common/main.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Add to readline cmdline-editing by
   6  * (C) Copyright 2005
   7  * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /* #define      DEBUG   */
  29
  30 #include <common.h>
  31 #include <watchdog.h>
  32 #include <command.h>
  33 #ifdef CONFIG_MODEM_SUPPORT
  34 #include <malloc.h>             /* for free() prototype */
  35 #endif
  36
  37 #ifdef CFG_HUSH_PARSER
  38 #include <hush.h>
  39 #endif
  40
  41 #include <post.h>
  42
  43 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
  44 DECLARE_GLOBAL_DATA_PTR;
  45 #endif
  46
  47 /*
  48  * Board-specific Platform code can reimplement show_boot_progress () if needed
  49  */
  50 void inline __show_boot_progress (int val) {}
  51 void inline show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  52
  53 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
  54 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);               /* for do_reset() prototype */
  55 #endif
  56
  57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  58
  59 #if defined(CONFIG_UPDATE_TFTP)
  60 void update_tftp (void);
  61 #endif /* CONFIG_UPDATE_TFTP */
  62
  63 #define MAX_DELAY_STOP_STR 32
  64
  65 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  66 static int abortboot(int);
  67 #endif
  68
  69 #undef DEBUG_PARSER
  70
  71 char        console_buffer[CFG_CBSIZE];         /* console I/O buffer   */
  72
  73 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  74 static char erase_seq[] = "\b \b";              /* erase sequence       */
  75 static char   tab_seq[] = "        ";           /* used to expand TABs  */
  76
  77 #ifdef CONFIG_BOOT_RETRY_TIME
  78 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  79 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  80 #endif
  81
  82 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  83
  84 #ifndef CONFIG_BOOT_RETRY_MIN
  85 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  86 #endif
  87
  88 #ifdef CONFIG_MODEM_SUPPORT
  89 int do_mdm_init = 0;
  90 extern void mdm_init(void); /* defined in board.c */
  91 #endif
  92
  93 /***************************************************************************
  94  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  95  * returns: 0 -  no key string, allow autoboot
  96  *          1 - got key string, abort
  97  */
  98 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  99 # if defined(CONFIG_AUTOBOOT_KEYED)
 100 static __inline__ int abortboot(int bootdelay)
 101 {
 102         int abort = 0;
 103         uint64_t etime = endtick(bootdelay);
 104         struct {
 105                 char* str;
 106                 u_int len;
 107                 int retry;
 108         }
 109         delaykey [] = {
 110                 { str: getenv ("bootdelaykey"),  retry: 1 },
 111                 { str: getenv ("bootdelaykey2"), retry: 1 },
 112                 { str: getenv ("bootstopkey"),   retry: 0 },
 113                 { str: getenv ("bootstopkey2"),  retry: 0 },
 114         };
 115
 116         char presskey [MAX_DELAY_STOP_STR];
 117         u_int presskey_len = 0;
 118         u_int presskey_max = 0;
 119         u_int i;
 120
 121 #  ifdef CONFIG_AUTOBOOT_PROMPT
 122         printf(CONFIG_AUTOBOOT_PROMPT);
 123 #  endif
 124
 125 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 126         if (delaykey[0].str == NULL)
 127                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 128 #  endif
 129 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 130         if (delaykey[1].str == NULL)
 131                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 132 #  endif
 133 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 134         if (delaykey[2].str == NULL)
 135                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 136 #  endif
 137 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 138         if (delaykey[3].str == NULL)
 139                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 140 #  endif
 141
 142         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 143                 delaykey[i].len = delaykey[i].str == NULL ?
 144                                     0 : strlen (delaykey[i].str);
 145                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 146                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 147
 148                 presskey_max = presskey_max > delaykey[i].len ?
 149                                     presskey_max : delaykey[i].len;
 150
 151 #  if DEBUG_BOOTKEYS
 152                 printf("%s key:<%s>\n",
 153                        delaykey[i].retry ? "delay" : "stop",
 154                        delaykey[i].str ? delaykey[i].str : "NULL");
 155 #  endif
 156         }
 157
 158         /* In order to keep up with incoming data, check timeout only
 159          * when catch up.
