]>
Commit | Line | Data |
---|---|---|
96f1050d | 1 | /* |
96956450 MF |
2 | * Copyright 2004-2009 Analog Devices Inc. |
3 | * | |
4 | * Licensed under the GPL-2 or later. | |
5 | */ | |
96f1050d | 6 | |
1394f032 BW |
7 | #ifndef __BFIN_SPINLOCK_H |
8 | #define __BFIN_SPINLOCK_H | |
9 | ||
3d150630 MF |
10 | #ifndef CONFIG_SMP |
11 | # include <asm-generic/spinlock.h> | |
12 | #else | |
13 | ||
60063497 | 14 | #include <linux/atomic.h> |
1394f032 | 15 | |
6b3087c6 GY |
16 | asmlinkage int __raw_spin_is_locked_asm(volatile int *ptr); |
17 | asmlinkage void __raw_spin_lock_asm(volatile int *ptr); | |
18 | asmlinkage int __raw_spin_trylock_asm(volatile int *ptr); | |
19 | asmlinkage void __raw_spin_unlock_asm(volatile int *ptr); | |
71a66287 GY |
20 | asmlinkage void __raw_read_lock_asm(volatile int *ptr); |
21 | asmlinkage int __raw_read_trylock_asm(volatile int *ptr); | |
22 | asmlinkage void __raw_read_unlock_asm(volatile int *ptr); | |
23 | asmlinkage void __raw_write_lock_asm(volatile int *ptr); | |
24 | asmlinkage int __raw_write_trylock_asm(volatile int *ptr); | |
25 | asmlinkage void __raw_write_unlock_asm(volatile int *ptr); | |
6b3087c6 | 26 | |
0199c4e6 | 27 | static inline int arch_spin_is_locked(arch_spinlock_t *lock) |
6b3087c6 GY |
28 | { |
29 | return __raw_spin_is_locked_asm(&lock->lock); | |
30 | } | |
31 | ||
0199c4e6 | 32 | static inline void arch_spin_lock(arch_spinlock_t *lock) |
6b3087c6 GY |
33 | { |
34 | __raw_spin_lock_asm(&lock->lock); | |
35 | } | |
36 | ||
0199c4e6 | 37 | #define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock) |
6b3087c6 | 38 | |
0199c4e6 | 39 | static inline int arch_spin_trylock(arch_spinlock_t *lock) |
6b3087c6 GY |
40 | { |
41 | return __raw_spin_trylock_asm(&lock->lock); | |
42 | } | |
43 | ||
0199c4e6 | 44 | static inline void arch_spin_unlock(arch_spinlock_t *lock) |
6b3087c6 GY |
45 | { |
46 | __raw_spin_unlock_asm(&lock->lock); | |
47 | } | |
48 | ||
0199c4e6 | 49 | static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) |
6b3087c6 | 50 | { |
0199c4e6 | 51 | while (arch_spin_is_locked(lock)) |
6b3087c6 GY |
52 | cpu_relax(); |
53 | } | |
54 | ||
e5931943 | 55 | static inline int arch_read_can_lock(arch_rwlock_t *rw) |
6b3087c6 GY |
56 | { |
57 | return __raw_uncached_fetch_asm(&rw->lock) > 0; | |
58 | } | |
59 | ||
e5931943 | 60 | static inline int arch_write_can_lock(arch_rwlock_t *rw) |
6b3087c6 GY |
61 | { |
62 | return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS; | |
63 | } | |
64 | ||
e5931943 | 65 | static inline void arch_read_lock(arch_rwlock_t *rw) |
6b3087c6 | 66 | { |
71a66287 | 67 | __raw_read_lock_asm(&rw->lock); |
6b3087c6 GY |
68 | } |
69 | ||
54d756ed GY |
70 | #define arch_read_lock_flags(lock, flags) arch_read_lock(lock) |
71 | ||
e5931943 | 72 | static inline int arch_read_trylock(arch_rwlock_t *rw) |
6b3087c6 | 73 | { |
71a66287 | 74 | return __raw_read_trylock_asm(&rw->lock); |
6b3087c6 GY |
75 | } |
76 | ||
e5931943 | 77 | static inline void arch_read_unlock(arch_rwlock_t *rw) |
6b3087c6 | 78 | { |
71a66287 | 79 | __raw_read_unlock_asm(&rw->lock); |
6b3087c6 GY |
80 | } |
81 | ||
e5931943 | 82 | static inline void arch_write_lock(arch_rwlock_t *rw) |
6b3087c6 | 83 | { |
71a66287 | 84 | __raw_write_lock_asm(&rw->lock); |
6b3087c6 GY |
85 | } |
86 | ||
54d756ed GY |
87 | #define arch_write_lock_flags(lock, flags) arch_write_lock(lock) |
88 | ||
e5931943 | 89 | static inline int arch_write_trylock(arch_rwlock_t *rw) |
6b3087c6 | 90 | { |
71a66287 | 91 | return __raw_write_trylock_asm(&rw->lock); |
6b3087c6 GY |
92 | } |
93 | ||
e5931943 | 94 | static inline void arch_write_unlock(arch_rwlock_t *rw) |
6b3087c6 | 95 | { |
71a66287 | 96 | __raw_write_unlock_asm(&rw->lock); |
6b3087c6 GY |
97 | } |
98 | ||
0199c4e6 TG |
99 | #define arch_spin_relax(lock) cpu_relax() |
100 | #define arch_read_relax(lock) cpu_relax() | |
101 | #define arch_write_relax(lock) cpu_relax() | |
6b3087c6 | 102 | |
3d150630 MF |
103 | #endif |
104 | ||
6b3087c6 | 105 | #endif /* !__BFIN_SPINLOCK_H */ |