init/main.c

   1 /*
   2  *  linux/init/main.c
   3  *
   4  *  Copyright (C) 1991, 1992  Linus Torvalds
   5  *
   6  *  GK 2/5/95  -  Changed to support mounting root fs via NFS
   7  *  Added initrd & change_root: Werner Almesberger & Hans Lermen, Feb '96
   8  *  Moan early if gcc is old, avoiding bogus kernels - Paul Gortmaker, May '96
   9  *  Simplified starting of init:  Michael A. Griffith <grif@acm.org>
  10  */
  11
  12 #define __KERNEL_SYSCALLS__
  13
  14 #include <linux/types.h>
  15 #include <linux/fcntl.h>
  16 #include <linux/config.h>
  17 #include <linux/sched.h>
  18 #include <linux/kernel.h>
  19 #include <linux/tty.h>
  20 #include <linux/unistd.h>
  21 #include <linux/string.h>
  22 #include <linux/timer.h>
  23 #include <linux/fs.h>
  24 #include <linux/proc_fs.h>
  25 #include <linux/ctype.h>
  26 #include <linux/delay.h>
  27 #include <linux/utsname.h>
  28 #include <linux/ioport.h>
  29 #include <linux/hdreg.h>
  30 #include <linux/mm.h>
  31 #include <linux/slab.h>
  32 #include <linux/major.h>
  33 #include <linux/blk.h>
  34 #include <linux/init.h>
  35
  36 #include <asm/system.h>
  37 #include <asm/io.h>
  38 #include <asm/bugs.h>
  39
  40 #include <stdarg.h>
  41
  42 #ifdef CONFIG_PCI
  43 #include <linux/pci.h>
  44 #endif
  45
  46 #ifdef CONFIG_DIO
  47 #include <linux/dio.h>
  48 #endif
  49
  50 #ifdef CONFIG_MTRR
  51 #  include <asm/mtrr.h>
  52 #endif
  53
  54 /*
  55  * Versions of gcc older than that listed below may actually compile
  56  * and link okay, but the end product can have subtle run time bugs.
  57  * To avoid associated bogus bug reports, we flatly refuse to compile
  58  * with a gcc that is known to be too old from the very beginning.
  59  */
  60 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
  61 #error sorry, your GCC is too old. It builds incorrect kernels.
  62 #endif
  63
  64 extern char _stext, _etext;
  65 extern char *linux_banner;
  66
  67 extern int console_loglevel;
  68
  69 static int init(void *);
  70 extern int bdflush(void *);
  71 extern int kswapd(void *);
  72 extern void kswapd_setup(void);
  73
  74 extern void init_IRQ(void);
  75 extern void init_modules(void);
  76 extern long console_init(long, long);
  77 extern void sock_init(void);
  78 extern void uidcache_init(void);
  79 extern void mca_init(void);
  80 extern long sbus_init(long, long);
  81 extern long powermac_init(unsigned long, unsigned long);
  82 extern void sysctl_init(void);
  83 extern void filescache_init(void);
  84 extern void signals_init(void);
  85
  86 extern void device_setup(void);
  87 extern void binfmt_setup(void);
  88 extern void free_initmem(void);
  89 extern void filesystem_setup(void);
  90
  91 #ifdef CONFIG_ARCH_ACORN
  92 extern void ecard_init(void);
  93 #endif
  94
  95 extern void smp_setup(char *str, int *ints);
  96 #ifdef __i386__
  97 extern void ioapic_pirq_setup(char *str, int *ints);
  98 #endif
  99 extern void no_scroll(char *str, int *ints);
 100 extern void kbd_reset_setup(char *str, int *ints);
 101 extern void panic_setup(char *str, int *ints);
 102 extern void bmouse_setup(char *str, int *ints);
 103 extern void msmouse_setup(char *str, int *ints);
 104 extern void console_setup(char *str, int *ints);
 105 #ifdef CONFIG_PRINTER
 106 extern void lp_setup(char *str, int *ints);
