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 #include <environment.h>
32 #include <linux/stddef.h>
35 DECLARE_GLOBAL_DATA_PTR;
37 #if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
39 #elif defined(CONFIG_ENV_ADDR_REDUND)
40 #error Cannot use CONFIG_ENV_ADDR_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
43 #if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
44 #error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
47 char * env_name_spec = "Flash";
49 #ifdef ENV_IS_EMBEDDED
51 extern uchar environment[];
52 env_t *env_ptr = (env_t *)(&environment[0]);
55 /* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
56 static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
59 #else /* ! ENV_IS_EMBEDDED */
61 env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
63 static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
66 #endif /* ENV_IS_EMBEDDED */
68 #ifdef CONFIG_ENV_ADDR_REDUND
69 static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
71 /* CONFIG_ENV_ADDR is supposed to be on sector boundary */
72 static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
73 static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
76 #define OBSOLETE_FLAG 0
77 #endif /* CONFIG_ENV_ADDR_REDUND */
79 extern uchar default_environment[];
82 uchar env_get_char_spec (int index)
84 return ( *((uchar *)(gd->env_addr + index)) );
87 #ifdef CONFIG_ENV_ADDR_REDUND
91 int crc1_ok = 0, crc2_ok = 0;
93 uchar flag1 = flash_addr->flags;
94 uchar flag2 = flash_addr_new->flags;
96 ulong addr_default = (ulong)&default_environment[0];
97 ulong addr1 = (ulong)&(flash_addr->data);
98 ulong addr2 = (ulong)&(flash_addr_new->data);
100 crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
101 crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
103 if (crc1_ok && ! crc2_ok) {
104 gd->env_addr = addr1;
106 } else if (! crc1_ok && crc2_ok) {
107 gd->env_addr = addr2;
109 } else if (! crc1_ok && ! crc2_ok) {
110 gd->env_addr = addr_default;
112 } else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
113 gd->env_addr = addr1;
115 } else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
116 gd->env_addr = addr2;
118 } else if (flag1 == flag2) {
119 gd->env_addr = addr1;
121 } else if (flag1 == 0xFF) {
122 gd->env_addr = addr1;
124 } else if (flag2 == 0xFF) {
125 gd->env_addr = addr2;
135 char *saved_data = NULL;
137 char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
138 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
142 debug ("Protect off %08lX ... %08lX\n",
143 (ulong)flash_addr, end_addr);
145 if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
149 debug ("Protect off %08lX ... %08lX\n",
150 (ulong)flash_addr_new, end_addr_new);
152 if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
156 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
157 up_data = (end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE));
158 debug ("Data to save 0x%x\n", up_data);
160 if ((saved_data = malloc(up_data)) == NULL) {
161 printf("Unable to save the rest of sector (%ld)\n",
166 (void *)((long)flash_addr_new + CONFIG_ENV_SIZE), up_data);
167 debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n",
168 (long)flash_addr_new + CONFIG_ENV_SIZE,
169 up_data, saved_data);
172 puts ("Erasing Flash...");
173 debug (" %08lX ... %08lX ...",
174 (ulong)flash_addr_new, end_addr_new);
176 if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
180 puts ("Writing to Flash... ");
181 debug (" %08lX ... %08lX ...",
182 (ulong)&(flash_addr_new->data),
183 sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
184 if ((rc = flash_write((char *)env_ptr->data,
185 (ulong)&(flash_addr_new->data),
186 sizeof(env_ptr->data))) ||
187 (rc = flash_write((char *)&(env_ptr->crc),
188 (ulong)&(flash_addr_new->crc),
