sync_single_for_device = nommu_sync_single,
.sync_sg_for_device = nommu_sync_sg,
+#endif
.is_phys = 1,
};
From 7693465d81827107caf9c447b9ad91098a1c4941 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 27 Oct 2009 10:36:55 +0900
Subject: [PATCH 059/137] sh: Kill off superfluous arch/sh/drivers/pci/Kconfig.
Now that this contains a grand total of 1 Kconfig option, it's hardly
worth keeping split out. Roll CONFIG_PCI back in to the top-level
architecture Kconfig, along with the other bus types.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/Kconfig | 8 +++++++-
arch/sh/drivers/pci/Kconfig | 7 -------
2 files changed, 7 insertions(+), 8 deletions(-)
delete mode 100644 arch/sh/drivers/pci/Kconfig
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index e5ee3b159e50..1481df2cb2e3 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -811,7 +811,13 @@ config MAPLE
Dreamcast with a serial line terminal or a remote network
connection.
-source "arch/sh/drivers/pci/Kconfig"
+config PCI
+ bool "PCI support"
+ depends on SYS_SUPPORTS_PCI
+ help
+ Find out whether you have a PCI motherboard. PCI is the name of a
+ bus system, i.e. the way the CPU talks to the other stuff inside
+ your box. If you have PCI, say Y, otherwise N.
source "drivers/pci/pcie/Kconfig"
diff --git a/arch/sh/drivers/pci/Kconfig b/arch/sh/drivers/pci/Kconfig
deleted file mode 100644
index 78a3ce1e6c4d..000000000000
--- a/arch/sh/drivers/pci/Kconfig
+++ /dev/null
@@ -1,7 +0,0 @@
-config PCI
- bool "PCI support"
- depends on SYS_SUPPORTS_PCI
- help
- Find out whether you have a PCI motherboard. PCI is the name of a
- bus system, i.e. the way the CPU talks to the other stuff inside
- your box. If you have PCI, say Y, otherwise N.
From 478fb158005b55c8484f23a6beb1b69f5a612162 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 27 Oct 2009 10:41:58 +0900
Subject: [PATCH 060/137] sh: Fix up dma_is_consistent().
This fixes up the dma_is_consistent() definition for the various
coherence options.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/dma-mapping.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
index 653076018df0..87ced133a363 100644
--- a/arch/sh/include/asm/dma-mapping.h
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -41,7 +41,12 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+
+#ifdef CONFIG_DMA_COHERENT
#define dma_is_consistent(d, h) (1)
+#else
+#define dma_is_consistent(d, h) (0)
+#endif
static inline int dma_get_cache_alignment(void)
{
From 0a993b0a290a2672500000b0ce811efc093f8467 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 27 Oct 2009 10:51:35 +0900
Subject: [PATCH 061/137] sh64: cache flush symbol exports.
These were previously hidden in sh_ksyms_32, despite also being needed
for sh64 now that the cache.c code is shared.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/sh_ksyms_32.c | 11 -----------
arch/sh/mm/cache.c | 6 ++++++
2 files changed, 6 insertions(+), 11 deletions(-)
diff --git a/arch/sh/kernel/sh_ksyms_32.c b/arch/sh/kernel/sh_ksyms_32.c
index 509830da6f30..396e47d076fe 100644
--- a/arch/sh/kernel/sh_ksyms_32.c
+++ b/arch/sh/kernel/sh_ksyms_32.c
@@ -108,11 +108,6 @@ DECLARE_EXPORT(__udivsi3_i4);
DECLARE_EXPORT(__sdivsi3_i4i);
DECLARE_EXPORT(__udivsi3_i4i);
-/* needed by some modules */
-EXPORT_SYMBOL(flush_cache_all);
-EXPORT_SYMBOL(flush_cache_range);
-EXPORT_SYMBOL(flush_dcache_page);
-
#ifdef CONFIG_MCOUNT
DECLARE_EXPORT(mcount);
#endif
@@ -125,9 +120,3 @@ EXPORT_SYMBOL(copy_page);
EXPORT_SYMBOL(__clear_user);
EXPORT_SYMBOL(_ebss);
EXPORT_SYMBOL(empty_zero_page);
-
-#ifndef CONFIG_CACHE_OFF
-EXPORT_SYMBOL(__flush_purge_region);
-EXPORT_SYMBOL(__flush_wback_region);
-EXPORT_SYMBOL(__flush_invalidate_region);
-#endif
diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c
index fc372a1d3132..63c132998f24 100644
--- a/arch/sh/mm/cache.c
+++ b/arch/sh/mm/cache.c
@@ -27,8 +27,11 @@ void (*local_flush_icache_page)(void *args) = cache_noop;
void (*local_flush_cache_sigtramp)(void *args) = cache_noop;
void (*__flush_wback_region)(void *start, int size);
+EXPORT_SYMBOL(__flush_wback_region);
void (*__flush_purge_region)(void *start, int size);
+EXPORT_SYMBOL(__flush_purge_region);
void (*__flush_invalidate_region)(void *start, int size);
+EXPORT_SYMBOL(__flush_invalidate_region);
static inline void noop__flush_region(void *start, int size)
{
@@ -161,6 +164,7 @@ void flush_cache_all(void)
{
cacheop_on_each_cpu(local_flush_cache_all, NULL, 1);
}
+EXPORT_SYMBOL(flush_cache_all);
void flush_cache_mm(struct mm_struct *mm)
{
@@ -201,11 +205,13 @@ void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
cacheop_on_each_cpu(local_flush_cache_range, (void *)&data, 1);
}
+EXPORT_SYMBOL(flush_cache_range);
void flush_dcache_page(struct page *page)
{
cacheop_on_each_cpu(local_flush_dcache_page, page, 1);
}
+EXPORT_SYMBOL(flush_dcache_page);
void flush_icache_range(unsigned long start, unsigned long end)
{
From 9b798d50df3a98d22a6cbae565d9f4f630d161a6 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 27 Oct 2009 11:36:43 +0900
Subject: [PATCH 062/137] sh: intc: Make ack_regs generally available.
Currently this is ifdef'ed under SH-3 and SH-4A, but there are other CPUs
that will need this as well. Given the size of the existing data
structures, this doesn't cause any additional cacheline utilization for
the existing users, so has no direct impact on the data structures.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/sh/intc.c | 14 +-------------
include/linux/sh_intc.h | 4 ----
2 files changed, 1 insertion(+), 17 deletions(-)
diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c
index 559b5fe9dc0f..94e6e46ff82c 100644
--- a/drivers/sh/intc.c
+++ b/drivers/sh/intc.c
@@ -70,9 +70,7 @@ static LIST_HEAD(intc_list);
#endif
static unsigned int intc_prio_level[NR_IRQS]; /* for now */
-#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
static unsigned long ack_handle[NR_IRQS];
-#endif
static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
{
@@ -250,7 +248,6 @@ static int intc_set_wake(unsigned int irq, unsigned int on)
return 0; /* allow wakeup, but setup hardware in intc_suspend() */
}
-#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
static void intc_mask_ack(unsigned int irq)
{
struct intc_desc_int *d = get_intc_desc(irq);
@@ -282,7 +279,6 @@ static void intc_mask_ack(unsigned int irq)
}
}
}
-#endif
static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp,
unsigned int nr_hp,
@@ -501,7 +497,6 @@ static unsigned int __init intc_prio_data(struct intc_desc *desc,
return 0;
}
-#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
static unsigned int __init intc_ack_data(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id)
@@ -533,7 +528,6 @@ static unsigned int __init intc_ack_data(struct intc_desc *desc,
return 0;
}
-#endif
static unsigned int __init intc_sense_data(struct intc_desc *desc,
struct intc_desc_int *d,
@@ -641,10 +635,8 @@ static void __init intc_register_irq(struct intc_desc *desc,
/* irq should be disabled by default */
d->chip.mask(irq);
-#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
if (desc->ack_regs)
ack_handle[irq] = intc_ack_data(desc, d, enum_id);
-#endif
}
static unsigned int __init save_reg(struct intc_desc_int *d,
@@ -681,10 +673,8 @@ void __init register_intc_controller(struct intc_desc *desc)
d->nr_reg = desc->mask_regs ? desc->nr_mask_regs * 2 : 0;
d->nr_reg += desc->prio_regs ? desc->nr_prio_regs * 2 : 0;
d->nr_reg += desc->sense_regs ? desc->nr_sense_regs : 0;
-
-#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
d->nr_reg += desc->ack_regs ? desc->nr_ack_regs : 0;
-#endif
+
d->reg = kzalloc(d->nr_reg * sizeof(*d->reg), GFP_NOWAIT);
#ifdef CONFIG_SMP
d->smp = kzalloc(d->nr_reg * sizeof(*d->smp), GFP_NOWAIT);
@@ -727,14 +717,12 @@ void __init register_intc_controller(struct intc_desc *desc)
d->chip.set_type = intc_set_sense;
d->chip.set_wake = intc_set_wake;
-#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
if (desc->ack_regs) {
for (i = 0; i < desc->nr_ack_regs; i++)
k += save_reg(d, k, desc->ack_regs[i].set_reg, 0);
d->chip.mask_ack = intc_mask_ack;
}
-#endif
BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */
diff --git a/include/linux/sh_intc.h b/include/linux/sh_intc.h
index 68e212ff9dde..4e4b22d50164 100644
--- a/include/linux/sh_intc.h
+++ b/include/linux/sh_intc.h
@@ -57,10 +57,8 @@ struct intc_desc {
struct intc_sense_reg *sense_regs;
unsigned int nr_sense_regs;
char *name;
-#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
struct intc_mask_reg *ack_regs;
unsigned int nr_ack_regs;
-#endif
};
#define _INTC_ARRAY(a) a, sizeof(a)/sizeof(*a)
@@ -73,7 +71,6 @@ struct intc_desc symbol __initdata = { \
chipname, \
}
-#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
#define DECLARE_INTC_DESC_ACK(symbol, chipname, vectors, groups, \
mask_regs, prio_regs, sense_regs, ack_regs) \
struct intc_desc symbol __initdata = { \
@@ -83,7 +80,6 @@ struct intc_desc symbol __initdata = { \
chipname, \
_INTC_ARRAY(ack_regs), \
}
-#endif
void __init register_intc_controller(struct intc_desc *desc);
int intc_set_priority(unsigned int irq, unsigned int prio);
From 4c978ca3194a4002407a85b15122f793efc8616b Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 27 Oct 2009 11:51:19 +0900
Subject: [PATCH 063/137] sh: Clean up more superfluous symbol exports.
Many of these symbols went away completely, or we just never cared about
them in the first place. Trim the exports down to the essential set.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/process_32.c | 2 ++
arch/sh/kernel/process_64.c | 2 ++
arch/sh/kernel/sh_ksyms_32.c | 53 ++++++++----------------------------
arch/sh/kernel/sh_ksyms_64.c | 10 -------
4 files changed, 16 insertions(+), 51 deletions(-)
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index 0673c4746be3..a40342be32b2 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -142,6 +142,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
return pid;
}
+EXPORT_SYMBOL(kernel_thread);
/*
* Free current thread data structures etc..
@@ -186,6 +187,7 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
return fpvalid;
}
+EXPORT_SYMBOL(dump_fpu);
asmlinkage void ret_from_fork(void);
diff --git a/arch/sh/kernel/process_64.c b/arch/sh/kernel/process_64.c
index 1192398ef582..359b8a2f4d2e 100644
--- a/arch/sh/kernel/process_64.c
+++ b/arch/sh/kernel/process_64.c
@@ -335,6 +335,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
®s, 0, NULL, NULL);
}
+EXPORT_SYMBOL(kernel_thread);
/*
* Free current thread data structures etc..
@@ -417,6 +418,7 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
return 0; /* Task didn't use the fpu at all. */
#endif
}
+EXPORT_SYMBOL(dump_fpu);
asmlinkage void ret_from_fork(void);
diff --git a/arch/sh/kernel/sh_ksyms_32.c b/arch/sh/kernel/sh_ksyms_32.c
index 396e47d076fe..3896f26efa4a 100644
--- a/arch/sh/kernel/sh_ksyms_32.c
+++ b/arch/sh/kernel/sh_ksyms_32.c
@@ -1,37 +1,11 @@
#include <linux/module.h>
-#include <linux/smp.h>
-#include <linux/user.h>
-#include <linux/elfcore.h>
-#include <linux/sched.h>
-#include <linux/in6.h>
-#include <linux/interrupt.h>
-#include <linux/vmalloc.h>
-#include <linux/pci.h>
-#include <linux/irq.h>
-#include <asm/sections.h>
-#include <asm/processor.h>
-#include <asm/uaccess.h>
+#include <linux/string.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
#include <asm/checksum.h>
-#include <asm/io.h>
-#include <asm/delay.h>
-#include <asm/tlbflush.h>
-#include <asm/cacheflush.h>
-#include <asm/ftrace.h>
+#include <asm/sections.h>
-extern int dump_fpu(struct pt_regs *, elf_fpregset_t *);
-
-/* platform dependent support */
-EXPORT_SYMBOL(dump_fpu);
-EXPORT_SYMBOL(kernel_thread);
-EXPORT_SYMBOL(strlen);
-
-/* PCI exports */
-#ifdef CONFIG_PCI
-EXPORT_SYMBOL(pci_alloc_consistent);
-EXPORT_SYMBOL(pci_free_consistent);
-#endif
-
-/* mem exports */
EXPORT_SYMBOL(memchr);
EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(memset);
@@ -40,6 +14,13 @@ EXPORT_SYMBOL(__copy_user);
EXPORT_SYMBOL(__udelay);
EXPORT_SYMBOL(__ndelay);
EXPORT_SYMBOL(__const_udelay);
+EXPORT_SYMBOL(strlen);
+EXPORT_SYMBOL(csum_partial);
+EXPORT_SYMBOL(csum_partial_copy_generic);
+EXPORT_SYMBOL(copy_page);
+EXPORT_SYMBOL(__clear_user);
+EXPORT_SYMBOL(_ebss);
+EXPORT_SYMBOL(empty_zero_page);
#define DECLARE_EXPORT(name) \
extern void name(void);EXPORT_SYMBOL(name)
@@ -107,16 +88,6 @@ DECLARE_EXPORT(__sdivsi3_i4);
DECLARE_EXPORT(__udivsi3_i4);
DECLARE_EXPORT(__sdivsi3_i4i);
DECLARE_EXPORT(__udivsi3_i4i);
-
#ifdef CONFIG_MCOUNT
DECLARE_EXPORT(mcount);
#endif
-EXPORT_SYMBOL(csum_partial);
-EXPORT_SYMBOL(csum_partial_copy_generic);
-#ifdef CONFIG_IPV6
-EXPORT_SYMBOL(csum_ipv6_magic);
-#endif
-EXPORT_SYMBOL(copy_page);
-EXPORT_SYMBOL(__clear_user);
-EXPORT_SYMBOL(_ebss);
-EXPORT_SYMBOL(empty_zero_page);
diff --git a/arch/sh/kernel/sh_ksyms_64.c b/arch/sh/kernel/sh_ksyms_64.c
index d008e17eb257..45afa5c51f67 100644
--- a/arch/sh/kernel/sh_ksyms_64.c
+++ b/arch/sh/kernel/sh_ksyms_64.c
@@ -24,16 +24,6 @@
#include <asm/delay.h>
#include <asm/irq.h>
-extern int dump_fpu(struct pt_regs *, elf_fpregset_t *);
-
-/* platform dependent support */
-EXPORT_SYMBOL(dump_fpu);
-EXPORT_SYMBOL(kernel_thread);
-
-#ifdef CONFIG_VT
-EXPORT_SYMBOL(screen_info);
-#endif
-
EXPORT_SYMBOL(__put_user_asm_b);
EXPORT_SYMBOL(__put_user_asm_w);
EXPORT_SYMBOL(__put_user_asm_l);
From 94c285108e4551157ecc1b8156921712138fa860 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 27 Oct 2009 17:07:45 +0900
Subject: [PATCH 064/137] sh: Bump up dma_ops initialization far earlier in the
boot process.
Presently this was tacked on to the dma debug init bits from
fs_initcall(), which is far too late for devices setting up their own
per-device coherent areas.
Throw this in the beginning of mem_init(), as per the x86 iommu
allocation.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/consistent.c | 2 --
arch/sh/mm/init.c | 11 +++++++++++
2 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index ef20bbabefa0..902967e3f841 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -27,8 +27,6 @@ EXPORT_SYMBOL(dma_ops);
static int __init dma_init(void)
{
dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
-
- no_iommu_init();
return 0;
}
fs_initcall(dma_init);
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index c8af6c5fa586..432acd07e76a 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -15,6 +15,7 @@
#include <linux/pagemap.h>
#include <linux/percpu.h>
#include <linux/io.h>
+#include <linux/dma-mapping.h>
#include <asm/mmu_context.h>
#include <asm/tlb.h>
#include <asm/cacheflush.h>
@@ -186,11 +187,21 @@ void __init paging_init(void)
set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start));
}
+/*
+ * Early initialization for any I/O MMUs we might have.
+ */
+static void __init iommu_init(void)
+{
+ no_iommu_init();
+}
+
void __init mem_init(void)
{
int codesize, datasize, initsize;
int nid;
+ iommu_init();
+
num_physpages = 0;
high_memory = NULL;
From 72f0c137a5c82df628dc646a82b9d8e3277b1234 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 27 Oct 2009 17:08:55 +0900
Subject: [PATCH 065/137] sh: enable PERF_USE_VMALLOC across the board.
The vast majority of SH platforms want this, and the few that don't
aren't going to care one way or the other. Enable it across the board.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 1481df2cb2e3..a6a70233033d 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -18,6 +18,7 @@ config SUPERH
select HAVE_DMA_API_DEBUG
select HAVE_DMA_ATTRS
select HAVE_PERF_EVENTS
+ select PERF_USE_VMALLOC
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_LZMA
From 8013cc9a5d2f6dcb79ffdcf707cf90ba120edfec Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Tue, 27 Oct 2009 10:47:34 +0000
Subject: [PATCH 066/137] sh: mac address through private data for sh_eth on
ms7724se
Convert the ms7724se board code to pass the mac
address to the sh_eth driver using platform data.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-se/7724/setup.c | 14 ++++----------
1 file changed, 4 insertions(+), 10 deletions(-)
diff --git a/arch/sh/boards/mach-se/7724/setup.c b/arch/sh/boards/mach-se/7724/setup.c
index ce6b36ebe64d..4488b3e774df 100644
--- a/arch/sh/boards/mach-se/7724/setup.c
+++ b/arch/sh/boards/mach-se/7724/setup.c
@@ -507,7 +507,7 @@ static int __init sh_eth_is_eeprom_ready(void)
static void __init sh_eth_init(void)
{
int i;
- u16 mac[3];
+ u16 mac;
/* check EEPROM status */
if (!sh_eth_is_eeprom_ready())
@@ -521,16 +521,10 @@ static void __init sh_eth_init(void)
if (!sh_eth_is_eeprom_ready())
return;
- mac[i] = ctrl_inw(EEPROM_DATA);
- mac[i] = ((mac[i] & 0xFF) << 8) | (mac[i] >> 8); /* swap */
+ mac = ctrl_inw(EEPROM_DATA);
+ sh_eth_plat.mac_addr[i << 1] = mac & 0xff;
+ sh_eth_plat.mac_addr[(i << 1) + 1] = mac >> 8;
}
-
- /* reset sh-eth */
- ctrl_outl(0x1, SH_ETH_ADDR + 0x0);
-
- /* set MAC addr */
- ctrl_outl(((mac[0] << 16) | (mac[1])), SH_ETH_MAHR);
- ctrl_outl((mac[2]), SH_ETH_MALR);
}
#define SW4140 0xBA201000
From 5b380ec11d198a07aa6bf3a9e851531e91bf4234 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Tue, 27 Oct 2009 10:49:55 +0000
Subject: [PATCH 067/137] sh: add SDHI1 support to ms7724se
Add support for cn8 and SDHI1 to the ms7724se board.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-se/7724/setup.c | 35 +++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/arch/sh/boards/mach-se/7724/setup.c b/arch/sh/boards/mach-se/7724/setup.c
index 4488b3e774df..ffb97f22783c 100644
--- a/arch/sh/boards/mach-se/7724/setup.c
+++ b/arch/sh/boards/mach-se/7724/setup.c
@@ -463,6 +463,7 @@ static struct resource sdhi0_cn7_resources[] = {
static struct platform_device sdhi0_cn7_device = {
.name = "sh_mobile_sdhi",
+ .id = 0,
.num_resources = ARRAY_SIZE(sdhi0_cn7_resources),
.resource = sdhi0_cn7_resources,
.archdata = {
@@ -470,6 +471,29 @@ static struct platform_device sdhi0_cn7_device = {
},
};
+static struct resource sdhi1_cn8_resources[] = {
+ [0] = {
+ .name = "SDHI1",
+ .start = 0x04cf0000,
+ .end = 0x04cf01ff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 24,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device sdhi1_cn8_device = {
+ .name = "sh_mobile_sdhi",
+ .id = 1,
+ .num_resources = ARRAY_SIZE(sdhi1_cn8_resources),
+ .resource = sdhi1_cn8_resources,
+ .archdata = {
+ .hwblk_id = HWBLK_SDHI1,
+ },
+};
+
static struct platform_device *ms7724se_devices[] __initdata = {
&heartbeat_device,
&smc91x_eth_device,
@@ -483,6 +507,7 @@ static struct platform_device *ms7724se_devices[] __initdata = {
&sh7724_usb1_gadget_device,
&fsi_device,
&sdhi0_cn7_device,
+ &sdhi1_cn8_device,
};
#define EEPROM_OP 0xBA206000
@@ -725,6 +750,16 @@ static int __init devices_setup(void)
gpio_request(GPIO_FN_SDHI0CMD, NULL);
gpio_request(GPIO_FN_SDHI0CLK, NULL);
+ /* SDHI1 connected to cn8 */
+ gpio_request(GPIO_FN_SDHI1CD, NULL);
+ gpio_request(GPIO_FN_SDHI1WP, NULL);
+ gpio_request(GPIO_FN_SDHI1D3, NULL);
+ gpio_request(GPIO_FN_SDHI1D2, NULL);
+ gpio_request(GPIO_FN_SDHI1D1, NULL);
+ gpio_request(GPIO_FN_SDHI1D0, NULL);
+ gpio_request(GPIO_FN_SDHI1CMD, NULL);
+ gpio_request(GPIO_FN_SDHI1CLK, NULL);
+
/*
* enable SH-Eth
*
From 3714a9a026bba09a58e7cf06e0c23c67da6841c2 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Date: Wed, 28 Oct 2009 06:31:57 +0000
Subject: [PATCH 068/137] sh: mach-ecovec24: Add USB1 gadget support
USB1 can change to host/function by checking PTB3.
This patch add USB1 gadget support and check PTB3 when boot,
and change name to usb1_common_XXX from usb1_host_XXX.
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-ecovec24/setup.c | 38 +++++++++++++---------------
1 file changed, 17 insertions(+), 21 deletions(-)
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index da851a3b714a..c3d05e5be2e9 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -188,30 +188,18 @@ static struct platform_device usb0_host_device = {
.resource = usb0_host_resources,
};
-/*
- * USB1
- *
- * CN5 can use both host/function,
- * and we can determine it by checking PTB[3]
- *
- * This time only USB1 host is supported.
- */
+/* USB1 host/function */
void usb1_port_power(int port, int power)
{
- if (!gpio_get_value(GPIO_PTB3)) {
- printk(KERN_ERR "USB1 function is not supported\n");
- return;
- }
-
gpio_set_value(GPIO_PTB5, power);
}
-static struct r8a66597_platdata usb1_host_data = {
+static struct r8a66597_platdata usb1_common_data = {
.on_chip = 1,
.port_power = usb1_port_power,
};
-static struct resource usb1_host_resources[] = {
+static struct resource usb1_common_resources[] = {
[0] = {
.start = 0xa4d90000,
.end = 0xa4d90124 - 1,
@@ -224,16 +212,16 @@ static struct resource usb1_host_resources[] = {
},
};
-static struct platform_device usb1_host_device = {
- .name = "r8a66597_hcd",
+static struct platform_device usb1_common_device = {
+ /* .name will be added in arch_setup */
.id = 1,
.dev = {
.dma_mask = NULL, /* not use dma */
.coherent_dma_mask = 0xffffffff,
- .platform_data = &usb1_host_data,
+ .platform_data = &usb1_common_data,
},
- .num_resources = ARRAY_SIZE(usb1_host_resources),
- .resource = usb1_host_resources,
+ .num_resources = ARRAY_SIZE(usb1_common_resources),
+ .resource = usb1_common_resources,
};
/* LCDC */
@@ -484,7 +472,7 @@ static struct platform_device *ecovec_devices[] __initdata = {
&nor_flash_device,
&sh_eth_device,
&usb0_host_device,
- &usb1_host_device, /* USB1 host support */
+ &usb1_common_device,
&lcdc_device,
&ceu0_device,
&ceu1_device,
@@ -589,6 +577,14 @@ static int __init arch_setup(void)
ctrl_outw(0x0600, 0xa40501d4);
ctrl_outw(0x0600, 0xa4050192);
+ if (gpio_get_value(GPIO_PTB3)) {
+ printk(KERN_INFO "USB1 function is selected\n");
+ usb1_common_device.name = "r8a66597_udc";
+ } else {
+ printk(KERN_INFO "USB1 host is selected\n");
+ usb1_common_device.name = "r8a66597_hcd";
+ }
+
/* enable LCDC */
gpio_request(GPIO_FN_LCDD23, NULL);
gpio_request(GPIO_FN_LCDD22, NULL);
From ac44e6694755744fe96442919da1f2c7e87a2a61 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 28 Oct 2009 17:57:54 +0900
Subject: [PATCH 069/137] sh: perf events: Add preliminary support for SH-4A
counters.
This adds in preliminary support for the SH-4A performance counters.
Presently only the first 2 counters are supported, as these are the ones
of the most interest to the perf tool and end users. Counter chaining is
not presently handled, so these are simply implemented as 32-bit
counters.
This also establishes a perf event support framework for other hardware
counters, which the existing SH-4 oprofile code will migrate over to as
the SH-4A support evolves.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/perf_event.h | 31 ++-
arch/sh/kernel/Makefile | 1 +
arch/sh/kernel/cpu/sh4a/Makefile | 1 +
arch/sh/kernel/cpu/sh4a/perf_event.c | 231 ++++++++++++++++++++
arch/sh/kernel/perf_event.c | 314 +++++++++++++++++++++++++++
5 files changed, 576 insertions(+), 2 deletions(-)
create mode 100644 arch/sh/kernel/cpu/sh4a/perf_event.c
create mode 100644 arch/sh/kernel/perf_event.c
diff --git a/arch/sh/include/asm/perf_event.h b/arch/sh/include/asm/perf_event.h
index 11a302297ab7..3d0c9f36d150 100644
--- a/arch/sh/include/asm/perf_event.h
+++ b/arch/sh/include/asm/perf_event.h
@@ -1,8 +1,35 @@
#ifndef __ASM_SH_PERF_EVENT_H
#define __ASM_SH_PERF_EVENT_H
-/* SH only supports software events through this interface. */
-static inline void set_perf_event_pending(void) {}
+struct hw_perf_event;
+
+#define MAX_HWEVENTS 2
+
+struct sh_pmu {
+ const char *name;
+ unsigned int num_events;
+ void (*disable_all)(void);
+ void (*enable_all)(void);
+ void (*enable)(struct hw_perf_event *, int);
+ void (*disable)(struct hw_perf_event *, int);
+ u64 (*read)(int);
+ int (*event_map)(int);
+ unsigned int max_events;
+ unsigned long raw_event_mask;
+ const int (*cache_events)[PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX];
+};
+
+/* arch/sh/kernel/perf_event.c */
+extern int register_sh_pmu(struct sh_pmu *);
+extern int reserve_pmc_hardware(void);
+extern void release_pmc_hardware(void);
+
+static inline void set_perf_event_pending(void)
+{
+ /* Nothing to see here, move along. */
+}
#define PERF_EVENT_INDEX_OFFSET 0
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 097ae5ceb0e3..0a67bafce425 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
obj-$(CONFIG_DUMP_CODE) += disassemble.o
obj-$(CONFIG_HIBERNATION) += swsusp.o
obj-$(CONFIG_DWARF_UNWINDER) += dwarf.o
+obj-$(CONFIG_PERF_EVENTS) += perf_event.o
obj-$(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) += localtimer.o
diff --git a/arch/sh/kernel/cpu/sh4a/Makefile b/arch/sh/kernel/cpu/sh4a/Makefile
index 490d5dc9e372..33bab477d2e2 100644
--- a/arch/sh/kernel/cpu/sh4a/Makefile
+++ b/arch/sh/kernel/cpu/sh4a/Makefile
@@ -44,3 +44,4 @@ pinmux-$(CONFIG_CPU_SUBTYPE_SH7786) := pinmux-sh7786.o
obj-y += $(clock-y)
obj-$(CONFIG_SMP) += $(smp-y)
obj-$(CONFIG_GENERIC_GPIO) += $(pinmux-y)
+obj-$(CONFIG_PERF_EVENTS) += perf_event.o
diff --git a/arch/sh/kernel/cpu/sh4a/perf_event.c b/arch/sh/kernel/cpu/sh4a/perf_event.c
new file mode 100644
index 000000000000..d0938345799f
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4a/perf_event.c
@@ -0,0 +1,231 @@
+/*
+ * Performance events support for SH-4A performance counters
+ *
+ * Copyright (C) 2009 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/perf_event.h>
+#include <asm/processor.h>
+
+#define PPC_CCBR(idx) (0xff200800 + (sizeof(u32) * idx))
+#define PPC_PMCTR(idx) (0xfc100000 + (sizeof(u32) * idx))
+
+#define CCBR_CIT_MASK (0x7ff << 6)
+#define CCBR_DUC (1 << 3)
+#define CCBR_CMDS (1 << 1)
+#define CCBR_PPCE (1 << 0)
+
+#define PPC_PMCAT 0xfc100080
+
+#define PMCAT_OVF3 (1 << 27)
+#define PMCAT_CNN3 (1 << 26)
+#define PMCAT_CLR3 (1 << 25)
+#define PMCAT_OVF2 (1 << 19)
+#define PMCAT_CLR2 (1 << 17)
+#define PMCAT_OVF1 (1 << 11)
+#define PMCAT_CNN1 (1 << 10)
+#define PMCAT_CLR1 (1 << 9)
+#define PMCAT_OVF0 (1 << 3)
+#define PMCAT_CLR0 (1 << 1)
+
+static struct sh_pmu sh4a_pmu;
+
+/*
+ * Special reserved bits used by hardware emulators, read values will
+ * vary, but writes must always be 0.
+ */
+#define PMCAT_EMU_CLR_MASK ((1 << 24) | (1 << 16) | (1 << 8) | (1 << 0))
+
+static const int sh4a_general_events[] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = 0x0000,
+ [PERF_COUNT_HW_INSTRUCTIONS] = 0x0202,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0029, /* I-cache */
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x002a, /* I-cache */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x0204,
+ [PERF_COUNT_HW_BRANCH_MISSES] = -1,
+ [PERF_COUNT_HW_BUS_CYCLES] = -1,
+};
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+static const int sh4a_cache_events
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(L1D) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0031,
+ [ C(RESULT_MISS) ] = 0x0032,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0039,
+ [ C(RESULT_MISS) ] = 0x003a,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+
+ [ C(L1I) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0029,
+ [ C(RESULT_MISS) ] = 0x002a,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+
+ [ C(LL) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0030,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0038,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+
+ [ C(DTLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0222,
+ [ C(RESULT_MISS) ] = 0x0220,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+
+ [ C(ITLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0x02a0,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+
+ [ C(BPU) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+};
+
+static int sh4a_event_map(int event)
+{
+ return sh4a_general_events[event];
+}
+
+static u64 sh4a_pmu_read(int idx)
+{
+ return __raw_readl(PPC_PMCTR(idx));
+}
+
+static void sh4a_pmu_disable(struct hw_perf_event *hwc, int idx)
+{
+ unsigned int tmp;
+
+ tmp = __raw_readl(PPC_CCBR(idx));
+ tmp &= ~(CCBR_CIT_MASK | CCBR_DUC);
+ __raw_writel(tmp, PPC_CCBR(idx));
+}
+
+static void sh4a_pmu_enable(struct hw_perf_event *hwc, int idx)
+{
+ unsigned int tmp;
+
+ tmp = __raw_readl(PPC_PMCAT);
+ tmp &= ~PMCAT_EMU_CLR_MASK;
+ tmp |= idx ? PMCAT_CLR1 : PMCAT_CLR0;
+ __raw_writel(tmp, PPC_PMCAT);
+
+ tmp = __raw_readl(PPC_CCBR(idx));
+ tmp |= (hwc->config << 6) | CCBR_CMDS | CCBR_PPCE;
+ __raw_writel(tmp, PPC_CCBR(idx));
+
+ __raw_writel(__raw_readl(PPC_CCBR(idx)) | CCBR_DUC, PPC_CCBR(idx));
+}
+
+static void sh4a_pmu_disable_all(void)
+{
+ int i;
+
+ for (i = 0; i < sh4a_pmu.num_events; i++)
+ __raw_writel(__raw_readl(PPC_CCBR(i)) & ~CCBR_DUC, PPC_CCBR(i));
+}
+
+static void sh4a_pmu_enable_all(void)
+{
+ int i;
+
+ for (i = 0; i < sh4a_pmu.num_events; i++)
+ __raw_writel(__raw_readl(PPC_CCBR(i)) | CCBR_DUC, PPC_CCBR(i));
+}
+
+static struct sh_pmu sh4a_pmu = {
+ .name = "SH-4A",
+ .num_events = 2,
+ .event_map = sh4a_event_map,
+ .max_events = ARRAY_SIZE(sh4a_general_events),
+ .raw_event_mask = 0x3ff,
+ .cache_events = &sh4a_cache_events,
+ .read = sh4a_pmu_read,
+ .disable = sh4a_pmu_disable,
+ .enable = sh4a_pmu_enable,
+ .disable_all = sh4a_pmu_disable_all,
+ .enable_all = sh4a_pmu_enable_all,
+};
+
+static int __init sh4a_pmu_init(void)
+{
+ /*
+ * Make sure this CPU actually has perf counters.
+ */
+ if (!(boot_cpu_data.flags & CPU_HAS_PERF_COUNTER)) {
+ pr_notice("HW perf events unsupported, software events only.\n");
+ return -ENODEV;
+ }
+
+ return register_sh_pmu(&sh4a_pmu);
+}
+arch_initcall(sh4a_pmu_init);
diff --git a/arch/sh/kernel/perf_event.c b/arch/sh/kernel/perf_event.c
new file mode 100644
index 000000000000..d1510702f201
--- /dev/null
+++ b/arch/sh/kernel/perf_event.c
@@ -0,0 +1,314 @@
+/*
+ * Performance event support framework for SuperH hardware counters.
+ *
+ * Copyright (C) 2009 Paul Mundt
+ *
+ * Heavily based on the x86 and PowerPC implementations.
+ *
+ * x86:
+ * Copyright (C) 2008 Thomas Gleixner <tglx@linutronix.de>
+ * Copyright (C) 2008-2009 Red Hat, Inc., Ingo Molnar
+ * Copyright (C) 2009 Jaswinder Singh Rajput
+ * Copyright (C) 2009 Advanced Micro Devices, Inc., Robert Richter
+ * Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
+ * Copyright (C) 2009 Intel Corporation, <markus.t.metzger@intel.com>
+ *
+ * ppc:
+ * Copyright 2008-2009 Paul Mackerras, IBM Corporation.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/perf_event.h>
+#include <asm/processor.h>
+
+struct cpu_hw_events {
+ struct perf_event *events[MAX_HWEVENTS];
+ unsigned long used_mask[BITS_TO_LONGS(MAX_HWEVENTS)];
+ unsigned long active_mask[BITS_TO_LONGS(MAX_HWEVENTS)];
+};
+
+DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events);
+
+static struct sh_pmu *sh_pmu __read_mostly;
+
+/* Number of perf_events counting hardware events */
+static atomic_t num_events;
+/* Used to avoid races in calling reserve/release_pmc_hardware */
+static DEFINE_MUTEX(pmc_reserve_mutex);
+
+/*
+ * Stub these out for now, do something more profound later.