 107 #endif
 108 #ifdef CONFIG_JOYSTICK
 109 extern void js_setup(char *str, int *ints);
 110 #endif
 111 extern void eth_setup(char *str, int *ints);
 112 #ifdef CONFIG_ARCNET_COM20020
 113 extern void com20020_setup(char *str, int *ints);
 114 #endif
 115 #ifdef CONFIG_ARCNET_RIM_I
 116 extern void arcrimi_setup(char *str, int *ints);
 117 #endif
 118 #ifdef CONFIG_ARCNET_COM90xxIO
 119 extern void com90io_setup(char *str, int *ints);
 120 #endif
 121 #ifdef CONFIG_ARCNET_COM90xx
 122 extern void com90xx_setup(char *str, int *ints);
 123 #endif
 124 #ifdef CONFIG_DECNET
 125 extern void decnet_setup(char *str, int *ints);
 126 #endif
 127 #ifdef CONFIG_BLK_DEV_XD
 128 extern void xd_setup(char *str, int *ints);
 129 extern void xd_manual_geo_init(char *str, int *ints);
 130 #endif
 131 #ifdef CONFIG_BLK_DEV_IDE
 132 extern void ide_setup(char *);
 133 #endif
 134 #ifdef CONFIG_PARIDE_PD
 135 extern void pd_setup(char *str, int *ints);
 136 #endif
 137 #ifdef CONFIG_PARIDE_PF
 138 extern void pf_setup(char *str, int *ints);
 139 #endif
 140 #ifdef CONFIG_PARIDE_PT
 141 extern void pt_setup(char *str, int *ints);
 142 #endif
 143 #ifdef CONFIG_PARIDE_PG
 144 extern void pg_setup(char *str, int *ints);
 145 #endif
 146 #ifdef CONFIG_PARIDE_PCD
 147 extern void pcd_setup(char *str, int *ints);
 148 #endif
 149 extern void floppy_setup(char *str, int *ints);
 150 extern void st_setup(char *str, int *ints);
 151 extern void st0x_setup(char *str, int *ints);
 152 extern void advansys_setup(char *str, int *ints);
 153 extern void tmc8xx_setup(char *str, int *ints);
 154 extern void t128_setup(char *str, int *ints);
 155 extern void pas16_setup(char *str, int *ints);
 156 extern void generic_NCR5380_setup(char *str, int *intr);
 157 extern void generic_NCR53C400_setup(char *str, int *intr);
 158 extern void generic_NCR53C400A_setup(char *str, int *intr);
 159 extern void generic_DTC3181E_setup(char *str, int *intr);
 160 extern void aha152x_setup(char *str, int *ints);
 161 extern void aha1542_setup(char *str, int *ints);
 162 extern void gdth_setup(char *str, int *ints);
 163 extern void aic7xxx_setup(char *str, int *ints);
 164 extern void AM53C974_setup(char *str, int *ints);
 165 extern void BusLogic_Setup(char *str, int *ints);
 166 extern void ncr53c8xx_setup(char *str, int *ints);
 167 extern void eata2x_setup(char *str, int *ints);
 168 extern void u14_34f_setup(char *str, int *ints);
 169 extern void fdomain_setup(char *str, int *ints);
 170 extern void ibmmca_scsi_setup(char *str, int *ints);
 171 extern void in2000_setup(char *str, int *ints);
 172 extern void NCR53c406a_setup(char *str, int *ints);
 173 extern void wd7000_setup(char *str, int *ints);
 174 extern void scsi_luns_setup(char *str, int *ints);
 175 extern void scsi_logging_setup(char *str, int *ints);
 176 extern void sound_setup(char *str, int *ints);
 177 extern void reboot_setup(char *str, int *ints);
 178 extern void video_setup(char *str, int *ints);
 179 #ifdef CONFIG_CDU31A
 180 extern void cdu31a_setup(char *str, int *ints);
 181 #endif CONFIG_CDU31A
 182 #ifdef CONFIG_BLK_DEV_PS2
 183 extern void ed_setup(char *str, int *ints);
 184 extern void tp720_setup(char *str, int *ints);
 185 #endif CONFIG_BLK_DEV_PS2
 186 #ifdef CONFIG_MCD
 187 extern void mcd_setup(char *str, int *ints);
