common/main.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Add to readline cmdline-editing by
   6  * (C) Copyright 2005
   7  * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /* #define      DEBUG   */
  29
  30 #include <common.h>
  31 #include <watchdog.h>
  32 #include <command.h>
  33 #ifdef CONFIG_MODEM_SUPPORT
  34 #include <malloc.h>             /* for free() prototype */
  35 #endif
  36
  37 #ifdef CONFIG_SYS_HUSH_PARSER
  38 #include <hush.h>
  39 #endif
  40
  41 #include <post.h>
  42
  43 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
  44 DECLARE_GLOBAL_DATA_PTR;
  45 #endif
  46
  47 /*
  48  * Board-specific Platform code can reimplement show_boot_progress () if needed
  49  */
  50 void inline __show_boot_progress (int val) {}
  51 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  52
  53 #if defined(CONFIG_UPDATE_TFTP)
  54 void update_tftp (void);
  55 #endif /* CONFIG_UPDATE_TFTP */
  56
  57 #define MAX_DELAY_STOP_STR 32
  58
  59 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  60 static int abortboot(int);
  61 #endif
  62
  63 #undef DEBUG_PARSER
  64
  65 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
  66
  67 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  68 static char erase_seq[] = "\b \b";              /* erase sequence       */
  69 static char   tab_seq[] = "        ";           /* used to expand TABs  */
  70
  71 #ifdef CONFIG_BOOT_RETRY_TIME
  72 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  73 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  74 #endif
  75
  76 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  77
  78 #ifndef CONFIG_BOOT_RETRY_MIN
  79 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  80 #endif
  81
  82 #ifdef CONFIG_MODEM_SUPPORT
  83 int do_mdm_init = 0;
  84 extern void mdm_init(void); /* defined in board.c */
  85 #endif
  86
  87 /***************************************************************************
  88  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  89  * returns: 0 -  no key string, allow autoboot
  90  *          1 - got key string, abort
  91  */
  92 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  93 # if defined(CONFIG_AUTOBOOT_KEYED)
  94 static __inline__ 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 static __inline__ int abortboot(int bootdelay)
 209 {
 210         int abort = 0;
 211
 212 #ifdef CONFIG_MENUPROMPT
 213         printf(CONFIG_MENUPROMPT);
 214 #else
 215         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 216 #endif
 217
 218 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 219         /*
 220          * Check if key already pressed
 221          * Don't check if bootdelay < 0
 222          */
 223         if (bootdelay >= 0) {
 224                 if (tstc()) {   /* we got a key press   */
 225                         (void) getc();  /* consume input        */
 226                         puts ("\b\b\b 0");
 227                         abort = 1;      /* don't auto boot      */
 228                 }
 229         }
 230 #endif
 231
 232         while ((bootdelay > 0) && (!abort)) {
 233                 int i;
 234
 235                 --bootdelay;
 236                 /* delay 100 * 10ms */
 237                 for (i=0; !abort && i<100; ++i) {
 238                         if (tstc()) {   /* we got a key press   */
 239                                 abort  = 1;     /* don't auto boot      */
 240                                 bootdelay = 0;  /* no more delay        */
 241 # ifdef CONFIG_MENUKEY
 242                                 menukey = getc();
 243 # else
 244                                 (void) getc();  /* consume input        */
 245 # endif
 246                                 break;
 247                         }
 248                         udelay(10000);
 249                 }
 250
 251                 printf("\b\b\b%2d ", bootdelay);
 252         }
 253
 254         putc('\n');
 255
 256 #ifdef CONFIG_SILENT_CONSOLE
 257         if (abort)
 258                 gd->flags &= ~GD_FLG_SILENT;
 259 #endif
 260
 261         return abort;
 262 }
 263 # endif /* CONFIG_AUTOBOOT_KEYED */
 264 #endif  /* CONFIG_BOOTDELAY >= 0  */
 265
 266 /****************************************************************************/
 267
 268 void main_loop (void)
 269 {
 270 #ifndef CONFIG_SYS_HUSH_PARSER
 271         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
 272         int len;
 273         int rc = 1;
 274         int flag;
 275 #endif
 276
 277 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 278         char *s;
 279         int bootdelay;
 280 #endif
 281 #ifdef CONFIG_PREBOOT
 282         char *p;
 283 #endif
 284 #ifdef CONFIG_BOOTCOUNT_LIMIT
 285         unsigned long bootcount = 0;
 286         unsigned long bootlimit = 0;
 287         char *bcs;
 288         char bcs_set[16];
 289 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 290
 291 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
