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 (CONFIG_COMMANDS & CFG_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_NOWHERE)
61 # error Define one of CFG_ENV_IS_IN_{NVRAM|EEPROM|FLASH|DATAFLASH|NOWHERE}
65 #define MK_STR(x) XMK_STR(x)
67 /************************************************************************
68 ************************************************************************/
70 /* Function that returns a character from the environment */
71 extern uchar (*env_get_char)(int);
73 /* Function that returns a pointer to a value from the environment */
74 /* (Only memory version supported / needed). */
75 extern uchar *env_get_addr(int);
77 /* Function that updates CRC of the enironment */
78 extern void env_crc_update (void);
80 /************************************************************************
81 ************************************************************************/
83 static int envmatch (uchar *, int);
86 * Table with supported baudrates (defined in config_xyz.h)
88 static const unsigned long baudrate_table[] = CFG_BAUDRATE_TABLE;
89 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
92 /************************************************************************
93 * Command interface: print one or all environment variables
96 int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
101 if (argc == 1) { /* Print all env variables */
102 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
103 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
105 for (k=i; k<nxt; ++k)
106 putc(env_get_char(k));
110 puts ("\n ** Abort\n");
115 printf("\nEnvironment size: %d/%d bytes\n", i, ENV_SIZE);
120 for (i=1; i<argc; ++i) { /* print single env variables */
121 char *name = argv[i];
125 for (j=0; env_get_char(j) != '\0'; j=nxt+1) {
127 for (nxt=j; env_get_char(nxt) != '\0'; ++nxt)
129 k = envmatch((uchar *)name, j);
136 putc(env_get_char(k++));
141 printf ("## Error: \"%s\" not defined\n", name);
148 /************************************************************************
149 * Set a new environment variable,
150 * or replace or delete an existing one.
152 * This function will ONLY work with a in-RAM copy of the environment
155 int _do_setenv (int flag, int argc, char *argv[])
159 uchar *env, *nxt = NULL;
163 uchar *env_data = env_get_addr(0);
165 if (!env_data) /* need copy in RAM */
170 if (strchr(name, '=')) {
171 printf ("## Error: illegal character '=' in variable name \"%s\"\n", name);
176 * search if variable with this name already exists
179 for (env=env_data; *env; env=nxt+1) {
180 for (nxt=env; *nxt; ++nxt)
182 if ((oldval = envmatch((uchar *)name, env-env_data)) >= 0)
187 * Delete any existing definition
190 #ifndef CONFIG_ENV_OVERWRITE
193 * Ethernet Address and serial# can be set only once,
196 if ( (strcmp (name, "serial#") == 0) ||
197 ((strcmp (name, "ethaddr") == 0)
198 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
199 && (strcmp ((char *)env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
200 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
202 printf ("Can't overwrite \"%s\"\n", name);
207 /* Check for console redirection */
208 if (strcmp(name,"stdin") == 0) {
210 } else if (strcmp(name,"stdout") == 0) {
212 } else if (strcmp(name,"stderr") == 0) {
217 if (argc < 3) { /* Cannot delete it! */
218 printf("Can't delete \"%s\"\n", name);
222 /* Try assigning specified device */
223 if (console_assign (console, argv[2]) < 0)
226 #ifdef CONFIG_SERIAL_MULTI
227 if (serial_assign (argv[2]) < 0)
233 * Switch to new baudrate if new baudrate is supported
235 if (strcmp(argv[1],"baudrate") == 0) {
236 int baudrate = simple_strtoul(argv[2], NULL, 10);
238 for (i=0; i<N_BAUDRATES; ++i) {
239 if (baudrate == baudrate_table[i])
