Merge branch 'master' of git://www.denx.de/git/u-boot-mpc86xx
[platform/kernel/u-boot.git] / common / main.c
1 /*
2  * (C) Copyright 2000
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * Add to readline cmdline-editing by
6  * (C) Copyright 2005
7  * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
8  *
9  * See file CREDITS for list of people who contributed to this
10  * project.
11  *
12  * This program is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU General Public License as
14  * published by the Free Software Foundation; either version 2 of
15  * the License, or (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25  * MA 02111-1307 USA
26  */
27
28 /* #define      DEBUG   */
29
30 #include <common.h>
31 #include <watchdog.h>
32 #include <command.h>
33 #ifdef CONFIG_MODEM_SUPPORT
34 #include <malloc.h>             /* for free() prototype */
35 #endif
36
37 #ifdef CFG_HUSH_PARSER
38 #include <hush.h>
39 #endif
40
41 #include <post.h>
42
43 #ifdef CONFIG_SILENT_CONSOLE
44 DECLARE_GLOBAL_DATA_PTR;
45 #endif
46
47 /*
48  * Board-specific Platform code can reimplement show_boot_progress () if needed
49  */
50 void inline __show_boot_progress (int val) {}
51 void inline show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
52
53 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
54 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);               /* for do_reset() prototype */
55 #endif
56
57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
58
59
60 #define MAX_DELAY_STOP_STR 32
61
62 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
63 static int abortboot(int);
64 #endif
65
66 #undef DEBUG_PARSER
67
68 char        console_buffer[CFG_CBSIZE];         /* console I/O buffer   */
69
70 #ifndef CONFIG_CMDLINE_EDITING
71 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
72 static char erase_seq[] = "\b \b";              /* erase sequence       */
73 static char   tab_seq[] = "        ";           /* used to expand TABs  */
74 #endif /* CONFIG_CMDLINE_EDITING */
75
76 #ifdef CONFIG_BOOT_RETRY_TIME
77 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
78 static int      retry_time = -1; /* -1 so can call readline before main_loop */
79 #endif
80
81 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
82
83 #ifndef CONFIG_BOOT_RETRY_MIN
84 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
85 #endif
86
87 #ifdef CONFIG_MODEM_SUPPORT
88 int do_mdm_init = 0;
89 extern void mdm_init(void); /* defined in board.c */
90 #endif
91
92 /***************************************************************************
93  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
94  * returns: 0 -  no key string, allow autoboot
95  *          1 - got key string, abort
96  */
97 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
98 # if defined(CONFIG_AUTOBOOT_KEYED)
99 static __inline__ int abortboot(int bootdelay)
100 {
101         int abort = 0;
102         uint64_t etime = endtick(bootdelay);
103         struct {
104                 char* str;
105                 u_int len;
106                 int retry;
107         }
108         delaykey [] = {
109                 { str: getenv ("bootdelaykey"),  retry: 1 },
110                 { str: getenv ("bootdelaykey2"), retry: 1 },
111                 { str: getenv ("bootstopkey"),   retry: 0 },
112                 { str: getenv ("bootstopkey2"),  retry: 0 },
113         };
114
115         char presskey [MAX_DELAY_STOP_STR];
116         u_int presskey_len = 0;
117         u_int presskey_max = 0;
118         u_int i;
119
120 #  ifdef CONFIG_AUTOBOOT_PROMPT
121         printf(CONFIG_AUTOBOOT_PROMPT, bootdelay);
122 #  endif
123
124 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
125         if (delaykey[0].str == NULL)
126                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
127 #  endif
128 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
129         if (delaykey[1].str == NULL)
130                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
131 #  endif
132 #  ifdef CONFIG_AUTOBOOT_STOP_STR
133         if (delaykey[2].str == NULL)
134                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
135 #  endif
136 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
137         if (delaykey[3].str == NULL)
138                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
139 #  endif
140
141         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
142                 delaykey[i].len = delaykey[i].str == NULL ?
143                                     0 : strlen (delaykey[i].str);
144                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
145                                     MAX_DELAY_STOP_STR : delaykey[i].len;
146
147                 presskey_max = presskey_max > delaykey[i].len ?
148                                     presskey_max : delaykey[i].len;
149
150 #  if DEBUG_BOOTKEYS
151                 printf("%s key:<%s>\n",
152                        delaykey[i].retry ? "delay" : "stop",
153                        delaykey[i].str ? delaykey[i].str : "NULL");
154 #  endif
155         }
156
157         /* In order to keep up with incoming data, check timeout only
158          * when catch up.
