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| author | Kumar Gala <galak@kernel.crashing.org> | 2010-05-13 23:38:21 +0400 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2010-05-17 19:56:20 +0400 |
| commit | 78f622377f7d31d988db350a43c5689dd5f31876 (patch) | |
| tree | f399c9c492b9a3397a0974981049b2adaddf279d /arch/powerpc/mm/tlb_nohash_low.S | |
| parent | 78e2e68a2b79f394b7cd61e07987a8a89af907f7 (diff) | |
| download | linux-78f622377f7d31d988db350a43c5689dd5f31876.tar.xz | |
powerpc/fsl-booke: Move loadcam_entry back to asm code to fix SMP ftrace
When we build with ftrace enabled its possible that loadcam_entry would
have used the stack pointer (even though the code doesn't need it). We
call loadcam_entry in __secondary_start before the stack is setup. To
ensure that loadcam_entry doesn't use the stack pointer the easiest
solution is to just have it in asm code.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/tlb_nohash_low.S')
| -rw-r--r-- | arch/powerpc/mm/tlb_nohash_low.S | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/powerpc/mm/tlb_nohash_low.S b/arch/powerpc/mm/tlb_nohash_low.S index e925cb58afd9..cfa768203d08 100644 --- a/arch/powerpc/mm/tlb_nohash_low.S +++ b/arch/powerpc/mm/tlb_nohash_low.S @@ -365,3 +365,31 @@ _GLOBAL(set_context) #else #error Unsupported processor type ! #endif + +#if defined(CONFIG_FSL_BOOKE) +/* + * extern void loadcam_entry(unsigned int index) + * + * Load TLBCAM[index] entry in to the L2 CAM MMU + */ +_GLOBAL(loadcam_entry) + LOAD_REG_ADDR(r4, TLBCAM) + mulli r5,r3,TLBCAM_SIZE + add r3,r5,r4 + lwz r4,TLBCAM_MAS0(r3) + mtspr SPRN_MAS0,r4 + lwz r4,TLBCAM_MAS1(r3) + mtspr SPRN_MAS1,r4 + PPC_LL r4,TLBCAM_MAS2(r3) + mtspr SPRN_MAS2,r4 + lwz r4,TLBCAM_MAS3(r3) + mtspr SPRN_MAS3,r4 +BEGIN_MMU_FTR_SECTION + lwz r4,TLBCAM_MAS7(r3) + mtspr SPRN_MAS7,r4 +END_MMU_FTR_SECTION_IFSET(MMU_FTR_BIG_PHYS) + isync + tlbwe + isync + blr +#endif |