1/* $NetBSD: pthread_md.S,v 1.1 2009/05/16 22:20:40 ad Exp $ */ 2 3/* 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wayne Knowles 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 <machine/asm.h> 33 34LEAF_ENTRY(pthread__ras_simple_lock_init) 35 ldi 1,%ret0 /* 1 == unlocked */ 36 stw %ret0,0(%arg0) 37 stw %ret0,4(%arg0) 38 stw %ret0,8(%arg0) 39 stw %ret0,12(%arg0) 40 bv,n %r0(%rp) 41EXIT(pthread__ras_simple_lock_init) 42 43 .global pthread__lock_ras_start 44 .global pthread__lock_ras_end 45 46LEAF_ENTRY(pthread__ras_simple_lock_try) 47 ldo 15(%arg0),%arg0 48 depi 0,31,4,%arg0 49 50pthread__lock_ras_start: 51 ldw 0(%arg0),%ret0 52 stw %r0,0(%arg0) /* 0 == locked */ 53pthread__lock_ras_end: 54 55 comiclr,= 0,%ret0,%ret0 /* if locked return 0 */ 56 ldi 1,%ret0 /* else return 1 */ 57 bv,n %r0(%rp) 58EXIT(pthread__ras_simple_lock_try) 59 60 61LEAF_ENTRY(pthread__ras_simple_unlock) 62 ldo 15(%arg0),%arg0 63 depi 0,31,4,%arg0 64 ldi 1,%ret0 /* 1 == unlocked */ 65 bv %r0(%rp) 66 stw %ret0,0(%arg0) 67EXIT(pthread__ras_simple_unlock) 68