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atomic_op_asm.h revision 1.5.12.1 
      1 /*	$NetBSD: atomic_op_asm.h,v 1.5.12.1 2014/08/19 23:45:13 tls 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _ATOMIC_OP_ASM_H_
     33 #define	_ATOMIC_OP_ASM_H_
     34 
     35 #include <machine/asm.h>
     36 
     37 #if defined(_KERNEL)
     38 
     39 #define	ATOMIC_OP_ALIAS(a,s)	STRONG_ALIAS(a,s)
     40 
     41 #else /* _KERNEL */
     42 
     43 #define	ATOMIC_OP_ALIAS(a,s)	WEAK_ALIAS(a,s)
     44 
     45 #endif /* _KERNEL */
     46 
     47 #define	ATOMIC_OP_32_ARG(op,insn,arg) \
     48 ENTRY(_atomic_##op##_32)	; \
     49 	mr	%r10,%r3	; \
     50 1:	lwarx	%r3,0,%r10	; \
     51 	insn	%r5,%r3,arg	; \
     52 	stwcx.	%r5,0,%r10	; \
     53 	beqlr+			; \
     54 	b	1b		; \
     55 END(_atomic_##op##_32)		; \
     56 ATOMIC_OP_ALIAS(atomic_##op##_32,_atomic_##op##_32)
     57 
     58 #define	ATOMIC_OP_64_ARG(op,insn,arg) \
     59 ENTRY(_atomic_##op##_64)	; \
     60 	mr	%r10,%r3	; \
     61 1:	ldarx	%r3,0,%r10	; \
     62 	insn	%r5,%r3,arg	; \
     63 	stdcx.	%r5,0,%r10	; \
     64 	beqlr+			; \
     65 	b	1b		; \
     66 END(_atomic_##op##_64)		; \
     67 ATOMIC_OP_ALIAS(atomic_##op##_64,_atomic_##op##_64)
     68 
     69 #define	ATOMIC_OP_32_ARG_NV(op,insn,arg) \
     70 ENTRY(_atomic_##op##_32_nv)	; \
     71 	mr	%r10,%r3	; \
     72 1:	lwarx	%r3,0,%r10	; \
     73 	insn	%r3,%r3,arg	; \
     74 	stwcx.	%r3,0,%r10	; \
     75 	beqlr+			; \
     76 	b	1b		; \
     77 END(_atomic_##op##_32_nv)	; \
     78 ATOMIC_OP_ALIAS(atomic_##op##_32_nv,_atomic_##op##_32_nv)
     79 
     80 #define	ATOMIC_OP_64_ARG_NV(op,insn,arg) \
     81 ENTRY(_atomic_##op##_64_nv)	; \
     82 	mr	%r10,%r3	; \
     83 1:	ldarx	%r3,0,%r10	; \
     84 	insn	%r3,%r3,arg	; \
     85 	stdcx.	%r3,0,%r10	; \
     86 	beqlr+			; \
     87 	b	1b		; \
     88 END(_atomic_##op##_64_nv)	; \
     89 ATOMIC_OP_ALIAS(atomic_##op##_64_nv,_atomic_##op##_64_nv)
     90 
     91 #define ATOMIC_OP_32(op)	ATOMIC_OP_32_ARG(op,op,%r4)
     92 #define ATOMIC_OP_32_NV(op)	ATOMIC_OP_32_ARG_NV(op,op,%r4)
     93 
     94 #define ATOMIC_OP_64(op)	ATOMIC_OP_64_ARG(op,op,%r4)
     95 #define ATOMIC_OP_64_NV(op)	ATOMIC_OP_64_ARG_NV(op,op,%r4)
     96 
     97 #endif /* _ATOMIC_OP_ASM_H_ */
     98