[OpenBIOS] [commit] r1044 - trunk/openbios-devel/arch/ppc/qemu
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Fri Jun 17 02:55:05 CEST 2011
Author: agraf
Date: Fri Jun 17 02:55:04 2011
New Revision: 1044
URL: http://tracker.coreboot.org/trac/openbios/changeset/1044
Log:
ppc: only clear MSR_SF when clearing high MSR bits
We are pretty aggressive now with how we clear the high MSR bits, clearing
all of them when we find a 64-bit CPU.
As Segher points out, this is not always a good idea though. There might
be bits set that can be crucial for operation. Hence we should only clear
MSR_SF, as that's the bit we're interested in.
Reported-by: Segher Boessenkool <segher at kernel.crashing.org>
Signed-off-by: Alexander Graf <agraf at suse.de>
Modified:
trunk/openbios-devel/arch/ppc/qemu/start.S
Modified: trunk/openbios-devel/arch/ppc/qemu/start.S
==============================================================================
--- trunk/openbios-devel/arch/ppc/qemu/start.S Fri Jun 17 02:55:02 2011 (r1043)
+++ trunk/openbios-devel/arch/ppc/qemu/start.S Fri Jun 17 02:55:04 2011 (r1044)
@@ -44,7 +44,7 @@
beq 1f; \
\
mfmsr r1 ; /* unset MSR_SF */ \
- clrlwi r1,r1,0 ; \
+ clrldi r1,r1,1 ; \
mtmsrd r1 ; \
1: \
mfsprg0 r1 ; /* exception stack in sprg0 */ \
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