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authorRalf Baechle <ralf@linux-mips.org>2008-09-16 13:48:51 -0400
committerRalf Baechle <ralf@linux-mips.org>2008-10-11 11:18:52 -0400
commit384740dc49ea651ba350704d13ff6be9976e37fe (patch)
treea6e80cad287ccae7a86d81bfa692fc96889c88ed /arch/mips/include/asm/edac.h
parente8c7c482347574ecdd45c43e32c332d5fc2ece61 (diff)
MIPS: Move headfiles to new location below arch/mips/include
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/edac.h')
-rw-r--r--arch/mips/include/asm/edac.h34
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/mips/include/asm/edac.h b/arch/mips/include/asm/edac.h
new file mode 100644
index 000000000000..4da0c1fe30d9
--- /dev/null
+++ b/arch/mips/include/asm/edac.h
@@ -0,0 +1,34 @@
1#ifndef ASM_EDAC_H
2#define ASM_EDAC_H
3
4/* ECC atomic, DMA, SMP and interrupt safe scrub function */
5
6static inline void atomic_scrub(void *va, u32 size)
7{
8 unsigned long *virt_addr = va;
9 unsigned long temp;
10 u32 i;
11
12 for (i = 0; i < size / sizeof(unsigned long); i++) {
13 /*
14 * Very carefully read and write to memory atomically
15 * so we are interrupt, DMA and SMP safe.
16 *
17 * Intel: asm("lock; addl $0, %0"::"m"(*virt_addr));
18 */
19
20 __asm__ __volatile__ (
21 " .set mips2 \n"
22 "1: ll %0, %1 # atomic_scrub \n"
23 " addu %0, $0 \n"
24 " sc %0, %1 \n"
25 " beqz %0, 1b \n"
26 " .set mips0 \n"
27 : "=&r" (temp), "=m" (*virt_addr)
28 : "m" (*virt_addr));
29
30 virt_addr++;
31 }
32}
33
34#endif