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,
31 #ifdef CFG_HUSH_PARSER
37 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
38 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); /* for do_reset() prototype */
41 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
44 #define MAX_DELAY_STOP_STR 32
46 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
47 static int parse_line (char *, char *[]);
48 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
49 static int abortboot(int);
54 char console_buffer[CFG_CBSIZE]; /* console I/O buffer */
56 static char erase_seq[] = "\b \b"; /* erase sequence */
57 static char tab_seq[] = " "; /* used to expand TABs */
59 #ifdef CONFIG_BOOT_RETRY_TIME
60 static uint64_t endtime = 0; /* must be set, default is instant timeout */
61 static int retry_time = -1; /* -1 so can call readline before main_loop */
64 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
66 #ifndef CONFIG_BOOT_RETRY_MIN
67 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
70 #ifdef CONFIG_MODEM_SUPPORT
72 extern void mdm_init(void); /* defined in board.c */
75 /***************************************************************************
76 * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
77 * returns: 0 - no key string, allow autoboot
78 * 1 - got key string, abort
80 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
81 # if defined(CONFIG_AUTOBOOT_KEYED)
82 static __inline__ int abortboot(int bootdelay)
85 uint64_t etime = endtick(bootdelay);
94 { str: getenv ("bootdelaykey"), retry: 1 },
95 { str: getenv ("bootdelaykey2"), retry: 1 },
96 { str: getenv ("bootstopkey"), retry: 0 },
97 { str: getenv ("bootstopkey2"), retry: 0 },
100 char presskey [MAX_DELAY_STOP_STR];
101 u_int presskey_len = 0;
102 u_int presskey_max = 0;
105 #ifdef CONFIG_SILENT_CONSOLE
107 DECLARE_GLOBAL_DATA_PTR;
109 if (gd->flags & GD_FLG_SILENT) {
110 /* Restore serial console */
111 console_assign (stdout, "serial");
112 console_assign (stderr, "serial");
117 # ifdef CONFIG_AUTOBOOT_PROMPT
118 printf (CONFIG_AUTOBOOT_PROMPT, bootdelay);
121 # ifdef CONFIG_AUTOBOOT_DELAY_STR
122 if (delaykey[0].str == NULL)
123 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
125 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
126 if (delaykey[1].str == NULL)
127 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
129 # ifdef CONFIG_AUTOBOOT_STOP_STR
130 if (delaykey[2].str == NULL)
131 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
133 # ifdef CONFIG_AUTOBOOT_STOP_STR2
134 if (delaykey[3].str == NULL)
135 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
138 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
139 delaykey[i].len = delaykey[i].str == NULL ?
140 0 : strlen (delaykey[i].str);
141 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
142 MAX_DELAY_STOP_STR : delaykey[i].len;
144 presskey_max = presskey_max > delaykey[i].len ?
