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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
c7de829c WD |
2 | /* |
3 | * (C) Copyright 2001 | |
8bde7f77 | 4 | * Hans-Joerg Frieden, Hyperion Entertainment |
c7de829c | 5 | * [email protected] |
c7de829c | 6 | */ |
c7de829c | 7 | #include <command.h> |
7b51b576 | 8 | #include <env.h> |
c7de829c | 9 | #include <ide.h> |
c7de829c | 10 | #include "part_amiga.h" |
e6f6f9e6 | 11 | #include <part.h> |
03de305e | 12 | #include <vsprintf.h> |
c7de829c | 13 | |
c7de829c WD |
14 | #undef AMIGA_DEBUG |
15 | ||
16 | #ifdef AMIGA_DEBUG | |
17 | #define PRINTF(fmt, args...) printf(fmt ,##args) | |
18 | #else | |
19 | #define PRINTF(fmt, args...) | |
20 | #endif | |
21 | ||
22 | struct block_header | |
23 | { | |
24 | u32 id; | |
25 | u32 summed_longs; | |
26 | s32 chk_sum; | |
27 | }; | |
28 | ||
29 | static unsigned char block_buffer[DEFAULT_SECTOR_SIZE]; | |
30 | static struct rigid_disk_block rdb = {0}; | |
31 | static struct bootcode_block bootcode = {0}; | |
32 | ||
33 | /* | |
34 | * Copy a bcpl to a c string | |
35 | */ | |
36 | static void bcpl_strcpy(char *to, char *from) | |
37 | { | |
38 | int len = *from++; | |
39 | ||
40 | while (len) | |
41 | { | |
42 | *to++ = *from++; | |
43 | len--; | |
44 | } | |
45 | *to = 0; | |
46 | } | |
47 | ||
48 | /* | |
49 | * Print a BCPL String. BCPL strings start with a byte with the length | |
50 | * of the string, and don't contain a terminating nul character | |
51 | */ | |
52 | static void bstr_print(char *string) | |
53 | { | |
54 | int len = *string++; | |
55 | char buffer[256]; | |
56 | int i; | |
8bde7f77 | 57 | |
c7de829c WD |
58 | i = 0; |
59 | while (len) | |
60 | { | |
61 | buffer[i++] = *string++; | |
62 | len--; | |
63 | } | |
64 | ||
65 | buffer[i] = 0; | |
66 | printf("%-10s", buffer); | |
67 | } | |
68 | ||
69 | /* | |
70 | * Sum a block. The checksum of a block must end up at zero | |
71 | * to be valid. The chk_sum field is selected so that adding | |
72 | * it yields zero. | |
73 | */ | |
74 | int sum_block(struct block_header *header) | |
75 | { | |
76 | s32 *block = (s32 *)header; | |
77 | u32 i; | |
78 | s32 sum = 0; | |
79 | ||
80 | for (i = 0; i < header->summed_longs; i++) | |
81 | sum += *block++; | |
8bde7f77 | 82 | |
c7de829c WD |
83 | return (sum != 0); |
84 | } | |
85 | ||
86 | /* | |
87 | * Print an AmigaOS disk type. Disk types are a four-byte identifier | |
88 | * describing the file system. They are usually written as a three-letter | |
89 | * word followed by a backslash and a version number. For example, | |
90 | * DOS\0 would be the original file system. SFS\0 would be SmartFileSystem. | |
91 | * DOS\1 is FFS. | |
92 | */ | |
93 | static void print_disk_type(u32 disk_type) | |
94 | { | |
95 | char buffer[6]; | |
96 | buffer[0] = (disk_type & 0xFF000000)>>24; | |
97 | buffer[1] = (disk_type & 0x00FF0000)>>16; | |
98 | buffer[2] = (disk_type & 0x0000FF00)>>8; | |
99 | buffer[3] = '\\'; | |
100 | buffer[4] = (disk_type & 0x000000FF) + '0'; | |
101 | buffer[5] = 0; | |
102 | printf("%s", buffer); | |
103 | } | |
104 | ||
105 | /* | |
106 | * Print the info contained within the given partition block | |