 292         ulong bmp = 0;          /* default bitmap */
 293         extern int trab_vfd (ulong bitmap);
 294
 295 #ifdef CONFIG_MODEM_SUPPORT
 296         if (do_mdm_init)
 297                 bmp = 1;        /* alternate bitmap */
 298 #endif
 299         trab_vfd (bmp);
 300 #endif  /* CONFIG_VFD && VFD_TEST_LOGO */
 301
 302 #ifdef CONFIG_BOOTCOUNT_LIMIT
 303         bootcount = bootcount_load();
 304         bootcount++;
 305         bootcount_store (bootcount);
 306         sprintf (bcs_set, "%lu", bootcount);
 307         setenv ("bootcount", bcs_set);
 308         bcs = getenv ("bootlimit");
 309         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 310 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 311
 312 #ifdef CONFIG_MODEM_SUPPORT
 313         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 314         if (do_mdm_init) {
 315                 char *str = strdup(getenv("mdm_cmd"));
 316                 setenv ("preboot", str);  /* set or delete definition */
 317                 if (str != NULL)
 318                         free (str);
 319                 mdm_init(); /* wait for modem connection */
 320         }
 321 #endif  /* CONFIG_MODEM_SUPPORT */
 322
 323 #ifdef CONFIG_VERSION_VARIABLE
 324         {
 325                 extern char version_string[];
 326
 327                 setenv ("ver", version_string);  /* set version variable */
 328         }
 329 #endif /* CONFIG_VERSION_VARIABLE */
 330
 331 #ifdef CONFIG_SYS_HUSH_PARSER
 332         u_boot_hush_start ();
 333 #endif
 334
 335 #if defined(CONFIG_HUSH_INIT_VAR)
 336         hush_init_var ();
 337 #endif
 338
 339 #ifdef CONFIG_AUTO_COMPLETE
 340         install_auto_complete();
 341 #endif
 342
 343 #ifdef CONFIG_PREBOOT
 344         if ((p = getenv ("preboot")) != NULL) {
 345 # ifdef CONFIG_AUTOBOOT_KEYED
 346                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 347 # endif
 348
 349 # ifndef CONFIG_SYS_HUSH_PARSER
 350                 run_command (p, 0);
 351 # else
 352                 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
 353                                     FLAG_EXIT_FROM_LOOP);
 354 # endif
 355
 356 # ifdef CONFIG_AUTOBOOT_KEYED
 357                 disable_ctrlc(prev);    /* restore Control C checking */
 358 # endif
 359         }
 360 #endif /* CONFIG_PREBOOT */
 361
 362 #if defined(CONFIG_UPDATE_TFTP)
 363         update_tftp ();
 364 #endif /* CONFIG_UPDATE_TFTP */
 365
 366 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 367         s = getenv ("bootdelay");
 368         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 369
 370         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 371
 372 # ifdef CONFIG_BOOT_RETRY_TIME
 373         init_cmd_timeout ();
 374 # endif /* CONFIG_BOOT_RETRY_TIME */
 375
 376 #ifdef CONFIG_POST
 377         if (gd->flags & GD_FLG_POSTFAIL) {
 378                 s = getenv("failbootcmd");
 379         }
 380         else
 381 #endif /* CONFIG_POST */
 382 #ifdef CONFIG_BOOTCOUNT_LIMIT
 383         if (bootlimit && (bootcount > bootlimit)) {
 384                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 385                         (unsigned)bootlimit);
 386                 s = getenv ("altbootcmd");
 387         }
 388         else
 389 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 390                 s = getenv ("bootcmd");
 391
 392         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 393
 394         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 395 # ifdef CONFIG_AUTOBOOT_KEYED
 396                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 397 # endif
 398
 399 # ifndef CONFIG_SYS_HUSH_PARSER
 400                 run_command (s, 0);
 401 # else
 402                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 403                                     FLAG_EXIT_FROM_LOOP);
 404 # endif
 405
 406 # ifdef CONFIG_AUTOBOOT_KEYED
 407                 disable_ctrlc(prev);    /* restore Control C checking */
 408 # endif
 409         }
 410
 411 # ifdef CONFIG_MENUKEY
 412         if (menukey == CONFIG_MENUKEY) {
 413             s = getenv("menucmd");
 414             if (s) {
 415 # ifndef CONFIG_SYS_HUSH_PARSER
 416                 run_command (s, 0);
 417 # else
 418                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 419                                     FLAG_EXIT_FROM_LOOP);
 420 # endif
 421             }
 422         }
 423 #endif /* CONFIG_MENUKEY */
 424 #endif /* CONFIG_BOOTDELAY */
 425
 426         /*
 427          * Main Loop for Monitor Command Processing
 428          */
 429 #ifdef CONFIG_SYS_HUSH_PARSER
 430         parse_file_outer();
 431         /* This point is never reached */
 432         for (;;);
 433 #else
 434         for (;;) {
 435 #ifdef CONFIG_BOOT_RETRY_TIME
 436                 if (rc >= 0) {
 437                         /* Saw enough of a valid command to
 438                          * restart the timeout.