189 sizeof(env_ptr->crc))) ||
190 (rc = flash_write(&flag,
191 (ulong)&(flash_addr->flags),
192 sizeof(flash_addr->flags))) ||
193 (rc = flash_write(&new_flag,
194 (ulong)&(flash_addr_new->flags),
195 sizeof(flash_addr_new->flags))))
202 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
203 if (up_data) { /* restore the rest of sector */
204 debug ("Restoring the rest of data to 0x%x len 0x%x\n",
205 (long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
206 if (flash_write(saved_data,
207 (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;
230 /* try to re-protect */
231 (void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
232 (void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
236 #endif /* CMD_SAVEENV */
238 #else /* ! CONFIG_ENV_ADDR_REDUND */
242 if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
243 gd->env_addr = (ulong)&(env_ptr->data);
248 gd->env_addr = (ulong)&default_environment[0];
259 ulong flash_sect_addr;
260 #if defined(CONFIG_ENV_SECT_SIZE) && (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE)
262 uchar env_buffer[CONFIG_ENV_SECT_SIZE];
264 uchar *env_buffer = (uchar *)env_ptr;
265 #endif /* CONFIG_ENV_SECT_SIZE */
268 #if defined(CONFIG_ENV_SECT_SIZE) && (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE)
270 flash_offset = ((ulong)flash_addr) & (CONFIG_ENV_SECT_SIZE-1);
271 flash_sect_addr = ((ulong)flash_addr) & ~(CONFIG_ENV_SECT_SIZE-1);
273 debug ( "copy old content: "
274 "sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
275 flash_sect_addr, (ulong)flash_addr, flash_offset);
277 /* copy old contents to temporary buffer */
278 memcpy (env_buffer, (void *)flash_sect_addr, CONFIG_ENV_SECT_SIZE);
280 /* copy current environment to temporary buffer */
281 memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
285 len = CONFIG_ENV_SECT_SIZE;
287 flash_sect_addr = (ulong)flash_addr;
288 len = CONFIG_ENV_SIZE;
289 #endif /* CONFIG_ENV_SECT_SIZE */
291 end_addr = flash_sect_addr + len - 1;
293 debug ("Protect off %08lX ... %08lX\n",
294 (ulong)flash_sect_addr, end_addr);
296 if (flash_sect_protect (0, flash_sect_addr, end_addr))
299 puts ("Erasing Flash...");
300 if (flash_sect_erase (flash_sect_addr, end_addr))
303 puts ("Writing to Flash... ");
304 rc = flash_write((char *)env_buffer, flash_sect_addr, len);
312 /* try to re-protect */
313 (void) flash_sect_protect (1, flash_sect_addr, end_addr);
317 #endif /* CMD_SAVEENV */
319 #endif /* CONFIG_ENV_ADDR_REDUND */
321 void env_relocate_spec (void)
323 #if !defined(ENV_IS_EMBEDDED) || defined(CONFIG_ENV_ADDR_REDUND)
324 #ifdef CONFIG_ENV_ADDR_REDUND
325 if (gd->env_addr != (ulong)&(flash_addr->data)) {
326 env_t * etmp = flash_addr;
327 ulong ltmp = end_addr;
329 flash_addr = flash_addr_new;
330 flash_addr_new = etmp;
332 end_addr = end_addr_new;
336 if (flash_addr_new->flags != OBSOLETE_FLAG &&
337 crc32(0, flash_addr_new->data, ENV_SIZE) ==
338 flash_addr_new->crc) {
339 char flag = OBSOLETE_FLAG;
342 flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
344 (ulong)&(flash_addr_new->flags),
345 sizeof(flash_addr_new->flags));
346 flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
349 if (flash_addr->flags != ACTIVE_FLAG &&
350 (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
351 char flag = ACTIVE_FLAG;
354 flash_sect_protect (0, (ulong)flash_addr, end_addr);
356 (ulong)&(flash_addr->flags),
357 sizeof(flash_addr->flags));
358 flash_sect_protect (1, (ulong)flash_addr, end_addr);
361 if (gd->env_valid == 2)
362 puts ("*** Warning - some problems detected "
363 "reading environment; recovered successfully\n\n");
364 #endif /* CONFIG_ENV_ADDR_REDUND */
366 memcpy (env_ptr, (void*)flash_addr, CONFIG_ENV_SIZE);
368 #endif /* ! ENV_IS_EMBEDDED || CONFIG_ENV_ADDR_REDUND */