common/main.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Add to readline cmdline-editing by
   6  * (C) Copyright 2005
   7  * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /* #define      DEBUG   */
  29
  30 #include <common.h>
  31 #include <watchdog.h>
  32 #include <command.h>
  33 #ifdef CONFIG_MODEM_SUPPORT
  34 #include <malloc.h>             /* for free() prototype */
  35 #endif
  36
  37 #ifdef CONFIG_SYS_HUSH_PARSER
  38 #include <hush.h>
  39 #endif
  40
  41 #include <post.h>
  42
  43 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
  44 DECLARE_GLOBAL_DATA_PTR;
  45 #endif
  46
  47 /*
  48  * Board-specific Platform code can reimplement show_boot_progress () if needed
  49  */
  50 void inline __show_boot_progress (int val) {}
  51 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  52
  53 #if defined(CONFIG_UPDATE_TFTP)
  54 void update_tftp (void);
  55 #endif /* CONFIG_UPDATE_TFTP */
  56
  57 #define MAX_DELAY_STOP_STR 32
  58
  59 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  60 static int abortboot(int);
  61 #endif
  62
  63 #undef DEBUG_PARSER
  64
  65 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
  66
  67 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  68 static char erase_seq[] = "\b \b";              /* erase sequence       */
  69 static char   tab_seq[] = "        ";           /* used to expand TABs  */
  70
  71 #ifdef CONFIG_BOOT_RETRY_TIME
  72 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  73 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  74 #endif
  75
  76 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  77
  78 #ifndef CONFIG_BOOT_RETRY_MIN
  79 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  80 #endif
  81
  82 #ifdef CONFIG_MODEM_SUPPORT
  83 int do_mdm_init = 0;
  84 extern void mdm_init(void); /* defined in board.c */
  85 #endif
  86
  87 /***************************************************************************
  88  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  89  * returns: 0 -  no key string, allow autoboot
  90  *          1 - got key string, abort
  91  */
  92 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  93 # if defined(CONFIG_AUTOBOOT_KEYED)
  94 static __inline__ int abortboot(int bootdelay)
  95 {
  96         int abort = 0;
  97         uint64_t etime = endtick(bootdelay);
  98         struct {
  99                 char* str;
 100                 u_int len;
 101                 int retry;
 102         }
 103         delaykey [] = {
 104                 { str: getenv ("bootdelaykey"),  retry: 1 },
 105                 { str: getenv ("bootdelaykey2"), retry: 1 },
 106                 { str: getenv ("bootstopkey"),   retry: 0 },
 107                 { str: getenv ("bootstopkey2"),  retry: 0 },
 108         };
 109
 110         char presskey [MAX_DELAY_STOP_STR];
 111         u_int presskey_len = 0;
 112         u_int presskey_max = 0;
 113         u_int i;
 114
 115 #  ifdef CONFIG_AUTOBOOT_PROMPT
 116         printf(CONFIG_AUTOBOOT_PROMPT);
 117 #  endif
 118
 119 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 120         if (delaykey[0].str == NULL)
 121                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 122 #  endif
 123 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 124         if (delaykey[1].str == NULL)
 125                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 126 #  endif
 127 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 128         if (delaykey[2].str == NULL)
 129                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 130 #  endif
 131 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 132         if (delaykey[3].str == NULL)
 133                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 134 #  endif
 135
 136         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 137                 delaykey[i].len = delaykey[i].str == NULL ?
 138                                     0 : strlen (delaykey[i].str);
 139                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 140                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 141
 142                 presskey_max = presskey_max > delaykey[i].len ?
 143                                     presskey_max : delaykey[i].len;
 144
 145 #  if DEBUG_BOOTKEYS
 146                 printf("%s key:<%s>\n",
 147                        delaykey[i].retry ? "delay" : "stop",
 148                        delaykey[i].str ? delaykey[i].str : "NULL");
 149 #  endif
 150         }
 151
 152         /* In order to keep up with incoming data, check timeout only
 153          * when catch up.
