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| author | Akira Takeuchi <takeuchi.akr@jp.panasonic.com> | 2010-10-27 20:28:51 +0400 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2010-10-27 20:28:51 +0400 |
| commit | 965ea4bbb9ae926358273368144ba838c561bc38 (patch) | |
| tree | c6ee08f2f2970bb500ccc7cf58de6beea870e4f8 /arch/mn10300/include/asm/mmu_context.h | |
| parent | dccbf4853a31a3f774f38c402209d23388d99f52 (diff) | |
| download | linux-965ea4bbb9ae926358273368144ba838c561bc38.tar.xz | |
MN10300: SMP TLB flushing
Implement global TLB flushing for MN10300. This will be used by the AM34 which
is SMP capable.
Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'arch/mn10300/include/asm/mmu_context.h')
| -rw-r--r-- | arch/mn10300/include/asm/mmu_context.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/mn10300/include/asm/mmu_context.h b/arch/mn10300/include/asm/mmu_context.h index 5fb3648968ae..c8f6c82672ad 100644 --- a/arch/mn10300/include/asm/mmu_context.h +++ b/arch/mn10300/include/asm/mmu_context.h @@ -36,6 +36,22 @@ #define enter_lazy_tlb(mm, tsk) do {} while (0) +static inline void cpu_ran_vm(int cpu, struct mm_struct *mm) +{ +#ifdef CONFIG_SMP + cpumask_set_cpu(cpu, mm_cpumask(mm)); +#endif +} + +static inline bool cpu_maybe_ran_vm(int cpu, struct mm_struct *mm) +{ +#ifdef CONFIG_SMP + return cpumask_test_and_set_cpu(cpu, mm_cpumask(mm)); +#else + return true; +#endif +} + #ifdef CONFIG_MN10300_TLB_USE_PIDR extern unsigned long mmu_context_cache[NR_CPUS]; #define mm_context(mm) (mm->context.tlbpid[smp_processor_id()]) @@ -127,7 +143,13 @@ static inline void activate_context(struct mm_struct *mm) static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { + int cpu = smp_processor_id(); + if (prev != next) { +#ifdef CONFIG_SMP + per_cpu(cpu_tlbstate, cpu).active_mm = next; +#endif + cpu_ran_vm(cpu, next); PTBR = (unsigned long) next->pgd; activate_context(next); } |