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>
46 #include <linux/stddef.h>
47 #include <asm/byteorder.h>
48 #if (CONFIG_COMMANDS & CFG_CMD_NET)
52 #if !defined(CFG_ENV_IS_IN_NVRAM) && \
53 !defined(CFG_ENV_IS_IN_EEPROM) && \
54 !defined(CFG_ENV_IS_IN_FLASH) && \
55 !defined(CFG_ENV_IS_IN_DATAFLASH) && \
56 !defined(CFG_ENV_IS_NOWHERE)
57 # error Define one of CFG_ENV_IS_IN_{NVRAM|EEPROM|FLASH|DATAFLASH|NOWHERE}
61 #define MK_STR(x) XMK_STR(x)
63 /************************************************************************
64 ************************************************************************/
66 /* Function that returns a character from the environment */
67 extern uchar (*env_get_char)(int);
69 /* Function that returns a pointer to a value from the environment */
70 /* (Only memory version supported / needed). */
71 extern uchar *env_get_addr(int);
73 /* Function that updates CRC of the enironment */
74 extern void env_crc_update (void);
76 /************************************************************************
77 ************************************************************************/
79 static int envmatch (uchar *, int);
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(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[])
153 DECLARE_GLOBAL_DATA_PTR;
157 uchar *env, *nxt = NULL;
161 uchar *env_data = env_get_addr(0);
163 if (!env_data) /* need copy in RAM */
169 * search if variable with this name already exists
172 for (env=env_data; *env; env=nxt+1) {
173 for (nxt=env; *nxt; ++nxt)
175 if ((oldval = envmatch(name, env-env_data)) >= 0)
180 * Delete any existing definition
183 #ifndef CONFIG_ENV_OVERWRITE
186 * Ethernet Address and serial# can be set only once,
189 if ( (strcmp (name, "serial#") == 0) ||
190 ((strcmp (name, "ethaddr") == 0)
191 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
192 && (strcmp (env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
193 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
195 printf ("Can't overwrite \"%s\"\n", name);
200 /* Check for console redirection */
201 if (strcmp(name,"stdin") == 0) {
203 } else if (strcmp(name,"stdout") == 0) {
205 } else if (strcmp(name,"stderr") == 0) {
210 if (argc < 3) { /* Cannot delete it! */
211 printf("Can't delete \"%s\"\n", name);
215 /* Try assigning specified device */
216 if (console_assign (console, argv[2]) < 0)
221 * Switch to new baudrate if new baudrate is supported
223 if (strcmp(argv[1],"baudrate") == 0) {
224 int baudrate = simple_strtoul(argv[2], NULL, 10);
226 for (i=0; i<N_BAUDRATES; ++i) {
227 if (baudrate == baudrate_table[i])
230 if (i == N_BAUDRATES) {
231 printf ("## Baudrate %d bps not supported\n",
235 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
238 gd->baudrate = baudrate;
240 gd->bd->bi_baudrate = baudrate;
251 if (*++nxt == '\0') {
252 if (env > env_data) {
260 if ((*env == '\0') && (*nxt == '\0'))
268 #ifdef CONFIG_NET_MULTI
269 if (strncmp(name, "eth", 3) == 0) {
271 int num = simple_strtoul(name+3, &end, 10);
273 if (strcmp(end, "addr") == 0) {
274 eth_set_enetaddr(num, argv[2]);
281 if ((argc < 3) || argv[2] == NULL) {
287 * Append new definition at the end
289 for (env=env_data; *env || *(env+1); ++env)
295 * "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
297 len = strlen(name) + 2;
298 /* add '=' for first arg, ' ' for all others */
299 for (i=2; i<argc; ++i) {
300 len += strlen(argv[i]) + 1;
302 if (len > (&env_data[ENV_SIZE]-env)) {
303 printf ("## Error: environment overflow, \"%s\" deleted\n", name);
306 while ((*env = *name++) != '\0')
308 for (i=2; i<argc; ++i) {
311 *env = (i==2) ? '=' : ' ';
312 while ((*++env = *val++) != '\0')
316 /* end is marked with double '\0' */
323 * Some variables should be updated when the corresponding
324 * entry in the enviornment is changed
327 if (strcmp(argv[1],"ethaddr") == 0) {
328 char *s = argv[2]; /* always use only one arg */
330 for (i=0; i<6; ++i) {
331 bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
332 if (s) s = (*e) ? e+1 : e;
334 #ifdef CONFIG_NET_MULTI
335 eth_set_enetaddr(0, argv[2]);
340 if (strcmp(argv[1],"ipaddr") == 0) {
341 char *s = argv[2]; /* always use only one arg */
345 for (addr=0, i=0; i<4; ++i) {
346 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
348 addr |= (val & 0xFF);
349 if (s) s = (*e) ? e+1 : e;
351 bd->bi_ip_addr = htonl(addr);
354 if (strcmp(argv[1],"loadaddr") == 0) {
355 load_addr = simple_strtoul(argv[2], NULL, 16);
358 #if (CONFIG_COMMANDS & CFG_CMD_NET)
359 if (strcmp(argv[1],"bootfile") == 0) {
360 copy_filename (BootFile, argv[2], sizeof(BootFile));
363 #endif /* CFG_CMD_NET */
365 #ifdef CONFIG_AMIGAONEG3SE
366 if (strcmp(argv[1], "vga_fg_color") == 0 ||
367 strcmp(argv[1], "vga_bg_color") == 0 ) {
368 extern void video_set_color(unsigned char attr);
369 extern unsigned char video_get_attr(void);