 188 #endif CONFIG_MCD
 189 #ifdef CONFIG_MCDX
 190 extern void mcdx_setup(char *str, int *ints);
 191 #endif CONFIG_MCDX
 192 #ifdef CONFIG_SBPCD
 193 extern void sbpcd_setup(char *str, int *ints);
 194 #endif CONFIG_SBPCD
 195 #ifdef CONFIG_AZTCD
 196 extern void aztcd_setup(char *str, int *ints);
 197 #endif CONFIG_AZTCD
 198 #ifdef CONFIG_CDU535
 199 extern void sonycd535_setup(char *str, int *ints);
 200 #endif CONFIG_CDU535
 201 #ifdef CONFIG_GSCD
 202 extern void gscd_setup(char *str, int *ints);
 203 #endif CONFIG_GSCD
 204 #ifdef CONFIG_CM206
 205 extern void cm206_setup(char *str, int *ints);
 206 #endif CONFIG_CM206
 207 #ifdef CONFIG_OPTCD
 208 extern void optcd_setup(char *str, int *ints);
 209 #endif CONFIG_OPTCD
 210 #ifdef CONFIG_SJCD
 211 extern void sjcd_setup(char *str, int *ints);
 212 #endif CONFIG_SJCD
 213 #ifdef CONFIG_ISP16_CDI
 214 extern void isp16_setup(char *str, int *ints);
 215 #endif CONFIG_ISP16_CDI
 216 #ifdef CONFIG_BLK_DEV_RAM
 217 static void ramdisk_start_setup(char *str, int *ints);
 218 static void load_ramdisk(char *str, int *ints);
 219 static void prompt_ramdisk(char *str, int *ints);
 220 static void ramdisk_size(char *str, int *ints);
 221 #ifdef CONFIG_BLK_DEV_INITRD
 222 static void no_initrd(char *s,int *ints);
 223 #endif
 224 #endif CONFIG_BLK_DEV_RAM
 225 #ifdef CONFIG_ISDN_DRV_ICN
 226 extern void icn_setup(char *str, int *ints);
 227 #endif
 228 #ifdef CONFIG_ISDN_DRV_HISAX
 229 extern void HiSax_setup(char *str, int *ints);
 230 #endif
 231 #ifdef CONFIG_DIGIEPCA
 232 extern void epca_setup(char *str, int *ints);
 233 #endif
 234 #ifdef CONFIG_ISDN_DRV_PCBIT
 235 extern void pcbit_setup(char *str, int *ints);
 236 #endif
 237
 238 #ifdef CONFIG_ATARIMOUSE
 239 extern void atari_mouse_setup (char *str, int *ints);
 240 #endif
 241 #ifdef CONFIG_DMASOUND
 242 extern void dmasound_setup (char *str, int *ints);
 243 #endif
 244 #ifdef CONFIG_ATARI_SCSI
 245 extern void atari_scsi_setup (char *str, int *ints);
 246 #endif
 247 extern void stram_swap_setup (char *str, int *ints);
 248 extern void wd33c93_setup (char *str, int *ints);
 249 extern void gvp11_setup (char *str, int *ints);
 250 extern void ncr53c7xx_setup (char *str, int *ints);
 251 #ifdef CONFIG_MAC_SCSI
 252 extern void mac_scsi_setup (char *str, int *ints);
 253 #endif
 254
 255 #ifdef CONFIG_CYCLADES
 256 extern void cy_setup(char *str, int *ints);
 257 #endif
 258 #ifdef CONFIG_DIGI
 259 extern void pcxx_setup(char *str, int *ints);
 260 #endif
 261 #ifdef CONFIG_RISCOM8
 262 extern void riscom8_setup(char *str, int *ints);
 263 #endif
 264 #ifdef CONFIG_SPECIALIX
 265 extern void specialix_setup(char *str, int *ints);
 266 #endif
 267 #ifdef CONFIG_DMASCC
 268 extern void dmascc_setup(char *str, int *ints);
 269 #endif
 270 #ifdef CONFIG_BAYCOM_PAR
 271 extern void baycom_par_setup(char *str, int *ints);
 272 #endif
 273 #ifdef CONFIG_BAYCOM_SER_FDX
 274 extern void baycom_ser_fdx_setup(char *str, int *ints);
 275 #endif
 276 #ifdef CONFIG_BAYCOM_SER_HDX
 277 extern void baycom_ser_hdx_setup(char *str, int *ints);
 278 #endif
 279 #ifdef CONFIG_SOUNDMODEM
 280 extern void sm_setup(char *str, int *ints);
 281 #endif
 282 #ifdef CONFIG_PMAC_CONSOLE
 283 extern void pmac_cons_setup(char *str, int *ints);
