common/main.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Add to readline cmdline-editing by
   6  * (C) Copyright 2005
   7  * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /* #define      DEBUG   */
  29
  30 #include <common.h>
  31 #include <watchdog.h>
  32 #include <command.h>
  33 #ifdef CONFIG_MODEM_SUPPORT
  34 #include <malloc.h>             /* for free() prototype */
  35 #endif
  36
  37 #ifdef CFG_HUSH_PARSER
  38 #include <hush.h>
  39 #endif
  40
  41 #include <post.h>
  42
  43 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST)
  44 DECLARE_GLOBAL_DATA_PTR;
  45 #endif
  46
  47 /*
  48  * Board-specific Platform code can reimplement show_boot_progress () if needed
  49  */
  50 void inline __show_boot_progress (int val) {}
  51 void inline show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  52
  53 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
  54 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);               /* for do_reset() prototype */
  55 #endif
  56
  57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  58
  59
  60 #define MAX_DELAY_STOP_STR 32
  61
  62 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  63 static int abortboot(int);
  64 #endif
  65
  66 #undef DEBUG_PARSER
  67
  68 char        console_buffer[CFG_CBSIZE];         /* console I/O buffer   */
  69
  70 #ifndef CONFIG_CMDLINE_EDITING
  71 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  72 static char erase_seq[] = "\b \b";              /* erase sequence       */
  73 static char   tab_seq[] = "        ";           /* used to expand TABs  */
  74 #endif /* CONFIG_CMDLINE_EDITING */
  75
  76 #ifdef CONFIG_BOOT_RETRY_TIME
  77 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  78 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  79 #endif
  80
  81 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  82
  83 #ifndef CONFIG_BOOT_RETRY_MIN
  84 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  85 #endif
  86
  87 #ifdef CONFIG_MODEM_SUPPORT
  88 int do_mdm_init = 0;
  89 extern void mdm_init(void); /* defined in board.c */
  90 #endif
  91
  92 /***************************************************************************
  93  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  94  * returns: 0 -  no key string, allow autoboot
  95  *          1 - got key string, abort
  96  */
  97 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  98 # if defined(CONFIG_AUTOBOOT_KEYED)
  99 static __inline__ int abortboot(int bootdelay)
 100 {
 101         int abort = 0;
 102         uint64_t etime = endtick(bootdelay);
 103         struct {
 104                 char* str;
 105                 u_int len;
 106                 int retry;
 107         }
 108         delaykey [] = {
 109                 { str: getenv ("bootdelaykey"),  retry: 1 },
 110                 { str: getenv ("bootdelaykey2"), retry: 1 },
 111                 { str: getenv ("bootstopkey"),   retry: 0 },
 112                 { str: getenv ("bootstopkey2"),  retry: 0 },
 113         };
 114
 115         char presskey [MAX_DELAY_STOP_STR];
 116         u_int presskey_len = 0;
 117         u_int presskey_max = 0;
 118         u_int i;
 119
 120 #  ifdef CONFIG_AUTOBOOT_PROMPT
 121         printf(CONFIG_AUTOBOOT_PROMPT, bootdelay);
 122 #  endif
 123
 124 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 125         if (delaykey[0].str == NULL)
 126                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 127 #  endif
 128 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 129         if (delaykey[1].str == NULL)
 130                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 131 #  endif
 132 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 133         if (delaykey[2].str == NULL)
 134                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 135 #  endif
 136 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 137         if (delaykey[3].str == NULL)
 138                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 139 #  endif
 140
 141         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 142                 delaykey[i].len = delaykey[i].str == NULL ?
 143                                     0 : strlen (delaykey[i].str);
 144                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 145                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 146
 147                 presskey_max = presskey_max > delaykey[i].len ?
 148                                     presskey_max : delaykey[i].len;
 149
 150 #  if DEBUG_BOOTKEYS
 151                 printf("%s key:<%s>\n",
 152                        delaykey[i].retry ? "delay" : "stop",
 153                        delaykey[i].str ? delaykey[i].str : "NULL");
 154 #  endif
 155         }
 156
 157         /* In order to keep up with incoming data, check timeout only
 158          * when catch up.