 154          */
 155         do {
 156                 if (tstc()) {
 157                         if (presskey_len < presskey_max) {
 158                                 presskey [presskey_len ++] = getc();
 159                         }
 160                         else {
 161                                 for (i = 0; i < presskey_max - 1; i ++)
 162                                         presskey [i] = presskey [i + 1];
 163
 164                                 presskey [i] = getc();
 165                         }
 166                 }
 167
 168                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 169                         if (delaykey[i].len > 0 &&
 170                             presskey_len >= delaykey[i].len &&
 171                             memcmp (presskey + presskey_len - delaykey[i].len,
 172                                     delaykey[i].str,
 173                                     delaykey[i].len) == 0) {
 174 #  if DEBUG_BOOTKEYS
 175                                 printf("got %skey\n",
 176                                        delaykey[i].retry ? "delay" : "stop");
 177 #  endif
 178
 179 #  ifdef CONFIG_BOOT_RETRY_TIME
 180                                 /* don't retry auto boot */
 181                                 if (! delaykey[i].retry)
 182                                         retry_time = -1;
 183 #  endif
 184                                 abort = 1;
 185                         }
 186                 }
 187         } while (!abort && get_ticks() <= etime);
 188
 189 #  if DEBUG_BOOTKEYS
 190         if (!abort)
 191                 puts("key timeout\n");
 192 #  endif
 193
 194 #ifdef CONFIG_SILENT_CONSOLE
 195         if (abort)
 196                 gd->flags &= ~GD_FLG_SILENT;
 197 #endif
 198
 199         return abort;
 200 }
 201
 202 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 203
 204 #ifdef CONFIG_MENUKEY
 205 static int menukey = 0;
 206 #endif
 207
 208 static __inline__ int abortboot(int bootdelay)
 209 {
 210         int abort = 0;
 211
 212 #ifdef CONFIG_MENUPROMPT
 213         printf(CONFIG_MENUPROMPT);
 214 #else
 215         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 216 #endif
 217
 218 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 219         /*
 220          * Check if key already pressed
 221          * Don't check if bootdelay < 0
 222          */
 223         if (bootdelay >= 0) {
 224                 if (tstc()) {   /* we got a key press   */
 225                         (void) getc();  /* consume input        */
 226                         puts ("\b\b\b 0");
 227                         abort = 1;      /* don't auto boot      */
 228                 }
 229         }
 230 #endif
 231
 232         while ((bootdelay > 0) && (!abort)) {
 233                 int i;
 234
 235                 --bootdelay;
 236                 /* delay 100 * 10ms */
 237                 for (i=0; !abort && i<100; ++i) {
 238                         if (tstc()) {   /* we got a key press   */
 239                                 abort  = 1;     /* don't auto boot      */
 240                                 bootdelay = 0;  /* no more delay        */
 241 # ifdef CONFIG_MENUKEY
 242                                 menukey = getc();
 243 # else
 244                                 (void) getc();  /* consume input        */
 245 # endif
 246                                 break;
 247                         }
 248                         udelay(10000);
 249                 }
 250
 251                 printf("\b\b\b%2d ", bootdelay);
 252         }
 253
 254         putc('\n');
 255
 256 #ifdef CONFIG_SILENT_CONSOLE
 257         if (abort)
 258                 gd->flags &= ~GD_FLG_SILENT;
 259 #endif
 260
 261         return abort;
 262 }
 263 # endif /* CONFIG_AUTOBOOT_KEYED */
 264 #endif  /* CONFIG_BOOTDELAY >= 0  */
 265
 266 /****************************************************************************/
 267
 268 void main_loop (void)
 269 {
 270 #ifndef CONFIG_SYS_HUSH_PARSER
 271         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
 272         int len;
 273         int rc = 1;
 274         int flag;
 275 #endif
 276
 277 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 278         char *s;
 279         int bootdelay;
 280 #endif
 281 #ifdef CONFIG_PREBOOT
 282         char *p;
 283 #endif
 284 #ifdef CONFIG_BOOTCOUNT_LIMIT
 285         unsigned long bootcount = 0;
 286         unsigned long bootlimit = 0;
 287         char *bcs;
 288         char bcs_set[16];
 289 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 290
 291 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
 292         ulong bmp = 0;          /* default bitmap */
 293         extern int trab_vfd (ulong bitmap);
 294
 295 #ifdef CONFIG_MODEM_SUPPORT
 296         if (do_mdm_init)
 297                 bmp = 1;        /* alternate bitmap */
 298 #endif
 299         trab_vfd (bmp);
 300 #endif  /* CONFIG_VFD && VFD_TEST_LOGO */
 301
 302 #ifdef CONFIG_BOOTCOUNT_LIMIT
 303         bootcount = bootcount_load();
 304         bootcount++;
 305         bootcount_store (bootcount);
 306         sprintf (bcs_set, "%lu", bootcount);
 307         setenv ("bootcount", bcs_set);
 308         bcs = getenv ("bootlimit");
 309         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 310 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 311
 312 #ifdef CONFIG_MODEM_SUPPORT
 313         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 314         if (do_mdm_init) {
 315                 char *str = strdup(getenv("mdm_cmd"));
 316                 setenv ("preboot", str);  /* set or delete definition */
 317                 if (str != NULL)
 318                         free (str);
 319                 mdm_init(); /* wait for modem connection */
 320         }
 321 #endif  /* CONFIG_MODEM_SUPPORT */
 322
 323 #ifdef CONFIG_VERSION_VARIABLE
 324         {
 325                 extern char version_string[];
 326
 327                 setenv ("ver", version_string);  /* set version variable */
 328         }
 329 #endif /* CONFIG_VERSION_VARIABLE */
 330
 331 #ifdef CONFIG_SYS_HUSH_PARSER
 332         u_boot_hush_start ();
 333 #endif
 334
 335 #if defined(CONFIG_HUSH_INIT_VAR)
 336         hush_init_var ();
 337 #endif
 338
 339 #ifdef CONFIG_PREBOOT
 340         if ((p = getenv ("preboot")) != NULL) {
 341 # ifdef CONFIG_AUTOBOOT_KEYED
 342                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 343 # endif
 344
 345 # ifndef CONFIG_SYS_HUSH_PARSER
 346                 run_command (p, 0);
 347 # else
 348                 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
 349                                     FLAG_EXIT_FROM_LOOP);
 350 # endif
 351
 352 # ifdef CONFIG_AUTOBOOT_KEYED
 353                 disable_ctrlc(prev);    /* restore Control C checking */
 354 # endif
 355         }
 356 #endif /* CONFIG_PREBOOT */
 357
 358 #if defined(CONFIG_UPDATE_TFTP)
 359         update_tftp ();
 360 #endif /* CONFIG_UPDATE_TFTP */
 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 CONFIG_SYS_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 CONFIG_SYS_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         /*
 423          * Main Loop for Monitor Command Processing
 424          */
 425 #ifdef CONFIG_SYS_HUSH_PARSER
 426         parse_file_outer();
 427         /* This point is never reached */
 428         for (;;);
 429 #else
 430         for (;;) {
 431 #ifdef CONFIG_BOOT_RETRY_TIME
 432                 if (rc >= 0) {
 433                         /* Saw enough of a valid command to
 434                          * restart the timeout.
