[PATCH v2] [POWERPC] ppc32: Fix errata for 603 CPUs

[PATCH v2] [POWERPC] ppc32: Fix errata for 603 CPUs

[Kumar Gala]

603 CPUs have the same issue that some 750 CPUs have in that they can crash
in funny ways if a store from an FPU register instruction is executed on a
register that has never been initialized since power on.  This patch fixes
it by making sure all FP registers have been properly initialized at kernel
boot.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---

Becky pointed out that I had a copy/paste issue (duplicated the call to
__init_fpu_registers).  Going to find the brown paper bag now.

Paul, (the update) is also in my powerpc-tree since its a pretty trivial patch.

- k

 arch/powerpc/kernel/cpu_setup_6xx.S |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/kernel/cpu_setup_6xx.S b/arch/powerpc/kernel/cpu_setup_6xx.S
index f1ee0b3..72d1d73 100644
--- a/arch/powerpc/kernel/cpu_setup_6xx.S
+++ b/arch/powerpc/kernel/cpu_setup_6xx.S
@@ -17,7 +17,13 @@
 #include <asm/cache.h>

 _GLOBAL(__setup_cpu_603)
-	b	setup_common_caches
+	mflr	r4
+BEGIN_FTR_SECTION
+	bl	__init_fpu_registers
+END_FTR_SECTION_IFCLR(CPU_FTR_FPU_UNAVAILABLE)
+	bl	setup_common_caches
+	mtlr	r4
+	blr
 _GLOBAL(__setup_cpu_604)
 	mflr	r4
 	bl	setup_common_caches
-- 
1.5.4.1