1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Based on arch/arm/include/asm/atomic.h
4 *
5 * Copyright (C) 1996 Russell King.
6 * Copyright (C) 2002 Deep Blue Solutions Ltd.
7 * Copyright (C) 2012 ARM Ltd.
8 */
9 #ifndef __ASM_ATOMIC_H
10 #define __ASM_ATOMIC_H
11
12 #include <linux/compiler.h>
13 #include <linux/types.h>
14
15 #include <asm/barrier.h>
16 #include <asm/cmpxchg.h>
17 #include <asm/lse.h>
18
19 #define ATOMIC_OP(op) \
20 static __always_inline void arch_##op(int i, atomic_t *v) \
21 { \
22 __lse_ll_sc_body(op, i, v); \
23 }
24
25 ATOMIC_OP(atomic_andnot)
ATOMIC_OP(atomic_or)26 ATOMIC_OP(atomic_or)
27 ATOMIC_OP(atomic_xor)
28 ATOMIC_OP(atomic_add)
29 ATOMIC_OP(atomic_and)
30 ATOMIC_OP(atomic_sub)
31
32 #undef ATOMIC_OP
33
34 #define ATOMIC_FETCH_OP(name, op) \
35 static __always_inline int arch_##op##name(int i, atomic_t *v) \
36 { \
37 return __lse_ll_sc_body(op##name, i, v); \
38 }
39
40 #define ATOMIC_FETCH_OPS(op) \
41 ATOMIC_FETCH_OP(_relaxed, op) \
42 ATOMIC_FETCH_OP(_acquire, op) \
43 ATOMIC_FETCH_OP(_release, op) \
44 ATOMIC_FETCH_OP( , op)
45
46 ATOMIC_FETCH_OPS(atomic_fetch_andnot)
47 ATOMIC_FETCH_OPS(atomic_fetch_or)
48 ATOMIC_FETCH_OPS(atomic_fetch_xor)
49 ATOMIC_FETCH_OPS(atomic_fetch_add)
50 ATOMIC_FETCH_OPS(atomic_fetch_and)
51 ATOMIC_FETCH_OPS(atomic_fetch_sub)
52 ATOMIC_FETCH_OPS(atomic_add_return)
53 ATOMIC_FETCH_OPS(atomic_sub_return)
54
55 #undef ATOMIC_FETCH_OP
56 #undef ATOMIC_FETCH_OPS
57
58 #define ATOMIC64_OP(op) \
59 static __always_inline void arch_##op(long i, atomic64_t *v) \
60 { \
61 __lse_ll_sc_body(op, i, v); \
62 }
63
64 ATOMIC64_OP(atomic64_andnot)
65 ATOMIC64_OP(atomic64_or)
66 ATOMIC64_OP(atomic64_xor)
67 ATOMIC64_OP(atomic64_add)
68 ATOMIC64_OP(atomic64_and)
69 ATOMIC64_OP(atomic64_sub)
70
71 #undef ATOMIC64_OP
72
73 #define ATOMIC64_FETCH_OP(name, op) \
74 static __always_inline long arch_##op##name(long i, atomic64_t *v) \
75 { \
76 return __lse_ll_sc_body(op##name, i, v); \
77 }
78
79 #define ATOMIC64_FETCH_OPS(op) \
80 ATOMIC64_FETCH_OP(_relaxed, op) \
81 ATOMIC64_FETCH_OP(_acquire, op) \
82 ATOMIC64_FETCH_OP(_release, op) \
83 ATOMIC64_FETCH_OP( , op)
84
85 ATOMIC64_FETCH_OPS(atomic64_fetch_andnot)
86 ATOMIC64_FETCH_OPS(atomic64_fetch_or)
87 ATOMIC64_FETCH_OPS(atomic64_fetch_xor)
88 ATOMIC64_FETCH_OPS(atomic64_fetch_add)
89 ATOMIC64_FETCH_OPS(atomic64_fetch_and)
90 ATOMIC64_FETCH_OPS(atomic64_fetch_sub)
91 ATOMIC64_FETCH_OPS(atomic64_add_return)
92 ATOMIC64_FETCH_OPS(atomic64_sub_return)
93
94 #undef ATOMIC64_FETCH_OP
95 #undef ATOMIC64_FETCH_OPS
96
97 static __always_inline long arch_atomic64_dec_if_positive(atomic64_t *v)
98 {
99 return __lse_ll_sc_body(atomic64_dec_if_positive, v);
100 }
101
102 #define arch_atomic_read(v) __READ_ONCE((v)->counter)
103 #define arch_atomic_set(v, i) __WRITE_ONCE(((v)->counter), (i))
104
105 #define arch_atomic_add_return_relaxed arch_atomic_add_return_relaxed
106 #define arch_atomic_add_return_acquire arch_atomic_add_return_acquire
