common/main.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Add to readline cmdline-editing by
   6  * (C) Copyright 2005
   7  * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /* #define      DEBUG   */
  29
  30 #include <common.h>
  31 #include <watchdog.h>
  32 #include <command.h>
  33 #include <version.h>
  34 #ifdef CONFIG_MODEM_SUPPORT
  35 #include <malloc.h>             /* for free() prototype */
  36 #endif
  37
  38 #ifdef CONFIG_SYS_HUSH_PARSER
  39 #include <hush.h>
  40 #endif
  41
  42 #include <post.h>
  43 #include <linux/ctype.h>
  44 #include <menu.h>
  45
  46 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
  47 DECLARE_GLOBAL_DATA_PTR;
  48 #endif
  49
  50 /*
  51  * Board-specific Platform code can reimplement show_boot_progress () if needed
  52  */
  53 void inline __show_boot_progress (int val) {}
  54 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  55
  56 #if defined(CONFIG_UPDATE_TFTP)
  57 int update_tftp (ulong addr);
  58 #endif /* CONFIG_UPDATE_TFTP */
  59
  60 #define MAX_DELAY_STOP_STR 32
  61
  62 #undef DEBUG_PARSER
  63
  64 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
  65
  66 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  67 static const char erase_seq[] = "\b \b";                /* erase sequence       */
  68 static const char   tab_seq[] = "        ";             /* used to expand TABs  */
  69
  70 #ifdef CONFIG_BOOT_RETRY_TIME
  71 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  72 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  73 #endif
  74
  75 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  76
  77 #ifndef CONFIG_BOOT_RETRY_MIN
  78 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  79 #endif
  80
  81 #ifdef CONFIG_MODEM_SUPPORT
  82 int do_mdm_init = 0;
  83 extern void mdm_init(void); /* defined in board.c */
  84 #endif
  85
  86 /***************************************************************************
  87  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  88  * returns: 0 -  no key string, allow autoboot 1 - got key string, abort
  89  */
  90 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  91 # if defined(CONFIG_AUTOBOOT_KEYED)
  92 #ifndef CONFIG_MENU
  93 static inline
  94 #endif
  95 int abortboot(int bootdelay)
  96 {
  97         int abort = 0;
  98         uint64_t etime = endtick(bootdelay);
  99         struct {
 100                 char* str;
 101                 u_int len;
 102                 int retry;
 103         }
 104         delaykey [] = {
 105                 { str: getenv ("bootdelaykey"),  retry: 1 },
 106                 { str: getenv ("bootdelaykey2"), retry: 1 },
 107                 { str: getenv ("bootstopkey"),   retry: 0 },
 108                 { str: getenv ("bootstopkey2"),  retry: 0 },
 109         };
 110
 111         char presskey [MAX_DELAY_STOP_STR];
 112         u_int presskey_len = 0;
 113         u_int presskey_max = 0;
 114         u_int i;
 115
 116 #  ifdef CONFIG_AUTOBOOT_PROMPT
 117         printf(CONFIG_AUTOBOOT_PROMPT);
 118 #  endif
 119
 120 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 121         if (delaykey[0].str == NULL)
 122                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 123 #  endif
 124 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 125         if (delaykey[1].str == NULL)
 126                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 127 #  endif
 128 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 129         if (delaykey[2].str == NULL)
 130                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 131 #  endif
 132 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 133         if (delaykey[3].str == NULL)
 134                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 135 #  endif
 136
 137         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 138                 delaykey[i].len = delaykey[i].str == NULL ?
 139                                     0 : strlen (delaykey[i].str);
 140                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 141                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 142
 143                 presskey_max = presskey_max > delaykey[i].len ?
 144                                     presskey_max : delaykey[i].len;
 145
 146 #  if DEBUG_BOOTKEYS
 147                 printf("%s key:<%s>\n",
 148                        delaykey[i].retry ? "delay" : "stop",
 149                        delaykey[i].str ? delaykey[i].str : "NULL");
 150 #  endif
 151         }
 152
 153         /* In order to keep up with incoming data, check timeout only
 154          * when catch up.