145 presskey_max : delaykey[i].len;
148 printf("%s key:<%s>\n",
149 delaykey[i].retry ? "delay" : "stop",
150 delaykey[i].str ? delaykey[i].str : "NULL");
154 /* In order to keep up with incoming data, check timeout only
157 while (!abort && get_ticks() <= etime) {
158 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
159 if (delaykey[i].len > 0 &&
160 presskey_len >= delaykey[i].len &&
161 memcmp (presskey + presskey_len - delaykey[i].len,
163 delaykey[i].len) == 0) {
165 printf("got %skey\n",
166 delaykey[i].retry ? "delay" : "stop");
169 # ifdef CONFIG_BOOT_RETRY_TIME
170 /* don't retry auto boot */
171 if (! delaykey[i].retry)
179 if (presskey_len < presskey_max) {
180 presskey [presskey_len ++] = getc();
183 for (i = 0; i < presskey_max - 1; i ++)
184 presskey [i] = presskey [i + 1];
186 presskey [i] = getc();
192 puts ("key timeout\n");
195 #ifdef CONFIG_SILENT_CONSOLE
197 DECLARE_GLOBAL_DATA_PTR;
200 /* permanently enable normal console output */
201 gd->flags &= ~(GD_FLG_SILENT);
202 } else if (gd->flags & GD_FLG_SILENT) {
203 /* Restore silent console */
204 console_assign (stdout, "nulldev");
205 console_assign (stderr, "nulldev");
213 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
215 #ifdef CONFIG_MENUKEY
216 static int menukey = 0;
219 static __inline__ int abortboot(int bootdelay)
223 #ifdef CONFIG_SILENT_CONSOLE
225 DECLARE_GLOBAL_DATA_PTR;
227 if (gd->flags & GD_FLG_SILENT) {
228 /* Restore serial console */
229 console_assign (stdout, "serial");
230 console_assign (stderr, "serial");
235 #ifdef CONFIG_MENUPROMPT
236 printf(CONFIG_MENUPROMPT, bootdelay);
238 printf("Hit any key to stop autoboot: %2d ", bootdelay);
241 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
243 * Check if key already pressed
244 * Don't check if bootdelay < 0
246 if (bootdelay >= 0) {
247 if (tstc()) { /* we got a key press */
248 (void) getc(); /* consume input */
250 abort = 1; /* don't auto boot */
255 while ((bootdelay > 0) && (!abort)) {
259 /* delay 100 * 10ms */
260 for (i=0; !abort && i<100; ++i) {
261 if (tstc()) { /* we got a key press */
262 abort = 1; /* don't auto boot */
263 bootdelay = 0; /* no more delay */
264 # ifdef CONFIG_MENUKEY
267 (void) getc(); /* consume input */
274 printf ("\b\b\b%2d ", bootdelay);
279 #ifdef CONFIG_SILENT_CONSOLE
281 DECLARE_GLOBAL_DATA_PTR;
284 /* permanently enable normal console output */
285 gd->flags &= ~(GD_FLG_SILENT);
286 } else if (gd->flags & GD_FLG_SILENT) {
287 /* Restore silent console */
288 console_assign (stdout, "nulldev");
289 console_assign (stderr, "nulldev");
296 # endif /* CONFIG_AUTOBOOT_KEYED */
297 #endif /* CONFIG_BOOTDELAY >= 0 */
299 /****************************************************************************/
301 void main_loop (void)
303 #ifndef CFG_HUSH_PARSER
304 static char lastcommand[CFG_CBSIZE] = { 0, };
310 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
314 #ifdef CONFIG_PREBOOT
317 #ifdef CONFIG_BOOTCOUNT_LIMIT
318 unsigned long bootcount = 0;
319 unsigned long bootlimit = 0;
322 #endif /* CONFIG_BOOTCOUNT_LIMIT */
324 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
325 ulong bmp = 0; /* default bitmap */
326 extern int trab_vfd (ulong bitmap);
328 #ifdef CONFIG_MODEM_SUPPORT
330 bmp = 1; /* alternate bitmap */
333 #endif /* CONFIG_VFD && VFD_TEST_LOGO */
335 #ifdef CONFIG_BOOTCOUNT_LIMIT
336 bootcount = bootcount_load();
338 bootcount_store (bootcount);
339 sprintf (bcs_set, "%lu", bootcount);
340 setenv ("bootcount", bcs_set);
341 bcs = getenv ("bootlimit");
342 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
343 #endif /* CONFIG_BOOTCOUNT_LIMIT */
345 #ifdef CONFIG_MODEM_SUPPORT
346 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
