Release 4.14 arch/mips/include/asm/edac.h

/* 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    mips2                                   \n"
                "1:     ll      %0, %1          # edac_atomic_scrub     \n"
                "       addu    %0, $0                                  \n"
                "       sc      %0, %1                                  \n"
                "       beqz    %0, 1b                                  \n"
                "       .set    mips0                                   \n"
                : "=&r" (temp), "=" GCC_OFF_SMALL_ASM() (*virt_addr)
                : GCC_OFF_SMALL_ASM() (*virt_addr));

		virt_addr++;
	}
}

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Doug Thompson
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#endif
Overall Contributors
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Doug Thompson
60
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1
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Maciej W. Rozycki
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1
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Ralf Bächle
3
4.35%
1
20.00%
Borislav Petkov
2
2.90%
1
20.00%
Greg Kroah-Hartman
1
1.45%
1
20.00%
Total
69
100.00%
5
100.00%
Directory: arch/mips/include/asm

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