diff options
Diffstat (limited to 'include/asm-blackfin/atomic.h')
-rw-r--r-- | include/asm-blackfin/atomic.h | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/include/asm-blackfin/atomic.h b/include/asm-blackfin/atomic.h deleted file mode 100644 index 7cf508718605..000000000000 --- a/include/asm-blackfin/atomic.h +++ /dev/null | |||
@@ -1,144 +0,0 @@ | |||
1 | #ifndef __ARCH_BLACKFIN_ATOMIC__ | ||
2 | #define __ARCH_BLACKFIN_ATOMIC__ | ||
3 | |||
4 | #include <asm/system.h> /* local_irq_XXX() */ | ||
5 | |||
6 | /* | ||
7 | * Atomic operations that C can't guarantee us. Useful for | ||
8 | * resource counting etc.. | ||
9 | * | ||
10 | * Generally we do not concern about SMP BFIN systems, so we don't have | ||
11 | * to deal with that. | ||
12 | * | ||
13 | * Tony Kou (tonyko@lineo.ca) Lineo Inc. 2001 | ||
14 | */ | ||
15 | |||
16 | typedef struct { | ||
17 | int counter; | ||
18 | } atomic_t; | ||
19 | #define ATOMIC_INIT(i) { (i) } | ||
20 | |||
21 | #define atomic_read(v) ((v)->counter) | ||
22 | #define atomic_set(v, i) (((v)->counter) = i) | ||
23 | |||
24 | static __inline__ void atomic_add(int i, atomic_t * v) | ||
25 | { | ||
26 | long flags; | ||
27 | |||
28 | local_irq_save(flags); | ||
29 | v->counter += i; | ||
30 | local_irq_restore(flags); | ||
31 | } | ||
32 | |||
33 | static __inline__ void atomic_sub(int i, atomic_t * v) | ||
34 | { | ||
35 | long flags; | ||
36 | |||
37 | local_irq_save(flags); | ||
38 | v->counter -= i; | ||
39 | local_irq_restore(flags); | ||
40 | |||
41 | } | ||
42 | |||
43 | static inline int atomic_add_return(int i, atomic_t * v) | ||
44 | { | ||
45 | int __temp = 0; | ||
46 | long flags; | ||
47 | |||
48 | local_irq_save(flags); | ||
49 | v->counter += i; | ||
50 | __temp = v->counter; | ||
51 | local_irq_restore(flags); | ||
52 | |||
53 | |||
54 | return __temp; | ||
55 | } | ||
56 | |||
57 | #define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) | ||
58 | static inline int atomic_sub_return(int i, atomic_t * v) | ||
59 | { | ||
60 | int __temp = 0; | ||
61 | long flags; | ||
62 | |||
63 | local_irq_save(flags); | ||
64 | v->counter -= i; | ||
65 | __temp = v->counter; | ||
66 | local_irq_restore(flags); | ||
67 | |||
68 | return __temp; | ||
69 | } | ||
70 | |||
71 | static __inline__ void atomic_inc(volatile atomic_t * v) | ||
72 | { | ||
73 | long flags; | ||
74 | |||
75 | local_irq_save(flags); | ||
76 | v->counter++; | ||
77 | local_irq_restore(flags); | ||
78 | } | ||
79 | |||
80 | #define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) | ||
81 | #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) | ||
82 | |||
83 | #define atomic_add_unless(v, a, u) \ | ||
84 | ({ \ | ||
85 | int c, old; \ | ||
86 | c = atomic_read(v); \ | ||
87 | while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \ | ||
88 | c = old; \ | ||
89 | c != (u); \ | ||
90 | }) | ||
91 | #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) | ||
92 | |||
93 | static __inline__ void atomic_dec(volatile atomic_t * v) | ||
94 | { | ||
95 | long flags; | ||
96 | |||
97 | local_irq_save(flags); | ||
98 | v->counter--; | ||
99 | local_irq_restore(flags); | ||
100 | } | ||
101 | |||
102 | static __inline__ void atomic_clear_mask(unsigned int mask, atomic_t * v) | ||
103 | { | ||
104 | long flags; | ||
105 | |||
106 | local_irq_save(flags); | ||
107 | v->counter &= ~mask; | ||
108 | local_irq_restore(flags); | ||
109 | } | ||
110 | |||
111 | static __inline__ void atomic_set_mask(unsigned int mask, atomic_t * v) | ||
112 | { | ||
113 | long flags; | ||
114 | |||
115 | local_irq_save(flags); | ||
116 | v->counter |= mask; | ||
117 | local_irq_restore(flags); | ||
118 | } | ||
119 | |||
120 | /* Atomic operations are already serializing */ | ||
121 | #define smp_mb__before_atomic_dec() barrier() | ||
122 | #define smp_mb__after_atomic_dec() barrier() | ||
123 | #define smp_mb__before_atomic_inc() barrier() | ||
124 | #define smp_mb__after_atomic_inc() barrier() | ||
125 | |||
126 | #define atomic_dec_return(v) atomic_sub_return(1,(v)) | ||
127 | #define atomic_inc_return(v) atomic_add_return(1,(v)) | ||
128 | |||
129 | /* | ||
130 | * atomic_inc_and_test - increment and test | ||
131 | * @v: pointer of type atomic_t | ||
132 | * | ||
133 | * Atomically increments @v by 1 | ||
134 | * and returns true if the result is zero, or false for all | ||
135 | * other cases. | ||
136 | */ | ||
137 | #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) | ||
138 | |||
139 | #define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0) | ||
140 | #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) | ||
141 | |||
142 | #include <asm-generic/atomic.h> | ||
143 | |||
144 | #endif /* __ARCH_BLACKFIN_ATOMIC __ */ | ||