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Diffstat (limited to 'kernel/arch/x86/include/asm/edac.h')
-rw-r--r--kernel/arch/x86/include/asm/edac.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/arch/x86/include/asm/edac.h b/kernel/arch/x86/include/asm/edac.h
new file mode 100644
index 000000000..e9b57ecc7
--- /dev/null
+++ b/kernel/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 */