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/* $Id: blockops.S,v 1.27 2000/07/14 01:12:49 davem Exp $
* blockops.S: UltraSparc block zero optimized routines.
*
* Copyright (C) 1996, 1998, 1999, 2000 David S. Miller (davem@redhat.com)
* Copyright (C) 1997 Jakub Jelinek (jakub@redhat.com)
*/
#include "VIS.h"
#include <asm/visasm.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/asm_offsets.h>
#define TOUCH(reg0, reg1, reg2, reg3, reg4, reg5, reg6, reg7) \
fmovd %reg0, %f48; fmovd %reg1, %f50; \
fmovd %reg2, %f52; fmovd %reg3, %f54; \
fmovd %reg4, %f56; fmovd %reg5, %f58; \
fmovd %reg6, %f60; fmovd %reg7, %f62;
#define TLBTEMP_BASE (8 * 1024 * 1024)
#define DCACHE_SIZE (PAGE_SIZE * 2)
#define TLBTEMP_ENT1 (61 << 3)
#define TLBTEMP_ENT2 (62 << 3)
#define TLBTEMP_ENTSZ (1 << 3)
.text
.align 32
.globl _copy_page
.type _copy_page,@function
_copy_page: /* %o0=dest, %o1=src */
VISEntry
membar #LoadStore | #StoreStore | #StoreLoad
ldda [%o1] ASI_BLK_P, %f0
add %o1, 0x40, %o1
ldda [%o1] ASI_BLK_P, %f16
add %o1, 0x40, %o1
sethi %hi(8192), %o2
1: TOUCH(f0, f2, f4, f6, f8, f10, f12, f14)
ldda [%o1] ASI_BLK_P, %f32
stda %f48, [%o0] ASI_BLK_P
add %o1, 0x40, %o1
sub %o2, 0x40, %o2
add %o0, 0x40, %o0
TOUCH(f16, f18, f20, f22, f24, f26, f28, f30)
ldda [%o1] ASI_BLK_P, %f0
stda %f48, [%o0] ASI_BLK_P
add %o1, 0x40, %o1
sub %o2, 0x40, %o2
add %o0, 0x40, %o0
TOUCH(f32, f34, f36, f38, f40, f42, f44, f46)
ldda [%o1] ASI_BLK_P, %f16
stda %f48, [%o0] ASI_BLK_P
sub %o2, 0x40, %o2
add %o1, 0x40, %o1
cmp %o2, 0x80
bne,pt %xcc, 1b
add %o0, 0x40, %o0
membar #Sync
stda %f0, [%o0] ASI_BLK_P
add %o0, 0x40, %o0
stda %f16, [%o0] ASI_BLK_P
membar #Sync
VISExit
retl
nop
.globl copy_user_page
.type copy_user_page,@function
copy_user_page: /* %o0=dest, %o1=src, %o2=vaddr */
VISEntry
sethi %hi(PAGE_SIZE), %g3
sub %o0, %g4, %g1
and %o2, %g3, %o0
sethi %hi(TLBTEMP_BASE), %o3
sethi %uhi(_PAGE_VALID), %g3
sub %o1, %g4, %g2
sllx %g3, 32, %g3
mov TLB_TAG_ACCESS, %o2
or %g3, (_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W), %g3
sethi %hi(DCACHE_SIZE), %o1
or %g1, %g3, %g1
or %g2, %g3, %g2
add %o0, %o3, %o0
add %o0, %o1, %o1
mov TLBTEMP_ENT1, %o3
rdpr %pstate, %g3
wrpr %g3, PSTATE_IE, %pstate
/* Do this now, before loading the fixed TLB entries for copying,
* so we do not risk a multiple TLB match condition later when
* restoring those entries.
