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 int run_command2(const char *cmd, int flag)
 274 {
 275 #ifndef CONFIG_SYS_HUSH_PARSER
 276         /*
 277          * run_command can return 0 or 1 for success, so clean up its result.
 278          */
 279         if (run_command(cmd, flag) == -1)
 280                 return 1;
 281
 282         return 0;
 283 #else
 284         return parse_string_outer(cmd,
 285                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
 286 #endif
 287 }
 288
 289 /****************************************************************************/
 290
 291 void main_loop (void)
 292 {
 293 #ifndef CONFIG_SYS_HUSH_PARSER
 294         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
 295         int len;
 296         int rc = 1;
 297         int flag;
 298 #endif
 299
 300 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 301         char *s;
 302         int bootdelay;
 303 #endif
 304 #ifdef CONFIG_PREBOOT
 305         char *p;
 306 #endif
 307 #ifdef CONFIG_BOOTCOUNT_LIMIT
 308         unsigned long bootcount = 0;
 309         unsigned long bootlimit = 0;
 310         char *bcs;
 311         char bcs_set[16];
 312 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 313
 314 #ifdef CONFIG_BOOTCOUNT_LIMIT
 315         bootcount = bootcount_load();
 316         bootcount++;
 317         bootcount_store (bootcount);
 318         sprintf (bcs_set, "%lu", bootcount);
 319         setenv ("bootcount", bcs_set);
 320         bcs = getenv ("bootlimit");
 321         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 322 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 323
 324 #ifdef CONFIG_MODEM_SUPPORT
 325         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 326         if (do_mdm_init) {
 327                 char *str = strdup(getenv("mdm_cmd"));
 328                 setenv ("preboot", str);  /* set or delete definition */
 329                 if (str != NULL)
 330                         free (str);
 331                 mdm_init(); /* wait for modem connection */
 332         }
 333 #endif  /* CONFIG_MODEM_SUPPORT */
 334
 335 #ifdef CONFIG_VERSION_VARIABLE
 336         {
 337                 setenv ("ver", version_string);  /* set version variable */
 338         }
 339 #endif /* CONFIG_VERSION_VARIABLE */
 340
 341 #ifdef CONFIG_SYS_HUSH_PARSER
 342         u_boot_hush_start ();
 343 #endif
 344
 345 #if defined(CONFIG_HUSH_INIT_VAR)
 346         hush_init_var ();
 347 #endif
 348
 349 #ifdef CONFIG_PREBOOT
 350         if ((p = getenv ("preboot")) != NULL) {
 351 # ifdef CONFIG_AUTOBOOT_KEYED
 352                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 353 # endif
 354
 355                 run_command2(p, 0);
 356
 357 # ifdef CONFIG_AUTOBOOT_KEYED
 358                 disable_ctrlc(prev);    /* restore Control C checking */
 359 # endif
 360         }
 361 #endif /* CONFIG_PREBOOT */
 362
 363 #if defined(CONFIG_UPDATE_TFTP)
 364         update_tftp (0UL);
 365 #endif /* CONFIG_UPDATE_TFTP */
 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 #if defined(CONFIG_MENU_SHOW)
 374         bootdelay = menu_show(bootdelay);
 375 #endif
 376 # ifdef CONFIG_BOOT_RETRY_TIME
 377         init_cmd_timeout ();
 378 # endif /* CONFIG_BOOT_RETRY_TIME */
 379
 380 #ifdef CONFIG_POST
 381         if (gd->flags & GD_FLG_POSTFAIL) {
 382                 s = getenv("failbootcmd");
 383         }
 384         else
 385 #endif /* CONFIG_POST */
 386 #ifdef CONFIG_BOOTCOUNT_LIMIT
 387         if (bootlimit && (bootcount > bootlimit)) {
 388                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 389                         (unsigned)bootlimit);
 390                 s = getenv ("altbootcmd");
 391         }
 392         else
 393 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 394                 s = getenv ("bootcmd");
 395
 396         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 397
 398         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 399 # ifdef CONFIG_AUTOBOOT_KEYED
 400                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 401 # endif
 402
 403                 run_command2(s, 0);
 404
 405 # ifdef CONFIG_AUTOBOOT_KEYED
 406                 disable_ctrlc(prev);    /* restore Control C checking */
 407 # endif
 408         }
 409
 410 # ifdef CONFIG_MENUKEY
 411         if (menukey == CONFIG_MENUKEY) {
 412                 s = getenv("menucmd");
 413                 if (s)
 414                         run_command2(s, 0);
 415         }
 416 #endif /* CONFIG_MENUKEY */
 417 #endif /* CONFIG_BOOTDELAY */
 418
 419         /*
 420          * Main Loop for Monitor Command Processing
 421          */
 422 #ifdef CONFIG_SYS_HUSH_PARSER
 423         parse_file_outer();
 424         /* This point is never reached */
 425         for (;;);
 426 #else
 427         for (;;) {
 428 #ifdef CONFIG_BOOT_RETRY_TIME
 429                 if (rc >= 0) {
 430                         /* Saw enough of a valid command to
 431                          * restart the timeout.
