diff options
Diffstat (limited to 'include/asm-cris/arch-v32/atomic.h')
| -rw-r--r-- | include/asm-cris/arch-v32/atomic.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/asm-cris/arch-v32/atomic.h b/include/asm-cris/arch-v32/atomic.h new file mode 100644 index 000000000000..bbfb7a5ae315 --- /dev/null +++ b/include/asm-cris/arch-v32/atomic.h @@ -0,0 +1,36 @@ +#ifndef __ASM_CRIS_ARCH_ATOMIC__ +#define __ASM_CRIS_ARCH_ATOMIC__ + +#include <asm/system.h> + +extern void cris_spin_unlock(void *l, int val); +extern void cris_spin_lock(void *l); +extern int cris_spin_trylock(void* l); + +#ifndef CONFIG_SMP +#define cris_atomic_save(addr, flags) local_irq_save(flags); +#define cris_atomic_restore(addr, flags) local_irq_restore(flags); +#else + +extern spinlock_t cris_atomic_locks[]; +#define LOCK_COUNT 128 +#define HASH_ADDR(a) (((int)a) & 127) + +#define cris_atomic_save(addr, flags) \ + local_irq_save(flags); \ + cris_spin_lock((void*)&cris_atomic_locks[HASH_ADDR(addr)].lock); + +#define cris_atomic_restore(addr, flags) \ + { \ + spinlock_t *lock = (void*)&cris_atomic_locks[HASH_ADDR(addr)]; \ + __asm__ volatile ("move.d %1,%0" \ + : "=m" (lock->lock) \ + : "r" (1) \ + : "memory"); \ + local_irq_restore(flags); \ + } + +#endif + +#endif + |