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 <cmd_nvedit.h>
47 #include <linux/stddef.h>
48 #include <asm/byteorder.h>
49 #if (CONFIG_COMMANDS & CFG_CMD_NET)
53 #if !defined(CFG_ENV_IS_IN_NVRAM) && !defined(CFG_ENV_IS_IN_EEPROM) && !defined(CFG_ENV_IS_IN_FLASH) && !defined(CFG_ENV_IS_NOWHERE)
54 # error Define one of CFG_ENV_IS_IN_NVRAM, CFG_ENV_IS_IN_EEPROM, CFG_ENV_IS_IN_FLASH, CFG_ENV_IS_NOWHERE
58 #define MK_STR(x) XMK_STR(x)
60 /************************************************************************
61 ************************************************************************/
63 /* Function that returns a character from the environment */
64 extern uchar (*env_get_char)(int);
66 /* Function that returns a pointer to a value from the environment */
67 /* (Only memory version supported / needed). */
68 extern uchar *env_get_addr(int);
70 /* Function that updates CRC of the enironment */
71 extern void env_crc_update (void);
73 /************************************************************************
74 ************************************************************************/
76 static int envmatch (uchar *, int);
79 * Table with supported baudrates (defined in config_xyz.h)
81 static const unsigned long baudrate_table[] = CFG_BAUDRATE_TABLE;
82 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
85 /************************************************************************
86 * Command interface: print one or all environment variables
89 int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
94 if (argc == 1) { /* Print all env variables */
95 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
96 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
99 putc(env_get_char(k));
103 puts ("\n ** Abort\n");
108 printf("\nEnvironment size: %d/%d bytes\n", i, ENV_SIZE);
113 for (i=1; i<argc; ++i) { /* print single env variables */
114 char *name = argv[i];
118 for (j=0; env_get_char(j) != '\0'; j=nxt+1) {
120 for (nxt=j; env_get_char(nxt) != '\0'; ++nxt)
122 k = envmatch(name, j);
129 putc(env_get_char(k++));
134 printf ("## Error: \"%s\" not defined\n", name);
141 /************************************************************************
142 * Set a new environment variable,
143 * or replace or delete an existing one.
145 * This function will ONLY work with a in-RAM copy of the environment
148 int _do_setenv (int flag, int argc, char *argv[])
150 DECLARE_GLOBAL_DATA_PTR;
154 uchar *env, *nxt = NULL;
158 uchar *env_data = env_get_addr(0);
160 if (!env_data) /* need copy in RAM */
166 * search if variable with this name already exists
169 for (env=env_data; *env; env=nxt+1) {
170 for (nxt=env; *nxt; ++nxt)
172 if ((oldval = envmatch(name, env-env_data)) >= 0)
177 * Delete any existing definition
180 #ifndef CONFIG_ENV_OVERWRITE
183 * Ethernet Address and serial# can be set only once
185 if ( (strcmp (name, "serial#") == 0) ||
186 ((strcmp (name, "ethaddr") == 0)
187 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
188 && (strcmp (env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
189 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
191 printf ("Can't overwrite \"%s\"\n", name);
196 /* Check for console redirection */
197 if (strcmp(name,"stdin") == 0) {
199 } else if (strcmp(name,"stdout") == 0) {
201 } else if (strcmp(name,"stderr") == 0) {
206 if (argc < 3) { /* Cannot delete it! */
207 printf("Can't delete \"%s\"\n", name);
211 /* Try assigning specified device */
212 if (console_assign (console, argv[2]) < 0)
217 * Switch to new baudrate if new baudrate is supported
219 if (strcmp(argv[1],"baudrate") == 0) {
220 int baudrate = simple_strtoul(argv[2], NULL, 10);
222 for (i=0; i<N_BAUDRATES; ++i) {
223 if (baudrate == baudrate_table[i])
226 if (i == N_BAUDRATES) {
227 printf ("## Baudrate %d bps not supported\n",
231 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
234 gd->baudrate = baudrate;
236 gd->bd->bi_baudrate = baudrate;
247 if (*++nxt == '\0') {
248 if (env > env_data) {
256 if ((*env == '\0') && (*nxt == '\0'))
264 #ifdef CONFIG_NET_MULTI
265 if (strncmp(name, "eth", 3) == 0) {
267 int num = simple_strtoul(name+3, &end, 10);
269 if (strcmp(end, "addr") == 0) {
270 eth_set_enetaddr(num, argv[2]);
277 if ((argc < 3) || argv[2] == NULL) {
283 * Append new definition at the end
285 for (env=env_data; *env || *(env+1); ++env)
291 * "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
293 len = strlen(name) + 2;
294 /* add '=' for first arg, ' ' for all others */
295 for (i=2; i<argc; ++i) {
296 len += strlen(argv[i]) + 1;
298 if (len > (&env_data[ENV_SIZE]-env)) {
