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 #if (defined(CONFIG_CMD_IDE) || \
30 defined(CONFIG_CMD_SCSI) || \
31 defined(CONFIG_CMD_USB) || \
32 defined(CONFIG_MMC) || \
33 defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_AMIGA_PARTITION)
38 #define PRINTF(fmt, args...) printf(fmt ,##args)
40 #define PRINTF(fmt, args...)
50 static unsigned char block_buffer
[DEFAULT_SECTOR_SIZE
];
51 static struct rigid_disk_block rdb
= {0};
52 static struct bootcode_block bootcode
= {0};
55 * Copy a bcpl to a c string
57 static void bcpl_strcpy(char *to
, char *from
)
70 * Print a BCPL String. BCPL strings start with a byte with the length
71 * of the string, and don't contain a terminating nul character
73 static void bstr_print(char *string
)
82 buffer
[i
++] = *string
++;
87 printf("%-10s", buffer
);
91 * Sum a block. The checksum of a block must end up at zero
92 * to be valid. The chk_sum field is selected so that adding
95 int sum_block(struct block_header
*header
)
97 s32
*block
= (s32
*)header
;
101 for (i
= 0; i
< header
->summed_longs
; i
++)
108 * Print an AmigaOS disk type. Disk types are a four-byte identifier
109 * describing the file system. They are usually written as a three-letter
110 * word followed by a backslash and a version number. For example,
111 * DOS\0 would be the original file system. SFS\0 would be SmartFileSystem.
114 static void print_disk_type(u32 disk_type
)
117 buffer
[0] = (disk_type
& 0xFF000000)>>24;
118 buffer
[1] = (disk_type
& 0x00FF0000)>>16;
119 buffer
[2] = (disk_type
& 0x0000FF00)>>8;
121 buffer
[4] = (disk_type
& 0x000000FF) + '0';
123 printf("%s", buffer
);
127 * Print the info contained within the given partition block
129 static void print_part_info(struct partition_block
*p
)
131 struct amiga_part_geometry
*g
;
133 g
= (struct amiga_part_geometry
*)&(p
->environment
);
135 bstr_print(p
->drive_name
);
137 g
->low_cyl
* g
->block_per_track
* g
->surfaces
,
138 (g
->high_cyl
- g
->low_cyl
+ 1) * g
->block_per_track
* g
->surfaces
- 1);
139 print_disk_type(g
->dos_type
);
140 printf("\t%5d\n", g
->boot_priority
);
144 * Search for the Rigid Disk Block. The rigid disk block is required
145 * to be within the first 16 blocks of a drive, needs to have
146 * the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid
147 * sum-to-zero checksum
149 struct rigid_disk_block
*get_rdisk(block_dev_desc_t
*dev_desc
)
155 s
= getenv("amiga_scanlimit");
159 limit
= AMIGA_BLOCK_LIMIT
;
161 for (i
=0; i
<limit
; i
++)
163 ulong res
= dev_desc
->block_read(dev_desc
->dev
, i
, 1,
164 (ulong
*)block_buffer
);
167 struct rigid_disk_block
*trdb
= (struct rigid_disk_block
*)block_buffer
;
168 if (trdb
->id
== AMIGA_ID_RDISK
)
170 PRINTF("Rigid disk block suspect at %d, checking checksum\n",i
);
171 if (sum_block((struct block_header
*)block_buffer
) == 0)
174 memcpy(&rdb
, trdb
, sizeof(struct rigid_disk_block
));
175 return (struct rigid_disk_block
*)&rdb
;
180 PRINTF("Done scanning, no RDB found\n");
185 * Search for boot code
186 * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the
190 struct bootcode_block
*get_bootcode(block_dev_desc_t
*dev_desc
)
196 s
= getenv("amiga_scanlimit");
200 limit
= AMIGA_BLOCK_LIMIT
;
202 PRINTF("Scanning for BOOT from 0 to %d\n", limit
);
204 for (i
= 0; i
< limit
; i
++)
206 ulong res
= dev_desc
->block_read(dev_desc
->dev
, i
, 1, (ulong
*)block_buffer
);
209 struct bootcode_block
*boot
= (struct bootcode_block
*)block_buffer
;
210 if (boot
->id
== AMIGA_ID_BOOT
)
212 PRINTF("BOOT block at %d, checking checksum\n", i
);
213 if (sum_block((struct block_header
*)block_buffer
) == 0)
215 PRINTF("Found valid bootcode block\n");
216 memcpy(&bootcode
, boot
, sizeof(struct bootcode_block
));
223 PRINTF("No boot code found on disk\n");
228 * Test if the given partition has an Amiga partition table/Rigid
231 int test_part_amiga(block_dev_desc_t
*dev_desc
)
233 struct rigid_disk_block
*rdb
;
234 struct bootcode_block
*bootcode
;
236 PRINTF("test_part_amiga: Testing for an Amiga RDB partition\n");
238 rdb
= get_rdisk(dev_desc
);
241 bootcode
= get_bootcode(dev_desc
);
243 PRINTF("test_part_amiga: bootable Amiga disk\n");
245 PRINTF("test_part_amiga: non-bootable Amiga disk\n");
251 PRINTF("test_part_amiga: no RDB found\n");
258 * Find partition number partnum on the given drive.
