common/main.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Add to readline cmdline-editing by
   6  * (C) Copyright 2005
   7  * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /* #define      DEBUG   */
  29
  30 #include <common.h>
  31 #include <watchdog.h>
  32 #include <command.h>
  33 #include <version.h>
  34 #ifdef CONFIG_MODEM_SUPPORT
  35 #include <malloc.h>             /* for free() prototype */
  36 #endif
  37
  38 #ifdef CONFIG_SYS_HUSH_PARSER
  39 #include <hush.h>
  40 #endif
  41
  42 #include <post.h>
  43 #include <linux/ctype.h>
  44
  45 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
  46 DECLARE_GLOBAL_DATA_PTR;
  47 #endif
  48
  49 /*
  50  * Board-specific Platform code can reimplement show_boot_progress () if needed
  51  */
  52 void inline __show_boot_progress (int val) {}
  53 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  54
  55 #if defined(CONFIG_UPDATE_TFTP)
  56 int update_tftp (ulong addr);
  57 #endif /* CONFIG_UPDATE_TFTP */
  58
  59 #define MAX_DELAY_STOP_STR 32
  60
  61 #undef DEBUG_PARSER
  62
  63 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
  64
  65 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  66 static const char erase_seq[] = "\b \b";                /* erase sequence       */
  67 static const char   tab_seq[] = "        ";             /* used to expand TABs  */
  68
  69 #ifdef CONFIG_BOOT_RETRY_TIME
  70 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  71 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  72 #endif
  73
  74 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  75
  76 #ifndef CONFIG_BOOT_RETRY_MIN
  77 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  78 #endif
  79
  80 #ifdef CONFIG_MODEM_SUPPORT
  81 int do_mdm_init = 0;
  82 extern void mdm_init(void); /* defined in board.c */
  83 #endif
  84
  85 /***************************************************************************
  86  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  87  * returns: 0 -  no key string, allow autoboot 1 - got key string, abort
  88  */
  89 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  90 # if defined(CONFIG_AUTOBOOT_KEYED)
  91 #ifndef CONFIG_MENU
  92 static inline
  93 #endif
  94 int abortboot(int bootdelay)
  95 {
  96         int abort = 0;
  97         uint64_t etime = endtick(bootdelay);
  98         struct {
  99                 char* str;
 100                 u_int len;
 101                 int retry;
 102         }
 103         delaykey [] = {
 104                 { str: getenv ("bootdelaykey"),  retry: 1 },
 105                 { str: getenv ("bootdelaykey2"), retry: 1 },
 106                 { str: getenv ("bootstopkey"),   retry: 0 },
 107                 { str: getenv ("bootstopkey2"),  retry: 0 },
 108         };
 109
 110         char presskey [MAX_DELAY_STOP_STR];
 111         u_int presskey_len = 0;
 112         u_int presskey_max = 0;
 113         u_int i;
 114
 115 #  ifdef CONFIG_AUTOBOOT_PROMPT
 116         printf(CONFIG_AUTOBOOT_PROMPT);
 117 #  endif
 118
 119 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 120         if (delaykey[0].str == NULL)
 121                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 122 #  endif
 123 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 124         if (delaykey[1].str == NULL)
 125                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 126 #  endif
 127 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 128         if (delaykey[2].str == NULL)
 129                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 130 #  endif
 131 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 132         if (delaykey[3].str == NULL)
 133                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 134 #  endif
 135
 136         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 137                 delaykey[i].len = delaykey[i].str == NULL ?
 138                                     0 : strlen (delaykey[i].str);
 139                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 140                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 141
 142                 presskey_max = presskey_max > delaykey[i].len ?
 143                                     presskey_max : delaykey[i].len;
 144
 145 #  if DEBUG_BOOTKEYS
 146                 printf("%s key:<%s>\n",
 147                        delaykey[i].retry ? "delay" : "stop",
 148                        delaykey[i].str ? delaykey[i].str : "NULL");
 149 #  endif
 150         }
 151
 152         /* In order to keep up with incoming data, check timeout only
 153          * when catch up.