 435                          */
 436                         reset_cmd_timeout();
 437                 }
 438 #endif
 439                 len = readline (CONFIG_SYS_PROMPT);
 440
 441                 flag = 0;       /* assume no special flags for now */
 442                 if (len > 0)
 443                         strcpy (lastcommand, console_buffer);
 444                 else if (len == 0)
 445                         flag |= CMD_FLAG_REPEAT;
 446 #ifdef CONFIG_BOOT_RETRY_TIME
 447                 else if (len == -2) {
 448                         /* -2 means timed out, retry autoboot
 449                          */
 450                         puts ("\nTimed out waiting for command\n");
 451 # ifdef CONFIG_RESET_TO_RETRY
 452                         /* Reinit board to run initialization code again */
 453                         do_reset (NULL, 0, 0, NULL);
 454 # else
 455                         return;         /* retry autoboot */
 456 # endif
 457                 }
 458 #endif
 459
 460                 if (len == -1)
 461                         puts ("<INTERRUPT>\n");
 462                 else
 463                         rc = run_command (lastcommand, flag);
 464
 465                 if (rc <= 0) {
 466                         /* invalid command or not repeatable, forget it */
 467                         lastcommand[0] = 0;
 468                 }
 469         }
 470 #endif /*CONFIG_SYS_HUSH_PARSER*/
 471 }
 472
 473 #ifdef CONFIG_BOOT_RETRY_TIME
 474 /***************************************************************************
 475  * initialize command line timeout
 476  */
 477 void init_cmd_timeout(void)
 478 {
 479         char *s = getenv ("bootretry");
 480
 481         if (s != NULL)
 482                 retry_time = (int)simple_strtol(s, NULL, 10);
 483         else
 484                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 485
 486         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 487                 retry_time = CONFIG_BOOT_RETRY_MIN;
 488 }
 489
 490 /***************************************************************************
 491  * reset command line timeout to retry_time seconds
 492  */
 493 void reset_cmd_timeout(void)
 494 {
 495         endtime = endtick(retry_time);
 496 }
 497 #endif
 498
 499 #ifdef CONFIG_CMDLINE_EDITING
 500
 501 /*
 502  * cmdline-editing related codes from vivi.
 503  * Author: Janghoon Lyu <nandy@mizi.com>
 504  */
 505
 506 #define putnstr(str,n)  do {                    \
 507                 printf ("%.*s", (int)n, str);   \
 508         } while (0)
 509
 510 #define CTL_CH(c)               ((c) - 'a' + 1)
 511 #define CTL_BACKSPACE           ('\b')
 512 #define DEL                     ((char)255)
 513 #define DEL7                    ((char)127)
 514 #define CREAD_HIST_CHAR         ('!')
 515
 516 #define getcmd_putch(ch)        putc(ch)
 517 #define getcmd_getch()          getc()
 518 #define getcmd_cbeep()          getcmd_putch('\a')
 519
 520 #define HIST_MAX                20
 521 #define HIST_SIZE               CONFIG_SYS_CBSIZE
 522
 523 static int hist_max = 0;
 524 static int hist_add_idx = 0;
 525 static int hist_cur = -1;
 526 unsigned hist_num = 0;
 527
 528 char* hist_list[HIST_MAX];
 529 char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
 530
 531 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 532
 533 static void hist_init(void)
 534 {
 535         int i;
 536
 537         hist_max = 0;
 538         hist_add_idx = 0;
 539         hist_cur = -1;
 540         hist_num = 0;
 541
 542         for (i = 0; i < HIST_MAX; i++) {
 543                 hist_list[i] = hist_lines[i];
 544                 hist_list[i][0] = '\0';
 545         }
 546 }
 547
 548 static void cread_add_to_hist(char *line)
 549 {
 550         strcpy(hist_list[hist_add_idx], line);
 551
 552         if (++hist_add_idx >= HIST_MAX)
 553                 hist_add_idx = 0;
 554
 555         if (hist_add_idx > hist_max)
 556                 hist_max = hist_add_idx;
 557
 558         hist_num++;
 559 }
 560
 561 static char* hist_prev(void)
 562 {
 563         char *ret;
 564         int old_cur;
 565
 566         if (hist_cur < 0)
 567                 return NULL;
 568
 569         old_cur = hist_cur;
 570         if (--hist_cur < 0)
 571                 hist_cur = hist_max;
 572
 573         if (hist_cur == hist_add_idx) {
 574                 hist_cur = old_cur;
 575                 ret = NULL;
 576         } else
 577                 ret = hist_list[hist_cur];
 578
 579         return (ret);
 580 }
 581
 582 static char* hist_next(void)
 583 {
 584         char *ret;
 585
 586         if (hist_cur < 0)
