ColdFire: Cleanup lds files for multiple defined symbols
[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 #include <version.h>
34 #ifdef CONFIG_MODEM_SUPPORT
35 #include <malloc.h>             /* for free() prototype */
36 #endif
37
38 #ifdef CONFIG_SYS_HUSH_PARSER
39 #include <hush.h>
40 #endif
41
42 #include <post.h>
43 #include <linux/ctype.h>
44
45 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
46 DECLARE_GLOBAL_DATA_PTR;
47 #endif
48
49 /*
50  * Board-specific Platform code can reimplement show_boot_progress () if needed
51  */
52 void inline __show_boot_progress (int val) {}
53 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
54
55 #if defined(CONFIG_UPDATE_TFTP)
56 int update_tftp (ulong addr);
57 #endif /* CONFIG_UPDATE_TFTP */
58
59 #define MAX_DELAY_STOP_STR 32
60
61 #undef DEBUG_PARSER
62
63 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
64
65 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
66 static const char erase_seq[] = "\b \b";                /* erase sequence       */
67 static const char   tab_seq[] = "        ";             /* used to expand TABs  */
68
69 #ifdef CONFIG_BOOT_RETRY_TIME
70 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
71 static int      retry_time = -1; /* -1 so can call readline before main_loop */
72 #endif
73
74 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
75
76 #ifndef CONFIG_BOOT_RETRY_MIN
77 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
78 #endif
79
80 #ifdef CONFIG_MODEM_SUPPORT
81 int do_mdm_init = 0;
82 extern void mdm_init(void); /* defined in board.c */
83 #endif
84
85 /***************************************************************************
86  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
87  * returns: 0 -  no key string, allow autoboot 1 - got key string, abort
88  */
89 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
90 # if defined(CONFIG_AUTOBOOT_KEYED)
91 #ifndef CONFIG_MENU
92 static inline
93 #endif
94 int abortboot(int bootdelay)
95 {
96         int abort = 0;
97         uint64_t etime = endtick(bootdelay);
98         struct {
99                 char* str;
100                 u_int len;
101                 int retry;
102         }
103         delaykey [] = {
104                 { str: getenv ("bootdelaykey"),  retry: 1 },
105                 { str: getenv ("bootdelaykey2"), retry: 1 },
106                 { str: getenv ("bootstopkey"),   retry: 0 },
107                 { str: getenv ("bootstopkey2"),  retry: 0 },
108         };
109
110         char presskey [MAX_DELAY_STOP_STR];
111         u_int presskey_len = 0;
112         u_int presskey_max = 0;
113         u_int i;
114
115 #  ifdef CONFIG_AUTOBOOT_PROMPT
116         printf(CONFIG_AUTOBOOT_PROMPT);
117 #  endif
118
119 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
120         if (delaykey[0].str == NULL)
121                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
122 #  endif
123 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
124         if (delaykey[1].str == NULL)
125                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
126 #  endif
127 #  ifdef CONFIG_AUTOBOOT_STOP_STR
128         if (delaykey[2].str == NULL)
129                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
130 #  endif
131 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
132         if (delaykey[3].str == NULL)
133                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
134 #  endif
135
136         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
137                 delaykey[i].len = delaykey[i].str == NULL ?
138                                     0 : strlen (delaykey[i].str);
139                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
140                                     MAX_DELAY_STOP_STR : delaykey[i].len;
141
142                 presskey_max = presskey_max > delaykey[i].len ?
143                                     presskey_max : delaykey[i].len;
144
145 #  if DEBUG_BOOTKEYS
146                 printf("%s key:<%s>\n",
147                        delaykey[i].retry ? "delay" : "stop",
148                        delaykey[i].str ? delaykey[i].str : "NULL");
149 #  endif
150         }
151
152         /* In order to keep up with incoming data, check timeout only
153          * when catch up.
