LXR uboot/disk/part

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