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//usr/src/linux-headers-5.4.0-216/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 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