1*5d9d9091SRichard Lowe/* 2*5d9d9091SRichard Lowe * CDDL HEADER START 3*5d9d9091SRichard Lowe * 4*5d9d9091SRichard Lowe * The contents of this file are subject to the terms of the 5*5d9d9091SRichard Lowe * Common Development and Distribution License (the "License"). 6*5d9d9091SRichard Lowe * You may not use this file except in compliance with the License. 7*5d9d9091SRichard Lowe * 8*5d9d9091SRichard Lowe * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*5d9d9091SRichard Lowe * or http://www.opensolaris.org/os/licensing. 10*5d9d9091SRichard Lowe * See the License for the specific language governing permissions 11*5d9d9091SRichard Lowe * and limitations under the License. 12*5d9d9091SRichard Lowe * 13*5d9d9091SRichard Lowe * When distributing Covered Code, include this CDDL HEADER in each 14*5d9d9091SRichard Lowe * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*5d9d9091SRichard Lowe * If applicable, add the following below this CDDL HEADER, with the 16*5d9d9091SRichard Lowe * fields enclosed by brackets "[]" replaced with your own identifying 17*5d9d9091SRichard Lowe * information: Portions Copyright [yyyy] [name of copyright owner] 18*5d9d9091SRichard Lowe * 19*5d9d9091SRichard Lowe * CDDL HEADER END 20*5d9d9091SRichard Lowe */ 21*5d9d9091SRichard Lowe/* 22*5d9d9091SRichard Lowe * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 23*5d9d9091SRichard Lowe * Use is subject to license terms. 24*5d9d9091SRichard Lowe */ 25*5d9d9091SRichard Lowe 26*5d9d9091SRichard Lowe .file "lock.s" 27*5d9d9091SRichard Lowe 28*5d9d9091SRichard Lowe#include <sys/asm_linkage.h> 29*5d9d9091SRichard Lowe 30*5d9d9091SRichard Lowe/* 31*5d9d9091SRichard Lowe * lock_try(lp) 32*5d9d9091SRichard Lowe * - returns non-zero on success. 33*5d9d9091SRichard Lowe */ 34*5d9d9091SRichard Lowe ENTRY(_lock_try) 35*5d9d9091SRichard Lowe ldstub [%o0], %o1 ! try to set lock, get value in %o1 36*5d9d9091SRichard Lowe membar #LoadLoad 37*5d9d9091SRichard Lowe retl 38*5d9d9091SRichard Lowe xor %o1, 0xff, %o0 ! delay - return non-zero if success 39*5d9d9091SRichard Lowe SET_SIZE(_lock_try) 40*5d9d9091SRichard Lowe 41*5d9d9091SRichard Lowe/* 42*5d9d9091SRichard Lowe * lock_clear(lp) 43*5d9d9091SRichard Lowe * - clear lock. 44*5d9d9091SRichard Lowe */ 45*5d9d9091SRichard Lowe ENTRY(_lock_clear) 46*5d9d9091SRichard Lowe membar #LoadStore|#StoreStore 47*5d9d9091SRichard Lowe retl 48*5d9d9091SRichard Lowe clrb [%o0] 49*5d9d9091SRichard Lowe SET_SIZE(_lock_clear) 50