common/main.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Add to readline cmdline-editing by
   6  * (C) Copyright 2005
   7  * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /* #define      DEBUG   */
  29
  30 #include <common.h>
  31 #include <watchdog.h>
  32 #include <command.h>
  33 #ifdef CONFIG_MODEM_SUPPORT
  34 #include <malloc.h>             /* for free() prototype */
  35 #endif
  36
  37 #ifdef CFG_HUSH_PARSER
  38 #include <hush.h>
  39 #endif
  40
  41 #include <post.h>
  42
  43 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || 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 inline show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  52
  53 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
  54 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);               /* for do_reset() prototype */
  55 #endif
  56
  57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  58
  59 #if defined(CONFIG_UPDATE_TFTP)
  60 void update_tftp (void);
  61 #endif /* CONFIG_UPDATE_TFTP */
  62
  63 #define MAX_DELAY_STOP_STR 32
  64
  65 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  66 static int abortboot(int);
  67 #endif
  68
  69 #undef DEBUG_PARSER
  70
  71 char        console_buffer[CFG_CBSIZE];         /* console I/O buffer   */
  72
  73 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  74 static char erase_seq[] = "\b \b";              /* erase sequence       */
  75 static char   tab_seq[] = "        ";           /* used to expand TABs  */
  76
  77 #ifdef CONFIG_BOOT_RETRY_TIME
  78 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  79 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  80 #endif
  81
  82 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  83
  84 #ifndef CONFIG_BOOT_RETRY_MIN
  85 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  86 #endif
  87
  88 #ifdef CONFIG_MODEM_SUPPORT
  89 int do_mdm_init = 0;
  90 extern void mdm_init(void); /* defined in board.c */
  91 #endif
  92
  93 /***************************************************************************
  94  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  95  * returns: 0 -  no key string, allow autoboot
  96  *          1 - got key string, abort
  97  */
  98 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  99 # if defined(CONFIG_AUTOBOOT_KEYED)
 100 static __inline__ int abortboot(int bootdelay)
 101 {
 102         int abort = 0;
 103         uint64_t etime = endtick(bootdelay);
 104         struct {
 105                 char* str;
 106                 u_int len;
 107                 int retry;
 108         }
 109         delaykey [] = {
 110                 { str: getenv ("bootdelaykey"),  retry: 1 },
 111                 { str: getenv ("bootdelaykey2"), retry: 1 },
 112                 { str: getenv ("bootstopkey"),   retry: 0 },
 113                 { str: getenv ("bootstopkey2"),  retry: 0 },
 114         };
 115
 116         char presskey [MAX_DELAY_STOP_STR];
 117         u_int presskey_len = 0;
 118         u_int presskey_max = 0;
 119         u_int i;
 120
 121 #  ifdef CONFIG_AUTOBOOT_PROMPT
 122         printf(CONFIG_AUTOBOOT_PROMPT);
 123 #  endif
 124
 125 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 126         if (delaykey[0].str == NULL)
 127                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 128 #  endif
 129 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 130         if (delaykey[1].str == NULL)
 131                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 132 #  endif
 133 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 134         if (delaykey[2].str == NULL)
 135                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 136 #  endif
 137 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 138         if (delaykey[3].str == NULL)
 139                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 140 #  endif
 141
 142         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 143                 delaykey[i].len = delaykey[i].str == NULL ?
 144                                     0 : strlen (delaykey[i].str);
 145                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 146                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 147
 148                 presskey_max = presskey_max > delaykey[i].len ?
 149                                     presskey_max : delaykey[i].len;
 150
 151 #  if DEBUG_BOOTKEYS
 152                 printf("%s key:<%s>\n",
 153                        delaykey[i].retry ? "delay" : "stop",
 154                        delaykey[i].str ? delaykey[i].str : "NULL");
 155 #  endif
 156         }
 157
 158         /* In order to keep up with incoming data, check timeout only
 159          * when catch up.