 154          */
 155         do {
 156                 if (tstc()) {
 157                         if (presskey_len < presskey_max) {
 158                                 presskey [presskey_len ++] = getc();
 159                         }
 160                         else {
 161                                 for (i = 0; i < presskey_max - 1; i ++)
 162                                         presskey [i] = presskey [i + 1];
 163
 164                                 presskey [i] = getc();
 165                         }
 166                 }
 167
 168                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 169                         if (delaykey[i].len > 0 &&
 170                             presskey_len >= delaykey[i].len &&
 171                             memcmp (presskey + presskey_len - delaykey[i].len,
 172                                     delaykey[i].str,
 173                                     delaykey[i].len) == 0) {
 174 #  if DEBUG_BOOTKEYS
 175                                 printf("got %skey\n",
 176                                        delaykey[i].retry ? "delay" : "stop");
 177 #  endif
 178
 179 #  ifdef CONFIG_BOOT_RETRY_TIME
 180                                 /* don't retry auto boot */
 181                                 if (! delaykey[i].retry)
 182                                         retry_time = -1;
 183 #  endif
 184                                 abort = 1;
 185                         }
 186                 }
 187         } while (!abort && get_ticks() <= etime);
 188
 189 #  if DEBUG_BOOTKEYS
 190         if (!abort)
 191                 puts("key timeout\n");
 192 #  endif
 193
 194 #ifdef CONFIG_SILENT_CONSOLE
 195         if (abort)
 196                 gd->flags &= ~GD_FLG_SILENT;
 197 #endif
 198
 199         return abort;
 200 }
 201
 202 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 203
 204 #ifdef CONFIG_MENUKEY
 205 static int menukey = 0;
 206 #endif
 207
 208 #ifndef CONFIG_MENU
 209 static inline
 210 #endif
 211 int abortboot(int bootdelay)
 212 {
 213         int abort = 0;
 214
 215 #ifdef CONFIG_MENUPROMPT
 216         printf(CONFIG_MENUPROMPT);
 217 #else
 218         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 219 #endif
 220
 221 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 222         /*
 223          * Check if key already pressed
 224          * Don't check if bootdelay < 0
 225          */
 226         if (bootdelay >= 0) {
 227                 if (tstc()) {   /* we got a key press   */
 228                         (void) getc();  /* consume input        */
 229                         puts ("\b\b\b 0");
 230                         abort = 1;      /* don't auto boot      */
 231                 }
 232         }
 233 #endif
 234
 235         while ((bootdelay > 0) && (!abort)) {
 236                 int i;
 237
 238                 --bootdelay;
 239                 /* delay 100 * 10ms */
 240                 for (i=0; !abort && i<100; ++i) {
 241                         if (tstc()) {   /* we got a key press   */
 242                                 abort  = 1;     /* don't auto boot      */
 243                                 bootdelay = 0;  /* no more delay        */
 244 # ifdef CONFIG_MENUKEY
 245                                 menukey = getc();
 246 # else
 247                                 (void) getc();  /* consume input        */
 248 # endif
 249                                 break;
 250                         }
 251                         udelay(10000);
 252                 }
 253
 254                 printf("\b\b\b%2d ", bootdelay);
 255         }
 256
 257         putc('\n');
 258
 259 #ifdef CONFIG_SILENT_CONSOLE
 260         if (abort)
 261                 gd->flags &= ~GD_FLG_SILENT;
 262 #endif
 263
 264         return abort;
 265 }
 266 # endif /* CONFIG_AUTOBOOT_KEYED */
 267 #endif  /* CONFIG_BOOTDELAY >= 0  */
 268
 269 /*
 270  * Return 0 on success, or != 0 on error.
 271  */
 272 #ifndef CONFIG_CMD_PXE
 273 static inline
 274 #endif
 275 int run_command2(const char *cmd, int flag)
 276 {
 277 #ifndef CONFIG_SYS_HUSH_PARSER
 278         /*
 279          * run_command can return 0 or 1 for success, so clean up its result.
 280          */
 281         if (run_command(cmd, flag) == -1)
 282                 return 1;
 283
 284         return 0;
 285 #else
 286         return parse_string_outer(cmd,
 287                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
 288 #endif
 289 }
 290
 291 /****************************************************************************/
 292
 293 void main_loop (void)
 294 {
 295 #ifndef CONFIG_SYS_HUSH_PARSER
 296         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
 297         int len;
 298         int rc = 1;
 299         int flag;
 300 #endif
 301
 302 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 303         char *s;
 304         int bootdelay;
 305 #endif
 306 #ifdef CONFIG_PREBOOT
 307         char *p;
 308 #endif
 309 #ifdef CONFIG_BOOTCOUNT_LIMIT
 310         unsigned long bootcount = 0;
 311         unsigned long bootlimit = 0;
 312         char *bcs;
 313         char bcs_set[16];
 314 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 315
 316 #ifdef CONFIG_BOOTCOUNT_LIMIT
 317         bootcount = bootcount_load();
 318         bootcount++;
 319         bootcount_store (bootcount);
 320         sprintf (bcs_set, "%lu", bootcount);
 321         setenv ("bootcount", bcs_set);
 322         bcs = getenv ("bootlimit");
 323         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 324 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 325
 326 #ifdef CONFIG_MODEM_SUPPORT
 327         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 328         if (do_mdm_init) {
 329                 char *str = strdup(getenv("mdm_cmd"));
 330                 setenv ("preboot", str);  /* set or delete definition */
 331                 if (str != NULL)
 332                         free (str);
