diff options
Diffstat (limited to 'include/asm-arm26/atomic.h')
-rw-r--r-- | include/asm-arm26/atomic.h | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/include/asm-arm26/atomic.h b/include/asm-arm26/atomic.h deleted file mode 100644 index d6dd42374cf3..000000000000 --- a/include/asm-arm26/atomic.h +++ /dev/null | |||
@@ -1,123 +0,0 @@ | |||
1 | /* | ||
2 | * linux/include/asm-arm26/atomic.h | ||
3 | * | ||
4 | * Copyright (c) 1996 Russell King. | ||
5 | * Modified for arm26 by Ian Molton | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License version 2 as | ||
9 | * published by the Free Software Foundation. | ||
10 | * | ||
11 | * Changelog: | ||
12 | * 25-11-2004 IM Updated for 2.6.9 | ||
13 | * 27-06-1996 RMK Created | ||
14 | * 13-04-1997 RMK Made functions atomic! | ||
15 | * 07-12-1997 RMK Upgraded for v2.1. | ||
16 | * 26-08-1998 PJB Added #ifdef __KERNEL__ | ||
17 | * | ||
18 | * FIXME - its probably worth seeing what these compile into... | ||
19 | */ | ||
20 | #ifndef __ASM_ARM_ATOMIC_H | ||
21 | #define __ASM_ARM_ATOMIC_H | ||
22 | |||
23 | #ifdef CONFIG_SMP | ||
24 | #error SMP is NOT supported | ||
25 | #endif | ||
26 | |||
27 | typedef struct { volatile int counter; } atomic_t; | ||
28 | |||
29 | #define ATOMIC_INIT(i) { (i) } | ||
30 | |||
31 | #ifdef __KERNEL__ | ||
32 | #include <asm/system.h> | ||
33 | |||
34 | #define atomic_read(v) ((v)->counter) | ||
35 | #define atomic_set(v,i) (((v)->counter) = (i)) | ||
36 | |||
37 | static inline int atomic_add_return(int i, atomic_t *v) | ||
38 | { | ||
39 | unsigned long flags; | ||
40 | int val; | ||
41 | |||
42 | local_irq_save(flags); | ||
43 | val = v->counter; | ||
44 | v->counter = val += i; | ||
45 | local_irq_restore(flags); | ||
46 | |||
47 | return val; | ||
48 | } | ||
49 | |||
50 | static inline int atomic_sub_return(int i, atomic_t *v) | ||
51 | { | ||
52 | unsigned long flags; | ||
53 | int val; | ||
54 | |||
55 | local_irq_save(flags); | ||
56 | val = v->counter; | ||
57 | v->counter = val -= i; | ||
58 | local_irq_restore(flags); | ||
59 | |||
60 | return val; | ||
61 | } | ||
62 | |||
63 | static inline int atomic_cmpxchg(atomic_t *v, int old, int new) | ||
64 | { | ||
65 | int ret; | ||
66 | unsigned long flags; | ||
67 | |||
68 | local_irq_save(flags); | ||
69 | ret = v->counter; | ||
70 | if (likely(ret == old)) | ||
71 | v->counter = new; | ||
72 | local_irq_restore(flags); | ||
73 | |||
74 | return ret; | ||
75 | } | ||
76 | |||
77 | #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) | ||
78 | |||
79 | static inline int atomic_add_unless(atomic_t *v, int a, int u) | ||
80 | { | ||
81 | int ret; | ||
82 | unsigned long flags; | ||
83 | |||
84 | local_irq_save(flags); | ||
85 | ret = v->counter; | ||
86 | if (ret != u) | ||
87 | v->counter += a; | ||
88 | local_irq_restore(flags); | ||
89 | |||
90 | return ret != u; | ||
91 | } | ||
92 | #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) | ||
93 | |||
94 | static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) | ||
95 | { | ||
96 | unsigned long flags; | ||
97 | |||
98 | local_irq_save(flags); | ||
99 | *addr &= ~mask; | ||
100 | local_irq_restore(flags); | ||
101 | } | ||
102 | |||
103 | #define atomic_add(i, v) (void) atomic_add_return(i, v) | ||
104 | #define atomic_inc(v) (void) atomic_add_return(1, v) | ||
105 | #define atomic_sub(i, v) (void) atomic_sub_return(i, v) | ||
106 | #define atomic_dec(v) (void) atomic_sub_return(1, v) | ||
107 | |||
108 | #define atomic_inc_and_test(v) (atomic_add_return(1, v) == 0) | ||
109 | #define atomic_dec_and_test(v) (atomic_sub_return(1, v) == 0) | ||
110 | #define atomic_inc_return(v) (atomic_add_return(1, v)) | ||
111 | #define atomic_dec_return(v) (atomic_sub_return(1, v)) | ||
112 | |||
113 | #define atomic_add_negative(i,v) (atomic_add_return(i, v) < 0) | ||
114 | |||
115 | /* Atomic operations are already serializing on ARM26 */ | ||
116 | #define smp_mb__before_atomic_dec() barrier() | ||
117 | #define smp_mb__after_atomic_dec() barrier() | ||
118 | #define smp_mb__before_atomic_inc() barrier() | ||
119 | #define smp_mb__after_atomic_inc() barrier() | ||
120 | |||
121 | #include <asm-generic/atomic.h> | ||
122 | #endif | ||
123 | #endif | ||