1 /* $NetBSD: disklabel.h,v 1.5 1999/04/05 02:45:47 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1999 Christopher G. Demetriou 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Christopher G. Demetriou 18 * for the NetBSD Project. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef _MACHINE_DISKLABEL_H_ 35 #define _MACHINE_DISKLABEL_H_ 36 37 #define LABELSECTOR 0 /* sector containing label */ 38 #define LABELOFFSET 64 /* offset of label in sector */ 39 #define MAXPARTITIONS 8 /* number of partitions */ 40 #define RAW_PART 2 /* raw partition: xx?c */ 41 42 #include <sys/dkbad.h> 43 44 /* Just a dummy */ 45 struct cpu_disklabel { 46 struct dkbad bad; /* bad-sector information */ 47 }; 48 49 /* 50 * Alpha (disk, but also tape) Boot Block. See Section (III) 3.6.1 of the 51 * Alpha Architecture Reference Manual. 52 */ 53 54 struct boot_block { 55 u_int64_t bb_data[63]; /* data (disklabel, also as below) */ 56 u_int64_t bb_cksum; /* checksum of the the boot block, 57 * taken as u_int64_t's 58 */ 59 }; 60 #define bb_secsize bb_data[60] /* secondary size (blocks) */ 61 #define bb_secstart bb_data[61] /* secondary start (blocks) */ 62 #define bb_flags bb_data[62] /* unknown flags (set to zero) */ 63 64 #define BOOT_BLOCK_OFFSET 0 /* offset of boot block. */ 65 #define BOOT_BLOCK_BLOCKSIZE 512 /* block size for sec. size/start, 66 * and for boot block itself 67 */ 68 69 #define CHECKSUM_BOOT_BLOCK(bb,cksum) \ 70 do { \ 71 const struct boot_block *_bb = (bb); \ 72 u_int64_t _cksum; \ 73 int _i; \ 74 \ 75 _cksum = 0; \ 76 for (_i = 0; \ 77 _i < (sizeof _bb->bb_data / sizeof _bb->bb_data[0]); \ 78 _i++) \ 79 _cksum += _bb->bb_data[_i]; \ 80 *(cksum) = _cksum; \ 81 } while (0) 82 83 #endif /* _MACHINE_DISKLABEL_H_ */ 84