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 ATOMIC_INIT(i) { (i) }
16 #define ATOMIC64_INIT(i) { (i) }
17
18 #define atomic_read(v) READ_ONCE((v)->counter)
19 #define atomic64_read(v) READ_ONCE((v)->counter)
20
21 #define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i))
22 #define atomic64_set(v, i) WRITE_ONCE(((v)->counter), (i))
23
24 #define ATOMIC_OP(op) \
25 void atomic_##op(int, atomic_t *); \
26 void atomic64_##op(s64, atomic64_t *);
27
28 #define ATOMIC_OP_RETURN(op) \
29 int atomic_##op##_return(int, atomic_t *); \
30 s64 atomic64_##op##_return(s64, atomic64_t *);
31
32 #define ATOMIC_FETCH_OP(op) \
33 int atomic_fetch_##op(int, atomic_t *); \
34 s64 atomic64_fetch_##op(s64, atomic64_t *);
35
36 #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
37
38 ATOMIC_OPS(add)
ATOMIC_OPS(sub)39 ATOMIC_OPS(sub)
40
41 #undef ATOMIC_OPS
42 #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
43
44 ATOMIC_OPS(and)
45 ATOMIC_OPS(or)
46 ATOMIC_OPS(xor)
47
48 #undef ATOMIC_OPS
49 #undef ATOMIC_FETCH_OP
50 #undef ATOMIC_OP_RETURN
51 #undef ATOMIC_OP
52
53 #define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n)))
54
55 static inline int atomic_xchg(atomic_t *v, int new)
56 {
57 return xchg(&v->counter, new);
58 }
59
60 #define atomic64_cmpxchg(v, o, n) \
61 ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n)))
62 #define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
63
64 s64 atomic64_dec_if_positive(atomic64_t *v);
65 #define atomic64_dec_if_positive atomic64_dec_if_positive
66
67 #endif /* !(__ARCH_SPARC64_ATOMIC__) */
68