 160          */
 161         while (!abort && get_ticks() <= etime) {
 162                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 163                         if (delaykey[i].len > 0 &&
 164                             presskey_len >= delaykey[i].len &&
 165                             memcmp (presskey + presskey_len - delaykey[i].len,
 166                                     delaykey[i].str,
 167                                     delaykey[i].len) == 0) {
 168 #  if DEBUG_BOOTKEYS
 169                                 printf("got %skey\n",
 170                                        delaykey[i].retry ? "delay" : "stop");
 171 #  endif
 172
 173 #  ifdef CONFIG_BOOT_RETRY_TIME
 174                                 /* don't retry auto boot */
 175                                 if (! delaykey[i].retry)
 176                                         retry_time = -1;
 177 #  endif
 178                                 abort = 1;
 179                         }
 180                 }
 181
 182                 if (tstc()) {
 183                         if (presskey_len < presskey_max) {
 184                                 presskey [presskey_len ++] = getc();
 185                         }
 186                         else {
 187                                 for (i = 0; i < presskey_max - 1; i ++)
 188                                         presskey [i] = presskey [i + 1];
 189
 190                                 presskey [i] = getc();
 191                         }
 192                 }
 193         }
 194 #  if DEBUG_BOOTKEYS
 195         if (!abort)
 196                 puts("key timeout\n");
 197 #  endif
 198
 199 #ifdef CONFIG_SILENT_CONSOLE
 200         if (abort)
 201                 gd->flags &= ~GD_FLG_SILENT;
 202 #endif
 203
 204         return abort;
 205 }
 206
 207 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 208
 209 #ifdef CONFIG_MENUKEY
 210 static int menukey = 0;
 211 #endif
 212
 213 static __inline__ int abortboot(int bootdelay)
 214 {
 215         int abort = 0;
 216
 217 #ifdef CONFIG_MENUPROMPT
 218         printf(CONFIG_MENUPROMPT);
 219 #else
 220         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 221 #endif
 222
 223 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 224         /*
 225          * Check if key already pressed
 226          * Don't check if bootdelay < 0
 227          */
 228         if (bootdelay >= 0) {
 229                 if (tstc()) {   /* we got a key press   */
 230                         (void) getc();  /* consume input        */
 231                         puts ("\b\b\b 0");
 232                         abort = 1;      /* don't auto boot      */
 233                 }
 234         }
 235 #endif
 236
 237         while ((bootdelay > 0) && (!abort)) {
 238                 int i;
 239
 240                 --bootdelay;
 241                 /* delay 100 * 10ms */
 242                 for (i=0; !abort && i<100; ++i) {
 243                         if (tstc()) {   /* we got a key press   */
 244                                 abort  = 1;     /* don't auto boot      */
 245                                 bootdelay = 0;  /* no more delay        */
 246 # ifdef CONFIG_MENUKEY
 247                                 menukey = getc();
 248 # else
 249                                 (void) getc();  /* consume input        */
 250 # endif
 251                                 break;
 252                         }
 253                         udelay(10000);
 254                 }
 255
 256                 printf("\b\b\b%2d ", bootdelay);
 257         }
 258
 259         putc('\n');
 260
 261 #ifdef CONFIG_SILENT_CONSOLE
 262         if (abort)
 263                 gd->flags &= ~GD_FLG_SILENT;
 264 #endif
 265
 266         return abort;
 267 }
 268 # endif /* CONFIG_AUTOBOOT_KEYED */
 269 #endif  /* CONFIG_BOOTDELAY >= 0  */
 270
 271 /****************************************************************************/
 272
 273 void main_loop (void)
 274 {
 275 #ifndef CFG_HUSH_PARSER
 276         static char lastcommand[CFG_CBSIZE] = { 0, };
 277         int len;
 278         int rc = 1;
 279         int flag;
 280 #endif
 281
 282 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 283         char *s;
 284         int bootdelay;
 285 #endif
 286 #ifdef CONFIG_PREBOOT
 287         char *p;
 288 #endif
 289 #ifdef CONFIG_BOOTCOUNT_LIMIT
 290         unsigned long bootcount = 0;
 291         unsigned long bootlimit = 0;
 292         char *bcs;
 293         char bcs_set[16];
 294 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 295
 296 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
 297         ulong bmp = 0;          /* default bitmap */
 298         extern int trab_vfd (ulong bitmap);
 299
 300 #ifdef CONFIG_MODEM_SUPPORT