154          */
155         do {
156                 if (tstc()) {
157                         if (presskey_len < presskey_max) {
158                                 presskey [presskey_len ++] = getc();
159                         }
160                         else {
161                                 for (i = 0; i < presskey_max - 1; i ++)
162                                         presskey [i] = presskey [i + 1];
163
164                                 presskey [i] = getc();
165                         }
166                 }
167
168                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
169                         if (delaykey[i].len > 0 &&
170                             presskey_len >= delaykey[i].len &&
171                             memcmp (presskey + presskey_len - delaykey[i].len,
172                                     delaykey[i].str,
173                                     delaykey[i].len) == 0) {
174 #  if DEBUG_BOOTKEYS
175                                 printf("got %skey\n",
176                                        delaykey[i].retry ? "delay" : "stop");
177 #  endif
178
179 #  ifdef CONFIG_BOOT_RETRY_TIME
180                                 /* don't retry auto boot */
181                                 if (! delaykey[i].retry)
182                                         retry_time = -1;
183 #  endif
184                                 abort = 1;
185                         }
186                 }
187         } while (!abort && get_ticks() <= etime);
188
189 #  if DEBUG_BOOTKEYS
190         if (!abort)
191                 puts("key timeout\n");
192 #  endif
193
194 #ifdef CONFIG_SILENT_CONSOLE
195         if (abort)
196                 gd->flags &= ~GD_FLG_SILENT;
197 #endif
198
199         return abort;
200 }
201
202 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
203
204 #ifdef CONFIG_MENUKEY
205 static int menukey = 0;
206 #endif
207
208 #ifndef CONFIG_MENU
209 static inline
210 #endif
211 int abortboot(int bootdelay)
212 {
213         int abort = 0;
214
215 #ifdef CONFIG_MENUPROMPT
216         printf(CONFIG_MENUPROMPT);
217 #else
218         printf("Hit any key to stop autoboot: %2d ", bootdelay);
219 #endif
220
221 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
222         /*
223          * Check if key already pressed
224          * Don't check if bootdelay < 0
225          */
226         if (bootdelay >= 0) {
227                 if (tstc()) {   /* we got a key press   */
228                         (void) getc();  /* consume input        */
229                         puts ("\b\b\b 0");
230                         abort = 1;      /* don't auto boot      */
231                 }
232         }
233 #endif
234
235         while ((bootdelay > 0) && (!abort)) {
236                 int i;
237
238                 --bootdelay;
239                 /* delay 100 * 10ms */
240                 for (i=0; !abort && i<100; ++i) {
241                         if (tstc()) {   /* we got a key press   */
242                                 abort  = 1;     /* don't auto boot      */
243                                 bootdelay = 0;  /* no more delay        */
244 # ifdef CONFIG_MENUKEY
245                                 menukey = getc();
246 # else
247                                 (void) getc();  /* consume input        */
248 # endif
249                                 break;
250                         }
251                         udelay(10000);
252                 }
253
254                 printf("\b\b\b%2d ", bootdelay);
255         }
256
257         putc('\n');
258
259 #ifdef CONFIG_SILENT_CONSOLE
260         if (abort)
261                 gd->flags &= ~GD_FLG_SILENT;
262 #endif
263
264         return abort;
265 }
266 # endif /* CONFIG_AUTOBOOT_KEYED */
267 #endif  /* CONFIG_BOOTDELAY >= 0  */
268
269 /*
270  * Return 0 on success, or != 0 on error.
271  */
272 #ifndef CONFIG_CMD_PXE
273 static inline
274 #endif
275 int run_command2(const char *cmd, int flag)
276 {
277 #ifndef CONFIG_SYS_HUSH_PARSER
278         /*
279          * run_command can return 0 or 1 for success, so clean up its result.
280          */
281         if (run_command(cmd, flag) == -1)
282                 return 1;
283
284         return 0;
285 #else
286         return parse_string_outer(cmd,
287                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
288 #endif
289 }
290
291 /****************************************************************************/
292
293 void main_loop (void)
294 {
295 #ifndef CONFIG_SYS_HUSH_PARSER
296         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
297         int len;
298         int rc = 1;
299         int flag;
300 #endif
301
302 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
303         char *s;
304         int bootdelay;
305 #endif
306 #ifdef CONFIG_PREBOOT
307         char *p;
308 #endif
309 #ifdef CONFIG_BOOTCOUNT_LIMIT
310         unsigned long bootcount = 0;
311         unsigned long bootlimit = 0;
312         char *bcs;
313         char bcs_set[16];
314 #endif /* CONFIG_BOOTCOUNT_LIMIT */
315
316 #ifdef CONFIG_BOOTCOUNT_LIMIT
317         bootcount = bootcount_load();
318         bootcount++;
319         bootcount_store (bootcount);
320         sprintf (bcs_set, "%lu", bootcount);
321         setenv ("bootcount", bcs_set);
322         bcs = getenv ("bootlimit");
323         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
324 #endif /* CONFIG_BOOTCOUNT_LIMIT */
325
326 #ifdef CONFIG_MODEM_SUPPORT
327         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
328         if (do_mdm_init) {
329                 char *str = strdup(getenv("mdm_cmd"));
330                 setenv ("preboot", str);  /* set or delete definition */
331                 if (str != NULL)
332                         free (str);