 432                          */
 433                         reset_cmd_timeout();
 434                 }
 435 #endif
 436                 len = readline (CONFIG_SYS_PROMPT);
 437
 438                 flag = 0;       /* assume no special flags for now */
 439                 if (len > 0)
 440                         strcpy (lastcommand, console_buffer);
 441                 else if (len == 0)
 442                         flag |= CMD_FLAG_REPEAT;
 443 #ifdef CONFIG_BOOT_RETRY_TIME
 444                 else if (len == -2) {
 445                         /* -2 means timed out, retry autoboot
 446                          */
 447                         puts ("\nTimed out waiting for command\n");
 448 # ifdef CONFIG_RESET_TO_RETRY
 449                         /* Reinit board to run initialization code again */
 450                         do_reset (NULL, 0, 0, NULL);
 451 # else
 452                         return;         /* retry autoboot */
 453 # endif
 454                 }
 455 #endif
 456
 457                 if (len == -1)
 458                         puts ("<INTERRUPT>\n");
 459                 else
 460                         rc = run_command (lastcommand, flag);
 461
 462                 if (rc <= 0) {
 463                         /* invalid command or not repeatable, forget it */
 464                         lastcommand[0] = 0;
 465                 }
 466         }
 467 #endif /*CONFIG_SYS_HUSH_PARSER*/
 468 }
 469
 470 #ifdef CONFIG_BOOT_RETRY_TIME
 471 /***************************************************************************
 472  * initialize command line timeout
 473  */
 474 void init_cmd_timeout(void)
 475 {
 476         char *s = getenv ("bootretry");
 477
 478         if (s != NULL)
 479                 retry_time = (int)simple_strtol(s, NULL, 10);
 480         else
 481                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 482
 483         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 484                 retry_time = CONFIG_BOOT_RETRY_MIN;
 485 }
 486
 487 /***************************************************************************
 488  * reset command line timeout to retry_time seconds
 489  */
 490 void reset_cmd_timeout(void)
 491 {
 492         endtime = endtick(retry_time);
 493 }
 494 #endif
 495
 496 #ifdef CONFIG_CMDLINE_EDITING
 497
 498 /*
 499  * cmdline-editing related codes from vivi.
 500  * Author: Janghoon Lyu <nandy@mizi.com>
 501  */
 502
 503 #define putnstr(str,n)  do {                    \
 504                 printf ("%.*s", (int)n, str);   \
 505         } while (0)
 506
 507 #define CTL_CH(c)               ((c) - 'a' + 1)
 508 #define CTL_BACKSPACE           ('\b')
 509 #define DEL                     ((char)255)
 510 #define DEL7                    ((char)127)
 511 #define CREAD_HIST_CHAR         ('!')