*/
ldub [%g6 + AOFF_task_thread + AOFF_thread_use_blkcommit], %g3
/* Spitfire Errata #32 workaround */
mov 0x8, %o4
stxa %g0, [%o4] ASI_DMMU
sethi %hi(empty_zero_page), %o4
flush %o4
ldxa [%o3] ASI_DTLB_TAG_READ, %o4
/* Spitfire Errata #32 workaround */
mov 0x8, %o5
stxa %g0, [%o5] ASI_DMMU
sethi %hi(empty_zero_page), %o5
flush %o5
ldxa [%o3] ASI_DTLB_DATA_ACCESS, %o5
stxa %o0, [%o2] ASI_DMMU
stxa %g1, [%o3] ASI_DTLB_DATA_ACCESS
membar #Sync
add %o3, (TLBTEMP_ENTSZ), %o3
/* Spitfire Errata #32 workaround */
mov 0x8, %g5
stxa %g0, [%g5] ASI_DMMU
sethi %hi(empty_zero_page), %g5
flush %g5
ldxa [%o3] ASI_DTLB_TAG_READ, %g5
/* Spitfire Errata #32 workaround */
mov 0x8, %g7
stxa %g0, [%g7] ASI_DMMU
sethi %hi(empty_zero_page), %g7
flush %g7
ldxa [%o3] ASI_DTLB_DATA_ACCESS, %g7
stxa %o1, [%o2] ASI_DMMU
stxa %g2, [%o3] ASI_DTLB_DATA_ACCESS
membar #Sync
cmp %g3, 0
bne,pn %xcc, copy_page_using_blkcommit
nop
ldda [%o1] ASI_BLK_P, %f0
add %o1, 0x40, %o1
ldda [%o1] ASI_BLK_P, %f16
add %o1, 0x40, %o1
sethi %hi(8192), %o2
1: TOUCH(f0, f2, f4, f6, f8, f10, f12, f14)
ldda [%o1] ASI_BLK_P, %f32
stda %f48, [%o0] ASI_BLK_P
add %o1, 0x40, %o1
sub %o2, 0x40, %o2
add %o0, 0x40, %o0
TOUCH(f16, f18, f20, f22, f24, f26, f28, f30)
ldda [%o1] ASI_BLK_P, %f0
stda %f48, [%o0] ASI_BLK_P
add %o1, 0x40, %o1
sub %o2, 0x40, %o2
add %o0, 0x40, %o0
TOUCH(f32, f34, f36, f38, f40, f42, f44, f46)
ldda [%o1] ASI_BLK_P, %f16
stda %f48, [%o0] ASI_BLK_P
sub %o2, 0x40, %o2
add %o1, 0x40, %o1
cmp %o2, 0x80
bne,pt %xcc, 1b
add %o0, 0x40, %o0
membar #Sync
stda %f0, [%o0] ASI_BLK_P
add %o0, 0x40, %o0
stda %f16, [%o0] ASI_BLK_P
copy_user_page_continue:
membar #Sync
VISExit
mov TLB_TAG_ACCESS, %o2
stxa %g5, [%o2] ASI_DMMU
stxa %g7, [%o3] ASI_DTLB_DATA_ACCESS
membar #Sync
sub %o3, (TLBTEMP_ENTSZ), %o3
stxa %o4, [%o2] ASI_DMMU
stxa %o5, [%o3] ASI_DTLB_DATA_ACCESS
membar #Sync
rdpr %pstate, %g3
jmpl %o7 + 0x8, %g0
wrpr %g3, PSTATE_IE, %pstate
copy_page_using_blkcommit:
membar #LoadStore | #StoreStore | #StoreLoad
ldda [%o1] ASI_BLK_P, %f0
add %o1, 0x40, %o1
ldda [%o1] ASI_BLK_P, %f16
add %o1, 0x40, %o1
sethi %hi(8192), %o2
1: TOUCH(f0, f2, f4, f6, f8, f10, f12, f14)
ldda [%o1] ASI_BLK_P, %f32
stda %f48, [%o0] ASI_BLK_COMMIT_P
add %o1, 0x40, %o1
sub %o2, 0x40, %o2
add %o0, 0x40, %o0
TOUCH(f16, f18, f20, f22, f24, f26, f28, f30)
