Commit | Line | Data |
---|---|---|
39c29657 DT |
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 | unsigned long temp; | |
10 | u32 i; | |
11 | ||
1bfa771e | 12 | for (i = 0; i < size / sizeof(unsigned long); i++) { |
39c29657 DT |
13 | /* |
14 | * Very carefully read and write to memory atomically | |
15 | * so we are interrupt, DMA and SMP safe. | |
16 | * | |
17 | * Intel: asm("lock; addl $0, %0"::"m"(*virt_addr)); | |
18 | */ | |
19 | ||
20 | __asm__ __volatile__ ( | |
1bfa771e RB |
21 | " .set mips2 \n" |
22 | "1: ll %0, %1 # atomic_scrub \n" | |
23 | " addu %0, $0 \n" | |
24 | " sc %0, %1 \n" | |
25 | " beqz %0, 1b \n" | |
26 | " .set mips0 \n" | |
39c29657 DT |
27 | : "=&r" (temp), "=m" (*virt_addr) |
28 | : "m" (*virt_addr)); | |
29 | ||
1bfa771e | 30 | virt_addr++; |
39c29657 DT |
31 | } |
32 | } | |
33 | ||
34 | #endif |