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