333                 mdm_init(); /* wait for modem connection */
334         }
335 #endif  /* CONFIG_MODEM_SUPPORT */
336
337 #ifdef CONFIG_VERSION_VARIABLE
338         {
339                 setenv ("ver", version_string);  /* set version variable */
340         }
341 #endif /* CONFIG_VERSION_VARIABLE */
342
343 #ifdef CONFIG_SYS_HUSH_PARSER
344         u_boot_hush_start ();
345 #endif
346
347 #if defined(CONFIG_HUSH_INIT_VAR)
348         hush_init_var ();
349 #endif
350
351 #ifdef CONFIG_PREBOOT
352         if ((p = getenv ("preboot")) != NULL) {
353 # ifdef CONFIG_AUTOBOOT_KEYED
354                 int prev = disable_ctrlc(1);    /* disable Control C checking */
355 # endif
356
357                 run_command2(p, 0);
358
359 # ifdef CONFIG_AUTOBOOT_KEYED
360                 disable_ctrlc(prev);    /* restore Control C checking */
361 # endif
362         }
363 #endif /* CONFIG_PREBOOT */
364
365 #if defined(CONFIG_UPDATE_TFTP)
366         update_tftp (0UL);
367 #endif /* CONFIG_UPDATE_TFTP */
368
369 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
370         s = getenv ("bootdelay");
371         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
372
373         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
374
375 # ifdef CONFIG_BOOT_RETRY_TIME
376         init_cmd_timeout ();
377 # endif /* CONFIG_BOOT_RETRY_TIME */
378
379 #ifdef CONFIG_POST
380         if (gd->flags & GD_FLG_POSTFAIL) {
381                 s = getenv("failbootcmd");
382         }
383         else
384 #endif /* CONFIG_POST */
385 #ifdef CONFIG_BOOTCOUNT_LIMIT
386         if (bootlimit && (bootcount > bootlimit)) {
387                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
388                         (unsigned)bootlimit);
389                 s = getenv ("altbootcmd");
390         }
391         else
392 #endif /* CONFIG_BOOTCOUNT_LIMIT */
393                 s = getenv ("bootcmd");
394
395         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
396
397         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
398 # ifdef CONFIG_AUTOBOOT_KEYED
399                 int prev = disable_ctrlc(1);    /* disable Control C checking */
400 # endif
401
402                 run_command2(s, 0);
403
404 # ifdef CONFIG_AUTOBOOT_KEYED
405                 disable_ctrlc(prev);    /* restore Control C checking */
406 # endif
407         }
408
409 # ifdef CONFIG_MENUKEY
410         if (menukey == CONFIG_MENUKEY) {
411                 s = getenv("menucmd");
412                 if (s)
413                         run_command2(s, 0);
414         }
415 #endif /* CONFIG_MENUKEY */
416 #endif /* CONFIG_BOOTDELAY */
417
418         /*
419          * Main Loop for Monitor Command Processing
420          */
421 #ifdef CONFIG_SYS_HUSH_PARSER
422         parse_file_outer();
423         /* This point is never reached */
424         for (;;);
425 #else
426         for (;;) {
427 #ifdef CONFIG_BOOT_RETRY_TIME
428                 if (rc >= 0) {
429                         /* Saw enough of a valid command to
430                          * restart the timeout.
431                          */
432                         reset_cmd_timeout();
433                 }
434 #endif
435                 len = readline (CONFIG_SYS_PROMPT);
436
437                 flag = 0;       /* assume no special flags for now */
438                 if (len > 0)
439                         strcpy (lastcommand, console_buffer);
440                 else if (len == 0)
441                         flag |= CMD_FLAG_REPEAT;
442 #ifdef CONFIG_BOOT_RETRY_TIME
443                 else if (len == -2) {
444                         /* -2 means timed out, retry autoboot
445                          */
446                         puts ("\nTimed out waiting for command\n");
447 # ifdef CONFIG_RESET_TO_RETRY
448                         /* Reinit board to run initialization code again */
449                         do_reset (NULL, 0, 0, NULL);
450 # else
451                         return;         /* retry autoboot */
452 # endif
453                 }
454 #endif
455
456                 if (len == -1)
457                         puts ("<INTERRUPT>\n");
458                 else
459                         rc = run_command (lastcommand, flag);
460
461                 if (rc <= 0) {
462                         /* invalid command or not repeatable, forget it */
463                         lastcommand[0] = 0;
464                 }
465         }
466 #endif /*CONFIG_SYS_HUSH_PARSER*/
467 }
468
469 #ifdef CONFIG_BOOT_RETRY_TIME
470 /***************************************************************************
471  * initialize command line timeout
472  */
473 void init_cmd_timeout(void)
474 {
475         char *s = getenv ("bootretry");
476
477         if (s != NULL)
478                 retry_time = (int)simple_strtol(s, NULL, 10);
479         else
480                 retry_time =  CONFIG_BOOT_RETRY_TIME;
481
482         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
483                 retry_time = CONFIG_BOOT_RETRY_MIN;
484 }
485
486 /***************************************************************************
487  * reset command line timeout to retry_time seconds
488  */
489 void reset_cmd_timeout(void)
490 {
491         endtime = endtick(retry_time);
492 }
493 #endif
494
495 #ifdef CONFIG_CMDLINE_EDITING
496
497 /*
498  * cmdline-editing related codes from vivi.
499  * Author: Janghoon Lyu <nandy@mizi.com>
500  */
501
502 #define putnstr(str,n)  do {                    \
503                 printf ("%.*s", (int)n, str);   \
504         } while (0)
505
506 #define CTL_CH(c)               ((c) - 'a' + 1)
507 #define CTL_BACKSPACE           ('\b')
508 #define DEL                     ((char)255)
509 #define DEL7                    ((char)127)
510 #define CREAD_HIST_CHAR         ('!')
