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Commit | Line | Data |
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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 | * | |
1a459660 | 6 | * SPDX-License-Identifier: GPL-2.0+ |
c7de829c WD |
7 | */ |
8 | #include <common.h> | |
9 | #include <command.h> | |
10 | #include <ide.h> | |
c7de829c WD |
11 | #include "part_amiga.h" |
12 | ||
2c1af9dc | 13 | #ifdef HAVE_BLOCK_DEVICE |
c7de829c WD |
14 | |
15 | #undef AMIGA_DEBUG | |
16 | ||
17 | #ifdef AMIGA_DEBUG | |
18 | #define PRINTF(fmt, args...) printf(fmt ,##args) | |
19 | #else | |
20 | #define PRINTF(fmt, args...) | |
21 | #endif | |
22 | ||
23 | struct block_header | |
24 | { | |
25 | u32 id; | |
26 | u32 summed_longs; | |
27 | s32 chk_sum; | |
28 | }; | |
29 | ||
30 | static unsigned char block_buffer[DEFAULT_SECTOR_SIZE]; | |
31 | static struct rigid_disk_block rdb = {0}; | |
32 | static struct bootcode_block bootcode = {0}; | |
33 | ||
34 | /* | |
35 | * Copy a bcpl to a c string | |
36 | */ | |
37 | static void bcpl_strcpy(char *to, char *from) | |
38 | { | |
39 | int len = *from++; | |
40 | ||
41 | while (len) | |
42 | { | |
43 | *to++ = *from++; | |
44 | len--; | |
45 | } | |
46 | *to = 0; | |
47 | } | |
48 | ||
49 | /* | |
50 | * Print a BCPL String. BCPL strings start with a byte with the length | |
51 | * of the string, and don't contain a terminating nul character | |
52 | */ | |
53 | static void bstr_print(char *string) | |
54 | { | |
55 | int len = *string++; | |
56 | char buffer[256]; | |
57 | int i; | |
8bde7f77 | 58 | |
c7de829c WD |
59 | i = 0; |
60 | while (len) | |
61 | { | |
62 | buffer[i++] = *string++; | |
63 | len--; | |
64 | } | |
65 | ||
66 | buffer[i] = 0; | |
67 | printf("%-10s", buffer); | |
68 | } | |
69 | ||
70 | /* | |
71 | * Sum a block. The checksum of a block must end up at zero | |
72 | * to be valid. The chk_sum field is selected so that adding | |
73 | * it yields zero. | |
74 | */ | |
75 | int sum_block(struct block_header *header) | |
76 | { | |
77 | s32 *block = (s32 *)header; | |
78 | u32 i; | |
79 | s32 sum = 0; | |
80 | ||
81 | for (i = 0; i < header->summed_longs; i++) | |
82 | sum += *block++; | |
8bde7f77 | 83 | |
c7de829c WD |
84 | return (sum != 0); |
85 | } | |
86 | ||
87 | /* | |
88 | * Print an AmigaOS disk type. Disk types are a four-byte identifier | |
89 | * describing the file system. They are usually written as a three-letter | |
90 | * word followed by a backslash and a version number. For example, | |
91 | * DOS\0 would be the original file system. SFS\0 would be SmartFileSystem. | |
92 | * DOS\1 is FFS. | |
93 | */ | |
94 | static void print_disk_type(u32 disk_type) | |
95 | { | |
96 | char buffer[6]; | |
97 | buffer[0] = (disk_type & 0xFF000000)>>24; | |
98 | buffer[1] = (disk_type & 0x00FF0000)>>16; | |
99 | buffer[2] = (disk_type & 0x0000FF00)>>8; | |
100 | buffer[3] = '\\'; | |
101 | buffer[4] = (disk_type & 0x000000FF) + '0'; | |
102 | buffer[5] = 0; | |
103 | printf("%s", buffer); | |
104 | } | |
105 | ||
106 | /* | |
107 | * Print the info contained within the given partition block | |
108 | */ | |
109 | static void print_part_info(struct partition_block *p) | |
