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,
27 /**************************************************************************
29 * Support for persistent environment data
31 * The "environment" is stored as a list of '\0' terminated
32 * "name=value" strings. The end of the list is marked by a double
33 * '\0'. New entries are always added at the end. Deleting an entry
34 * shifts the remaining entries to the front. Replacing an entry is a
35 * combination of deleting the old value and adding the new one.
37 * The environment is preceeded by a 32 bit CRC over the data part.
39 **************************************************************************
44 #include <environment.h>
47 #include <linux/stddef.h>
48 #include <asm/byteorder.h>
49 #if defined(CONFIG_CMD_NET)
53 DECLARE_GLOBAL_DATA_PTR
;
55 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
56 !defined(CONFIG_ENV_IS_IN_FLASH) && \
57 !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
58 !defined(CONFIG_ENV_IS_IN_MG_DISK) && \
59 !defined(CONFIG_ENV_IS_IN_NAND) && \
60 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
61 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
62 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
63 !defined(CONFIG_ENV_IS_NOWHERE)
64 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
65 SPI_FLASH|MG_DISK|NVRAM|NOWHERE}
69 #define MK_STR(x) XMK_STR(x)
71 /************************************************************************
72 ************************************************************************/
75 * Table with supported baudrates (defined in config_xyz.h)
77 static const unsigned long baudrate_table
[] = CONFIG_SYS_BAUDRATE_TABLE
;
78 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
81 * This variable is incremented on each do_setenv (), so it can
82 * be used via get_env_id() as an indication, if the environment
83 * has changed or not. So it is possible to reread an environment
84 * variable only if the environment was changed ... done so for
85 * example in NetInitLoop()
87 static int env_id
= 1;
93 /************************************************************************
94 * Command interface: print one or all environment variables
98 * state 0: finish printing this string and return (matched!)
99 * state 1: no matching to be done; print everything
100 * state 2: continue searching for matched name
102 static int printenv(char *name
, int state
)
110 while (state
&& env_get_char(i
) != '\0') {
111 if (state
== 2 && envmatch((uchar
*)name
, i
) >= 0)
116 buf
[j
++] = c
= env_get_char(i
++);
117 if (j
== sizeof(buf
) - 1) {
139 int do_printenv (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
145 /* print all env vars */
146 rcode
= printenv(NULL
, 1);
149 printf("\nEnvironment size: %d/%ld bytes\n",
150 rcode
, (ulong
)ENV_SIZE
);
154 /* print selected env vars */
155 for (i
= 1; i
< argc
; ++i
) {
156 char *name
= argv
[i
];
157 if (printenv(name
, 2)) {
158 printf("## Error: \"%s\" not defined\n", name
);
166 /************************************************************************
167 * Set a new environment variable,
168 * or replace or delete an existing one.
170 * This function will ONLY work with a in-RAM copy of the environment
173 int _do_setenv (int flag
, int argc
, char *argv
[])
177 uchar
*env
, *nxt
= NULL
;
181 uchar
*env_data
= env_get_addr(0);
183 if (!env_data
) /* need copy in RAM */
188 if (strchr(name
, '=')) {
189 printf ("## Error: illegal character '=' in variable name \"%s\"\n", name
);
195 * search if variable with this name already exists
198 for (env
=env_data
; *env
; env
=nxt
+1) {
199 for (nxt
=env
; *nxt
; ++nxt
)
201 if ((oldval
= envmatch((uchar
*)name
, env
-env_data
)) >= 0)
206 * Delete any existing definition
209 #ifndef CONFIG_ENV_OVERWRITE
212 * Ethernet Address and serial# can be set only once,
216 #ifdef CONFIG_HAS_UID