 160          */
 161         while (!abort && get_ticks() <= etime) {
 162                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 163                         if (delaykey[i].len > 0 &&
 164                             presskey_len >= delaykey[i].len &&
 165                             memcmp (presskey + presskey_len - delaykey[i].len,
 166                                     delaykey[i].str,
 167                                     delaykey[i].len) == 0) {
 168 #  if DEBUG_BOOTKEYS
 169                                 printf("got %skey\n",
 170                                        delaykey[i].retry ? "delay" : "stop");
 171 #  endif
 172
 173 #  ifdef CONFIG_BOOT_RETRY_TIME
 174                                 /* don't retry auto boot */
 175                                 if (! delaykey[i].retry)
 176                                         retry_time = -1;
 177 #  endif
 178                                 abort = 1;
 179                         }
 180                 }
 181
 182                 if (tstc()) {
 183                         if (presskey_len < presskey_max) {
 184                                 presskey [presskey_len ++] = getc();
 185                         }
 186                         else {
 187                                 for (i = 0; i < presskey_max - 1; i ++)
 188                                         presskey [i] = presskey [i + 1];
 189
 190                                 presskey [i] = getc();
 191                         }
 192                 }
 193         }
 194 #  if DEBUG_BOOTKEYS
 195         if (!abort)
 196                 puts("key timeout\n");
 197 #  endif
 198
 199 #ifdef CONFIG_SILENT_CONSOLE
 200         if (abort)
 201                 gd->flags &= ~GD_FLG_SILENT;
 202 #endif
 203
 204         return abort;
 205 }
 206
 207 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 208
 209 #ifdef CONFIG_MENUKEY
 210 static int menukey = 0;
 211 #endif
 212
 213 static __inline__ int abortboot(int bootdelay)
 214 {
 215         int abort = 0;
 216
 217 #ifdef CONFIG_MENUPROMPT
 218         printf(CONFIG_MENUPROMPT);
 219 #else
 220         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 221 #endif
 222
 223 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 224         /*
 225          * Check if key already pressed
 226          * Don't check if bootdelay < 0
 227          */
 228         if (bootdelay >= 0) {
 229                 if (tstc()) {   /* we got a key press   */
 230                         (void) getc();  /* consume input        */
 231                         puts ("\b\b\b 0");
 232                         abort = 1;      /* don't auto boot      */
 233                 }
 234         }
 235 #endif
 236
 237         while ((bootdelay > 0) && (!abort)) {
 238                 int i;
 239
 240                 --bootdelay;
 241                 /* delay 100 * 10ms */
 242                 for (i=0; !abort && i<100; ++i) {
 243                         if (tstc()) {   /* we got a key press   */
 244                                 abort  = 1;     /* don't auto boot      */
 245                                 bootdelay = 0;  /* no more delay        */
 246 # ifdef CONFIG_MENUKEY
 247                                 menukey = getc();
 248 # else
 249                                 (void) getc();  /* consume input        */
 250 # endif
 251                                 break;
 252                         }
 253                         udelay(10000);
 254                 }
 255
 256                 printf("\b\b\b%2d ", bootdelay);
 257         }
 258
 259         putc('\n');
 260
 261 #ifdef CONFIG_SILENT_CONSOLE
 262         if (abort)
 263                 gd->flags &= ~GD_FLG_SILENT;
 264 #endif
 265
 266         return abort;
 267 }
 268 # endif /* CONFIG_AUTOBOOT_KEYED */
 269 #endif  /* CONFIG_BOOTDELAY >= 0  */
 270
 271 /****************************************************************************/
 272
 273 void main_loop (void)
 274 {
 275 #ifndef CFG_HUSH_PARSER
 276         static char lastcommand[CFG_CBSIZE] = { 0, };
 277         int len;
 278         int rc = 1;
 279         int flag;
 280 #endif
 281
 282 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 283         char *s;
 284         int bootdelay;
 285 #endif
 286 #ifdef CONFIG_PREBOOT
 287         char *p;
 288 #endif
 289 #ifdef CONFIG_BOOTCOUNT_LIMIT
 290         unsigned long bootcount = 0;
 291         unsigned long bootlimit = 0;
 292         char *bcs;
 293         char bcs_set[16];
 294 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 295
 296 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
 297         ulong bmp = 0;          /* default bitmap */
 298         extern int trab_vfd (ulong bitmap);
 299
 300 #ifdef CONFIG_MODEM_SUPPORT
 301         if (do_mdm_init)
 302                 bmp = 1;        /* alternate bitmap */
 303 #endif
 304         trab_vfd (bmp);
 305 #endif  /* CONFIG_VFD && VFD_TEST_LOGO */
 306
 307 #if defined(CONFIG_UPDATE_TFTP)
 308         update_tftp ();
 309 #endif /* CONFIG_UPDATE_TFTP */
 310
 311 #ifdef CONFIG_BOOTCOUNT_LIMIT
 312         bootcount = bootcount_load();
 313         bootcount++;
 314         bootcount_store (bootcount);
 315         sprintf (bcs_set, "%lu", bootcount);
 316         setenv ("bootcount", bcs_set);
 317         bcs = getenv ("bootlimit");
 318         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 319 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 320
 321 #ifdef CONFIG_MODEM_SUPPORT
 322         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 323         if (do_mdm_init) {
 324                 char *str = strdup(getenv("mdm_cmd"));
 325                 setenv ("preboot", str);  /* set or delete definition */
 326                 if (str != NULL)
 327                         free (str);
 328                 mdm_init(); /* wait for modem connection */
 329         }
 330 #endif  /* CONFIG_MODEM_SUPPORT */
 331
 332 #ifdef CONFIG_VERSION_VARIABLE
 333         {
 334                 extern char version_string[];
 335
 336                 setenv ("ver", version_string);  /* set version variable */
 337         }
 338 #endif /* CONFIG_VERSION_VARIABLE */
 339
 340 #ifdef CFG_HUSH_PARSER
 341         u_boot_hush_start ();
