2 * (C) Copyright 2000-2010
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 #include <environment.h>
32 #include <linux/stddef.h>
37 DECLARE_GLOBAL_DATA_PTR;
39 #if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
41 #elif defined(CONFIG_ENV_ADDR_REDUND)
42 #error Cannot use CONFIG_ENV_ADDR_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
45 #if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
46 #error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
49 char * env_name_spec = "Flash";
51 #ifdef ENV_IS_EMBEDDED
52 env_t *env_ptr = &environment;
54 static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
56 #else /* ! ENV_IS_EMBEDDED */
58 env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
59 static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
61 #endif /* ENV_IS_EMBEDDED */
63 #if defined(CMD_SAVEENV) || defined(CONFIG_ENV_ADDR_REDUND)
64 /* CONFIG_ENV_ADDR is supposed to be on sector boundary */
65 static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
68 #ifdef CONFIG_ENV_ADDR_REDUND
69 static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
71 /* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
72 static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
73 #endif /* CONFIG_ENV_ADDR_REDUND */
76 uchar env_get_char_spec(int index)
78 return (*((uchar *)(gd->env_addr + index)));
81 #ifdef CONFIG_ENV_ADDR_REDUND
85 int crc1_ok = 0, crc2_ok = 0;
87 uchar flag1 = flash_addr->flags;
88 uchar flag2 = flash_addr_new->flags;
90 ulong addr_default = (ulong)&default_environment[0];
91 ulong addr1 = (ulong)&(flash_addr->data);
92 ulong addr2 = (ulong)&(flash_addr_new->data);
94 crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
95 crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
97 if (crc1_ok && ! crc2_ok) {
100 } else if (! crc1_ok && crc2_ok) {
101 gd->env_addr = addr2;
103 } else if (! crc1_ok && ! crc2_ok) {
104 gd->env_addr = addr_default;
106 } else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
107 gd->env_addr = addr1;
109 } else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
110 gd->env_addr = addr2;
112 } else if (flag1 == flag2) {
113 gd->env_addr = addr1;
115 } else if (flag1 == 0xFF) {
116 gd->env_addr = addr1;
118 } else if (flag2 == 0xFF) {
119 gd->env_addr = addr2;
131 char *saved_data = NULL;
134 char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
135 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
139 debug("Protect off %08lX ... %08lX\n",
140 (ulong)flash_addr, end_addr);
142 if (flash_sect_protect(0, (ulong)flash_addr, end_addr)) {
146 debug("Protect off %08lX ... %08lX\n",
147 (ulong)flash_addr_new, end_addr_new);
149 if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new)) {
153 res = (char *)&env_new.data;
154 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
156 error("Cannot export environment: errno = %d\n", errno);
159 env_new.crc = crc32(0, env_new.data, ENV_SIZE);
160 env_new.flags = new_flag;
162 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
163 up_data = (end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE));
164 debug("Data to save 0x%lX\n", up_data);
166 if ((saved_data = malloc(up_data)) == NULL) {
167 printf("Unable to save the rest of sector (%ld)\n",
172 (void *)((long)flash_addr_new + CONFIG_ENV_SIZE), up_data);
173 debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
174 (long)flash_addr_new + CONFIG_ENV_SIZE,
175 up_data, saved_data);
178 puts("Erasing Flash...");
179 debug(" %08lX ... %08lX ...",
180 (ulong)flash_addr_new, end_addr_new);
182 if (flash_sect_erase((ulong)flash_addr_new, end_addr_new)) {
186 puts("Writing to Flash... ");
187 debug(" %08lX ... %08lX ...",
188 (ulong)&(flash_addr_new->data),
189 sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
190 if ((rc = flash_write((char *)&env_new,
191 (ulong)flash_addr_new,
193 (rc = flash_write(&flag,
194 (ulong)&(flash_addr->flags),
195 sizeof(flash_addr->flags))) ) {
200 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
201 if (up_data) { /* restore the rest of sector */
202 debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
203 (long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
204 if (flash_write(saved_data,
205 (long)flash_addr_new + CONFIG_ENV_SIZE,
215 env_t * etmp = flash_addr;
216 ulong ltmp = end_addr;
218 flash_addr = flash_addr_new;
219 flash_addr_new = etmp;
221 end_addr = end_addr_new;
229 /* try to re-protect */
230 (void) flash_sect_protect(1, (ulong)flash_addr, end_addr);
231 (void) flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
235 #endif /* CMD_SAVEENV */
237 #else /* ! CONFIG_ENV_ADDR_REDUND */
241 if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
242 gd->env_addr = (ulong)&(env_ptr->data);
247 gd->env_addr = (ulong)&default_environment[0];
260 char *saved_data = NULL;
261 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
264 up_data = (end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE));
265 debug("Data to save 0x%lx\n", up_data);
267 if ((saved_data = malloc(up_data)) == NULL) {
268 printf("Unable to save the rest of sector (%ld)\n",
273 (void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
274 debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
275 (ulong)flash_addr + CONFIG_ENV_SIZE,
279 #endif /* CONFIG_ENV_SECT_SIZE */
281 debug("Protect off %08lX ... %08lX\n",
282 (ulong)flash_addr, end_addr);
284 if (flash_sect_protect(0, (long)flash_addr, end_addr))
287 res = (char *)&env_new.data;
288 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
290 error("Cannot export environment: errno = %d\n", errno);
293 env_new.crc = crc32(0, env_new.data, ENV_SIZE);
295 puts("Erasing Flash...");
296 if (flash_sect_erase((long)flash_addr, end_addr))
299 puts("Writing to Flash... ");
300 rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
305 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
306 if (up_data) { /* restore the rest of sector */
307 debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
308 (ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
309 if (flash_write(saved_data,
310 (long)flash_addr + CONFIG_ENV_SIZE,
322 /* try to re-protect */
323 (void) flash_sect_protect(1, (long)flash_addr, end_addr);
327 #endif /* CMD_SAVEENV */
329 #endif /* CONFIG_ENV_ADDR_REDUND */
331 void env_relocate_spec(void)
333 #ifdef CONFIG_ENV_ADDR_REDUND
334 if (gd->env_addr != (ulong)&(flash_addr->data)) {
335 env_t *etmp = flash_addr;
336 ulong ltmp = end_addr;
338 flash_addr = flash_addr_new;
339 flash_addr_new = etmp;
341 end_addr = end_addr_new;
345 if (flash_addr_new->flags != OBSOLETE_FLAG &&
346 crc32(0, flash_addr_new->data, ENV_SIZE) ==
347 flash_addr_new->crc) {
348 char flag = OBSOLETE_FLAG;
351 flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
353 (ulong)&(flash_addr_new->flags),
354 sizeof(flash_addr_new->flags));
355 flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
358 if (flash_addr->flags != ACTIVE_FLAG &&
359 (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
360 char flag = ACTIVE_FLAG;
363 flash_sect_protect(0, (ulong)flash_addr, end_addr);
365 (ulong)&(flash_addr->flags),
366 sizeof(flash_addr->flags));
367 flash_sect_protect(1, (ulong)flash_addr, end_addr);
370 if (gd->env_valid == 2)
371 puts ("*** Warning - some problems detected "
372 "reading environment; recovered successfully\n\n");
373 #endif /* CONFIG_ENV_ADDR_REDUND */
375 env_import((char *)flash_addr, 1);