511
512 #define getcmd_putch(ch)        putc(ch)
513 #define getcmd_getch()          getc()
514 #define getcmd_cbeep()          getcmd_putch('\a')
515
516 #define HIST_MAX                20
517 #define HIST_SIZE               CONFIG_SYS_CBSIZE
518
519 static int hist_max = 0;
520 static int hist_add_idx = 0;
521 static int hist_cur = -1;
522 unsigned hist_num = 0;
523
524 char* hist_list[HIST_MAX];
525 char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
526
527 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
528
529 static void hist_init(void)
530 {
531         int i;
532
533         hist_max = 0;
534         hist_add_idx = 0;
535         hist_cur = -1;
536         hist_num = 0;
537
538         for (i = 0; i < HIST_MAX; i++) {
539                 hist_list[i] = hist_lines[i];
540                 hist_list[i][0] = '\0';
541         }
542 }
543
544 static void cread_add_to_hist(char *line)
545 {
546         strcpy(hist_list[hist_add_idx], line);
547
548         if (++hist_add_idx >= HIST_MAX)
549                 hist_add_idx = 0;
550
551         if (hist_add_idx > hist_max)
552                 hist_max = hist_add_idx;
553
554         hist_num++;
555 }
556
557 static char* hist_prev(void)
558 {
559         char *ret;
560         int old_cur;
561
562         if (hist_cur < 0)
563                 return NULL;
564
565         old_cur = hist_cur;
566         if (--hist_cur < 0)
567                 hist_cur = hist_max;
568
569         if (hist_cur == hist_add_idx) {
570                 hist_cur = old_cur;
571                 ret = NULL;
572         } else
573                 ret = hist_list[hist_cur];
574
575         return (ret);
576 }
577
578 static char* hist_next(void)
579 {
580         char *ret;
581
582         if (hist_cur < 0)
583                 return NULL;
584
585         if (hist_cur == hist_add_idx)
586                 return NULL;
587
588         if (++hist_cur > hist_max)
589                 hist_cur = 0;
590
591         if (hist_cur == hist_add_idx) {
592                 ret = "";
593         } else
594                 ret = hist_list[hist_cur];
595
596         return (ret);
597 }
598
599 #ifndef CONFIG_CMDLINE_EDITING
600 static void cread_print_hist_list(void)
601 {
602         int i;
603         unsigned long n;
604
605         n = hist_num - hist_max;
606
607         i = hist_add_idx + 1;
608         while (1) {
609                 if (i > hist_max)
610                         i = 0;
611                 if (i == hist_add_idx)
612                         break;
613                 printf("%s\n", hist_list[i]);
614                 n++;
615                 i++;
616         }
617 }
618 #endif /* CONFIG_CMDLINE_EDITING */
619
620 #define BEGINNING_OF_LINE() {                   \
621         while (num) {                           \
622                 getcmd_putch(CTL_BACKSPACE);    \
623                 num--;                          \
624         }                                       \
625 }
626
627 #define ERASE_TO_EOL() {                                \
628         if (num < eol_num) {                            \
629                 printf("%*s", (int)(eol_num - num), ""); \
630                 do {                                    \
631                         getcmd_putch(CTL_BACKSPACE);    \
632                 } while (--eol_num > num);              \
633         }                                               \
634 }
635
636 #define REFRESH_TO_EOL() {                      \
637         if (num < eol_num) {                    \
638                 wlen = eol_num - num;           \
639                 putnstr(buf + num, wlen);       \
640                 num = eol_num;                  \
641         }                                       \
642 }
643
644 static void cread_add_char(char ichar, int insert, unsigned long *num,
645                unsigned long *eol_num, char *buf, unsigned long len)
646 {
647         unsigned long wlen;
648
649         /* room ??? */
650         if (insert || *num == *eol_num) {
651                 if (*eol_num > len - 1) {
652                         getcmd_cbeep();
653                         return;
654                 }
655                 (*eol_num)++;
656         }
657
658         if (insert) {
659                 wlen = *eol_num - *num;
660                 if (wlen > 1) {
661                         memmove(&buf[*num+1], &buf[*num], wlen-1);
662                 }
663
664                 buf[*num] = ichar;
665                 putnstr(buf + *num, wlen);
666                 (*num)++;
667                 while (--wlen) {
668                         getcmd_putch(CTL_BACKSPACE);
669                 }
670         } else {
671                 /* echo the character */
672                 wlen = 1;
673                 buf[*num] = ichar;
674                 putnstr(buf + *num, wlen);
675                 (*num)++;
676         }
677 }
678
679 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
680               unsigned long *eol_num, char *buf, unsigned long len)
681 {
682         while (strsize--) {
683                 cread_add_char(*str, insert, num, eol_num, buf, len);
684                 str++;
685         }
686 }
687
688 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
689 {
690         unsigned long num = 0;
691         unsigned long eol_num = 0;
692         unsigned long wlen;
693         char ichar;
694         int insert = 1;
695         int esc_len = 0;
696         char esc_save[8];
697         int init_len = strlen(buf);
698
699         if (init_len)
700                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
701
702         while (1) {
703 #ifdef CONFIG_BOOT_RETRY_TIME
704                 while (!tstc()) {       /* while no incoming data */
705                         if (retry_time >= 0 && get_ticks() > endtime)
706                                 return (-2);    /* timed out */
707                         WATCHDOG_RESET();
708                 }
709 #endif
710
711                 ichar = getcmd_getch();
712
713                 if ((ichar == '\n') || (ichar == '\r')) {
714                         putc('\n');
715                         break;
716                 }
717
718                 /*
719                  * handle standard linux xterm esc sequences for arrow key, etc.
