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git.ipfire.org Git - u-boot.git/blob - disk/part_amiga.c
3 * Hans-Joerg Frieden, Hyperion Entertainment
4 * Hans-JoergF@hyperion-entertainment.com
6 * SPDX-License-Identifier: GPL-2.0+
11 #include "part_amiga.h"
13 #ifdef HAVE_BLOCK_DEVICE
18 #define PRINTF(fmt, args...) printf(fmt ,##args)
20 #define PRINTF(fmt, args...)
30 static unsigned char block_buffer
[DEFAULT_SECTOR_SIZE
];
31 static struct rigid_disk_block rdb
= {0};
32 static struct bootcode_block bootcode
= {0};
35 * Copy a bcpl to a c string
37 static void bcpl_strcpy(char *to
, char *from
)
50 * Print a BCPL String. BCPL strings start with a byte with the length
51 * of the string, and don't contain a terminating nul character
53 static void bstr_print(char *string
)
62 buffer
[i
++] = *string
++;
67 printf("%-10s", buffer
);
71 * Sum a block. The checksum of a block must end up at zero
72 * to be valid. The chk_sum field is selected so that adding
75 int sum_block(struct block_header
*header
)
77 s32
*block
= (s32
*)header
;
81 for (i
= 0; i
< header
->summed_longs
; i
++)
88 * Print an AmigaOS disk type. Disk types are a four-byte identifier
89 * describing the file system. They are usually written as a three-letter
90 * word followed by a backslash and a version number. For example,
91 * DOS\0 would be the original file system. SFS\0 would be SmartFileSystem.
94 static void print_disk_type(u32 disk_type
)
97 buffer
[0] = (disk_type
& 0xFF000000)>>24;
98 buffer
[1] = (disk_type
& 0x00FF0000)>>16;
99 buffer
[2] = (disk_type
& 0x0000FF00)>>8;
101 buffer
[4] = (disk_type
& 0x000000FF) + '0';
103 printf("%s", buffer
);
107 * Print the info contained within the given partition block
109 static void print_part_info(struct partition_block
*p
)
111 struct amiga_part_geometry
*g
;
113 g
= (struct amiga_part_geometry
*)&(p
->environment
);
115 bstr_print(p
->drive_name
);
117 g
->low_cyl
* g
->block_per_track
* g
->surfaces
,
118 (g
->high_cyl
- g
->low_cyl
+ 1) * g
->block_per_track
* g
->surfaces
- 1);
119 print_disk_type(g
->dos_type
);
120 printf("\t%5d\n", g
->boot_priority
);
124 * Search for the Rigid Disk Block. The rigid disk block is required
125 * to be within the first 16 blocks of a drive, needs to have
126 * the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid
127 * sum-to-zero checksum
129 struct rigid_disk_block
*get_rdisk(block_dev_desc_t
*dev_desc
)
135 s
= getenv("amiga_scanlimit");
137 limit
= simple_strtoul(s
, NULL
, 10);
139 limit
= AMIGA_BLOCK_LIMIT
;
141 for (i
=0; i
<limit
; i
++)
143 ulong res
= dev_desc
->block_read(dev_desc
->dev
, i
, 1,
144 (ulong
*)block_buffer
);
147 struct rigid_disk_block
*trdb
= (struct rigid_disk_block
*)block_buffer
;
148 if (trdb
->id
== AMIGA_ID_RDISK
)
150 PRINTF("Rigid disk block suspect at %d, checking checksum\n",i
);
151 if (sum_block((struct block_header
*)block_buffer
) == 0)
154 memcpy(&rdb
, trdb
, sizeof(struct rigid_disk_block
));
155 return (struct rigid_disk_block
*)&rdb
;
160 PRINTF("Done scanning, no RDB found\n");
165 * Search for boot code
166 * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the
170 struct bootcode_block
*get_bootcode(block_dev_desc_t
*dev_desc
)
176 s
= getenv("amiga_scanlimit");
178 limit
= simple_strtoul(s
, NULL
, 10);
180 limit
= AMIGA_BLOCK_LIMIT
;
182 PRINTF("Scanning for BOOT from 0 to %d\n", limit
);
184 for (i
= 0; i
< limit
; i
++)
186 ulong res
= dev_desc
->block_read(dev_desc
->dev
, i
, 1, (ulong
*)block_buffer
);
189 struct bootcode_block
*boot
= (struct bootcode_block
*)block_buffer
;
190 if (boot
->id
== AMIGA_ID_BOOT
)
192 PRINTF("BOOT block at %d, checking checksum\n", i
);
193 if (sum_block((struct block_header
*)block_buffer
) == 0)
195 PRINTF("Found valid bootcode block\n");
196 memcpy(&bootcode
, boot
, sizeof(struct bootcode_block
));
203 PRINTF("No boot code found on disk\n");
208 * Test if the given partition has an Amiga partition table/Rigid
211 int test_part_amiga(block_dev_desc_t
*dev_desc
)
213 struct rigid_disk_block
*rdb
;
214 struct bootcode_block
*bootcode
;
216 PRINTF("test_part_amiga: Testing for an Amiga RDB partition\n");
218 rdb
= get_rdisk(dev_desc
);
221 bootcode
= get_bootcode(dev_desc
);
223 PRINTF("test_part_amiga: bootable Amiga disk\n");
225 PRINTF("test_part_amiga: non-bootable Amiga disk\n");
231 PRINTF("test_part_amiga: no RDB found\n");
238 * Find partition number partnum on the given drive.