 155          */
 156         do {
 157                 if (tstc()) {
 158                         if (presskey_len < presskey_max) {
 159                                 presskey [presskey_len ++] = getc();
 160                         }
 161                         else {
 162                                 for (i = 0; i < presskey_max - 1; i ++)
 163                                         presskey [i] = presskey [i + 1];
 164
 165                                 presskey [i] = getc();
 166                         }
 167                 }
 168
 169                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 170                         if (delaykey[i].len > 0 &&
 171                             presskey_len >= delaykey[i].len &&
 172                             memcmp (presskey + presskey_len - delaykey[i].len,
 173                                     delaykey[i].str,
 174                                     delaykey[i].len) == 0) {
 175 #  if DEBUG_BOOTKEYS
 176                                 printf("got %skey\n",
 177                                        delaykey[i].retry ? "delay" : "stop");
 178 #  endif
 179
 180 #  ifdef CONFIG_BOOT_RETRY_TIME
 181                                 /* don't retry auto boot */
 182                                 if (! delaykey[i].retry)
 183                                         retry_time = -1;
 184 #  endif
 185                                 abort = 1;
 186                         }
 187                 }
 188         } while (!abort && get_ticks() <= etime);
 189
 190 #  if DEBUG_BOOTKEYS
 191         if (!abort)
 192                 puts("key timeout\n");
 193 #  endif
 194
 195 #ifdef CONFIG_SILENT_CONSOLE
 196         if (abort)
 197                 gd->flags &= ~GD_FLG_SILENT;
 198 #endif
 199
 200         return abort;
 201 }
 202
 203 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 204
 205 #ifdef CONFIG_MENUKEY
 206 static int menukey = 0;
 207 #endif
 208
 209 #ifndef CONFIG_MENU
 210 static inline
 211 #endif
 212 int abortboot(int bootdelay)
 213 {
 214         int abort = 0;
 215
 216 #ifdef CONFIG_MENUPROMPT
 217         printf(CONFIG_MENUPROMPT);
 218 #else
 219         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 220 #endif
 221
 222 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 223         /*
 224          * Check if key already pressed
 225          * Don't check if bootdelay < 0
 226          */
 227         if (bootdelay >= 0) {
 228                 if (tstc()) {   /* we got a key press   */
 229                         (void) getc();  /* consume input        */
 230                         puts ("\b\b\b 0");
 231                         abort = 1;      /* don't auto boot      */
 232                 }
 233         }
 234 #endif
 235
 236         while ((bootdelay > 0) && (!abort)) {
 237                 int i;
 238
 239                 --bootdelay;
 240                 /* delay 100 * 10ms */
 241                 for (i=0; !abort && i<100; ++i) {
 242                         if (tstc()) {   /* we got a key press   */
 243                                 abort  = 1;     /* don't auto boot      */
 244                                 bootdelay = 0;  /* no more delay        */
 245 # ifdef CONFIG_MENUKEY
 246                                 menukey = getc();
 247 # else
 248                                 (void) getc();  /* consume input        */
 249 # endif
 250                                 break;
 251                         }
 252                         udelay(10000);
 253                 }
 254
 255                 printf("\b\b\b%2d ", bootdelay);
 256         }
 257
 258         putc('\n');
 259
 260 #ifdef CONFIG_SILENT_CONSOLE
 261         if (abort)
 262                 gd->flags &= ~GD_FLG_SILENT;
 263 #endif
 264
 265         return abort;
 266 }
 267 # endif /* CONFIG_AUTOBOOT_KEYED */
 268 #endif  /* CONFIG_BOOTDELAY >= 0  */
 269
 270 /*
 271  * Return 0 on success, or != 0 on error.
 272  */
 273 #ifndef CONFIG_CMD_PXE
 274 static inline
 275 #endif
 276 int run_command2(const char *cmd, int flag)
 277 {
 278 #ifndef CONFIG_SYS_HUSH_PARSER
 279         /*
 280          * run_command can return 0 or 1 for success, so clean up its result.
