summaryrefslogtreecommitdiffstats
path: root/arch/x86/include/asm/edac.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/include/asm/edac.h')
-rw-r--r--arch/x86/include/asm/edac.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/include/asm/edac.h b/arch/x86/include/asm/edac.h
new file mode 100644
index 000000000000..9493c5b27bbd
--- /dev/null
+++ b/arch/x86/include/asm/edac.h
@@ -0,0 +1,18 @@
+#ifndef ASM_X86__EDAC_H
+#define ASM_X86__EDAC_H
+
+/* ECC atomic, DMA, SMP and interrupt safe scrub function */
+
+static inline void atomic_scrub(void *va, u32 size)
+{
+ u32 i, *virt_addr = va;
+
+ /*
+ * Very carefully read and write to memory atomically so we
+ * are interrupt, DMA and SMP safe.
+ */
+ for (i = 0; i < size / 4; i++, virt_addr++)
+ asm volatile("lock; addl $0, %0"::"m" (*virt_addr));
+}
+
+#endif /* ASM_X86__EDAC_H */