From fc215fe7e6f0420afee0e0987fcc311929ee662f Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Mon, 21 Apr 2008 14:09:44 -0500 Subject: [PATCH] [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 --- arch/powerpc/kernel/cpu_setup_6xx.S | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/cpu_setup_6xx.S b/arch/powerpc/kernel/cpu_setup_6xx.S index f1ee0b3f78f..72d1d739525 100644 --- a/arch/powerpc/kernel/cpu_setup_6xx.S +++ b/arch/powerpc/kernel/cpu_setup_6xx.S @@ -17,7 +17,13 @@ #include _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 -- 2.41.0