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 #endif /* __ASM_ATOMIC_H */
227