 333                 mdm_init(); /* wait for modem connection */
 334         }
 335 #endif  /* CONFIG_MODEM_SUPPORT */
 336
 337 #ifdef CONFIG_VERSION_VARIABLE
 338         {
 339                 setenv ("ver", version_string);  /* set version variable */
 340         }
 341 #endif /* CONFIG_VERSION_VARIABLE */
 342
 343 #ifdef CONFIG_SYS_HUSH_PARSER
 344         u_boot_hush_start ();
 345 #endif
 346
 347 #if defined(CONFIG_HUSH_INIT_VAR)
 348         hush_init_var ();
 349 #endif
 350
 351 #ifdef CONFIG_PREBOOT
 352         if ((p = getenv ("preboot")) != NULL) {
 353 # ifdef CONFIG_AUTOBOOT_KEYED
 354                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 355 # endif
 356
 357                 run_command2(p, 0);
 358
 359 # ifdef CONFIG_AUTOBOOT_KEYED
 360                 disable_ctrlc(prev);    /* restore Control C checking */
 361 # endif
 362         }
 363 #endif /* CONFIG_PREBOOT */
 364
 365 #if defined(CONFIG_UPDATE_TFTP)
 366         update_tftp (0UL);
 367 #endif /* CONFIG_UPDATE_TFTP */
 368
 369 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 370         s = getenv ("bootdelay");
 371         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 372
 373         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 374
 375 # ifdef CONFIG_BOOT_RETRY_TIME
 376         init_cmd_timeout ();
 377 # endif /* CONFIG_BOOT_RETRY_TIME */
 378
 379 #ifdef CONFIG_POST
 380         if (gd->flags & GD_FLG_POSTFAIL) {
 381                 s = getenv("failbootcmd");
 382         }
 383         else
 384 #endif /* CONFIG_POST */
 385 #ifdef CONFIG_BOOTCOUNT_LIMIT
 386         if (bootlimit && (bootcount > bootlimit)) {
 387                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 388                         (unsigned)bootlimit);
 389                 s = getenv ("altbootcmd");
 390         }
 391         else
 392 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 393                 s = getenv ("bootcmd");
 394
 395         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 396
 397         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 398 # ifdef CONFIG_AUTOBOOT_KEYED
 399                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 400 # endif
 401
 402                 run_command2(s, 0);
 403
 404 # ifdef CONFIG_AUTOBOOT_KEYED
 405                 disable_ctrlc(prev);    /* restore Control C checking */
 406 # endif
 407         }
 408
 409 # ifdef CONFIG_MENUKEY
 410         if (menukey == CONFIG_MENUKEY) {
 411                 s = getenv("menucmd");
 412                 if (s)
 413                         run_command2(s, 0);
 414         }
 415 #endif /* CONFIG_MENUKEY */
 416 #endif /* CONFIG_BOOTDELAY */
 417
 418         /*
 419          * Main Loop for Monitor Command Processing
 420          */
 421 #ifdef CONFIG_SYS_HUSH_PARSER
 422         parse_file_outer();
 423         /* This point is never reached */
 424         for (;;);
 425 #else
 426         for (;;) {
 427 #ifdef CONFIG_BOOT_RETRY_TIME
 428                 if (rc >= 0) {
 429                         /* Saw enough of a valid command to
 430                          * restart the timeout.
 431                          */
 432                         reset_cmd_timeout();
 433                 }
 434 #endif
 435                 len = readline (CONFIG_SYS_PROMPT);
 436
 437                 flag = 0;       /* assume no special flags for now */
 438                 if (len > 0)
 439                         strcpy (lastcommand, console_buffer);
 440                 else if (len == 0)
 441                         flag |= CMD_FLAG_REPEAT;
 442 #ifdef CONFIG_BOOT_RETRY_TIME
 443                 else if (len == -2) {
 444                         /* -2 means timed out, retry autoboot
 445                          */
 446                         puts ("\nTimed out waiting for command\n");
 447 # ifdef CONFIG_RESET_TO_RETRY
 448                         /* Reinit board to run initialization code again */
 449                         do_reset (NULL, 0, 0, NULL);
 450 # else
 451                         return;         /* retry autoboot */
 452 # endif
 453                 }
 454 #endif
 455
 456                 if (len == -1)
 457                         puts ("<INTERRUPT>\n");
 458                 else
 459                         rc = run_command (lastcommand, flag);
 460
 461                 if (rc <= 0) {
 462                         /* invalid command or not repeatable, forget it */
 463                         lastcommand[0] = 0;
 464                 }
 465         }
 466 #endif /*CONFIG_SYS_HUSH_PARSER*/
 467 }
 468
 469 #ifdef CONFIG_BOOT_RETRY_TIME
 470 /***************************************************************************
 471  * initialize command line timeout
 472  */
 473 void init_cmd_timeout(void)
 474 {
 475         char *s = getenv ("bootretry");
 476
 477         if (s != NULL)
 478                 retry_time = (int)simple_strtol(s, NULL, 10);
 479         else
 480                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 481
 482         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 483                 retry_time = CONFIG_BOOT_RETRY_MIN;
 484 }
 485
 486 /***************************************************************************
 487  * reset command line timeout to retry_time seconds
 488  */
 489 void reset_cmd_timeout(void)
 490 {
 491         endtime = endtick(retry_time);
 492 }
 493 #endif
 494
 495 #ifdef CONFIG_CMDLINE_EDITING
 496
 497 /*
 498  * cmdline-editing related codes from vivi.
 499  * Author: Janghoon Lyu <nandy@mizi.com>
 500  */
 501
 502 #define putnstr(str,n)  do {                    \
 503                 printf ("%.*s", (int)n, str);   \
 504         } while (0)
 505
 506 #define CTL_CH(c)               ((c) - 'a' + 1)
 507 #define CTL_BACKSPACE           ('\b')
 508 #define DEL                     ((char)255)
 509 #define DEL7                    ((char)127)
 510 #define CREAD_HIST_CHAR         ('!')
