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>
38 #if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_FLASH)) == (CFG_CMD_ENV|CFG_CMD_FLASH))
40 #elif defined(CFG_ENV_ADDR_REDUND)
41 #error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH
44 #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) && \
45 defined(CFG_ENV_ADDR_REDUND)
46 #error CFG_ENV_ADDR_REDUND should not be used when CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
49 #if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
50 #error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
54 # ifdef CFG_ENV_ADDR_REDUND
55 #error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
59 char * env_name_spec
= "Flash";
61 #ifdef ENV_IS_EMBEDDED
63 extern uchar environment
[];
64 env_t
*env_ptr
= (env_t
*)(&environment
[0]);
67 /* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
68 static env_t
*flash_addr
= (env_t
*)CFG_ENV_ADDR
;
71 #else /* ! ENV_IS_EMBEDDED */
73 env_t
*env_ptr
= (env_t
*)CFG_ENV_ADDR
;
75 static env_t
*flash_addr
= (env_t
*)CFG_ENV_ADDR
;
78 #endif /* ENV_IS_EMBEDDED */
80 #ifdef CFG_ENV_ADDR_REDUND
81 static env_t
*flash_addr_new
= (env_t
*)CFG_ENV_ADDR_REDUND
;
83 static ulong end_addr
= CFG_ENV_ADDR
+ CFG_ENV_SIZE
- 1;
84 static ulong end_addr_new
= CFG_ENV_ADDR_REDUND
+ CFG_ENV_SIZE_REDUND
- 1;
86 static uchar active_flag
= 1;
87 static uchar obsolete_flag
= 0;
90 extern uchar default_environment
[];
91 extern int default_environment_size
;
94 uchar
env_get_char_spec (int index
)
96 DECLARE_GLOBAL_DATA_PTR
;
98 return ( *((uchar
*)(gd
->env_addr
+ index
)) );
101 #ifdef CFG_ENV_ADDR_REDUND
105 DECLARE_GLOBAL_DATA_PTR
;
108 (crc32(0, flash_addr
->data
, ENV_SIZE
) == flash_addr
->crc
);
110 (crc32(0, flash_addr_new
->data
, ENV_SIZE
) == flash_addr_new
->crc
);
112 uchar flag1
= flash_addr
->flags
;
113 uchar flag2
= flash_addr_new
->flags
;
115 ulong addr_default
= (ulong
)&default_environment
[0];
116 ulong addr1
= (ulong
)&(flash_addr
->data
);
117 ulong addr2
= (ulong
)&(flash_addr_new
->data
);
119 if (crc1_ok
&& ! crc2_ok
)
121 gd
->env_addr
= addr1
;
124 else if (! crc1_ok
&& crc2_ok
)
126 gd
->env_addr
= addr2
;
129 else if (! crc1_ok
&& ! crc2_ok
)
131 gd
->env_addr
= addr_default
;
134 else if (flag1
== active_flag
&& flag2
== obsolete_flag
)
136 gd
->env_addr
= addr1
;
139 else if (flag1
== obsolete_flag
&& flag2
== active_flag
)
141 gd
->env_addr
= addr2
;
144 else if (flag1
== flag2
)
146 gd
->env_addr
= addr1
;
149 else if (flag1
== 0xFF)
151 gd
->env_addr
= addr1
;
154 else if (flag2
== 0xFF)
156 gd
->env_addr
= addr2
;
168 debug ("Protect off %08lX ... %08lX\n",
169 (ulong
)flash_addr
, end_addr
);
171 if (flash_sect_protect (0, (ulong
)flash_addr
, end_addr
)) {
175 debug ("Protect off %08lX ... %08lX\n",
176 (ulong
)flash_addr_new
, end_addr_new
);
178 if (flash_sect_protect (0, (ulong
)flash_addr_new
, end_addr_new
)) {
182 puts ("Erasing Flash...");
183 debug (" %08lX ... %08lX ...",
184 (ulong
)flash_addr_new
, end_addr_new
);
186 if (flash_sect_erase ((ulong
)flash_addr_new
, end_addr_new
)) {
190 puts ("Writing to Flash... ");
191 debug (" %08lX ... %08lX ...",
192 (ulong
)&(flash_addr_new
->data
),
193 sizeof(env_ptr
->data
)+(ulong
)&(flash_addr_new
->data
));
194 if (flash_write(env_ptr
->data
,
195 (ulong
)&(flash_addr_new
->data
),
196 sizeof(env_ptr
->data
)) ||
198 flash_write((char *)&(env_ptr
->crc
),
199 (ulong
)&(flash_addr_new
->crc
),
200 sizeof(env_ptr
->crc
)) ||