 284 extern void pmac_vmode_setup(char *str, int *ints);
 285 #endif
 286 #ifdef CONFIG_WDT
 287 extern void wdt_setup(char *str, int *ints);
 288 #endif
 289 #ifdef CONFIG_PARPORT
 290 extern void parport_setup(char *str, int *ints);
 291 #endif
 292 #ifdef CONFIG_PLIP
 293 extern void plip_setup(char *str, int *ints);
 294 #endif
 295 #ifdef CONFIG_HFMODEM
 296 extern void hfmodem_setup(char *str, int *ints);
 297 #endif
 298 #ifdef CONFIG_IP_PNP
 299 extern void ip_auto_config_setup(char *str, int *ints);
 300 #endif
 301 #ifdef CONFIG_ROOT_NFS
 302 extern void nfs_root_setup(char *str, int *ints);
 303 #endif
 304 #ifdef CONFIG_FTAPE
 305 extern void ftape_setup(char *str, int *ints);
 306 #endif
 307
 308 #if defined(CONFIG_SYSVIPC)
 309 extern void ipc_init(void);
 310 #endif
 311 #if defined(CONFIG_QUOTA)
 312 extern void dquot_init_hash(void);
 313 #endif
 314
 315 #ifdef CONFIG_MD_BOOT
 316 extern void md_setup(char *str,int *ints) __init;
 317 #endif
 318
 319 #ifdef __sparc__
 320 extern int serial_console;
 321 #endif
 322
 323 /*
 324  * Boot command-line arguments
 325  */
 326 #define MAX_INIT_ARGS 8
 327 #define MAX_INIT_ENVS 8
 328
 329 extern void time_init(void);
 330
 331 static unsigned long memory_start = 0;
 332 static unsigned long memory_end = 0;
 333
 334 int rows, cols;
 335
 336 #ifdef CONFIG_BLK_DEV_RAM
 337 extern int rd_doload;           /* 1 = load ramdisk, 0 = don't load */
 338 extern int rd_prompt;           /* 1 = prompt for ramdisk, 0 = don't prompt */
 339 extern int rd_size;             /* Size of the ramdisk(s) */
 340 extern int rd_image_start;      /* starting block # of image */
 341 #ifdef CONFIG_BLK_DEV_INITRD
 342 kdev_t real_root_dev;
 343 #endif
 344 #endif
 345
 346 int root_mountflags = MS_RDONLY;
 347 char *execute_command = NULL;
 348
 349 static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
 350 static char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
 351
 352 char *get_options(char *str, int *ints)
 353 {
 354         char *cur = str;
 355         int i=1;
 356
 357         while (cur && isdigit(*cur) && i <= 10) {
 358                 ints[i++] = simple_strtoul(cur,NULL,0);
 359                 if ((cur = strchr(cur,',')) != NULL)
 360                         cur++;
 361         }
 362         ints[0] = i-1;
 363         return(cur);
 364 }
 365
 366 static void __init profile_setup(char *str, int *ints)
 367 {
 368         if (ints[0] > 0)
 369                 prof_shift = (unsigned long) ints[1];
 370         else
 371                 prof_shift = 2;
 372 }
 373
 374
 375 static struct dev_name_struct {
 376         const char *name;
 377         const int num;
 378 } root_dev_names[] __initdata = {
 379 #ifdef CONFIG_ROOT_NFS
 380         { "nfs",     0x00ff },
 381 #endif
 382 #ifdef CONFIG_BLK_DEV_IDE
 383         { "hda",     0x0300 },
 384         { "hdb",     0x0340 },
 385         { "hdc",     0x1600 },
 386         { "hdd",     0x1640 },
 387         { "hde",     0x2100 },
 388         { "hdf",     0x2140 },
 389         { "hdg",     0x2200 },
 390         { "hdh",     0x2240 },
 391 #endif
 392 #ifdef CONFIG_BLK_DEV_SD
 393         { "sda",     0x0800 },
 394         { "sdb",     0x0810 },
 395         { "sdc",     0x0820 },
 396         { "sdd",     0x0830 },
 397         { "sde",     0x0840 },
