/*
 * Copyright (c) 1987, 1988, 1993
 *      The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 *
 *      @(#)disklabel.h 8.2 (Berkeley) 7/10/94
 */

#ifndef _SYS_DISKMBR_H_
#define _SYS_DISKMBR_H_

#include <sys/types.h>

#define DOSBBSECTOR     0       /* DOS boot block relative sector number */
#define DOSPARTOFF      446
#define DOSPARTSIZE     16
#define NDOSPART        4
#define NEXTDOSPART     32
#define DOSMAGICOFF     510
#define DOSMAGIC        0xAA55

#define DOSPTYP_EXT     0x05    /* DOS extended partition */
#define DOSPTYP_EXTLBA  0x0F    /* DOS extended partition */
#define DOSPTYP_ONTRACK 0x54    /* Ontrack Disk Manager */
#define DOSPTYP_DFLYBSD 0x6C    /* DragonFly BSD partition type */
                                /* NOTE: DragonFly BSD had been using 0xA5
                                 * forever but after many years we're finally
                                 * shifting to our own as 0xA5 causes conflicts
                                 * in GRUB. */
#define DOSPTYP_LINSWP  0x82    /* Linux swap partition */
#define DOSPTYP_LINUX   0x83    /* Linux partition */
#define DOSPTYP_386BSD  0xA5    /* 386BSD partition type */
#define DOSPTYP_OPENBSD 0xA6    /* OpenBSD partition type */
#define DOSPTYP_NETBSD  0xA9    /* NetBSD partition type */
#define DOSPTYP_PMBR    0xEE    /* GPT Protective MBR */
#define DOSPTYP_EFI     0xEF    /* EFI system partition */

