diff options
author | Miod Vallat <miod@cvs.openbsd.org> | 2007-05-01 18:56:32 +0000 |
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committer | Miod Vallat <miod@cvs.openbsd.org> | 2007-05-01 18:56:32 +0000 |
commit | 70faf790f9b1740f13c9a8c5ada5076cf343467f (patch) | |
tree | 7151fb6010ac6903c59704c1a1e87c7b0130f74b /sys/arch/hppa/include/lock.h | |
parent | 6df22bec0785ffd54a2f4233e9a6238ac919c4ab (diff) |
Provide <machine/lock.h> on all platforms, so that MI code may #include it
unconditionnaly.
Diffstat (limited to 'sys/arch/hppa/include/lock.h')
-rw-r--r-- | sys/arch/hppa/include/lock.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/sys/arch/hppa/include/lock.h b/sys/arch/hppa/include/lock.h new file mode 100644 index 00000000000..9df47129a62 --- /dev/null +++ b/sys/arch/hppa/include/lock.h @@ -0,0 +1,48 @@ +/* $OpenBSD: lock.h,v 1.1 2007/05/01 18:56:30 miod Exp $ */ + +/* public domain */ + +#ifndef _HPPA_LOCK_H_ +#define _HPPA_LOCK_H_ + +typedef volatile u_int __cpu_simple_lock_t __attribute__((__aligned__(16))); + +#define __SIMPLELOCK_LOCKED 0 +#define __SIMPLELOCK_UNLOCKED 1 + +static __inline__ void +__cpu_simple_lock_init(__cpu_simple_lock_t *l) +{ + *l = __SIMPLELOCK_UNLOCKED; +} + +static __inline__ void +__cpu_simple_lock(__cpu_simple_lock_t *l) +{ + __cpu_simple_lock_t old; + + do { + old = __SIMPLELOCK_LOCKED; + __asm__ __volatile__ + ("ldcw %1, %0" : "=r" (old), "=m" (l) : "m" (l)); + } while (old != __SIMPLELOCK_UNLOCKED); +} + +static __inline__ int +__cpu_simple_lock_try(__cpu_simple_lock_t *l) +{ + __cpu_simple_lock_t old = __SIMPLELOCK_LOCKED; + + __asm__ __volatile__ + ("ldcw %1, %0" : "=r" (old), "=m" (l) : "m" (l)); + + return (old == __SIMPLELOCK_UNLOCKED); +} + +static __inline__ void +__cpu_simple_unlock(__cpu_simple_lock_t *l) +{ + *l = __SIMPLELOCK_UNLOCKED; +} + +#endif /* _HPPA_LOCK_H_ */ |