 398         { "sdf",     0x0850 },
 399         { "sdg",     0x0860 },
 400         { "sdh",     0x0870 },
 401         { "sdi",     0x0880 },
 402         { "sdj",     0x0890 },
 403         { "sdk",     0x08a0 },
 404         { "sdl",     0x08b0 },
 405         { "sdm",     0x08c0 },
 406         { "sdn",     0x08d0 },
 407         { "sdo",     0x08e0 },
 408         { "sdp",     0x08f0 },
 409 #endif
 410 #ifdef CONFIG_ATARI_ACSI
 411         { "ada",     0x1c00 },
 412         { "adb",     0x1c10 },
 413         { "adc",     0x1c20 },
 414         { "add",     0x1c30 },
 415         { "ade",     0x1c40 },
 416 #endif
 417 #ifdef CONFIG_BLK_DEV_FD
 418         { "fd",      0x0200 },
 419 #endif
 420 #ifdef CONFIG_MD_BOOT
 421         { "md",      0x0900 },
 422 #endif
 423 #ifdef CONFIG_BLK_DEV_XD
 424         { "xda",     0x0d00 },
 425         { "xdb",     0x0d40 },
 426 #endif
 427 #ifdef CONFIG_BLK_DEV_RAM
 428         { "ram",     0x0100 },
 429 #endif
 430 #ifdef CONFIG_BLK_DEV_SR
 431         { "scd",     0x0b00 },
 432 #endif
 433 #ifdef CONFIG_MCD
 434         { "mcd",     0x1700 },
 435 #endif
 436 #ifdef CONFIG_CDU535
 437         { "cdu535",  0x1800 },
 438         { "sonycd",  0x1800 },
 439 #endif
 440 #ifdef CONFIG_AZTCD
 441         { "aztcd",   0x1d00 },
 442 #endif
 443 #ifdef CONFIG_CM206
 444         { "cm206cd", 0x2000 },
 445 #endif
 446 #ifdef CONFIG_GSCD
 447         { "gscd",    0x1000 },
 448 #endif
 449 #ifdef CONFIG_SBPCD
 450         { "sbpcd",   0x1900 },
 451 #endif
 452 #ifdef CONFIG_BLK_DEV_PS2
 453         { "eda",     0x2400 },
 454 #endif
 455 #ifdef CONFIG_PARIDE_PD
 456         { "pda",        0x2d00 },
 457         { "pdb",        0x2d10 },
 458         { "pdc",        0x2d20 },
 459         { "pdd",        0x2d30 },
 460 #endif
 461 #ifdef CONFIG_PARIDE_PCD
 462         { "pcd",        0x2e00 },
 463 #endif
 464 #ifdef CONFIG_PARIDE_PF
 465         { "pf",         0x2f00 },
 466 #endif
 467 #if CONFIG_APBLOCK
 468         { "apblock", APBLOCK_MAJOR << 8},
 469 #endif
 470 #if CONFIG_DDV
 471         { "ddv", DDV_MAJOR << 8},
 472 #endif
 473         { NULL, 0 }
 474 };
 475
 476 kdev_t __init name_to_kdev_t(char *line)
 477 {
 478         int base = 0;
 479         if (strncmp(line,"/dev/",5) == 0) {
 480                 struct dev_name_struct *dev = root_dev_names;
 481                 line += 5;
 482                 do {
 483                         int len = strlen(dev->name);
 484                         if (strncmp(line,dev->name,len) == 0) {
 485                                 line += len;
 486                                 base = dev->num;
 487                                 break;
 488                         }
 489                         dev++;
 490                 } while (dev->name);
 491         }
 492         return to_kdev_t(base + simple_strtoul(line,NULL,base?10:16));
 493 }
 494
 495 static void __init root_dev_setup(char *line, int *num)
 496 {
 497         ROOT_DEV = name_to_kdev_t(line);
 498 }
 499
 500 /*
 501  * List of kernel command line parameters. The first table lists parameters
 502  * which are subject to values parsing (leading numbers are converted to
 503  * an array of ints and chopped off the string), the second table contains
 504  * the few exceptions which obey their own syntax rules.