159          */
160         while (!abort && get_ticks() <= etime) {
161                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
162                         if (delaykey[i].len > 0 &&
163                             presskey_len >= delaykey[i].len &&
164                             memcmp (presskey + presskey_len - delaykey[i].len,
165                                     delaykey[i].str,
166                                     delaykey[i].len) == 0) {
167 #  if DEBUG_BOOTKEYS
168                                 printf("got %skey\n",
169                                        delaykey[i].retry ? "delay" : "stop");
170 #  endif
171
172 #  ifdef CONFIG_BOOT_RETRY_TIME
173                                 /* don't retry auto boot */
174                                 if (! delaykey[i].retry)
175                                         retry_time = -1;
176 #  endif
177                                 abort = 1;
178                         }
179                 }
180
181                 if (tstc()) {
182                         if (presskey_len < presskey_max) {
183                                 presskey [presskey_len ++] = getc();
184                         }
185                         else {
186                                 for (i = 0; i < presskey_max - 1; i ++)
187                                         presskey [i] = presskey [i + 1];
188
189                                 presskey [i] = getc();
190                         }
191                 }
192         }
193 #  if DEBUG_BOOTKEYS
194         if (!abort)
195                 puts("key timeout\n");
196 #  endif
197
198 #ifdef CONFIG_SILENT_CONSOLE
199         if (abort)
200                 gd->flags &= ~GD_FLG_SILENT;
201 #endif
202
203         return abort;
204 }
205
206 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
207
208 #ifdef CONFIG_MENUKEY
209 static int menukey = 0;
210 #endif
211
212 static __inline__ int abortboot(int bootdelay)
213 {
214         int abort = 0;
215
216 #ifdef CONFIG_MENUPROMPT
217         printf(CONFIG_MENUPROMPT, bootdelay);
218 #else
219         printf("Hit any key to stop autoboot: %2d ", bootdelay);
220 #endif
221
222 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
223         /*
224          * Check if key already pressed
225          * Don't check if bootdelay < 0
226          */
227         if (bootdelay >= 0) {
228                 if (tstc()) {   /* we got a key press   */
229                         (void) getc();  /* consume input        */
230                         puts ("\b\b\b 0");
231                         abort = 1;      /* don't auto boot      */
232                 }
233         }
234 #endif
235
236         while ((bootdelay > 0) && (!abort)) {
237                 int i;
238
239                 --bootdelay;
240                 /* delay 100 * 10ms */
241                 for (i=0; !abort && i<100; ++i) {
242                         if (tstc()) {   /* we got a key press   */
243                                 abort  = 1;     /* don't auto boot      */
244                                 bootdelay = 0;  /* no more delay        */
245 # ifdef CONFIG_MENUKEY
246                                 menukey = getc();
247 # else
248                                 (void) getc();  /* consume input        */
249 # endif
250                                 break;
251                         }
252                         udelay(10000);
253                 }
254
255                 printf("\b\b\b%2d ", bootdelay);
256         }
257
258         putc('\n');
259
260 #ifdef CONFIG_SILENT_CONSOLE
261         if (abort)
262                 gd->flags &= ~GD_FLG_SILENT;
263 #endif
264
265         return abort;
266 }
267 # endif /* CONFIG_AUTOBOOT_KEYED */
268 #endif  /* CONFIG_BOOTDELAY >= 0  */
269
270 /****************************************************************************/
271
272 void main_loop (void)
273 {
274 #ifndef CFG_HUSH_PARSER
275         static char lastcommand[CFG_CBSIZE] = { 0, };
276         int len;
277         int rc = 1;
278         int flag;
279 #endif
280
281 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
282         char *s;
283         int bootdelay;
284 #endif
285 #ifdef CONFIG_PREBOOT
286         char *p;
287 #endif
288 #ifdef CONFIG_BOOTCOUNT_LIMIT
289         unsigned long bootcount = 0;
290         unsigned long bootlimit = 0;
291         char *bcs;
292         char bcs_set[16];
293 #endif /* CONFIG_BOOTCOUNT_LIMIT */
294
295 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
296         ulong bmp = 0;          /* default bitmap */
297         extern int trab_vfd (ulong bitmap);
298
299 #ifdef CONFIG_MODEM_SUPPORT
300         if (do_mdm_init)
301                 bmp = 1;        /* alternate bitmap */
302 #endif
303         trab_vfd (bmp);
304 #endif  /* CONFIG_VFD && VFD_TEST_LOGO */
305
306 #ifdef CONFIG_BOOTCOUNT_LIMIT
307         bootcount = bootcount_load();
308         bootcount++;
309         bootcount_store (bootcount);
310         sprintf (bcs_set, "%lu", bootcount);
311         setenv ("bootcount", bcs_set);
312         bcs = getenv ("bootlimit");
313         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
314 #endif /* CONFIG_BOOTCOUNT_LIMIT */
315
316 #ifdef CONFIG_MODEM_SUPPORT
317         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
318         if (do_mdm_init) {
319                 char *str = strdup(getenv("mdm_cmd"));
320                 setenv ("preboot", str);  /* set or delete definition */
321                 if (str != NULL)
322                         free (str);
323                 mdm_init(); /* wait for modem connection */
324         }
325 #endif  /* CONFIG_MODEM_SUPPORT */
326
327 #ifdef CONFIG_VERSION_VARIABLE
328         {
329                 extern char version_string[];
330
331                 setenv ("ver", version_string);  /* set version variable */
332         }
333 #endif /* CONFIG_VERSION_VARIABLE */
334
335 #ifdef CFG_HUSH_PARSER