 587                 return NULL;
 588
 589         if (hist_cur == hist_add_idx)
 590                 return NULL;
 591
 592         if (++hist_cur > hist_max)
 593                 hist_cur = 0;
 594
 595         if (hist_cur == hist_add_idx) {
 596                 ret = "";
 597         } else
 598                 ret = hist_list[hist_cur];
 599
 600         return (ret);
 601 }
 602
 603 #ifndef CONFIG_CMDLINE_EDITING
 604 static void cread_print_hist_list(void)
 605 {
 606         int i;
 607         unsigned long n;
 608
 609         n = hist_num - hist_max;
 610
 611         i = hist_add_idx + 1;
 612         while (1) {
 613                 if (i > hist_max)
 614                         i = 0;
 615                 if (i == hist_add_idx)
 616                         break;
 617                 printf("%s\n", hist_list[i]);
 618                 n++;
 619                 i++;
 620         }
 621 }
 622 #endif /* CONFIG_CMDLINE_EDITING */
 623
 624 #define BEGINNING_OF_LINE() {                   \
 625         while (num) {                           \
 626                 getcmd_putch(CTL_BACKSPACE);    \
 627                 num--;                          \
 628         }                                       \
 629 }
 630
 631 #define ERASE_TO_EOL() {                                \
 632         if (num < eol_num) {                            \
 633                 printf("%*s", (int)(eol_num - num), ""); \
 634                 do {                                    \
 635                         getcmd_putch(CTL_BACKSPACE);    \
 636                 } while (--eol_num > num);              \
 637         }                                               \
 638 }
 639
 640 #define REFRESH_TO_EOL() {                      \
 641         if (num < eol_num) {                    \
 642                 wlen = eol_num - num;           \
 643                 putnstr(buf + num, wlen);       \
 644                 num = eol_num;                  \
 645         }                                       \
 646 }
 647
 648 static void cread_add_char(char ichar, int insert, unsigned long *num,
 649                unsigned long *eol_num, char *buf, unsigned long len)
 650 {
 651         unsigned long wlen;
 652
 653         /* room ??? */
 654         if (insert || *num == *eol_num) {
 655                 if (*eol_num > len - 1) {
 656                         getcmd_cbeep();
 657                         return;
 658                 }
 659                 (*eol_num)++;
 660         }
 661
 662         if (insert) {
 663                 wlen = *eol_num - *num;
 664                 if (wlen > 1) {
 665                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 666                 }
 667
 668                 buf[*num] = ichar;
 669                 putnstr(buf + *num, wlen);
 670                 (*num)++;
 671                 while (--wlen) {
 672                         getcmd_putch(CTL_BACKSPACE);
 673                 }
 674         } else {
 675                 /* echo the character */
 676                 wlen = 1;
 677                 buf[*num] = ichar;
 678                 putnstr(buf + *num, wlen);
 679                 (*num)++;
 680         }
 681 }
 682
 683 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 684               unsigned long *eol_num, char *buf, unsigned long len)
 685 {
 686         while (strsize--) {
 687                 cread_add_char(*str, insert, num, eol_num, buf, len);
 688                 str++;
 689         }
 690 }
 691
 692 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
 693 {
 694         unsigned long num = 0;
 695         unsigned long eol_num = 0;
 696         unsigned long wlen;
 697         char ichar;
 698         int insert = 1;
 699         int esc_len = 0;
 700         char esc_save[8];
 701         int init_len = strlen(buf);
 702
 703         if (init_len)
 704                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
 705
 706         while (1) {
 707 #ifdef CONFIG_BOOT_RETRY_TIME
 708                 while (!tstc()) {       /* while no incoming data */
 709                         if (retry_time >= 0 && get_ticks() > endtime)
 710                                 return (-2);    /* timed out */
 711                         WATCHDOG_RESET();
 712                 }
 713 #endif
 714
 715                 ichar = getcmd_getch();
 716
 717                 if ((ichar == '\n') || (ichar == '\r')) {
 718                         putc('\n');
 719                         break;
 720                 }
 721
 722                 /*
 723                  * handle standard linux xterm esc sequences for arrow key, etc.
