diff options
| author | Becky Bruce <beckyb@kernel.crashing.org> | 2011-06-28 14:54:47 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-07-08 00:21:34 -0500 |
| commit | 3160b09796129abc9523ea3cd1633b0faba64a02 (patch) | |
| tree | 53713f22a00a100d8d1e3e2a677da26f206d9fd6 /arch/powerpc | |
| parent | f6ad160e6f4f4d6933eeb82a2bfa25ea008585f0 (diff) | |
powerpc: Create next_tlbcam_idx percpu variable for FSL_BOOKE
This is used to round-robin TLBCAM entries.
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/mmu.h | 5 | ||||
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/mm/mem.c | 9 | ||||
| -rw-r--r-- | arch/powerpc/mm/tlb_nohash.c | 6 |
4 files changed, 24 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index 4138b21ae80..b427a55ce2a 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -115,6 +115,11 @@ #ifndef __ASSEMBLY__ #include <asm/cputable.h> +#ifdef CONFIG_PPC_FSL_BOOK3E +#include <asm/percpu.h> +DECLARE_PER_CPU(int, next_tlbcam_idx); +#endif + static inline int mmu_has_feature(unsigned long feature) { return (cur_cpu_spec->mmu_features & feature); diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 6c8e739a12d..567a1746ed7 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -305,6 +305,10 @@ struct thread_info *current_set[NR_CPUS]; static void __devinit smp_store_cpu_info(int id) { per_cpu(cpu_pvr, id) = mfspr(SPRN_PVR); +#ifdef CONFIG_PPC_FSL_BOOK3E + per_cpu(next_tlbcam_idx, id) + = (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1; +#endif } void __init smp_prepare_cpus(unsigned int max_cpus) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index a3841bb75cb..457dc84154b 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -353,6 +353,15 @@ void __init mem_init(void) } #endif /* CONFIG_HIGHMEM */ +#if defined(CONFIG_PPC_FSL_BOOK3E) && !defined(CONFIG_SMP) + /* + * If smp is enabled, next_tlbcam_idx is initialized in the cpu up + * functions.... do it here for the non-smp case. + */ + per_cpu(next_tlbcam_idx, smp_processor_id()) = + (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1; +#endif + printk(KERN_INFO "Memory: %luk/%luk available (%luk kernel code, " "%luk reserved, %luk data, %luk bss, %luk init)\n", nr_free_pages() << (PAGE_SHIFT-10), diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c index 3722185d186..e80ed1093e2 100644 --- a/arch/powerpc/mm/tlb_nohash.c +++ b/arch/powerpc/mm/tlb_nohash.c @@ -102,6 +102,12 @@ unsigned long linear_map_top; /* Top of linear mapping */ #endif /* CONFIG_PPC64 */ +#ifdef CONFIG_PPC_FSL_BOOK3E +/* next_tlbcam_idx is used to round-robin tlbcam entry assignment */ +DEFINE_PER_CPU(int, next_tlbcam_idx); +EXPORT_PER_CPU_SYMBOL(next_tlbcam_idx); +#endif + /* * Base TLB flushing operations: * |