FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/lib/libspl/include/sys/dktp/fdisk.h

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License (the "License").
      * You may not use this file except in compliance with the License.
      *
      * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      * or https://opensource.org/licenses/CDDL-1.0.
     * See the License for the specific language governing permissions
     * and limitations under the License.
     *
     * When distributing Covered Code, include this CDDL HEADER in each
     * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     * If applicable, add the following below this CDDL HEADER, with the
     * fields enclosed by brackets "[]" replaced with your own identifying
     * information: Portions Copyright [yyyy] [name of copyright owner]
     *
     * CDDL HEADER END
     */
    
    /*
     * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     * Use is subject to license terms.
     */
    /*      Copyright (c) 1984, 1986, 1987, 1988 AT&T       */
    /*        All Rights Reserved   */
    
    
    #ifndef _SYS_DKTP_FDISK_H
    #define _SYS_DKTP_FDISK_H
    
    #ifdef  __cplusplus
    extern "C" {
    #endif
    
    /*
     * fdisk.h
     * This file defines the structure of physical disk sector 0 for use on
     * AT386 systems.  The format of this sector is constrained by the ROM
     * BIOS and MS-DOS conventions.
     * Note that this block does not define the partitions used by the unix
     * driver.  The unix partitions are obtained from the VTOC.
     */
    
    /*
     * the MAX values are the maximum usable values for BIOS chs values
     * The MAX_CYL value of 1022 is the maximum usable value
     *   the value of 1023 is a fence value,
     *   indicating no CHS geometry exists for the corresponding LBA value.
     * HEAD range [ 0 .. MAX_HEAD ], so number of heads is (MAX_HEAD + 1)
     * SECT range [ 1 .. MAX_SECT ], so number of sectors is (MAX_SECT)
     */
    #define MAX_SECT        (63)
    #define MAX_CYL         (1022)
    #define MAX_HEAD        (254)
    
    /*
     * BOOTSZ was reduced from 446 to 440 bytes to NOT overwrite the Windows
     * Vista DISKID. Otherwise Vista won't boot from Solaris GRUB in a dual-boot
     * setup.
     * The actual size of mboot code is 425 bytes while that of GRUB stage1 is
     * 423 bytes. So this changes does not harm them.
     */
    #define BOOTSZ          440     /* size of boot code in master boot block */
    #define FD_NUMPART      4       /* number of 'partitions' in fdisk table */
    #define MBB_MAGIC       0xAA55  /* magic number for mboot.signature */
    #define DEFAULT_INTLV   4       /* default interleave for testing tracks */
    #define MINPSIZE        4       /* minimum number of cylinders in a partition */
    #define TSTPAT          0xE5    /* test pattern for verifying disk */
    
