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c7de829c WD |
1 | /* |
2 | * (C) Copyright 2001 | |
8bde7f77 | 3 | * Hans-Joerg Frieden, Hyperion Entertainment |
c7de829c WD |
4 | * Hans-JoergF@hyperion-entertainment.com |
5 | * | |
6 | * See file CREDITS for list of people who contributed to this | |
7 | * project. | |
8 | * | |
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. | |
13 | * | |
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. | |
18 | * | |
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, | |
22 | * MA 02111-1307 USA | |
23 | */ | |
24 | #include <common.h> | |
25 | #include <command.h> | |
26 | #include <ide.h> | |
c7de829c WD |
27 | #include "part_amiga.h" |
28 | ||
cde5c64d JL |
29 | #if (defined(CONFIG_CMD_IDE) || \ |
30 | defined(CONFIG_CMD_SCSI) || \ | |
31 | defined(CONFIG_CMD_USB) || \ | |
1968e615 WD |
32 | defined(CONFIG_MMC) || \ |
33 | defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_AMIGA_PARTITION) | |
c7de829c WD |
34 | |
35 | #undef AMIGA_DEBUG | |
36 | ||
37 | #ifdef AMIGA_DEBUG | |
38 | #define PRINTF(fmt, args...) printf(fmt ,##args) | |
39 | #else | |
40 | #define PRINTF(fmt, args...) | |
41 | #endif | |
42 | ||
43 | struct block_header | |
44 | { | |
45 | u32 id; | |
46 | u32 summed_longs; | |
47 | s32 chk_sum; | |
48 | }; | |
49 | ||
50 | static unsigned char block_buffer[DEFAULT_SECTOR_SIZE]; | |
51 | static struct rigid_disk_block rdb = {0}; | |
52 | static struct bootcode_block bootcode = {0}; | |
53 | ||
54 | /* | |
55 | * Copy a bcpl to a c string | |
56 | */ | |
57 | static void bcpl_strcpy(char *to, char *from) | |
58 | { | |
59 | int len = *from++; | |
60 | ||
61 | while (len) | |
62 | { | |
63 | *to++ = *from++; | |
64 | len--; | |
65 | } | |
66 | *to = 0; | |
67 | } | |
68 | ||
69 | /* | |
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 | |
72 | */ | |
73 | static void bstr_print(char *string) | |
74 | { | |
75 | int len = *string++; | |
76 | char buffer[256]; | |
77 | int i; | |
8bde7f77 | 78 | |
c7de829c WD |
79 | i = 0; |
80 | while (len) | |
81 | { | |
82 | buffer[i++] = *string++; | |
83 | len--; | |
84 | } | |
85 | ||
86 | buffer[i] = 0; | |
87 | printf("%-10s", buffer); | |
88 | } | |
89 | ||
90 | /* | |
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 | |
93 | * it yields zero. | |
94 | */ | |
95 | int sum_block(struct block_header *header) | |
96 | { | |
97 | s32 *block = (s32 *)header; | |
98 | u32 i; | |
99 | s32 sum = 0; | |
100 | ||
101 | for (i = 0; i < header->summed_longs; i++) | |
102 | sum += *block++; | |
8bde7f77 | 103 | |
c7de829c WD |
104 | return (sum != 0); |
105 | } | |
106 | ||
107 | /* | |
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. | |
112 | * DOS\1 is FFS. | |
113 | */ | |
114 | static void print_disk_type(u32 disk_type) | |
115 | { | |
116 | char buffer[6]; | |
117 | buffer[0] = (disk_type & 0xFF000000)>>24; | |
118 | buffer[1] = (disk_type & 0x00FF0000)>>16; | |
119 | buffer[2] = (disk_type & 0x0000FF00)>>8; | |
120 | buffer[3] = '\\'; | |
121 | buffer[4] = (disk_type & 0x000000FF) + '0'; | |
122 | buffer[5] = 0; | |
123 | printf("%s", buffer); | |
124 | } | |
125 | ||
126 | /* | |
127 | * Print the info contained within the given partition block | |
128 | */ | |
129 | static void print_part_info(struct partition_block *p) | |
130 | { | |
131 | struct amiga_part_geometry *g; | |
8bde7f77 | 132 | |
c7de829c WD |
133 | g = (struct amiga_part_geometry *)&(p->environment); |
134 | ||
135 | bstr_print(p->drive_name); | |
8bde7f77 WD |
136 | printf("%6d\t%6d\t", |
137 | g->low_cyl * g->block_per_track * g->surfaces , | |
c7de829c WD |
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); | |
141 | } | |
142 | ||
143 | /* | |
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 | |