 281          */
 282         if (run_command(cmd, flag) == -1)
 283                 return 1;
 284
 285         return 0;
 286 #else
 287         return parse_string_outer(cmd,
 288                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
 289 #endif
 290 }
 291
 292 /****************************************************************************/
 293
 294 void main_loop (void)
 295 {
 296 #ifndef CONFIG_SYS_HUSH_PARSER
 297         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
 298         int len;
 299         int rc = 1;
 300         int flag;
 301 #endif
 302
 303 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 304         char *s;
 305         int bootdelay;
 306 #endif
 307 #ifdef CONFIG_PREBOOT
 308         char *p;
 309 #endif
 310 #ifdef CONFIG_BOOTCOUNT_LIMIT
 311         unsigned long bootcount = 0;
 312         unsigned long bootlimit = 0;
 313         char *bcs;
 314         char bcs_set[16];
 315 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 316
 317 #ifdef CONFIG_BOOTCOUNT_LIMIT
 318         bootcount = bootcount_load();
 319         bootcount++;
 320         bootcount_store (bootcount);
 321         sprintf (bcs_set, "%lu", bootcount);
 322         setenv ("bootcount", bcs_set);
 323         bcs = getenv ("bootlimit");
 324         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 325 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 326
 327 #ifdef CONFIG_MODEM_SUPPORT
 328         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 329         if (do_mdm_init) {
 330                 char *str = strdup(getenv("mdm_cmd"));
 331                 setenv ("preboot", str);  /* set or delete definition */
 332                 if (str != NULL)
 333                         free (str);
 334                 mdm_init(); /* wait for modem connection */
 335         }
 336 #endif  /* CONFIG_MODEM_SUPPORT */
 337
 338 #ifdef CONFIG_VERSION_VARIABLE
 339         {
 340                 setenv ("ver", version_string);  /* set version variable */
 341         }
 342 #endif /* CONFIG_VERSION_VARIABLE */
 343
 344 #ifdef CONFIG_SYS_HUSH_PARSER
 345         u_boot_hush_start ();
 346 #endif
 347
 348 #if defined(CONFIG_HUSH_INIT_VAR)
 349         hush_init_var ();
 350 #endif
 351
 352 #ifdef CONFIG_PREBOOT
 353         if ((p = getenv ("preboot")) != NULL) {
 354 # ifdef CONFIG_AUTOBOOT_KEYED
 355                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 356 # endif
 357
 358                 run_command2(p, 0);
 359
 360 # ifdef CONFIG_AUTOBOOT_KEYED
 361                 disable_ctrlc(prev);    /* restore Control C checking */
 362 # endif
 363         }
 364 #endif /* CONFIG_PREBOOT */
 365
 366 #if defined(CONFIG_UPDATE_TFTP)
 367         update_tftp (0UL);
 368 #endif /* CONFIG_UPDATE_TFTP */
 369
 370 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 371         s = getenv ("bootdelay");
 372         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 373
 374         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 375
 376 #if defined(CONFIG_MENU_SHOW)
 377         bootdelay = menu_show(bootdelay);
 378 #endif
 379 # ifdef CONFIG_BOOT_RETRY_TIME
 380         init_cmd_timeout ();
 381 # endif /* CONFIG_BOOT_RETRY_TIME */
 382
 383 #ifdef CONFIG_POST
 384         if (gd->flags & GD_FLG_POSTFAIL) {
 385                 s = getenv("failbootcmd");
 386         }
 387         else
 388 #endif /* CONFIG_POST */
 389 #ifdef CONFIG_BOOTCOUNT_LIMIT
 390         if (bootlimit && (bootcount > bootlimit)) {
 391                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 392                         (unsigned)bootlimit);
 393                 s = getenv ("altbootcmd");
 394         }
 395         else
 396 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 397                 s = getenv ("bootcmd");
 398
 399         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 400
 401         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 402 # ifdef CONFIG_AUTOBOOT_KEYED
 403                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 404 # endif
 405
 406                 run_command2(s, 0);
 407
 408 # ifdef CONFIG_AUTOBOOT_KEYED
 409                 disable_ctrlc(prev);    /* restore Control C checking */
 410 # endif
 411         }
 412
 413 # ifdef CONFIG_MENUKEY
 414         if (menukey == CONFIG_MENUKEY) {
 415                 s = getenv("menucmd");
 416                 if (s)
 417                         run_command2(s, 0);
 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                 int timeout)
 694 {
 695         unsigned long num = 0;
 696         unsigned long eol_num = 0;
 697         unsigned long wlen;
 698         char ichar;
 699         int insert = 1;
 700         int esc_len = 0;
 701         char esc_save[8];
 702         int init_len = strlen(buf);
 703         int first = 1;
 704
 705         if (init_len)
 706                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
 707
 708         while (1) {
 709 #ifdef CONFIG_BOOT_RETRY_TIME
 710                 while (!tstc()) {       /* while no incoming data */
 711                         if (retry_time >= 0 && get_ticks() > endtime)
 712                                 return (-2);    /* timed out */
 713                         WATCHDOG_RESET();
 714                 }
 715 #endif
 716                 if (first && timeout) {
 717                         uint64_t etime = endtick(timeout);
 718
 719                         while (!tstc()) {       /* while no incoming data */
 720                                 if (get_ticks() >= etime)
 721                                         return -2;      /* timed out */
 722                                 WATCHDOG_RESET();
 723                         }
 724                         first = 0;
 725                 }
 726
 727                 ichar = getcmd_getch();
 728
 729                 if ((ichar == '\n') || (ichar == '\r')) {
 730                         putc('\n');
 731                         break;
 732                 }
 733
 734                 /*
 735                  * handle standard linux xterm esc sequences for arrow key, etc.