 159          */
 160         while (!abort && get_ticks() <= etime) {
 161                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 162                         if (delaykey[i].len > 0 &&
 163                             presskey_len >= delaykey[i].len &&
 164                             memcmp (presskey + presskey_len - delaykey[i].len,
 165                                     delaykey[i].str,
 166                                     delaykey[i].len) == 0) {
 167 #  if DEBUG_BOOTKEYS
 168                                 printf("got %skey\n",
 169                                        delaykey[i].retry ? "delay" : "stop");
 170 #  endif
 171
 172 #  ifdef CONFIG_BOOT_RETRY_TIME
 173                                 /* don't retry auto boot */
 174                                 if (! delaykey[i].retry)
 175                                         retry_time = -1;
 176 #  endif
 177                                 abort = 1;
 178                         }
 179                 }
 180
 181                 if (tstc()) {
 182                         if (presskey_len < presskey_max) {
 183                                 presskey [presskey_len ++] = getc();
 184                         }
 185                         else {
 186                                 for (i = 0; i < presskey_max - 1; i ++)
 187                                         presskey [i] = presskey [i + 1];
 188
 189                                 presskey [i] = getc();
 190                         }
 191                 }
 192         }
 193 #  if DEBUG_BOOTKEYS
 194         if (!abort)
 195                 puts("key timeout\n");
 196 #  endif
 197
 198 #ifdef CONFIG_SILENT_CONSOLE
 199         if (abort)
 200                 gd->flags &= ~GD_FLG_SILENT;
 201 #endif
 202
 203         return abort;
 204 }
 205
 206 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 207
 208 #ifdef CONFIG_MENUKEY
 209 static int menukey = 0;
 210 #endif
 211
 212 static __inline__ int abortboot(int bootdelay)
 213 {
 214         int abort = 0;
 215
 216 #ifdef CONFIG_MENUPROMPT
 217         printf(CONFIG_MENUPROMPT, bootdelay);
 218 #else
 219         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 220 #endif
 221
 222 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 223         /*
 224          * Check if key already pressed
 225          * Don't check if bootdelay < 0
 226          */
 227         if (bootdelay >= 0) {
 228                 if (tstc()) {   /* we got a key press   */
 229                         (void) getc();  /* consume input        */
 230                         puts ("\b\b\b 0");
 231                         abort = 1;      /* don't auto boot      */
 232                 }
 233         }
 234 #endif
 235
 236         while ((bootdelay > 0) && (!abort)) {
 237                 int i;
 238
 239                 --bootdelay;
 240                 /* delay 100 * 10ms */
 241                 for (i=0; !abort && i<100; ++i) {
 242                         if (tstc()) {   /* we got a key press   */
 243                                 abort  = 1;     /* don't auto boot      */
 244                                 bootdelay = 0;  /* no more delay        */
 245 # ifdef CONFIG_MENUKEY
 246                                 menukey = getc();
 247 # else
 248                                 (void) getc();  /* consume input        */
 249 # endif
 250                                 break;
 251                         }
 252                         udelay(10000);
 253                 }
 254
 255                 printf("\b\b\b%2d ", bootdelay);
 256         }
 257
 258         putc('\n');
 259
 260 #ifdef CONFIG_SILENT_CONSOLE
 261         if (abort)
 262                 gd->flags &= ~GD_FLG_SILENT;
 263 #endif
 264
 265         return abort;
 266 }
 267 # endif /* CONFIG_AUTOBOOT_KEYED */
 268 #endif  /* CONFIG_BOOTDELAY >= 0  */
 269
 270 /****************************************************************************/
 271
 272 void main_loop (void)
 273 {
 274 #ifndef CFG_HUSH_PARSER
 275         static char lastcommand[CFG_CBSIZE] = { 0, };
 276         int len;
 277         int rc = 1;
 278         int flag;
 279 #endif
 280
 281 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 282         char *s;
 283         int bootdelay;
 284 #endif
 285 #ifdef CONFIG_PREBOOT
 286         char *p;
 287 #endif
 288 #ifdef CONFIG_BOOTCOUNT_LIMIT
 289         unsigned long bootcount = 0;
 290         unsigned long bootlimit = 0;
 291         char *bcs;
 292         char bcs_set[16];
 293 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 294
 295 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
 296         ulong bmp = 0;          /* default bitmap */
 297         extern int trab_vfd (ulong bitmap);
 298
 299 #ifdef CONFIG_MODEM_SUPPORT
 300         if (do_mdm_init)
 301                 bmp = 1;        /* alternate bitmap */
 302 #endif
 303         trab_vfd (bmp);
 304 #endif  /* CONFIG_VFD && VFD_TEST_LOGO */
 305
 306 #ifdef CONFIG_BOOTCOUNT_LIMIT
 307         bootcount = bootcount_load();
 308         bootcount++;
 309         bootcount_store (bootcount);
 310         sprintf (bcs_set, "%lu", bootcount);
 311         setenv ("bootcount", bcs_set);
 312         bcs = getenv ("bootlimit");
 313         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 314 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 315
 316 #ifdef CONFIG_MODEM_SUPPORT
 317         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 318         if (do_mdm_init) {
 319                 char *str = strdup(getenv("mdm_cmd"));
 320                 setenv ("preboot", str);  /* set or delete definition */
 321                 if (str != NULL)
 322                         free (str);
 323                 mdm_init(); /* wait for modem connection */
 324         }
 325 #endif  /* CONFIG_MODEM_SUPPORT */
 326
 327 #ifdef CONFIG_VERSION_VARIABLE
 328         {
 329                 extern char version_string[];
 330
 331                 setenv ("ver", version_string);  /* set version variable */
 332         }
 333 #endif /* CONFIG_VERSION_VARIABLE */
 334
 335 #ifdef CFG_HUSH_PARSER
 336         u_boot_hush_start ();
 337 #endif
 338
 339 #ifdef CONFIG_AUTO_COMPLETE