 505  */
 506
 507 struct kernel_param {
 508         const char *str;
 509         void (*setup_func)(char *, int *);
 510 };
 511
 512 static struct kernel_param cooked_params[] __initdata = {
 513 /* FIXME: make PNP just become reserve_setup */
 514 #ifndef CONFIG_KERNEL_PNP_RESOURCE
 515         { "reserve=", reserve_setup },
 516 #else
 517         { "reserve=", pnp_reserve_setup },
 518 #endif
 519         { "profile=", profile_setup },
 520 #ifdef __SMP__
 521         { "nosmp", smp_setup },
 522         { "maxcpus=", smp_setup },
 523 #ifdef __i386__
 524         { "pirq=", ioapic_pirq_setup },
 525 #endif
 526 #endif
 527 #ifdef CONFIG_BLK_DEV_RAM
 528         { "ramdisk_start=", ramdisk_start_setup },
 529         { "load_ramdisk=", load_ramdisk },
 530         { "prompt_ramdisk=", prompt_ramdisk },
 531         { "ramdisk=", ramdisk_size },
 532         { "ramdisk_size=", ramdisk_size },
 533 #ifdef CONFIG_BLK_DEV_INITRD
 534         { "noinitrd", no_initrd },
 535 #endif
 536 #endif
 537 #ifdef CONFIG_FB
 538         { "video=", video_setup },
 539 #endif
 540         { "panic=", panic_setup },
 541         { "console=", console_setup },
 542 #ifdef CONFIG_VT
 543 #ifdef CONFIG_VGA_CONSOLE
 544         { "no-scroll", no_scroll },
 545 #endif
 546         { "kbd-reset", kbd_reset_setup },
 547 #endif
 548 #ifdef CONFIG_BUGi386
 549         { "no-hlt", no_halt },
 550         { "no387", no_387 },
 551         { "reboot=", reboot_setup },
 552 #endif
 553 #ifdef CONFIG_INET
 554         { "ether=", eth_setup },
 555 #endif
 556 #ifdef CONFIG_ARCNET_COM20020
 557         { "com20020=", com20020_setup },
 558 #endif
 559 #ifdef CONFIG_ARCNET_RIM_I
 560         { "arcrimi=", arcrimi_setup },
 561 #endif
 562 #ifdef CONFIG_ARCNET_COM90xxIO
 563         { "com90io=", com90io_setup },
 564 #endif
 565 #ifdef CONFIG_ARCNET_COM90xx
 566         { "com90xx=", com90xx_setup },
 567 #endif
 568 #ifdef CONFIG_DECNET
 569         { "decnet=", decnet_setup },
 570 #endif
 571 #ifdef CONFIG_PRINTER
 572         { "lp=", lp_setup },
 573 #endif
 574 #ifdef CONFIG_JOYSTICK
 575         { "js=", js_setup },
 576 #endif
 577 #ifdef CONFIG_SCSI
 578         { "max_scsi_luns=", scsi_luns_setup },
 579         { "scsi_logging=", scsi_logging_setup },
 580 #endif
 581 #ifdef CONFIG_SCSI_ADVANSYS
 582         { "advansys=", advansys_setup },
 583 #endif
 584 #if defined(CONFIG_BLK_DEV_HD)
 585         { "hd=", hd_setup },
 586 #endif
 587 #ifdef CONFIG_CHR_DEV_ST
 588         { "st=", st_setup },
 589 #endif
 590 #ifdef CONFIG_BUSMOUSE
 591         { "bmouse=", bmouse_setup },
 592 #endif
 593 #ifdef CONFIG_MS_BUSMOUSE
 594         { "msmouse=", msmouse_setup },
 595 #endif
 596 #ifdef CONFIG_SCSI_SEAGATE
 597         { "st0x=", st0x_setup },
 598         { "tmc8xx=", tmc8xx_setup },
 599 #endif
 600 #ifdef CONFIG_SCSI_T128
