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 #include <menu.h>
  45
  46 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
  47 DECLARE_GLOBAL_DATA_PTR;
  48 #endif
  49
  50 /*
  51  * Board-specific Platform code can reimplement show_boot_progress () if needed
  52  */
  53 void inline __show_boot_progress (int val) {}
  54 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  55
  56 #if defined(CONFIG_UPDATE_TFTP)
  57 int update_tftp (ulong addr);
  58 #endif /* CONFIG_UPDATE_TFTP */
  59
  60 #define MAX_DELAY_STOP_STR 32
  61
  62 #undef DEBUG_PARSER
  63
  64 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
  65
  66 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  67 static const char erase_seq[] = "\b \b";                /* erase sequence       */
  68 static const char   tab_seq[] = "        ";             /* used to expand TABs  */
  69
  70 #ifdef CONFIG_BOOT_RETRY_TIME
  71 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  72 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  73 #endif
  74
  75 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  76
  77 #ifndef CONFIG_BOOT_RETRY_MIN
  78 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  79 #endif
  80
  81 #ifdef CONFIG_MODEM_SUPPORT
  82 int do_mdm_init = 0;
  83 extern void mdm_init(void); /* defined in board.c */
  84 #endif
  85
  86 /***************************************************************************
  87  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  88  * returns: 0 -  no key string, allow autoboot 1 - got key string, abort
  89  */
  90 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  91 # if defined(CONFIG_AUTOBOOT_KEYED)
  92 #ifndef CONFIG_MENU
  93 static inline
  94 #endif
  95 int abortboot(int bootdelay)
  96 {
  97         int abort = 0;
  98         uint64_t etime = endtick(bootdelay);
  99         struct {
 100                 char* str;
 101                 u_int len;
 102                 int retry;
 103         }
 104         delaykey [] = {
 105                 { str: getenv ("bootdelaykey"),  retry: 1 },
 106                 { str: getenv ("bootdelaykey2"), retry: 1 },
 107                 { str: getenv ("bootstopkey"),   retry: 0 },
 108                 { str: getenv ("bootstopkey2"),  retry: 0 },
 109         };
 110
 111         char presskey [MAX_DELAY_STOP_STR];
 112         u_int presskey_len = 0;
 113         u_int presskey_max = 0;
 114         u_int i;
 115
 116 #  ifdef CONFIG_AUTOBOOT_PROMPT
 117         printf(CONFIG_AUTOBOOT_PROMPT);
 118 #  endif
 119
 120 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 121         if (delaykey[0].str == NULL)
 122                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 123 #  endif
 124 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 125         if (delaykey[1].str == NULL)
 126                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 127 #  endif
 128 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 129         if (delaykey[2].str == NULL)
 130                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 131 #  endif
 132 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 133         if (delaykey[3].str == NULL)
 134                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 135 #  endif
 136
 137         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 138                 delaykey[i].len = delaykey[i].str == NULL ?
 139                                     0 : strlen (delaykey[i].str);
 140                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 141                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 142
 143                 presskey_max = presskey_max > delaykey[i].len ?
 144                                     presskey_max : delaykey[i].len;
 145
 146 #  if DEBUG_BOOTKEYS
 147                 printf("%s key:<%s>\n",
 148                        delaykey[i].retry ? "delay" : "stop",
 149                        delaykey[i].str ? delaykey[i].str : "NULL");
 150 #  endif
 151         }
 152
 153         /* In order to keep up with incoming data, check timeout only
 154          * when catch up.
 155          */
 156         do {
 157                 if (tstc()) {
 158                         if (presskey_len < presskey_max) {
 159                                 presskey [presskey_len ++] = getc();
 160                         }
 161                         else {
 162                                 for (i = 0; i < presskey_max - 1; i ++)
 163                                         presskey [i] = presskey [i + 1];
 164
 165                                 presskey [i] = getc();
 166                         }
 167                 }
 168
 169                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 170                         if (delaykey[i].len > 0 &&
 171                             presskey_len >= delaykey[i].len &&
 172                             memcmp (presskey + presskey_len - delaykey[i].len,
 173                                     delaykey[i].str,
 174                                     delaykey[i].len) == 0) {
 175 #  if DEBUG_BOOTKEYS
 176                                 printf("got %skey\n",
 177                                        delaykey[i].retry ? "delay" : "stop");
