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powerpc/fsl-booke: Add support for tlbilx instructions

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The e500mc core supports the new tlbilx instructions that do core
local invalidates and also provide us the ability to take down
all TLB entries matching a given PID.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2009-02-10 22:26:06 -06:00
parent c026c98739
commit c3071951d0
3 changed files with 41 additions and 10 deletions
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4
arch/powerpc/include/asm/mmu.h
View File

@ -36,9 +36,9 @@
*/
#define MMU_FTR_USE_TLBIVAX_BCAST ASM_CONST(0x00040000)
/* Enable use of tlbilx invalidate-by-PID variant.
/* Enable use of tlbilx invalidate instructions.
*/
#define MMU_FTR_USE_TLBILX_PID ASM_CONST(0x00080000)
#define MMU_FTR_USE_TLBILX ASM_CONST(0x00080000)
/* This indicates that the processor cannot handle multiple outstanding
* broadcast tlbivax or tlbsync. This makes the code use a spinlock

3
arch/powerpc/kernel/cputable.c
View File

@ -1754,7 +1754,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_name = "e500mc",
.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_features = MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS |
MMU_FTR_USE_TLBILX,
.icache_bsize = 64,
.dcache_bsize = 64,
.num_pmcs = 4,

44
arch/powerpc/mm/tlb_nohash_low.S
View File

@ -118,25 +118,50 @@ _GLOBAL(_tlbil_pid)
#elif defined(CONFIG_FSL_BOOKE)
/*
* FSL BookE implementations. Currently _pid and _all are the
* same. This will change when tlbilx is actually supported and
* performs invalidate-by-PID. This change will be driven by
* mmu_features conditional
* FSL BookE implementations.
*
* Since feature sections are using _SECTION_ELSE we need
* to have the larger code path before the _SECTION_ELSE
*/
#define MMUCSR0_TLBFI (MMUCSR0_TLB0FI | MMUCSR0_TLB1FI | \
MMUCSR0_TLB2FI | MMUCSR0_TLB3FI)
/*
* Flush MMU TLB on the local processor
*/
_GLOBAL(_tlbil_pid)
_GLOBAL(_tlbil_all)
#define MMUCSR0_TLBFI (MMUCSR0_TLB0FI | MMUCSR0_TLB1FI | \
MMUCSR0_TLB2FI | MMUCSR0_TLB3FI)
BEGIN_MMU_FTR_SECTION
li r3,(MMUCSR0_TLBFI)@l
mtspr SPRN_MMUCSR0, r3
1:
mfspr r3,SPRN_MMUCSR0
andi. r3,r3,MMUCSR0_TLBFI@l
bne 1b
MMU_FTR_SECTION_ELSE
PPC_TLBILX_ALL(0,0)
ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_USE_TLBILX)
msync
isync
blr
_GLOBAL(_tlbil_pid)
BEGIN_MMU_FTR_SECTION
slwi r3,r3,16
mfmsr r10
wrteei 0
mfspr r4,SPRN_MAS6 /* save MAS6 */
mtspr SPRN_MAS6,r3
PPC_TLBILX_PID(0,0)
mtspr SPRN_MAS6,r4 /* restore MAS6 */
wrtee r10
MMU_FTR_SECTION_ELSE
li r3,(MMUCSR0_TLBFI)@l
mtspr SPRN_MMUCSR0, r3
1:
mfspr r3,SPRN_MMUCSR0
andi. r3,r3,MMUCSR0_TLBFI@l
bne 1b
ALT_MMU_FTR_SECTION_END_IFSET(MMU_FTR_USE_TLBILX)
msync
isync
blr
@ -149,7 +174,9 @@ _GLOBAL(_tlbil_va)
mfmsr r10
wrteei 0
slwi r4,r4,16
ori r4,r4,(MAS6_ISIZE(BOOK3E_PAGESZ_4K))@l
mtspr SPRN_MAS6,r4 /* assume AS=0 for now */
BEGIN_MMU_FTR_SECTION
tlbsx 0,r3
mfspr r4,SPRN_MAS1 /* check valid */
andis. r3,r4,MAS1_VALID@h
@ -157,6 +184,9 @@ _GLOBAL(_tlbil_va)
rlwinm r4,r4,0,1,31
mtspr SPRN_MAS1,r4
tlbwe
MMU_FTR_SECTION_ELSE
PPC_TLBILX_VA(0,r3)
ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_USE_TLBILX)
msync
isync
1: wrtee r10