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_MG_DISK) || \
31 defined(CONFIG_CMD_SCSI) || \
32 defined(CONFIG_CMD_USB) || \
33 defined(CONFIG_MMC) || \
34 defined(CONFIG_SYSTEMACE)
39 #define PRINTF(fmt, args...) printf(fmt ,##args)
41 #define PRINTF(fmt, args...)
51 static unsigned char block_buffer[DEFAULT_SECTOR_SIZE];
52 static struct rigid_disk_block rdb = {0};
53 static struct bootcode_block bootcode = {0};
56 * Copy a bcpl to a c string
58 static void bcpl_strcpy(char *to, char *from)
71 * Print a BCPL String. BCPL strings start with a byte with the length
72 * of the string, and don't contain a terminating nul character
74 static void bstr_print(char *string)
83 buffer[i++] = *string++;
88 printf("%-10s", buffer);
92 * Sum a block. The checksum of a block must end up at zero
93 * to be valid. The chk_sum field is selected so that adding
96 int sum_block(struct block_header *header)
98 s32 *block = (s32 *)header;
102 for (i = 0; i < header->summed_longs; i++)
109 * Print an AmigaOS disk type. Disk types are a four-byte identifier
110 * describing the file system. They are usually written as a three-letter
111 * word followed by a backslash and a version number. For example,
112 * DOS\0 would be the original file system. SFS\0 would be SmartFileSystem.
115 static void print_disk_type(u32 disk_type)
118 buffer[0] = (disk_type & 0xFF000000)>>24;
119 buffer[1] = (disk_type & 0x00FF0000)>>16;
120 buffer[2] = (disk_type & 0x0000FF00)>>8;
122 buffer[4] = (disk_type & 0x000000FF) + '0';
124 printf("%s", buffer);
128 * Print the info contained within the given partition block
130 static void print_part_info(struct partition_block *p)
132 struct amiga_part_geometry *g;
134 g = (struct amiga_part_geometry *)&(p->environment);
136 bstr_print(p->drive_name);
138 g->low_cyl * g->block_per_track * g->surfaces ,
139 (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1);
140 print_disk_type(g->dos_type);
141 printf("\t%5d\n", g->boot_priority);
145 * Search for the Rigid Disk Block. The rigid disk block is required
146 * to be within the first 16 blocks of a drive, needs to have
147 * the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid
148 * sum-to-zero checksum
150 struct rigid_disk_block *get_rdisk(block_dev_desc_t *dev_desc)
156 s = getenv("amiga_scanlimit");
158 limit = simple_strtoul(s, NULL, 10);
160 limit = AMIGA_BLOCK_LIMIT;
162 for (i=0; i<limit; i++)
164 ulong res = dev_desc->block_read(dev_desc->dev, i, 1,
165 (ulong *)block_buffer);
168 struct rigid_disk_block *trdb = (struct rigid_disk_block *)block_buffer;
169 if (trdb->id == AMIGA_ID_RDISK)
171 PRINTF("Rigid disk block suspect at %d, checking checksum\n",i);
172 if (sum_block((struct block_header *)block_buffer) == 0)
175 memcpy(&rdb, trdb, sizeof(struct rigid_disk_block));
176 return (struct rigid_disk_block *)&rdb;
181 PRINTF("Done scanning, no RDB found\n");
186 * Search for boot code
187 * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the
191 struct bootcode_block *get_bootcode(block_dev_desc_t *dev_desc)
197 s = getenv("amiga_scanlimit");
199 limit = simple_strtoul(s, NULL, 10);
201 limit = AMIGA_BLOCK_LIMIT;
203 PRINTF("Scanning for BOOT from 0 to %d\n", limit);
205 for (i = 0; i < limit; i++)
207 ulong res = dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)block_buffer);
210 struct bootcode_block *boot = (struct bootcode_block *)block_buffer;
211 if (boot->id == AMIGA_ID_BOOT)
213 PRINTF("BOOT block at %d, checking checksum\n", i);
214 if (sum_block((struct block_header *)block_buffer) == 0)
216 PRINTF("Found valid bootcode block\n");
217 memcpy(&bootcode, boot, sizeof(struct bootcode_block));
224 PRINTF("No boot code found on disk\n");
229 * Test if the given partition has an Amiga partition table/Rigid
232 int test_part_amiga(block_dev_desc_t *dev_desc)
234 struct rigid_disk_block *rdb;
235 struct bootcode_block *bootcode;
237 PRINTF("test_part_amiga: Testing for an Amiga RDB partition\n");
239 rdb = get_rdisk(dev_desc);
242 bootcode = get_bootcode(dev_desc);
244 PRINTF("test_part_amiga: bootable Amiga disk\n");
246 PRINTF("test_part_amiga: non-bootable Amiga disk\n");
252 PRINTF("test_part_amiga: no RDB found\n");
259 * Find partition number partnum on the given drive.