+ */
+int reserve_pmc_hardware(void)
+{
+ return 0;
+}
+
+void release_pmc_hardware(void)
+{
+}
+
+static inline int sh_pmu_initialized(void)
+{
+ return !!sh_pmu;
+}
+
+/*
+ * Release the PMU if this is the last perf_event.
+ */
+static void hw_perf_event_destroy(struct perf_event *event)
+{
+ if (!atomic_add_unless(&num_events, -1, 1)) {
+ mutex_lock(&pmc_reserve_mutex);
+ if (atomic_dec_return(&num_events) == 0)
+ release_pmc_hardware();
+ mutex_unlock(&pmc_reserve_mutex);
+ }
+}
+
+static int hw_perf_cache_event(int config, int *evp)
+{
+ unsigned long type, op, result;
+ int ev;
+
+ if (!sh_pmu->cache_events)
+ return -EINVAL;
+
+ /* unpack config */
+ type = config & 0xff;
+ op = (config >> 8) & 0xff;
+ result = (config >> 16) & 0xff;
+
+ if (type >= PERF_COUNT_HW_CACHE_MAX ||
+ op >= PERF_COUNT_HW_CACHE_OP_MAX ||
+ result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
+ return -EINVAL;
+
+ ev = (*sh_pmu->cache_events)[type][op][result];
+ if (ev == 0)
+ return -EOPNOTSUPP;
+ if (ev == -1)
+ return -EINVAL;
+ *evp = ev;
+ return 0;
+}
+
+static int __hw_perf_event_init(struct perf_event *event)
+{
+ struct perf_event_attr *attr = &event->attr;
+ struct hw_perf_event *hwc = &event->hw;
+ int config;
+ int err;
+
+ if (!sh_pmu_initialized())
+ return -ENODEV;
+
+ /*
+ * All of the on-chip counters are "limited", in that they have
+ * no interrupts, and are therefore unable to do sampling without
+ * further work and timer assistance.
+ */
+ if (hwc->sample_period)
+ return -EINVAL;
+
+ /*
+ * See if we need to reserve the counter.
+ *
+ * If no events are currently in use, then we have to take a
+ * mutex to ensure that we don't race with another task doing
+ * reserve_pmc_hardware or release_pmc_hardware.
+ */
+ err = 0;
+ if (!atomic_inc_not_zero(&num_events)) {
+ mutex_lock(&pmc_reserve_mutex);
+ if (atomic_read(&num_events) == 0 &&
+ reserve_pmc_hardware())
+ err = -EBUSY;
+ else
+ atomic_inc(&num_events);
+ mutex_unlock(&pmc_reserve_mutex);
+ }
+
+ if (err)
+ return err;
+
+ event->destroy = hw_perf_event_destroy;
+
+ switch (attr->type) {
+ case PERF_TYPE_RAW:
+ config = attr->config & sh_pmu->raw_event_mask;
+ break;
+ case PERF_TYPE_HW_CACHE:
+ err = hw_perf_cache_event(attr->config, &config);
+ if (err)
+ return err;
+ break;
+ case PERF_TYPE_HARDWARE:
+ if (attr->config >= sh_pmu->max_events)
+ return -EINVAL;
+
+ config = sh_pmu->event_map(attr->config);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (config == -1)
+ return -EINVAL;
+
+ hwc->config |= config;
+
+ return 0;
+}
+
+static void sh_perf_event_update(struct perf_event *event,
+ struct hw_perf_event *hwc, int idx)
+{
+ u64 prev_raw_count, new_raw_count;
+ s64 delta;
+ int shift = 0;
+
+ /*
+ * Depending on the counter configuration, they may or may not
+ * be chained, in which case the previous counter value can be
+ * updated underneath us if the lower-half overflows.
+ *
+ * Our tactic to handle this is to first atomically read and
+ * exchange a new raw count - then add that new-prev delta
+ * count to the generic counter atomically.
+ *
+ * As there is no interrupt associated with the overflow events,
+ * this is the simplest approach for maintaining consistency.
+ */
+again:
+ prev_raw_count = atomic64_read(&hwc->prev_count);
+ new_raw_count = sh_pmu->read(idx);
+
+ if (atomic64_cmpxchg(&hwc->prev_count, prev_raw_count,
+ new_raw_count) != prev_raw_count)
+ goto again;
+
+ /*
+ * Now we have the new raw value and have updated the prev
+ * timestamp already. We can now calculate the elapsed delta
+ * (counter-)time and add that to the generic counter.
+ *
+ * Careful, not all hw sign-extends above the physical width
+ * of the count.
+ */
+ delta = (new_raw_count << shift) - (prev_raw_count << shift);
+ delta >>= shift;
+
+ atomic64_add(delta, &event->count);
+}
+
+static void sh_pmu_disable(struct perf_event *event)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct hw_perf_event *hwc = &event->hw;
+ int idx = hwc->idx;
+
+ clear_bit(idx, cpuc->active_mask);
+ sh_pmu->disable(hwc, idx);
+
+ barrier();
+
+ sh_perf_event_update(event, &event->hw, idx);
+
+ cpuc->events[idx] = NULL;
+ clear_bit(idx, cpuc->used_mask);
+
+ perf_event_update_userpage(event);
+}
+
+static int sh_pmu_enable(struct perf_event *event)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct hw_perf_event *hwc = &event->hw;
+ int idx = hwc->idx;
+
+ if (test_and_set_bit(idx, cpuc->used_mask)) {
+ idx = find_first_zero_bit(cpuc->used_mask, sh_pmu->num_events);
+ if (idx == sh_pmu->num_events)
+ return -EAGAIN;
+
+ set_bit(idx, cpuc->used_mask);
+ hwc->idx = idx;
+ }
+
+ sh_pmu->disable(hwc, idx);
+
+ cpuc->events[idx] = event;
+ set_bit(idx, cpuc->active_mask);
+
+ sh_pmu->enable(hwc, idx);
+
+ perf_event_update_userpage(event);
+
+ return 0;
+}
+
+static void sh_pmu_read(struct perf_event *event)
+{
+ sh_perf_event_update(event, &event->hw, event->hw.idx);
+}
+
+static const struct pmu pmu = {
+ .enable = sh_pmu_enable,
+ .disable = sh_pmu_disable,
+ .read = sh_pmu_read,
+};
+
+const struct pmu *hw_perf_event_init(struct perf_event *event)
+{
+ int err = __hw_perf_event_init(event);
+ if (unlikely(err)) {
+ if (event->destroy)
+ event->destroy(event);
+ return ERR_PTR(err);
+ }
+
+ return &pmu;
+}
+
+void hw_perf_event_setup(int cpu)
+{
+ struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu);
+
+ memset(cpuhw, 0, sizeof(struct cpu_hw_events));
+}
+
+void hw_perf_enable(void)
+{
+ if (!sh_pmu_initialized())
+ return;
+
+ sh_pmu->enable_all();
+}
+
+void hw_perf_disable(void)
+{
+ if (!sh_pmu_initialized())
+ return;
+
+ sh_pmu->disable_all();
+}
+
+int register_sh_pmu(struct sh_pmu *pmu)
+{
+ if (sh_pmu)
+ return -EBUSY;
+ sh_pmu = pmu;
+
+ pr_info("Performance Events: %s support registered\n", pmu->name);
+
+ WARN_ON(pmu->num_events >= MAX_HWEVENTS);
+
+ return 0;
+}
From 1d317f90d97ca8e539939ee896bd04c7efe936ca Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 28 Oct 2009 18:02:15 +0900
Subject: [PATCH 070/137] sh: perf events: Kill off left over debugging cruft.
num_events should be compared > MAX_HWEVENTS and not >=. The latter was
used as a debugging test which accidentally slipped in.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/perf_event.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sh/kernel/perf_event.c b/arch/sh/kernel/perf_event.c
index d1510702f201..4449f0ac9bf8 100644
--- a/arch/sh/kernel/perf_event.c
+++ b/arch/sh/kernel/perf_event.c
@@ -308,7 +308,7 @@ int register_sh_pmu(struct sh_pmu *pmu)
pr_info("Performance Events: %s support registered\n", pmu->name);
- WARN_ON(pmu->num_events >= MAX_HWEVENTS);
+ WARN_ON(pmu->num_events > MAX_HWEVENTS);
return 0;
}
From eb3118f652ea7751ecf6a7e467bb637895e3be3b Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Thu, 29 Oct 2009 21:53:30 +0000
Subject: [PATCH 071/137] sh: Do not apply virt_to_phys() to a physical address
The variable 'phys' already contains the physical address to flush. It
is not a virtual address and should not be passed to virt_to_phys().
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/cache-sh4.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 4a2fbf2864de..b5abe949c6ed 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -95,8 +95,7 @@ static inline void flush_cache_one(unsigned long start, unsigned long phys)
exec_offset = cached_to_uncached;
local_irq_save(flags);
- __flush_cache_one(start | SH_CACHE_ASSOC,
- virt_to_phys(phys), exec_offset);
+ __flush_cache_one(start | SH_CACHE_ASSOC, phys, exec_offset);
local_irq_restore(flags);
}
From 49f42644fd01bc7bd9b6b0a080fee1a89dc66665 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Thu, 29 Oct 2009 10:51:48 +0000
Subject: [PATCH 072/137] sh: Add notifiers chains for cpu/board code
This patch adds atomic notifier chains for pre/post
sleep events. Useful for cpu code and boards that
need to save and restore register state before and
after entering a sleep mode.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/suspend.h | 11 +++++++++++
arch/sh/kernel/cpu/shmobile/pm.c | 12 ++++++++++++
2 files changed, 23 insertions(+)
diff --git a/arch/sh/include/asm/suspend.h b/arch/sh/include/asm/suspend.h
index 5c8ea28ff7a4..d1cc5221645d 100644
--- a/arch/sh/include/asm/suspend.h
+++ b/arch/sh/include/asm/suspend.h
@@ -2,6 +2,7 @@
#define _ASM_SH_SUSPEND_H
#ifndef __ASSEMBLY__
+#include <linux/notifier.h>
static inline int arch_prepare_suspend(void) { return 0; }
#include <asm/ptrace.h>
@@ -19,6 +20,16 @@ void sh_mobile_setup_cpuidle(void);
static inline void sh_mobile_setup_cpuidle(void) {}
#endif
+/* notifier chains for pre/post sleep hooks */
+extern struct atomic_notifier_head sh_mobile_pre_sleep_notifier_list;
+extern struct atomic_notifier_head sh_mobile_post_sleep_notifier_list;
+
+/* priority levels for notifiers */
+#define SH_MOBILE_SLEEP_BOARD 0
+#define SH_MOBILE_SLEEP_CPU 1
+#define SH_MOBILE_PRE(x) (x)
+#define SH_MOBILE_POST(x) (-(x))
+
#endif
/* flags passed to assembly suspend code */
diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c
index ee3c2aaf66fb..7ebf8cf89242 100644
--- a/arch/sh/kernel/cpu/shmobile/pm.c
+++ b/arch/sh/kernel/cpu/shmobile/pm.c
@@ -16,6 +16,12 @@
#include <asm/suspend.h>
#include <asm/uaccess.h>
+/*
+ * Notifier lists for pre/post sleep notification
+ */
+ATOMIC_NOTIFIER_HEAD(sh_mobile_pre_sleep_notifier_list);
+ATOMIC_NOTIFIER_HEAD(sh_mobile_post_sleep_notifier_list);
+
/*
* Sleep modes available on SuperH Mobile:
*
@@ -44,8 +50,14 @@ void sh_mobile_call_standby(unsigned long mode)
void *onchip_mem = (void *)ILRAM_BASE;
void (*standby_onchip_mem)(unsigned long, unsigned long) = onchip_mem;
+ atomic_notifier_call_chain(&sh_mobile_pre_sleep_notifier_list,
+ mode, NULL);
+
/* Let assembly snippet in on-chip memory handle the rest */
standby_onchip_mem(mode, ILRAM_BASE);
+
+ atomic_notifier_call_chain(&sh_mobile_post_sleep_notifier_list,
+ mode, NULL);
}
static int sh_pm_enter(suspend_state_t state)
From da14909eb0749c2788fc704be6dbdebb620602f6 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Thu, 29 Oct 2009 10:51:57 +0000
Subject: [PATCH 073/137] sh: Add sh7724 notifier for R-standby save/restore
Make use of the recently added notifier chains for sh7724
r-standby register save/restore handling. At this point
only the BSC and INTC are handled.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4a/setup-sh7724.c | 167 +++++++++++++++++++++++++
1 file changed, 167 insertions(+)
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index f3851fd757ec..6dc4469434ea 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -20,6 +20,8 @@
#include <linux/uio_driver.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <linux/notifier.h>
+#include <asm/suspend.h>
#include <asm/clock.h>
#include <asm/mmzone.h>
#include <cpu/sh7724.h>
@@ -827,3 +829,168 @@ void __init plat_irq_setup(void)
{
register_intc_controller(&intc_desc);
}
+
+static struct {
+ /* BSC */
+ unsigned long mmselr;
+ unsigned long cs0bcr;
+ unsigned long cs4bcr;
+ unsigned long cs5abcr;
+ unsigned long cs5bbcr;
+ unsigned long cs6abcr;
+ unsigned long cs6bbcr;
+ unsigned long cs4wcr;
+ unsigned long cs5awcr;
+ unsigned long cs5bwcr;
+ unsigned long cs6awcr;
+ unsigned long cs6bwcr;
+ /* INTC */
+ unsigned short ipra;
+ unsigned short iprb;
+ unsigned short iprc;
+ unsigned short iprd;
+ unsigned short ipre;
+ unsigned short iprf;
+ unsigned short iprg;
+ unsigned short iprh;
+ unsigned short ipri;
+ unsigned short iprj;
+ unsigned short iprk;
+ unsigned short iprl;
+ unsigned char imr0;
+ unsigned char imr1;
+ unsigned char imr2;
+ unsigned char imr3;
+ unsigned char imr4;
+ unsigned char imr5;
+ unsigned char imr6;
+ unsigned char imr7;
+ unsigned char imr8;
+ unsigned char imr9;
+ unsigned char imr10;
+ unsigned char imr11;
+ unsigned char imr12;
+} sh7724_rstandby_state;
+
+static int sh7724_pre_sleep_notifier_call(struct notifier_block *nb,
+ unsigned long flags, void *unused)
+{
+ if (!(flags & SUSP_SH_RSTANDBY))
+ return NOTIFY_DONE;
+
+ /* BCR */
+ sh7724_rstandby_state.mmselr = __raw_readl(0xff800020); /* MMSELR */
+ sh7724_rstandby_state.mmselr |= 0xa5a50000;
+ sh7724_rstandby_state.cs0bcr = __raw_readl(0xfec10004); /* CS0BCR */
+ sh7724_rstandby_state.cs4bcr = __raw_readl(0xfec10010); /* CS4BCR */
+ sh7724_rstandby_state.cs5abcr = __raw_readl(0xfec10014); /* CS5ABCR */
+ sh7724_rstandby_state.cs5bbcr = __raw_readl(0xfec10018); /* CS5BBCR */
+ sh7724_rstandby_state.cs6abcr = __raw_readl(0xfec1001c); /* CS6ABCR */
+ sh7724_rstandby_state.cs6bbcr = __raw_readl(0xfec10020); /* CS6BBCR */
+ sh7724_rstandby_state.cs4wcr = __raw_readl(0xfec10030); /* CS4WCR */
+ sh7724_rstandby_state.cs5awcr = __raw_readl(0xfec10034); /* CS5AWCR */
+ sh7724_rstandby_state.cs5bwcr = __raw_readl(0xfec10038); /* CS5BWCR */
+ sh7724_rstandby_state.cs6awcr = __raw_readl(0xfec1003c); /* CS6AWCR */
+ sh7724_rstandby_state.cs6bwcr = __raw_readl(0xfec10040); /* CS6BWCR */
+
+ /* INTC */
+ sh7724_rstandby_state.ipra = __raw_readw(0xa4080000); /* IPRA */
+ sh7724_rstandby_state.iprb = __raw_readw(0xa4080004); /* IPRB */
+ sh7724_rstandby_state.iprc = __raw_readw(0xa4080008); /* IPRC */
+ sh7724_rstandby_state.iprd = __raw_readw(0xa408000c); /* IPRD */
+ sh7724_rstandby_state.ipre = __raw_readw(0xa4080010); /* IPRE */
+ sh7724_rstandby_state.iprf = __raw_readw(0xa4080014); /* IPRF */
+ sh7724_rstandby_state.iprg = __raw_readw(0xa4080018); /* IPRG */
+ sh7724_rstandby_state.iprh = __raw_readw(0xa408001c); /* IPRH */
+ sh7724_rstandby_state.ipri = __raw_readw(0xa4080020); /* IPRI */
+ sh7724_rstandby_state.iprj = __raw_readw(0xa4080024); /* IPRJ */
+ sh7724_rstandby_state.iprk = __raw_readw(0xa4080028); /* IPRK */
+ sh7724_rstandby_state.iprl = __raw_readw(0xa408002c); /* IPRL */
+ sh7724_rstandby_state.imr0 = __raw_readb(0xa4080080); /* IMR0 */
+ sh7724_rstandby_state.imr1 = __raw_readb(0xa4080084); /* IMR1 */
+ sh7724_rstandby_state.imr2 = __raw_readb(0xa4080088); /* IMR2 */
+ sh7724_rstandby_state.imr3 = __raw_readb(0xa408008c); /* IMR3 */
+ sh7724_rstandby_state.imr4 = __raw_readb(0xa4080090); /* IMR4 */
+ sh7724_rstandby_state.imr5 = __raw_readb(0xa4080094); /* IMR5 */
+ sh7724_rstandby_state.imr6 = __raw_readb(0xa4080098); /* IMR6 */
+ sh7724_rstandby_state.imr7 = __raw_readb(0xa408009c); /* IMR7 */
+ sh7724_rstandby_state.imr8 = __raw_readb(0xa40800a0); /* IMR8 */
+ sh7724_rstandby_state.imr9 = __raw_readb(0xa40800a4); /* IMR9 */
+ sh7724_rstandby_state.imr10 = __raw_readb(0xa40800a8); /* IMR10 */
+ sh7724_rstandby_state.imr11 = __raw_readb(0xa40800ac); /* IMR11 */
+ sh7724_rstandby_state.imr12 = __raw_readb(0xa40800b0); /* IMR12 */
+
+ return NOTIFY_DONE;
+}
+
+static int sh7724_post_sleep_notifier_call(struct notifier_block *nb,
+ unsigned long flags, void *unused)
+{
+ if (!(flags & SUSP_SH_RSTANDBY))
+ return NOTIFY_DONE;
+
+ /* BCR */
+ __raw_writel(sh7724_rstandby_state.mmselr, 0xff800020); /* MMSELR */
+ __raw_writel(sh7724_rstandby_state.cs0bcr, 0xfec10004); /* CS0BCR */
+ __raw_writel(sh7724_rstandby_state.cs4bcr, 0xfec10010); /* CS4BCR */
+ __raw_writel(sh7724_rstandby_state.cs5abcr, 0xfec10014); /* CS5ABCR */
+ __raw_writel(sh7724_rstandby_state.cs5bbcr, 0xfec10018); /* CS5BBCR */
+ __raw_writel(sh7724_rstandby_state.cs6abcr, 0xfec1001c); /* CS6ABCR */
+ __raw_writel(sh7724_rstandby_state.cs6bbcr, 0xfec10020); /* CS6BBCR */
+ __raw_writel(sh7724_rstandby_state.cs4wcr, 0xfec10030); /* CS4WCR */
+ __raw_writel(sh7724_rstandby_state.cs5awcr, 0xfec10034); /* CS5AWCR */
+ __raw_writel(sh7724_rstandby_state.cs5bwcr, 0xfec10038); /* CS5BWCR */
+ __raw_writel(sh7724_rstandby_state.cs6awcr, 0xfec1003c); /* CS6AWCR */
+ __raw_writel(sh7724_rstandby_state.cs6bwcr, 0xfec10040); /* CS6BWCR */
+
+ /* INTC */
+ __raw_writew(sh7724_rstandby_state.ipra, 0xa4080000); /* IPRA */
+ __raw_writew(sh7724_rstandby_state.iprb, 0xa4080004); /* IPRB */
+ __raw_writew(sh7724_rstandby_state.iprc, 0xa4080008); /* IPRC */
+ __raw_writew(sh7724_rstandby_state.iprd, 0xa408000c); /* IPRD */
+ __raw_writew(sh7724_rstandby_state.ipre, 0xa4080010); /* IPRE */
+ __raw_writew(sh7724_rstandby_state.iprf, 0xa4080014); /* IPRF */
+ __raw_writew(sh7724_rstandby_state.iprg, 0xa4080018); /* IPRG */
+ __raw_writew(sh7724_rstandby_state.iprh, 0xa408001c); /* IPRH */
+ __raw_writew(sh7724_rstandby_state.ipri, 0xa4080020); /* IPRI */
+ __raw_writew(sh7724_rstandby_state.iprj, 0xa4080024); /* IPRJ */
+ __raw_writew(sh7724_rstandby_state.iprk, 0xa4080028); /* IPRK */
+ __raw_writew(sh7724_rstandby_state.iprl, 0xa408002c); /* IPRL */
+ __raw_writeb(sh7724_rstandby_state.imr0, 0xa4080080); /* IMR0 */
+ __raw_writeb(sh7724_rstandby_state.imr1, 0xa4080084); /* IMR1 */
+ __raw_writeb(sh7724_rstandby_state.imr2, 0xa4080088); /* IMR2 */
+ __raw_writeb(sh7724_rstandby_state.imr3, 0xa408008c); /* IMR3 */
+ __raw_writeb(sh7724_rstandby_state.imr4, 0xa4080090); /* IMR4 */
+ __raw_writeb(sh7724_rstandby_state.imr5, 0xa4080094); /* IMR5 */
+ __raw_writeb(sh7724_rstandby_state.imr6, 0xa4080098); /* IMR6 */
+ __raw_writeb(sh7724_rstandby_state.imr7, 0xa408009c); /* IMR7 */
+ __raw_writeb(sh7724_rstandby_state.imr8, 0xa40800a0); /* IMR8 */
+ __raw_writeb(sh7724_rstandby_state.imr9, 0xa40800a4); /* IMR9 */
+ __raw_writeb(sh7724_rstandby_state.imr10, 0xa40800a8); /* IMR10 */
+ __raw_writeb(sh7724_rstandby_state.imr11, 0xa40800ac); /* IMR11 */
+ __raw_writeb(sh7724_rstandby_state.imr12, 0xa40800b0); /* IMR12 */
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block sh7724_pre_sleep_notifier = {
+ .notifier_call = sh7724_pre_sleep_notifier_call,
+ .priority = SH_MOBILE_PRE(SH_MOBILE_SLEEP_CPU),
+};
+
+static struct notifier_block sh7724_post_sleep_notifier = {
+ .notifier_call = sh7724_post_sleep_notifier_call,
+ .priority = SH_MOBILE_POST(SH_MOBILE_SLEEP_CPU),
+};
+
+static int __init sh7724_sleep_setup(void)
+{
+ atomic_notifier_chain_register(&sh_mobile_pre_sleep_notifier_list,
+ &sh7724_pre_sleep_notifier);
+
+ atomic_notifier_chain_register(&sh_mobile_post_sleep_notifier_list,
+ &sh7724_post_sleep_notifier);
+ return 0;
+}
+arch_initcall(sh7724_sleep_setup);
+
From 159f8cd99ea0e3613cbb6aeea574af438f33d8d7 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Thu, 29 Oct 2009 10:52:06 +0000
Subject: [PATCH 074/137] sh: Allow boards to register memory pre/post sleep
code
Add code to allow boards registering self-contained
functions for going to/from self-refresh. At this
point the board code is unused. When all supported
boards have been converted then the new sleep code
will make use of these functions.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/suspend.h | 4 ++++
arch/sh/kernel/cpu/shmobile/pm.c | 6 ++++++
2 files changed, 10 insertions(+)
diff --git a/arch/sh/include/asm/suspend.h b/arch/sh/include/asm/suspend.h
index d1cc5221645d..fab58cc2ecd9 100644
--- a/arch/sh/include/asm/suspend.h
+++ b/arch/sh/include/asm/suspend.h
@@ -30,6 +30,10 @@ extern struct atomic_notifier_head sh_mobile_post_sleep_notifier_list;
#define SH_MOBILE_PRE(x) (x)
#define SH_MOBILE_POST(x) (-(x))
+/* board code registration function for self-refresh assembly snippets */
+void sh_mobile_register_self_refresh(unsigned long flags,
+ void *pre_start, void *pre_end,
+ void *post_start, void *post_end);
#endif
/* flags passed to assembly suspend code */
diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c
index 7ebf8cf89242..b424747e4252 100644
--- a/arch/sh/kernel/cpu/shmobile/pm.c
+++ b/arch/sh/kernel/cpu/shmobile/pm.c
@@ -60,6 +60,12 @@ void sh_mobile_call_standby(unsigned long mode)
mode, NULL);
}
+void sh_mobile_register_self_refresh(unsigned long flags,
+ void *pre_start, void *pre_end,
+ void *post_start, void *post_end)
+{
+}
+
static int sh_pm_enter(suspend_state_t state)
{
local_irq_disable();
From 67e522d0f91349127b3e0e536578be484cdb3367 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Thu, 29 Oct 2009 10:52:15 +0000
Subject: [PATCH 075/137] sh: Add kfr2r09 specific memory pre/post sleep code
Add self-refresh handling code for the KFR2R09 board.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-kfr2r09/Makefile | 2 +-
arch/sh/boards/mach-kfr2r09/sdram.S | 52 ++++++++++++++++++++++++++++
arch/sh/boards/mach-kfr2r09/setup.c | 13 +++++++
3 files changed, 66 insertions(+), 1 deletion(-)
create mode 100644 arch/sh/boards/mach-kfr2r09/sdram.S
diff --git a/arch/sh/boards/mach-kfr2r09/Makefile b/arch/sh/boards/mach-kfr2r09/Makefile
index 5d5867826e3b..4e577a3bf658 100644
--- a/arch/sh/boards/mach-kfr2r09/Makefile
+++ b/arch/sh/boards/mach-kfr2r09/Makefile
@@ -1,2 +1,2 @@
-obj-y := setup.o
+obj-y := setup.o sdram.o
obj-$(CONFIG_FB_SH_MOBILE_LCDC) += lcd_wqvga.o
diff --git a/arch/sh/boards/mach-kfr2r09/sdram.S b/arch/sh/boards/mach-kfr2r09/sdram.S
new file mode 100644
index 000000000000..4ce78fcf5674
--- /dev/null
+++ b/arch/sh/boards/mach-kfr2r09/sdram.S
@@ -0,0 +1,52 @@
+/*
+ * KFR2R09 sdram self/auto-refresh setup code
+ *
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/sys.h>
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/suspend.h>
+#include <asm/romimage-macros.h>
+
+/* code to enter and leave self-refresh. must be self-contained.
+ * this code will be copied to on-chip memory and executed from there.
+ */
+ .balign 4
+ENTRY(kfr2r09_sdram_enter_start)
+
+ /* DBSC: put memory in self-refresh mode */
+
+ ED 0xFD000010, 0x00000000 /* DBEN */
+ ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+ ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+ ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+ ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
+
+ rts
+ nop
+
+ENTRY(kfr2r09_sdram_enter_end)
+
+ .balign 4
+ENTRY(kfr2r09_sdram_leave_start)
+
+ /* DBSC: put memory in auto-refresh mode */
+
+ ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+ WAIT 1
+ ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+ ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+ ED 0xFD000010, 0x00000001 /* DBEN */
+ ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
+
+ rts
+ nop
+
+ENTRY(kfr2r09_sdram_leave_end)
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index 43d75ee93358..5dae632092f2 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -21,6 +21,7 @@
#include <media/soc_camera.h>
#include <media/sh_mobile_ceu.h>
#include <video/sh_mobile_lcdc.h>
+#include <asm/suspend.h>
#include <asm/clock.h>
#include <asm/machvec.h>
#include <asm/io.h>
@@ -444,8 +445,20 @@ static int kfr2r09_usb0_gadget_setup(void)
return 0;
}
+extern char kfr2r09_sdram_enter_start;
+extern char kfr2r09_sdram_enter_end;
+extern char kfr2r09_sdram_leave_start;
+extern char kfr2r09_sdram_leave_end;
+
static int __init kfr2r09_devices_setup(void)
{
+ /* register board specific self-refresh code */
+ sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
+ &kfr2r09_sdram_enter_start,
+ &kfr2r09_sdram_enter_end,
+ &kfr2r09_sdram_leave_start,
+ &kfr2r09_sdram_leave_end);
+
/* enable SCIF1 serial port for YC401 console support */
gpio_request(GPIO_FN_SCIF1_RXD, NULL);
gpio_request(GPIO_FN_SCIF1_TXD, NULL);
From 3b9f2952a3eda738f5f2d7610b76e284cbac581f Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Thu, 29 Oct 2009 10:52:23 +0000
Subject: [PATCH 076/137] sh: Add ms7724se specific memory pre/post sleep code
Add self-refresh handling code for the MS7724SE board.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-se/7724/Makefile | 2 +-
arch/sh/boards/mach-se/7724/sdram.S | 52 ++++++++++++++++++++++++++++
arch/sh/boards/mach-se/7724/setup.c | 12 +++++++
3 files changed, 65 insertions(+), 1 deletion(-)
create mode 100644 arch/sh/boards/mach-se/7724/sdram.S
diff --git a/arch/sh/boards/mach-se/7724/Makefile b/arch/sh/boards/mach-se/7724/Makefile
index 349cbd6ce82d..a08b36830f0e 100644
--- a/arch/sh/boards/mach-se/7724/Makefile
+++ b/arch/sh/boards/mach-se/7724/Makefile
@@ -7,4 +7,4 @@
#
#
-obj-y := setup.o irq.o
\ No newline at end of file
+obj-y := setup.o irq.o sdram.o
diff --git a/arch/sh/boards/mach-se/7724/sdram.S b/arch/sh/boards/mach-se/7724/sdram.S
new file mode 100644
index 000000000000..9040167d5022
--- /dev/null
+++ b/arch/sh/boards/mach-se/7724/sdram.S
@@ -0,0 +1,52 @@
+/*
+ * MS7724SE sdram self/auto-refresh setup code
+ *
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/sys.h>
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/suspend.h>
+#include <asm/romimage-macros.h>
+
+/* code to enter and leave self-refresh. must be self-contained.
+ * this code will be copied to on-chip memory and executed from there.
+ */
+ .balign 4
+ENTRY(ms7724se_sdram_enter_start)
+
+ /* DBSC: put memory in self-refresh mode */
+
+ ED 0xFD000010, 0x00000000 /* DBEN */
+ ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+ ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+ ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+ ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
+
+ rts
+ nop
+
+ENTRY(ms7724se_sdram_enter_end)
+
+ .balign 4
+ENTRY(ms7724se_sdram_leave_start)
+
+ /* DBSC: put memory in auto-refresh mode */
+
+ ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+ WAIT 1
+ ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+ ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+ ED 0xFD000010, 0x00000001 /* DBEN */
+ ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
+
+ rts
+ nop
+
+ENTRY(ms7724se_sdram_leave_end)
diff --git a/arch/sh/boards/mach-se/7724/setup.c b/arch/sh/boards/mach-se/7724/setup.c
index ffb97f22783c..ae23fa970e6d 100644
--- a/arch/sh/boards/mach-se/7724/setup.c
+++ b/arch/sh/boards/mach-se/7724/setup.c
@@ -28,6 +28,7 @@
#include <asm/sh_eth.h>
#include <asm/clock.h>
#include <asm/sh_keysc.h>
+#include <asm/suspend.h>
#include <cpu/sh7724.h>
#include <mach-se/mach/se7724.h>
@@ -566,11 +567,22 @@ static void __init sh_eth_init(void)
#define SW41_G 0x4000
#define SW41_H 0x8000
+extern char ms7724se_sdram_enter_start;
+extern char ms7724se_sdram_enter_end;
+extern char ms7724se_sdram_leave_start;
+extern char ms7724se_sdram_leave_end;
+
static int __init devices_setup(void)
{
u16 sw = ctrl_inw(SW4140); /* select camera, monitor */
struct clk *fsia_clk;
+ /* register board specific self-refresh code */
+ sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
+ &ms7724se_sdram_enter_start,
+ &ms7724se_sdram_enter_end,
+ &ms7724se_sdram_leave_start,
+ &ms7724se_sdram_leave_end);
/* Reset Release */
ctrl_outw(ctrl_inw(FPGA_OUT) &
~((1 << 1) | /* LAN */
From 13fa551b5eb1752c6974a81ef19f369220972cf2 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Thu, 29 Oct 2009 10:52:31 +0000
Subject: [PATCH 077/137] sh: Add migor specific memory pre/post sleep code
Add self-refresh handling code for the Migo-R board.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-migor/Makefile | 2 +-
arch/sh/boards/mach-migor/sdram.S | 69 ++++++++++++++++++++++++++++++
arch/sh/boards/mach-migor/setup.c | 13 +++++-
3 files changed, 82 insertions(+), 2 deletions(-)
create mode 100644 arch/sh/boards/mach-migor/sdram.S
diff --git a/arch/sh/boards/mach-migor/Makefile b/arch/sh/boards/mach-migor/Makefile
index 5f231dd25c0e..4601a89e5ac7 100644
--- a/arch/sh/boards/mach-migor/Makefile
+++ b/arch/sh/boards/mach-migor/Makefile
@@ -1,2 +1,2 @@
-obj-y := setup.o
+obj-y := setup.o sdram.o
obj-$(CONFIG_SH_MIGOR_QVGA) += lcd_qvga.o
diff --git a/arch/sh/boards/mach-migor/sdram.S b/arch/sh/boards/mach-migor/sdram.S
new file mode 100644
index 000000000000..614aa3a1398c
--- /dev/null
+++ b/arch/sh/boards/mach-migor/sdram.S
@@ -0,0 +1,69 @@
+/*
+ * Migo-R sdram self/auto-refresh setup code
+ *
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/sys.h>
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/suspend.h>
+#include <asm/romimage-macros.h>
+
+/* code to enter and leave self-refresh. must be self-contained.
+ * this code will be copied to on-chip memory and executed from there.
