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| author |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-12-20 04:54:54 -0500 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-12-20 04:54:54 -0500 |
| commit | 93b8eef1c098efbea2f1fc0be7e3c681f259a7e7 (patch) | |
| tree | 462cc8c2bc07bbc825dab2a200891a28d8643329 /arch/cris/include/arch-v32/arch/atomic.h | |
| parent | Input: libps2 - handle 0xfc responses from devices (diff) | |
| parent | Linux 2.6.28-rc9 (diff) | |
| download | linux-dev-93b8eef1c098efbea2f1fc0be7e3c681f259a7e7.tar.xz linux-dev-93b8eef1c098efbea2f1fc0be7e3c681f259a7e7.zip | |
Merge commit 'v2.6.28-rc9' into next
Diffstat (limited to 'arch/cris/include/arch-v32/arch/atomic.h')
| -rw-r--r-- | arch/cris/include/arch-v32/arch/atomic.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/cris/include/arch-v32/arch/atomic.h b/arch/cris/include/arch-v32/arch/atomic.h new file mode 100644 index 000000000000..852ceff8013f --- /dev/null +++ b/arch/cris/include/arch-v32/arch/atomic.h @@ -0,0 +1,36 @@ +#ifndef __ASM_CRIS_ARCH_ATOMIC__ +#define __ASM_CRIS_ARCH_ATOMIC__ + +#include <linux/spinlock_types.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)].raw_lock.slock); + +#define cris_atomic_restore(addr, flags) \ + { \ + spinlock_t *lock = (void*)&cris_atomic_locks[HASH_ADDR(addr)]; \ + __asm__ volatile ("move.d %1,%0" \ + : "=m" (lock->raw_lock.slock) \ + : "r" (1) \ + : "memory"); \ + local_irq_restore(flags); \ + } + +#endif + +#endif + |