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ARC: [mm] consolidate icache/dcache sync code 

Now that we have same helper used for all icache invalidates (i.e.
vaddr+paddr based exact line invalidate), consolidate the open coded
calls into one place.

Also rename flush_icache_range_vaddr => __sync_icache_dcache

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2013-04-12 12:20:23 +05:30
parent 7586bf7286
commit 94bad1afee
2 changed files with 18 additions and 19 deletions
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5
arch/arc/include/asm/cacheflush.h
View File

@ -31,8 +31,7 @@
void flush_cache_all(void);
void flush_icache_range(unsigned long start, unsigned long end);
void flush_icache_range_vaddr(unsigned long paddr, unsigned long u_vaddr,
int len);
void __sync_icache_dcache(unsigned long paddr, unsigned long vaddr, int len);
void __inv_icache_page(unsigned long paddr, unsigned long vaddr);
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
@ -66,7 +65,7 @@ void dma_cache_wback(unsigned long start, unsigned long sz);
do { \
memcpy(dst, src, len); \
if (vma->vm_flags & VM_EXEC) \
flush_icache_range_vaddr((unsigned long)(dst), vaddr, len);\
__sync_icache_dcache((unsigned long)(dst), vaddr, len); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \

32
arch/arc/mm/cache_arc700.c
View File

@ -652,7 +652,6 @@ void flush_icache_range(unsigned long kstart, unsigned long kend)
{
unsigned int tot_sz, off, sz;
unsigned long phy, pfn;
unsigned long flags;
/* printk("Kernel Cache Cohenercy: %lx to %lx\n",kstart, kend); */
@ -679,8 +678,7 @@ void flush_icache_range(unsigned long kstart, unsigned long kend)
* given the callers for this case: kprobe/kgdb in built-in
* kernel code only.
*/
__ic_line_inv_vaddr(kstart, kstart, kend - kstart);
__dc_line_op(kstart, kend - kstart, OP_FLUSH);
__sync_icache_dcache(kstart, kstart, kend - kstart);
return;
}
@ -698,28 +696,30 @@ void flush_icache_range(unsigned long kstart, unsigned long kend)
pfn = vmalloc_to_pfn((void *)kstart);
phy = (pfn << PAGE_SHIFT) + off;
sz = min_t(unsigned int, tot_sz, PAGE_SIZE - off);
local_irq_save(flags);
__dc_line_op(phy, sz, OP_FLUSH);
__ic_line_inv_vaddr(phy, kstart, sz);
local_irq_restore(flags);
__sync_icache_dcache(phy, kstart, sz);
kstart += sz;
tot_sz -= sz;
}
}
/*
* Optimised ver of flush_icache_range() with spec callers: ptrace/signals
* where vaddr is also available. This allows passing both vaddr and paddr
* bits to CDU for cache flush, short-circuting the current pessimistic algo
* which kills all possible aliases.
* An added adv of knowing that vaddr is user-vaddr avoids various checks
* and handling for k-vaddr, k-paddr as done in orig ver above
* General purpose helper to make I and D cache lines consistent.
* @paddr is phy addr of region
* @vaddr is typically user or kernel vaddr (vmalloc)
* Howver in one instance, flush_icache_range() by kprobe (for a breakpt in
* builtin kernel code) @vaddr will be paddr only, meaning CDU operation will
* use a paddr to index the cache (despite VIPT). This is fine since since a
* built-in kernel page will not have any virtual mappings (not even kernel)
* kprobe on loadable module is different as it will have kvaddr.
*/
void flush_icache_range_vaddr(unsigned long paddr, unsigned long u_vaddr,
int len)
void __sync_icache_dcache(unsigned long paddr, unsigned long vaddr, int len)
{
__ic_line_inv_vaddr(paddr, u_vaddr, len);
unsigned long flags;
local_irq_save(flags);
__ic_line_inv_vaddr(paddr, vaddr, len);
__dc_line_op(paddr, len, OP_FLUSH);
local_irq_restore(flags);
}
/* wrapper to compile time eliminate alignment checks in flush loop */