1/* $NetBSD: membar_ops.S,v 1.5 2012/08/03 06:06:44 matt Exp $ */ 2 3/*- 4 * Copyright (c) 2006, 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe, and by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "atomic_op_asm.h" 33 34#if defined(_KERNEL) 35 36#ifdef _KERNEL_OPT 37#include "opt_cputype.h" 38#include "opt_lockdebug.h" 39#include "opt_multiprocessor.h" 40#endif 41 42 43#include <machine/cpu.h> 44 45#if (MIPS_HAS_LLSC != 0 && defined(MULTIPROCESSOR)) || !defined(__mips_o32) 46#define SYNC sync 47#endif 48#elif !defined(__mips_o32) 49#define SYNC sync 50#endif 51 52 .text 53 .set noreorder 54 55LEAF(_membar_sync) 56 j ra 57#ifdef SYNC 58 SYNC 59#else 60 nop 61#endif 62END(_membar_sync) 63 64#ifdef _KERNEL 65STRONG_ALIAS(mb_read, _membar_sync) 66STRONG_ALIAS(mb_write, _membar_sync) 67STRONG_ALIAS(mb_memory, _membar_sync) 68#endif 69 70ATOMIC_OP_ALIAS(membar_sync,_membar_sync) 71ATOMIC_OP_ALIAS(membar_enter,_membar_sync) 72STRONG_ALIAS(_membar_enter,_membar_sync) 73ATOMIC_OP_ALIAS(membar_exit,_membar_sync) 74STRONG_ALIAS(_membar_exit,_membar_sync) 75ATOMIC_OP_ALIAS(membar_producer,_membar_sync) 76STRONG_ALIAS(_membar_producer,_membar_sync) 77ATOMIC_OP_ALIAS(membar_consumer,_membar_sync) 78STRONG_ALIAS(_membar_consumer,_membar_sync) 79