 178 #  endif
 179
 180 #  ifdef CONFIG_BOOT_RETRY_TIME
 181                                 /* don't retry auto boot */
 182                                 if (! delaykey[i].retry)
 183                                         retry_time = -1;
 184 #  endif
 185                                 abort = 1;
 186                         }
 187                 }
 188         } while (!abort && get_ticks() <= etime);
 189
 190 #  if DEBUG_BOOTKEYS
 191         if (!abort)
 192                 puts("key timeout\n");
 193 #  endif
 194
 195 #ifdef CONFIG_SILENT_CONSOLE
 196         if (abort)
 197                 gd->flags &= ~GD_FLG_SILENT;
 198 #endif
 199
 200         return abort;
 201 }
 202
 203 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 204
 205 #ifdef CONFIG_MENUKEY
 206 static int menukey = 0;
 207 #endif
 208
 209 #ifndef CONFIG_MENU
 210 static inline
 211 #endif
 212 int abortboot(int bootdelay)
 213 {
 214         int abort = 0;
 215
 216 #ifdef CONFIG_MENUPROMPT
 217         printf(CONFIG_MENUPROMPT);
 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 CONFIG_SYS_HUSH_PARSER
 275         static char lastcommand[CONFIG_SYS_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 #ifdef CONFIG_BOOTCOUNT_LIMIT
 296         bootcount = bootcount_load();
 297         bootcount++;
 298         bootcount_store (bootcount);
 299         sprintf (bcs_set, "%lu", bootcount);
 300         setenv ("bootcount", bcs_set);
 301         bcs = getenv ("bootlimit");
 302         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 303 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 304
 305 #ifdef CONFIG_MODEM_SUPPORT
 306         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 307         if (do_mdm_init) {
 308                 char *str = strdup(getenv("mdm_cmd"));
 309                 setenv ("preboot", str);  /* set or delete definition */
 310                 if (str != NULL)
 311                         free (str);
 312                 mdm_init(); /* wait for modem connection */
 313         }
 314 #endif  /* CONFIG_MODEM_SUPPORT */
 315
 316 #ifdef CONFIG_VERSION_VARIABLE
 317         {
 318                 setenv ("ver", version_string);  /* set version variable */
 319         }
 320 #endif /* CONFIG_VERSION_VARIABLE */
 321
 322 #ifdef CONFIG_SYS_HUSH_PARSER
 323         u_boot_hush_start ();
 324 #endif
 325
 326 #if defined(CONFIG_HUSH_INIT_VAR)
 327         hush_init_var ();
 328 #endif
 329
 330 #ifdef CONFIG_PREBOOT
 331         if ((p = getenv ("preboot")) != NULL) {
 332 # ifdef CONFIG_AUTOBOOT_KEYED
 333                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 334 # endif
 335
 336                 run_command(p, 0);
 337
 338 # ifdef CONFIG_AUTOBOOT_KEYED
 339                 disable_ctrlc(prev);    /* restore Control C checking */
 340 # endif
 341         }
 342 #endif /* CONFIG_PREBOOT */
 343
 344 #if defined(CONFIG_UPDATE_TFTP)
 345         update_tftp (0UL);
 346 #endif /* CONFIG_UPDATE_TFTP */
 347
 348 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 349         s = getenv ("bootdelay");
 350         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 351
 352         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 353
 354 #if defined(CONFIG_MENU_SHOW)
 355         bootdelay = menu_show(bootdelay);
 356 #endif
 357 # ifdef CONFIG_BOOT_RETRY_TIME
 358         init_cmd_timeout ();
 359 # endif /* CONFIG_BOOT_RETRY_TIME */
 360
 361 #ifdef CONFIG_POST
 362         if (gd->flags & GD_FLG_POSTFAIL) {
 363                 s = getenv("failbootcmd");
 364         }
 365         else
 366 #endif /* CONFIG_POST */
 367 #ifdef CONFIG_BOOTCOUNT_LIMIT
 368         if (bootlimit && (bootcount > bootlimit)) {
 369                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 370                         (unsigned)bootlimit);
 371                 s = getenv ("altbootcmd");
 372         }
 373         else
 374 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 375                 s = getenv ("bootcmd");
 376
 377         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 378
 379         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 380 # ifdef CONFIG_AUTOBOOT_KEYED
 381                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 382 # endif
 383
 384                 run_command(s, 0);
 385
 386 # ifdef CONFIG_AUTOBOOT_KEYED
 387                 disable_ctrlc(prev);    /* restore Control C checking */
 388 # endif
 389         }
 390
 391 # ifdef CONFIG_MENUKEY
 392         if (menukey == CONFIG_MENUKEY) {
 393                 s = getenv("menucmd");
 394                 if (s)
 395                         run_command(s, 0);
 396         }
 397 #endif /* CONFIG_MENUKEY */
 398 #endif /* CONFIG_BOOTDELAY */
 399
 400         /*
 401          * Main Loop for Monitor Command Processing
 402          */
 403 #ifdef CONFIG_SYS_HUSH_PARSER
 404         parse_file_outer();
 405         /* This point is never reached */
 406         for (;;);
 407 #else
 408         for (;;) {
 409 #ifdef CONFIG_BOOT_RETRY_TIME
 410                 if (rc >= 0) {
 411                         /* Saw enough of a valid command to
 412                          * restart the timeout.