 342 #endif
 343
 344 #ifdef CONFIG_AUTO_COMPLETE
 345         install_auto_complete();
 346 #endif
 347
 348 #ifdef CONFIG_PREBOOT
 349         if ((p = getenv ("preboot")) != NULL) {
 350 # ifdef CONFIG_AUTOBOOT_KEYED
 351                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 352 # endif
 353
 354 # ifndef CFG_HUSH_PARSER
 355                 run_command (p, 0);
 356 # else
 357                 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
 358                                     FLAG_EXIT_FROM_LOOP);
 359 # endif
 360
 361 # ifdef CONFIG_AUTOBOOT_KEYED
 362                 disable_ctrlc(prev);    /* restore Control C checking */
 363 # endif
 364         }
 365 #endif /* CONFIG_PREBOOT */
 366
 367 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 368         s = getenv ("bootdelay");
 369         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 370
 371         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 372
 373 # ifdef CONFIG_BOOT_RETRY_TIME
 374         init_cmd_timeout ();
 375 # endif /* CONFIG_BOOT_RETRY_TIME */
 376
 377 #ifdef CONFIG_POST
 378         if (gd->flags & GD_FLG_POSTFAIL) {
 379                 s = getenv("failbootcmd");
 380         }
 381         else
 382 #endif /* CONFIG_POST */
 383 #ifdef CONFIG_BOOTCOUNT_LIMIT
 384         if (bootlimit && (bootcount > bootlimit)) {
 385                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 386                         (unsigned)bootlimit);
 387                 s = getenv ("altbootcmd");
 388         }
 389         else
 390 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 391                 s = getenv ("bootcmd");
 392
 393         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 394
 395         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 396 # ifdef CONFIG_AUTOBOOT_KEYED
 397                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 398 # endif
 399
 400 # ifndef CFG_HUSH_PARSER
 401                 run_command (s, 0);
 402 # else
 403                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 404                                     FLAG_EXIT_FROM_LOOP);
 405 # endif
 406
 407 # ifdef CONFIG_AUTOBOOT_KEYED
 408                 disable_ctrlc(prev);    /* restore Control C checking */
 409 # endif
 410         }
 411
 412 # ifdef CONFIG_MENUKEY
 413         if (menukey == CONFIG_MENUKEY) {
 414             s = getenv("menucmd");
 415             if (s) {
 416 # ifndef CFG_HUSH_PARSER
 417                 run_command (s, 0);
 418 # else
 419                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 420                                     FLAG_EXIT_FROM_LOOP);
 421 # endif
 422             }
 423         }
 424 #endif /* CONFIG_MENUKEY */
 425 #endif  /* CONFIG_BOOTDELAY */
 426
 427 #ifdef CONFIG_AMIGAONEG3SE
 428         {
 429             extern void video_banner(void);
 430             video_banner();
 431         }
 432 #endif
 433
 434         /*
 435          * Main Loop for Monitor Command Processing
 436          */
 437 #ifdef CFG_HUSH_PARSER
 438         parse_file_outer();
 439         /* This point is never reached */
 440         for (;;);
 441 #else
 442         for (;;) {
 443 #ifdef CONFIG_BOOT_RETRY_TIME
 444                 if (rc >= 0) {
 445                         /* Saw enough of a valid command to
 446                          * restart the timeout.
 447                          */
 448                         reset_cmd_timeout();
 449                 }
 450 #endif
 451                 len = readline (CFG_PROMPT);
 452
 453                 flag = 0;       /* assume no special flags for now */
 454                 if (len > 0)
 455                         strcpy (lastcommand, console_buffer);
 456                 else if (len == 0)
 457                         flag |= CMD_FLAG_REPEAT;
 458 #ifdef CONFIG_BOOT_RETRY_TIME
 459                 else if (len == -2) {
 460                         /* -2 means timed out, retry autoboot
 461                          */
 462                         puts ("\nTimed out waiting for command\n");
 463 # ifdef CONFIG_RESET_TO_RETRY
 464                         /* Reinit board to run initialization code again */
 465                         do_reset (NULL, 0, 0, NULL);
 466 # else
 467                         return;         /* retry autoboot */
 468 # endif
 469                 }
 470 #endif
 471
 472                 if (len == -1)
 473                         puts ("<INTERRUPT>\n");
 474                 else
 475                         rc = run_command (lastcommand, flag);
 476
 477                 if (rc <= 0) {
 478                         /* invalid command or not repeatable, forget it */
 479                         lastcommand[0] = 0;
 480                 }
 481         }
 482 #endif /*CFG_HUSH_PARSER*/
 483 }
 484
 485 #ifdef CONFIG_BOOT_RETRY_TIME
 486 /***************************************************************************
 487  * initialize command line timeout
 488  */
 489 void init_cmd_timeout(void)
 490 {
 491         char *s = getenv ("bootretry");
 492
 493         if (s != NULL)
 494                 retry_time = (int)simple_strtol(s, NULL, 10);
 495         else
 496                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 497
 498         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 499                 retry_time = CONFIG_BOOT_RETRY_MIN;
 500 }
 501
 502 /***************************************************************************
 503  * reset command line timeout to retry_time seconds
 504  */
 505 void reset_cmd_timeout(void)
 506 {
 507         endtime = endtick(retry_time);
 508 }
 509 #endif
 510
 511 #ifdef CONFIG_CMDLINE_EDITING
 512
 513 /*
 514  * cmdline-editing related codes from vivi.
 515  * Author: Janghoon Lyu <nandy@mizi.com>
 516  */
 517
 518 #define putnstr(str,n)  do {                    \
 519                 printf ("%.*s", (int)n, str);   \
 520         } while (0)
 521
 522 #define CTL_CH(c)               ((c) - 'a' + 1)
 523
 524 #define MAX_CMDBUF_SIZE         256
 525
 526 #define CTL_BACKSPACE           ('\b')
 527 #define DEL                     ((char)255)
 528 #define DEL7                    ((char)127)
 529 #define CREAD_HIST_CHAR         ('!')
