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_NVRAM) && \
56 !defined(CONFIG_ENV_IS_IN_EEPROM) && \
57 !defined(CONFIG_ENV_IS_IN_FLASH) && \
58 !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
59 !defined(CONFIG_ENV_IS_IN_NAND) && \
60 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
61 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
62 !defined(CONFIG_ENV_IS_NOWHERE)
63 # error Define one of CONFIG_ENV_IS_IN_{NVRAM|EEPROM|FLASH|DATAFLASH|ONENAND|SPI_FLASH|NOWHERE}
67 #define MK_STR(x) XMK_STR(x)
69 /************************************************************************
70 ************************************************************************/
73 * Table with supported baudrates (defined in config_xyz.h)
75 static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
76 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
79 /************************************************************************
80 * Command interface: print one or all environment variables
83 int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
88 if (argc == 1) { /* Print all env variables */
89 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
90 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
93 putc(env_get_char(k));
97 puts ("\n ** Abort\n");
102 printf("\nEnvironment size: %d/%ld bytes\n",
108 for (i=1; i<argc; ++i) { /* print single env variables */
109 char *name = argv[i];
113 for (j=0; env_get_char(j) != '\0'; j=nxt+1) {
115 for (nxt=j; env_get_char(nxt) != '\0'; ++nxt)
117 k = envmatch((uchar *)name, j);
124 putc(env_get_char(k++));
129 printf ("## Error: \"%s\" not defined\n", name);
136 /************************************************************************
137 * Set a new environment variable,
138 * or replace or delete an existing one.
140 * This function will ONLY work with a in-RAM copy of the environment
143 int _do_setenv (int flag, int argc, char *argv[])
147 uchar *env, *nxt = NULL;
151 uchar *env_data = env_get_addr(0);
153 if (!env_data) /* need copy in RAM */
158 if (strchr(name, '=')) {
159 printf ("## Error: illegal character '=' in variable name \"%s\"\n", name);
164 * search if variable with this name already exists
167 for (env=env_data; *env; env=nxt+1) {
168 for (nxt=env; *nxt; ++nxt)
170 if ((oldval = envmatch((uchar *)name, env-env_data)) >= 0)
175 * Delete any existing definition
178 #ifndef CONFIG_ENV_OVERWRITE
181 * Ethernet Address and serial# can be set only once,
185 #ifdef CONFIG_HAS_UID
186 /* Allow serial# forced overwrite with 0xdeaf4add flag */
187 ((strcmp (name, "serial#") == 0) && (flag != 0xdeaf4add)) ||
189 (strcmp (name, "serial#") == 0) ||
191 ((strcmp (name, "ethaddr") == 0)
192 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
193 && (strcmp ((char *)env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
194 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
196 printf ("Can't overwrite \"%s\"\n", name);
201 /* Check for console redirection */
202 if (strcmp(name,"stdin") == 0) {
204 } else if (strcmp(name,"stdout") == 0) {
206 } else if (strcmp(name,"stderr") == 0) {
211 if (argc < 3) { /* Cannot delete it! */
212 printf("Can't delete \"%s\"\n", name);
216 #ifdef CONFIG_CONSOLE_MUX
217 i = iomux_doenv(console, argv[2]);
221 /* Try assigning specified device */
222 if (console_assign (console, argv[2]) < 0)
225 #ifdef CONFIG_SERIAL_MULTI
226 if (serial_assign (argv[2]) < 0)
229 #endif /* CONFIG_CONSOLE_MUX */
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 defined(CONFIG_CMD_NET)
371 if (strcmp(argv[1],"bootfile") == 0) {
372 copy_filename (BootFile, argv[2], sizeof(BootFile));
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 int setenv (char *varname, char *varvalue)
393 char *argv[4] = { "setenv", varname, varvalue, NULL };
394 if (varvalue == NULL)
395 return _do_setenv (0, 2, argv);
397 return _do_setenv (0, 3, argv);
400 #ifdef CONFIG_HAS_UID
401 void forceenv (char *varname, char *varvalue)
403 char *argv[4] = { "forceenv", varname, varvalue, NULL };
404 _do_setenv (0xdeaf4add, 3, argv);
408 int do_setenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