 439                          */
 440                         reset_cmd_timeout();
 441                 }
 442 #endif
 443                 len = readline (CONFIG_SYS_PROMPT);
 444
 445                 flag = 0;       /* assume no special flags for now */
 446                 if (len > 0)
 447                         strcpy (lastcommand, console_buffer);
 448                 else if (len == 0)
 449                         flag |= CMD_FLAG_REPEAT;
 450 #ifdef CONFIG_BOOT_RETRY_TIME
 451                 else if (len == -2) {
 452                         /* -2 means timed out, retry autoboot
 453                          */
 454                         puts ("\nTimed out waiting for command\n");
 455 # ifdef CONFIG_RESET_TO_RETRY
 456                         /* Reinit board to run initialization code again */
 457                         do_reset (NULL, 0, 0, NULL);
 458 # else
 459                         return;         /* retry autoboot */
 460 # endif
 461                 }
 462 #endif
 463
 464                 if (len == -1)
 465                         puts ("<INTERRUPT>\n");
 466                 else
 467                         rc = run_command (lastcommand, flag);
 468
 469                 if (rc <= 0) {
 470                         /* invalid command or not repeatable, forget it */
 471                         lastcommand[0] = 0;
 472                 }
 473         }
 474 #endif /*CONFIG_SYS_HUSH_PARSER*/
 475 }
 476
 477 #ifdef CONFIG_BOOT_RETRY_TIME
 478 /***************************************************************************
 479  * initialize command line timeout
 480  */
 481 void init_cmd_timeout(void)
 482 {
 483         char *s = getenv ("bootretry");
 484
 485         if (s != NULL)
 486                 retry_time = (int)simple_strtol(s, NULL, 10);
 487         else
 488                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 489
 490         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 491                 retry_time = CONFIG_BOOT_RETRY_MIN;
 492 }
 493
 494 /***************************************************************************
 495  * reset command line timeout to retry_time seconds
 496  */
 497 void reset_cmd_timeout(void)
 498 {
 499         endtime = endtick(retry_time);
 500 }
 501 #endif
 502
 503 #ifdef CONFIG_CMDLINE_EDITING
 504
 505 /*
 506  * cmdline-editing related codes from vivi.
 507  * Author: Janghoon Lyu <nandy@mizi.com>
 508  */
 509
 510 #define putnstr(str,n)  do {                    \
 511                 printf ("%.*s", (int)n, str);   \
 512         } while (0)
 513
 514 #define CTL_CH(c)               ((c) - 'a' + 1)
 515 #define CTL_BACKSPACE           ('\b')
 516 #define DEL                     ((char)255)
 517 #define DEL7                    ((char)127)
 518 #define CREAD_HIST_CHAR         ('!')
 519
 520 #define getcmd_putch(ch)        putc(ch)
 521 #define getcmd_getch()          getc()
 522 #define getcmd_cbeep()          getcmd_putch('\a')
 523
 524 #define HIST_MAX                20
 525 #define HIST_SIZE               CONFIG_SYS_CBSIZE
 526
 527 static int hist_max = 0;
 528 static int hist_add_idx = 0;
 529 static int hist_cur = -1;
 530 unsigned hist_num = 0;
 531
 532 char* hist_list[HIST_MAX];
 533 char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
 534
 535 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 536
 537 static void hist_init(void)
 538 {
 539         int i;
 540
 541         hist_max = 0;
 542         hist_add_idx = 0;
 543         hist_cur = -1;
 544         hist_num = 0;
 545
 546         for (i = 0; i < HIST_MAX; i++) {
 547                 hist_list[i] = hist_lines[i];
 548                 hist_list[i][0] = '\0';
 549         }
 550 }
 551
 552 static void cread_add_to_hist(char *line)
 553 {
 554         strcpy(hist_list[hist_add_idx], line);
 555
 556         if (++hist_add_idx >= HIST_MAX)
 557                 hist_add_idx = 0;
 558
 559         if (hist_add_idx > hist_max)
 560                 hist_max = hist_add_idx;
 561
 562         hist_num++;
 563 }
 564
 565 static char* hist_prev(void)
 566 {
 567         char *ret;
 568         int old_cur;
 569
 570         if (hist_cur < 0)
 571                 return NULL;
 572
 573         old_cur = hist_cur;
 574         if (--hist_cur < 0)
 575                 hist_cur = hist_max;
 576
 577         if (hist_cur == hist_add_idx) {
 578                 hist_cur = old_cur;
 579                 ret = NULL;
 580         } else
 581                 ret = hist_list[hist_cur];
 582
 583         return (ret);
 584 }
 585
 586 static char* hist_next(void)
 587 {
 588         char *ret;
 589
 590         if (hist_cur < 0)
 591                 return NULL;
 592
 593         if (hist_cur == hist_add_idx)
 594                 return NULL;
 595
 596         if (++hist_cur > hist_max)
 597                 hist_cur = 0;
 598
 599         if (hist_cur == hist_add_idx) {
 600                 ret = "";
 601         } else
 602                 ret = hist_list[hist_cur];
 603
 604         return (ret);
 605 }
 606
 607 #ifndef CONFIG_CMDLINE_EDITING
 608 static void cread_print_hist_list(void)
 609 {
 610         int i;
 611         unsigned long n;
 612
 613         n = hist_num - hist_max;
 614
 615         i = hist_add_idx + 1;
 616         while (1) {
 617                 if (i > hist_max)
 618                         i = 0;
 619                 if (i == hist_add_idx)
 620                         break;
 621                 printf("%s\n", hist_list[i]);
 622                 n++;
 623                 i++;
 624         }
 625 }
 626 #endif /* CONFIG_CMDLINE_EDITING */
 627
 628 #define BEGINNING_OF_LINE() {                   \
 629         while (num) {                           \
 630                 getcmd_putch(CTL_BACKSPACE);    \
 631                 num--;                          \
 632         }                                       \
 633 }
 634
 635 #define ERASE_TO_EOL() {                                \
 636         if (num < eol_num) {                            \