 340         install_auto_complete();
 341 #endif
 342
 343 #ifdef CONFIG_PREBOOT
 344         if ((p = getenv ("preboot")) != NULL) {
 345 # ifdef CONFIG_AUTOBOOT_KEYED
 346                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 347 # endif
 348
 349 # ifndef CFG_HUSH_PARSER
 350                 run_command (p, 0);
 351 # else
 352                 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
 353                                     FLAG_EXIT_FROM_LOOP);
 354 # endif
 355
 356 # ifdef CONFIG_AUTOBOOT_KEYED
 357                 disable_ctrlc(prev);    /* restore Control C checking */
 358 # endif
 359         }
 360 #endif /* CONFIG_PREBOOT */
 361
 362 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 363         s = getenv ("bootdelay");
 364         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 365
 366         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 367
 368 # ifdef CONFIG_BOOT_RETRY_TIME
 369         init_cmd_timeout ();
 370 # endif /* CONFIG_BOOT_RETRY_TIME */
 371
 372 #ifdef CONFIG_POST
 373         if (gd->flags & GD_FLG_POSTFAIL) {
 374                 s = getenv("failbootcmd");
 375         }
 376         else
 377 #endif /* CONFIG_POST */
 378 #ifdef CONFIG_BOOTCOUNT_LIMIT
 379         if (bootlimit && (bootcount > bootlimit)) {
 380                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 381                         (unsigned)bootlimit);
 382                 s = getenv ("altbootcmd");
 383         }
 384         else
 385 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 386                 s = getenv ("bootcmd");
 387
 388         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 389
 390         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 391 # ifdef CONFIG_AUTOBOOT_KEYED
 392                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 393 # endif
 394
 395 # ifndef CFG_HUSH_PARSER
 396                 run_command (s, 0);
 397 # else
 398                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 399                                     FLAG_EXIT_FROM_LOOP);
 400 # endif
 401
 402 # ifdef CONFIG_AUTOBOOT_KEYED
 403                 disable_ctrlc(prev);    /* restore Control C checking */
 404 # endif
 405         }
 406
 407 # ifdef CONFIG_MENUKEY
 408         if (menukey == CONFIG_MENUKEY) {
 409             s = getenv("menucmd");
 410             if (s) {
 411 # ifndef CFG_HUSH_PARSER
 412                 run_command (s, 0);
 413 # else
 414                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 415                                     FLAG_EXIT_FROM_LOOP);
 416 # endif
 417             }
 418         }
 419 #endif /* CONFIG_MENUKEY */
 420 #endif  /* CONFIG_BOOTDELAY */
 421
 422 #ifdef CONFIG_AMIGAONEG3SE
 423         {
 424             extern void video_banner(void);
 425             video_banner();
 426         }
 427 #endif
 428
 429         /*
 430          * Main Loop for Monitor Command Processing
 431          */
 432 #ifdef CFG_HUSH_PARSER
 433         parse_file_outer();
 434         /* This point is never reached */
 435         for (;;);
 436 #else
 437         for (;;) {
 438 #ifdef CONFIG_BOOT_RETRY_TIME
 439                 if (rc >= 0) {
 440                         /* Saw enough of a valid command to
 441                          * restart the timeout.
 442                          */
 443                         reset_cmd_timeout();
 444                 }
 445 #endif
 446                 len = readline (CFG_PROMPT);
 447
 448                 flag = 0;       /* assume no special flags for now */
 449                 if (len > 0)
 450                         strcpy (lastcommand, console_buffer);
 451                 else if (len == 0)
 452                         flag |= CMD_FLAG_REPEAT;
 453 #ifdef CONFIG_BOOT_RETRY_TIME
 454                 else if (len == -2) {
 455                         /* -2 means timed out, retry autoboot
 456                          */
 457                         puts ("\nTimed out waiting for command\n");
 458 # ifdef CONFIG_RESET_TO_RETRY
 459                         /* Reinit board to run initialization code again */
 460                         do_reset (NULL, 0, 0, NULL);
 461 # else
 462                         return;         /* retry autoboot */
 463 # endif
 464                 }
 465 #endif
 466
 467                 if (len == -1)
 468                         puts ("<INTERRUPT>\n");
 469                 else
 470                         rc = run_command (lastcommand, flag);
 471
 472                 if (rc <= 0) {
 473                         /* invalid command or not repeatable, forget it */
 474                         lastcommand[0] = 0;
 475                 }
 476         }
 477 #endif /*CFG_HUSH_PARSER*/
 478 }
 479
 480 #ifdef CONFIG_BOOT_RETRY_TIME
 481 /***************************************************************************
 482  * initialize command line timeout
 483  */
 484 void init_cmd_timeout(void)
 485 {
 486         char *s = getenv ("bootretry");
 487
 488         if (s != NULL)
 489                 retry_time = (int)simple_strtol(s, NULL, 10);
 490         else
 491                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 492
 493         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 494                 retry_time = CONFIG_BOOT_RETRY_MIN;
 495 }
 496
 497 /***************************************************************************
 498  * reset command line timeout to retry_time seconds
 499  */
 500 void reset_cmd_timeout(void)
 501 {
 502         endtime = endtick(retry_time);
 503 }
 504 #endif
 505
 506 #ifdef CONFIG_CMDLINE_EDITING
 507
 508 /*
 509  * cmdline-editing related codes from vivi.
 510  * Author: Janghoon Lyu <nandy@mizi.com>
 511  */
 512
 513 #define putnstr(str,n)  do {                    \
 514                 printf ("%.*s", n, str);        \
 515         } while (0)
 516
 517 #define CTL_CH(c)               ((c) - 'a' + 1)
 518
 519 #define MAX_CMDBUF_SIZE         256
 520
 521 #define CTL_BACKSPACE           ('\b')
 522 #define DEL                     ((char)255)
 523 #define DEL7                    ((char)127)
 524 #define CREAD_HIST_CHAR         ('!')