202 flash_write((char *)&obsolete_flag
,
203 (ulong
)&(flash_addr
->flags
),
204 sizeof(flash_addr
->flags
)) ||
206 flash_write((char *)&active_flag
,
207 (ulong
)&(flash_addr_new
->flags
),
208 sizeof(flash_addr_new
->flags
)))
216 env_t
* etmp
= flash_addr
;
217 ulong ltmp
= end_addr
;
219 flash_addr
= flash_addr_new
;
220 flash_addr_new
= etmp
;
222 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 /* ! CFG_ENV_ADDR_REDUND */
241 DECLARE_GLOBAL_DATA_PTR
;
243 if (crc32(0, env_ptr
->data
, ENV_SIZE
) == env_ptr
->crc
) {
244 gd
->env_addr
= (ulong
)&(env_ptr
->data
);
247 gd
->env_addr
= (ulong
)&default_environment
[0];
260 ulong flash_sect_addr
;
261 #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
263 uchar env_buffer
[CFG_ENV_SECT_SIZE
];
265 uchar
*env_buffer
= (char *)env_ptr
;
266 #endif /* CFG_ENV_SECT_SIZE */
269 #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
271 flash_offset
= ((ulong
)flash_addr
) & (CFG_ENV_SECT_SIZE
-1);
272 flash_sect_addr
= ((ulong
)flash_addr
) & ~(CFG_ENV_SECT_SIZE
-1);
274 debug ( "copy old content: "
275 "sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
276 flash_sect_addr
, (ulong
)flash_addr
, flash_offset
);
278 /* copy old contents to temporary buffer */
279 memcpy (env_buffer
, (void *)flash_sect_addr
, CFG_ENV_SECT_SIZE
);
281 /* copy current environment to temporary buffer */
282 memcpy ((uchar
*)((unsigned long)env_buffer
+ flash_offset
),
286 len
= CFG_ENV_SECT_SIZE
;
288 flash_sect_addr
= (ulong
)flash_addr
;
290 #endif /* CFG_ENV_SECT_SIZE */
292 #ifndef CONFIG_INFERNO
293 end_addr
= flash_sect_addr
+ len
- 1;
295 /* this is the last sector, and the size is hardcoded here */
296 /* otherwise we will get stack problems on loading 128 KB environment */
297 end_addr
= flash_sect_addr
+ 0x20000 - 1;
300 debug ("Protect off %08lX ... %08lX\n",
301 (ulong
)flash_sect_addr
, end_addr
);
303 if (flash_sect_protect (0, flash_sect_addr
, end_addr
))
306 puts ("Erasing Flash...");
307 if (flash_sect_erase (flash_sect_addr
, end_addr
))
310 puts ("Writing to Flash... ");
311 rc
= flash_write(env_buffer
, flash_sect_addr
, len
);
319 /* try to re-protect */
320 (void) flash_sect_protect (1, flash_sect_addr
, end_addr
);
324 #endif /* CMD_SAVEENV */
326 #endif /* CFG_ENV_ADDR_REDUND */
328 void env_relocate_spec (void)
330 #if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND)
331 #ifdef CFG_ENV_ADDR_REDUND
332 DECLARE_GLOBAL_DATA_PTR
;
334 if (gd
->env_addr
!= (ulong
)&(flash_addr
->data
))
336 env_t
* etmp
= flash_addr
;
337 ulong ltmp
= end_addr
;
339 flash_addr
= flash_addr_new
;
340 flash_addr_new
= etmp
;
342 end_addr
= end_addr_new
;
346 if (flash_addr_new
->flags
!= obsolete_flag
&&
347 crc32(0, flash_addr_new
->data
, ENV_SIZE
) ==
351 flash_sect_protect (0, (ulong
)flash_addr_new
, end_addr_new
);
352 flash_write((char *)&obsolete_flag
,
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
)
362 flash_sect_protect (0, (ulong
)flash_addr
, end_addr
);
363 flash_write((char *)&active_flag
,
364 (ulong
)&(flash_addr
->flags
),
365 sizeof(flash_addr
->flags
));
366 flash_sect_protect (1, (ulong
)flash_addr
, end_addr
);
369 if (gd
->env_valid
== 2)
370 puts ("*** Warning - some problems detected "
371 "reading environment; recovered successfully\n\n");
372 #endif /* CFG_ENV_ADDR_REDUND */
373 memcpy (env_ptr
, (void*)flash_addr
, CFG_ENV_SIZE
);
374 #endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */
377 #endif /* CFG_ENV_IS_IN_FLASH) */