1 /* $NetBSD: disklabel.h,v 1.8 2011/08/30 12:39:56 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 2000 Wayne Knowles. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Christopher G. Demetriou. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _MACHINE_DISKLABEL_H_ 33 #define _MACHINE_DISKLABEL_H_ 34 35 /* 36 * MIPS partition conventions: 37 * 38 * Partition 0 - root 39 * Partition 1 - swap 40 * Partition 6 - usr 41 * Partition 7 - volume body 42 * Partition 8 - volume header 43 * Partition 10 - whole disk 44 */ 45 46 #define LABELUSESMBR 0 /* no MBR partitionning */ 47 #define LABELSECTOR 1 48 #define LABELOFFSET 0 49 #define MAXPARTITIONS 8 /* XXX - NetBSD Compatibility */ 50 #define RAW_PART 2 51 52 #define MIPS_PARTITIONS 16 /* Number or partitions for Mips */ 53 #define MIPS_NVOLDIR 15 /* Number of volume directory files */ 54 #define MIPS_VDIRSZ 8 /* File name size in volume directory */ 55 #define MIPS_BFSIZE 16 /* Boot filename size */ 56 #define MIPS_VHSECTOR 0 /* Sector number for MIPS volume header */ 57 58 /* 59 * Devices parameters that RISC/os uses for mapping logical block numbers 60 * to physical device addresses. 61 */ 62 struct mips_devparams { 63 u_int8_t dp_skew; /* spiral addressing skew */ 64 u_int8_t dp_gap1; /* words of 0 before header */ 65 u_int8_t dp_gap2; /* words of 0 between hdr and data */ 66 u_int8_t dp_spare0; /* spare space */ 67 u_int16_t dp_cyls; /* number of cylinders */ 68 u_int16_t dp_shd0; /* starting head vol 0 */ 69 u_int16_t dp_trks0; /* number of tracks vol 0 */ 70 u_int16_t dp_shd1; /* starting head vol 1 */ 71 u_int16_t dp_trks1; /* number of tracks vol 1 */ 72 u_int16_t dp_secs; /* number of sectors/track */ 73 u_int16_t dp_secbytes; /* length of sector in bytes */ 74 u_int16_t dp_interleave; /* sector interleave */ 75 int32_t dp_flags; /* controller characteristics */ 76 int32_t dp_datarate; /* bytes/sec for kernel stats */ 77 int32_t dp_nretries; /* max num retries on data error */ 78 int32_t dp_spare1; /* spare entries */ 79 int32_t dp_spare2; 80 int32_t dp_spare3; 81 int32_t dp_spare4; 82 } __attribute__((__packed__)); 83 84 /* 85 * Volume directory is used as a shortcut to find bootstraps etc 86 */ 87 struct mips_voldir { /* Disk volume directory */ 88 char vd_name[MIPS_VDIRSZ]; 89 int32_t vd_lba; 90 int32_t vd_len; 91 }; 92 93 struct mips_partitions { 94 int32_t pt_size; /* # of logical blocks in partition */ 95 int32_t pt_offset; /* first logical block of partition */ 96 int32_t pt_fstype; 97 }; 98 99 /* 100 * Mips RISC/os compatible volume header and partition table 101 * 102 * 1 sector (512 bytes) in size, and normally copied to the first sector 103 * and cylinder of every track on a disk. 104 */ 105 struct mips_volheader { 106 u_int32_t vh_magic; 107 #define MIPS_VHMAGIC 0xbe5a941 108 int16_t vh_root; /* Root partition number */ 109 int16_t vh_swap; /* Swap partition number */ 110 char bootfile[MIPS_BFSIZE]; /* default file to boot */ 111 struct mips_devparams vh_dp; /* disk device parameters */ 112 struct mips_voldir vh_voldir[MIPS_NVOLDIR]; 113 struct mips_partitions vh_part[MIPS_PARTITIONS]; 114 int32_t vh_cksum; 115 int32_t vh_pad; 116 } __attribute__((__packed__)); 117 118 #define MIPS_FS_VOLHDR 0 119 #define MIPS_FS_TRKREPL 1 120 #define MIPS_FS_SECREPL 2 121 #define MIPS_FS_RAW 3 122 #define MIPS_FS_BSD 4 123 #define MIPS_FS_BSD42 4 124 #define MIPS_FS_SYSV 5 125 #define MIPS_FS_VOLUME 6 /* Entire volume */ 126 127 /* Just a dummy */ 128 struct cpu_disklabel { 129 int cd_dummy; /* must have one element. */ 130 }; 131 132 #endif /* _MACHINE_DISKLABEL_H_ */ 133