 736                  */
 737                 if (esc_len != 0) {
 738                         if (esc_len == 1) {
 739                                 if (ichar == '[') {
 740                                         esc_save[esc_len] = ichar;
 741                                         esc_len = 2;
 742                                 } else {
 743                                         cread_add_str(esc_save, esc_len, insert,
 744                                                       &num, &eol_num, buf, *len);
 745                                         esc_len = 0;
 746                                 }
 747                                 continue;
 748                         }
 749
 750                         switch (ichar) {
 751
 752                         case 'D':       /* <- key */
 753                                 ichar = CTL_CH('b');
 754                                 esc_len = 0;
 755                                 break;
 756                         case 'C':       /* -> key */
 757                                 ichar = CTL_CH('f');
 758                                 esc_len = 0;
 759                                 break;  /* pass off to ^F handler */
 760                         case 'H':       /* Home key */
 761                                 ichar = CTL_CH('a');
 762                                 esc_len = 0;
 763                                 break;  /* pass off to ^A handler */
 764                         case 'A':       /* up arrow */
 765                                 ichar = CTL_CH('p');
 766                                 esc_len = 0;
 767                                 break;  /* pass off to ^P handler */
 768                         case 'B':       /* down arrow */
 769                                 ichar = CTL_CH('n');
 770                                 esc_len = 0;
 771                                 break;  /* pass off to ^N handler */
 772                         default:
 773                                 esc_save[esc_len++] = ichar;
 774                                 cread_add_str(esc_save, esc_len, insert,
 775                                               &num, &eol_num, buf, *len);
 776                                 esc_len = 0;
 777                                 continue;
 778                         }
 779                 }
 780
 781                 switch (ichar) {
 782                 case 0x1b:
 783                         if (esc_len == 0) {
 784                                 esc_save[esc_len] = ichar;
 785                                 esc_len = 1;
 786                         } else {
 787                                 puts("impossible condition #876\n");
 788                                 esc_len = 0;
 789                         }
 790                         break;
 791
 792                 case CTL_CH('a'):
 793                         BEGINNING_OF_LINE();
 794                         break;
 795                 case CTL_CH('c'):       /* ^C - break */
 796                         *buf = '\0';    /* discard input */
 797                         return (-1);
 798                 case CTL_CH('f'):
 799                         if (num < eol_num) {
 800                                 getcmd_putch(buf[num]);
 801                                 num++;
 802                         }
 803                         break;
 804                 case CTL_CH('b'):
 805                         if (num) {
 806                                 getcmd_putch(CTL_BACKSPACE);
 807                                 num--;
 808                         }
 809                         break;
 810                 case CTL_CH('d'):
 811                         if (num < eol_num) {
 812                                 wlen = eol_num - num - 1;
 813                                 if (wlen) {
 814                                         memmove(&buf[num], &buf[num+1], wlen);
 815                                         putnstr(buf + num, wlen);
 816                                 }
 817
 818                                 getcmd_putch(' ');
 819                                 do {
 820                                         getcmd_putch(CTL_BACKSPACE);
 821                                 } while (wlen--);
 822                                 eol_num--;
 823                         }
 824                         break;
 825                 case CTL_CH('k'):
 826                         ERASE_TO_EOL();
 827                         break;
 828                 case CTL_CH('e'):
 829                         REFRESH_TO_EOL();
 830                         break;
 831                 case CTL_CH('o'):
 832                         insert = !insert;
 833                         break;
