---

yaml
---
r: 62996
b: refs/heads/master
c: 39c2965
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d4c1465b7de9686c4c5aa533b15c09ab014aab3a
+refs/heads/master: 39c29657fcf6060d71e04f1e52e5bb4b2999644f

trunk/include/asm-mips/edac.h

@@ -0,0 +1,35 @@
+#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 long *virt_addr = va;
+	unsigned long temp;
+	u32 i;
+
+	for (i = 0; i < size / sizeof(unsigned long); i++, virt_addr++) {
+
+		/*
+		 * Very carefully read and write to memory atomically
+		 * so we are interrupt, DMA and SMP safe.
+		 *
+		 * Intel: asm("lock; addl $0, %0"::"m"(*virt_addr));
+		 */
+
+		__asm__ __volatile__ (
+		"       .set    mips3                                   \n"
+		"1:     ll      %0, %1          # atomic_add            \n"
+		"       ll      %0, %1          # atomic_add            \n"
+		"       addu    %0, $0                                  \n"
+		"       sc      %0, %1                                  \n"
+		"       beqz    %0, 1b                                  \n"
+		"       .set    mips0                                   \n"
+		: "=&r" (temp), "=m" (*virt_addr)
+		: "m" (*virt_addr));
+
+	}
+}
+
+#endif