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wdenkc7de8292002-11-19 11:04:11 +00001/*
2 * (C) Copyright 2001
wdenk8bde7f72003-06-27 21:31:46 +00003 * Hans-Joerg Frieden, Hyperion Entertainment
wdenkc7de8292002-11-19 11:04:11 +00004 * 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>
wdenkc7de8292002-11-19 11:04:11 +000027#include "part_amiga.h"
28
Stephen Warren2c1af9d2013-02-28 15:03:46 +000029#ifdef HAVE_BLOCK_DEVICE
wdenkc7de8292002-11-19 11:04:11 +000030
31#undef AMIGA_DEBUG
32
33#ifdef AMIGA_DEBUG
34#define PRINTF(fmt, args...) printf(fmt ,##args)
35#else
36#define PRINTF(fmt, args...)
37#endif
38
39struct block_header
40{
41 u32 id;
42 u32 summed_longs;
43 s32 chk_sum;
44};
45
46static unsigned char block_buffer[DEFAULT_SECTOR_SIZE];
47static struct rigid_disk_block rdb = {0};
48static struct bootcode_block bootcode = {0};
49
50/*
51 * Copy a bcpl to a c string
52 */
53static void bcpl_strcpy(char *to, char *from)
54{
55 int len = *from++;
56
57 while (len)
58 {
59 *to++ = *from++;
60 len--;
61 }
62 *to = 0;
63}
64
65/*
66 * Print a BCPL String. BCPL strings start with a byte with the length
67 * of the string, and don't contain a terminating nul character
68 */
69static void bstr_print(char *string)
70{
71 int len = *string++;
72 char buffer[256];
73 int i;
wdenk8bde7f72003-06-27 21:31:46 +000074
wdenkc7de8292002-11-19 11:04:11 +000075 i = 0;
76 while (len)
77 {
78 buffer[i++] = *string++;
79 len--;
80 }
81
82 buffer[i] = 0;
83 printf("%-10s", buffer);
84}
85
86/*
87 * Sum a block. The checksum of a block must end up at zero
88 * to be valid. The chk_sum field is selected so that adding
89 * it yields zero.
90 */
91int sum_block(struct block_header *header)
92{
93 s32 *block = (s32 *)header;
94 u32 i;
95 s32 sum = 0;
96
97 for (i = 0; i < header->summed_longs; i++)
98 sum += *block++;
wdenk8bde7f72003-06-27 21:31:46 +000099
wdenkc7de8292002-11-19 11:04:11 +0000100 return (sum != 0);
101}
102
103/*
104 * Print an AmigaOS disk type. Disk types are a four-byte identifier
105 * describing the file system. They are usually written as a three-letter
106 * word followed by a backslash and a version number. For example,
107 * DOS\0 would be the original file system. SFS\0 would be SmartFileSystem.
108 * DOS\1 is FFS.
109 */
110static void print_disk_type(u32 disk_type)
111{
112 char buffer[6];
113 buffer[0] = (disk_type & 0xFF000000)>>24;
114 buffer[1] = (disk_type & 0x00FF0000)>>16;
115 buffer[2] = (disk_type & 0x0000FF00)>>8;
116 buffer[3] = '\\';
117 buffer[4] = (disk_type & 0x000000FF) + '0';
118 buffer[5] = 0;
119 printf("%s", buffer);
120}
121
122/*
123 * Print the info contained within the given partition block
124 */
125static void print_part_info(struct partition_block *p)
126{
127 struct amiga_part_geometry *g;
wdenk8bde7f72003-06-27 21:31:46 +0000128
wdenkc7de8292002-11-19 11:04:11 +0000129 g = (struct amiga_part_geometry *)&(p->environment);
130
131 bstr_print(p->drive_name);
wdenk8bde7f72003-06-27 21:31:46 +0000132 printf("%6d\t%6d\t",
133 g->low_cyl * g->block_per_track * g->surfaces ,
wdenkc7de8292002-11-19 11:04:11 +0000134 (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1);
135 print_disk_type(g->dos_type);
136 printf("\t%5d\n", g->boot_priority);
137}
138
139/*
140 * Search for the Rigid Disk Block. The rigid disk block is required
