diff options
Diffstat (limited to 'arch/sparc64/kernel/dtlb_base.S')
| -rw-r--r-- | arch/sparc64/kernel/dtlb_base.S | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/arch/sparc64/kernel/dtlb_base.S b/arch/sparc64/kernel/dtlb_base.S index 72120b563..80c74aa18 100644 --- a/arch/sparc64/kernel/dtlb_base.S +++ b/arch/sparc64/kernel/dtlb_base.S @@ -1,4 +1,4 @@ -/* $Id: dtlb_base.S,v 1.7 2000/03/26 09:13:48 davem Exp $ +/* $Id: dtlb_base.S,v 1.8 2000/11/10 08:28:45 davem Exp $ * dtlb_base.S: Front end to DTLB miss replacement strategy. * This is included directly into the trap table. * @@ -57,7 +57,7 @@ srax %g4, VPTE_SHIFT, %g6 ! Create VPTE offset ldxa [%g3 + %g6] ASI_S, %g5 ! Load VPTE 1: brlz,pt %g5, 9f ! Valid, load into TLB - and %g5, (_PAGE_PRESENT|_PAGE_READ), %g4 ! Mask readable bits + nop ! Delay-slot ba,a,pt %xcc, 4f ! Invalid, branch out /* DTLB ** ICACHE line 2: Quick kernel TLB misses */ @@ -68,27 +68,27 @@ nop 9: stxa %g5, [%g0] ASI_DTLB_DATA_IN ! Reload TLB retry ! Trap return - nop +4: rdpr %pstate, %g5 ! Move into alternate globals /* DTLB ** ICACHE line 3: winfixups+real_faults */ -4: cmp %g4, (_PAGE_PRESENT|_PAGE_READ) ! Readable page? - be,pn %xcc, 5f ! Yep, refbit update - sllx %g1, 60, %g4 ! Get valid bit - rdpr %pstate, %g5 ! Move into alternate globals wrpr %g5, PSTATE_AG|PSTATE_MG, %pstate rdpr %tl, %g4 ! See where we came from. cmp %g4, 1 ! Is etrap/rtrap window fault? mov TLB_TAG_ACCESS, %g4 ! Prepare for fault processing - -/* DTLB ** ICACHE line 4: padding */ ldxa [%g4] ASI_DMMU, %g5 ! Load faulting VA page be,pt %xcc, sparc64_realfault_common ! Jump to normal fault handling mov FAULT_CODE_DTLB, %g4 ! It was read from DTLB ba,a,pt %xcc, winfix_trampoline ! Call window fixup code -5: or %g5, _PAGE_ACCESSED, %g5 ! Indicate reference - or %g5, %g4, %g5 ! Set valid - stxa %g5, [%g3 + %g6] ASI_S ! Update PTE table (cant trap) - ba,a,pt %xcc, 9b ! Complete tlb miss + +/* DTLB ** ICACHE line 4: Unused... */ + nop + nop + nop + nop + nop + nop + nop + nop #undef TAG_CONTEXT_BITS #undef VPTE_SHIFT |