xref: /openbmc/linux/arch/arm64/include/asm/atomic.h (revision 958ef1e3)
1 /*
2  * Based on arch/arm/include/asm/atomic.h
3  *
4  * Copyright (C) 1996 Russell King.
5  * Copyright (C) 2002 Deep Blue Solutions Ltd.
6  * Copyright (C) 2012 ARM Ltd.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
19  */
20 #ifndef __ASM_ATOMIC_H
21 #define __ASM_ATOMIC_H
22 
23 #include <linux/compiler.h>
24 #include <linux/types.h>
25 
26 #include <asm/barrier.h>
27 #include <asm/lse.h>
28 
29 #ifdef __KERNEL__
30 
31 #define __ARM64_IN_ATOMIC_IMPL
32 
33 #if defined(CONFIG_ARM64_LSE_ATOMICS) && defined(CONFIG_AS_LSE)
34 #include <asm/atomic_lse.h>
35 #else
36 #include <asm/atomic_ll_sc.h>
37 #endif
38 
39 #undef __ARM64_IN_ATOMIC_IMPL
40 
41 #include <asm/cmpxchg.h>
42 
43 #define ATOMIC_INIT(i)	{ (i) }
44 
45 #define atomic_read(v)			READ_ONCE((v)->counter)
46 #define atomic_set(v, i)		WRITE_ONCE(((v)->counter), (i))
47 
48 #define atomic_add_return_relaxed	atomic_add_return_relaxed
49 #define atomic_add_return_acquire	atomic_add_return_acquire
50 #define atomic_add_return_release	atomic_add_return_release
51 #define atomic_add_return		atomic_add_return
52 
53 #define atomic_sub_return_relaxed	atomic_sub_return_relaxed
54 #define atomic_sub_return_acquire	atomic_sub_return_acquire
55 #define atomic_sub_return_release	atomic_sub_return_release
56 #define atomic_sub_return		atomic_sub_return
57 
58 #define atomic_fetch_add_relaxed	atomic_fetch_add_relaxed
59 #define atomic_fetch_add_acquire	atomic_fetch_add_acquire
60 #define atomic_fetch_add_release	atomic_fetch_add_release
61 #define atomic_fetch_add		atomic_fetch_add
62 
63 #define atomic_fetch_sub_relaxed	atomic_fetch_sub_relaxed
64 #define atomic_fetch_sub_acquire	atomic_fetch_sub_acquire
65 #define atomic_fetch_sub_release	atomic_fetch_sub_release
66 #define atomic_fetch_sub		atomic_fetch_sub
67 
68 #define atomic_fetch_and_relaxed	atomic_fetch_and_relaxed
69 #define atomic_fetch_and_acquire	atomic_fetch_and_acquire
70 #define atomic_fetch_and_release	atomic_fetch_and_release
71 #define atomic_fetch_and		atomic_fetch_and
72 
73 #define atomic_fetch_andnot_relaxed	atomic_fetch_andnot_relaxed
74 #define atomic_fetch_andnot_acquire	atomic_fetch_andnot_acquire
75 #define atomic_fetch_andnot_release	atomic_fetch_andnot_release
76 #define atomic_fetch_andnot		atomic_fetch_andnot
77 
78 #define atomic_fetch_or_relaxed		atomic_fetch_or_relaxed
79 #define atomic_fetch_or_acquire		atomic_fetch_or_acquire
80 #define atomic_fetch_or_release		atomic_fetch_or_release
81 #define atomic_fetch_or			atomic_fetch_or
82 
83 #define atomic_fetch_xor_relaxed	atomic_fetch_xor_relaxed
84 #define atomic_fetch_xor_acquire	atomic_fetch_xor_acquire
85 #define atomic_fetch_xor_release	atomic_fetch_xor_release
86 #define atomic_fetch_xor		atomic_fetch_xor
87 
88 #define atomic_xchg_relaxed(v, new)	xchg_relaxed(&((v)->counter), (new))
89 #define atomic_xchg_acquire(v, new)	xchg_acquire(&((v)->counter), (new))
90 #define atomic_xchg_release(v, new)	xchg_release(&((v)->counter), (new))
91 #define atomic_xchg(v, new)		xchg(&((v)->counter), (new))
92 
93 #define atomic_cmpxchg_relaxed(v, old, new)				\
94 	cmpxchg_relaxed(&((v)->counter), (old), (new))
95 #define atomic_cmpxchg_acquire(v, old, new)				\
96 	cmpxchg_acquire(&((v)->counter), (old), (new))
97 #define atomic_cmpxchg_release(v, old, new)				\
98 	cmpxchg_release(&((v)->counter), (old), (new))
99 #define atomic_cmpxchg(v, old, new)	cmpxchg(&((v)->counter), (old), (new))
100 
101 #define atomic_andnot			atomic_andnot
102 
103 /*
104  * 64-bit atomic operations.