+ */
+ .balign 4
+ENTRY(migor_sdram_enter_start)
+
+ /* SBSC: disable power down and put in self-refresh mode */
+ mov.l 1f, r4
+ mov.l 2f, r1
+ mov.l @r4, r2
+ or r1, r2
+ mov.l 3f, r3
+ and r3, r2
+ mov.l r2, @r4
+
+ rts
+ nop
+
+ .balign 4
+1: .long 0xfe400008 /* SDCR0 */
+2: .long 0x00000400
+3: .long 0xffff7fff
+ENTRY(migor_sdram_enter_end)
+
+ .balign 4
+ENTRY(migor_sdram_leave_start)
+
+ /* SBSC: set auto-refresh mode */
+ mov.l 1f, r4
+ mov.l @r4, r0
+ mov.l 4f, r1
+ and r1, r0
+ mov.l r0, @r4
+ mov.l 6f, r4
+ mov.l 8f, r0
+ mov.l @r4, r1
+ mov #-1, r4
+ add r4, r1
+ or r1, r0
+ mov.l 7f, r1
+ mov.l r0, @r1
+
+ rts
+ nop
+
+ .balign 4
+1: .long 0xfe400008 /* SDCR0 */
+4: .long 0xfffffbff
+6: .long 0xfe40001c /* RTCOR */
+7: .long 0xfe400018 /* RTCNT */
+8: .long 0xa55a0000
+ENTRY(migor_sdram_leave_end)
diff --git a/arch/sh/boards/mach-migor/setup.c b/arch/sh/boards/mach-migor/setup.c
index 8e911360c91e..369525701d60 100644
--- a/arch/sh/boards/mach-migor/setup.c
+++ b/arch/sh/boards/mach-migor/setup.c
@@ -26,6 +26,7 @@
#include <asm/machvec.h>
#include <asm/io.h>
#include <asm/sh_keysc.h>
+#include <asm/suspend.h>
#include <mach/migor.h>
#include <cpu/sh7722.h>
@@ -478,9 +479,19 @@ static struct platform_device *migor_devices[] __initdata = {
&migor_camera[1],
};
+extern char migor_sdram_enter_start;
+extern char migor_sdram_enter_end;
+extern char migor_sdram_leave_start;
+extern char migor_sdram_leave_end;
+
static int __init migor_devices_setup(void)
{
-
+ /* register board specific self-refresh code */
+ sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
+ &migor_sdram_enter_start,
+ &migor_sdram_enter_end,
+ &migor_sdram_leave_start,
+ &migor_sdram_leave_end);
#ifdef CONFIG_PM
/* Let D11 LED show STATUS0 */
gpio_request(GPIO_FN_STATUS0, NULL);
From 53528928d1260747c294b63218d9886c74df4c31 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 04:23:42 +0000
Subject: [PATCH 078/137] sh: Move ap325rxa board code into separate directory
Move the AP325RXA board code from a single board file
to a separate directory. This to make it easy to add
support for sdram sleep mode code.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/Makefile | 1 +
arch/sh/boards/Makefile | 1 -
arch/sh/boards/mach-ap325rxa/Makefile | 2 ++
arch/sh/boards/{board-ap325rxa.c => mach-ap325rxa/setup.c} | 0
4 files changed, 3 insertions(+), 1 deletion(-)
create mode 100644 arch/sh/boards/mach-ap325rxa/Makefile
rename arch/sh/boards/{board-ap325rxa.c => mach-ap325rxa/setup.c} (100%)
diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index 66e40aabc600..3ce000eb5570 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -136,6 +136,7 @@ machdir-$(CONFIG_SH_7751_SYSTEMH) += mach-systemh
machdir-$(CONFIG_SH_EDOSK7705) += mach-edosk7705
machdir-$(CONFIG_SH_HIGHLANDER) += mach-highlander
machdir-$(CONFIG_SH_MIGOR) += mach-migor
+machdir-$(CONFIG_SH_AP325RXA) += mach-ap325rxa
machdir-$(CONFIG_SH_KFR2R09) += mach-kfr2r09
machdir-$(CONFIG_SH_ECOVEC) += mach-ecovec24
machdir-$(CONFIG_SH_SDK7780) += mach-sdk7780
diff --git a/arch/sh/boards/Makefile b/arch/sh/boards/Makefile
index 7baa21090231..ce0f26381784 100644
--- a/arch/sh/boards/Makefile
+++ b/arch/sh/boards/Makefile
@@ -1,7 +1,6 @@
#
# Specific board support, not covered by a mach group.
#
-obj-$(CONFIG_SH_AP325RXA) += board-ap325rxa.o
obj-$(CONFIG_SH_MAGIC_PANEL_R2) += board-magicpanelr2.o
obj-$(CONFIG_SH_SH7785LCR) += board-sh7785lcr.o
obj-$(CONFIG_SH_URQUELL) += board-urquell.o
diff --git a/arch/sh/boards/mach-ap325rxa/Makefile b/arch/sh/boards/mach-ap325rxa/Makefile
new file mode 100644
index 000000000000..0ad249dbd351
--- /dev/null
+++ b/arch/sh/boards/mach-ap325rxa/Makefile
@@ -0,0 +1,2 @@
+obj-y := setup.o
+
diff --git a/arch/sh/boards/board-ap325rxa.c b/arch/sh/boards/mach-ap325rxa/setup.c
similarity index 100%
rename from arch/sh/boards/board-ap325rxa.c
rename to arch/sh/boards/mach-ap325rxa/setup.c
From 86c7d03a0fe4241e64eb19b86544647c8ee4bac9 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 04:23:51 +0000
Subject: [PATCH 079/137] sh: Add ap325rxa specific memory pre/post sleep code
Add self-refresh handling code for the AP325RXA board.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-ap325rxa/Makefile | 2 +-
arch/sh/boards/mach-ap325rxa/sdram.S | 69 +++++++++++++++++++++++++++
arch/sh/boards/mach-ap325rxa/setup.c | 13 +++++
3 files changed, 83 insertions(+), 1 deletion(-)
create mode 100644 arch/sh/boards/mach-ap325rxa/sdram.S
diff --git a/arch/sh/boards/mach-ap325rxa/Makefile b/arch/sh/boards/mach-ap325rxa/Makefile
index 0ad249dbd351..4cf1774d2613 100644
--- a/arch/sh/boards/mach-ap325rxa/Makefile
+++ b/arch/sh/boards/mach-ap325rxa/Makefile
@@ -1,2 +1,2 @@
-obj-y := setup.o
+obj-y := setup.o sdram.o
diff --git a/arch/sh/boards/mach-ap325rxa/sdram.S b/arch/sh/boards/mach-ap325rxa/sdram.S
new file mode 100644
index 000000000000..db24fbed4fca
--- /dev/null
+++ b/arch/sh/boards/mach-ap325rxa/sdram.S
@@ -0,0 +1,69 @@
+/*
+ * AP325RXA sdram self/auto-refresh setup code
+ *
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/sys.h>
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/suspend.h>
+#include <asm/romimage-macros.h>
+
+/* code to enter and leave self-refresh. must be self-contained.
+ * this code will be copied to on-chip memory and executed from there.
+ */
+ .balign 4
+ENTRY(ap325rxa_sdram_enter_start)
+
+ /* SBSC: disable power down and put in self-refresh mode */
+ mov.l 1f, r4
+ mov.l 2f, r1
+ mov.l @r4, r2
+ or r1, r2
+ mov.l 3f, r3
+ and r3, r2
+ mov.l r2, @r4
+
+ rts
+ nop
+
+ .balign 4
+1: .long 0xfe400008 /* SDCR0 */
+2: .long 0x00000400
+3: .long 0xffff7fff
+ENTRY(ap325rxa_sdram_enter_end)
+
+ .balign 4
+ENTRY(ap325rxa_sdram_leave_start)
+
+ /* SBSC: set auto-refresh mode */
+ mov.l 1f, r4
+ mov.l @r4, r0
+ mov.l 4f, r1
+ and r1, r0
+ mov.l r0, @r4
+ mov.l 6f, r4
+ mov.l 8f, r0
+ mov.l @r4, r1
+ mov #-1, r4
+ add r4, r1
+ or r1, r0
+ mov.l 7f, r1
+ mov.l r0, @r1
+
+ rts
+ nop
+
+ .balign 4
+1: .long 0xfe400008 /* SDCR0 */
+4: .long 0xfffffbff
+6: .long 0xfe40001c /* RTCOR */
+7: .long 0xfe400018 /* RTCNT */
+8: .long 0xa55a0000
+ENTRY(ap325rxa_sdram_leave_end)
diff --git a/arch/sh/boards/mach-ap325rxa/setup.c b/arch/sh/boards/mach-ap325rxa/setup.c
index b95deee35e0f..be8da973f00f 100644
--- a/arch/sh/boards/mach-ap325rxa/setup.c
+++ b/arch/sh/boards/mach-ap325rxa/setup.c
@@ -27,6 +27,7 @@
#include <video/sh_mobile_lcdc.h>
#include <asm/io.h>
#include <asm/clock.h>
+#include <asm/suspend.h>
#include <cpu/sh7723.h>
static struct smsc911x_platform_config smsc911x_config = {
@@ -481,8 +482,20 @@ static struct platform_device *ap325rxa_devices[] __initdata = {
&ap325rxa_camera[1],
};
+extern char ap325rxa_sdram_enter_start;
+extern char ap325rxa_sdram_enter_end;
+extern char ap325rxa_sdram_leave_start;
+extern char ap325rxa_sdram_leave_end;
+
static int __init ap325rxa_devices_setup(void)
{
+ /* register board specific self-refresh code */
+ sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
+ &ap325rxa_sdram_enter_start,
+ &ap325rxa_sdram_enter_end,
+ &ap325rxa_sdram_leave_start,
+ &ap325rxa_sdram_leave_end);
+
/* LD3 and LD4 LEDs */
gpio_request(GPIO_PTX5, NULL); /* RUN */
gpio_direction_output(GPIO_PTX5, 1);
From eb0cd9e88c6a6561055b32a17d44d8918aecc3c7 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 04:23:59 +0000
Subject: [PATCH 080/137] sh: Add Ecovec24 specific memory pre/post sleep code
Add self-refresh handling code for the Ecovec24 board.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-ecovec24/Makefile | 2 +-
arch/sh/boards/mach-ecovec24/sdram.S | 52 +++++++++++++++++++++++++++
arch/sh/boards/mach-ecovec24/setup.c | 14 ++++++++
3 files changed, 67 insertions(+), 1 deletion(-)
create mode 100644 arch/sh/boards/mach-ecovec24/sdram.S
diff --git a/arch/sh/boards/mach-ecovec24/Makefile b/arch/sh/boards/mach-ecovec24/Makefile
index 51f852151655..e69bc82208fc 100644
--- a/arch/sh/boards/mach-ecovec24/Makefile
+++ b/arch/sh/boards/mach-ecovec24/Makefile
@@ -6,4 +6,4 @@
# for more details.
#
-obj-y := setup.o
\ No newline at end of file
+obj-y := setup.o sdram.o
\ No newline at end of file
diff --git a/arch/sh/boards/mach-ecovec24/sdram.S b/arch/sh/boards/mach-ecovec24/sdram.S
new file mode 100644
index 000000000000..833440044407
--- /dev/null
+++ b/arch/sh/boards/mach-ecovec24/sdram.S
@@ -0,0 +1,52 @@
+/*
+ * Ecovec24 sdram self/auto-refresh setup code
+ *
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/sys.h>
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/suspend.h>
+#include <asm/romimage-macros.h>
+
+/* code to enter and leave self-refresh. must be self-contained.
+ * this code will be copied to on-chip memory and executed from there.
+ */
+ .balign 4
+ENTRY(ecovec24_sdram_enter_start)
+
+ /* DBSC: put memory in self-refresh mode */
+
+ ED 0xFD000010, 0x00000000 /* DBEN */
+ ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+ ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+ ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+ ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
+
+ rts
+ nop
+
+ENTRY(ecovec24_sdram_enter_end)
+
+ .balign 4
+ENTRY(ecovec24_sdram_leave_start)
+
+ /* DBSC: put memory in auto-refresh mode */
+
+ ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+ WAIT 1
+ ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+ ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+ ED 0xFD000010, 0x00000001 /* DBEN */
+ ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
+
+ rts
+ nop
+
+ENTRY(ecovec24_sdram_leave_end)
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index c3d05e5be2e9..2274985753a4 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -26,6 +26,7 @@
#include <asm/sh_eth.h>
#include <asm/sh_keysc.h>
#include <asm/clock.h>
+#include <asm/suspend.h>
#include <cpu/sh7724.h>
/*
@@ -526,8 +527,21 @@ static void __init sh_eth_init(struct sh_eth_plat_data *pd)
#define PORT_HIZA 0xA4050158
#define IODRIVEA 0xA405018A
+
+extern char ecovec24_sdram_enter_start;
+extern char ecovec24_sdram_enter_end;
+extern char ecovec24_sdram_leave_start;
+extern char ecovec24_sdram_leave_end;
+
static int __init arch_setup(void)
{
+ /* register board specific self-refresh code */
+ sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
+ &ecovec24_sdram_enter_start,
+ &ecovec24_sdram_enter_end,
+ &ecovec24_sdram_leave_start,
+ &ecovec24_sdram_leave_end);
+
/* enable STATUS0, STATUS2 and PDSTATUS */
gpio_request(GPIO_FN_STATUS0, NULL);
gpio_request(GPIO_FN_STATUS2, NULL);
From 323ef8dba67fb7b9c709457bd0374d88cfb8f25f Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 04:24:07 +0000
Subject: [PATCH 081/137] sh: Rework SuperH Mobile sleep mode code
Rework the SuperH Mobile sleep code from including
board specific code to allowing each board to provide
pre/post code snippets. These snippets should contain
sdram management code to enter and leave self-refresh.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/suspend.h | 27 ++++
arch/sh/kernel/asm-offsets.c | 10 ++
arch/sh/kernel/cpu/shmobile/pm.c | 54 +++++--
arch/sh/kernel/cpu/shmobile/sleep.S | 242 +++++++++++-----------------
4 files changed, 170 insertions(+), 163 deletions(-)
diff --git a/arch/sh/include/asm/suspend.h b/arch/sh/include/asm/suspend.h
index fab58cc2ecd9..8e2c55dc5fe6 100644
--- a/arch/sh/include/asm/suspend.h
+++ b/arch/sh/include/asm/suspend.h
@@ -34,6 +34,33 @@ extern struct atomic_notifier_head sh_mobile_post_sleep_notifier_list;
void sh_mobile_register_self_refresh(unsigned long flags,
void *pre_start, void *pre_end,
void *post_start, void *post_end);
+
+/* register structure for address/data information */
+struct sh_sleep_regs {
+ unsigned long stbcr;
+};
+
+/* data area for low-level sleep code */
+struct sh_sleep_data {
+ /* current sleep mode (SUSP_SH_...) */
+ unsigned long mode;
+
+ /* addresses of board specific self-refresh snippets */
+ unsigned long sf_pre;
+ unsigned long sf_post;
+
+ /* register state saved and restored by the assembly code */
+ unsigned long vbr;
+ unsigned long spc;
+ unsigned long sr;
+
+ /* structure for keeping register addresses */
+ struct sh_sleep_regs addr;
+
+ /* structure for saving/restoring register state */
+ struct sh_sleep_regs data;
+};
+
#endif
/* flags passed to assembly suspend code */
diff --git a/arch/sh/kernel/asm-offsets.c b/arch/sh/kernel/asm-offsets.c
index d218e808294e..9bdeff962e1c 100644
--- a/arch/sh/kernel/asm-offsets.c
+++ b/arch/sh/kernel/asm-offsets.c
@@ -34,5 +34,15 @@ int main(void)
DEFINE(PBE_NEXT, offsetof(struct pbe, next));
DEFINE(SWSUSP_ARCH_REGS_SIZE, sizeof(struct swsusp_arch_regs));
#endif
+
+ DEFINE(SH_SLEEP_MODE, offsetof(struct sh_sleep_data, mode));
+ DEFINE(SH_SLEEP_SF_PRE, offsetof(struct sh_sleep_data, sf_pre));
+ DEFINE(SH_SLEEP_SF_POST, offsetof(struct sh_sleep_data, sf_post));
+ DEFINE(SH_SLEEP_VBR, offsetof(struct sh_sleep_data, vbr));
+ DEFINE(SH_SLEEP_SPC, offsetof(struct sh_sleep_data, spc));
+ DEFINE(SH_SLEEP_SR, offsetof(struct sh_sleep_data, sr));
+ DEFINE(SH_SLEEP_BASE_ADDR, offsetof(struct sh_sleep_data, addr));
+ DEFINE(SH_SLEEP_BASE_DATA, offsetof(struct sh_sleep_data, data));
+ DEFINE(SH_SLEEP_REG_STBCR, offsetof(struct sh_sleep_regs, stbcr));
return 0;
}
diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c
index b424747e4252..cb3d28f2968c 100644
--- a/arch/sh/kernel/cpu/shmobile/pm.c
+++ b/arch/sh/kernel/cpu/shmobile/pm.c
@@ -42,13 +42,14 @@ ATOMIC_NOTIFIER_HEAD(sh_mobile_post_sleep_notifier_list);
#define ILRAM_BASE 0xe5200000
-extern const unsigned char sh_mobile_standby[];
-extern const unsigned int sh_mobile_standby_size;
-
void sh_mobile_call_standby(unsigned long mode)
{
void *onchip_mem = (void *)ILRAM_BASE;
- void (*standby_onchip_mem)(unsigned long, unsigned long) = onchip_mem;
+ struct sh_sleep_data *sdp = onchip_mem;
+ void (*standby_onchip_mem)(unsigned long, unsigned long);
+
+ /* code located directly after data structure */
+ standby_onchip_mem = (void *)(sdp + 1);
atomic_notifier_call_chain(&sh_mobile_pre_sleep_notifier_list,
mode, NULL);
@@ -60,10 +61,48 @@ void sh_mobile_call_standby(unsigned long mode)
mode, NULL);
}
+extern char sh_mobile_sleep_enter_start;
+extern char sh_mobile_sleep_enter_end;
+
+extern char sh_mobile_sleep_resume_start;
+extern char sh_mobile_sleep_resume_end;
+
void sh_mobile_register_self_refresh(unsigned long flags,
void *pre_start, void *pre_end,
void *post_start, void *post_end)
{
+ void *onchip_mem = (void *)ILRAM_BASE;
+ void *vp;
+ struct sh_sleep_data *sdp;
+ int n;
+
+ /* part 0: data area */
+ sdp = onchip_mem;
+ sdp->addr.stbcr = 0xa4150020; /* STBCR */
+ vp = sdp + 1;
+
+ /* part 1: common code to enter sleep mode */
+ n = &sh_mobile_sleep_enter_end - &sh_mobile_sleep_enter_start;
+ memcpy(vp, &sh_mobile_sleep_enter_start, n);
+ vp += roundup(n, 4);
+
+ /* part 2: board specific code to enter self-refresh mode */
+ n = pre_end - pre_start;
+ memcpy(vp, pre_start, n);
+ sdp->sf_pre = (unsigned long)vp;
+ vp += roundup(n, 4);
+
+ /* part 3: board specific code to resume from self-refresh mode */
+ n = post_end - post_start;
+ memcpy(vp, post_start, n);
+ sdp->sf_post = (unsigned long)vp;
+ vp += roundup(n, 4);
+
+ /* part 4: common code to resume from sleep mode */
+ WARN_ON(vp > (onchip_mem + 0x600));
+ vp = onchip_mem + 0x600; /* located at interrupt vector */
+ n = &sh_mobile_sleep_resume_end - &sh_mobile_sleep_resume_start;
+ memcpy(vp, &sh_mobile_sleep_resume_start, n);
}
static int sh_pm_enter(suspend_state_t state)
@@ -83,13 +122,6 @@ static struct platform_suspend_ops sh_pm_ops = {
static int __init sh_pm_init(void)
{
- void *onchip_mem = (void *)ILRAM_BASE;
-
- /* Copy the assembly snippet to the otherwise ununsed ILRAM */
- memcpy(onchip_mem, sh_mobile_standby, sh_mobile_standby_size);
- wmb();
- ctrl_barrier();
-
suspend_set_ops(&sh_pm_ops);
sh_mobile_setup_cpuidle();
return 0;
diff --git a/arch/sh/kernel/cpu/shmobile/sleep.S b/arch/sh/kernel/cpu/shmobile/sleep.S
index a439e6c7824f..d3221d9b88be 100644
--- a/arch/sh/kernel/cpu/shmobile/sleep.S
+++ b/arch/sh/kernel/cpu/shmobile/sleep.S
@@ -20,79 +20,49 @@
* Kernel mode register usage, see entry.S:
* k0 scratch
* k1 scratch
- * k4 scratch
*/
#define k0 r0
#define k1 r1
-#define k4 r4
-/* manage self-refresh and enter standby mode.
+/* manage self-refresh and enter standby mode. must be self-contained.
* this code will be copied to on-chip memory and executed from there.
*/
+ .balign 4
+ENTRY(sh_mobile_sleep_enter_start)
- .balign 4096,0,4096
-ENTRY(sh_mobile_standby)
+ /* save mode flags */
+ mov.l r4, @(SH_SLEEP_MODE, r5)
/* save original vbr */
- stc vbr, r1
- mova saved_vbr, r0
- mov.l r1, @r0
+ stc vbr, r0
+ mov.l r0, @(SH_SLEEP_VBR, r5)
/* point vbr to our on-chip memory page */
ldc r5, vbr
/* save return address */
- mova saved_spc, r0
- sts pr, r5
- mov.l r5, @r0
+ sts pr, r0
+ mov.l r0, @(SH_SLEEP_SPC, r5)
/* save sr */
- mova saved_sr, r0
- stc sr, r5
- mov.l r5, @r0
+ stc sr, r0
+ mov.l r0, @(SH_SLEEP_SR, r5)
- /* save mode flags */
- mova saved_mode, r0
- mov.l r4, @r0
-
- /* put mode flags in r0 */
- mov r4, r0
+ /* save stbcr */
+ bsr save_register
+ mov #SH_SLEEP_REG_STBCR, r0
+ /* call self-refresh entering code if needed */
+ mov.l @(SH_SLEEP_MODE, r5), r0
tst #SUSP_SH_SF, r0
bt skip_set_sf
-#ifdef CONFIG_CPU_SUBTYPE_SH7724
- /* DBSC: put memory in self-refresh mode */
- mov.l dben_reg, r4
- mov.l dben_data0, r1
- mov.l r1, @r4
- mov.l dbrfpdn0_reg, r4
- mov.l dbrfpdn0_data0, r1
- mov.l r1, @r4
-
- mov.l dbcmdcnt_reg, r4
- mov.l dbcmdcnt_data0, r1
- mov.l r1, @r4
-
- mov.l dbcmdcnt_reg, r4
- mov.l dbcmdcnt_data1, r1
- mov.l r1, @r4
-
- mov.l dbrfpdn0_reg, r4
- mov.l dbrfpdn0_data1, r1
- mov.l r1, @r4
-#else
- /* SBSC: disable power down and put in self-refresh mode */
- mov.l 1f, r4
- mov.l 2f, r1
- mov.l @r4, r2
- or r1, r2
- mov.l 3f, r3
- and r3, r2
- mov.l r2, @r4
-#endif
+ mov.l @(SH_SLEEP_SF_PRE, r5), r0
+ jsr @r0
+ nop
skip_set_sf:
+ mov.l @(SH_SLEEP_MODE, r5), r0
tst #SUSP_SH_STANDBY, r0
bt test_rstandby
@@ -123,124 +93,92 @@ force_sleep:
do_sleep:
/* setup and enter selected standby mode */
- mov.l 5f, r4
- mov.l r1, @r4
+ bsr get_register
+ mov #SH_SLEEP_REG_STBCR, r0
+ mov.l r1, @r0
again:
sleep
bra again
nop
-restore_jump_vbr:
+save_register:
+ add #SH_SLEEP_BASE_ADDR, r0
+ mov.l @(r0, r5), r1
+ add #-SH_SLEEP_BASE_ADDR, r0
+ mov.l @r1, r1
+ add #SH_SLEEP_BASE_DATA, r0
+ mov.l r1, @(r0, r5)
+ add #-SH_SLEEP_BASE_DATA, r0
+ rts
+ nop
+
+get_register:
+ add #SH_SLEEP_BASE_ADDR, r0
+ mov.l @(r0, r5), r0
+ rts
+ nop
+ENTRY(sh_mobile_sleep_enter_end)
+
+ .balign 4
+ENTRY(sh_mobile_sleep_resume_start)
+
+ /* figure out start address */
+ bsr 0f
+ nop
+0:
+ sts pr, k1
+ mov.l 1f, k0
+ and k0, k1
+
+ /* store pointer to data area in VBR */
+ ldc k1, vbr
+
+ /* setup sr with saved sr */
+ mov.l @(SH_SLEEP_SR, k1), k0
+ ldc k0, sr
+
+ /* now: user register set! */
+ stc vbr, r5
+
/* setup spc with return address to c code */
- mov.l saved_spc, k0
- ldc k0, spc
+ mov.l @(SH_SLEEP_SPC, r5), r0
+ ldc r0, spc
/* restore vbr */
- mov.l saved_vbr, k0
- ldc k0, vbr
+ mov.l @(SH_SLEEP_VBR, r5), r0
+ ldc r0, vbr
/* setup ssr with saved sr */
- mov.l saved_sr, k0
- ldc k0, ssr
+ mov.l @(SH_SLEEP_SR, r5), r0
+ ldc r0, ssr
- /* get mode flags */
- mov.l saved_mode, k0
+ /* restore sleep mode register */
+ bsr restore_register
+ mov #SH_SLEEP_REG_STBCR, r0
-done_sleep:
- /* reset standby mode to sleep mode */
- mov.l 5f, k4
- mov #0x00, k1
- mov.l k1, @k4
-
- tst #SUSP_SH_SF, k0
+ /* call self-refresh resume code if needed */
+ mov.l @(SH_SLEEP_MODE, r5), r0
+ tst #SUSP_SH_SF, r0
bt skip_restore_sf
-#ifdef CONFIG_CPU_SUBTYPE_SH7724
- /* DBSC: put memory in auto-refresh mode */
- mov.l dbrfpdn0_reg, k4
- mov.l dbrfpdn0_data0, k1
- mov.l k1, @k4
+ mov.l @(SH_SLEEP_SF_POST, r5), r0
+ jsr @r0
+ nop
- nop /* sleep 140 ns */
- nop
- nop
- nop
-
- mov.l dbcmdcnt_reg, k4
- mov.l dbcmdcnt_data0, k1
- mov.l k1, @k4
-
- mov.l dbcmdcnt_reg, k4
- mov.l dbcmdcnt_data1, k1
- mov.l k1, @k4
-
- mov.l dben_reg, k4
- mov.l dben_data1, k1
- mov.l k1, @k4
-
- mov.l dbrfpdn0_reg, k4
- mov.l dbrfpdn0_data2, k1
- mov.l k1, @k4
-#else
- /* SBSC: set auto-refresh mode */
- mov.l 1f, k4
- mov.l @k4, k0
- mov.l 4f, k1
- and k1, k0
- mov.l k0, @k4
- mov.l 6f, k4
- mov.l 8f, k0
- mov.l @k4, k1
- mov #-1, k4
- add k4, k1
- or k1, k0
- mov.l 7f, k1
- mov.l k0, @k1
-#endif
skip_restore_sf:
- /* jump to vbr vector */
- mov.l saved_vbr, k0
- mov.l offset_vbr, k4
- add k4, k0
- jmp @k0
+ rte
+ nop
+
+restore_register:
+ add #SH_SLEEP_BASE_DATA, r0
+ mov.l @(r0, r5), r1
+ add #-SH_SLEEP_BASE_DATA, r0
+ add #SH_SLEEP_BASE_ADDR, r0
+ mov.l @(r0, r5), r0
+ mov.l r1, @r0
+ rts
nop
.balign 4
-saved_mode: .long 0
-saved_spc: .long 0
-saved_sr: .long 0
-saved_vbr: .long 0
-offset_vbr: .long 0x600
-#ifdef CONFIG_CPU_SUBTYPE_SH7724
-dben_reg: .long 0xfd000010 /* DBEN */
-dben_data0: .long 0
-dben_data1: .long 1
-dbrfpdn0_reg: .long 0xfd000040 /* DBRFPDN0 */
-dbrfpdn0_data0: .long 0
-dbrfpdn0_data1: .long 1
-dbrfpdn0_data2: .long 0x00010000
-dbcmdcnt_reg: .long 0xfd000014 /* DBCMDCNT */
-dbcmdcnt_data0: .long 2
-dbcmdcnt_data1: .long 4
-#else
-1: .long 0xfe400008 /* SDCR0 */
-2: .long 0x00000400
-3: .long 0xffff7fff
-4: .long 0xfffffbff
-#endif
-5: .long 0xa4150020 /* STBCR */
-6: .long 0xfe40001c /* RTCOR */
-7: .long 0xfe400018 /* RTCNT */
-8: .long 0xa55a0000
-
-
-/* interrupt vector @ 0x600 */
- .balign 0x400,0,0x400
- .long 0xdeadbeef
- .balign 0x200,0,0x200
- bra restore_jump_vbr
- nop
-sh_mobile_standby_end:
-
-ENTRY(sh_mobile_standby_size)
- .long sh_mobile_standby_end - sh_mobile_standby
+1: .long ~0x7ff
+ENTRY(sh_mobile_sleep_resume_end)
From 02bf89347c7d6a6aeae64f02536dac038c402fce Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 04:24:15 +0000
Subject: [PATCH 082/137] sh: Keep track of allowed sleep modes
Add code to keep track of supported sleep modes. This to
only export cpuidle modes that are backed by board support
code. Also, do not allow suspend-to-ram if sdram board code
is missing.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/suspend.h | 3 ++
arch/sh/kernel/cpu/shmobile/cpuidle.c | 42 +++++++++++++++------------
arch/sh/kernel/cpu/shmobile/pm.c | 7 +++++
3 files changed, 34 insertions(+), 18 deletions(-)
diff --git a/arch/sh/include/asm/suspend.h b/arch/sh/include/asm/suspend.h
index 8e2c55dc5fe6..8eddf236fb85 100644
--- a/arch/sh/include/asm/suspend.h
+++ b/arch/sh/include/asm/suspend.h
@@ -61,6 +61,9 @@ struct sh_sleep_data {
struct sh_sleep_regs data;
};
+/* a bitmap of supported sleep modes (SUSP_SH..) */
+extern unsigned long sh_mobile_sleep_supported;
+
#endif
/* flags passed to assembly suspend code */
diff --git a/arch/sh/kernel/cpu/shmobile/cpuidle.c b/arch/sh/kernel/cpu/shmobile/cpuidle.c
index 1c504bd972c3..83972aa319c2 100644
--- a/arch/sh/kernel/cpu/shmobile/cpuidle.c
+++ b/arch/sh/kernel/cpu/shmobile/cpuidle.c
@@ -87,25 +87,31 @@ void sh_mobile_setup_cpuidle(void)
dev->safe_state = state;
- state = &dev->states[i++];
- snprintf(state->name, CPUIDLE_NAME_LEN, "C1");
- strncpy(state->desc, "SuperH Sleep Mode [SF]", CPUIDLE_DESC_LEN);
- state->exit_latency = 100;
- state->target_residency = 1 * 2;
- state->power_usage = 1;
- state->flags = 0;
- state->flags |= CPUIDLE_FLAG_TIME_VALID;
- state->enter = cpuidle_sleep_enter;
+ if (sh_mobile_sleep_supported & SUSP_SH_SF) {
+ state = &dev->states[i++];
+ snprintf(state->name, CPUIDLE_NAME_LEN, "C1");
+ strncpy(state->desc, "SuperH Sleep Mode [SF]",
+ CPUIDLE_DESC_LEN);
+ state->exit_latency = 100;
+ state->target_residency = 1 * 2;
+ state->power_usage = 1;
+ state->flags = 0;
+ state->flags |= CPUIDLE_FLAG_TIME_VALID;
+ state->enter = cpuidle_sleep_enter;
+ }
- state = &dev->states[i++];
- snprintf(state->name, CPUIDLE_NAME_LEN, "C2");
- strncpy(state->desc, "SuperH Mobile Standby Mode [SF]", CPUIDLE_DESC_LEN);
- state->exit_latency = 2300;
- state->target_residency = 1 * 2;
- state->power_usage = 1;
- state->flags = 0;
- state->flags |= CPUIDLE_FLAG_TIME_VALID;
- state->enter = cpuidle_sleep_enter;
+ if (sh_mobile_sleep_supported & SUSP_SH_STANDBY) {
+ state = &dev->states[i++];
+ snprintf(state->name, CPUIDLE_NAME_LEN, "C2");
+ strncpy(state->desc, "SuperH Mobile Standby Mode [SF]",
+ CPUIDLE_DESC_LEN);
+ state->exit_latency = 2300;
+ state->target_residency = 1 * 2;
+ state->power_usage = 1;
+ state->flags = 0;
+ state->flags |= CPUIDLE_FLAG_TIME_VALID;
+ state->enter = cpuidle_sleep_enter;
+ }
dev->state_count = i;
diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c
index cb3d28f2968c..a94dc480f0c1 100644
--- a/arch/sh/kernel/cpu/shmobile/pm.c
+++ b/arch/sh/kernel/cpu/shmobile/pm.c
@@ -67,6 +67,8 @@ extern char sh_mobile_sleep_enter_end;
extern char sh_mobile_sleep_resume_start;
extern char sh_mobile_sleep_resume_end;
+unsigned long sh_mobile_sleep_supported = SUSP_SH_SLEEP;
+
void sh_mobile_register_self_refresh(unsigned long flags,
void *pre_start, void *pre_end,
void *post_start, void *post_end)
@@ -103,10 +105,15 @@ void sh_mobile_register_self_refresh(unsigned long flags,
vp = onchip_mem + 0x600; /* located at interrupt vector */
n = &sh_mobile_sleep_resume_end - &sh_mobile_sleep_resume_start;
memcpy(vp, &sh_mobile_sleep_resume_start, n);
+
+ sh_mobile_sleep_supported |= flags;
}
static int sh_pm_enter(suspend_state_t state)
{
+ if (!(sh_mobile_sleep_supported & SUSP_MODE_STANDBY_SF))
+ return -ENXIO;
+
local_irq_disable();
set_bl_bit();
sh_mobile_call_standby(SUSP_MODE_STANDBY_SF);
From 99675a7a45ed3cec54d6e1d11f13bcaacaf0909b Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 04:24:23 +0000
Subject: [PATCH 083/137] sh: Add MMU and Cache handling sleep mode code
Add MMU and cache handling functionality to the SuperH Mobile
sleep code. The MMU and cache registers are saved and restored.