 834                 case CTL_CH('x'):
 835                 case CTL_CH('u'):
 836                         BEGINNING_OF_LINE();
 837                         ERASE_TO_EOL();
 838                         break;
 839                 case DEL:
 840                 case DEL7:
 841                 case 8:
 842                         if (num) {
 843                                 wlen = eol_num - num;
 844                                 num--;
 845                                 memmove(&buf[num], &buf[num+1], wlen);
 846                                 getcmd_putch(CTL_BACKSPACE);
 847                                 putnstr(buf + num, wlen);
 848                                 getcmd_putch(' ');
 849                                 do {
 850                                         getcmd_putch(CTL_BACKSPACE);
 851                                 } while (wlen--);
 852                                 eol_num--;
 853                         }
 854                         break;
 855                 case CTL_CH('p'):
 856                 case CTL_CH('n'):
 857                 {
 858                         char * hline;
 859
 860                         esc_len = 0;
 861
 862                         if (ichar == CTL_CH('p'))
 863                                 hline = hist_prev();
 864                         else
 865                                 hline = hist_next();
 866
 867                         if (!hline) {
 868                                 getcmd_cbeep();
 869                                 continue;
 870                         }
 871
 872                         /* nuke the current line */
 873                         /* first, go home */
 874                         BEGINNING_OF_LINE();
 875
 876                         /* erase to end of line */
 877                         ERASE_TO_EOL();
 878
 879                         /* copy new line into place and display */
 880                         strcpy(buf, hline);
 881                         eol_num = strlen(buf);
 882                         REFRESH_TO_EOL();
 883                         continue;
 884                 }
 885 #ifdef CONFIG_AUTO_COMPLETE
 886                 case '\t': {
 887                         int num2, col;
 888
 889                         /* do not autocomplete when in the middle */
 890                         if (num < eol_num) {
 891                                 getcmd_cbeep();
 892                                 break;
 893                         }
 894
 895                         buf[num] = '\0';
 896                         col = strlen(prompt) + eol_num;
 897                         num2 = num;
 898                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 899                                 col = num2 - num;
 900                                 num += col;
 901                                 eol_num += col;
 902                         }
 903                         break;
 904                 }
 905 #endif
 906                 default:
 907                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 908                         break;
 909                 }
 910         }
 911         *len = eol_num;
 912         buf[eol_num] = '\0';    /* lose the newline */
 913
 914         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 915                 cread_add_to_hist(buf);
 916         hist_cur = hist_add_idx;
 917
 918         return 0;
 919 }
 920
 921 #endif /* CONFIG_CMDLINE_EDITING */
 922
 923 /****************************************************************************/
 924
 925 /*
 926  * Prompt for input and read a line.
 927  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 928  * time out when time goes past endtime (timebase time in ticks).
 929  * Return:      number of read characters
 930  *              -1 if break
 931  *              -2 if timed out
 932  */
 933 int readline (const char *const prompt)
 934 {
 935         /*
 936          * If console_buffer isn't 0-length the user will be prompted to modify
 937          * it instead of entering it from scratch as desired.
 938          */
 939         console_buffer[0] = '\0';
 940
 941         return readline_into_buffer(prompt, console_buffer, 0);
 942 }
 943
 944
 945 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
 946 {
 947         char *p = buffer;
 948 #ifdef CONFIG_CMDLINE_EDITING
 949         unsigned int len = CONFIG_SYS_CBSIZE;
 950         int rc;
 951         static int initted = 0;
 952
 953         /*
 954          * History uses a global array which is not
 955          * writable until after relocation to RAM.
 956          * Revert to non-history version if still
 957          * running from flash.