 724                  */
 725                 if (esc_len != 0) {
 726                         if (esc_len == 1) {
 727                                 if (ichar == '[') {
 728                                         esc_save[esc_len] = ichar;
 729                                         esc_len = 2;
 730                                 } else {
 731                                         cread_add_str(esc_save, esc_len, insert,
 732                                                       &num, &eol_num, buf, *len);
 733                                         esc_len = 0;
 734                                 }
 735                                 continue;
 736                         }
 737
 738                         switch (ichar) {
 739
 740                         case 'D':       /* <- key */
 741                                 ichar = CTL_CH('b');
 742                                 esc_len = 0;
 743                                 break;
 744                         case 'C':       /* -> key */
 745                                 ichar = CTL_CH('f');
 746                                 esc_len = 0;
 747                                 break;  /* pass off to ^F handler */
 748                         case 'H':       /* Home key */
 749                                 ichar = CTL_CH('a');
 750                                 esc_len = 0;
 751                                 break;  /* pass off to ^A handler */
 752                         case 'A':       /* up arrow */
 753                                 ichar = CTL_CH('p');
 754                                 esc_len = 0;
 755                                 break;  /* pass off to ^P handler */
 756                         case 'B':       /* down arrow */
 757                                 ichar = CTL_CH('n');
 758                                 esc_len = 0;
 759                                 break;  /* pass off to ^N handler */
 760                         default:
 761                                 esc_save[esc_len++] = ichar;
 762                                 cread_add_str(esc_save, esc_len, insert,
 763                                               &num, &eol_num, buf, *len);
 764                                 esc_len = 0;
 765                                 continue;
 766                         }
 767                 }
 768
 769                 switch (ichar) {
 770                 case 0x1b:
 771                         if (esc_len == 0) {
 772                                 esc_save[esc_len] = ichar;
 773                                 esc_len = 1;
 774                         } else {
 775                                 puts("impossible condition #876\n");
 776                                 esc_len = 0;
 777                         }
 778                         break;
 779
 780                 case CTL_CH('a'):
 781                         BEGINNING_OF_LINE();
 782                         break;
 783                 case CTL_CH('c'):       /* ^C - break */
 784                         *buf = '\0';    /* discard input */
 785                         return (-1);
 786                 case CTL_CH('f'):
 787                         if (num < eol_num) {
 788                                 getcmd_putch(buf[num]);
 789                                 num++;
 790                         }
 791                         break;
 792                 case CTL_CH('b'):
 793                         if (num) {
 794                                 getcmd_putch(CTL_BACKSPACE);
 795                                 num--;
 796                         }
 797                         break;
 798                 case CTL_CH('d'):
 799                         if (num < eol_num) {
 800                                 wlen = eol_num - num - 1;
 801                                 if (wlen) {
 802                                         memmove(&buf[num], &buf[num+1], wlen);
 803                                         putnstr(buf + num, wlen);
 804                                 }
 805
 806                                 getcmd_putch(' ');
 807                                 do {
 808                                         getcmd_putch(CTL_BACKSPACE);
 809                                 } while (wlen--);
 810                                 eol_num--;
 811                         }
 812                         break;
 813                 case CTL_CH('k'):
 814                         ERASE_TO_EOL();
 815                         break;
 816                 case CTL_CH('e'):
 817                         REFRESH_TO_EOL();
 818                         break;
 819                 case CTL_CH('o'):
 820                         insert = !insert;
 821                         break;
 822                 case CTL_CH('x'):
 823                 case CTL_CH('u'):
 824                         BEGINNING_OF_LINE();
 825                         ERASE_TO_EOL();
 826                         break;
 827                 case DEL:
 828                 case DEL7:
 829                 case 8:
 830                         if (num) {
 831                                 wlen = eol_num - num;
 832                                 num--;
 833                                 memmove(&buf[num], &buf[num+1], wlen);
 834                                 getcmd_putch(CTL_BACKSPACE);
 835                                 putnstr(buf + num, wlen);
 836                                 getcmd_putch(' ');
 837                                 do {
 838                                         getcmd_putch(CTL_BACKSPACE);
 839                                 } while (wlen--);
 840                                 eol_num--;
 841                         }
 842                         break;
 843                 case CTL_CH('p'):
 844                 case CTL_CH('n'):
 845                 {
 846                         char * hline;
 847
 848                         esc_len = 0;
 849
 850                         if (ichar == CTL_CH('p'))
 851                                 hline = hist_prev();
 852                         else
 853                                 hline = hist_next();
 854
 855                         if (!hline) {
 856                                 getcmd_cbeep();
 857                                 continue;
 858                         }
 859
 860                         /* nuke the current line */
 861                         /* first, go home */
 862                         BEGINNING_OF_LINE();
 863
 864                         /* erase to end of line */
 865                         ERASE_TO_EOL();
 866
 867                         /* copy new line into place and display */
 868                         strcpy(buf, hline);
 869                         eol_num = strlen(buf);
 870                         REFRESH_TO_EOL();
 871                         continue;
 872                 }
 873 #ifdef CONFIG_AUTO_COMPLETE
 874                 case '\t': {
 875                         int num2, col;
 876
 877                         /* do not autocomplete when in the middle */
 878                         if (num < eol_num) {
 879                                 getcmd_cbeep();
 880                                 break;
 881                         }
 882
 883                         buf[num] = '\0';
 884                         col = strlen(prompt) + eol_num;
 885                         num2 = num;
 886                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 887                                 col = num2 - num;
 888                                 num += col;
 889                                 eol_num += col;
 890                         }
 891                         break;
 892                 }
 893 #endif
 894                 default:
 895                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 896                         break;
 897                 }
 898         }
 899         *len = eol_num;
 900         buf[eol_num] = '\0';    /* lose the newline */
 901
 902         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 903                 cread_add_to_hist(buf);
 904         hist_cur = hist_add_idx;
 905
 906         return 0;
 907 }
 908
 909 #endif /* CONFIG_CMDLINE_EDITING */
 910
 911 /****************************************************************************/
 912
 913 /*
 914  * Prompt for input and read a line.