720                  */
721                 if (esc_len != 0) {
722                         if (esc_len == 1) {
723                                 if (ichar == '[') {
724                                         esc_save[esc_len] = ichar;
725                                         esc_len = 2;
726                                 } else {
727                                         cread_add_str(esc_save, esc_len, insert,
728                                                       &num, &eol_num, buf, *len);
729                                         esc_len = 0;
730                                 }
731                                 continue;
732                         }
733
734                         switch (ichar) {
735
736                         case 'D':       /* <- key */
737                                 ichar = CTL_CH('b');
738                                 esc_len = 0;
739                                 break;
740                         case 'C':       /* -> key */
741                                 ichar = CTL_CH('f');
742                                 esc_len = 0;
743                                 break;  /* pass off to ^F handler */
744                         case 'H':       /* Home key */
745                                 ichar = CTL_CH('a');
746                                 esc_len = 0;
747                                 break;  /* pass off to ^A handler */
748                         case 'A':       /* up arrow */
749                                 ichar = CTL_CH('p');
750                                 esc_len = 0;
751                                 break;  /* pass off to ^P handler */
752                         case 'B':       /* down arrow */
753                                 ichar = CTL_CH('n');
754                                 esc_len = 0;
755                                 break;  /* pass off to ^N handler */
756                         default:
757                                 esc_save[esc_len++] = ichar;
758                                 cread_add_str(esc_save, esc_len, insert,
759                                               &num, &eol_num, buf, *len);
760                                 esc_len = 0;
761                                 continue;
762                         }
763                 }
764
765                 switch (ichar) {
766                 case 0x1b:
767                         if (esc_len == 0) {
768                                 esc_save[esc_len] = ichar;
769                                 esc_len = 1;
770                         } else {
771                                 puts("impossible condition #876\n");
772                                 esc_len = 0;
773                         }
774                         break;
775
776                 case CTL_CH('a'):
777                         BEGINNING_OF_LINE();
778                         break;
779                 case CTL_CH('c'):       /* ^C - break */
780                         *buf = '\0';    /* discard input */
781                         return (-1);
782                 case CTL_CH('f'):
783                         if (num < eol_num) {
784                                 getcmd_putch(buf[num]);
785                                 num++;
786                         }
787                         break;
788                 case CTL_CH('b'):
789                         if (num) {
790                                 getcmd_putch(CTL_BACKSPACE);
791                                 num--;
792                         }
793                         break;
794                 case CTL_CH('d'):
795                         if (num < eol_num) {
796                                 wlen = eol_num - num - 1;
797                                 if (wlen) {
798                                         memmove(&buf[num], &buf[num+1], wlen);
799                                         putnstr(buf + num, wlen);
800                                 }
801
802                                 getcmd_putch(' ');
803                                 do {
804                                         getcmd_putch(CTL_BACKSPACE);
805                                 } while (wlen--);
806                                 eol_num--;
807                         }
808                         break;
809                 case CTL_CH('k'):
810                         ERASE_TO_EOL();
811                         break;
812                 case CTL_CH('e'):
813                         REFRESH_TO_EOL();
814                         break;
815                 case CTL_CH('o'):
816                         insert = !insert;
817                         break;
818                 case CTL_CH('x'):
819                 case CTL_CH('u'):
820                         BEGINNING_OF_LINE();
821                         ERASE_TO_EOL();
822                         break;
823                 case DEL:
824                 case DEL7:
825                 case 8:
826                         if (num) {
827                                 wlen = eol_num - num;
828                                 num--;
829                                 memmove(&buf[num], &buf[num+1], wlen);
830                                 getcmd_putch(CTL_BACKSPACE);
831                                 putnstr(buf + num, wlen);
832                                 getcmd_putch(' ');
833                                 do {
834                                         getcmd_putch(CTL_BACKSPACE);
835                                 } while (wlen--);
836                                 eol_num--;
837                         }
838                         break;
839                 case CTL_CH('p'):
840                 case CTL_CH('n'):
841                 {
842                         char * hline;
843
844                         esc_len = 0;
845
846                         if (ichar == CTL_CH('p'))
847                                 hline = hist_prev();
848                         else
849                                 hline = hist_next();
850
851                         if (!hline) {
852                                 getcmd_cbeep();
853                                 continue;
854                         }
855
856                         /* nuke the current line */
857                         /* first, go home */
858                         BEGINNING_OF_LINE();
859
860                         /* erase to end of line */
861                         ERASE_TO_EOL();
862
863                         /* copy new line into place and display */
864                         strcpy(buf, hline);
865                         eol_num = strlen(buf);
866                         REFRESH_TO_EOL();
867                         continue;
868                 }
869 #ifdef CONFIG_AUTO_COMPLETE
870                 case '\t': {
871                         int num2, col;
872
873                         /* do not autocomplete when in the middle */
874                         if (num < eol_num) {
875                                 getcmd_cbeep();
876                                 break;
877                         }
878
879                         buf[num] = '\0';
880                         col = strlen(prompt) + eol_num;
881                         num2 = num;
882                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
883                                 col = num2 - num;
884                                 num += col;
885                                 eol_num += col;
886                         }
887                         break;
888                 }
889 #endif
890                 default:
891                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
892                         break;
893                 }
894         }
895         *len = eol_num;
896         buf[eol_num] = '\0';    /* lose the newline */
897
898         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
899                 cread_add_to_hist(buf);
900         hist_cur = hist_add_idx;
901
902         return 0;
903 }
904
905 #endif /* CONFIG_CMDLINE_EDITING */
906
907 /****************************************************************************/
908
909 /*
910  * Prompt for input and read a line.
