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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/blackfin/include/asm/spinlock.h |
Initial import
Diffstat (limited to 'arch/blackfin/include/asm/spinlock.h')
-rw-r--r-- | arch/blackfin/include/asm/spinlock.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/spinlock.h b/arch/blackfin/include/asm/spinlock.h new file mode 100644 index 000000000..490c7caa0 --- /dev/null +++ b/arch/blackfin/include/asm/spinlock.h @@ -0,0 +1,105 @@ +/* + * 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 <linux/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 arch_spin_is_locked(arch_spinlock_t *lock) +{ + return __raw_spin_is_locked_asm(&lock->lock); +} + +static inline void arch_spin_lock(arch_spinlock_t *lock) +{ + __raw_spin_lock_asm(&lock->lock); +} + +#define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock) + +static inline int arch_spin_trylock(arch_spinlock_t *lock) +{ + return __raw_spin_trylock_asm(&lock->lock); +} + +static inline void arch_spin_unlock(arch_spinlock_t *lock) +{ + __raw_spin_unlock_asm(&lock->lock); +} + +static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) +{ + while (arch_spin_is_locked(lock)) + cpu_relax(); +} + +static inline int arch_read_can_lock(arch_rwlock_t *rw) +{ + return __raw_uncached_fetch_asm(&rw->lock) > 0; +} + +static inline int arch_write_can_lock(arch_rwlock_t *rw) +{ + return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS; +} + +static inline void arch_read_lock(arch_rwlock_t *rw) +{ + __raw_read_lock_asm(&rw->lock); +} + +#define arch_read_lock_flags(lock, flags) arch_read_lock(lock) + +static inline int arch_read_trylock(arch_rwlock_t *rw) +{ + return __raw_read_trylock_asm(&rw->lock); +} + +static inline void arch_read_unlock(arch_rwlock_t *rw) +{ + __raw_read_unlock_asm(&rw->lock); +} + +static inline void arch_write_lock(arch_rwlock_t *rw) +{ + __raw_write_lock_asm(&rw->lock); +} + +#define arch_write_lock_flags(lock, flags) arch_write_lock(lock) + +static inline int arch_write_trylock(arch_rwlock_t *rw) +{ + return __raw_write_trylock_asm(&rw->lock); +} + +static inline void arch_write_unlock(arch_rwlock_t *rw) +{ + __raw_write_unlock_asm(&rw->lock); +} + +#define arch_spin_relax(lock) cpu_relax() +#define arch_read_relax(lock) cpu_relax() +#define arch_write_relax(lock) cpu_relax() + +#endif + +#endif /* !__BFIN_SPINLOCK_H */ |