336         u_boot_hush_start ();
337 #endif
338
339 #ifdef CONFIG_AUTO_COMPLETE
340         install_auto_complete();
341 #endif
342
343 #ifdef CONFIG_PREBOOT
344         if ((p = getenv ("preboot")) != NULL) {
345 # ifdef CONFIG_AUTOBOOT_KEYED
346                 int prev = disable_ctrlc(1);    /* disable Control C checking */
347 # endif
348
349 # ifndef CFG_HUSH_PARSER
350                 run_command (p, 0);
351 # else
352                 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
353                                     FLAG_EXIT_FROM_LOOP);
354 # endif
355
356 # ifdef CONFIG_AUTOBOOT_KEYED
357                 disable_ctrlc(prev);    /* restore Control C checking */
358 # endif
359         }
360 #endif /* CONFIG_PREBOOT */
361
362 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
363         s = getenv ("bootdelay");
364         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
365
366         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
367
368 # ifdef CONFIG_BOOT_RETRY_TIME
369         init_cmd_timeout ();
370 # endif /* CONFIG_BOOT_RETRY_TIME */
371
372 #ifdef CONFIG_BOOTCOUNT_LIMIT
373         if (bootlimit && (bootcount > bootlimit)) {
374                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
375                         (unsigned)bootlimit);
376                 s = getenv ("altbootcmd");
377         }
378         else
379 #endif /* CONFIG_BOOTCOUNT_LIMIT */
380                 s = getenv ("bootcmd");
381
382         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
383
384         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
385 # ifdef CONFIG_AUTOBOOT_KEYED
386                 int prev = disable_ctrlc(1);    /* disable Control C checking */
387 # endif
388
389 # ifndef CFG_HUSH_PARSER
390                 run_command (s, 0);
391 # else
392                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
393                                     FLAG_EXIT_FROM_LOOP);
394 # endif
395
396 # ifdef CONFIG_AUTOBOOT_KEYED
397                 disable_ctrlc(prev);    /* restore Control C checking */
398 # endif
399         }
400
401 # ifdef CONFIG_MENUKEY
402         if (menukey == CONFIG_MENUKEY) {
403             s = getenv("menucmd");
404             if (s) {
405 # ifndef CFG_HUSH_PARSER
406                 run_command (s, 0);
407 # else
408                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
409                                     FLAG_EXIT_FROM_LOOP);
410 # endif
411             }
412         }
413 #endif /* CONFIG_MENUKEY */
414 #endif  /* CONFIG_BOOTDELAY */
415
416 #ifdef CONFIG_AMIGAONEG3SE
417         {
418             extern void video_banner(void);
419             video_banner();
420         }
421 #endif
422
423         /*
424          * Main Loop for Monitor Command Processing
425          */
426 #ifdef CFG_HUSH_PARSER
427         parse_file_outer();
428         /* This point is never reached */
429         for (;;);
430 #else
431         for (;;) {
432 #ifdef CONFIG_BOOT_RETRY_TIME
433                 if (rc >= 0) {
434                         /* Saw enough of a valid command to
435                          * restart the timeout.
436                          */
437                         reset_cmd_timeout();
438                 }
439 #endif
440                 len = readline (CFG_PROMPT);
441
442                 flag = 0;       /* assume no special flags for now */
443                 if (len > 0)
444                         strcpy (lastcommand, console_buffer);
445                 else if (len == 0)
446                         flag |= CMD_FLAG_REPEAT;
447 #ifdef CONFIG_BOOT_RETRY_TIME
448                 else if (len == -2) {
449                         /* -2 means timed out, retry autoboot
450                          */
451                         puts ("\nTimed out waiting for command\n");
452 # ifdef CONFIG_RESET_TO_RETRY
453                         /* Reinit board to run initialization code again */
454                         do_reset (NULL, 0, 0, NULL);
455 # else
456                         return;         /* retry autoboot */
457 # endif
458                 }
459 #endif
460
461                 if (len == -1)
462                         puts ("<INTERRUPT>\n");
463                 else
464                         rc = run_command (lastcommand, flag);
465
466                 if (rc <= 0) {
467                         /* invalid command or not repeatable, forget it */
468                         lastcommand[0] = 0;
469                 }
470         }
471 #endif /*CFG_HUSH_PARSER*/
472 }
473
474 #ifdef CONFIG_BOOT_RETRY_TIME
475 /***************************************************************************
476  * initialize command line timeout
477  */
478 void init_cmd_timeout(void)
479 {
480         char *s = getenv ("bootretry");
481
482         if (s != NULL)
483                 retry_time = (int)simple_strtol(s, NULL, 10);
484         else
485                 retry_time =  CONFIG_BOOT_RETRY_TIME;
486
487         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
488                 retry_time = CONFIG_BOOT_RETRY_MIN;
489 }
490
491 /***************************************************************************
492  * reset command line timeout to retry_time seconds
493  */
494 void reset_cmd_timeout(void)
495 {
496         endtime = endtick(retry_time);
497 }
498 #endif
499
500 #ifdef CONFIG_CMDLINE_EDITING
501
502 /*
503  * cmdline-editing related codes from vivi.
504  * Author: Janghoon Lyu <nandy@mizi.com>
505  */
506
507 #define putnstr(str,n)  do {                    \
508                 printf ("%.*s", n, str);        \
509         } while (0)
510
511 #define CTL_CH(c)               ((c) - 'a' + 1)
512
513 #define MAX_CMDBUF_SIZE         256
514
515 #define CTL_BACKSPACE           ('\b')
516 #define DEL                     ((char)255)
517 #define DEL7                    ((char)127)
518 #define CREAD_HIST_CHAR         ('!')
