1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
|
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
*/
/* #define DEBUG */
#include <common.h>
#include <command.h>
#include <env.h>
#include <environment.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <search.h>
#include <errno.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SPL_BUILD
# if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
# define CMD_SAVEENV
# elif defined(CONFIG_ENV_ADDR_REDUND)
# error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
# endif
#endif
#if defined(CONFIG_ENV_SIZE_REDUND) && \
(CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
#endif
/* TODO(sjg@chromium.org): Figure out all these special cases */
#if (!defined(CONFIG_MICROBLAZE) && !defined(CONFIG_ARCH_ZYNQ) && \
!defined(CONFIG_TARGET_MCCMON6) && !defined(CONFIG_TARGET_X600) && \
!defined(CONFIG_TARGET_EDMINIV2)) || \
!defined(CONFIG_SPL_BUILD)
#define LOADENV
#endif
#if !defined(CONFIG_TARGET_X600) || !defined(CONFIG_SPL_BUILD)
#define INITENV
#endif
#if defined(CONFIG_ENV_ADDR_REDUND) && defined(CMD_SAVEENV) || \
!defined(CONFIG_ENV_ADDR_REDUND) && defined(INITENV)
#ifdef ENV_IS_EMBEDDED
static env_t *env_ptr = &embedded_environment;
#else /* ! ENV_IS_EMBEDDED */
static env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
#endif /* ENV_IS_EMBEDDED */
#endif
static __maybe_unused env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
static ulong __maybe_unused end_addr =
CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
#ifdef CONFIG_ENV_ADDR_REDUND
static env_t __maybe_unused *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
static ulong __maybe_unused end_addr_new =
CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
#endif /* CONFIG_ENV_ADDR_REDUND */
#ifdef CONFIG_ENV_ADDR_REDUND
#ifdef INITENV
static int env_flash_init(void)
{
int crc1_ok = 0, crc2_ok = 0;
uchar flag1 = flash_addr->flags;
uchar flag2 = flash_addr_new->flags;
ulong addr_default = (ulong)&default_environment[0];
ulong addr1 = (ulong)&(flash_addr->data);
ulong addr2 = (ulong)&(flash_addr_new->data);
crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
crc2_ok =
crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
if (crc1_ok && !crc2_ok) {
gd->env_addr = addr1;
gd->env_valid = ENV_VALID;
} else if (!crc1_ok && crc2_ok) {
gd->env_addr = addr2;
gd->env_valid = ENV_VALID;
} else if (!crc1_ok && !crc2_ok) {
gd->env_addr = addr_default;
gd->env_valid = ENV_INVALID;
} else if (flag1 == ENV_REDUND_ACTIVE &&
flag2 == ENV_REDUND_OBSOLETE) {
gd->env_addr = addr1;
gd->env_valid = ENV_VALID;
} else if (flag1 == ENV_REDUND_OBSOLETE &&
flag2 == ENV_REDUND_ACTIVE) {
gd->env_addr = addr2;
gd->env_valid = ENV_VALID;
} else if (flag1 == flag2) {
gd->env_addr = addr1;
gd->env_valid = ENV_REDUND;
} else if (flag1 == 0xFF) {
gd->env_addr = addr1;
gd->env_valid = ENV_REDUND;
} else if (flag2 == 0xFF) {
gd->env_addr = addr2;
gd->env_valid = ENV_REDUND;
}
return 0;
}
#endif
#ifdef CMD_SAVEENV
static int env_flash_save(void)
{
env_t env_new;
char *saved_data = NULL;
char flag = ENV_REDUND_OBSOLETE, new_flag = ENV_REDUND_ACTIVE;
int rc = 1;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ulong up_data = 0;
#endif
debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
goto done;
debug("Protect off %08lX ... %08lX\n",
(ulong)flash_addr_new, end_addr_new);
if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
goto done;
rc = env_export(&env_new);
if (rc)
return rc;
env_new.flags = new_flag;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
debug("Data to save 0x%lX\n", up_data);
if (up_data) {
saved_data = malloc(up_data);
if (saved_data == NULL) {
printf("Unable to save the rest of sector (%ld)\n",
up_data);
goto done;
}
memcpy(saved_data,
(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
up_data);
debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
(long)flash_addr_new + CONFIG_ENV_SIZE,
up_data, saved_data);
}
#endif
puts("Erasing Flash...");
debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
goto done;
puts("Writing to Flash... ");
debug(" %08lX ... %08lX ...",
(ulong)&(flash_addr_new->data),
sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
sizeof(env_new));
if (rc)
goto perror;
rc = flash_write(&flag, (ulong)&(flash_addr->flags),
sizeof(flash_addr->flags));
if (rc)
goto perror;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
if (up_data) { /* restore the rest of sector */
debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
if (flash_write(saved_data,
(long)flash_addr_new + CONFIG_ENV_SIZE,
up_data))
goto perror;
}
#endif
puts("done\n");
{
env_t *etmp = flash_addr;
ulong ltmp = end_addr;
flash_addr = flash_addr_new;
flash_addr_new = etmp;
end_addr = end_addr_new;
end_addr_new = ltmp;
}
rc = 0;
goto done;
perror:
flash_perror(rc);
done:
if (saved_data)
free(saved_data);
/* try to re-protect */
flash_sect_protect(1, (ulong)flash_addr, end_addr);
flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
return rc;
}
#endif /* CMD_SAVEENV */
#else /* ! CONFIG_ENV_ADDR_REDUND */
#ifdef INITENV
static int env_flash_init(void)
{
if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
gd->env_addr = (ulong)&(env_ptr->data);
gd->env_valid = ENV_VALID;
return 0;
}
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = ENV_INVALID;
return 0;
}
#endif
#ifdef CMD_SAVEENV
static int env_flash_save(void)
{
env_t env_new;
int rc = 1;
char *saved_data = NULL;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ulong up_data = 0;
up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
debug("Data to save 0x%lx\n", up_data);
if (up_data) {
saved_data = malloc(up_data);
if (saved_data == NULL) {
printf("Unable to save the rest of sector (%ld)\n",
up_data);
goto done;
}
memcpy(saved_data,
(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
(ulong)flash_addr + CONFIG_ENV_SIZE,
up_data,
(ulong)saved_data);
}
#endif /* CONFIG_ENV_SECT_SIZE */
debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
if (flash_sect_protect(0, (long)flash_addr, end_addr))
goto done;
rc = env_export(&env_new);
if (rc)
goto done;
puts("Erasing Flash...");
if (flash_sect_erase((long)flash_addr, end_addr))
goto done;
puts("Writing to Flash... ");
rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
if (rc != 0)
goto perror;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
if (up_data) { /* restore the rest of sector */
debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
if (flash_write(saved_data,
(long)flash_addr + CONFIG_ENV_SIZE,
up_data))
goto perror;
}
#endif
puts("done\n");
rc = 0;
goto done;
perror:
flash_perror(rc);
done:
if (saved_data)
free(saved_data);
/* try to re-protect */
flash_sect_protect(1, (long)flash_addr, end_addr);
return rc;
}
#endif /* CMD_SAVEENV */
#endif /* CONFIG_ENV_ADDR_REDUND */
#ifdef LOADENV
static int env_flash_load(void)
{
#ifdef CONFIG_ENV_ADDR_REDUND
if (gd->env_addr != (ulong)&(flash_addr->data)) {
env_t *etmp = flash_addr;
ulong ltmp = end_addr;
flash_addr = flash_addr_new;
flash_addr_new = etmp;
end_addr = end_addr_new;
end_addr_new = ltmp;
}
if (flash_addr_new->flags != ENV_REDUND_OBSOLETE &&
crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
char flag = ENV_REDUND_OBSOLETE;
gd->env_valid = ENV_REDUND;
flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
flash_write(&flag,
(ulong)&(flash_addr_new->flags),
sizeof(flash_addr_new->flags));
flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
}
if (flash_addr->flags != ENV_REDUND_ACTIVE &&
(flash_addr->flags & ENV_REDUND_ACTIVE) == ENV_REDUND_ACTIVE) {
char flag = ENV_REDUND_ACTIVE;
gd->env_valid = ENV_REDUND;
flash_sect_protect(0, (ulong)flash_addr, end_addr);
flash_write(&flag,
(ulong)&(flash_addr->flags),
sizeof(flash_addr->flags));
flash_sect_protect(1, (ulong)flash_addr, end_addr);
}
if (gd->env_valid == ENV_REDUND)
puts("*** Warning - some problems detected "
"reading environment; recovered successfully\n\n");
#endif /* CONFIG_ENV_ADDR_REDUND */
return env_import((char *)flash_addr, 1);
}
#endif /* LOADENV */
U_BOOT_ENV_LOCATION(flash) = {
.location = ENVL_FLASH,
ENV_NAME("Flash")
#ifdef LOADENV
.load = env_flash_load,
#endif
#ifdef CMD_SAVEENV
.save = env_save_ptr(env_flash_save),
#endif
#ifdef INITENV
.init = env_flash_init,
#endif
};
|