 301         if (do_mdm_init)
 302                 bmp = 1;        /* alternate bitmap */
 303 #endif
 304         trab_vfd (bmp);
 305 #endif  /* CONFIG_VFD && VFD_TEST_LOGO */
 306
 307 #if defined(CONFIG_UPDATE_TFTP)
 308         update_tftp ();
 309 #endif /* CONFIG_UPDATE_TFTP */
 310
 311 #ifdef CONFIG_BOOTCOUNT_LIMIT
 312         bootcount = bootcount_load();
 313         bootcount++;
 314         bootcount_store (bootcount);
 315         sprintf (bcs_set, "%lu", bootcount);
 316         setenv ("bootcount", bcs_set);
 317         bcs = getenv ("bootlimit");
 318         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 319 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 320
 321 #ifdef CONFIG_MODEM_SUPPORT
 322         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 323         if (do_mdm_init) {
 324                 char *str = strdup(getenv("mdm_cmd"));
 325                 setenv ("preboot", str);  /* set or delete definition */
 326                 if (str != NULL)
 327                         free (str);
 328                 mdm_init(); /* wait for modem connection */
 329         }
 330 #endif  /* CONFIG_MODEM_SUPPORT */
 331
 332 #ifdef CONFIG_VERSION_VARIABLE
 333         {
 334                 extern char version_string[];
 335
 336                 setenv ("ver", version_string);  /* set version variable */
 337         }
 338 #endif /* CONFIG_VERSION_VARIABLE */
 339
 340 #ifdef CFG_HUSH_PARSER
 341         u_boot_hush_start ();
 342 #endif
 343
 344 #if defined(CONFIG_HUSH_INIT_VAR)
 345         hush_init_var ();
 346 #endif
 347
 348 #ifdef CONFIG_AUTO_COMPLETE
 349         install_auto_complete();
 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 # ifndef CFG_HUSH_PARSER
 359                 run_command (p, 0);
 360 # else
 361                 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
 362                                     FLAG_EXIT_FROM_LOOP);
 363 # endif
 364
 365 # ifdef CONFIG_AUTOBOOT_KEYED
 366                 disable_ctrlc(prev);    /* restore Control C checking */
 367 # endif
 368         }
 369 #endif /* CONFIG_PREBOOT */
 370
 371 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 372         s = getenv ("bootdelay");
 373         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 374
 375         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 376
 377 # ifdef CONFIG_BOOT_RETRY_TIME
 378         init_cmd_timeout ();
 379 # endif /* CONFIG_BOOT_RETRY_TIME */
 380
 381 #ifdef CONFIG_POST
 382         if (gd->flags & GD_FLG_POSTFAIL) {
 383                 s = getenv("failbootcmd");
 384         }
 385         else
 386 #endif /* CONFIG_POST */
 387 #ifdef CONFIG_BOOTCOUNT_LIMIT
 388         if (bootlimit && (bootcount > bootlimit)) {
 389                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 390                         (unsigned)bootlimit);
 391                 s = getenv ("altbootcmd");
 392         }
 393         else
 394 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 395                 s = getenv ("bootcmd");
 396
 397         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 398
 399         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 400 # ifdef CONFIG_AUTOBOOT_KEYED
 401                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 402 # endif
 403
 404 # ifndef CFG_HUSH_PARSER
 405                 run_command (s, 0);
 406 # else
 407                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 408                                     FLAG_EXIT_FROM_LOOP);
 409 # endif
 410
 411 # ifdef CONFIG_AUTOBOOT_KEYED
 412                 disable_ctrlc(prev);    /* restore Control C checking */
 413 # endif
 414         }
 415
 416 # ifdef CONFIG_MENUKEY
 417         if (menukey == CONFIG_MENUKEY) {
 418             s = getenv("menucmd");
 419             if (s) {
 420 # ifndef CFG_HUSH_PARSER
 421                 run_command (s, 0);
 422 # else
 423                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 424                                     FLAG_EXIT_FROM_LOOP);
 425 # endif
 426             }
 427         }
 428 #endif /* CONFIG_MENUKEY */
 429 #endif  /* CONFIG_BOOTDELAY */
 430
 431 #ifdef CONFIG_AMIGAONEG3SE
 432         {
 433             extern void video_banner(void);
 434             video_banner();
 435         }
 436 #endif
 437
 438         /*
 439          * Main Loop for Monitor Command Processing
 440          */
 441 #ifdef CFG_HUSH_PARSER
 442         parse_file_outer();
 443         /* This point is never reached */
 444         for (;;);
 445 #else
 446         for (;;) {
 447 #ifdef CONFIG_BOOT_RETRY_TIME
 448                 if (rc >= 0) {
 449                         /* Saw enough of a valid command to
 450                          * restart the timeout.
