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 character from the environment */
72 extern uchar (*env_get_char)(int);
74 /* Function that returns a pointer to a value from the environment */
75 /* (Only memory version supported / needed). */
76 extern uchar *env_get_addr(int);
78 /* Function that updates CRC of the enironment */
79 extern void env_crc_update (void);
81 /************************************************************************
82 ************************************************************************/
84 static int envmatch (uchar *, int);
87 * Table with supported baudrates (defined in config_xyz.h)
89 static const unsigned long baudrate_table[] = CFG_BAUDRATE_TABLE;
90 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
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/%d bytes\n", i, ENV_SIZE);
121 for (i=1; i<argc; ++i) { /* print single env variables */
122 char *name = argv[i];
126 for (j=0; env_get_char(j) != '\0'; j=nxt+1) {
128 for (nxt=j; env_get_char(nxt) != '\0'; ++nxt)
130 k = envmatch((uchar *)name, j);
137 putc(env_get_char(k++));
142 printf ("## Error: \"%s\" not defined\n", name);
149 /************************************************************************
150 * Set a new environment variable,
151 * or replace or delete an existing one.
153 * This function will ONLY work with a in-RAM copy of the environment
156 int _do_setenv (int flag, int argc, char *argv[])
160 uchar *env, *nxt = NULL;
164 uchar *env_data = env_get_addr(0);
166 if (!env_data) /* need copy in RAM */
171 if (strchr(name, '=')) {
172 printf ("## Error: illegal character '=' in variable name \"%s\"\n", name);
177 * search if variable with this name already exists
180 for (env=env_data; *env; env=nxt+1) {
181 for (nxt=env; *nxt; ++nxt)
183 if ((oldval = envmatch((uchar *)name, env-env_data)) >= 0)
188 * Delete any existing definition
191 #ifndef CONFIG_ENV_OVERWRITE
194 * Ethernet Address and serial# can be set only once,
197 #ifdef CONFIG_HAS_UID
198 /* Allow serial# forced overwrite with 0xdeaf4add flag */
199 if ( ((strcmp (name, "serial#") == 0) && (flag != 0xdeaf4add)) ||
201 if ( (strcmp (name, "serial#") == 0) ||
203 ((strcmp (name, "ethaddr") == 0)
204 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
205 && (strcmp ((char *)env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
206 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
208 printf ("Can't overwrite \"%s\"\n", name);
213 /* Check for console redirection */
214 if (strcmp(name,"stdin") == 0) {
216 } else if (strcmp(name,"stdout") == 0) {
218 } else if (strcmp(name,"stderr") == 0) {
223 if (argc < 3) { /* Cannot delete it! */
224 printf("Can't delete \"%s\"\n", name);
228 /* Try assigning specified device */
229 if (console_assign (console, argv[2]) < 0)
232 #ifdef CONFIG_SERIAL_MULTI
233 if (serial_assign (argv[2]) < 0)
239 * Switch to new baudrate if new baudrate is supported
241 if (strcmp(argv[1],"baudrate") == 0) {
242 int baudrate = simple_strtoul(argv[2], NULL, 10);
244 for (i=0; i<N_BAUDRATES; ++i) {
245 if (baudrate == baudrate_table[i])
248 if (i == N_BAUDRATES) {
249 printf ("## Baudrate %d bps not supported\n",
253 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
256 gd->baudrate = baudrate;
257 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
258 gd->bd->bi_baudrate = baudrate;
269 if (*++nxt == '\0') {
270 if (env > env_data) {
278 if ((*env == '\0') && (*nxt == '\0'))
286 #ifdef CONFIG_NET_MULTI
287 if (strncmp(name, "eth", 3) == 0) {
289 int num = simple_strtoul(name+3, &end, 10);
291 if (strcmp(end, "addr") == 0) {
292 eth_set_enetaddr(num, argv[2]);
299 if ((argc < 3) || argv[2] == NULL) {
305 * Append new definition at the end
307 for (env=env_data; *env || *(env+1); ++env)
313 * "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
315 len = strlen(name) + 2;
316 /* add '=' for first arg, ' ' for all others */
317 for (i=2; i<argc; ++i) {
318 len += strlen(argv[i]) + 1;
320 if (len > (&env_data[ENV_SIZE]-env)) {
321 printf ("## Error: environment overflow, \"%s\" deleted\n", name);
324 while ((*env = *name++) != '\0')
326 for (i=2; i<argc; ++i) {
329 *env = (i==2) ? '=' : ' ';
330 while ((*++env = *val++) != '\0')
334 /* end is marked with double '\0' */
341 * Some variables should be updated when the corresponding
342 * entry in the enviornment is changed
345 if (strcmp(argv[1],"ethaddr") == 0) {
346 char *s = argv[2]; /* always use only one arg */
348 for (i=0; i<6; ++i) {
349 bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
350 if (s) s = (*e) ? e+1 : e;
352 #ifdef CONFIG_NET_MULTI
353 eth_set_enetaddr(0, argv[2]);
358 if (strcmp(argv[1],"ipaddr") == 0) {
359 char *s = argv[2]; /* always use only one arg */
363 for (addr=0, i=0; i<4; ++i) {
364 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
366 addr |= (val & 0xFF);
367 if (s) s = (*e) ? e+1 : e;
369 bd->bi_ip_addr = htonl(addr);
372 if (strcmp(argv[1],"loadaddr") == 0) {
373 load_addr = simple_strtoul(argv[2], NULL, 16);
376 #if defined(CONFIG_CMD_NET)
377 if (strcmp(argv[1],"bootfile") == 0) {
378 copy_filename (BootFile, argv[2], sizeof(BootFile));
383 #ifdef CONFIG_AMIGAONEG3SE
384 if (strcmp(argv[1], "vga_fg_color") == 0 ||
385 strcmp(argv[1], "vga_bg_color") == 0 ) {