299 printf ("## Error: environment overflow, \"%s\" deleted\n", name);
302 while ((*env = *name++) != '\0')
304 for (i=2; i<argc; ++i) {
307 *env = (i==2) ? '=' : ' ';
308 while ((*++env = *val++) != '\0')
312 /* end is marked with double '\0' */
319 * Some variables should be updated when the corresponding
320 * entry in the enviornment is changed
323 if (strcmp(argv[1],"ethaddr") == 0) {
324 char *s = argv[2]; /* always use only one arg */
326 for (i=0; i<6; ++i) {
327 bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
328 if (s) s = (*e) ? e+1 : e;
330 #ifdef CONFIG_NET_MULTI
331 eth_set_enetaddr(0, argv[2]);
336 if (strcmp(argv[1],"ipaddr") == 0) {
337 char *s = argv[2]; /* always use only one arg */
341 for (addr=0, i=0; i<4; ++i) {
342 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
344 addr |= (val & 0xFF);
345 if (s) s = (*e) ? e+1 : e;
347 bd->bi_ip_addr = htonl(addr);
350 if (strcmp(argv[1],"loadaddr") == 0) {
351 load_addr = simple_strtoul(argv[2], NULL, 16);
354 #if (CONFIG_COMMANDS & CFG_CMD_NET)
355 if (strcmp(argv[1],"bootfile") == 0) {
356 copy_filename (BootFile, argv[2], sizeof(BootFile));
359 #endif /* CFG_CMD_NET */
361 #ifdef CONFIG_AMIGAONEG3SE
362 if (strcmp(argv[1], "vga_fg_color") == 0 ||
363 strcmp(argv[1], "vga_bg_color") == 0 ) {
364 extern void video_set_color(unsigned char attr);
365 extern unsigned char video_get_attr(void);
367 video_set_color(video_get_attr());
370 #endif /* CONFIG_AMIGAONEG3SE */
375 void setenv (char *varname, char *varvalue)
377 char *argv[4] = { "setenv", varname, varvalue, NULL };
378 _do_setenv (0, 3, argv);
381 int do_setenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
384 printf ("Usage:\n%s\n", cmdtp->usage);
388 return _do_setenv (flag, argc, argv);
391 /************************************************************************
392 * Prompt for environment variable
395 #if (CONFIG_COMMANDS & CFG_CMD_ASKENV)
396 int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
398 extern char console_buffer[CFG_CBSIZE];
399 char message[CFG_CBSIZE];
400 int size = CFG_CBSIZE - 1;
404 local_args[0] = argv[0];
405 local_args[1] = argv[1];
406 local_args[2] = NULL;
407 local_args[3] = NULL;
410 printf ("Usage:\n%s\n", cmdtp->usage);
413 /* Check the syntax */
416 printf ("Usage:\n%s\n", cmdtp->usage);
419 case 2: /* askenv envname */
420 sprintf (message, "Please enter '%s':", argv[1]);
423 case 3: /* askenv envname size */
424 sprintf (message, "Please enter '%s':", argv[1]);
425 size = simple_strtoul (argv[2], NULL, 10);
428 default: /* askenv envname message1 ... messagen size */
433 for (i = 2; i < argc - 1; i++) {
435 message[pos++] = ' ';
437 strcpy (message+pos, argv[i]);
438 pos += strlen(argv[i]);
441 size = simple_strtoul (argv[argc - 1], NULL, 10);
446 if (size >= CFG_CBSIZE)
447 size = CFG_CBSIZE - 1;
452 /* prompt for input */
453 len = readline (message);
456 console_buffer[size] = '\0';
459 if (console_buffer[0] != '\0') {
460 local_args[2] = console_buffer;
464 /* Continue calling setenv code */
465 return _do_setenv (flag, len, local_args);
467 #endif /* CFG_CMD_ASKENV */
469 /************************************************************************
470 * Look up variable from environment,
471 * return address of storage for that variable,
472 * or NULL if not found
475 char *getenv (uchar *name)
481 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
484 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
485 if (nxt >= CFG_ENV_SIZE) {
489 if ((val=envmatch(name, i)) < 0)
491 return (env_get_addr(val));
497 int getenv_r (uchar *name, uchar *buf, unsigned len)
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 >= CFG_ENV_SIZE) {
509 if ((val=envmatch(name, i)) < 0)
511 /* found; copy out */
513 while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
522 #if defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) || \
523 ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_FLASH)) == \
524 (CFG_CMD_ENV|CFG_CMD_FLASH))
525 int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
527 extern char * env_name_spec;
529 printf ("Saving Environment to %s...\n", env_name_spec);
531 return (saveenv() ? 1 : 0);
536 /************************************************************************
537 * Match a name / name=value pair
539 * s1 is either a simple 'name', or a 'name=value' pair.
540 * i2 is the environment index for a 'name2=value2' pair.
541 * If the names match, return the index for the value2, else NULL.
545 envmatch (uchar *s1, int i2)
548 while (*s1 == env_get_char(i2++))
551 if (*s1 == '\0' && env_get_char(i2-1) == '=')