/*      $NetBSD: disklabel.h,v 1.9 2025/04/27 04:38:43 tsutsui Exp $    */

/*
 * Copyright (c) 2000 Wayne Knowles.     All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Christopher G. Demetriou.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _MACHINE_DISKLABEL_H_
#define _MACHINE_DISKLABEL_H_

/*
 * MIPS partition conventions:
 *
 * Partition 0 - root
 * Partition 1 - swap
 * Partition 6 - usr
 * Partition 7 - volume body
 * Partition 8 - volume header
 * Partition 10 - whole disk
 */

#define LABELUSESMBR    0       /* no MBR partitionning */
#define LABELSECTOR     1
#define LABELOFFSET     0
#define MAXPARTITIONS   8       /* XXX - NetBSD Compatibility */
#define RAW_PART        2

#define MIPS_PARTITIONS 16      /* Number or partitions for Mips */
#define MIPS_NVOLDIR    15      /* Number of volume directory files */
#define MIPS_VDIRSZ     8       /* File name size in volume directory */
#define MIPS_BFSIZE     16      /* Boot filename size */
#define MIPS_VHSECTOR   0       /* Sector number for MIPS volume header */

/*
 * Devices parameters that RISC/os uses for mapping logical block numbers
 * to physical device addresses.
 */
struct mips_devparams {
        uint8_t         dp_skew;        /* spiral addressing skew */
        uint8_t         dp_gap1;        /* words of 0 before header */
        uint8_t         dp_gap2;        /* words of 0 between hdr and data */
        uint8_t         dp_spare0;      /* spare space */
        uint16_t        dp_cyls;        /* number of cylinders */
        uint16_t        dp_shd0;        /* starting head vol 0 */
        uint16_t        dp_trks0;       /* number of tracks vol 0 */
        uint16_t        dp_shd1;        /* starting head vol 1 */
        uint16_t        dp_trks1;       /* number of tracks vol 1 */
        uint16_t        dp_secs;        /* number of sectors/track */
        uint16_t        dp_secbytes;    /* length of sector in bytes */
        uint16_t        dp_interleave;  /* sector interleave */
        int32_t         dp_flags;       /* controller characteristics */
        int32_t         dp_datarate;    /* bytes/sec for kernel stats */
        int32_t         dp_nretries;    /* max num retries on data error */
        int32_t         dp_spare1;      /* spare entries */
        int32_t         dp_spare2;
        int32_t         dp_spare3;
        int32_t         dp_spare4;
} __attribute__((__packed__));

/*
 * Volume directory is used as a shortcut to find bootstraps etc
 */
struct mips_voldir {                    /* Disk volume directory */
        char            vd_name[MIPS_VDIRSZ];
        int32_t         vd_lba;
        int32_t         vd_len;
};

struct mips_partitions {
        int32_t         pt_size;        /* # of logical blocks in partition */
        int32_t         pt_offset;      /* first logical block of partition */
        int32_t         pt_fstype;
};

/*
 * Mips RISC/os compatible volume header and partition table
 *
 * 1 sector (512 bytes) in size, and normally copied to the first sector
 * and cylinder of every track on a disk. 
 */
struct mips_volheader {
        uint32_t        vh_magic;
#define MIPS_VHMAGIC    0xbe5a941
        int16_t         vh_root;                /* Root partition number */
        int16_t         vh_swap;                /* Swap partition number */
        char            bootfile[MIPS_BFSIZE];  /* default file to boot */
        struct mips_devparams   vh_dp;          /* disk device parameters */
        struct mips_voldir      vh_voldir[MIPS_NVOLDIR];
        struct mips_partitions  vh_part[MIPS_PARTITIONS];
        int32_t         vh_cksum;
        int32_t         vh_pad;
} __attribute__((__packed__));

#define MIPS_FS_VOLHDR  0
#define MIPS_FS_TRKREPL 1
#define MIPS_FS_SECREPL 2
#define MIPS_FS_RAW     3
#define MIPS_FS_BSD     4
#define MIPS_FS_BSD42   4
#define MIPS_FS_SYSV    5
#define MIPS_FS_VOLUME  6 /* Entire volume */

/* Just a dummy */
struct cpu_disklabel {
        int     cd_dummy;                       /* must have one element. */
};

#endif /* _MACHINE_DISKLABEL_H_ */