911  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
912  * time out when time goes past endtime (timebase time in ticks).
913  * Return:      number of read characters
914  *              -1 if break
915  *              -2 if timed out
916  */
917 int readline (const char *const prompt)
918 {
919         /*
920          * If console_buffer isn't 0-length the user will be prompted to modify
921          * it instead of entering it from scratch as desired.
922          */
923         console_buffer[0] = '\0';
924
925         return readline_into_buffer(prompt, console_buffer);
926 }
927
928
929 int readline_into_buffer (const char *const prompt, char * buffer)
930 {
931         char *p = buffer;
932 #ifdef CONFIG_CMDLINE_EDITING
933         unsigned int len = CONFIG_SYS_CBSIZE;
934         int rc;
935         static int initted = 0;
936
937         /*
938          * History uses a global array which is not
939          * writable until after relocation to RAM.
940          * Revert to non-history version if still
941          * running from flash.
942          */
943         if (gd->flags & GD_FLG_RELOC) {
944                 if (!initted) {
945                         hist_init();
946                         initted = 1;
947                 }
948
949                 if (prompt)
950                         puts (prompt);
951
952                 rc = cread_line(prompt, p, &len);
953                 return rc < 0 ? rc : len;
954
955         } else {
956 #endif  /* CONFIG_CMDLINE_EDITING */
957         char * p_buf = p;
958         int     n = 0;                          /* buffer index         */
959         int     plen = 0;                       /* prompt length        */
960         int     col;                            /* output column cnt    */
961         char    c;
962
963         /* print prompt */
964         if (prompt) {
965                 plen = strlen (prompt);
966                 puts (prompt);
967         }
968         col = plen;
969
970         for (;;) {
971 #ifdef CONFIG_BOOT_RETRY_TIME
972                 while (!tstc()) {       /* while no incoming data */
973                         if (retry_time >= 0 && get_ticks() > endtime)
974                                 return (-2);    /* timed out */
975                         WATCHDOG_RESET();
976                 }
977 #endif
978                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
979
980 #ifdef CONFIG_SHOW_ACTIVITY
981                 while (!tstc()) {
982                         extern void show_activity(int arg);
983                         show_activity(0);
984                         WATCHDOG_RESET();
985                 }
986 #endif
987                 c = getc();
988
989                 /*
990                  * Special character handling
991                  */
992                 switch (c) {
993                 case '\r':                              /* Enter                */
994                 case '\n':
995                         *p = '\0';
996                         puts ("\r\n");
997                         return (p - p_buf);
998
999                 case '\0':                              /* nul                  */
1000                         continue;
1001
1002                 case 0x03:                              /* ^C - break           */
1003                         p_buf[0] = '\0';        /* discard input */
1004                         return (-1);
1005
1006                 case 0x15:                              /* ^U - erase line      */
1007                         while (col > plen) {
1008                                 puts (erase_seq);
1009                                 --col;
1010                         }
1011                         p = p_buf;
1012                         n = 0;
1013                         continue;
1014
1015                 case 0x17:                              /* ^W - erase word      */
1016                         p=delete_char(p_buf, p, &col, &n, plen);
1017                         while ((n > 0) && (*p != ' ')) {
1018                                 p=delete_char(p_buf, p, &col, &n, plen);
1019                         }
1020                         continue;
1021
1022                 case 0x08:                              /* ^H  - backspace      */
1023                 case 0x7F:                              /* DEL - backspace      */
1024                         p=delete_char(p_buf, p, &col, &n, plen);
1025                         continue;
1026
1027                 default:
1028                         /*
1029                          * Must be a normal character then
1030                          */
1031                         if (n < CONFIG_SYS_CBSIZE-2) {
1032                                 if (c == '\t') {        /* expand TABs          */
1033 #ifdef CONFIG_AUTO_COMPLETE
1034                                         /* if auto completion triggered just continue */
1035                                         *p = '\0';
1036                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1037                                                 p = p_buf + n;  /* reset */
1038                                                 continue;
1039                                         }
1040 #endif
1041                                         puts (tab_seq+(col&07));
1042                                         col += 8 - (col&07);
1043                                 } else {
1044                                         ++col;          /* echo input           */
1045                                         putc (c);
1046                                 }
1047                                 *p++ = c;
1048                                 ++n;
1049                         } else {                        /* Buffer full          */
1050                                 putc ('\a');
1051                         }
1052                 }
1053         }
1054 #ifdef CONFIG_CMDLINE_EDITING
1055         }
1056 #endif
1057 }
1058
1059 /****************************************************************************/
1060
1061 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1062 {
1063         char *s;
1064
1065         if (*np == 0) {
1066                 return (p);
1067         }
1068
1069         if (*(--p) == '\t') {                   /* will retype the whole line   */
1070                 while (*colp > plen) {
1071                         puts (erase_seq);
1072                         (*colp)--;
1073                 }
1074                 for (s=buffer; s<p; ++s) {
1075                         if (*s == '\t') {
1076                                 puts (tab_seq+((*colp) & 07));
1077                                 *colp += 8 - ((*colp) & 07);
1078                         } else {
1079                                 ++(*colp);
1080                                 putc (*s);
1081                         }
1082                 }
1083         } else {
1084                 puts (erase_seq);
1085                 (*colp)--;
1086         }
1087         (*np)--;
1088         return (p);
1089 }
1090
