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: stable/11/sys/cddl/compat/opensolaris/sys/atomic.h 334762 2018-06-07 07:42:48Z hselasky $ 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) 45extern void atomic_add_64(volatile uint64_t *target, int64_t delta); 46extern void atomic_dec_64(volatile uint64_t *target); 47#endif 48#ifndef __sparc64__ 49extern uint32_t atomic_cas_32(volatile uint32_t *target, uint32_t cmp, 50 uint32_t newval); 51extern uint64_t atomic_cas_64(volatile uint64_t *target, uint64_t cmp, 52 uint64_t newval); 53#endif 54extern uint64_t atomic_add_64_nv(volatile uint64_t *target, int64_t delta); 55extern uint8_t atomic_or_8_nv(volatile uint8_t *target, uint8_t value); 56extern void membar_producer(void); 57 58#if defined(__sparc64__) || defined(__powerpc__) || defined(__arm__) || \ 59 defined(__mips__) || defined(__aarch64__) || defined(__riscv__) 60extern void atomic_or_8(volatile uint8_t *target, uint8_t value); 61#else 62static __inline void 63atomic_or_8(volatile uint8_t *target, uint8_t value) 64{ 65 atomic_set_8(target, value); 66} 67#endif 68 69static __inline uint32_t 70atomic_add_32_nv(volatile uint32_t *target, int32_t delta) 71{ 72 return (atomic_fetchadd_32(target, delta) + delta); 73} 74 75static __inline u_int 76atomic_add_int_nv(volatile u_int *target, int delta) 77{ 78 return (atomic_add_32_nv(target, delta)); 79} 80 81static __inline void 82atomic_dec_32(volatile uint32_t *target) 83{ 84 atomic_subtract_32(target, 1); 85} 86 87static __inline uint32_t 88atomic_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) 95static __inline void 96atomic_dec_64(volatile uint64_t *target) 97{ 98 atomic_subtract_64(target, 1); 99} 100#endif 101 102static __inline void 103atomic_inc_32(volatile uint32_t *target) 104{ 105 atomic_add_32(target, 1); 106} 107 108static __inline uint32_t 109atomic_inc_32_nv(volatile uint32_t *target) 110{ 111 return (atomic_add_32_nv(target, 1)); 112} 113 114static __inline void 115atomic_inc_64(volatile uint64_t *target) 116{ 117 atomic_add_64(target, 1); 118} 119 120static __inline uint64_t 121atomic_inc_64_nv(volatile uint64_t *target) 122{ 123 return (atomic_add_64_nv(target, 1)); 124} 125 126static __inline uint64_t 127atomic_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__) 133static __inline void * 134atomic_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 140static __inline void * 141atomic_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