membar_ops.S revision 1.4 
11.4Sad/*	$NetBSD: membar_ops.S,v 1.4 2008/02/12 18:40:28 ad Exp $	*/
21.2Sad
31.2Sad/*-
41.2Sad * Copyright (c) 2006, 2007 The NetBSD Foundation, Inc.
51.2Sad * All rights reserved.
61.2Sad *
71.2Sad * This code is derived from software contributed to The NetBSD Foundation
81.2Sad * by Jason R. Thorpe.
91.2Sad *
101.2Sad * Redistribution and use in source and binary forms, with or without
111.2Sad * modification, are permitted provided that the following conditions
121.2Sad * are met:
131.2Sad * 1. Redistributions of source code must retain the above copyright
141.2Sad *    notice, this list of conditions and the following disclaimer.
151.2Sad * 2. Redistributions in binary form must reproduce the above copyright
161.2Sad *    notice, this list of conditions and the following disclaimer in the
171.2Sad *    documentation and/or other materials provided with the distribution.
181.2Sad * 3. All advertising materials mentioning features or use of this software
191.2Sad *    must display the following acknowledgement:
201.2Sad *	This product includes software developed by the NetBSD
211.2Sad *	Foundation, Inc. and its contributors.
221.2Sad * 4. Neither the name of The NetBSD Foundation nor the names of its
231.2Sad *    contributors may be used to endorse or promote products derived
241.2Sad *    from this software without specific prior written permission.
251.2Sad *
261.2Sad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
271.2Sad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
281.2Sad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
291.2Sad * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
301.2Sad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
311.2Sad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
321.2Sad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
331.2Sad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
341.2Sad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
351.2Sad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
361.2Sad * POSSIBILITY OF SUCH DAMAGE.
371.2Sad */
381.2Sad
391.2Sad#include "atomic_op_asm.h"
401.2Sad
411.2Sad	.text
421.2Sad
431.4Sad#ifdef _KERNEL
441.4Sad
451.2Sad/*
461.2Sad * We start out with no-op versions that do nothing.  We hot-patch when
471.2Sad * we detect a MP system.
481.2Sad */
491.2SadLEAF_NOPROFILE(_membar_producer, 0)
501.2Sad	RET
511.2Sad	nop
521.2Sad	END(_membar_producer)
531.2SadEXPORT(_membar_producer_end)
541.2Sad
551.2SadLEAF_NOPROFILE(_membar_sync, 0)
561.2Sad	RET
571.2Sad	nop
581.2Sad	END(_membar_sync)
591.2SadEXPORT(_membar_sync_end)
601.3Smatt
611.2SadLEAF_NOPROFILE(_membar_producer_mp, 0)
621.2Sad	wmb
631.2Sad	RET
641.2Sad	END(_membar_producer_mp)
651.2SadEXPORT(_membar_producer_mp_end)
661.2Sad
671.2SadLEAF_NOPROFILE(_membar_sync_mp, 0)
681.2Sad	mb
691.2Sad	RET
701.2Sad	END(_membar_sync_mp)
711.2SadEXPORT(_membar_sync_mp_end)
721.2Sad
731.4Sad#else	/* _KERNEL */
741.4Sad
751.4SadLEAF_NOPROFILE(_membar_producer, 0)
761.4Sad	mb
771.4Sad	RET
781.4Sad	END(_membar_producer)
791.4SadEXPORT(_membar_producer_end)
801.4Sad
811.4SadLEAF_NOPROFILE(_membar_sync, 0)
821.4Sad	mb
831.4Sad	RET
841.4Sad	END(_membar_sync)
851.4SadEXPORT(_membar_sync_end)
861.4Sad
871.4Sad#endif	/* _KERNEL */
881.4Sad
891.4SadATOMIC_OP_ALIAS(membar_producer,_membar_producer)
901.4SadATOMIC_OP_ALIAS(membar_sync,_membar_sync)
911.4SadATOMIC_OP_ALIAS(membar_enter,_membar_sync)
921.4SadSTRONG_ALIAS(_membar_enter,_membar_sync)
931.4SadATOMIC_OP_ALIAS(membar_exit,_membar_sync)
941.4SadSTRONG_ALIAS(_membar_exit,_membar_sync)
951.4SadATOMIC_OP_ALIAS(membar_consumer,_membar_sync)
961.4SadSTRONG_ALIAS(_membar_consumer,_membar_sync)
97