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
97 int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
102 if (argc == 1) { /* Print all env variables */
103 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
104 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
106 for (k=i; k<nxt; ++k)
107 putc(env_get_char(k));
111 puts ("\n ** Abort\n");
116 printf("\nEnvironment size: %d/%ld bytes\n",
122 for (i=1; i<argc; ++i) { /* print single env variables */
123 char *name = argv[i];
127 for (j=0; env_get_char(j) != '\0'; j=nxt+1) {
129 for (nxt=j; env_get_char(nxt) != '\0'; ++nxt)
131 k = envmatch((uchar *)name, j);
138 putc(env_get_char(k++));
143 printf ("## Error: \"%s\" not defined\n", name);
150 /************************************************************************
151 * Set a new environment variable,
152 * or replace or delete an existing one.
154 * This function will ONLY work with a in-RAM copy of the environment
157 int _do_setenv (int flag, int argc, char *argv[])
161 uchar *env, *nxt = NULL;
165 uchar *env_data = env_get_addr(0);
167 if (!env_data) /* need copy in RAM */
172 if (strchr(name, '=')) {
173 printf ("## Error: illegal character '=' in variable name \"%s\"\n", name);
179 * search if variable with this name already exists
182 for (env=env_data; *env; env=nxt+1) {
183 for (nxt=env; *nxt; ++nxt)
185 if ((oldval = envmatch((uchar *)name, env-env_data)) >= 0)
190 * Delete any existing definition
193 #ifndef CONFIG_ENV_OVERWRITE
196 * Ethernet Address and serial# can be set only once,
200 #ifdef CONFIG_HAS_UID
201 /* Allow serial# forced overwrite with 0xdeaf4add flag */
202 ((strcmp (name, "serial#") == 0) && (flag != 0xdeaf4add)) ||
204 (strcmp (name, "serial#") == 0) ||
206 ((strcmp (name, "ethaddr") == 0)
207 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
208 && (strcmp ((char *)env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
209 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
211 printf ("Can't overwrite \"%s\"\n", name);
216 /* Check for console redirection */
217 if (strcmp(name,"stdin") == 0) {
219 } else if (strcmp(name,"stdout") == 0) {
221 } else if (strcmp(name,"stderr") == 0) {
226 if (argc < 3) { /* Cannot delete it! */
227 printf("Can't delete \"%s\"\n", name);
231 #ifdef CONFIG_CONSOLE_MUX
232 i = iomux_doenv(console, argv[2]);
236 /* Try assigning specified device */
237 if (console_assign (console, argv[2]) < 0)
240 #ifdef CONFIG_SERIAL_MULTI
241 if (serial_assign (argv[2]) < 0)
244 #endif /* CONFIG_CONSOLE_MUX */
248 * Switch to new baudrate if new baudrate is supported
250 if (strcmp(argv[1],"baudrate") == 0) {
251 int baudrate = simple_strtoul(argv[2], NULL, 10);
253 for (i=0; i<N_BAUDRATES; ++i) {
254 if (baudrate == baudrate_table[i])
257 if (i == N_BAUDRATES) {
258 printf ("## Baudrate %d bps not supported\n",
262 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
265 gd->baudrate = baudrate;
266 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
267 gd->bd->bi_baudrate = baudrate;
278 if (*++nxt == '\0') {
279 if (env > env_data) {
287 if ((*env == '\0') && (*nxt == '\0'))
296 if ((argc < 3) || argv[2] == NULL) {
302 * Append new definition at the end
304 for (env=env_data; *env || *(env+1); ++env)
310 * "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
312 len = strlen(name) + 2;
313 /* add '=' for first arg, ' ' for all others */
314 for (i=2; i<argc; ++i) {
315 len += strlen(argv[i]) + 1;
317 if (len > (&env_data[ENV_SIZE]-env)) {
318 printf ("## Error: environment overflow, \"%s\" deleted\n", name);
321 while ((*env = *name++) != '\0')
323 for (i=2; i<argc; ++i) {
326 *env = (i==2) ? '=' : ' ';
327 while ((*++env = *val++) != '\0')
331 /* end is marked with double '\0' */
338 * Some variables should be updated when the corresponding
339 * entry in the enviornment is changed
342 if (strcmp(argv[1],"ethaddr") == 0)
345 if (strcmp(argv[1],"ipaddr") == 0) {
346 char *s = argv[2]; /* always use only one arg */
350 for (addr=0, i=0; i<4; ++i) {
351 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
353 addr |= (val & 0xFF);
354 if (s) s = (*e) ? e+1 : e;
356 bd->bi_ip_addr = htonl(addr);
359 if (strcmp(argv[1],"loadaddr") == 0) {
360 load_addr = simple_strtoul(argv[2], NULL, 16);
363 #if defined(CONFIG_CMD_NET)
364 if (strcmp(argv[1],"bootfile") == 0) {
365 copy_filename (BootFile, argv[2], sizeof(BootFile));
370 #ifdef CONFIG_AMIGAONEG3SE
371 if (strcmp(argv[1], "vga_fg_color") == 0 ||
372 strcmp(argv[1], "vga_bg_color") == 0 ) {
373 extern void video_set_color(unsigned char attr);
374 extern unsigned char video_get_attr(void);