 530
 531 #define getcmd_putch(ch)        putc(ch)
 532 #define getcmd_getch()          getc()
 533 #define getcmd_cbeep()          getcmd_putch('\a')
 534
 535 #define HIST_MAX                20
 536 #define HIST_SIZE               MAX_CMDBUF_SIZE
 537
 538 static int hist_max = 0;
 539 static int hist_add_idx = 0;
 540 static int hist_cur = -1;
 541 unsigned hist_num = 0;
 542
 543 char* hist_list[HIST_MAX];
 544 char hist_lines[HIST_MAX][HIST_SIZE];
 545
 546 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 547
 548 static void hist_init(void)
 549 {
 550         int i;
 551
 552         hist_max = 0;
 553         hist_add_idx = 0;
 554         hist_cur = -1;
 555         hist_num = 0;
 556
 557         for (i = 0; i < HIST_MAX; i++) {
 558                 hist_list[i] = hist_lines[i];
 559                 hist_list[i][0] = '\0';
 560         }
 561 }
 562
 563 static void cread_add_to_hist(char *line)
 564 {
 565         strcpy(hist_list[hist_add_idx], line);
 566
 567         if (++hist_add_idx >= HIST_MAX)
 568                 hist_add_idx = 0;
 569
 570         if (hist_add_idx > hist_max)
 571                 hist_max = hist_add_idx;
 572
 573         hist_num++;
 574 }
 575
 576 static char* hist_prev(void)
 577 {
 578         char *ret;
 579         int old_cur;
 580
 581         if (hist_cur < 0)
 582                 return NULL;
 583
 584         old_cur = hist_cur;
 585         if (--hist_cur < 0)
 586                 hist_cur = hist_max;
 587
 588         if (hist_cur == hist_add_idx) {
 589                 hist_cur = old_cur;
 590                 ret = NULL;
 591         } else
 592                 ret = hist_list[hist_cur];
 593
 594         return (ret);
 595 }
 596
 597 static char* hist_next(void)
 598 {
 599         char *ret;
 600
 601         if (hist_cur < 0)
 602                 return NULL;
 603
 604         if (hist_cur == hist_add_idx)
 605                 return NULL;
 606
 607         if (++hist_cur > hist_max)
 608                 hist_cur = 0;
 609
 610         if (hist_cur == hist_add_idx) {
 611                 ret = "";
 612         } else
 613                 ret = hist_list[hist_cur];
 614
 615         return (ret);
 616 }
 617
 618 #ifndef CONFIG_CMDLINE_EDITING
 619 static void cread_print_hist_list(void)
 620 {
 621         int i;
 622         unsigned long n;
 623
 624         n = hist_num - hist_max;
 625
 626         i = hist_add_idx + 1;
 627         while (1) {
 628                 if (i > hist_max)
 629                         i = 0;
 630                 if (i == hist_add_idx)
 631                         break;
 632                 printf("%s\n", hist_list[i]);
 633                 n++;
 634                 i++;
 635         }
 636 }
 637 #endif /* CONFIG_CMDLINE_EDITING */
 638
 639 #define BEGINNING_OF_LINE() {                   \
 640         while (num) {                           \
 641                 getcmd_putch(CTL_BACKSPACE);    \
 642                 num--;                          \
 643         }                                       \
 644 }
 645
 646 #define ERASE_TO_EOL() {                                \
 647         if (num < eol_num) {                            \
 648                 int tmp;                                \
 649                 for (tmp = num; tmp < eol_num; tmp++)   \
 650                         getcmd_putch(' ');              \
 651                 while (tmp-- > num)                     \
 652                         getcmd_putch(CTL_BACKSPACE);    \
 653                 eol_num = num;                          \
 654         }                                               \
 655 }
 656
 657 #define REFRESH_TO_EOL() {                      \
 658         if (num < eol_num) {                    \
 659                 wlen = eol_num - num;           \
 660                 putnstr(buf + num, wlen);       \
 661                 num = eol_num;                  \
 662         }                                       \
 663 }
 664
 665 static void cread_add_char(char ichar, int insert, unsigned long *num,
 666                unsigned long *eol_num, char *buf, unsigned long len)
 667 {
 668         unsigned long wlen;
 669
 670         /* room ??? */
 671         if (insert || *num == *eol_num) {
 672                 if (*eol_num > len - 1) {
 673                         getcmd_cbeep();
 674                         return;
 675                 }
 676                 (*eol_num)++;
 677         }
 678
 679         if (insert) {
 680                 wlen = *eol_num - *num;
 681                 if (wlen > 1) {
 682                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 683                 }
 684
 685                 buf[*num] = ichar;
 686                 putnstr(buf + *num, wlen);
 687                 (*num)++;
 688                 while (--wlen) {
 689                         getcmd_putch(CTL_BACKSPACE);
 690                 }
 691         } else {
 692                 /* echo the character */
 693                 wlen = 1;
 694                 buf[*num] = ichar;
 695                 putnstr(buf + *num, wlen);
 696                 (*num)++;
 697         }
 698 }
 699
 700 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 701               unsigned long *eol_num, char *buf, unsigned long len)
 702 {
 703         while (strsize--) {
 704                 cread_add_char(*str, insert, num, eol_num, buf, len);
 705                 str++;
 706         }
 707 }
 708
 709 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
 710 {
 711         unsigned long num = 0;
 712         unsigned long eol_num = 0;
 713         unsigned long rlen;
 714         unsigned long wlen;
 715         char ichar;
 716         int insert = 1;
 717         int esc_len = 0;
 718         int rc = 0;
 719         char esc_save[8];
 720
 721         while (1) {
 722                 rlen = 1;
 723 #ifdef CONFIG_BOOT_RETRY_TIME
 724                 while (!tstc()) {       /* while no incoming data */
 725                         if (retry_time >= 0 && get_ticks() > endtime)
 726                                 return (-2);    /* timed out */
 727                 }
 728 #endif
 729
 730                 ichar = getcmd_getch();
 731
 732                 if ((ichar == '\n') || (ichar == '\r')) {
 733                         putc('\n');
 734                         break;
 735                 }
 736
 737                 /*
 738                  * handle standard linux xterm esc sequences for arrow key, etc.