242 if (i == N_BAUDRATES) {
243 printf ("## Baudrate %d bps not supported\n",
247 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
250 gd->baudrate = baudrate;
251 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
252 gd->bd->bi_baudrate = baudrate;
263 if (*++nxt == '\0') {
264 if (env > env_data) {
272 if ((*env == '\0') && (*nxt == '\0'))
280 #ifdef CONFIG_NET_MULTI
281 if (strncmp(name, "eth", 3) == 0) {
283 int num = simple_strtoul(name+3, &end, 10);
285 if (strcmp(end, "addr") == 0) {
286 eth_set_enetaddr(num, argv[2]);
293 if ((argc < 3) || argv[2] == NULL) {
299 * Append new definition at the end
301 for (env=env_data; *env || *(env+1); ++env)
307 * "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
309 len = strlen(name) + 2;
310 /* add '=' for first arg, ' ' for all others */
311 for (i=2; i<argc; ++i) {
312 len += strlen(argv[i]) + 1;
314 if (len > (&env_data[ENV_SIZE]-env)) {
315 printf ("## Error: environment overflow, \"%s\" deleted\n", name);
318 while ((*env = *name++) != '\0')
320 for (i=2; i<argc; ++i) {
323 *env = (i==2) ? '=' : ' ';
324 while ((*++env = *val++) != '\0')
328 /* end is marked with double '\0' */
335 * Some variables should be updated when the corresponding
336 * entry in the enviornment is changed
339 if (strcmp(argv[1],"ethaddr") == 0) {
340 char *s = argv[2]; /* always use only one arg */
342 for (i=0; i<6; ++i) {
343 bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
344 if (s) s = (*e) ? e+1 : e;
346 #ifdef CONFIG_NET_MULTI
347 eth_set_enetaddr(0, argv[2]);
352 if (strcmp(argv[1],"ipaddr") == 0) {
353 char *s = argv[2]; /* always use only one arg */
357 for (addr=0, i=0; i<4; ++i) {
358 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
360 addr |= (val & 0xFF);
361 if (s) s = (*e) ? e+1 : e;
363 bd->bi_ip_addr = htonl(addr);
366 if (strcmp(argv[1],"loadaddr") == 0) {
367 load_addr = simple_strtoul(argv[2], NULL, 16);
370 #if (CONFIG_COMMANDS & CFG_CMD_NET)
371 if (strcmp(argv[1],"bootfile") == 0) {
372 copy_filename (BootFile, argv[2], sizeof(BootFile));
375 #endif /* CFG_CMD_NET */
377 #ifdef CONFIG_AMIGAONEG3SE
378 if (strcmp(argv[1], "vga_fg_color") == 0 ||
379 strcmp(argv[1], "vga_bg_color") == 0 ) {
380 extern void video_set_color(unsigned char attr);
381 extern unsigned char video_get_attr(void);
383 video_set_color(video_get_attr());
386 #endif /* CONFIG_AMIGAONEG3SE */
391 void setenv (char *varname, char *varvalue)
393 char *argv[4] = { "setenv", varname, varvalue, NULL };
394 if (varvalue == NULL)
395 _do_setenv (0, 2, argv);
397 _do_setenv (0, 3, argv);
400 int do_setenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
403 printf ("Usage:\n%s\n", cmdtp->usage);
407 return _do_setenv (flag, argc, argv);
410 /************************************************************************
411 * Prompt for environment variable
414 #if (CONFIG_COMMANDS & CFG_CMD_ASKENV)
415 int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
417 extern char console_buffer[CFG_CBSIZE];
418 char message[CFG_CBSIZE];
419 int size = CFG_CBSIZE - 1;
423 local_args[0] = argv[0];
424 local_args[1] = argv[1];
425 local_args[2] = NULL;
426 local_args[3] = NULL;
429 printf ("Usage:\n%s\n", cmdtp->usage);
432 /* Check the syntax */
435 printf ("Usage:\n%s\n", cmdtp->usage);
438 case 2: /* askenv envname */
439 sprintf (message, "Please enter '%s':", argv[1]);
442 case 3: /* askenv envname size */
443 sprintf (message, "Please enter '%s':", argv[1]);
444 size = simple_strtoul (argv[2], NULL, 10);
447 default: /* askenv envname message1 ... messagen size */
452 for (i = 2; i < argc - 1; i++) {
454 message[pos++] = ' ';
456 strcpy (message+pos, argv[i]);
457 pos += strlen(argv[i]);
460 size = simple_strtoul (argv[argc - 1], NULL, 10);
