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38 lines
839 B
38 lines
839 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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#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 edac_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 push \n" |
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" .set mips2 \n" |
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"1: ll %0, %1 # edac_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 pop \n" |
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: "=&r" (temp), "=" GCC_OFF_SMALL_ASM() (*virt_addr) |
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: GCC_OFF_SMALL_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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