 413                          */
 414                         reset_cmd_timeout();
 415                 }
 416 #endif
 417                 len = readline (CONFIG_SYS_PROMPT);
 418
 419                 flag = 0;       /* assume no special flags for now */
 420                 if (len > 0)
 421                         strcpy (lastcommand, console_buffer);
 422                 else if (len == 0)
 423                         flag |= CMD_FLAG_REPEAT;
 424 #ifdef CONFIG_BOOT_RETRY_TIME
 425                 else if (len == -2) {
 426                         /* -2 means timed out, retry autoboot
 427                          */
 428                         puts ("\nTimed out waiting for command\n");
 429 # ifdef CONFIG_RESET_TO_RETRY
 430                         /* Reinit board to run initialization code again */
 431                         do_reset (NULL, 0, 0, NULL);
 432 # else
 433                         return;         /* retry autoboot */
 434 # endif
 435                 }
 436 #endif
 437
 438                 if (len == -1)
 439                         puts ("<INTERRUPT>\n");
 440                 else
 441                         rc = run_command(lastcommand, flag);
 442
 443                 if (rc <= 0) {
 444                         /* invalid command or not repeatable, forget it */
 445                         lastcommand[0] = 0;
 446                 }
 447         }
 448 #endif /*CONFIG_SYS_HUSH_PARSER*/
 449 }
 450
 451 #ifdef CONFIG_BOOT_RETRY_TIME
 452 /***************************************************************************
 453  * initialize command line timeout
 454  */
 455 void init_cmd_timeout(void)
 456 {
 457         char *s = getenv ("bootretry");
 458
 459         if (s != NULL)
 460                 retry_time = (int)simple_strtol(s, NULL, 10);
 461         else
 462                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 463
 464         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 465                 retry_time = CONFIG_BOOT_RETRY_MIN;
 466 }
 467
 468 /***************************************************************************
 469  * reset command line timeout to retry_time seconds
 470  */
 471 void reset_cmd_timeout(void)
 472 {
 473         endtime = endtick(retry_time);
 474 }
 475 #endif
 476
 477 #ifdef CONFIG_CMDLINE_EDITING
 478
 479 /*
 480  * cmdline-editing related codes from vivi.
 481  * Author: Janghoon Lyu <nandy@mizi.com>
 482  */
 483
 484 #define putnstr(str,n)  do {                    \
 485                 printf ("%.*s", (int)n, str);   \
 486         } while (0)
 487
 488 #define CTL_CH(c)               ((c) - 'a' + 1)
 489 #define CTL_BACKSPACE           ('\b')
 490 #define DEL                     ((char)255)
 491 #define DEL7                    ((char)127)
 492 #define CREAD_HIST_CHAR         ('!')
 493
 494 #define getcmd_putch(ch)        putc(ch)
 495 #define getcmd_getch()          getc()
 496 #define getcmd_cbeep()          getcmd_putch('\a')
 497
 498 #define HIST_MAX                20
 499 #define HIST_SIZE               CONFIG_SYS_CBSIZE
 500
 501 static int hist_max = 0;
 502 static int hist_add_idx = 0;
 503 static int hist_cur = -1;
 504 unsigned hist_num = 0;
 505
 506 char* hist_list[HIST_MAX];
 507 char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
 508
 509 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 510
 511 static void hist_init(void)
 512 {
 513         int i;
 514
 515         hist_max = 0;
 516         hist_add_idx = 0;
 517         hist_cur = -1;
 518         hist_num = 0;
 519
 520         for (i = 0; i < HIST_MAX; i++) {
 521                 hist_list[i] = hist_lines[i];
 522                 hist_list[i][0] = '\0';
 523         }
 524 }
 525
 526 static void cread_add_to_hist(char *line)
 527 {
 528         strcpy(hist_list[hist_add_idx], line);
 529
 530         if (++hist_add_idx >= HIST_MAX)
 531                 hist_add_idx = 0;
 532
 533         if (hist_add_idx > hist_max)
 534                 hist_max = hist_add_idx;
 535
 536         hist_num++;
 537 }
 538
 539 static char* hist_prev(void)
 540 {
 541         char *ret;
 542         int old_cur;
 543
 544         if (hist_cur < 0)
 545                 return NULL;
 546
 547         old_cur = hist_cur;
 548         if (--hist_cur < 0)
 549                 hist_cur = hist_max;
 550
 551         if (hist_cur == hist_add_idx) {
 552                 hist_cur = old_cur;
 553                 ret = NULL;
 554         } else
 555                 ret = hist_list[hist_cur];
 556
 557         return (ret);
 558 }
 559
 560 static char* hist_next(void)
 561 {
 562         char *ret;
 563
 564         if (hist_cur < 0)
 565                 return NULL;
 566
 567         if (hist_cur == hist_add_idx)
 568                 return NULL;
 569
 570         if (++hist_cur > hist_max)
 571                 hist_cur = 0;
 572
 573         if (hist_cur == hist_add_idx) {
 574                 ret = "";
 575         } else
 576                 ret = hist_list[hist_cur];
 577
 578         return (ret);
 579 }
 580
 581 #ifndef CONFIG_CMDLINE_EDITING
 582 static void cread_print_hist_list(void)
 583 {
 584         int i;
 585         unsigned long n;
 586
 587         n = hist_num - hist_max;
 588
 589         i = hist_add_idx + 1;
 590         while (1) {
 591                 if (i > hist_max)
 592                         i = 0;
 593                 if (i == hist_add_idx)
 594                         break;
 595                 printf("%s\n", hist_list[i]);
 596                 n++;
 597                 i++;
 598         }
 599 }
 600 #endif /* CONFIG_CMDLINE_EDITING */
 601
 602 #define BEGINNING_OF_LINE() {                   \
 603         while (num) {                           \
 604                 getcmd_putch(CTL_BACKSPACE);    \
 605                 num--;                          \
 606         }                                       \
 607 }
 608
 609 #define ERASE_TO_EOL() {                                \
 610         if (num < eol_num) {                            \
 611                 printf("%*s", (int)(eol_num - num), ""); \
 612                 do {                                    \
 613                         getcmd_putch(CTL_BACKSPACE);    \
 614                 } while (--eol_num > num);              \
 615         }                                               \
 616 }
 617
 618 #define REFRESH_TO_EOL() {                      \
