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      1 /*	$NetBSD: pthread_md.S,v 1.2 2022/05/19 07:10:15 skrll 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 <sys/ras.h>
     33 #include <machine/asm.h>
     34 
     35 LEAF_ENTRY(pthread__ras_simple_lock_init)
     36 	ldi	1,%ret0			/* 1 == unlocked */
     37 	stw	%ret0,0(%arg0)
     38 	stw	%ret0,4(%arg0)
     39 	stw	%ret0,8(%arg0)
     40 	stw	%ret0,12(%arg0)
     41 	bv,n	%r0(%rp)
     42 EXIT(pthread__ras_simple_lock_init)
     43 
     44 	.global pthread__lock_ras_start
     45 	.global pthread__lock_ras_end
     46 
     47 LEAF_ENTRY(pthread__ras_simple_lock_try)
     48 	ldo	15(%arg0),%arg0
     49 	depi	0,31,4,%arg0
     50 
     51 RAS_START_ASM_HIDDEN(pthread__lock)
     52 	ldw	0(%arg0),%ret0
     53 	stw	%r0,0(%arg0)		/* 0 == locked */
     54 RAS_END_ASM_HIDDEN(pthread__lock)
     55 
     56 	comiclr,= 0,%ret0,%ret0		/* if locked return 0 */
     57 	ldi	1,%ret0			/* else return 1 */
     58 	bv,n	%r0(%rp)
     59 EXIT(pthread__ras_simple_lock_try)
     60 
     61 
     62 LEAF_ENTRY(pthread__ras_simple_unlock)
     63 	ldo	15(%arg0),%arg0
     64 	depi	0,31,4,%arg0
     65 	ldi	1,%ret0			/* 1 == unlocked */
     66 	bv	%r0(%rp)
     67 	stw	%ret0,0(%arg0)
     68 EXIT(pthread__ras_simple_unlock)
     69