 637                 printf("%*s", (int)(eol_num - num), ""); \
 638                 do {                                    \
 639                         getcmd_putch(CTL_BACKSPACE);    \
 640                 } while (--eol_num > num);              \
 641         }                                               \
 642 }
 643
 644 #define REFRESH_TO_EOL() {                      \
 645         if (num < eol_num) {                    \
 646                 wlen = eol_num - num;           \
 647                 putnstr(buf + num, wlen);       \
 648                 num = eol_num;                  \
 649         }                                       \
 650 }
 651
 652 static void cread_add_char(char ichar, int insert, unsigned long *num,
 653                unsigned long *eol_num, char *buf, unsigned long len)
 654 {
 655         unsigned long wlen;
 656
 657         /* room ??? */
 658         if (insert || *num == *eol_num) {
 659                 if (*eol_num > len - 1) {
 660                         getcmd_cbeep();
 661                         return;
 662                 }
 663                 (*eol_num)++;
 664         }
 665
 666         if (insert) {
 667                 wlen = *eol_num - *num;
 668                 if (wlen > 1) {
 669                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 670                 }
 671
 672                 buf[*num] = ichar;
 673                 putnstr(buf + *num, wlen);
 674                 (*num)++;
 675                 while (--wlen) {
 676                         getcmd_putch(CTL_BACKSPACE);
 677                 }
 678         } else {
 679                 /* echo the character */
 680                 wlen = 1;
 681                 buf[*num] = ichar;
 682                 putnstr(buf + *num, wlen);
 683                 (*num)++;
 684         }
 685 }
 686
 687 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 688               unsigned long *eol_num, char *buf, unsigned long len)
 689 {
 690         while (strsize--) {
 691                 cread_add_char(*str, insert, num, eol_num, buf, len);
 692                 str++;
 693         }
 694 }
 695
 696 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
 697 {
 698         unsigned long num = 0;
 699         unsigned long eol_num = 0;
 700         unsigned long wlen;
 701         char ichar;
 702         int insert = 1;
 703         int esc_len = 0;
 704         char esc_save[8];
 705         int init_len = strlen(buf);
 706
 707         if (init_len)
 708                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
 709
 710         while (1) {
 711 #ifdef CONFIG_BOOT_RETRY_TIME
 712                 while (!tstc()) {       /* while no incoming data */
 713                         if (retry_time >= 0 && get_ticks() > endtime)
 714                                 return (-2);    /* timed out */
 715                         WATCHDOG_RESET();
 716                 }
 717 #endif
 718
 719                 ichar = getcmd_getch();
 720
 721                 if ((ichar == '\n') || (ichar == '\r')) {
 722                         putc('\n');
 723                         break;
 724                 }
 725
 726                 /*
 727                  * handle standard linux xterm esc sequences for arrow key, etc.
 728                  */
 729                 if (esc_len != 0) {
 730                         if (esc_len == 1) {
 731                                 if (ichar == '[') {
 732                                         esc_save[esc_len] = ichar;
 733                                         esc_len = 2;
 734                                 } else {
 735                                         cread_add_str(esc_save, esc_len, insert,
 736                                                       &num, &eol_num, buf, *len);
 737                                         esc_len = 0;
 738                                 }
 739                                 continue;
 740                         }
 741
 742                         switch (ichar) {
 743
 744                         case 'D':       /* <- key */
 745                                 ichar = CTL_CH('b');
 746                                 esc_len = 0;
 747                                 break;
 748                         case 'C':       /* -> key */
 749                                 ichar = CTL_CH('f');
 750                                 esc_len = 0;
 751                                 break;  /* pass off to ^F handler */
 752                         case 'H':       /* Home key */
 753                                 ichar = CTL_CH('a');
 754                                 esc_len = 0;
 755                                 break;  /* pass off to ^A handler */
 756                         case 'A':       /* up arrow */
 757                                 ichar = CTL_CH('p');
 758                                 esc_len = 0;
 759                                 break;  /* pass off to ^P handler */
 760                         case 'B':       /* down arrow */
 761                                 ichar = CTL_CH('n');
 762                                 esc_len = 0;
 763                                 break;  /* pass off to ^N handler */
 764                         default:
 765                                 esc_save[esc_len++] = ichar;
 766                                 cread_add_str(esc_save, esc_len, insert,
 767                                               &num, &eol_num, buf, *len);
 768                                 esc_len = 0;
 769                                 continue;
 770                         }
 771                 }
 772
 773                 switch (ichar) {
 774                 case 0x1b:
 775                         if (esc_len == 0) {
 776                                 esc_save[esc_len] = ichar;
 777                                 esc_len = 1;
 778                         } else {
 779                                 puts("impossible condition #876\n");
 780                                 esc_len = 0;
 781                         }
