2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
6 * Andreas Heppel <aheppel@sysgo.de>
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #if defined(CFG_ENV_IS_IN_FLASH) /* Environment is in Flash */
34 #include <environment.h>
35 #include <cmd_nvedit.h>
36 #include <linux/stddef.h>
39 #if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_FLASH)) == (CFG_CMD_ENV|CFG_CMD_FLASH))
41 #elif defined(CFG_ENV_ADDR_REDUND)
42 #error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH
45 #if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
46 #error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
50 # ifdef CFG_ENV_ADDR_REDUND
51 #error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
55 char * env_name_spec = "Flash";
57 #ifdef ENV_IS_EMBEDDED
59 extern uchar environment[];
60 env_t *env_ptr = (env_t *)(&environment[0]);
63 /* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
64 static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
67 #else /* ! ENV_IS_EMBEDDED */
69 env_t *env_ptr = (env_t *)CFG_ENV_ADDR;
71 static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
74 #endif /* ENV_IS_EMBEDDED */
76 #ifdef CFG_ENV_ADDR_REDUND
77 static env_t *flash_addr_new = (env_t *)CFG_ENV_ADDR_REDUND;
79 /* CFG_ENV_ADDR is supposed to be on sector boundary */
80 static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1;
81 static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1;
83 static uchar active_flag = 1;
84 static uchar obsolete_flag = 0;
87 extern uchar default_environment[];
88 extern int default_environment_size;
91 uchar env_get_char_spec (int index)
93 DECLARE_GLOBAL_DATA_PTR;
95 return ( *((uchar *)(gd->env_addr + index)) );
98 #ifdef CFG_ENV_ADDR_REDUND
102 DECLARE_GLOBAL_DATA_PTR;
105 (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
107 (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
109 uchar flag1 = flash_addr->flags;
110 uchar flag2 = flash_addr_new->flags;
112 ulong addr_default = (ulong)&default_environment[0];
113 ulong addr1 = (ulong)&(flash_addr->data);
114 ulong addr2 = (ulong)&(flash_addr_new->data);
116 if (crc1_ok && ! crc2_ok)
118 gd->env_addr = addr1;
121 else if (! crc1_ok && crc2_ok)
123 gd->env_addr = addr2;
126 else if (! crc1_ok && ! crc2_ok)
128 gd->env_addr = addr_default;
131 else if (flag1 == active_flag && flag2 == obsolete_flag)
133 gd->env_addr = addr1;
136 else if (flag1 == obsolete_flag && flag2 == active_flag)
138 gd->env_addr = addr2;
141 else if (flag1 == flag2)
143 gd->env_addr = addr1;
146 else if (flag1 == 0xFF)
148 gd->env_addr = addr1;
151 else if (flag2 == 0xFF)
153 gd->env_addr = addr2;
163 char *saved_data = NULL;
165 #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
169 debug ("Protect off %08lX ... %08lX\n",
170 (ulong)flash_addr, end_addr);
172 if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
176 debug ("Protect off %08lX ... %08lX\n",
177 (ulong)flash_addr_new, end_addr_new);
179 if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
183 #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
184 up_data = (end_addr_new + 1 - ((long)flash_addr_new + CFG_ENV_SIZE));
185 debug ("Data to save 0x%x\n", up_data);
187 if ((saved_data = malloc(up_data)) == NULL) {
188 printf("Unable to save the rest of sector (%ld)\n",
193 (void *)((long)flash_addr_new + CFG_ENV_SIZE), up_data);
194 debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n",
195 (long)flash_addr_new + CFG_ENV_SIZE,
196 up_data, saved_data);
199 puts ("Erasing Flash...");
200 debug (" %08lX ... %08lX ...",
201 (ulong)flash_addr_new, end_addr_new);
203 if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
207 puts ("Writing to Flash... ");
208 debug (" %08lX ... %08lX ...",
209 (ulong)&(flash_addr_new->data),
210 sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
211 if (flash_write(env_ptr->data,
212 (ulong)&(flash_addr_new->data),
213 sizeof(env_ptr->data)) ||
215 flash_write((char *)&(env_ptr->crc),
216 (ulong)&(flash_addr_new->crc),
217 sizeof(env_ptr->crc)) ||
