Commit 8ca2557c authored by David S. Miller's avatar David S. Miller

[SPARC64]: Niagara optimized memset/bzero/clear_user.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d371c0c1
...@@ -420,6 +420,8 @@ niagara_tlb_fixup: ...@@ -420,6 +420,8 @@ niagara_tlb_fixup:
/* Patch copy/clear ops. */ /* Patch copy/clear ops. */
call niagara_patch_copyops call niagara_patch_copyops
nop nop
call niagara_patch_bzero
nop
call niagara_patch_pageops call niagara_patch_pageops
nop nop
......
...@@ -12,7 +12,7 @@ lib-y := PeeCeeI.o copy_page.o clear_page.o strlen.o strncmp.o \ ...@@ -12,7 +12,7 @@ lib-y := PeeCeeI.o copy_page.o clear_page.o strlen.o strncmp.o \
U1memcpy.o U1copy_from_user.o U1copy_to_user.o \ U1memcpy.o U1copy_from_user.o U1copy_to_user.o \
U3memcpy.o U3copy_from_user.o U3copy_to_user.o U3patch.o \ U3memcpy.o U3copy_from_user.o U3copy_to_user.o U3patch.o \
NGmemcpy.o NGcopy_from_user.o NGcopy_to_user.o NGpatch.o \ NGmemcpy.o NGcopy_from_user.o NGcopy_to_user.o NGpatch.o \
NGpage.o \ NGpage.o NGbzero.o \
copy_in_user.o user_fixup.o memmove.o \ copy_in_user.o user_fixup.o memmove.o \
mcount.o ipcsum.o rwsem.o xor.o find_bit.o delay.o mcount.o ipcsum.o rwsem.o xor.o find_bit.o delay.o
......
/* NGbzero.S: Niagara optimized memset/clear_user.
*
* Copyright (C) 2006 David S. Miller (davem@davemloft.net)
*/
#include <asm/asi.h>
#define EX_ST(x,y) \
98: x,y; \
.section .fixup; \
.align 4; \
99: retl; \
mov %o1, %o0; \
.section __ex_table; \
.align 4; \
.word 98b, 99b; \
.text; \
.align 4;
.text
.globl NGmemset
.type NGmemset, #function
NGmemset: /* %o0=buf, %o1=pat, %o2=len */
and %o1, 0xff, %o3
mov %o2, %o1
sllx %o3, 8, %g1
or %g1, %o3, %o2
sllx %o2, 16, %g1
or %g1, %o2, %o2
sllx %o2, 32, %g1
ba,pt %xcc, 1f
or %g1, %o2, %o2
.globl NGbzero
.type NGbzero, #function
NGbzero:
clr %o2
1: brz,pn %o1, NGbzero_return
mov %o0, %o3
/* %o5: saved %asi, restored at NGbzero_done
* %g7: store-init %asi to use
* %o4: non-store-init %asi to use
*/
rd %asi, %o5
mov ASI_BLK_INIT_QUAD_LDD_P, %g7
mov ASI_P, %o4
wr %o4, 0x0, %asi
NGbzero_from_clear_user:
cmp %o1, 15
bl,pn %icc, NGbzero_tiny
andcc %o0, 0x7, %g1
be,pt %xcc, 2f
mov 8, %g2
sub %g2, %g1, %g1
sub %o1, %g1, %o1
1: EX_ST(stba %o2, [%o0 + 0x00] %asi)
subcc %g1, 1, %g1
bne,pt %xcc, 1b
add %o0, 1, %o0
2: cmp %o1, 128
bl,pn %icc, NGbzero_medium
andcc %o0, (64 - 1), %g1
be,pt %xcc, NGbzero_pre_loop
mov 64, %g2
sub %g2, %g1, %g1
sub %o1, %g1, %o1
1: EX_ST(stxa %o2, [%o0 + 0x00] %asi)
subcc %g1, 8, %g1
bne,pt %xcc, 1b
add %o0, 8, %o0
NGbzero_pre_loop:
wr %g7, 0x0, %asi
andn %o1, (64 - 1), %g1
sub %o1, %g1, %o1
NGbzero_loop:
EX_ST(stxa %o2, [%o0 + 0x00] %asi)
EX_ST(stxa %o2, [%o0 + 0x08] %asi)
EX_ST(stxa %o2, [%o0 + 0x10] %asi)
EX_ST(stxa %o2, [%o0 + 0x18] %asi)
EX_ST(stxa %o2, [%o0 + 0x20] %asi)
EX_ST(stxa %o2, [%o0 + 0x28] %asi)
EX_ST(stxa %o2, [%o0 + 0x30] %asi)
EX_ST(stxa %o2, [%o0 + 0x38] %asi)
subcc %g1, 64, %g1
bne,pt %xcc, NGbzero_loop
add %o0, 64, %o0
wr %o4, 0x0, %asi
brz,pn %o1, NGbzero_done
NGbzero_medium:
andncc %o1, 0x7, %g1
be,pn %xcc, 2f
sub %o1, %g1, %o1
1: EX_ST(stxa %o2, [%o0 + 0x00] %asi)
subcc %g1, 8, %g1
bne,pt %xcc, 1b
add %o0, 8, %o0
2: brz,pt %o1, NGbzero_done
nop
NGbzero_tiny:
1: EX_ST(stba %o2, [%o0 + 0x00] %asi)
subcc %o1, 1, %o1
bne,pt %icc, 1b
add %o0, 1, %o0
/* fallthrough */
NGbzero_done:
wr %o5, 0x0, %asi
NGbzero_return:
retl
mov %o3, %o0
.size NGbzero, .-NGbzero
.size NGmemset, .-NGmemset
.globl NGclear_user
.type NGclear_user, #function
NGclear_user: /* %o0=buf, %o1=len */
rd %asi, %o5
brz,pn %o1, NGbzero_done
clr %o3
cmp %o5, ASI_AIUS
bne,pn %icc, NGbzero
clr %o2
mov ASI_BLK_INIT_QUAD_LDD_AIUS, %g7
ba,pt %xcc, NGbzero_from_clear_user
mov ASI_AIUS, %o4
.size NGclear_user, .-NGclear_user
#define BRANCH_ALWAYS 0x10680000
#define NOP 0x01000000
#define NG_DO_PATCH(OLD, NEW) \
sethi %hi(NEW), %g1; \
or %g1, %lo(NEW), %g1; \
sethi %hi(OLD), %g2; \
or %g2, %lo(OLD), %g2; \
sub %g1, %g2, %g1; \
sethi %hi(BRANCH_ALWAYS), %g3; \
sll %g1, 11, %g1; \
srl %g1, 11 + 2, %g1; \
or %g3, %lo(BRANCH_ALWAYS), %g3; \
or %g3, %g1, %g3; \
stw %g3, [%g2]; \
sethi %hi(NOP), %g3; \
or %g3, %lo(NOP), %g3; \
stw %g3, [%g2 + 0x4]; \
flush %g2;
.globl niagara_patch_bzero
.type niagara_patch_bzero,#function
niagara_patch_bzero:
NG_DO_PATCH(memset, NGmemset)
NG_DO_PATCH(__bzero, NGbzero)
NG_DO_PATCH(__clear_user, NGclear_user)
retl
nop
.size niagara_patch_bzero,.-niagara_patch_bzero
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