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MN10300: SMP TLB flushing

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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>
This commit is contained in:
Akira Takeuchi
2010-10-27 17:28:51 +01:00
committad av David Howells
förälder dccbf4853a
incheckning 965ea4bbb9
4 ändrade filer med 288 tillägg och 27 borttagningar
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22
arch/mn10300/include/asm/mmu_context.h
Visa fil

@@ -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);
}