3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <cmd_nvedit.h>
30 #include <cmd_bootm.h>
32 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
33 #include <cmd_boot.h> /* for do_reset() prototype */
36 #ifdef CFG_HUSH_PARSER
40 #define MAX_DELAY_STOP_STR 32
42 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
43 static int parse_line (char *, char *[]);
44 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
45 static int abortboot(int);
50 char console_buffer[CFG_CBSIZE]; /* console I/O buffer */
52 static char erase_seq[] = "\b \b"; /* erase sequence */
53 static char tab_seq[] = " "; /* used to expand TABs */
55 #ifdef CONFIG_BOOT_RETRY_TIME
56 static uint64_t endtime = 0; /* must be set, default is instant timeout */
57 static int retry_time = -1; /* -1 so can call readline before main_loop */
60 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
62 #ifndef CONFIG_BOOT_RETRY_MIN
63 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
66 #ifdef CONFIG_MODEM_SUPPORT
68 extern void mdm_init(void); /* defined in board.c */
71 /***************************************************************************
72 * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
73 * returns: 0 - no key string, allow autoboot
74 * 1 - got key string, abort
76 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
77 # if defined(CONFIG_AUTOBOOT_KEYED)
78 static __inline__ int abortboot(int bootdelay)
81 uint64_t etime = endtick(bootdelay);
90 { str: getenv ("bootdelaykey"), retry: 1 },
91 { str: getenv ("bootdelaykey2"), retry: 1 },
92 { str: getenv ("bootstopkey"), retry: 0 },
93 { str: getenv ("bootstopkey2"), retry: 0 },
96 char presskey [MAX_DELAY_STOP_STR];
97 u_int presskey_len = 0;
98 u_int presskey_max = 0;
101 # ifdef CONFIG_AUTOBOOT_PROMPT
102 printf (CONFIG_AUTOBOOT_PROMPT, bootdelay);
105 # ifdef CONFIG_AUTOBOOT_DELAY_STR
106 if (delaykey[0].str == NULL)
107 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
109 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
110 if (delaykey[1].str == NULL)
111 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
113 # ifdef CONFIG_AUTOBOOT_STOP_STR
114 if (delaykey[2].str == NULL)
115 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
117 # ifdef CONFIG_AUTOBOOT_STOP_STR2
118 if (delaykey[3].str == NULL)
119 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
122 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
123 delaykey[i].len = delaykey[i].str == NULL ?
124 0 : strlen (delaykey[i].str);
125 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
126 MAX_DELAY_STOP_STR : delaykey[i].len;
128 presskey_max = presskey_max > delaykey[i].len ?
129 presskey_max : delaykey[i].len;
132 printf("%s key:<%s>\n",
133 delaykey[i].retry ? "delay" : "stop",
134 delaykey[i].str ? delaykey[i].str : "NULL");
138 /* In order to keep up with incoming data, check timeout only
141 while (!abort && get_ticks() <= etime) {
142 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
143 if (delaykey[i].len > 0 &&
144 presskey_len >= delaykey[i].len &&
145 memcmp (presskey + presskey_len - delaykey[i].len,
147 delaykey[i].len) == 0) {
149 printf("got %skey\n",
150 delaykey[i].retry ? "delay" : "stop");
153 # ifdef CONFIG_BOOT_RETRY_TIME
154 /* don't retry auto boot */
155 if (! delaykey[i].retry)
163 if (presskey_len < presskey_max) {
164 presskey [presskey_len ++] = getc();
167 for (i = 0; i < presskey_max - 1; i ++)
168 presskey [i] = presskey [i + 1];
170 presskey [i] = getc();
176 printf("key timeout\n");
182 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
184 #ifdef CONFIG_MENUKEY
185 static int menukey = 0;
188 static __inline__ int abortboot(int bootdelay)
192 #ifdef CONFIG_MENUPROMPT
193 printf(CONFIG_MENUPROMPT, bootdelay);
