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| author | Kevin O'Connor <kevin@koconnor.net> | 2017-01-23 11:13:19 -0500 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2017-02-02 10:46:42 -0500 |
| commit | 5beceaae5c57dcf1b92d1def5954ac331a19a63a (patch) | |
| tree | 17f394911623c9854b29329be532a1aedde857f2 /src/generic/io.h | |
| parent | 9c1bf1387c90ab7d5937bb210730acad10a4ba19 (diff) | |
| download | kutter-5beceaae5c57dcf1b92d1def5954ac331a19a63a.tar.gz kutter-5beceaae5c57dcf1b92d1def5954ac331a19a63a.tar.xz kutter-5beceaae5c57dcf1b92d1def5954ac331a19a63a.zip | |
io.h: read/write[bwl] should use barrier
Add barrier() calls to low-level read/write io calls so that their
callers don't need to.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/generic/io.h')
| -rw-r--r-- | src/generic/io.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/generic/io.h b/src/generic/io.h index 2a16cf20..12bbd489 100644 --- a/src/generic/io.h +++ b/src/generic/io.h @@ -2,24 +2,34 @@ #define __GENERIC_IO_H #include <stdint.h> // uint32_t +#include "compiler.h" // barrier static inline void writel(void *addr, uint32_t val) { + barrier(); *(volatile uint32_t *)addr = val; } static inline void writew(void *addr, uint16_t val) { + barrier(); *(volatile uint16_t *)addr = val; } static inline void writeb(void *addr, uint8_t val) { + barrier(); *(volatile uint8_t *)addr = val; } static inline uint32_t readl(const void *addr) { - return *(volatile const uint32_t *)addr; + uint32_t val = *(volatile const uint32_t *)addr; + barrier(); + return val; } static inline uint16_t readw(const void *addr) { - return *(volatile const uint16_t *)addr; + uint16_t val = *(volatile const uint16_t *)addr; + barrier(); + return val; } static inline uint8_t readb(const void *addr) { - return *(volatile const uint8_t *)addr; + uint8_t val = *(volatile const uint8_t *)addr; + barrier(); + return val; } #endif // io.h |