 525
 526 #define getcmd_putch(ch)        putc(ch)
 527 #define getcmd_getch()          getc()
 528 #define getcmd_cbeep()          getcmd_putch('\a')
 529
 530 #define HIST_MAX                20
 531 #define HIST_SIZE               MAX_CMDBUF_SIZE
 532
 533 static int hist_max = 0;
 534 static int hist_add_idx = 0;
 535 static int hist_cur = -1;
 536 unsigned hist_num = 0;
 537
 538 char* hist_list[HIST_MAX];
 539 char hist_lines[HIST_MAX][HIST_SIZE];
 540
 541 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 542
 543 static void hist_init(void)
 544 {
 545         int i;
 546
 547         hist_max = 0;
 548         hist_add_idx = 0;
 549         hist_cur = -1;
 550         hist_num = 0;
 551
 552         for (i = 0; i < HIST_MAX; i++) {
 553                 hist_list[i] = hist_lines[i];
 554                 hist_list[i][0] = '\0';
 555         }
 556 }
 557
 558 static void cread_add_to_hist(char *line)
 559 {
 560         strcpy(hist_list[hist_add_idx], line);
 561
 562         if (++hist_add_idx >= HIST_MAX)
 563                 hist_add_idx = 0;
 564
 565         if (hist_add_idx > hist_max)
 566                 hist_max = hist_add_idx;
 567
 568         hist_num++;
 569 }
 570
 571 static char* hist_prev(void)
 572 {
 573         char *ret;
 574         int old_cur;
 575
 576         if (hist_cur < 0)
 577                 return NULL;
 578
 579         old_cur = hist_cur;
 580         if (--hist_cur < 0)
 581                 hist_cur = hist_max;
 582
 583         if (hist_cur == hist_add_idx) {
 584                 hist_cur = old_cur;
 585                 ret = NULL;
 586         } else
 587                 ret = hist_list[hist_cur];
 588
 589         return (ret);
 590 }
 591
 592 static char* hist_next(void)
 593 {
 594         char *ret;
 595
 596         if (hist_cur < 0)
 597                 return NULL;
 598
 599         if (hist_cur == hist_add_idx)
 600                 return NULL;
 601
 602         if (++hist_cur > hist_max)
 603                 hist_cur = 0;
 604
 605         if (hist_cur == hist_add_idx) {
 606                 ret = "";
 607         } else
 608                 ret = hist_list[hist_cur];
 609
 610         return (ret);
 611 }
 612
 613 #ifndef CONFIG_CMDLINE_EDITING
 614 static void cread_print_hist_list(void)
 615 {
 616         int i;
 617         unsigned long n;
 618
 619         n = hist_num - hist_max;
 620
 621         i = hist_add_idx + 1;
 622         while (1) {
 623                 if (i > hist_max)
 624                         i = 0;
 625                 if (i == hist_add_idx)
 626                         break;
 627                 printf("%s\n", hist_list[i]);
 628                 n++;
 629                 i++;
 630         }
 631 }
 632 #endif /* CONFIG_CMDLINE_EDITING */
 633
 634 #define BEGINNING_OF_LINE() {                   \
 635         while (num) {                           \
 636                 getcmd_putch(CTL_BACKSPACE);    \
 637                 num--;                          \
 638         }                                       \
 639 }
 640
 641 #define ERASE_TO_EOL() {                                \
 642         if (num < eol_num) {                            \
 643                 int tmp;                                \
 644                 for (tmp = num; tmp < eol_num; tmp++)   \
 645                         getcmd_putch(' ');              \
 646                 while (tmp-- > num)                     \
 647                         getcmd_putch(CTL_BACKSPACE);    \
 648                 eol_num = num;                          \
 649         }                                               \
 650 }
 651
 652 #define REFRESH_TO_EOL() {                      \
 653         if (num < eol_num) {                    \
 654                 wlen = eol_num - num;           \
 655                 putnstr(buf + num, wlen);       \
 656                 num = eol_num;                  \
 657         }                                       \
 658 }
 659
 660 static void cread_add_char(char ichar, int insert, unsigned long *num,
 661                unsigned long *eol_num, char *buf, unsigned long len)
 662 {
 663         unsigned long wlen;
 664
 665         /* room ??? */
 666         if (insert || *num == *eol_num) {
 667                 if (*eol_num > len - 1) {
 668                         getcmd_cbeep();
 669                         return;
 670                 }
 671                 (*eol_num)++;
 672         }
 673
 674         if (insert) {
 675                 wlen = *eol_num - *num;
 676                 if (wlen > 1) {
 677                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 678                 }
 679
 680                 buf[*num] = ichar;
 681                 putnstr(buf + *num, wlen);
 682                 (*num)++;
 683                 while (--wlen) {
 684                         getcmd_putch(CTL_BACKSPACE);
 685                 }
 686         } else {
 687                 /* echo the character */
 688                 wlen = 1;
 689                 buf[*num] = ichar;
 690                 putnstr(buf + *num, wlen);
 691                 (*num)++;
 692         }
 693 }
 694
 695 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 696               unsigned long *eol_num, char *buf, unsigned long len)
 697 {
 698         while (strsize--) {
 699                 cread_add_char(*str, insert, num, eol_num, buf, len);
 700                 str++;
 701         }
 702 }
 703
 704 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
 705 {
 706         unsigned long num = 0;
 707         unsigned long eol_num = 0;
 708         unsigned long rlen;
 709         unsigned long wlen;
 710         char ichar;
 711         int insert = 1;
 712         int esc_len = 0;
 713         int rc = 0;
 714         char esc_save[8];
 715
 716         while (1) {
 717                 rlen = 1;
 718 #ifdef CONFIG_BOOT_RETRY_TIME
 719                 while (!tstc()) {       /* while no incoming data */
 720                         if (retry_time >= 0 && get_ticks() > endtime)
 721                                 return (-2);    /* timed out */
 722                 }
 723 #endif
 724
 725                 ichar = getcmd_getch();
 726
 727                 if ((ichar == '\n') || (ichar == '\r')) {
 728                         putc('\n');
 729                         break;
 730                 }
 731
 732                 /*
 733                  * handle standard linux xterm esc sequences for arrow key, etc.