110 | { | |
111 | struct amiga_part_geometry *g; | |
8bde7f77 | 112 | |
c7de829c WD |
113 | g = (struct amiga_part_geometry *)&(p->environment); |
114 | ||
115 | bstr_print(p->drive_name); | |
8bde7f77 WD |
116 | printf("%6d\t%6d\t", |
117 | g->low_cyl * g->block_per_track * g->surfaces , | |
c7de829c WD |
118 | (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1); |
119 | print_disk_type(g->dos_type); | |
120 | printf("\t%5d\n", g->boot_priority); | |
121 | } | |
122 | ||
123 | /* | |
124 | * Search for the Rigid Disk Block. The rigid disk block is required | |
125 | * to be within the first 16 blocks of a drive, needs to have | |
126 | * the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid | |
127 | * sum-to-zero checksum | |
128 | */ | |
4101f687 | 129 | struct rigid_disk_block *get_rdisk(struct blk_desc *dev_desc) |
c7de829c WD |
130 | { |
131 | int i; | |
132 | int limit; | |
133 | char *s; | |
134 | ||
00caae6d | 135 | s = env_get("amiga_scanlimit"); |
c7de829c | 136 | if (s) |
75eb82ec | 137 | limit = simple_strtoul(s, NULL, 10); |
c7de829c WD |
138 | else |
139 | limit = AMIGA_BLOCK_LIMIT; | |
140 | ||
141 | for (i=0; i<limit; i++) | |
142 | { | |
2a981dc2 | 143 | ulong res = blk_dread(dev_desc, i, 1, (ulong *)block_buffer); |
c7de829c WD |
144 | if (res == 1) |
145 | { | |
146 | struct rigid_disk_block *trdb = (struct rigid_disk_block *)block_buffer; | |
147 | if (trdb->id == AMIGA_ID_RDISK) | |
148 | { | |
149 | PRINTF("Rigid disk block suspect at %d, checking checksum\n",i); | |
150 | if (sum_block((struct block_header *)block_buffer) == 0) | |
151 | { | |
152 | PRINTF("FOUND\n"); | |
153 | memcpy(&rdb, trdb, sizeof(struct rigid_disk_block)); | |
154 | return (struct rigid_disk_block *)&rdb; | |
155 | } | |
156 | } | |
157 | } | |
158 | } | |
159 | PRINTF("Done scanning, no RDB found\n"); | |
160 | return NULL; | |
161 | } | |
162 | ||
8bde7f77 | 163 | /* |
c7de829c WD |
164 | * Search for boot code |
165 | * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the | |
166 | * Ridgid disk block | |
167 | */ | |
168 | ||
4101f687 | 169 | struct bootcode_block *get_bootcode(struct blk_desc *dev_desc) |
c7de829c WD |
170 | { |
171 | int i; | |
172 | int limit; | |
173 | char *s; | |
174 | ||
00caae6d | 175 | s = env_get("amiga_scanlimit"); |
c7de829c | 176 | if (s) |
75eb82ec | 177 | limit = simple_strtoul(s, NULL, 10); |
c7de829c WD |
178 | else |
179 | limit = AMIGA_BLOCK_LIMIT; | |
180 | ||
181 | PRINTF("Scanning for BOOT from 0 to %d\n", limit); | |
182 | ||
183 | for (i = 0; i < limit; i++) | |
184 | { | |
2a981dc2 | 185 | ulong res = blk_dread(dev_desc, i, 1, (ulong *)block_buffer); |
c7de829c WD |
186 | if (res == 1) |
187 | { | |
188 | struct bootcode_block *boot = (struct bootcode_block *)block_buffer; | |
189 | if (boot->id == AMIGA_ID_BOOT) | |
190 | { | |
191 | PRINTF("BOOT block at %d, checking checksum\n", i); | |
192 | if (sum_block((struct block_header *)block_buffer) == 0) | |
193 | { | |
194 | PRINTF("Found valid bootcode block\n"); | |
195 | memcpy(&bootcode, boot, sizeof(struct bootcode_block)); | |
196 | return &bootcode; | |
197 | } | |
198 | } | |
