atomic-irq.h revision 0c50f6f38399685d0c9ef0f5ffd6c4955e31cb26 
1#ifndef __ASM_SH_ATOMIC_IRQ_H
2#define __ASM_SH_ATOMIC_IRQ_H
3
4/*
5 * To get proper branch prediction for the main line, we must branch
6 * forward to code at the end of this object's .text section, then
7 * branch back to restart the operation.
8 */
9static inline void atomic_add(int i, atomic_t *v)
10{
11	unsigned long flags;
12
13	raw_local_irq_save(flags);
14	v->counter += i;
15	raw_local_irq_restore(flags);
16}
17
18static inline void atomic_sub(int i, atomic_t *v)
19{
20	unsigned long flags;
21
22	raw_local_irq_save(flags);
23	v->counter -= i;
24	raw_local_irq_restore(flags);
25}
26
27static inline int atomic_add_return(int i, atomic_t *v)
28{
29	unsigned long temp, flags;
30
31	raw_local_irq_save(flags);
32	temp = v->counter;
33	temp += i;
34	v->counter = temp;
35	raw_local_irq_restore(flags);
36
37	return temp;
38}
39
40static inline int atomic_sub_return(int i, atomic_t *v)
41{
42	unsigned long temp, flags;
43
44	raw_local_irq_save(flags);
45	temp = v->counter;
46	temp -= i;
47	v->counter = temp;
48	raw_local_irq_restore(flags);
49
50	return temp;
51}
52
53static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
54{
55	unsigned long flags;
56
57	raw_local_irq_save(flags);
58	v->counter &= ~mask;
59	raw_local_irq_restore(flags);
60}
61
62static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
63{
64	unsigned long flags;
65
66	raw_local_irq_save(flags);
67	v->counter |= mask;
68	raw_local_irq_restore(flags);
69}
70
71#endif /* __ASM_SH_ATOMIC_IRQ_H */
72