 782                         break;
 783
 784                 case CTL_CH('a'):
 785                         BEGINNING_OF_LINE();
 786                         break;
 787                 case CTL_CH('c'):       /* ^C - break */
 788                         *buf = '\0';    /* discard input */
 789                         return (-1);
 790                 case CTL_CH('f'):
 791                         if (num < eol_num) {
 792                                 getcmd_putch(buf[num]);
 793                                 num++;
 794                         }
 795                         break;
 796                 case CTL_CH('b'):
 797                         if (num) {
 798                                 getcmd_putch(CTL_BACKSPACE);
 799                                 num--;
 800                         }
 801                         break;
 802                 case CTL_CH('d'):
 803                         if (num < eol_num) {
 804                                 wlen = eol_num - num - 1;
 805                                 if (wlen) {
 806                                         memmove(&buf[num], &buf[num+1], wlen);
 807                                         putnstr(buf + num, wlen);
 808                                 }
 809
 810                                 getcmd_putch(' ');
 811                                 do {
 812                                         getcmd_putch(CTL_BACKSPACE);
 813                                 } while (wlen--);
 814                                 eol_num--;
 815                         }
 816                         break;
 817                 case CTL_CH('k'):
 818                         ERASE_TO_EOL();
 819                         break;
 820                 case CTL_CH('e'):
 821                         REFRESH_TO_EOL();
 822                         break;
 823                 case CTL_CH('o'):
 824                         insert = !insert;
 825                         break;
 826                 case CTL_CH('x'):
 827                 case CTL_CH('u'):
 828                         BEGINNING_OF_LINE();
 829                         ERASE_TO_EOL();
 830                         break;
 831                 case DEL:
 832                 case DEL7:
 833                 case 8:
 834                         if (num) {
 835                                 wlen = eol_num - num;
 836                                 num--;
 837                                 memmove(&buf[num], &buf[num+1], wlen);
 838                                 getcmd_putch(CTL_BACKSPACE);
 839                                 putnstr(buf + num, wlen);
 840                                 getcmd_putch(' ');
 841                                 do {
 842                                         getcmd_putch(CTL_BACKSPACE);
 843                                 } while (wlen--);
 844                                 eol_num--;
 845                         }
 846                         break;
 847                 case CTL_CH('p'):
 848                 case CTL_CH('n'):
 849                 {
 850                         char * hline;
 851
 852                         esc_len = 0;
 853
 854                         if (ichar == CTL_CH('p'))
 855                                 hline = hist_prev();
 856                         else
 857                                 hline = hist_next();
 858
 859                         if (!hline) {
 860                                 getcmd_cbeep();
 861                                 continue;
 862                         }
 863
 864                         /* nuke the current line */
 865                         /* first, go home */
 866                         BEGINNING_OF_LINE();
 867
 868                         /* erase to end of line */
 869                         ERASE_TO_EOL();
 870
 871                         /* copy new line into place and display */
 872                         strcpy(buf, hline);
 873                         eol_num = strlen(buf);
 874                         REFRESH_TO_EOL();
 875                         continue;
 876                 }
 877 #ifdef CONFIG_AUTO_COMPLETE
 878                 case '\t': {
 879                         int num2, col;
 880
 881                         /* do not autocomplete when in the middle */
 882                         if (num < eol_num) {
 883                                 getcmd_cbeep();
 884                                 break;
 885                         }
 886
 887                         buf[num] = '\0';
 888                         col = strlen(prompt) + eol_num;
 889                         num2 = num;
 890                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 891                                 col = num2 - num;
 892                                 num += col;
 893                                 eol_num += col;
 894                         }
 895                         break;
 896                 }
 897 #endif
 898                 default:
 899                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 900                         break;
 901                 }
 902         }
 903         *len = eol_num;
 904         buf[eol_num] = '\0';    /* lose the newline */
 905
 906         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 907                 cread_add_to_hist(buf);
 908         hist_cur = hist_add_idx;
 909
 910         return 0;
 911 }
 912
 913 #endif /* CONFIG_CMDLINE_EDITING */
 914
 915 /****************************************************************************/
 916
 917 /*
 918  * Prompt for input and read a line.
 919  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 920  * time out when time goes past endtime (timebase time in ticks).
 921  * Return:      number of read characters
 922  *              -1 if break
 923  *              -2 if timed out
 924  */
 925 int readline (const char *const prompt)
 926 {
 927         /*
 928          * If console_buffer isn't 0-length the user will be prompted to modify
 929          * it instead of entering it from scratch as desired.
