1/* SPDX-License-Identifier: GPL-2.0 */
2/* atomic.h: Thankfully the V9 is at least reasonable for this
3 *           stuff.
4 *
5 * Copyright (C) 1996, 1997, 2000, 2012 David S. Miller (davem@redhat.com)
6 */
7
8#ifndef __ARCH_SPARC64_ATOMIC__
9#define __ARCH_SPARC64_ATOMIC__
10
11#include <linux/types.h>
12#include <asm/cmpxchg.h>
13#include <asm/barrier.h>
14
15#define ATOMIC64_INIT(i)	{ (i) }
16
17#define atomic_read(v)		READ_ONCE((v)->counter)
18#define atomic64_read(v)	READ_ONCE((v)->counter)
19
20#define atomic_set(v, i)	WRITE_ONCE(((v)->counter), (i))
21#define atomic64_set(v, i)	WRITE_ONCE(((v)->counter), (i))
22
23#define ATOMIC_OP(op)							\
24void atomic_##op(int, atomic_t *);					\
25void atomic64_##op(s64, atomic64_t *);
26
27#define ATOMIC_OP_RETURN(op)						\
28int atomic_##op##_return(int, atomic_t *);				\
29s64 atomic64_##op##_return(s64, atomic64_t *);
30
31#define ATOMIC_FETCH_OP(op)						\
32int atomic_fetch_##op(int, atomic_t *);					\
33s64 atomic64_fetch_##op(s64, atomic64_t *);
34
35#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
36
37ATOMIC_OPS(add)
38ATOMIC_OPS(sub)
39
40#undef ATOMIC_OPS
41#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
42
43ATOMIC_OPS(and)
44ATOMIC_OPS(or)
45ATOMIC_OPS(xor)
46
47#undef ATOMIC_OPS
48#undef ATOMIC_FETCH_OP
49#undef ATOMIC_OP_RETURN
50#undef ATOMIC_OP
51
52#define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n)))
53
54static inline int atomic_xchg(atomic_t *v, int new)
55{
56	return xchg(&v->counter, new);
57}
58
59#define atomic64_cmpxchg(v, o, n) \
60	((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n)))
61#define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
62
63s64 atomic64_dec_if_positive(atomic64_t *v);
64#define atomic64_dec_if_positive atomic64_dec_if_positive
65
66#endif /* !(__ARCH_SPARC64_ATOMIC__) */
67