[src/trunk]: src/common/lib/libc/arch/arm/atomic When compiling for Thumb1, t...

[matt <matt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/24495c7384d7
branches:  trunk
changeset: 789352:24495c7384d7
user:      matt <matt%NetBSD.org@localhost>
date:      Thu Aug 15 22:42:50 2013 +0000

description:
When compiling for Thumb1, the swp instruction is not availble.  So this
stub is added to provide __cpu_simple_lock and __cpu_simple_lock_try via
thumb interwork support.  It is compiled with -mno-thumb.

diffstat:

 common/lib/libc/arch/arm/atomic/atomic_simplelock.c |  66 +++++++++++++++++++++
 1 files changed, 66 insertions(+), 0 deletions(-)

diffs (70 lines):

diff -r b51f3b7264f6 -r 24495c7384d7 common/lib/libc/arch/arm/atomic/atomic_simplelock.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/common/lib/libc/arch/arm/atomic/atomic_simplelock.c       Thu Aug 15 22:42:50 2013 +0000
@@ -0,0 +1,66 @@
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas of 3am Software Foundry.
+ *
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: atomic_simplelock.c,v 1.1 2013/08/15 22:42:50 matt Exp $");
+
+#include <sys/types.h>
+/*
+ * We need to use the inlines so redefine out of the way.
+ */
+#define        __cpu_simple_lock       __arm_simple_lock
+#define        __cpu_simple_lock_try   __arm_simple_lock_try
+#include <arm/lock.h>
+/*
+ * Now get rid of them.
+ */
+#undef __cpu_simple_lock
+#undef __cpu_simple_lock_try
+
+#if !defined(_ARM_ARCH_T2)
+/*
+ * Since we overrode lock.h we have to provide these ourselves.
+ */
+__dso_hidden void __cpu_simple_lock(__cpu_simple_lock_t *);
+__dso_hidden int __cpu_simple_lock_try(__cpu_simple_lock_t *);
+
+void
+__cpu_simple_lock(__cpu_simple_lock_t *alp)
+{
+
+       __arm_simple_lock(alp);
+}
+
+int
+__cpu_simple_lock_try(__cpu_simple_lock_t *alp)
+{
+
+       return __arm_simple_lock_try(alp);
+}
+#endif