 451                          */
 452                         reset_cmd_timeout();
 453                 }
 454 #endif
 455                 len = readline (CFG_PROMPT);
 456
 457                 flag = 0;       /* assume no special flags for now */
 458                 if (len > 0)
 459                         strcpy (lastcommand, console_buffer);
 460                 else if (len == 0)
 461                         flag |= CMD_FLAG_REPEAT;
 462 #ifdef CONFIG_BOOT_RETRY_TIME
 463                 else if (len == -2) {
 464                         /* -2 means timed out, retry autoboot
 465                          */
 466                         puts ("\nTimed out waiting for command\n");
 467 # ifdef CONFIG_RESET_TO_RETRY
 468                         /* Reinit board to run initialization code again */
 469                         do_reset (NULL, 0, 0, NULL);
 470 # else
 471                         return;         /* retry autoboot */
 472 # endif
 473                 }
 474 #endif
 475
 476                 if (len == -1)
 477                         puts ("<INTERRUPT>\n");
 478                 else
 479                         rc = run_command (lastcommand, flag);
 480
 481                 if (rc <= 0) {
 482                         /* invalid command or not repeatable, forget it */
 483                         lastcommand[0] = 0;
 484                 }
 485         }
 486 #endif /*CFG_HUSH_PARSER*/
 487 }
 488
 489 #ifdef CONFIG_BOOT_RETRY_TIME
 490 /***************************************************************************
 491  * initialize command line timeout
 492  */
 493 void init_cmd_timeout(void)
 494 {
 495         char *s = getenv ("bootretry");
 496
 497         if (s != NULL)
 498                 retry_time = (int)simple_strtol(s, NULL, 10);
 499         else
 500                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 501
 502         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 503                 retry_time = CONFIG_BOOT_RETRY_MIN;
 504 }
 505
 506 /***************************************************************************
 507  * reset command line timeout to retry_time seconds
 508  */
 509 void reset_cmd_timeout(void)
 510 {
 511         endtime = endtick(retry_time);
 512 }
 513 #endif
 514
 515 #ifdef CONFIG_CMDLINE_EDITING
 516
 517 /*
 518  * cmdline-editing related codes from vivi.
 519  * Author: Janghoon Lyu <nandy@mizi.com>
 520  */
 521
 522 #define putnstr(str,n)  do {                    \
 523                 printf ("%.*s", (int)n, str);   \
 524         } while (0)
 525
 526 #define CTL_CH(c)               ((c) - 'a' + 1)
 527
 528 #define MAX_CMDBUF_SIZE         256
 529
 530 #define CTL_BACKSPACE           ('\b')
 531 #define DEL                     ((char)255)
 532 #define DEL7                    ((char)127)
 533 #define CREAD_HIST_CHAR         ('!')
 534
 535 #define getcmd_putch(ch)        putc(ch)
 536 #define getcmd_getch()          getc()
 537 #define getcmd_cbeep()          getcmd_putch('\a')
 538
 539 #define HIST_MAX                20
 540 #define HIST_SIZE               MAX_CMDBUF_SIZE
 541
 542 static int hist_max = 0;
 543 static int hist_add_idx = 0;
 544 static int hist_cur = -1;
 545 unsigned hist_num = 0;
 546
 547 char* hist_list[HIST_MAX];
 548 char hist_lines[HIST_MAX][HIST_SIZE];
 549
 550 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 551
 552 static void hist_init(void)
 553 {
 554         int i;
 555
 556         hist_max = 0;
 557         hist_add_idx = 0;
 558         hist_cur = -1;
 559         hist_num = 0;
 560
 561         for (i = 0; i < HIST_MAX; i++) {
 562                 hist_list[i] = hist_lines[i];
 563                 hist_list[i][0] = '\0';
 564         }
 565 }
 566
 567 static void cread_add_to_hist(char *line)
 568 {
 569         strcpy(hist_list[hist_add_idx], line);
 570
 571         if (++hist_add_idx >= HIST_MAX)
 572                 hist_add_idx = 0;
 573
 574         if (hist_add_idx > hist_max)
 575                 hist_max = hist_add_idx;
 576
 577         hist_num++;
 578 }
 579
 580 static char* hist_prev(void)
 581 {
 582         char *ret;
 583         int old_cur;
 584
 585         if (hist_cur < 0)
 586                 return NULL;
 587
 588         old_cur = hist_cur;
 589         if (--hist_cur < 0)
 590                 hist_cur = hist_max;
 591
 592         if (hist_cur == hist_add_idx) {
 593                 hist_cur = old_cur;
 594                 ret = NULL;
 595         } else
 596                 ret = hist_list[hist_cur];
 597
 598         return (ret);
 599 }
 600
 601 static char* hist_next(void)
 602 {
 603         char *ret;
 604
 605         if (hist_cur < 0)
