disk/part_amiga.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * (C) Copyright 2000
   4  * Hans-Joerg Frieden, Hyperion Entertainment
   5  * Hans-JoergF@hyperion-entertainment.com
   6  */
   7
   8 #ifndef _DISK_PART_AMIGA_H
   9 #define _DISK_PART_AMIGA_H
  10 #include <common.h>
  11
  12 #if CONFIG_IS_ENABLED(ISO_PARTITION)
  13 /* Make the buffers bigger if ISO partition support is enabled -- CD-ROMS
  14    have 2048 byte blocks */
  15 #define DEFAULT_SECTOR_SIZE   2048
  16 #else
  17 #define DEFAULT_SECTOR_SIZE     512
  18 #endif
  19
  20
  21 #define AMIGA_BLOCK_LIMIT 16
  22
  23 /*
  24  * Amiga disks have a very open structure. The head for the partition table information
  25  * is stored somewhere within the first 16 blocks on disk, and is called the
  26  * "RigidDiskBlock".
  27  */
  28
  29 struct rigid_disk_block
  30 {
  31     u32 id;
  32     u32 summed_longs;
  33     s32 chk_sum;
  34     u32 host_id;
  35     u32 block_bytes;
  36     u32 flags;
  37     u32 bad_block_list;
  38     u32 partition_list;
  39     u32 file_sys_header_list;
  40     u32 drive_init;
  41     u32 bootcode_block;
  42     u32 reserved_1[5];
  43
  44     /* Physical drive geometry */
  45     u32 cylinders;
  46     u32 sectors;
  47     u32 heads;
  48     u32 interleave;
  49     u32 park;
  50     u32 reserved_2[3];
  51     u32 write_pre_comp;
  52     u32 reduced_write;
  53     u32 step_rate;
  54     u32 reserved_3[5];
  55
  56     /* logical drive geometry */
  57     u32 rdb_blocks_lo;
  58     u32 rdb_blocks_hi;
  59     u32 lo_cylinder;
  60     u32 hi_cylinder;
  61     u32 cyl_blocks;
  62     u32 auto_park_seconds;
  63     u32 high_rdsk_block;
  64     u32 reserved_4;
  65
  66     char disk_vendor[8];
  67     char disk_product[16];
  68     char disk_revision[4];
  69     char controller_vendor[8];
  70     char controller_product[16];
  71     char controller_revision[4];
  72
  73     u32 reserved_5[10];
  74 };
  75
  76 /*
  77  * Each partition on this drive is defined by such a block
  78  */
  79
  80 struct partition_block
  81 {
  82     u32 id;
  83     u32 summed_longs;
  84     s32 chk_sum;
  85     u32 host_id;
  86     u32 next;
  87     u32 flags;
  88     u32 reserved_1[2];
  89     u32 dev_flags;
  90     char drive_name[32];
  91     u32 reserved_2[15];
  92     u32 environment[17];
  93     u32 reserved_3[15];
  94 };
  95
  96 struct bootcode_block
  97 {
  98     u32   id;
  99     u32   summed_longs;
 100     s32   chk_sum;
 101     u32   host_id;
 102     u32   next;
 103     u32   load_data[123];
 104 };
 105
 106
 107 #define AMIGA_ID_RDISK                  0x5244534B
 108 #define AMIGA_ID_PART                   0x50415254
 109 #define AMIGA_ID_BOOT                   0x424f4f54
 110
 111 /*
 112  * The environment array in the partition block
 113  * describes the partition
 114  */
 115
 116 struct amiga_part_geometry
 117 {
 118     u32 table_size;
 119     u32 size_blocks;
 120     u32 unused1;
 121     u32 surfaces;
 122     u32 sector_per_block;
 123     u32 block_per_track;
 124     u32 reserved;
 125     u32 prealloc;
 126     u32 interleave;
 127     u32 low_cyl;
 128     u32 high_cyl;
 129     u32 num_buffers;
 130     u32 buf_mem_type;
 131     u32 max_transfer;
 132     u32 mask;
 133     s32 boot_priority;
 134     u32 dos_type;
 135     u32 baud;
 136     u32 control;
 137     u32 boot_blocks;
 138 };
 139
 140 #endif /* _DISK_PART_AMIGA_H_ */