 734                  */
 735                 if (esc_len != 0) {
 736                         if (esc_len == 1) {
 737                                 if (ichar == '[') {
 738                                         esc_save[esc_len] = ichar;
 739                                         esc_len = 2;
 740                                 } else {
 741                                         cread_add_str(esc_save, esc_len, insert,
 742                                                       &num, &eol_num, buf, *len);
 743                                         esc_len = 0;
 744                                 }
 745                                 continue;
 746                         }
 747
 748                         switch (ichar) {
 749
 750                         case 'D':       /* <- key */
 751                                 ichar = CTL_CH('b');
 752                                 esc_len = 0;
 753                                 break;
 754                         case 'C':       /* -> key */
 755                                 ichar = CTL_CH('f');
 756                                 esc_len = 0;
 757                                 break;  /* pass off to ^F handler */
 758                         case 'H':       /* Home key */
 759                                 ichar = CTL_CH('a');
 760                                 esc_len = 0;
 761                                 break;  /* pass off to ^A handler */
 762                         case 'A':       /* up arrow */
 763                                 ichar = CTL_CH('p');
 764                                 esc_len = 0;
 765                                 break;  /* pass off to ^P handler */
 766                         case 'B':       /* down arrow */
 767                                 ichar = CTL_CH('n');
 768                                 esc_len = 0;
 769                                 break;  /* pass off to ^N handler */
 770                         default:
 771                                 esc_save[esc_len++] = ichar;
 772                                 cread_add_str(esc_save, esc_len, insert,
 773                                               &num, &eol_num, buf, *len);
 774                                 esc_len = 0;
 775                                 continue;
 776                         }
 777                 }
 778
 779                 switch (ichar) {
 780                 case 0x1b:
 781                         if (esc_len == 0) {
 782                                 esc_save[esc_len] = ichar;
 783                                 esc_len = 1;
 784                         } else {
 785                                 puts("impossible condition #876\n");
 786                                 esc_len = 0;
 787                         }
 788                         break;
 789
 790                 case CTL_CH('a'):
 791                         BEGINNING_OF_LINE();
 792                         break;
 793                 case CTL_CH('c'):       /* ^C - break */
 794                         *buf = '\0';    /* discard input */
 795                         return (-1);
 796                 case CTL_CH('f'):
 797                         if (num < eol_num) {
 798                                 getcmd_putch(buf[num]);
 799                                 num++;
 800                         }
 801                         break;
 802                 case CTL_CH('b'):
 803                         if (num) {
 804                                 getcmd_putch(CTL_BACKSPACE);
 805                                 num--;
 806                         }
 807                         break;
 808                 case CTL_CH('d'):
 809                         if (num < eol_num) {
 810                                 wlen = eol_num - num - 1;
 811                                 if (wlen) {
 812                                         memmove(&buf[num], &buf[num+1], wlen);
 813                                         putnstr(buf + num, wlen);
 814                                 }
 815
 816                                 getcmd_putch(' ');
 817                                 do {
 818                                         getcmd_putch(CTL_BACKSPACE);
 819                                 } while (wlen--);
 820                                 eol_num--;
 821                         }
 822                         break;
 823                 case CTL_CH('k'):
 824                         ERASE_TO_EOL();
 825                         break;
 826                 case CTL_CH('e'):
 827                         REFRESH_TO_EOL();
 828                         break;
 829                 case CTL_CH('o'):
 830                         insert = !insert;
 831                         break;
 832                 case CTL_CH('x'):
 833                 case CTL_CH('u'):
 834                         BEGINNING_OF_LINE();
 835                         ERASE_TO_EOL();
 836                         break;
 837                 case DEL:
 838                 case DEL7:
 839                 case 8:
 840                         if (num) {
 841                                 wlen = eol_num - num;
 842                                 num--;
 843                                 memmove(&buf[num], &buf[num+1], wlen);
 844                                 getcmd_putch(CTL_BACKSPACE);
 845                                 putnstr(buf + num, wlen);
 846                                 getcmd_putch(' ');
 847                                 do {
 848                                         getcmd_putch(CTL_BACKSPACE);
 849                                 } while (wlen--);
 850                                 eol_num--;
 851                         }
 852                         break;
 853                 case CTL_CH('p'):
 854                 case CTL_CH('n'):
 855                 {
 856                         char * hline;
 857
 858                         esc_len = 0;
 859
 860                         if (ichar == CTL_CH('p'))
 861                                 hline = hist_prev();
 862                         else
 863                                 hline = hist_next();
 864
 865                         if (!hline) {
 866                                 getcmd_cbeep();
 867                                 continue;
 868                         }
 869
 870                         /* nuke the current line */
 871                         /* first, go home */
 872                         BEGINNING_OF_LINE();
 873
 874                         /* erase to end of line */
 875                         ERASE_TO_EOL();
 876
 877                         /* copy new line into place and display */
 878                         strcpy(buf, hline);
 879                         eol_num = strlen(buf);
 880                         REFRESH_TO_EOL();
 881                         continue;
 882                 }
 883 #ifdef CONFIG_AUTO_COMPLETE
 884                 case '\t': {
 885                         int num2, col;
 886
 887                         /* do not autocomplete when in the middle */
 888                         if (num < eol_num) {
 889                                 getcmd_cbeep();
 890                                 break;
 891                         }
 892
 893                         buf[num] = '\0';
 894                         col = strlen(prompt) + eol_num;
 895                         num2 = num;
 896                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 897                                 col = num2 - num;
 898                                 num += col;
 899                                 eol_num += col;
 900                         }
 901                         break;
 902                 }
 903 #endif
 904                 default:
 905                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 906                         break;
 907                 }
 908         }
 909         *len = eol_num;
 910         buf[eol_num] = '\0';    /* lose the newline */
 911
 912         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 913                 cread_add_to_hist(buf);
 914         hist_cur = hist_add_idx;
 915
 916         return (rc);
 917 }
 918
 919 #endif /* CONFIG_CMDLINE_EDITING */
 920
 921 /****************************************************************************/
 922
 923 /*
 924  * Prompt for input and read a line.