 739                  */
 740                 if (esc_len != 0) {
 741                         if (esc_len == 1) {
 742                                 if (ichar == '[') {
 743                                         esc_save[esc_len] = ichar;
 744                                         esc_len = 2;
 745                                 } else {
 746                                         cread_add_str(esc_save, esc_len, insert,
 747                                                       &num, &eol_num, buf, *len);
 748                                         esc_len = 0;
 749                                 }
 750                                 continue;
 751                         }
 752
 753                         switch (ichar) {
 754
 755                         case 'D':       /* <- key */
 756                                 ichar = CTL_CH('b');
 757                                 esc_len = 0;
 758                                 break;
 759                         case 'C':       /* -> key */
 760                                 ichar = CTL_CH('f');
 761                                 esc_len = 0;
 762                                 break;  /* pass off to ^F handler */
 763                         case 'H':       /* Home key */
 764                                 ichar = CTL_CH('a');
 765                                 esc_len = 0;
 766                                 break;  /* pass off to ^A handler */
 767                         case 'A':       /* up arrow */
 768                                 ichar = CTL_CH('p');
 769                                 esc_len = 0;
 770                                 break;  /* pass off to ^P handler */
 771                         case 'B':       /* down arrow */
 772                                 ichar = CTL_CH('n');
 773                                 esc_len = 0;
 774                                 break;  /* pass off to ^N handler */
 775                         default:
 776                                 esc_save[esc_len++] = ichar;
 777                                 cread_add_str(esc_save, esc_len, insert,
 778                                               &num, &eol_num, buf, *len);
 779                                 esc_len = 0;
 780                                 continue;
 781                         }
 782                 }
 783
 784                 switch (ichar) {
 785                 case 0x1b:
 786                         if (esc_len == 0) {
 787                                 esc_save[esc_len] = ichar;
 788                                 esc_len = 1;
 789                         } else {
 790                                 puts("impossible condition #876\n");
 791                                 esc_len = 0;
 792                         }
 793                         break;
 794
 795                 case CTL_CH('a'):
 796                         BEGINNING_OF_LINE();
 797                         break;
 798                 case CTL_CH('c'):       /* ^C - break */
 799                         *buf = '\0';    /* discard input */
 800                         return (-1);
 801                 case CTL_CH('f'):
 802                         if (num < eol_num) {
 803                                 getcmd_putch(buf[num]);
 804                                 num++;
 805                         }
 806                         break;
 807                 case CTL_CH('b'):
 808                         if (num) {
 809                                 getcmd_putch(CTL_BACKSPACE);
 810                                 num--;
 811                         }
 812                         break;
 813                 case CTL_CH('d'):
 814                         if (num < eol_num) {
 815                                 wlen = eol_num - num - 1;
 816                                 if (wlen) {
 817                                         memmove(&buf[num], &buf[num+1], wlen);
 818                                         putnstr(buf + num, wlen);
 819                                 }
 820
 821                                 getcmd_putch(' ');
 822                                 do {
 823                                         getcmd_putch(CTL_BACKSPACE);
 824                                 } while (wlen--);
 825                                 eol_num--;
 826                         }
 827                         break;
 828                 case CTL_CH('k'):
 829                         ERASE_TO_EOL();
 830                         break;
 831                 case CTL_CH('e'):
 832                         REFRESH_TO_EOL();
 833                         break;
 834                 case CTL_CH('o'):
 835                         insert = !insert;
 836                         break;
 837                 case CTL_CH('x'):
 838                 case CTL_CH('u'):
 839                         BEGINNING_OF_LINE();
 840                         ERASE_TO_EOL();
 841                         break;
 842                 case DEL:
 843                 case DEL7:
 844                 case 8:
 845                         if (num) {
 846                                 wlen = eol_num - num;
 847                                 num--;
 848                                 memmove(&buf[num], &buf[num+1], wlen);
 849                                 getcmd_putch(CTL_BACKSPACE);
 850                                 putnstr(buf + num, wlen);
 851                                 getcmd_putch(' ');
 852                                 do {
 853                                         getcmd_putch(CTL_BACKSPACE);
 854                                 } while (wlen--);
 855                                 eol_num--;
 856                         }
 857                         break;
 858                 case CTL_CH('p'):
 859                 case CTL_CH('n'):
 860                 {
 861                         char * hline;
 862
 863                         esc_len = 0;
 864
 865                         if (ichar == CTL_CH('p'))
 866                                 hline = hist_prev();
 867                         else
 868                                 hline = hist_next();
 869
 870                         if (!hline) {
 871                                 getcmd_cbeep();
 872                                 continue;
 873                         }
 874
 875                         /* nuke the current line */
 876                         /* first, go home */
 877                         BEGINNING_OF_LINE();
 878
 879                         /* erase to end of line */
 880                         ERASE_TO_EOL();
 881
 882                         /* copy new line into place and display */
 883                         strcpy(buf, hline);
 884                         eol_num = strlen(buf);
 885                         REFRESH_TO_EOL();
 886                         continue;
 887                 }
 888 #ifdef CONFIG_AUTO_COMPLETE
 889                 case '\t': {
 890                         int num2, col;
 891
 892                         /* do not autocomplete when in the middle */
 893                         if (num < eol_num) {
 894                                 getcmd_cbeep();
 895                                 break;
 896                         }
 897
 898                         buf[num] = '\0';
 899                         col = strlen(prompt) + eol_num;
 900                         num2 = num;
 901                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 902                                 col = num2 - num;
 903                                 num += col;
 904                                 eol_num += col;
 905                         }
 906                         break;
 907                 }
 908 #endif
 909                 default:
 910                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 911                         break;
 912                 }
 913         }
 914         *len = eol_num;
 915         buf[eol_num] = '\0';    /* lose the newline */
 916
 917         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 918                 cread_add_to_hist(buf);
 919         hist_cur = hist_add_idx;
 920
 921         return (rc);
 922 }
 923
 924 #endif /* CONFIG_CMDLINE_EDITING */
 925
 926 /****************************************************************************/
 927
 928 /*
 929  * Prompt for input and read a line.
