35 lines
709 B
C
35 lines
709 B
C
|
#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
|