1 /* 2 * (C) Copyright 2000 3 * Hans-Joerg Frieden, Hyperion Entertainment 4 * Hans-JoergF@hyperion-entertainment.com 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #ifndef _DISK_PART_AMIGA_H 10 #define _DISK_PART_AMIGA_H 11 #include <common.h> 12 13 #ifdef CONFIG_ISO_PARTITION 14 /* Make the buffers bigger if ISO partition support is enabled -- CD-ROMS 15 have 2048 byte blocks */ 16 #define DEFAULT_SECTOR_SIZE 2048 17 #else 18 #define DEFAULT_SECTOR_SIZE 512 19 #endif 20 21 22 #define AMIGA_BLOCK_LIMIT 16 23 24 /* 25 * Amiga disks have a very open structure. The head for the partition table information 26 * is stored somewhere within the first 16 blocks on disk, and is called the 27 * "RigidDiskBlock". 28 */ 29 30 struct rigid_disk_block 31 { 32 u32 id; 33 u32 summed_longs; 34 s32 chk_sum; 35 u32 host_id; 36 u32 block_bytes; 37 u32 flags; 38 u32 bad_block_list; 39 u32 partition_list; 40 u32 file_sys_header_list; 41 u32 drive_init; 42 u32 bootcode_block; 43 u32 reserved_1[5]; 44 45 /* Physical drive geometry */ 46 u32 cylinders; 47 u32 sectors; 48 u32 heads; 49 u32 interleave; 50 u32 park; 51 u32 reserved_2[3]; 52 u32 write_pre_comp; 53 u32 reduced_write; 54 u32 step_rate; 55 u32 reserved_3[5]; 56 57 /* logical drive geometry */ 58 u32 rdb_blocks_lo; 59 u32 rdb_blocks_hi; 60 u32 lo_cylinder; 61 u32 hi_cylinder; 62 u32 cyl_blocks; 63 u32 auto_park_seconds; 64 u32 high_rdsk_block; 65 u32 reserved_4; 66 67 char disk_vendor[8]; 68 char disk_product[16]; 69 char disk_revision[4]; 70 char controller_vendor[8]; 71 char controller_product[16]; 72 char controller_revision[4]; 73 74 u32 reserved_5[10]; 75 }; 76 77 /* 78 * Each partition on this drive is defined by such a block 79 */ 80 81 struct partition_block 82 { 83 u32 id; 84 u32 summed_longs; 85 s32 chk_sum; 86 u32 host_id; 87 u32 next; 88 u32 flags; 89 u32 reserved_1[2]; 90 u32 dev_flags; 91 char drive_name[32]; 92 u32 reserved_2[15]; 93 u32 environment[17]; 94 u32 reserved_3[15]; 95 }; 96 97 struct bootcode_block 98 { 99 u32 id; 100 u32 summed_longs; 101 s32 chk_sum; 102 u32 host_id; 103 u32 next; 104 u32 load_data[123]; 105 }; 106 107 108 #define AMIGA_ID_RDISK 0x5244534B 109 #define AMIGA_ID_PART 0x50415254 110 #define AMIGA_ID_BOOT 0x424f4f54 111 112 /* 113 * The environment array in the partition block 114 * describes the partition 115 */ 116 117 struct amiga_part_geometry 118 { 119 u32 table_size; 120 u32 size_blocks; 121 u32 unused1; 122 u32 surfaces; 123 u32 sector_per_block; 124 u32 block_per_track; 125 u32 reserved; 126 u32 prealloc; 127 u32 interleave; 128 u32 low_cyl; 129 u32 high_cyl; 130 u32 num_buffers; 131 u32 buf_mem_type; 132 u32 max_transfer; 133 u32 mask; 134 s32 boot_priority; 135 u32 dos_type; 136 u32 baud; 137 u32 control; 138 u32 boot_blocks; 139 }; 140 141 #endif /* _DISK_PART_AMIGA_H_ */ 142