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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
f5e706ad SR |
2 | /* atomic.h: These still suck, but the I-cache hit rate is higher. |
3 | * | |
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) | |
7 | * | |
8 | * Additions by Keith M Wesolowski (wesolows@foobazco.org) based | |
9 | * on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>. | |
10 | */ | |
11 | ||
12 | #ifndef __ARCH_SPARC_ATOMIC__ | |
13 | #define __ARCH_SPARC_ATOMIC__ | |
14 | ||
15 | #include <linux/types.h> | |
16 | ||
d550bbd4 | 17 | #include <asm/cmpxchg.h> |
56d36489 | 18 | #include <asm/barrier.h> |
aea1181b SR |
19 | #include <asm-generic/atomic64.h> |
20 | ||
f5e706ad SR |
21 | #define ATOMIC_INIT(i) { (i) } |
22 | ||
4f3316c2 | 23 | int atomic_add_return(int, atomic_t *); |
3a1adb23 PZ |
24 | int atomic_fetch_add(int, atomic_t *); |
25 | int atomic_fetch_and(int, atomic_t *); | |
26 | int atomic_fetch_or(int, atomic_t *); | |
27 | int atomic_fetch_xor(int, atomic_t *); | |
f05a6865 | 28 | int atomic_cmpxchg(atomic_t *, int, int); |
1a17fdc4 | 29 | int atomic_xchg(atomic_t *, int); |
f05a6865 SR |
30 | int __atomic_add_unless(atomic_t *, int, int); |
31 | void atomic_set(atomic_t *, int); | |
f5e706ad | 32 | |
9d664c0a PZ |
33 | #define atomic_set_release(v, i) atomic_set((v), (i)) |
34 | ||
2291059c | 35 | #define atomic_read(v) ACCESS_ONCE((v)->counter) |
f5e706ad | 36 | |
4f3316c2 PZ |
37 | #define atomic_add(i, v) ((void)atomic_add_return( (int)(i), (v))) |
38 | #define atomic_sub(i, v) ((void)atomic_add_return(-(int)(i), (v))) | |
39 | #define atomic_inc(v) ((void)atomic_add_return( 1, (v))) | |
40 | #define atomic_dec(v) ((void)atomic_add_return( -1, (v))) | |
f5e706ad | 41 | |
3a1adb23 PZ |
42 | #define atomic_and(i, v) ((void)atomic_fetch_and((i), (v))) |
43 | #define atomic_or(i, v) ((void)atomic_fetch_or((i), (v))) | |
44 | #define atomic_xor(i, v) ((void)atomic_fetch_xor((i), (v))) | |
45 | ||
4f3316c2 | 46 | #define atomic_sub_return(i, v) (atomic_add_return(-(int)(i), (v))) |
3a1adb23 PZ |
47 | #define atomic_fetch_sub(i, v) (atomic_fetch_add (-(int)(i), (v))) |
48 | ||
4f3316c2 PZ |
49 | #define atomic_inc_return(v) (atomic_add_return( 1, (v))) |
50 | #define atomic_dec_return(v) (atomic_add_return( -1, (v))) | |
f5e706ad SR |
51 | |
52 | #define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) | |
53 | ||
54 | /* | |
55 | * atomic_inc_and_test - increment and test | |
56 | * @v: pointer of type atomic_t | |
57 | * | |
58 | * Atomically increments @v by 1 | |
59 | * and returns true if the result is zero, or false for all | |
60 | * other cases. | |
61 | */ | |
62 | #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) | |
63 | ||
64 | #define atomic_dec_and_test(v) (atomic_dec_return(v) == 0) | |
65 | #define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0) | |
66 | ||
f5e706ad | 67 | #endif /* !(__ARCH_SPARC_ATOMIC__) */ |