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git.ipfire.org Git - people/ms/u-boot.git/blob - common/env_flash.c
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 * SPDX-License-Identifier: GPL-2.0+
15 #include <environment.h>
16 #include <linux/stddef.h>
21 DECLARE_GLOBAL_DATA_PTR
;
23 #if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
25 #elif defined(CONFIG_ENV_ADDR_REDUND)
26 #error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
29 #if defined(CONFIG_ENV_SIZE_REDUND) && \
30 (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
31 #error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
34 char *env_name_spec
= "Flash";
36 #ifdef ENV_IS_EMBEDDED
37 env_t
*env_ptr
= &environment
;
39 static env_t
*flash_addr
= (env_t
*)CONFIG_ENV_ADDR
;
41 #else /* ! ENV_IS_EMBEDDED */
43 env_t
*env_ptr
= (env_t
*)CONFIG_ENV_ADDR
;
44 static env_t
*flash_addr
= (env_t
*)CONFIG_ENV_ADDR
;
45 #endif /* ENV_IS_EMBEDDED */
47 #if defined(CMD_SAVEENV) || defined(CONFIG_ENV_ADDR_REDUND)
48 /* CONFIG_ENV_ADDR is supposed to be on sector boundary */
49 static ulong end_addr
= CONFIG_ENV_ADDR
+ CONFIG_ENV_SECT_SIZE
- 1;
52 #ifdef CONFIG_ENV_ADDR_REDUND
53 static env_t
*flash_addr_new
= (env_t
*)CONFIG_ENV_ADDR_REDUND
;
55 /* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
56 static ulong end_addr_new
= CONFIG_ENV_ADDR_REDUND
+ CONFIG_ENV_SECT_SIZE
- 1;
57 #endif /* CONFIG_ENV_ADDR_REDUND */
60 #ifdef CONFIG_ENV_ADDR_REDUND
63 int crc1_ok
= 0, crc2_ok
= 0;
65 uchar flag1
= flash_addr
->flags
;
66 uchar flag2
= flash_addr_new
->flags
;
68 ulong addr_default
= (ulong
)&default_environment
[0];
69 ulong addr1
= (ulong
)&(flash_addr
->data
);
70 ulong addr2
= (ulong
)&(flash_addr_new
->data
);
72 crc1_ok
= crc32(0, flash_addr
->data
, ENV_SIZE
) == flash_addr
->crc
;
74 crc32(0, flash_addr_new
->data
, ENV_SIZE
) == flash_addr_new
->crc
;
76 if (crc1_ok
&& !crc2_ok
) {
79 } else if (!crc1_ok
&& crc2_ok
) {
82 } else if (!crc1_ok
&& !crc2_ok
) {
83 gd
->env_addr
= addr_default
;
85 } else if (flag1
== ACTIVE_FLAG
&& flag2
== OBSOLETE_FLAG
) {
88 } else if (flag1
== OBSOLETE_FLAG
&& flag2
== ACTIVE_FLAG
) {
91 } else if (flag1
== flag2
) {
94 } else if (flag1
== 0xFF) {
97 } else if (flag2
== 0xFF) {
109 char *saved_data
= NULL
;
110 char flag
= OBSOLETE_FLAG
, new_flag
= ACTIVE_FLAG
;
112 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
116 debug("Protect off %08lX ... %08lX\n", (ulong
)flash_addr
, end_addr
);
118 if (flash_sect_protect(0, (ulong
)flash_addr
, end_addr
))
121 debug("Protect off %08lX ... %08lX\n",
122 (ulong
)flash_addr_new
, end_addr_new
);
124 if (flash_sect_protect(0, (ulong
)flash_addr_new
, end_addr_new
))
127 rc
= env_export(&env_new
);
130 env_new
.flags
= new_flag
;
132 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
133 up_data
= end_addr_new
+ 1 - ((long)flash_addr_new
+ CONFIG_ENV_SIZE
);
134 debug("Data to save 0x%lX\n", up_data
);
136 saved_data
= malloc(up_data
);
137 if (saved_data
== NULL
) {
138 printf("Unable to save the rest of sector (%ld)\n",
143 (void *)((long)flash_addr_new
+ CONFIG_ENV_SIZE
),
145 debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
146 (long)flash_addr_new
+ CONFIG_ENV_SIZE
,
147 up_data
, saved_data
);
150 puts("Erasing Flash...");
151 debug(" %08lX ... %08lX ...", (ulong
)flash_addr_new
, end_addr_new
);
153 if (flash_sect_erase((ulong
)flash_addr_new
, end_addr_new
))
156 puts("Writing to Flash... ");
157 debug(" %08lX ... %08lX ...",
158 (ulong
)&(flash_addr_new
->data
),
159 sizeof(env_ptr
->data
) + (ulong
