diff options
Diffstat (limited to 'arch/x86/include/asm/io.h')
| -rw-r--r-- | arch/x86/include/asm/io.h | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index 9b757d489e..86bac90e8e 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -1,6 +1,8 @@ #ifndef _ASM_IO_H #define _ASM_IO_H +#include <compiler.h> + /* * This file contains the definitions for the x86 IO instructions * inb/inw/inl/outb/outw/outl and the "string versions" of the same @@ -36,6 +38,8 @@ #define IO_SPACE_LIMIT 0xffff +#include <asm/types.h> + #ifdef __KERNEL__ @@ -135,7 +139,7 @@ out: #ifdef SLOW_IO_BY_JUMPING #define __SLOW_DOWN_IO "\njmp 1f\n1:\tjmp 1f\n1:" #else -#define __SLOW_DOWN_IO "\noutb %%al,$0x80" +#define __SLOW_DOWN_IO "\noutb %%al,$0xed" #endif #ifdef REALLY_SLOW_IO @@ -218,7 +222,7 @@ static inline void sync(void) static inline void * map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) { - return (void *)paddr; + return (void *)(uintptr_t)paddr; } /* @@ -231,7 +235,15 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags) static inline phys_addr_t virt_to_phys(void * vaddr) { - return (phys_addr_t)(vaddr); + return (phys_addr_t)(uintptr_t)(vaddr); } +/* + * TODO: The kernel offers some more advanced versions of barriers, it might + * have some advantages to use them instead of the simple one here. + */ +#define dmb() __asm__ __volatile__ ("" : : : "memory") +#define __iormb() dmb() +#define __iowmb() dmb() + #endif |