| /* 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++; |
| } |
| } |
| |
| #endif |
