From: Leonid Yegoshin <Leonid.Yegoshin@xxxxxxxxxx>
The TLBINVF instruction can be used to flush the entire VTLB.
This eliminates the need for the TLBWI loop and improves performance.
Reviewed-by: Paul Burton <paul.burton@xxxxxxxxxx>
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@xxxxxxxxxx>
Signed-off-by: Markos Chandras <markos.chandras@xxxxxxxxxx>
---
arch/mips/mm/tlb-r4k.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index 363aa03..427dcac 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -83,13 +83,19 @@ void local_flush_tlb_all(void)
entry = read_c0_wired();
/* Blast 'em all away. */
- while (entry < current_cpu_data.tlbsize) {
- /* Make sure all entries differ. */
- write_c0_entryhi(UNIQUE_ENTRYHI(entry));
- write_c0_index(entry);
+ if (cpu_has_tlbinv && current_cpu_data.tlbsize) {
+ write_c0_index(0);
mtc0_tlbw_hazard();
- tlb_write_indexed();
- entry++;
+ tlbinvf(); /* invalidate VTLB */
+ } else {
+ while (entry < current_cpu_data.tlbsize) {
+ /* Make sure all entries differ. */
+ write_c0_entryhi(UNIQUE_ENTRYHI(entry));
+ write_c0_index(entry);
+ mtc0_tlbw_hazard();
+ tlb_write_indexed();
+ entry++;
+ }
}
tlbw_use_hazard();
write_c0_entryhi(old_ctx);
--
1.8.4.3