105  */
106 #define ATOMIC64_INIT			ATOMIC_INIT
107 #define atomic64_read			atomic_read
108 #define atomic64_set			atomic_set
109 
110 #define atomic64_add_return_relaxed	atomic64_add_return_relaxed
111 #define atomic64_add_return_acquire	atomic64_add_return_acquire
112 #define atomic64_add_return_release	atomic64_add_return_release
113 #define atomic64_add_return		atomic64_add_return
114 
115 #define atomic64_sub_return_relaxed	atomic64_sub_return_relaxed
116 #define atomic64_sub_return_acquire	atomic64_sub_return_acquire
117 #define atomic64_sub_return_release	atomic64_sub_return_release
118 #define atomic64_sub_return		atomic64_sub_return
119 
120 #define atomic64_fetch_add_relaxed	atomic64_fetch_add_relaxed
121 #define atomic64_fetch_add_acquire	atomic64_fetch_add_acquire
122 #define atomic64_fetch_add_release	atomic64_fetch_add_release
123 #define atomic64_fetch_add		atomic64_fetch_add
124 
125 #define atomic64_fetch_sub_relaxed	atomic64_fetch_sub_relaxed
126 #define atomic64_fetch_sub_acquire	atomic64_fetch_sub_acquire
127 #define atomic64_fetch_sub_release	atomic64_fetch_sub_release
128 #define atomic64_fetch_sub		atomic64_fetch_sub
129 
130 #define atomic64_fetch_and_relaxed	atomic64_fetch_and_relaxed
131 #define atomic64_fetch_and_acquire	atomic64_fetch_and_acquire
132 #define atomic64_fetch_and_release	atomic64_fetch_and_release
133 #define atomic64_fetch_and		atomic64_fetch_and
134 
135 #define atomic64_fetch_andnot_relaxed	atomic64_fetch_andnot_relaxed
136 #define atomic64_fetch_andnot_acquire	atomic64_fetch_andnot_acquire
137 #define atomic64_fetch_andnot_release	atomic64_fetch_andnot_release
138 #define atomic64_fetch_andnot		atomic64_fetch_andnot
139 
140 #define atomic64_fetch_or_relaxed	atomic64_fetch_or_relaxed
141 #define atomic64_fetch_or_acquire	atomic64_fetch_or_acquire
142 #define atomic64_fetch_or_release	atomic64_fetch_or_release
143 #define atomic64_fetch_or		atomic64_fetch_or
144 
145 #define atomic64_fetch_xor_relaxed	atomic64_fetch_xor_relaxed
146 #define atomic64_fetch_xor_acquire	atomic64_fetch_xor_acquire
147 #define atomic64_fetch_xor_release	atomic64_fetch_xor_release
148 #define atomic64_fetch_xor		atomic64_fetch_xor
149 
150 #define atomic64_xchg_relaxed		atomic_xchg_relaxed
151 #define atomic64_xchg_acquire		atomic_xchg_acquire
152 #define atomic64_xchg_release		atomic_xchg_release
153 #define atomic64_xchg			atomic_xchg
154 
155 #define atomic64_cmpxchg_relaxed	atomic_cmpxchg_relaxed
156 #define atomic64_cmpxchg_acquire	atomic_cmpxchg_acquire
157 #define atomic64_cmpxchg_release	atomic_cmpxchg_release
158 #define atomic64_cmpxchg		atomic_cmpxchg
159 
160 #define atomic64_andnot			atomic64_andnot
161 
162 #define atomic64_dec_if_positive	atomic64_dec_if_positive
163 
164 #endif
165 #endif
166