 930          */
 931         console_buffer[0] = '\0';
 932
 933         return readline_into_buffer(prompt, console_buffer);
 934 }
 935
 936
 937 int readline_into_buffer (const char *const prompt, char * buffer)
 938 {
 939         char *p = buffer;
 940 #ifdef CONFIG_CMDLINE_EDITING
 941         unsigned int len = CONFIG_SYS_CBSIZE;
 942         int rc;
 943         static int initted = 0;
 944
 945         /*
 946          * History uses a global array which is not
 947          * writable until after relocation to RAM.
 948          * Revert to non-history version if still
 949          * running from flash.
 950          */
 951         if (gd->flags & GD_FLG_RELOC) {
 952                 if (!initted) {
 953                         hist_init();
 954                         initted = 1;
 955                 }
 956
 957                 if (prompt)
 958                         puts (prompt);
 959
 960                 rc = cread_line(prompt, p, &len);
 961                 return rc < 0 ? rc : len;
 962
 963         } else {
 964 #endif  /* CONFIG_CMDLINE_EDITING */
 965         char * p_buf = p;
 966         int     n = 0;                          /* buffer index         */
 967         int     plen = 0;                       /* prompt length        */
 968         int     col;                            /* output column cnt    */
 969         char    c;
 970
 971         /* print prompt */
 972         if (prompt) {
 973                 plen = strlen (prompt);
 974                 puts (prompt);
 975         }
 976         col = plen;
 977
 978         for (;;) {
 979 #ifdef CONFIG_BOOT_RETRY_TIME
 980                 while (!tstc()) {       /* while no incoming data */
 981                         if (retry_time >= 0 && get_ticks() > endtime)
 982                                 return (-2);    /* timed out */
 983                         WATCHDOG_RESET();
 984                 }
 985 #endif
 986                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 987
 988 #ifdef CONFIG_SHOW_ACTIVITY
 989                 while (!tstc()) {
 990                         extern void show_activity(int arg);
 991                         show_activity(0);
 992                         WATCHDOG_RESET();
 993                 }
 994 #endif
 995                 c = getc();
 996
 997                 /*
 998                  * Special character handling
 999                  */
1000                 switch (c) {
1001                 case '\r':                              /* Enter                */
1002                 case '\n':
1003                         *p = '\0';
1004                         puts ("\r\n");
1005                         return (p - p_buf);
1006
1007                 case '\0':                              /* nul                  */
1008                         continue;
1009
1010                 case 0x03:                              /* ^C - break           */
1011                         p_buf[0] = '\0';        /* discard input */
1012                         return (-1);
1013
1014                 case 0x15:                              /* ^U - erase line      */
1015                         while (col > plen) {
1016                                 puts (erase_seq);
1017                                 --col;
1018                         }
1019                         p = p_buf;
1020                         n = 0;
1021                         continue;
1022
1023                 case 0x17:                              /* ^W - erase word      */
1024                         p=delete_char(p_buf, p, &col, &n, plen);
1025                         while ((n > 0) && (*p != ' ')) {
1026                                 p=delete_char(p_buf, p, &col, &n, plen);
1027                         }
1028                         continue;
1029
1030                 case 0x08:                              /* ^H  - backspace      */
1031                 case 0x7F:                              /* DEL - backspace      */
1032                         p=delete_char(p_buf, p, &col, &n, plen);
1033                         continue;
1034
1035                 default:
1036                         /*
1037                          * Must be a normal character then
1038                          */
1039                         if (n < CONFIG_SYS_CBSIZE-2) {
1040                                 if (c == '\t') {        /* expand TABs          */
1041 #ifdef CONFIG_AUTO_COMPLETE
1042                                         /* if auto completion triggered just continue */
1043                                         *p = '\0';
1044                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1045                                                 p = p_buf + n;  /* reset */
1046                                                 continue;
1047                                         }
1048 #endif
1049                                         puts (tab_seq+(col&07));
1050                                         col += 8 - (col&07);
1051                                 } else {
1052                                         ++col;          /* echo input           */
1053                                         putc (c);
1054                                 }
1055                                 *p++ = c;
1056                                 ++n;
1057                         } else {                        /* Buffer full          */
1058                                 putc ('\a');
1059                         }
1060                 }
1061         }
1062 #ifdef CONFIG_CMDLINE_EDITING
1063         }
1064 #endif
1065 }
1066
1067 /****************************************************************************/
1068
1069 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1070 {
1071         char *s;
1072
1073         if (*np == 0) {
1074                 return (p);
1075         }
1076
1077         if (*(--p) == '\t') {                   /* will retype the whole line   */
1078                 while (*colp > plen) {
1079                         puts (erase_seq);
1080                         (*colp)--;
1081                 }
1082                 for (s=buffer; s<p; ++s) {
1083                         if (*s == '\t') {
1084                                 puts (tab_seq+((*colp) & 07));
1085                                 *colp += 8 - ((*colp) & 07);
1086                         } else {
1087                                 ++(*colp);
1088                                 putc (*s);
1089                         }
1090                 }
1091         } else {
1092                 puts (erase_seq);
1093                 (*colp)--;
1094         }
1095         (*np)--;
1096         return (p);
1097 }
1098
1099 /****************************************************************************/
1100
1101 int parse_line (char *line, char *argv[])
1102 {
1103         int nargs = 0;
1104
1105 #ifdef DEBUG_PARSER
1106         printf ("parse_line: \"%s\"\n", line);