260 static struct partition_block
*find_partition(block_dev_desc_t
*dev_desc
, int partnum
)
262 struct rigid_disk_block
*rdb
;
263 struct partition_block
*p
;
266 PRINTF("Trying to find partition block %d\n", partnum
);
267 rdb
= get_rdisk(dev_desc
);
270 PRINTF("find_partition: no rdb found\n");
274 PRINTF("find_partition: Scanning partition list\n");
276 block
= rdb
->partition_list
;
277 PRINTF("find_partition: partition list at 0x%x\n", block
);
279 while (block
!= 0xFFFFFFFF)
281 ulong res
= dev_desc
->block_read(dev_desc
->dev
, block
, 1,
282 (ulong
*)block_buffer
);
285 p
= (struct partition_block
*)block_buffer
;
286 if (p
->id
== AMIGA_ID_PART
)
288 PRINTF("PART block suspect at 0x%x, checking checksum\n",block
);
289 if (sum_block((struct block_header
*)p
) == 0)
291 if (partnum
== 0) break;
298 } else block
= 0xFFFFFFFF;
299 } else block
= 0xFFFFFFFF;
302 if (block
== 0xFFFFFFFF)
304 PRINTF("PART block not found\n");
308 return (struct partition_block
*)block_buffer
;
312 * Get info about a partition
314 int get_partition_info_amiga (block_dev_desc_t
*dev_desc
, int part
, disk_partition_t
*info
)
316 struct partition_block
*p
= find_partition(dev_desc
, part
-1);
317 struct amiga_part_geometry
*g
;
322 g
= (struct amiga_part_geometry
*)&(p
->environment
);
323 info
->start
= g
->low_cyl
* g
->block_per_track
* g
->surfaces
;
324 info
->size
= (g
->high_cyl
- g
->low_cyl
+ 1) * g
->block_per_track
* g
->surfaces
- 1;
325 info
->blksz
= rdb
.block_bytes
;
326 bcpl_strcpy(info
->name
, p
->drive_name
);
329 disk_type
= g
->dos_type
;
331 info
->type
[0] = (disk_type
& 0xFF000000)>>24;
332 info
->type
[1] = (disk_type
& 0x00FF0000)>>16;
333 info
->type
[2] = (disk_type
& 0x0000FF00)>>8;
334 info
->type
[3] = '\\';
335 info
->type
[4] = (disk_type
& 0x000000FF) + '0';
341 void print_part_amiga (block_dev_desc_t
*dev_desc
)
343 struct rigid_disk_block
*rdb
;
344 struct bootcode_block
*boot
;
345 struct partition_block
*p
;
349 rdb
= get_rdisk(dev_desc
);
352 PRINTF("print_part_amiga: no rdb found\n");
356 PRINTF("print_part_amiga: Scanning partition list\n");
358 block
= rdb
->partition_list
;
359 PRINTF("print_part_amiga: partition list at 0x%x\n", block
);
361 printf("Summary: DiskBlockSize: %d\n"
363 " Sectors/Track: %d\n"
365 rdb
->block_bytes
, rdb
->cylinders
, rdb
->sectors
,
368 printf(" First Num. \n"
369 "Nr. Part. Name Block Block Type Boot Priority\n");
371 while (block
!= 0xFFFFFFFF)
375 PRINTF("Trying to load block #0x%X\n", block
);
377 res
= dev_desc
->block_read(dev_desc
->dev
, block
, 1,
378 (ulong
*)block_buffer
);
381 p
= (struct partition_block
*)block_buffer
;
382 if (p
->id
== AMIGA_ID_PART
)
384 PRINTF("PART block suspect at 0x%x, checking checksum\n",block
);
385 if (sum_block((struct block_header
*)p
) == 0)
387 printf("%-4d ", i
); i
++;
391 } else block
= 0xFFFFFFFF;
392 } else block
= 0xFFFFFFFF;
395 boot
= get_bootcode(dev_desc
);
398 printf("Disk is bootable\n");