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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [sparc64/] [kernel/] [dtlb_prot.S] - Blame information for rev 1765

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/* $Id: dtlb_prot.S,v 1.1.1.1 2004-04-15 01:34:43 phoenix Exp $
 * 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     */
        stxa            %g0, [%g1] ASI_DMMU             ! Clear SFSR FaultValid bit
        membar          #Sync                           ! Synchronize ASI stores
        rdpr            %pstate, %g5                    ! Move into alternate globals
        wrpr            %g5, PSTATE_AG|PSTATE_MG, %pstate
        rdpr            %tl, %g1                        ! Need to do a winfixup?
        cmp             %g1, 1                          ! Trap level >1?
        mov             TLB_TAG_ACCESS, %g4             ! Prepare reload of vaddr
        nop
 
/* 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

Line No.	Rev	Author	Line
1	1275	phoenix	`/* $Id: dtlb_prot.S,v 1.1.1.1 2004-04-15 01:34:43 phoenix Exp $`
2			`* dtlb_prot.S: DTLB protection trap strategy.`
3			`* This is included directly into the trap table.`
4			`*`
5			`* Copyright (C) 1996,1998 David S. Miller (davem@redhat.com)`
6			`* Copyright (C) 1997,1998 Jakub Jelinek (jj@ultra.linux.cz)`
7			`*/`
8
9			`/* Ways we can get here:`
10			`*`
11			`* [TL == 0] 1) User stores to readonly pages.`
12			`* [TL == 0] 2) Nucleus stores to user readonly pages.`
13			`* [TL > 0] 3) Nucleus stores to user readonly stack frame.`
14			`*/`
15
16			`/* PROT ** ICACHE line 1: User DTLB protection trap */`
17			`stxa %g0, [%g1] ASI_DMMU ! Clear SFSR FaultValid bit`
18			`membar #Sync ! Synchronize ASI stores`
19			`rdpr %pstate, %g5 ! Move into alternate globals`
20			`wrpr %g5, PSTATE_AG\|PSTATE_MG, %pstate`
21			`rdpr %tl, %g1 ! Need to do a winfixup?`
22			`cmp %g1, 1 ! Trap level >1?`
23			`mov TLB_TAG_ACCESS, %g4 ! Prepare reload of vaddr`
24			`nop`
25
26			`/* PROT ** ICACHE line 2: More real fault processing */`
27			`bgu,pn %xcc, winfix_trampoline ! Yes, perform winfixup`
28			`ldxa [%g4] ASI_DMMU, %g5 ! Put tagaccess in %g5`
29			`ba,pt %xcc, sparc64_realfault_common ! Nope, normal fault`
30			`mov FAULT_CODE_DTLB \| FAULT_CODE_WRITE, %g4`
31			`nop`
32			`nop`
33			`nop`
34			`nop`
35
36			`/* PROT ** ICACHE line 3: Unused... */`
37			`nop`
38			`nop`
39			`nop`
40			`nop`
41			`nop`
42			`nop`
43			`nop`
44			`nop`
45
46			`/* PROT ** ICACHE line 4: Unused... */`
47			`nop`
48			`nop`
49			`nop`
50			`nop`
51			`nop`
52			`nop`
53			`nop`
54			`nop`

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [sparc64/] [kernel/] [dtlb_prot.S] - Blame information for rev 1765