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