 930  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 931  * time out when time goes past endtime (timebase time in ticks).
 932  * Return:      number of read characters
 933  *              -1 if break
 934  *              -2 if timed out
 935  */
 936 int readline (const char *const prompt)
 937 {
 938         return readline_into_buffer(prompt, console_buffer);
 939 }
 940
 941
 942 int readline_into_buffer (const char *const prompt, char * buffer)
 943 {
 944         char *p = buffer;
 945 #ifdef CONFIG_CMDLINE_EDITING
 946         unsigned int len=MAX_CMDBUF_SIZE;
 947         int rc;
 948         static int initted = 0;
 949
 950         /*
 951          * History uses a global array which is not
 952          * writable until after relocation to RAM.
 953          * Revert to non-history version if still
 954          * running from flash.
 955          */
 956         if (gd->flags & GD_FLG_RELOC) {
 957                 if (!initted) {
 958                         hist_init();
 959                         initted = 1;
 960                 }
 961
 962                 puts (prompt);
 963
 964                 rc = cread_line(prompt, p, &len);
 965                 return rc < 0 ? rc : len;
 966
 967         } else {
 968 #endif  /* CONFIG_CMDLINE_EDITING */
 969         char * p_buf = p;
 970         int     n = 0;                          /* buffer index         */
 971         int     plen = 0;                       /* prompt length        */
 972         int     col;                            /* output column cnt    */
 973         char    c;
 974
 975         /* print prompt */
 976         if (prompt) {
 977                 plen = strlen (prompt);
 978                 puts (prompt);
 979         }
 980         col = plen;
 981
 982         for (;;) {
 983 #ifdef CONFIG_BOOT_RETRY_TIME
 984                 while (!tstc()) {       /* while no incoming data */
 985                         if (retry_time >= 0 && get_ticks() > endtime)
 986                                 return (-2);    /* timed out */
 987                 }
 988 #endif
 989                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 990
 991 #ifdef CONFIG_SHOW_ACTIVITY
 992                 while (!tstc()) {
 993                         extern void show_activity(int arg);
 994                         show_activity(0);
 995                 }
 996 #endif
 997                 c = getc();
 998
 999                 /*
1000                  * Special character handling
1001                  */
1002                 switch (c) {
1003                 case '\r':                              /* Enter                */
1004                 case '\n':
1005                         *p = '\0';
1006                         puts ("\r\n");
1007                         return (p - p_buf);
1008
1009                 case '\0':                              /* nul                  */
1010                         continue;
1011
1012                 case 0x03:                              /* ^C - break           */
1013                         p_buf[0] = '\0';        /* discard input */
1014                         return (-1);
1015
1016                 case 0x15:                              /* ^U - erase line      */
1017                         while (col > plen) {
1018                                 puts (erase_seq);
1019                                 --col;
1020                         }
1021                         p = p_buf;
1022                         n = 0;
1023                         continue;
1024
1025                 case 0x17:                              /* ^W - erase word      */
1026                         p=delete_char(p_buf, p, &col, &n, plen);
1027                         while ((n > 0) && (*p != ' ')) {
1028                                 p=delete_char(p_buf, p, &col, &n, plen);
1029                         }
1030                         continue;
1031
1032                 case 0x08:                              /* ^H  - backspace      */
1033                 case 0x7F:                              /* DEL - backspace      */
1034                         p=delete_char(p_buf, p, &col, &n, plen);
1035                         continue;
1036
1037                 default:
1038                         /*
1039                          * Must be a normal character then
1040                          */
1041                         if (n < CFG_CBSIZE-2) {
1042                                 if (c == '\t') {        /* expand TABs          */
1043 #ifdef CONFIG_AUTO_COMPLETE
1044                                         /* if auto completion triggered just continue */
1045                                         *p = '\0';
1046                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1047                                                 p = p_buf + n;  /* reset */
1048                                                 continue;
1049                                         }
1050 #endif
1051                                         puts (tab_seq+(col&07));
1052                                         col += 8 - (col&07);
1053                                 } else {
1054                                         ++col;          /* echo input           */
1055                                         putc (c);
1056                                 }
1057                                 *p++ = c;
1058                                 ++n;
1059                         } else {                        /* Buffer full          */
1060                                 putc ('\a');
1061                         }
1062                 }
1063         }
1064 #ifdef CONFIG_CMDLINE_EDITING
1065         }
1066 #endif
1067 }
1068
1069 /****************************************************************************/
1070
1071 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1072 {
1073         char *s;
1074
1075         if (*np == 0) {
1076                 return (p);
1077         }
1078
1079         if (*(--p) == '\t') {                   /* will retype the whole line   */
1080                 while (*colp > plen) {
1081                         puts (erase_seq);
1082                         (*colp)--;
1083                 }
1084                 for (s=buffer; s<p; ++s) {
1085                         if (*s == '\t') {
1086                                 puts (tab_seq+((*colp) & 07));
1087                                 *colp += 8 - ((*colp) & 07);
1088                         } else {
1089                                 ++(*colp);
1090                                 putc (*s);
1091                         }
1092                 }
1093         } else {
1094                 puts (erase_seq);
1095                 (*colp)--;
1096         }
1097         (*np)--;
1098         return (p);
1099 }
1100
1101 /****************************************************************************/
1102
1103 int parse_line (char *line, char *argv[])
1104 {
1105         int nargs = 0;
1106
1107 #ifdef DEBUG_PARSER
