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authorDavid S. Miller <davem@sunset.davemloft.net>2006-02-21 17:29:42 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2006-03-20 04:13:50 -0500
commit8ca2557c48000daa8183b07d83f582a597705ebe (patch)
tree2ce53d5b4d6f21509dc4bc5fdeead1f559e626a0 /arch/sparc64
parentd371c0c17466b7e7bb4d395f96aa885a23df1073 (diff)
[SPARC64]: Niagara optimized memset/bzero/clear_user.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
-rw-r--r--arch/sparc64/kernel/head.S2
-rw-r--r--arch/sparc64/lib/Makefile2
-rw-r--r--arch/sparc64/lib/NGbzero.S162
3 files changed, 165 insertions, 1 deletions
diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S
index 3222c8205b57..8c6c4694be94 100644
--- a/arch/sparc64/kernel/head.S
+++ b/arch/sparc64/kernel/head.S
@@ -420,6 +420,8 @@ niagara_tlb_fixup:
420 /* Patch copy/clear ops. */ 420 /* Patch copy/clear ops. */
421 call niagara_patch_copyops 421 call niagara_patch_copyops
422 nop 422 nop
423 call niagara_patch_bzero
424 nop
423 call niagara_patch_pageops 425 call niagara_patch_pageops
424 nop 426 nop
425 427
diff --git a/arch/sparc64/lib/Makefile b/arch/sparc64/lib/Makefile
index 3d0e9a24d7a3..8812ded19f01 100644
--- a/arch/sparc64/lib/Makefile
+++ b/arch/sparc64/lib/Makefile
@@ -12,7 +12,7 @@ lib-y := PeeCeeI.o copy_page.o clear_page.o strlen.o strncmp.o \
12 U1memcpy.o U1copy_from_user.o U1copy_to_user.o \ 12 U1memcpy.o U1copy_from_user.o U1copy_to_user.o \
13 U3memcpy.o U3copy_from_user.o U3copy_to_user.o U3patch.o \ 13 U3memcpy.o U3copy_from_user.o U3copy_to_user.o U3patch.o \
14 NGmemcpy.o NGcopy_from_user.o NGcopy_to_user.o NGpatch.o \ 14 NGmemcpy.o NGcopy_from_user.o NGcopy_to_user.o NGpatch.o \
15 NGpage.o \ 15 NGpage.o NGbzero.o \
16 copy_in_user.o user_fixup.o memmove.o \ 16 copy_in_user.o user_fixup.o memmove.o \
17 mcount.o ipcsum.o rwsem.o xor.o find_bit.o delay.o 17 mcount.o ipcsum.o rwsem.o xor.o find_bit.o delay.o
18 18
diff --git a/arch/sparc64/lib/NGbzero.S b/arch/sparc64/lib/NGbzero.S
new file mode 100644
index 000000000000..fef584f745dc
--- /dev/null
+++ b/arch/sparc64/lib/NGbzero.S
@@ -0,0 +1,162 @@
1/* NGbzero.S: Niagara optimized memset/clear_user.
2 *
3 * Copyright (C) 2006 David S. Miller (davem@davemloft.net)
4 */
5#include <asm/asi.h>
6
7#define EX_ST(x,y) \
898: x,y; \
9 .section .fixup; \
10 .align 4; \
1199: retl; \
12 mov %o1, %o0; \
13 .section __ex_table; \
14 .align 4; \
15 .word 98b, 99b; \
16 .text; \
17 .align 4;
18
19 .text
20
21 .globl NGmemset
22 .type NGmemset, #function
23NGmemset: /* %o0=buf, %o1=pat, %o2=len */
24 and %o1, 0xff, %o3
25 mov %o2, %o1
26 sllx %o3, 8, %g1
27 or %g1, %o3, %o2
28 sllx %o2, 16, %g1
29 or %g1, %o2, %o2
30 sllx %o2, 32, %g1
31 ba,pt %xcc, 1f
32 or %g1, %o2, %o2
33
34 .globl NGbzero
35 .type NGbzero, #function
36NGbzero:
37 clr %o2
381: brz,pn %o1, NGbzero_return
39 mov %o0, %o3
40
41 /* %o5: saved %asi, restored at NGbzero_done
42 * %g7: store-init %asi to use