 925  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 926  * time out when time goes past endtime (timebase time in ticks).
 927  * Return:      number of read characters
 928  *              -1 if break
 929  *              -2 if timed out
 930  */
 931 int readline (const char *const prompt)
 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=MAX_CMDBUF_SIZE;
 942         int rc;
 943         static int initted = 0;
 944
 945         if (!initted) {
 946                 hist_init();
 947                 initted = 1;
 948         }
 949
 950         puts (prompt);
 951
 952         rc = cread_line(prompt, p, &len);
 953         return rc < 0 ? rc : len;
 954 #else
 955         char * p_buf = p;
 956         int     n = 0;                          /* buffer index         */
 957         int     plen = 0;                       /* prompt length        */
 958         int     col;                            /* output column cnt    */
 959         char    c;
 960
 961         /* print prompt */
 962         if (prompt) {
 963                 plen = strlen (prompt);
 964                 puts (prompt);
 965         }
 966         col = plen;
 967
 968         for (;;) {
 969 #ifdef CONFIG_BOOT_RETRY_TIME
 970                 while (!tstc()) {       /* while no incoming data */
 971                         if (retry_time >= 0 && get_ticks() > endtime)
 972                                 return (-2);    /* timed out */
 973                 }
 974 #endif
 975                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 976
 977 #ifdef CONFIG_SHOW_ACTIVITY
 978                 while (!tstc()) {
 979                         extern void show_activity(int arg);
 980                         show_activity(0);
 981                 }
 982 #endif
 983                 c = getc();
 984
 985                 /*
 986                  * Special character handling
 987                  */
 988                 switch (c) {
 989                 case '\r':                              /* Enter                */
 990                 case '\n':
 991                         *p = '\0';
 992                         puts ("\r\n");
 993                         return (p - p_buf);
 994
 995                 case '\0':                              /* nul                  */
 996                         continue;
 997
 998                 case 0x03:                              /* ^C - break           */
 999                         p_buf[0] = '\0';        /* discard input */
1000                         return (-1);
1001
1002                 case 0x15:                              /* ^U - erase line      */
1003                         while (col > plen) {
1004                                 puts (erase_seq);
1005                                 --col;
1006                         }
1007                         p = p_buf;
1008                         n = 0;
1009                         continue;
1010
1011                 case 0x17:                              /* ^W - erase word      */
1012                         p=delete_char(p_buf, p, &col, &n, plen);
1013                         while ((n > 0) && (*p != ' ')) {
1014                                 p=delete_char(p_buf, p, &col, &n, plen);
1015                         }
1016                         continue;
1017
1018                 case 0x08:                              /* ^H  - backspace      */
1019                 case 0x7F:                              /* DEL - backspace      */
1020                         p=delete_char(p_buf, p, &col, &n, plen);
1021                         continue;
1022
1023                 default:
1024                         /*
1025                          * Must be a normal character then
1026                          */
1027                         if (n < CFG_CBSIZE-2) {
1028                                 if (c == '\t') {        /* expand TABs          */
1029 #ifdef CONFIG_AUTO_COMPLETE
1030                                         /* if auto completion triggered just continue */
1031                                         *p = '\0';
1032                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1033                                                 p = p_buf + n;  /* reset */
1034                                                 continue;
1035                                         }
1036 #endif
1037                                         puts (tab_seq+(col&07));
1038                                         col += 8 - (col&07);
1039                                 } else {
1040                                         ++col;          /* echo input           */
1041                                         putc (c);
1042                                 }
1043                                 *p++ = c;
1044                                 ++n;
1045                         } else {                        /* Buffer full          */
1046                                 putc ('\a');
1047                         }
1048                 }
1049         }
1050 #endif /* CONFIG_CMDLINE_EDITING */
1051 }
1052
1053 /****************************************************************************/
1054
1055 #ifndef CONFIG_CMDLINE_EDITING
1056 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1057 {
1058         char *s;
1059
1060         if (*np == 0) {
1061                 return (p);
1062         }
1063
1064         if (*(--p) == '\t') {                   /* will retype the whole line   */
1065                 while (*colp > plen) {
1066                         puts (erase_seq);
1067                         (*colp)--;
1068                 }
1069                 for (s=buffer; s<p; ++s) {
1070                         if (*s == '\t') {
1071                                 puts (tab_seq+((*colp) & 07));
1072                                 *colp += 8 - ((*colp) & 07);
1073                         } else {
1074                                 ++(*colp);
1075                                 putc (*s);
1076                         }
1077                 }
1078         } else {
1079                 puts (erase_seq);
1080                 (*colp)--;
1081         }
1082         (*np)--;
1083         return (p);
1084 }
1085 #endif /* CONFIG_CMDLINE_EDITING */
1086
1087 /****************************************************************************/
1088
1089 int parse_line (char *line, char *argv[])
1090 {
1091         int nargs = 0;
1092
1093 #ifdef DEBUG_PARSER
1094         printf ("parse_line: \"%s\"\n", line);
1095 #endif
1096         while (nargs < CFG_MAXARGS) {
1097
1098                 /* skip any white space */
1099                 while ((*line == ' ') || (*line == '\t')) {
1100                         ++line;
