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Diffstat (limited to 'include/asm-mn10300/atomic.h')
-rw-r--r-- | include/asm-mn10300/atomic.h | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/include/asm-mn10300/atomic.h b/include/asm-mn10300/atomic.h deleted file mode 100644 index bc064825f9b1..000000000000 --- a/include/asm-mn10300/atomic.h +++ /dev/null | |||
@@ -1,157 +0,0 @@ | |||
1 | /* MN10300 Atomic counter operations | ||
2 | * | ||
3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | ||
4 | * Written by David Howells (dhowells@redhat.com) | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU General Public Licence | ||
8 | * as published by the Free Software Foundation; either version | ||
9 | * 2 of the Licence, or (at your option) any later version. | ||
10 | */ | ||
11 | #ifndef _ASM_ATOMIC_H | ||
12 | #define _ASM_ATOMIC_H | ||
13 | |||
14 | #ifdef CONFIG_SMP | ||
15 | #error not SMP safe | ||
16 | #endif | ||
17 | |||
18 | /* | ||
19 | * Atomic operations that C can't guarantee us. Useful for | ||
20 | * resource counting etc.. | ||
21 | */ | ||
22 | |||
23 | #define ATOMIC_INIT(i) { (i) } | ||
24 | |||
25 | #ifdef __KERNEL__ | ||
26 | |||
27 | /** | ||
28 | * atomic_read - read atomic variable | ||
29 | * @v: pointer of type atomic_t | ||
30 | * | ||
31 | * Atomically reads the value of @v. Note that the guaranteed | ||
32 | * useful range of an atomic_t is only 24 bits. | ||
33 | */ | ||
34 | #define atomic_read(v) ((v)->counter) | ||
35 | |||
36 | /** | ||
37 | * atomic_set - set atomic variable | ||
38 | * @v: pointer of type atomic_t | ||
39 | * @i: required value | ||
40 | * | ||
41 | * Atomically sets the value of @v to @i. Note that the guaranteed | ||
42 | * useful range of an atomic_t is only 24 bits. | ||
43 | */ | ||
44 | #define atomic_set(v, i) (((v)->counter) = (i)) | ||
45 | |||
46 | #include <asm/system.h> | ||
47 | |||
48 | /** | ||
49 | * atomic_add_return - add integer to atomic variable | ||
50 | * @i: integer value to add | ||
51 | * @v: pointer of type atomic_t | ||
52 | * | ||
53 | * Atomically adds @i to @v and returns the result | ||
54 | * Note that the guaranteed useful range of an atomic_t is only 24 bits. | ||
55 | */ | ||
56 | static inline int atomic_add_return(int i, atomic_t *v) | ||
57 | { | ||
58 | unsigned long flags; | ||
59 | int temp; | ||
60 | |||
61 | local_irq_save(flags); | ||
62 | temp = v->counter; | ||
63 | temp += i; | ||
64 | v->counter = temp; | ||
65 | local_irq_restore(flags); | ||
66 | |||
67 | return temp; | ||
68 | } | ||
69 | |||
70 | /** | ||
71 | * atomic_sub_return - subtract integer from atomic variable | ||
72 | * @i: integer value to subtract | ||
73 | * @v: pointer of type atomic_t | ||
74 | * | ||
75 | * Atomically subtracts @i from @v and returns the result | ||
76 | * Note that the guaranteed useful range of an atomic_t is only 24 bits. | ||
77 | */ | ||
78 | static inline int atomic_sub_return(int i, atomic_t *v) | ||
79 | { | ||
80 | unsigned long flags; | ||
81 | int temp; | ||
82 | |||
83 | local_irq_save(flags); | ||
84 | temp = v->counter; | ||
85 | temp -= i; | ||
86 | v->counter = temp; | ||
87 | local_irq_restore(flags); | ||
88 | |||
89 | return temp; | ||
90 | } | ||
91 | |||
92 | static inline int atomic_add_negative(int i, atomic_t *v) | ||
93 | { | ||
94 | return atomic_add_return(i, v) < 0; | ||
95 | } | ||
96 | |||
97 | static inline void atomic_add(int i, atomic_t *v) | ||
98 | { | ||
99 | atomic_add_return(i, v); | ||
100 | } | ||
101 | |||
102 | static inline void atomic_sub(int i, atomic_t *v) | ||
103 | { | ||
104 | atomic_sub_return(i, v); | ||
105 | } | ||
106 | |||
107 | static inline void atomic_inc(atomic_t *v) | ||
108 | { | ||
109 | atomic_add_return(1, v); | ||
110 | } | ||
111 | |||
112 | static inline void atomic_dec(atomic_t *v) | ||
113 | { | ||
114 | atomic_sub_return(1, v); | ||
115 | } | ||
116 | |||
117 | #define atomic_dec_return(v) atomic_sub_return(1, (v)) | ||
118 | #define atomic_inc_return(v) atomic_add_return(1, (v)) | ||
119 | |||
120 | #define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0) | ||
121 | #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) | ||
122 | #define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0) | ||
123 | |||
124 | #define atomic_add_unless(v, a, u) \ | ||
125 | ({ \ | ||
126 | int c, old; \ | ||
127 | c = atomic_read(v); \ | ||
128 | while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \ | ||
129 | c = old; \ | ||
130 | c != (u); \ | ||
131 | }) | ||
132 | |||
133 | #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) | ||
134 | |||
135 | static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) | ||
136 | { | ||
137 | unsigned long flags; | ||
138 | |||
139 | mask = ~mask; | ||
140 | local_irq_save(flags); | ||
141 | *addr &= mask; | ||
142 | local_irq_restore(flags); | ||
143 | } | ||
144 | |||
145 | #define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v))) | ||
146 | #define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) | ||
147 | |||
148 | /* Atomic operations are already serializing on MN10300??? */ | ||
149 | #define smp_mb__before_atomic_dec() barrier() | ||
150 | #define smp_mb__after_atomic_dec() barrier() | ||
151 | #define smp_mb__before_atomic_inc() barrier() | ||
152 | #define smp_mb__after_atomic_inc() barrier() | ||
153 | |||
154 | #include <asm-generic/atomic.h> | ||
155 | |||
156 | #endif /* __KERNEL__ */ | ||
157 | #endif /* _ASM_ATOMIC_H */ | ||