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,
28 #include "part_amiga.h"
30 #if ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_AMIGA_PARTITION)
35 #define PRINTF(fmt, args...) printf(fmt ,##args)
37 #define PRINTF(fmt, args...)
47 static unsigned char block_buffer[DEFAULT_SECTOR_SIZE];
48 static struct rigid_disk_block rdb = {0};
49 static struct bootcode_block bootcode = {0};
52 * Copy a bcpl to a c string
54 static void bcpl_strcpy(char *to, char *from)
67 * Print a BCPL String. BCPL strings start with a byte with the length
68 * of the string, and don't contain a terminating nul character
70 static void bstr_print(char *string)
79 buffer[i++] = *string++;
84 printf("%-10s", buffer);
88 * Sum a block. The checksum of a block must end up at zero
89 * to be valid. The chk_sum field is selected so that adding
92 int sum_block(struct block_header *header)
94 s32 *block = (s32 *)header;
98 for (i = 0; i < header->summed_longs; i++)
105 * Print an AmigaOS disk type. Disk types are a four-byte identifier
106 * describing the file system. They are usually written as a three-letter
107 * word followed by a backslash and a version number. For example,
108 * DOS\0 would be the original file system. SFS\0 would be SmartFileSystem.
111 static void print_disk_type(u32 disk_type)
114 buffer[0] = (disk_type & 0xFF000000)>>24;
115 buffer[1] = (disk_type & 0x00FF0000)>>16;
116 buffer[2] = (disk_type & 0x0000FF00)>>8;
118 buffer[4] = (disk_type & 0x000000FF) + '0';
120 printf("%s", buffer);
124 * Print the info contained within the given partition block
126 static void print_part_info(struct partition_block *p)
128 struct amiga_part_geometry *g;
130 g = (struct amiga_part_geometry *)&(p->environment);
132 bstr_print(p->drive_name);
134 g->low_cyl * g->block_per_track * g->surfaces ,
135 (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1);
136 print_disk_type(g->dos_type);
137 printf("\t%5d\n", g->boot_priority);
141 * Search for the Rigid Disk Block. The rigid disk block is required
142 * to be within the first 16 blocks of a drive, needs to have
143 * the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid
144 * sum-to-zero checksum
146 struct rigid_disk_block *get_rdisk(block_dev_desc_t *dev_desc)
152 s = getenv("amiga_scanlimit");
156 limit = AMIGA_BLOCK_LIMIT;
158 for (i=0; i<limit; i++)
160 ulong res = dev_desc->block_read(dev_desc->dev, i, 1,
161 (ulong *)block_buffer);
164 struct rigid_disk_block *trdb = (struct rigid_disk_block *)block_buffer;
165 if (trdb->id == AMIGA_ID_RDISK)
167 PRINTF("Rigid disk block suspect at %d, checking checksum\n",i);
168 if (sum_block((struct block_header *)block_buffer) == 0)
171 memcpy(&rdb, trdb, sizeof(struct rigid_disk_block));
172 return (struct rigid_disk_block *)&rdb;
177 PRINTF("Done scanning, no RDB found\n");
182 * Search for boot code
183 * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the
187 struct bootcode_block *get_bootcode(block_dev_desc_t *dev_desc)
193 s = getenv("amiga_scanlimit");
197 limit = AMIGA_BLOCK_LIMIT;
199 PRINTF("Scanning for BOOT from 0 to %d\n", limit);
201 for (i = 0; i < limit; i++)
203 ulong res = dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)block_buffer);
206 struct bootcode_block *boot = (struct bootcode_block *)block_buffer;
207 if (boot->id == AMIGA_ID_BOOT)
209 PRINTF("BOOT block at %d, checking checksum\n", i);
210 if (sum_block((struct block_header *)block_buffer) == 0)
212 PRINTF("Found valid bootcode block\n");
213 memcpy(&bootcode, boot, sizeof(struct bootcode_block));
220 PRINTF("No boot code found on disk\n");
225 * Test if the given partition has an Amiga partition table/Rigid
228 int test_part_amiga(block_dev_desc_t *dev_desc)
230 struct rigid_disk_block *rdb;
231 struct bootcode_block *bootcode;
233 PRINTF("test_part_amiga: Testing for an Amiga RDB partition\n");
235 rdb = get_rdisk(dev_desc);
238 bootcode = get_bootcode(dev_desc);
240 PRINTF("test_part_amiga: bootable Amiga disk\n");
242 PRINTF("test_part_amiga: non-bootable Amiga disk\n");
248 PRINTF("test_part_amiga: no RDB found\n");
255 * Find partition number partnum on the given drive.