1101                 }
1102
1103                 if (*line == '\0') {    /* end of line, no more args    */
1104                         argv[nargs] = NULL;
1105 #ifdef DEBUG_PARSER
1106                 printf ("parse_line: nargs=%d\n", nargs);
1107 #endif
1108                         return (nargs);
1109                 }
1110
1111                 argv[nargs++] = line;   /* begin of argument string     */
1112
1113                 /* find end of string */
1114                 while (*line && (*line != ' ') && (*line != '\t')) {
1115                         ++line;
1116                 }
1117
1118                 if (*line == '\0') {    /* end of line, no more args    */
1119                         argv[nargs] = NULL;
1120 #ifdef DEBUG_PARSER
1121                 printf ("parse_line: nargs=%d\n", nargs);
1122 #endif
1123                         return (nargs);
1124                 }
1125
1126                 *line++ = '\0';         /* terminate current arg         */
1127         }
1128
1129         printf ("** Too many args (max. %d) **\n", CFG_MAXARGS);
1130
1131 #ifdef DEBUG_PARSER
1132         printf ("parse_line: nargs=%d\n", nargs);
1133 #endif
1134         return (nargs);
1135 }
1136
1137 /****************************************************************************/
1138
1139 static void process_macros (const char *input, char *output)
1140 {
1141         char c, prev;
1142         const char *varname_start = NULL;
1143         int inputcnt = strlen (input);
1144         int outputcnt = CFG_CBSIZE;
1145         int state = 0;          /* 0 = waiting for '$'  */
1146
1147         /* 1 = waiting for '(' or '{' */
1148         /* 2 = waiting for ')' or '}' */
1149         /* 3 = waiting for '''  */
1150 #ifdef DEBUG_PARSER
1151         char *output_start = output;
1152
1153         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1154                 input);
1155 #endif
1156
1157         prev = '\0';            /* previous character   */
1158
1159         while (inputcnt && outputcnt) {
1160                 c = *input++;
1161                 inputcnt--;
1162
1163                 if (state != 3) {
1164                         /* remove one level of escape characters */
1165                         if ((c == '\\') && (prev != '\\')) {
1166                                 if (inputcnt-- == 0)
1167                                         break;
1168                                 prev = c;
1169                                 c = *input++;
1170                         }
1171                 }
1172
1173                 switch (state) {
1174                 case 0: /* Waiting for (unescaped) $    */
1175                         if ((c == '\'') && (prev != '\\')) {
1176                                 state = 3;
1177                                 break;
1178                         }
1179                         if ((c == '$') && (prev != '\\')) {
1180                                 state++;
1181                         } else {
1182                                 *(output++) = c;
1183                                 outputcnt--;
1184                         }
1185                         break;
1186                 case 1: /* Waiting for (        */
1187                         if (c == '(' || c == '{') {
1188                                 state++;
1189                                 varname_start = input;
1190                         } else {
1191                                 state = 0;
1192                                 *(output++) = '$';
1193                                 outputcnt--;
1194
1195                                 if (outputcnt) {
1196                                         *(output++) = c;
1197                                         outputcnt--;
1198                                 }
1199                         }
1200                         break;
1201                 case 2: /* Waiting for )        */
1202                         if (c == ')' || c == '}') {
1203                                 int i;
1204                                 char envname[CFG_CBSIZE], *envval;
1205                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1206
1207                                 /* Get the varname */
1208                                 for (i = 0; i < envcnt; i++) {
1209                                         envname[i] = varname_start[i];
1210                                 }
1211                                 envname[i] = 0;
1212
1213                                 /* Get its value */
1214                                 envval = getenv (envname);
1215
1216                                 /* Copy into the line if it exists */
1217                                 if (envval != NULL)
1218                                         while ((*envval) && outputcnt) {
1219                                                 *(output++) = *(envval++);
1220                                                 outputcnt--;
1221                                         }
1222                                 /* Look for another '$' */
1223                                 state = 0;
1224                         }
1225                         break;
1226                 case 3: /* Waiting for '        */
1227                         if ((c == '\'') && (prev != '\\')) {
1228                                 state = 0;
1229                         } else {
1230                                 *(output++) = c;
1231                                 outputcnt--;
1232                         }
1233                         break;
1234                 }
1235                 prev = c;
1236         }
1237
1238         if (outputcnt)
1239                 *output = 0;
1240         else
1241                 *(output - 1) = 0;
1242
1243 #ifdef DEBUG_PARSER
1244         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1245                 strlen (output_start), output_start);
1246 #endif
1247 }
1248
1249 /****************************************************************************
1250  * returns:
1251  *      1  - command executed, repeatable
1252  *      0  - command executed but not repeatable, interrupted commands are
1253  *           always considered not repeatable
1254  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1255  *           (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is
1256  *           considered unrecognized)
1257  *
1258  * WARNING:
1259  *
1260  * We must create a temporary copy of the command since the command we get
1261  * may be the result from getenv(), which returns a pointer directly to
1262  * the environment data, which may change magicly when the command we run
1263  * creates or modifies environment variables (like "bootp" does).