240 static struct partition_block
*find_partition(block_dev_desc_t
*dev_desc
, int partnum
)
242 struct rigid_disk_block
*rdb
;
243 struct partition_block
*p
;
246 PRINTF("Trying to find partition block %d\n", partnum
);
247 rdb
= get_rdisk(dev_desc
);
250 PRINTF("find_partition: no rdb found\n");
254 PRINTF("find_partition: Scanning partition list\n");
256 block
= rdb
->partition_list
;
257 PRINTF("find_partition: partition list at 0x%x\n", block
);
259 while (block
!= 0xFFFFFFFF)
261 ulong res
= dev_desc
->block_read(dev_desc
->dev
, block
, 1,
262 (ulong
*)block_buffer
);
265 p
= (struct partition_block
*)block_buffer
;
266 if (p
->id
== AMIGA_ID_PART
)
268 PRINTF("PART block suspect at 0x%x, checking checksum\n",block
);
269 if (sum_block((struct block_header
*)p
) == 0)
271 if (partnum
== 0) break;
278 } else block
= 0xFFFFFFFF;
279 } else block
= 0xFFFFFFFF;
282 if (block
== 0xFFFFFFFF)
284 PRINTF("PART block not found\n");
288 return (struct partition_block
*)block_buffer
;
292 * Get info about a partition
294 int get_partition_info_amiga (block_dev_desc_t
*dev_desc
, int part
, disk_partition_t
*info
)
296 struct partition_block
*p
= find_partition(dev_desc
, part
-1);
297 struct amiga_part_geometry
*g
;
302 g
= (struct amiga_part_geometry
*)&(p
->environment
);
303 info
->start
= g
->low_cyl
* g
->block_per_track
* g
->surfaces
;
304 info
->size
= (g
->high_cyl
- g
->low_cyl
+ 1) * g
->block_per_track
* g
->surfaces
- 1;
305 info
->blksz
= rdb
.block_bytes
;
306 bcpl_strcpy(info
->name
, p
->drive_name
);
309 disk_type
= g
->dos_type
;
311 info
->type
[0] = (disk_type
& 0xFF000000)>>24;
312 info
->type
[1] = (disk_type
& 0x00FF0000)>>16;
313 info
->type
[2] = (disk_type
& 0x0000FF00)>>8;
314 info
->type
[3] = '\\';
315 info
->type
[4] = (disk_type
& 0x000000FF) + '0';
321 void print_part_amiga (block_dev_desc_t
*dev_desc
)
323 struct rigid_disk_block
*rdb
;
324 struct bootcode_block
*boot
;
325 struct partition_block
*p
;
329 rdb
= get_rdisk(dev_desc
);
332 PRINTF("print_part_amiga: no rdb found\n");
336 PRINTF("print_part_amiga: Scanning partition list\n");
338 block
= rdb
->partition_list
;
339 PRINTF("print_part_amiga: partition list at 0x%x\n", block
);
341 printf("Summary: DiskBlockSize: %d\n"
343 " Sectors/Track: %d\n"
345 rdb
->block_bytes
, rdb
->cylinders
, rdb
->sectors
,
348 printf(" First Num. \n"
349 "Nr. Part. Name Block Block Type Boot Priority\n");
351 while (block
!= 0xFFFFFFFF)
355 PRINTF("Trying to load block #0x%X\n", block
);
357 res
= dev_desc
->block_read(dev_desc
->dev
, block
, 1,
358 (ulong
*)block_buffer
);
361 p
= (struct partition_block
*)block_buffer
;
362 if (p
->id
== AMIGA_ID_PART
)
364 PRINTF("PART block suspect at 0x%x, checking checksum\n",block
);
365 if (sum_block((struct block_header
*)p
) == 0)
367 printf("%-4d ", i
); i
++;
371 } else block
= 0xFFFFFFFF;
372 } else block
= 0xFFFFFFFF;
375 boot
= get_bootcode(dev_desc
);
378 printf("Disk is bootable\n");