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      1 /*	$NetBSD: atomic_op_asm.h,v 1.8 2022/04/06 22:47:56 riastradh 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 	IBM405_ERRATA77_DCBT(0,%r10) ; \
     53 	stwcx.	%r5,0,%r10	; \
     54 	beqlr+			; \
     55 	b	1b		; \
     56 END(_atomic_##op##_32)		; \
     57 ATOMIC_OP_ALIAS(atomic_##op##_32,_atomic_##op##_32)
     58 
     59 #define	ATOMIC_OP_64_ARG(op,insn,arg) \
     60 ENTRY(_atomic_##op##_64)	; \
     61 	mr	%r10,%r3	; \
     62 1:	ldarx	%r3,0,%r10	; \
     63 	insn	%r5,%r3,arg	; \
     64 	stdcx.	%r5,0,%r10	; \
     65 	beqlr+			; \
     66 	b	1b		; \
     67 END(_atomic_##op##_64)		; \
     68 ATOMIC_OP_ALIAS(atomic_##op##_64,_atomic_##op##_64)
     69 
     70 #define	ATOMIC_OP_32_ARG_NV(op,insn,arg) \
     71 ENTRY(_atomic_##op##_32_nv)	; \
     72 	mr	%r10,%r3	; \
     73 1:	lwarx	%r3,0,%r10	; \
     74 	insn	%r3,%r3,arg	; \
     75 	IBM405_ERRATA77_DCBT(0,%r10) ; \
     76 	stwcx.	%r3,0,%r10	; \
     77 	beqlr+			; \
     78 	b	1b		; \
     79 END(_atomic_##op##_32_nv)	; \
     80 ATOMIC_OP_ALIAS(atomic_##op##_32_nv,_atomic_##op##_32_nv)
     81 
     82 #define	ATOMIC_OP_64_ARG_NV(op,insn,arg) \
     83 ENTRY(_atomic_##op##_64_nv)	; \
     84 	mr	%r10,%r3	; \
     85 1:	ldarx	%r3,0,%r10	; \
     86 	insn	%r3,%r3,arg	; \
     87 	stdcx.	%r3,0,%r10	; \
     88 	beqlr+			; \
     89 	b	1b		; \
     90 END(_atomic_##op##_64_nv)	; \
     91 ATOMIC_OP_ALIAS(atomic_##op##_64_nv,_atomic_##op##_64_nv)
     92 
     93 #define ATOMIC_OP_32(op)	ATOMIC_OP_32_ARG(op,op,%r4)
     94 #define ATOMIC_OP_32_NV(op)	ATOMIC_OP_32_ARG_NV(op,op,%r4)
     95 
     96 #define ATOMIC_OP_64(op)	ATOMIC_OP_64_ARG(op,op,%r4)
     97 #define ATOMIC_OP_64_NV(op)	ATOMIC_OP_64_ARG_NV(op,op,%r4)
     98 
     99 #endif /* _ATOMIC_OP_ASM_H_ */
    100