1 files changed, 54 insertions, 0 deletions
diff --git a/sys/arch/mips64/include/lock.h b/sys/arch/mips64/include/lock.h
new file mode 100644
index 00000000000..be9b39b8e4c
--- /dev/null
+++ b/sys/arch/mips64/include/lock.h
@@ -0,0 +1,54 @@
+/*	$OpenBSD: lock.h,v 1.1 2007/05/01 18:56:30 miod Exp $	*/
+
+/* public domain */
+
+#ifndef	_MIPS64_LOCK_H_
+#define	_MIPS64_LOCK_H_
+
+typedef volatile u_int __cpu_simple_lock_t;
+
+#define	__SIMPLELOCK_LOCKED	1
+#define	__SIMPLELOCK_UNLOCKED	0
+
+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, new;
+
+	do {
+		new = __SIMPLELOCK_LOCKED;
+		__asm__ __volatile__
+		   ("1:\tll\t%0, %1\n" 
+		    "\tsc\t%2, %1\n"
+		    "\tbeqz\t%2, 1b\n"
+		    "\t nop" : "=r" (old) : "m" (*l), "r" (new));
+	} while (old != __SIMPLELOCK_UNLOCKED);
+}
+
+static __inline__ int
+__cpu_simple_lock_try(__cpu_simple_lock_t *l)
+{
+	__cpu_simple_lock_t old, new = __SIMPLELOCK_LOCKED;
+
+	__asm__ __volatile__
+	   ("1:\tll\t%0, %1\n" 
+	    "\tsc\t%2, %1\n"
+	    "\tbeqz\t%2, 1b\n"
+	    "\t nop" : "=r" (old) : "m" (*l), "r" (new));
+
+	return (old == __SIMPLELOCK_UNLOCKED);
+}
+
+static __inline__ void
+__cpu_simple_unlock(__cpu_simple_lock_t *l)
+{
+	*l = __SIMPLELOCK_UNLOCKED;
+}
+
+#endif	/* _MIPS64_LOCK_H_ */