107 | */ | |
108 | static void print_part_info(struct partition_block *p) | |
109 | { | |
110 | struct amiga_part_geometry *g; | |
8bde7f77 | 111 | |
c7de829c WD |
112 | g = (struct amiga_part_geometry *)&(p->environment); |
113 | ||
114 | bstr_print(p->drive_name); | |
8bde7f77 WD |
115 | printf("%6d\t%6d\t", |
116 | g->low_cyl * g->block_per_track * g->surfaces , | |
c7de829c WD |
117 | (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1); |
118 | print_disk_type(g->dos_type); | |
119 | printf("\t%5d\n", g->boot_priority); | |
120 | } | |
121 | ||
122 | /* | |
123 | * Search for the Rigid Disk Block. The rigid disk block is required | |
124 | * to be within the first 16 blocks of a drive, needs to have | |
125 | * the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid | |
126 | * sum-to-zero checksum | |
127 | */ | |
3557e8d2 | 128 | struct rigid_disk_block *get_rdisk(struct blk_desc *desc) |
c7de829c WD |
129 | { |
130 | int i; | |
131 | int limit; | |
132 | char *s; | |
133 | ||
00caae6d | 134 | s = env_get("amiga_scanlimit"); |
c7de829c | 135 | if (s) |
0b1284eb | 136 | limit = dectoul(s, NULL); |
c7de829c WD |
137 | else |
138 | limit = AMIGA_BLOCK_LIMIT; | |
139 | ||
140 | for (i=0; i<limit; i++) | |
141 | { | |
3557e8d2 | 142 | ulong res = blk_dread(desc, i, 1, (ulong *)block_buffer); |
c7de829c WD |
143 | if (res == 1) |
144 | { | |
145 | struct rigid_disk_block *trdb = (struct rigid_disk_block *)block_buffer; | |
146 | if (trdb->id == AMIGA_ID_RDISK) | |
147 | { | |
148 | PRINTF("Rigid disk block suspect at %d, checking checksum\n",i); | |
149 | if (sum_block((struct block_header *)block_buffer) == 0) | |
150 | { | |
151 | PRINTF("FOUND\n"); | |
152 | memcpy(&rdb, trdb, sizeof(struct rigid_disk_block)); | |
153 | return (struct rigid_disk_block *)&rdb; | |
154 | } | |
155 | } | |
156 | } | |
157 | } | |
158 | PRINTF("Done scanning, no RDB found\n"); | |
159 | return NULL; | |
160 | } | |
161 | ||
8bde7f77 | 162 | /* |
c7de829c WD |
163 | * Search for boot code |
164 | * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the | |
165 | * Ridgid disk block | |
166 | */ | |
167 | ||
3557e8d2 | 168 | struct bootcode_block *get_bootcode(struct blk_desc *desc) |
c7de829c WD |
169 | { |
170 | int i; | |
171 | int limit; | |
172 | char *s; | |
173 | ||
00caae6d | 174 | s = env_get("amiga_scanlimit"); |
c7de829c | 175 | if (s) |
0b1284eb | 176 | limit = dectoul(s, NULL); |
c7de829c WD |
177 | else |
178 | limit = AMIGA_BLOCK_LIMIT; | |
179 | ||
180 | PRINTF("Scanning for BOOT from 0 to %d\n", limit); | |
181 | ||
182 | for (i = 0; i < limit; i++) | |
183 | { | |
3557e8d2 | 184 | ulong res = blk_dread(desc, i, 1, (ulong *)block_buffer); |
c7de829c WD |
185 | if (res == 1) |
186 | { | |
187 | struct bootcode_block *boot = (struct bootcode_block *)block_buffer; | |
188 | if (boot->id == AMIGA_ID_BOOT) | |
189 | { | |
190 | PRINTF("BOOT block at %d, checking checksum\n", i); | |
191 | if (sum_block((struct block_header *)block_buffer) == 0) | |
192 | { | |
193 | PRINTF("Found valid bootcode block\n"); | |
194 | memcpy(&bootcode, boot, sizeof(struct bootcode_block)); | |
195 | return &bootcode; | |