 606                 return NULL;
 607
 608         if (hist_cur == hist_add_idx)
 609                 return NULL;
 610
 611         if (++hist_cur > hist_max)
 612                 hist_cur = 0;
 613
 614         if (hist_cur == hist_add_idx) {
 615                 ret = "";
 616         } else
 617                 ret = hist_list[hist_cur];
 618
 619         return (ret);
 620 }
 621
 622 #ifndef CONFIG_CMDLINE_EDITING
 623 static void cread_print_hist_list(void)
 624 {
 625         int i;
 626         unsigned long n;
 627
 628         n = hist_num - hist_max;
 629
 630         i = hist_add_idx + 1;
 631         while (1) {
 632                 if (i > hist_max)
 633                         i = 0;
 634                 if (i == hist_add_idx)
 635                         break;
 636                 printf("%s\n", hist_list[i]);
 637                 n++;
 638                 i++;
 639         }
 640 }
 641 #endif /* CONFIG_CMDLINE_EDITING */
 642
 643 #define BEGINNING_OF_LINE() {                   \
 644         while (num) {                           \
 645                 getcmd_putch(CTL_BACKSPACE);    \
 646                 num--;                          \
 647         }                                       \
 648 }
 649
 650 #define ERASE_TO_EOL() {                                \
 651         if (num < eol_num) {                            \
 652                 int tmp;                                \
 653                 for (tmp = num; tmp < eol_num; tmp++)   \
 654                         getcmd_putch(' ');              \
 655                 while (tmp-- > num)                     \
 656                         getcmd_putch(CTL_BACKSPACE);    \
 657                 eol_num = num;                          \
 658         }                                               \
 659 }
 660
 661 #define REFRESH_TO_EOL() {                      \
 662         if (num < eol_num) {                    \
 663                 wlen = eol_num - num;           \
 664                 putnstr(buf + num, wlen);       \
 665                 num = eol_num;                  \
 666         }                                       \
 667 }
 668
 669 static void cread_add_char(char ichar, int insert, unsigned long *num,
 670                unsigned long *eol_num, char *buf, unsigned long len)
 671 {
 672         unsigned long wlen;
 673
 674         /* room ??? */
 675         if (insert || *num == *eol_num) {
 676                 if (*eol_num > len - 1) {
 677                         getcmd_cbeep();
 678                         return;
 679                 }
 680                 (*eol_num)++;
 681         }
 682
 683         if (insert) {
 684                 wlen = *eol_num - *num;
 685                 if (wlen > 1) {
 686                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 687                 }
 688
 689                 buf[*num] = ichar;
 690                 putnstr(buf + *num, wlen);
 691                 (*num)++;
 692                 while (--wlen) {
 693                         getcmd_putch(CTL_BACKSPACE);
 694                 }
 695         } else {
 696                 /* echo the character */
 697                 wlen = 1;
 698                 buf[*num] = ichar;
 699                 putnstr(buf + *num, wlen);
 700                 (*num)++;
 701         }
 702 }
 703
 704 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 705               unsigned long *eol_num, char *buf, unsigned long len)
 706 {
 707         while (strsize--) {
 708                 cread_add_char(*str, insert, num, eol_num, buf, len);
 709                 str++;
 710         }
 711 }
 712
 713 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
 714 {
 715         unsigned long num = 0;
 716         unsigned long eol_num = 0;
 717         unsigned long rlen;
 718         unsigned long wlen;
 719         char ichar;
 720         int insert = 1;
 721         int esc_len = 0;
 722         int rc = 0;
 723         char esc_save[8];
 724
 725         while (1) {
 726                 rlen = 1;
 727 #ifdef CONFIG_BOOT_RETRY_TIME
 728                 while (!tstc()) {       /* while no incoming data */
 729                         if (retry_time >= 0 && get_ticks() > endtime)
 730                                 return (-2);    /* timed out */
 731                 }
 732 #endif
 733
 734                 ichar = getcmd_getch();
 735
 736                 if ((ichar == '\n') || (ichar == '\r')) {
 737                         putc('\n');
 738                         break;
 739                 }
 740
 741                 /*
 742                  * handle standard linux xterm esc sequences for arrow key, etc.
