1 /*- 2 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _OPENSOLARIS_SYS_ATOMIC_H_ 30 #define _OPENSOLARIS_SYS_ATOMIC_H_ 31 32 #include <sys/types.h> 33 #include <machine/atomic.h> 34 35 #define casptr(_a, _b, _c) \ 36 atomic_cmpset_ptr((volatile uintptr_t *)(_a), (uintptr_t)(_b), (uintptr_t) (_c)) 37 #define cas32 atomic_cmpset_32 38 39 #if defined(__i386__) && (defined(_KERNEL) || defined(KLD_MODULE)) 40 #define I386_HAVE_ATOMIC64 41 #endif 42 43 #if !defined(__LP64__) && !defined(__mips_n32) && \ 44 !defined(ARM_HAVE_ATOMIC64) && !defined(I386_HAVE_ATOMIC64) 45 extern void atomic_add_64(volatile uint64_t *target, int64_t delta); 46 extern void atomic_dec_64(volatile uint64_t *target); 47 #endif 48 #ifndef __sparc64__ 49 extern uint32_t atomic_cas_32(volatile uint32_t *target, uint32_t cmp, 50 uint32_t newval); 51 extern uint64_t atomic_cas_64(volatile uint64_t *target, uint64_t cmp, 52 uint64_t newval); 53 #endif 54 extern uint64_t atomic_add_64_nv(volatile uint64_t *target, int64_t delta); 55 extern uint8_t atomic_or_8_nv(volatile uint8_t *target, uint8_t value); 56 extern void membar_producer(void); 57 58 #if defined(__sparc64__) || defined(__powerpc__) || defined(__arm__) || \ 59 defined(__mips__) || defined(__aarch64__) || defined(__riscv) 60 extern void atomic_or_8(volatile uint8_t *target, uint8_t value); 61 #else 62 static __inline void 63 atomic_or_8(volatile uint8_t *target, uint8_t value) 64 { 65 atomic_set_8(target, value); 66 } 67 #endif 68 69 static __inline uint32_t 70 atomic_add_32_nv(volatile uint32_t *target, int32_t delta) 71 { 72 return (atomic_fetchadd_32(target, delta) + delta); 73 } 74 75 static __inline u_int 76 atomic_add_int_nv(volatile u_int *target, int delta) 77 { 78 return (atomic_add_32_nv(target, delta)); 79 } 80 81 static __inline void 82 atomic_dec_32(volatile uint32_t *target) 83 { 84 atomic_subtract_32(target, 1); 85 } 86 87 static __inline uint32_t 88 atomic_dec_32_nv(volatile uint32_t *target) 89 { 90 return (atomic_fetchadd_32(target, -1) - 1); 91 } 92 93 #if defined(__LP64__) || defined(__mips_n32) || \ 94 defined(ARM_HAVE_ATOMIC64) || defined(I386_HAVE_ATOMIC64) 95 static __inline void 96 atomic_dec_64(volatile uint64_t *target) 97 { 98 atomic_subtract_64(target, 1); 99 } 100 #endif 101 102 static __inline void 103 atomic_inc_32(volatile uint32_t *target) 104 { 105 atomic_add_32(target, 1); 106 } 107 108 static __inline uint32_t 109 atomic_inc_32_nv(volatile uint32_t *target) 110 { 111 return (atomic_add_32_nv(target, 1)); 112 } 113 114 static __inline void 115 atomic_inc_64(volatile uint64_t *target) 116 { 117 atomic_add_64(target, 1); 118 } 119 120 static __inline uint64_t 121 atomic_inc_64_nv(volatile uint64_t *target) 122 { 123 return (atomic_add_64_nv(target, 1)); 124 } 125 126 static __inline uint64_t 127 atomic_dec_64_nv(volatile uint64_t *target) 128 { 129 return (atomic_add_64_nv(target, -1)); 130 } 131 132 #if !defined(COMPAT_32BIT) && defined(__LP64__) 133 static __inline void * 134 atomic_cas_ptr(volatile void *target, void *cmp, void *newval) 135 { 136 return ((void *)atomic_cas_64((volatile uint64_t *)target, 137 (uint64_t)cmp, (uint64_t)newval)); 138 } 139 #else 140 static __inline void * 141 atomic_cas_ptr(volatile void *target, void *cmp, void *newval) 142 { 143 return ((void *)atomic_cas_32((volatile uint32_t *)target, 144 (uint32_t)cmp, (uint32_t)newval)); 145 } 146 #endif /* !defined(COMPAT_32BIT) && defined(__LP64__) */ 147 148 #endif /* !_OPENSOLARIS_SYS_ATOMIC_H_ */ 149