ldda [%o1] ASI_BLK_P, %f0
stda %f48, [%o0] ASI_BLK_COMMIT_P
add %o1, 0x40, %o1
sub %o2, 0x40, %o2
add %o0, 0x40, %o0
TOUCH(f32, f34, f36, f38, f40, f42, f44, f46)
ldda [%o1] ASI_BLK_P, %f16
stda %f48, [%o0] ASI_BLK_COMMIT_P
sub %o2, 0x40, %o2
add %o1, 0x40, %o1
cmp %o2, 0x80
bne,pt %xcc, 1b
add %o0, 0x40, %o0
membar #Sync
stda %f0, [%o0] ASI_BLK_COMMIT_P
add %o0, 0x40, %o0
ba,pt %xcc, copy_user_page_continue
stda %f16, [%o0] ASI_BLK_COMMIT_P
.align 32
.globl _clear_page
.type _clear_page,@function
_clear_page: /* %o0=dest */
VISEntryHalf
ba,pt %xcc, clear_page_common
clr %o4
.align 32
.globl clear_user_page
.type clear_user_page,@function
clear_user_page: /* %o0=dest, %o1=vaddr */
VISEntryHalf
sethi %hi(PAGE_SIZE), %g3
sub %o0, %g4, %g1
and %o1, %g3, %o0
mov TLB_TAG_ACCESS, %o2
sethi %uhi(_PAGE_VALID), %g3
sethi %hi(TLBTEMP_BASE), %o3
sllx %g3, 32, %g3
or %g3, (_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W), %g3
or %g1, %g3, %g1
add %o0, %o3, %o0
mov TLBTEMP_ENT2, %o3
rdpr %pstate, %g3
wrpr %g3, PSTATE_IE, %pstate
/* Spitfire Errata #32 workaround */
mov 0x8, %g5
stxa %g0, [%g5] ASI_DMMU
sethi %hi(empty_zero_page), %g5
flush %g5
ldxa [%o3] ASI_DTLB_TAG_READ, %g5
/* Spitfire Errata #32 workaround */
mov 0x8, %g7
stxa %g0, [%g7] ASI_DMMU
sethi %hi(empty_zero_page), %g7
flush %g7
ldxa [%o3] ASI_DTLB_DATA_ACCESS, %g7
stxa %o0, [%o2] ASI_DMMU
stxa %g1, [%o3] ASI_DTLB_DATA_ACCESS
membar #Sync
mov 1, %o4
clear_page_common:
membar #StoreLoad | #StoreStore | #LoadStore ! LSU Group
fzero %f0 ! FPA Group
mov 32, %o1 ! IEU0
fzero %f2 ! FPA Group
faddd %f0, %f2, %f4 ! FPA Group
fmuld %f0, %f2, %f6 ! FPM
faddd %f0, %f2, %f8 ! FPA Group
fmuld %f0, %f2, %f10 ! FPM
faddd %f0, %f2, %f12 ! FPA Group
fmuld %f0, %f2, %f14 ! FPM
1: stda %f0, [%o0 + %g0] ASI_BLK_P ! Store Group
add %o0, 0x40, %o0 ! IEU0
stda %f0, [%o0 + %g0] ASI_BLK_P ! Store Group
add %o0, 0x40, %o0 ! IEU0
stda %f0, [%o0 + %g0] ASI_BLK_P ! Store Group
add %o0, 0x40, %o0 ! IEU0 Group
stda %f0, [%o0 + %g0] ASI_BLK_P ! Store Group
subcc %o1, 1, %o1 ! IEU1
bne,pt %icc, 1b ! CTI
add %o0, 0x40, %o0 ! IEU0 Group
membar #Sync ! LSU Group
VISExitHalf
brnz,pt %o4, 1f
nop
retl
nop
1: stxa %g5, [%o2] ASI_DMMU
stxa %g7, [%o3] ASI_DTLB_DATA_ACCESS
membar #Sync
jmpl %o7 + 0x8, %g0
wrpr %g3, 0x0, %pstate
|