 619         if (num < eol_num) {                    \
 620                 wlen = eol_num - num;           \
 621                 putnstr(buf + num, wlen);       \
 622                 num = eol_num;                  \
 623         }                                       \
 624 }
 625
 626 static void cread_add_char(char ichar, int insert, unsigned long *num,
 627                unsigned long *eol_num, char *buf, unsigned long len)
 628 {
 629         unsigned long wlen;
 630
 631         /* room ??? */
 632         if (insert || *num == *eol_num) {
 633                 if (*eol_num > len - 1) {
 634                         getcmd_cbeep();
 635                         return;
 636                 }
 637                 (*eol_num)++;
 638         }
 639
 640         if (insert) {
 641                 wlen = *eol_num - *num;
 642                 if (wlen > 1) {
 643                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 644                 }
 645
 646                 buf[*num] = ichar;
 647                 putnstr(buf + *num, wlen);
 648                 (*num)++;
 649                 while (--wlen) {
 650                         getcmd_putch(CTL_BACKSPACE);
 651                 }
 652         } else {
 653                 /* echo the character */
 654                 wlen = 1;
 655                 buf[*num] = ichar;
 656                 putnstr(buf + *num, wlen);
 657                 (*num)++;
 658         }
 659 }
 660
 661 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 662               unsigned long *eol_num, char *buf, unsigned long len)
 663 {
 664         while (strsize--) {
 665                 cread_add_char(*str, insert, num, eol_num, buf, len);
 666                 str++;
 667         }
 668 }
 669
 670 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
 671                 int timeout)
 672 {
 673         unsigned long num = 0;
 674         unsigned long eol_num = 0;
 675         unsigned long wlen;
 676         char ichar;
 677         int insert = 1;
 678         int esc_len = 0;
 679         char esc_save[8];
 680         int init_len = strlen(buf);
 681         int first = 1;
 682
 683         if (init_len)
 684                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
 685
 686         while (1) {
 687 #ifdef CONFIG_BOOT_RETRY_TIME
 688                 while (!tstc()) {       /* while no incoming data */
 689                         if (retry_time >= 0 && get_ticks() > endtime)
 690                                 return (-2);    /* timed out */
 691                         WATCHDOG_RESET();
 692                 }
 693 #endif
 694                 if (first && timeout) {
 695                         uint64_t etime = endtick(timeout);
 696
 697                         while (!tstc()) {       /* while no incoming data */
 698                                 if (get_ticks() >= etime)
 699                                         return -2;      /* timed out */
 700                                 WATCHDOG_RESET();
 701                         }
 702                         first = 0;
 703                 }
 704
 705                 ichar = getcmd_getch();
 706
 707                 if ((ichar == '\n') || (ichar == '\r')) {
 708                         putc('\n');
 709                         break;
 710                 }
 711
 712                 /*
 713                  * handle standard linux xterm esc sequences for arrow key, etc.
 714                  */
 715                 if (esc_len != 0) {
 716                         if (esc_len == 1) {
 717                                 if (ichar == '[') {
 718                                         esc_save[esc_len] = ichar;
 719                                         esc_len = 2;
 720                                 } else {
 721                                         cread_add_str(esc_save, esc_len, insert,
 722                                                       &num, &eol_num, buf, *len);
 723                                         esc_len = 0;
 724                                 }
 725                                 continue;
 726                         }
 727
 728                         switch (ichar) {
 729
 730                         case 'D':       /* <- key */
 731                                 ichar = CTL_CH('b');
 732                                 esc_len = 0;
 733                                 break;
 734                         case 'C':       /* -> key */
 735                                 ichar = CTL_CH('f');
 736                                 esc_len = 0;
 737                                 break;  /* pass off to ^F handler */
 738                         case 'H':       /* Home key */
 739                                 ichar = CTL_CH('a');
 740                                 esc_len = 0;
 741                                 break;  /* pass off to ^A handler */
 742                         case 'A':       /* up arrow */
 743                                 ichar = CTL_CH('p');
 744                                 esc_len = 0;
 745                                 break;  /* pass off to ^P handler */
 746                         case 'B':       /* down arrow */
 747                                 ichar = CTL_CH('n');
 748                                 esc_len = 0;
 749                                 break;  /* pass off to ^N handler */
 750                         default:
 751                                 esc_save[esc_len++] = ichar;
 752                                 cread_add_str(esc_save, esc_len, insert,
 753                                               &num, &eol_num, buf, *len);
 754                                 esc_len = 0;
 755                                 continue;
 756                         }
 757                 }
 758
 759                 switch (ichar) {
 760                 case 0x1b:
 761                         if (esc_len == 0) {
 762                                 esc_save[esc_len] = ichar;
 763                                 esc_len = 1;
 764                         } else {
 765                                 puts("impossible condition #876\n");
 766                                 esc_len = 0;
 767                         }
 768                         break;
 769
 770                 case CTL_CH('a'):
 771                         BEGINNING_OF_LINE();
 772                         break;