107 #define arch_atomic_add_return_release arch_atomic_add_return_release
108 #define arch_atomic_add_return arch_atomic_add_return
109
110 #define arch_atomic_sub_return_relaxed arch_atomic_sub_return_relaxed
111 #define arch_atomic_sub_return_acquire arch_atomic_sub_return_acquire
112 #define arch_atomic_sub_return_release arch_atomic_sub_return_release
113 #define arch_atomic_sub_return arch_atomic_sub_return
114
115 #define arch_atomic_fetch_add_relaxed arch_atomic_fetch_add_relaxed
116 #define arch_atomic_fetch_add_acquire arch_atomic_fetch_add_acquire
117 #define arch_atomic_fetch_add_release arch_atomic_fetch_add_release
118 #define arch_atomic_fetch_add arch_atomic_fetch_add
119
120 #define arch_atomic_fetch_sub_relaxed arch_atomic_fetch_sub_relaxed
121 #define arch_atomic_fetch_sub_acquire arch_atomic_fetch_sub_acquire
122 #define arch_atomic_fetch_sub_release arch_atomic_fetch_sub_release
123 #define arch_atomic_fetch_sub arch_atomic_fetch_sub
124
125 #define arch_atomic_fetch_and_relaxed arch_atomic_fetch_and_relaxed
126 #define arch_atomic_fetch_and_acquire arch_atomic_fetch_and_acquire
127 #define arch_atomic_fetch_and_release arch_atomic_fetch_and_release
128 #define arch_atomic_fetch_and arch_atomic_fetch_and
129
130 #define arch_atomic_fetch_andnot_relaxed arch_atomic_fetch_andnot_relaxed
131 #define arch_atomic_fetch_andnot_acquire arch_atomic_fetch_andnot_acquire
132 #define arch_atomic_fetch_andnot_release arch_atomic_fetch_andnot_release
133 #define arch_atomic_fetch_andnot arch_atomic_fetch_andnot
134
135 #define arch_atomic_fetch_or_relaxed arch_atomic_fetch_or_relaxed
136 #define arch_atomic_fetch_or_acquire arch_atomic_fetch_or_acquire
137 #define arch_atomic_fetch_or_release arch_atomic_fetch_or_release
138 #define arch_atomic_fetch_or arch_atomic_fetch_or
139
140 #define arch_atomic_fetch_xor_relaxed arch_atomic_fetch_xor_relaxed
141 #define arch_atomic_fetch_xor_acquire arch_atomic_fetch_xor_acquire
142 #define arch_atomic_fetch_xor_release arch_atomic_fetch_xor_release
143 #define arch_atomic_fetch_xor arch_atomic_fetch_xor
144
145 #define arch_atomic_xchg_relaxed(v, new) \
146 arch_xchg_relaxed(&((v)->counter), (new))
147 #define arch_atomic_xchg_acquire(v, new) \
148 arch_xchg_acquire(&((v)->counter), (new))
149 #define arch_atomic_xchg_release(v, new) \
150 arch_xchg_release(&((v)->counter), (new))
151 #define arch_atomic_xchg(v, new) \
152 arch_xchg(&((v)->counter), (new))
153
154 #define arch_atomic_cmpxchg_relaxed(v, old, new) \
155 arch_cmpxchg_relaxed(&((v)->counter), (old), (new))
156 #define arch_atomic_cmpxchg_acquire(v, old, new) \
157 arch_cmpxchg_acquire(&((v)->counter), (old), (new))
158 #define arch_atomic_cmpxchg_release(v, old, new) \
159 arch_cmpxchg_release(&((v)->counter), (old), (new))
160 #define arch_atomic_cmpxchg(v, old, new) \
161 arch_cmpxchg(&((v)->counter), (old), (new))
162
163 #define arch_atomic_andnot arch_atomic_andnot
164
165 /*
166 * 64-bit arch_atomic operations.
