mirror of https://gitee.com/openkylin/linux.git
37 lines
763 B
C
37 lines
763 B
C
#ifndef ASM_EDAC_H
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#define ASM_EDAC_H
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#include <asm/compiler.h>
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/* ECC atomic, DMA, SMP and interrupt safe scrub function */
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static inline void atomic_scrub(void *va, u32 size)
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{
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unsigned long *virt_addr = va;
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unsigned long temp;
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u32 i;
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for (i = 0; i < size / sizeof(unsigned long); i++) {
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/*
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* Very carefully read and write to memory atomically
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* so we are interrupt, DMA and SMP safe.
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*
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* Intel: asm("lock; addl $0, %0"::"m"(*virt_addr));
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*/
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__asm__ __volatile__ (
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" .set mips2 \n"
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"1: ll %0, %1 # atomic_scrub \n"
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" addu %0, $0 \n"
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" sc %0, %1 \n"
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" beqz %0, 1b \n"
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" .set mips0 \n"
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: "=&r" (temp), "=" GCC_OFF12_ASM() (*virt_addr)
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: GCC_OFF12_ASM() (*virt_addr));
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virt_addr++;
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}
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}
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#endif
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