diff options
Diffstat (limited to 'arch/x86/include/asm/edac.h')
| -rw-r--r-- | arch/x86/include/asm/edac.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/include/asm/edac.h b/arch/x86/include/asm/edac.h new file mode 100644 index 000000000000..9493c5b27bbd --- /dev/null +++ b/arch/x86/include/asm/edac.h @@ -0,0 +1,18 @@ +#ifndef ASM_X86__EDAC_H +#define ASM_X86__EDAC_H + +/* ECC atomic, DMA, SMP and interrupt safe scrub function */ + +static inline void atomic_scrub(void *va, u32 size) +{ + u32 i, *virt_addr = va; + + /* + * Very carefully read and write to memory atomically so we + * are interrupt, DMA and SMP safe. + */ + for (i = 0; i < size / 4; i++, virt_addr++) + asm volatile("lock; addl $0, %0"::"m" (*virt_addr)); +} + +#endif /* ASM_X86__EDAC_H */ |