MP shells for the PowerPC platform.

1 files changed, 50 insertions, 0 deletions

diff --git a/sys/powerpc/include/lock.h b/sys/powerpc/include/lock.h
new file mode 100644
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--- /dev/null
+++ b/sys/powerpc/include/lock.h
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+/*
+ * Copyright (c) 1997, by Steve Passe
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. The name of the developer may NOT be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _MACHINE_LOCK_H_
+#define _MACHINE_LOCK_H_
+
+/*
+ * Simple spin lock.
+ * It is an error to hold one of these locks while a process is sleeping.
+ */
+struct simplelock {
+	volatile u_int	lock_data;
+};
+
+/* functions in mp_machdep.c */
+void	s_lock_init		__P((struct simplelock *));
+void	s_lock			__P((struct simplelock *));
+int	s_lock_try		__P((struct simplelock *));
+void	s_unlock_np		__P((struct simplelock *));
+
+#define COM_LOCK()
+#define COM_UNLOCK()
+#define COM_DISABLE_INTR()	COM_LOCK()
+#define COM_ENABLE_INTR()	COM_UNLOCK()
+
+#endif /* !_MACHINE_LOCK_H_ */