196 | } | |
197 | } | |
198 | } | |
199 | } | |
200 | ||
201 | PRINTF("No boot code found on disk\n"); | |
202 | return 0; | |
203 | } | |
204 | ||
8bde7f77 | 205 | /* |
c7de829c WD |
206 | * Test if the given partition has an Amiga partition table/Rigid |
207 | * Disk block | |
208 | */ | |
3557e8d2 | 209 | static int part_test_amiga(struct blk_desc *desc) |
c7de829c WD |
210 | { |
211 | struct rigid_disk_block *rdb; | |
212 | struct bootcode_block *bootcode; | |
213 | ||
084bf4c2 | 214 | PRINTF("part_test_amiga: Testing for an Amiga RDB partition\n"); |
8bde7f77 | 215 | |
3557e8d2 | 216 | rdb = get_rdisk(desc); |
c7de829c WD |
217 | if (rdb) |
218 | { | |
3557e8d2 | 219 | bootcode = get_bootcode(desc); |
c7de829c | 220 | if (bootcode) |
084bf4c2 | 221 | PRINTF("part_test_amiga: bootable Amiga disk\n"); |
c7de829c | 222 | else |
084bf4c2 | 223 | PRINTF("part_test_amiga: non-bootable Amiga disk\n"); |
c7de829c WD |
224 | |
225 | return 0; | |
226 | } | |
8bde7f77 | 227 | else |
c7de829c | 228 | { |
084bf4c2 | 229 | PRINTF("part_test_amiga: no RDB found\n"); |
c7de829c WD |
230 | return -1; |
231 | } | |
232 | ||
233 | } | |
234 | ||
8bde7f77 | 235 | /* |
c7de829c WD |
236 | * Find partition number partnum on the given drive. |
237 | */ | |
3557e8d2 | 238 | static struct partition_block *find_partition(struct blk_desc *desc, |
4101f687 | 239 | int partnum) |
c7de829c WD |
240 | { |
241 | struct rigid_disk_block *rdb; | |
242 | struct partition_block *p; | |
243 | u32 block; | |
244 | ||
245 | PRINTF("Trying to find partition block %d\n", partnum); | |
3557e8d2 | 246 | rdb = get_rdisk(desc); |
8bde7f77 | 247 | if (!rdb) |
c7de829c WD |
248 | { |
249 | PRINTF("find_partition: no rdb found\n"); | |
250 | return NULL; | |
251 | } | |
8bde7f77 | 252 | |
c7de829c WD |
253 | PRINTF("find_partition: Scanning partition list\n"); |
254 | ||
255 | block = rdb->partition_list; | |
256 | PRINTF("find_partition: partition list at 0x%x\n", block); | |
257 | ||
258 | while (block != 0xFFFFFFFF) | |
259 | { | |
3557e8d2 | 260 | ulong res = blk_dread(desc, block, 1, (ulong *)block_buffer); |
c7de829c WD |
261 | if (res == 1) |
262 | { | |
263 | p = (struct partition_block *)block_buffer; | |
264 | if (p->id == AMIGA_ID_PART) | |
265 | { | |
266 | PRINTF("PART block suspect at 0x%x, checking checksum\n",block); | |
267 | if (sum_block((struct block_header *)p) == 0) | |
268 | { | |
269 | if (partnum == 0) break; | |
8bde7f77 | 270 | else |
c7de829c WD |
271 | { |
272 | partnum--; | |
273 | block = p->next; | |
274 | } | |
275 | } | |
276 | } else block = 0xFFFFFFFF; | |
277 | } else block = 0xFFFFFFFF; | |
278 | } | |
279 | ||
8bde7f77 | 280 | if (block == 0xFFFFFFFF) |
c7de829c WD |
281 | { |
282 | PRINTF("PART block not found\n"); | |
283 | return NULL; | |
284 | } | |
285 | ||
286 | return (struct partition_block *)block_buffer; | |
287 | } | |
288 | ||
8bde7f77 | 289 | /* |
c7de829c WD |
290 | * Get info about a partition |
291 | */ | |
3557e8d2 SG |
292 | static int part_get_info_amiga(struct blk_desc *desc, int part, |
293 | struct disk_partition *info) | |
c7de829c | 294 | { |
3557e8d2 | 295 | struct partition_block *p = find_partition(desc, part - 1); |