1107 #endif
1108         while (nargs < CONFIG_SYS_MAXARGS) {
1109
1110                 /* skip any white space */
1111                 while ((*line == ' ') || (*line == '\t')) {
1112                         ++line;
1113                 }
1114
1115                 if (*line == '\0') {    /* end of line, no more args    */
1116                         argv[nargs] = NULL;
1117 #ifdef DEBUG_PARSER
1118                 printf ("parse_line: nargs=%d\n", nargs);
1119 #endif
1120                         return (nargs);
1121                 }
1122
1123                 argv[nargs++] = line;   /* begin of argument string     */
1124
1125                 /* find end of string */
1126                 while (*line && (*line != ' ') && (*line != '\t')) {
1127                         ++line;
1128                 }
1129
1130                 if (*line == '\0') {    /* end of line, no more args    */
1131                         argv[nargs] = NULL;
1132 #ifdef DEBUG_PARSER
1133                 printf ("parse_line: nargs=%d\n", nargs);
1134 #endif
1135                         return (nargs);
1136                 }
1137
1138                 *line++ = '\0';         /* terminate current arg         */
1139         }
1140
1141         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1142
1143 #ifdef DEBUG_PARSER
1144         printf ("parse_line: nargs=%d\n", nargs);
1145 #endif
1146         return (nargs);
1147 }
1148
1149 /****************************************************************************/
1150
1151 static void process_macros (const char *input, char *output)
1152 {
1153         char c, prev;
1154         const char *varname_start = NULL;
1155         int inputcnt = strlen (input);
1156         int outputcnt = CONFIG_SYS_CBSIZE;
1157         int state = 0;          /* 0 = waiting for '$'  */
1158
1159         /* 1 = waiting for '(' or '{' */
1160         /* 2 = waiting for ')' or '}' */
1161         /* 3 = waiting for '''  */
1162 #ifdef DEBUG_PARSER
1163         char *output_start = output;
1164
1165         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1166                 input);
1167 #endif
1168
1169         prev = '\0';            /* previous character   */
1170
1171         while (inputcnt && outputcnt) {
1172                 c = *input++;
1173                 inputcnt--;
1174
1175                 if (state != 3) {
1176                         /* remove one level of escape characters */
1177                         if ((c == '\\') && (prev != '\\')) {
1178                                 if (inputcnt-- == 0)
1179                                         break;
1180                                 prev = c;
1181                                 c = *input++;
1182                         }
1183                 }
1184
1185                 switch (state) {
1186                 case 0: /* Waiting for (unescaped) $    */
1187                         if ((c == '\'') && (prev != '\\')) {
1188                                 state = 3;
1189                                 break;
1190                         }
1191                         if ((c == '$') && (prev != '\\')) {
1192                                 state++;
1193                         } else {
1194                                 *(output++) = c;
1195                                 outputcnt--;
1196                         }
1197                         break;
1198                 case 1: /* Waiting for (        */
1199                         if (c == '(' || c == '{') {
1200                                 state++;
1201                                 varname_start = input;
1202                         } else {
1203                                 state = 0;
1204                                 *(output++) = '$';
1205                                 outputcnt--;
1206
1207                                 if (outputcnt) {
1208                                         *(output++) = c;
1209                                         outputcnt--;
1210                                 }
1211                         }
1212                         break;
1213                 case 2: /* Waiting for )        */
1214                         if (c == ')' || c == '}') {
1215                                 int i;
1216                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1217                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1218
1219                                 /* Get the varname */
1220                                 for (i = 0; i < envcnt; i++) {
1221                                         envname[i] = varname_start[i];
1222                                 }
1223                                 envname[i] = 0;
1224
1225                                 /* Get its value */
1226                                 envval = getenv (envname);
1227
1228                                 /* Copy into the line if it exists */
1229                                 if (envval != NULL)
1230                                         while ((*envval) && outputcnt) {
1231                                                 *(output++) = *(envval++);
1232                                                 outputcnt--;
1233                                         }
1234                                 /* Look for another '$' */
1235                                 state = 0;
1236                         }
1237                         break;
1238                 case 3: /* Waiting for '        */
1239                         if ((c == '\'') && (prev != '\\')) {
1240                                 state = 0;
1241                         } else {
1242                                 *(output++) = c;
1243                                 outputcnt--;
1244                         }
1245                         break;
1246                 }
1247                 prev = c;
1248         }
1249
1250         if (outputcnt)
1251                 *output = 0;
1252         else
1253                 *(output - 1) = 0;
1254
1255 #ifdef DEBUG_PARSER
1256         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1257                 strlen (output_start), output_start);
1258 #endif
1259 }
1260
1261 /****************************************************************************
1262  * returns:
1263  *      1  - command executed, repeatable
1264  *      0  - command executed but not repeatable, interrupted commands are
1265  *           always considered not repeatable
1266  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1267  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1268  *           considered unrecognized)
1269  *
1270  * WARNING:
1271  *
1272  * We must create a temporary copy of the command since the command we get
1273  * may be the result from getenv(), which returns a pointer directly to
1274  * the environment data, which may change magicly when the command we run
1275  * creates or modifies environment variables (like "bootp" does).
