diff options
Diffstat (limited to 'arch/sparc64/kernel/dtlb_prot.S')
| -rw-r--r-- | arch/sparc64/kernel/dtlb_prot.S | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/arch/sparc64/kernel/dtlb_prot.S b/arch/sparc64/kernel/dtlb_prot.S deleted file mode 100644 index b2c2c5be281c..000000000000 --- a/arch/sparc64/kernel/dtlb_prot.S +++ /dev/null @@ -1,54 +0,0 @@ -/* - * dtlb_prot.S: DTLB protection trap strategy. - * This is included directly into the trap table. - * - * Copyright (C) 1996,1998 David S. Miller (davem@redhat.com) - * Copyright (C) 1997,1998 Jakub Jelinek (jj@ultra.linux.cz) - */ - -/* Ways we can get here: - * - * [TL == 0] 1) User stores to readonly pages. - * [TL == 0] 2) Nucleus stores to user readonly pages. - * [TL > 0] 3) Nucleus stores to user readonly stack frame. - */ - -/* PROT ** ICACHE line 1: User DTLB protection trap */ - mov TLB_SFSR, %g1 - stxa %g0, [%g1] ASI_DMMU ! Clear FaultValid bit - membar #Sync ! Synchronize stores - rdpr %pstate, %g5 ! Move into alt-globals - wrpr %g5, PSTATE_AG|PSTATE_MG, %pstate - rdpr %tl, %g1 ! Need a winfixup? - cmp %g1, 1 ! Trap level >1? - mov TLB_TAG_ACCESS, %g4 ! For reload of vaddr - -/* PROT ** ICACHE line 2: More real fault processing */ - bgu,pn %xcc, winfix_trampoline ! Yes, perform winfixup - ldxa [%g4] ASI_DMMU, %g5 ! Put tagaccess in %g5 - ba,pt %xcc, sparc64_realfault_common ! Nope, normal fault - mov FAULT_CODE_DTLB | FAULT_CODE_WRITE, %g4 - nop - nop - nop - nop - -/* PROT ** ICACHE line 3: Unused... */ - nop - nop - nop - nop - nop - nop - nop - nop - -/* PROT ** ICACHE line 4: Unused... */ - nop - nop - nop - nop - nop - nop - nop - nop |