From 24b0d2effdb8575faa28c95b65830070e034b86e Mon Sep 17 00:00:00 2001
From: Oleksij Rempel <linux@rempel-privat.de>
Date: Wed, 19 Jun 2013 11:11:28 +0200
Subject: [PATCH] MIPS: pbl: add pbl_probe_mem macro

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/mips/include/asm/pbl_macros.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/mips/include/asm/pbl_macros.h b/arch/mips/include/asm/pbl_macros.h
index fde94348b..1d9d6ab7e 100644
--- a/arch/mips/include/asm/pbl_macros.h
+++ b/arch/mips/include/asm/pbl_macros.h
@@ -38,6 +38,18 @@
 	.set	pop
 	.endm
 
+	.macro	pbl_probe_mem ret1 ret2 addr
+	.set	push
+	.set	noreorder
+	la	\ret1, \addr
+	sw	zero, 0(\ret1)
+	li	\ret2, 0x12345678
+	sw	\ret2, 0(\ret1)
+	lw	\ret2, 0(\ret1)
+	li	\ret1, 0x12345678
+	.set	pop
+	.endm
+
 	/*
 	 * ADR macro instruction (inspired by ARM)
 	 *