From bd491781097f150687906008d639936a0c00ed90 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Thu, 14 Apr 2011 22:32:02 +0000 Subject: powerpc: Add TLB size detection for TYPE_3E MMUs Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/mm/mmu_context_nohash.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/mm') 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; } -- cgit v1.2.2