348 uchar *str = strdup(getenv("mdm_cmd"));
349 setenv ("preboot", str); /* set or delete definition */
352 mdm_init(); /* wait for modem connection */
354 #endif /* CONFIG_MODEM_SUPPORT */
356 #ifdef CONFIG_VERSION_VARIABLE
358 extern char version_string[];
360 setenv ("ver", version_string); /* set version variable */
362 #endif /* CONFIG_VERSION_VARIABLE */
364 #ifdef CFG_HUSH_PARSER
365 u_boot_hush_start ();
368 #ifdef CONFIG_AUTO_COMPLETE
369 install_auto_complete();
372 #ifdef CONFIG_PREBOOT
373 if ((p = getenv ("preboot")) != NULL) {
374 # ifdef CONFIG_AUTOBOOT_KEYED
375 int prev = disable_ctrlc(1); /* disable Control C checking */
378 # ifndef CFG_HUSH_PARSER
381 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
382 FLAG_EXIT_FROM_LOOP);
385 # ifdef CONFIG_AUTOBOOT_KEYED
386 disable_ctrlc(prev); /* restore Control C checking */
389 #endif /* CONFIG_PREBOOT */
391 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
392 s = getenv ("bootdelay");
393 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
395 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
397 # ifdef CONFIG_BOOT_RETRY_TIME
399 # endif /* CONFIG_BOOT_RETRY_TIME */
401 #ifdef CONFIG_BOOTCOUNT_LIMIT
402 if (bootlimit && (bootcount > bootlimit)) {
403 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
404 (unsigned)bootlimit);
405 s = getenv ("altbootcmd");
408 #endif /* CONFIG_BOOTCOUNT_LIMIT */
409 s = getenv ("bootcmd");
411 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
413 if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
414 # ifdef CONFIG_AUTOBOOT_KEYED
415 int prev = disable_ctrlc(1); /* disable Control C checking */
418 # ifndef CFG_HUSH_PARSER
421 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
422 FLAG_EXIT_FROM_LOOP);
425 # ifdef CONFIG_AUTOBOOT_KEYED
426 disable_ctrlc(prev); /* restore Control C checking */
430 # ifdef CONFIG_MENUKEY
431 if (menukey == CONFIG_MENUKEY) {
432 s = getenv("menucmd");
434 # ifndef CFG_HUSH_PARSER
437 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
438 FLAG_EXIT_FROM_LOOP);
442 #endif /* CONFIG_MENUKEY */
443 #endif /* CONFIG_BOOTDELAY */
445 #ifdef CONFIG_AMIGAONEG3SE
447 extern void video_banner(void);
453 * Main Loop for Monitor Command Processing
455 #ifdef CFG_HUSH_PARSER
457 /* This point is never reached */
461 #ifdef CONFIG_BOOT_RETRY_TIME
463 /* Saw enough of a valid command to
464 * restart the timeout.
469 len = readline (CFG_PROMPT);
471 flag = 0; /* assume no special flags for now */
473 strcpy (lastcommand, console_buffer);
475 flag |= CMD_FLAG_REPEAT;
476 #ifdef CONFIG_BOOT_RETRY_TIME
477 else if (len == -2) {
478 /* -2 means timed out, retry autoboot
480 puts ("\nTimed out waiting for command\n");
481 # ifdef CONFIG_RESET_TO_RETRY
482 /* Reinit board to run initialization code again */
483 do_reset (NULL, 0, 0, NULL);
485 return; /* retry autoboot */
491 puts ("<INTERRUPT>\n");
493 rc = run_command (lastcommand, flag);
496 /* invalid command or not repeatable, forget it */
500 #endif /*CFG_HUSH_PARSER*/
503 #ifdef CONFIG_BOOT_RETRY_TIME
504 /***************************************************************************
505 * initialise command line timeout
507 void init_cmd_timeout(void)
509 char *s = getenv ("bootretry");
512 retry_time = (int)simple_strtol(s, NULL, 10);
514 retry_time = CONFIG_BOOT_RETRY_TIME;
516 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
517 retry_time = CONFIG_BOOT_RETRY_MIN;
520 /***************************************************************************
521 * reset command line timeout to retry_time seconds
523 void reset_cmd_timeout(void)
525 endtime = endtick(retry_time);
529 /****************************************************************************/
532 * Prompt for input and read a line.