The MMU is disabled and the cache is flushed and disabled before
entering sleep modes if the SUSP_SH_MMU flag is set. This flag
should be set in the case of R-standby and most likely for future
U-standby support as well.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/suspend.h | 15 +++++
arch/sh/kernel/asm-offsets.c | 10 ++++
arch/sh/kernel/cpu/shmobile/pm.c | 15 +++++
arch/sh/kernel/cpu/shmobile/sleep.S | 92 +++++++++++++++++++++++++++++
4 files changed, 132 insertions(+)
diff --git a/arch/sh/include/asm/suspend.h b/arch/sh/include/asm/suspend.h
index 8eddf236fb85..702025d960a0 100644
--- a/arch/sh/include/asm/suspend.h
+++ b/arch/sh/include/asm/suspend.h
@@ -38,6 +38,20 @@ void sh_mobile_register_self_refresh(unsigned long flags,
/* register structure for address/data information */
struct sh_sleep_regs {
unsigned long stbcr;
+
+ /* MMU */
+ unsigned long pteh;
+ unsigned long ptel;
+ unsigned long ttb;
+ unsigned long tea;
+ unsigned long mmucr;
+ unsigned long ptea;
+ unsigned long pascr;
+ unsigned long irmcr;
+
+ /* Cache */
+ unsigned long ccr;
+ unsigned long ramcr;
};
/* data area for low-level sleep code */
@@ -72,5 +86,6 @@ extern unsigned long sh_mobile_sleep_supported;
#define SUSP_SH_RSTANDBY (1 << 2) /* SH-Mobile R-standby mode */
#define SUSP_SH_USTANDBY (1 << 3) /* SH-Mobile U-standby mode */
#define SUSP_SH_SF (1 << 4) /* Enable self-refresh */
+#define SUSP_SH_MMU (1 << 5) /* Save/restore MMU and cache */
#endif /* _ASM_SH_SUSPEND_H */
diff --git a/arch/sh/kernel/asm-offsets.c b/arch/sh/kernel/asm-offsets.c
index 9bdeff962e1c..6026b0f849a1 100644
--- a/arch/sh/kernel/asm-offsets.c
+++ b/arch/sh/kernel/asm-offsets.c
@@ -44,5 +44,15 @@ int main(void)
DEFINE(SH_SLEEP_BASE_ADDR, offsetof(struct sh_sleep_data, addr));
DEFINE(SH_SLEEP_BASE_DATA, offsetof(struct sh_sleep_data, data));
DEFINE(SH_SLEEP_REG_STBCR, offsetof(struct sh_sleep_regs, stbcr));
+ DEFINE(SH_SLEEP_REG_PTEH, offsetof(struct sh_sleep_regs, pteh));
+ DEFINE(SH_SLEEP_REG_PTEL, offsetof(struct sh_sleep_regs, ptel));
+ DEFINE(SH_SLEEP_REG_TTB, offsetof(struct sh_sleep_regs, ttb));
+ DEFINE(SH_SLEEP_REG_TEA, offsetof(struct sh_sleep_regs, tea));
+ DEFINE(SH_SLEEP_REG_MMUCR, offsetof(struct sh_sleep_regs, mmucr));
+ DEFINE(SH_SLEEP_REG_PTEA, offsetof(struct sh_sleep_regs, ptea));
+ DEFINE(SH_SLEEP_REG_PASCR, offsetof(struct sh_sleep_regs, pascr));
+ DEFINE(SH_SLEEP_REG_IRMCR, offsetof(struct sh_sleep_regs, irmcr));
+ DEFINE(SH_SLEEP_REG_CCR, offsetof(struct sh_sleep_regs, ccr));
+ DEFINE(SH_SLEEP_REG_RAMCR, offsetof(struct sh_sleep_regs, ramcr));
return 0;
}
diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c
index a94dc480f0c1..ca642f39e2e3 100644
--- a/arch/sh/kernel/cpu/shmobile/pm.c
+++ b/arch/sh/kernel/cpu/shmobile/pm.c
@@ -15,6 +15,7 @@
#include <linux/suspend.h>
#include <asm/suspend.h>
#include <asm/uaccess.h>
+#include <asm/cacheflush.h>
/*
* Notifier lists for pre/post sleep notification
@@ -54,6 +55,10 @@ void sh_mobile_call_standby(unsigned long mode)
atomic_notifier_call_chain(&sh_mobile_pre_sleep_notifier_list,
mode, NULL);
+ /* flush the caches if MMU flag is set */
+ if (mode & SUSP_SH_MMU)
+ flush_cache_all();
+
/* Let assembly snippet in on-chip memory handle the rest */
standby_onchip_mem(mode, ILRAM_BASE);
@@ -81,6 +86,16 @@ void sh_mobile_register_self_refresh(unsigned long flags,
/* part 0: data area */
sdp = onchip_mem;
sdp->addr.stbcr = 0xa4150020; /* STBCR */
+ sdp->addr.pteh = 0xff000000; /* PTEH */
+ sdp->addr.ptel = 0xff000004; /* PTEL */
+ sdp->addr.ttb = 0xff000008; /* TTB */
+ sdp->addr.tea = 0xff00000c; /* TEA */
+ sdp->addr.mmucr = 0xff000010; /* MMUCR */
+ sdp->addr.ptea = 0xff000034; /* PTEA */
+ sdp->addr.pascr = 0xff000070; /* PASCR */
+ sdp->addr.irmcr = 0xff000078; /* IRMCR */
+ sdp->addr.ccr = 0xff00001c; /* CCR */
+ sdp->addr.ramcr = 0xff000074; /* RAMCR */
vp = sdp + 1;
/* part 1: common code to enter sleep mode */
diff --git a/arch/sh/kernel/cpu/shmobile/sleep.S b/arch/sh/kernel/cpu/shmobile/sleep.S
index d3221d9b88be..e620bf397af5 100644
--- a/arch/sh/kernel/cpu/shmobile/sleep.S
+++ b/arch/sh/kernel/cpu/shmobile/sleep.S
@@ -52,6 +52,57 @@ ENTRY(sh_mobile_sleep_enter_start)
bsr save_register
mov #SH_SLEEP_REG_STBCR, r0
+ /* save mmu and cache context if needed */
+ mov.l @(SH_SLEEP_MODE, r5), r0
+ tst #SUSP_SH_MMU, r0
+ bt skip_mmu_save_disable
+
+ /* save mmu state */
+ bsr save_register
+ mov #SH_SLEEP_REG_PTEH, r0
+
+ bsr save_register
+ mov #SH_SLEEP_REG_PTEL, r0
+
+ bsr save_register
+ mov #SH_SLEEP_REG_TTB, r0
+
+ bsr save_register
+ mov #SH_SLEEP_REG_TEA, r0
+
+ bsr save_register
+ mov #SH_SLEEP_REG_MMUCR, r0
+
+ bsr save_register
+ mov #SH_SLEEP_REG_PTEA, r0
+
+ bsr save_register
+ mov #SH_SLEEP_REG_PASCR, r0
+
+ bsr save_register
+ mov #SH_SLEEP_REG_IRMCR, r0
+
+ /* invalidate TLBs and disable the MMU */
+ bsr get_register
+ mov #SH_SLEEP_REG_MMUCR, r0
+ mov #4, r1
+ mov.l r1, @r0
+ icbi @r0
+
+ /* save cache registers and disable caches */
+ bsr save_register
+ mov #SH_SLEEP_REG_CCR, r0
+
+ bsr save_register
+ mov #SH_SLEEP_REG_RAMCR, r0
+
+ bsr get_register
+ mov #SH_SLEEP_REG_CCR, r0
+ mov #0, r1
+ mov.l r1, @r0
+ icbi @r0
+
+skip_mmu_save_disable:
/* call self-refresh entering code if needed */
mov.l @(SH_SLEEP_MODE, r5), r0
tst #SUSP_SH_SF, r0
@@ -166,6 +217,47 @@ ENTRY(sh_mobile_sleep_resume_start)
nop
skip_restore_sf:
+ /* restore mmu and cache state if needed */
+ mov.l @(SH_SLEEP_MODE, r5), r0
+ tst #SUSP_SH_MMU, r0
+ bt skip_restore_mmu
+
+ /* restore mmu state */
+ bsr restore_register
+ mov #SH_SLEEP_REG_PTEH, r0
+
+ bsr restore_register
+ mov #SH_SLEEP_REG_PTEL, r0
+
+ bsr restore_register
+ mov #SH_SLEEP_REG_TTB, r0
+
+ bsr restore_register
+ mov #SH_SLEEP_REG_TEA, r0
+
+ bsr restore_register
+ mov #SH_SLEEP_REG_PTEA, r0
+
+ bsr restore_register
+ mov #SH_SLEEP_REG_PASCR, r0
+
+ bsr restore_register
+ mov #SH_SLEEP_REG_IRMCR, r0
+
+ bsr restore_register
+ mov #SH_SLEEP_REG_MMUCR, r0
+ icbi @r0
+
+ /* restore cache settings */
+ bsr restore_register
+ mov #SH_SLEEP_REG_RAMCR, r0
+ icbi @r0
+
+ bsr restore_register
+ mov #SH_SLEEP_REG_CCR, r0
+ icbi @r0
+
+skip_restore_mmu:
rte
nop
From 03625e7107cde46e2851557ec06426799e6ae7f2 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 04:24:32 +0000
Subject: [PATCH 084/137] sh: Use RSMEM for sleep code on sh7724
Use RSMEM instead of ILMEM for sleep mode code storage on SH7724.
This allows us to use R-standby mode on SH7724.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/shmobile/pm.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c
index ca642f39e2e3..4bd5e5302bfb 100644
--- a/arch/sh/kernel/cpu/shmobile/pm.c
+++ b/arch/sh/kernel/cpu/shmobile/pm.c
@@ -41,11 +41,15 @@ ATOMIC_NOTIFIER_HEAD(sh_mobile_post_sleep_notifier_list);
* U-standby mode is low priority since it needs bootloader hacks
*/
-#define ILRAM_BASE 0xe5200000
+#ifdef CONFIG_CPU_SUBTYPE_SH7724
+#define RAM_BASE 0xfd800000 /* RSMEM */
+#else
+#define RAM_BASE 0xe5200000 /* ILRAM */
+#endif
void sh_mobile_call_standby(unsigned long mode)
{
- void *onchip_mem = (void *)ILRAM_BASE;
+ void *onchip_mem = (void *)RAM_BASE;
struct sh_sleep_data *sdp = onchip_mem;
void (*standby_onchip_mem)(unsigned long, unsigned long);
@@ -60,7 +64,7 @@ void sh_mobile_call_standby(unsigned long mode)
flush_cache_all();
/* Let assembly snippet in on-chip memory handle the rest */
- standby_onchip_mem(mode, ILRAM_BASE);
+ standby_onchip_mem(mode, RAM_BASE);
atomic_notifier_call_chain(&sh_mobile_post_sleep_notifier_list,
mode, NULL);
@@ -78,7 +82,7 @@ void sh_mobile_register_self_refresh(unsigned long flags,
void *pre_start, void *pre_end,
void *post_start, void *post_end)
{
- void *onchip_mem = (void *)ILRAM_BASE;
+ void *onchip_mem = (void *)RAM_BASE;
void *vp;
struct sh_sleep_data *sdp;
int n;
From bb3e0eed9dd51987c7462bae2880a3d4d750c55a Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 04:24:40 +0000
Subject: [PATCH 085/137] sh: Add R-standby sleep mode support
Add R-standby specific bits to the SuperH Mobile sleep code.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/suspend.h | 5 +++++
arch/sh/kernel/asm-offsets.c | 3 +++
arch/sh/kernel/cpu/shmobile/pm.c | 13 ++++++-------
arch/sh/kernel/cpu/shmobile/sleep.S | 12 ++++++++++++
4 files changed, 26 insertions(+), 7 deletions(-)
diff --git a/arch/sh/include/asm/suspend.h b/arch/sh/include/asm/suspend.h
index 702025d960a0..fe9c2a1ad047 100644
--- a/arch/sh/include/asm/suspend.h
+++ b/arch/sh/include/asm/suspend.h
@@ -38,6 +38,7 @@ void sh_mobile_register_self_refresh(unsigned long flags,
/* register structure for address/data information */
struct sh_sleep_regs {
unsigned long stbcr;
+ unsigned long bar;
/* MMU */
unsigned long pteh;
@@ -63,10 +64,14 @@ struct sh_sleep_data {
unsigned long sf_pre;
unsigned long sf_post;
+ /* address of resume code */
+ unsigned long resume;
+
/* register state saved and restored by the assembly code */
unsigned long vbr;
unsigned long spc;
unsigned long sr;
+ unsigned long sp;
/* structure for keeping register addresses */
struct sh_sleep_regs addr;
diff --git a/arch/sh/kernel/asm-offsets.c b/arch/sh/kernel/asm-offsets.c
index 6026b0f849a1..08a2be775b6c 100644
--- a/arch/sh/kernel/asm-offsets.c
+++ b/arch/sh/kernel/asm-offsets.c
@@ -38,12 +38,15 @@ int main(void)
DEFINE(SH_SLEEP_MODE, offsetof(struct sh_sleep_data, mode));
DEFINE(SH_SLEEP_SF_PRE, offsetof(struct sh_sleep_data, sf_pre));
DEFINE(SH_SLEEP_SF_POST, offsetof(struct sh_sleep_data, sf_post));
+ DEFINE(SH_SLEEP_RESUME, offsetof(struct sh_sleep_data, resume));
DEFINE(SH_SLEEP_VBR, offsetof(struct sh_sleep_data, vbr));
DEFINE(SH_SLEEP_SPC, offsetof(struct sh_sleep_data, spc));
DEFINE(SH_SLEEP_SR, offsetof(struct sh_sleep_data, sr));
+ DEFINE(SH_SLEEP_SP, offsetof(struct sh_sleep_data, sp));
DEFINE(SH_SLEEP_BASE_ADDR, offsetof(struct sh_sleep_data, addr));
DEFINE(SH_SLEEP_BASE_DATA, offsetof(struct sh_sleep_data, data));
DEFINE(SH_SLEEP_REG_STBCR, offsetof(struct sh_sleep_regs, stbcr));
+ DEFINE(SH_SLEEP_REG_BAR, offsetof(struct sh_sleep_regs, bar));
DEFINE(SH_SLEEP_REG_PTEH, offsetof(struct sh_sleep_regs, pteh));
DEFINE(SH_SLEEP_REG_PTEL, offsetof(struct sh_sleep_regs, ptel));
DEFINE(SH_SLEEP_REG_TTB, offsetof(struct sh_sleep_regs, ttb));
diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c
index 4bd5e5302bfb..ca029a44743c 100644
--- a/arch/sh/kernel/cpu/shmobile/pm.c
+++ b/arch/sh/kernel/cpu/shmobile/pm.c
@@ -33,13 +33,10 @@ ATOMIC_NOTIFIER_HEAD(sh_mobile_post_sleep_notifier_list);
#define SUSP_MODE_SLEEP (SUSP_SH_SLEEP)
#define SUSP_MODE_SLEEP_SF (SUSP_SH_SLEEP | SUSP_SH_SF)
#define SUSP_MODE_STANDBY_SF (SUSP_SH_STANDBY | SUSP_SH_SF)
-
-/*
- * The following modes are not there yet:
- *
- * R-standby mode is unsupported, but will be added in the future
- * U-standby mode is low priority since it needs bootloader hacks
- */
+#define SUSP_MODE_RSTANDBY (SUSP_SH_RSTANDBY | SUSP_SH_MMU | SUSP_SH_SF)
+ /*
+ * U-standby mode is unsupported since it needs bootloader hacks
+ */
#ifdef CONFIG_CPU_SUBTYPE_SH7724
#define RAM_BASE 0xfd800000 /* RSMEM */
@@ -90,6 +87,7 @@ void sh_mobile_register_self_refresh(unsigned long flags,
/* part 0: data area */
sdp = onchip_mem;
sdp->addr.stbcr = 0xa4150020; /* STBCR */
+ sdp->addr.bar = 0xa4150040; /* BAR */
sdp->addr.pteh = 0xff000000; /* PTEH */
sdp->addr.ptel = 0xff000004; /* PTEL */
sdp->addr.ttb = 0xff000008; /* TTB */
@@ -124,6 +122,7 @@ void sh_mobile_register_self_refresh(unsigned long flags,
vp = onchip_mem + 0x600; /* located at interrupt vector */
n = &sh_mobile_sleep_resume_end - &sh_mobile_sleep_resume_start;
memcpy(vp, &sh_mobile_sleep_resume_start, n);
+ sdp->resume = (unsigned long)vp;
sh_mobile_sleep_supported |= flags;
}
diff --git a/arch/sh/kernel/cpu/shmobile/sleep.S b/arch/sh/kernel/cpu/shmobile/sleep.S
index e620bf397af5..e9dd7fa0abd2 100644
--- a/arch/sh/kernel/cpu/shmobile/sleep.S
+++ b/arch/sh/kernel/cpu/shmobile/sleep.S
@@ -48,6 +48,9 @@ ENTRY(sh_mobile_sleep_enter_start)
stc sr, r0
mov.l r0, @(SH_SLEEP_SR, r5)
+ /* save sp */
+ mov.l r15, @(SH_SLEEP_SP, r5)
+
/* save stbcr */
bsr save_register
mov #SH_SLEEP_REG_STBCR, r0
@@ -125,6 +128,12 @@ test_rstandby:
tst #SUSP_SH_RSTANDBY, r0
bt test_ustandby
+ /* setup BAR register */
+ bsr get_register
+ mov #SH_SLEEP_REG_BAR, r0
+ mov.l @(SH_SLEEP_RESUME, r5), r1
+ mov.l r1, @r0
+
/* set mode to "r-standby mode" */
bra do_sleep
mov #0x20, r1
@@ -203,6 +212,9 @@ ENTRY(sh_mobile_sleep_resume_start)
mov.l @(SH_SLEEP_SR, r5), r0
ldc r0, ssr
+ /* restore sp */
+ mov.l @(SH_SLEEP_SP, r5), r15
+
/* restore sleep mode register */
bsr restore_register
mov #SH_SLEEP_REG_STBCR, r0
From 58ee987e2fd8acff6263d194d8fa43267cc8b1c9 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 04:24:48 +0000
Subject: [PATCH 086/137] sh: Add KFR2R09 specific memory pre/post R-standby
code
Add R-standby support to the KFR2R09 sdram code.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-kfr2r09/sdram.S | 28 ++++++++++++++++++++++++++++
arch/sh/boards/mach-kfr2r09/setup.c | 3 ++-
2 files changed, 30 insertions(+), 1 deletion(-)
diff --git a/arch/sh/boards/mach-kfr2r09/sdram.S b/arch/sh/boards/mach-kfr2r09/sdram.S
index 4ce78fcf5674..0c9f55bec2fe 100644
--- a/arch/sh/boards/mach-kfr2r09/sdram.S
+++ b/arch/sh/boards/mach-kfr2r09/sdram.S
@@ -39,6 +39,10 @@ ENTRY(kfr2r09_sdram_leave_start)
/* DBSC: put memory in auto-refresh mode */
+ mov.l @(SH_SLEEP_MODE, r5), r0
+ tst #SUSP_SH_RSTANDBY, r0
+ bf resume_rstandby
+
ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
WAIT 1
ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
@@ -49,4 +53,28 @@ ENTRY(kfr2r09_sdram_leave_start)
rts
nop
+resume_rstandby:
+
+ /* DBSC: re-initialize and put in auto-refresh */
+
+ ED 0xFD000108, 0x40000301 /* DBPDCNT0 */
+ ED 0xFD000020, 0x011B0002 /* DBCONF */
+ ED 0xFD000030, 0x03060E02 /* DBTR0 */
+ ED 0xFD000034, 0x01020102 /* DBTR1 */
+ ED 0xFD000038, 0x01090406 /* DBTR2 */
+ ED 0xFD000008, 0x00000004 /* DBKIND */
+ ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
+ ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+ ED 0xFD000018, 0x00000001 /* DBCKECNT */
+ WAIT 1
+ ED 0xFD000010, 0x00000001 /* DBEN */
+ ED 0xFD000044, 0x000004AF /* DBRFPDN1 */
+ ED 0xFD000048, 0x20CF0037 /* DBRFPDN2 */
+ ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+ ED 0xFD000108, 0x40000300 /* DBPDCNT0 */
+ ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
+
+ rts
+ nop
+
ENTRY(kfr2r09_sdram_leave_end)
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index 5dae632092f2..fe80ad0a41f6 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -453,7 +453,8 @@ extern char kfr2r09_sdram_leave_end;
static int __init kfr2r09_devices_setup(void)
{
/* register board specific self-refresh code */
- sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
+ sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF |
+ SUSP_SH_RSTANDBY,
&kfr2r09_sdram_enter_start,
&kfr2r09_sdram_enter_end,
&kfr2r09_sdram_leave_start,
From 1ce7b039b5029ab698f9d64c0ad603794bc31ae7 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 2 Nov 2009 10:30:26 +0900
Subject: [PATCH 087/137] sh: intc: dynamic IRQ support.
This adds support for dynamic IRQ allocation/deallocation for all parts
using the SH-style vectored IRQs. While this is not inherently
INTC-specific, the INTC code is the main tie-in for vectored IRQ
registration, and is the only place that a full view of the utilized
vector map is possible.
The implementation is fairly straightforward, implementing a flat IRQ map
where each registered vector is reserved, allowing us to scan for holes
and dynamically wire up IRQs lazily later on in the boot stage. This
piggybacks on top of sparseirq in order to make the best use of the
available vector space.
Dynamic IRQs can be used for any number of things, ranging from MSI in
the SH-X3 PCIe case down to demux vectors for board FPGAs and system
controllers that presently allocate an arbitrary range. In the latter
case, this also allows those platforms to use sparseirq without blowing
up, which brings us one step closer to enabling sparseirq as the default
for all platform and CPU combinations.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/sh/intc.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 83 insertions(+), 1 deletion(-)
diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c
index 94e6e46ff82c..4789df43c0f9 100644
--- a/drivers/sh/intc.c
+++ b/drivers/sh/intc.c
@@ -2,6 +2,7 @@
* Shared interrupt handling code for IPR and INTC2 types of IRQs.
*
* Copyright (C) 2007, 2008 Magnus Damm
+ * Copyright (C) 2009 Paul Mundt
*
* Based on intc2.c and ipr.c
*
@@ -24,6 +25,7 @@
#include <linux/sysdev.h>
#include <linux/list.h>
#include <linux/topology.h>
+#include <linux/bitmap.h>
#define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
@@ -59,6 +61,20 @@ struct intc_desc_int {
static LIST_HEAD(intc_list);
+/*
+ * The intc_irq_map provides a global map of bound IRQ vectors for a
+ * given platform. Allocation of IRQs are either static through the CPU
+ * vector map, or dynamic in the case of board mux vectors or MSI.
+ *
+ * As this is a central point for all IRQ controllers on the system,
+ * each of the available sources are mapped out here. This combined with
+ * sparseirq makes it quite trivial to keep the vector map tightly packed
+ * when dynamically creating IRQs, as well as tying in to otherwise
+ * unused irq_desc positions in the sparse array.
+ */
+static DECLARE_BITMAP(intc_irq_map, NR_IRQS);
+static DEFINE_SPINLOCK(vector_lock);
+
#ifdef CONFIG_SMP
#define IS_SMP(x) x.smp
#define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
@@ -566,6 +582,11 @@ static void __init intc_register_irq(struct intc_desc *desc,
struct intc_handle_int *hp;
unsigned int data[2], primary;
+ /*
+ * Register the IRQ position with the global IRQ map
+ */
+ set_bit(irq, intc_irq_map);
+
/* Prefer single interrupt source bitmap over other combinations:
* 1. bitmap, single interrupt source
* 2. priority, single interrupt source
@@ -844,5 +865,66 @@ static int __init register_intc_sysdevs(void)
return error;
}
-
device_initcall(register_intc_sysdevs);
+
+/*
+ * Dynamic IRQ allocation and deallocation
+ */
+static unsigned int create_irq_on_node(unsigned int irq_want, int node)
+{
+ unsigned int irq = 0, new;
+ unsigned long flags;
+ struct irq_desc *desc;
+
+ spin_lock_irqsave(&vector_lock, flags);
+
+ /*
+ * First try the wanted IRQ, then scan.
+ */
+ if (test_and_set_bit(irq_want, intc_irq_map)) {
+ new = find_first_zero_bit(intc_irq_map, nr_irqs);
+ if (unlikely(new == nr_irqs))
+ goto out_unlock;
+
+ desc = irq_to_desc_alloc_node(new, node);
+ if (unlikely(!desc)) {
+ pr_info("can't get irq_desc for %d\n", new);
+ goto out_unlock;
+ }
+
+ desc = move_irq_desc(desc, node);
+ __set_bit(new, intc_irq_map);
+ irq = new;
+ }
+
+out_unlock:
+ spin_unlock_irqrestore(&vector_lock, flags);
+
+ if (irq > 0)
+ dynamic_irq_init(irq);
+
+ return irq;
+}
+
+int create_irq(void)
+{
+ int nid = cpu_to_node(smp_processor_id());
+ int irq;
+
+ irq = create_irq_on_node(NR_IRQS_LEGACY, nid);
+ if (irq == 0)
+ irq = -1;
+
+ return irq;
+}
+
+void destroy_irq(unsigned int irq)
+{
+ unsigned long flags;
+
+ dynamic_irq_cleanup(irq);
+
+ spin_lock_irqsave(&vector_lock, flags);
+ __clear_bit(irq, intc_irq_map);
+ spin_unlock_irqrestore(&vector_lock, flags);
+}
From 8b431a7e662396c4f873d01a2be73500259e100b Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 06:22:03 +0000
Subject: [PATCH 088/137] sh: Add SDHI1 support to the AP325RXA board
Update the SDHI platform data for the AP325RXA board
to include support for the CN7 Micro SD Card slot.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-ap325rxa/setup.c | 36 +++++++++++++++++++++++++++-
1 file changed, 35 insertions(+), 1 deletion(-)
diff --git a/arch/sh/boards/mach-ap325rxa/setup.c b/arch/sh/boards/mach-ap325rxa/setup.c
index be8da973f00f..cf9dc12dfeb1 100644
--- a/arch/sh/boards/mach-ap325rxa/setup.c
+++ b/arch/sh/boards/mach-ap325rxa/setup.c
@@ -423,6 +423,7 @@ static struct resource sdhi0_cn3_resources[] = {
static struct platform_device sdhi0_cn3_device = {
.name = "sh_mobile_sdhi",
+ .id = 0, /* "sdhi0" clock */
.num_resources = ARRAY_SIZE(sdhi0_cn3_resources),
.resource = sdhi0_cn3_resources,
.archdata = {
@@ -430,6 +431,29 @@ static struct platform_device sdhi0_cn3_device = {
},
};
+static struct resource sdhi1_cn7_resources[] = {
+ [0] = {
+ .name = "SDHI1",
+ .start = 0x04cf0000,
+ .end = 0x04cf01ff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 24,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device sdhi1_cn7_device = {
+ .name = "sh_mobile_sdhi",
+ .id = 1, /* "sdhi1" clock */
+ .num_resources = ARRAY_SIZE(sdhi1_cn7_resources),
+ .resource = sdhi1_cn7_resources,
+ .archdata = {
+ .hwblk_id = HWBLK_SDHI1,
+ },
+};
+
static struct i2c_board_info __initdata ap325rxa_i2c_devices[] = {
{
I2C_BOARD_INFO("pcf8563", 0x51),
@@ -478,6 +502,7 @@ static struct platform_device *ap325rxa_devices[] __initdata = {
&ceu_device,
&nand_flash_device,
&sdhi0_cn3_device,
+ &sdhi1_cn7_device,
&ap325rxa_camera[0],
&ap325rxa_camera[1],
};
@@ -588,7 +613,7 @@ static int __init ap325rxa_devices_setup(void)
platform_resource_setup_memory(&ceu_device, "ceu", 4 << 20);
- /* SDHI0 */
+ /* SDHI0 - CN3 - SD CARD */
gpio_request(GPIO_FN_SDHI0CD_PTD, NULL);
gpio_request(GPIO_FN_SDHI0WP_PTD, NULL);
gpio_request(GPIO_FN_SDHI0D3_PTD, NULL);
@@ -598,6 +623,15 @@ static int __init ap325rxa_devices_setup(void)
gpio_request(GPIO_FN_SDHI0CMD_PTD, NULL);
gpio_request(GPIO_FN_SDHI0CLK_PTD, NULL);
+ /* SDHI1 - CN7 - MICRO SD CARD */
+ gpio_request(GPIO_FN_SDHI1CD, NULL);
+ gpio_request(GPIO_FN_SDHI1D3, NULL);
+ gpio_request(GPIO_FN_SDHI1D2, NULL);
+ gpio_request(GPIO_FN_SDHI1D1, NULL);
+ gpio_request(GPIO_FN_SDHI1D0, NULL);
+ gpio_request(GPIO_FN_SDHI1CMD, NULL);
+ gpio_request(GPIO_FN_SDHI1CLK, NULL);
+
i2c_register_board_info(0, ap325rxa_i2c_devices,
ARRAY_SIZE(ap325rxa_i2c_devices));
From 3d0de414423a20af741b692243317f423827489b Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 30 Oct 2009 06:26:04 +0000
Subject: [PATCH 089/137] sh: Remove unused WP signal for SDHI0 and KFR2R09
Get rid of the unused WP signal for SDHI0 on KFR2R09.
This because yc304 on KFR2R09 is a Micro SD slot which
does not implement the WP signal.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-kfr2r09/setup.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index fe80ad0a41f6..85fa8a3b7f73 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -539,7 +539,6 @@ static int __init kfr2r09_devices_setup(void)
/* SDHI0 connected to yc304 */
gpio_request(GPIO_FN_SDHI0CD, NULL);
- gpio_request(GPIO_FN_SDHI0WP, NULL);
gpio_request(GPIO_FN_SDHI0D3, NULL);
gpio_request(GPIO_FN_SDHI0D2, NULL);
gpio_request(GPIO_FN_SDHI0D1, NULL);
From 45b9deaf14e74543371aa8faea69c14e27b038c6 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 2 Nov 2009 15:43:20 +0900
Subject: [PATCH 090/137] sh: intc: Handle legacy IRQ reservation in vector
map.
Different CPUs will have different starting vectors, with varying
amounts of reserved or unusable vector space prior to the first slot.
This introduces a legacy vector reservation system that inserts itself in
between the CPU vector map registration and the platform specific IRQ
setup. This works fine in practice as the only new vectors that boards
need to establish on their own should be dynamically allocated rather
than arbitrarily assigned. As a plus, this also makes all of the
converted platforms sparseirq ready.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/irq.c | 6 ++++++
drivers/sh/intc.c | 25 +++++++++++++++++++++++++
include/linux/sh_intc.h | 3 +++
3 files changed, 34 insertions(+)
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index 7aa89fac1f81..e1913f28f418 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -263,6 +263,12 @@ void __init init_IRQ(void)
{
plat_irq_setup();
+ /*
+ * Pin any of the legacy IRQ vectors that haven't already been
+ * grabbed by the platform
+ */
+ reserve_irq_legacy();
+
/* Perform the machine specific initialisation */
if (sh_mv.mv_init_irq)
sh_mv.mv_init_irq();
diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c
index 4789df43c0f9..a7e5c2e9986c 100644
--- a/drivers/sh/intc.c
+++ b/drivers/sh/intc.c
@@ -928,3 +928,28 @@ void destroy_irq(unsigned int irq)
__clear_bit(irq, intc_irq_map);
spin_unlock_irqrestore(&vector_lock, flags);
}
+
+int reserve_irq_vector(unsigned int irq)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&vector_lock, flags);
+ if (test_and_set_bit(irq, intc_irq_map))
+ ret = -EBUSY;
+ spin_unlock_irqrestore(&vector_lock, flags);
+
+ return ret;
+}
+
+void reserve_irq_legacy(void)
+{
+ unsigned long flags;
+ int i, j;
+
+ spin_lock_irqsave(&vector_lock, flags);
+ j = find_first_bit(intc_irq_map, nr_irqs);
+ for (i = 0; i < j; i++)
+ __set_bit(i, intc_irq_map);
+ spin_unlock_irqrestore(&vector_lock, flags);
+}
diff --git a/include/linux/sh_intc.h b/include/linux/sh_intc.h
index 4e4b22d50164..4ef246f14654 100644
--- a/include/linux/sh_intc.h
+++ b/include/linux/sh_intc.h
@@ -84,4 +84,7 @@ struct intc_desc symbol __initdata = { \
void __init register_intc_controller(struct intc_desc *desc);
int intc_set_priority(unsigned int irq, unsigned int prio);
+int reserve_irq_vector(unsigned int irq);
+void reserve_irq_legacy(void);
+
#endif /* __SH_INTC_H */
From a37c6c7aec38a693f87ee5ccc6e60a5b3ee700f2 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 4 Nov 2009 11:44:21 +0900
Subject: [PATCH 091/137] sh: mach-se: Convert SE7722 FPGA to dynamic IRQ
allocation.
This gets rid of the arbitrary set of vectors used by the SE7722 FPGA
interrupt controller and witches over to a completely dynamic set.
No assumptions regarding a contiguous range are made, and the platform
resources themselves need to be filled in lazily.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-se/7722/irq.c | 32 ++++++++++++++++-----------
arch/sh/boards/mach-se/7722/setup.c | 15 ++++++++-----
arch/sh/include/mach-se/mach/se7722.h | 11 ++-------
3 files changed, 31 insertions(+), 27 deletions(-)
diff --git a/arch/sh/boards/mach-se/7722/irq.c b/arch/sh/boards/mach-se/7722/irq.c
index 02d21a3e2a8f..4eb31acfafef 100644
--- a/arch/sh/boards/mach-se/7722/irq.c
+++ b/arch/sh/boards/mach-se/7722/irq.c
@@ -16,15 +16,17 @@
#include <asm/io.h>
#include <mach-se/mach/se7722.h>
+unsigned int se7722_fpga_irq[SE7722_FPGA_IRQ_NR] = { 0, };
+
static void disable_se7722_irq(unsigned int irq)
{
- unsigned int bit = irq - SE7722_FPGA_IRQ_BASE;
+ unsigned int bit = (unsigned int)get_irq_chip_data(irq);
ctrl_outw(ctrl_inw(IRQ01_MASK) | 1 << bit, IRQ01_MASK);
}
static void enable_se7722_irq(unsigned int irq)
{
- unsigned int bit = irq - SE7722_FPGA_IRQ_BASE;
+ unsigned int bit = (unsigned int)get_irq_chip_data(irq);
ctrl_outw(ctrl_inw(IRQ01_MASK) & ~(1 << bit), IRQ01_MASK);
}
@@ -38,18 +40,15 @@ static struct irq_chip se7722_irq_chip __read_mostly = {
static void se7722_irq_demux(unsigned int irq, struct irq_desc *desc)
{
unsigned short intv = ctrl_inw(IRQ01_STS);
- struct irq_desc *ext_desc;
- unsigned int ext_irq = SE7722_FPGA_IRQ_BASE;
+ unsigned int ext_irq = 0;
intv &= (1 << SE7722_FPGA_IRQ_NR) - 1;
- while (intv) {
- if (intv & 1) {
- ext_desc = irq_desc + ext_irq;
- handle_level_irq(ext_irq, ext_desc);
- }
- intv >>= 1;
- ext_irq++;
+ for (; intv; intv >>= 1, ext_irq++) {
+ if (!(intv & 1))
+ continue;
+
+ generic_handle_irq(se7722_fpga_irq[ext_irq]);
}
}
@@ -63,11 +62,18 @@ void __init init_se7722_IRQ(void)
ctrl_outw(0, IRQ01_MASK); /* disable all irqs */
ctrl_outw(0x2000, 0xb03fffec); /* mrshpc irq enable */
- for (i = 0; i < SE7722_FPGA_IRQ_NR; i++)
- set_irq_chip_and_handler_name(SE7722_FPGA_IRQ_BASE + i,
+ for (i = 0; i < SE7722_FPGA_IRQ_NR; i++) {
+ se7722_fpga_irq[i] = create_irq();
+ if (se7722_fpga_irq[i] < 0)
+ return;
+
+ set_irq_chip_and_handler_name(se7722_fpga_irq[i],
&se7722_irq_chip,
handle_level_irq, "level");
+ set_irq_chip_data(se7722_fpga_irq[i], (void *)i);
+ }
+
set_irq_chained_handler(IRQ0_IRQ, se7722_irq_demux);
set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW);
diff --git a/arch/sh/boards/mach-se/7722/setup.c b/arch/sh/boards/mach-se/7722/setup.c
index 36374078e521..d05f34f6528e 100644
--- a/arch/sh/boards/mach-se/7722/setup.c
+++ b/arch/sh/boards/mach-se/7722/setup.c
@@ -60,8 +60,7 @@ static struct resource smc91x_eth_resources[] = {
.flags = IORESOURCE_MEM,
},
[1] = {
- .start = SMC_IRQ,
- .end = SMC_IRQ,
+ /* Filled in later */
.flags = IORESOURCE_IRQ,
},
};
@@ -90,8 +89,7 @@ static struct resource cf_ide_resources[] = {
.flags = IORESOURCE_IO,
},
[2] = {
- .start = MRSHPC_IRQ0,
- .end = MRSHPC_IRQ0,
+ /* Filled in later */
.flags = IORESOURCE_IRQ,
},
};
@@ -153,6 +151,14 @@ static struct platform_device *se7722_devices[] __initdata = {
static int __init se7722_devices_setup(void)
{
mrshpc_setup_windows();
+
+ /* Wire-up dynamic vectors */
+ cf_ide_resources[2].start = cf_ide_resources[2].end =
+ se7722_fpga_irq[SE7722_FPGA_IRQ_MRSHPC0];
+
+ smc91x_eth_resources[1].start = smc91x_eth_resources[1].end =
+ se7722_fpga_irq[SE7722_FPGA_IRQ_SMC];
+
return platform_add_devices(se7722_devices, ARRAY_SIZE(se7722_devices));
}
device_initcall(se7722_devices_setup);
@@ -193,6 +199,5 @@ static void __init se7722_setup(char **cmdline_p)
static struct sh_machine_vector mv_se7722 __initmv = {
.mv_name = "Solution Engine 7722" ,
.mv_setup = se7722_setup ,
- .mv_nr_irqs = SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_NR,
.mv_init_irq = init_se7722_IRQ,
};
diff --git a/arch/sh/include/mach-se/mach/se7722.h b/arch/sh/include/mach-se/mach/se7722.h
index e971d9a82f4a..16505bfb8a9e 100644
--- a/arch/sh/include/mach-se/mach/se7722.h
+++ b/arch/sh/include/mach-se/mach/se7722.h
@@ -92,18 +92,11 @@
#define SE7722_FPGA_IRQ_MRSHPC1 3 /* IRQ1 */
#define SE7722_FPGA_IRQ_MRSHPC2 4 /* IRQ1 */
#define SE7722_FPGA_IRQ_MRSHPC3 5 /* IRQ1 */
-
#define SE7722_FPGA_IRQ_NR 6
-#define SE7722_FPGA_IRQ_BASE 110
-
-#define MRSHPC_IRQ3 (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_MRSHPC3)
-#define MRSHPC_IRQ2 (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_MRSHPC2)
-#define MRSHPC_IRQ1 (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_MRSHPC1)
-#define MRSHPC_IRQ0 (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_MRSHPC0)
-#define SMC_IRQ (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_SMC)
-#define USB_IRQ (SE7722_FPGA_IRQ_BASE + SE7722_FPGA_IRQ_USB)
/* arch/sh/boards/se/7722/irq.c */
+extern unsigned int se7722_fpga_irq[];
+
void init_se7722_IRQ(void);
#define __IO_PREFIX se7722
From c4b973f532206e1a67b1beae654b44c8be26fc44 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Mon, 2 Nov 2009 09:31:03 +0000
Subject: [PATCH 092/137] sh: Add RWDT save/restore code for sh7724 R-standby
Add sh7724 code to save and restore RWDT state during
R-standby. Without this patch the watchdog will generate
a reset shortly after resuming from R-standby.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4a/setup-sh7724.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index 6dc4469434ea..ac1505a8fd80 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -870,6 +870,9 @@ static struct {
unsigned char imr10;
unsigned char imr11;
unsigned char imr12;
+ /* RWDT */
+ unsigned short rwtcnt;
+ unsigned short rwtcsr;
} sh7724_rstandby_state;
static int sh7724_pre_sleep_notifier_call(struct notifier_block *nb,
@@ -920,6 +923,13 @@ static int sh7724_pre_sleep_notifier_call(struct notifier_block *nb,
sh7724_rstandby_state.imr11 = __raw_readb(0xa40800ac); /* IMR11 */
sh7724_rstandby_state.imr12 = __raw_readb(0xa40800b0); /* IMR12 */
+ /* RWDT */
+ sh7724_rstandby_state.rwtcnt = __raw_readb(0xa4520000); /* RWTCNT */
+ sh7724_rstandby_state.rwtcnt |= 0x5a00;
+ sh7724_rstandby_state.rwtcsr = __raw_readb(0xa4520004); /* RWTCSR */
+ sh7724_rstandby_state.rwtcsr |= 0xa500;
+ __raw_writew(sh7724_rstandby_state.rwtcsr & 0x07, 0xa4520004);
+
return NOTIFY_DONE;
}
@@ -970,6 +980,10 @@ static int sh7724_post_sleep_notifier_call(struct notifier_block *nb,
__raw_writeb(sh7724_rstandby_state.imr11, 0xa40800ac); /* IMR11 */
__raw_writeb(sh7724_rstandby_state.imr12, 0xa40800b0); /* IMR12 */
+ /* RWDT */
+ __raw_writew(sh7724_rstandby_state.rwtcnt, 0xa4520000); /* RWTCNT */
+ __raw_writew(sh7724_rstandby_state.rwtcsr, 0xa4520004); /* RWTCSR */
+
return NOTIFY_DONE;
}
From 9016332014404ae1dca7198f93804ac67ba9e918 Mon Sep 17 00:00:00 2001
From: Roel Kluin <roel.kluin@gmail.com>
Date: Mon, 2 Nov 2009 16:14:42 +0000
Subject: [PATCH 093/137] sh: Make sure indexes are positive
The indexes are signed, make sure they are not negative
when we read array elements.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-highlander/setup.c | 2 +-
arch/sh/boards/mach-r2d/irq.c | 2 +-
arch/sh/mm/numa.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/sh/boards/mach-highlander/setup.c b/arch/sh/boards/mach-highlander/setup.c
index 566e69d8d729..f663c14d8885 100644
--- a/arch/sh/boards/mach-highlander/setup.c
+++ b/arch/sh/boards/mach-highlander/setup.c
@@ -384,7 +384,7 @@ static unsigned char irl2irq[HL_NR_IRL];
static int highlander_irq_demux(int irq)
{
- if (irq >= HL_NR_IRL || !irl2irq[irq])
+ if (irq >= HL_NR_IRL || irq < 0 || !irl2irq[irq])
return irq;
return irl2irq[irq];
diff --git a/arch/sh/boards/mach-r2d/irq.c b/arch/sh/boards/mach-r2d/irq.c
index c70fecedcac4..78d7b27c80da 100644
--- a/arch/sh/boards/mach-r2d/irq.c
+++ b/arch/sh/boards/mach-r2d/irq.c
@@ -116,7 +116,7 @@ static unsigned char irl2irq[R2D_NR_IRL];
int rts7751r2d_irq_demux(int irq)
{
- if (irq >= R2D_NR_IRL || !irl2irq[irq])
+ if (irq >= R2D_NR_IRL || irq < 0 || !irl2irq[irq])
return irq;
return irl2irq[irq];
diff --git a/arch/sh/mm/numa.c b/arch/sh/mm/numa.c
index 9b784fdb947c..6c524446c0f6 100644
--- a/arch/sh/mm/numa.c
+++ b/arch/sh/mm/numa.c
@@ -60,7 +60,7 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
unsigned long bootmem_paddr;
/* Don't allow bogus node assignment */
- BUG_ON(nid > MAX_NUMNODES || nid == 0);
+ BUG_ON(nid > MAX_NUMNODES || nid <= 0);
start_pfn = start >> PAGE_SHIFT;
end_pfn = end >> PAGE_SHIFT;
From 5c1a56b5f616f7063f91eb85f0ea209658f387dc Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 4 Nov 2009 15:59:04 +0900
Subject: [PATCH 094/137] video: sh_mobile_lcdcfb: Don't attempt to map
zero-length scatterlists.