386 extern void video_set_color(unsigned char attr);
387 extern unsigned char video_get_attr(void);
389 video_set_color(video_get_attr());
392 #endif /* CONFIG_AMIGAONEG3SE */
397 void setenv (char *varname, char *varvalue)
399 char *argv[4] = { "setenv", varname, varvalue, NULL };
400 if (varvalue == NULL)
401 _do_setenv (0, 2, argv);
403 _do_setenv (0, 3, argv);
406 #ifdef CONFIG_HAS_UID
407 void forceenv (char *varname, char *varvalue)
409 char *argv[4] = { "forceenv", varname, varvalue, NULL };
410 _do_setenv (0xdeaf4add, 3, argv);
414 int do_setenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
417 printf ("Usage:\n%s\n", cmdtp->usage);
421 return _do_setenv (flag, argc, argv);
424 /************************************************************************
425 * Prompt for environment variable
428 #if defined(CONFIG_CMD_ASKENV)
429 int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
431 extern char console_buffer[CFG_CBSIZE];
432 char message[CFG_CBSIZE];
433 int size = CFG_CBSIZE - 1;
437 local_args[0] = argv[0];
438 local_args[1] = argv[1];
439 local_args[2] = NULL;
440 local_args[3] = NULL;
443 printf ("Usage:\n%s\n", cmdtp->usage);
446 /* Check the syntax */
449 printf ("Usage:\n%s\n", cmdtp->usage);
452 case 2: /* askenv envname */
453 sprintf (message, "Please enter '%s':", argv[1]);
456 case 3: /* askenv envname size */
457 sprintf (message, "Please enter '%s':", argv[1]);
458 size = simple_strtoul (argv[2], NULL, 10);
461 default: /* askenv envname message1 ... messagen size */
466 for (i = 2; i < argc - 1; i++) {
468 message[pos++] = ' ';
470 strcpy (message+pos, argv[i]);
471 pos += strlen(argv[i]);
474 size = simple_strtoul (argv[argc - 1], NULL, 10);
479 if (size >= CFG_CBSIZE)
480 size = CFG_CBSIZE - 1;
485 /* prompt for input */
486 len = readline (message);
489 console_buffer[size] = '\0';
492 if (console_buffer[0] != '\0') {
493 local_args[2] = console_buffer;
497 /* Continue calling setenv code */
498 return _do_setenv (flag, len, local_args);
502 /************************************************************************
503 * Look up variable from environment,
504 * return address of storage for that variable,
505 * or NULL if not found
508 char *getenv (char *name)
514 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
517 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
518 if (nxt >= CFG_ENV_SIZE) {
522 if ((val=envmatch((uchar *)name, i)) < 0)
524 return ((char *)env_get_addr(val));
530 int getenv_r (char *name, char *buf, unsigned len)
534 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
537 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
538 if (nxt >= CFG_ENV_SIZE) {
542 if ((val=envmatch((uchar *)name, i)) < 0)
544 /* found; copy out */
546 while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
555 #if defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) \
556 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH)) \
557 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND)) \
558 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_ONENAND))
559 int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
561 extern char * env_name_spec;
563 printf ("Saving Environment to %s...\n", env_name_spec);
565 return (saveenv() ? 1 : 0);
571 /************************************************************************
572 * Match a name / name=value pair
574 * s1 is either a simple 'name', or a 'name=value' pair.
575 * i2 is the environment index for a 'name2=value2' pair.
576 * If the names match, return the index for the value2, else NULL.
580 envmatch (uchar *s1, int i2)
583 while (*s1 == env_get_char(i2++))
586 if (*s1 == '\0' && env_get_char(i2-1) == '=')
592 /**************************************************/
595 printenv, CFG_MAXARGS, 1, do_printenv,
596 "printenv- print environment variables\n",
597 "\n - print values of all environment variables\n"
598 "printenv name ...\n"
599 " - print value of environment variable 'name'\n"
603 setenv, CFG_MAXARGS, 0, do_setenv,
604 "setenv - set environment variables\n",
606 " - set environment variable 'name' to 'value ...'\n"
608 " - delete environment variable 'name'\n"
611 #if defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) \
612 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH)) \
613 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND)) \
614 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_ONENAND))
616 saveenv, 1, 0, do_saveenv,
617 "saveenv - save environment variables to persistent storage\n",
623 #if defined(CONFIG_CMD_ASKENV)
626 askenv, CFG_MAXARGS, 1, do_askenv,
627 "askenv - get environment variables from stdin\n",
628 "name [message] [size]\n"
629 " - get environment variable 'name' from stdin (max 'size' chars)\n"
631 " - get environment variable 'name' from stdin\n"
633 " - get environment variable 'name' from stdin (max 'size' chars)\n"
634 "askenv name [message] size\n"
635 " - display 'message' string and get environment variable 'name'"
636 "from stdin (max 'size' chars)\n"
640 #if defined(CONFIG_CMD_RUN)
641 int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
643 run, CFG_MAXARGS, 1, do_run,
644 "run - run commands in an environment variable\n",
646 " - run the commands in the environment variable(s) 'var'\n"