 512
 513 #define getcmd_putch(ch)        putc(ch)
 514 #define getcmd_getch()          getc()
 515 #define getcmd_cbeep()          getcmd_putch('\a')
 516
 517 #define HIST_MAX                20
 518 #define HIST_SIZE               CONFIG_SYS_CBSIZE
 519
 520 static int hist_max = 0;
 521 static int hist_add_idx = 0;
 522 static int hist_cur = -1;
 523 unsigned hist_num = 0;
 524
 525 char* hist_list[HIST_MAX];
 526 char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
 527
 528 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 529
 530 static void hist_init(void)
 531 {
 532         int i;
 533
 534         hist_max = 0;
 535         hist_add_idx = 0;
 536         hist_cur = -1;
 537         hist_num = 0;
 538
 539         for (i = 0; i < HIST_MAX; i++) {
 540                 hist_list[i] = hist_lines[i];
 541                 hist_list[i][0] = '\0';
 542         }
 543 }
 544
 545 static void cread_add_to_hist(char *line)
 546 {
 547         strcpy(hist_list[hist_add_idx], line);
 548
 549         if (++hist_add_idx >= HIST_MAX)
 550                 hist_add_idx = 0;
 551
 552         if (hist_add_idx > hist_max)
 553                 hist_max = hist_add_idx;
 554
 555         hist_num++;
 556 }
 557
 558 static char* hist_prev(void)
 559 {
 560         char *ret;
 561         int old_cur;
 562
 563         if (hist_cur < 0)
 564                 return NULL;
 565
 566         old_cur = hist_cur;
 567         if (--hist_cur < 0)
 568                 hist_cur = hist_max;
 569
 570         if (hist_cur == hist_add_idx) {
 571                 hist_cur = old_cur;
 572                 ret = NULL;
 573         } else
 574                 ret = hist_list[hist_cur];
 575
 576         return (ret);
 577 }
 578
 579 static char* hist_next(void)
 580 {
 581         char *ret;
 582
 583         if (hist_cur < 0)
 584                 return NULL;
 585
 586         if (hist_cur == hist_add_idx)
 587                 return NULL;
 588
 589         if (++hist_cur > hist_max)
 590                 hist_cur = 0;
 591
 592         if (hist_cur == hist_add_idx) {
 593                 ret = "";
 594         } else
 595                 ret = hist_list[hist_cur];
 596
 597         return (ret);
 598 }
 599
 600 #ifndef CONFIG_CMDLINE_EDITING
 601 static void cread_print_hist_list(void)
 602 {
 603         int i;
 604         unsigned long n;
 605
 606         n = hist_num - hist_max;
 607
 608         i = hist_add_idx + 1;
 609         while (1) {
 610                 if (i > hist_max)
 611                         i = 0;
 612                 if (i == hist_add_idx)
 613                         break;
 614                 printf("%s\n", hist_list[i]);
 615                 n++;
 616                 i++;
 617         }
 618 }
 619 #endif /* CONFIG_CMDLINE_EDITING */
 620
 621 #define BEGINNING_OF_LINE() {                   \
 622         while (num) {                           \
 623                 getcmd_putch(CTL_BACKSPACE);    \
 624                 num--;                          \
 625         }                                       \
 626 }
 627
 628 #define ERASE_TO_EOL() {                                \
 629         if (num < eol_num) {                            \
 630                 printf("%*s", (int)(eol_num - num), ""); \
 631                 do {                                    \
 632                         getcmd_putch(CTL_BACKSPACE);    \
 633                 } while (--eol_num > num);              \
 634         }                                               \
