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Implement __cpu_simple_lock{,init,try}() for sh5.

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scw 2002-12-07 22:31:33 +00:00
parent 12a1bc1fff
commit d4cfbd3754
1 changed files with 36 additions and 1 deletions
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37
sys/arch/sh5/include/lock.h
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@ -1,4 +1,4 @@
/* $NetBSD: lock.h,v 1.1 2002/07/05 13:32:00 scw Exp $ */
/* $NetBSD: lock.h,v 1.2 2002/12/07 22:31:33 scw Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
@ -52,4 +52,39 @@ typedef __volatile long __cpu_simple_lock_t;
#define __SIMPLELOCK_LOCKED 1
#define __SIMPLELOCK_UNLOCKED 0
static __inline void
__cpu_simple_lock_init(__cpu_simple_lock_t *alp)
{
*alp = __SIMPLELOCK_UNLOCKED;
}
static __inline void
__cpu_simple_lock(__cpu_simple_lock_t *alp)
{
register_t l;
do {
__asm __volatile("movi 1, %0; swap.q %1, r63, %0" :
"=r"(l) : "r"(alp));
} while (l == __SIMPLELOCK_LOCKED);
}
static __inline int
__cpu_simple_lock_try(__cpu_simple_lock_t *alp)
{
register_t l;
__asm __volatile("movi 1, %0; swap.q %1, r63, %0" : "=r"(l) : "r"(alp));
return (__SIMPLELOCK_LOCKED - (int)l);
}
static __inline void
__cpu_simple_unlock(__cpu_simple_lock_t *alp)
{
*alp = __SIMPLELOCK_UNLOCKED;
}
#endif /* _SH5_LOCK_H_ */