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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ASM_EDAC_H
#define ASM_EDAC_H
#include <asm/compiler.h>
/* ECC atomic, DMA, SMP and interrupt safe scrub function */
static inline void edac_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 push \n"
" .set mips2 \n"
"1: ll %0, %1 # edac_atomic_scrub \n"
" addu %0, $0 \n"
" sc %0, %1 \n"
" beqz %0, 1b \n"
" .set pop \n"
: "=&r" (temp), "=" GCC_OFF_SMALL_ASM() (*virt_addr)
: GCC_OFF_SMALL_ASM() (*virt_addr));
virt_addr++;
}
}
#endif
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