1091 /****************************************************************************/
1092
1093 int parse_line (char *line, char *argv[])
1094 {
1095         int nargs = 0;
1096
1097 #ifdef DEBUG_PARSER
1098         printf ("parse_line: \"%s\"\n", line);
1099 #endif
1100         while (nargs < CONFIG_SYS_MAXARGS) {
1101
1102                 /* skip any white space */
1103                 while (isblank(*line))
1104                         ++line;
1105
1106                 if (*line == '\0') {    /* end of line, no more args    */
1107                         argv[nargs] = NULL;
1108 #ifdef DEBUG_PARSER
1109                 printf ("parse_line: nargs=%d\n", nargs);
1110 #endif
1111                         return (nargs);
1112                 }
1113
1114                 argv[nargs++] = line;   /* begin of argument string     */
1115
1116                 /* find end of string */
1117                 while (*line && !isblank(*line))
1118                         ++line;
1119
1120                 if (*line == '\0') {    /* end of line, no more args    */
1121                         argv[nargs] = NULL;
1122 #ifdef DEBUG_PARSER
1123                 printf ("parse_line: nargs=%d\n", nargs);
1124 #endif
1125                         return (nargs);
1126                 }
1127
1128                 *line++ = '\0';         /* terminate current arg         */
1129         }
1130
1131         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1132
1133 #ifdef DEBUG_PARSER
1134         printf ("parse_line: nargs=%d\n", nargs);
1135 #endif
1136         return (nargs);
1137 }
1138
1139 /****************************************************************************/
1140
1141 static void process_macros (const char *input, char *output)
1142 {
1143         char c, prev;
1144         const char *varname_start = NULL;
1145         int inputcnt = strlen (input);
1146         int outputcnt = CONFIG_SYS_CBSIZE;
1147         int state = 0;          /* 0 = waiting for '$'  */
1148
1149         /* 1 = waiting for '(' or '{' */
1150         /* 2 = waiting for ')' or '}' */
1151         /* 3 = waiting for '''  */
1152 #ifdef DEBUG_PARSER
1153         char *output_start = output;
1154
1155         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1156                 input);
1157 #endif
1158
1159         prev = '\0';            /* previous character   */
1160
1161         while (inputcnt && outputcnt) {
1162                 c = *input++;
1163                 inputcnt--;
1164
1165                 if (state != 3) {
1166                         /* remove one level of escape characters */
1167                         if ((c == '\\') && (prev != '\\')) {
1168                                 if (inputcnt-- == 0)
1169                                         break;
1170                                 prev = c;
1171                                 c = *input++;
1172                         }
1173                 }
1174
1175                 switch (state) {
1176                 case 0: /* Waiting for (unescaped) $    */
1177                         if ((c == '\'') && (prev != '\\')) {
1178                                 state = 3;
1179                                 break;
1180                         }
1181                         if ((c == '$') && (prev != '\\')) {
1182                                 state++;
1183                         } else {
1184                                 *(output++) = c;
1185                                 outputcnt--;
1186                         }
1187                         break;
1188                 case 1: /* Waiting for (        */
1189                         if (c == '(' || c == '{') {
1190                                 state++;
1191                                 varname_start = input;
1192                         } else {
1193                                 state = 0;
1194                                 *(output++) = '$';
1195                                 outputcnt--;
1196
1197                                 if (outputcnt) {
1198                                         *(output++) = c;
1199                                         outputcnt--;
1200                                 }
1201                         }
1202                         break;
1203                 case 2: /* Waiting for )        */
1204                         if (c == ')' || c == '}') {
1205                                 int i;
1206                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1207                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1208
1209                                 /* Get the varname */
1210                                 for (i = 0; i < envcnt; i++) {
1211                                         envname[i] = varname_start[i];
1212                                 }
1213                                 envname[i] = 0;
1214
1215                                 /* Get its value */
1216                                 envval = getenv (envname);
1217
1218                                 /* Copy into the line if it exists */
1219                                 if (envval != NULL)
1220                                         while ((*envval) && outputcnt) {
1221                                                 *(output++) = *(envval++);
1222                                                 outputcnt--;
1223                                         }
1224                                 /* Look for another '$' */
1225                                 state = 0;
1226                         }
1227                         break;
1228                 case 3: /* Waiting for '        */
1229                         if ((c == '\'') && (prev != '\\')) {
1230                                 state = 0;
1231                         } else {
1232                                 *(output++) = c;
1233                                 outputcnt--;
1234                         }
1235                         break;
1236                 }
1237                 prev = c;
1238         }
1239
1240         if (outputcnt)
1241                 *output = 0;
1242         else
1243                 *(output - 1) = 0;
1244
1245 #ifdef DEBUG_PARSER
1246         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1247                 strlen (output_start), output_start);
1248 #endif
1249 }
1250
1251 /****************************************************************************
1252  * returns:
1253  *      1  - command executed, repeatable
1254  *      0  - command executed but not repeatable, interrupted commands are
1255  *           always considered not repeatable
1256  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1257  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1258  *           considered unrecognized)
1259  *
1260  * WARNING:
1261  *
1262  * We must create a temporary copy of the command since the command we get
1263  * may be the result from getenv(), which returns a pointer directly to
1264  * the environment data, which may change magicly when the command we run
1265  * creates or modifies environment variables (like "bootp" does).
