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96f1050d | 1 | /* |
96956450 MF |
2 | * Copyright 2004-2009 Analog Devices Inc. |
3 | * | |
4 | * Licensed under the GPL-2 or later. | |
5 | */ | |
96f1050d | 6 | |
1394f032 BW |
7 | #ifndef __ARCH_BLACKFIN_ATOMIC__ |
8 | #define __ARCH_BLACKFIN_ATOMIC__ | |
9 | ||
3d150630 MF |
10 | #ifndef CONFIG_SMP |
11 | # include <asm-generic/atomic.h> | |
12 | #else | |
13 | ||
ea435467 | 14 | #include <linux/types.h> |
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15 | #include <asm/system.h> /* local_irq_XXX() */ |
16 | ||
17 | /* | |
18 | * Atomic operations that C can't guarantee us. Useful for | |
19 | * resource counting etc.. | |
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20 | */ |
21 | ||
1394f032 | 22 | #define ATOMIC_INIT(i) { (i) } |
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23 | #define atomic_set(v, i) (((v)->counter) = i) |
24 | ||
6b3087c6 GY |
25 | #define atomic_read(v) __raw_uncached_fetch_asm(&(v)->counter) |
26 | ||
27 | asmlinkage int __raw_uncached_fetch_asm(const volatile int *ptr); | |
28 | ||
29 | asmlinkage int __raw_atomic_update_asm(volatile int *ptr, int value); | |
30 | ||
31 | asmlinkage int __raw_atomic_clear_asm(volatile int *ptr, int value); | |
32 | ||
33 | asmlinkage int __raw_atomic_set_asm(volatile int *ptr, int value); | |
34 | ||
35 | asmlinkage int __raw_atomic_xor_asm(volatile int *ptr, int value); | |
36 | ||
37 | asmlinkage int __raw_atomic_test_asm(const volatile int *ptr, int value); | |
38 | ||
39 | static inline void atomic_add(int i, atomic_t *v) | |
40 | { | |
41 | __raw_atomic_update_asm(&v->counter, i); | |
42 | } | |
43 | ||
44 | static inline void atomic_sub(int i, atomic_t *v) | |
45 | { | |
46 | __raw_atomic_update_asm(&v->counter, -i); | |
47 | } | |
48 | ||
49 | static inline int atomic_add_return(int i, atomic_t *v) | |
50 | { | |
51 | return __raw_atomic_update_asm(&v->counter, i); | |
52 | } | |
53 | ||
54 | static inline int atomic_sub_return(int i, atomic_t *v) | |
55 | { | |
56 | return __raw_atomic_update_asm(&v->counter, -i); | |
57 | } | |
58 | ||
59 | static inline void atomic_inc(volatile atomic_t *v) | |
60 | { | |
61 | __raw_atomic_update_asm(&v->counter, 1); | |
62 | } | |
63 | ||
64 | static inline void atomic_dec(volatile atomic_t *v) | |
65 | { | |
66 | __raw_atomic_update_asm(&v->counter, -1); | |
67 | } | |
68 | ||
69 | static inline void atomic_clear_mask(int mask, atomic_t *v) | |
70 | { | |
71 | __raw_atomic_clear_asm(&v->counter, mask); | |
72 | } | |
73 | ||
74 | static inline void atomic_set_mask(int mask, atomic_t *v) | |
75 | { | |
76 | __raw_atomic_set_asm(&v->counter, mask); | |
77 | } | |
78 | ||
6b3087c6 GY |
79 | /* Atomic operations are already serializing */ |
80 | #define smp_mb__before_atomic_dec() barrier() | |
81 | #define smp_mb__after_atomic_dec() barrier() | |
82 | #define smp_mb__before_atomic_inc() barrier() | |
83 | #define smp_mb__after_atomic_inc() barrier() | |
84 | ||
6b3087c6 | 85 | #define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) |
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86 | #define atomic_dec_return(v) atomic_sub_return(1,(v)) |
87 | #define atomic_inc_return(v) atomic_add_return(1,(v)) | |
88 | ||
6b3087c6 GY |
89 | #define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) |
90 | #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) | |
91 | ||
92 | #define atomic_add_unless(v, a, u) \ | |
93 | ({ \ | |
94 | int c, old; \ | |
95 | c = atomic_read(v); \ | |
96 | while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \ | |
97 | c = old; \ | |
98 | c != (u); \ | |
99 | }) | |
6b3087c6 | 100 | |
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101 | /* |
102 | * atomic_inc_and_test - increment and test | |
103 | * @v: pointer of type atomic_t | |
104 | * | |
105 | * Atomically increments @v by 1 | |
106 | * and returns true if the result is zero, or false for all | |
107 | * other cases. | |
108 | */ | |
109 | #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) | |
110 | ||
111 | #define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0) | |
112 | #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) | |
113 | ||
72099ed2 | 114 | #include <asm-generic/atomic-long.h> |
1394f032 | 115 | |
3d150630 MF |
116 | #endif |
117 | ||
bee18beb MF |
118 | #include <asm-generic/atomic64.h> |
119 | ||
3d150630 | 120 | #endif |