disk/part_dos.h

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #ifndef _DISK_PART_DOS_H
  25 #define _DISK_PART_DOS_H
  26
  27
  28 #ifdef CONFIG_ISO_PARTITION
  29 /* Make the buffers bigger if ISO partition support is enabled -- CD-ROMS
  30    have 2048 byte blocks */
  31 #define DEFAULT_SECTOR_SIZE   2048
  32 #else
  33 #define DEFAULT_SECTOR_SIZE     512
  34 #endif
  35 #define DOS_PART_TBL_OFFSET     0x1be
  36 #define DOS_PART_MAGIC_OFFSET   0x1fe
  37 #define DOS_PBR_FSTYPE_OFFSET   0x36
  38 #define DOS_PBR_MEDIA_TYPE_OFFSET       0x15
  39 #define DOS_MBR 0
  40 #define DOS_PBR 1
  41
  42 typedef struct dos_partition {
  43         unsigned char boot_ind;         /* 0x80 - active                        */
  44         unsigned char head;             /* starting head                        */
  45         unsigned char sector;           /* starting sector                      */
  46         unsigned char cyl;              /* starting cylinder                    */
  47         unsigned char sys_ind;          /* What partition type                  */
  48         unsigned char end_head;         /* end head                             */
  49         unsigned char end_sector;       /* end sector                           */
  50         unsigned char end_cyl;          /* end cylinder                         */
  51         unsigned char start4[4];        /* starting sector counting from 0      */
  52         unsigned char size4[4];         /* nr of sectors in partition           */
  53 } dos_partition_t;
  54
  55 #endif  /* _DISK_PART_DOS_H */