 773                 case CTL_CH('c'):       /* ^C - break */
 774                         *buf = '\0';    /* discard input */
 775                         return (-1);
 776                 case CTL_CH('f'):
 777                         if (num < eol_num) {
 778                                 getcmd_putch(buf[num]);
 779                                 num++;
 780                         }
 781                         break;
 782                 case CTL_CH('b'):
 783                         if (num) {
 784                                 getcmd_putch(CTL_BACKSPACE);
 785                                 num--;
 786                         }
 787                         break;
 788                 case CTL_CH('d'):
 789                         if (num < eol_num) {
 790                                 wlen = eol_num - num - 1;
 791                                 if (wlen) {
 792                                         memmove(&buf[num], &buf[num+1], wlen);
 793                                         putnstr(buf + num, wlen);
 794                                 }
 795
 796                                 getcmd_putch(' ');
 797                                 do {
 798                                         getcmd_putch(CTL_BACKSPACE);
 799                                 } while (wlen--);
 800                                 eol_num--;
 801                         }
 802                         break;
 803                 case CTL_CH('k'):
 804                         ERASE_TO_EOL();
 805                         break;
 806                 case CTL_CH('e'):
 807                         REFRESH_TO_EOL();
 808                         break;
 809                 case CTL_CH('o'):
 810                         insert = !insert;
 811                         break;
 812                 case CTL_CH('x'):
 813                 case CTL_CH('u'):
 814                         BEGINNING_OF_LINE();
 815                         ERASE_TO_EOL();
 816                         break;
 817                 case DEL:
 818                 case DEL7:
 819                 case 8:
 820                         if (num) {
 821                                 wlen = eol_num - num;
 822                                 num--;
 823                                 memmove(&buf[num], &buf[num+1], wlen);
 824                                 getcmd_putch(CTL_BACKSPACE);
 825                                 putnstr(buf + num, wlen);
 826                                 getcmd_putch(' ');
 827                                 do {
 828                                         getcmd_putch(CTL_BACKSPACE);
 829                                 } while (wlen--);
 830                                 eol_num--;
 831                         }
 832                         break;
 833                 case CTL_CH('p'):
 834                 case CTL_CH('n'):
 835                 {
 836                         char * hline;
 837
 838                         esc_len = 0;
 839
 840                         if (ichar == CTL_CH('p'))
 841                                 hline = hist_prev();
 842                         else
 843                                 hline = hist_next();
 844
 845                         if (!hline) {
 846                                 getcmd_cbeep();
 847                                 continue;
 848                         }
 849
 850                         /* nuke the current line */
 851                         /* first, go home */
 852                         BEGINNING_OF_LINE();
 853
 854                         /* erase to end of line */
 855                         ERASE_TO_EOL();
 856
 857                         /* copy new line into place and display */
 858                         strcpy(buf, hline);
 859                         eol_num = strlen(buf);
 860                         REFRESH_TO_EOL();
 861                         continue;
 862                 }
 863 #ifdef CONFIG_AUTO_COMPLETE
 864                 case '\t': {
 865                         int num2, col;
 866
 867                         /* do not autocomplete when in the middle */
 868                         if (num < eol_num) {
 869                                 getcmd_cbeep();
 870                                 break;
 871                         }
 872
 873                         buf[num] = '\0';
 874                         col = strlen(prompt) + eol_num;
 875                         num2 = num;
 876                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 877                                 col = num2 - num;
 878                                 num += col;
 879                                 eol_num += col;
 880                         }
 881                         break;
 882                 }
 883 #endif
 884                 default:
 885                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 886                         break;
 887                 }
 888         }
 889         *len = eol_num;
 890         buf[eol_num] = '\0';    /* lose the newline */
 891
 892         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 893                 cread_add_to_hist(buf);
 894         hist_cur = hist_add_idx;
 895
 896         return 0;
 897 }
 898
 899 #endif /* CONFIG_CMDLINE_EDITING */
 900
 901 /****************************************************************************/
 902
 903 /*
 904  * Prompt for input and read a line.
 905  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 906  * time out when time goes past endtime (timebase time in ticks).
 907  * Return:      number of read characters
 908  *              -1 if break
 909  *              -2 if timed out
 910  */
 911 int readline (const char *const prompt)
 912 {
 913         /*
 914          * If console_buffer isn't 0-length the user will be prompted to modify
 915          * it instead of entering it from scratch as desired.
 916          */
 917         console_buffer[0] = '\0';
 918
 919         return readline_into_buffer(prompt, console_buffer, 0);
 920 }
 921
 922
 923 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
 924 {
 925         char *p = buffer;
 926 #ifdef CONFIG_CMDLINE_EDITING
 927         unsigned int len = CONFIG_SYS_CBSIZE;
 928         int rc;
 929         static int initted = 0;
 930
 931         /*
 932          * History uses a global array which is not
 933          * writable until after relocation to RAM.
