Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 1 | #ifndef __BFIN_SPINLOCK_H |
| 2 | #define __BFIN_SPINLOCK_H |
| 3 | |
Mike Frysinger | 3d15063 | 2009-06-13 11:21:51 -0400 | [diff] [blame] | 4 | #ifndef CONFIG_SMP |
| 5 | # include <asm-generic/spinlock.h> |
| 6 | #else |
| 7 | |
Graf Yang | 6b3087c | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 8 | #include <asm/atomic.h> |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 9 | |
Graf Yang | 6b3087c | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 10 | asmlinkage int __raw_spin_is_locked_asm(volatile int *ptr); |
| 11 | asmlinkage void __raw_spin_lock_asm(volatile int *ptr); |
| 12 | asmlinkage int __raw_spin_trylock_asm(volatile int *ptr); |
| 13 | asmlinkage void __raw_spin_unlock_asm(volatile int *ptr); |
| 14 | asmlinkage void __raw_read_lock_asm(volatile int *ptr); |
| 15 | asmlinkage int __raw_read_trylock_asm(volatile int *ptr); |
| 16 | asmlinkage void __raw_read_unlock_asm(volatile int *ptr); |
| 17 | asmlinkage void __raw_write_lock_asm(volatile int *ptr); |
| 18 | asmlinkage int __raw_write_trylock_asm(volatile int *ptr); |
| 19 | asmlinkage void __raw_write_unlock_asm(volatile int *ptr); |
| 20 | |
| 21 | static inline int __raw_spin_is_locked(raw_spinlock_t *lock) |
| 22 | { |
| 23 | return __raw_spin_is_locked_asm(&lock->lock); |
| 24 | } |
| 25 | |
| 26 | static inline void __raw_spin_lock(raw_spinlock_t *lock) |
| 27 | { |
| 28 | __raw_spin_lock_asm(&lock->lock); |
| 29 | } |
| 30 | |
| 31 | #define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock) |
| 32 | |
| 33 | static inline int __raw_spin_trylock(raw_spinlock_t *lock) |
| 34 | { |
| 35 | return __raw_spin_trylock_asm(&lock->lock); |
| 36 | } |
| 37 | |
| 38 | static inline void __raw_spin_unlock(raw_spinlock_t *lock) |
| 39 | { |
| 40 | __raw_spin_unlock_asm(&lock->lock); |
| 41 | } |
| 42 | |
| 43 | static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock) |
| 44 | { |
| 45 | while (__raw_spin_is_locked(lock)) |
| 46 | cpu_relax(); |
| 47 | } |
| 48 | |
| 49 | static inline int __raw_read_can_lock(raw_rwlock_t *rw) |
| 50 | { |
| 51 | return __raw_uncached_fetch_asm(&rw->lock) > 0; |
| 52 | } |
| 53 | |
| 54 | static inline int __raw_write_can_lock(raw_rwlock_t *rw) |
| 55 | { |
| 56 | return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS; |
| 57 | } |
| 58 | |
| 59 | static inline void __raw_read_lock(raw_rwlock_t *rw) |
| 60 | { |
| 61 | __raw_read_lock_asm(&rw->lock); |
| 62 | } |
| 63 | |
| 64 | static inline int __raw_read_trylock(raw_rwlock_t *rw) |
| 65 | { |
| 66 | return __raw_read_trylock_asm(&rw->lock); |
| 67 | } |
| 68 | |
| 69 | static inline void __raw_read_unlock(raw_rwlock_t *rw) |
| 70 | { |
| 71 | __raw_read_unlock_asm(&rw->lock); |
| 72 | } |
| 73 | |
| 74 | static inline void __raw_write_lock(raw_rwlock_t *rw) |
| 75 | { |
| 76 | __raw_write_lock_asm(&rw->lock); |
| 77 | } |
| 78 | |
| 79 | static inline int __raw_write_trylock(raw_rwlock_t *rw) |
| 80 | { |
| 81 | return __raw_write_trylock_asm(&rw->lock); |
| 82 | } |
| 83 | |
| 84 | static inline void __raw_write_unlock(raw_rwlock_t *rw) |
| 85 | { |
| 86 | __raw_write_unlock_asm(&rw->lock); |
| 87 | } |
| 88 | |
| 89 | #define _raw_spin_relax(lock) cpu_relax() |
| 90 | #define _raw_read_relax(lock) cpu_relax() |
| 91 | #define _raw_write_relax(lock) cpu_relax() |
| 92 | |
Mike Frysinger | 3d15063 | 2009-06-13 11:21:51 -0400 | [diff] [blame] | 93 | #endif |
| 94 | |
Graf Yang | 6b3087c | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 95 | #endif /* !__BFIN_SPINLOCK_H */ |