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microblaze: PCI early support for noMMU system 

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2010-01-20 15:17:08 +01:00
parent 1be53e084a
commit 79bf3a1376
4 changed files with 18 additions and 6 deletions
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2
arch/microblaze/include/asm/pgalloc.h
View File

@ -19,6 +19,7 @@
#include <asm/io.h>
#include <asm/page.h>
#include <asm/cache.h>
#include <asm/pgtable.h>
#define PGDIR_ORDER 0
@ -111,7 +112,6 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
{
pte_t *pte;
extern int mem_init_done;
extern void *early_get_page(void);
if (mem_init_done) {
pte = (pte_t *)__get_free_page(GFP_KERNEL |

6
arch/microblaze/include/asm/pgtable.h
View File

@ -16,6 +16,10 @@
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
remap_pfn_range(vma, vaddr, pfn, size, prot)
#ifndef __ASSEMBLY__
extern int mem_init_done;
#endif
#ifndef CONFIG_MMU
#define pgd_present(pgd) (1) /* pages are always present on non MMU */
@ -51,6 +55,8 @@ static inline int pte_file(pte_t pte) { return 0; }
#define arch_enter_lazy_cpu_mode() do {} while (0)
#define pgprot_noncached_wc(prot) prot
#else /* CONFIG_MMU */
#include <asm-generic/4level-fixup.h>

14
arch/microblaze/mm/init.c
View File

@ -23,6 +23,9 @@
#include <asm/sections.h>
#include <asm/tlb.h>
/* Use for MMU and noMMU because of PCI generic code */
int mem_init_done;
#ifndef CONFIG_MMU
unsigned int __page_offset;
EXPORT_SYMBOL(__page_offset);
@ -30,7 +33,6 @@ EXPORT_SYMBOL(__page_offset);
#else
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
int mem_init_done;
static int init_bootmem_done;
#endif /* CONFIG_MMU */
@ -202,9 +204,7 @@ void __init mem_init(void)
printk(KERN_INFO "Memory: %luk/%luk available\n",
nr_free_pages() << (PAGE_SHIFT-10),
num_physpages << (PAGE_SHIFT-10));
#ifdef CONFIG_MMU
mem_init_done = 1;
#endif
}
#ifndef CONFIG_MMU
@ -216,6 +216,10 @@ int ___range_ok(unsigned long addr, unsigned long size)
}
EXPORT_SYMBOL(___range_ok);
int page_is_ram(unsigned long pfn)
{
return __range_ok(pfn, 0);
}
#else
int page_is_ram(unsigned long pfn)
{
@ -344,6 +348,8 @@ void __init *early_get_page(void)
return p;
}
#endif /* CONFIG_MMU */
void * __init_refok alloc_maybe_bootmem(size_t size, gfp_t mask)
{
if (mem_init_done)
@ -365,5 +371,3 @@ void * __init_refok zalloc_maybe_bootmem(size_t size, gfp_t mask)
}
return p;
}
#endif /* CONFIG_MMU */

2
arch/microblaze/pci/pci-common.c
View File

@ -561,11 +561,13 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus,
* memory, effectively behaving just like /dev/zero
*/
if ((offset + size) > hose->isa_mem_size) {
#ifdef CONFIG_MMU
printk(KERN_DEBUG
"Process %s (pid:%d) mapped non-existing PCI"
"legacy memory for 0%04x:%02x\n",
current->comm, current->pid, pci_domain_nr(bus),
bus->number);
#endif
if (vma->vm_flags & VM_SHARED)
return shmem_zero_setup(vma);
return 0;