 934          * Revert to non-history version if still
 935          * running from flash.
 936          */
 937         if (gd->flags & GD_FLG_RELOC) {
 938                 if (!initted) {
 939                         hist_init();
 940                         initted = 1;
 941                 }
 942
 943                 if (prompt)
 944                         puts (prompt);
 945
 946                 rc = cread_line(prompt, p, &len, timeout);
 947                 return rc < 0 ? rc : len;
 948
 949         } else {
 950 #endif  /* CONFIG_CMDLINE_EDITING */
 951         char * p_buf = p;
 952         int     n = 0;                          /* buffer index         */
 953         int     plen = 0;                       /* prompt length        */
 954         int     col;                            /* output column cnt    */
 955         char    c;
 956
 957         /* print prompt */
 958         if (prompt) {
 959                 plen = strlen (prompt);
 960                 puts (prompt);
 961         }
 962         col = plen;
 963
 964         for (;;) {
 965 #ifdef CONFIG_BOOT_RETRY_TIME
 966                 while (!tstc()) {       /* while no incoming data */
 967                         if (retry_time >= 0 && get_ticks() > endtime)
 968                                 return (-2);    /* timed out */
 969                         WATCHDOG_RESET();
 970                 }
 971 #endif
 972                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 973
 974 #ifdef CONFIG_SHOW_ACTIVITY
 975                 while (!tstc()) {
 976                         extern void show_activity(int arg);
 977                         show_activity(0);
 978                         WATCHDOG_RESET();
 979                 }
 980 #endif
 981                 c = getc();
 982
 983                 /*
 984                  * Special character handling
 985                  */
 986                 switch (c) {
 987                 case '\r':                              /* Enter                */
 988                 case '\n':
 989                         *p = '\0';
 990                         puts ("\r\n");
 991                         return (p - p_buf);
 992
 993                 case '\0':                              /* nul                  */
 994                         continue;
 995
 996                 case 0x03:                              /* ^C - break           */
 997                         p_buf[0] = '\0';        /* discard input */
 998                         return (-1);
 999
1000                 case 0x15:                              /* ^U - erase line      */
1001                         while (col > plen) {
1002                                 puts (erase_seq);
1003                                 --col;
1004                         }
1005                         p = p_buf;
1006                         n = 0;
1007                         continue;
1008
1009                 case 0x17:                              /* ^W - erase word      */
1010                         p=delete_char(p_buf, p, &col, &n, plen);
1011                         while ((n > 0) && (*p != ' ')) {
1012                                 p=delete_char(p_buf, p, &col, &n, plen);
1013                         }
1014                         continue;
1015
1016                 case 0x08:                              /* ^H  - backspace      */
1017                 case 0x7F:                              /* DEL - backspace      */
1018                         p=delete_char(p_buf, p, &col, &n, plen);
1019                         continue;
1020
1021                 default:
1022                         /*
1023                          * Must be a normal character then
1024                          */
1025                         if (n < CONFIG_SYS_CBSIZE-2) {
1026                                 if (c == '\t') {        /* expand TABs          */
1027 #ifdef CONFIG_AUTO_COMPLETE
1028                                         /* if auto completion triggered just continue */
1029                                         *p = '\0';
1030                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1031                                                 p = p_buf + n;  /* reset */
1032                                                 continue;
1033                                         }
1034 #endif
1035                                         puts (tab_seq+(col&07));
1036                                         col += 8 - (col&07);
1037                                 } else {
1038                                         ++col;          /* echo input           */
1039                                         putc (c);
1040                                 }
1041                                 *p++ = c;
1042                                 ++n;
1043                         } else {                        /* Buffer full          */
1044                                 putc ('\a');
1045                         }
1046                 }
1047         }
1048 #ifdef CONFIG_CMDLINE_EDITING
1049         }
1050 #endif
1051 }
1052
1053 /****************************************************************************/
1054
1055 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1056 {
1057         char *s;
1058
1059         if (*np == 0) {
1060                 return (p);
1061         }
1062
1063         if (*(--p) == '\t') {                   /* will retype the whole line   */
1064                 while (*colp > plen) {
1065                         puts (erase_seq);
1066                         (*colp)--;
1067                 }
1068                 for (s=buffer; s<p; ++s) {
1069                         if (*s == '\t') {
1070                                 puts (tab_seq+((*colp) & 07));
1071                                 *colp += 8 - ((*colp) & 07);
1072                         } else {
1073                                 ++(*colp);
1074                                 putc (*s);
1075                         }
1076                 }
1077         } else {
1078                 puts (erase_seq);
1079                 (*colp)--;
1080         }
1081         (*np)--;
1082         return (p);
1083 }
1084
1085 /****************************************************************************/
1086
1087 int parse_line (char *line, char *argv[])
1088 {
1089         int nargs = 0;
1090
1091 #ifdef DEBUG_PARSER
1092         printf ("parse_line: \"%s\"\n", line);
1093 #endif
1094         while (nargs < CONFIG_SYS_MAXARGS) {
1095
1096                 /* skip any white space */
1097                 while (isblank(*line))
1098                         ++line;
1099
