1/* $NetBSD: membar_ops.S,v 1.4 2013/11/08 22:42:52 matt Exp $ */ 2/*- 3 * Copyright (c) 2008 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Matt Thomas <matt@3am-software.com> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "atomic_op_asm.h" 32 33#ifdef _ARM_ARCH_6 34 35ENTRY_NP(_membar_producer) 36#ifdef _ARM_ARCH_7 37 dsb 38#else 39 mcr p15, 0, r0, c7, c10, 4 /* Data Synchronization Barrier */ 40#endif 41 RET 42END(_membar_producer) 43ATOMIC_OP_ALIAS(membar_producer,_membar_producer) 44ATOMIC_OP_ALIAS(membar_write,_membar_producer) 45STRONG_ALIAS(_membar_write,_membar_producer) 46 47ENTRY_NP(_membar_sync) 48#ifdef _ARM_ARCH_7 49 dmb 50#else 51 mcr p15, 0, r0, c7, c10, 5 /* Data Memory Barrier */ 52#endif 53 RET 54END(_membar_sync) 55ATOMIC_OP_ALIAS(membar_sync,_membar_sync) 56ATOMIC_OP_ALIAS(membar_enter,_membar_sync) 57ATOMIC_OP_ALIAS(membar_exit,_membar_sync) 58ATOMIC_OP_ALIAS(membar_consumer,_membar_sync) 59ATOMIC_OP_ALIAS(membar_read,_membar_sync) 60STRONG_ALIAS(__sync_synchronize,_membar_sync) 61STRONG_ALIAS(_membar_enter,_membar_sync) 62STRONG_ALIAS(_membar_exit,_membar_sync) 63STRONG_ALIAS(_membar_consumer,_membar_sync) 64STRONG_ALIAS(_membar_read,_membar_sync) 65 66#endif /* _ARM_ARCH_6 */ 67