atomic_swap.S revision 1.3 
11.3Sbouyer/*	$NetBSD: atomic_swap.S,v 1.3 2011/08/27 13:23:52 bouyer Exp $	*/
21.2Smatt
31.2Smatt/*-
41.2Smatt * Copyright (c) 2008 The NetBSD Foundation, Inc.
51.2Smatt * All rights reserved.
61.2Smatt *
71.2Smatt * Redistribution and use in source and binary forms, with or without
81.2Smatt * modification, are permitted provided that the following conditions
91.2Smatt * are met:
101.2Smatt * 1. Redistributions of source code must retain the above copyright
111.2Smatt *    notice, this list of conditions and the following disclaimer.
121.2Smatt * 2. Redistributions in binary form must reproduce the above copyright
131.2Smatt *    notice, this list of conditions and the following disclaimer in the
141.2Smatt *    documentation and/or other materials provided with the distribution.
151.2Smatt *
161.2Smatt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
171.2Smatt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
181.2Smatt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
191.2Smatt * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
201.2Smatt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
211.2Smatt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
221.2Smatt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
231.2Smatt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
241.2Smatt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
251.2Smatt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
261.2Smatt * POSSIBILITY OF SUCH DAMAGE.
271.2Smatt */
281.2Smatt
291.2Smatt#include <sys/cdefs.h>
301.2Smatt#include <machine/asm.h>
311.2Smatt#include "atomic_op_asm.h"
321.2Smatt
331.3SbouyerRCSID("$NetBSD: atomic_swap.S,v 1.3 2011/08/27 13:23:52 bouyer Exp $")
341.2Smatt
351.2Smatt	.text
361.3Sbouyer	.set	noreorder
371.3Sbouyer#ifdef _KERNEL_OPT
381.3Sbouyer#include "opt_cputype.h"
391.3Sbouyer#ifndef MIPS3_LOONGSON2F
401.3Sbouyer	.set	noat
411.3Sbouyer	.set	nomacro
421.3Sbouyer#endif
431.3Sbouyer#else /* _KERNEL_OPT */
441.2Smatt	.set	noat
451.2Smatt	.set	nomacro
461.3Sbouyer#endif /* _KERNEL_OPT */
471.3Sbouyer
481.2Smatt
491.2SmattLEAF(_atomic_swap_32)
501.2Smatt1:	INT_LL		v0, 0(a0)
511.2Smatt	 nop
521.2Smatt	move		t0, a1
531.2Smatt	INT_SC		t0, 0(a0)
541.2Smatt	beq		t0, zero, 1b
551.2Smatt 	 nop
561.2Smatt2:
571.2Smatt	j		ra
581.2Smatt	 nop
591.2SmattEND(_atomic_swap_32)
601.2SmattATOMIC_OP_ALIAS(atomic_swap_32, _atomic_swap_32)
611.2Smatt
621.2Smatt#if !defined(__mips_o32)
631.2SmattLEAF(_atomic_swap_64)
641.2Smatt1:	REG_LL		v0, 0(a0)
651.2Smatt	 nop
661.2Smatt	move		t0, a1
671.2Smatt	REG_SC		t0, 0(a0)
681.2Smatt	beq		t0, zero, 1b
691.2Smatt 	 nop
701.2Smatt2:
711.2Smatt	j		ra
721.2Smatt	 nop
731.2SmattEND(_atomic_swap_64)
741.2SmattATOMIC_OP_ALIAS(atomic_swap_64, _atomic_swap_64)
751.2Smatt#endif
761.2Smatt
771.2Smatt#ifdef _LP64
781.2SmattSTRONG_ALIAS(_atomic_swap_ptr,		_atomic_swap_64)
791.2SmattSTRONG_ALIAS(_atomic_swap_ulong,	_atomic_swap_64)
801.2Smatt#else
811.2SmattSTRONG_ALIAS(_atomic_swap_ptr,		_atomic_swap_32)
821.2SmattSTRONG_ALIAS(_atomic_swap_ulong,	_atomic_swap_32)
831.2Smatt#endif
841.2SmattSTRONG_ALIAS(_atomic_swap_uint,		_atomic_swap_32)
851.2Smatt
861.2SmattATOMIC_OP_ALIAS(atomic_swap_ptr,	_atomic_swap_ptr)
871.2SmattATOMIC_OP_ALIAS(atomic_swap_uint,	_atomic_swap_uint)
881.2SmattATOMIC_OP_ALIAS(atomic_swap_ulong,	_atomic_swap_ulong)
89