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git.ipfire.org Git - thirdparty/u-boot.git/blob - disk/part_amiga.c
3 * Hans-Joerg Frieden, Hyperion Entertainment
4 * Hans-JoergF@hyperion-entertainment.com
6 * See file CREDITS for list of people who contributed to this
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.
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.
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,
27 #include "part_amiga.h"
29 #ifdef HAVE_BLOCK_DEVICE
34 #define PRINTF(fmt, args...) printf(fmt ,##args)
36 #define PRINTF(fmt, args...)
46 static unsigned char block_buffer
[DEFAULT_SECTOR_SIZE
];
47 static struct rigid_disk_block rdb
= {0};
48 static struct bootcode_block bootcode
= {0};
51 * Copy a bcpl to a c string
53 static void bcpl_strcpy(char *to
, char *from
)
66 * Print a BCPL String. BCPL strings start with a byte with the length
67 * of the string, and don't contain a terminating nul character
69 static void bstr_print(char *string
)
78 buffer
[i
++] = *string
++;
83 printf("%-10s", buffer
);
87 * Sum a block. The checksum of a block must end up at zero
88 * to be valid. The chk_sum field is selected so that adding
91 int sum_block(struct block_header
*header
)
93 s32
*block
= (s32
*)header
;
97 for (i
= 0; i
< header
->summed_longs
; i
++)
104 * Print an AmigaOS disk type. Disk types are a four-byte identifier
105 * describing the file system. They are usually written as a three-letter
106 * word followed by a backslash and a version number. For example,
107 * DOS\0 would be the original file system. SFS\0 would be SmartFileSystem.
110 static void print_disk_type(u32 disk_type
)
113 buffer
[0] = (disk_type
& 0xFF000000)>>24;
114 buffer
[1] = (disk_type
& 0x00FF0000)>>16;
115 buffer
[2] = (disk_type
& 0x0000FF00)>>8;
117 buffer
[4] = (disk_type
& 0x000000FF) + '0';
119 printf("%s", buffer
);
123 * Print the info contained within the given partition block
125 static void print_part_info(struct partition_block
*p
)
127 struct amiga_part_geometry
*g
;
129 g
= (struct amiga_part_geometry
*)&(p
->environment
);
131 bstr_print(p
->drive_name
);
133 g
->low_cyl
* g
->block_per_track
* g
->surfaces
,
134 (g
->high_cyl
- g
->low_cyl
+ 1) * g
->block_per_track
* g
->surfaces
- 1);
135 print_disk_type(g
->dos_type
);
136 printf("\t%5d\n", g
->boot_priority
);
140 * Search for the Rigid Disk Block. The rigid disk block is required
141 * to be within the first 16 blocks of a drive, needs to have
142 * the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid
143 * sum-to-zero checksum
145 struct rigid_disk_block
*get_rdisk(block_dev_desc_t
*dev_desc
)
151 s
= getenv("amiga_scanlimit");
153 limit
= simple_strtoul(s
, NULL
, 10);
155 limit
= AMIGA_BLOCK_LIMIT
;
157 for (i
=0; i
<limit
; i
++)
159 ulong res
= dev_desc
->block_read(dev_desc
->dev
, i
, 1,
160 (ulong
*)block_buffer
);
163 struct rigid_disk_block
*trdb
= (struct rigid_disk_block
*)block_buffer
;
164 if (trdb
->id
== AMIGA_ID_RDISK
)
166 PRINTF("Rigid disk block suspect at %d, checking checksum\n",i
);
167 if (sum_block((struct block_header
*)block_buffer
) == 0)
170 memcpy(&rdb
, trdb
, sizeof(struct rigid_disk_block
));
171 return (struct rigid_disk_block
*)&rdb
;
176 PRINTF("Done scanning, no RDB found\n");
181 * Search for boot code
182 * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the
186 struct bootcode_block
*get_bootcode(block_dev_desc_t
*dev_desc
)
192 s
= getenv("amiga_scanlimit");
194 limit
= simple_strtoul(s
, NULL
, 10);
196 limit
= AMIGA_BLOCK_LIMIT
;
198 PRINTF("Scanning for BOOT from 0 to %d\n", limit
);
200 for (i
= 0; i
< limit
; i
++)
202 ulong res
= dev_desc
->block_read(dev_desc
->dev
, i
, 1, (ulong
*)block_buffer
);
205 struct bootcode_block
*boot
= (struct bootcode_block
*)block_buffer
;
206 if (boot
->id
== AMIGA_ID_BOOT
)
208 PRINTF("BOOT block at %d, checking checksum\n", i
);
209 if (sum_block((struct block_header
*)block_buffer
) == 0)
211 PRINTF("Found valid bootcode block\n");
212 memcpy(&bootcode
, boot
, sizeof(struct bootcode_block
));
219 PRINTF("No boot code found on disk\n");
224 * Test if the given partition has an Amiga partition table/Rigid
227 int test_part_amiga(block_dev_desc_t
*dev_desc
)
229 struct rigid_disk_block
*rdb
;
230 struct bootcode_block
*bootcode
;
232 PRINTF("test_part_amiga: Testing for an Amiga RDB partition\n");
234 rdb
= get_rdisk(dev_desc
);
237 bootcode
= get_bootcode(dev_desc
);
239 PRINTF("test_part_amiga: bootable Amiga disk\n");
241 PRINTF("test_part_amiga: non-bootable Amiga disk\n");
247 PRINTF("test_part_amiga: no RDB found\n");
254 * Find partition number partnum on the given drive.
