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 <linux/stddef.h>
38 DECLARE_GLOBAL_DATA_PTR;
40 #if ((CONFIG_COMMANDS & (CFG_CMD_ENV | CFG_CMD_FLASH)) == (CFG_CMD_ENV | CFG_CMD_FLASH))
42 #elif defined(CFG_ENV_ADDR_REDUND)
43 #error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH
46 #if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
47 #error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
51 #ifdef CFG_ENV_ADDR_REDUND
52 #error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
56 char *env_name_spec = "flash";
58 #ifdef ENV_IS_EMBEDDED
60 extern uchar environment[];
61 env_t *env_ptr = (env_t *)(&environment[0]);
64 /* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
65 static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
68 #else /* ! ENV_IS_EMBEDDED */
70 env_t *env_ptr = (env_t *)CFG_ENV_ADDR;
73 static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
76 #endif /* ENV_IS_EMBEDDED */
78 #ifdef CFG_ENV_ADDR_REDUND
79 static env_t *flash_addr_new = (env_t *)CFG_ENV_ADDR_REDUND;
81 /* CFG_ENV_ADDR is supposed to be on sector boundary */
82 static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1;
83 static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1;
86 #define OBSOLETE_FLAG 0
87 #endif /* CFG_ENV_ADDR_REDUND */
89 extern uchar default_environment[];
90 extern int default_environment_size;
92 uchar env_get_char_spec(int index){
93 return(*((uchar *)(gd->env_addr + index)));
96 #ifdef CFG_ENV_ADDR_REDUND
99 int crc1_ok = 0, crc2_ok = 0;
101 uchar flag1 = flash_addr->flags;
102 uchar flag2 = flash_addr_new->flags;
104 ulong addr_default = (ulong)&default_environment[0];
105 ulong addr1 = (ulong)&(flash_addr->data);
106 ulong addr2 = (ulong)&(flash_addr_new->data);
108 crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
109 crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
111 if(crc1_ok && !crc2_ok){
112 gd->env_addr = addr1;
114 } else if(!crc1_ok && crc2_ok){
115 gd->env_addr = addr2;
117 } else if(!crc1_ok && !crc2_ok){
118 gd->env_addr = addr_default;
120 } else if(flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG){
121 gd->env_addr = addr1;
123 } else if(flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG){
124 gd->env_addr = addr2;
126 } else if(flag1 == flag2){
127 gd->env_addr = addr1;
129 } else if(flag1 == 0xFF){
130 gd->env_addr = addr1;
132 } else if(flag2 == 0xFF){
133 gd->env_addr = addr2;
142 char *saved_data = NULL;
144 char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
145 #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
149 //debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
151 if(flash_sect_protect(0, (ulong)flash_addr, end_addr)){
155 //debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr_new, end_addr_new);
157 if(flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new)){
161 #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
162 up_data = (end_addr_new + 1 - ((long)flash_addr_new + CFG_ENV_SIZE));
163 //debug ("Data to save 0x%x\n", up_data);
166 if((saved_data = malloc(up_data)) == NULL){
167 printf("## Error: unable to save the rest of sector (%ld)\n", up_data);
171 memcpy(saved_data, (void *)((long)flash_addr_new + CFG_ENV_SIZE), up_data);
172 //debug("Data (start 0x%x, len 0x%x) saved at 0x%x\n", (long)flash_addr_new + CFG_ENV_SIZE, up_data, saved_data);
175 //debug("Erasing Flash...");
176 //debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
178 if(flash_sect_erase((ulong)flash_addr_new, end_addr_new)){
182 //debug("Writing to Flash... ");
183 //debug(" %08lX ... %08lX ...", (ulong)&(flash_addr_new->data), sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
185 if((rc = flash_write((char *)env_ptr->data, (ulong)&(flash_addr_new->data), sizeof(env_ptr->data))) ||
186 (rc = flash_write((char *)&(env_ptr->crc), (ulong)&(flash_addr_new->crc), sizeof(env_ptr->crc))) ||
187 (rc = flash_write(&flag, (ulong)&(flash_addr->flags), sizeof(flash_addr->flags))) ||
