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| author | Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> | 2013-11-14 16:12:30 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-01-22 20:19:00 +0100 |
| commit | 601cfa7b6fb657cff9e8f77bbcce79f75dd7ab74 (patch) | |
| tree | 6468ffe9a1b589e715e9157cf21629c4e78b109c /arch/mips/mm/tlb-r4k.c | |
| parent | 198bb4cef13525dd9391623c514557123cc6cc31 (diff) | |
| download | linux-0-day-601cfa7b6fb657cff9e8f77bbcce79f75dd7ab74.tar.gz linux-0-day-601cfa7b6fb657cff9e8f77bbcce79f75dd7ab74.tar.xz | |
MIPS: mm: Use the TLBINVF instruction to flush the VTLB
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@imgtec.com>
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6138/
Diffstat (limited to 'arch/mips/mm/tlb-r4k.c')
| -rw-r--r-- | arch/mips/mm/tlb-r4k.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c index 363aa0343bbe3..427dcacca586b 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); |