debranch SMP, have fun

1 files changed, 72 insertions, 0 deletions

diff --git a/sys/arch/i386/include/atomic.h b/sys/arch/i386/include/atomic.h
new file mode 100644
index 00000000000..e3be6b68b1b
--- /dev/null
+++ b/sys/arch/i386/include/atomic.h
@@ -0,0 +1,72 @@
+/*	$OpenBSD: atomic.h,v 1.2 2004/06/13 21:49:16 niklas Exp $	*/
+/* $NetBSD: atomic.h,v 1.1.2.2 2000/02/21 18:54:07 sommerfeld Exp $ */
+
+/*-
+ * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by RedBack Networks Inc.
+ *
+ * Author: Bill Sommerfeld
+ *
+ * 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. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#ifndef _ATOMIC_H_
+#define _ATOMIC_H_
+
+#ifndef _LOCORE
+
+static __inline u_int32_t
+i386_atomic_testset_ul (volatile u_int32_t *ptr, unsigned long val) {
+    __asm__ volatile ("xchgl %0,(%2)" :"=r" (val):"0" (val),"r" (ptr));
+    return val;
+}
+
+static __inline int
+i386_atomic_testset_i (volatile int *ptr, unsigned long val) {
+    __asm__ volatile ("xchgl %0,(%2)" :"=r" (val):"0" (val),"r" (ptr));
+    return val;
+}
+
+static __inline void 
+i386_atomic_setbits_l (volatile u_int32_t *ptr, unsigned long bits) {
+    __asm __volatile("lock ; orl %1,%0" :  "=m" (*ptr) : "ir" (bits));
+}
+
+static __inline void 
+i386_atomic_clearbits_l (volatile u_int32_t *ptr, unsigned long bits) {
+    bits = ~bits;
+    __asm __volatile("lock ; and %1,%0" :  "=m" (*ptr) : "ir" (bits));
+}
+
+#endif
+#endif
+