465 if (size >= CFG_CBSIZE)
466 size = CFG_CBSIZE - 1;
471 /* prompt for input */
472 len = readline (message);
475 console_buffer[size] = '\0';
478 if (console_buffer[0] != '\0') {
479 local_args[2] = console_buffer;
483 /* Continue calling setenv code */
484 return _do_setenv (flag, len, local_args);
486 #endif /* CFG_CMD_ASKENV */
488 /************************************************************************
489 * Look up variable from environment,
490 * return address of storage for that variable,
491 * or NULL if not found
494 char *getenv (char *name)
500 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
503 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
504 if (nxt >= CFG_ENV_SIZE) {
508 if ((val=envmatch((uchar *)name, i)) < 0)
510 return ((char *)env_get_addr(val));
516 int getenv_r (char *name, char *buf, unsigned len)
520 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
523 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
524 if (nxt >= CFG_ENV_SIZE) {
528 if ((val=envmatch((uchar *)name, i)) < 0)
530 /* found; copy out */
532 while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
541 #if defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) || \
542 ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_FLASH)) == \
543 (CFG_CMD_ENV|CFG_CMD_FLASH)) || \
544 ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_NAND)) == \
545 (CFG_CMD_ENV|CFG_CMD_NAND))
546 int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
548 extern char * env_name_spec;
550 printf ("Saving Environment to %s...\n", env_name_spec);
552 return (saveenv() ? 1 : 0);
559 /************************************************************************
560 * Match a name / name=value pair
562 * s1 is either a simple 'name', or a 'name=value' pair.
563 * i2 is the environment index for a 'name2=value2' pair.
564 * If the names match, return the index for the value2, else NULL.
568 envmatch (uchar *s1, int i2)
571 while (*s1 == env_get_char(i2++))
574 if (*s1 == '\0' && env_get_char(i2-1) == '=')
580 /**************************************************/
583 printenv, CFG_MAXARGS, 1, do_printenv,
584 "printenv- print environment variables\n",
585 "\n - print values of all environment variables\n"
586 "printenv name ...\n"
587 " - print value of environment variable 'name'\n"
591 setenv, CFG_MAXARGS, 0, do_setenv,
592 "setenv - set environment variables\n",
594 " - set environment variable 'name' to 'value ...'\n"
596 " - delete environment variable 'name'\n"
599 #if defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) || \
600 ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_FLASH)) == \
601 (CFG_CMD_ENV|CFG_CMD_FLASH)) || \
602 ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_NAND)) == \
603 (CFG_CMD_ENV|CFG_CMD_NAND))
605 saveenv, 1, 0, do_saveenv,
606 "saveenv - save environment variables to persistent storage\n",
610 #endif /* CFG_CMD_ENV */
612 #if (CONFIG_COMMANDS & CFG_CMD_ASKENV)
615 askenv, CFG_MAXARGS, 1, do_askenv,
616 "askenv - get environment variables from stdin\n",
617 "name [message] [size]\n"
618 " - get environment variable 'name' from stdin (max 'size' chars)\n"
620 " - get environment variable 'name' from stdin\n"
622 " - get environment variable 'name' from stdin (max 'size' chars)\n"
623 "askenv name [message] size\n"
624 " - display 'message' string and get environment variable 'name'"
625 "from stdin (max 'size' chars)\n"
627 #endif /* CFG_CMD_ASKENV */
629 #if (CONFIG_COMMANDS & CFG_CMD_RUN)
630 int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
632 run, CFG_MAXARGS, 1, do_run,
633 "run - run commands in an environment variable\n",
635 " - run the commands in the environment variable(s) 'var'\n"
637 #endif /* CFG_CMD_RUN */