| Alan Cox | da9bb1d | 2006-01-18 17:44:13 -0800 | [diff] [blame] | 1 | #ifndef ASM_EDAC_H |
| 2 | #define ASM_EDAC_H | ||||
| 3 | |||||
| 4 | /* ECC atomic, DMA, SMP and interrupt safe scrub function */ | ||||
| 5 | |||||
| 6 | static __inline__ void atomic_scrub(void *va, u32 size) | ||||
| 7 | { | ||||
| 8 | unsigned long *virt_addr = va; | ||||
| 9 | u32 i; | ||||
| 10 | |||||
| 11 | for (i = 0; i < size / 4; i++, virt_addr++) | ||||
| 12 | /* Very carefully read and write to memory atomically | ||||
| 13 | * so we are interrupt, DMA and SMP safe. | ||||
| 14 | */ | ||||
| 15 | __asm__ __volatile__("lock; addl $0, %0"::"m"(*virt_addr)); | ||||
| 16 | } | ||||
| 17 | |||||
| 18 | #endif | ||||