519
520 #define getcmd_putch(ch)        putc(ch)
521 #define getcmd_getch()          getc()
522 #define getcmd_cbeep()          getcmd_putch('\a')
523
524 #define HIST_MAX                20
525 #define HIST_SIZE               MAX_CMDBUF_SIZE
526
527 static int hist_max = 0;
528 static int hist_add_idx = 0;
529 static int hist_cur = -1;
530 unsigned hist_num = 0;
531
532 char* hist_list[HIST_MAX];
533 char hist_lines[HIST_MAX][HIST_SIZE];
534
535 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
536
537 static void hist_init(void)
538 {
539         int i;
540
541         hist_max = 0;
542         hist_add_idx = 0;
543         hist_cur = -1;
544         hist_num = 0;
545
546         for (i = 0; i < HIST_MAX; i++) {
547                 hist_list[i] = hist_lines[i];
548                 hist_list[i][0] = '\0';
549         }
550 }
551
552 static void cread_add_to_hist(char *line)
553 {
554         strcpy(hist_list[hist_add_idx], line);
555
556         if (++hist_add_idx >= HIST_MAX)
557                 hist_add_idx = 0;
558
559         if (hist_add_idx > hist_max)
560                 hist_max = hist_add_idx;
561
562         hist_num++;
563 }
564
565 static char* hist_prev(void)
566 {
567         char *ret;
568         int old_cur;
569
570         if (hist_cur < 0)
571                 return NULL;
572
573         old_cur = hist_cur;
574         if (--hist_cur < 0)
575                 hist_cur = hist_max;
576
577         if (hist_cur == hist_add_idx) {
578                 hist_cur = old_cur;
579                 ret = NULL;
580         } else
581                 ret = hist_list[hist_cur];
582
583         return (ret);
584 }
585
586 static char* hist_next(void)
587 {
588         char *ret;
589
590         if (hist_cur < 0)
591                 return NULL;
592
593         if (hist_cur == hist_add_idx)
594                 return NULL;
595
596         if (++hist_cur > hist_max)
597                 hist_cur = 0;
598
599         if (hist_cur == hist_add_idx) {
600                 ret = "";
601         } else
602                 ret = hist_list[hist_cur];
603
604         return (ret);
605 }
606
607 #ifndef CONFIG_CMDLINE_EDITING
608 static void cread_print_hist_list(void)
609 {
610         int i;
611         unsigned long n;
612
613         n = hist_num - hist_max;
614
615         i = hist_add_idx + 1;
616         while (1) {
617                 if (i > hist_max)
618                         i = 0;
619                 if (i == hist_add_idx)
620                         break;
621                 printf("%s\n", hist_list[i]);
622                 n++;
623                 i++;
624         }
625 }
626 #endif /* CONFIG_CMDLINE_EDITING */
627
628 #define BEGINNING_OF_LINE() {                   \
629         while (num) {                           \
630                 getcmd_putch(CTL_BACKSPACE);    \
631                 num--;                          \
632         }                                       \
633 }
634
635 #define ERASE_TO_EOL() {                                \
636         if (num < eol_num) {                            \
637                 int tmp;                                \
638                 for (tmp = num; tmp < eol_num; tmp++)   \
639                         getcmd_putch(' ');              \
640                 while (tmp-- > num)                     \
641                         getcmd_putch(CTL_BACKSPACE);    \
642                 eol_num = num;                          \
643         }                                               \
644 }
645
646 #define REFRESH_TO_EOL() {                      \
647         if (num < eol_num) {                    \
648                 wlen = eol_num - num;           \
649                 putnstr(buf + num, wlen);       \
650                 num = eol_num;                  \
651         }                                       \
652 }
653
654 static void cread_add_char(char ichar, int insert, unsigned long *num,
655                unsigned long *eol_num, char *buf, unsigned long len)
656 {
657         unsigned long wlen;
658
659         /* room ??? */
660         if (insert || *num == *eol_num) {
661                 if (*eol_num > len - 1) {
662                         getcmd_cbeep();
663                         return;
664                 }
665                 (*eol_num)++;
666         }
667
668         if (insert) {
669                 wlen = *eol_num - *num;
670                 if (wlen > 1) {
671                         memmove(&buf[*num+1], &buf[*num], wlen-1);
672                 }
673
674                 buf[*num] = ichar;
675                 putnstr(buf + *num, wlen);
676                 (*num)++;
677                 while (--wlen) {
678                         getcmd_putch(CTL_BACKSPACE);
679                 }
680         } else {
681                 /* echo the character */
682                 wlen = 1;
683                 buf[*num] = ichar;
684                 putnstr(buf + *num, wlen);
685                 (*num)++;
686         }
687 }
688
689 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
690               unsigned long *eol_num, char *buf, unsigned long len)
691 {
692         while (strsize--) {
693                 cread_add_char(*str, insert, num, eol_num, buf, len);
694                 str++;
695         }
696 }
697
698 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
699 {
700         unsigned long num = 0;
701         unsigned long eol_num = 0;
702         unsigned long rlen;
703         unsigned long wlen;
704         char ichar;
705         int insert = 1;
706         int esc_len = 0;
707         int rc = 0;
708         char esc_save[8];
709
710         while (1) {
711                 rlen = 1;
712                 ichar = getcmd_getch();
713
714                 if ((ichar == '\n') || (ichar == '\r')) {
715                         putc('\n');
716                         break;
717                 }
718
719                 /*
720                  * handle standard linux xterm esc sequences for arrow key, etc.