 915  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 916  * time out when time goes past endtime (timebase time in ticks).
 917  * Return:      number of read characters
 918  *              -1 if break
 919  *              -2 if timed out
 920  */
 921 int readline (const char *const prompt)
 922 {
 923         /*
 924          * If console_buffer isn't 0-length the user will be prompted to modify
 925          * it instead of entering it from scratch as desired.
 926          */
 927         console_buffer[0] = '\0';
 928
 929         return readline_into_buffer(prompt, console_buffer);
 930 }
 931
 932
 933 int readline_into_buffer (const char *const prompt, char * buffer)
 934 {
 935         char *p = buffer;
 936 #ifdef CONFIG_CMDLINE_EDITING
 937         unsigned int len = CONFIG_SYS_CBSIZE;
 938         int rc;
 939         static int initted = 0;
 940
 941         /*
 942          * History uses a global array which is not
 943          * writable until after relocation to RAM.
 944          * Revert to non-history version if still
 945          * running from flash.
 946          */
 947         if (gd->flags & GD_FLG_RELOC) {
 948                 if (!initted) {
 949                         hist_init();
 950                         initted = 1;
 951                 }
 952
 953                 if (prompt)
 954                         puts (prompt);
 955
 956                 rc = cread_line(prompt, p, &len);
 957                 return rc < 0 ? rc : len;
 958
 959         } else {
 960 #endif  /* CONFIG_CMDLINE_EDITING */
 961         char * p_buf = p;
 962         int     n = 0;                          /* buffer index         */
 963         int     plen = 0;                       /* prompt length        */
 964         int     col;                            /* output column cnt    */
 965         char    c;
 966
 967         /* print prompt */
 968         if (prompt) {
 969                 plen = strlen (prompt);
 970                 puts (prompt);
 971         }
 972         col = plen;
 973
 974         for (;;) {
 975 #ifdef CONFIG_BOOT_RETRY_TIME
 976                 while (!tstc()) {       /* while no incoming data */
 977                         if (retry_time >= 0 && get_ticks() > endtime)
 978                                 return (-2);    /* timed out */
 979                         WATCHDOG_RESET();
 980                 }
 981 #endif
 982                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 983
 984 #ifdef CONFIG_SHOW_ACTIVITY
 985                 while (!tstc()) {
 986                         extern void show_activity(int arg);
 987                         show_activity(0);
 988                         WATCHDOG_RESET();
 989                 }
 990 #endif
 991                 c = getc();
 992
 993                 /*
 994                  * Special character handling
 995                  */
 996                 switch (c) {
 997                 case '\r':                              /* Enter                */
 998                 case '\n':
 999                         *p = '\0';
1000                         puts ("\r\n");
1001                         return (p - p_buf);
1002
1003                 case '\0':                              /* nul                  */
1004                         continue;
1005
1006                 case 0x03:                              /* ^C - break           */
1007                         p_buf[0] = '\0';        /* discard input */
1008                         return (-1);
1009
1010                 case 0x15:                              /* ^U - erase line      */
1011                         while (col > plen) {
1012                                 puts (erase_seq);
1013                                 --col;
1014                         }
1015                         p = p_buf;
1016                         n = 0;
1017                         continue;
1018
1019                 case 0x17:                              /* ^W - erase word      */
1020                         p=delete_char(p_buf, p, &col, &n, plen);
1021                         while ((n > 0) && (*p != ' ')) {
1022                                 p=delete_char(p_buf, p, &col, &n, plen);
1023                         }
1024                         continue;
1025
1026                 case 0x08:                              /* ^H  - backspace      */
1027                 case 0x7F:                              /* DEL - backspace      */
1028                         p=delete_char(p_buf, p, &col, &n, plen);
1029                         continue;
1030
1031                 default:
1032                         /*
1033                          * Must be a normal character then
1034                          */
1035                         if (n < CONFIG_SYS_CBSIZE-2) {
1036                                 if (c == '\t') {        /* expand TABs          */
1037 #ifdef CONFIG_AUTO_COMPLETE
1038                                         /* if auto completion triggered just continue */
1039                                         *p = '\0';
1040                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1041                                                 p = p_buf + n;  /* reset */
1042                                                 continue;
1043                                         }
1044 #endif
1045                                         puts (tab_seq+(col&07));
1046                                         col += 8 - (col&07);
1047                                 } else {
1048                                         ++col;          /* echo input           */
1049                                         putc (c);
1050                                 }
1051                                 *p++ = c;
1052                                 ++n;
1053                         } else {                        /* Buffer full          */
1054                                 putc ('\a');
1055                         }
1056                 }
1057         }
1058 #ifdef CONFIG_CMDLINE_EDITING
1059         }
1060 #endif
1061 }
1062
1063 /****************************************************************************/
1064
1065 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1066 {
1067         char *s;
1068
1069         if (*np == 0) {
1070                 return (p);
1071         }
1072
1073         if (*(--p) == '\t') {                   /* will retype the whole line   */
1074                 while (*colp > plen) {
1075                         puts (erase_seq);
1076                         (*colp)--;
1077                 }
1078                 for (s=buffer; s<p; ++s) {
1079                         if (*s == '\t') {
1080                                 puts (tab_seq+((*colp) & 07));
1081                                 *colp += 8 - ((*colp) & 07);
1082                         } else {
1083                                 ++(*colp);
1084                                 putc (*s);
1085                         }
1086                 }
1087         } else {
1088                 puts (erase_seq);
1089                 (*colp)--;
1090         }
1091         (*np)--;
1092         return (p);
1093 }
1094
