66 lines
1.7 KiB
ArmAsm
66 lines
1.7 KiB
ArmAsm
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/*
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* Copyright (c) 1996-1997 The University of Utah and the Computer Systems
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* Laboratory at the University of Utah (CSL). All rights reserved.
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*
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* Permission to use, copy, modify and distribute this software is hereby
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* granted provided that (1) source code retains these copyright, permission,
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* and disclaimer notices, and (2) redistributions including binaries
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* reproduce the notices in supporting documentation, and (3) all advertising
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* materials mentioning features or use of this software display the following
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* acknowledgement: ``This product includes software developed by the Computer
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* Systems Laboratory at the University of Utah.''
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*
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* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
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* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
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* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* CSL requests users of this software to return to csl-dist@cs.utah.edu any
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* improvements that they make and grant CSL redistribution rights.
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*
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* @(#)tsl_parisc.s 8.4 (Sleepycat) 1/18/97
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*/
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/*
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* Spin locks for the PA-RISC. Based on Bob Wheeler's Mach implementation.
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*/
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.SPACE $TEXT$
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.SUBSPA $CODE$
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/*
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* int tsl_set(tsl_t *tsl)
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*
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* Try to acquire a lock, return 1 if successful, 0 if not.
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*/
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.EXPORT tsl_set,ENTRY
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tsl_set
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.PROC
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.CALLINFO FRAME=0,NO_CALLS
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.ENTRY
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ldo 15(%r26),%r26
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depi 0,31,4,%r26
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ldcws 0(%r26),%r28
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subi,= 0,%r28,%r0
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ldi 1,%r28
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bv,n 0(%r2)
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.EXIT
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.PROCEND
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/*
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* void tsl_unset(tsl_t *tsl)
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*
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* Release a lock.
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*/
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.EXPORT tsl_unset,ENTRY
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tsl_unset
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.PROC
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.CALLINFO FRAME=0,NO_CALLS
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.ENTRY
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ldo 15(%r26),%r26
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ldi -1,%r19
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depi 0,31,4,%r26
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bv 0(%r2)
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stw %r19,0(%r26)
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.EXIT
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.PROCEND
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