 958          */
 959         if (gd->flags & GD_FLG_RELOC) {
 960                 if (!initted) {
 961                         hist_init();
 962                         initted = 1;
 963                 }
 964
 965                 if (prompt)
 966                         puts (prompt);
 967
 968                 rc = cread_line(prompt, p, &len, timeout);
 969                 return rc < 0 ? rc : len;
 970
 971         } else {
 972 #endif  /* CONFIG_CMDLINE_EDITING */
 973         char * p_buf = p;
 974         int     n = 0;                          /* buffer index         */
 975         int     plen = 0;                       /* prompt length        */
 976         int     col;                            /* output column cnt    */
 977         char    c;
 978
 979         /* print prompt */
 980         if (prompt) {
 981                 plen = strlen (prompt);
 982                 puts (prompt);
 983         }
 984         col = plen;
 985
 986         for (;;) {
 987 #ifdef CONFIG_BOOT_RETRY_TIME
 988                 while (!tstc()) {       /* while no incoming data */
 989                         if (retry_time >= 0 && get_ticks() > endtime)
 990                                 return (-2);    /* timed out */
 991                         WATCHDOG_RESET();
 992                 }
 993 #endif
 994                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 995
 996 #ifdef CONFIG_SHOW_ACTIVITY
 997                 while (!tstc()) {
 998                         extern void show_activity(int arg);
 999                         show_activity(0);
1000                         WATCHDOG_RESET();
1001                 }
1002 #endif
1003                 c = getc();
1004
1005                 /*
1006                  * Special character handling
1007                  */
1008                 switch (c) {
1009                 case '\r':                              /* Enter                */
1010                 case '\n':
1011                         *p = '\0';
1012                         puts ("\r\n");
1013                         return (p - p_buf);
1014
1015                 case '\0':                              /* nul                  */
1016                         continue;
1017
1018                 case 0x03:                              /* ^C - break           */
1019                         p_buf[0] = '\0';        /* discard input */
1020                         return (-1);
1021
1022                 case 0x15:                              /* ^U - erase line      */
1023                         while (col > plen) {
1024                                 puts (erase_seq);
1025                                 --col;
1026                         }
1027                         p = p_buf;
1028                         n = 0;
1029                         continue;
1030
1031                 case 0x17:                              /* ^W - erase word      */
1032                         p=delete_char(p_buf, p, &col, &n, plen);
1033                         while ((n > 0) && (*p != ' ')) {
1034                                 p=delete_char(p_buf, p, &col, &n, plen);
1035                         }
1036                         continue;
1037
1038                 case 0x08:                              /* ^H  - backspace      */
1039                 case 0x7F:                              /* DEL - backspace      */
1040                         p=delete_char(p_buf, p, &col, &n, plen);
1041                         continue;
1042
1043                 default:
1044                         /*
1045                          * Must be a normal character then
1046                          */
1047                         if (n < CONFIG_SYS_CBSIZE-2) {
1048                                 if (c == '\t') {        /* expand TABs          */
1049 #ifdef CONFIG_AUTO_COMPLETE
1050                                         /* if auto completion triggered just continue */
1051                                         *p = '\0';
1052                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1053                                                 p = p_buf + n;  /* reset */
1054                                                 continue;
1055                                         }
1056 #endif
1057                                         puts (tab_seq+(col&07));
1058                                         col += 8 - (col&07);
1059                                 } else {
1060                                         ++col;          /* echo input           */
1061                                         putc (c);
1062                                 }
1063                                 *p++ = c;
1064                                 ++n;
1065                         } else {                        /* Buffer full          */
1066                                 putc ('\a');
1067                         }
1068                 }
1069         }
1070 #ifdef CONFIG_CMDLINE_EDITING
1071         }
1072 #endif
1073 }
1074
1075 /****************************************************************************/
1076
1077 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1078 {
1079         char *s;
1080
1081         if (*np == 0) {
1082                 return (p);
1083         }
1084
1085         if (*(--p) == '\t') {                   /* will retype the whole line   */
1086                 while (*colp > plen) {
1087                         puts (erase_seq);
1088                         (*colp)--;
1089                 }
1090                 for (s=buffer; s<p; ++s) {
1091                         if (*s == '\t') {
1092                                 puts (tab_seq+((*colp) & 07));
1093                                 *colp += 8 - ((*colp) & 07);
1094                         } else {
1095                                 ++(*colp);
1096                                 putc (*s);
1097                         }
1098                 }
1099         } else {
1100                 puts (erase_seq);
1101                 (*colp)--;
1102         }
1103         (*np)--;
1104         return (p);
1105 }
1106
1107 /****************************************************************************/
1108
1109 int parse_line (char *line, char *argv[])
1110 {
1111         int nargs = 0;
1112
1113 #ifdef DEBUG_PARSER
1114         printf ("parse_line: \"%s\"\n", line);
1115 #endif
1116         while (nargs < CONFIG_SYS_MAXARGS) {
1117
1118                 /* skip any white space */
1119                 while (isblank(*line))
1120                         ++line;
1121
1122                 if (*line == '\0') {    /* end of line, no more args    */