219 flash_write((char *)&obsolete_flag,
220 (ulong)&(flash_addr->flags),
221 sizeof(flash_addr->flags)) ||
223 flash_write((char *)&active_flag,
224 (ulong)&(flash_addr_new->flags),
225 sizeof(flash_addr_new->flags)))
232 #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
233 if (up_data) { /* restore the rest of sector */
234 debug ("Restoring the rest of data to 0x%x len 0x%x\n",
235 (long)flash_addr_new + CFG_ENV_SIZE, up_data);
236 if (flash_write(saved_data,
237 (long)flash_addr_new + CFG_ENV_SIZE,
245 env_t * etmp = flash_addr;
246 ulong ltmp = end_addr;
248 flash_addr = flash_addr_new;
249 flash_addr_new = etmp;
251 end_addr = end_addr_new;
260 /* try to re-protect */
261 (void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
262 (void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
266 #endif /* CMD_SAVEENV */
268 #else /* ! CFG_ENV_ADDR_REDUND */
272 DECLARE_GLOBAL_DATA_PTR;
274 if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
275 gd->env_addr = (ulong)&(env_ptr->data);
278 gd->env_addr = (ulong)&default_environment[0];
291 ulong flash_sect_addr;
292 #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
294 uchar env_buffer[CFG_ENV_SECT_SIZE];
296 uchar *env_buffer = (char *)env_ptr;
297 #endif /* CFG_ENV_SECT_SIZE */
300 #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
302 flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
303 flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);
305 debug ( "copy old content: "
306 "sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
307 flash_sect_addr, (ulong)flash_addr, flash_offset);
309 /* copy old contents to temporary buffer */
310 memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);
312 /* copy current environment to temporary buffer */
313 memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
317 len = CFG_ENV_SECT_SIZE;
319 flash_sect_addr = (ulong)flash_addr;
321 #endif /* CFG_ENV_SECT_SIZE */
323 #ifndef CONFIG_INFERNO
324 end_addr = flash_sect_addr + len - 1;
326 /* this is the last sector, and the size is hardcoded here */
327 /* otherwise we will get stack problems on loading 128 KB environment */
328 end_addr = flash_sect_addr + 0x20000 - 1;
331 debug ("Protect off %08lX ... %08lX\n",
332 (ulong)flash_sect_addr, end_addr);
334 if (flash_sect_protect (0, flash_sect_addr, end_addr))
337 puts ("Erasing Flash...");
338 if (flash_sect_erase (flash_sect_addr, end_addr))
341 puts ("Writing to Flash... ");
342 rc = flash_write(env_buffer, flash_sect_addr, len);
350 /* try to re-protect */
351 (void) flash_sect_protect (1, flash_sect_addr, end_addr);
355 #endif /* CMD_SAVEENV */
357 #endif /* CFG_ENV_ADDR_REDUND */
359 void env_relocate_spec (void)
361 #if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND)
362 #ifdef CFG_ENV_ADDR_REDUND
363 DECLARE_GLOBAL_DATA_PTR;
365 if (gd->env_addr != (ulong)&(flash_addr->data))
367 env_t * etmp = flash_addr;
368 ulong ltmp = end_addr;
370 flash_addr = flash_addr_new;
371 flash_addr_new = etmp;
373 end_addr = end_addr_new;
377 if (flash_addr_new->flags != obsolete_flag &&
378 crc32(0, flash_addr_new->data, ENV_SIZE) ==
382 flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
383 flash_write((char *)&obsolete_flag,
384 (ulong)&(flash_addr_new->flags),
385 sizeof(flash_addr_new->flags));
386 flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
389 if (flash_addr->flags != active_flag &&
390 (flash_addr->flags & active_flag) == active_flag)
393 flash_sect_protect (0, (ulong)flash_addr, end_addr);
394 flash_write((char *)&active_flag,
395 (ulong)&(flash_addr->flags),
396 sizeof(flash_addr->flags));
397 flash_sect_protect (1, (ulong)flash_addr, end_addr);
400 if (gd->env_valid == 2)
401 puts ("*** Warning - some problems detected "
402 "reading environment; recovered successfully\n\n");
403 #endif /* CFG_ENV_ADDR_REDUND */
404 memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
405 #endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */
408 #endif /* CFG_ENV_IS_IN_FLASH */