 511
 512 #define getcmd_putch(ch)        putc(ch)
 513 #define getcmd_getch()          getc()
 514 #define getcmd_cbeep()          getcmd_putch('\a')
 515
 516 #define HIST_MAX                20
 517 #define HIST_SIZE               CONFIG_SYS_CBSIZE
 518
 519 static int hist_max = 0;
 520 static int hist_add_idx = 0;
 521 static int hist_cur = -1;
 522 unsigned hist_num = 0;
 523
 524 char* hist_list[HIST_MAX];
 525 char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
 526
 527 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 528
 529 static void hist_init(void)
 530 {
 531         int i;
 532
 533         hist_max = 0;
 534         hist_add_idx = 0;
 535         hist_cur = -1;
 536         hist_num = 0;
 537
 538         for (i = 0; i < HIST_MAX; i++) {
 539                 hist_list[i] = hist_lines[i];
 540                 hist_list[i][0] = '\0';
 541         }
 542 }
 543
 544 static void cread_add_to_hist(char *line)
 545 {
 546         strcpy(hist_list[hist_add_idx], line);
 547
 548         if (++hist_add_idx >= HIST_MAX)
 549                 hist_add_idx = 0;
 550
 551         if (hist_add_idx > hist_max)
 552                 hist_max = hist_add_idx;
 553
 554         hist_num++;
 555 }
 556
 557 static char* hist_prev(void)
 558 {
 559         char *ret;
 560         int old_cur;
 561
 562         if (hist_cur < 0)
 563                 return NULL;
 564
 565         old_cur = hist_cur;
 566         if (--hist_cur < 0)
 567                 hist_cur = hist_max;
 568
 569         if (hist_cur == hist_add_idx) {
 570                 hist_cur = old_cur;
 571                 ret = NULL;
 572         } else
 573                 ret = hist_list[hist_cur];
 574
 575         return (ret);
 576 }
 577
 578 static char* hist_next(void)
 579 {
 580         char *ret;
 581
 582         if (hist_cur < 0)
 583                 return NULL;
 584
 585         if (hist_cur == hist_add_idx)
 586                 return NULL;
 587
 588         if (++hist_cur > hist_max)
 589                 hist_cur = 0;
 590
 591         if (hist_cur == hist_add_idx) {
 592                 ret = "";
 593         } else
 594                 ret = hist_list[hist_cur];
 595
 596         return (ret);
 597 }
 598
 599 #ifndef CONFIG_CMDLINE_EDITING
 600 static void cread_print_hist_list(void)
 601 {
 602         int i;
 603         unsigned long n;
 604
 605         n = hist_num - hist_max;
 606
 607         i = hist_add_idx + 1;
 608         while (1) {
 609                 if (i > hist_max)
 610                         i = 0;
 611                 if (i == hist_add_idx)
 612                         break;
 613                 printf("%s\n", hist_list[i]);
 614                 n++;
 615                 i++;
 616         }
 617 }
 618 #endif /* CONFIG_CMDLINE_EDITING */
 619
 620 #define BEGINNING_OF_LINE() {                   \
 621         while (num) {                           \
 622                 getcmd_putch(CTL_BACKSPACE);    \
 623                 num--;                          \
 624         }                                       \
 625 }
 626
 627 #define ERASE_TO_EOL() {                                \
 628         if (num < eol_num) {                            \
 629                 printf("%*s", (int)(eol_num - num), ""); \
 630                 do {                                    \
 631                         getcmd_putch(CTL_BACKSPACE);    \
 632                 } while (--eol_num > num);              \
 633         }                                               \
 634 }
 635
 636 #define REFRESH_TO_EOL() {                      \
 637         if (num < eol_num) {                    \
 638                 wlen = eol_num - num;           \
 639                 putnstr(buf + num, wlen);       \
 640                 num = eol_num;                  \
 641         }                                       \
 642 }
 643
 644 static void cread_add_char(char ichar, int insert, unsigned long *num,
 645                unsigned long *eol_num, char *buf, unsigned long len)
 646 {
 647         unsigned long wlen;
 648
 649         /* room ??? */
 650         if (insert || *num == *eol_num) {
 651                 if (*eol_num > len - 1) {
 652                         getcmd_cbeep();
 653                         return;
 654                 }
 655                 (*eol_num)++;
 656         }
 657
 658         if (insert) {
 659                 wlen = *eol_num - *num;
 660                 if (wlen > 1) {
 661                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 662                 }
 663
 664                 buf[*num] = ichar;
 665                 putnstr(buf + *num, wlen);
 666                 (*num)++;
 667                 while (--wlen) {
 668                         getcmd_putch(CTL_BACKSPACE);
 669                 }
 670         } else {
 671                 /* echo the character */
 672                 wlen = 1;
 673                 buf[*num] = ichar;
 674                 putnstr(buf + *num, wlen);
 675                 (*num)++;
 676         }
 677 }
 678
 679 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 680               unsigned long *eol_num, char *buf, unsigned long len)
 681 {
 682         while (strsize--) {
 683                 cread_add_char(*str, insert, num, eol_num, buf, len);
 684                 str++;
 685         }
 686 }
 687
 688 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
 689 {
 690         unsigned long num = 0;
 691         unsigned long eol_num = 0;
 692         unsigned long wlen;
 693         char ichar;
 694         int insert = 1;
 695         int esc_len = 0;
 696         char esc_save[8];
 697         int init_len = strlen(buf);
 698
 699         if (init_len)
 700                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
 701
 702         while (1) {
 703 #ifdef CONFIG_BOOT_RETRY_TIME
 704                 while (!tstc()) {       /* while no incoming data */
 705                         if (retry_time >= 0 && get_ticks() > endtime)
 706                                 return (-2);    /* timed out */
 707                         WATCHDOG_RESET();
 708                 }
 709 #endif
 710
 711                 ichar = getcmd_getch();
 712
 713                 if ((ichar == '\n') || (ichar == '\r')) {
 714                         putc('\n');
 715                         break;
 716                 }
 717
 718                 /*
 719                  * handle standard linux xterm esc sequences for arrow key, etc.
