Module Name: src
Committed By: riastradh
Date: Wed Jul 24 01:54:57 UTC 2013
Added Files:
src/sys/external/bsd/drm2/include/asm [riastradh-drm2]: barrier.h
Log Message:
Implement Linux memory barriers in <asm/barrier.h>.
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1.2.1 src/sys/external/bsd/drm2/include/asm/barrier.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: src/sys/external/bsd/drm2/include/asm/barrier.h
diff -u /dev/null src/sys/external/bsd/drm2/include/asm/barrier.h:1.1.2.1
--- /dev/null Wed Jul 24 01:54:57 2013
+++ src/sys/external/bsd/drm2/include/asm/barrier.h Wed Jul 24 01:54:57 2013
@@ -0,0 +1,59 @@
+/* $NetBSD: barrier.h,v 1.1.2.1 2013/07/24 01:54:57 riastradh Exp $ */
+
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Taylor R. Campbell.
+ *
+ * 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.
+ *
+ * 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 _ASM_BARRIER_H_
+#define _ASM_BARRIER_H_
+
+#include <sys/atomic.h>
+
+#define mb membar_sync
+#define wmb membar_producer
+#define rmb membar_consumer
+
+#ifdef __alpha__ /* XXX As if... */
+# define read_barrier_depends membar_sync
+#else
+# define read_barrier_depends() do {} while (0)
+#endif
+
+#ifdef MULTIPROCESSOR
+# define smp_mb mb
+# define smp_wmb wmb
+# define smp_rmb rmb
+# define smp_read_barrier_depends read_barrier_depends
+#else
+# define smp_mb() do {} while (0)
+# define smp_wmb() do {} while (0)
+# define smp_rmb() do {} while (0)
+# define smp_read_barrier_depends() do {} while (0)
+#endif
+
+#endif /* _ASM_BARRIER_H_ */