    /*
     * structure to hold the fdisk partition table
     */
    struct ipart {
            unsigned char bootid;   /* bootable or not */
            unsigned char beghead;  /* beginning head, sector, cylinder */
            unsigned char begsect;  /* begcyl is a 10-bit number. High 2 bits */
            unsigned char begcyl;   /*      are in begsect. */
            unsigned char systid;   /* OS type */
            unsigned char endhead;  /* ending head, sector, cylinder */
            unsigned char endsect;  /* endcyl is a 10-bit number.  High 2 bits */
            unsigned char endcyl;   /*      are in endsect. */
            uint32_t relsect;       /* first sector relative to start of disk */
            uint32_t numsect;       /* number of sectors in partition */
    };
    /*
     * Values for bootid.
     */
    #define NOTACTIVE       0
    #define ACTIVE          128
    /*
     * Values for systid.
     */
    #define UNUSED          0       /* Empty Partition */
    #define DOSOS12         1       /* DOS partition, 12-bit FAT */
    #define PCIXOS          2       /* PC/IX partition */
    #define DOSOS16         4       /* DOS partition, 16-bit FAT */
    #define EXTDOS          5       /* EXT-DOS partition */
   #define DOSHUGE         6       /* Huge DOS partition  > 32MB */
   #define FDISK_IFS       7       /* Installable File System (IFS): HPFS & NTFS */
   #define FDISK_AIXBOOT   8       /* AIX Boot */
   #define FDISK_AIXDATA   9       /* AIX Data */
   #define FDISK_OS2BOOT   10      /* OS/2 Boot Manager */
   #define FDISK_WINDOWS   11      /* Windows 95 FAT32 (up to 2047GB) */
   #define FDISK_EXT_WIN   12      /* Windows 95 FAT32 (extended-INT13) */
   #define FDISK_FAT95     14      /* DOS 16-bit FAT, LBA-mapped */
   #define FDISK_EXTLBA    15      /* Extended partition, LBA-mapped */
   #define DIAGPART        18      /* Diagnostic boot partition (OS independent) */
   #define FDISK_LINUX     65      /* Linux */
   #define FDISK_LINUXDSWAP        66      /* Linux swap (sharing disk w/ DRDOS) */
   #define FDISK_LINUXDNAT 67      /* Linux native (sharing disk with DRDOS) */
   #define FDISK_CPM       82      /* CP/M */
   #define DOSDATA         86      /* DOS data partition */
   #define OTHEROS         98      /* part. type for appl. (DB?) needs */
                                   /* raw partition.  ID was 0 but conflicted */
                                   /* with DOS 3.3 fdisk    */
   #define UNIXOS          99      /* UNIX V.x partition */
   #define FDISK_NOVELL2   100     /* Novell Netware 286 */
   #define FDISK_NOVELL3   101     /* Novell Netware 3.x and later */
   #define FDISK_QNX4      119     /* QNX 4.x */
   #define FDISK_QNX42     120     /* QNX 4.x 2nd part */
   #define FDISK_QNX43     121     /* QNX 4.x 3rd part */
   #define SUNIXOS         130     /* Solaris UNIX partition */
   #define FDISK_LINUXNAT  131     /* Linux native */
   #define FDISK_NTFSVOL1  134     /* NTFS volume set 1 */
   #define FDISK_NTFSVOL2  135     /* NTFS volume set 2 */
   #define FDISK_BSD       165     /* BSD/386, 386BSD, NetBSD, FreeBSD, OpenBSD */
   #define FDISK_NEXTSTEP  167     /* NeXTSTEP */
   #define FDISK_BSDIFS    183     /* BSDI file system */
   #define FDISK_BSDISWAP  184     /* BSDI swap */
   #define X86BOOT         190     /* x86 Solaris boot partition */
   #define SUNIXOS2        191     /* Solaris UNIX partition */
   #define EFI_PMBR        238     /* EFI PMBR */
   #define EFI_FS          239     /* EFI File System (System Partition) */
   #define MAXDOS          65535L  /* max size (sectors) for DOS partition */
   
   /*
    * structure to hold master boot block in physical sector 0 of the disk.
    * Note that partitions stuff can't be directly included in the structure
    * because of lameo '386 compiler alignment design.
    * Alignment issues also force us to have 2 16bit entities for a single
    * 32bit win_volserno. It is not used anywhere anyway.
    */
   
   struct mboot {  /* master boot block */
           char    bootinst[BOOTSZ];
           uint16_t win_volserno_lo;
           uint16_t win_volserno_hi;
           uint16_t reserved;
           char    parts[FD_NUMPART * sizeof (struct ipart)];
           ushort_t signature;
   };
   
   #if defined(__i386) || defined(__amd64)
   
   /* Byte offset of the start of the partition table within the sector */
   #define FDISK_PART_TABLE_START  446
   
   /* Maximum number of valid partitions assumed as 32 */
   #define MAX_EXT_PARTS   32
   
   #else
   
   #define MAX_EXT_PARTS   0
   
   #endif  /* if defined(__i386) || defined(__amd64) */
   
   #ifdef  __cplusplus
   }
   #endif
   
   #endif  /* _SYS_DKTP_FDISK_H */

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