blob: 0249ac319476f4dbf20b41b51f9f9362e756a9d0 [file] [log] [blame]
Bryan Wu1394f032007-05-06 14:50:22 -07001#ifndef __BFIN_SPINLOCK_H
2#define __BFIN_SPINLOCK_H
3
Graf Yang6b3087c2009-01-07 23:14:39 +08004#include <asm/atomic.h>
Bryan Wu1394f032007-05-06 14:50:22 -07005
Graf Yang6b3087c2009-01-07 23:14:39 +08006asmlinkage int __raw_spin_is_locked_asm(volatile int *ptr);
7asmlinkage void __raw_spin_lock_asm(volatile int *ptr);
8asmlinkage int __raw_spin_trylock_asm(volatile int *ptr);
9asmlinkage void __raw_spin_unlock_asm(volatile int *ptr);
10asmlinkage void __raw_read_lock_asm(volatile int *ptr);
11asmlinkage int __raw_read_trylock_asm(volatile int *ptr);
12asmlinkage void __raw_read_unlock_asm(volatile int *ptr);
13asmlinkage void __raw_write_lock_asm(volatile int *ptr);
14asmlinkage int __raw_write_trylock_asm(volatile int *ptr);
15asmlinkage void __raw_write_unlock_asm(volatile int *ptr);
16
17static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
18{
19 return __raw_spin_is_locked_asm(&lock->lock);
20}
21
22static inline void __raw_spin_lock(raw_spinlock_t *lock)
23{
24 __raw_spin_lock_asm(&lock->lock);
25}
26
27#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
28
29static inline int __raw_spin_trylock(raw_spinlock_t *lock)
30{
31 return __raw_spin_trylock_asm(&lock->lock);
32}
33
34static inline void __raw_spin_unlock(raw_spinlock_t *lock)
35{
36 __raw_spin_unlock_asm(&lock->lock);
37}
38
39static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
40{
41 while (__raw_spin_is_locked(lock))
42 cpu_relax();
43}
44
45static inline int __raw_read_can_lock(raw_rwlock_t *rw)
46{
47 return __raw_uncached_fetch_asm(&rw->lock) > 0;
48}
49
50static inline int __raw_write_can_lock(raw_rwlock_t *rw)
51{
52 return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS;
53}
54
55static inline void __raw_read_lock(raw_rwlock_t *rw)
56{
57 __raw_read_lock_asm(&rw->lock);
58}
59
60static inline int __raw_read_trylock(raw_rwlock_t *rw)
61{
62 return __raw_read_trylock_asm(&rw->lock);
63}
64
65static inline void __raw_read_unlock(raw_rwlock_t *rw)
66{
67 __raw_read_unlock_asm(&rw->lock);
68}
69
70static inline void __raw_write_lock(raw_rwlock_t *rw)
71{
72 __raw_write_lock_asm(&rw->lock);
73}
74
75static inline int __raw_write_trylock(raw_rwlock_t *rw)
76{
77 return __raw_write_trylock_asm(&rw->lock);
78}
79
80static inline void __raw_write_unlock(raw_rwlock_t *rw)
81{
82 __raw_write_unlock_asm(&rw->lock);
83}
84
85#define _raw_spin_relax(lock) cpu_relax()
86#define _raw_read_relax(lock) cpu_relax()
87#define _raw_write_relax(lock) cpu_relax()
88
89#endif /* !__BFIN_SPINLOCK_H */