1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#pragma ident "%Z%%M% %I% %E% SMI" 28 29 .file "%M%" 30 31#include <sys/asm_linkage.h> 32 33/* 34 * lock_try(lp) 35 * - returns non-zero on success. 36 */ 37 ENTRY(_lock_try) 38 ldstub [%o0], %o1 ! try to set lock, get value in %o1 39 membar #LoadLoad 40 retl 41 xor %o1, 0xff, %o0 ! delay - return non-zero if success 42 SET_SIZE(_lock_try) 43 44/* 45 * lock_clear(lp) 46 * - clear lock. 47 */ 48 ENTRY(_lock_clear) 49 membar #LoadStore|#StoreStore 50 retl 51 clrb [%o0] 52 SET_SIZE(_lock_clear) 53