 635 }
 636
 637 #define REFRESH_TO_EOL() {                      \
 638         if (num < eol_num) {                    \
 639                 wlen = eol_num - num;           \
 640                 putnstr(buf + num, wlen);       \
 641                 num = eol_num;                  \
 642         }                                       \
 643 }
 644
 645 static void cread_add_char(char ichar, int insert, unsigned long *num,
 646                unsigned long *eol_num, char *buf, unsigned long len)
 647 {
 648         unsigned long wlen;
 649
 650         /* room ??? */
 651         if (insert || *num == *eol_num) {
 652                 if (*eol_num > len - 1) {
 653                         getcmd_cbeep();
 654                         return;
 655                 }
 656                 (*eol_num)++;
 657         }
 658
 659         if (insert) {
 660                 wlen = *eol_num - *num;
 661                 if (wlen > 1) {
 662                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 663                 }
 664
 665                 buf[*num] = ichar;
 666                 putnstr(buf + *num, wlen);
 667                 (*num)++;
 668                 while (--wlen) {
 669                         getcmd_putch(CTL_BACKSPACE);
 670                 }
 671         } else {
 672                 /* echo the character */
 673                 wlen = 1;
 674                 buf[*num] = ichar;
 675                 putnstr(buf + *num, wlen);
 676                 (*num)++;
 677         }
 678 }
 679
 680 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 681               unsigned long *eol_num, char *buf, unsigned long len)
 682 {
 683         while (strsize--) {
 684                 cread_add_char(*str, insert, num, eol_num, buf, len);
 685                 str++;
 686         }
 687 }
 688
 689 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
 690                 int timeout)
 691 {
 692         unsigned long num = 0;
 693         unsigned long eol_num = 0;
 694         unsigned long wlen;
 695         char ichar;
 696         int insert = 1;
 697         int esc_len = 0;
 698         char esc_save[8];
 699         int init_len = strlen(buf);
 700         int first = 1;
 701
 702         if (init_len)
 703                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
 704
 705         while (1) {
 706 #ifdef CONFIG_BOOT_RETRY_TIME
 707                 while (!tstc()) {       /* while no incoming data */
 708                         if (retry_time >= 0 && get_ticks() > endtime)
 709                                 return (-2);    /* timed out */
 710                         WATCHDOG_RESET();
 711                 }
 712 #endif
 713                 if (first && timeout) {
 714                         uint64_t etime = endtick(timeout);
 715
 716                         while (!tstc()) {       /* while no incoming data */
 717                                 if (get_ticks() >= etime)
 718                                         return -2;      /* timed out */
 719                                 WATCHDOG_RESET();
 720                         }
 721                         first = 0;
 722                 }
 723
 724                 ichar = getcmd_getch();
 725
 726                 if ((ichar == '\n') || (ichar == '\r')) {
 727                         putc('\n');
 728                         break;
 729                 }
 730
 731                 /*
 732                  * handle standard linux xterm esc sequences for arrow key, etc.
