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)
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_andnot arch_atomic_andnot
146
147 /*
148 * 64-bit arch_atomic operations.
149 */
150 #define ATOMIC64_INIT ATOMIC_INIT
151 #define arch_atomic64_read arch_atomic_read
152 #define arch_atomic64_set arch_atomic_set
153
154 #define arch_atomic64_add_return_relaxed arch_atomic64_add_return_relaxed
155 #define arch_atomic64_add_return_acquire arch_atomic64_add_return_acquire
156 #define arch_atomic64_add_return_release arch_atomic64_add_return_release
157 #define arch_atomic64_add_return arch_atomic64_add_return
158
159 #define arch_atomic64_sub_return_relaxed arch_atomic64_sub_return_relaxed
160 #define arch_atomic64_sub_return_acquire arch_atomic64_sub_return_acquire
161 #define arch_atomic64_sub_return_release arch_atomic64_sub_return_release
162 #define arch_atomic64_sub_return arch_atomic64_sub_return
163
164 #define arch_atomic64_fetch_add_relaxed arch_atomic64_fetch_add_relaxed
165 #define arch_atomic64_fetch_add_acquire arch_atomic64_fetch_add_acquire
166 #define arch_atomic64_fetch_add_release arch_atomic64_fetch_add_release
167 #define arch_atomic64_fetch_add arch_atomic64_fetch_add
168
169 #define arch_atomic64_fetch_sub_relaxed arch_atomic64_fetch_sub_relaxed
170 #define arch_atomic64_fetch_sub_acquire arch_atomic64_fetch_sub_acquire
171 #define arch_atomic64_fetch_sub_release arch_atomic64_fetch_sub_release
172 #define arch_atomic64_fetch_sub arch_atomic64_fetch_sub
173
174 #define arch_atomic64_fetch_and_relaxed arch_atomic64_fetch_and_relaxed
175 #define arch_atomic64_fetch_and_acquire arch_atomic64_fetch_and_acquire
176 #define arch_atomic64_fetch_and_release arch_atomic64_fetch_and_release
177 #define arch_atomic64_fetch_and arch_atomic64_fetch_and
178
179 #define arch_atomic64_fetch_andnot_relaxed arch_atomic64_fetch_andnot_relaxed
180 #define arch_atomic64_fetch_andnot_acquire arch_atomic64_fetch_andnot_acquire
181 #define arch_atomic64_fetch_andnot_release arch_atomic64_fetch_andnot_release
182 #define arch_atomic64_fetch_andnot arch_atomic64_fetch_andnot
183
184 #define arch_atomic64_fetch_or_relaxed arch_atomic64_fetch_or_relaxed
185 #define arch_atomic64_fetch_or_acquire arch_atomic64_fetch_or_acquire
186 #define arch_atomic64_fetch_or_release arch_atomic64_fetch_or_release
187 #define arch_atomic64_fetch_or arch_atomic64_fetch_or
188
189 #define arch_atomic64_fetch_xor_relaxed arch_atomic64_fetch_xor_relaxed
190 #define arch_atomic64_fetch_xor_acquire arch_atomic64_fetch_xor_acquire
191 #define arch_atomic64_fetch_xor_release arch_atomic64_fetch_xor_release
192 #define arch_atomic64_fetch_xor arch_atomic64_fetch_xor
193
194 #define arch_atomic64_andnot arch_atomic64_andnot
195
196 #define arch_atomic64_dec_if_positive arch_atomic64_dec_if_positive
197
198 #endif /* __ASM_ATOMIC_H */
199
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