home *** CD-ROM | disk | FTP | other *** search
- #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 long *virt_addr = va;
- unsigned long temp;
- u32 i;
-
- for (i = 0; i < size / sizeof(unsigned long); i++) {
- /*
- * Very carefully read and write to memory atomically
- * so we are interrupt, DMA and SMP safe.
- *
- * Intel: asm("lock; addl $0, %0"::"m"(*virt_addr));
- */
-
- __asm__ __volatile__ (
- " .set mips2 \n"
- "1: ll %0, %1 # atomic_scrub \n"
- " addu %0, $0 \n"
- " sc %0, %1 \n"
- " beqz %0, 1b \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (*virt_addr)
- : "m" (*virt_addr));
-
- virt_addr++;
- }
- }
-
- #endif
-