82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
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/* $NetBSD: mutex.h,v 1.2 2007/02/09 21:55:01 ad Exp $ */
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/*-
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* Copyright (c) 2002, 2006, 2007 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe and Andrew Doran.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ALPHA_MUTEX_H_
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#define _ALPHA_MUTEX_H_
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#ifndef __MUTEX_PRIVATE
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struct kmutex {
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uintptr_t mtx_pad1;
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uint32_t mtx_pad2;
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uint32_t mtx_pad3;
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};
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#else /* __MUTEX_PRIVATE */
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struct kmutex {
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union {
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volatile uintptr_t mtxa_owner;
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struct {
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volatile uint8_t mtxs_flags;
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ipl_cookie_t mtxs_ipl;
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volatile uint16_t mtxs_unused;
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} s;
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} u;
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__cpu_simple_lock_t mtx_lock;
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volatile uint32_t mtx_id;
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};
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#define mtx_owner u.mtxa_owner
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#define mtx_flags u.s.mtxs_flags
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#define mtx_ipl u.s.mtxs_ipl
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#define __HAVE_SIMPLE_MUTEXES 1
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#define __HAVE_MUTEX_STUBS 1
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#define MUTEX_RECEIVE(mtx) mb_read()
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#define MUTEX_GIVE(mtx) mb_memory()
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#define MUTEX_CAS(p, o, n) _lock_cas((p), (o), (n))
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int _lock_cas(volatile uintptr_t *, uintptr_t, uintptr_t);
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#endif /* __MUTEX_PRIVATE */
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#endif /* _ALPHA_MUTEX_H_ */
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