 720                  */
 721                 if (esc_len != 0) {
 722                         if (esc_len == 1) {
 723                                 if (ichar == '[') {
 724                                         esc_save[esc_len] = ichar;
 725                                         esc_len = 2;
 726                                 } else {
 727                                         cread_add_str(esc_save, esc_len, insert,
 728                                                       &num, &eol_num, buf, *len);
 729                                         esc_len = 0;
 730                                 }
 731                                 continue;
 732                         }
 733
 734                         switch (ichar) {
 735
 736                         case 'D':       /* <- key */
 737                                 ichar = CTL_CH('b');
 738                                 esc_len = 0;
 739                                 break;
 740                         case 'C':       /* -> key */
 741                                 ichar = CTL_CH('f');
 742                                 esc_len = 0;
 743                                 break;  /* pass off to ^F handler */
 744                         case 'H':       /* Home key */
 745                                 ichar = CTL_CH('a');
 746                                 esc_len = 0;
 747                                 break;  /* pass off to ^A handler */
 748                         case 'A':       /* up arrow */
 749                                 ichar = CTL_CH('p');
 750                                 esc_len = 0;
 751                                 break;  /* pass off to ^P handler */
 752                         case 'B':       /* down arrow */
 753                                 ichar = CTL_CH('n');
 754                                 esc_len = 0;
 755                                 break;  /* pass off to ^N handler */
 756                         default:
 757                                 esc_save[esc_len++] = ichar;
 758                                 cread_add_str(esc_save, esc_len, insert,
 759                                               &num, &eol_num, buf, *len);
 760                                 esc_len = 0;
 761                                 continue;
 762                         }
 763                 }
 764
 765                 switch (ichar) {
 766                 case 0x1b:
 767                         if (esc_len == 0) {
 768                                 esc_save[esc_len] = ichar;
 769                                 esc_len = 1;
 770                         } else {
 771                                 puts("impossible condition #876\n");
 772                                 esc_len = 0;
 773                         }
 774                         break;
 775
 776                 case CTL_CH('a'):
 777                         BEGINNING_OF_LINE();
 778                         break;
 779                 case CTL_CH('c'):       /* ^C - break */
 780                         *buf = '\0';    /* discard input */
 781                         return (-1);
 782                 case CTL_CH('f'):
 783                         if (num < eol_num) {
 784                                 getcmd_putch(buf[num]);
 785                                 num++;
 786                         }
 787                         break;
 788                 case CTL_CH('b'):
 789                         if (num) {
 790                                 getcmd_putch(CTL_BACKSPACE);
 791                                 num--;
 792                         }
 793                         break;
 794                 case CTL_CH('d'):
 795                         if (num < eol_num) {
 796                                 wlen = eol_num - num - 1;
 797                                 if (wlen) {
 798                                         memmove(&buf[num], &buf[num+1], wlen);
 799                                         putnstr(buf + num, wlen);
 800                                 }
 801
 802                                 getcmd_putch(' ');
 803                                 do {
 804                                         getcmd_putch(CTL_BACKSPACE);
 805                                 } while (wlen--);
 806                                 eol_num--;
 807                         }
 808                         break;
 809                 case CTL_CH('k'):
 810                         ERASE_TO_EOL();
 811                         break;
 812                 case CTL_CH('e'):
 813                         REFRESH_TO_EOL();
 814                         break;
 815                 case CTL_CH('o'):
 816                         insert = !insert;
 817                         break;
 818                 case CTL_CH('x'):
 819                 case CTL_CH('u'):
 820                         BEGINNING_OF_LINE();
 821                         ERASE_TO_EOL();
 822                         break;
 823                 case DEL:
 824                 case DEL7:
 825                 case 8:
 826                         if (num) {
 827                                 wlen = eol_num - num;
 828                                 num--;
 829                                 memmove(&buf[num], &buf[num+1], wlen);
 830                                 getcmd_putch(CTL_BACKSPACE);
 831                                 putnstr(buf + num, wlen);
 832                                 getcmd_putch(' ');
 833                                 do {
 834                                         getcmd_putch(CTL_BACKSPACE);
 835                                 } while (wlen--);
 836                                 eol_num--;
 837                         }
 838                         break;
 839                 case CTL_CH('p'):
 840                 case CTL_CH('n'):
 841                 {
 842                         char * hline;
 843
 844                         esc_len = 0;
 845
 846                         if (ichar == CTL_CH('p'))
 847                                 hline = hist_prev();
 848                         else
 849                                 hline = hist_next();
 850
 851                         if (!hline) {
 852                                 getcmd_cbeep();
 853                                 continue;
 854                         }
 855
 856                         /* nuke the current line */
 857                         /* first, go home */
 858                         BEGINNING_OF_LINE();
 859
 860                         /* erase to end of line */
 861                         ERASE_TO_EOL();
 862
 863                         /* copy new line into place and display */
 864                         strcpy(buf, hline);
 865                         eol_num = strlen(buf);
 866                         REFRESH_TO_EOL();
 867                         continue;
 868                 }
 869 #ifdef CONFIG_AUTO_COMPLETE
 870                 case '\t': {
 871                         int num2, col;
 872
 873                         /* do not autocomplete when in the middle */
 874                         if (num < eol_num) {
 875                                 getcmd_cbeep();
 876                                 break;
 877                         }
 878
 879                         buf[num] = '\0';
 880                         col = strlen(prompt) + eol_num;
 881                         num2 = num;
 882                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 883                                 col = num2 - num;
 884                                 num += col;
 885                                 eol_num += col;
 886                         }
 887                         break;
 888                 }
 889 #endif
 890                 default:
 891                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 892                         break;
 893                 }
 894         }
 895         *len = eol_num;
 896         buf[eol_num] = '\0';    /* lose the newline */
 897
 898         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 899                 cread_add_to_hist(buf);
 900         hist_cur = hist_add_idx;
 901
 902         return 0;
 903 }
 904
 905 #endif /* CONFIG_CMDLINE_EDITING */
 906
 907 /****************************************************************************/
 908
 909 /*
 910  * Prompt for input and read a line.
