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> |
726328d9 PZ |
15 | #include <asm/processor.h> |
16 | #include <asm/barrier.h> | |
1394f032 | 17 | |
6b3087c6 GY |
18 | asmlinkage int __raw_spin_is_locked_asm(volatile int *ptr); |
19 | asmlinkage void __raw_spin_lock_asm(volatile int *ptr); | |
20 | asmlinkage int __raw_spin_trylock_asm(volatile int *ptr); | |
21 | asmlinkage void __raw_spin_unlock_asm(volatile int *ptr); | |
71a66287 GY |
22 | asmlinkage void __raw_read_lock_asm(volatile int *ptr); |
23 | asmlinkage int __raw_read_trylock_asm(volatile int *ptr); | |
24 | asmlinkage void __raw_read_unlock_asm(volatile int *ptr); | |
25 | asmlinkage void __raw_write_lock_asm(volatile int *ptr); | |
26 | asmlinkage int __raw_write_trylock_asm(volatile int *ptr); | |
27 | asmlinkage void __raw_write_unlock_asm(volatile int *ptr); | |
6b3087c6 | 28 | |
0199c4e6 | 29 | static inline int arch_spin_is_locked(arch_spinlock_t *lock) |
6b3087c6 GY |
30 | { |
31 | return __raw_spin_is_locked_asm(&lock->lock); | |
32 | } | |
33 | ||
0199c4e6 | 34 | static inline void arch_spin_lock(arch_spinlock_t *lock) |
6b3087c6 GY |
35 | { |
36 | __raw_spin_lock_asm(&lock->lock); | |
37 | } | |
38 | ||
0199c4e6 | 39 | #define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock) |
6b3087c6 | 40 | |
0199c4e6 | 41 | static inline int arch_spin_trylock(arch_spinlock_t *lock) |
6b3087c6 GY |
42 | { |
43 | return __raw_spin_trylock_asm(&lock->lock); | |
44 | } | |
45 | ||
0199c4e6 | 46 | static inline void arch_spin_unlock(arch_spinlock_t *lock) |
6b3087c6 GY |
47 | { |
48 | __raw_spin_unlock_asm(&lock->lock); | |
49 | } | |
50 | ||
0199c4e6 | 51 | static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) |
6b3087c6 | 52 | { |
726328d9 | 53 | smp_cond_load_acquire(&lock->lock, !VAL); |
6b3087c6 GY |
54 | } |
55 | ||
e5931943 | 56 | static inline int arch_read_can_lock(arch_rwlock_t *rw) |
6b3087c6 GY |
57 | { |
58 | return __raw_uncached_fetch_asm(&rw->lock) > 0; | |
59 | } | |
60 | ||
e5931943 | 61 | static inline int arch_write_can_lock(arch_rwlock_t *rw) |
6b3087c6 GY |
62 | { |
63 | return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS; | |
64 | } | |
65 | ||
e5931943 | 66 | static inline void arch_read_lock(arch_rwlock_t *rw) |
6b3087c6 | 67 | { |
71a66287 | 68 | __raw_read_lock_asm(&rw->lock); |
6b3087c6 GY |
69 | } |
70 | ||
54d756ed GY |
71 | #define arch_read_lock_flags(lock, flags) arch_read_lock(lock) |
72 | ||
e5931943 | 73 | static inline int arch_read_trylock(arch_rwlock_t *rw) |
6b3087c6 | 74 | { |
71a66287 | 75 | return __raw_read_trylock_asm(&rw->lock); |
6b3087c6 GY |
76 | } |
77 | ||
e5931943 | 78 | static inline void arch_read_unlock(arch_rwlock_t *rw) |
6b3087c6 | 79 | { |
71a66287 | 80 | __raw_read_unlock_asm(&rw->lock); |
6b3087c6 GY |
81 | } |
82 | ||
e5931943 | 83 | static inline void arch_write_lock(arch_rwlock_t *rw) |
6b3087c6 | 84 | { |
71a66287 | 85 | __raw_write_lock_asm(&rw->lock); |
6b3087c6 GY |
86 | } |
87 | ||
54d756ed GY |
88 | #define arch_write_lock_flags(lock, flags) arch_write_lock(lock) |
89 | ||
e5931943 | 90 | static inline int arch_write_trylock(arch_rwlock_t *rw) |
6b3087c6 | 91 | { |
71a66287 | 92 | return __raw_write_trylock_asm(&rw->lock); |
6b3087c6 GY |
93 | } |
94 | ||
e5931943 | 95 | static inline void arch_write_unlock(arch_rwlock_t *rw) |
6b3087c6 | 96 | { |
71a66287 | 97 | __raw_write_unlock_asm(&rw->lock); |
6b3087c6 GY |
98 | } |
99 | ||
0199c4e6 TG |
100 | #define arch_spin_relax(lock) cpu_relax() |
101 | #define arch_read_relax(lock) cpu_relax() | |
102 | #define arch_write_relax(lock) cpu_relax() | |
6b3087c6 | 103 | |
3d150630 MF |
104 | #endif |
105 | ||
6b3087c6 | 106 | #endif /* !__BFIN_SPINLOCK_H */ |