102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
/*
|
||
* Copyright 2004-2009 Analog Devices Inc.
|
||
*
|
||
* Licensed under the GPL-2 or later.
|
||
*/
|
||
|
||
#ifndef __BFIN_SPINLOCK_H
|
||
#define __BFIN_SPINLOCK_H
|
||
|
||
#ifndef CONFIG_SMP
|
||
# include <asm-generic/spinlock.h>
|
||
#else
|
||
|
||
#include <asm/atomic.h>
|
||
|
||
asmlinkage int __raw_spin_is_locked_asm(volatile int *ptr);
|
||
asmlinkage void __raw_spin_lock_asm(volatile int *ptr);
|
||
asmlinkage int __raw_spin_trylock_asm(volatile int *ptr);
|
||
asmlinkage void __raw_spin_unlock_asm(volatile int *ptr);
|
||
asmlinkage void __raw_read_lock_asm(volatile int *ptr);
|
||
asmlinkage int __raw_read_trylock_asm(volatile int *ptr);
|
||
asmlinkage void __raw_read_unlock_asm(volatile int *ptr);
|
||
asmlinkage void __raw_write_lock_asm(volatile int *ptr);
|
||
asmlinkage int __raw_write_trylock_asm(volatile int *ptr);
|
||
asmlinkage void __raw_write_unlock_asm(volatile int *ptr);
|
||
|
||
static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
|
||
{
|
||
return __raw_spin_is_locked_asm(&lock->lock);
|
||
}
|
||
|
||
static inline void __raw_spin_lock(raw_spinlock_t *lock)
|
||
{
|
||
__raw_spin_lock_asm(&lock->lock);
|
||
}
|
||
|
||
#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
|
||
|
||
static inline int __raw_spin_trylock(raw_spinlock_t *lock)
|
||
{
|
||
return __raw_spin_trylock_asm(&lock->lock);
|
||
}
|
||
|
||
static inline void __raw_spin_unlock(raw_spinlock_t *lock)
|
||
{
|
||
__raw_spin_unlock_asm(&lock->lock);
|
||
}
|
||
|
||
static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
|
||
{
|
||
while (__raw_spin_is_locked(lock))
|
||
cpu_relax();
|
||
}
|
||
|
||
static inline int __raw_read_can_lock(raw_rwlock_t *rw)
|
||
{
|
||
return __raw_uncached_fetch_asm(&rw->lock) > 0;
|
||
}
|
||
|
||
static inline int __raw_write_can_lock(raw_rwlock_t *rw)
|
||
{
|
||
return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS;
|
||
}
|
||
|
||
static inline void __raw_read_lock(raw_rwlock_t *rw)
|
||
{
|
||
__raw_read_lock_asm(&rw->lock);
|
||
}
|
||
|
||
static inline int __raw_read_trylock(raw_rwlock_t *rw)
|
||
{
|
||
return __raw_read_trylock_asm(&rw->lock);
|
||
}
|
||
|
||
static inline void __raw_read_unlock(raw_rwlock_t *rw)
|
||
{
|
||
__raw_read_unlock_asm(&rw->lock);
|
||
}
|
||
|
||
static inline void __raw_write_lock(raw_rwlock_t *rw)
|
||
{
|
||
__raw_write_lock_asm(&rw->lock);
|
||
}
|
||
|
||
static inline int __raw_write_trylock(raw_rwlock_t *rw)
|
||
{
|
||
return __raw_write_trylock_asm(&rw->lock);
|
||
}
|
||
|
||
static inline void __raw_write_unlock(raw_rwlock_t *rw)
|
||
{
|
||
__raw_write_unlock_asm(&rw->lock);
|
||
}
|
||
|
||
#define _raw_spin_relax(lock) cpu_relax()
|
||
#define _raw_read_relax(lock) cpu_relax()
|
||
#define _raw_write_relax(lock) cpu_relax()
|
||
|
||
#endif
|
||
|
||
#endif /* !__BFIN_SPINLOCK_H */
|