721                  */
722                 if (esc_len != 0) {
723                         if (esc_len == 1) {
724                                 if (ichar == '[') {
725                                         esc_save[esc_len] = ichar;
726                                         esc_len = 2;
727                                 } else {
728                                         cread_add_str(esc_save, esc_len, insert,
729                                                       &num, &eol_num, buf, *len);
730                                         esc_len = 0;
731                                 }
732                                 continue;
733                         }
734
735                         switch (ichar) {
736
737                         case 'D':       /* <- key */
738                                 ichar = CTL_CH('b');
739                                 esc_len = 0;
740                                 break;
741                         case 'C':       /* -> key */
742                                 ichar = CTL_CH('f');
743                                 esc_len = 0;
744                                 break;  /* pass off to ^F handler */
745                         case 'H':       /* Home key */
746                                 ichar = CTL_CH('a');
747                                 esc_len = 0;
748                                 break;  /* pass off to ^A handler */
749                         case 'A':       /* up arrow */
750                                 ichar = CTL_CH('p');
751                                 esc_len = 0;
752                                 break;  /* pass off to ^P handler */
753                         case 'B':       /* down arrow */
754                                 ichar = CTL_CH('n');
755                                 esc_len = 0;
756                                 break;  /* pass off to ^N handler */
757                         default:
758                                 esc_save[esc_len++] = ichar;
759                                 cread_add_str(esc_save, esc_len, insert,
760                                               &num, &eol_num, buf, *len);
761                                 esc_len = 0;
762                                 continue;
763                         }
764                 }
765
766                 switch (ichar) {
767                 case 0x1b:
768                         if (esc_len == 0) {
769                                 esc_save[esc_len] = ichar;
770                                 esc_len = 1;
771                         } else {
772                                 puts("impossible condition #876\n");
773                                 esc_len = 0;
774                         }
775                         break;
776
777                 case CTL_CH('a'):
778                         BEGINNING_OF_LINE();
779                         break;
780                 case CTL_CH('c'):       /* ^C - break */
781                         *buf = '\0';    /* discard input */
782                         return (-1);
783                 case CTL_CH('f'):
784                         if (num < eol_num) {
785                                 getcmd_putch(buf[num]);
786                                 num++;
787                         }
788                         break;
789                 case CTL_CH('b'):
790                         if (num) {
791                                 getcmd_putch(CTL_BACKSPACE);
792                                 num--;
793                         }
794                         break;
795                 case CTL_CH('d'):
796                         if (num < eol_num) {
797                                 wlen = eol_num - num - 1;
798                                 if (wlen) {
799                                         memmove(&buf[num], &buf[num+1], wlen);
800                                         putnstr(buf + num, wlen);
801                                 }
802
803                                 getcmd_putch(' ');
804                                 do {
805                                         getcmd_putch(CTL_BACKSPACE);
806                                 } while (wlen--);
807                                 eol_num--;
808                         }
809                         break;
810                 case CTL_CH('k'):
811                         ERASE_TO_EOL();
812                         break;
813                 case CTL_CH('e'):
814                         REFRESH_TO_EOL();
815                         break;
816                 case CTL_CH('o'):
817                         insert = !insert;
818                         break;
819                 case CTL_CH('x'):
820                 case CTL_CH('u'):
821                         BEGINNING_OF_LINE();
822                         ERASE_TO_EOL();
823                         break;
824                 case DEL:
825                 case DEL7:
826                 case 8:
827                         if (num) {
828                                 wlen = eol_num - num;
829                                 num--;
830                                 memmove(&buf[num], &buf[num+1], wlen);
831                                 getcmd_putch(CTL_BACKSPACE);
832                                 putnstr(buf + num, wlen);
833                                 getcmd_putch(' ');
834                                 do {
835                                         getcmd_putch(CTL_BACKSPACE);
836                                 } while (wlen--);
837                                 eol_num--;
838                         }
839                         break;
840                 case CTL_CH('p'):
841                 case CTL_CH('n'):
842                 {
843                         char * hline;
844
845                         esc_len = 0;
846
847                         if (ichar == CTL_CH('p'))
848                                 hline = hist_prev();
849                         else
850                                 hline = hist_next();
851
852                         if (!hline) {
853                                 getcmd_cbeep();
854                                 continue;
855                         }
856
857                         /* nuke the current line */
858                         /* first, go home */
859                         BEGINNING_OF_LINE();
860
861                         /* erase to end of line */
862                         ERASE_TO_EOL();
863
864                         /* copy new line into place and display */
865                         strcpy(buf, hline);
866                         eol_num = strlen(buf);
867                         REFRESH_TO_EOL();
868                         continue;
869                 }
870 #ifdef CONFIG_AUTO_COMPLETE
871                 case '\t': {
872                         int num2, col;
873
874                         /* do not autocomplete when in the middle */
875                         if (num < eol_num) {
876                                 getcmd_cbeep();
877                                 break;
878                         }
879
880                         buf[num] = '\0';
881                         col = strlen(prompt) + eol_num;
882                         num2 = num;
883                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
884                                 col = num2 - num;
885                                 num += col;
886                                 eol_num += col;
887                         }
888                         break;
889                 }
890 #endif
891                 default:
892                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
893                         break;
894                 }
895         }
896         *len = eol_num;
897         buf[eol_num] = '\0';    /* lose the newline */
898
899         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
900                 cread_add_to_hist(buf);
901         hist_cur = hist_add_idx;
902
903         return (rc);
904 }
905
906 #endif /* CONFIG_CMDLINE_EDITING */
907
908 /****************************************************************************/
909
910 /*
911  * Prompt for input and read a line.
