1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /* atomic.h: Thankfully the V9 is at least reasonable for this
3*4882a593Smuzhiyun * stuff.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 1996, 1997, 2000, 2012 David S. Miller (davem@redhat.com)
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifndef __ARCH_SPARC64_ATOMIC__
9*4882a593Smuzhiyun #define __ARCH_SPARC64_ATOMIC__
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <linux/types.h>
12*4882a593Smuzhiyun #include <asm/cmpxchg.h>
13*4882a593Smuzhiyun #include <asm/barrier.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #define ATOMIC64_INIT(i) { (i) }
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #define atomic_read(v) READ_ONCE((v)->counter)
18*4882a593Smuzhiyun #define atomic64_read(v) READ_ONCE((v)->counter)
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i))
21*4882a593Smuzhiyun #define atomic64_set(v, i) WRITE_ONCE(((v)->counter), (i))
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #define ATOMIC_OP(op) \
24*4882a593Smuzhiyun void atomic_##op(int, atomic_t *); \
25*4882a593Smuzhiyun void atomic64_##op(s64, atomic64_t *);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun #define ATOMIC_OP_RETURN(op) \
28*4882a593Smuzhiyun int atomic_##op##_return(int, atomic_t *); \
29*4882a593Smuzhiyun s64 atomic64_##op##_return(s64, atomic64_t *);
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun #define ATOMIC_FETCH_OP(op) \
32*4882a593Smuzhiyun int atomic_fetch_##op(int, atomic_t *); \
33*4882a593Smuzhiyun s64 atomic64_fetch_##op(s64, atomic64_t *);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun ATOMIC_OPS(add)
ATOMIC_OPS(sub)38*4882a593Smuzhiyun ATOMIC_OPS(sub)
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun #undef ATOMIC_OPS
41*4882a593Smuzhiyun #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun ATOMIC_OPS(and)
44*4882a593Smuzhiyun ATOMIC_OPS(or)
45*4882a593Smuzhiyun ATOMIC_OPS(xor)
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun #undef ATOMIC_OPS
48*4882a593Smuzhiyun #undef ATOMIC_FETCH_OP
49*4882a593Smuzhiyun #undef ATOMIC_OP_RETURN
50*4882a593Smuzhiyun #undef ATOMIC_OP
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun #define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n)))
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun static inline int atomic_xchg(atomic_t *v, int new)
55*4882a593Smuzhiyun {
56*4882a593Smuzhiyun return xchg(&v->counter, new);
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun #define atomic64_cmpxchg(v, o, n) \
60*4882a593Smuzhiyun ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n)))
61*4882a593Smuzhiyun #define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun s64 atomic64_dec_if_positive(atomic64_t *v);
64*4882a593Smuzhiyun #define atomic64_dec_if_positive atomic64_dec_if_positive
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun #endif /* !(__ARCH_SPARC64_ATOMIC__) */
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