1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
#ifndef __ARCH_BLACKFIN_ATOMIC__
#define __ARCH_BLACKFIN_ATOMIC__
#include <linux/types.h>
#include <asm/system.h> /* local_irq_XXX() */
/*
* Atomic operations that C can't guarantee us. Useful for
* resource counting etc..
*
* Generally we do not concern about SMP BFIN systems, so we don't have
* to deal with that.
*
* Tony Kou (tonyko@lineo.ca) Lineo Inc. 2001
*/
#define ATOMIC_INIT(i) { (i) }
#define atomic_set(v, i) (((v)->counter) = i)
#ifdef CONFIG_SMP
#define atomic_read(v) __raw_uncached_fetch_asm(&(v)->counter)
asmlinkage int __raw_uncached_fetch_asm(const volatile int *ptr);
asmlinkage int __raw_atomic_update_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_clear_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_set_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_xor_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_test_asm(const volatile int *ptr, int value);
static inline void atomic_add(int i, atomic_t *v)
{
__raw_atomic_update_asm(&v->counter, i);
}
static inline void atomic_sub(int i, atomic_t *v)
{
__raw_atomic_update_asm(&v->counter, -i);
}
static inline int atomic_add_return(int i, atomic_t *v)
{
return __raw_atomic_update_asm(&v->counter, i);
}
static inline int atomic_sub_return(int i, atomic_t *v)
{
return __raw_atomic_update_asm(&v->counter, -i);
}
static inline void atomic_inc(volatile atomic_t *v)
{
__raw_atomic_update_asm(&v->counter, 1);
}
static inline void atomic_dec(volatile atomic_t *v)
{
__raw_atomic_update_asm(&v->counter, -1);
}
static inline void atomic_clear_mask(int mask, atomic_t *v)
{
__raw_atomic_clear_asm(&v->counter, mask);
}
static inline void atomic_set_mask(int mask, atomic_t *v)
{
__raw_atomic_set_asm(&v->counter, mask);
}
static inline int atomic_test_mask(int mask, atomic_t *v)
{
return __raw_atomic_test_asm(&v->counter, mask);
}
/* Atomic operations are already serializing */
#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
#else /* !CONFIG_SMP */
#define atomic_read(v) ((v)->counter)
static inline void atomic_add(int i, atomic_t *v)
{
long flags;
local_irq_save_hw(flags);
v->counter += i;
local_irq_restore_hw(flags);
}
static inline void atomic_sub(int i, atomic_t *v)
{
long flags;
local_irq_save_hw(flags);
v->counter -= i;
local_irq_restore_hw(flags);
}
static inline int atomic_add_return(int i, atomic_t *v)
{
int __temp = 0;
long flags;
local_irq_save_hw(flags);
v->counter += i;
__temp = v->counter;
local_irq_restore_hw(flags);
return __temp;
}
static inline int atomic_sub_return(int i, atomic_t *v)
{
int __temp = 0;
long flags;
local_irq_save_hw(flags);
v->counter -= i;
__temp = v->counter;
local_irq_restore_hw(flags);
return __temp;
}
static inline void atomic_inc(volatile atomic_t *v)
{
long flags;
local_irq_save_hw(flags);
v->counter++;
local_irq_restore_hw(flags);
}
static inline void atomic_dec(volatile atomic_t *v)
{
long flags;
local_irq_save_hw(flags);
v->counter--;
local_irq_restore_hw(flags);
}
static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
long flags;
local_irq_save_hw(flags);
v->counter &= ~mask;
local_irq_restore_hw(flags);
}
static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
{
long flags;
local_irq_save_hw(flags);
v->counter |= mask;
local_irq_restore_hw(flags);
}
/* Atomic operations are already serializing */
#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
#endif /* !CONFIG_SMP */
#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
#define atomic_dec_return(v) atomic_sub_return(1,(v))
#define atomic_inc_return(v) atomic_add_return(1,(v))
#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
#define atomic_add_unless(v, a, u) \
({ \
int c, old; \
c = atomic_read(v); \
while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
c = old; \
c != (u); \
})
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
/*
* atomic_inc_and_test - increment and test
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1
* and returns true if the result is zero, or false for all
* other cases.
*/
#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
#define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0)
#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
#include <asm-generic/atomic.h>
#endif /* __ARCH_BLACKFIN_ATOMIC __ */
|
