diff options
| author | merge <null@invalid> | 2009-01-22 13:55:32 +0000 |
|---|---|---|
| committer | Andy Green <agreen@octopus.localdomain> | 2009-01-22 13:55:32 +0000 |
| commit | aa6f5ffbdba45aa8e19e5048648fc6c7b25376d3 (patch) | |
| tree | fbb786d0ac6f8a774fd834e9ce951197e60fbffa /arch/sparc/kernel/dtlb_prot.S | |
| parent | f2d78193eae5dccd3d588d2c8ea0866efc368332 (diff) | |
MERGE-via-pending-tracking-hist-MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141
pending-tracking-hist top was MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141 / fdf777a63bcb59e0dfd78bfe2c6242e01f6d4eb9 ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-stable-tracking-hist-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040
stable-tracking-hist top was MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040 / 90463bfd2d5a3c8b52f6e6d71024a00e052b0ced ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-mokopatches-tracking-hist-fix-stray-endmenu-patch
mokopatches-tracking-hist top was fix-stray-endmenu-patch / 3630e0be570de8057e7f8d2fe501ed353cdf34e6 ... parent commitmessage:
From: Andy Green <andy@openmoko.com>
fix-stray-endmenu.patch
Signed-off-by: Andy Green <andy@openmoko.com>
Diffstat (limited to 'arch/sparc/kernel/dtlb_prot.S')
| -rw-r--r-- | arch/sparc/kernel/dtlb_prot.S | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/sparc/kernel/dtlb_prot.S b/arch/sparc/kernel/dtlb_prot.S new file mode 100644 index 00000000000..b2c2c5be281 --- /dev/null +++ b/arch/sparc/kernel/dtlb_prot.S @@ -0,0 +1,54 @@ +/* + * 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 |