1 /* $NetBSD: xlate.h,v 1.1.1.1 2008/12/22 00:18:44 haad Exp $ */ 2 3 /* 4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. 5 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. 6 * 7 * This file is part of LVM2. 8 * 9 * This copyrighted material is made available to anyone wishing to use, 10 * modify, copy, or redistribute it subject to the terms and conditions 11 * of the GNU Lesser General Public License v.2.1. 12 * 13 * You should have received a copy of the GNU Lesser General Public License 14 * along with this program; if not, write to the Free Software Foundation, 15 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 16 */ 17 18 #ifndef _LVM_XLATE_H 19 #define _LVM_XLATE_H 20 21 #ifdef linux 22 # include <endian.h> 23 # include <byteswap.h> 24 #else 25 # include <machine/endian.h> 26 # define bswap_16(x) (((x) & 0x00ffU) << 8 | \ 27 ((x) & 0xff00U) >> 8) 28 # define bswap_32(x) (((x) & 0x000000ffU) << 24 | \ 29 ((x) & 0xff000000U) >> 24 | \ 30 ((x) & 0x0000ff00U) << 8 | \ 31 ((x) & 0x00ff0000U) >> 8) 32 # define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \ 33 ((x) & 0xff00000000000000ULL) >> 56 | \ 34 ((x) & 0x000000000000ff00ULL) << 40 | \ 35 ((x) & 0x00ff000000000000ULL) >> 40 | \ 36 ((x) & 0x0000000000ff0000ULL) << 24 | \ 37 ((x) & 0x0000ff0000000000ULL) >> 24 | \ 38 ((x) & 0x00000000ff000000ULL) << 8 | \ 39 ((x) & 0x000000ff00000000ULL) >> 8) 40 #endif 41 42 #if BYTE_ORDER == LITTLE_ENDIAN 43 # define xlate16(x) (x) 44 # define xlate32(x) (x) 45 # define xlate64(x) (x) 46 # define xlate16_be(x) bswap_16(x) 47 # define xlate32_be(x) bswap_32(x) 48 # define xlate64_be(x) bswap_64(x) 49 #elif BYTE_ORDER == BIG_ENDIAN 50 # define xlate16(x) bswap_16(x) 51 # define xlate32(x) bswap_32(x) 52 # define xlate64(x) bswap_64(x) 53 # define xlate16_be(x) (x) 54 # define xlate32_be(x) (x) 55 # define xlate64_be(x) (x) 56 #else 57 # include <asm/byteorder.h> 58 # define xlate16(x) __cpu_to_le16((x)) 59 # define xlate32(x) __cpu_to_le32((x)) 60 # define xlate64(x) __cpu_to_le64((x)) 61 # define xlate16_be(x) __cpu_to_be16((x)) 62 # define xlate32_be(x) __cpu_to_be32((x)) 63 # define xlate64_be(x) __cpu_to_be64((x)) 64 #endif 65 66 #endif 67