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Annotation of Gnu-Mach/i386/i386at/disk.h, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  * 
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  * 
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  * 
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  * 
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  * 
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: /*
        !            27:   Copyright 1988, 1989 by Intel Corporation, Santa Clara, California.
        !            28: 
        !            29:                All Rights Reserved
        !            30: 
        !            31: Permission to use, copy, modify, and distribute this software and
        !            32: its documentation for any purpose and without fee is hereby
        !            33: granted, provided that the above copyright notice appears in all
        !            34: copies and that both the copyright notice and this permission notice
        !            35: appear in supporting documentation, and that the name of Intel
        !            36: not be used in advertising or publicity pertaining to distribution
        !            37: of the software without specific, written prior permission.
        !            38: 
        !            39: INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
        !            40: INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
        !            41: IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
        !            42: CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
        !            43: LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
        !            44: NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
        !            45: WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            46: */
        !            47: 
        !            48: /*
        !            49:  * disk.h
        !            50:  */
        !            51: 
        !            52: /* Grab the public part.  */
        !            53: #include <mach/machine/disk.h>
        !            54: 
        !            55: 
        !            56: 
        !            57: #define MAX_ALTENTS     253            /* Maximum # of slots for alts */
        !            58:                                        /* allowed for in the table. */
        !            59: 
        !            60: #define ALT_SANITY      0xdeadbeef      /* magic # to validate alt table */
        !            61: 
        !            62: struct  alt_table {
        !            63:        u_short alt_used;               /* # of alternates already assigned */
        !            64:        u_short alt_reserved;           /* # of alternates reserved on disk */
        !            65:        long    alt_base;               /* 1st sector (abs) of the alt area */
        !            66:        long    alt_bad[MAX_ALTENTS];   /* list of bad sectors/tracks   */
        !            67: };
        !            68: 
        !            69: struct alt_info {                      /* table length should be multiple of 512 */
        !            70:        long    alt_sanity;             /* to validate correctness */
        !            71:        u_short alt_version;            /* to corroborate vintage */
        !            72:        u_short alt_pad;                /* padding for alignment */
        !            73:        struct alt_table alt_trk;       /* bad track table */
        !            74:        struct alt_table alt_sec;       /* bad sector table */
        !            75: };
        !            76: typedef struct alt_info altinfo_t;
        !            77: 
        !            78: #define V_NUMPAR        16              /* maximum number of partitions */
        !            79: 
        !            80: #define VTOC_SANE       0x600DDEEE      /* Indicates a sane VTOC */
        !            81: #define PDLOCATION     29              /* location of VTOC */
        !            82: 
        !            83: #define BAD_BLK         0x80                    /* needed for V_VERIFY */
        !            84: /* BAD_BLK moved from old hdreg.h */
        !            85: 
        !            86: 
        !            87: #define        HDPDLOC         29              /* location of pdinfo/vtoc */
        !            88: #define        LBLLOC          1               /* label block for xxxbsd */
        !            89: 
        !            90: /* Partition permission flags */
        !            91: #define V_OPEN          0x100           /* Partition open (for driver use) */
        !            92: #define V_VALID         0x200           /* Partition is valid to use */
        !            93: 
        !            94: 
        !            95: 
        !            96: /* Sanity word for the physical description area */
        !            97: #define VALID_PD               0xCA5E600D
        !            98: 
        !            99: struct localpartition  {
        !           100:        u_int   p_flag;                 /*permision flags*/
        !           101:        long    p_start;                /*physical start sector no of partition*/
        !           102:        long    p_size;                 /*# of physical sectors in partition*/
        !           103: };
        !           104: typedef struct localpartition localpartition_t;
        !           105: 
        !           106: struct evtoc {
        !           107:        u_int   fill0[6];
        !           108:        u_int   cyls;                   /*number of cylinders per drive*/
        !           109:        u_int   tracks;                 /*number tracks per cylinder*/
