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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-04-15 02:32:02 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-04-27 07:02:10 +0400 |
| commit | bd491781097f150687906008d639936a0c00ed90 (patch) | |
| tree | 96a6926005c6765724fce93b0b27e504cd0172df /arch/powerpc/mm/mmu_context_nohash.c | |
| parent | 76b4eda866c4936af8d696f040abea56bf688e16 (diff) | |
| download | linux-bd491781097f150687906008d639936a0c00ed90.tar.xz | |
powerpc: Add TLB size detection for TYPE_3E MMUs
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/mmu_context_nohash.c')
| -rw-r--r-- | arch/powerpc/mm/mmu_context_nohash.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/powerpc/mm/mmu_context_nohash.c b/arch/powerpc/mm/mmu_context_nohash.c index 4d8fa911c73d..336807de550e 100644 --- a/arch/powerpc/mm/mmu_context_nohash.c +++ b/arch/powerpc/mm/mmu_context_nohash.c @@ -409,7 +409,17 @@ void __init mmu_context_init(void) } else if (mmu_has_feature(MMU_FTR_TYPE_47x)) { first_context = 1; last_context = 65535; - } else { + } else +#ifdef CONFIG_PPC_BOOK3E_MMU + if (mmu_has_feature(MMU_FTR_TYPE_3E)) { + u32 mmucfg = mfspr(SPRN_MMUCFG); + u32 pid_bits = (mmucfg & MMUCFG_PIDSIZE_MASK) + >> MMUCFG_PIDSIZE_SHIFT; + first_context = 1; + last_context = (1UL << (pid_bits + 1)) - 1; + } else +#endif + { first_context = 1; last_context = 255; } |