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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
wdenk1968e612005-02-24 23:23:29 +000029#if ((CONFIG_COMMANDS & CFG_CMD_IDE) || \
30 (CONFIG_COMMANDS & CFG_CMD_SCSI) || \
31 (CONFIG_COMMANDS & CFG_CMD_USB) || \
32 defined(CONFIG_MMC) || \
33 defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_AMIGA_PARTITION)
wdenkc7de8292002-11-19 11:04:11 +000034
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
43struct block_header
44{
45 u32 id;
46 u32 summed_longs;
47 s32 chk_sum;
48};
49
50static unsigned char block_buffer[DEFAULT_SECTOR_SIZE];
51static struct rigid_disk_block rdb = {0};
52static struct bootcode_block bootcode = {0};
53
54/*
55 * Copy a bcpl to a c string
56 */
57static 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 */
73static void bstr_print(char *string)
74{
75 int len = *string++;
76 char buffer[256];
77 int i;
wdenk8bde7f72003-06-27 21:31:46 +000078
wdenkc7de8292002-11-19 11:04:11 +000079 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 */
95int 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++;
wdenk8bde7f72003-06-27 21:31:46 +0000103
wdenkc7de8292002-11-19 11:04:11 +0000104 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 */
114static 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 */
129static void print_part_info(struct partition_block *p)
130{
131 struct amiga_part_geometry *g;
wdenk8bde7f72003-06-27 21:31:46 +0000132
wdenkc7de8292002-11-19 11:04:11 +0000133 g = (struct amiga_part_geometry *)&(p->environment);
134
135 bstr_print(p->drive_name);
wdenk8bde7f72003-06-27 21:31:46 +0000136 printf("%6d\t%6d\t",
137 g->low_cyl * g->block_per_track * g->surfaces ,
wdenkc7de8292002-11-19 11:04:11 +0000138 (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 */
149struct 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
wdenk8bde7f72003-06-27 21:31:46 +0000184/*
wdenkc7de8292002-11-19 11:04:11 +0000185 * 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
190struct 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
wdenk8bde7f72003-06-27 21:31:46 +0000227/*
wdenkc7de8292002-11-19 11:04:11 +0000228 * Test if the given partition has an Amiga partition table/Rigid
229 * Disk block
230 */
231int 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");
wdenk8bde7f72003-06-27 21:31:46 +0000237
wdenkc7de8292002-11-19 11:04:11 +0000238 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 }
wdenk8bde7f72003-06-27 21:31:46 +0000249 else
wdenkc7de8292002-11-19 11:04:11 +0000250 {
251 PRINTF("test_part_amiga: no RDB found\n");
252 return -1;
253 }
254
255}
256
wdenk8bde7f72003-06-27 21:31:46 +0000257/*
wdenkc7de8292002-11-19 11:04:11 +0000258 * Find partition number partnum on the given drive.
259 */
260static 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);
wdenk8bde7f72003-06-27 21:31:46 +0000268 if (!rdb)
wdenkc7de8292002-11-19 11:04:11 +0000269 {
270 PRINTF("find_partition: no rdb found\n");
271 return NULL;
272 }
wdenk8bde7f72003-06-27 21:31:46 +0000273
wdenkc7de8292002-11-19 11:04:11 +0000274 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;
wdenk8bde7f72003-06-27 21:31:46 +0000292 else
wdenkc7de8292002-11-19 11:04:11 +0000293 {
294 partnum--;
295 block = p->next;
296 }
297 }
298 } else block = 0xFFFFFFFF;
299 } else block = 0xFFFFFFFF;
300 }
301
wdenk8bde7f72003-06-27 21:31:46 +0000302 if (block == 0xFFFFFFFF)
wdenkc7de8292002-11-19 11:04:11 +0000303 {
304 PRINTF("PART block not found\n");
305 return NULL;
306 }
307
308 return (struct partition_block *)block_buffer;
309}
310
wdenk8bde7f72003-06-27 21:31:46 +0000311/*
wdenkc7de8292002-11-19 11:04:11 +0000312 * Get info about a partition
313 */
314int 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);
wdenk8bde7f72003-06-27 21:31:46 +0000327
wdenkc7de8292002-11-19 11:04:11 +0000328
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;
wdenk8bde7f72003-06-27 21:31:46 +0000337
wdenkc7de8292002-11-19 11:04:11 +0000338 return 0;
339}
340
341void print_part_amiga (block_dev_desc_t *dev_desc)
wdenk8bde7f72003-06-27 21:31:46 +0000342{
wdenkc7de8292002-11-19 11:04:11 +0000343 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);
wdenk8bde7f72003-06-27 21:31:46 +0000350 if (!rdb)
wdenkc7de8292002-11-19 11:04:11 +0000351 {
352 PRINTF("print_part_amiga: no rdb found\n");
353 return;
354 }
wdenk8bde7f72003-06-27 21:31:46 +0000355
wdenkc7de8292002-11-19 11:04:11 +0000356 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);
wdenk8bde7f72003-06-27 21:31:46 +0000376
wdenkc7de8292002-11-19 11:04:11 +0000377 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