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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-05-07 16:22:40 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-05-08 12:42:34 +0300 |
| commit | 7ddfe625cbc14c83153c78aacd52a20c5805920e (patch) | |
| tree | 7c83f76f042609dcc8ad8bd221a738eaad3d79ab | |
| parent | 7d485f647c1f4a6976264c90447fb0dbf07b111d (diff) | |
| download | linux-7ddfe625cbc14c83153c78aacd52a20c5805920e.tar.xz | |
ARM: optimize memset_io()/memcpy_fromio()/memcpy_toio()
If we are building for a LE platform, and we haven't overriden the
MMIO ops, then we can optimize the mem*io operations using the
standard string functions.
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/include/asm/io.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h index 7744e58bca38..addfb3dd095f 100644 --- a/arch/arm/include/asm/io.h +++ b/arch/arm/include/asm/io.h @@ -23,6 +23,7 @@ #ifdef __KERNEL__ +#include <linux/string.h> #include <linux/types.h> #include <linux/blk_types.h> #include <asm/byteorder.h> @@ -316,9 +317,33 @@ extern void _memset_io(volatile void __iomem *, int, size_t); #define writesw(p,d,l) __raw_writesw(p,d,l) #define writesl(p,d,l) __raw_writesl(p,d,l) +#ifndef __ARMBE__ +static inline void memset_io(volatile void __iomem *dst, unsigned c, + size_t count) +{ + memset((void __force *)dst, c, count); +} +#define memset_io(dst,c,count) memset_io(dst,c,count) + +static inline void memcpy_fromio(void *to, const volatile void __iomem *from, + size_t count) +{ + memcpy(to, (const void __force *)from, count); +} +#define memcpy_fromio(to,from,count) memcpy_fromio(to,from,count) + +static inline void memcpy_toio(volatile void __iomem *to, const void *from, + size_t count) +{ + memcpy((void __force *)to, from, count); +} +#define memcpy_toio(to,from,count) memcpy_toio(to,from,count) + +#else #define memset_io(c,v,l) _memset_io(c,(v),(l)) #define memcpy_fromio(a,c,l) _memcpy_fromio((a),c,(l)) #define memcpy_toio(c,a,l) _memcpy_toio(c,(a),(l)) +#endif #endif /* readl */ |