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| author | David Daney <ddaney@caviumnetworks.com> | 2012-08-23 10:02:03 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2012-10-11 11:11:20 +0200 |
| commit | 748e787eb6de610c4427594923ef8ca1f5431b74 (patch) | |
| tree | e7577a2a0dd354110487887703f6aa719317f691 | |
| parent | 981ef0de49869c9a60e9b1ff35a734525dd790e0 (diff) | |
| download | linux-748e787eb6de610c4427594923ef8ca1f5431b74.tar.gz linux-748e787eb6de610c4427594923ef8ca1f5431b74.tar.bz2 linux-748e787eb6de610c4427594923ef8ca1f5431b74.zip | |
MIPS: Optimize TLB refill for RI/XI configurations.
We don't have to do a separate shift to eliminate the software bits,
just rotate them into the fill and they will be ignored.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4294/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/mm/tlbex.c | 23 |
1 files changed, 7 insertions, 16 deletions
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index e09d49256908..658a520364ce 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -599,8 +599,7 @@ static __cpuinit __maybe_unused void build_convert_pte_to_entrylo(u32 **p, unsigned int reg) { if (cpu_has_rixi) { - UASM_i_SRL(p, reg, reg, ilog2(_PAGE_NO_EXEC)); - UASM_i_ROTR(p, reg, reg, ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC)); + UASM_i_ROTR(p, reg, reg, ilog2(_PAGE_GLOBAL)); } else { #ifdef CONFIG_64BIT_PHYS_ADDR uasm_i_dsrl_safe(p, reg, reg, ilog2(_PAGE_GLOBAL)); @@ -1019,11 +1018,9 @@ static void __cpuinit build_update_entries(u32 **p, unsigned int tmp, uasm_i_ld(p, tmp, 0, ptep); /* get even pte */ uasm_i_ld(p, ptep, sizeof(pte_t), ptep); /* get odd pte */ if (cpu_has_rixi) { - UASM_i_SRL(p, tmp, tmp, ilog2(_PAGE_NO_EXEC)); - UASM_i_SRL(p, ptep, ptep, ilog2(_PAGE_NO_EXEC)); - UASM_i_ROTR(p, tmp, tmp, ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC)); + UASM_i_ROTR(p, tmp, tmp, ilog2(_PAGE_GLOBAL)); UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */ - UASM_i_ROTR(p, ptep, ptep, ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC)); + UASM_i_ROTR(p, ptep, ptep, ilog2(_PAGE_GLOBAL)); } else { uasm_i_dsrl_safe(p, tmp, tmp, ilog2(_PAGE_GLOBAL)); /* convert to entrylo0 */ UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */ @@ -1046,13 +1043,11 @@ static void __cpuinit build_update_entries(u32 **p, unsigned int tmp, if (r45k_bvahwbug()) build_tlb_probe_entry(p); if (cpu_has_rixi) { - UASM_i_SRL(p, tmp, tmp, ilog2(_PAGE_NO_EXEC)); - UASM_i_SRL(p, ptep, ptep, ilog2(_PAGE_NO_EXEC)); - UASM_i_ROTR(p, tmp, tmp, ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC)); + UASM_i_ROTR(p, tmp, tmp, ilog2(_PAGE_GLOBAL)); if (r4k_250MHZhwbug()) UASM_i_MTC0(p, 0, C0_ENTRYLO0); UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */ - UASM_i_ROTR(p, ptep, ptep, ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC)); + UASM_i_ROTR(p, ptep, ptep, ilog2(_PAGE_GLOBAL)); } else { UASM_i_SRL(p, tmp, tmp, ilog2(_PAGE_GLOBAL)); /* convert to entrylo0 */ if (r4k_250MHZhwbug()) @@ -1212,13 +1207,9 @@ build_fast_tlb_refill_handler (u32 **p, struct uasm_label **l, UASM_i_LW(p, odd, sizeof(pte_t), ptr); /* get odd pte */ } if (cpu_has_rixi) { - uasm_i_dsrl_safe(p, even, even, ilog2(_PAGE_NO_EXEC)); - uasm_i_dsrl_safe(p, odd, odd, ilog2(_PAGE_NO_EXEC)); - uasm_i_drotr(p, even, even, - ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC)); + uasm_i_drotr(p, even, even, ilog2(_PAGE_GLOBAL)); UASM_i_MTC0(p, even, C0_ENTRYLO0); /* load it */ - uasm_i_drotr(p, odd, odd, - ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC)); + uasm_i_drotr(p, odd, odd, ilog2(_PAGE_GLOBAL)); } else { uasm_i_dsrl_safe(p, even, even, ilog2(_PAGE_GLOBAL)); UASM_i_MTC0(p, even, C0_ENTRYLO0); /* load it */ |