 733                  */
 734                 if (esc_len != 0) {
 735                         if (esc_len == 1) {
 736                                 if (ichar == '[') {
 737                                         esc_save[esc_len] = ichar;
 738                                         esc_len = 2;
 739                                 } else {
 740                                         cread_add_str(esc_save, esc_len, insert,
 741                                                       &num, &eol_num, buf, *len);
 742                                         esc_len = 0;
 743                                 }
 744                                 continue;
 745                         }
 746
 747                         switch (ichar) {
 748
 749                         case 'D':       /* <- key */
 750                                 ichar = CTL_CH('b');
 751                                 esc_len = 0;
 752                                 break;
 753                         case 'C':       /* -> key */
 754                                 ichar = CTL_CH('f');
 755                                 esc_len = 0;
 756                                 break;  /* pass off to ^F handler */
 757                         case 'H':       /* Home key */
 758                                 ichar = CTL_CH('a');
 759                                 esc_len = 0;
 760                                 break;  /* pass off to ^A handler */
 761                         case 'A':       /* up arrow */
 762                                 ichar = CTL_CH('p');
 763                                 esc_len = 0;
 764                                 break;  /* pass off to ^P handler */
 765                         case 'B':       /* down arrow */
 766                                 ichar = CTL_CH('n');
 767                                 esc_len = 0;
 768                                 break;  /* pass off to ^N handler */
 769                         default:
 770                                 esc_save[esc_len++] = ichar;
 771                                 cread_add_str(esc_save, esc_len, insert,
 772                                               &num, &eol_num, buf, *len);
 773                                 esc_len = 0;
 774                                 continue;
 775                         }
 776                 }
 777
 778                 switch (ichar) {
 779                 case 0x1b:
 780                         if (esc_len == 0) {
 781                                 esc_save[esc_len] = ichar;
 782                                 esc_len = 1;
 783                         } else {
 784                                 puts("impossible condition #876\n");
 785                                 esc_len = 0;
 786                         }
 787                         break;
 788
 789                 case CTL_CH('a'):
 790                         BEGINNING_OF_LINE();
 791                         break;
 792                 case CTL_CH('c'):       /* ^C - break */
 793                         *buf = '\0';    /* discard input */
 794                         return (-1);
 795                 case CTL_CH('f'):
 796                         if (num < eol_num) {
 797                                 getcmd_putch(buf[num]);
 798                                 num++;
 799                         }
 800                         break;
 801                 case CTL_CH('b'):
 802                         if (num) {
 803                                 getcmd_putch(CTL_BACKSPACE);
 804                                 num--;
 805                         }
 806                         break;
 807                 case CTL_CH('d'):
 808                         if (num < eol_num) {
 809                                 wlen = eol_num - num - 1;
 810                                 if (wlen) {
 811                                         memmove(&buf[num], &buf[num+1], wlen);
 812                                         putnstr(buf + num, wlen);
 813                                 }
 814
 815                                 getcmd_putch(' ');
 816                                 do {
 817                                         getcmd_putch(CTL_BACKSPACE);
 818                                 } while (wlen--);
 819                                 eol_num--;
 820                         }
 821                         break;
 822                 case CTL_CH('k'):
 823                         ERASE_TO_EOL();
 824                         break;
 825                 case CTL_CH('e'):
 826                         REFRESH_TO_EOL();
 827                         break;
 828                 case CTL_CH('o'):
 829                         insert = !insert;
 830                         break;
 831                 case CTL_CH('x'):
 832                 case CTL_CH('u'):
 833                         BEGINNING_OF_LINE();
 834                         ERASE_TO_EOL();
 835                         break;
 836                 case DEL:
 837                 case DEL7:
 838                 case 8:
 839                         if (num) {
 840                                 wlen = eol_num - num;
 841                                 num--;
 842                                 memmove(&buf[num], &buf[num+1], wlen);
 843                                 getcmd_putch(CTL_BACKSPACE);
 844                                 putnstr(buf + num, wlen);
 845                                 getcmd_putch(' ');
 846                                 do {
 847                                         getcmd_putch(CTL_BACKSPACE);
 848                                 } while (wlen--);
 849                                 eol_num--;
 850                         }
 851                         break;
 852                 case CTL_CH('p'):
 853                 case CTL_CH('n'):
 854                 {
 855                         char * hline;
 856
 857                         esc_len = 0;
 858
 859                         if (ichar == CTL_CH('p'))
 860                                 hline = hist_prev();
 861                         else
 862                                 hline = hist_next();
 863
 864                         if (!hline) {
 865                                 getcmd_cbeep();
 866                                 continue;
 867                         }
 868
 869                         /* nuke the current line */
 870                         /* first, go home */
 871                         BEGINNING_OF_LINE();
 872
 873                         /* erase to end of line */
 874                         ERASE_TO_EOL();
 875
 876                         /* copy new line into place and display */
 877                         strcpy(buf, hline);
 878                         eol_num = strlen(buf);
 879                         REFRESH_TO_EOL();
 880                         continue;
 881                 }
 882 #ifdef CONFIG_AUTO_COMPLETE
 883                 case '\t': {
 884                         int num2, col;
 885
 886                         /* do not autocomplete when in the middle */
 887                         if (num < eol_num) {
 888                                 getcmd_cbeep();
 889                                 break;
 890                         }
 891
 892                         buf[num] = '\0';
 893                         col = strlen(prompt) + eol_num;
 894                         num2 = num;
 895                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 896                                 col = num2 - num;
 897                                 num += col;
 898                                 eol_num += col;
 899                         }
 900                         break;
 901                 }
 902 #endif
 903                 default:
 904                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 905                         break;
 906                 }
 907         }
 908         *len = eol_num;
 909         buf[eol_num] = '\0';    /* lose the newline */
 910
 911         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 912                 cread_add_to_hist(buf);
 913         hist_cur = hist_add_idx;
 914
 915         return 0;
 916 }
 917
 918 #endif /* CONFIG_CMDLINE_EDITING */
 919
 920 /****************************************************************************/
 921
 922 /*
 923  * Prompt for input and read a line.
 924  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 925  * time out when time goes past endtime (timebase time in ticks).
 926  * Return:      number of read characters
 927  *              -1 if break
 928  *              -2 if timed out
 929  */
 930 int readline (const char *const prompt)
 931 {
 932         /*
 933          * If console_buffer isn't 0-length the user will be prompted to modify
 934          * it instead of entering it from scratch as desired.