 911  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 912  * time out when time goes past endtime (timebase time in ticks).
 913  * Return:      number of read characters
 914  *              -1 if break
 915  *              -2 if timed out
 916  */
 917 int readline (const char *const prompt)
 918 {
 919         /*
 920          * If console_buffer isn't 0-length the user will be prompted to modify
 921          * it instead of entering it from scratch as desired.
 922          */
 923         console_buffer[0] = '\0';
 924
 925         return readline_into_buffer(prompt, console_buffer);
 926 }
 927
 928
 929 int readline_into_buffer (const char *const prompt, char * buffer)
 930 {
 931         char *p = buffer;
 932 #ifdef CONFIG_CMDLINE_EDITING
 933         unsigned int len = CONFIG_SYS_CBSIZE;
 934         int rc;
 935         static int initted = 0;
 936
 937         /*
 938          * History uses a global array which is not
 939          * writable until after relocation to RAM.
 940          * Revert to non-history version if still
 941          * running from flash.
 942          */
 943         if (gd->flags & GD_FLG_RELOC) {
 944                 if (!initted) {
 945                         hist_init();
 946                         initted = 1;
 947                 }
 948
 949                 if (prompt)
 950                         puts (prompt);
 951
 952                 rc = cread_line(prompt, p, &len);
 953                 return rc < 0 ? rc : len;
 954
 955         } else {
 956 #endif  /* CONFIG_CMDLINE_EDITING */
 957         char * p_buf = p;
 958         int     n = 0;                          /* buffer index         */
 959         int     plen = 0;                       /* prompt length        */
 960         int     col;                            /* output column cnt    */
 961         char    c;
 962
 963         /* print prompt */
 964         if (prompt) {
 965                 plen = strlen (prompt);
 966                 puts (prompt);
 967         }
 968         col = plen;
 969
 970         for (;;) {
 971 #ifdef CONFIG_BOOT_RETRY_TIME
 972                 while (!tstc()) {       /* while no incoming data */
 973                         if (retry_time >= 0 && get_ticks() > endtime)
 974                                 return (-2);    /* timed out */
 975                         WATCHDOG_RESET();
 976                 }
 977 #endif
 978                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 979
 980 #ifdef CONFIG_SHOW_ACTIVITY
 981                 while (!tstc()) {
 982                         extern void show_activity(int arg);
 983                         show_activity(0);
 984                         WATCHDOG_RESET();
 985                 }
 986 #endif
 987                 c = getc();
 988
 989                 /*
 990                  * Special character handling
 991                  */
 992                 switch (c) {
 993                 case '\r':                              /* Enter                */
 994                 case '\n':
 995                         *p = '\0';
 996                         puts ("\r\n");
 997                         return (p - p_buf);
 998
 999                 case '\0':                              /* nul                  */
1000                         continue;
1001
1002                 case 0x03:                              /* ^C - break           */
1003                         p_buf[0] = '\0';        /* discard input */
1004                         return (-1);
1005
1006                 case 0x15:                              /* ^U - erase line      */
1007                         while (col > plen) {
1008                                 puts (erase_seq);
1009                                 --col;
1010                         }
1011                         p = p_buf;
1012                         n = 0;
1013                         continue;
1014
1015                 case 0x17:                              /* ^W - erase word      */
1016                         p=delete_char(p_buf, p, &col, &n, plen);
1017                         while ((n > 0) && (*p != ' ')) {
1018                                 p=delete_char(p_buf, p, &col, &n, plen);
1019                         }
1020                         continue;
1021
1022                 case 0x08:                              /* ^H  - backspace      */
1023                 case 0x7F:                              /* DEL - backspace      */
1024                         p=delete_char(p_buf, p, &col, &n, plen);
1025                         continue;
1026
1027                 default:
1028                         /*
1029                          * Must be a normal character then
1030                          */
1031                         if (n < CONFIG_SYS_CBSIZE-2) {
1032                                 if (c == '\t') {        /* expand TABs          */
1033 #ifdef CONFIG_AUTO_COMPLETE
1034                                         /* if auto completion triggered just continue */
1035                                         *p = '\0';
1036                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1037                                                 p = p_buf + n;  /* reset */
1038                                                 continue;
1039                                         }
1040 #endif
1041                                         puts (tab_seq+(col&07));
1042                                         col += 8 - (col&07);
1043                                 } else {
1044                                         ++col;          /* echo input           */
1045                                         putc (c);
1046                                 }
1047                                 *p++ = c;
1048                                 ++n;
1049                         } else {                        /* Buffer full          */
1050                                 putc ('\a');
1051                         }
1052                 }
1053         }
1054 #ifdef CONFIG_CMDLINE_EDITING
1055         }
1056 #endif
1057 }
1058
1059 /****************************************************************************/
1060
1061 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1062 {
1063         char *s;
1064
1065         if (*np == 0) {
1066                 return (p);
1067         }
1068
1069         if (*(--p) == '\t') {                   /* will retype the whole line   */
1070                 while (*colp > plen) {
1071                         puts (erase_seq);
1072                         (*colp)--;
1073                 }
1074                 for (s=buffer; s<p; ++s) {
1075                         if (*s == '\t') {
1076                                 puts (tab_seq+((*colp) & 07));
1077                                 *colp += 8 - ((*colp) & 07);
1078                         } else {
1079                                 ++(*colp);
1080                                 putc (*s);
1081                         }
1082                 }
1083         } else {
1084                 puts (erase_seq);
1085                 (*colp)--;
1086         }
1087         (*np)--;