141 * to be within the first 16 blocks of a drive, needs to have
142 * the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid
143 * sum-to-zero checksum
144 */
145struct rigid_disk_block *get_rdisk(block_dev_desc_t *dev_desc)
146{
147 int i;
148 int limit;
149 char *s;
150
151 s = getenv("amiga_scanlimit");
152 if (s)
unsik Kim75eb82e2009-02-25 11:31:24 +0900153 limit = simple_strtoul(s, NULL, 10);
wdenkc7de8292002-11-19 11:04:11 +0000154 else
155 limit = AMIGA_BLOCK_LIMIT;
156
157 for (i=0; i<limit; i++)
158 {
159 ulong res = dev_desc->block_read(dev_desc->dev, i, 1,
160 (ulong *)block_buffer);
161 if (res == 1)
162 {
163 struct rigid_disk_block *trdb = (struct rigid_disk_block *)block_buffer;
164 if (trdb->id == AMIGA_ID_RDISK)
165 {
166 PRINTF("Rigid disk block suspect at %d, checking checksum\n",i);
167 if (sum_block((struct block_header *)block_buffer) == 0)
168 {
169 PRINTF("FOUND\n");
170 memcpy(&rdb, trdb, sizeof(struct rigid_disk_block));
171 return (struct rigid_disk_block *)&rdb;
172 }
173 }
174 }
175 }
176 PRINTF("Done scanning, no RDB found\n");
177 return NULL;
178}
179
wdenk8bde7f72003-06-27 21:31:46 +0000180/*
wdenkc7de8292002-11-19 11:04:11 +0000181 * Search for boot code
182 * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the
183 * Ridgid disk block
184 */
185
186struct bootcode_block *get_bootcode(block_dev_desc_t *dev_desc)
187{
188 int i;
189 int limit;
190 char *s;
191
192 s = getenv("amiga_scanlimit");
193 if (s)
unsik Kim75eb82e2009-02-25 11:31:24 +0900194 limit = simple_strtoul(s, NULL, 10);
wdenkc7de8292002-11-19 11:04:11 +0000195 else
196 limit = AMIGA_BLOCK_LIMIT;
197
198 PRINTF("Scanning for BOOT from 0 to %d\n", limit);
199
200 for (i = 0; i < limit; i++)
201 {
202 ulong res = dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)block_buffer);
203 if (res == 1)
204 {
205 struct bootcode_block *boot = (struct bootcode_block *)block_buffer;
206 if (boot->id == AMIGA_ID_BOOT)
207 {
208 PRINTF("BOOT block at %d, checking checksum\n", i);
209 if (sum_block((struct block_header *)block_buffer) == 0)
210 {
211 PRINTF("Found valid bootcode block\n");
212 memcpy(&bootcode, boot, sizeof(struct bootcode_block));
213 return &bootcode;
214 }
215 }
216 }
217 }
218
219 PRINTF("No boot code found on disk\n");
220 return 0;
221}
222
wdenk8bde7f72003-06-27 21:31:46 +0000223/*
wdenkc7de8292002-11-19 11:04:11 +0000224 * Test if the given partition has an Amiga partition table/Rigid
225 * Disk block
226 */
227int test_part_amiga(block_dev_desc_t *dev_desc)
228{
229 struct rigid_disk_block *rdb;
230 struct bootcode_block *bootcode;
231
232 PRINTF("test_part_amiga: Testing for an Amiga RDB partition\n");
wdenk8bde7f72003-06-27 21:31:46 +0000233
wdenkc7de8292002-11-19 11:04:11 +0000234 rdb = get_rdisk(dev_desc);
235 if (rdb)
236 {
237 bootcode = get_bootcode(dev_desc);
238 if (bootcode)
239 PRINTF("test_part_amiga: bootable Amiga disk\n");
240 else
241 PRINTF("test_part_amiga: non-bootable Amiga disk\n");
242
243 return 0;
244 }
wdenk8bde7f72003-06-27 21:31:46 +0000245 else
wdenkc7de8292002-11-19 11:04:11 +0000246 {
247 PRINTF("test_part_amiga: no RDB found\n");
248 return -1;
249 }
250
251}
252
wdenk8bde7f72003-06-27 21:31:46 +0000253/*
wdenkc7de8292002-11-19 11:04:11 +0000254 * Find partition number partnum on the given drive.