 935          */
 936         console_buffer[0] = '\0';
 937
 938         return readline_into_buffer(prompt, console_buffer, 0);
 939 }
 940
 941
 942 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
 943 {
 944         char *p = buffer;
 945 #ifdef CONFIG_CMDLINE_EDITING
 946         unsigned int len = CONFIG_SYS_CBSIZE;
 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                 if (prompt)
 963                         puts (prompt);
 964
 965                 rc = cread_line(prompt, p, &len, timeout);
 966                 return rc < 0 ? rc : len;
 967
 968         } else {
 969 #endif  /* CONFIG_CMDLINE_EDITING */
 970         char * p_buf = p;
 971         int     n = 0;                          /* buffer index         */
 972         int     plen = 0;                       /* prompt length        */
 973         int     col;                            /* output column cnt    */
 974         char    c;
 975
 976         /* print prompt */
 977         if (prompt) {
 978                 plen = strlen (prompt);
 979                 puts (prompt);
 980         }
 981         col = plen;
 982
 983         for (;;) {
 984 #ifdef CONFIG_BOOT_RETRY_TIME
 985                 while (!tstc()) {       /* while no incoming data */
 986                         if (retry_time >= 0 && get_ticks() > endtime)
 987                                 return (-2);    /* timed out */
 988                         WATCHDOG_RESET();
 989                 }
 990 #endif
 991                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 992
 993 #ifdef CONFIG_SHOW_ACTIVITY
 994                 while (!tstc()) {
 995                         extern void show_activity(int arg);
 996                         show_activity(0);
 997                         WATCHDOG_RESET();
 998                 }
 999 #endif
1000                 c = getc();
1001
1002                 /*
1003                  * Special character handling
1004                  */
1005                 switch (c) {
1006                 case '\r':                              /* Enter                */
1007                 case '\n':
1008                         *p = '\0';
1009                         puts ("\r\n");
1010                         return (p - p_buf);
1011
1012                 case '\0':                              /* nul                  */
1013                         continue;
1014
1015                 case 0x03:                              /* ^C - break           */
1016                         p_buf[0] = '\0';        /* discard input */
1017                         return (-1);
1018
1019                 case 0x15:                              /* ^U - erase line      */
1020                         while (col > plen) {
1021                                 puts (erase_seq);
1022                                 --col;
1023                         }
1024                         p = p_buf;
1025                         n = 0;
1026                         continue;
1027
1028                 case 0x17:                              /* ^W - erase word      */
1029                         p=delete_char(p_buf, p, &col, &n, plen);
1030                         while ((n > 0) && (*p != ' ')) {
1031                                 p=delete_char(p_buf, p, &col, &n, plen);
1032                         }
1033                         continue;
1034
1035                 case 0x08:                              /* ^H  - backspace      */
1036                 case 0x7F:                              /* DEL - backspace      */
1037                         p=delete_char(p_buf, p, &col, &n, plen);
1038                         continue;
1039
1040                 default:
1041                         /*
1042                          * Must be a normal character then
1043                          */
1044                         if (n < CONFIG_SYS_CBSIZE-2) {
1045                                 if (c == '\t') {        /* expand TABs          */
1046 #ifdef CONFIG_AUTO_COMPLETE
1047                                         /* if auto completion triggered just continue */
1048                                         *p = '\0';
1049                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1050                                                 p = p_buf + n;  /* reset */
1051                                                 continue;
1052                                         }
1053 #endif
1054                                         puts (tab_seq+(col&07));
1055                                         col += 8 - (col&07);
1056                                 } else {
1057                                         ++col;          /* echo input           */
1058                                         putc (c);
1059                                 }
1060                                 *p++ = c;
1061                                 ++n;
1062                         } else {                        /* Buffer full          */
1063                                 putc ('\a');
1064                         }
1065                 }
1066         }
1067 #ifdef CONFIG_CMDLINE_EDITING
1068         }
1069 #endif
1070 }
1071
1072 /****************************************************************************/
1073
1074 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1075 {
1076         char *s;
1077
1078         if (*np == 0) {
1079                 return (p);
1080         }
1081
1082         if (*(--p) == '\t') {                   /* will retype the whole line   */
1083                 while (*colp > plen) {
1084                         puts (erase_seq);
1085                         (*colp)--;
1086                 }
1087                 for (s=buffer; s<p; ++s) {
1088                         if (*s == '\t') {
1089                                 puts (tab_seq+((*colp) & 07));
1090                                 *colp += 8 - ((*colp) & 07);
1091                         } else {
1092                                 ++(*colp);
1093                                 putc (*s);
1094                         }
1095                 }
1096         } else {
1097                 puts (erase_seq);
1098                 (*colp)--;
1099         }
1100         (*np)--;
1101         return (p);
1102 }
1103
1104 /****************************************************************************/
1105
1106 int parse_line (char *line, char *argv[])
1107 {
1108         int nargs = 0;
1109
1110 #ifdef DEBUG_PARSER
1111         printf ("parse_line: \"%s\"\n", line);
1112 #endif
1113         while (nargs < CONFIG_SYS_MAXARGS) {
1114
1115                 /* skip any white space */
1116                 while (isblank(*line))