 601         { "t128=", t128_setup },
 602 #endif
 603 #ifdef CONFIG_SCSI_PAS16
 604         { "pas16=", pas16_setup },
 605 #endif
 606 #ifdef CONFIG_SCSI_GENERIC_NCR5380
 607         { "ncr5380=", generic_NCR5380_setup },
 608         { "ncr53c400=", generic_NCR53C400_setup },
 609         { "ncr53c400a=", generic_NCR53C400A_setup },
 610         { "dtc3181e=", generic_DTC3181E_setup },
 611 #endif
 612 #ifdef CONFIG_SCSI_AHA152X
 613         { "aha152x=", aha152x_setup},
 614 #endif
 615 #ifdef CONFIG_SCSI_AHA1542
 616         { "aha1542=", aha1542_setup},
 617 #endif
 618 #ifdef CONFIG_SCSI_GDTH
 619         { "gdth=", gdth_setup},
 620 #endif
 621 #ifdef CONFIG_SCSI_AIC7XXX
 622         { "aic7xxx=", aic7xxx_setup},
 623 #endif
 624 #ifdef CONFIG_SCSI_BUSLOGIC
 625         { "BusLogic=", BusLogic_Setup},
 626 #endif
 627 #ifdef CONFIG_SCSI_NCR53C8XX
 628         { "ncr53c8xx=", ncr53c8xx_setup},
 629 #endif
 630 #ifdef CONFIG_SCSI_EATA
 631         { "eata=", eata2x_setup},
 632 #endif
 633 #ifdef CONFIG_SCSI_U14_34F
 634         { "u14-34f=", u14_34f_setup},
 635 #endif
 636 #ifdef CONFIG_SCSI_AM53C974
 637         { "AM53C974=", AM53C974_setup},
 638 #endif
 639 #ifdef CONFIG_SCSI_NCR53C406A
 640         { "ncr53c406a=", NCR53c406a_setup},
 641 #endif
 642 #ifdef CONFIG_SCSI_FUTURE_DOMAIN
 643         { "fdomain=", fdomain_setup},
 644 #endif
 645 #ifdef CONFIG_SCSI_IN2000
 646         { "in2000=", in2000_setup},
 647 #endif
 648 #ifdef CONFIG_SCSI_7000FASST
 649         { "wd7000=", wd7000_setup},
 650 #endif
 651 #ifdef CONFIG_SCSI_IBMMCA
 652         { "ibmmcascsi=", ibmmca_scsi_setup },
 653 #endif
 654 #ifdef CONFIG_BLK_DEV_XD
 655         { "xd=", xd_setup },
 656         { "xd_geo=", xd_manual_geo_init },
 657 #endif
 658 #if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
 659         { "floppy=", floppy_setup },
 660 #endif
 661 #ifdef CONFIG_BLK_DEV_PS2
 662         { "ed=", ed_setup },
 663         { "tp720=", tp720_setup },
 664 #endif
 665 #ifdef CONFIG_CDU31A
 666         { "cdu31a=", cdu31a_setup },
 667 #endif CONFIG_CDU31A
 668 #ifdef CONFIG_MCD
 669         { "mcd=", mcd_setup },
 670 #endif CONFIG_MCD
 671 #ifdef CONFIG_MCDX
 672         { "mcdx=", mcdx_setup },
 673 #endif CONFIG_MCDX
 674 #ifdef CONFIG_SBPCD
 675         { "sbpcd=", sbpcd_setup },
 676 #endif CONFIG_SBPCD
 677 #ifdef CONFIG_AZTCD
 678         { "aztcd=", aztcd_setup },
 679 #endif CONFIG_AZTCD
 680 #ifdef CONFIG_CDU535
 681         { "sonycd535=", sonycd535_setup },
 682 #endif CONFIG_CDU535
 683 #ifdef CONFIG_GSCD
 684         { "gscd=", gscd_setup },
 685 #endif CONFIG_GSCD
 686 #ifdef CONFIG_CM206
 687         { "cm206=", cm206_setup },
 688 #endif CONFIG_CM206
 689 #ifdef CONFIG_OPTCD
 690         { "optcd=", optcd_setup },
 691 #endif CONFIG_OPTCD
 692 #ifdef CONFIG_SJCD
 693         { "sjcd=", sjcd_setup },
 694 #endif CONFIG_SJCD