More aggressive DMA mapping debugging has uncovered a long-standing
buglet in the way that the sh_mobile_lcdcfb driver implements its
deferred I/O callback. When used as a console driver the acceleration
routines are called by the kernel which subsequently cause the deferred
I/O work to be scheduled, resulting in the deferred I/O callback being
entered without any dirty pages on the pagelist (the normal case for
userspace accesses). It's also possible to get in to this situation via
explicit calling of fsync() when nothing has dirtied the region.
Unfortunately it's not sufficient to skip over the callback when the
pagelist is empty given the console driver use case, so instead the
callback has to conditionalize the work for panel updates and DMA
mapping depending on whether anything is resident on the pagelist or
not.
Reported-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/video/sh_mobile_lcdcfb.c | 30 +++++++++++++++++++++++-------
1 file changed, 23 insertions(+), 7 deletions(-)
diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c
index 3ad5157f9899..b4b5de930cf5 100644
--- a/drivers/video/sh_mobile_lcdcfb.c
+++ b/drivers/video/sh_mobile_lcdcfb.c
@@ -281,18 +281,34 @@ static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
struct list_head *pagelist)
{
struct sh_mobile_lcdc_chan *ch = info->par;
- unsigned int nr_pages;
/* enable clocks before accessing hardware */
sh_mobile_lcdc_clk_on(ch->lcdc);
- nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
- dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
+ /*
+ * It's possible to get here without anything on the pagelist via
+ * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
+ * invocation. In the former case, the acceleration routines are
+ * stepped in to when using the framebuffer console causing the
+ * workqueue to be scheduled without any dirty pages on the list.
+ *
+ * Despite this, a panel update is still needed given that the
+ * acceleration routines have their own methods for writing in
+ * that still need to be updated.
+ *
+ * The fsync() and empty pagelist case could be optimized for,
+ * but we don't bother, as any application exhibiting such
+ * behaviour is fundamentally broken anyways.
+ */
+ if (!list_empty(pagelist)) {
+ unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
- /* trigger panel update */
- lcdc_write_chan(ch, LDSM2R, 1);
-
- dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
+ /* trigger panel update */
+ dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
+ lcdc_write_chan(ch, LDSM2R, 1);
+ dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
+ } else
+ lcdc_write_chan(ch, LDSM2R, 1);
}
static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
From 8820002c18cd3167d2800c002f13d78fa0325402 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 5 Nov 2009 13:56:50 +0900
Subject: [PATCH 095/137] sh: perf events: Fix up uninitialized variable
warning.
'config' can be unintialized, and although it's not really an error, it
still manages to trigger the -Werror with certain toolchains. Initialize
it early to shut up gcc.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/perf_event.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/sh/kernel/perf_event.c b/arch/sh/kernel/perf_event.c
index 4449f0ac9bf8..7ff0943e7a08 100644
--- a/arch/sh/kernel/perf_event.c
+++ b/arch/sh/kernel/perf_event.c
@@ -103,7 +103,7 @@ static int __hw_perf_event_init(struct perf_event *event)
{
struct perf_event_attr *attr = &event->attr;
struct hw_perf_event *hwc = &event->hw;
- int config;
+ int config = -1;
int err;
if (!sh_pmu_initialized())
@@ -155,8 +155,6 @@ static int __hw_perf_event_init(struct perf_event *event)
config = sh_pmu->event_map(attr->config);
break;
- default:
- return -EINVAL;
}
if (config == -1)
From 2de339231b3b7c838542f646e5e699b3f033c43f Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Date: Wed, 4 Nov 2009 10:34:25 +0000
Subject: [PATCH 096/137] sh: sh7724: Add SPU2 support
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4a/setup-sh7724.c | 68 ++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index ac1505a8fd80..9c3cc8f638b6 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -525,6 +525,70 @@ static struct platform_device jpu_device = {
},
};
+/* SPU2DSP0 */
+static struct uio_info spu0_platform_data = {
+ .name = "SPU2DSP0",
+ .version = "0",
+ .irq = 86,
+};
+
+static struct resource spu0_resources[] = {
+ [0] = {
+ .name = "SPU2DSP0",
+ .start = 0xFE200000,
+ .end = 0xFE2FFFFF,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ /* place holder for contiguous memory */
+ },
+};
+
+static struct platform_device spu0_device = {
+ .name = "uio_pdrv_genirq",
+ .id = 4,
+ .dev = {
+ .platform_data = &spu0_platform_data,
+ },
+ .resource = spu0_resources,
+ .num_resources = ARRAY_SIZE(spu0_resources),
+ .archdata = {
+ .hwblk_id = HWBLK_SPU,
+ },
+};
+
+/* SPU2DSP1 */
+static struct uio_info spu1_platform_data = {
+ .name = "SPU2DSP1",
+ .version = "0",
+ .irq = 87,
+};
+
+static struct resource spu1_resources[] = {
+ [0] = {
+ .name = "SPU2DSP1",
+ .start = 0xFE300000,
+ .end = 0xFE3FFFFF,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ /* place holder for contiguous memory */
+ },
+};
+
+static struct platform_device spu1_device = {
+ .name = "uio_pdrv_genirq",
+ .id = 5,
+ .dev = {
+ .platform_data = &spu1_platform_data,
+ },
+ .resource = spu1_resources,
+ .num_resources = ARRAY_SIZE(spu1_resources),
+ .archdata = {
+ .hwblk_id = HWBLK_SPU,
+ },
+};
+
static struct platform_device *sh7724_devices[] __initdata = {
&cmt_device,
&tmu0_device,
@@ -541,6 +605,8 @@ static struct platform_device *sh7724_devices[] __initdata = {
&veu0_device,
&veu1_device,
&jpu_device,
+ &spu0_device,
+ &spu1_device,
};
static int __init sh7724_devices_setup(void)
@@ -549,6 +615,8 @@ static int __init sh7724_devices_setup(void)
platform_resource_setup_memory(&veu0_device, "veu0", 2 << 20);
platform_resource_setup_memory(&veu1_device, "veu1", 2 << 20);
platform_resource_setup_memory(&jpu_device, "jpu", 2 << 20);
+ platform_resource_setup_memory(&spu0_device, "spu0", 2 << 20);
+ platform_resource_setup_memory(&spu1_device, "spu1", 2 << 20);
return platform_add_devices(sh7724_devices,
ARRAY_SIZE(sh7724_devices));
From d1b261ef85bf63383b80b46b7cee525e0a63b3d3 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 5 Nov 2009 14:06:36 +0900
Subject: [PATCH 097/137] sh: Default-enable SPU clock for SH7724.
Wanted by the SPU2 UIO driver, which really ought to be handling this
itself. Default enable it for now, until the driver gets a bit more
intelligent.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4a/clock-sh7724.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7724.c b/arch/sh/kernel/cpu/sh4a/clock-sh7724.c
index dfe9192be63e..9db743802f06 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7724.c
@@ -152,7 +152,7 @@ struct clk div6_clks[] = {
SH_CLK_DIV6("fsia_clk", &div3_clk, FCLKACR, 0),
SH_CLK_DIV6("fsib_clk", &div3_clk, FCLKBCR, 0),
SH_CLK_DIV6("irda_clk", &div3_clk, IRDACLKCR, 0),
- SH_CLK_DIV6("spu_clk", &div3_clk, SPUCLKCR, 0),
+ SH_CLK_DIV6("spu_clk", &div3_clk, SPUCLKCR, CLK_ENABLE_ON_INIT),
};
#define R_CLK (&r_clk)
From 830fafecc211bef5bc6e253ab7e39c9e7560f758 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 5 Nov 2009 16:20:09 +0900
Subject: [PATCH 098/137] sh: perf events: Preliminary callchain support.
This implements preliminary support for perf callchains (at the moment
only the kernel side is implemented). The actual implementation itself is
just a simple wrapper around the unwinder API, which allows for callchain
generation with or without the dwarf unwinder.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/Makefile | 2 +-
arch/sh/kernel/perf_callchain.c | 98 +++++++++++++++++++++++++++++++++
2 files changed, 99 insertions(+), 1 deletion(-)
create mode 100644 arch/sh/kernel/perf_callchain.c
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 0a67bafce425..8edb927a1f30 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -39,7 +39,7 @@ obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
obj-$(CONFIG_DUMP_CODE) += disassemble.o
obj-$(CONFIG_HIBERNATION) += swsusp.o
obj-$(CONFIG_DWARF_UNWINDER) += dwarf.o
-obj-$(CONFIG_PERF_EVENTS) += perf_event.o
+obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_callchain.o
obj-$(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) += localtimer.o
diff --git a/arch/sh/kernel/perf_callchain.c b/arch/sh/kernel/perf_callchain.c
new file mode 100644
index 000000000000..24ea837eac5b
--- /dev/null
+++ b/arch/sh/kernel/perf_callchain.c
@@ -0,0 +1,98 @@
+/*
+ * Performance event callchain support - SuperH architecture code
+ *
+ * Copyright (C) 2009 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/perf_event.h>
+#include <linux/percpu.h>
+#include <asm/unwinder.h>
+#include <asm/ptrace.h>
+
+static inline void callchain_store(struct perf_callchain_entry *entry, u64 ip)
+{
+ if (entry->nr < PERF_MAX_STACK_DEPTH)
+ entry->ip[entry->nr++] = ip;
+}
+
+static void callchain_warning(void *data, char *msg)
+{
+}
+
+static void
+callchain_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+}
+
+static int callchain_stack(void *data, char *name)
+{
+ return 0;
+}
+
+static void callchain_address(void *data, unsigned long addr, int reliable)
+{
+ struct perf_callchain_entry *entry = data;
+
+ if (reliable)
+ callchain_store(entry, addr);
+}
+
+static const struct stacktrace_ops callchain_ops = {
+ .warning = callchain_warning,
+ .warning_symbol = callchain_warning_symbol,
+ .stack = callchain_stack,
+ .address = callchain_address,
+};
+
+static void
+perf_callchain_kernel(struct pt_regs *regs, struct perf_callchain_entry *entry)
+{
+ callchain_store(entry, PERF_CONTEXT_KERNEL);
+ callchain_store(entry, regs->pc);
+
+ unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
+}
+
+static void
+perf_do_callchain(struct pt_regs *regs, struct perf_callchain_entry *entry)
+{
+ int is_user;
+
+ if (!regs)
+ return;
+
+ is_user = user_mode(regs);
+
+ if (!current || current->pid == 0)
+ return;
+
+ if (is_user && current->state != TASK_RUNNING)
+ return;
+
+ /*
+ * Only the kernel side is implemented for now.
+ */
+ if (!is_user)
+ perf_callchain_kernel(regs, entry);
+}
+
+/*
+ * No need for separate IRQ and NMI entries.
+ */
+static DEFINE_PER_CPU(struct perf_callchain_entry, callchain);
+
+struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
+{
+ struct perf_callchain_entry *entry = &__get_cpu_var(callchain);
+
+ entry->nr = 0;
+
+ perf_do_callchain(regs, entry);
+
+ return entry;
+}
From 1d823323f2e92287a07a25570aebf0b2d3864703 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 5 Nov 2009 17:02:03 +0900
Subject: [PATCH 099/137] sh: perf events: Add support for SH7750-style
counters.
This adds perf events support for the SH7750/SH7750S/SH7091 performance
counters.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4/Makefile | 5 +
arch/sh/kernel/cpu/sh4/perf_event.c | 253 ++++++++++++++++++++++++++++
2 files changed, 258 insertions(+)
create mode 100644 arch/sh/kernel/cpu/sh4/perf_event.c
diff --git a/arch/sh/kernel/cpu/sh4/Makefile b/arch/sh/kernel/cpu/sh4/Makefile
index 203b18347b83..c39c1235db91 100644
--- a/arch/sh/kernel/cpu/sh4/Makefile
+++ b/arch/sh/kernel/cpu/sh4/Makefile
@@ -9,6 +9,11 @@ obj-$(CONFIG_HIBERNATION) += $(addprefix ../sh3/, swsusp.o)
obj-$(CONFIG_SH_FPU) += fpu.o softfloat.o
obj-$(CONFIG_SH_STORE_QUEUES) += sq.o
+# Perf events
+obj-$(CONFIG_CPU_SUBTYPE_SH7750) += perf_event.o
+obj-$(CONFIG_CPU_SUBTYPE_SH7750S) += perf_event.o
+obj-$(CONFIG_CPU_SUBTYPE_SH7091) += perf_event.o
+
# CPU subtype setup
obj-$(CONFIG_CPU_SUBTYPE_SH7750) += setup-sh7750.o
obj-$(CONFIG_CPU_SUBTYPE_SH7750R) += setup-sh7750.o
diff --git a/arch/sh/kernel/cpu/sh4/perf_event.c b/arch/sh/kernel/cpu/sh4/perf_event.c
new file mode 100644
index 000000000000..7f9ecc9c2d02
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4/perf_event.c
@@ -0,0 +1,253 @@
+/*
+ * Performance events support for SH7750-style performance counters
+ *
+ * Copyright (C) 2009 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/perf_event.h>
+#include <asm/processor.h>
+
+#define PM_CR_BASE 0xff000084 /* 16-bit */
+#define PM_CTR_BASE 0xff100004 /* 32-bit */
+
+#define PMCR(n) (PM_CR_BASE + ((n) * 0x04))
+#define PMCTRH(n) (PM_CTR_BASE + 0x00 + ((n) * 0x08))
+#define PMCTRL(n) (PM_CTR_BASE + 0x04 + ((n) * 0x08))
+
+#define PMCR_PMM_MASK 0x0000003f
+
+#define PMCR_CLKF 0x00000100
+#define PMCR_PMCLR 0x00002000
+#define PMCR_PMST 0x00004000
+#define PMCR_PMEN 0x00008000
+
+static struct sh_pmu sh7750_pmu;
+
+/*
+ * There are a number of events supported by each counter (33 in total).
+ * Since we have 2 counters, each counter will take the event code as it
+ * corresponds to the PMCR PMM setting. Each counter can be configured
+ * independently.
+ *
+ * Event Code Description
+ * ---------- -----------
+ *
+ * 0x01 Operand read access
+ * 0x02 Operand write access
+ * 0x03 UTLB miss
+ * 0x04 Operand cache read miss
+ * 0x05 Operand cache write miss
+ * 0x06 Instruction fetch (w/ cache)
+ * 0x07 Instruction TLB miss
+ * 0x08 Instruction cache miss
+ * 0x09 All operand accesses
+ * 0x0a All instruction accesses
+ * 0x0b OC RAM operand access
+ * 0x0d On-chip I/O space access
+ * 0x0e Operand access (r/w)
+ * 0x0f Operand cache miss (r/w)
+ * 0x10 Branch instruction
+ * 0x11 Branch taken
+ * 0x12 BSR/BSRF/JSR
+ * 0x13 Instruction execution
+ * 0x14 Instruction execution in parallel
+ * 0x15 FPU Instruction execution
+ * 0x16 Interrupt
+ * 0x17 NMI
+ * 0x18 trapa instruction execution
+ * 0x19 UBCA match
+ * 0x1a UBCB match
+ * 0x21 Instruction cache fill
+ * 0x22 Operand cache fill
+ * 0x23 Elapsed time
+ * 0x24 Pipeline freeze by I-cache miss
+ * 0x25 Pipeline freeze by D-cache miss
+ * 0x27 Pipeline freeze by branch instruction
+ * 0x28 Pipeline freeze by CPU register
+ * 0x29 Pipeline freeze by FPU
+ */
+
+static const int sh7750_general_events[] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = 0x0023,
+ [PERF_COUNT_HW_INSTRUCTIONS] = 0x000a,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0006, /* I-cache */
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x0008, /* I-cache */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x0010,
+ [PERF_COUNT_HW_BRANCH_MISSES] = -1,
+ [PERF_COUNT_HW_BUS_CYCLES] = -1,
+};
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+static const int sh7750_cache_events
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(L1D) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0001,
+ [ C(RESULT_MISS) ] = 0x0004,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0002,
+ [ C(RESULT_MISS) ] = 0x0005,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+
+ [ C(L1I) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0006,
+ [ C(RESULT_MISS) ] = 0x0008,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+
+ [ C(LL) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+
+ [ C(DTLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0x0003,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+
+ [ C(ITLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0x0007,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+
+ [ C(BPU) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+};
+
+static int sh7750_event_map(int event)
+{
+ return sh7750_general_events[event];
+}
+
+static u64 sh7750_pmu_read(int idx)
+{
+ return (u64)((u64)(__raw_readl(PMCTRH(idx)) & 0xffff) << 32) |
+ __raw_readl(PMCTRL(idx));
+}
+
+static void sh7750_pmu_disable(struct hw_perf_event *hwc, int idx)
+{
+ unsigned int tmp;
+
+ tmp = __raw_readw(PMCR(idx));
+ tmp &= ~(PMCR_PMM_MASK | PMCR_PMEN);
+ __raw_writew(tmp, PMCR(idx));
+}
+
+static void sh7750_pmu_enable(struct hw_perf_event *hwc, int idx)
+{
+ __raw_writew(__raw_readw(PMCR(idx)) | PMCR_PMCLR, PMCR(idx));
+ __raw_writew(hwc->config | PMCR_PMEN | PMCR_PMST, PMCR(idx));
+}
+
+static void sh7750_pmu_disable_all(void)
+{
+ int i;
+
+ for (i = 0; i < sh7750_pmu.num_events; i++)
+ __raw_writew(__raw_readw(PMCR(i)) & ~PMCR_PMEN, PMCR(i));
+}
+
+static void sh7750_pmu_enable_all(void)
+{
+ int i;
+
+ for (i = 0; i < sh7750_pmu.num_events; i++)
+ __raw_writew(__raw_readw(PMCR(i)) | PMCR_PMEN, PMCR(i));
+}
+
+static struct sh_pmu sh7750_pmu = {
+ .name = "SH7750",
+ .num_events = 2,
+ .event_map = sh7750_event_map,
+ .max_events = ARRAY_SIZE(sh7750_general_events),
+ .raw_event_mask = PMCR_PMM_MASK,
+ .cache_events = &sh7750_cache_events,
+ .read = sh7750_pmu_read,
+ .disable = sh7750_pmu_disable,
+ .enable = sh7750_pmu_enable,
+ .disable_all = sh7750_pmu_disable_all,
+ .enable_all = sh7750_pmu_enable_all,
+};
+
+static int __init sh7750_pmu_init(void)
+{
+ /*
+ * Make sure this CPU actually has perf counters.
+ */
+ if (!(boot_cpu_data.flags & CPU_HAS_PERF_COUNTER)) {
+ pr_notice("HW perf events unsupported, software events only.\n");
+ return -ENODEV;
+ }
+
+ return register_sh_pmu(&sh7750_pmu);
+}
+arch_initcall(sh7750_pmu_init);
From 093aed1937cc7ae9290ede24ad45f040e097510b Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 5 Nov 2009 17:09:59 +0900
Subject: [PATCH 100/137] sh: oprofile: Kill off bitrotted SH7750 driver.
This kills off the old SH7750 oprofile driver, preferring perf instead.
As this driver has a number of bugs that no one seems to have noticed,
it's safe to kill this off now rather than providing an extended
transition period.
The old oprofile framework is still kept in place for now, primarily to
give out-of-tree drivers a chance to transition off. But this too will be
killed off in short order.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/oprofile/Makefile | 4 -
arch/sh/oprofile/common.c | 38 +----
arch/sh/oprofile/op_model_sh7750.c | 255 -----------------------------
3 files changed, 8 insertions(+), 289 deletions(-)
delete mode 100644 arch/sh/oprofile/op_model_sh7750.c
diff --git a/arch/sh/oprofile/Makefile b/arch/sh/oprofile/Makefile
index 8e6eec91c14c..4886c5c1786c 100644
--- a/arch/sh/oprofile/Makefile
+++ b/arch/sh/oprofile/Makefile
@@ -7,7 +7,3 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
timer_int.o )
oprofile-y := $(DRIVER_OBJS) common.o backtrace.o
-
-oprofile-$(CONFIG_CPU_SUBTYPE_SH7750S) += op_model_sh7750.o
-oprofile-$(CONFIG_CPU_SUBTYPE_SH7750) += op_model_sh7750.o
-oprofile-$(CONFIG_CPU_SUBTYPE_SH7091) += op_model_sh7750.o
diff --git a/arch/sh/oprofile/common.c b/arch/sh/oprofile/common.c
index 44f4e31c6d63..ac604937f3ee 100644
--- a/arch/sh/oprofile/common.c
+++ b/arch/sh/oprofile/common.c
@@ -20,9 +20,6 @@
#include <asm/processor.h>
#include "op_impl.h"
-extern struct op_sh_model op_model_sh7750_ops __weak;
-extern struct op_sh_model op_model_sh4a_ops __weak;
-
static struct op_sh_model *model;
static struct op_counter_config ctr[20];
@@ -94,33 +91,14 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
*/
ops->backtrace = sh_backtrace;
- switch (current_cpu_data.type) {
- /* SH-4 types */
- case CPU_SH7750:
- case CPU_SH7750S:
- lmodel = &op_model_sh7750_ops;
- break;
-
- /* SH-4A types */
- case CPU_SH7763:
- case CPU_SH7770:
- case CPU_SH7780:
- case CPU_SH7781:
- case CPU_SH7785:
- case CPU_SH7786:
- case CPU_SH7723:
- case CPU_SH7724:
- case CPU_SHX3:
- lmodel = &op_model_sh4a_ops;
- break;
-
- /* SH4AL-DSP types */
- case CPU_SH7343:
- case CPU_SH7722:
- case CPU_SH7366:
- lmodel = &op_model_sh4a_ops;
- break;
- }
+ /*
+ * XXX
+ *
+ * All of the SH7750/SH-4A counters have been converted to perf,
+ * this infrastructure hook is left for other users until they've
+ * had a chance to convert over, at which point all of this
+ * will be deleted.
+ */
if (!lmodel)
return -ENODEV;
diff --git a/arch/sh/oprofile/op_model_sh7750.c b/arch/sh/oprofile/op_model_sh7750.c
deleted file mode 100644
index c892c7c30c2f..000000000000
--- a/arch/sh/oprofile/op_model_sh7750.c
+++ /dev/null
@@ -1,255 +0,0 @@
-/*
- * arch/sh/oprofile/op_model_sh7750.c
- *
- * OProfile support for SH7750/SH7750S Performance Counters
- *
- * Copyright (C) 2003 - 2008 Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/kernel.h>
-#include <linux/oprofile.h>
-#include <linux/profile.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/fs.h>
-#include "op_impl.h"
-
-#define PM_CR_BASE 0xff000084 /* 16-bit */
-#define PM_CTR_BASE 0xff100004 /* 32-bit */
-
-#define PMCR(n) (PM_CR_BASE + ((n) * 0x04))
-#define PMCTRH(n) (PM_CTR_BASE + 0x00 + ((n) * 0x08))
-#define PMCTRL(n) (PM_CTR_BASE + 0x04 + ((n) * 0x08))
-
-#define PMCR_PMM_MASK 0x0000003f
-
-#define PMCR_CLKF 0x00000100
-#define PMCR_PMCLR 0x00002000
-#define PMCR_PMST 0x00004000
-#define PMCR_PMEN 0x00008000
-
-struct op_sh_model op_model_sh7750_ops;
-
-#define NR_CNTRS 2
-
-static struct sh7750_ppc_register_config {
- unsigned int ctrl;
- unsigned long cnt_hi;
- unsigned long cnt_lo;
-} regcache[NR_CNTRS];
-
-/*
- * There are a number of events supported by each counter (33 in total).
- * Since we have 2 counters, each counter will take the event code as it
- * corresponds to the PMCR PMM setting. Each counter can be configured
- * independently.
- *
- * Event Code Description
- * ---------- -----------
- *
- * 0x01 Operand read access
- * 0x02 Operand write access
- * 0x03 UTLB miss
- * 0x04 Operand cache read miss
- * 0x05 Operand cache write miss
- * 0x06 Instruction fetch (w/ cache)
- * 0x07 Instruction TLB miss
- * 0x08 Instruction cache miss
- * 0x09 All operand accesses
- * 0x0a All instruction accesses
- * 0x0b OC RAM operand access
- * 0x0d On-chip I/O space access
- * 0x0e Operand access (r/w)
- * 0x0f Operand cache miss (r/w)
- * 0x10 Branch instruction
- * 0x11 Branch taken
- * 0x12 BSR/BSRF/JSR
- * 0x13 Instruction execution
- * 0x14 Instruction execution in parallel
- * 0x15 FPU Instruction execution
- * 0x16 Interrupt
- * 0x17 NMI
- * 0x18 trapa instruction execution
- * 0x19 UBCA match
- * 0x1a UBCB match
- * 0x21 Instruction cache fill
- * 0x22 Operand cache fill
- * 0x23 Elapsed time
- * 0x24 Pipeline freeze by I-cache miss
- * 0x25 Pipeline freeze by D-cache miss
- * 0x27 Pipeline freeze by branch instruction
- * 0x28 Pipeline freeze by CPU register
- * 0x29 Pipeline freeze by FPU
- *
- * Unfortunately we don't have a native exception or interrupt for counter
- * overflow (although since these counters can run for 16.3 days without
- * overflowing, it's not really necessary).
- *
- * OProfile on the other hand likes to have samples taken periodically, so
- * for now we just piggyback the timer interrupt to get the expected
- * behavior.
- */
-
-static int sh7750_timer_notify(struct pt_regs *regs)
-{
- oprofile_add_sample(regs, 0);
- return 0;
-}
-
-static u64 sh7750_read_counter(int counter)
-{
- return (u64)((u64)(__raw_readl(PMCTRH(counter)) & 0xffff) << 32) |
- __raw_readl(PMCTRL(counter));
-}
-
-/*
- * Files will be in a path like:
- *
- * /<oprofilefs mount point>/<counter number>/<file>
- *
- * So when dealing with <file>, we look to the parent dentry for the counter
- * number.
- */
-static inline int to_counter(struct file *file)
-{
- const unsigned char *name = file->f_path.dentry->d_parent->d_name.name;
-
- return (int)simple_strtol(name, NULL, 10);
-}
-
-/*
- * XXX: We have 48-bit counters, so we're probably going to want something
- * more along the lines of oprofilefs_ullong_to_user().. Truncating to
- * unsigned long works fine for now though, as long as we don't attempt to
- * profile for too horribly long.
- */
-static ssize_t sh7750_read_count(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- int counter = to_counter(file);
- u64 val = sh7750_read_counter(counter);
-
- return oprofilefs_ulong_to_user((unsigned long)val, buf, count, ppos);
-}
-
-static ssize_t sh7750_write_count(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- int counter = to_counter(file);
- unsigned long val;
-
- if (oprofilefs_ulong_from_user(&val, buf, count))
- return -EFAULT;
-
- /*
- * Any write will clear the counter, although only 0 should be
- * written for this purpose, as we do not support setting the
- * counter to an arbitrary value.
- */
- WARN_ON(val != 0);
-
- __raw_writew(__raw_readw(PMCR(counter)) | PMCR_PMCLR, PMCR(counter));
-
- return count;
-}
-
-static const struct file_operations count_fops = {
- .read = sh7750_read_count,
- .write = sh7750_write_count,
-};
-
-static int sh7750_ppc_create_files(struct super_block *sb, struct dentry *dir)
-{
- return oprofilefs_create_file(sb, dir, "count", &count_fops);
-}
-
-static void sh7750_ppc_reg_setup(struct op_counter_config *ctr)
-{
- unsigned int counters = op_model_sh7750_ops.num_counters;
- int i;
-
- for (i = 0; i < counters; i++) {
- regcache[i].ctrl = 0;
- regcache[i].cnt_hi = 0;
- regcache[i].cnt_lo = 0;
-
- if (!ctr[i].enabled)
- continue;
-
- regcache[i].ctrl |= ctr[i].event | PMCR_PMEN | PMCR_PMST;
- regcache[i].cnt_hi = (unsigned long)((ctr->count >> 32) & 0xffff);
- regcache[i].cnt_lo = (unsigned long)(ctr->count & 0xffffffff);
- }
-}
-
-static void sh7750_ppc_cpu_setup(void *args)
-{
- unsigned int counters = op_model_sh7750_ops.num_counters;
- int i;
-
- for (i = 0; i < counters; i++) {
- __raw_writew(0, PMCR(i));
- __raw_writel(regcache[i].cnt_hi, PMCTRH(i));
- __raw_writel(regcache[i].cnt_lo, PMCTRL(i));
- }
-}
-
-static void sh7750_ppc_cpu_start(void *args)
-{
- unsigned int counters = op_model_sh7750_ops.num_counters;
- int i;
-
- for (i = 0; i < counters; i++)
- __raw_writew(regcache[i].ctrl, PMCR(i));
-}
-
-static void sh7750_ppc_cpu_stop(void *args)
-{
- unsigned int counters = op_model_sh7750_ops.num_counters;
- int i;
-
- /* Disable the counters */
- for (i = 0; i < counters; i++)
- __raw_writew(__raw_readw(PMCR(i)) & ~PMCR_PMEN, PMCR(i));
-}
-
-static inline void sh7750_ppc_reset(void)
-{
- unsigned int counters = op_model_sh7750_ops.num_counters;
- int i;
-
- /* Clear the counters */
- for (i = 0; i < counters; i++)
- __raw_writew(__raw_readw(PMCR(i)) | PMCR_PMCLR, PMCR(i));
-}
-
-static int sh7750_ppc_init(void)
-{
- sh7750_ppc_reset();
-
- return register_timer_hook(sh7750_timer_notify);
-}
-
-static void sh7750_ppc_exit(void)
-{
- unregister_timer_hook(sh7750_timer_notify);
-
- sh7750_ppc_reset();
-}
-
-struct op_sh_model op_model_sh7750_ops = {
- .cpu_type = "sh/sh7750",
- .num_counters = NR_CNTRS,
- .reg_setup = sh7750_ppc_reg_setup,
- .cpu_setup = sh7750_ppc_cpu_setup,
- .cpu_start = sh7750_ppc_cpu_start,
- .cpu_stop = sh7750_ppc_cpu_stop,
- .init = sh7750_ppc_init,
- .exit = sh7750_ppc_exit,
- .create_files = sh7750_ppc_create_files,
-};
From e9c4148fd4f03008ecbe3b673e25764232a15503 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 5 Nov 2009 17:13:15 +0900
Subject: [PATCH 101/137] sh: oprofile: Fix up count size mismatch for common
impl.