1117                         ++line;
1118
1119                 if (*line == '\0') {    /* end of line, no more args    */
1120                         argv[nargs] = NULL;
1121 #ifdef DEBUG_PARSER
1122                 printf ("parse_line: nargs=%d\n", nargs);
1123 #endif
1124                         return (nargs);
1125                 }
1126
1127                 argv[nargs++] = line;   /* begin of argument string     */
1128
1129                 /* find end of string */
1130                 while (*line && !isblank(*line))
1131                         ++line;
1132
1133                 if (*line == '\0') {    /* end of line, no more args    */
1134                         argv[nargs] = NULL;
1135 #ifdef DEBUG_PARSER
1136                 printf ("parse_line: nargs=%d\n", nargs);
1137 #endif
1138                         return (nargs);
1139                 }
1140
1141                 *line++ = '\0';         /* terminate current arg         */
1142         }
1143
1144         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1145
1146 #ifdef DEBUG_PARSER
1147         printf ("parse_line: nargs=%d\n", nargs);
1148 #endif
1149         return (nargs);
1150 }
1151
1152 /****************************************************************************/
1153
1154 static void process_macros (const char *input, char *output)
1155 {
1156         char c, prev;
1157         const char *varname_start = NULL;
1158         int inputcnt = strlen (input);
1159         int outputcnt = CONFIG_SYS_CBSIZE;
1160         int state = 0;          /* 0 = waiting for '$'  */
1161
1162         /* 1 = waiting for '(' or '{' */
1163         /* 2 = waiting for ')' or '}' */
1164         /* 3 = waiting for '''  */
1165 #ifdef DEBUG_PARSER
1166         char *output_start = output;
1167
1168         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1169                 input);
1170 #endif
1171
1172         prev = '\0';            /* previous character   */
1173
1174         while (inputcnt && outputcnt) {
1175                 c = *input++;
1176                 inputcnt--;
1177
1178                 if (state != 3) {
1179                         /* remove one level of escape characters */
1180                         if ((c == '\\') && (prev != '\\')) {
1181                                 if (inputcnt-- == 0)
1182                                         break;
1183                                 prev = c;
1184                                 c = *input++;
1185                         }
1186                 }
1187
1188                 switch (state) {
1189                 case 0: /* Waiting for (unescaped) $    */
1190                         if ((c == '\'') && (prev != '\\')) {
1191                                 state = 3;
1192                                 break;
1193                         }
1194                         if ((c == '$') && (prev != '\\')) {
1195                                 state++;
1196                         } else {
1197                                 *(output++) = c;
1198                                 outputcnt--;
1199                         }
1200                         break;
1201                 case 1: /* Waiting for (        */
1202                         if (c == '(' || c == '{') {
1203                                 state++;
1204                                 varname_start = input;
1205                         } else {
1206                                 state = 0;
1207                                 *(output++) = '$';
1208                                 outputcnt--;
1209
1210                                 if (outputcnt) {
1211                                         *(output++) = c;
1212                                         outputcnt--;
1213                                 }
1214                         }
1215                         break;
1216                 case 2: /* Waiting for )        */
1217                         if (c == ')' || c == '}') {
1218                                 int i;
1219                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1220                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1221
1222                                 /* Get the varname */
1223                                 for (i = 0; i < envcnt; i++) {
1224                                         envname[i] = varname_start[i];
1225                                 }
1226                                 envname[i] = 0;
1227
1228                                 /* Get its value */
1229                                 envval = getenv (envname);
1230
1231                                 /* Copy into the line if it exists */
1232                                 if (envval != NULL)
1233                                         while ((*envval) && outputcnt) {
1234                                                 *(output++) = *(envval++);
1235                                                 outputcnt--;
1236                                         }
1237                                 /* Look for another '$' */
1238                                 state = 0;
1239                         }
1240                         break;
1241                 case 3: /* Waiting for '        */
1242                         if ((c == '\'') && (prev != '\\')) {
1243                                 state = 0;
1244                         } else {
1245                                 *(output++) = c;
1246                                 outputcnt--;
1247                         }
1248                         break;
1249                 }
1250                 prev = c;
1251         }
1252
1253         if (outputcnt)
1254                 *output = 0;
1255         else
1256                 *(output - 1) = 0;
1257
1258 #ifdef DEBUG_PARSER
1259         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1260                 strlen (output_start), output_start);
1261 #endif
1262 }
1263
1264 /****************************************************************************
1265  * returns:
1266  *      1  - command executed, repeatable
1267  *      0  - command executed but not repeatable, interrupted commands are
1268  *           always considered not repeatable
1269  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1270  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1271  *           considered unrecognized)
1272  *
1273  * WARNING:
1274  *
1275  * We must create a temporary copy of the command since the command we get
1276  * may be the result from getenv(), which returns a pointer directly to
1277  * the environment data, which may change magicly when the command we run
1278  * creates or modifies environment variables (like "bootp" does).