533 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
534 * time out when time goes past endtime (timebase time in ticks).
535 * Return: number of read characters
539 int readline (const char *const prompt)
541 char *p = console_buffer;
542 int n = 0; /* buffer index */
543 int plen = 0; /* prompt length */
544 int col; /* output column cnt */
549 plen = strlen (prompt);
555 #ifdef CONFIG_BOOT_RETRY_TIME
556 while (!tstc()) { /* while no incoming data */
557 if (retry_time >= 0 && get_ticks() > endtime)
558 return (-2); /* timed out */
561 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
563 #ifdef CONFIG_SHOW_ACTIVITY
565 extern void show_activity(int arg);
572 * Special character handling
575 case '\r': /* Enter */
579 return (p - console_buffer);
584 case 0x03: /* ^C - break */
585 console_buffer[0] = '\0'; /* discard input */
588 case 0x15: /* ^U - erase line */
597 case 0x17: /* ^W - erase word */
598 p=delete_char(console_buffer, p, &col, &n, plen);
599 while ((n > 0) && (*p != ' ')) {
600 p=delete_char(console_buffer, p, &col, &n, plen);
604 case 0x08: /* ^H - backspace */
605 case 0x7F: /* DEL - backspace */
606 p=delete_char(console_buffer, p, &col, &n, plen);
611 * Must be a normal character then
613 if (n < CFG_CBSIZE-2) {
614 if (c == '\t') { /* expand TABs */
615 #ifdef CONFIG_AUTO_COMPLETE
616 /* if auto completion triggered just continue */
618 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
619 p = console_buffer + n; /* reset */
623 puts (tab_seq+(col&07));
626 ++col; /* echo input */
631 } else { /* Buffer full */
638 /****************************************************************************/
640 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
648 if (*(--p) == '\t') { /* will retype the whole line */
649 while (*colp > plen) {
653 for (s=buffer; s<p; ++s) {
655 puts (tab_seq+((*colp) & 07));
656 *colp += 8 - ((*colp) & 07);
670 /****************************************************************************/
672 int parse_line (char *line, char *argv[])
677 printf ("parse_line: \"%s\"\n", line);
679 while (nargs < CFG_MAXARGS) {
681 /* skip any white space */
682 while ((*line == ' ') || (*line == '\t')) {
686 if (*line == '\0') { /* end of line, no more args */
689 printf ("parse_line: nargs=%d\n", nargs);
694 argv[nargs++] = line; /* begin of argument string */
696 /* find end of string */
697 while (*line && (*line != ' ') && (*line != '\t')) {
701 if (*line == '\0') { /* end of line, no more args */
704 printf ("parse_line: nargs=%d\n", nargs);
709 *line++ = '\0'; /* terminate current arg */
712 printf ("** Too many args (max. %d) **\n", CFG_MAXARGS);
715 printf ("parse_line: nargs=%d\n", nargs);
720 /****************************************************************************/
722 static void process_macros (const char *input, char *output)
725 const char *varname_start = NULL;
726 int inputcnt = strlen (input);
727 int outputcnt = CFG_CBSIZE;
728 int state = 0; /* 0 = waiting for '$' */
729 /* 1 = waiting for '(' or '{' */
730 /* 2 = waiting for ')' or '}' */
731 /* 3 = waiting for ''' */
733 char *output_start = output;
735 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen(input), input);
738 prev = '\0'; /* previous character */
740 while (inputcnt && outputcnt) {
745 /* remove one level of escape characters */
746 if ((c == '\\') && (prev != '\\')) {
755 case 0: /* Waiting for (unescaped) $ */
756 if ((c == '\'') && (prev != '\\')) {
760 if ((c == '$') && (prev != '\\')) {
767 case 1: /* Waiting for ( */
768 if (c == '(' || c == '{') {
770 varname_start = input;
782 case 2: /* Waiting for ) */
783 if (c == ')' || c == '}') {
785 char envname[CFG_CBSIZE], *envval;
786 int envcnt = input-varname_start-1; /* Varname # of chars */
788 /* Get the varname */
789 for (i = 0; i < envcnt; i++) {
790 envname[i] = varname_start[i];
795 envval = getenv (envname);
797 /* Copy into the line if it exists */
799 while ((*envval) && outputcnt) {
800 *(output++) = *(envval++);
803 /* Look for another '$' */
807 case 3: /* Waiting for ' */
808 if ((c == '\'') && (prev != '\\')) {
823 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
824 strlen(output_start), output_start);
828 /****************************************************************************
830 * 1 - command executed, repeatable
831 * 0 - command executed but not repeatable, interrupted commands are
832 * always considered not repeatable
833 * -1 - not executed (unrecognized, bootd recursion or too many args)
834 * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is
835 * considered unrecognized)
839 * We must create a temporary copy of the command since the command we get
840 * may be the result from getenv(), which returns a pointer directly to
841 * the environment data, which may change magicly when the command we run
842 * creates or modifies environment variables (like "bootp" does).