1088         return (p);
1089 }
1090
1091 /****************************************************************************/
1092
1093 int parse_line (char *line, char *argv[])
1094 {
1095         int nargs = 0;
1096
1097 #ifdef DEBUG_PARSER
1098         printf ("parse_line: \"%s\"\n", line);
1099 #endif
1100         while (nargs < CONFIG_SYS_MAXARGS) {
1101
1102                 /* skip any white space */
1103                 while (isblank(*line))
1104                         ++line;
1105
1106                 if (*line == '\0') {    /* end of line, no more args    */
1107                         argv[nargs] = NULL;
1108 #ifdef DEBUG_PARSER
1109                 printf ("parse_line: nargs=%d\n", nargs);
1110 #endif
1111                         return (nargs);
1112                 }
1113
1114                 argv[nargs++] = line;   /* begin of argument string     */
1115
1116                 /* find end of string */
1117                 while (*line && !isblank(*line))
1118                         ++line;
1119
1120                 if (*line == '\0') {    /* end of line, no more args    */
1121                         argv[nargs] = NULL;
1122 #ifdef DEBUG_PARSER
1123                 printf ("parse_line: nargs=%d\n", nargs);
1124 #endif
1125                         return (nargs);
1126                 }
1127
1128                 *line++ = '\0';         /* terminate current arg         */
1129         }
1130
1131         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1132
1133 #ifdef DEBUG_PARSER
1134         printf ("parse_line: nargs=%d\n", nargs);
1135 #endif
1136         return (nargs);
1137 }
1138
1139 /****************************************************************************/
1140
1141 static void process_macros (const char *input, char *output)
1142 {
1143         char c, prev;
1144         const char *varname_start = NULL;
1145         int inputcnt = strlen (input);
1146         int outputcnt = CONFIG_SYS_CBSIZE;
1147         int state = 0;          /* 0 = waiting for '$'  */
1148
1149         /* 1 = waiting for '(' or '{' */
1150         /* 2 = waiting for ')' or '}' */
1151         /* 3 = waiting for '''  */
1152 #ifdef DEBUG_PARSER
1153         char *output_start = output;
1154
1155         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1156                 input);
1157 #endif
1158
1159         prev = '\0';            /* previous character   */
1160
1161         while (inputcnt && outputcnt) {
1162                 c = *input++;
1163                 inputcnt--;
1164
1165                 if (state != 3) {
1166                         /* remove one level of escape characters */
1167                         if ((c == '\\') && (prev != '\\')) {
1168                                 if (inputcnt-- == 0)
1169                                         break;
1170                                 prev = c;
1171                                 c = *input++;
1172                         }
1173                 }
1174
1175                 switch (state) {
1176                 case 0: /* Waiting for (unescaped) $    */
1177                         if ((c == '\'') && (prev != '\\')) {
1178                                 state = 3;
1179                                 break;
1180                         }
1181                         if ((c == '$') && (prev != '\\')) {
1182                                 state++;
1183                         } else {
1184                                 *(output++) = c;
1185                                 outputcnt--;
1186                         }
1187                         break;
1188                 case 1: /* Waiting for (        */
1189                         if (c == '(' || c == '{') {
1190                                 state++;
1191                                 varname_start = input;
1192                         } else {
1193                                 state = 0;
1194                                 *(output++) = '$';
1195                                 outputcnt--;
1196
1197                                 if (outputcnt) {
1198                                         *(output++) = c;
1199                                         outputcnt--;
1200                                 }
1201                         }
1202                         break;
1203                 case 2: /* Waiting for )        */
1204                         if (c == ')' || c == '}') {
1205                                 int i;
1206                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1207                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1208
1209                                 /* Get the varname */
1210                                 for (i = 0; i < envcnt; i++) {
1211                                         envname[i] = varname_start[i];
1212                                 }
1213                                 envname[i] = 0;
1214
1215                                 /* Get its value */
1216                                 envval = getenv (envname);
1217
1218                                 /* Copy into the line if it exists */
1219                                 if (envval != NULL)
1220                                         while ((*envval) && outputcnt) {
1221                                                 *(output++) = *(envval++);
1222                                                 outputcnt--;
1223                                         }
1224                                 /* Look for another '$' */
1225                                 state = 0;
1226                         }
1227                         break;
1228                 case 3: /* Waiting for '        */
1229                         if ((c == '\'') && (prev != '\\')) {
1230                                 state = 0;
1231                         } else {
1232                                 *(output++) = c;
1233                                 outputcnt--;
1234                         }
1235                         break;
1236                 }
1237                 prev = c;
1238         }
1239
1240         if (outputcnt)
1241                 *output = 0;
1242         else
1243                 *(output - 1) = 0;
1244
1245 #ifdef DEBUG_PARSER
1246         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1247                 strlen (output_start), output_start);
1248 #endif
1249 }
1250
1251 /****************************************************************************
1252  * returns:
1253  *      1  - command executed, repeatable
1254  *      0  - command executed but not repeatable, interrupted commands are
1255  *           always considered not repeatable
1256  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1257  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1258  *           considered unrecognized)
1259  *
1260  * WARNING:
1261  *
1262  * We must create a temporary copy of the command since the command we get
1263  * may be the result from getenv(), which returns a pointer directly to
1264  * the environment data, which may change magicly when the command we run
1265  * creates or modifies environment variables (like "bootp" does).
