aboutsummaryrefslogtreecommitdiff
path: root/include/asm-x86_64/edac.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-x86_64/edac.h')
-rw-r--r--include/asm-x86_64/edac.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/asm-x86_64/edac.h b/include/asm-x86_64/edac.h
new file mode 100644
index 00000000000..cad1cd42b4e
--- /dev/null
+++ b/include/asm-x86_64/edac.h
@@ -0,0 +1,18 @@
+#ifndef ASM_EDAC_H
+#define ASM_EDAC_H
+
+/* ECC atomic, DMA, SMP and interrupt safe scrub function */
+
+static __inline__ void atomic_scrub(void *va, u32 size)
+{
+ unsigned int *virt_addr = va;
+ u32 i;
+
+ for (i = 0; i < size / 4; i++, virt_addr++)
+ /* Very carefully read and write to memory atomically
+ * so we are interrupt, DMA and SMP safe.
+ */
+ __asm__ __volatile__("lock; addl $0, %0"::"m"(*virt_addr));
+}
+
+#endif