disk/part_amiga.h

   1 /*
   2  * (C) Copyright 2000
   3  * Hans-Joerg Frieden, Hyperion Entertainment
   4  * Hans-JoergF@hyperion-entertainment.com
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #ifndef _DISK_PART_AMIGA_H
  26 #define _DISK_PART_AMIGA_H
  27 #include <common.h>
  28
  29 #ifdef CONFIG_ISO_PARTITION
  30 /* Make the buffers bigger if ISO partition support is enabled -- CD-ROMS
  31    have 2048 byte blocks */
  32 #define DEFAULT_SECTOR_SIZE   2048
  33 #else
  34 #define DEFAULT_SECTOR_SIZE     512
  35 #endif
  36
  37
  38 #define AMIGA_BLOCK_LIMIT 16
  39
  40 /*
  41  * Amiga disks have a very open structure. The head for the partition table information
  42  * is stored somewhere within the first 16 blocks on disk, and is called the
  43  * "RigidDiskBlock".
  44  */
  45
  46 struct rigid_disk_block
  47 {
  48     u32 id;
  49     u32 summed_longs;
  50     s32 chk_sum;
  51     u32 host_id;
  52     u32 block_bytes;
  53     u32 flags;
  54     u32 bad_block_list;
  55     u32 partition_list;
  56     u32 file_sys_header_list;
  57     u32 drive_init;
  58     u32 bootcode_block;
  59     u32 reserved_1[5];
  60
  61     /* Physical drive geometry */
  62     u32 cylinders;
  63     u32 sectors;
  64     u32 heads;
  65     u32 interleave;
  66     u32 park;
  67     u32 reserved_2[3];
  68     u32 write_pre_comp;
  69     u32 reduced_write;
  70     u32 step_rate;
  71     u32 reserved_3[5];
  72
  73     /* logical drive geometry */
  74     u32 rdb_blocks_lo;
  75     u32 rdb_blocks_hi;
  76     u32 lo_cylinder;
  77     u32 hi_cylinder;
  78     u32 cyl_blocks;
  79     u32 auto_park_seconds;
  80     u32 high_rdsk_block;
  81     u32 reserved_4;
  82
  83     char disk_vendor[8];
  84     char disk_product[16];
  85     char disk_revision[4];
  86     char controller_vendor[8];
  87     char controller_product[16];
  88     char controller_revision[4];
  89
  90     u32 reserved_5[10];
  91 };
  92
  93 /*
  94  * Each partition on this drive is defined by such a block
  95  */
  96
  97 struct partition_block
  98 {
  99     u32 id;
 100     u32 summed_longs;
 101     s32 chk_sum;
 102     u32 host_id;
 103     u32 next;
 104     u32 flags;
 105     u32 reserved_1[2];
 106     u32 dev_flags;
 107     char drive_name[32];
 108     u32 reserved_2[15];
 109     u32 environment[17];
 110     u32 reserved_3[15];
 111 };
 112
 113 struct bootcode_block
 114 {
 115     u32   id;
 116     u32   summed_longs;
 117     s32   chk_sum;
 118     u32   host_id;
 119     u32   next;
 120     u32   load_data[123];
 121 };
 122
 123
 124 #define AMIGA_ID_RDISK                  0x5244534B
 125 #define AMIGA_ID_PART                   0x50415254
 126 #define AMIGA_ID_BOOT                   0x424f4f54
 127
 128 /*
 129  * The environment array in the partition block
 130  * describes the partition
 131  */
 132
 133 struct amiga_part_geometry
 134 {
 135     u32 table_size;
 136     u32 size_blocks;
 137     u32 unused1;
 138     u32 surfaces;
 139     u32 sector_per_block;
 140     u32 block_per_track;
 141     u32 reserved;
 142     u32 prealloc;
 143     u32 interleave;
 144     u32 low_cyl;
 145     u32 high_cyl;
 146     u32 num_buffers;
 147     u32 buf_mem_type;
 148     u32 max_transfer;
 149     u32 mask;
 150     s32 boot_priority;
 151     u32 dos_type;
 152     u32 baud;
 153     u32 control;
 154     u32 boot_blocks;
 155 };
 156
 157 #endif /* _DISK_PART_AMIGA_H_ */