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| author | Jens Axboe <jens.axboe@oracle.com> | 2009-11-03 21:14:39 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-11-03 21:14:39 +0100 |
| commit | 2058297d2d045cb57138c33b87cfabcc80e65186 (patch) | |
| tree | 7ccffd0e162cbd7471f643561e79f23abb989a62 /arch/arm/mm/cache-v7.S | |
| parent | 150e6c67f4bf6ab51e62defc41bd19a2eefe5709 (diff) | |
| parent | 4b27e1bb442e964903f8a3fa6bdf33a602dc0941 (diff) | |
Merge branch 'for-linus' into for-2.6.33
Conflicts:
block/cfq-iosched.c
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'arch/arm/mm/cache-v7.S')
| -rw-r--r-- | arch/arm/mm/cache-v7.S | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S index bda0ec31a4e..e1bd9759617 100644 --- a/arch/arm/mm/cache-v7.S +++ b/arch/arm/mm/cache-v7.S @@ -13,6 +13,7 @@ #include <linux/linkage.h> #include <linux/init.h> #include <asm/assembler.h> +#include <asm/unwind.h> #include "proc-macros.S" @@ -153,13 +154,16 @@ ENTRY(v7_coherent_kern_range) * - the Icache does not read data from the write buffer */ ENTRY(v7_coherent_user_range) + UNWIND(.fnstart ) dcache_line_size r2, r3 sub r3, r2, #1 bic r0, r0, r3 -1: mcr p15, 0, r0, c7, c11, 1 @ clean D line to the point of unification +1: + USER( mcr p15, 0, r0, c7, c11, 1 ) @ clean D line to the point of unification dsb - mcr p15, 0, r0, c7, c5, 1 @ invalidate I line + USER( mcr p15, 0, r0, c7, c5, 1 ) @ invalidate I line add r0, r0, r2 +2: cmp r0, r1 blo 1b mov r0, #0 @@ -167,6 +171,17 @@ ENTRY(v7_coherent_user_range) dsb isb mov pc, lr + +/* + * Fault handling for the cache operation above. If the virtual address in r0 + * isn't mapped, just try the next page. + */ +9001: + mov r0, r0, lsr #12 + mov r0, r0, lsl #12 + add r0, r0, #4096 + b 2b + UNWIND(.fnend ) ENDPROC(v7_coherent_kern_range) ENDPROC(v7_coherent_user_range) |