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      1 /*	$NetBSD: atomic_op_asm.h,v 1.10 2021/07/28 08:01:10 simonb Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _ATOMIC_OP_ASM_H_
     40 #define	_ATOMIC_OP_ASM_H_
     41 
     42 #include <machine/asm.h>
     43 
     44 #if defined(_KERNEL) || defined(_STANDALONE)
     45 
     46 #define	ATOMIC_OP_ALIAS(a,s)	STRONG_ALIAS(a,s)
     47 
     48 #else /* _KERNEL */
     49 
     50 #define	ATOMIC_OP_ALIAS(a,s)	WEAK_ALIAS(a,s)
     51 #ifdef _LIBC
     52 #define	CRT_ALIAS(a,s)		STRONG_ALIAS(a,s)
     53 #endif
     54 
     55 #endif /* _KERNEL */
     56 
     57 #ifdef __ARMEB__
     58 #define	HI	r0
     59 #define	LO	r1
     60 #define	NHI	r2
     61 #define	NLO	r3
     62 #define	THI	r4
     63 #define	TLO	r5
     64 #else
     65 #define	LO	r0
     66 #define	HI	r1
     67 #define	NLO	r2
     68 #define	NHI	r3
     69 #define	TLO	r4
     70 #define	THI	r5
     71 #endif
     72 
     73 #ifndef CRT_ALIAS
     74 #define	CRT_ALIAS(a,s)
     75 #endif
     76 
     77 #ifdef _ARM_ARCH_7
     78 #define	DMB	dmb	ish
     79 #define	DMBST	dmb	ishst
     80 #else
     81 #define	DMB	mcr	p15, 0, r0, c7, c10, 5	/* Data Memory Barrier */
     82 #define	DMBST	DMB
     83 #endif
     84 
     85 #endif /* _ATOMIC_OP_ASM_H_ */
     86