This reduces the 'count' size in the common support structure to 32-bits
so that it matches up with what oprofile is expecting. The SH7750 code
was using a nasty oprofilefs hack to expose the 48-bit counter, although
no other implementations were. Now that the offending driver has been
killed off, it's possible to restore some semblance of sanity.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/oprofile/op_impl.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sh/oprofile/op_impl.h b/arch/sh/oprofile/op_impl.h
index 4d509975eba6..1244479ceb29 100644
--- a/arch/sh/oprofile/op_impl.h
+++ b/arch/sh/oprofile/op_impl.h
@@ -6,7 +6,7 @@ struct op_counter_config {
unsigned long enabled;
unsigned long event;
- unsigned long long count;
+ unsigned long count;
/* Dummy values for userspace tool compliance */
unsigned long kernel;
From 0fe69d773f35fd95938ea02a91ec2d026045398b Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 9 Nov 2009 14:11:07 +0900
Subject: [PATCH 102/137] sh: perf events: Document SH-4A raw event codes.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4a/perf_event.c | 38 ++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/arch/sh/kernel/cpu/sh4a/perf_event.c b/arch/sh/kernel/cpu/sh4a/perf_event.c
index d0938345799f..eddc21973fa1 100644
--- a/arch/sh/kernel/cpu/sh4a/perf_event.c
+++ b/arch/sh/kernel/cpu/sh4a/perf_event.c
@@ -37,6 +37,44 @@
static struct sh_pmu sh4a_pmu;
+/*
+ * Supported raw event codes:
+ *
+ * Event Code Description
+ * ---------- -----------
+ *
+ * 0x0000 number of elapsed cycles
+ * 0x0200 number of elapsed cycles in privileged mode
+ * 0x0280 number of elapsed cycles while SR.BL is asserted
+ * 0x0202 instruction execution
+ * 0x0203 instruction execution in parallel
+ * 0x0204 number of unconditional branches
+ * 0x0208 number of exceptions
+ * 0x0209 number of interrupts
+ * 0x0220 UTLB miss caused by instruction fetch
+ * 0x0222 UTLB miss caused by operand access
+ * 0x02a0 number of ITLB misses
+ * 0x0028 number of accesses to instruction memories
+ * 0x0029 number of accesses to instruction cache
+ * 0x002a instruction cache miss
+ * 0x022e number of access to instruction X/Y memory
+ * 0x0030 number of reads to operand memories
+ * 0x0038 number of writes to operand memories
+ * 0x0031 number of operand cache read accesses
+ * 0x0039 number of operand cache write accesses
+ * 0x0032 operand cache read miss
+ * 0x003a operand cache write miss
+ * 0x0236 number of reads to operand X/Y memory
+ * 0x023e number of writes to operand X/Y memory
+ * 0x0237 number of reads to operand U memory
+ * 0x023f number of writes to operand U memory
+ * 0x0337 number of U memory read buffer misses
+ * 0x02b4 number of wait cycles due to operand read access
+ * 0x02bc number of wait cycles due to operand write access
+ * 0x0033 number of wait cycles due to operand cache read miss
+ * 0x003b number of wait cycles due to operand cache write miss
+ */
+
/*
* Special reserved bits used by hardware emulators, read values will
* vary, but writes must always be 0.
From a4d9d0b8a8d2a81b3189bd99482aab967ce86120 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 11 Nov 2009 10:56:13 +0900
Subject: [PATCH 103/137] sh: Enable PMB support for all SH-4A CPUs.
Presently the PMB options were limited to a number of CPUs they were
tested with, but it is generally available on all SH-4A CPUs, so just
drop the subtype conditionals.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/Kconfig | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index a5e0867d8ae9..0e7ba8e891cf 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -82,7 +82,7 @@ config 32BIT
config PMB_ENABLE
bool "Support 32-bit physical addressing through PMB"
- depends on MMU && EXPERIMENTAL && (CPU_SUBTYPE_SH7757 || CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785)
+ depends on MMU && EXPERIMENTAL && CPU_SH4A
default y
help
If you say Y here, physical addressing will be extended to
@@ -96,7 +96,7 @@ choice
config PMB
bool "PMB"
- depends on MMU && EXPERIMENTAL && (CPU_SUBTYPE_SH7757 || CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785)
+ depends on MMU && EXPERIMENTAL && CPU_SH4A
help
If you say Y here, physical addressing will be extended to
32-bits through the SH-4A PMB. If this is not set, legacy
@@ -104,9 +104,7 @@ config PMB
config PMB_FIXED
bool "fixed PMB"
- depends on MMU && EXPERIMENTAL && (CPU_SUBTYPE_SH7757 || \
- CPU_SUBTYPE_SH7780 || \
- CPU_SUBTYPE_SH7785)
+ depends on MMU && EXPERIMENTAL && CPU_SH4A
select 32BIT
help
If this option is enabled, fixed PMB mappings are inherited
From c4e708dc52b0e68d81a322ad11b280374685956e Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 12 Nov 2009 16:20:36 +0900
Subject: [PATCH 104/137] sh: Fix up the CONFIG_PERF_EVENTS=n build for SH-4.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4/Makefile | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/arch/sh/kernel/cpu/sh4/Makefile b/arch/sh/kernel/cpu/sh4/Makefile
index c39c1235db91..3a1dbc709831 100644
--- a/arch/sh/kernel/cpu/sh4/Makefile
+++ b/arch/sh/kernel/cpu/sh4/Makefile
@@ -10,9 +10,9 @@ obj-$(CONFIG_SH_FPU) += fpu.o softfloat.o
obj-$(CONFIG_SH_STORE_QUEUES) += sq.o
# Perf events
-obj-$(CONFIG_CPU_SUBTYPE_SH7750) += perf_event.o
-obj-$(CONFIG_CPU_SUBTYPE_SH7750S) += perf_event.o
-obj-$(CONFIG_CPU_SUBTYPE_SH7091) += perf_event.o
+perf-$(CONFIG_CPU_SUBTYPE_SH7750) := perf_event.o
+perf-$(CONFIG_CPU_SUBTYPE_SH7750S) := perf_event.o
+perf-$(CONFIG_CPU_SUBTYPE_SH7091) := perf_event.o
# CPU subtype setup
obj-$(CONFIG_CPU_SUBTYPE_SH7750) += setup-sh7750.o
@@ -32,4 +32,5 @@ endif
# Additional clocks by subtype
clock-$(CONFIG_CPU_SUBTYPE_SH4_202) += clock-sh4-202.o
-obj-y += $(clock-y)
+obj-y += $(clock-y)
+obj-$(CONFIG_PERF_EVENTS) += $(perf-y)
From e9c58fc57b17bfa75c256fb4f45ce22de6626858 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 12 Nov 2009 16:36:26 +0900
Subject: [PATCH 105/137] sh: Use the generic I/O port base for slowdown.
This fixes up the build and behaviour for various configurations. Namely
the CONFIG_32BIT cases where legacy mappings do not exist, as well as the
sh64 build.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/io.h | 12 +++---------
arch/sh/kernel/io_generic.c | 4 +++-
arch/sh/kernel/machvec.c | 4 ++++
3 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index 0cf2a5708e26..512cd3e9d0ca 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -90,15 +90,11 @@
#define ctrl_outl __raw_writel
#define ctrl_outq __raw_writeq
+extern unsigned long generic_io_base;
+
static inline void ctrl_delay(void)
{
-#ifdef CONFIG_CPU_SH4
- __raw_readw(CCN_PVR);
-#elif defined(P2SEG)
- __raw_readw(P2SEG);
-#else
-#error "Need a dummy address for delay"
-#endif
+ __raw_readw(generic_io_base);
}
#define __BUILD_MEMORY_STRING(bwlq, type) \
@@ -186,8 +182,6 @@ __BUILD_MEMORY_STRING(q, u64)
#define IO_SPACE_LIMIT 0xffffffff
-extern unsigned long generic_io_base;
-
/*
* This function provides a method for the generic case where a
* board-specific ioport_map simply needs to return the port + some
diff --git a/arch/sh/kernel/io_generic.c b/arch/sh/kernel/io_generic.c
index b8fa6524760a..e1e1dbd19557 100644
--- a/arch/sh/kernel/io_generic.c
+++ b/arch/sh/kernel/io_generic.c
@@ -24,7 +24,7 @@
#define dummy_read()
#endif
-unsigned long generic_io_base;
+unsigned long generic_io_base = 0;
u8 generic_inb(unsigned long port)
{
@@ -147,8 +147,10 @@ void generic_outsl(unsigned long port, const void *src, unsigned long count)
void __iomem *generic_ioport_map(unsigned long addr, unsigned int size)
{
+#ifdef P1SEG
if (PXSEG(addr) >= P1SEG)
return (void __iomem *)addr;
+#endif
return (void __iomem *)(addr + generic_io_base);
}
diff --git a/arch/sh/kernel/machvec.c b/arch/sh/kernel/machvec.c
index cbce639b108a..1652340ba3f2 100644
--- a/arch/sh/kernel/machvec.c
+++ b/arch/sh/kernel/machvec.c
@@ -135,5 +135,9 @@ void __init sh_mv_setup(void)
if (!sh_mv.mv_nr_irqs)
sh_mv.mv_nr_irqs = NR_IRQS;
+#ifdef P2SEG
__set_io_port_base(P2SEG);
+#else
+ __set_io_port_base(0);
+#endif
}
From 626ac8e1388ac128495a3b7188e9d86464de6c5b Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 12 Nov 2009 16:39:47 +0900
Subject: [PATCH 106/137] sh64: Fix up the CONFIG_GENERIC_BUG=n build.
sh64 doesn't use GENERIC_BUG, which presently causes the handle_BUG()
code to blow up. Fix up the dependencies and get it all building again.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/system.h | 4 ----
arch/sh/kernel/traps.c | 6 +++---
2 files changed, 3 insertions(+), 7 deletions(-)
diff --git a/arch/sh/include/asm/system.h b/arch/sh/include/asm/system.h
index b5c5acdc8c0e..c15415b4b169 100644
--- a/arch/sh/include/asm/system.h
+++ b/arch/sh/include/asm/system.h
@@ -171,10 +171,6 @@ BUILD_TRAP_HANDLER(fpu_error);
BUILD_TRAP_HANDLER(fpu_state_restore);
BUILD_TRAP_HANDLER(nmi);
-#ifdef CONFIG_BUG
-extern void handle_BUG(struct pt_regs *);
-#endif
-
#define arch_align_stack(x) (x)
struct mem_access {
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index d52695df2702..7b036339dc92 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -9,8 +9,8 @@
#include <asm/unwinder.h>
#include <asm/system.h>
-#ifdef CONFIG_BUG
-void handle_BUG(struct pt_regs *regs)
+#ifdef CONFIG_GENERIC_BUG
+static void handle_BUG(struct pt_regs *regs)
{
const struct bug_entry *bug;
unsigned long bugaddr = regs->pc;
@@ -81,7 +81,7 @@ BUILD_TRAP_HANDLER(bug)
SIGTRAP) == NOTIFY_STOP)
return;
-#ifdef CONFIG_BUG
+#ifdef CONFIG_GENERIC_BUG
if (__kernel_text_address(instruction_pointer(regs))) {
insn_size_t insn = *(insn_size_t *)instruction_pointer(regs);
if (insn == TRAPA_BUG_OPCODE)
From 3af539e59cf3213cbe31ce7008f1db51c52665ca Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 12 Nov 2009 17:03:28 +0900
Subject: [PATCH 107/137] sh64: Fix up reworked cache op build.
This gets the build fixed up for the sh64 cache enabled case.
Disabling still needs further abstraction for independent I/D-cache
disabling.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/cache-sh5.c | 2 +-
arch/sh/mm/cache.c | 6 +++++-
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/sh/mm/cache-sh5.c b/arch/sh/mm/cache-sh5.c
index 467ff8e260f7..eb4cc4ec7952 100644
--- a/arch/sh/mm/cache-sh5.c
+++ b/arch/sh/mm/cache-sh5.c
@@ -563,7 +563,7 @@ static void sh5_flush_cache_page(void *args)
static void sh5_flush_dcache_page(void *page)
{
- sh64_dcache_purge_phy_page(page_to_phys(page));
+ sh64_dcache_purge_phy_page(page_to_phys((struct page *)page));
wmb();
}
diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c
index 63c132998f24..e9415d3ea94a 100644
--- a/arch/sh/mm/cache.c
+++ b/arch/sh/mm/cache.c
@@ -277,7 +277,11 @@ static void __init emit_cache_params(void)
void __init cpu_cache_init(void)
{
- unsigned int cache_disabled = !(__raw_readl(CCR) & CCR_CACHE_ENABLE);
+ unsigned int cache_disabled = 0;
+
+#ifdef CCR
+ cache_disabled = !(__raw_readl(CCR) & CCR_CACHE_ENABLE);
+#endif
compute_alias(&boot_cpu_data.icache);
compute_alias(&boot_cpu_data.dcache);
From 1dca899e95d27475c9036ce1cf857a72852b9c53 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 13 Nov 2009 12:29:19 +0900
Subject: [PATCH 108/137] sh: dma: Kill off bogus dma_sysclass symbol export.
This is a static symbol, so the export is wholly superfluous. Recent
kbuild updates flagged this as an error, resulting in build failure,
so this tidies that up.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/drivers/dma/dma-sysfs.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/sh/drivers/dma/dma-sysfs.c b/arch/sh/drivers/dma/dma-sysfs.c
index 347ee11351ec..1ee631d3725e 100644
--- a/arch/sh/drivers/dma/dma-sysfs.c
+++ b/arch/sh/drivers/dma/dma-sysfs.c
@@ -13,7 +13,6 @@
#include <linux/init.h>
#include <linux/sysdev.h>
#include <linux/platform_device.h>
-#include <linux/module.h>
#include <linux/err.h>
#include <linux/string.h>
#include <asm/dma.h>
@@ -21,7 +20,6 @@
static struct sysdev_class dma_sysclass = {
.name = "dma",
};
-EXPORT_SYMBOL(dma_sysclass);
static ssize_t dma_show_devices(struct sys_device *dev,
struct sysdev_attribute *attr, char *buf)
From a0458b07c17a10ea316e6ae65ab15b78bf5f44ee Mon Sep 17 00:00:00 2001
From: Giuseppe CAVALLARO <peppe.cavallaro@st.com>
Date: Tue, 7 Jul 2009 16:25:10 +0200
Subject: [PATCH 109/137] sh: add sleazy FPU optimization
sh port of the sLeAZY-fpu feature currently implemented for some architectures
such us i386.
Right now the SH kernel has a 100% lazy fpu behaviour.
This is of course great for applications that have very sporadic or no FPU use.
However for very frequent FPU users... you take an extra trap every context
switch.
The patch below adds a simple heuristic to this code: after 5 consecutive
context switches of FPU use, the lazy behavior is disabled and the context
gets restored every context switch.
After 256 switches, this is reset and the 100% lazy behavior is returned.
Tests with LMbench showed no regression.
I saw a little improvement due to the prefetching (~2%).
The tests below also show that, with this sLeazy patch, indeed,
the number of FPU exceptions is reduced.
To test this. I hacked the lat_ctx LMBench to use the FPU a little more.
sLeasy implementation
===========================================
switch_to calls | 79326
sleasy calls | 42577
do_fpu_state_restore calls| 59232
restore_fpu calls | 59032
Exceptions: 0x800 (FPU disabled ): 16604
100% Leazy (default implementation)
===========================================
switch_to calls | 79690
do_fpu_state_restore calls | 53299
restore_fpu calls | 53101
Exceptions: 0x800 (FPU disabled ): 53273
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/fpu.h | 3 +++
arch/sh/kernel/cpu/sh4/fpu.c | 16 ++++++++++++----
arch/sh/kernel/process_32.c | 16 ++++++++++++++++
3 files changed, 31 insertions(+), 4 deletions(-)
diff --git a/arch/sh/include/asm/fpu.h b/arch/sh/include/asm/fpu.h
index 1d3aee04b5cc..bfd78e19de1b 100644
--- a/arch/sh/include/asm/fpu.h
+++ b/arch/sh/include/asm/fpu.h
@@ -19,6 +19,7 @@ static inline void grab_fpu(struct pt_regs *regs)
struct task_struct;
extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
+void fpu_state_restore(struct pt_regs *regs);
#else
#define release_fpu(regs) do { } while (0)
@@ -44,6 +45,8 @@ static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
preempt_disable();
if (test_tsk_thread_flag(tsk, TIF_USEDFPU))
save_fpu(tsk, regs);
+ else
+ tsk->fpu_counter = 0;
preempt_enable();
}
diff --git a/arch/sh/kernel/cpu/sh4/fpu.c b/arch/sh/kernel/cpu/sh4/fpu.c
index e3ea5411da6d..d79226fa59d1 100644
--- a/arch/sh/kernel/cpu/sh4/fpu.c
+++ b/arch/sh/kernel/cpu/sh4/fpu.c
@@ -483,18 +483,18 @@ BUILD_TRAP_HANDLER(fpu_error)
force_sig(SIGFPE, tsk);
}
-BUILD_TRAP_HANDLER(fpu_state_restore)
+void fpu_state_restore(struct pt_regs *regs)
{
struct task_struct *tsk = current;
- TRAP_HANDLER_DECL;
grab_fpu(regs);
- if (!user_mode(regs)) {
+ if (unlikely(!user_mode(regs))) {
printk(KERN_ERR "BUG: FPU is used in kernel mode.\n");
+ BUG();
return;
}
- if (used_math()) {
+ if (likely(used_math())) {
/* Using the FPU again. */
restore_fpu(tsk);
} else {
@@ -503,4 +503,12 @@ BUILD_TRAP_HANDLER(fpu_state_restore)
set_used_math();
}
set_tsk_thread_flag(tsk, TIF_USEDFPU);
+ tsk->fpu_counter++;
+}
+
+BUILD_TRAP_HANDLER(fpu_state_restore)
+{
+ TRAP_HANDLER_DECL;
+
+ fpu_state_restore(regs);
}
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index 0673c4746be3..aff5fe02e393 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -288,8 +288,14 @@ static void ubc_set_tracing(int asid, unsigned long pc)
__notrace_funcgraph struct task_struct *
__switch_to(struct task_struct *prev, struct task_struct *next)
{
+ struct thread_struct *next_t = &next->thread;
+
#if defined(CONFIG_SH_FPU)
unlazy_fpu(prev, task_pt_regs(prev));
+
+ /* we're going to use this soon, after a few expensive things */
+ if (next->fpu_counter > 5)
+ prefetch(&next_t->fpu.hard);
#endif
#ifdef CONFIG_MMU
@@ -321,6 +327,16 @@ __switch_to(struct task_struct *prev, struct task_struct *next)
#endif
}
+#if defined(CONFIG_SH_FPU)
+ /* If the task has used fpu the last 5 timeslices, just do a full
+ * restore of the math state immediately to avoid the trap; the
+ * chances of needing FPU soon are obviously high now
+ */
+ if (next->fpu_counter > 5) {
+ fpu_state_restore(task_pt_regs(next));
+ }
+#endif
+
return prev;
}
From dfc349402de8e95f6a42e8341e9ea193b718eee3 Mon Sep 17 00:00:00 2001
From: Stuart Menefy <stuart.menefy@st.com>
Date: Tue, 27 Oct 2009 15:14:06 +0000
Subject: [PATCH 110/137] sh: Optimised memset for SH4
Optimised version of memset for the SH4 which uses movca.l.
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/lib/Makefile | 7 ++-
arch/sh/lib/memset-sh4.S | 107 +++++++++++++++++++++++++++++++++++++++
2 files changed, 112 insertions(+), 2 deletions(-)
create mode 100644 arch/sh/lib/memset-sh4.S
diff --git a/arch/sh/lib/Makefile b/arch/sh/lib/Makefile
index a969b47c5463..dab4d2129812 100644
--- a/arch/sh/lib/Makefile
+++ b/arch/sh/lib/Makefile
@@ -2,7 +2,7 @@
# Makefile for SuperH-specific library files..
#
-lib-y = delay.o memset.o memmove.o memchr.o \
+lib-y = delay.o memmove.o memchr.o \
checksum.o strlen.o div64.o div64-generic.o
# Extracted from libgcc
@@ -23,8 +23,11 @@ obj-y += io.o
memcpy-y := memcpy.o
memcpy-$(CONFIG_CPU_SH4) := memcpy-sh4.o
+memset-y := memset.o
+memset-$(CONFIG_CPU_SH4) := memset-sh4.o
+
lib-$(CONFIG_MMU) += copy_page.o __clear_user.o
lib-$(CONFIG_MCOUNT) += mcount.o
-lib-y += $(memcpy-y) $(udivsi3-y)
+lib-y += $(memcpy-y) $(memset-y) $(udivsi3-y)
EXTRA_CFLAGS += -Werror
diff --git a/arch/sh/lib/memset-sh4.S b/arch/sh/lib/memset-sh4.S
new file mode 100644
index 000000000000..1a6e32cc4e4d
--- /dev/null
+++ b/arch/sh/lib/memset-sh4.S
@@ -0,0 +1,107 @@
+/*
+ * "memset" implementation for SH4
+ *
+ * Copyright (C) 1999 Niibe Yutaka
+ * Copyright (c) 2009 STMicroelectronics Limited
+ * Author: Stuart Menefy <stuart.menefy:st.com>
+ */
+
+/*
+ * void *memset(void *s, int c, size_t n);
+ */
+
+#include <linux/linkage.h>
+
+ENTRY(memset)
+ mov #12,r0
+ add r6,r4
+ cmp/gt r6,r0
+ bt/s 40f ! if it's too small, set a byte at once
+ mov r4,r0
+ and #3,r0
+ cmp/eq #0,r0
+ bt/s 2f ! It's aligned
+ sub r0,r6
+1:
+ dt r0
+ bf/s 1b
+ mov.b r5,@-r4
+2: ! make VVVV
+ extu.b r5,r5
+ swap.b r5,r0 ! V0
+ or r0,r5 ! VV
+ swap.w r5,r0 ! VV00
+ or r0,r5 ! VVVV
+
+ ! Check if enough bytes need to be copied to be worth the big loop
+ mov #0x40, r0 ! (MT)
+ cmp/gt r6,r0 ! (MT) 64 > len => slow loop
+
+ bt/s 22f
+ mov r6,r0
+
+ ! align the dst to the cache block size if necessary
+ mov r4, r3
+ mov #~(0x1f), r1
+
+ and r3, r1
+ cmp/eq r3, r1
+
+ bt/s 11f ! dst is already aligned
+ sub r1, r3 ! r3-r1 -> r3
+ shlr2 r3 ! number of loops
+
+10: mov.l r5,@-r4
+ dt r3
+ bf/s 10b
+ add #-4, r6
+
+11: ! dst is 32byte aligned
+ mov r6,r2
+ mov #-5,r0
+ shld r0,r2 ! number of loops
+
+ add #-32, r4
+ mov r5, r0
+12:
+ movca.l r0,@r4
+ mov.l r5,@(4, r4)
+ mov.l r5,@(8, r4)
+ mov.l r5,@(12,r4)
+ mov.l r5,@(16,r4)
+ mov.l r5,@(20,r4)
+ add #-0x20, r6
+ mov.l r5,@(24,r4)
+ dt r2
+ mov.l r5,@(28,r4)
+ bf/s 12b
+ add #-32, r4
+
+ add #32, r4
+ mov #8, r0
+ cmp/ge r0, r6
+ bf 40f
+
+ mov r6,r0
+22:
+ shlr2 r0
+ shlr r0 ! r0 = r6 >> 3
+3:
+ dt r0
+ mov.l r5,@-r4 ! set 8-byte at once
+ bf/s 3b
+ mov.l r5,@-r4
+ !
+ mov #7,r0
+ and r0,r6
+
+ ! fill bytes (length may be zero)
+40: tst r6,r6
+ bt 5f
+4:
+ dt r6
+ bf/s 4b
+ mov.b r5,@-r4
+5:
+ rts
+ mov r4,r0
From 39ac11c1607f1d566e7cf885acd403fa4f07f8a2 Mon Sep 17 00:00:00 2001
From: Stuart Menefy <stuart.menefy@st.com>
Date: Tue, 27 Oct 2009 15:14:06 +0000
Subject: [PATCH 111/137] sh: Improve performance of SH4 versions of
copy/clear_user_highpage
The previous implementation of clear_user_highpage and copy_user_highpage
checked to see if there was a D-cache aliasing issue between the user
and kernel mappings of a page, but if there was they always did a
flush with writeback on the dirtied kernel alias.
However as we now have the ability to map a page into kernel space
with the same cache colour as the user mapping, there is no need to
write back this data.
Currently we also invalidate the kernel alias as a precaution, however
I'm not sure if this is actually required.
Also correct the definition of FIX_CMAP_END so that the mappings created
by kmap_coherent() are actually at the correct colour.
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/fixmap.h | 8 ++++-
arch/sh/mm/cache.c | 66 +++++++++++++++++++++++++++++-------
2 files changed, 60 insertions(+), 14 deletions(-)
diff --git a/arch/sh/include/asm/fixmap.h b/arch/sh/include/asm/fixmap.h
index 76c5a3099cb8..5ac1e40a511c 100644
--- a/arch/sh/include/asm/fixmap.h
+++ b/arch/sh/include/asm/fixmap.h
@@ -46,9 +46,15 @@
* fix-mapped?
*/
enum fixed_addresses {
+ /*
+ * The FIX_CMAP entries are used by kmap_coherent() to get virtual
+ * addresses which are of a known color, and so their values are
+ * important. __fix_to_virt(FIX_CMAP_END - n) must give an address
+ * which is the same color as a page (n<<PAGE_SHIFT).
+ */
#define FIX_N_COLOURS 8
FIX_CMAP_BEGIN,
- FIX_CMAP_END = FIX_CMAP_BEGIN + (FIX_N_COLOURS * NR_CPUS),
+ FIX_CMAP_END = FIX_CMAP_BEGIN + (FIX_N_COLOURS * NR_CPUS) - 1,
FIX_UNCACHED,
#ifdef CONFIG_HIGHMEM
FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c
index e9415d3ea94a..997c7e42b1e1 100644
--- a/arch/sh/mm/cache.c
+++ b/arch/sh/mm/cache.c
@@ -46,6 +46,18 @@ static inline void cacheop_on_each_cpu(void (*func) (void *info), void *info,
preempt_enable();
}
+/*
+ * copy_to_user_page
+ * @vma: vm_area_struct holding the pages
+ * @page: struct page
+ * @vaddr: user space address
+ * @dst: address of page in kernel space (possibly from kmap)
+ * @src: source address in kernel logical memory
+ * @len: length of data in bytes (may be less than PAGE_SIZE)
+ *
+ * Copy data into the address space of a process other than the current
+ * process (eg for ptrace).
+ */
void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long vaddr, void *dst, const void *src,
unsigned long len)
@@ -81,28 +93,49 @@ void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
}
}
+/*
+ * copy_user_highpage
+ * @to: destination page
+ * @from: source page
+ * @vaddr: address of pages in user address space
+ * @vma: vm_area_struct holding the pages
+ *
+ * This is used in COW implementation to copy data from page @from to
+ * page @to. @from was previousl mapped at @vaddr, and @to will be.
+ * As this is used only in the COW implementation, this means that the
+ * source is unmodified, and so we don't have to worry about cache
+ * aliasing on that side.
+ */
+#ifdef CONFIG_HIGHMEM
+/*
+ * If we ever have a real highmem system, this code will need fixing
+ * (as will clear_user/clear_user_highmem), because the kmap potentitally
+ * creates another alias risk.
+ */
+#error This code is broken with real HIGHMEM
+#endif
void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma)
{
void *vfrom, *vto;
vto = kmap_atomic(to, KM_USER1);
+ vfrom = kmap_atomic(from, KM_USER0);
+
+ if (pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
+ __flush_invalidate_region(vto, PAGE_SIZE);
if (boot_cpu_data.dcache.n_aliases && page_mapped(from) &&
!test_bit(PG_dcache_dirty, &from->flags)) {
- vfrom = kmap_coherent(from, vaddr);
+ void *vto_coloured = kmap_coherent(to, vaddr);
+ copy_page(vto_coloured, vfrom);
+ kunmap_coherent(vto_coloured);
+ } else
copy_page(vto, vfrom);
- kunmap_coherent(vfrom);
- } else {
- vfrom = kmap_atomic(from, KM_USER0);
- copy_page(vto, vfrom);
- kunmap_atomic(vfrom, KM_USER0);
- }
-
- if (pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
- __flush_purge_region(vto, PAGE_SIZE);
+ kunmap_atomic(vfrom, KM_USER0);
kunmap_atomic(vto, KM_USER1);
+
/* Make sure this page is cleared on other CPU's too before using it */
smp_wmb();
}
@@ -112,10 +145,17 @@ void clear_user_highpage(struct page *page, unsigned long vaddr)
{
void *kaddr = kmap_atomic(page, KM_USER0);
- clear_page(kaddr);
+ if (pages_do_alias((unsigned long)kaddr, vaddr & PAGE_MASK)) {
+ void *vto;
- if (pages_do_alias((unsigned long)kaddr, vaddr & PAGE_MASK))
- __flush_purge_region(kaddr, PAGE_SIZE);
+ /* Kernel alias may have modified data in the cache. */
+ __flush_invalidate_region(kaddr, PAGE_SIZE);
+
+ vto = kmap_coherent(page, vaddr);
+ clear_page(vto);
+ kunmap_coherent(vto);
+ } else
+ clear_page(kaddr);
kunmap_atomic(kaddr, KM_USER0);
}
From d3ea9fa0a563620fe9f416f94bb8927c64390917 Mon Sep 17 00:00:00 2001
From: Stuart Menefy <stuart.menefy@st.com>
Date: Fri, 25 Sep 2009 18:25:10 +0100
Subject: [PATCH 112/137] sh: Minor optimisations to FPU handling
A number of small optimisations to FPU handling, in particular:
- move the task USEDFPU flag from the thread_info flags field (which
is accessed asynchronously to the thread) to a new status field,
which is only accessed by the thread itself. This allows locking to
be removed in most cases, or can be reduced to a preempt_lock().
This mimics the i386 behaviour.
- move the modification of regs->sr and thread_info->status flags out
of save_fpu() to __unlazy_fpu(). This gives the compiler a better
chance to optimise things, as well as making save_fpu() symmetrical
with restore_fpu() and init_fpu().
- implement prepare_to_copy(), so that when creating a thread, we can
unlazy the FPU prior to copying the thread data structures.
Also make sure that the FPU is disabled while in the kernel, in
particular while booting, and for newly created kernel threads,
In a very artificial benchmark, the execution time for 2500000
context switches was reduced from 50 to 45 seconds.
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/fpu.h | 26 +++++++++++++++-----------
arch/sh/include/asm/processor_32.h | 3 ++-
arch/sh/include/asm/thread_info.h | 4 ++--
arch/sh/kernel/cpu/init.c | 4 ++--
arch/sh/kernel/cpu/sh2a/fpu.c | 11 ++++-------
arch/sh/kernel/cpu/sh4/fpu.c | 12 ++++--------
arch/sh/kernel/process_32.c | 24 ++++++++++++++++--------
arch/sh/math-emu/math.c | 6 +++---
8 files changed, 48 insertions(+), 42 deletions(-)
diff --git a/arch/sh/include/asm/fpu.h b/arch/sh/include/asm/fpu.h
index bfd78e19de1b..d7709c06fac4 100644
--- a/arch/sh/include/asm/fpu.h
+++ b/arch/sh/include/asm/fpu.h
@@ -18,17 +18,14 @@ static inline void grab_fpu(struct pt_regs *regs)
struct task_struct;
-extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
+extern void save_fpu(struct task_struct *__tsk);
void fpu_state_restore(struct pt_regs *regs);
#else
+#define save_fpu(tsk) do { } while (0)
#define release_fpu(regs) do { } while (0)
#define grab_fpu(regs) do { } while (0)
-static inline void save_fpu(struct task_struct *tsk, struct pt_regs *regs)
-{
- clear_tsk_thread_flag(tsk, TIF_USEDFPU);
-}
#endif
struct user_regset;
@@ -40,21 +37,28 @@ extern int fpregs_get(struct task_struct *target,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf);
+static inline void __unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
+{
+ if (task_thread_info(tsk)->status & TS_USEDFPU) {
+ task_thread_info(tsk)->status &= ~TS_USEDFPU;
+ save_fpu(tsk);
+ release_fpu(regs);
+ } else
+ tsk->fpu_counter = 0;
+}
+
static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
{
preempt_disable();
- if (test_tsk_thread_flag(tsk, TIF_USEDFPU))
- save_fpu(tsk, regs);
- else
- tsk->fpu_counter = 0;
+ __unlazy_fpu(tsk, regs);
preempt_enable();
}
static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs)
{
preempt_disable();
- if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) {
- clear_tsk_thread_flag(tsk, TIF_USEDFPU);
+ if (task_thread_info(tsk)->status & TS_USEDFPU) {
+ task_thread_info(tsk)->status &= ~TS_USEDFPU;
release_fpu(regs);
}
preempt_enable();
diff --git a/arch/sh/include/asm/processor_32.h b/arch/sh/include/asm/processor_32.h
index 9a8714945dc9..1f3d6fab660c 100644
--- a/arch/sh/include/asm/processor_32.h
+++ b/arch/sh/include/asm/processor_32.h
@@ -56,6 +56,7 @@ asmlinkage void __init sh_cpu_init(void);
#define SR_DSP 0x00001000
#define SR_IMASK 0x000000f0
#define SR_FD 0x00008000
+#define SR_MD 0x40000000
/*
* DSP structure and data
@@ -136,7 +137,7 @@ struct mm_struct;
extern void release_thread(struct task_struct *);
/* Prepare to copy thread state - unlazy all lazy status */
-#define prepare_to_copy(tsk) do { } while (0)
+void prepare_to_copy(struct task_struct *tsk);
/*
* create a kernel thread without removing it from tasklists
diff --git a/arch/sh/include/asm/thread_info.h b/arch/sh/include/asm/thread_info.h
index 23eeed89467a..1f3d927e2265 100644
--- a/arch/sh/include/asm/thread_info.h
+++ b/arch/sh/include/asm/thread_info.h
@@ -51,6 +51,7 @@ struct thread_info {
.task = &tsk, \
.exec_domain = &default_exec_domain, \
.flags = 0, \
+ .status = 0, \
.cpu = 0, \
.preempt_count = INIT_PREEMPT_COUNT, \
.addr_limit = KERNEL_DS, \
@@ -117,7 +118,6 @@ extern void free_thread_info(struct thread_info *ti);
#define TIF_SECCOMP 6 /* secure computing */
#define TIF_NOTIFY_RESUME 7 /* callback before returning to user */
#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */
-#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 18
#define TIF_FREEZE 19 /* Freezing for suspend */
@@ -130,7 +130,6 @@ extern void free_thread_info(struct thread_info *ti);
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
-#define _TIF_USEDFPU (1 << TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_FREEZE (1 << TIF_FREEZE)
@@ -163,6 +162,7 @@ extern void free_thread_info(struct thread_info *ti);
* have to worry about atomic accesses.
*/
#define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */
+#define TS_USEDFPU 0x0002 /* FPU used by this task this quantum */
#ifndef __ASSEMBLY__
#define HAVE_SET_RESTORE_SIGMASK 1
diff --git a/arch/sh/kernel/cpu/init.c b/arch/sh/kernel/cpu/init.c
index 580d58b94cc5..ad9dfff9427c 100644
--- a/arch/sh/kernel/cpu/init.c
+++ b/arch/sh/kernel/cpu/init.c
@@ -311,12 +311,12 @@ asmlinkage void __init sh_cpu_init(void)
if (fpu_disabled) {
printk("FPU Disabled\n");
current_cpu_data.flags &= ~CPU_HAS_FPU;
- disable_fpu();
}
/* FPU initialization */
+ disable_fpu();
if ((current_cpu_data.flags & CPU_HAS_FPU)) {
- clear_thread_flag(TIF_USEDFPU);
+ current_thread_info()->status &= ~TS_USEDFPU;
clear_used_math();
}
diff --git a/arch/sh/kernel/cpu/sh2a/fpu.c b/arch/sh/kernel/cpu/sh2a/fpu.c
index 6df2fb98eb30..13817ee49d52 100644
--- a/arch/sh/kernel/cpu/sh2a/fpu.c
+++ b/arch/sh/kernel/cpu/sh2a/fpu.c
@@ -25,14 +25,12 @@
/*
* Save FPU registers onto task structure.
- * Assume called with FPU enabled (SR.FD=0).
*/
void
-save_fpu(struct task_struct *tsk, struct pt_regs *regs)
+save_fpu(struct task_struct *tsk)
{
unsigned long dummy;
- clear_tsk_thread_flag(tsk, TIF_USEDFPU);
enable_fpu();
asm volatile("sts.l fpul, @-%0\n\t"
"sts.l fpscr, @-%0\n\t"
@@ -60,7 +58,6 @@ save_fpu(struct task_struct *tsk, struct pt_regs *regs)
: "memory");
disable_fpu();
- release_fpu(regs);
}
static void
@@ -598,13 +595,13 @@ BUILD_TRAP_HANDLER(fpu_error)
struct task_struct *tsk = current;
TRAP_HANDLER_DECL;
- save_fpu(tsk, regs);
+ __unlazy_fpu(tsk, regs);
if (ieee_fpe_handler(regs)) {
tsk->thread.fpu.hard.fpscr &=
~(FPSCR_CAUSE_MASK | FPSCR_FLAG_MASK);
grab_fpu(regs);
restore_fpu(tsk);
- set_tsk_thread_flag(tsk, TIF_USEDFPU);
+ task_thread_info(tsk)->status |= TS_USEDFPU;
return;
}
@@ -630,5 +627,5 @@ BUILD_TRAP_HANDLER(fpu_state_restore)
fpu_init();
set_used_math();
}
- set_tsk_thread_flag(tsk, TIF_USEDFPU);
+ task_thread_info(tsk)->status |= TS_USEDFPU;
}
diff --git a/arch/sh/kernel/cpu/sh4/fpu.c b/arch/sh/kernel/cpu/sh4/fpu.c
index d79226fa59d1..e97857aec8a0 100644
--- a/arch/sh/kernel/cpu/sh4/fpu.c
+++ b/arch/sh/kernel/cpu/sh4/fpu.c
@@ -41,13 +41,11 @@ static unsigned int fpu_exception_flags;
/*
* Save FPU registers onto task structure.
