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Message-Id: <20110216014700.694532430@clark.kroah.org> Date: Tue, 15 Feb 2011 17:45:30 -0800 From: Greg KH <gregkh@...e.de> To: linux-kernel@...r.kernel.org, stable@...nel.org Cc: stable-review@...nel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Benjamin Herrenschmidt <benh@...nel.crashing.org> Subject: [064/115] powerpc: Fix some 6xx/7xxx CPU setup functions 2.6.32-longterm review patch. If anyone has any objections, please let us know. ------------------ From: Benjamin Herrenschmidt <benh@...nel.crashing.org> commit 1f1936ff3febf38d582177ea319eaa278f32c91f upstream. Some of those functions try to adjust the CPU features, for example to remove NAP support on some revisions. However, they seem to use r5 as an index into the CPU table entry, which might have been right a long time ago but no longer is. r4 is the right register to use. This probably caused some off behaviours on some PowerMac variants using 750cx or 7455 processor revisions. Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- arch/powerpc/kernel/cpu_setup_6xx.S | 40 ++++++++++++++++++------------------ 1 file changed, 20 insertions(+), 20 deletions(-) --- a/arch/powerpc/kernel/cpu_setup_6xx.S +++ b/arch/powerpc/kernel/cpu_setup_6xx.S @@ -18,7 +18,7 @@ #include <asm/mmu.h> _GLOBAL(__setup_cpu_603) - mflr r4 + mflr r5 BEGIN_MMU_FTR_SECTION li r10,0 mtspr SPRN_SPRG_603_LRU,r10 /* init SW LRU tracking */ @@ -27,60 +27,60 @@ BEGIN_FTR_SECTION bl __init_fpu_registers END_FTR_SECTION_IFCLR(CPU_FTR_FPU_UNAVAILABLE) bl setup_common_caches - mtlr r4 + mtlr r5 blr _GLOBAL(__setup_cpu_604) - mflr r4 + mflr r5 bl setup_common_caches bl setup_604_hid0 - mtlr r4 + mtlr r5 blr _GLOBAL(__setup_cpu_750) - mflr r4 + mflr r5 bl __init_fpu_registers bl setup_common_caches bl setup_750_7400_hid0 - mtlr r4 + mtlr r5 blr _GLOBAL(__setup_cpu_750cx) - mflr r4 + mflr r5 bl __init_fpu_registers bl setup_common_caches bl setup_750_7400_hid0 bl setup_750cx - mtlr r4 + mtlr r5 blr _GLOBAL(__setup_cpu_750fx) - mflr r4 + mflr r5 bl __init_fpu_registers bl setup_common_caches bl setup_750_7400_hid0 bl setup_750fx - mtlr r4 + mtlr r5 blr _GLOBAL(__setup_cpu_7400) - mflr r4 + mflr r5 bl __init_fpu_registers bl setup_7400_workarounds bl setup_common_caches bl setup_750_7400_hid0 - mtlr r4 + mtlr r5 blr _GLOBAL(__setup_cpu_7410) - mflr r4 + mflr r5 bl __init_fpu_registers bl setup_7410_workarounds bl setup_common_caches bl setup_750_7400_hid0 li r3,0 mtspr SPRN_L2CR2,r3 - mtlr r4 + mtlr r5 blr _GLOBAL(__setup_cpu_745x) - mflr r4 + mflr r5 bl setup_common_caches bl setup_745x_specifics - mtlr r4 + mtlr r5 blr /* Enable caches for 603's, 604, 750 & 7400 */ @@ -194,10 +194,10 @@ setup_750cx: cror 4*cr0+eq,4*cr0+eq,4*cr1+eq cror 4*cr0+eq,4*cr0+eq,4*cr2+eq bnelr - lwz r6,CPU_SPEC_FEATURES(r5) + lwz r6,CPU_SPEC_FEATURES(r4) li r7,CPU_FTR_CAN_NAP andc r6,r6,r7 - stw r6,CPU_SPEC_FEATURES(r5) + stw r6,CPU_SPEC_FEATURES(r4) blr /* 750fx specific @@ -225,12 +225,12 @@ BEGIN_FTR_SECTION andis. r11,r11,L3CR_L3E@h beq 1f END_FTR_SECTION_IFSET(CPU_FTR_L3CR) - lwz r6,CPU_SPEC_FEATURES(r5) + lwz r6,CPU_SPEC_FEATURES(r4) andi. r0,r6,CPU_FTR_L3_DISABLE_NAP beq 1f li r7,CPU_FTR_CAN_NAP andc r6,r6,r7 - stw r6,CPU_SPEC_FEATURES(r5) + stw r6,CPU_SPEC_FEATURES(r4) 1: mfspr r11,SPRN_HID0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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