1 /* 2 * Copyright (c) 1995 Leo Weppelman. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef AHDI_H 27 #define AHDI_H 28 29 #define AHDI_BSIZE 512 /* AHDI blocksize */ 30 #define AHDI_BBLOCK 0 /* AHDI bootblock (root sector) */ 31 32 /* 33 * Various `well known' AHDI partition identifiers. 34 */ 35 #define AHDI_MKPID(x,y,z) ( ((u_int32_t)(x) << 16) \ 36 | ((u_int32_t)(y) << 8) \ 37 | ((u_int32_t)(z)) \ 38 ) 39 #define AHDI_PID_XGM AHDI_MKPID('X','G','M') 40 #define AHDI_PID_GEM AHDI_MKPID('G','E','M') 41 #define AHDI_PID_BGM AHDI_MKPID('B','G','M') 42 #define AHDI_PID_RAW AHDI_MKPID('R','A','W') 43 #define AHDI_PID_SWP AHDI_MKPID('S','W','P') 44 #define AHDI_PID_NBD AHDI_MKPID('N','B','D') 45 #define AHDI_PID_NBR AHDI_MKPID('N','B','R') 46 #define AHDI_PID_NBS AHDI_MKPID('N','B','S') 47 #define AHDI_PID_NBU AHDI_MKPID('N','B','U') 48 49 /* 50 * Format of AHDI boot block. 51 */ 52 #define AHDI_MAXRPD 4 /* max. # of partition descriptors */ 53 /* in an AHDI bootblock (aka root) */ 54 #define AHDI_MAXARPD 2 /* max. # of partition descriptors */ 55 56 /* 57 * On-disk representation of the AHDI disklabel. 58 */ 59 struct ahdi_part { 60 u_int8_t ap_flg; /* bit 0 is in-use flag */ 61 u_int8_t ap_id[3]; /* id: GEM, BGM, XGM, UNX, MIX */ 62 u_int32_t ap_st; /* block where partition starts */ 63 u_int32_t ap_size; /* partition size in blocks */ 64 }; 65 66 struct ahdi_root { 67 u_int8_t ar_fill[0x1c2];/* filler, can be boot code */ 68 u_int32_t ar_hdsize; /* size of entire volume in blocks */ 69 struct ahdi_part ar_parts[AHDI_MAXRPD]; /* root partition table */ 70 u_int32_t ar_bslst; /* start of bad-sector list */ 71 u_int32_t ar_bslsize; /* # of blocks in bad-sector list */ 72 u_int16_t ar_checksum; 73 }; 74 75 /* 76 * Partition table representation as generated by ahdi_getparts(): 77 */ 78 typedef struct { 79 char id[4]; 80 u_int start; 81 u_int end; 82 u_int rsec; 83 u_int rent; 84 int mod; 85 } part_t; 86 87 typedef struct { 88 int nparts; 89 part_t *parts; 90 } ptable_t; 91 92 /* 93 * Functions exported from ahdi.c 94 */ 95 EXTERN u_int ahdi_getparts PROTO((disk_t *, ptable_t *, u_int, u_int)); 96 #endif /* AHDI_H */ 97