 743                  */
 744                 if (esc_len != 0) {
 745                         if (esc_len == 1) {
 746                                 if (ichar == '[') {
 747                                         esc_save[esc_len] = ichar;
 748                                         esc_len = 2;
 749                                 } else {
 750                                         cread_add_str(esc_save, esc_len, insert,
 751                                                       &num, &eol_num, buf, *len);
 752                                         esc_len = 0;
 753                                 }
 754                                 continue;
 755                         }
 756
 757                         switch (ichar) {
 758
 759                         case 'D':       /* <- key */
 760                                 ichar = CTL_CH('b');
 761                                 esc_len = 0;
 762                                 break;
 763                         case 'C':       /* -> key */
 764                                 ichar = CTL_CH('f');
 765                                 esc_len = 0;
 766                                 break;  /* pass off to ^F handler */
 767                         case 'H':       /* Home key */
 768                                 ichar = CTL_CH('a');
 769                                 esc_len = 0;
 770                                 break;  /* pass off to ^A handler */
 771                         case 'A':       /* up arrow */
 772                                 ichar = CTL_CH('p');
 773                                 esc_len = 0;
 774                                 break;  /* pass off to ^P handler */
 775                         case 'B':       /* down arrow */
 776                                 ichar = CTL_CH('n');
 777                                 esc_len = 0;
 778                                 break;  /* pass off to ^N handler */
 779                         default:
 780                                 esc_save[esc_len++] = ichar;
 781                                 cread_add_str(esc_save, esc_len, insert,
 782                                               &num, &eol_num, buf, *len);
 783                                 esc_len = 0;
 784                                 continue;
 785                         }
 786                 }
 787
 788                 switch (ichar) {
 789                 case 0x1b:
 790                         if (esc_len == 0) {
 791                                 esc_save[esc_len] = ichar;
 792                                 esc_len = 1;
 793                         } else {
 794                                 puts("impossible condition #876\n");
 795                                 esc_len = 0;
 796                         }
 797                         break;
 798
 799                 case CTL_CH('a'):
 800                         BEGINNING_OF_LINE();
 801                         break;
 802                 case CTL_CH('c'):       /* ^C - break */
 803                         *buf = '\0';    /* discard input */
 804                         return (-1);
 805                 case CTL_CH('f'):
 806                         if (num < eol_num) {
 807                                 getcmd_putch(buf[num]);
 808                                 num++;
 809                         }
 810                         break;
 811                 case CTL_CH('b'):
 812                         if (num) {
 813                                 getcmd_putch(CTL_BACKSPACE);
 814                                 num--;
 815                         }
 816                         break;
 817                 case CTL_CH('d'):
 818                         if (num < eol_num) {
 819                                 wlen = eol_num - num - 1;
 820                                 if (wlen) {
 821                                         memmove(&buf[num], &buf[num+1], wlen);
 822                                         putnstr(buf + num, wlen);
 823                                 }
 824
 825                                 getcmd_putch(' ');
 826                                 do {
 827                                         getcmd_putch(CTL_BACKSPACE);
 828                                 } while (wlen--);
 829                                 eol_num--;
 830                         }
 831                         break;
 832                 case CTL_CH('k'):
 833                         ERASE_TO_EOL();
 834                         break;
 835                 case CTL_CH('e'):
 836                         REFRESH_TO_EOL();
 837                         break;
