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[POWERPC] ppc32: Fix errata for 603 CPUs

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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>
This commit is contained in:
Kumar Gala 2008-04-21 14:09:44 -05:00
parent 87c448c2f2
commit fc215fe7e6
1 changed files with 7 additions and 1 deletions
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8
arch/powerpc/kernel/cpu_setup_6xx.S
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@ -17,7 +17,13 @@
#include <asm/cache.h> #include <asm/cache.h>
_GLOBAL(__setup_cpu_603) _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) _GLOBAL(__setup_cpu_604)
mflr r4 mflr r4
bl setup_common_caches bl setup_common_caches