1123                         argv[nargs] = NULL;
1124 #ifdef DEBUG_PARSER
1125                 printf ("parse_line: nargs=%d\n", nargs);
1126 #endif
1127                         return (nargs);
1128                 }
1129
1130                 argv[nargs++] = line;   /* begin of argument string     */
1131
1132                 /* find end of string */
1133                 while (*line && !isblank(*line))
1134                         ++line;
1135
1136                 if (*line == '\0') {    /* end of line, no more args    */
1137                         argv[nargs] = NULL;
1138 #ifdef DEBUG_PARSER
1139                 printf ("parse_line: nargs=%d\n", nargs);
1140 #endif
1141                         return (nargs);
1142                 }
1143
1144                 *line++ = '\0';         /* terminate current arg         */
1145         }
1146
1147         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1148
1149 #ifdef DEBUG_PARSER
1150         printf ("parse_line: nargs=%d\n", nargs);
1151 #endif
1152         return (nargs);
1153 }
1154
1155 /****************************************************************************/
1156
1157 static void process_macros (const char *input, char *output)
1158 {
1159         char c, prev;
1160         const char *varname_start = NULL;
1161         int inputcnt = strlen (input);
1162         int outputcnt = CONFIG_SYS_CBSIZE;
1163         int state = 0;          /* 0 = waiting for '$'  */
1164
1165         /* 1 = waiting for '(' or '{' */
1166         /* 2 = waiting for ')' or '}' */
1167         /* 3 = waiting for '''  */
1168 #ifdef DEBUG_PARSER
1169         char *output_start = output;
1170
1171         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1172                 input);
1173 #endif
1174
1175         prev = '\0';            /* previous character   */
1176
1177         while (inputcnt && outputcnt) {
1178                 c = *input++;
1179                 inputcnt--;
1180
1181                 if (state != 3) {
1182                         /* remove one level of escape characters */
1183                         if ((c == '\\') && (prev != '\\')) {
1184                                 if (inputcnt-- == 0)
1185                                         break;
1186                                 prev = c;
1187                                 c = *input++;
1188                         }
1189                 }
1190
1191                 switch (state) {
1192                 case 0: /* Waiting for (unescaped) $    */
1193                         if ((c == '\'') && (prev != '\\')) {
1194                                 state = 3;
1195                                 break;
1196                         }
1197                         if ((c == '$') && (prev != '\\')) {
1198                                 state++;
1199                         } else {
1200                                 *(output++) = c;
1201                                 outputcnt--;
1202                         }
1203                         break;
1204                 case 1: /* Waiting for (        */
1205                         if (c == '(' || c == '{') {
1206                                 state++;
1207                                 varname_start = input;
1208                         } else {
1209                                 state = 0;
1210                                 *(output++) = '$';
1211                                 outputcnt--;
1212
1213                                 if (outputcnt) {
1214                                         *(output++) = c;
1215                                         outputcnt--;
1216                                 }
1217                         }
1218                         break;
1219                 case 2: /* Waiting for )        */
1220                         if (c == ')' || c == '}') {
1221                                 int i;
1222                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1223                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1224
1225                                 /* Get the varname */
1226                                 for (i = 0; i < envcnt; i++) {
1227                                         envname[i] = varname_start[i];
1228                                 }
1229                                 envname[i] = 0;
1230
1231                                 /* Get its value */
1232                                 envval = getenv (envname);
1233
1234                                 /* Copy into the line if it exists */
1235                                 if (envval != NULL)
1236                                         while ((*envval) && outputcnt) {
1237                                                 *(output++) = *(envval++);
1238                                                 outputcnt--;
1239                                         }
1240                                 /* Look for another '$' */
1241                                 state = 0;
1242                         }
1243                         break;
1244                 case 3: /* Waiting for '        */
1245                         if ((c == '\'') && (prev != '\\')) {
1246                                 state = 0;
1247                         } else {
1248                                 *(output++) = c;
1249                                 outputcnt--;
1250                         }
1251                         break;
1252                 }
1253                 prev = c;
1254         }
1255
1256         if (outputcnt)
1257                 *output = 0;
1258         else
1259                 *(output - 1) = 0;
1260
1261 #ifdef DEBUG_PARSER
1262         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1263                 strlen (output_start), output_start);
1264 #endif
1265 }
1266
1267 /****************************************************************************
1268  * returns:
1269  *      1  - command executed, repeatable
1270  *      0  - command executed but not repeatable, interrupted commands are
1271  *           always considered not repeatable
1272  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1273  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1274  *           considered unrecognized)
1275  *
1276  * WARNING:
1277  *
1278  * We must create a temporary copy of the command since the command we get
1279  * may be the result from getenv(), which returns a pointer directly to
1280  * the environment data, which may change magicly when the command we run
1281  * creates or modifies environment variables (like "bootp" does).
