162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */
262306a36Sopenharmony_ci#ifndef _ASM_X86_EDAC_H
362306a36Sopenharmony_ci#define _ASM_X86_EDAC_H
462306a36Sopenharmony_ci
562306a36Sopenharmony_ci/* ECC atomic, DMA, SMP and interrupt safe scrub function */
662306a36Sopenharmony_ci
762306a36Sopenharmony_cistatic inline void edac_atomic_scrub(void *va, u32 size)
862306a36Sopenharmony_ci{
962306a36Sopenharmony_ci	u32 i, *virt_addr = va;
1062306a36Sopenharmony_ci
1162306a36Sopenharmony_ci	/*
1262306a36Sopenharmony_ci	 * Very carefully read and write to memory atomically so we
1362306a36Sopenharmony_ci	 * are interrupt, DMA and SMP safe.
1462306a36Sopenharmony_ci	 */
1562306a36Sopenharmony_ci	for (i = 0; i < size / 4; i++, virt_addr++)
1662306a36Sopenharmony_ci		asm volatile("lock; addl $0, %0"::"m" (*virt_addr));
1762306a36Sopenharmony_ci}
1862306a36Sopenharmony_ci
1962306a36Sopenharmony_ci#endif /* _ASM_X86_EDAC_H */
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