217 /* Allow serial# forced overwrite with 0xdeaf4add flag */
218 ((strcmp (name
, "serial#") == 0) && (flag
!= 0xdeaf4add)) ||
220 (strcmp (name
, "serial#") == 0) ||
222 ((strcmp (name
, "ethaddr") == 0)
223 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
224 && (strcmp ((char *)env_get_addr(oldval
),MK_STR(CONFIG_ETHADDR
)) != 0)
225 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
227 printf ("Can't overwrite \"%s\"\n", name
);
232 /* Check for console redirection */
233 if (strcmp(name
,"stdin") == 0) {
235 } else if (strcmp(name
,"stdout") == 0) {
237 } else if (strcmp(name
,"stderr") == 0) {
242 if (argc
< 3) { /* Cannot delete it! */
243 printf("Can't delete \"%s\"\n", name
);
247 #ifdef CONFIG_CONSOLE_MUX
248 i
= iomux_doenv(console
, argv
[2]);
252 /* Try assigning specified device */
253 if (console_assign (console
, argv
[2]) < 0)
256 #ifdef CONFIG_SERIAL_MULTI
257 if (serial_assign (argv
[2]) < 0)
260 #endif /* CONFIG_CONSOLE_MUX */
264 * Switch to new baudrate if new baudrate is supported
266 if (strcmp(argv
[1],"baudrate") == 0) {
267 int baudrate
= simple_strtoul(argv
[2], NULL
, 10);
269 for (i
=0; i
<N_BAUDRATES
; ++i
) {
270 if (baudrate
== baudrate_table
[i
])
273 if (i
== N_BAUDRATES
) {
274 printf ("## Baudrate %d bps not supported\n",
278 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
281 gd
->baudrate
= baudrate
;
282 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
283 gd
->bd
->bi_baudrate
= baudrate
;
294 if (*++nxt
== '\0') {
295 if (env
> env_data
) {
303 if ((*env
== '\0') && (*nxt
== '\0'))
312 if ((argc
< 3) || argv
[2] == NULL
) {
318 * Append new definition at the end
320 for (env
=env_data
; *env
|| *(env
+1); ++env
)
326 * "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
328 len
= strlen(name
) + 2;
329 /* add '=' for first arg, ' ' for all others */
330 for (i
=2; i
<argc
; ++i
) {
331 len
+= strlen(argv
[i
]) + 1;
333 if (len
> (&env_data
[ENV_SIZE
]-env
)) {
334 printf ("## Error: environment overflow, \"%s\" deleted\n", name
);
337 while ((*env
= *name
++) != '\0')
339 for (i
=2; i
<argc
; ++i
) {
342 *env
= (i
==2) ? '=' : ' ';
343 while ((*++env
= *val
++) != '\0')
347 /* end is marked with double '\0' */
354 * Some variables should be updated when the corresponding
355 * entry in the enviornment is changed
358 if (strcmp(argv
[1],"ethaddr") == 0)
361 if (strcmp(argv
[1],"ipaddr") == 0) {
362 char *s
= argv
[2]; /* always use only one arg */
366 for (addr
=0, i
=0; i
<4; ++i
) {
367 ulong val
= s
? simple_strtoul(s
, &e
, 10) : 0;
369 addr
|= (val
& 0xFF);
370 if (s
) s
= (*e
) ? e
+1 : e
;
372 bd
->bi_ip_addr
= htonl(addr
);
375 if (strcmp(argv
[1],"loadaddr") == 0) {
376 load_addr
= simple_strtoul(argv
[2], NULL
, 16);
379 #if defined(CONFIG_CMD_NET)
380 if (strcmp(argv
[1],"bootfile") == 0) {
381 copy_filename (BootFile
, argv
[2], sizeof(BootFile
));
386 #ifdef CONFIG_AMIGAONEG3SE
387 if (strcmp(argv
[1], "vga_fg_color") == 0 ||
388 strcmp(argv
[1], "vga_bg_color") == 0 ) {
389 extern void video_set_color(unsigned char attr
);
390 extern unsigned char video_get_attr(void);
392 video_set_color(video_get_attr());
395 #endif /* CONFIG_AMIGAONEG3SE */
400 int setenv (char *varname
, char *varvalue
)
402 char *argv
[4] = { "setenv", varname
, varvalue
, NULL
};
403 if (varvalue
== NULL
)
404 return _do_setenv (0, 2, argv
);
406 return _do_setenv (0, 3, argv
);
409 #ifdef CONFIG_HAS_UID
410 void forceenv (char *varname
, char *varvalue
)
412 char *argv
[4] = { "forceenv", varname
, varvalue
, NULL
};
413 _do_setenv (0xdeaf4add, 3, argv
);
417 int do_setenv (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
424 return _do_setenv (flag
, argc
, argv
);
427 /************************************************************************
428 * Prompt for environment variable
431 #if defined(CONFIG_CMD_ASKENV)
432 int do_askenv ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
