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(CFG_ENV_IS_IN_NVRAM) && \
56 !defined(CFG_ENV_IS_IN_EEPROM) && \
57 !defined(CFG_ENV_IS_IN_FLASH) && \
58 !defined(CFG_ENV_IS_IN_DATAFLASH) && \
59 !defined(CFG_ENV_IS_IN_NAND) && \
60 !defined(CFG_ENV_IS_IN_ONENAND) && \
61 !defined(CFG_ENV_IS_NOWHERE)
62 # error Define one of CFG_ENV_IS_IN_{NVRAM|EEPROM|FLASH|DATAFLASH|ONENAND|NOWHERE}
66 #define MK_STR(x) XMK_STR(x)
68 /************************************************************************
69 ************************************************************************/
71 /* Function that returns a pointer to a value from the environment */
72 /* (Only memory version supported / needed). */
73 extern uchar *env_get_addr(int);
75 /* Function that updates CRC of the enironment */
76 extern void env_crc_update (void);
78 /************************************************************************
79 ************************************************************************/
82 * Table with supported baudrates (defined in config_xyz.h)
84 static const unsigned long baudrate_table[] = CFG_BAUDRATE_TABLE;
85 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
88 /************************************************************************
89 * Command interface: print one or all environment variables
92 int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
97 if (argc == 1) { /* Print all env variables */
98 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
99 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
101 for (k=i; k<nxt; ++k)
102 putc(env_get_char(k));
106 puts ("\n ** Abort\n");
111 printf("\nEnvironment size: %d/%d bytes\n", i, ENV_SIZE);
116 for (i=1; i<argc; ++i) { /* print single env variables */
117 char *name = argv[i];
121 for (j=0; env_get_char(j) != '\0'; j=nxt+1) {
123 for (nxt=j; env_get_char(nxt) != '\0'; ++nxt)
125 k = envmatch((uchar *)name, j);
132 putc(env_get_char(k++));
137 printf ("## Error: \"%s\" not defined\n", name);
144 /************************************************************************
145 * Set a new environment variable,
146 * or replace or delete an existing one.
148 * This function will ONLY work with a in-RAM copy of the environment
151 int _do_setenv (int flag, int argc, char *argv[])
155 uchar *env, *nxt = NULL;
159 uchar *env_data = env_get_addr(0);
161 if (!env_data) /* need copy in RAM */
166 if (strchr(name, '=')) {
167 printf ("## Error: illegal character '=' in variable name \"%s\"\n", name);
172 * search if variable with this name already exists
175 for (env=env_data; *env; env=nxt+1) {
176 for (nxt=env; *nxt; ++nxt)
178 if ((oldval = envmatch((uchar *)name, env-env_data)) >= 0)
183 * Delete any existing definition
186 #ifndef CONFIG_ENV_OVERWRITE
189 * Ethernet Address and serial# can be set only once,
192 #ifdef CONFIG_HAS_UID
193 /* Allow serial# forced overwrite with 0xdeaf4add flag */
194 if ( ((strcmp (name, "serial#") == 0) && (flag != 0xdeaf4add)) ||
196 if ( (strcmp (name, "serial#") == 0) ||
198 ((strcmp (name, "ethaddr") == 0)
199 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
200 && (strcmp ((char *)env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
201 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
203 printf ("Can't overwrite \"%s\"\n", name);
208 /* Check for console redirection */
209 if (strcmp(name,"stdin") == 0) {
211 } else if (strcmp(name,"stdout") == 0) {
213 } else if (strcmp(name,"stderr") == 0) {
218 if (argc < 3) { /* Cannot delete it! */
219 printf("Can't delete \"%s\"\n", name);
223 /* Try assigning specified device */
224 if (console_assign (console, argv[2]) < 0)
227 #ifdef CONFIG_SERIAL_MULTI
228 if (serial_assign (argv[2]) < 0)
234 * Switch to new baudrate if new baudrate is supported
236 if (strcmp(argv[1],"baudrate") == 0) {