148 | */ | |
149 | struct rigid_disk_block *get_rdisk(block_dev_desc_t *dev_desc) | |
150 | { | |
151 | int i; | |
152 | int limit; | |
153 | char *s; | |
154 | ||
155 | s = getenv("amiga_scanlimit"); | |
156 | if (s) | |
157 | limit = atoi(s); | |
158 | else | |
159 | limit = AMIGA_BLOCK_LIMIT; | |
160 | ||
161 | for (i=0; i<limit; i++) | |
162 | { | |
163 | ulong res = dev_desc->block_read(dev_desc->dev, i, 1, | |
164 | (ulong *)block_buffer); | |
165 | if (res == 1) | |
166 | { | |
167 | struct rigid_disk_block *trdb = (struct rigid_disk_block *)block_buffer; | |
168 | if (trdb->id == AMIGA_ID_RDISK) | |
169 | { | |
170 | PRINTF("Rigid disk block suspect at %d, checking checksum\n",i); | |
171 | if (sum_block((struct block_header *)block_buffer) == 0) | |
172 | { | |
173 | PRINTF("FOUND\n"); | |
174 | memcpy(&rdb, trdb, sizeof(struct rigid_disk_block)); | |
175 | return (struct rigid_disk_block *)&rdb; | |
176 | } | |
177 | } | |
178 | } | |
179 | } | |
180 | PRINTF("Done scanning, no RDB found\n"); | |
181 | return NULL; | |
182 | } | |
183 | ||
8bde7f77 | 184 | /* |
c7de829c WD |
185 | * Search for boot code |
186 | * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the | |
187 | * Ridgid disk block | |
188 | */ | |
189 | ||
190 | struct bootcode_block *get_bootcode(block_dev_desc_t *dev_desc) | |
191 | { | |
192 | int i; | |
193 | int limit; | |
194 | char *s; | |
195 | ||
196 | s = getenv("amiga_scanlimit"); | |
197 | if (s) | |
198 | limit = atoi(s); | |
199 | else | |
200 | limit = AMIGA_BLOCK_LIMIT; | |
201 | ||
202 | PRINTF("Scanning for BOOT from 0 to %d\n", limit); | |
203 | ||
204 | for (i = 0; i < limit; i++) | |
205 | { | |
206 | ulong res = dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)block_buffer); | |
207 | if (res == 1) | |
208 | { | |
209 | struct bootcode_block *boot = (struct bootcode_block *)block_buffer; | |
210 | if (boot->id == AMIGA_ID_BOOT) | |
211 | { | |
212 | PRINTF("BOOT block at %d, checking checksum\n", i); | |
213 | if (sum_block((struct block_header *)block_buffer) == 0) | |
214 | { | |
215 | PRINTF("Found valid bootcode block\n"); | |
216 | memcpy(&bootcode, boot, sizeof(struct bootcode_block)); | |
217 | return &bootcode; | |
218 | } | |
219 | } | |
220 | } | |
221 | } | |
222 | ||
223 | PRINTF("No boot code found on disk\n"); | |
224 | return 0; | |
225 | } | |
226 | ||
8bde7f77 | 227 | /* |
c7de829c WD |
228 | * Test if the given partition has an Amiga partition table/Rigid |
229 | * Disk block | |
230 | */ | |
231 | int test_part_amiga(block_dev_desc_t *dev_desc) | |
232 | { | |
233 | struct rigid_disk_block *rdb; | |
234 | struct bootcode_block *bootcode; | |
235 | ||
236 | PRINTF("test_part_amiga: Testing for an Amiga RDB partition\n"); | |
8bde7f77 | 237 | |
c7de829c WD |
238 | rdb = get_rdisk(dev_desc); |
239 | if (rdb) | |
240 | { | |
241 | bootcode = get_bootcode(dev_desc); | |
242 | if (bootcode) | |
243 | PRINTF("test_part_amiga: bootable Amiga disk\n"); | |
244 | else | |
245 | PRINTF("test_part_amiga: non-bootable Amiga disk\n"); | |
246 | ||
247 | return 0; | |
248 | } | |
8bde7f77 | 249 | else |
c7de829c WD |
250 | { |
251 | PRINTF("test_part_amiga: no RDB found\n"); | |
252 | return -1; | |
253 | } | |
254 | ||
255 | } | |
256 | ||
8bde7f77 | 257 | /* |
c7de829c WD |
258 | * Find partition number partnum on the given drive. |
259 | */ | |
260 | static struct partition_block *find_partition(block_dev_desc_t *dev_desc, int partnum) | |
261 | { | |
262 | struct rigid_disk_block *rdb; | |
263 | struct partition_block *p; | |
264 | u32 block; | |
265 | ||
266 | PRINTF("Trying to find partition block %d\n", partnum); | |
267 | rdb = get_rdisk(dev_desc); | |
8bde7f77 | 268 | if (!rdb) |
c7de829c WD |
269 | { |
270 | PRINTF("find_partition: no rdb found\n"); | |
