1 /* $NetBSD: atomic_op_asm.h,v 1.6 2014/03/07 07:17:54 matt 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