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