199 | } | |
200 | } | |
201 | ||
202 | PRINTF("No boot code found on disk\n"); | |
203 | return 0; | |
204 | } | |
205 | ||
8bde7f77 | 206 | /* |
c7de829c WD |
207 | * Test if the given partition has an Amiga partition table/Rigid |
208 | * Disk block | |
209 | */ | |
084bf4c2 | 210 | static int part_test_amiga(struct blk_desc *dev_desc) |
c7de829c WD |
211 | { |
212 | struct rigid_disk_block *rdb; | |
213 | struct bootcode_block *bootcode; | |
214 | ||
084bf4c2 | 215 | PRINTF("part_test_amiga: Testing for an Amiga RDB partition\n"); |
8bde7f77 | 216 | |
c7de829c WD |
217 | rdb = get_rdisk(dev_desc); |
218 | if (rdb) | |
219 | { | |
220 | bootcode = get_bootcode(dev_desc); | |
221 | if (bootcode) | |
084bf4c2 | 222 | PRINTF("part_test_amiga: bootable Amiga disk\n"); |
c7de829c | 223 | else |
084bf4c2 | 224 | PRINTF("part_test_amiga: non-bootable Amiga disk\n"); |
c7de829c WD |
225 | |
226 | return 0; | |
227 | } | |
8bde7f77 | 228 | else |
c7de829c | 229 | { |
084bf4c2 | 230 | PRINTF("part_test_amiga: no RDB found\n"); |
c7de829c WD |
231 | return -1; |
232 | } | |
233 | ||
234 | } | |
235 | ||
8bde7f77 | 236 | /* |
c7de829c WD |
237 | * Find partition number partnum on the given drive. |
238 | */ | |
4101f687 SG |
239 | static struct partition_block *find_partition(struct blk_desc *dev_desc, |
240 | int partnum) | |
c7de829c WD |
241 | { |
242 | struct rigid_disk_block *rdb; | |
243 | struct partition_block *p; | |
244 | u32 block; | |
245 | ||
246 | PRINTF("Trying to find partition block %d\n", partnum); | |
247 | rdb = get_rdisk(dev_desc); | |
8bde7f77 | 248 | if (!rdb) |
c7de829c WD |
249 | { |
250 | PRINTF("find_partition: no rdb found\n"); | |
251 | return NULL; | |
252 | } | |
8bde7f77 | 253 | |
c7de829c WD |
254 | PRINTF("find_partition: Scanning partition list\n"); |
255 | ||
256 | block = rdb->partition_list; | |
257 | PRINTF("find_partition: partition list at 0x%x\n", block); | |
258 | ||
259 | while (block != 0xFFFFFFFF) | |
260 | { | |
2a981dc2 | 261 | ulong res = blk_dread(dev_desc, block, 1, (ulong *)block_buffer); |
c7de829c WD |
262 | if (res == 1) |
263 | { | |
264 | p = (struct partition_block *)block_buffer; | |
265 | if (p->id == AMIGA_ID_PART) | |
266 | { | |
267 | PRINTF("PART block suspect at 0x%x, checking checksum\n",block); | |
268 | if (sum_block((struct block_header *)p) == 0) | |
269 | { | |
270 | if (partnum == 0) break; | |
8bde7f77 | 271 | else |
c7de829c WD |
272 | { |
273 | partnum--; | |
274 | block = p->next; | |
275 | } | |
276 | } | |
277 | } else block = 0xFFFFFFFF; | |
278 | } else block = 0xFFFFFFFF; | |
279 | } | |
280 | ||
8bde7f77 | 281 | if (block == 0xFFFFFFFF) |
c7de829c WD |
282 | { |
283 | PRINTF("PART block not found\n"); | |
284 | return NULL; | |
285 | } | |
286 | ||
287 | return (struct partition_block *)block_buffer; | |
288 | } | |
289 | ||
8bde7f77 | 290 | /* |
c7de829c WD |
291 | * Get info about a partition |
292 | */ | |
3e8bd469 | 293 | static int part_get_info_amiga(struct blk_desc *dev_desc, int part, |
96e5b03c | 294 | disk_partition_t *info) |
c7de829c WD |
295 | { |
296 | struct partition_block *p = find_partition(dev_desc, part-1); | |
