Add readq() and writeq() definitions for x86.
Please note: in 32-bit code readq/writeq will generate two 32-bit memory access instructions instead of one atomic 64-bit operation.
Signed-off-by: Ivan Gorinov ivan.gorinov@intel.com --- arch/x86/include/asm/io.h | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index 263dd8f..c7f6fcb 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -58,19 +58,23 @@ * memory location directly. */
-#define readb(addr) (*(volatile unsigned char *) (addr)) -#define readw(addr) (*(volatile unsigned short *) (addr)) -#define readl(addr) (*(volatile unsigned int *) (addr)) +#define readb(addr) (*(volatile u8 *) (addr)) +#define readw(addr) (*(volatile u16 *) (addr)) +#define readl(addr) (*(volatile u32 *) (addr)) +#define readq(addr) (*(volatile u64 *) (addr)) #define __raw_readb readb #define __raw_readw readw #define __raw_readl readl +#define __raw_readq readq
-#define writeb(b,addr) (*(volatile unsigned char *) (addr) = (b)) -#define writew(b,addr) (*(volatile unsigned short *) (addr) = (b)) -#define writel(b,addr) (*(volatile unsigned int *) (addr) = (b)) +#define writeb(b, addr) (*(volatile u8 *) (addr) = (b)) +#define writew(b, addr) (*(volatile u16 *) (addr) = (b)) +#define writel(b, addr) (*(volatile u32 *) (addr) = (b)) +#define writeq(b, addr) (*(volatile u64 *) (addr) = (b)) #define __raw_writeb writeb #define __raw_writew writew #define __raw_writel writel +#define __raw_writeq writeq
#define memset_io(a,b,c) memset((a),(b),(c)) #define memcpy_fromio(a,b,c) memcpy((a),(b),(c))