195 printf("Hit any key to stop autoboot: %2d ", bootdelay);
198 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
200 * Check if key already pressed
201 * Don't check if bootdelay < 0
203 if (bootdelay >= 0) {
204 if (tstc()) { /* we got a key press */
205 (void) getc(); /* consume input */
206 printf ("\b\b\b 0\n");
207 return 1; /* don't auto boot */
212 while (bootdelay > 0) {
216 /* delay 100 * 10ms */
217 for (i=0; !abort && i<100; ++i) {
218 if (tstc()) { /* we got a key press */
219 abort = 1; /* don't auto boot */
220 bootdelay = 0; /* no more delay */
221 # ifdef CONFIG_MENUKEY
224 (void) getc(); /* consume input */
231 printf ("\b\b\b%2d ", bootdelay);
238 # endif /* CONFIG_AUTOBOOT_KEYED */
239 #endif /* CONFIG_BOOTDELAY >= 0 */
241 /****************************************************************************/
243 void main_loop (void)
245 #ifndef CFG_HUSH_PARSER
246 static char lastcommand[CFG_CBSIZE] = { 0, };
252 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
256 #ifdef CONFIG_PREBOOT
260 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
261 ulong bmp = 0; /* default bitmap */
262 extern int trab_vfd (ulong bitmap);
264 #ifdef CONFIG_MODEM_SUPPORT
266 bmp = 1; /* alternate bitmap */
269 #endif /* CONFIG_VFD && VFD_TEST_LOGO */
271 #ifdef CONFIG_MODEM_SUPPORT
272 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
274 uchar *str = strdup(getenv("mdm_cmd"));
275 setenv ("preboot", str); /* set or delete definition */
278 mdm_init(); /* wait for modem connection */
280 #endif /* CONFIG_MODEM_SUPPORT */
282 #ifdef CONFIG_VERSION_VARIABLE
284 extern char version_string[];
285 char *str = getenv("ver");
288 setenv ("ver", version_string); /* set version variable */
290 #endif /* CONFIG_VERSION_VARIABLE */
292 #ifdef CFG_HUSH_PARSER
293 u_boot_hush_start ();
296 #ifdef CONFIG_PREBOOT
297 if ((p = getenv ("preboot")) != NULL) {
298 # ifdef CONFIG_AUTOBOOT_KEYED
299 int prev = disable_ctrlc(1); /* disable Control C checking */
302 # ifndef CFG_HUSH_PARSER
305 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
306 FLAG_EXIT_FROM_LOOP);
309 # ifdef CONFIG_AUTOBOOT_KEYED
310 disable_ctrlc(prev); /* restore Control C checking */
313 #endif /* CONFIG_PREBOOT */
315 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
316 s = getenv ("bootdelay");
317 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
319 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
321 # ifdef CONFIG_BOOT_RETRY_TIME
322 s = getenv ("bootretry");
324 retry_time = (int)simple_strtoul(s, NULL, 10);
326 retry_time = CONFIG_BOOT_RETRY_TIME;
327 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
328 retry_time = CONFIG_BOOT_RETRY_MIN;
329 # endif /* CONFIG_BOOT_RETRY_TIME */
331 s = getenv ("bootcmd");
333 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
335 if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
336 # ifdef CONFIG_AUTOBOOT_KEYED
337 int prev = disable_ctrlc(1); /* disable Control C checking */
340 # ifndef CFG_HUSH_PARSER
343 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
344 FLAG_EXIT_FROM_LOOP);
347 # ifdef CONFIG_AUTOBOOT_KEYED
348 disable_ctrlc(prev); /* restore Control C checking */
352 # ifdef CONFIG_MENUKEY
353 if (menukey == CONFIG_MENUKEY) {
354 s = getenv("menucmd");
356 # ifndef CFG_HUSH_PARSER
357 run_command (s, bd, 0);
359 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
360 FLAG_EXIT_FROM_LOOP);
364 #endif /* CONFIG_MENUKEY */
365 #endif /* CONFIG_BOOTDELAY */
367 #ifdef CONFIG_AMIGAONEG3SE
369 extern void video_banner(void);
375 * Main Loop for Monitor Command Processing
377 #ifdef CFG_HUSH_PARSER
379 /* This point is never reached */
383 #ifdef CONFIG_BOOT_RETRY_TIME
385 /* Saw enough of a valid command to
386 * restart the timeout.