845 int run_command (const char *cmd, int flag)
848 char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */
849 char *token; /* start of token in cmdbuf */
850 char *sep; /* end of token (separator) in cmdbuf */
851 char finaltoken[CFG_CBSIZE];
853 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */
859 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
860 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
864 clear_ctrlc(); /* forget any previous Control C */
867 return -1; /* empty command */
870 if (strlen(cmd) >= CFG_CBSIZE) {
871 puts ("## Command too long!\n");
875 strcpy (cmdbuf, cmd);
877 /* Process separators and check for invalid
878 * repeatable commands
882 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
887 * Find separator, or string end
888 * Allow simple escape of ';' by writing "\;"
890 for (inquotes = 0, sep = str; *sep; sep++) {
896 (*sep == ';') && /* separator */
897 ( sep != str) && /* past string start */
898 (*(sep-1) != '\\')) /* and NOT escaped */
903 * Limit the token to data between separators
907 str = sep + 1; /* start of command for next pass */
911 str = sep; /* no more commands for next pass */
913 printf ("token: \"%s\"\n", token);
916 /* find macros in this token and replace them */
917 process_macros (token, finaltoken);
919 /* Extract arguments */
920 argc = parse_line (finaltoken, argv);
922 /* Look up command in command table */
923 if ((cmdtp = find_cmd(argv[0])) == NULL) {
924 printf ("Unknown command '%s' - try 'help'\n", argv[0]);
925 rc = -1; /* give up after bad command */
929 /* found - check max args */
930 if (argc > cmdtp->maxargs) {
931 printf ("Usage:\n%s\n", cmdtp->usage);
936 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD)
937 /* avoid "bootd" recursion */
938 if (cmdtp->cmd == do_bootd) {
940 printf ("[%s]\n", finaltoken);
942 if (flag & CMD_FLAG_BOOTD) {
943 puts ("'bootd' recursion detected\n");
948 flag |= CMD_FLAG_BOOTD;
950 #endif /* CFG_CMD_BOOTD */
952 /* OK - call function to do the command */
953 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
957 repeatable &= cmdtp->repeatable;
959 /* Did the user stop this? */
961 return 0; /* if stopped then not repeatable */
964 return rc ? rc : repeatable;
967 /****************************************************************************/
969 #if (CONFIG_COMMANDS & CFG_CMD_RUN)
970 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
975 printf ("Usage:\n%s\n", cmdtp->usage);
979 for (i=1; i<argc; ++i) {
982 if ((arg = getenv (argv[i])) == NULL) {
983 printf ("## Error: \"%s\" not defined\n", argv[i]);
986 #ifndef CFG_HUSH_PARSER
987 if (run_command (arg, flag) == -1)
990 if (parse_string_outer(arg,
991 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
997 #endif /* CFG_CMD_RUN */