c7de829c WD |
296 | struct amiga_part_geometry *g; |
297 | u32 disk_type; | |
298 | ||
299 | if (!p) return -1; | |
300 | ||
301 | g = (struct amiga_part_geometry *)&(p->environment); | |
302 | info->start = g->low_cyl * g->block_per_track * g->surfaces; | |
303 | info->size = (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1; | |
304 | info->blksz = rdb.block_bytes; | |
95a6f9df | 305 | bcpl_strcpy((char *)info->name, p->drive_name); |
8bde7f77 | 306 | |
c7de829c WD |
307 | disk_type = g->dos_type; |
308 | ||
309 | info->type[0] = (disk_type & 0xFF000000)>>24; | |
310 | info->type[1] = (disk_type & 0x00FF0000)>>16; | |
311 | info->type[2] = (disk_type & 0x0000FF00)>>8; | |
312 | info->type[3] = '\\'; | |
313 | info->type[4] = (disk_type & 0x000000FF) + '0'; | |
314 | info->type[5] = 0; | |
8bde7f77 | 315 | |
c7de829c WD |
316 | return 0; |
317 | } | |
318 | ||
3557e8d2 | 319 | static void part_print_amiga(struct blk_desc *desc) |
8bde7f77 | 320 | { |
c7de829c WD |
321 | struct rigid_disk_block *rdb; |
322 | struct bootcode_block *boot; | |
323 | struct partition_block *p; | |
324 | u32 block; | |
325 | int i = 1; | |
326 | ||
3557e8d2 | 327 | rdb = get_rdisk(desc); |
8bde7f77 | 328 | if (!rdb) |
c7de829c | 329 | { |
084bf4c2 | 330 | PRINTF("part_print_amiga: no rdb found\n"); |
c7de829c WD |
331 | return; |
332 | } | |
8bde7f77 | 333 | |
084bf4c2 | 334 | PRINTF("part_print_amiga: Scanning partition list\n"); |
c7de829c WD |
335 | |
336 | block = rdb->partition_list; | |
084bf4c2 | 337 | PRINTF("part_print_amiga: partition list at 0x%x\n", block); |
c7de829c WD |
338 | |
339 | printf("Summary: DiskBlockSize: %d\n" | |
340 | " Cylinders : %d\n" | |
341 | " Sectors/Track: %d\n" | |
342 | " Heads : %d\n\n", | |
343 | rdb->block_bytes, rdb->cylinders, rdb->sectors, | |
344 | rdb->heads); | |
345 | ||
346 | printf(" First Num. \n" | |
347 | "Nr. Part. Name Block Block Type Boot Priority\n"); | |
348 | ||
349 | while (block != 0xFFFFFFFF) | |
350 | { | |
351 | ulong res; | |
352 | ||
353 | PRINTF("Trying to load block #0x%X\n", block); | |
8bde7f77 | 354 | |
3557e8d2 | 355 | res = blk_dread(desc, block, 1, (ulong *)block_buffer); |
c7de829c WD |
356 | if (res == 1) |
357 | { | |
358 | p = (struct partition_block *)block_buffer; | |
359 | if (p->id == AMIGA_ID_PART) | |
360 | { | |
361 | PRINTF("PART block suspect at 0x%x, checking checksum\n",block); | |
362 | if (sum_block((struct block_header *)p) == 0) | |
363 | { | |
364 | printf("%-4d ", i); i++; | |
365 | print_part_info(p); | |
366 | block = p->next; | |
367 | } | |
368 | } else block = 0xFFFFFFFF; | |
369 | } else block = 0xFFFFFFFF; | |
370 | } | |
371 | ||
3557e8d2 | 372 | boot = get_bootcode(desc); |
c7de829c WD |
373 | if (boot) |
374 | { | |
375 | printf("Disk is bootable\n"); | |
376 | } | |
377 | } | |
378 | ||
96e5b03c SG |
379 | U_BOOT_PART_TYPE(amiga) = { |
380 | .name = "AMIGA", | |
381 | .part_type = PART_TYPE_AMIGA, | |
87b8530f | 382 | .max_entries = AMIGA_ENTRY_NUMBERS, |
3e8bd469 | 383 | .get_info = part_get_info_amiga, |
084bf4c2 SG |
384 | .print = part_print_amiga, |
385 | .test = part_test_amiga, | |
96e5b03c | 386 | }; |