271 | return NULL; | |
272 | } | |
8bde7f77 | 273 | |
c7de829c WD |
274 | PRINTF("find_partition: Scanning partition list\n"); |
275 | ||
276 | block = rdb->partition_list; | |
277 | PRINTF("find_partition: partition list at 0x%x\n", block); | |
278 | ||
279 | while (block != 0xFFFFFFFF) | |
280 | { | |
281 | ulong res = dev_desc->block_read(dev_desc->dev, block, 1, | |
282 | (ulong *)block_buffer); | |
283 | if (res == 1) | |
284 | { | |
285 | p = (struct partition_block *)block_buffer; | |
286 | if (p->id == AMIGA_ID_PART) | |
287 | { | |
288 | PRINTF("PART block suspect at 0x%x, checking checksum\n",block); | |
289 | if (sum_block((struct block_header *)p) == 0) | |
290 | { | |
291 | if (partnum == 0) break; | |
8bde7f77 | 292 | else |
c7de829c WD |
293 | { |
294 | partnum--; | |
295 | block = p->next; | |
296 | } | |
297 | } | |
298 | } else block = 0xFFFFFFFF; | |
299 | } else block = 0xFFFFFFFF; | |
300 | } | |
301 | ||
8bde7f77 | 302 | if (block == 0xFFFFFFFF) |
c7de829c WD |
303 | { |
304 | PRINTF("PART block not found\n"); | |
305 | return NULL; | |
306 | } | |
307 | ||
308 | return (struct partition_block *)block_buffer; | |
309 | } | |
310 | ||
8bde7f77 | 311 | /* |
c7de829c WD |
312 | * Get info about a partition |
313 | */ | |
314 | int get_partition_info_amiga (block_dev_desc_t *dev_desc, int part, disk_partition_t *info) | |
315 | { | |
316 | struct partition_block *p = find_partition(dev_desc, part-1); | |
317 | struct amiga_part_geometry *g; | |
318 | u32 disk_type; | |
319 | ||
320 | if (!p) return -1; | |
321 | ||
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); | |
8bde7f77 | 327 | |
c7de829c WD |
328 | |
329 | disk_type = g->dos_type; | |
330 | ||
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'; | |
336 | info->type[5] = 0; | |
8bde7f77 | 337 | |
c7de829c WD |
338 | return 0; |
339 | } | |
340 | ||
341 | void print_part_amiga (block_dev_desc_t *dev_desc) | |
8bde7f77 | 342 | { |
c7de829c WD |
343 | struct rigid_disk_block *rdb; |
344 | struct bootcode_block *boot; | |
345 | struct partition_block *p; | |
346 | u32 block; | |
347 | int i = 1; | |
348 | ||
349 | rdb = get_rdisk(dev_desc); | |
8bde7f77 | 350 | if (!rdb) |
c7de829c WD |
351 | { |
352 | PRINTF("print_part_amiga: no rdb found\n"); | |
353 | return; | |
354 | } | |
8bde7f77 | 355 | |
c7de829c WD |
356 | PRINTF("print_part_amiga: Scanning partition list\n"); |
357 | ||
358 | block = rdb->partition_list; | |
359 | PRINTF("print_part_amiga: partition list at 0x%x\n", block); | |
360 | ||
361 | printf("Summary: DiskBlockSize: %d\n" | |
362 | " Cylinders : %d\n" | |
363 | " Sectors/Track: %d\n" | |
364 | " Heads : %d\n\n", | |
365 | rdb->block_bytes, rdb->cylinders, rdb->sectors, | |
366 | rdb->heads); | |
367 | ||
368 | printf(" First Num. \n" | |
369 | "Nr. Part. Name Block Block Type Boot Priority\n"); | |
370 | ||
371 | while (block != 0xFFFFFFFF) | |
372 | { | |
373 | ulong res; | |
374 | ||
375 | PRINTF("Trying to load block #0x%X\n", block); | |
8bde7f77 | 376 | |
c7de829c WD |
377 | res = dev_desc->block_read(dev_desc->dev, block, 1, |
378 | (ulong *)block_buffer); | |
379 | if (res == 1) | |
380 | { | |
381 | p = (struct partition_block *)block_buffer; | |
382 | if (p->id == AMIGA_ID_PART) | |
383 | { | |
384 | PRINTF("PART block suspect at 0x%x, checking checksum\n",block); | |
385 | if (sum_block((struct block_header *)p) == 0) | |
386 | { | |
387 | printf("%-4d ", i); i++; | |
388 | print_part_info(p); | |
389 | block = p->next; | |
390 | } | |
391 | } else block = 0xFFFFFFFF; | |
392 | } else block = 0xFFFFFFFF; | |
393 | } | |
394 | ||
395 | boot = get_bootcode(dev_desc); | |
396 | if (boot) | |
397 | { | |
398 | printf("Disk is bootable\n"); | |
399 | } | |
400 | } | |
401 | ||
402 | #endif |