1282  */
1283
1284 int run_command (const char *cmd, int flag)
1285 {
1286         cmd_tbl_t *cmdtp;
1287         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1288         char *token;                    /* start of token in cmdbuf     */
1289         char *sep;                      /* end of token (separator) in cmdbuf */
1290         char finaltoken[CONFIG_SYS_CBSIZE];
1291         char *str = cmdbuf;
1292         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1293         int argc, inquotes;
1294         int repeatable = 1;
1295         int rc = 0;
1296
1297 #ifdef DEBUG_PARSER
1298         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1299         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1300         puts ("\"\n");
1301 #endif
1302
1303         clear_ctrlc();          /* forget any previous Control C */
1304
1305         if (!cmd || !*cmd) {
1306                 return -1;      /* empty command */
1307         }
1308
1309         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1310                 puts ("## Command too long!\n");
1311                 return -1;
1312         }
1313
1314         strcpy (cmdbuf, cmd);
1315
1316         /* Process separators and check for invalid
1317          * repeatable commands
1318          */
1319
1320 #ifdef DEBUG_PARSER
1321         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1322 #endif
1323         while (*str) {
1324
1325                 /*
1326                  * Find separator, or string end
1327                  * Allow simple escape of ';' by writing "\;"
1328                  */
1329                 for (inquotes = 0, sep = str; *sep; sep++) {
1330                         if ((*sep=='\'') &&
1331                             (*(sep-1) != '\\'))
1332                                 inquotes=!inquotes;
1333
1334                         if (!inquotes &&
1335                             (*sep == ';') &&    /* separator            */
1336                             ( sep != str) &&    /* past string start    */
1337                             (*(sep-1) != '\\')) /* and NOT escaped      */
1338                                 break;
1339                 }
1340
1341                 /*
1342                  * Limit the token to data between separators
1343                  */
1344                 token = str;
1345                 if (*sep) {
1346                         str = sep + 1;  /* start of command for next pass */
1347                         *sep = '\0';
1348                 }
1349                 else
1350                         str = sep;      /* no more commands for next pass */
1351 #ifdef DEBUG_PARSER
1352                 printf ("token: \"%s\"\n", token);
1353 #endif
1354
1355                 /* find macros in this token and replace them */
1356                 process_macros (token, finaltoken);
1357
1358                 /* Extract arguments */
1359                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1360                         rc = -1;        /* no command at all */
1361                         continue;
1362                 }
1363
1364                 /* Look up command in command table */
1365                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1366                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1367                         rc = -1;        /* give up after bad command */
1368                         continue;
1369                 }
1370
1371                 /* found - check max args */
1372                 if (argc > cmdtp->maxargs) {
1373                         cmd_usage(cmdtp);
1374                         rc = -1;
1375                         continue;
1376                 }
1377
1378 #if defined(CONFIG_CMD_BOOTD)
1379                 /* avoid "bootd" recursion */
1380                 if (cmdtp->cmd == do_bootd) {
1381 #ifdef DEBUG_PARSER
1382                         printf ("[%s]\n", finaltoken);
1383 #endif
1384                         if (flag & CMD_FLAG_BOOTD) {
1385                                 puts ("'bootd' recursion detected\n");
1386                                 rc = -1;
1387                                 continue;
1388                         } else {
1389                                 flag |= CMD_FLAG_BOOTD;
1390                         }
1391                 }
1392 #endif
1393
1394                 /* OK - call function to do the command */
1395                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1396                         rc = -1;
1397                 }
1398
1399                 repeatable &= cmdtp->repeatable;
1400
1401                 /* Did the user stop this? */
1402                 if (had_ctrlc ())
1403                         return -1;      /* if stopped then not repeatable */
1404         }
1405
1406         return rc ? rc : repeatable;
1407 }
1408
1409 /****************************************************************************/
1410
1411 #if defined(CONFIG_CMD_RUN)
1412 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1413 {
1414         int i;
1415
1416         if (argc < 2)
1417                 return cmd_usage(cmdtp);
1418
1419         for (i=1; i<argc; ++i) {
1420                 char *arg;
1421
1422                 if ((arg = getenv (argv[i])) == NULL) {
1423                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1424                         return 1;
1425                 }
1426
1427                 if (run_command2(arg, flag) != 0)
1428                         return 1;
1429         }
1430         return 0;
1431 }
1432 #endif