912  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
913  * time out when time goes past endtime (timebase time in ticks).
914  * Return:      number of read characters
915  *              -1 if break
916  *              -2 if timed out
917  */
918 int readline (const char *const prompt)
919 {
920         return readline_into_buffer(prompt, console_buffer);
921 }
922
923
924 int readline_into_buffer (const char *const prompt, char * buffer)
925 {
926         char *p = buffer;
927 #ifdef CONFIG_CMDLINE_EDITING
928         unsigned int len=MAX_CMDBUF_SIZE;
929         int rc;
930         static int initted = 0;
931
932         if (!initted) {
933                 hist_init();
934                 initted = 1;
935         }
936
937         puts (prompt);
938
939         rc = cread_line(prompt, p, &len);
940         return rc < 0 ? rc : len;
941 #else
942         char * p_buf = p;
943         int     n = 0;                          /* buffer index         */
944         int     plen = 0;                       /* prompt length        */
945         int     col;                            /* output column cnt    */
946         char    c;
947
948         /* print prompt */
949         if (prompt) {
950                 plen = strlen (prompt);
951                 puts (prompt);
952         }
953         col = plen;
954
955         for (;;) {
956 #ifdef CONFIG_BOOT_RETRY_TIME
957                 while (!tstc()) {       /* while no incoming data */
958                         if (retry_time >= 0 && get_ticks() > endtime)
959                                 return (-2);    /* timed out */
960                 }
961 #endif
962                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
963
964 #ifdef CONFIG_SHOW_ACTIVITY
965                 while (!tstc()) {
966                         extern void show_activity(int arg);
967                         show_activity(0);
968                 }
969 #endif
970                 c = getc();
971
972                 /*
973                  * Special character handling
974                  */
975                 switch (c) {
976                 case '\r':                              /* Enter                */
977                 case '\n':
978                         *p = '\0';
979                         puts ("\r\n");
980                         return (p - p_buf);
981
982                 case '\0':                              /* nul                  */
983                         continue;
984
985                 case 0x03:                              /* ^C - break           */
986                         p_buf[0] = '\0';        /* discard input */
987                         return (-1);
988
989                 case 0x15:                              /* ^U - erase line      */
990                         while (col > plen) {
991                                 puts (erase_seq);
992                                 --col;
993                         }
994                         p = p_buf;
995                         n = 0;
996                         continue;
997
998                 case 0x17:                              /* ^W - erase word      */
999                         p=delete_char(p_buf, p, &col, &n, plen);
1000                         while ((n > 0) && (*p != ' ')) {
1001                                 p=delete_char(p_buf, p, &col, &n, plen);
1002                         }
1003                         continue;
1004
1005                 case 0x08:                              /* ^H  - backspace      */
1006                 case 0x7F:                              /* DEL - backspace      */
1007                         p=delete_char(p_buf, p, &col, &n, plen);
1008                         continue;
1009
1010                 default:
1011                         /*
1012                          * Must be a normal character then
1013                          */
1014                         if (n < CFG_CBSIZE-2) {
1015                                 if (c == '\t') {        /* expand TABs          */
1016 #ifdef CONFIG_AUTO_COMPLETE
1017                                         /* if auto completion triggered just continue */
1018                                         *p = '\0';
1019                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1020                                                 p = p_buf + n;  /* reset */
1021                                                 continue;
1022                                         }
1023 #endif
1024                                         puts (tab_seq+(col&07));
1025                                         col += 8 - (col&07);
1026                                 } else {
1027                                         ++col;          /* echo input           */
1028                                         putc (c);
1029                                 }
1030                                 *p++ = c;
1031                                 ++n;
1032                         } else {                        /* Buffer full          */
1033                                 putc ('\a');
1034                         }
1035                 }
1036         }
1037 #endif /* CONFIG_CMDLINE_EDITING */
1038 }
1039
1040 /****************************************************************************/
1041
1042 #ifndef CONFIG_CMDLINE_EDITING
1043 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1044 {
1045         char *s;
1046
1047         if (*np == 0) {
1048                 return (p);
1049         }
1050
1051         if (*(--p) == '\t') {                   /* will retype the whole line   */
1052                 while (*colp > plen) {
1053                         puts (erase_seq);
1054                         (*colp)--;
1055                 }
1056                 for (s=buffer; s<p; ++s) {
1057                         if (*s == '\t') {
1058                                 puts (tab_seq+((*colp) & 07));
1059                                 *colp += 8 - ((*colp) & 07);
1060                         } else {
1061                                 ++(*colp);
1062                                 putc (*s);
1063                         }
1064                 }
1065         } else {
1066                 puts (erase_seq);
1067                 (*colp)--;
1068         }
1069         (*np)--;
1070         return (p);
1071 }
1072 #endif /* CONFIG_CMDLINE_EDITING */
1073
1074 /****************************************************************************/
1075
1076 int parse_line (char *line, char *argv[])
1077 {
1078         int nargs = 0;
1079
1080 #ifdef DEBUG_PARSER
1081         printf ("parse_line: \"%s\"\n", line);
1082 #endif
1083         while (nargs < CFG_MAXARGS) {
1084
1085                 /* skip any white space */
1086                 while ((*line == ' ') || (*line == '\t')) {
