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Diffstat (limited to 'arch/mips/mm/tlb-r4k.c')
-rw-r--r--arch/mips/mm/tlb-r4k.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index 65160d4984d9..dcd6913dc1ff 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -48,6 +48,22 @@ extern void build_tlb_refill_handler(void);
#endif /* CONFIG_MIPS_MT_SMTC */
+#if defined(CONFIG_CPU_LOONGSON2)
+/*
+ * LOONGSON2 has a 4 entry itlb which is a subset of dtlb,
+ * unfortrunately, itlb is not totally transparent to software.
+ */
+#define FLUSH_ITLB write_c0_diag(4);
+
+#define FLUSH_ITLB_VM(vma) { if ((vma)->vm_flags & VM_EXEC) write_c0_diag(4); }
+
+#else
+
+#define FLUSH_ITLB
+#define FLUSH_ITLB_VM(vma)
+
+#endif
+
void local_flush_tlb_all(void)
{
unsigned long flags;
@@ -73,6 +89,7 @@ void local_flush_tlb_all(void)
}
tlbw_use_hazard();
write_c0_entryhi(old_ctx);
+ FLUSH_ITLB;
EXIT_CRITICAL(flags);
}
@@ -136,6 +153,7 @@ void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
} else {
drop_mmu_context(mm, cpu);
}
+ FLUSH_ITLB;
EXIT_CRITICAL(flags);
}
}
@@ -178,6 +196,7 @@ void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
} else {
local_flush_tlb_all();
}
+ FLUSH_ITLB;
EXIT_CRITICAL(flags);
}
@@ -210,6 +229,7 @@ void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
finish:
write_c0_entryhi(oldpid);
+ FLUSH_ITLB_VM(vma);
EXIT_CRITICAL(flags);
}
}
@@ -241,7 +261,7 @@ void local_flush_tlb_one(unsigned long page)
tlbw_use_hazard();
}
write_c0_entryhi(oldpid);
-
+ FLUSH_ITLB;
EXIT_CRITICAL(flags);
}
@@ -293,6 +313,7 @@ void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte)
else
tlb_write_indexed();
tlbw_use_hazard();
+ FLUSH_ITLB_VM(vma);
EXIT_CRITICAL(flags);
}