391 len = readline (CFG_PROMPT);
393 flag = 0; /* assume no special flags for now */
395 strcpy (lastcommand, console_buffer);
397 flag |= CMD_FLAG_REPEAT;
398 #ifdef CONFIG_BOOT_RETRY_TIME
399 else if (len == -2) {
400 /* -2 means timed out, retry autoboot
402 printf("\nTimed out waiting for command\n");
403 # ifdef CONFIG_RESET_TO_RETRY
404 /* Reinit board to run initialization code again */
405 do_reset (NULL, 0, 0, NULL);
407 return; /* retry autoboot */
413 printf ("<INTERRUPT>\n");
415 rc = run_command (lastcommand, flag);
418 /* invalid command or not repeatable, forget it */
422 #endif /*CFG_HUSH_PARSER*/
425 /***************************************************************************
426 * reset command line timeout to retry_time seconds
428 #ifdef CONFIG_BOOT_RETRY_TIME
429 void reset_cmd_timeout(void)
431 endtime = endtick(retry_time);
435 /****************************************************************************/
438 * Prompt for input and read a line.
439 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
440 * time out when time goes past endtime (timebase time in ticks).
441 * Return: number of read characters
445 int readline (const char *const prompt)
447 char *p = console_buffer;
448 int n = 0; /* buffer index */
449 int plen = 0; /* prompt length */
450 int col; /* output column cnt */
455 plen = strlen (prompt);
461 #ifdef CONFIG_BOOT_RETRY_TIME
462 while (!tstc()) { /* while no incoming data */
463 if (retry_time >= 0 && get_ticks() > endtime)
464 return (-2); /* timed out */
467 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
469 #ifdef CONFIG_SHOW_ACTIVITY
471 extern void show_activity(int arg);
478 * Special character handling
481 case '\r': /* Enter */
485 return (p - console_buffer);
487 case 0x03: /* ^C - break */
488 console_buffer[0] = '\0'; /* discard input */
491 case 0x15: /* ^U - erase line */
500 case 0x17: /* ^W - erase word */
501 p=delete_char(console_buffer, p, &col, &n, plen);
502 while ((n > 0) && (*p != ' ')) {
503 p=delete_char(console_buffer, p, &col, &n, plen);
507 case 0x08: /* ^H - backspace */
508 case 0x7F: /* DEL - backspace */
509 p=delete_char(console_buffer, p, &col, &n, plen);
514 * Must be a normal character then
516 if (n < CFG_CBSIZE-2) {
517 if (c == '\t') { /* expand TABs */
518 puts (tab_seq+(col&07));
521 ++col; /* echo input */
526 } else { /* Buffer full */
533 /****************************************************************************/
535 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
543 if (*(--p) == '\t') { /* will retype the whole line */
544 while (*colp > plen) {
548 for (s=buffer; s<p; ++s) {
550 puts (tab_seq+((*colp) & 07));
551 *colp += 8 - ((*colp) & 07);
565 /****************************************************************************/
567 int parse_line (char *line, char *argv[])
572 printf ("parse_line: \"%s\"\n", line);
574 while (nargs < CFG_MAXARGS) {
576 /* skip any white space */
577 while ((*line == ' ') || (*line == '\t')) {
581 if (*line == '\0') { /* end of line, no more args */
584 printf ("parse_line: nargs=%d\n", nargs);
589 argv[nargs++] = line; /* begin of argument string */
591 /* find end of string */
592 while (*line && (*line != ' ') && (*line != '\t')) {
596 if (*line == '\0') { /* end of line, no more args */
599 printf ("parse_line: nargs=%d\n", nargs);
604 *line++ = '\0'; /* terminate current arg */
607 printf ("** Too many args (max. %d) **\n", CFG_MAXARGS);
610 printf ("parse_line: nargs=%d\n", nargs);
615 /****************************************************************************/
617 static void process_macros (const char *input, char *output)
620 const char *varname_start = NULL;
621 int inputcnt = strlen (input);
622 int outputcnt = CFG_CBSIZE;
623 int state = 0; /* 0 = waiting for '$' */
624 /* 1 = waiting for '(' */
625 /* 2 = waiting for ')' */
626 /* 3 = waiting for ''' */
628 char *output_start = output;
630 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen(input), input);
633 prev = '\0'; /* previous character */
635 while (inputcnt && outputcnt) {
640 /* remove one level of escape characters */
641 if ((c == '\\') && (prev != '\\')) {
650 case 0: /* Waiting for (unescaped) $ */
