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_ */