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-rw-r--r--arch/csky/include/asm/mmu.h1
-rw-r--r--arch/csky/include/asm/mmu_context.h12
2 files changed, 11 insertions, 2 deletions
diff --git a/arch/csky/include/asm/mmu.h b/arch/csky/include/asm/mmu.h
index 06f509ae09b0..b382a14ea4ec 100644
--- a/arch/csky/include/asm/mmu.h
+++ b/arch/csky/include/asm/mmu.h
@@ -5,6 +5,7 @@
#define __ASM_CSKY_MMU_H
typedef struct {
+ atomic64_t asid;
void *vdso;
} mm_context_t;
diff --git a/arch/csky/include/asm/mmu_context.h b/arch/csky/include/asm/mmu_context.h
index 86dde481df76..0285b0ad18b6 100644
--- a/arch/csky/include/asm/mmu_context.h
+++ b/arch/csky/include/asm/mmu_context.h
@@ -20,20 +20,28 @@
#define TLBMISS_HANDLER_SETUP_PGD_KERNEL(pgd) \
setup_pgd(__pa(pgd), true)
-#define init_new_context(tsk,mm) 0
+#define ASID_MASK ((1 << CONFIG_CPU_ASID_BITS) - 1)
+#define cpu_asid(mm) (atomic64_read(&mm->context.asid) & ASID_MASK)
+
+#define init_new_context(tsk,mm) ({ atomic64_set(&(mm)->context.asid, 0); 0; })
#define activate_mm(prev,next) switch_mm(prev, next, current)
#define destroy_context(mm) do {} while (0)
#define enter_lazy_tlb(mm, tsk) do {} while (0)
#define deactivate_mm(tsk, mm) do {} while (0)
+void check_and_switch_context(struct mm_struct *mm, unsigned int cpu);
+
static inline void
switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
+ unsigned int cpu = smp_processor_id();
+
if (prev != next)
- tlb_invalid_all();
+ check_and_switch_context(next, cpu);
TLBMISS_HANDLER_SETUP_PGD(next->pgd);
+ write_mmu_entryhi(next->context.asid.counter);
}
#endif /* __ASM_CSKY_MMU_CONTEXT_H */