[PATCH] powerpc: Disable external interrupts in bootwrapper

[Mark A. Greer]

Disable external interrupts very early in the bootwrapper in case
the firmware left a device generating interrupts.

Signed-off-by: Mark A. Greer <mgreer at mvista.com>
---

 crt0.S |    6 ++++++
 1 file changed, 6 insertions(+)
---

diff --git a/arch/powerpc/boot/crt0.S b/arch/powerpc/boot/crt0.S
index 3dc8d8f..f048a46 100644
--- a/arch/powerpc/boot/crt0.S
+++ b/arch/powerpc/boot/crt0.S
@@ -23,6 +23,12 @@ _zimage_start:
 	   and the address where we're running. */
 	bl	1f
 1:	mflr	r0
+	li	r9,(1<<15)@l	/* Disable external intrs (clear MSR[EE]) */
+	mfmsr	r10
+	andc	r10,r10,r9
+	sync
+	mtmsr	r10
+	isync
 	lis	r9,1b at ha
 	addi	r9,r9,1b at l
 	subf.	r0,r9,r0