- * Assume called with FPU enabled (SR.FD=0).
*/
-void save_fpu(struct task_struct *tsk, struct pt_regs *regs)
+void save_fpu(struct task_struct *tsk)
{
unsigned long dummy;
- clear_tsk_thread_flag(tsk, TIF_USEDFPU);
enable_fpu();
asm volatile ("sts.l fpul, @-%0\n\t"
"sts.l fpscr, @-%0\n\t"
@@ -92,7 +90,6 @@ void save_fpu(struct task_struct *tsk, struct pt_regs *regs)
:"memory");
disable_fpu();
- release_fpu(regs);
}
static void restore_fpu(struct task_struct *tsk)
@@ -285,7 +282,6 @@ static int ieee_fpe_handler(struct pt_regs *regs)
/* fcnvsd */
struct task_struct *tsk = current;
- save_fpu(tsk, regs);
if ((tsk->thread.fpu.hard.fpscr & FPSCR_CAUSE_ERROR))
/* FPU error */
denormal_to_double(&tsk->thread.fpu.hard,
@@ -462,7 +458,7 @@ BUILD_TRAP_HANDLER(fpu_error)
struct task_struct *tsk = current;
TRAP_HANDLER_DECL;
- save_fpu(tsk, regs);
+ __unlazy_fpu(tsk, regs);
fpu_exception_flags = 0;
if (ieee_fpe_handler(regs)) {
tsk->thread.fpu.hard.fpscr &=
@@ -473,7 +469,7 @@ BUILD_TRAP_HANDLER(fpu_error)
tsk->thread.fpu.hard.fpscr |= (fpu_exception_flags >> 10);
grab_fpu(regs);
restore_fpu(tsk);
- set_tsk_thread_flag(tsk, TIF_USEDFPU);
+ task_thread_info(tsk)->status |= TS_USEDFPU;
if ((((tsk->thread.fpu.hard.fpscr & FPSCR_ENABLE_MASK) >> 7) &
(fpu_exception_flags >> 2)) == 0) {
return;
@@ -502,7 +498,7 @@ void fpu_state_restore(struct pt_regs *regs)
fpu_init();
set_used_math();
}
- set_tsk_thread_flag(tsk, TIF_USEDFPU);
+ task_thread_info(tsk)->status |= TS_USEDFPU;
tsk->fpu_counter++;
}
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index 7733f5fa6bb5..d721f9297c09 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -134,7 +134,10 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
regs.regs[5] = (unsigned long)fn;
regs.pc = (unsigned long)kernel_thread_helper;
- regs.sr = (1 << 30);
+ regs.sr = SR_MD;
+#if defined(CONFIG_SH_FPU)
+ regs.sr |= SR_FD;
+#endif
/* Ok, create the new process.. */
pid = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
@@ -189,6 +192,15 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
}
EXPORT_SYMBOL(dump_fpu);
+/*
+ * This gets called before we allocate a new thread and copy
+ * the current task into it.
+ */
+void prepare_to_copy(struct task_struct *tsk)
+{
+ unlazy_fpu(tsk, task_pt_regs(tsk));
+}
+
asmlinkage void ret_from_fork(void);
int copy_thread(unsigned long clone_flags, unsigned long usp,
@@ -197,16 +209,10 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
{
struct thread_info *ti = task_thread_info(p);
struct pt_regs *childregs;
-#if defined(CONFIG_SH_FPU) || defined(CONFIG_SH_DSP)
+#if defined(CONFIG_SH_DSP)
struct task_struct *tsk = current;
#endif
-#if defined(CONFIG_SH_FPU)
- unlazy_fpu(tsk, regs);
- p->thread.fpu = tsk->thread.fpu;
- copy_to_stopped_child_used_math(p);
-#endif
-
#if defined(CONFIG_SH_DSP)
if (is_dsp_enabled(tsk)) {
/* We can use the __save_dsp or just copy the struct:
@@ -226,6 +232,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
} else {
childregs->regs[15] = (unsigned long)childregs;
ti->addr_limit = KERNEL_DS;
+ ti->status &= ~TS_USEDFPU;
+ p->fpu_counter = 0;
}
if (clone_flags & CLONE_SETTLS)
diff --git a/arch/sh/math-emu/math.c b/arch/sh/math-emu/math.c
index ac2d7abd2567..d6c15cae0912 100644
--- a/arch/sh/math-emu/math.c
+++ b/arch/sh/math-emu/math.c
@@ -558,7 +558,7 @@ static int ieee_fpe_handler(struct pt_regs *regs)
(finsn >> 8) & 0xf);
tsk->thread.fpu.hard.fpscr &=
~(FPSCR_CAUSE_MASK | FPSCR_FLAG_MASK);
- set_tsk_thread_flag(tsk, TIF_USEDFPU);
+ task_thread_info(tsk)->status |= TS_USEDFPU;
} else {
info.si_signo = SIGFPE;
info.si_errno = 0;
@@ -619,10 +619,10 @@ int do_fpu_inst(unsigned short inst, struct pt_regs *regs)
struct task_struct *tsk = current;
struct sh_fpu_soft_struct *fpu = &(tsk->thread.fpu.soft);
- if (!test_tsk_thread_flag(tsk, TIF_USEDFPU)) {
+ if (!(task_thread_info(tsk)->status & TS_USEDFPU)) {
/* initialize once. */
fpu_init(fpu);
- set_tsk_thread_flag(tsk, TIF_USEDFPU);
+ task_thread_info(tsk)->status |= TS_USEDFPU;
}
return fpu_emulate(inst, fpu, regs);
From 0f09e197a39c081fa8c2752ee65919cb6cba963a Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 24 Nov 2009 17:56:17 +0900
Subject: [PATCH 113/137] sh: Apply the sleazy FPU changes for SH-2A FPU as
well.
This plugs in the fpu_counter manipulation for the SH-2A side also.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh2a/fpu.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/arch/sh/kernel/cpu/sh2a/fpu.c b/arch/sh/kernel/cpu/sh2a/fpu.c
index 13817ee49d52..d395ce5740e7 100644
--- a/arch/sh/kernel/cpu/sh2a/fpu.c
+++ b/arch/sh/kernel/cpu/sh2a/fpu.c
@@ -608,18 +608,18 @@ BUILD_TRAP_HANDLER(fpu_error)
force_sig(SIGFPE, tsk);
}
-BUILD_TRAP_HANDLER(fpu_state_restore)
+void fpu_state_restore(struct pt_regs *regs)
{
struct task_struct *tsk = current;
- TRAP_HANDLER_DECL;
grab_fpu(regs);
- if (!user_mode(regs)) {
+ if (unlikely(!user_mode(regs))) {
printk(KERN_ERR "BUG: FPU is used in kernel mode.\n");
+ BUG();
return;
}
- if (used_math()) {
+ if (likely(used_math())) {
/* Using the FPU again. */
restore_fpu(tsk);
} else {
@@ -628,4 +628,12 @@ BUILD_TRAP_HANDLER(fpu_state_restore)
set_used_math();
}
task_thread_info(tsk)->status |= TS_USEDFPU;
+ tsk->fpu_counter++;
+}
+
+BUILD_TRAP_HANDLER(fpu_state_restore)
+{
+ TRAP_HANDLER_DECL;
+
+ fpu_state_restore(regs);
}
From b9e05c64a02a1e699925cb49dd5542087eba0c3a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
Date: Tue, 24 Nov 2009 22:07:23 +0100
Subject: [PATCH 114/137] rtc: don't use __exit_p to wrap ds1302_rtc_remove
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The function ds1302_rtc_remove is defined using __devexit, so don't use
__exit_p but __devexit_p to wrap it.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: linux-kernel@vger.kernel.org
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/rtc/rtc-ds1302.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/rtc/rtc-ds1302.c b/drivers/rtc/rtc-ds1302.c
index d490628b64da..1e73c8f42e38 100644
--- a/drivers/rtc/rtc-ds1302.c
+++ b/drivers/rtc/rtc-ds1302.c
@@ -201,7 +201,7 @@ static struct platform_driver ds1302_platform_driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
- .remove = __exit_p(ds1302_rtc_remove),
+ .remove = __devexit_p(ds1302_rtc_remove),
};
static int __init ds1302_rtc_init(void)
From b9e39c89a9639e5005d8225a23fb7faf118a85eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
Date: Tue, 24 Nov 2009 22:07:32 +0100
Subject: [PATCH 115/137] serial: sh-sci: don't use __devexit_p to wrap
sci_remove
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The function sci_remove is defined without any section modifier, so
don't use __devexit_p to wrap it.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Magnus Damm <damm@opensource.se>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/serial/sh-sci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 6498bd1fb6dd..89421fa0d250 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -1370,7 +1370,7 @@ static struct dev_pm_ops sci_dev_pm_ops = {
static struct platform_driver sci_driver = {
.probe = sci_probe,
- .remove = __devexit_p(sci_remove),
+ .remove = sci_remove,
.driver = {
.name = "sh-sci",
.owner = THIS_MODULE,
From 6ba653830c85a37d0a054f1e43d9b51e59d1150b Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 25 Nov 2009 12:07:31 +0900
Subject: [PATCH 116/137] sh: Fix up the FPU emulation build.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/fpu.h | 1 +
arch/sh/kernel/process_32.c | 10 +++-------
2 files changed, 4 insertions(+), 7 deletions(-)
diff --git a/arch/sh/include/asm/fpu.h b/arch/sh/include/asm/fpu.h
index d7709c06fac4..fb6bbb9b1cc8 100644
--- a/arch/sh/include/asm/fpu.h
+++ b/arch/sh/include/asm/fpu.h
@@ -25,6 +25,7 @@ void fpu_state_restore(struct pt_regs *regs);
#define save_fpu(tsk) do { } while (0)
#define release_fpu(regs) do { } while (0)
#define grab_fpu(regs) do { } while (0)
+#define fpu_state_restore(regs) do { } while (0)
#endif
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index d721f9297c09..d8af889366a4 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -300,13 +300,11 @@ __switch_to(struct task_struct *prev, struct task_struct *next)
{
struct thread_struct *next_t = &next->thread;
-#if defined(CONFIG_SH_FPU)
unlazy_fpu(prev, task_pt_regs(prev));
/* we're going to use this soon, after a few expensive things */
if (next->fpu_counter > 5)
prefetch(&next_t->fpu.hard);
-#endif
#ifdef CONFIG_MMU
/*
@@ -337,15 +335,13 @@ __switch_to(struct task_struct *prev, struct task_struct *next)
#endif
}
-#if defined(CONFIG_SH_FPU)
- /* If the task has used fpu the last 5 timeslices, just do a full
+ /*
+ * If the task has used fpu the last 5 timeslices, just do a full
* restore of the math state immediately to avoid the trap; the
* chances of needing FPU soon are obviously high now
*/
- if (next->fpu_counter > 5) {
+ if (next->fpu_counter > 5)
fpu_state_restore(task_pt_regs(next));
- }
-#endif
return prev;
}
From edad1f208e6edabb917e4f8a33c7e45bf78bb79d Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 25 Nov 2009 16:23:35 +0900
Subject: [PATCH 117/137] serial: sh-sci: Depend on HAVE_CLK unconditionally.
The sh-sci code conditionalized the clock framework support in order to
give the other platforms a chance to catch up. sh64 supported this some
time ago and the forthcoming ARM changes handle this as well, this leaves
h8300 as the odd one out. H8300 has had since 2.5 to merge it's sh-sci
support upstream, and has yet to do so. At this point I will no longer be
holding back the driver to support an unreponsive architecture, 7 years
is quite enough of a grace period. Support is easily implemented on the
architecture if and when it ever decides to merge its changes upstream.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/serial/Kconfig | 2 +-
drivers/serial/sh-sci.c | 53 +----------------------------------------
drivers/serial/sh-sci.h | 2 +-
3 files changed, 3 insertions(+), 54 deletions(-)
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index e52257257279..30b58eeb439f 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -996,7 +996,7 @@ config SERIAL_IP22_ZILOG_CONSOLE
config SERIAL_SH_SCI
tristate "SuperH SCI(F) serial port support"
- depends on SUPERH || H8300
+ depends on HAVE_CLK && (SUPERH || H8300)
select SERIAL_CORE
config SERIAL_SH_SCI_NR_UARTS
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 89421fa0d250..972fca0a3ef1 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -50,7 +50,6 @@
#include <linux/list.h>
#ifdef CONFIG_SUPERH
-#include <asm/clock.h>
#include <asm/sh_bios.h>
#endif
@@ -79,22 +78,18 @@ struct sci_port {
struct timer_list break_timer;
int break_flag;
-#ifdef CONFIG_HAVE_CLK
/* Interface clock */
struct clk *iclk;
/* Data clock */
struct clk *dclk;
-#endif
+
struct list_head node;
};
struct sh_sci_priv {
spinlock_t lock;
struct list_head ports;
-
-#ifdef CONFIG_HAVE_CLK
struct notifier_block clk_nb;
-#endif
};
/* Function prototypes */
@@ -156,32 +151,6 @@ static void sci_poll_put_char(struct uart_port *port, unsigned char c)
}
#endif /* CONFIG_CONSOLE_POLL || CONFIG_SERIAL_SH_SCI_CONSOLE */
-#if defined(__H8300S__)
-enum { sci_disable, sci_enable };
-
-static void h8300_sci_config(struct uart_port *port, unsigned int ctrl)
-{
- volatile unsigned char *mstpcrl = (volatile unsigned char *)MSTPCRL;
- int ch = (port->mapbase - SMR0) >> 3;
- unsigned char mask = 1 << (ch+1);
-
- if (ctrl == sci_disable)
- *mstpcrl |= mask;
- else
- *mstpcrl &= ~mask;
-}
-
-static void h8300_sci_enable(struct uart_port *port)
-{
- h8300_sci_config(port, sci_enable);
-}
-
-static void h8300_sci_disable(struct uart_port *port)
-{
- h8300_sci_config(port, sci_disable);
-}
-#endif
-
#if defined(__H8300H__) || defined(__H8300S__)
static void sci_init_pins(struct uart_port *port, unsigned int cflag)
{
@@ -733,7 +702,6 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
return ret;
}
-#ifdef CONFIG_HAVE_CLK
/*
* Here we define a transistion notifier so that we can update all of our
* ports' baud rate when the peripheral clock changes.
@@ -751,7 +719,6 @@ static int sci_notifier(struct notifier_block *self,
spin_lock_irqsave(&priv->lock, flags);
list_for_each_entry(sci_port, &priv->ports, node)
sci_port->port.uartclk = clk_get_rate(sci_port->dclk);
-
spin_unlock_irqrestore(&priv->lock, flags);
}
@@ -778,7 +745,6 @@ static void sci_clk_disable(struct uart_port *port)
clk_disable(sci_port->dclk);
}
-#endif
static int sci_request_irq(struct sci_port *port)
{
@@ -1077,21 +1043,10 @@ static void __devinit sci_init_single(struct platform_device *dev,
sci_port->port.iotype = UPIO_MEM;
sci_port->port.line = index;
sci_port->port.fifosize = 1;
-
-#if defined(__H8300H__) || defined(__H8300S__)
-#ifdef __H8300S__
- sci_port->enable = h8300_sci_enable;
- sci_port->disable = h8300_sci_disable;
-#endif
- sci_port->port.uartclk = CONFIG_CPU_CLOCK;
-#elif defined(CONFIG_HAVE_CLK)
sci_port->iclk = p->clk ? clk_get(&dev->dev, p->clk) : NULL;
sci_port->dclk = clk_get(&dev->dev, "peripheral_clk");
sci_port->enable = sci_clk_enable;
sci_port->disable = sci_clk_disable;
-#else
-#error "Need a valid uartclk"
-#endif
sci_port->break_timer.data = (unsigned long)sci_port;
sci_port->break_timer.function = sci_break_timer;
@@ -1106,7 +1061,6 @@ static void __devinit sci_init_single(struct platform_device *dev,
sci_port->type = sci_port->port.type = p->type;
memcpy(&sci_port->irqs, &p->irqs, sizeof(p->irqs));
-
}
#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
@@ -1239,14 +1193,11 @@ static int sci_remove(struct platform_device *dev)
struct sci_port *p;
unsigned long flags;
-#ifdef CONFIG_HAVE_CLK
cpufreq_unregister_notifier(&priv->clk_nb, CPUFREQ_TRANSITION_NOTIFIER);
-#endif
spin_lock_irqsave(&priv->lock, flags);
list_for_each_entry(p, &priv->ports, node)
uart_remove_one_port(&sci_uart_driver, &p->port);
-
spin_unlock_irqrestore(&priv->lock, flags);
kfree(priv);
@@ -1307,10 +1258,8 @@ static int __devinit sci_probe(struct platform_device *dev)
spin_lock_init(&priv->lock);
platform_set_drvdata(dev, priv);
-#ifdef CONFIG_HAVE_CLK
priv->clk_nb.notifier_call = sci_notifier;
cpufreq_register_notifier(&priv->clk_nb, CPUFREQ_TRANSITION_NOTIFIER);
-#endif
if (dev->id != -1) {
ret = sci_probe_single(dev, dev->id, p, &sci_ports[dev->id]);
diff --git a/drivers/serial/sh-sci.h b/drivers/serial/sh-sci.h
index 3e2fcf93b42e..a32094eeb42b 100644
--- a/drivers/serial/sh-sci.h
+++ b/drivers/serial/sh-sci.h
@@ -1,5 +1,5 @@
#include <linux/serial_core.h>
-#include <asm/io.h>
+#include <linux/io.h>
#include <linux/gpio.h>
#if defined(CONFIG_H83007) || defined(CONFIG_H83068)
From c60f55fa1f82984bbb168c7721db893451f9de6c Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Date: Thu, 26 Nov 2009 06:00:29 +0000
Subject: [PATCH 118/137] sh: mach-ecovec24: modify address map
ecovec24 board expect address map 2 instead of map 1
Signed-off-by: Mizukawa Tatsuo <mizukawa.tatsuo@renesas.com>
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/mach-ecovec24/mach/partner-jet-setup.txt | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sh/include/mach-ecovec24/mach/partner-jet-setup.txt b/arch/sh/include/mach-ecovec24/mach/partner-jet-setup.txt
index 8b8e4fa1fee9..09aaabc43c5e 100644
--- a/arch/sh/include/mach-ecovec24/mach/partner-jet-setup.txt
+++ b/arch/sh/include/mach-ecovec24/mach/partner-jet-setup.txt
@@ -28,7 +28,7 @@ WAIT 1
LIST "BSC"
ED 0xff800020, 0xa5a50000
-ED 0xfec10000, 0x00000013
+ED 0xfec10000, 0x00001013
ED 0xfec10004, 0x11110400
ED 0xfec10024, 0x00000440
From be9cd7b6f84fd0cc59c8770771073b5c66f958ac Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 27 Nov 2009 04:31:27 +0000
Subject: [PATCH 119/137] mfd: Add power control platform data to SDHI driver
This patch adds platform data with a function for power
control to the SDHI driver. The idea is that board specific
code can provide their own functions so power can be enabled
and disabled for the sd-cards.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/mfd/sh_mobile_sdhi.c | 11 +++++++++++
include/linux/mfd/sh_mobile_sdhi.h | 8 ++++++++
2 files changed, 19 insertions(+)
create mode 100644 include/linux/mfd/sh_mobile_sdhi.h
diff --git a/drivers/mfd/sh_mobile_sdhi.c b/drivers/mfd/sh_mobile_sdhi.c
index 56f72cc1d569..03efae8041ab 100644
--- a/drivers/mfd/sh_mobile_sdhi.c
+++ b/drivers/mfd/sh_mobile_sdhi.c
@@ -24,6 +24,7 @@
#include <linux/mfd/core.h>
#include <linux/mfd/tmio.h>
+#include <linux/mfd/sh_mobile_sdhi.h>
struct sh_mobile_sdhi {
struct clk *clk;
@@ -50,6 +51,15 @@ static struct mfd_cell sh_mobile_sdhi_cell = {
.resources = sh_mobile_sdhi_resources,
};
+static void sh_mobile_sdhi_set_pwr(struct platform_device *tmio, int state)
+{
+ struct platform_device *pdev = to_platform_device(tmio->dev.parent);
+ struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+
+ if (p && p->set_pwr)
+ p->set_pwr(pdev, state);
+}
+
static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
{
struct sh_mobile_sdhi *priv;
@@ -87,6 +97,7 @@ static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
/* FIXME: silly const unsigned int hclk */
*(unsigned int *)&priv->mmc_data.hclk = clk_get_rate(priv->clk);
+ priv->mmc_data.set_pwr = sh_mobile_sdhi_set_pwr;
memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
priv->cell_mmc.driver_data = &priv->mmc_data;
diff --git a/include/linux/mfd/sh_mobile_sdhi.h b/include/linux/mfd/sh_mobile_sdhi.h
new file mode 100644
index 000000000000..3bcd7163485c
--- /dev/null
+++ b/include/linux/mfd/sh_mobile_sdhi.h
@@ -0,0 +1,8 @@
+#ifndef __SH_MOBILE_SDHI_H__
+#define __SH_MOBILE_SDHI_H__
+
+struct sh_mobile_sdhi_info {
+ void (*set_pwr)(struct platform_device *pdev, int state);
+};
+
+#endif /* __SH_MOBILE_SDHI_H__ */
From 98779ad8226c6f6e301fa186c07247e78c6f7253 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 27 Nov 2009 04:36:58 +0000
Subject: [PATCH 120/137] sh: Add SDHI power control support to Ecovec
This patch adds support for SDHI power control to the
Ecovec board. Platform data and power control callbacks
for SDHI0 and SDHI1 are added. Power is by default off.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-ecovec24/setup.c | 36 +++++++++++++++++++++++-----
1 file changed, 30 insertions(+), 6 deletions(-)
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index 2274985753a4..5932f049e782 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -20,6 +20,7 @@
#include <linux/i2c.h>
#include <linux/i2c/tsc2007.h>
#include <linux/input.h>
+#include <linux/mfd/sh_mobile_sdhi.h>
#include <video/sh_mobile_lcdc.h>
#include <media/sh_mobile_ceu.h>
#include <asm/heartbeat.h>
@@ -421,6 +422,15 @@ static struct i2c_board_info ts_i2c_clients = {
};
/* SHDI0 */
+static void sdhi0_set_pwr(struct platform_device *pdev, int state)
+{
+ gpio_set_value(GPIO_PTB6, state);
+}
+
+static struct sh_mobile_sdhi_info sdhi0_info = {
+ .set_pwr = sdhi0_set_pwr,
+};
+
static struct resource sdhi0_resources[] = {
[0] = {
.name = "SDHI0",
@@ -439,12 +449,24 @@ static struct platform_device sdhi0_device = {
.num_resources = ARRAY_SIZE(sdhi0_resources),
.resource = sdhi0_resources,
.id = 0,
+ .dev = {
+ .platform_data = &sdhi0_info,
+ },
.archdata = {
.hwblk_id = HWBLK_SDHI0,
},
};
/* SHDI1 */
+static void sdhi1_set_pwr(struct platform_device *pdev, int state)
+{
+ gpio_set_value(GPIO_PTB7, state);
+}
+
+static struct sh_mobile_sdhi_info sdhi1_info = {
+ .set_pwr = sdhi1_set_pwr,
+};
+
static struct resource sdhi1_resources[] = {
[0] = {
.name = "SDHI1",
@@ -463,6 +485,9 @@ static struct platform_device sdhi1_device = {
.num_resources = ARRAY_SIZE(sdhi1_resources),
.resource = sdhi1_resources,
.id = 1,
+ .dev = {
+ .platform_data = &sdhi1_info,
+ },
.archdata = {
.hwblk_id = HWBLK_SDHI1,
},
@@ -748,7 +773,7 @@ static int __init arch_setup(void)
gpio_direction_input(GPIO_PTR5);
gpio_direction_input(GPIO_PTR6);
- /* enable SDHI0 */
+ /* enable SDHI0 (needs DS2.4 set to ON) */
gpio_request(GPIO_FN_SDHI0CD, NULL);
gpio_request(GPIO_FN_SDHI0WP, NULL);
gpio_request(GPIO_FN_SDHI0CMD, NULL);
@@ -757,8 +782,10 @@ static int __init arch_setup(void)
gpio_request(GPIO_FN_SDHI0D2, NULL);
gpio_request(GPIO_FN_SDHI0D1, NULL);
gpio_request(GPIO_FN_SDHI0D0, NULL);
+ gpio_request(GPIO_PTB6, NULL);
+ gpio_direction_output(GPIO_PTB6, 0);
- /* enable SDHI1 */
+ /* enable SDHI1 (needs DS2.6,7 set to ON,OFF) */
gpio_request(GPIO_FN_SDHI1CD, NULL);
gpio_request(GPIO_FN_SDHI1WP, NULL);
gpio_request(GPIO_FN_SDHI1CMD, NULL);
@@ -767,11 +794,8 @@ static int __init arch_setup(void)
gpio_request(GPIO_FN_SDHI1D2, NULL);
gpio_request(GPIO_FN_SDHI1D1, NULL);
gpio_request(GPIO_FN_SDHI1D0, NULL);
-
- gpio_request(GPIO_PTB6, NULL);
gpio_request(GPIO_PTB7, NULL);
- gpio_direction_output(GPIO_PTB6, 1);
- gpio_direction_output(GPIO_PTB7, 1);
+ gpio_direction_output(GPIO_PTB7, 0);
/* I/O buffer drive ability is high for SDHI1 */
ctrl_outw((ctrl_inw(IODRIVEA) & ~0x3000) | 0x2000 , IODRIVEA);
From 2ebe0ff7e669e7d5fc51c2add74dd71692d7bc8d Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 27 Nov 2009 05:16:21 +0000
Subject: [PATCH 121/137] sh: Add CPG save/restore code for sh7724 R-standby
Add sh7724 code to save and restore CPG state during
R-standby. Only CPG registers IRDACLKCR and SPUCLKCR
require software save and restore.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4a/setup-sh7724.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index 9c3cc8f638b6..16e18749ac1b 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -941,6 +941,9 @@ static struct {
/* RWDT */
unsigned short rwtcnt;
unsigned short rwtcsr;
+ /* CPG */
+ unsigned long irdaclk;
+ unsigned long spuclk;
} sh7724_rstandby_state;
static int sh7724_pre_sleep_notifier_call(struct notifier_block *nb,
@@ -998,6 +1001,10 @@ static int sh7724_pre_sleep_notifier_call(struct notifier_block *nb,
sh7724_rstandby_state.rwtcsr |= 0xa500;
__raw_writew(sh7724_rstandby_state.rwtcsr & 0x07, 0xa4520004);
+ /* CPG */
+ sh7724_rstandby_state.irdaclk = __raw_readl(0xa4150018); /* IRDACLKCR */
+ sh7724_rstandby_state.spuclk = __raw_readl(0xa415003c); /* SPUCLKCR */
+
return NOTIFY_DONE;
}
@@ -1052,6 +1059,10 @@ static int sh7724_post_sleep_notifier_call(struct notifier_block *nb,
__raw_writew(sh7724_rstandby_state.rwtcnt, 0xa4520000); /* RWTCNT */
__raw_writew(sh7724_rstandby_state.rwtcsr, 0xa4520004); /* RWTCSR */
+ /* CPG */
+ __raw_writel(sh7724_rstandby_state.irdaclk, 0xa4150018); /* IRDACLKCR */
+ __raw_writel(sh7724_rstandby_state.spuclk, 0xa415003c); /* SPUCLKCR */
+
return NOTIFY_DONE;
}
From 9a1607071c293e48b08bd703733480b1d55c7b93 Mon Sep 17 00:00:00 2001
From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Fri, 27 Nov 2009 06:42:16 +0000
Subject: [PATCH 122/137] sh: convert /proc/cpu/aligmnent,
/proc/cpu/kernel_alignment to seq_file
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/traps_32.c | 79 ++++++++++++++++-----------------------
1 file changed, 32 insertions(+), 47 deletions(-)
diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index 114d21761823..3da5a125d884 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -25,6 +25,7 @@
#include <linux/kexec.h>
#include <linux/limits.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/sysfs.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@@ -68,61 +69,49 @@ static const char *se_usermode_action[] = {
"signal+warn"
};
-static int
-proc_alignment_read(char *page, char **start, off_t off, int count, int *eof,
- void *data)
+static int alignment_proc_show(struct seq_file *m, void *v)
{
- char *p = page;
- int len;
-
- p += sprintf(p, "User:\t\t%lu\n", se_user);
- p += sprintf(p, "System:\t\t%lu\n", se_sys);
- p += sprintf(p, "Half:\t\t%lu\n", se_half);
- p += sprintf(p, "Word:\t\t%lu\n", se_word);
- p += sprintf(p, "DWord:\t\t%lu\n", se_dword);
- p += sprintf(p, "Multi:\t\t%lu\n", se_multi);
- p += sprintf(p, "User faults:\t%i (%s)\n", se_usermode,
+ seq_printf(m, "User:\t\t%lu\n", se_user);
+ seq_printf(m, "System:\t\t%lu\n", se_sys);
+ seq_printf(m, "Half:\t\t%lu\n", se_half);
+ seq_printf(m, "Word:\t\t%lu\n", se_word);
+ seq_printf(m, "DWord:\t\t%lu\n", se_dword);
+ seq_printf(m, "Multi:\t\t%lu\n", se_multi);
+ seq_printf(m, "User faults:\t%i (%s)\n", se_usermode,
se_usermode_action[se_usermode]);
- p += sprintf(p, "Kernel faults:\t%i (fixup%s)\n", se_kernmode_warn,
+ seq_printf(m, "Kernel faults:\t%i (fixup%s)\n", se_kernmode_warn,
se_kernmode_warn ? "+warn" : "");
-
- len = (p - page) - off;
- if (len < 0)
- len = 0;
-
- *eof = (len <= count) ? 1 : 0;
- *start = page + off;
-
- return len;
+ return 0;
}
-static int proc_alignment_write(struct file *file, const char __user *buffer,
- unsigned long count, void *data)
+static int alignment_proc_open(struct inode *inode, struct file *file)
{
+ return single_open(file, alignment_proc_show, NULL);
+}
+
+static ssize_t alignment_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *pos)
+{
+ int *data = PDE(file->f_path.dentry->d_inode)->data;
char mode;
if (count > 0) {
if (get_user(mode, buffer))
return -EFAULT;
if (mode >= '0' && mode <= '5')
- se_usermode = mode - '0';
+ *data = mode - '0';
}
return count;
}
-static int proc_alignment_kern_write(struct file *file, const char __user *buffer,
- unsigned long count, void *data)
-{
- char mode;
-
- if (count > 0) {
- if (get_user(mode, buffer))
- return -EFAULT;
- if (mode >= '0' && mode <= '1')
- se_kernmode_warn = mode - '0';
- }
- return count;
-}
+static const struct file_operations alignment_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = alignment_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = alignment_proc_write,
+};
#endif
static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
@@ -1006,20 +995,16 @@ static int __init alignment_init(void)
if (!dir)
return -ENOMEM;
- res = create_proc_entry("alignment", S_IWUSR | S_IRUGO, dir);
+ res = proc_create_data("alignment", S_IWUSR | S_IRUGO, dir,
+ &alignment_proc_fops, &se_usermode);
if (!res)
return -ENOMEM;
- res->read_proc = proc_alignment_read;
- res->write_proc = proc_alignment_write;
-
- res = create_proc_entry("kernel_alignment", S_IWUSR | S_IRUGO, dir);
+ res = proc_create_data("kernel_alignment", S_IWUSR | S_IRUGO, dir,
+ &alignment_proc_fops, &se_kernmode_warn);
if (!res)
return -ENOMEM;
- res->read_proc = proc_alignment_read;
- res->write_proc = proc_alignment_kern_write;
-
return 0;
}
From fc1d003de39c306a44abce97c346921de31277cd Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 27 Nov 2009 07:32:24 +0000
Subject: [PATCH 123/137] sh: Move KEYSC header file
This patch moves the KEYSC header file from the
SuperH specific asm directory to a place where
it can be shared by multiple architectures.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-ecovec24/setup.c | 2 +-
arch/sh/boards/mach-kfr2r09/setup.c | 2 +-
arch/sh/boards/mach-migor/setup.c | 2 +-
arch/sh/boards/mach-se/7722/setup.c | 2 +-
arch/sh/boards/mach-se/7724/setup.c | 2 +-
drivers/input/keyboard/sh_keysc.c | 2 +-
{arch/sh/include/asm => include/linux/input}/sh_keysc.h | 6 +++---
7 files changed, 9 insertions(+), 9 deletions(-)
rename {arch/sh/include/asm => include/linux/input}/sh_keysc.h (75%)
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index 5932f049e782..0dd98ed5f7a8 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -20,12 +20,12 @@
#include <linux/i2c.h>
#include <linux/i2c/tsc2007.h>
#include <linux/input.h>
+#include <linux/input/sh_keysc.h>
#include <linux/mfd/sh_mobile_sdhi.h>
#include <video/sh_mobile_lcdc.h>
#include <media/sh_mobile_ceu.h>
#include <asm/heartbeat.h>
#include <asm/sh_eth.h>
-#include <asm/sh_keysc.h>
#include <asm/clock.h>
#include <asm/suspend.h>
#include <cpu/sh7724.h>
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index 85fa8a3b7f73..e755bad6dc15 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -16,6 +16,7 @@
#include <linux/clk.h>
#include <linux/gpio.h>
#include <linux/input.h>
+#include <linux/input/sh_keysc.h>
#include <linux/i2c.h>
#include <linux/usb/r8a66597.h>
#include <media/soc_camera.h>
@@ -25,7 +26,6 @@
#include <asm/clock.h>
#include <asm/machvec.h>
#include <asm/io.h>
-#include <asm/sh_keysc.h>
#include <cpu/sh7724.h>
#include <mach/kfr2r09.h>
diff --git a/arch/sh/boards/mach-migor/setup.c b/arch/sh/boards/mach-migor/setup.c
index 369525701d60..9099b6da9957 100644
--- a/arch/sh/boards/mach-migor/setup.c
+++ b/arch/sh/boards/mach-migor/setup.c
@@ -11,6 +11,7 @@
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/input.h>
+#include <linux/input/sh_keysc.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/nand.h>
#include <linux/i2c.h>
@@ -25,7 +26,6 @@
#include <asm/clock.h>
#include <asm/machvec.h>
#include <asm/io.h>
-#include <asm/sh_keysc.h>
#include <asm/suspend.h>
#include <mach/migor.h>
#include <cpu/sh7722.h>
diff --git a/arch/sh/boards/mach-se/7722/setup.c b/arch/sh/boards/mach-se/7722/setup.c
index d05f34f6528e..b1cb9425b600 100644
--- a/arch/sh/boards/mach-se/7722/setup.c
+++ b/arch/sh/boards/mach-se/7722/setup.c
@@ -14,6 +14,7 @@
#include <linux/platform_device.h>
#include <linux/ata_platform.h>
#include <linux/input.h>
+#include <linux/input/sh_keysc.h>
#include <linux/smc91x.h>
#include <mach-se/mach/se7722.h>
#include <mach-se/mach/mrshpc.h>
@@ -21,7 +22,6 @@
#include <asm/clock.h>
#include <asm/io.h>
#include <asm/heartbeat.h>
-#include <asm/sh_keysc.h>
#include <cpu/sh7722.h>
/* Heartbeat */
diff --git a/arch/sh/boards/mach-se/7724/setup.c b/arch/sh/boards/mach-se/7724/setup.c
index ae23fa970e6d..da01fc0dc881 100644
--- a/arch/sh/boards/mach-se/7724/setup.c
+++ b/arch/sh/boards/mach-se/7724/setup.c
@@ -19,6 +19,7 @@
#include <linux/smc91x.h>
#include <linux/gpio.h>
#include <linux/input.h>
+#include <linux/input/sh_keysc.h>
#include <linux/usb/r8a66597.h>
#include <video/sh_mobile_lcdc.h>
#include <media/sh_mobile_ceu.h>
@@ -27,7 +28,6 @@
#include <asm/heartbeat.h>
#include <asm/sh_eth.h>
#include <asm/clock.h>
-#include <asm/sh_keysc.h>
#include <asm/suspend.h>
#include <cpu/sh7724.h>
#include <mach-se/mach/se7724.h>
diff --git a/drivers/input/keyboard/sh_keysc.c b/drivers/input/keyboard/sh_keysc.c
index 887af79b7bff..076111fc72d2 100644
--- a/drivers/input/keyboard/sh_keysc.c
+++ b/drivers/input/keyboard/sh_keysc.c
@@ -18,9 +18,9 @@
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/input.h>
+#include <linux/input/sh_keysc.h>
#include <linux/clk.h>
#include <linux/io.h>
-#include <asm/sh_keysc.h>
#define KYCR1_OFFS 0x00
#define KYCR2_OFFS 0x04
diff --git a/arch/sh/include/asm/sh_keysc.h b/include/linux/input/sh_keysc.h
similarity index 75%
rename from arch/sh/include/asm/sh_keysc.h
rename to include/linux/input/sh_keysc.h
index 4a65b1e40eab..c211b5cf08e6 100644
--- a/arch/sh/include/asm/sh_keysc.h
+++ b/include/linux/input/sh_keysc.h
@@ -1,5 +1,5 @@
-#ifndef __ASM_KEYSC_H__
-#define __ASM_KEYSC_H__
+#ifndef __SH_KEYSC_H__
+#define __SH_KEYSC_H__
#define SH_KEYSC_MAXKEYS 30
@@ -11,4 +11,4 @@ struct sh_keysc_info {
int keycodes[SH_KEYSC_MAXKEYS];
};
-#endif /* __ASM_KEYSC_H__ */
+#endif /* __SH_KEYSC_H__ */
From fae4339919c741f89f7e293b8c646207e1df28e1 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 27 Nov 2009 07:38:01 +0000
Subject: [PATCH 124/137] sh: Break out SuperH PFC code
This file breaks out the SuperH PFC code from
arch/sh/kernel/gpio.c + arch/sh/include/asm/gpio.h
to drivers/sh/pfc.c + include/linux/sh_pfc.h.