1100                 if (*line == '\0') {    /* end of line, no more args    */
1101                         argv[nargs] = NULL;
1102 #ifdef DEBUG_PARSER
1103                 printf ("parse_line: nargs=%d\n", nargs);
1104 #endif
1105                         return (nargs);
1106                 }
1107
1108                 argv[nargs++] = line;   /* begin of argument string     */
1109
1110                 /* find end of string */
1111                 while (*line && !isblank(*line))
1112                         ++line;
1113
1114                 if (*line == '\0') {    /* end of line, no more args    */
1115                         argv[nargs] = NULL;
1116 #ifdef DEBUG_PARSER
1117                 printf ("parse_line: nargs=%d\n", nargs);
1118 #endif
1119                         return (nargs);
1120                 }
1121
1122                 *line++ = '\0';         /* terminate current arg         */
1123         }
1124
1125         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1126
1127 #ifdef DEBUG_PARSER
1128         printf ("parse_line: nargs=%d\n", nargs);
1129 #endif
1130         return (nargs);
1131 }
1132
1133 /****************************************************************************/
1134
1135 #ifndef CONFIG_SYS_HUSH_PARSER
1136 static void process_macros (const char *input, char *output)
1137 {
1138         char c, prev;
1139         const char *varname_start = NULL;
1140         int inputcnt = strlen (input);
1141         int outputcnt = CONFIG_SYS_CBSIZE;
1142         int state = 0;          /* 0 = waiting for '$'  */
1143
1144         /* 1 = waiting for '(' or '{' */
1145         /* 2 = waiting for ')' or '}' */
1146         /* 3 = waiting for '''  */
1147 #ifdef DEBUG_PARSER
1148         char *output_start = output;
1149
1150         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1151                 input);
1152 #endif
1153
1154         prev = '\0';            /* previous character   */
1155
1156         while (inputcnt && outputcnt) {
1157                 c = *input++;
1158                 inputcnt--;
1159
1160                 if (state != 3) {
1161                         /* remove one level of escape characters */
1162                         if ((c == '\\') && (prev != '\\')) {
1163                                 if (inputcnt-- == 0)
1164                                         break;
1165                                 prev = c;
1166                                 c = *input++;
1167                         }
1168                 }
1169
1170                 switch (state) {
1171                 case 0: /* Waiting for (unescaped) $    */
1172                         if ((c == '\'') && (prev != '\\')) {
1173                                 state = 3;
1174                                 break;
1175                         }
1176                         if ((c == '$') && (prev != '\\')) {
1177                                 state++;
1178                         } else {
1179                                 *(output++) = c;
1180                                 outputcnt--;
1181                         }
1182                         break;
1183                 case 1: /* Waiting for (        */
1184                         if (c == '(' || c == '{') {
1185                                 state++;
1186                                 varname_start = input;
1187                         } else {
1188                                 state = 0;
1189                                 *(output++) = '$';
1190                                 outputcnt--;
1191
1192                                 if (outputcnt) {
1193                                         *(output++) = c;
1194                                         outputcnt--;
1195                                 }
1196                         }
1197                         break;
1198                 case 2: /* Waiting for )        */
1199                         if (c == ')' || c == '}') {
1200                                 int i;
1201                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1202                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1203
1204                                 /* Get the varname */
1205                                 for (i = 0; i < envcnt; i++) {
1206                                         envname[i] = varname_start[i];
1207                                 }
1208                                 envname[i] = 0;
1209
1210                                 /* Get its value */
1211                                 envval = getenv (envname);
1212
1213                                 /* Copy into the line if it exists */
1214                                 if (envval != NULL)
1215                                         while ((*envval) && outputcnt) {
1216                                                 *(output++) = *(envval++);
1217                                                 outputcnt--;
1218                                         }
1219                                 /* Look for another '$' */
1220                                 state = 0;
1221                         }
1222                         break;
1223                 case 3: /* Waiting for '        */
1224                         if ((c == '\'') && (prev != '\\')) {
1225                                 state = 0;
1226                         } else {
1227                                 *(output++) = c;
1228                                 outputcnt--;
1229                         }
1230                         break;
1231                 }
1232                 prev = c;
1233         }
1234
1235         if (outputcnt)
1236                 *output = 0;
1237         else
1238                 *(output - 1) = 0;
1239
1240 #ifdef DEBUG_PARSER
1241         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1242                 strlen (output_start), output_start);
1243 #endif
1244 }
1245
1246 /****************************************************************************
1247  * returns:
1248  *      1  - command executed, repeatable
1249  *      0  - command executed but not repeatable, interrupted commands are
1250  *           always considered not repeatable
1251  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1252  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1253  *           considered unrecognized)
1254  *
1255  * WARNING:
1256  *
1257  * We must create a temporary copy of the command since the command we get
1258  * may be the result from getenv(), which returns a pointer directly to
1259  * the environment data, which may change magicly when the command we run
1260  * creates or modifies environment variables (like "bootp" does).