261 static struct partition_block *find_partition(block_dev_desc_t *dev_desc, int partnum)
263 struct rigid_disk_block *rdb;
264 struct partition_block *p;
267 PRINTF("Trying to find partition block %d\n", partnum);
268 rdb = get_rdisk(dev_desc);
271 PRINTF("find_partition: no rdb found\n");
275 PRINTF("find_partition: Scanning partition list\n");
277 block = rdb->partition_list;
278 PRINTF("find_partition: partition list at 0x%x\n", block);
280 while (block != 0xFFFFFFFF)
282 ulong res = dev_desc->block_read(dev_desc->dev, block, 1,
283 (ulong *)block_buffer);
286 p = (struct partition_block *)block_buffer;
287 if (p->id == AMIGA_ID_PART)
289 PRINTF("PART block suspect at 0x%x, checking checksum\n",block);
290 if (sum_block((struct block_header *)p) == 0)
292 if (partnum == 0) break;
299 } else block = 0xFFFFFFFF;
300 } else block = 0xFFFFFFFF;
303 if (block == 0xFFFFFFFF)
305 PRINTF("PART block not found\n");
309 return (struct partition_block *)block_buffer;
313 * Get info about a partition
315 int get_partition_info_amiga (block_dev_desc_t *dev_desc, int part, disk_partition_t *info)
317 struct partition_block *p = find_partition(dev_desc, part-1);
318 struct amiga_part_geometry *g;
323 g = (struct amiga_part_geometry *)&(p->environment);
324 info->start = g->low_cyl * g->block_per_track * g->surfaces;
325 info->size = (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1;
326 info->blksz = rdb.block_bytes;
327 bcpl_strcpy(info->name, p->drive_name);
330 disk_type = g->dos_type;
332 info->type[0] = (disk_type & 0xFF000000)>>24;
333 info->type[1] = (disk_type & 0x00FF0000)>>16;
334 info->type[2] = (disk_type & 0x0000FF00)>>8;
335 info->type[3] = '\\';
336 info->type[4] = (disk_type & 0x000000FF) + '0';
342 void print_part_amiga (block_dev_desc_t *dev_desc)
344 struct rigid_disk_block *rdb;
345 struct bootcode_block *boot;
346 struct partition_block *p;
350 rdb = get_rdisk(dev_desc);
353 PRINTF("print_part_amiga: no rdb found\n");
357 PRINTF("print_part_amiga: Scanning partition list\n");
359 block = rdb->partition_list;
360 PRINTF("print_part_amiga: partition list at 0x%x\n", block);
362 printf("Summary: DiskBlockSize: %d\n"
364 " Sectors/Track: %d\n"
366 rdb->block_bytes, rdb->cylinders, rdb->sectors,
369 printf(" First Num. \n"
370 "Nr. Part. Name Block Block Type Boot Priority\n");
372 while (block != 0xFFFFFFFF)
376 PRINTF("Trying to load block #0x%X\n", block);
378 res = dev_desc->block_read(dev_desc->dev, block, 1,
379 (ulong *)block_buffer);
382 p = (struct partition_block *)block_buffer;
383 if (p->id == AMIGA_ID_PART)
385 PRINTF("PART block suspect at 0x%x, checking checksum\n",block);
386 if (sum_block((struct block_header *)p) == 0)
388 printf("%-4d ", i); i++;
392 } else block = 0xFFFFFFFF;
393 } else block = 0xFFFFFFFF;
396 boot = get_bootcode(dev_desc);
399 printf("Disk is bootable\n");