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) \
24 void atomic_##op(int, atomic_t *); \
25 void atomic64_##op(s64, atomic64_t *);
26
27 #define ATOMIC_OP_RETURN(op) \
28 int atomic_##op##_return(int, atomic_t *); \
29 s64 atomic64_##op##_return(s64, atomic64_t *);
30
31 #define ATOMIC_FETCH_OP(op) \
32 int atomic_fetch_##op(int, atomic_t *); \
33 s64 atomic64_fetch_##op(s64, atomic64_t *);
34
35 #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
36
37 ATOMIC_OPS(add)
ATOMIC_OPS(sub)38 ATOMIC_OPS(sub)
39
40 #undef ATOMIC_OPS
41 #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
42
43 ATOMIC_OPS(and)
44 ATOMIC_OPS(or)
45 ATOMIC_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
54 static 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
63 s64 atomic64_dec_if_positive(atomic64_t *v);
64 #define atomic64_dec_if_positive atomic64_dec_if_positive
65
66 #endif /* !(__ARCH_SPARC64_ATOMIC__) */
67