167 */
168 #define ATOMIC64_INIT ATOMIC_INIT
169 #define arch_atomic64_read arch_atomic_read
170 #define arch_atomic64_set arch_atomic_set
171
172 #define arch_atomic64_add_return_relaxed arch_atomic64_add_return_relaxed
173 #define arch_atomic64_add_return_acquire arch_atomic64_add_return_acquire
174 #define arch_atomic64_add_return_release arch_atomic64_add_return_release
175 #define arch_atomic64_add_return arch_atomic64_add_return
176
177 #define arch_atomic64_sub_return_relaxed arch_atomic64_sub_return_relaxed
178 #define arch_atomic64_sub_return_acquire arch_atomic64_sub_return_acquire
179 #define arch_atomic64_sub_return_release arch_atomic64_sub_return_release
180 #define arch_atomic64_sub_return arch_atomic64_sub_return
181
182 #define arch_atomic64_fetch_add_relaxed arch_atomic64_fetch_add_relaxed
183 #define arch_atomic64_fetch_add_acquire arch_atomic64_fetch_add_acquire
184 #define arch_atomic64_fetch_add_release arch_atomic64_fetch_add_release
185 #define arch_atomic64_fetch_add arch_atomic64_fetch_add
186
187 #define arch_atomic64_fetch_sub_relaxed arch_atomic64_fetch_sub_relaxed
188 #define arch_atomic64_fetch_sub_acquire arch_atomic64_fetch_sub_acquire
189 #define arch_atomic64_fetch_sub_release arch_atomic64_fetch_sub_release
190 #define arch_atomic64_fetch_sub arch_atomic64_fetch_sub
191
192 #define arch_atomic64_fetch_and_relaxed arch_atomic64_fetch_and_relaxed
193 #define arch_atomic64_fetch_and_acquire arch_atomic64_fetch_and_acquire
194 #define arch_atomic64_fetch_and_release arch_atomic64_fetch_and_release
195 #define arch_atomic64_fetch_and arch_atomic64_fetch_and
196
197 #define arch_atomic64_fetch_andnot_relaxed arch_atomic64_fetch_andnot_relaxed
198 #define arch_atomic64_fetch_andnot_acquire arch_atomic64_fetch_andnot_acquire
199 #define arch_atomic64_fetch_andnot_release arch_atomic64_fetch_andnot_release
200 #define arch_atomic64_fetch_andnot arch_atomic64_fetch_andnot
201
202 #define arch_atomic64_fetch_or_relaxed arch_atomic64_fetch_or_relaxed
203 #define arch_atomic64_fetch_or_acquire arch_atomic64_fetch_or_acquire
204 #define arch_atomic64_fetch_or_release arch_atomic64_fetch_or_release
205 #define arch_atomic64_fetch_or arch_atomic64_fetch_or
206
207 #define arch_atomic64_fetch_xor_relaxed arch_atomic64_fetch_xor_relaxed
208 #define arch_atomic64_fetch_xor_acquire arch_atomic64_fetch_xor_acquire
209 #define arch_atomic64_fetch_xor_release arch_atomic64_fetch_xor_release
210 #define arch_atomic64_fetch_xor arch_atomic64_fetch_xor
211
212 #define arch_atomic64_xchg_relaxed arch_atomic_xchg_relaxed
213 #define arch_atomic64_xchg_acquire arch_atomic_xchg_acquire
214 #define arch_atomic64_xchg_release arch_atomic_xchg_release
215 #define arch_atomic64_xchg arch_atomic_xchg
216
217 #define arch_atomic64_cmpxchg_relaxed arch_atomic_cmpxchg_relaxed
218 #define arch_atomic64_cmpxchg_acquire arch_atomic_cmpxchg_acquire
219 #define arch_atomic64_cmpxchg_release arch_atomic_cmpxchg_release
220 #define arch_atomic64_cmpxchg arch_atomic_cmpxchg
221
222 #define arch_atomic64_andnot arch_atomic64_andnot
223
224 #define arch_atomic64_dec_if_positive arch_atomic64_dec_if_positive
225
226 #define ARCH_ATOMIC
227
228 #endif /* __ASM_ATOMIC_H */
229