1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* atomic.h: These still suck, but the I-cache hit rate is higher.
4 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
5 * Copyright (C) 2000 Anton Blanchard (anton@linuxcare.com.au)
6 * Copyright (C) 2007 Kyle McMartin (kyle@parisc-linux.org)
8 * Additions by Keith M Wesolowski (wesolows@foobazco.org) based
9 * on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>.
12 #ifndef __ARCH_SPARC_ATOMIC__
13 #define __ARCH_SPARC_ATOMIC__
15 #include <linux/types.h>
17 #include <asm/cmpxchg.h>
18 #include <asm/barrier.h>
19 #include <asm-generic/atomic64.h>
21 int arch_atomic_add_return(int, atomic_t *);
22 int arch_atomic_fetch_add(int, atomic_t *);
23 int arch_atomic_fetch_and(int, atomic_t *);
24 int arch_atomic_fetch_or(int, atomic_t *);
25 int arch_atomic_fetch_xor(int, atomic_t *);
26 int arch_atomic_cmpxchg(atomic_t *, int, int);
27 int arch_atomic_xchg(atomic_t *, int);
28 int arch_atomic_fetch_add_unless(atomic_t *, int, int);
29 void arch_atomic_set(atomic_t *, int);
31 #define arch_atomic_fetch_add_unless arch_atomic_fetch_add_unless
33 #define arch_atomic_set_release(v, i) arch_atomic_set((v), (i))
35 #define arch_atomic_read(v) READ_ONCE((v)->counter)
37 #define arch_atomic_add(i, v) ((void)arch_atomic_add_return( (int)(i), (v)))
38 #define arch_atomic_sub(i, v) ((void)arch_atomic_add_return(-(int)(i), (v)))
40 #define arch_atomic_and(i, v) ((void)arch_atomic_fetch_and((i), (v)))
41 #define arch_atomic_or(i, v) ((void)arch_atomic_fetch_or((i), (v)))
42 #define arch_atomic_xor(i, v) ((void)arch_atomic_fetch_xor((i), (v)))
44 #define arch_atomic_sub_return(i, v) (arch_atomic_add_return(-(int)(i), (v)))
45 #define arch_atomic_fetch_sub(i, v) (arch_atomic_fetch_add (-(int)(i), (v)))
47 #endif /* !(__ARCH_SPARC_ATOMIC__) */