1095 /****************************************************************************/
1096
1097 int parse_line (char *line, char *argv[])
1098 {
1099         int nargs = 0;
1100
1101 #ifdef DEBUG_PARSER
1102         printf ("parse_line: \"%s\"\n", line);
1103 #endif
1104         while (nargs < CONFIG_SYS_MAXARGS) {
1105
1106                 /* skip any white space */
1107                 while ((*line == ' ') || (*line == '\t')) {
1108                         ++line;
1109                 }
1110
1111                 if (*line == '\0') {    /* end of line, no more args    */
1112                         argv[nargs] = NULL;
1113 #ifdef DEBUG_PARSER
1114                 printf ("parse_line: nargs=%d\n", nargs);
1115 #endif
1116                         return (nargs);
1117                 }
1118
1119                 argv[nargs++] = line;   /* begin of argument string     */
1120
1121                 /* find end of string */
1122                 while (*line && (*line != ' ') && (*line != '\t')) {
1123                         ++line;
1124                 }
1125
1126                 if (*line == '\0') {    /* end of line, no more args    */
1127                         argv[nargs] = NULL;
1128 #ifdef DEBUG_PARSER
1129                 printf ("parse_line: nargs=%d\n", nargs);
1130 #endif
1131                         return (nargs);
1132                 }
1133
1134                 *line++ = '\0';         /* terminate current arg         */
1135         }
1136
1137         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1138
1139 #ifdef DEBUG_PARSER
1140         printf ("parse_line: nargs=%d\n", nargs);
1141 #endif
1142         return (nargs);
1143 }
1144
1145 /****************************************************************************/
1146
1147 static void process_macros (const char *input, char *output)
1148 {
1149         char c, prev;
1150         const char *varname_start = NULL;
1151         int inputcnt = strlen (input);
1152         int outputcnt = CONFIG_SYS_CBSIZE;
1153         int state = 0;          /* 0 = waiting for '$'  */
1154
1155         /* 1 = waiting for '(' or '{' */
1156         /* 2 = waiting for ')' or '}' */
1157         /* 3 = waiting for '''  */
1158 #ifdef DEBUG_PARSER
1159         char *output_start = output;
1160
1161         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1162                 input);
1163 #endif
1164
1165         prev = '\0';            /* previous character   */
1166
1167         while (inputcnt && outputcnt) {
1168                 c = *input++;
1169                 inputcnt--;
1170
1171                 if (state != 3) {
1172                         /* remove one level of escape characters */
1173                         if ((c == '\\') && (prev != '\\')) {
1174                                 if (inputcnt-- == 0)
1175                                         break;
1176                                 prev = c;
1177                                 c = *input++;
1178                         }
1179                 }
1180
1181                 switch (state) {
1182                 case 0: /* Waiting for (unescaped) $    */
1183                         if ((c == '\'') && (prev != '\\')) {
1184                                 state = 3;
1185                                 break;
1186                         }
1187                         if ((c == '$') && (prev != '\\')) {
1188                                 state++;
1189                         } else {
1190                                 *(output++) = c;
1191                                 outputcnt--;
1192                         }
1193                         break;
1194                 case 1: /* Waiting for (        */
1195                         if (c == '(' || c == '{') {
1196                                 state++;
1197                                 varname_start = input;
1198                         } else {
1199                                 state = 0;
1200                                 *(output++) = '$';
1201                                 outputcnt--;
1202
1203                                 if (outputcnt) {
1204                                         *(output++) = c;
1205                                         outputcnt--;
1206                                 }
1207                         }
1208                         break;
1209                 case 2: /* Waiting for )        */
1210                         if (c == ')' || c == '}') {
1211                                 int i;
1212                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1213                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1214
1215                                 /* Get the varname */
1216                                 for (i = 0; i < envcnt; i++) {
1217                                         envname[i] = varname_start[i];
1218                                 }
1219                                 envname[i] = 0;
1220
1221                                 /* Get its value */
1222                                 envval = getenv (envname);
1223
1224                                 /* Copy into the line if it exists */
1225                                 if (envval != NULL)
1226                                         while ((*envval) && outputcnt) {
1227                                                 *(output++) = *(envval++);
1228                                                 outputcnt--;
1229                                         }
1230                                 /* Look for another '$' */
1231                                 state = 0;
1232                         }
1233                         break;
1234                 case 3: /* Waiting for '        */
1235                         if ((c == '\'') && (prev != '\\')) {
1236                                 state = 0;
1237                         } else {
1238                                 *(output++) = c;
1239                                 outputcnt--;
1240                         }
1241                         break;
1242                 }
1243                 prev = c;
1244         }
1245
1246         if (outputcnt)
1247                 *output = 0;
1248         else
1249                 *(output - 1) = 0;
1250
1251 #ifdef DEBUG_PARSER
1252         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1253                 strlen (output_start), output_start);
1254 #endif
1255 }
1256
1257 /****************************************************************************
1258  * returns:
1259  *      1  - command executed, repeatable
1260  *      0  - command executed but not repeatable, interrupted commands are
1261  *           always considered not repeatable
1262  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1263  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1264  *           considered unrecognized)
1265  *
1266  * WARNING:
1267  *
1268  * We must create a temporary copy of the command since the command we get
1269  * may be the result from getenv(), which returns a pointer directly to
1270  * the environment data, which may change magicly when the command we run
1271  * creates or modifies environment variables (like "bootp" does).