1087                         ++line;
1088                 }
1089
1090                 if (*line == '\0') {    /* end of line, no more args    */
1091                         argv[nargs] = NULL;
1092 #ifdef DEBUG_PARSER
1093                 printf ("parse_line: nargs=%d\n", nargs);
1094 #endif
1095                         return (nargs);
1096                 }
1097
1098                 argv[nargs++] = line;   /* begin of argument string     */
1099
1100                 /* find end of string */
1101                 while (*line && (*line != ' ') && (*line != '\t')) {
1102                         ++line;
1103                 }
1104
1105                 if (*line == '\0') {    /* end of line, no more args    */
1106                         argv[nargs] = NULL;
1107 #ifdef DEBUG_PARSER
1108                 printf ("parse_line: nargs=%d\n", nargs);
1109 #endif
1110                         return (nargs);
1111                 }
1112
1113                 *line++ = '\0';         /* terminate current arg         */
1114         }
1115
1116         printf ("** Too many args (max. %d) **\n", CFG_MAXARGS);
1117
1118 #ifdef DEBUG_PARSER
1119         printf ("parse_line: nargs=%d\n", nargs);
1120 #endif
1121         return (nargs);
1122 }
1123
1124 /****************************************************************************/
1125
1126 static void process_macros (const char *input, char *output)
1127 {
1128         char c, prev;
1129         const char *varname_start = NULL;
1130         int inputcnt = strlen (input);
1131         int outputcnt = CFG_CBSIZE;
1132         int state = 0;          /* 0 = waiting for '$'  */
1133
1134         /* 1 = waiting for '(' or '{' */
1135         /* 2 = waiting for ')' or '}' */
1136         /* 3 = waiting for '''  */
1137 #ifdef DEBUG_PARSER
1138         char *output_start = output;
1139
1140         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1141                 input);
1142 #endif
1143
1144         prev = '\0';            /* previous character   */
1145
1146         while (inputcnt && outputcnt) {
1147                 c = *input++;
1148                 inputcnt--;
1149
1150                 if (state != 3) {
1151                         /* remove one level of escape characters */
1152                         if ((c == '\\') && (prev != '\\')) {
1153                                 if (inputcnt-- == 0)
1154                                         break;
1155                                 prev = c;
1156                                 c = *input++;
1157                         }
1158                 }
1159
1160                 switch (state) {
1161                 case 0: /* Waiting for (unescaped) $    */
1162                         if ((c == '\'') && (prev != '\\')) {
1163                                 state = 3;
1164                                 break;
1165                         }
1166                         if ((c == '$') && (prev != '\\')) {
1167                                 state++;
1168                         } else {
1169                                 *(output++) = c;
1170                                 outputcnt--;
1171                         }
1172                         break;
1173                 case 1: /* Waiting for (        */
1174                         if (c == '(' || c == '{') {
1175                                 state++;
1176                                 varname_start = input;
1177                         } else {
1178                                 state = 0;
1179                                 *(output++) = '$';
1180                                 outputcnt--;
1181
1182                                 if (outputcnt) {
1183                                         *(output++) = c;
1184                                         outputcnt--;
1185                                 }
1186                         }
1187                         break;
1188                 case 2: /* Waiting for )        */
1189                         if (c == ')' || c == '}') {
1190                                 int i;
1191                                 char envname[CFG_CBSIZE], *envval;
1192                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1193
1194                                 /* Get the varname */
1195                                 for (i = 0; i < envcnt; i++) {
1196                                         envname[i] = varname_start[i];
1197                                 }
1198                                 envname[i] = 0;
1199
1200                                 /* Get its value */
1201                                 envval = getenv (envname);
1202
1203                                 /* Copy into the line if it exists */
1204                                 if (envval != NULL)
1205                                         while ((*envval) && outputcnt) {
1206                                                 *(output++) = *(envval++);
1207                                                 outputcnt--;
1208                                         }
1209                                 /* Look for another '$' */
1210                                 state = 0;
1211                         }
1212                         break;
1213                 case 3: /* Waiting for '        */
1214                         if ((c == '\'') && (prev != '\\')) {
1215                                 state = 0;
1216                         } else {
1217                                 *(output++) = c;
1218                                 outputcnt--;
1219                         }
1220                         break;
1221                 }
1222                 prev = c;
1223         }
1224
1225         if (outputcnt)
1226                 *output = 0;
1227         else
1228                 *(output - 1) = 0;
1229
1230 #ifdef DEBUG_PARSER
1231         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1232                 strlen (output_start), output_start);
1233 #endif
1234 }
1235
1236 /****************************************************************************
1237  * returns:
1238  *      1  - command executed, repeatable
1239  *      0  - command executed but not repeatable, interrupted commands are
1240  *           always considered not repeatable
1241  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1242  *           (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is
1243  *           considered unrecognized)
1244  *
1245  * WARNING:
1246  *
1247  * We must create a temporary copy of the command since the command we get
1248  * may be the result from getenv(), which returns a pointer directly to
1249  * the environment data, which may change magicly when the command we run
1250  * creates or modifies environment variables (like "bootp" does).