297 | struct amiga_part_geometry *g; | |
298 | u32 disk_type; | |
299 | ||
300 | if (!p) return -1; | |
301 | ||
302 | g = (struct amiga_part_geometry *)&(p->environment); | |
303 | info->start = g->low_cyl * g->block_per_track * g->surfaces; | |
304 | info->size = (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1; | |
305 | info->blksz = rdb.block_bytes; | |
95a6f9df | 306 | bcpl_strcpy((char *)info->name, p->drive_name); |
8bde7f77 | 307 | |
c7de829c WD |
308 | |
309 | disk_type = g->dos_type; | |
310 | ||
311 | info->type[0] = (disk_type & 0xFF000000)>>24; | |
312 | info->type[1] = (disk_type & 0x00FF0000)>>16; | |
313 | info->type[2] = (disk_type & 0x0000FF00)>>8; | |
314 | info->type[3] = '\\'; | |
315 | info->type[4] = (disk_type & 0x000000FF) + '0'; | |
316 | info->type[5] = 0; | |
8bde7f77 | 317 | |
c7de829c WD |
318 | return 0; |
319 | } | |
320 | ||
084bf4c2 | 321 | static void part_print_amiga(struct blk_desc *dev_desc) |
8bde7f77 | 322 | { |
c7de829c WD |
323 | struct rigid_disk_block *rdb; |
324 | struct bootcode_block *boot; | |
325 | struct partition_block *p; | |
326 | u32 block; | |
327 | int i = 1; | |
328 | ||
329 | rdb = get_rdisk(dev_desc); | |
8bde7f77 | 330 | if (!rdb) |
c7de829c | 331 | { |
084bf4c2 | 332 | PRINTF("part_print_amiga: no rdb found\n"); |
c7de829c WD |
333 | return; |
334 | } | |
8bde7f77 | 335 | |
084bf4c2 | 336 | PRINTF("part_print_amiga: Scanning partition list\n"); |
c7de829c WD |
337 | |
338 | block = rdb->partition_list; | |
084bf4c2 | 339 | PRINTF("part_print_amiga: partition list at 0x%x\n", block); |
c7de829c WD |
340 | |
341 | printf("Summary: DiskBlockSize: %d\n" | |
342 | " Cylinders : %d\n" | |
343 | " Sectors/Track: %d\n" | |
344 | " Heads : %d\n\n", | |
345 | rdb->block_bytes, rdb->cylinders, rdb->sectors, | |
346 | rdb->heads); | |
347 | ||
348 | printf(" First Num. \n" | |
349 | "Nr. Part. Name Block Block Type Boot Priority\n"); | |
350 | ||
351 | while (block != 0xFFFFFFFF) | |
352 | { | |
353 | ulong res; | |
354 | ||
355 | PRINTF("Trying to load block #0x%X\n", block); | |
8bde7f77 | 356 | |
2a981dc2 | 357 | res = blk_dread(dev_desc, block, 1, (ulong *)block_buffer); |
c7de829c WD |
358 | if (res == 1) |
359 | { | |
360 | p = (struct partition_block *)block_buffer; | |
361 | if (p->id == AMIGA_ID_PART) | |
362 | { | |
363 | PRINTF("PART block suspect at 0x%x, checking checksum\n",block); | |
364 | if (sum_block((struct block_header *)p) == 0) | |
365 | { | |
366 | printf("%-4d ", i); i++; | |
367 | print_part_info(p); | |
368 | block = p->next; | |
369 | } | |
370 | } else block = 0xFFFFFFFF; | |
371 | } else block = 0xFFFFFFFF; | |
372 | } | |
373 | ||
374 | boot = get_bootcode(dev_desc); | |
375 | if (boot) | |
376 | { | |
377 | printf("Disk is bootable\n"); | |
378 | } | |
379 | } | |
380 | ||
96e5b03c SG |
381 | U_BOOT_PART_TYPE(amiga) = { |
382 | .name = "AMIGA", | |
383 | .part_type = PART_TYPE_AMIGA, | |
87b8530f | 384 | .max_entries = AMIGA_ENTRY_NUMBERS, |
3e8bd469 | 385 | .get_info = part_get_info_amiga, |
084bf4c2 SG |
386 | .print = part_print_amiga, |
387 | .test = part_test_amiga, | |
96e5b03c SG |
388 | }; |
389 | ||
c7de829c | 390 | #endif |