#ifndef _STANDALONE
static const struct dos_ptype
{
        unsigned char type;
        const char *name;
} dos_ptypes[] = {
        { 0x00, "unused" },
        { 0x01, "Primary DOS with 12 bit FAT" },
        { 0x02, "XENIX / filesystem" },
        { 0x03, "XENIX /usr filesystem" },
        { 0x04, "Primary DOS with 16 bit FAT (<= 32MB)" },
        { DOSPTYP_EXT, "Extended DOS" },
        { 0x06, "Primary 'big' DOS (> 32MB)" },
        { 0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX" },
        { 0x08, "AIX filesystem" },
        { 0x09, "AIX boot partition or Coherent" },
        { 0x0A, "OS/2 Boot Manager or OPUS" },
        { 0x0B, "DOS or Windows 95 with 32 bit FAT" },
        { 0x0C, "DOS or Windows 95 with 32 bit FAT, LBA" },
        { 0x0E, "Primary 'big' DOS (> 32MB, LBA)" },
        { DOSPTYP_EXTLBA, "Extended DOS, LBA" },
        { 0x10, "OPUS" },
        { 0x11, "OS/2 BM: hidden DOS with 12-bit FAT" },
        { 0x12, "Compaq diagnostics" },
        { 0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)" },
        { 0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)" },
        { 0x17, "OS/2 BM: hidden IFS (e.g. HPFS)" },
        { 0x18, "AST Windows swapfile" },
        { 0x24, "NEC DOS" },
        { 0x39, "plan9" },
        { 0x3C, "PartitionMagic recovery" },
        { 0x40, "VENIX 286" },
        { 0x41, "Linux/MINIX (sharing disk with DRDOS)" },
        { 0x42, "SFS or Linux swap (sharing disk with DRDOS)" },
        { 0x43, "Linux native (sharing disk with DRDOS)" },
        { 0x4D, "QNX 4.2 Primary" },
        { 0x4E, "QNX 4.2 Secondary" },
        { 0x4F, "QNX 4.2 Tertiary" },
        { 0x50, "DM" },
        { 0x51, "DM" },
        { 0x52, "CP/M or Microport SysV/AT" },
        { 0x53, "DM6 Aux3" },
        { DOSPTYP_ONTRACK, "DM6" },
        { 0x55, "EZ-Drive (disk manager)" },
        { 0x56, "GB" },
        { 0x5C, "Priam Edisk (disk manager)" }, /* according to S. Widlake */
        { 0x61, "Speed" },
        { 0x63, "ISC UNIX, other System V/386, GNU HURD or Mach" },
        { 0x64, "Novell Netware 2.xx" },
        { 0x65, "Novell Netware 3.xx" },
        { DOSPTYP_DFLYBSD, "DragonFly BSD" },
        { 0x70, "DiskSecure Multi-Boot" },
        { 0x75, "PCIX" },
        { 0x77, "QNX4.x" },
        { 0x78, "QNX4.x 2nd part" },
        { 0x79, "QNX4.x 3rd part" },
        { 0x80, "Minix 1.1 ... 1.4a" },
        { 0x81, "Minix 1.4b ... 1.5.10" },
        { DOSPTYP_LINSWP, "Linux swap or Solaris x86" },
        { DOSPTYP_LINUX, "Linux filesystem" },
        { 0x84, "OS/2 hidden C: drive" },
        { 0x85, "Linux extended" },
        { 0x86, "NTFS volume set??" },
        { 0x87, "NTFS volume set??" },
        { 0x93, "Amoeba filesystem" },
        { 0x94, "Amoeba bad block table" },
        { 0x9F, "BSD/OS" },
        { 0xA0, "Suspend to Disk" },
        { DOSPTYP_386BSD, "DragonFly/FreeBSD/NetBSD/386BSD" },
        { DOSPTYP_OPENBSD, "OpenBSD" },
        { 0xA7, "NEXTSTEP" },
        { DOSPTYP_NETBSD, "NetBSD" },
        { 0xAC, "IBM JFS" },
        { 0xB7, "BSDI BSD/386 filesystem" },
        { 0xB8, "BSDI BSD/386 swap" },
        { 0xBE, "Solaris x86 boot" },
        { 0xC1, "DRDOS/sec with 12-bit FAT" },
        { 0xC4, "DRDOS/sec with 16-bit FAT (< 32MB)" },
        { 0xC6, "DRDOS/sec with 16-bit FAT (>= 32MB)" },
        { 0xC7, "Syrinx" },
        { 0xDB, "Concurrent CPM or C.DOS or CTOS" },
        { 0xE1, "Speed" },
        { 0xE3, "Speed" },
        { 0xE4, "Speed" },
        { 0xEB, "BeOS file system" },
        { DOSPTYP_PMBR, "EFI GPT" },
        { DOSPTYP_EFI, "EFI System Partition" },
        { 0xF1, "Speed" },
        { 0xF2, "DOS 3.3+ Secondary" },
        { 0xF4, "Speed" },
        { 0xFE, "SpeedStor >1024 cyl. or LANstep" },
        { 0xFF, "BBT (Bad Blocks Table)" }
};
#endif /* !_STANDALONE */

/*
 * Note that sector numbers in a legacy MBR DOS partition start at 1 instead
 * of 0, so the first sector of the disk would be cyl 0, head 0, sector 1
 * and translate to block 0 in the actual disk I/O.
 */
struct dos_partition {
        unsigned char   dp_flag;        /* bootstrap flags */
        unsigned char   dp_shd;         /* starting head */
        unsigned char   dp_ssect;       /* starting sector */
        unsigned char   dp_scyl;        /* starting cylinder */
        unsigned char   dp_typ;         /* partition type */
        unsigned char   dp_ehd;         /* end head */
        unsigned char   dp_esect;       /* end sector */
        unsigned char   dp_ecyl;        /* end cylinder */
        uint32_t        dp_start;       /* absolute starting sector number */
        uint32_t        dp_size;        /* partition size in sectors */
};

#ifndef CTASSERT
#define CTASSERT(x)             _CTASSERT(x, __LINE__)
#define _CTASSERT(x, y)         __CTASSERT(x, y)
#define __CTASSERT(x, y)        typedef char __assert_ ## y [(x) ? 1 : -1]
#endif

CTASSERT(sizeof (struct dos_partition) == DOSPARTSIZE);

#define DPSECT(s) ((s) & 0x3f)          /* isolate relevant bits of sector */
#define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */

#endif /* !_SYS_DISKMBR_H_ */