2012-11-15 12:06:41 +01:00
|
|
|
/* $NetBSD: atomic_swap.S,v 1.4 2012/03/14 16:50:34 christos Exp $ */
|
2011-02-14 20:36:03 +01:00
|
|
|
|
|
|
|
|
/*-
|
|
|
|
|
* 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"
|
|
|
|
|
|
2012-11-15 12:06:41 +01:00
|
|
|
RCSID("$NetBSD: atomic_swap.S,v 1.4 2012/03/14 16:50:34 christos Exp $")
|
2011-02-14 20:36:03 +01:00
|
|
|
|
|
|
|
|
.text
|
|
|
|
|
.set noreorder
|
2012-11-15 12:06:41 +01:00
|
|
|
#ifdef _KERNEL_OPT
|
|
|
|
|
#include "opt_cputype.h"
|
|
|
|
|
#ifndef MIPS3_LOONGSON2F
|
|
|
|
|
.set noat
|
|
|
|
|
.set nomacro
|
|
|
|
|
#endif
|
|
|
|
|
#else /* _KERNEL_OPT */
|
|
|
|
|
.set noat
|
2011-02-14 20:36:03 +01:00
|
|
|
.set nomacro
|
2012-11-15 12:06:41 +01:00
|
|
|
#endif /* _KERNEL_OPT */
|
|
|
|
|
|
2011-02-14 20:36:03 +01:00
|
|
|
|
|
|
|
|
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
|
|
|
|
|
nop
|
|
|
|
|
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
|
|
|
|
|
nop
|
|
|
|
|
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)
|
