Commit | Line | Data |
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96f1050d RG |
1 | /* |
2 | * Copyright 2004-2009 Analog Devices Inc. | |
3 | * | |
4 | * Licensed under the GPL-2 or later. | |
5 | */ | |
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 | ||
6b3087c6 | 14 | #include <asm/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); | |
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); | |
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 | ||
55 | static inline int __raw_read_can_lock(raw_rwlock_t *rw) | |
56 | { | |
57 | return __raw_uncached_fetch_asm(&rw->lock) > 0; | |
58 | } | |
59 | ||
60 | static inline int __raw_write_can_lock(raw_rwlock_t *rw) | |
61 | { | |
62 | return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS; | |
63 | } | |
64 | ||
65 | static inline void __raw_read_lock(raw_rwlock_t *rw) | |
66 | { | |
67 | __raw_read_lock_asm(&rw->lock); | |
68 | } | |
69 | ||
70 | static inline int __raw_read_trylock(raw_rwlock_t *rw) | |
71 | { | |
72 | return __raw_read_trylock_asm(&rw->lock); | |
73 | } | |
74 | ||
75 | static inline void __raw_read_unlock(raw_rwlock_t *rw) | |
76 | { | |
77 | __raw_read_unlock_asm(&rw->lock); | |
78 | } | |
79 | ||
80 | static inline void __raw_write_lock(raw_rwlock_t *rw) | |
81 | { | |
82 | __raw_write_lock_asm(&rw->lock); | |
83 | } | |
84 | ||
85 | static inline int __raw_write_trylock(raw_rwlock_t *rw) | |
86 | { | |
87 | return __raw_write_trylock_asm(&rw->lock); | |
88 | } | |
89 | ||
90 | static inline void __raw_write_unlock(raw_rwlock_t *rw) | |
91 | { | |
92 | __raw_write_unlock_asm(&rw->lock); | |
93 | } | |
94 | ||
0199c4e6 TG |
95 | #define arch_spin_relax(lock) cpu_relax() |
96 | #define arch_read_relax(lock) cpu_relax() | |
97 | #define arch_write_relax(lock) cpu_relax() | |
6b3087c6 | 98 | |
3d150630 MF |
99 | #endif |
100 | ||
6b3087c6 | 101 | #endif /* !__BFIN_SPINLOCK_H */ |