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| author | Michal Simek <monstr@monstr.eu> | 2010-06-04 13:00:31 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-08-04 10:22:09 +0200 |
| commit | 79e87830faf22ca636b1a1d8f4deb430ea6e1c8b (patch) | |
| tree | f04b2faabbb1c573382dbad541f96ba2a1419d52 | |
| parent | af58ed854bf7d233988ae037e19f5d89335e0ecc (diff) | |
| download | lwn-79e87830faf22ca636b1a1d8f4deb430ea6e1c8b.tar.gz lwn-79e87830faf22ca636b1a1d8f4deb430ea6e1c8b.zip | |
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>
| -rw-r--r-- | arch/microblaze/include/asm/cacheflush.h | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/microblaze/include/asm/cacheflush.h b/arch/microblaze/include/asm/cacheflush.h index a6edd356cd08..e9bb567e1b0e 100644 --- a/arch/microblaze/include/asm/cacheflush.h +++ b/arch/microblaze/include/asm/cacheflush.h @@ -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) |