256 static struct partition_block
*find_partition(block_dev_desc_t
*dev_desc
, int partnum
)
258 struct rigid_disk_block
*rdb
;
259 struct partition_block
*p
;
262 PRINTF("Trying to find partition block %d\n", partnum
);
263 rdb
= get_rdisk(dev_desc
);
266 PRINTF("find_partition: no rdb found\n");
270 PRINTF("find_partition: Scanning partition list\n");
272 block
= rdb
->partition_list
;
273 PRINTF("find_partition: partition list at 0x%x\n", block
);
275 while (block
!= 0xFFFFFFFF)
277 ulong res
= dev_desc
->block_read(dev_desc
->dev
, block
, 1,
278 (ulong
*)block_buffer
);
281 p
= (struct partition_block
*)block_buffer
;
282 if (p
->id
== AMIGA_ID_PART
)
284 PRINTF("PART block suspect at 0x%x, checking checksum\n",block
);
285 if (sum_block((struct block_header
*)p
) == 0)
287 if (partnum
== 0) break;
294 } else block
= 0xFFFFFFFF;
295 } else block
= 0xFFFFFFFF;
298 if (block
== 0xFFFFFFFF)
300 PRINTF("PART block not found\n");
304 return (struct partition_block
*)block_buffer
;
308 * Get info about a partition
310 int get_partition_info_amiga (block_dev_desc_t
*dev_desc
, int part
, disk_partition_t
*info
)
312 struct partition_block
*p
= find_partition(dev_desc
, part
-1);
313 struct amiga_part_geometry
*g
;
318 g
= (struct amiga_part_geometry
*)&(p
->environment
);
319 info
->start
= g
->low_cyl
* g
->block_per_track
* g
->surfaces
;
320 info
->size
= (g
->high_cyl
- g
->low_cyl
+ 1) * g
->block_per_track
* g
->surfaces
- 1;
321 info
->blksz
= rdb
.block_bytes
;
322 bcpl_strcpy(info
->name
, p
->drive_name
);
325 disk_type
= g
->dos_type
;
327 info
->type
[0] = (disk_type
& 0xFF000000)>>24;
328 info
->type
[1] = (disk_type
& 0x00FF0000)>>16;
329 info
->type
[2] = (disk_type
& 0x0000FF00)>>8;
330 info
->type
[3] = '\\';
331 info
->type
[4] = (disk_type
& 0x000000FF) + '0';
337 void print_part_amiga (block_dev_desc_t
*dev_desc
)
339 struct rigid_disk_block
*rdb
;
340 struct bootcode_block
*boot
;
341 struct partition_block
*p
;
345 rdb
= get_rdisk(dev_desc
);
348 PRINTF("print_part_amiga: no rdb found\n");
352 PRINTF("print_part_amiga: Scanning partition list\n");
354 block
= rdb
->partition_list
;
355 PRINTF("print_part_amiga: partition list at 0x%x\n", block
);
357 printf("Summary: DiskBlockSize: %d\n"
359 " Sectors/Track: %d\n"
361 rdb
->block_bytes
, rdb
->cylinders
, rdb
->sectors
,
364 printf(" First Num. \n"
365 "Nr. Part. Name Block Block Type Boot Priority\n");
367 while (block
!= 0xFFFFFFFF)
371 PRINTF("Trying to load block #0x%X\n", block
);
373 res
= dev_desc
->block_read(dev_desc
->dev
, block
, 1,
374 (ulong
*)block_buffer
);
377 p
= (struct partition_block
*)block_buffer
;
378 if (p
->id
== AMIGA_ID_PART
)
380 PRINTF("PART block suspect at 0x%x, checking checksum\n",block
);
381 if (sum_block((struct block_header
*)p
) == 0)
383 printf("%-4d ", i
); i
++;
387 } else block
= 0xFFFFFFFF;
388 } else block
= 0xFFFFFFFF;
391 boot
= get_bootcode(dev_desc
);
394 printf("Disk is bootable\n");