6b3087c64a
Blackfin dual core BF561 processor can support SMP like features. https://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:smp-like In this patch, we provide SMP extend to Blackfin header files and machine common code Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
#ifndef __BFIN_SPINLOCK_H
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#define __BFIN_SPINLOCK_H
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#include <asm/atomic.h>
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asmlinkage int __raw_spin_is_locked_asm(volatile int *ptr);
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asmlinkage void __raw_spin_lock_asm(volatile int *ptr);
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asmlinkage int __raw_spin_trylock_asm(volatile int *ptr);
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asmlinkage void __raw_spin_unlock_asm(volatile int *ptr);
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asmlinkage void __raw_read_lock_asm(volatile int *ptr);
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asmlinkage int __raw_read_trylock_asm(volatile int *ptr);
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asmlinkage void __raw_read_unlock_asm(volatile int *ptr);
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asmlinkage void __raw_write_lock_asm(volatile int *ptr);
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asmlinkage int __raw_write_trylock_asm(volatile int *ptr);
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asmlinkage void __raw_write_unlock_asm(volatile int *ptr);
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static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
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{
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return __raw_spin_is_locked_asm(&lock->lock);
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}
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static inline void __raw_spin_lock(raw_spinlock_t *lock)
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{
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__raw_spin_lock_asm(&lock->lock);
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}
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#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
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static inline int __raw_spin_trylock(raw_spinlock_t *lock)
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{
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return __raw_spin_trylock_asm(&lock->lock);
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}
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static inline void __raw_spin_unlock(raw_spinlock_t *lock)
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{
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__raw_spin_unlock_asm(&lock->lock);
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}
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static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
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{
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while (__raw_spin_is_locked(lock))
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cpu_relax();
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}
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static inline int __raw_read_can_lock(raw_rwlock_t *rw)
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{
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return __raw_uncached_fetch_asm(&rw->lock) > 0;
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}
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static inline int __raw_write_can_lock(raw_rwlock_t *rw)
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{
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return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS;
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}
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static inline void __raw_read_lock(raw_rwlock_t *rw)
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{
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__raw_read_lock_asm(&rw->lock);
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}
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static inline int __raw_read_trylock(raw_rwlock_t *rw)
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{
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return __raw_read_trylock_asm(&rw->lock);
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}
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static inline void __raw_read_unlock(raw_rwlock_t *rw)
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{
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__raw_read_unlock_asm(&rw->lock);
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}
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static inline void __raw_write_lock(raw_rwlock_t *rw)
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{
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__raw_write_lock_asm(&rw->lock);
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}
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static inline int __raw_write_trylock(raw_rwlock_t *rw)
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{
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return __raw_write_trylock_asm(&rw->lock);
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}
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static inline void __raw_write_unlock(raw_rwlock_t *rw)
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{
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__raw_write_unlock_asm(&rw->lock);
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}
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#define _raw_spin_relax(lock) cpu_relax()
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#define _raw_read_relax(lock) cpu_relax()
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#define _raw_write_relax(lock) cpu_relax()
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#endif /* !__BFIN_SPINLOCK_H */
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