371 video_set_color(video_get_attr());
374 #endif /* CONFIG_AMIGAONEG3SE */
379 void setenv (char *varname, char *varvalue)
381 char *argv[4] = { "setenv", varname, varvalue, NULL };
382 _do_setenv (0, 3, argv);
385 int do_setenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
388 printf ("Usage:\n%s\n", cmdtp->usage);
392 return _do_setenv (flag, argc, argv);
395 /************************************************************************
396 * Prompt for environment variable
399 #if (CONFIG_COMMANDS & CFG_CMD_ASKENV)
400 int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
402 extern char console_buffer[CFG_CBSIZE];
403 char message[CFG_CBSIZE];
404 int size = CFG_CBSIZE - 1;
408 local_args[0] = argv[0];
409 local_args[1] = argv[1];
410 local_args[2] = NULL;
411 local_args[3] = NULL;
414 printf ("Usage:\n%s\n", cmdtp->usage);
417 /* Check the syntax */
420 printf ("Usage:\n%s\n", cmdtp->usage);
423 case 2: /* askenv envname */
424 sprintf (message, "Please enter '%s':", argv[1]);
427 case 3: /* askenv envname size */
428 sprintf (message, "Please enter '%s':", argv[1]);
429 size = simple_strtoul (argv[2], NULL, 10);
432 default: /* askenv envname message1 ... messagen size */
437 for (i = 2; i < argc - 1; i++) {
439 message[pos++] = ' ';
441 strcpy (message+pos, argv[i]);
442 pos += strlen(argv[i]);
445 size = simple_strtoul (argv[argc - 1], NULL, 10);
450 if (size >= CFG_CBSIZE)
451 size = CFG_CBSIZE - 1;
456 /* prompt for input */
457 len = readline (message);
460 console_buffer[size] = '\0';
463 if (console_buffer[0] != '\0') {
464 local_args[2] = console_buffer;
468 /* Continue calling setenv code */
469 return _do_setenv (flag, len, local_args);
471 #endif /* CFG_CMD_ASKENV */
473 /************************************************************************
474 * Look up variable from environment,
475 * return address of storage for that variable,
476 * or NULL if not found
479 char *getenv (uchar *name)
485 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
488 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
489 if (nxt >= CFG_ENV_SIZE) {
493 if ((val=envmatch(name, i)) < 0)
495 return (env_get_addr(val));
501 int getenv_r (uchar *name, uchar *buf, unsigned len)
505 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
508 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
509 if (nxt >= CFG_ENV_SIZE) {
513 if ((val=envmatch(name, i)) < 0)
515 /* found; copy out */
517 while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
526 #if defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) || \
527 ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_FLASH)) == \
528 (CFG_CMD_ENV|CFG_CMD_FLASH))
529 int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
531 extern char * env_name_spec;
533 printf ("Saving Environment to %s...\n", env_name_spec);
535 return (saveenv() ? 1 : 0);
542 /************************************************************************
543 * Match a name / name=value pair
545 * s1 is either a simple 'name', or a 'name=value' pair.
546 * i2 is the environment index for a 'name2=value2' pair.
547 * If the names match, return the index for the value2, else NULL.
551 envmatch (uchar *s1, int i2)
554 while (*s1 == env_get_char(i2++))
557 if (*s1 == '\0' && env_get_char(i2-1) == '=')
563 /**************************************************/
566 printenv, CFG_MAXARGS, 1, do_printenv,
567 "printenv- print environment variables\n",
568 "\n - print values of all environment variables\n"
569 "printenv name ...\n"
570 " - print value of environment variable 'name'\n"
574 setenv, CFG_MAXARGS, 0, do_setenv,
575 "setenv - set environment variables\n",
577 " - set environment variable 'name' to 'value ...'\n"
579 " - delete environment variable 'name'\n"
582 #if ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_FLASH)) == (CFG_CMD_ENV|CFG_CMD_FLASH))
585 saveenv, 1, 0, do_saveenv,
586 "saveenv - save environment variables to persistent storage\n",
590 #endif /* CFG_CMD_ENV */
592 #if (CONFIG_COMMANDS & CFG_CMD_ASKENV)
595 askenv, CFG_MAXARGS, 1, do_askenv,
596 "askenv - get environment variables from stdin\n",
597 "name [message] [size]\n"
598 " - get environment variable 'name' from stdin (max 'size' chars)\n"
600 " - get environment variable 'name' from stdin\n"
602 " - get environment variable 'name' from stdin (max 'size' chars)\n"
603 "askenv name [message] size\n"
604 " - display 'message' string and get environment variable 'name'"
605 "from stdin (max 'size' chars)\n"
607 #endif /* CFG_CMD_ASKENV */
609 #if (CONFIG_COMMANDS & CFG_CMD_RUN)
610 int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
612 run, CFG_MAXARGS, 1, do_run,
613 "run - run commands in an environment variable\n",
615 " - run the commands in the environment variable(s) 'var'\n"
617 #endif /* CFG_CMD_RUN */