1108         printf ("parse_line: \"%s\"\n", line);
1109 #endif
1110         while (nargs < CFG_MAXARGS) {
1111
1112                 /* skip any white space */
1113                 while ((*line == ' ') || (*line == '\t')) {
1114                         ++line;
1115                 }
1116
1117                 if (*line == '\0') {    /* end of line, no more args    */
1118                         argv[nargs] = NULL;
1119 #ifdef DEBUG_PARSER
1120                 printf ("parse_line: nargs=%d\n", nargs);
1121 #endif
1122                         return (nargs);
1123                 }
1124
1125                 argv[nargs++] = line;   /* begin of argument string     */
1126
1127                 /* find end of string */
1128                 while (*line && (*line != ' ') && (*line != '\t')) {
1129                         ++line;
1130                 }
1131
1132                 if (*line == '\0') {    /* end of line, no more args    */
1133                         argv[nargs] = NULL;
1134 #ifdef DEBUG_PARSER
1135                 printf ("parse_line: nargs=%d\n", nargs);
1136 #endif
1137                         return (nargs);
1138                 }
1139
1140                 *line++ = '\0';         /* terminate current arg         */
1141         }
1142
1143         printf ("** Too many args (max. %d) **\n", CFG_MAXARGS);
1144
1145 #ifdef DEBUG_PARSER
1146         printf ("parse_line: nargs=%d\n", nargs);
1147 #endif
1148         return (nargs);
1149 }
1150
1151 /****************************************************************************/
1152
1153 static void process_macros (const char *input, char *output)
1154 {
1155         char c, prev;
1156         const char *varname_start = NULL;
1157         int inputcnt = strlen (input);
1158         int outputcnt = CFG_CBSIZE;
1159         int state = 0;          /* 0 = waiting for '$'  */
1160
1161         /* 1 = waiting for '(' or '{' */
1162         /* 2 = waiting for ')' or '}' */
1163         /* 3 = waiting for '''  */
1164 #ifdef DEBUG_PARSER
1165         char *output_start = output;
1166
1167         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1168                 input);
1169 #endif
1170
1171         prev = '\0';            /* previous character   */
1172
1173         while (inputcnt && outputcnt) {
1174                 c = *input++;
1175                 inputcnt--;
1176
1177                 if (state != 3) {
1178                         /* remove one level of escape characters */
1179                         if ((c == '\\') && (prev != '\\')) {
1180                                 if (inputcnt-- == 0)
1181                                         break;
1182                                 prev = c;
1183                                 c = *input++;
1184                         }
1185                 }
1186
1187                 switch (state) {
1188                 case 0: /* Waiting for (unescaped) $    */
1189                         if ((c == '\'') && (prev != '\\')) {
1190                                 state = 3;
1191                                 break;
1192                         }
1193                         if ((c == '$') && (prev != '\\')) {
1194                                 state++;
1195                         } else {
1196                                 *(output++) = c;
1197                                 outputcnt--;
1198                         }
1199                         break;
1200                 case 1: /* Waiting for (        */
1201                         if (c == '(' || c == '{') {
1202                                 state++;
1203                                 varname_start = input;
1204                         } else {
1205                                 state = 0;
1206                                 *(output++) = '$';
1207                                 outputcnt--;
1208
1209                                 if (outputcnt) {
1210                                         *(output++) = c;
1211                                         outputcnt--;
1212                                 }
1213                         }
1214                         break;
1215                 case 2: /* Waiting for )        */
1216                         if (c == ')' || c == '}') {
1217                                 int i;
1218                                 char envname[CFG_CBSIZE], *envval;
1219                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1220
1221                                 /* Get the varname */
1222                                 for (i = 0; i < envcnt; i++) {
1223                                         envname[i] = varname_start[i];
1224                                 }
1225                                 envname[i] = 0;
1226
1227                                 /* Get its value */
1228                                 envval = getenv (envname);
1229
1230                                 /* Copy into the line if it exists */
1231                                 if (envval != NULL)
1232                                         while ((*envval) && outputcnt) {
1233                                                 *(output++) = *(envval++);
1234                                                 outputcnt--;
1235                                         }
1236                                 /* Look for another '$' */
1237                                 state = 0;
1238                         }
1239                         break;
1240                 case 3: /* Waiting for '        */
1241                         if ((c == '\'') && (prev != '\\')) {
1242                                 state = 0;
1243                         } else {
1244                                 *(output++) = c;
1245                                 outputcnt--;
1246                         }
1247                         break;
1248                 }
1249                 prev = c;
1250         }
1251
1252         if (outputcnt)
1253                 *output = 0;
1254         else
1255                 *(output - 1) = 0;
1256
1257 #ifdef DEBUG_PARSER
1258         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1259                 strlen (output_start), output_start);
1260 #endif
1261 }
1262
1263 /****************************************************************************
1264  * returns:
1265  *      1  - command executed, repeatable
1266  *      0  - command executed but not repeatable, interrupted commands are
1267  *           always considered not repeatable
1268  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1269  *           (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is
1270  *           considered unrecognized)
1271  *
1272  * WARNING:
1273  *
1274  * We must create a temporary copy of the command since the command we get
1275  * may be the result from getenv(), which returns a pointer directly to
1276  * the environment data, which may change magicly when the command we run
1277  * creates or modifies environment variables (like "bootp" does).
