diff options
Diffstat (limited to 'include/asm-x86_64/edac.h')
| -rw-r--r-- | include/asm-x86_64/edac.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/asm-x86_64/edac.h b/include/asm-x86_64/edac.h new file mode 100644 index 000000000000..cad1cd42b4ee --- /dev/null +++ b/include/asm-x86_64/edac.h @@ -0,0 +1,18 @@ +#ifndef ASM_EDAC_H +#define ASM_EDAC_H + +/* ECC atomic, DMA, SMP and interrupt safe scrub function */ + +static __inline__ void atomic_scrub(void *va, u32 size) +{ + unsigned int *virt_addr = va; + u32 i; + + for (i = 0; i < size / 4; i++, virt_addr++) + /* Very carefully read and write to memory atomically + * so we are interrupt, DMA and SMP safe. + */ + __asm__ __volatile__("lock; addl $0, %0"::"m"(*virt_addr)); +} + +#endif |