 838                 case CTL_CH('o'):
 839                         insert = !insert;
 840                         break;
 841                 case CTL_CH('x'):
 842                 case CTL_CH('u'):
 843                         BEGINNING_OF_LINE();
 844                         ERASE_TO_EOL();
 845                         break;
 846                 case DEL:
 847                 case DEL7:
 848                 case 8:
 849                         if (num) {
 850                                 wlen = eol_num - num;
 851                                 num--;
 852                                 memmove(&buf[num], &buf[num+1], wlen);
 853                                 getcmd_putch(CTL_BACKSPACE);
 854                                 putnstr(buf + num, wlen);
 855                                 getcmd_putch(' ');
 856                                 do {
 857                                         getcmd_putch(CTL_BACKSPACE);
 858                                 } while (wlen--);
 859                                 eol_num--;
 860                         }
 861                         break;
 862                 case CTL_CH('p'):
 863                 case CTL_CH('n'):
 864                 {
 865                         char * hline;
 866
 867                         esc_len = 0;
 868
 869                         if (ichar == CTL_CH('p'))
 870                                 hline = hist_prev();
 871                         else
 872                                 hline = hist_next();
 873
 874                         if (!hline) {
 875                                 getcmd_cbeep();
 876                                 continue;
 877                         }
 878
 879                         /* nuke the current line */
 880                         /* first, go home */
 881                         BEGINNING_OF_LINE();
 882
 883                         /* erase to end of line */
 884                         ERASE_TO_EOL();
 885
 886                         /* copy new line into place and display */
 887                         strcpy(buf, hline);
 888                         eol_num = strlen(buf);
 889                         REFRESH_TO_EOL();
 890                         continue;
 891                 }
 892 #ifdef CONFIG_AUTO_COMPLETE
 893                 case '\t': {
 894                         int num2, col;
 895
 896                         /* do not autocomplete when in the middle */
 897                         if (num < eol_num) {
 898                                 getcmd_cbeep();
 899                                 break;
 900                         }
 901
 902                         buf[num] = '\0';
 903                         col = strlen(prompt) + eol_num;
 904                         num2 = num;
 905                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 906                                 col = num2 - num;
 907                                 num += col;
 908                                 eol_num += col;
 909                         }
 910                         break;
 911                 }
 912 #endif
 913                 default:
 914                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 915                         break;
 916                 }
 917         }
 918         *len = eol_num;
 919         buf[eol_num] = '\0';    /* lose the newline */
 920
 921         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 922                 cread_add_to_hist(buf);
 923         hist_cur = hist_add_idx;
 924
 925         return (rc);
 926 }
 927
 928 #endif /* CONFIG_CMDLINE_EDITING */
 929
 930 /****************************************************************************/
 931
 932 /*
 933  * Prompt for input and read a line.
 934  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 935  * time out when time goes past endtime (timebase time in ticks).
 936  * Return:      number of read characters
 937  *              -1 if break
 938  *              -2 if timed out
 939  */
 940 int readline (const char *const prompt)
 941 {
 942         return readline_into_buffer(prompt, console_buffer);
 943 }
 944
 945
 946 int readline_into_buffer (const char *const prompt, char * buffer)
 947 {
 948         char *p = buffer;
 949 #ifdef CONFIG_CMDLINE_EDITING
 950         unsigned int len=MAX_CMDBUF_SIZE;
 951         int rc;
 952         static int initted = 0;
 953
 954         /*
 955          * History uses a global array which is not
 956          * writable until after relocation to RAM.
 957          * Revert to non-history version if still
 958          * running from flash.
