1 /* SPDX-License-Identifier: GPL-2.0-only */ 1
2 /*
3 * Copyright 2011 Calxeda, Inc.
4 * Based on PPC version Copyright 2007 MontaVi
5 */
6 #ifndef ASM_EDAC_H
7 #define ASM_EDAC_H
8 /*
9 * ECC atomic, DMA, SMP and interrupt safe scr
10 * Implements the per arch edac_atomic_scrub()
11 * ECC scrubbing. It reads memory and then wr
12 * value, allowing the hardware to detect and
13 */
14
15 static inline void edac_atomic_scrub(void *va,
16 {
17 #if __LINUX_ARM_ARCH__ >= 6
18 unsigned int *virt_addr = va;
19 unsigned int temp, temp2;
20 unsigned int i;
21
22 for (i = 0; i < size / sizeof(*virt_ad
23 /* Very carefully read and wri
24 * so we are interrupt, DMA an
25 */
26 __asm__ __volatile__("\n"
27 "1: ldrex %0, [%
28 " strex %1, %0
29 " teq %1, #0
30 " bne 1b\n"
31 : "=&r"(temp), "=&r"(t
32 : "r"(virt_addr)
33 : "cc");
34 }
35 #endif
36 }
37
38 #endif
39
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