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/* $NetBSD: atomic_swap.S,v 1.5 2015/06/01 23:16:54 matt Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <machine/asm.h>
#include "atomic_op_asm.h"
RCSID("$NetBSD: atomic_swap.S,v 1.5 2015/06/01 23:16:54 matt Exp $")
.text
.set noreorder
#ifdef _KERNEL_OPT
#include "opt_cputype.h"
#ifndef MIPS3_LOONGSON2F
.set noat
.set nomacro
#endif
#else /* _KERNEL_OPT */
.set noat
.set nomacro
#endif /* _KERNEL_OPT */
LEAF(_atomic_swap_32)
1: INT_LL v0, 0(a0)
nop
move t0, a1
INT_SC t0, 0(a0)
beq t0, zero, 1b
nop
2:
j ra
SYNCW
END(_atomic_swap_32)
ATOMIC_OP_ALIAS(atomic_swap_32, _atomic_swap_32)
#if !defined(__mips_o32)
LEAF(_atomic_swap_64)
1: REG_LL v0, 0(a0)
nop
move t0, a1
REG_SC t0, 0(a0)
beq t0, zero, 1b
nop
2:
j ra
SYNCW
END(_atomic_swap_64)
ATOMIC_OP_ALIAS(atomic_swap_64, _atomic_swap_64)
#endif
#ifdef _LP64
STRONG_ALIAS(_atomic_swap_ptr, _atomic_swap_64)
STRONG_ALIAS(_atomic_swap_ulong, _atomic_swap_64)
#else
STRONG_ALIAS(_atomic_swap_ptr, _atomic_swap_32)
STRONG_ALIAS(_atomic_swap_ulong, _atomic_swap_32)
#endif
STRONG_ALIAS(_atomic_swap_uint, _atomic_swap_32)
ATOMIC_OP_ALIAS(atomic_swap_ptr, _atomic_swap_ptr)
ATOMIC_OP_ALIAS(atomic_swap_uint, _atomic_swap_uint)
ATOMIC_OP_ALIAS(atomic_swap_ulong, _atomic_swap_ulong)
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