arch/arm64/include/asm/atomic.h

   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 */