Commit fc215fe7 authored Apr 21, 2008 by Kumar Gala

[POWERPC] ppc32: Fix errata for 603 CPUs



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>

parent 87c448c2

arch/powerpc/kernel/cpu_setup_6xx.S

+7 −1

Original line number	Diff line number	Diff line
		@@ -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