1251  */
1252
1253 int run_command (const char *cmd, int flag)
1254 {
1255         cmd_tbl_t *cmdtp;
1256         char cmdbuf[CFG_CBSIZE];        /* working copy of cmd          */
1257         char *token;                    /* start of token in cmdbuf     */
1258         char *sep;                      /* end of token (separator) in cmdbuf */
1259         char finaltoken[CFG_CBSIZE];
1260         char *str = cmdbuf;
1261         char *argv[CFG_MAXARGS + 1];    /* NULL terminated      */
1262         int argc, inquotes;
1263         int repeatable = 1;
1264         int rc = 0;
1265
1266 #ifdef DEBUG_PARSER
1267         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1268         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1269         puts ("\"\n");
1270 #endif
1271
1272         clear_ctrlc();          /* forget any previous Control C */
1273
1274         if (!cmd || !*cmd) {
1275                 return -1;      /* empty command */
1276         }
1277
1278         if (strlen(cmd) >= CFG_CBSIZE) {
1279                 puts ("## Command too long!\n");
1280                 return -1;
1281         }
1282
1283         strcpy (cmdbuf, cmd);
1284
1285         /* Process separators and check for invalid
1286          * repeatable commands
1287          */
1288
1289 #ifdef DEBUG_PARSER
1290         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1291 #endif
1292         while (*str) {
1293
1294                 /*
1295                  * Find separator, or string end
1296                  * Allow simple escape of ';' by writing "\;"
1297                  */
1298                 for (inquotes = 0, sep = str; *sep; sep++) {
1299                         if ((*sep=='\'') &&
1300                             (*(sep-1) != '\\'))
1301                                 inquotes=!inquotes;
1302
1303                         if (!inquotes &&
1304                             (*sep == ';') &&    /* separator            */
1305                             ( sep != str) &&    /* past string start    */
1306                             (*(sep-1) != '\\')) /* and NOT escaped      */
1307                                 break;
1308                 }
1309
1310                 /*
1311                  * Limit the token to data between separators
1312                  */
1313                 token = str;
1314                 if (*sep) {
1315                         str = sep + 1;  /* start of command for next pass */
1316                         *sep = '\0';
1317                 }
1318                 else
1319                         str = sep;      /* no more commands for next pass */
1320 #ifdef DEBUG_PARSER
1321                 printf ("token: \"%s\"\n", token);
1322 #endif
1323
1324                 /* find macros in this token and replace them */
1325                 process_macros (token, finaltoken);
1326
1327                 /* Extract arguments */
1328                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1329                         rc = -1;        /* no command at all */
1330                         continue;
1331                 }
1332
1333                 /* Look up command in command table */
1334                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1335                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1336                         rc = -1;        /* give up after bad command */
1337                         continue;
1338                 }
1339
1340                 /* found - check max args */
1341                 if (argc > cmdtp->maxargs) {
1342                         printf ("Usage:\n%s\n", cmdtp->usage);
1343                         rc = -1;
1344                         continue;
1345                 }
1346
1347 #if defined(CONFIG_CMD_BOOTD)
1348                 /* avoid "bootd" recursion */
1349                 if (cmdtp->cmd == do_bootd) {
1350 #ifdef DEBUG_PARSER
1351                         printf ("[%s]\n", finaltoken);
1352 #endif
1353                         if (flag & CMD_FLAG_BOOTD) {
1354                                 puts ("'bootd' recursion detected\n");
1355                                 rc = -1;
1356                                 continue;
1357                         } else {
1358                                 flag |= CMD_FLAG_BOOTD;
1359                         }
1360                 }
1361 #endif
1362
1363                 /* OK - call function to do the command */
1364                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1365                         rc = -1;
1366                 }
1367
1368                 repeatable &= cmdtp->repeatable;
1369
1370                 /* Did the user stop this? */
1371                 if (had_ctrlc ())
1372                         return -1;      /* if stopped then not repeatable */
1373         }
1374
1375         return rc ? rc : repeatable;
1376 }
1377
1378 /****************************************************************************/
1379
1380 #if defined(CONFIG_CMD_RUN)
1381 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1382 {
1383         int i;
1384
1385         if (argc < 2) {
1386                 printf ("Usage:\n%s\n", cmdtp->usage);
1387                 return 1;
1388         }
1389
1390         for (i=1; i<argc; ++i) {
1391                 char *arg;
1392
1393                 if ((arg = getenv (argv[i])) == NULL) {
1394                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1395                         return 1;
1396                 }
1397 #ifndef CFG_HUSH_PARSER
1398                 if (run_command (arg, flag) == -1)
1399                         return 1;
1400 #else
1401                 if (parse_string_outer(arg,
1402                     FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1403                         return 1;
1404 #endif
1405         }
1406         return 0;
1407 }
1408 #endif