237 int baudrate = simple_strtoul(argv[2], NULL, 10);
239 for (i=0; i<N_BAUDRATES; ++i) {
240 if (baudrate == baudrate_table[i])
243 if (i == N_BAUDRATES) {
244 printf ("## Baudrate %d bps not supported\n",
248 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
251 gd->baudrate = baudrate;
252 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
253 gd->bd->bi_baudrate = baudrate;
264 if (*++nxt == '\0') {
265 if (env > env_data) {
273 if ((*env == '\0') && (*nxt == '\0'))
281 #ifdef CONFIG_NET_MULTI
282 if (strncmp(name, "eth", 3) == 0) {
284 int num = simple_strtoul(name+3, &end, 10);
286 if (strcmp(end, "addr") == 0) {
287 eth_set_enetaddr(num, argv[2]);
294 if ((argc < 3) || argv[2] == NULL) {
300 * Append new definition at the end
302 for (env=env_data; *env || *(env+1); ++env)
308 * "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
310 len = strlen(name) + 2;
311 /* add '=' for first arg, ' ' for all others */
312 for (i=2; i<argc; ++i) {
313 len += strlen(argv[i]) + 1;
315 if (len > (&env_data[ENV_SIZE]-env)) {
316 printf ("## Error: environment overflow, \"%s\" deleted\n", name);
319 while ((*env = *name++) != '\0')
321 for (i=2; i<argc; ++i) {
324 *env = (i==2) ? '=' : ' ';
325 while ((*++env = *val++) != '\0')
329 /* end is marked with double '\0' */
336 * Some variables should be updated when the corresponding
337 * entry in the enviornment is changed
340 if (strcmp(argv[1],"ethaddr") == 0) {
341 char *s = argv[2]; /* always use only one arg */
343 for (i=0; i<6; ++i) {
344 bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
345 if (s) s = (*e) ? e+1 : e;
347 #ifdef CONFIG_NET_MULTI
348 eth_set_enetaddr(0, argv[2]);
353 if (strcmp(argv[1],"ipaddr") == 0) {
354 char *s = argv[2]; /* always use only one arg */
358 for (addr=0, i=0; i<4; ++i) {
359 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
361 addr |= (val & 0xFF);
362 if (s) s = (*e) ? e+1 : e;
364 bd->bi_ip_addr = htonl(addr);
367 if (strcmp(argv[1],"loadaddr") == 0) {
368 load_addr = simple_strtoul(argv[2], NULL, 16);
371 #if defined(CONFIG_CMD_NET)
372 if (strcmp(argv[1],"bootfile") == 0) {
373 copy_filename (BootFile, argv[2], sizeof(BootFile));
378 #ifdef CONFIG_AMIGAONEG3SE
379 if (strcmp(argv[1], "vga_fg_color") == 0 ||
380 strcmp(argv[1], "vga_bg_color") == 0 ) {
381 extern void video_set_color(unsigned char attr);
382 extern unsigned char video_get_attr(void);
384 video_set_color(video_get_attr());
387 #endif /* CONFIG_AMIGAONEG3SE */
392 void setenv (char *varname, char *varvalue)
394 char *argv[4] = { "setenv", varname, varvalue, NULL };
395 if (varvalue == NULL)
396 _do_setenv (0, 2, argv);
398 _do_setenv (0, 3, argv);
401 #ifdef CONFIG_HAS_UID
402 void forceenv (char *varname, char *varvalue)
404 char *argv[4] = { "forceenv", varname, varvalue, NULL };
405 _do_setenv (0xdeaf4add, 3, argv);
409 int do_setenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
412 printf ("Usage:\n%s\n", cmdtp->usage);
416 return _do_setenv (flag, argc, argv);
419 /************************************************************************
420 * Prompt for environment variable
423 #if defined(CONFIG_CMD_ASKENV)
424 int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
426 extern char console_buffer[CFG_CBSIZE];
427 char message[CFG_CBSIZE];
428 int size = CFG_CBSIZE - 1;
432 local_args[0] = argv[0];
433 local_args[1] = argv[1];
434 local_args[2] = NULL;
435 local_args[3] = NULL;
438 printf ("Usage:\n%s\n", cmdtp->usage);
441 /* Check the syntax */
444 printf ("Usage:\n%s\n", cmdtp->usage);
447 case 2: /* askenv envname */
448 sprintf (message, "Please enter '%s':", argv[1]);
451 case 3: /* askenv envname size */
452 sprintf (message, "Please enter '%s':", argv[1]);
453 size = simple_strtoul (argv[2], NULL, 10);
456 default: /* askenv envname message1 ... messagen size */