        !           110:        u_int   sectors;                /*number sectors per track*/
        !           111:        u_int   fill1[13];
        !           112:        u_int   version;                /*layout version*/
        !           113:        u_int   alt_ptr;                /*byte offset of alternates table*/
        !           114:        u_short alt_len;                /*byte length of alternates table*/
        !           115:        u_int   sanity;                 /*to verify vtoc sanity*/
        !           116:        u_int   xcyls;                  /*number of cylinders per drive*/
        !           117:        u_int   xtracks;                /*number tracks per cylinder*/
        !           118:        u_int   xsectors;               /*number sectors per track*/
        !           119:        u_short nparts;                 /*number of partitions*/
        !           120:        u_short fill2;                  /*pad for 286 compiler*/
        !           121:        char    label[40];
        !           122:        struct localpartition part[V_NUMPAR];/*partition headers*/
        !           123:        char    fill[512-352];
        !           124: };
        !           125: 
        !           126: union   io_arg {
        !           127:        struct  {
        !           128:                u_short ncyl;           /* number of cylinders on drive */
        !           129:                u_char  nhead;          /* number of heads/cyl */
        !           130:                u_char  nsec;           /* number of sectors/track */
        !           131:                u_short secsiz;         /* number of bytes/sector */
        !           132:                } ia_cd;                /* used for Configure Drive cmd */
        !           133:        struct  {
        !           134:                u_short flags;          /* flags (see below) */
        !           135:                long    bad_sector;     /* absolute sector number */
        !           136:                long    new_sector;     /* RETURNED alternate sect assigned */
        !           137:                } ia_abs;               /* used for Add Bad Sector cmd */
        !           138:        struct  {
        !           139:                u_short start_trk;      /* first track # */
        !           140:                u_short num_trks;       /* number of tracks to format */
        !           141:                u_short intlv;          /* interleave factor */
        !           142:                } ia_fmt;               /* used for Format Tracks cmd */
        !           143:        struct  {
        !           144:                u_short start_trk;      /* first track  */
        !           145:                char    *intlv_tbl;     /* interleave table */
        !           146:                } ia_xfmt;              /* used for the V_XFORMAT ioctl */
        !           147: };
        !           148: 
        !           149: 
        !           150: #define BOOTSZ         446             /* size of boot code in master boot block */
        !           151: #define FD_NUMPART     4               /* number of 'partitions' in fdisk table */
        !           152: #define ACTIVE         128             /* indicator of active partition */
        !           153: #define        BOOT_MAGIC      0xAA55          /* signature of the boot record */
        !           154: #define        UNIXOS          99              /* UNIX partition */
        !           155: #define BSDOS          165
        !           156: #define LINUXSWAP      130
        !           157: #define LINUXOS                131
        !           158: extern int             OS;             /* what partition we came from */
        !           159: 
        !           160: /*
        !           161:  * structure to hold the fdisk partition table
        !           162:  */
        !           163: struct ipart {
        !           164:        u_char  bootid;                 /* bootable or not */
        !           165:        u_char  beghead;                /* beginning head, sector, cylinder */
        !           166:        u_char  begsect;                /* begcyl is a 10-bit number. High 2 bits */
        !           167:        u_char  begcyl;                 /*     are in begsect. */
        !           168:        u_char  systid;                 /* OS type */
        !           169:        u_char  endhead;                /* ending head, sector, cylinder */
        !           170:        u_char  endsect;                /* endcyl is a 10-bit number.  High 2 bits */
        !           171:        u_char  endcyl;                 /*     are in endsect. */
        !           172:        long    relsect;                /* first sector relative to start of disk */
        !           173:        long    numsect;                /* number of sectors in partition */
        !           174: };
        !           175: 
        !           176: /*
        !           177:  * structure to hold master boot block in physical sector 0 of the disk.
        !           178:  * Note that partitions stuff can't be directly included in the structure
        !           179:  * because of lameo '386 compiler alignment design.
        !           180:  */
        !           181: struct  mboot {                                     /* master boot block */
        !           182:        char    bootinst[BOOTSZ];
        !           183:        char    parts[FD_NUMPART * sizeof(struct ipart)];
        !           184:        u_short signature;
        !           185: };
        !           186: 

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