1264  */
1265
1266 int run_command (const char *cmd, int flag)
1267 {
1268         cmd_tbl_t *cmdtp;
1269         char cmdbuf[CFG_CBSIZE];        /* working copy of cmd          */
1270         char *token;                    /* start of token in cmdbuf     */
1271         char *sep;                      /* end of token (separator) in cmdbuf */
1272         char finaltoken[CFG_CBSIZE];
1273         char *str = cmdbuf;
1274         char *argv[CFG_MAXARGS + 1];    /* NULL terminated      */
1275         int argc, inquotes;
1276         int repeatable = 1;
1277         int rc = 0;
1278
1279 #ifdef DEBUG_PARSER
1280         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1281         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1282         puts ("\"\n");
1283 #endif
1284
1285         clear_ctrlc();          /* forget any previous Control C */
1286
1287         if (!cmd || !*cmd) {
1288                 return -1;      /* empty command */
1289         }
1290
1291         if (strlen(cmd) >= CFG_CBSIZE) {
1292                 puts ("## Command too long!\n");
1293                 return -1;
1294         }
1295
1296         strcpy (cmdbuf, cmd);
1297
1298         /* Process separators and check for invalid
1299          * repeatable commands
1300          */
1301
1302 #ifdef DEBUG_PARSER
1303         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1304 #endif
1305         while (*str) {
1306
1307                 /*
1308                  * Find separator, or string end
1309                  * Allow simple escape of ';' by writing "\;"
1310                  */
1311                 for (inquotes = 0, sep = str; *sep; sep++) {
1312                         if ((*sep=='\'') &&
1313                             (*(sep-1) != '\\'))
1314                                 inquotes=!inquotes;
1315
1316                         if (!inquotes &&
1317                             (*sep == ';') &&    /* separator            */
1318                             ( sep != str) &&    /* past string start    */
1319                             (*(sep-1) != '\\')) /* and NOT escaped      */
1320                                 break;
1321                 }
1322
1323                 /*
1324                  * Limit the token to data between separators
1325                  */
1326                 token = str;
1327                 if (*sep) {
1328                         str = sep + 1;  /* start of command for next pass */
1329                         *sep = '\0';
1330                 }
1331                 else
1332                         str = sep;      /* no more commands for next pass */
1333 #ifdef DEBUG_PARSER
1334                 printf ("token: \"%s\"\n", token);
1335 #endif
1336
1337                 /* find macros in this token and replace them */
1338                 process_macros (token, finaltoken);
1339
1340                 /* Extract arguments */
1341                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1342                         rc = -1;        /* no command at all */
1343                         continue;
1344                 }
1345
1346                 /* Look up command in command table */
1347                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1348                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1349                         rc = -1;        /* give up after bad command */
1350                         continue;
1351                 }
1352
1353                 /* found - check max args */
1354                 if (argc > cmdtp->maxargs) {
1355                         printf ("Usage:\n%s\n", cmdtp->usage);
1356                         rc = -1;
1357                         continue;
1358                 }
1359
1360 #if defined(CONFIG_CMD_BOOTD)
1361                 /* avoid "bootd" recursion */
1362                 if (cmdtp->cmd == do_bootd) {
1363 #ifdef DEBUG_PARSER
1364                         printf ("[%s]\n", finaltoken);
1365 #endif
1366                         if (flag & CMD_FLAG_BOOTD) {
1367                                 puts ("'bootd' recursion detected\n");
1368                                 rc = -1;
1369                                 continue;
1370                         } else {
1371                                 flag |= CMD_FLAG_BOOTD;
1372                         }
1373                 }
1374 #endif
1375
1376                 /* OK - call function to do the command */
1377                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1378                         rc = -1;
1379                 }
1380
1381                 repeatable &= cmdtp->repeatable;
1382
1383                 /* Did the user stop this? */
1384                 if (had_ctrlc ())
1385                         return -1;      /* if stopped then not repeatable */
1386         }
1387
1388         return rc ? rc : repeatable;
1389 }
1390
1391 /****************************************************************************/
1392
1393 #if defined(CONFIG_CMD_RUN)
1394 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1395 {
1396         int i;
1397
1398         if (argc < 2) {
1399                 printf ("Usage:\n%s\n", cmdtp->usage);
1400                 return 1;
1401         }
1402
1403         for (i=1; i<argc; ++i) {
1404                 char *arg;
1405
1406                 if ((arg = getenv (argv[i])) == NULL) {
1407                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1408                         return 1;
1409                 }
1410 #ifndef CFG_HUSH_PARSER
1411                 if (run_command (arg, flag) == -1)
1412                         return 1;
1413 #else
1414                 if (parse_string_outer(arg,
1415                     FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1416                         return 1;
1417 #endif
1418         }
1419         return 0;
1420 }
1421 #endif