1279  */
1280
1281 int run_command (const char *cmd, int flag)
1282 {
1283         cmd_tbl_t *cmdtp;
1284         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1285         char *token;                    /* start of token in cmdbuf     */
1286         char *sep;                      /* end of token (separator) in cmdbuf */
1287         char finaltoken[CONFIG_SYS_CBSIZE];
1288         char *str = cmdbuf;
1289         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1290         int argc, inquotes;
1291         int repeatable = 1;
1292         int rc = 0;
1293
1294 #ifdef DEBUG_PARSER
1295         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1296         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1297         puts ("\"\n");
1298 #endif
1299
1300         clear_ctrlc();          /* forget any previous Control C */
1301
1302         if (!cmd || !*cmd) {
1303                 return -1;      /* empty command */
1304         }
1305
1306         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1307                 puts ("## Command too long!\n");
1308                 return -1;
1309         }
1310
1311         strcpy (cmdbuf, cmd);
1312
1313         /* Process separators and check for invalid
1314          * repeatable commands
1315          */
1316
1317 #ifdef DEBUG_PARSER
1318         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1319 #endif
1320         while (*str) {
1321
1322                 /*
1323                  * Find separator, or string end
1324                  * Allow simple escape of ';' by writing "\;"
1325                  */
1326                 for (inquotes = 0, sep = str; *sep; sep++) {
1327                         if ((*sep=='\'') &&
1328                             (*(sep-1) != '\\'))
1329                                 inquotes=!inquotes;
1330
1331                         if (!inquotes &&
1332                             (*sep == ';') &&    /* separator            */
1333                             ( sep != str) &&    /* past string start    */
1334                             (*(sep-1) != '\\')) /* and NOT escaped      */
1335                                 break;
1336                 }
1337
1338                 /*
1339                  * Limit the token to data between separators
1340                  */
1341                 token = str;
1342                 if (*sep) {
1343                         str = sep + 1;  /* start of command for next pass */
1344                         *sep = '\0';
1345                 }
1346                 else
1347                         str = sep;      /* no more commands for next pass */
1348 #ifdef DEBUG_PARSER
1349                 printf ("token: \"%s\"\n", token);
1350 #endif
1351
1352                 /* find macros in this token and replace them */
1353                 process_macros (token, finaltoken);
1354
1355                 /* Extract arguments */
1356                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1357                         rc = -1;        /* no command at all */
1358                         continue;
1359                 }
1360
1361                 /* Look up command in command table */
1362                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1363                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1364                         rc = -1;        /* give up after bad command */
1365                         continue;
1366                 }
1367
1368                 /* found - check max args */
1369                 if (argc > cmdtp->maxargs) {
1370                         cmd_usage(cmdtp);
1371                         rc = -1;
1372                         continue;
1373                 }
1374
1375 #if defined(CONFIG_CMD_BOOTD)
1376                 /* avoid "bootd" recursion */
1377                 if (cmdtp->cmd == do_bootd) {
1378 #ifdef DEBUG_PARSER
1379                         printf ("[%s]\n", finaltoken);
1380 #endif
1381                         if (flag & CMD_FLAG_BOOTD) {
1382                                 puts ("'bootd' recursion detected\n");
1383                                 rc = -1;
1384                                 continue;
1385                         } else {
1386                                 flag |= CMD_FLAG_BOOTD;
1387                         }
1388                 }
1389 #endif
1390
1391                 /* OK - call function to do the command */
1392                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1393                         rc = -1;
1394                 }
1395
1396                 repeatable &= cmdtp->repeatable;
1397
1398                 /* Did the user stop this? */
1399                 if (had_ctrlc ())
1400                         return -1;      /* if stopped then not repeatable */
1401         }
1402
1403         return rc ? rc : repeatable;
1404 }
1405
1406 /****************************************************************************/
1407
1408 #if defined(CONFIG_CMD_RUN)
1409 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1410 {
1411         int i;
1412
1413         if (argc < 2)
1414                 return cmd_usage(cmdtp);
1415
1416         for (i=1; i<argc; ++i) {
1417                 char *arg;
1418
1419                 if ((arg = getenv (argv[i])) == NULL) {
1420                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1421                         return 1;
1422                 }
1423
1424                 if (run_command2(arg, flag) != 0)
1425                         return 1;
1426         }
1427         return 0;
1428 }
1429 #endif