arch/blackfin/include/asm/spinlock.h

   1 /*
   2  * Copyright 2004-2009 Analog Devices Inc.
   3  *
   4  * Licensed under the GPL-2 or later.
   5  */
   6
   7 #ifndef __BFIN_SPINLOCK_H
   8 #define __BFIN_SPINLOCK_H
   9
  10 #ifndef CONFIG_SMP
  11 # include <asm-generic/spinlock.h>
  12 #else
  13
  14 #include <linux/atomic.h>
  15 #include <asm/processor.h>
  16 #include <asm/barrier.h>
  17
  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);
  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);
  28
  29 static inline int arch_spin_is_locked(arch_spinlock_t *lock)
  30 {
  31         return __raw_spin_is_locked_asm(&lock->lock);
  32 }
  33
  34 static inline void arch_spin_lock(arch_spinlock_t *lock)
  35 {
  36         __raw_spin_lock_asm(&lock->lock);
  37 }
  38
  39 static inline int arch_spin_trylock(arch_spinlock_t *lock)
  40 {
  41         return __raw_spin_trylock_asm(&lock->lock);
  42 }
  43
  44 static inline void arch_spin_unlock(arch_spinlock_t *lock)
  45 {
  46         __raw_spin_unlock_asm(&lock->lock);
  47 }
  48
  49 static inline void arch_read_lock(arch_rwlock_t *rw)
  50 {
  51         __raw_read_lock_asm(&rw->lock);
  52 }
  53
  54 static inline int arch_read_trylock(arch_rwlock_t *rw)
  55 {
  56         return __raw_read_trylock_asm(&rw->lock);
  57 }
  58
  59 static inline void arch_read_unlock(arch_rwlock_t *rw)
  60 {
  61         __raw_read_unlock_asm(&rw->lock);
  62 }
  63
  64 static inline void arch_write_lock(arch_rwlock_t *rw)
  65 {
  66         __raw_write_lock_asm(&rw->lock);
  67 }
  68
  69 static inline int arch_write_trylock(arch_rwlock_t *rw)
  70 {
  71         return __raw_write_trylock_asm(&rw->lock);
  72 }
  73
  74 static inline void arch_write_unlock(arch_rwlock_t *rw)
  75 {
  76         __raw_write_unlock_asm(&rw->lock);
  77 }
  78
  79 #endif
  80
  81 #endif /*  !__BFIN_SPINLOCK_H */