 959          */
 960         if (gd->flags & GD_FLG_RELOC) {
 961                 if (!initted) {
 962                         hist_init();
 963                         initted = 1;
 964                 }
 965
 966                 puts (prompt);
 967
 968                 rc = cread_line(prompt, p, &len);
 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                 }
 992 #endif
 993                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 994
 995 #ifdef CONFIG_SHOW_ACTIVITY
 996                 while (!tstc()) {
 997                         extern void show_activity(int arg);
 998                         show_activity(0);
 999                 }
1000 #endif
1001                 c = getc();
1002
1003                 /*
1004                  * Special character handling
1005                  */
1006                 switch (c) {
1007                 case '\r':                              /* Enter                */
1008                 case '\n':
1009                         *p = '\0';
1010                         puts ("\r\n");
1011                         return (p - p_buf);
1012
1013                 case '\0':                              /* nul                  */
1014                         continue;
1015
1016                 case 0x03:                              /* ^C - break           */
1017                         p_buf[0] = '\0';        /* discard input */
1018                         return (-1);
1019
1020                 case 0x15:                              /* ^U - erase line      */
1021                         while (col > plen) {
1022                                 puts (erase_seq);
1023                                 --col;
1024                         }
1025                         p = p_buf;
1026                         n = 0;
1027                         continue;
1028
1029                 case 0x17:                              /* ^W - erase word      */
1030                         p=delete_char(p_buf, p, &col, &n, plen);
1031                         while ((n > 0) && (*p != ' ')) {
1032                                 p=delete_char(p_buf, p, &col, &n, plen);
1033                         }
1034                         continue;
1035
1036                 case 0x08:                              /* ^H  - backspace      */
1037                 case 0x7F:                              /* DEL - backspace      */
1038                         p=delete_char(p_buf, p, &col, &n, plen);
1039                         continue;
1040
1041                 default:
1042                         /*
1043                          * Must be a normal character then
1044                          */
1045                         if (n < CFG_CBSIZE-2) {
1046                                 if (c == '\t') {        /* expand TABs          */
1047 #ifdef CONFIG_AUTO_COMPLETE
1048                                         /* if auto completion triggered just continue */
1049                                         *p = '\0';
1050                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1051                                                 p = p_buf + n;  /* reset */
1052                                                 continue;
1053                                         }
1054 #endif
1055                                         puts (tab_seq+(col&07));
1056                                         col += 8 - (col&07);
1057                                 } else {
1058                                         ++col;          /* echo input           */
1059                                         putc (c);
1060                                 }
1061                                 *p++ = c;
1062                                 ++n;
1063                         } else {                        /* Buffer full          */
1064                                 putc ('\a');
1065                         }
1066                 }
1067         }
1068 #ifdef CONFIG_CMDLINE_EDITING
1069         }
1070 #endif
1071 }
1072
1073 /****************************************************************************/
1074
1075 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1076 {
1077         char *s;
1078
1079         if (*np == 0) {
1080                 return (p);
1081         }
1082
1083         if (*(--p) == '\t') {                   /* will retype the whole line   */
1084                 while (*colp > plen) {
1085                         puts (erase_seq);
1086                         (*colp)--;
1087                 }
1088                 for (s=buffer; s<p; ++s) {
1089                         if (*s == '\t') {
1090                                 puts (tab_seq+((*colp) & 07));
1091                                 *colp += 8 - ((*colp) & 07);
1092                         } else {
1093                                 ++(*colp);
1094                                 putc (*s);
1095                         }
1096                 }
1097         } else {
1098                 puts (erase_seq);
1099                 (*colp)--;
1100         }
1101         (*np)--;
1102         return (p);
1103 }
1104
1105 /****************************************************************************/
1106
1107 int parse_line (char *line, char *argv[])
1108 {
1109         int nargs = 0;
1110
1111 #ifdef DEBUG_PARSER
1112         printf ("parse_line: \"%s\"\n", line);
1113 #endif
1114         while (nargs < CFG_MAXARGS) {
1115
1116                 /* skip any white space */
1117                 while ((*line == ' ') || (*line == '\t')) {
1118                         ++line;
1119                 }
1120
1121                 if (*line == '\0') {    /* end of line, no more args    */
1122                         argv[nargs] = NULL;
1123 #ifdef DEBUG_PARSER
1124                 printf ("parse_line: nargs=%d\n", nargs);
1125 #endif
1126                         return (nargs);
1127                 }
1128
1129                 argv[nargs++] = line;   /* begin of argument string     */
1130
1131                 /* find end of string */
1132                 while (*line && (*line != ' ') && (*line != '\t')) {
1133                         ++line;
1134                 }
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", CFG_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 = CFG_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[CFG_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 CFG_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[CFG_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[CFG_CBSIZE];
1291         char *str = cmdbuf;
1292         char *argv[CFG_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) >= CFG_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                         printf ("Usage:\n%s\n", cmdtp->usage);
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 *argv[])
1413 {
1414         int i;
1415
1416         if (argc < 2) {
1417                 printf ("Usage:\n%s\n", cmdtp->usage);
1418                 return 1;
1419         }
1420
1421         for (i=1; i<argc; ++i) {
1422                 char *arg;
1423
1424                 if ((arg = getenv (argv[i])) == NULL) {
1425                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1426                         return 1;
1427                 }
1428 #ifndef CFG_HUSH_PARSER
1429                 if (run_command (arg, flag) == -1)
1430                         return 1;
1431 #else
1432                 if (parse_string_outer(arg,
1433                     FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1434                         return 1;
1435 #endif
1436         }
1437         return 0;
1438 }
1439 #endif