1272  */
1273
1274 int run_command (const char *cmd, int flag)
1275 {
1276         cmd_tbl_t *cmdtp;
1277         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1278         char *token;                    /* start of token in cmdbuf     */
1279         char *sep;                      /* end of token (separator) in cmdbuf */
1280         char finaltoken[CONFIG_SYS_CBSIZE];
1281         char *str = cmdbuf;
1282         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1283         int argc, inquotes;
1284         int repeatable = 1;
1285         int rc = 0;
1286
1287 #ifdef DEBUG_PARSER
1288         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1289         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1290         puts ("\"\n");
1291 #endif
1292
1293         clear_ctrlc();          /* forget any previous Control C */
1294
1295         if (!cmd || !*cmd) {
1296                 return -1;      /* empty command */
1297         }
1298
1299         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1300                 puts ("## Command too long!\n");
1301                 return -1;
1302         }
1303
1304         strcpy (cmdbuf, cmd);
1305
1306         /* Process separators and check for invalid
1307          * repeatable commands
1308          */
1309
1310 #ifdef DEBUG_PARSER
1311         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1312 #endif
1313         while (*str) {
1314
1315                 /*
1316                  * Find separator, or string end
1317                  * Allow simple escape of ';' by writing "\;"
1318                  */
1319                 for (inquotes = 0, sep = str; *sep; sep++) {
1320                         if ((*sep=='\'') &&
1321                             (*(sep-1) != '\\'))
1322                                 inquotes=!inquotes;
1323
1324                         if (!inquotes &&
1325                             (*sep == ';') &&    /* separator            */
1326                             ( sep != str) &&    /* past string start    */
1327                             (*(sep-1) != '\\')) /* and NOT escaped      */
1328                                 break;
1329                 }
1330
1331                 /*
1332                  * Limit the token to data between separators
1333                  */
1334                 token = str;
1335                 if (*sep) {
1336                         str = sep + 1;  /* start of command for next pass */
1337                         *sep = '\0';
1338                 }
1339                 else
1340                         str = sep;      /* no more commands for next pass */
1341 #ifdef DEBUG_PARSER
1342                 printf ("token: \"%s\"\n", token);
1343 #endif
1344
1345                 /* find macros in this token and replace them */
1346                 process_macros (token, finaltoken);
1347
1348                 /* Extract arguments */
1349                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1350                         rc = -1;        /* no command at all */
1351                         continue;
1352                 }
1353
1354                 /* Look up command in command table */
1355                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1356                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1357                         rc = -1;        /* give up after bad command */
1358                         continue;
1359                 }
1360
1361                 /* found - check max args */
1362                 if (argc > cmdtp->maxargs) {
1363                         cmd_usage(cmdtp);
1364                         rc = -1;
1365                         continue;
1366                 }
1367
1368 #if defined(CONFIG_CMD_BOOTD)
1369                 /* avoid "bootd" recursion */
1370                 if (cmdtp->cmd == do_bootd) {
1371 #ifdef DEBUG_PARSER
1372                         printf ("[%s]\n", finaltoken);
1373 #endif
1374                         if (flag & CMD_FLAG_BOOTD) {
1375                                 puts ("'bootd' recursion detected\n");
1376                                 rc = -1;
1377                                 continue;
1378                         } else {
1379                                 flag |= CMD_FLAG_BOOTD;
1380                         }
1381                 }
1382 #endif
1383
1384                 /* OK - call function to do the command */
1385                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1386                         rc = -1;
1387                 }
1388
1389                 repeatable &= cmdtp->repeatable;
1390
1391                 /* Did the user stop this? */
1392                 if (had_ctrlc ())
1393                         return -1;      /* if stopped then not repeatable */
1394         }
1395
1396         return rc ? rc : repeatable;
1397 }
1398
1399 /****************************************************************************/
1400
1401 #if defined(CONFIG_CMD_RUN)
1402 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1403 {
1404         int i;
1405
1406         if (argc < 2)
1407                 return cmd_usage(cmdtp);
1408
1409         for (i=1; i<argc; ++i) {
1410                 char *arg;
1411
1412                 if ((arg = getenv (argv[i])) == NULL) {
1413                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1414                         return 1;
1415                 }
1416 #ifndef CONFIG_SYS_HUSH_PARSER
1417                 if (run_command (arg, flag) == -1)
1418                         return 1;
1419 #else
1420                 if (parse_string_outer(arg,
1421                     FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1422                         return 1;
1423 #endif
1424         }
1425         return 0;
1426 }
1427 #endif