1276  */
1277
1278 int run_command (const char *cmd, int flag)
1279 {
1280         cmd_tbl_t *cmdtp;
1281         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1282         char *token;                    /* start of token in cmdbuf     */
1283         char *sep;                      /* end of token (separator) in cmdbuf */
1284         char finaltoken[CONFIG_SYS_CBSIZE];
1285         char *str = cmdbuf;
1286         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1287         int argc, inquotes;
1288         int repeatable = 1;
1289         int rc = 0;
1290
1291 #ifdef DEBUG_PARSER
1292         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1293         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1294         puts ("\"\n");
1295 #endif
1296
1297         clear_ctrlc();          /* forget any previous Control C */
1298
1299         if (!cmd || !*cmd) {
1300                 return -1;      /* empty command */
1301         }
1302
1303         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1304                 puts ("## Command too long!\n");
1305                 return -1;
1306         }
1307
1308         strcpy (cmdbuf, cmd);
1309
1310         /* Process separators and check for invalid
1311          * repeatable commands
1312          */
1313
1314 #ifdef DEBUG_PARSER
1315         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1316 #endif
1317         while (*str) {
1318
1319                 /*
1320                  * Find separator, or string end
1321                  * Allow simple escape of ';' by writing "\;"
1322                  */
1323                 for (inquotes = 0, sep = str; *sep; sep++) {
1324                         if ((*sep=='\'') &&
1325                             (*(sep-1) != '\\'))
1326                                 inquotes=!inquotes;
1327
1328                         if (!inquotes &&
1329                             (*sep == ';') &&    /* separator            */
1330                             ( sep != str) &&    /* past string start    */
1331                             (*(sep-1) != '\\')) /* and NOT escaped      */
1332                                 break;
1333                 }
1334
1335                 /*
1336                  * Limit the token to data between separators
1337                  */
1338                 token = str;
1339                 if (*sep) {
1340                         str = sep + 1;  /* start of command for next pass */
1341                         *sep = '\0';
1342                 }
1343                 else
1344                         str = sep;      /* no more commands for next pass */
1345 #ifdef DEBUG_PARSER
1346                 printf ("token: \"%s\"\n", token);
1347 #endif
1348
1349                 /* find macros in this token and replace them */
1350                 process_macros (token, finaltoken);
1351
1352                 /* Extract arguments */
1353                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1354                         rc = -1;        /* no command at all */
1355                         continue;
1356                 }
1357
1358                 /* Look up command in command table */
1359                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1360                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1361                         rc = -1;        /* give up after bad command */
1362                         continue;
1363                 }
1364
1365                 /* found - check max args */
1366                 if (argc > cmdtp->maxargs) {
1367                         cmd_usage(cmdtp);
1368                         rc = -1;
1369                         continue;
1370                 }
1371
1372 #if defined(CONFIG_CMD_BOOTD)
1373                 /* avoid "bootd" recursion */
1374                 if (cmdtp->cmd == do_bootd) {
1375 #ifdef DEBUG_PARSER
1376                         printf ("[%s]\n", finaltoken);
1377 #endif
1378                         if (flag & CMD_FLAG_BOOTD) {
1379                                 puts ("'bootd' recursion detected\n");
1380                                 rc = -1;
1381                                 continue;
1382                         } else {
1383                                 flag |= CMD_FLAG_BOOTD;
1384                         }
1385                 }
1386 #endif
1387
1388                 /* OK - call function to do the command */
1389                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1390                         rc = -1;
1391                 }
1392
1393                 repeatable &= cmdtp->repeatable;
1394
1395                 /* Did the user stop this? */
1396                 if (had_ctrlc ())
1397                         return -1;      /* if stopped then not repeatable */
1398         }
1399
1400         return rc ? rc : repeatable;
1401 }
1402
1403 /****************************************************************************/
1404
1405 #if defined(CONFIG_CMD_RUN)
1406 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1407 {
1408         int i;
1409
1410         if (argc < 2)
1411                 return cmd_usage(cmdtp);
1412
1413         for (i=1; i<argc; ++i) {
1414                 char *arg;
1415
1416                 if ((arg = getenv (argv[i])) == NULL) {
1417                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1418                         return 1;
1419                 }
1420 #ifndef CONFIG_SYS_HUSH_PARSER
1421                 if (run_command (arg, flag) == -1)
1422                         return 1;
1423 #else
1424                 if (parse_string_outer(arg,
1425                     FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1426                         return 1;
1427 #endif
1428         }
1429         return 0;
1430 }
1431 #endif