1261  */
1262 static int builtin_run_command(const char *cmd, int flag)
1263 {
1264         cmd_tbl_t *cmdtp;
1265         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1266         char *token;                    /* start of token in cmdbuf     */
1267         char *sep;                      /* end of token (separator) in cmdbuf */
1268         char finaltoken[CONFIG_SYS_CBSIZE];
1269         char *str = cmdbuf;
1270         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1271         int argc, inquotes;
1272         int repeatable = 1;
1273         int rc = 0;
1274
1275 #ifdef DEBUG_PARSER
1276         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1277         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1278         puts ("\"\n");
1279 #endif
1280
1281         clear_ctrlc();          /* forget any previous Control C */
1282
1283         if (!cmd || !*cmd) {
1284                 return -1;      /* empty command */
1285         }
1286
1287         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1288                 puts ("## Command too long!\n");
1289                 return -1;
1290         }
1291
1292         strcpy (cmdbuf, cmd);
1293
1294         /* Process separators and check for invalid
1295          * repeatable commands
1296          */
1297
1298 #ifdef DEBUG_PARSER
1299         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1300 #endif
1301         while (*str) {
1302
1303                 /*
1304                  * Find separator, or string end
1305                  * Allow simple escape of ';' by writing "\;"
1306                  */
1307                 for (inquotes = 0, sep = str; *sep; sep++) {
1308                         if ((*sep=='\'') &&
1309                             (*(sep-1) != '\\'))
1310                                 inquotes=!inquotes;
1311
1312                         if (!inquotes &&
1313                             (*sep == ';') &&    /* separator            */
1314                             ( sep != str) &&    /* past string start    */
1315                             (*(sep-1) != '\\')) /* and NOT escaped      */
1316                                 break;
1317                 }
1318
1319                 /*
1320                  * Limit the token to data between separators
1321                  */
1322                 token = str;
1323                 if (*sep) {
1324                         str = sep + 1;  /* start of command for next pass */
1325                         *sep = '\0';
1326                 }
1327                 else
1328                         str = sep;      /* no more commands for next pass */
1329 #ifdef DEBUG_PARSER
1330                 printf ("token: \"%s\"\n", token);
1331 #endif
1332
1333                 /* find macros in this token and replace them */
1334                 process_macros (token, finaltoken);
1335
1336                 /* Extract arguments */
1337                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1338                         rc = -1;        /* no command at all */
1339                         continue;
1340                 }
1341
1342                 /* Look up command in command table */
1343                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1344                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1345                         rc = -1;        /* give up after bad command */
1346                         continue;
1347                 }
1348
1349                 /* found - check max args */
1350                 if (argc > cmdtp->maxargs) {
1351                         cmd_usage(cmdtp);
1352                         rc = -1;
1353                         continue;
1354                 }
1355
1356 #if defined(CONFIG_CMD_BOOTD)
1357                 /* avoid "bootd" recursion */
1358                 if (cmdtp->cmd == do_bootd) {
1359 #ifdef DEBUG_PARSER
1360                         printf ("[%s]\n", finaltoken);
1361 #endif
1362                         if (flag & CMD_FLAG_BOOTD) {
1363                                 puts ("'bootd' recursion detected\n");
1364                                 rc = -1;
1365                                 continue;
1366                         } else {
1367                                 flag |= CMD_FLAG_BOOTD;
1368                         }
1369                 }
1370 #endif
1371
1372                 /* OK - call function to do the command */
1373                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1374                         rc = -1;
1375                 }
1376
1377                 repeatable &= cmdtp->repeatable;
1378
1379                 /* Did the user stop this? */
1380                 if (had_ctrlc ())
1381                         return -1;      /* if stopped then not repeatable */
1382         }
1383
1384         return rc ? rc : repeatable;
1385 }
1386 #endif
1387
1388 /*
1389  * Run a command using the selected parser.
1390  *
1391  * @param cmd   Command to run
1392  * @param flag  Execution flags (CMD_FLAG_...)
1393  * @return 0 on success, or != 0 on error.
1394  */
1395 int run_command(const char *cmd, int flag)
1396 {
1397 #ifndef CONFIG_SYS_HUSH_PARSER
1398         /*
1399          * builtin_run_command can return 0 or 1 for success, so clean up
1400          * its result.
1401          */
1402         if (builtin_run_command(cmd, flag) == -1)
1403                 return 1;
1404
1405         return 0;
1406 #else
1407         return parse_string_outer(cmd,
1408                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1409 #endif
1410 }
1411
1412 /****************************************************************************/
1413
1414 #if defined(CONFIG_CMD_RUN)
1415 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1416 {
1417         int i;
1418
1419         if (argc < 2)
1420                 return cmd_usage(cmdtp);
1421
1422         for (i=1; i<argc; ++i) {
1423                 char *arg;
1424
1425                 if ((arg = getenv (argv[i])) == NULL) {
1426                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1427                         return 1;
1428                 }
1429
1430                 if (run_command(arg, flag) != 0)
1431                         return 1;
1432         }
1433         return 0;
1434 }
1435 #endif