| /* | |
| * PPC EDAC common defs | |
| * | |
| * Author: Dave Jiang <djiang@mvista.com> | |
| * | |
| * 2007 (c) MontaVista Software, Inc. This file is licensed under | |
| * the terms of the GNU General Public License version 2. This program | |
| * is licensed "as is" without any warranty of any kind, whether express | |
| * or implied. | |
| */ | |
| #ifndef ASM_EDAC_H | |
| #define ASM_EDAC_H | |
| /* | |
| * ECC atomic, DMA, SMP and interrupt safe scrub function. | |
| * Implements the per arch edac_atomic_scrub() that EDAC use for software | |
| * ECC scrubbing. It reads memory and then writes back the original | |
| * value, allowing the hardware to detect and correct memory errors. | |
| */ | |
| static __inline__ void edac_atomic_scrub(void *va, u32 size) | |
| { | |
| unsigned int *virt_addr = va; | |
| unsigned int temp; | |
| unsigned int i; | |
| for (i = 0; i < size / sizeof(*virt_addr); i++, virt_addr++) { | |
| /* Very carefully read and write to memory atomically | |
| * so we are interrupt, DMA and SMP safe. | |
| */ | |
| __asm__ __volatile__ ("\n\ | |
| 1: lwarx %0,0,%1\n\ | |
| stwcx. %0,0,%1\n\ | |
| bne- 1b\n\ | |
| isync" | |
| : "=&r"(temp) | |
| : "r"(virt_addr) | |
| : "cr0", "memory"); | |
| } | |
| } | |
| #endif |