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1 | /* atomic-ops.S: kernel atomic operations |
2 | * | |
3 | * For an explanation of how atomic ops work in this arch, see: | |
0868ff7a | 4 | * Documentation/frv/atomic-ops.txt |
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5 | * |
6 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. | |
7 | * Written by David Howells (dhowells@redhat.com) | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | #include <asm/spr-regs.h> | |
16 | ||
17 | .text | |
18 | .balign 4 | |
19 | ||
20 | ############################################################################### | |
21 | # | |
22 | # unsigned long atomic_test_and_ANDNOT_mask(unsigned long mask, volatile unsigned long *v); | |
23 | # | |
24 | ############################################################################### | |
25 | .globl atomic_test_and_ANDNOT_mask | |
26 | .type atomic_test_and_ANDNOT_mask,@function | |
27 | atomic_test_and_ANDNOT_mask: | |
28 | not.p gr8,gr10 | |
29 | 0: | |
30 | orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */ | |
31 | ckeq icc3,cc7 | |
32 | ld.p @(gr9,gr0),gr8 /* LD.P/ORCR must be atomic */ | |
33 | orcr cc7,cc7,cc3 /* set CC3 to true */ | |
34 | and gr8,gr10,gr11 | |
35 | cst.p gr11,@(gr9,gr0) ,cc3,#1 | |
36 | corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */ | |
37 | beq icc3,#0,0b | |
38 | bralr | |
39 | ||
40 | .size atomic_test_and_ANDNOT_mask, .-atomic_test_and_ANDNOT_mask | |
41 | ||
42 | ############################################################################### | |
43 | # | |
44 | # unsigned long atomic_test_and_OR_mask(unsigned long mask, volatile unsigned long *v); | |
45 | # | |
46 | ############################################################################### | |
47 | .globl atomic_test_and_OR_mask | |
48 | .type atomic_test_and_OR_mask,@function | |
49 | atomic_test_and_OR_mask: | |
50 | or.p gr8,gr8,gr10 | |
51 | 0: | |
52 | orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */ | |
53 | ckeq icc3,cc7 | |
54 | ld.p @(gr9,gr0),gr8 /* LD.P/ORCR must be atomic */ | |
55 | orcr cc7,cc7,cc3 /* set CC3 to true */ | |
56 | or gr8,gr10,gr11 | |
57 | cst.p gr11,@(gr9,gr0) ,cc3,#1 | |
58 | corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */ | |
59 | beq icc3,#0,0b | |
60 | bralr | |
61 | ||
62 | .size atomic_test_and_OR_mask, .-atomic_test_and_OR_mask | |
63 | ||
64 | ############################################################################### | |
65 | # | |
66 | # unsigned long atomic_test_and_XOR_mask(unsigned long mask, volatile unsigned long *v); | |
67 | # | |
68 | ############################################################################### | |
69 | .globl atomic_test_and_XOR_mask | |
70 | .type atomic_test_and_XOR_mask,@function | |
71 | atomic_test_and_XOR_mask: | |
72 | or.p gr8,gr8,gr10 | |
73 | 0: | |
74 | orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */ | |
75 | ckeq icc3,cc7 | |
76 | ld.p @(gr9,gr0),gr8 /* LD.P/ORCR must be atomic */ | |
77 | orcr cc7,cc7,cc3 /* set CC3 to true */ | |
78 | xor gr8,gr10,gr11 | |
79 | cst.p gr11,@(gr9,gr0) ,cc3,#1 | |
80 | corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */ | |
81 | beq icc3,#0,0b | |
82 | bralr | |
83 | ||
84 | .size atomic_test_and_XOR_mask, .-atomic_test_and_XOR_mask | |
85 | ||
86 | ############################################################################### | |
87 | # | |
88 | # int atomic_add_return(int i, atomic_t *v) | |
89 | # | |
90 | ############################################################################### | |
91 | .globl atomic_add_return | |
92 | .type atomic_add_return,@function | |
93 | atomic_add_return: | |
94 | or.p gr8,gr8,gr10 | |
95 | 0: | |
96 | orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */ | |
97 | ckeq icc3,cc7 | |
98 | ld.p @(gr9,gr0),gr8 /* LD.P/ORCR must be atomic */ | |
99 | orcr cc7,cc7,cc3 /* set CC3 to true */ | |
100 | add gr8,gr10,gr8 | |
101 | cst.p gr8,@(gr9,gr0) ,cc3,#1 | |
102 | corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */ | |
103 | beq icc3,#0,0b | |
104 | bralr | |
105 | ||
106 | .size atomic_add_return, .-atomic_add_return | |
107 | ||
108 | ############################################################################### | |
109 | # | |
110 | # int atomic_sub_return(int i, atomic_t *v) | |
111 | # | |
112 | ############################################################################### | |
113 | .globl atomic_sub_return | |
114 | .type atomic_sub_return,@function | |
115 | atomic_sub_return: | |
116 | or.p gr8,gr8,gr10 | |
117 | 0: | |
118 | orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */ | |
119 | ckeq icc3,cc7 | |
120 | ld.p @(gr9,gr0),gr8 /* LD.P/ORCR must be atomic */ | |
121 | orcr cc7,cc7,cc3 /* set CC3 to true */ | |
122 | sub gr8,gr10,gr8 | |
123 | cst.p gr8,@(gr9,gr0) ,cc3,#1 | |
124 | corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */ | |
125 | beq icc3,#0,0b | |
126 | bralr | |
127 | ||
128 | .size atomic_sub_return, .-atomic_sub_return | |
129 | ||
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130 | ############################################################################### |
131 | # | |
132 | # uint32_t __xchg_32(uint32_t i, uint32_t *v) | |
133 | # | |
134 | ############################################################################### | |
135 | .globl __xchg_32 | |
136 | .type __xchg_32,@function | |
137 | __xchg_32: | |
138 | or.p gr8,gr8,gr10 | |
139 | 0: | |
140 | orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */ | |
141 | ckeq icc3,cc7 | |
142 | ld.p @(gr9,gr0),gr8 /* LD.P/ORCR must be atomic */ | |
143 | orcr cc7,cc7,cc3 /* set CC3 to true */ | |
144 | cst.p gr10,@(gr9,gr0) ,cc3,#1 | |
145 | corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */ | |
146 | beq icc3,#0,0b | |
147 | bralr | |
148 | ||
149 | .size __xchg_32, .-__xchg_32 | |
150 | ||
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151 | ############################################################################### |
152 | # | |
153 | # uint32_t __cmpxchg_32(uint32_t *v, uint32_t test, uint32_t new) | |
154 | # | |
155 | ############################################################################### | |
156 | .globl __cmpxchg_32 | |
157 | .type __cmpxchg_32,@function | |
158 | __cmpxchg_32: | |
159 | or.p gr8,gr8,gr11 | |
160 | 0: | |
161 | orcc gr0,gr0,gr0,icc3 | |
162 | ckeq icc3,cc7 | |
163 | ld.p @(gr11,gr0),gr8 | |
164 | orcr cc7,cc7,cc3 | |
165 | subcc gr8,gr9,gr7,icc0 | |
00460f41 | 166 | bnelr icc0,#0 |
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167 | cst.p gr10,@(gr11,gr0) ,cc3,#1 |
168 | corcc gr29,gr29,gr0 ,cc3,#1 | |
169 | beq icc3,#0,0b | |
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170 | bralr |
171 | ||
172 | .size __cmpxchg_32, .-__cmpxchg_32 |