1278  */
1279
1280 int run_command (const char *cmd, int flag)
1281 {
1282         cmd_tbl_t *cmdtp;
1283         char cmdbuf[CFG_CBSIZE];        /* working copy of cmd          */
1284         char *token;                    /* start of token in cmdbuf     */
1285         char *sep;                      /* end of token (separator) in cmdbuf */
1286         char finaltoken[CFG_CBSIZE];
1287         char *str = cmdbuf;
1288         char *argv[CFG_MAXARGS + 1];    /* NULL terminated      */
1289         int argc, inquotes;
1290         int repeatable = 1;
1291         int rc = 0;
1292
1293 #ifdef DEBUG_PARSER
1294         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1295         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1296         puts ("\"\n");
1297 #endif
1298
1299         clear_ctrlc();          /* forget any previous Control C */
1300
1301         if (!cmd || !*cmd) {
1302                 return -1;      /* empty command */
1303         }
1304
1305         if (strlen(cmd) >= CFG_CBSIZE) {
1306                 puts ("## Command too long!\n");
1307                 return -1;
1308         }
1309
1310         strcpy (cmdbuf, cmd);
1311
1312         /* Process separators and check for invalid
1313          * repeatable commands
1314          */
1315
1316 #ifdef DEBUG_PARSER
1317         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1318 #endif
1319         while (*str) {
1320
1321                 /*
1322                  * Find separator, or string end
1323                  * Allow simple escape of ';' by writing "\;"
1324                  */
1325                 for (inquotes = 0, sep = str; *sep; sep++) {
1326                         if ((*sep=='\'') &&
1327                             (*(sep-1) != '\\'))
1328                                 inquotes=!inquotes;
1329
1330                         if (!inquotes &&
1331                             (*sep == ';') &&    /* separator            */
1332                             ( sep != str) &&    /* past string start    */
1333                             (*(sep-1) != '\\')) /* and NOT escaped      */
1334                                 break;
1335                 }
1336
1337                 /*
1338                  * Limit the token to data between separators
1339                  */
1340                 token = str;
1341                 if (*sep) {
1342                         str = sep + 1;  /* start of command for next pass */
1343                         *sep = '\0';
1344                 }
1345                 else
1346                         str = sep;      /* no more commands for next pass */
1347 #ifdef DEBUG_PARSER
1348                 printf ("token: \"%s\"\n", token);
1349 #endif
1350
1351                 /* find macros in this token and replace them */
1352                 process_macros (token, finaltoken);
1353
1354                 /* Extract arguments */
1355                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1356                         rc = -1;        /* no command at all */
1357                         continue;
1358                 }
1359
1360                 /* Look up command in command table */
1361                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1362                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1363                         rc = -1;        /* give up after bad command */
1364                         continue;
1365                 }
1366
1367                 /* found - check max args */
1368                 if (argc > cmdtp->maxargs) {
1369                         printf ("Usage:\n%s\n", cmdtp->usage);
1370                         rc = -1;
1371                         continue;
1372                 }
1373
1374 #if defined(CONFIG_CMD_BOOTD)
1375                 /* avoid "bootd" recursion */
1376                 if (cmdtp->cmd == do_bootd) {
1377 #ifdef DEBUG_PARSER
1378                         printf ("[%s]\n", finaltoken);
1379 #endif
1380                         if (flag & CMD_FLAG_BOOTD) {
1381                                 puts ("'bootd' recursion detected\n");
1382                                 rc = -1;
1383                                 continue;
1384                         } else {
1385                                 flag |= CMD_FLAG_BOOTD;
1386                         }
1387                 }
1388 #endif
1389
1390                 /* OK - call function to do the command */
1391                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1392                         rc = -1;
1393                 }
1394
1395                 repeatable &= cmdtp->repeatable;
1396
1397                 /* Did the user stop this? */
1398                 if (had_ctrlc ())
1399                         return -1;      /* if stopped then not repeatable */
1400         }
1401
1402         return rc ? rc : repeatable;
1403 }
1404
1405 /****************************************************************************/
1406
1407 #if defined(CONFIG_CMD_RUN)
1408 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1409 {
1410         int i;
1411
1412         if (argc < 2) {
1413                 printf ("Usage:\n%s\n", cmdtp->usage);
1414                 return 1;
1415         }
1416
1417         for (i=1; i<argc; ++i) {
1418                 char *arg;
1419
1420                 if ((arg = getenv (argv[i])) == NULL) {
1421                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1422                         return 1;
1423                 }
1424 #ifndef CFG_HUSH_PARSER
1425                 if (run_command (arg, flag) == -1)
1426                         return 1;
1427 #else
1428                 if (parse_string_outer(arg,
1429                     FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1430                         return 1;
1431 #endif
1432         }
1433         return 0;
1434 }
1435 #endif