From 075bcf5879225d0c2a119c23d8046b890e051e81 Mon Sep 17 00:00:00 2001
From: Tony Breeds <tony@bakeyournoodle.com>
Date: Wed, 30 Nov 2011 21:39:22 +0000
Subject: [PATCH] powerpc/boot: Add mfdcrx

Needed for currituck support.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Josh Boyer <jwboyer@gmail.com>
---
 arch/powerpc/boot/dcr.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h
index 645a7c964e5f..cc73f7a95e26 100644
--- a/arch/powerpc/boot/dcr.h
+++ b/arch/powerpc/boot/dcr.h
@@ -9,6 +9,12 @@
 	})
 #define mtdcr(rn, val) \
 	asm volatile("mtdcr %0,%1" : : "i"(rn), "r"(val))
+#define mfdcrx(rn) \
+	({	\
+		unsigned long rval; \
+		asm volatile("mfdcrx %0,%1" : "=r"(rval) : "r"(rn)); \
+		rval; \
+	})
 
 /* 440GP/440GX SDRAM controller DCRs */
 #define DCRN_SDRAM0_CFGADDR				0x010
-- 
2.20.1