651 if ((c == '\'') && (prev != '\\')) {
655 if ((c == '$') && (prev != '\\')) {
662 case 1: /* Waiting for ( */
665 varname_start = input;
677 case 2: /* Waiting for ) */
680 char envname[CFG_CBSIZE], *envval;
681 int envcnt = input-varname_start-1; /* Varname # of chars */
683 /* Get the varname */
684 for (i = 0; i < envcnt; i++) {
685 envname[i] = varname_start[i];
690 envval = getenv (envname);
692 /* Copy into the line if it exists */
694 while ((*envval) && outputcnt) {
695 *(output++) = *(envval++);
698 /* Look for another '$' */
702 case 3: /* Waiting for ' */
703 if ((c == '\'') && (prev != '\\')) {
718 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
719 strlen(output_start), output_start);
723 /****************************************************************************
725 * 1 - command executed, repeatable
726 * 0 - command executed but not repeatable, interrupted commands are
727 * always considered not repeatable
728 * -1 - not executed (unrecognized, bootd recursion or too many args)
729 * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is
730 * considered unrecognized)
734 * We must create a temporary copy of the command since the command we get
735 * may be the result from getenv(), which returns a pointer directly to
736 * the environment data, which may change magicly when the command we run
737 * creates or modifies environment variables (like "bootp" does).
740 int run_command (const char *cmd, int flag)
743 char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */
744 char *token; /* start of token in cmdbuf */
745 char *sep; /* end of token (separator) in cmdbuf */
746 char finaltoken[CFG_CBSIZE];
748 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */
754 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
755 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
759 clear_ctrlc(); /* forget any previous Control C */
762 return -1; /* empty command */
765 if (strlen(cmd) >= CFG_CBSIZE) {
766 puts ("## Command too long!\n");
770 strcpy (cmdbuf, cmd);
772 /* Process separators and check for invalid
773 * repeatable commands
777 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
782 * Find separator, or string end
783 * Allow simple escape of ';' by writing "\;"
785 for (inquotes = 0, sep = str; *sep; sep++) {
791 (*sep == ';') && /* separator */
792 ( sep != str) && /* past string start */
793 (*(sep-1) != '\\')) /* and NOT escaped */
798 * Limit the token to data between separators
802 str = sep + 1; /* start of command for next pass */
806 str = sep; /* no more commands for next pass */
808 printf ("token: \"%s\"\n", token);
811 /* find macros in this token and replace them */
812 process_macros (token, finaltoken);
814 /* Extract arguments */
815 argc = parse_line (finaltoken, argv);
817 /* Look up command in command table */
818 if ((cmdtp = find_cmd(argv[0])) == NULL) {
819 printf ("Unknown command '%s' - try 'help'\n", argv[0]);
820 return -1; /* give up after bad command */
823 /* found - check max args */
824 if (argc > cmdtp->maxargs) {
825 printf ("Usage:\n%s\n", cmdtp->usage);
829 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD)
830 /* avoid "bootd" recursion */
831 if (cmdtp->cmd == do_bootd) {
833 printf ("[%s]\n", finaltoken);
835 if (flag & CMD_FLAG_BOOTD) {
836 printf ("'bootd' recursion detected\n");
840 flag |= CMD_FLAG_BOOTD;
842 #endif /* CFG_CMD_BOOTD */
844 /* OK - call function to do the command */
845 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
849 repeatable &= cmdtp->repeatable;
851 /* Did the user stop this? */
853 return 0; /* if stopped then not repeatable */
859 /****************************************************************************/
861 #if (CONFIG_COMMANDS & CFG_CMD_RUN)
862 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
867 printf ("Usage:\n%s\n", cmdtp->usage);
871 for (i=1; i<argc; ++i) {
874 if ((arg = getenv (argv[i])) == NULL) {
875 printf ("## Error: \"%s\" not defined\n", argv[i]);
878 #ifndef CFG_HUSH_PARSER
879 if (run_command (arg, flag) == -1)
882 if (parse_string_outer(arg,
883 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
889 #endif /* CFG_CMD_RUN */