434 extern char console_buffer
[CONFIG_SYS_CBSIZE
];
435 char message
[CONFIG_SYS_CBSIZE
];
436 int size
= CONFIG_SYS_CBSIZE
- 1;
440 local_args
[0] = argv
[0];
441 local_args
[1] = argv
[1];
442 local_args
[2] = NULL
;
443 local_args
[3] = NULL
;
449 /* Check the syntax */
455 case 2: /* askenv envname */
456 sprintf (message
, "Please enter '%s':", argv
[1]);
459 case 3: /* askenv envname size */
460 sprintf (message
, "Please enter '%s':", argv
[1]);
461 size
= simple_strtoul (argv
[2], NULL
, 10);
464 default: /* askenv envname message1 ... messagen size */
469 for (i
= 2; i
< argc
- 1; i
++) {
471 message
[pos
++] = ' ';
473 strcpy (message
+pos
, argv
[i
]);
474 pos
+= strlen(argv
[i
]);
477 size
= simple_strtoul (argv
[argc
- 1], NULL
, 10);
482 if (size
>= CONFIG_SYS_CBSIZE
)
483 size
= CONFIG_SYS_CBSIZE
- 1;
488 /* prompt for input */
489 len
= readline (message
);
492 console_buffer
[size
] = '\0';
495 if (console_buffer
[0] != '\0') {
496 local_args
[2] = console_buffer
;
500 /* Continue calling setenv code */
501 return _do_setenv (flag
, len
, local_args
);
505 /************************************************************************
506 * Look up variable from environment,
507 * return address of storage for that variable,
508 * or NULL if not found
511 char *getenv (char *name
)
517 for (i
=0; env_get_char(i
) != '\0'; i
=nxt
+1) {
520 for (nxt
=i
; env_get_char(nxt
) != '\0'; ++nxt
) {
521 if (nxt
>= CONFIG_ENV_SIZE
) {
525 if ((val
=envmatch((uchar
*)name
, i
)) < 0)
527 return ((char *)env_get_addr(val
));
533 int getenv_r (char *name
, char *buf
, unsigned len
)
537 for (i
=0; env_get_char(i
) != '\0'; i
=nxt
+1) {
540 for (nxt
=i
; env_get_char(nxt
) != '\0'; ++nxt
) {
541 if (nxt
>= CONFIG_ENV_SIZE
) {
545 if ((val
=envmatch((uchar
*)name
, i
)) < 0)
547 /* found; copy out */
549 while ((len
> n
++) && (*buf
++ = env_get_char(val
++)) != '\0')
558 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
560 int do_saveenv (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
562 extern char * env_name_spec
;
564 printf ("Saving Environment to %s...\n", env_name_spec
);
566 return (saveenv() ? 1 : 0);
570 saveenv
, 1, 0, do_saveenv
,
571 "save environment variables to persistent storage",
578 /************************************************************************
579 * Match a name / name=value pair
581 * s1 is either a simple 'name', or a 'name=value' pair.
582 * i2 is the environment index for a 'name2=value2' pair.
583 * If the names match, return the index for the value2, else NULL.
586 int envmatch (uchar
*s1
, int i2
)
589 while (*s1
== env_get_char(i2
++))
592 if (*s1
== '\0' && env_get_char(i2
-1) == '=')
598 /**************************************************/
601 printenv
, CONFIG_SYS_MAXARGS
, 1, do_printenv
,
602 "print environment variables",
603 "\n - print values of all environment variables\n"
604 "printenv name ...\n"
605 " - print value of environment variable 'name'"
609 setenv
, CONFIG_SYS_MAXARGS
, 0, do_setenv
,
610 "set environment variables",
612 " - set environment variable 'name' to 'value ...'\n"
614 " - delete environment variable 'name'"
617 #if defined(CONFIG_CMD_ASKENV)
620 askenv
, CONFIG_SYS_MAXARGS
, 1, do_askenv
,
621 "get environment variables from stdin",
622 "name [message] [size]\n"
623 " - get environment variable 'name' from stdin (max 'size' chars)\n"
625 " - get environment variable 'name' from stdin\n"
627 " - get environment variable 'name' from stdin (max 'size' chars)\n"
628 "askenv name [message] size\n"
629 " - display 'message' string and get environment variable 'name'"
630 "from stdin (max 'size' chars)"
634 #if defined(CONFIG_CMD_RUN)
635 int do_run (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[]);
637 run
, CONFIG_SYS_MAXARGS
, 1, do_run
,
638 "run commands in an environment variable",
640 " - run the commands in the environment variable(s) 'var'"