FreeBSD/Linux Kernel Cross Reference
sys/scsi/rz_labels.h

     /* 
      * Mach Operating System
      * Copyright (c) 1991,1990,1989 Carnegie Mellon University
      * All Rights Reserved.
      * 
      * Permission to use, copy, modify and distribute this software and its
      * documentation is hereby granted, provided that both the copyright
      * notice and this permission notice appear in all copies of the
      * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    /*
     * HISTORY
     * $Log:        rz_labels.h,v $
     * Revision 2.11  93/01/14  17:55:34  danner
     *      Alpha labels.
     *      [92/12/01            af]
     * 
     * Revision 2.10  92/02/23  22:44:34  elf
     *      The vendor-label-searching function is now fixed.
     *      [92/02/22  19:03:13  af]
     * 
     * Revision 2.9  91/08/24  12:28:10  af
     *      More vendor's labels.
     *      [91/08/02  03:50:34  af]
     * 
     * Revision 2.8  91/07/09  23:22:43  danner
     *      Support for DEC, BSD, Omron labels.
     *      [91/07/09  11:15:23  danner]
     * 
     * Revision 2.7  91/06/19  11:57:09  rvb
     *      File moved here from mips/PMAX since it is now "MI" code, also
     *      used by Vax3100 and soon -- the omron luna88k.
     *      [91/06/04            rvb]
     * 
     * Revision 2.6  91/05/14  17:26:52  mrt
     *      Correcting copyright
     * 
     * Revision 2.5  91/05/13  06:04:35  af
     *      Moved BSD/OSF1 stuff elsewhere, and the copyright that goes with
     *      it.
     *      [91/05/03            af]
     * 
     * Revision 2.4  91/02/05  17:43:56  mrt
     *      Added author notices
     *      [91/02/04  11:17:04  mrt]
     * 
     *      Changed to use new Mach copyright
     *      [91/02/02  12:15:43  mrt]
     * 
     * Revision 2.3  90/12/05  23:34:02  af
     *      Added BSD/OSF1 labels and the copyright that goes with it.
     *      [90/11/26            af]
     * 
     * Revision 2.1.1.1  90/11/01  03:44:04  af
     *      Created.
     *      [90/10/22            af]
     */
    /*
     *      File: rz_labels.h
     *      Author: Alessandro Forin, Carnegie Mellon University
     *      Date:   10/90
     *
     *      Definitions of various vendor's disk label formats.
     */
    
    #ifndef _SCSI_RZ_LABELS_H_
    #define _SCSI_RZ_LABELS_H_
    
    /*
     * This function looks for, and converts to BSD format
     * a vendor's label.  It is only called if we did not
     * find a standard BSD label on the disk pack.
     */
    extern boolean_t        rz_vendor_label();
    
    /*
     * Definition of the DEC disk label,
     * which is located (you guessed it)
     * at the end of the 4.3 superblock.
     */
    
    struct dec_partition_info {
            unsigned int    n_sectors;      /* how big the partition is */
            unsigned int    offset;         /* sector no. of start of part. */
   };
   
   typedef struct {
           int     magic;
   #       define  DEC_LABEL_MAGIC         0x032957
           int     in_use;
           struct  dec_partition_info partitions[8];
   } scsi_dec_label_t;
   
   /*
    * Physical location on disk.
    * This is independent of the filesystem we use,
    * although of course we'll be in trouble if we
    * screwup the 4.3 SBLOCK..
    */
   
   #define DEC_LABEL_BYTE_OFFSET   ((2*8192)-sizeof(scsi_dec_label_t))
   
   
   /*
    * Definitions for the primary boot information
    * This is common, cuz the prom knows it.
    */
   
   typedef struct {
           int             pad[2];
           unsigned int    magic;
   #       define          DEC_BOOT0_MAGIC 0x2757a
           int             mode;
           unsigned int    phys_base;
           unsigned int    virt_base;
           unsigned int    n_sectors;
           unsigned int    start_sector;
   } scsi_dec_boot0_t;
   
   typedef struct {
           scsi_dec_boot0_t        vax_boot;
                                           /* BSD label still fits in pad */
           char                    pad[0x1e0-sizeof(scsi_dec_boot0_t)];
           unsigned long           block_count;
           unsigned long           starting_lbn;
           unsigned long           flags;
           unsigned long           checksum; /* add cmpl-2 all but here */
   } scsi_alpha_boot0_t;
   
   /*
    * Definition of the Omron disk label,
    * which is located at sector 0. It
    * _is_ sector 0, actually.
    */
   struct omron_partition_info {
           unsigned long   offset;
           unsigned long   n_sectors;
   };
   
   typedef struct {
           char            packname[128];  /* in ascii */
   
           char            pad[512-(128+8*8+11*2+4)];
   
           unsigned short  badchk; /* checksum of bad track */
           unsigned long   maxblk; /* # of total logical blocks */
           unsigned short  dtype;  /* disk drive type */
           unsigned short  ndisk;  /* # of disk drives */
           unsigned short  ncyl;   /* # of data cylinders */
           unsigned short  acyl;   /* # of alternate cylinders */
           unsigned short  nhead;  /* # of heads in this partition */
           unsigned short  nsect;  /* # of 512 byte sectors per track */
           unsigned short  bhead;  /* identifies proper label locations */
           unsigned short  ppart;  /* physical partition # */
           struct omron_partition_info
                           partitions[8];
   
           unsigned short  magic;  /* identifies this label format */
   #       define  OMRON_LABEL_MAGIC       0xdabe
   
           unsigned short  cksum;  /* xor checksum of sector */
   
   } scsi_omron_label_t;
   
   /*
    * Physical location on disk.
    */
   
   #define OMRON_LABEL_BYTE_OFFSET 0
   
   
   /*
    * Definition of the i386AT disk label, which lives inside sector 0.
    * This is the info the BIOS knows about, which we use for bootstrapping.
    * It is common across all disks known to BIOS, not just SCSI.
    */
   
   struct bios_partition_info {
   
           unsigned char   bootid; /* bootable or not */
   #       define BIOS_BOOTABLE    128
   
           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; /* filesystem type */
   #       define  UNIXOS          99
   
           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. */
   
           unsigned long   offset;
           unsigned long   n_sectors;
   };
   
   typedef struct {
   /*      struct bios_partition_info      bogus compiler alignes wrong
                           partitions[4];
   */
           char            partitions[4*sizeof(struct bios_partition_info)];
           unsigned short  magic;
   #       define  BIOS_LABEL_MAGIC        0xaa55
   } scsi_bios_label_t;
   
   /*
    * Physical location on disk.
    */
   
   #define BIOS_LABEL_BYTE_OFFSET  446
   
   /*
    * Definitions for the primary boot information
    * This _is_ block 0
    */
   
   #define BIOS_BOOT0_SIZE BIOS_LABEL_BYTE_OFFSET
   
   typedef struct {
           char            boot0[BIOS_BOOT0_SIZE]; /* boot code */
   /*      scsi_bios_label_t label;        bogus compiler alignes wrong */
           char            label[sizeof(scsi_bios_label_t)];
   } scsi_bios_boot0_t;
   
   
   #endif  _SCSI_RZ_LABELS_H_
   

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