461 for (i = 2; i < argc - 1; i++) {
463 message[pos++] = ' ';
465 strcpy (message+pos, argv[i]);
466 pos += strlen(argv[i]);
469 size = simple_strtoul (argv[argc - 1], NULL, 10);
474 if (size >= CFG_CBSIZE)
475 size = CFG_CBSIZE - 1;
480 /* prompt for input */
481 len = readline (message);
484 console_buffer[size] = '\0';
487 if (console_buffer[0] != '\0') {
488 local_args[2] = console_buffer;
492 /* Continue calling setenv code */
493 return _do_setenv (flag, len, local_args);
497 /************************************************************************
498 * Look up variable from environment,
499 * return address of storage for that variable,
500 * or NULL if not found
503 char *getenv (char *name)
509 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
512 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
513 if (nxt >= CFG_ENV_SIZE) {
517 if ((val=envmatch((uchar *)name, i)) < 0)
519 return ((char *)env_get_addr(val));
525 int getenv_r (char *name, char *buf, unsigned len)
529 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
532 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
533 if (nxt >= CFG_ENV_SIZE) {
537 if ((val=envmatch((uchar *)name, i)) < 0)
539 /* found; copy out */
541 while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
550 #if ((defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) \
551 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH)) \
552 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND)) \
553 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_ONENAND))) \
554 && !defined(CFG_ENV_IS_NOWHERE))
555 int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
557 extern char * env_name_spec;
559 printf ("Saving Environment to %s...\n", env_name_spec);
561 return (saveenv() ? 1 : 0);
567 /************************************************************************
568 * Match a name / name=value pair
570 * s1 is either a simple 'name', or a 'name=value' pair.
571 * i2 is the environment index for a 'name2=value2' pair.
572 * If the names match, return the index for the value2, else NULL.
575 int envmatch (uchar *s1, int i2)
578 while (*s1 == env_get_char(i2++))
581 if (*s1 == '\0' && env_get_char(i2-1) == '=')
587 /**************************************************/
590 printenv, CFG_MAXARGS, 1, do_printenv,
591 "printenv- print environment variables\n",
592 "\n - print values of all environment variables\n"
593 "printenv name ...\n"
594 " - print value of environment variable 'name'\n"
598 setenv, CFG_MAXARGS, 0, do_setenv,
599 "setenv - set environment variables\n",
601 " - set environment variable 'name' to 'value ...'\n"
603 " - delete environment variable 'name'\n"
606 #if ((defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) \
607 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH)) \
608 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND)) \
609 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_ONENAND))) \
610 && !defined(CFG_ENV_IS_NOWHERE))
612 saveenv, 1, 0, do_saveenv,
613 "saveenv - save environment variables to persistent storage\n",
619 #if defined(CONFIG_CMD_ASKENV)
622 askenv, CFG_MAXARGS, 1, do_askenv,
623 "askenv - get environment variables from stdin\n",
624 "name [message] [size]\n"
625 " - get environment variable 'name' from stdin (max 'size' chars)\n"
627 " - get environment variable 'name' from stdin\n"
629 " - get environment variable 'name' from stdin (max 'size' chars)\n"
630 "askenv name [message] size\n"
631 " - display 'message' string and get environment variable 'name'"
632 "from stdin (max 'size' chars)\n"
636 #if defined(CONFIG_CMD_RUN)
637 int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
639 run, CFG_MAXARGS, 1, do_run,
640 "run - run commands in an environment variable\n",
642 " - run the commands in the environment variable(s) 'var'\n"