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authorKumar Gala <galak@kernel.crashing.org>2009-04-06 23:36:50 -0500
committerKumar Gala <galak@kernel.crashing.org>2009-04-07 01:36:30 -0500
commite9965577406a2148ade97b5e0ce7c448b4ba4ef6 (patch)
treec1291c2942e50af47c9391f6308d5f9c17377220 /arch
parent7281f5dc2c9582f3efaed9b367837ca6117d7b7f (diff)
downloadop-kernel-dev-e9965577406a2148ade97b5e0ce7c448b4ba4ef6.zip
op-kernel-dev-e9965577406a2148ade97b5e0ce7c448b4ba4ef6.tar.gz
powerpc: Add support for early tlbilx opcode
During the ISA 2.06 development the opcode for tlbilx changed and some early implementations used to old opcode. Add support for a MMU_FTR fixup to deal with this. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/include/asm/mmu.h6
-rw-r--r--arch/powerpc/include/asm/ppc-opcode.h11
-rw-r--r--arch/powerpc/kernel/cputable.c2
-rw-r--r--arch/powerpc/mm/tlb_nohash_low.S14
4 files changed, 30 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index cbf1543..86d2366 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -52,6 +52,12 @@
*/
#define MMU_FTR_NEED_DTLB_SW_LRU ASM_CONST(0x00200000)
+/* This indicates that the processor uses the wrong opcode for tlbilx
+ * instructions. During the ISA 2.06 development the opcode for tlbilx
+ * changed and some early implementations used to old opcode
+ */
+#define MMU_FTR_TLBILX_EARLY_OPCODE ASM_CONST(0x00400000)
+
#ifndef __ASSEMBLY__
#include <asm/cputable.h>
diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index 640ccbb..ef4da37 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -44,6 +44,7 @@
#define PPC_INST_STSWI 0x7c0005aa
#define PPC_INST_STSWX 0x7c00052a
#define PPC_INST_TLBILX 0x7c000024
+#define PPC_INST_TLBILX_EARLY 0x7c000626
#define PPC_INST_WAIT 0x7c00007c
/* macros to insert fields into opcodes */
@@ -63,10 +64,18 @@
#define PPC_RFDI stringify_in_c(.long PPC_INST_RFDI)
#define PPC_RFMCI stringify_in_c(.long PPC_INST_RFMCI)
#define PPC_TLBILX(t, a, b) stringify_in_c(.long PPC_INST_TLBILX | \
- __PPC_T_TLB(t) | __PPC_RA(a) | __PPC_RB(b))
+ __PPC_T_TLB(t) | \
+ __PPC_RA(a) | __PPC_RB(b))
#define PPC_TLBILX_ALL(a, b) PPC_TLBILX(0, a, b)
#define PPC_TLBILX_PID(a, b) PPC_TLBILX(1, a, b)
#define PPC_TLBILX_VA(a, b) PPC_TLBILX(3, a, b)
+
+#define PPC_TLBILX_EARLY(t, a, b) stringify_in_c(.long PPC_INST_TLBILX_EARLY | \
+ __PPC_T_TLB(t) | \
+ __PPC_RA(a) | __PPC_RB(b))
+#define PPC_TLBILX_ALL_EARLY(a, b) PPC_TLBILX_EARLY(0, a, b)
+#define PPC_TLBILX_PID_EARLY(a, b) PPC_TLBILX_EARLY(1, a, b)
+#define PPC_TLBILX_VA_EARLY(a, b) PPC_TLBILX_EARLY(3, a, b)
#define PPC_WAIT(w) stringify_in_c(.long PPC_INST_WAIT | \
__PPC_WC(w))
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index cd1b687..57db50f 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1766,7 +1766,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_features = CPU_FTRS_E500MC,
.cpu_user_features = COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
.mmu_features = MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS |
- MMU_FTR_USE_TLBILX,
+ MMU_FTR_USE_TLBILX | MMU_FTR_TLBILX_EARLY_OPCODE,
.icache_bsize = 64,
.dcache_bsize = 64,
.num_pmcs = 4,
diff --git a/arch/powerpc/mm/tlb_nohash_low.S b/arch/powerpc/mm/tlb_nohash_low.S
index 788b87c..45fed36 100644
--- a/arch/powerpc/mm/tlb_nohash_low.S
+++ b/arch/powerpc/mm/tlb_nohash_low.S
@@ -138,7 +138,11 @@ BEGIN_MMU_FTR_SECTION
andi. r3,r3,MMUCSR0_TLBFI@l
bne 1b
MMU_FTR_SECTION_ELSE
- PPC_TLBILX_ALL(0,0)
+ BEGIN_MMU_FTR_SECTION_NESTED(96)
+ PPC_TLBILX_ALL(0,r3)
+ MMU_FTR_SECTION_ELSE_NESTED(96)
+ PPC_TLBILX_ALL_EARLY(0,r3)
+ ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(MMU_FTR_TLBILX_EARLY_OPCODE, 96)
ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_USE_TLBILX)
msync
isync
@@ -151,7 +155,11 @@ BEGIN_MMU_FTR_SECTION
wrteei 0
mfspr r4,SPRN_MAS6 /* save MAS6 */
mtspr SPRN_MAS6,r3
+ BEGIN_MMU_FTR_SECTION_NESTED(96)
PPC_TLBILX_PID(0,0)
+ MMU_FTR_SECTION_ELSE_NESTED(96)
+ PPC_TLBILX_PID_EARLY(0,0)
+ ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(MMU_FTR_TLBILX_EARLY_OPCODE, 96)
mtspr SPRN_MAS6,r4 /* restore MAS6 */
wrtee r10
MMU_FTR_SECTION_ELSE
@@ -185,7 +193,11 @@ BEGIN_MMU_FTR_SECTION
mtspr SPRN_MAS1,r4
tlbwe
MMU_FTR_SECTION_ELSE
+ BEGIN_MMU_FTR_SECTION_NESTED(96)
PPC_TLBILX_VA(0,r3)
+ MMU_FTR_SECTION_ELSE_NESTED(96)
+ PPC_TLBILX_VA_EARLY(0,r3)
+ ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(MMU_FTR_TLBILX_EARLY_OPCODE, 96)
ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_USE_TLBILX)
msync
isync
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