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      1 /*	$NetBSD: disklabel.h,v 1.9 2025/04/27 04:38:43 tsutsui 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 	uint8_t		dp_skew;	/* spiral addressing skew */
     64 	uint8_t		dp_gap1;	/* words of 0 before header */
     65 	uint8_t		dp_gap2;	/* words of 0 between hdr and data */
     66 	uint8_t		dp_spare0;	/* spare space */
     67 	uint16_t	dp_cyls;	/* number of cylinders */
     68 	uint16_t	dp_shd0;	/* starting head vol 0 */
     69 	uint16_t	dp_trks0;	/* number of tracks vol 0 */
     70 	uint16_t	dp_shd1;	/* starting head vol 1 */
     71 	uint16_t	dp_trks1;	/* number of tracks vol 1 */
     72 	uint16_t	dp_secs;	/* number of sectors/track */
     73 	uint16_t	dp_secbytes;	/* length of sector in bytes */
     74 	uint16_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 	uint32_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