1266  */
1267
1268 int run_command (const char *cmd, int flag)
1269 {
1270         cmd_tbl_t *cmdtp;
1271         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1272         char *token;                    /* start of token in cmdbuf     */
1273         char *sep;                      /* end of token (separator) in cmdbuf */
1274         char finaltoken[CONFIG_SYS_CBSIZE];
1275         char *str = cmdbuf;
1276         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1277         int argc, inquotes;
1278         int repeatable = 1;
1279         int rc = 0;
1280
1281 #ifdef DEBUG_PARSER
1282         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1283         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1284         puts ("\"\n");
1285 #endif
1286
1287         clear_ctrlc();          /* forget any previous Control C */
1288
1289         if (!cmd || !*cmd) {
1290                 return -1;      /* empty command */
1291         }
1292
1293         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1294                 puts ("## Command too long!\n");
1295                 return -1;
1296         }
1297
1298         strcpy (cmdbuf, cmd);
1299
1300         /* Process separators and check for invalid
1301          * repeatable commands
1302          */
1303
1304 #ifdef DEBUG_PARSER
1305         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1306 #endif
1307         while (*str) {
1308
1309                 /*
1310                  * Find separator, or string end
1311                  * Allow simple escape of ';' by writing "\;"
1312                  */
1313                 for (inquotes = 0, sep = str; *sep; sep++) {
1314                         if ((*sep=='\'') &&
1315                             (*(sep-1) != '\\'))
1316                                 inquotes=!inquotes;
1317
1318                         if (!inquotes &&
1319                             (*sep == ';') &&    /* separator            */
1320                             ( sep != str) &&    /* past string start    */
1321                             (*(sep-1) != '\\')) /* and NOT escaped      */
1322                                 break;
1323                 }
1324
1325                 /*
1326                  * Limit the token to data between separators
1327                  */
1328                 token = str;
1329                 if (*sep) {
1330                         str = sep + 1;  /* start of command for next pass */
1331                         *sep = '\0';
1332                 }
1333                 else
1334                         str = sep;      /* no more commands for next pass */
1335 #ifdef DEBUG_PARSER
1336                 printf ("token: \"%s\"\n", token);
1337 #endif
1338
1339                 /* find macros in this token and replace them */
1340                 process_macros (token, finaltoken);
1341
1342                 /* Extract arguments */
1343                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1344                         rc = -1;        /* no command at all */
1345                         continue;
1346                 }
1347
1348                 /* Look up command in command table */
1349                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1350                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1351                         rc = -1;        /* give up after bad command */
1352                         continue;
1353                 }
1354
1355                 /* found - check max args */
1356                 if (argc > cmdtp->maxargs) {
1357                         cmd_usage(cmdtp);
1358                         rc = -1;
1359                         continue;
1360                 }
1361
1362 #if defined(CONFIG_CMD_BOOTD)
1363                 /* avoid "bootd" recursion */
1364                 if (cmdtp->cmd == do_bootd) {
1365 #ifdef DEBUG_PARSER
1366                         printf ("[%s]\n", finaltoken);
1367 #endif
1368                         if (flag & CMD_FLAG_BOOTD) {
1369                                 puts ("'bootd' recursion detected\n");
1370                                 rc = -1;
1371                                 continue;
1372                         } else {
1373                                 flag |= CMD_FLAG_BOOTD;
1374                         }
1375                 }
1376 #endif
1377
1378                 /* OK - call function to do the command */
1379                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1380                         rc = -1;
1381                 }
1382
1383                 repeatable &= cmdtp->repeatable;
1384
1385                 /* Did the user stop this? */
1386                 if (had_ctrlc ())
1387                         return -1;      /* if stopped then not repeatable */
1388         }
1389
1390         return rc ? rc : repeatable;
1391 }
1392
1393 /****************************************************************************/
1394
1395 #if defined(CONFIG_CMD_RUN)
1396 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1397 {
1398         int i;
1399
1400         if (argc < 2)
1401                 return cmd_usage(cmdtp);
1402
1403         for (i=1; i<argc; ++i) {
1404                 char *arg;
1405
1406                 if ((arg = getenv (argv[i])) == NULL) {
1407                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1408                         return 1;
1409                 }
1410
1411                 if (run_command2(arg, flag) != 0)
1412                         return 1;
1413         }
1414         return 0;
1415 }
1416 #endif