376 video_set_color(video_get_attr());
379 #endif /* CONFIG_AMIGAONEG3SE */
384 int setenv (char *varname, char *varvalue)
386 char *argv[4] = { "setenv", varname, varvalue, NULL };
387 if (varvalue == NULL)
388 return _do_setenv (0, 2, argv);
390 return _do_setenv (0, 3, argv);
393 #ifdef CONFIG_HAS_UID
394 void forceenv (char *varname, char *varvalue)
396 char *argv[4] = { "forceenv", varname, varvalue, NULL };
397 _do_setenv (0xdeaf4add, 3, argv);
401 int do_setenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
408 return _do_setenv (flag, argc, argv);
411 /************************************************************************
412 * Prompt for environment variable
415 #if defined(CONFIG_CMD_ASKENV)
416 int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
418 extern char console_buffer[CONFIG_SYS_CBSIZE];
419 char message[CONFIG_SYS_CBSIZE];
420 int size = CONFIG_SYS_CBSIZE - 1;
424 local_args[0] = argv[0];
425 local_args[1] = argv[1];
426 local_args[2] = NULL;
427 local_args[3] = NULL;
433 /* Check the syntax */
439 case 2: /* askenv envname */
440 sprintf (message, "Please enter '%s':", argv[1]);
443 case 3: /* askenv envname size */
444 sprintf (message, "Please enter '%s':", argv[1]);
445 size = simple_strtoul (argv[2], NULL, 10);
448 default: /* askenv envname message1 ... messagen size */
453 for (i = 2; i < argc - 1; i++) {
455 message[pos++] = ' ';
457 strcpy (message+pos, argv[i]);
458 pos += strlen(argv[i]);
461 size = simple_strtoul (argv[argc - 1], NULL, 10);
466 if (size >= CONFIG_SYS_CBSIZE)
467 size = CONFIG_SYS_CBSIZE - 1;
472 /* prompt for input */
473 len = readline (message);
476 console_buffer[size] = '\0';
479 if (console_buffer[0] != '\0') {
480 local_args[2] = console_buffer;
484 /* Continue calling setenv code */
485 return _do_setenv (flag, len, local_args);
489 /************************************************************************
490 * Look up variable from environment,
491 * return address of storage for that variable,
492 * or NULL if not found
495 char *getenv (char *name)
501 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
504 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
505 if (nxt >= CONFIG_ENV_SIZE) {
509 if ((val=envmatch((uchar *)name, i)) < 0)
511 return ((char *)env_get_addr(val));
517 int getenv_r (char *name, char *buf, unsigned len)
521 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
524 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
525 if (nxt >= CONFIG_ENV_SIZE) {
529 if ((val=envmatch((uchar *)name, i)) < 0)
531 /* found; copy out */
533 while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
542 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
544 int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
546 extern char * env_name_spec;
548 printf ("Saving Environment to %s...\n", env_name_spec);
550 return (saveenv() ? 1 : 0);
554 saveenv, 1, 0, do_saveenv,
555 "save environment variables to persistent storage",
562 /************************************************************************
563 * Match a name / name=value pair
565 * s1 is either a simple 'name', or a 'name=value' pair.
566 * i2 is the environment index for a 'name2=value2' pair.
567 * If the names match, return the index for the value2, else NULL.
570 int envmatch (uchar *s1, int i2)
573 while (*s1 == env_get_char(i2++))
576 if (*s1 == '\0' && env_get_char(i2-1) == '=')
582 /**************************************************/
585 printenv, CONFIG_SYS_MAXARGS, 1, do_printenv,
586 "print environment variables",
587 "\n - print values of all environment variables\n"
588 "printenv name ...\n"
589 " - print value of environment variable 'name'\n"
593 setenv, CONFIG_SYS_MAXARGS, 0, do_setenv,
594 "set environment variables",
596 " - set environment variable 'name' to 'value ...'\n"
598 " - delete environment variable 'name'\n"
601 #if defined(CONFIG_CMD_ASKENV)
604 askenv, CONFIG_SYS_MAXARGS, 1, do_askenv,
605 "get environment variables from stdin",
606 "name [message] [size]\n"
607 " - get environment variable 'name' from stdin (max 'size' chars)\n"
609 " - get environment variable 'name' from stdin\n"
611 " - get environment variable 'name' from stdin (max 'size' chars)\n"
612 "askenv name [message] size\n"
613 " - display 'message' string and get environment variable 'name'"
614 "from stdin (max 'size' chars)\n"
618 #if defined(CONFIG_CMD_RUN)
619 int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
621 run, CONFIG_SYS_MAXARGS, 1, do_run,
622 "run commands in an environment variable",
624 " - run the commands in the environment variable(s) 'var'\n"