415 return _do_setenv (flag, argc, argv);
418 /************************************************************************
419 * Prompt for environment variable
422 #if defined(CONFIG_CMD_ASKENV)
423 int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
425 extern char console_buffer[CONFIG_SYS_CBSIZE];
426 char message[CONFIG_SYS_CBSIZE];
427 int size = CONFIG_SYS_CBSIZE - 1;
431 local_args[0] = argv[0];
432 local_args[1] = argv[1];
433 local_args[2] = NULL;
434 local_args[3] = NULL;
440 /* Check the syntax */
446 case 2: /* askenv envname */
447 sprintf (message, "Please enter '%s':", argv[1]);
450 case 3: /* askenv envname size */
451 sprintf (message, "Please enter '%s':", argv[1]);
452 size = simple_strtoul (argv[2], NULL, 10);
455 default: /* askenv envname message1 ... messagen size */
460 for (i = 2; i < argc - 1; i++) {
462 message[pos++] = ' ';
464 strcpy (message+pos, argv[i]);
465 pos += strlen(argv[i]);
468 size = simple_strtoul (argv[argc - 1], NULL, 10);
473 if (size >= CONFIG_SYS_CBSIZE)
474 size = CONFIG_SYS_CBSIZE - 1;
479 /* prompt for input */
480 len = readline (message);
483 console_buffer[size] = '\0';
486 if (console_buffer[0] != '\0') {
487 local_args[2] = console_buffer;
491 /* Continue calling setenv code */
492 return _do_setenv (flag, len, local_args);
496 /************************************************************************
497 * Look up variable from environment,
498 * return address of storage for that variable,
499 * or NULL if not found
502 char *getenv (char *name)
508 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
511 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
512 if (nxt >= CONFIG_ENV_SIZE) {
516 if ((val=envmatch((uchar *)name, i)) < 0)
518 return ((char *)env_get_addr(val));
524 int getenv_r (char *name, char *buf, unsigned len)
528 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
531 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
532 if (nxt >= CONFIG_ENV_SIZE) {
536 if ((val=envmatch((uchar *)name, i)) < 0)
538 /* found; copy out */
540 while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
549 #if defined(CONFIG_CMD_ENV) && !defined(CONFIG_ENV_IS_NOWHERE)
551 int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
553 extern char * env_name_spec;
555 printf ("Saving Environment to %s...\n", env_name_spec);
557 return (saveenv() ? 1 : 0);
561 saveenv, 1, 0, do_saveenv,
562 "save environment variables to persistent storage",
569 /************************************************************************
570 * Match a name / name=value pair
572 * s1 is either a simple 'name', or a 'name=value' pair.
573 * i2 is the environment index for a 'name2=value2' pair.
574 * If the names match, return the index for the value2, else NULL.
577 int envmatch (uchar *s1, int i2)
580 while (*s1 == env_get_char(i2++))
583 if (*s1 == '\0' && env_get_char(i2-1) == '=')
589 /**************************************************/
592 printenv, CONFIG_SYS_MAXARGS, 1, do_printenv,
593 "print environment variables",
594 "\n - print values of all environment variables\n"
595 "printenv name ...\n"
596 " - print value of environment variable 'name'\n"
600 setenv, CONFIG_SYS_MAXARGS, 0, do_setenv,
601 "set environment variables",
603 " - set environment variable 'name' to 'value ...'\n"
605 " - delete environment variable 'name'\n"
608 #if defined(CONFIG_CMD_ASKENV)
611 askenv, CONFIG_SYS_MAXARGS, 1, do_askenv,
612 "get environment variables from stdin",
613 "name [message] [size]\n"
614 " - get environment variable 'name' from stdin (max 'size' chars)\n"
616 " - get environment variable 'name' from stdin\n"
618 " - get environment variable 'name' from stdin (max 'size' chars)\n"
619 "askenv name [message] size\n"
620 " - display 'message' string and get environment variable 'name'"
621 "from stdin (max 'size' chars)\n"
625 #if defined(CONFIG_CMD_RUN)
626 int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
628 run, CONFIG_SYS_MAXARGS, 1, do_run,
629 "run commands in an environment variable",
631 " - run the commands in the environment variable(s) 'var'\n"