)&(flash_addr_new
->data
));
160 rc
= flash_write((char *)&env_new
, (ulong
)flash_addr_new
,
165 rc
= flash_write(&flag
, (ulong
)&(flash_addr
->flags
),
166 sizeof(flash_addr
->flags
));
170 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
171 if (up_data
) { /* restore the rest of sector */
172 debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
173 (long)flash_addr_new
+ CONFIG_ENV_SIZE
, up_data
);
174 if (flash_write(saved_data
,
175 (long)flash_addr_new
+ CONFIG_ENV_SIZE
,
183 env_t
*etmp
= flash_addr
;
184 ulong ltmp
= end_addr
;
186 flash_addr
= flash_addr_new
;
187 flash_addr_new
= etmp
;
189 end_addr
= end_addr_new
;
200 /* try to re-protect */
201 flash_sect_protect(1, (ulong
)flash_addr
, end_addr
);
202 flash_sect_protect(1, (ulong
)flash_addr_new
, end_addr_new
);
206 #endif /* CMD_SAVEENV */
208 #else /* ! CONFIG_ENV_ADDR_REDUND */
212 if (crc32(0, env_ptr
->data
, ENV_SIZE
) == env_ptr
->crc
) {
213 gd
->env_addr
= (ulong
)&(env_ptr
->data
);
218 gd
->env_addr
= (ulong
)&default_environment
[0];
228 char *saved_data
= NULL
;
229 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
232 up_data
= end_addr
+ 1 - ((long)flash_addr
+ CONFIG_ENV_SIZE
);
233 debug("Data to save 0x%lx\n", up_data
);
235 saved_data
= malloc(up_data
);
236 if (saved_data
== NULL
) {
237 printf("Unable to save the rest of sector (%ld)\n",
242 (void *)((long)flash_addr
+ CONFIG_ENV_SIZE
), up_data
);
243 debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
244 (ulong
)flash_addr
+ CONFIG_ENV_SIZE
,
248 #endif /* CONFIG_ENV_SECT_SIZE */
250 debug("Protect off %08lX ... %08lX\n", (ulong
)flash_addr
, end_addr
);
252 if (flash_sect_protect(0, (long)flash_addr
, end_addr
))
255 rc
= env_export(&env_new
);
259 puts("Erasing Flash...");
260 if (flash_sect_erase((long)flash_addr
, end_addr
))
263 puts("Writing to Flash... ");
264 rc
= flash_write((char *)&env_new
, (long)flash_addr
, CONFIG_ENV_SIZE
);
268 #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
269 if (up_data
) { /* restore the rest of sector */
270 debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
271 (ulong
)flash_addr
+ CONFIG_ENV_SIZE
, up_data
);
272 if (flash_write(saved_data
,
273 (long)flash_addr
+ CONFIG_ENV_SIZE
,
286 /* try to re-protect */
287 flash_sect_protect(1, (long)flash_addr
, end_addr
);
290 #endif /* CMD_SAVEENV */
292 #endif /* CONFIG_ENV_ADDR_REDUND */
294 void env_relocate_spec(void)
296 #ifdef CONFIG_ENV_ADDR_REDUND
297 if (gd
->env_addr
!= (ulong
)&(flash_addr
->data
)) {
298 env_t
*etmp
= flash_addr
;
299 ulong ltmp
= end_addr
;
301 flash_addr
= flash_addr_new
;
302 flash_addr_new
= etmp
;
304 end_addr
= end_addr_new
;
308 if (flash_addr_new
->flags
!= OBSOLETE_FLAG
&&
309 crc32(0, flash_addr_new
->data
, ENV_SIZE
) == flash_addr_new
->crc
) {
310 char flag
= OBSOLETE_FLAG
;
313 flash_sect_protect(0, (ulong
)flash_addr_new
, end_addr_new
);
315 (ulong
)&(flash_addr_new
->flags
),
316 sizeof(flash_addr_new
->flags
));
317 flash_sect_protect(1, (ulong
)flash_addr_new
, end_addr_new
);
320 if (flash_addr
->flags
!= ACTIVE_FLAG
&&
321 (flash_addr
->flags
& ACTIVE_FLAG
) == ACTIVE_FLAG
) {
322 char flag
= ACTIVE_FLAG
;
325 flash_sect_protect(0, (ulong
)flash_addr
, end_addr
);
327 (ulong
)&(flash_addr
->flags
),
328 sizeof(flash_addr
->flags
));
329 flash_sect_protect(1, (ulong
)flash_addr
, end_addr
);
332 if (gd
->env_valid
== 2)
333 puts("*** Warning - some problems detected "
334 "reading environment; recovered successfully\n\n");
335 #endif /* CONFIG_ENV_ADDR_REDUND */
337 env_import((char *)flash_addr
, 1);