Commit 1f1936ff authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
Browse files

powerpc: Fix some 6xx/7xxx CPU setup functions



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: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
CC: stable@kernel.org
parent af9eef3c
......@@ -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
......
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