188 (rc = flash_write(&new_flag, (ulong)&(flash_addr_new->flags), sizeof(flash_addr_new->flags)))){
195 #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
196 if(up_data){ /* restore the rest of sector */
197 //debug("Restoring the rest of data to 0x%x len 0x%x\n", (long)flash_addr_new + CFG_ENV_SIZE, up_data);
198 if(flash_write(saved_data, (long)flash_addr_new + CFG_ENV_SIZE, up_data)){
204 env_t * etmp = flash_addr;
205 ulong ltmp = end_addr;
207 flash_addr = flash_addr_new;
208 flash_addr_new = etmp;
210 end_addr = end_addr_new;
221 /* try to re-protect */
222 (void)flash_sect_protect(1, (ulong)flash_addr, end_addr);
223 (void)flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
227 #endif /* CMD_SAVEENV */
229 #else /* ! CFG_ENV_ADDR_REDUND */
231 if(crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc){
232 gd->env_addr = (ulong)&(env_ptr->data);
238 gd->env_addr = (ulong)&default_environment[0];
247 ulong end_addr, flash_sect_addr;
248 #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
250 uchar env_buffer[CFG_ENV_SECT_SIZE];
252 uchar *env_buffer = (uchar *)env_ptr;
253 #endif /* CFG_ENV_SECT_SIZE */
256 #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
258 flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
259 flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);
261 //debug("copy old content: sect_addr: %08lX env_addr: %08lX offset: %08lX\n", flash_sect_addr, (ulong)flash_addr, flash_offset);
263 /* copy old contents to temporary buffer */
264 memcpy(env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);
266 /* copy current environment to temporary buffer */
267 memcpy((uchar *)((unsigned long)env_buffer + flash_offset), env_ptr, CFG_ENV_SIZE);
269 len = CFG_ENV_SECT_SIZE;
271 flash_sect_addr = (ulong)flash_addr;
273 #endif /* CFG_ENV_SECT_SIZE */
275 #ifndef CONFIG_INFERNO
276 end_addr = flash_sect_addr + len - 1;
278 /* this is the last sector, and the size is hardcoded here */
279 /* otherwise we will get stack problems on loading 128 KB environment */
280 end_addr = flash_sect_addr + 0x20000 - 1;
283 //debug("Protect off %08lX ... %08lX\n", (ulong)flash_sect_addr, end_addr);
285 if(flash_sect_protect(0, flash_sect_addr, end_addr)){
289 //debug("Erasing Flash...");
291 if(flash_sect_erase(flash_sect_addr, end_addr)){
295 //debug("Writing to Flash... ");
297 rc = flash_write((char *)env_buffer, flash_sect_addr, len);
306 /* try to re-protect */
307 (void)flash_sect_protect(1, flash_sect_addr, end_addr);
312 #endif /* CMD_SAVEENV */
314 #endif /* CFG_ENV_ADDR_REDUND */
316 void env_relocate_spec(void){
317 #if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND)
318 #ifdef CFG_ENV_ADDR_REDUND
319 if(gd->env_addr != (ulong)&(flash_addr->data)){
320 env_t * etmp = flash_addr;
321 ulong ltmp = end_addr;
323 flash_addr = flash_addr_new;
324 flash_addr_new = etmp;
326 end_addr = end_addr_new;
330 if(flash_addr_new->flags != OBSOLETE_FLAG && crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc){
331 char flag = OBSOLETE_FLAG;
335 flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
336 flash_write(&flag, (ulong)&(flash_addr_new->flags), sizeof(flash_addr_new->flags));
337 flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
340 if(flash_addr->flags != ACTIVE_FLAG && (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG){
341 char flag = ACTIVE_FLAG;
345 flash_sect_protect(0, (ulong)flash_addr, end_addr);
346 flash_write(&flag, (ulong)&(flash_addr->flags), sizeof(flash_addr->flags));
347 flash_sect_protect(1, (ulong)flash_addr, end_addr);
350 if(gd->env_valid == 2){
351 puts("** Warning: some problems detected reading environment, recovered successfully\n");
353 #endif /* CFG_ENV_ADDR_REDUND */
355 memcpy(env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
357 #endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */
360 #endif /* CFG_ENV_IS_IN_FLASH */