Similar to the INTC stuff. The non-SuperH specific
file location makes it possible to share the code
between multiple architectures.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/asm/gpio.h | 82 +------------------
arch/sh/kernel/Makefile | 1 -
drivers/sh/Makefile | 1 +
arch/sh/kernel/gpio.c => drivers/sh/pfc.c | 0
include/linux/sh_pfc.h | 96 +++++++++++++++++++++++
5 files changed, 98 insertions(+), 82 deletions(-)
rename arch/sh/kernel/gpio.c => drivers/sh/pfc.c (100%)
create mode 100644 include/linux/sh_pfc.h
diff --git a/arch/sh/include/asm/gpio.h b/arch/sh/include/asm/gpio.h
index 61f93da2c62e..f8d9a731e903 100644
--- a/arch/sh/include/asm/gpio.h
+++ b/arch/sh/include/asm/gpio.h
@@ -20,7 +20,7 @@
#endif
#define ARCH_NR_GPIOS 512
-#include <asm-generic/gpio.h>
+#include <linux/sh_pfc.h>
#ifdef CONFIG_GPIOLIB
@@ -53,84 +53,4 @@ static inline int irq_to_gpio(unsigned int irq)
#endif /* CONFIG_GPIOLIB */
-typedef unsigned short pinmux_enum_t;
-typedef unsigned short pinmux_flag_t;
-
-#define PINMUX_TYPE_NONE 0
-#define PINMUX_TYPE_FUNCTION 1
-#define PINMUX_TYPE_GPIO 2
-#define PINMUX_TYPE_OUTPUT 3
-#define PINMUX_TYPE_INPUT 4
-#define PINMUX_TYPE_INPUT_PULLUP 5
-#define PINMUX_TYPE_INPUT_PULLDOWN 6
-
-#define PINMUX_FLAG_TYPE (0x7)
-#define PINMUX_FLAG_WANT_PULLUP (1 << 3)
-#define PINMUX_FLAG_WANT_PULLDOWN (1 << 4)
-
-#define PINMUX_FLAG_DBIT_SHIFT 5
-#define PINMUX_FLAG_DBIT (0x1f << PINMUX_FLAG_DBIT_SHIFT)
-#define PINMUX_FLAG_DREG_SHIFT 10
-#define PINMUX_FLAG_DREG (0x3f << PINMUX_FLAG_DREG_SHIFT)
-
-struct pinmux_gpio {
- pinmux_enum_t enum_id;
- pinmux_flag_t flags;
-};
-
-#define PINMUX_GPIO(gpio, data_or_mark) [gpio] = { data_or_mark }
-#define PINMUX_DATA(data_or_mark, ids...) data_or_mark, ids, 0
-
-struct pinmux_cfg_reg {
- unsigned long reg, reg_width, field_width;
- unsigned long *cnt;
- pinmux_enum_t *enum_ids;
-};
-
-#define PINMUX_CFG_REG(name, r, r_width, f_width) \
- .reg = r, .reg_width = r_width, .field_width = f_width, \
- .cnt = (unsigned long [r_width / f_width]) {}, \
- .enum_ids = (pinmux_enum_t [(r_width / f_width) * (1 << f_width)]) \
-
-struct pinmux_data_reg {
- unsigned long reg, reg_width, reg_shadow;
- pinmux_enum_t *enum_ids;
-};
-
-#define PINMUX_DATA_REG(name, r, r_width) \
- .reg = r, .reg_width = r_width, \
- .enum_ids = (pinmux_enum_t [r_width]) \
-
-struct pinmux_range {
- pinmux_enum_t begin;
- pinmux_enum_t end;
- pinmux_enum_t force;
-};
-
-struct pinmux_info {
- char *name;
- pinmux_enum_t reserved_id;
- struct pinmux_range data;
- struct pinmux_range input;
- struct pinmux_range input_pd;
- struct pinmux_range input_pu;
- struct pinmux_range output;
- struct pinmux_range mark;
- struct pinmux_range function;
-
- unsigned first_gpio, last_gpio;
-
- struct pinmux_gpio *gpios;
- struct pinmux_cfg_reg *cfg_regs;
- struct pinmux_data_reg *data_regs;
-
- pinmux_enum_t *gpio_data;
- unsigned int gpio_data_size;
-
- unsigned long *gpio_in_use;
- struct gpio_chip chip;
-};
-
-int register_pinmux(struct pinmux_info *pip);
-
#endif /* __ASM_SH_GPIO_H */
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 8edb927a1f30..0471a3eb25ed 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -32,7 +32,6 @@ obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_IO_TRAPPED) += io_trapped.o
obj-$(CONFIG_KPROBES) += kprobes.o
-obj-$(CONFIG_GENERIC_GPIO) += gpio.o
obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
obj-$(CONFIG_FTRACE_SYSCALLS) += ftrace.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
diff --git a/drivers/sh/Makefile b/drivers/sh/Makefile
index 6a025cefe6dc..4956bf1f2134 100644
--- a/drivers/sh/Makefile
+++ b/drivers/sh/Makefile
@@ -3,4 +3,5 @@
#
obj-$(CONFIG_SUPERHYWAY) += superhyway/
obj-$(CONFIG_MAPLE) += maple/
+obj-$(CONFIG_GENERIC_GPIO) += pfc.o
obj-y += intc.o
diff --git a/arch/sh/kernel/gpio.c b/drivers/sh/pfc.c
similarity index 100%
rename from arch/sh/kernel/gpio.c
rename to drivers/sh/pfc.c
diff --git a/include/linux/sh_pfc.h b/include/linux/sh_pfc.h
new file mode 100644
index 000000000000..07c08af9f8f6
--- /dev/null
+++ b/include/linux/sh_pfc.h
@@ -0,0 +1,96 @@
+/*
+ * SuperH Pin Function Controller Support
+ *
+ * Copyright (c) 2008 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef __SH_PFC_H
+#define __SH_PFC_H
+
+#include <asm-generic/gpio.h>
+
+typedef unsigned short pinmux_enum_t;
+typedef unsigned short pinmux_flag_t;
+
+#define PINMUX_TYPE_NONE 0
+#define PINMUX_TYPE_FUNCTION 1
+#define PINMUX_TYPE_GPIO 2
+#define PINMUX_TYPE_OUTPUT 3
+#define PINMUX_TYPE_INPUT 4
+#define PINMUX_TYPE_INPUT_PULLUP 5
+#define PINMUX_TYPE_INPUT_PULLDOWN 6
+
+#define PINMUX_FLAG_TYPE (0x7)
+#define PINMUX_FLAG_WANT_PULLUP (1 << 3)
+#define PINMUX_FLAG_WANT_PULLDOWN (1 << 4)
+
+#define PINMUX_FLAG_DBIT_SHIFT 5
+#define PINMUX_FLAG_DBIT (0x1f << PINMUX_FLAG_DBIT_SHIFT)
+#define PINMUX_FLAG_DREG_SHIFT 10
+#define PINMUX_FLAG_DREG (0x3f << PINMUX_FLAG_DREG_SHIFT)
+
+struct pinmux_gpio {
+ pinmux_enum_t enum_id;
+ pinmux_flag_t flags;
+};
+
+#define PINMUX_GPIO(gpio, data_or_mark) [gpio] = { data_or_mark }
+#define PINMUX_DATA(data_or_mark, ids...) data_or_mark, ids, 0
+
+struct pinmux_cfg_reg {
+ unsigned long reg, reg_width, field_width;
+ unsigned long *cnt;
+ pinmux_enum_t *enum_ids;
+};
+
+#define PINMUX_CFG_REG(name, r, r_width, f_width) \
+ .reg = r, .reg_width = r_width, .field_width = f_width, \
+ .cnt = (unsigned long [r_width / f_width]) {}, \
+ .enum_ids = (pinmux_enum_t [(r_width / f_width) * (1 << f_width)]) \
+
+struct pinmux_data_reg {
+ unsigned long reg, reg_width, reg_shadow;
+ pinmux_enum_t *enum_ids;
+};
+
+#define PINMUX_DATA_REG(name, r, r_width) \
+ .reg = r, .reg_width = r_width, \
+ .enum_ids = (pinmux_enum_t [r_width]) \
+
+struct pinmux_range {
+ pinmux_enum_t begin;
+ pinmux_enum_t end;
+ pinmux_enum_t force;
+};
+
+struct pinmux_info {
+ char *name;
+ pinmux_enum_t reserved_id;
+ struct pinmux_range data;
+ struct pinmux_range input;
+ struct pinmux_range input_pd;
+ struct pinmux_range input_pu;
+ struct pinmux_range output;
+ struct pinmux_range mark;
+ struct pinmux_range function;
+
+ unsigned first_gpio, last_gpio;
+
+ struct pinmux_gpio *gpios;
+ struct pinmux_cfg_reg *cfg_regs;
+ struct pinmux_data_reg *data_regs;
+
+ pinmux_enum_t *gpio_data;
+ unsigned int gpio_data_size;
+
+ unsigned long *gpio_in_use;
+ struct gpio_chip chip;
+};
+
+int register_pinmux(struct pinmux_info *pip);
+
+#endif /* __SH_PFC_H */
From e6d8460aca6311d7ab5371b59dc999bb4d714444 Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 27 Nov 2009 09:28:03 +0000
Subject: [PATCH 125/137] sh: Improve kfr2r09 serial port setup code
This patch improves the serial port communication quality
of port YC401 on the KFR2R09 board. With this fix serial
console is fine at 115200 - up and down keys now work as
expected. Thanks to Hirohide Yamasaki for this fix.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-kfr2r09/setup.c | 51 +++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index e755bad6dc15..87438d6603d6 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -414,11 +414,59 @@ static int kfr2r09_usb0_gadget_i2c_setup(void)
return 0;
}
+
+static int kfr2r09_serial_i2c_setup(void)
+{
+ struct i2c_adapter *a;
+ struct i2c_msg msg;
+ unsigned char buf[2];
+ int ret;
+
+ a = i2c_get_adapter(0);
+ if (!a)
+ return -ENODEV;
+
+ /* set bit 6 (the 7th bit) of chip at 0x09, register 0x13 */
+ buf[0] = 0x13;
+ msg.addr = 0x09;
+ msg.buf = buf;
+ msg.len = 1;
+ msg.flags = 0;
+ ret = i2c_transfer(a, &msg, 1);
+ if (ret != 1)
+ return -ENODEV;
+
+ buf[0] = 0;
+ msg.addr = 0x09;
+ msg.buf = buf;
+ msg.len = 1;
+ msg.flags = I2C_M_RD;
+ ret = i2c_transfer(a, &msg, 1);
+ if (ret != 1)
+ return -ENODEV;
+
+ buf[1] = buf[0] | (1 << 6);
+ buf[0] = 0x13;
+ msg.addr = 0x09;
+ msg.buf = buf;
+ msg.len = 2;
+ msg.flags = 0;
+ ret = i2c_transfer(a, &msg, 1);
+ if (ret != 1)
+ return -ENODEV;
+
+ return 0;
+}
#else
static int kfr2r09_usb0_gadget_i2c_setup(void)
{
return -ENODEV;
}
+
+static int kfr2r09_serial_i2c_setup(void)
+{
+ return -ENODEV;
+}
#endif
static int kfr2r09_usb0_gadget_setup(void)
@@ -463,6 +511,9 @@ static int __init kfr2r09_devices_setup(void)
/* enable SCIF1 serial port for YC401 console support */
gpio_request(GPIO_FN_SCIF1_RXD, NULL);
gpio_request(GPIO_FN_SCIF1_TXD, NULL);
+ kfr2r09_serial_i2c_setup(); /* ECONTMSK(bit6=L10ONEN) set 1 */
+ gpio_request(GPIO_PTG3, NULL); /* HPON_ON */
+ gpio_direction_output(GPIO_PTG3, 1); /* HPON_ON = H */
/* setup NOR flash at CS0 */
ctrl_outl(0x36db0400, BSC_CS0BCR);
From 9cdae914b2d08febca6e6e0440817d60da115ba5 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 30 Nov 2009 12:10:41 +0900
Subject: [PATCH 126/137] sh: pfc: Convert from ctrl_xxx() to __raw_xxx() I/O
routines.
Now that the PFC code is exposed for other architectures, use the common
__raw_xxx() routines instead of the ctrl_xxx() ones. This will be needed
for ARM-based SH-Mobiles amongst others.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/sh/pfc.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc.c
index d22e5af699f9..448ba232c408 100644
--- a/drivers/sh/pfc.c
+++ b/drivers/sh/pfc.c
@@ -35,11 +35,11 @@ static unsigned long gpio_read_raw_reg(unsigned long reg,
{
switch (reg_width) {
case 8:
- return ctrl_inb(reg);
+ return __raw_readb(reg);
case 16:
- return ctrl_inw(reg);
+ return __raw_readw(reg);
case 32:
- return ctrl_inl(reg);
+ return __raw_readl(reg);
}
BUG();
@@ -52,13 +52,13 @@ static void gpio_write_raw_reg(unsigned long reg,
{
switch (reg_width) {
case 8:
- ctrl_outb(data, reg);
+ __raw_writeb(data, reg);
return;
case 16:
- ctrl_outw(data, reg);
+ __raw_writew(data, reg);
return;
case 32:
- ctrl_outl(data, reg);
+ __raw_writel(data, reg);
return;
}
@@ -125,13 +125,13 @@ static void gpio_write_reg(unsigned long reg, unsigned long reg_width,
switch (reg_width) {
case 8:
- ctrl_outb((ctrl_inb(reg) & mask) | value, reg);
+ __raw_writeb((__raw_readb(reg) & mask) | value, reg);
break;
case 16:
- ctrl_outw((ctrl_inw(reg) & mask) | value, reg);
+ __raw_writew((__raw_readw(reg) & mask) | value, reg);
break;
case 32:
- ctrl_outl((ctrl_inl(reg) & mask) | value, reg);
+ __raw_writel((__raw_readl(reg) & mask) | value, reg);
break;
}
}
From fd2cb0ce74e07babaf8c7bf96ef03c25d194e463 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 30 Nov 2009 12:15:04 +0900
Subject: [PATCH 127/137] sh: pfc: pr_info() -> pr_debug() cleanups.
For some reason this was using pr_info() nested under an ifdef DEBUG.
While this is appealing in that it circumvents the effort necessary to
change ones loglevel, it's not terribly practical. So, convert it over
to pr_debug().
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/sh/pfc.c | 25 +++++++++----------------
1 file changed, 9 insertions(+), 16 deletions(-)
diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc.c
index 448ba232c408..841ed5030c8f 100644
--- a/drivers/sh/pfc.c
+++ b/drivers/sh/pfc.c
@@ -7,7 +7,6 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
-
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/list.h>
@@ -72,11 +71,9 @@ static void gpio_write_bit(struct pinmux_data_reg *dr,
pos = dr->reg_width - (in_pos + 1);
-#ifdef DEBUG
- pr_info("write_bit addr = %lx, value = %ld, pos = %ld, "
- "r_width = %ld\n",
- dr->reg, !!value, pos, dr->reg_width);
-#endif
+ pr_debug("write_bit addr = %lx, value = %ld, pos = %ld, "
+ "r_width = %ld\n",
+ dr->reg, !!value, pos, dr->reg_width);
if (value)
set_bit(pos, &dr->reg_shadow);
@@ -95,11 +92,9 @@ static int gpio_read_reg(unsigned long reg, unsigned long reg_width,
mask = (1 << field_width) - 1;
pos = reg_width - ((in_pos + 1) * field_width);
-#ifdef DEBUG
- pr_info("read_reg: addr = %lx, pos = %ld, "
- "r_width = %ld, f_width = %ld\n",
- reg, pos, reg_width, field_width);
-#endif
+ pr_debug("read_reg: addr = %lx, pos = %ld, "
+ "r_width = %ld, f_width = %ld\n",
+ reg, pos, reg_width, field_width);
data = gpio_read_raw_reg(reg, reg_width);
return (data >> pos) & mask;
@@ -114,11 +109,9 @@ static void gpio_write_reg(unsigned long reg, unsigned long reg_width,
mask = (1 << field_width) - 1;
pos = reg_width - ((in_pos + 1) * field_width);
-#ifdef DEBUG
- pr_info("write_reg addr = %lx, value = %ld, pos = %ld, "
- "r_width = %ld, f_width = %ld\n",
- reg, value, pos, reg_width, field_width);
-#endif
+ pr_debug("write_reg addr = %lx, value = %ld, pos = %ld, "
+ "r_width = %ld, f_width = %ld\n",
+ reg, value, pos, reg_width, field_width);
mask = ~(mask << pos);
value = value << pos;
From b1516803d5274386256bef4972dfbf8c9eed5165 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Tue, 1 Dec 2009 09:54:46 +0000
Subject: [PATCH 128/137] serial: sh-sci: Fix too early port disabling.
Currently serial ports on SH CPUs get disabled too early, because the
sci_tx_empty() routine claims to not be able to detect whether the
transmission has been completed and just always returns TIOCSER_TEMT. This
results in corrupt output of last characters if the port is not open for
reading at the same time. It is however possible to detect whether
transmission has been completed. Use the TEND bit of the status register
for this.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
drivers/serial/sh-sci.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 972fca0a3ef1..ff38dbdb5c6e 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -799,8 +799,8 @@ static void sci_free_irq(struct sci_port *port)
static unsigned int sci_tx_empty(struct uart_port *port)
{
- /* Can't detect */
- return TIOCSER_TEMT;
+ unsigned short status = sci_in(port, SCxSR);
+ return status & SCxSR_TEND(port) ? TIOCSER_TEMT : 0;
}
static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl)
From 7e213481d606e41ffb917e42eb88b1586333444b Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Tue, 1 Dec 2009 13:38:52 +0000
Subject: [PATCH 129/137] sh: fix sh7724 VEU3F resource size
Fix one-off VEU3F size error for sh7724.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/sh4a/setup-sh7724.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index 16e18749ac1b..845e89c936e7 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -204,7 +204,7 @@ static struct resource veu0_resources[] = {
[0] = {
.name = "VEU3F0",
.start = 0xfe920000,
- .end = 0xfe9200cb - 1,
+ .end = 0xfe9200cb,
.flags = IORESOURCE_MEM,
},
[1] = {
@@ -236,7 +236,7 @@ static struct resource veu1_resources[] = {
[0] = {
.name = "VEU3F1",
.start = 0xfe924000,
- .end = 0xfe9240cb - 1,
+ .end = 0xfe9240cb,
.flags = IORESOURCE_MEM,
},
[1] = {
From 82b33221784850c32831826619546b848997d80e Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Date: Wed, 2 Dec 2009 09:35:42 +0000
Subject: [PATCH 130/137] sh: mach-ecovec24: LCDC drive ability become high
Drive ability for LCDC become high for safety,
became there is strange individual specificity board in mass production
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/mach-ecovec24/setup.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index 0dd98ed5f7a8..826e62326d51 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -666,8 +666,8 @@ static int __init arch_setup(void)
gpio_direction_output(GPIO_PTR1, 0);
gpio_direction_output(GPIO_PTA2, 0);
- /* I/O buffer drive ability is low */
- ctrl_outw((ctrl_inw(IODRIVEA) & ~0x00c0) | 0x0040 , IODRIVEA);
+ /* I/O buffer drive ability is high */
+ ctrl_outw((ctrl_inw(IODRIVEA) & ~0x00c0) | 0x0080 , IODRIVEA);
if (gpio_get_value(GPIO_PTE6)) {
/* DVI */
From 1c2e36cc9bbd60b8ba1eaa0768da57cf7f7cc570 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Date: Wed, 2 Dec 2009 09:36:18 +0000
Subject: [PATCH 131/137] sh: mach-ecovec24: Remove un-defined settings for VPU
The setting of VPU need not be changed from default.
And current setting value is not defined on SH7724
Reported-by: Goda Yusuke <goda.yusuke@renesas.com>
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/include/mach-ecovec24/mach/partner-jet-setup.txt | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/sh/include/mach-ecovec24/mach/partner-jet-setup.txt b/arch/sh/include/mach-ecovec24/mach/partner-jet-setup.txt
index 09aaabc43c5e..cc737b807334 100644
--- a/arch/sh/include/mach-ecovec24/mach/partner-jet-setup.txt
+++ b/arch/sh/include/mach-ecovec24/mach/partner-jet-setup.txt
@@ -22,7 +22,6 @@ ED 0xff000010, 0x00000004
LIST "setup clocks"
ED 0xa4150024, 0x00004000
ED 0xa4150000, 0x8E003508
-ED 0xa4150004, 0x00000000
WAIT 1
From a65d0d79c49ca6e220f770e49416e924fd9ecaec Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Thu, 3 Dec 2009 12:31:45 +0000
Subject: [PATCH 132/137] sh: allow runtime pm without suspend/resume callbacks
This patch updates the Runtime PM code for SuperH Mobile
to allow drivers to have NULL as pm or callback value.
With this in place there is no need for no-op functions.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/shmobile/pm_runtime.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/arch/sh/kernel/cpu/shmobile/pm_runtime.c b/arch/sh/kernel/cpu/shmobile/pm_runtime.c
index 7c615b17e209..6dcb8166a64d 100644
--- a/arch/sh/kernel/cpu/shmobile/pm_runtime.c
+++ b/arch/sh/kernel/cpu/shmobile/pm_runtime.c
@@ -45,12 +45,14 @@ static int __platform_pm_runtime_resume(struct platform_device *pdev)
dev_dbg(d, "__platform_pm_runtime_resume() [%d]\n", hwblk);
- if (d->driver && d->driver->pm && d->driver->pm->runtime_resume) {
+ if (d->driver) {
hwblk_enable(hwblk_info, hwblk);
ret = 0;
if (test_bit(PDEV_ARCHDATA_FLAG_SUSP, &ad->flags)) {
- ret = d->driver->pm->runtime_resume(d);
+ if (d->driver->pm && d->driver->pm->runtime_resume)
+ ret = d->driver->pm->runtime_resume(d);
+
if (!ret)
clear_bit(PDEV_ARCHDATA_FLAG_SUSP, &ad->flags);
else
@@ -73,12 +75,15 @@ static int __platform_pm_runtime_suspend(struct platform_device *pdev)
dev_dbg(d, "__platform_pm_runtime_suspend() [%d]\n", hwblk);
- if (d->driver && d->driver->pm && d->driver->pm->runtime_suspend) {
+ if (d->driver) {
BUG_ON(!test_bit(PDEV_ARCHDATA_FLAG_IDLE, &ad->flags));
+ ret = 0;
- hwblk_enable(hwblk_info, hwblk);
- ret = d->driver->pm->runtime_suspend(d);
- hwblk_disable(hwblk_info, hwblk);
+ if (d->driver->pm && d->driver->pm->runtime_suspend) {
+ hwblk_enable(hwblk_info, hwblk);
+ ret = d->driver->pm->runtime_suspend(d);
+ hwblk_disable(hwblk_info, hwblk);
+ }
if (!ret) {
set_bit(PDEV_ARCHDATA_FLAG_SUSP, &ad->flags);
From 8144a7dd51712ab58d052f4df4420768ec5489ef Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 4 Dec 2009 13:57:40 +0900
Subject: [PATCH 133/137] sh: Add default uImage rule for se7724, ap325rxa, and
migor.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/Makefile | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index 3ce000eb5570..ac17c5ac550e 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -78,6 +78,9 @@ defaultimage-$(CONFIG_SUPERH32) := zImage
defaultimage-$(CONFIG_SH_SH7785LCR) := uImage
defaultimage-$(CONFIG_SH_RSK) := uImage
defaultimage-$(CONFIG_SH_URQUELL) := uImage
+defaultimage-$(CONFIG_SH_MIGOR) := uImage
+defaultimage-$(CONFIG_SH_AP325RXA) := uImage
+defaultimage-$(CONFIG_SH_7724_SOLUTION_ENGINE) := uImage
defaultimage-$(CONFIG_SH_7206_SOLUTION_ENGINE) := vmlinux
defaultimage-$(CONFIG_SH_7619_SOLUTION_ENGINE) := vmlinux
From 7e01c949989b984c074469e04ab99c47367c7187 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 4 Dec 2009 15:14:52 +0900
Subject: [PATCH 134/137] sh: Partial revert of copy/clear_user_highpage()
optimizations.
These still require more testing, so revert them for now. We keep the
off-by-1 in the fixmap colouring and drop the rest.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/cache.c | 66 +++++++++-------------------------------------
1 file changed, 13 insertions(+), 53 deletions(-)
diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c
index 997c7e42b1e1..e9415d3ea94a 100644
--- a/arch/sh/mm/cache.c
+++ b/arch/sh/mm/cache.c
@@ -46,18 +46,6 @@ static inline void cacheop_on_each_cpu(void (*func) (void *info), void *info,
preempt_enable();
}
-/*
- * copy_to_user_page
- * @vma: vm_area_struct holding the pages
- * @page: struct page
- * @vaddr: user space address
- * @dst: address of page in kernel space (possibly from kmap)
- * @src: source address in kernel logical memory
- * @len: length of data in bytes (may be less than PAGE_SIZE)
- *
- * Copy data into the address space of a process other than the current
- * process (eg for ptrace).
- */
void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long vaddr, void *dst, const void *src,
unsigned long len)
@@ -93,49 +81,28 @@ void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
}
}
-/*
- * copy_user_highpage
- * @to: destination page
- * @from: source page
- * @vaddr: address of pages in user address space
- * @vma: vm_area_struct holding the pages
- *
- * This is used in COW implementation to copy data from page @from to
- * page @to. @from was previousl mapped at @vaddr, and @to will be.
- * As this is used only in the COW implementation, this means that the
- * source is unmodified, and so we don't have to worry about cache
- * aliasing on that side.
- */
-#ifdef CONFIG_HIGHMEM
-/*
- * If we ever have a real highmem system, this code will need fixing
- * (as will clear_user/clear_user_highmem), because the kmap potentitally
- * creates another alias risk.
- */
-#error This code is broken with real HIGHMEM
-#endif
void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma)
{
void *vfrom, *vto;
vto = kmap_atomic(to, KM_USER1);
- vfrom = kmap_atomic(from, KM_USER0);
-
- if (pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
- __flush_invalidate_region(vto, PAGE_SIZE);
if (boot_cpu_data.dcache.n_aliases && page_mapped(from) &&
!test_bit(PG_dcache_dirty, &from->flags)) {
- void *vto_coloured = kmap_coherent(to, vaddr);
- copy_page(vto_coloured, vfrom);
- kunmap_coherent(vto_coloured);
- } else
+ vfrom = kmap_coherent(from, vaddr);
copy_page(vto, vfrom);
+ kunmap_coherent(vfrom);
+ } else {
+ vfrom = kmap_atomic(from, KM_USER0);
+ copy_page(vto, vfrom);
+ kunmap_atomic(vfrom, KM_USER0);
+ }
+
+ if (pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
+ __flush_purge_region(vto, PAGE_SIZE);
- kunmap_atomic(vfrom, KM_USER0);
kunmap_atomic(vto, KM_USER1);
-
/* Make sure this page is cleared on other CPU's too before using it */
smp_wmb();
}
@@ -145,17 +112,10 @@ void clear_user_highpage(struct page *page, unsigned long vaddr)
{
void *kaddr = kmap_atomic(page, KM_USER0);
- if (pages_do_alias((unsigned long)kaddr, vaddr & PAGE_MASK)) {
- void *vto;
+ clear_page(kaddr);
- /* Kernel alias may have modified data in the cache. */
- __flush_invalidate_region(kaddr, PAGE_SIZE);
-
- vto = kmap_coherent(page, vaddr);
- clear_page(vto);
- kunmap_coherent(vto);
- } else
- clear_page(kaddr);
+ if (pages_do_alias((unsigned long)kaddr, vaddr & PAGE_MASK))
+ __flush_purge_region(kaddr, PAGE_SIZE);
kunmap_atomic(kaddr, KM_USER0);
}
From a781d1e5ff6277f80ff3c9503775521bc64cf131 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@console-pimps.org>
Date: Fri, 4 Dec 2009 16:18:11 +0900
Subject: [PATCH 135/137] sh: Drop associative writes for SH-4 cache flushes.
When flushing/invalidating the icache/dcache via the memory-mapped IC/OC
address arrays, the associative bit should only be used in conjunction with
virtual addresses. However, we currently flush cache lines based on physical
address, so stop using the associative bit.
It is a better strategy to use non-associative writes (and physical tags) for
flushing the caches anyway, because flushing by virtual address (as with the
A-bit set) requires a valid TLB entry for that virtual address. If one does not
exist in the TLB no exception is generated and the flush is silently ignored.
This is also future-proofing for SH-4A parts which are gradually phasing out
associative writes to the cache array due to the aforementioned case of certain
flushes silently turning in to nops.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/mm/cache-sh4.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 6bfd08d5fb81..f36a08bf3d5c 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -98,7 +98,7 @@ static inline void flush_cache_one(unsigned long start, unsigned long phys)
exec_offset = cached_to_uncached;
local_irq_save(flags);
- __flush_cache_one(start | SH_CACHE_ASSOC, phys, exec_offset);
+ __flush_cache_one(start, phys, exec_offset);
local_irq_restore(flags);
}
@@ -123,7 +123,7 @@ static void sh4_flush_dcache_page(void *arg)
/* Loop all the D-cache */
n = boot_cpu_data.dcache.n_aliases;
- for (i = 0; i <= n; i++, addr += PAGE_SIZE)
+ for (i = 0; i < n; i++, addr += PAGE_SIZE)
flush_cache_one(addr, phys);
}
From 6e8a0d11a088ed51b1b649d3a1127a7bda3700a0 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 4 Dec 2009 16:22:11 +0900
Subject: [PATCH 136/137] sh: Make associative cache writes fatal on all SH-4A
parts.
Now that associative cache writes are no longer needed by the SH-4/SH-4A
cache flush code, associative write support can be explicitly disabled
for all SH-4A parts. This makes any associative write throw an exception,
as this behaviour can not be assumed to exist on future parts.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/cpu/init.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/arch/sh/kernel/cpu/init.c b/arch/sh/kernel/cpu/init.c
index ad9dfff9427c..89b4b76c0d76 100644
--- a/arch/sh/kernel/cpu/init.c
+++ b/arch/sh/kernel/cpu/init.c
@@ -75,16 +75,11 @@ static void __init expmask_init(void)
/*
* Future proofing.
*
- * Disable support for slottable sleep instruction
- * and non-nop instructions in the rte delay slot.
+ * Disable support for slottable sleep instruction, non-nop
+ * instructions in the rte delay slot, and associative writes to
+ * the memory-mapped cache array.
*/
- expmask &= ~(EXPMASK_RTEDS | EXPMASK_BRDSSLP);
-
- /*
- * Enable associative writes to the memory-mapped cache array
- * until the cache flush ops have been rewritten.
- */
- expmask |= EXPMASK_MMCAW;
+ expmask &= ~(EXPMASK_RTEDS | EXPMASK_BRDSSLP | EXPMASK_MMCAW);
__raw_writel(expmask, EXPMASK);
ctrl_barrier();
From 6a5a0b9139b19dd1a107870269a35bc9cf18d2dc Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@opensource.se>
Date: Fri, 4 Dec 2009 06:42:35 +0000
Subject: [PATCH 137/137] sh: include empty zero page in romImage
This patch updates the romImage code to include the
empty_zero_page contents from vmlinux. Without this
patch the empty zero page is lef uninitialized.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boot/romimage/Makefile | 12 ++++++++---
arch/sh/boot/romimage/head.S | 38 ++++++++++++++++++++++++++++++++++
2 files changed, 47 insertions(+), 3 deletions(-)
diff --git a/arch/sh/boot/romimage/Makefile b/arch/sh/boot/romimage/Makefile
index 5806eee84f6f..f473a24a2d92 100644
--- a/arch/sh/boot/romimage/Makefile
+++ b/arch/sh/boot/romimage/Makefile
@@ -4,16 +4,22 @@
# create an image suitable for burning to flash from zImage
#
-targets := vmlinux head.o
+targets := vmlinux head.o zeropage.bin piggy.o
OBJECTS = $(obj)/head.o
-LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext 0 -e romstart
+LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext 0 -e romstart \
+ -T $(obj)/../../kernel/vmlinux.lds
$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o FORCE
$(call if_changed,ld)
@:
+OBJCOPYFLAGS += -j .empty_zero_page
+
+$(obj)/zeropage.bin: vmlinux FORCE
+ $(call if_changed,objcopy)
+
LDFLAGS_piggy.o := -r --format binary --oformat $(ld-bfd) -T
-$(obj)/piggy.o: $(obj)/vmlinux.scr arch/sh/boot/zImage FORCE
+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/zeropage.bin arch/sh/boot/zImage FORCE
$(call if_changed,ld)
diff --git a/arch/sh/boot/romimage/head.S b/arch/sh/boot/romimage/head.S
index 219bc626dd71..93e779a405ec 100644
--- a/arch/sh/boot/romimage/head.S
+++ b/arch/sh/boot/romimage/head.S
@@ -5,6 +5,44 @@
*/
.text
+ #include <asm/page.h>
+
.global romstart
romstart:
+ /* include board specific setup code */
#include <mach/romimage.h>
+
+ /* copy the empty_zero_page contents to where vmlinux expects it */
+ mova empty_zero_page_src, r0
+ mov.l empty_zero_page_dst, r1
+ mov #(PAGE_SHIFT - 4), r4
+ mov #1, r3
+ shld r4, r3 /* r3 = PAGE_SIZE / 16 */
+
+1:
+ mov.l @r0, r4
+ mov.l @(4, r0), r5
+ mov.l @(8, r0), r6
+ mov.l @(12, r0), r7
+ add #16,r0
+ mov.l r4, @r1
+ mov.l r5, @(4, r1)
+ mov.l r6, @(8, r1)
+ mov.l r7, @(12, r1)
+ dt r3
+ add #16,r1
+ bf 1b
+
+ /* jump to the zImage entry point located after the zero page data */
+ mov #PAGE_SHIFT, r4
+ mov #1, r1
+ shld r4, r1
+ mova empty_zero_page_src, r0
+ add r1, r0
+ jmp @r0
+ nop
+
+ .align 2
+empty_zero_page_dst:
+ .long _text
+empty_zero_page_src: