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microblaze: Implement flush_dcache_page macro 

flush_dcache_page macro is necessary to implement for
JFFS2 rootfs support on WB system.

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2010-06-04 13:00:31 +02:00
parent af58ed854b
commit 79e87830fa
1 changed files with 10 additions and 4 deletions
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14
arch/microblaze/include/asm/cacheflush.h
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@ -17,6 +17,7 @@
/* Somebody depends on this; sigh... */
#include <linux/mm.h>
#include <linux/io.h>
/* Look at Documentation/cachetlb.txt */
@ -60,7 +61,6 @@ void microblaze_cache_init(void);
#define invalidate_icache() mbc->iin();
#define invalidate_icache_range(start, end) mbc->iinr(start, end);
#define flush_icache_user_range(vma, pg, adr, len) flush_icache();
#define flush_icache_page(vma, pg) do { } while (0)
@ -72,9 +72,15 @@ void microblaze_cache_init(void);
#define flush_dcache() mbc->dfl();
#define flush_dcache_range(start, end) mbc->dflr(start, end);
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
/* D-cache aliasing problem can't happen - cache is between MMU and ram */
#define flush_dcache_page(page) do { } while (0)
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
/* MS: We have to implement it because of rootfs-jffs2 issue on WB */
#define flush_dcache_page(page) \
do { \
unsigned long addr = (unsigned long) page_address(page); /* virtual */ \
addr = (u32)virt_to_phys((void *)addr); \
flush_dcache_range((unsigned) (addr), (unsigned) (addr) + PAGE_SIZE); \
} while (0);
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)