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| author | David S. Miller <davem@sunset.davemloft.net> | 2005-09-27 01:12:18 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2005-09-27 01:12:18 +0200 |
| commit | 0dc461069879b45a2d5333bd16990f8080a318fd (patch) | |
| tree | d1f4b129750655352ac6a2ac1bee80fc95213a4f /arch/sparc64/mm/ultra.S | |
| parent | [SPARC64]: Simplify Spitfire D-cache page flush. (diff) | |
| download | linux-0dc461069879b45a2d5333bd16990f8080a318fd.tar.xz linux-0dc461069879b45a2d5333bd16990f8080a318fd.zip | |
[SPARC64]: Do not do TLB pre-filling any more.
In order to do it correctly on UltraSPARC-III+ and later we'd
need to add some complicated code to set the TAG access extension
register before loading the TLB.
Since this optimization gives questionable gains, it's best to
just remove it for now instead of adding the fix for Ultra-III+
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | arch/sparc64/mm/ultra.S | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S index 5ff5e42fb9d4..058b8126c1a7 100644 --- a/arch/sparc64/mm/ultra.S +++ b/arch/sparc64/mm/ultra.S @@ -180,35 +180,6 @@ __flush_dcache_page: /* %o0=kaddr, %o1=flush_icache */ .previous - .align 32 -__prefill_dtlb: - rdpr %pstate, %g7 - wrpr %g7, PSTATE_IE, %pstate - mov TLB_TAG_ACCESS, %g1 - stxa %o5, [%g1] ASI_DMMU - stxa %o2, [%g0] ASI_DTLB_DATA_IN - flush %g6 - retl - wrpr %g7, %pstate -__prefill_itlb: - rdpr %pstate, %g7 - wrpr %g7, PSTATE_IE, %pstate - mov TLB_TAG_ACCESS, %g1 - stxa %o5, [%g1] ASI_IMMU - stxa %o2, [%g0] ASI_ITLB_DATA_IN - flush %g6 - retl - wrpr %g7, %pstate - - .globl __update_mmu_cache -__update_mmu_cache: /* %o0=hw_context, %o1=address, %o2=pte, %o3=fault_code */ - srlx %o1, PAGE_SHIFT, %o1 - andcc %o3, FAULT_CODE_DTLB, %g0 - sllx %o1, PAGE_SHIFT, %o5 - bne,pt %xcc, __prefill_dtlb - or %o5, %o0, %o5 - ba,a,pt %xcc, __prefill_itlb - /* Cheetah specific versions, patched at boot time. */ __cheetah_flush_tlb_mm: /* 18 insns */ rdpr %pstate, %g7 |