255 */
256static struct partition_block *find_partition(block_dev_desc_t *dev_desc, int partnum)
257{
258 struct rigid_disk_block *rdb;
259 struct partition_block *p;
260 u32 block;
261
262 PRINTF("Trying to find partition block %d\n", partnum);
263 rdb = get_rdisk(dev_desc);
wdenk8bde7f72003-06-27 21:31:46 +0000264 if (!rdb)
wdenkc7de8292002-11-19 11:04:11 +0000265 {
266 PRINTF("find_partition: no rdb found\n");
267 return NULL;
268 }
wdenk8bde7f72003-06-27 21:31:46 +0000269
wdenkc7de8292002-11-19 11:04:11 +0000270 PRINTF("find_partition: Scanning partition list\n");
271
272 block = rdb->partition_list;
273 PRINTF("find_partition: partition list at 0x%x\n", block);
274
275 while (block != 0xFFFFFFFF)
276 {
277 ulong res = dev_desc->block_read(dev_desc->dev, block, 1,
278 (ulong *)block_buffer);
279 if (res == 1)
280 {
281 p = (struct partition_block *)block_buffer;
282 if (p->id == AMIGA_ID_PART)
283 {
284 PRINTF("PART block suspect at 0x%x, checking checksum\n",block);
285 if (sum_block((struct block_header *)p) == 0)
286 {
287 if (partnum == 0) break;
wdenk8bde7f72003-06-27 21:31:46 +0000288 else
wdenkc7de8292002-11-19 11:04:11 +0000289 {
290 partnum--;
291 block = p->next;
292 }
293 }
294 } else block = 0xFFFFFFFF;
295 } else block = 0xFFFFFFFF;
296 }
297
wdenk8bde7f72003-06-27 21:31:46 +0000298 if (block == 0xFFFFFFFF)
wdenkc7de8292002-11-19 11:04:11 +0000299 {
300 PRINTF("PART block not found\n");
301 return NULL;
302 }
303
304 return (struct partition_block *)block_buffer;
305}
306
wdenk8bde7f72003-06-27 21:31:46 +0000307/*
wdenkc7de8292002-11-19 11:04:11 +0000308 * Get info about a partition
309 */
310int get_partition_info_amiga (block_dev_desc_t *dev_desc, int part, disk_partition_t *info)
311{
312 struct partition_block *p = find_partition(dev_desc, part-1);
313 struct amiga_part_geometry *g;
314 u32 disk_type;
315
316 if (!p) return -1;
317
318 g = (struct amiga_part_geometry *)&(p->environment);
319 info->start = g->low_cyl * g->block_per_track * g->surfaces;
320 info->size = (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1;
321 info->blksz = rdb.block_bytes;
322 bcpl_strcpy(info->name, p->drive_name);
wdenk8bde7f72003-06-27 21:31:46 +0000323
wdenkc7de8292002-11-19 11:04:11 +0000324
325 disk_type = g->dos_type;
326
327 info->type[0] = (disk_type & 0xFF000000)>>24;
328 info->type[1] = (disk_type & 0x00FF0000)>>16;
329 info->type[2] = (disk_type & 0x0000FF00)>>8;
330 info->type[3] = '\\';
331 info->type[4] = (disk_type & 0x000000FF) + '0';
332 info->type[5] = 0;
wdenk8bde7f72003-06-27 21:31:46 +0000333
wdenkc7de8292002-11-19 11:04:11 +0000334 return 0;
335}
336
337void print_part_amiga (block_dev_desc_t *dev_desc)
wdenk8bde7f72003-06-27 21:31:46 +0000338{
wdenkc7de8292002-11-19 11:04:11 +0000339 struct rigid_disk_block *rdb;
340 struct bootcode_block *boot;
341 struct partition_block *p;
342 u32 block;
343 int i = 1;
344
345 rdb = get_rdisk(dev_desc);
wdenk8bde7f72003-06-27 21:31:46 +0000346 if (!rdb)
wdenkc7de8292002-11-19 11:04:11 +0000347 {
348 PRINTF("print_part_amiga: no rdb found\n");
349 return;
350 }
wdenk8bde7f72003-06-27 21:31:46 +0000351
wdenkc7de8292002-11-19 11:04:11 +0000352 PRINTF("print_part_amiga: Scanning partition list\n");
353
354 block = rdb->partition_list;
355 PRINTF("print_part_amiga: partition list at 0x%x\n", block);
356
357 printf("Summary: DiskBlockSize: %d\n"
358 " Cylinders : %d\n"
359 " Sectors/Track: %d\n"
360 " Heads : %d\n\n",
361 rdb->block_bytes, rdb->cylinders, rdb->sectors,
362 rdb->heads);
363
364 printf(" First Num. \n"
365 "Nr. Part. Name Block Block Type Boot Priority\n");
366
367 while (block != 0xFFFFFFFF)
368 {
369 ulong res;
370
371 PRINTF("Trying to load block #0x%X\n", block);
wdenk8bde7f72003-06-27 21:31:46 +0000372
wdenkc7de8292002-11-19 11:04:11 +0000373 res = dev_desc->block_read(dev_desc->dev, block, 1,
374 (ulong *)block_buffer);
375 if (res == 1)
376 {
377 p = (struct partition_block *)block_buffer;
378 if (p->id == AMIGA_ID_PART)
379 {
380 PRINTF("PART block suspect at 0x%x, checking checksum\n",block);
381 if (sum_block((struct block_header *)p) == 0)
382 {
383 printf("%-4d ", i); i++;
384 print_part_info(p);
385 block = p->next;
386 }
387 } else block = 0xFFFFFFFF;
388 } else block = 0xFFFFFFFF;
389 }
390
391 boot = get_bootcode(dev_desc);
392 if (boot)
393 {
394 printf("Disk is bootable\n");
395 }
396}
397
398#endif