1266  */
1267
1268 int run_command (const char *cmd, int flag)
1269 {
1270         cmd_tbl_t *cmdtp;
1271         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1272         char *token;                    /* start of token in cmdbuf     */
1273         char *sep;                      /* end of token (separator) in cmdbuf */
1274         char finaltoken[CONFIG_SYS_CBSIZE];
1275         char *str = cmdbuf;
1276         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1277         int argc, inquotes;
1278         int repeatable = 1;
1279         int rc = 0;
1280
1281 #ifdef DEBUG_PARSER
1282         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1283         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1284         puts ("\"\n");
1285 #endif
1286
1287         clear_ctrlc();          /* forget any previous Control C */
1288
1289         if (!cmd || !*cmd) {
1290                 return -1;      /* empty command */
1291         }
1292
1293         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1294                 puts ("## Command too long!\n");
1295                 return -1;
1296         }
1297
1298         strcpy (cmdbuf, cmd);
1299
1300         /* Process separators and check for invalid
1301          * repeatable commands
1302          */
1303
1304 #ifdef DEBUG_PARSER
1305         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1306 #endif
1307         while (*str) {
1308
1309                 /*
1310                  * Find separator, or string end
1311                  * Allow simple escape of ';' by writing "\;"
1312                  */
1313                 for (inquotes = 0, sep = str; *sep; sep++) {
1314                         if ((*sep=='\'') &&
1315                             (*(sep-1) != '\\'))
1316                                 inquotes=!inquotes;
1317
1318                         if (!inquotes &&
1319                             (*sep == ';') &&    /* separator            */
1320                             ( sep != str) &&    /* past string start    */
1321                             (*(sep-1) != '\\')) /* and NOT escaped      */
1322                                 break;
1323                 }
1324
1325                 /*
1326                  * Limit the token to data between separators
1327                  */
1328                 token = str;
1329                 if (*sep) {
1330                         str = sep + 1;  /* start of command for next pass */
1331                         *sep = '\0';
1332                 }
1333                 else
1334                         str = sep;      /* no more commands for next pass */
1335 #ifdef DEBUG_PARSER
1336                 printf ("token: \"%s\"\n", token);
1337 #endif
1338
1339                 /* find macros in this token and replace them */
1340                 process_macros (token, finaltoken);
1341
1342                 /* Extract arguments */
1343                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1344                         rc = -1;        /* no command at all */
1345                         continue;
1346                 }
1347
1348                 /* Look up command in command table */
1349                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1350                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1351                         rc = -1;        /* give up after bad command */
1352                         continue;
1353                 }
1354
1355                 /* found - check max args */
1356                 if (argc > cmdtp->maxargs) {
1357                         cmd_usage(cmdtp);
1358                         rc = -1;
1359                         continue;
1360                 }
1361
1362 #if defined(CONFIG_CMD_BOOTD)
1363                 /* avoid "bootd" recursion */
1364                 if (cmdtp->cmd == do_bootd) {
1365 #ifdef DEBUG_PARSER
1366                         printf ("[%s]\n", finaltoken);
1367 #endif
1368                         if (flag & CMD_FLAG_BOOTD) {
1369                                 puts ("'bootd' recursion detected\n");
1370                                 rc = -1;
1371                                 continue;
1372                         } else {
1373                                 flag |= CMD_FLAG_BOOTD;
1374                         }
1375                 }
1376 #endif
1377
1378                 /* OK - call function to do the command */
1379                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1380                         rc = -1;
1381                 }
1382
1383                 repeatable &= cmdtp->repeatable;
1384
1385                 /* Did the user stop this? */
1386                 if (had_ctrlc ())
1387                         return -1;      /* if stopped then not repeatable */
1388         }
1389
1390         return rc ? rc : repeatable;
1391 }
1392
1393 /****************************************************************************/
1394
1395 #if defined(CONFIG_CMD_RUN)
1396 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1397 {
1398         int i;
1399
1400         if (argc < 2)
1401                 return cmd_usage(cmdtp);
1402
1403         for (i=1; i<argc; ++i) {
1404                 char *arg;
1405
1406                 if ((arg = getenv (argv[i])) == NULL) {
1407                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1408                         return 1;
1409                 }
1410
1411                 if (run_command2(arg, flag) != 0)
1412                         return 1;
1413         }
1414         return 0;
1415 }
1416 #endif