diff options
| author | Hung-Te Lin <hungte@chromium.org> | 2013-06-12 15:01:56 -0700 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2013-07-10 22:36:33 +0200 |
| commit | 2867060098e4023a2d33d335afe49981584ec378 (patch) | |
| tree | 19aeb644b9fbf46660aebc0e8c1c24f6787cece9 /src/arch | |
| parent | 83fd23925509026734833c9d8d28890029899458 (diff) | |
arm: Fix memory barrier usage in IO operation
The dmb should be executed before reading operations, and before/after writing
operations.
Change-Id: I572136a2f9a07eb2c38a112f5deeb2de0c0fd46c
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3682
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/armv7/include/arch/io.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/arch/armv7/include/arch/io.h b/src/arch/armv7/include/arch/io.h index b4932dc52a..be1da51c71 100644 --- a/src/arch/armv7/include/arch/io.h +++ b/src/arch/armv7/include/arch/io.h @@ -29,41 +29,41 @@ static inline uint8_t read8(const void *addr) { - uint8_t v = *(volatile uint8_t *)addr; dmb(); - return v; + return *(volatile uint8_t *)addr; } static inline uint16_t read16(const void *addr) { - uint16_t v = *(volatile uint16_t *)addr; dmb(); - return v; + return *(volatile uint16_t *)addr; } static inline uint32_t read32(const void *addr) { - uint32_t v = *(volatile uint32_t *)addr; dmb(); - return v; + return *(volatile uint32_t *)addr; } static inline void write8(uint8_t val, const void *addr) { dmb(); *(volatile uint8_t *)addr = val; + dmb(); } static inline void write16(uint16_t val, const void *addr) { dmb(); *(volatile uint16_t *)addr = val; + dmb(); } static inline void write32(uint32_t val, const void *addr) { dmb(); *(volatile uint32_t *)addr = val; + dmb(); } /* |