257 static struct partition_block *find_partition(block_dev_desc_t *dev_desc, int partnum)
259 struct rigid_disk_block *rdb;
260 struct partition_block *p;
263 PRINTF("Trying to find partition block %d\n", partnum);
264 rdb = get_rdisk(dev_desc);
267 PRINTF("find_partition: no rdb found\n");
271 PRINTF("find_partition: Scanning partition list\n");
273 block = rdb->partition_list;
274 PRINTF("find_partition: partition list at 0x%x\n", block);
276 while (block != 0xFFFFFFFF)
278 ulong res = dev_desc->block_read(dev_desc->dev, block, 1,
279 (ulong *)block_buffer);
282 p = (struct partition_block *)block_buffer;
283 if (p->id == AMIGA_ID_PART)
285 PRINTF("PART block suspect at 0x%x, checking checksum\n",block);
286 if (sum_block((struct block_header *)p) == 0)
288 if (partnum == 0) break;
295 } else block = 0xFFFFFFFF;
296 } else block = 0xFFFFFFFF;
299 if (block == 0xFFFFFFFF)
301 PRINTF("PART block not found\n");
305 return (struct partition_block *)block_buffer;
309 * Get info about a partition
311 int get_partition_info_amiga (block_dev_desc_t *dev_desc, int part, disk_partition_t *info)
313 struct partition_block *p = find_partition(dev_desc, part-1);
314 struct amiga_part_geometry *g;
319 g = (struct amiga_part_geometry *)&(p->environment);
320 info->start = g->low_cyl * g->block_per_track * g->surfaces;
321 info->size = (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1;
322 info->blksz = rdb.block_bytes;
323 bcpl_strcpy(info->name, p->drive_name);
326 disk_type = g->dos_type;
328 info->type[0] = (disk_type & 0xFF000000)>>24;
329 info->type[1] = (disk_type & 0x00FF0000)>>16;
330 info->type[2] = (disk_type & 0x0000FF00)>>8;
331 info->type[3] = '\\';
332 info->type[4] = (disk_type & 0x000000FF) + '0';
338 void print_part_amiga (block_dev_desc_t *dev_desc)
340 struct rigid_disk_block *rdb;
341 struct bootcode_block *boot;
342 struct partition_block *p;
346 rdb = get_rdisk(dev_desc);
349 PRINTF("print_part_amiga: no rdb found\n");
353 PRINTF("print_part_amiga: Scanning partition list\n");
355 block = rdb->partition_list;
356 PRINTF("print_part_amiga: partition list at 0x%x\n", block);
358 printf("Summary: DiskBlockSize: %d\n"
360 " Sectors/Track: %d\n"
362 rdb->block_bytes, rdb->cylinders, rdb->sectors,
365 printf(" First Num. \n"
366 "Nr. Part. Name Block Block Type Boot Priority\n");
368 while (block != 0xFFFFFFFF)
372 PRINTF("Trying to load block #0x%X\n", block);
374 res = dev_desc->block_read(dev_desc->dev, block, 1,
375 (ulong *)block_buffer);
378 p = (struct partition_block *)block_buffer;
379 if (p->id == AMIGA_ID_PART)
381 PRINTF("PART block suspect at 0x%x, checking checksum\n",block);
382 if (sum_block((struct block_header *)p) == 0)
384 printf("%-4d ", i); i++;
388 } else block = 0xFFFFFFFF;
389 } else block = 0xFFFFFFFF;
392 boot = get_bootcode(dev_desc);
395 printf("Disk is bootable\n");