43 * %o4: non-store-init %asi to use
44 */
45 rd %asi, %o5
46 mov ASI_BLK_INIT_QUAD_LDD_P, %g7
47 mov ASI_P, %o4
48 wr %o4, 0x0, %asi
49
50NGbzero_from_clear_user:
51 cmp %o1, 15
52 bl,pn %icc, NGbzero_tiny
53 andcc %o0, 0x7, %g1
54 be,pt %xcc, 2f
55 mov 8, %g2
56 sub %g2, %g1, %g1
57 sub %o1, %g1, %o1
581: EX_ST(stba %o2, [%o0 + 0x00] %asi)
59 subcc %g1, 1, %g1
60 bne,pt %xcc, 1b
61 add %o0, 1, %o0
622: cmp %o1, 128
63 bl,pn %icc, NGbzero_medium
64 andcc %o0, (64 - 1), %g1
65 be,pt %xcc, NGbzero_pre_loop
66 mov 64, %g2
67 sub %g2, %g1, %g1
68 sub %o1, %g1, %o1
691: EX_ST(stxa %o2, [%o0 + 0x00] %asi)
70 subcc %g1, 8, %g1
71 bne,pt %xcc, 1b
72 add %o0, 8, %o0
73
74NGbzero_pre_loop:
75 wr %g7, 0x0, %asi
76 andn %o1, (64 - 1), %g1
77 sub %o1, %g1, %o1
78NGbzero_loop:
79 EX_ST(stxa %o2, [%o0 + 0x00] %asi)
80 EX_ST(stxa %o2, [%o0 + 0x08] %asi)
81 EX_ST(stxa %o2, [%o0 + 0x10] %asi)
82 EX_ST(stxa %o2, [%o0 + 0x18] %asi)
83 EX_ST(stxa %o2, [%o0 + 0x20] %asi)
84 EX_ST(stxa %o2, [%o0 + 0x28] %asi)
85 EX_ST(stxa %o2, [%o0 + 0x30] %asi)
86 EX_ST(stxa %o2, [%o0 + 0x38] %asi)
87 subcc %g1, 64, %g1
88 bne,pt %xcc, NGbzero_loop
89 add %o0, 64, %o0
90
91 wr %o4, 0x0, %asi
92 brz,pn %o1, NGbzero_done
93NGbzero_medium:
94 andncc %o1, 0x7, %g1
95 be,pn %xcc, 2f
96 sub %o1, %g1, %o1
971: EX_ST(stxa %o2, [%o0 + 0x00] %asi)
98 subcc %g1, 8, %g1
99 bne,pt %xcc, 1b
100 add %o0, 8, %o0
1012: brz,pt %o1, NGbzero_done
102 nop
103
104NGbzero_tiny:
1051: EX_ST(stba %o2, [%o0 + 0x00] %asi)
106 subcc %o1, 1, %o1
107 bne,pt %icc, 1b
108 add %o0, 1, %o0
109
110 /* fallthrough */
111
112NGbzero_done:
113 wr %o5, 0x0, %asi
114
115NGbzero_return:
116 retl
117 mov %o3, %o0
118 .size NGbzero, .-NGbzero
119 .size NGmemset, .-NGmemset
120
121 .globl NGclear_user
122 .type NGclear_user, #function
123NGclear_user: /* %o0=buf, %o1=len */
124 rd %asi, %o5
125 brz,pn %o1, NGbzero_done
126 clr %o3
127 cmp %o5, ASI_AIUS
128 bne,pn %icc, NGbzero
129 clr %o2
130 mov ASI_BLK_INIT_QUAD_LDD_AIUS, %g7
131 ba,pt %xcc, NGbzero_from_clear_user
132 mov ASI_AIUS, %o4
133 .size NGclear_user, .-NGclear_user
134
135#define BRANCH_ALWAYS 0x10680000
136#define NOP 0x01000000
137#define NG_DO_PATCH(OLD, NEW) \
138 sethi %hi(NEW), %g1; \
139 or %g1, %lo(NEW), %g1; \
140 sethi %hi(OLD), %g2; \
141 or %g2, %lo(OLD), %g2; \
142 sub %g1, %g2, %g1; \
143 sethi %hi(BRANCH_ALWAYS), %g3; \
144 sll %g1, 11, %g1; \
145 srl %g1, 11 + 2, %g1; \
146 or %g3, %lo(BRANCH_ALWAYS), %g3; \
147 or %g3, %g1, %g3; \
148 stw %g3, [%g2]; \
149 sethi %hi(NOP), %g3; \
150 or %g3, %lo(NOP), %g3; \
151 stw %g3, [%g2 + 0x4]; \
152 flush %g2;
153
154 .globl niagara_patch_bzero
155 .type niagara_patch_bzero,#function
156niagara_patch_bzero:
157 NG_DO_PATCH(memset, NGmemset)
158 NG_DO_PATCH(__bzero, NGbzero)
159 NG_DO_PATCH(__clear_user, NGclear_user)
160 retl
161 nop
162 .size niagara_patch_bzero,.-niagara_patch_bzero
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