 695 #ifdef CONFIG_ISP16_CDI
 696         { "isp16=", isp16_setup },
 697 #endif CONFIG_ISP16_CDI
 698 #ifdef CONFIG_SOUND_OSS
 699         { "sound=", sound_setup },
 700 #endif
 701 #ifdef CONFIG_ISDN_DRV_ICN
 702         { "icn=", icn_setup },
 703 #endif
 704 #ifdef CONFIG_ISDN_DRV_HISAX
 705        { "hisax=", HiSax_setup },
 706        { "HiSax=", HiSax_setup },
 707 #endif
 708 #ifdef CONFIG_ISDN_DRV_PCBIT
 709         { "pcbit=", pcbit_setup },
 710 #endif
 711 #ifdef CONFIG_ATARIMOUSE
 712         { "atamouse=", atari_mouse_setup },
 713 #endif
 714 #ifdef CONFIG_DMASOUND
 715         { "dmasound=", dmasound_setup },
 716 #endif
 717 #ifdef CONFIG_ATARI_SCSI
 718         { "atascsi=", atari_scsi_setup },
 719 #endif
 720 #ifdef CONFIG_STRAM_SWAP
 721         { "stram_swap=", stram_swap_setup },
 722 #endif
 723 #if defined(CONFIG_A4000T_SCSI) || defined(CONFIG_WARPENGINE_SCSI) \
 724             || defined(CONFIG_A4091_SCSI) || defined(CONFIG_MVME16x_SCSI) \
 725             || defined(CONFIG_BVME6000_SCSI)
 726         { "53c7xx=", ncr53c7xx_setup },
 727 #endif
 728 #if defined(CONFIG_A3000_SCSI) || defined(CONFIG_A2091_SCSI) \
 729             || defined(CONFIG_GVP11_SCSI)
 730         { "wd33c93=", wd33c93_setup },
 731 #endif
 732 #if defined(CONFIG_GVP11_SCSI)
 733         { "gvp11=", gvp11_setup },
 734 #endif
 735 #ifdef CONFIG_MAC_SCSI
 736         { "mac5380=", mac_scsi_setup },
 737 #endif
 738 #ifdef CONFIG_CYCLADES
 739         { "cyclades=", cy_setup },
 740 #endif
 741 #ifdef CONFIG_DIGI
 742         { "digi=", pcxx_setup },
 743 #endif
 744 #ifdef CONFIG_DIGIEPCA
 745         { "digiepca=", epca_setup },
 746 #endif
 747 #ifdef CONFIG_RISCOM8
 748         { "riscom8=", riscom8_setup },
 749 #endif
 750 #ifdef CONFIG_DMASCC
 751         { "dmascc=", dmascc_setup },
 752 #endif
 753 #ifdef CONFIG_SPECIALIX
 754         { "specialix=", specialix_setup },
 755 #endif
 756 #ifdef CONFIG_BAYCOM_PAR
 757         { "baycom_par=", baycom_par_setup },
 758 #endif
 759 #ifdef CONFIG_BAYCOM_SER_FDX
 760         { "baycom_ser_fdx=", baycom_ser_fdx_setup },
 761 #endif
 762 #ifdef CONFIG_BAYCOM_SER_HDX
 763         { "baycom_ser_hdx=", baycom_ser_hdx_setup },
 764 #endif
 765 #ifdef CONFIG_SOUNDMODEM
 766         { "soundmodem=", sm_setup },
 767 #endif
 768 #ifdef CONFIG_WDT
 769         { "wdt=", wdt_setup },
 770 #endif
 771 #ifdef CONFIG_PARPORT
 772         { "parport=", parport_setup },
 773 #endif
 774 #ifdef CONFIG_PLIP
 775         { "plip=", plip_setup },
 776 #endif
 777 #ifdef CONFIG_HFMODEM
 778         { "hfmodem=", hfmodem_setup },
 779 #endif
 780 #ifdef CONFIG_FTAPE
 781         { "ftape=", ftape_setup},
 782 #endif
 783 #ifdef CONFIG_MD_BOOT
 784         { "md=", md_setup},
 785 #endif
 786 #ifdef CONFIG_MACMOUSE
 787         { "adb_buttons=", adb_mouse_setup },
 788 #endif
 789         { 0, 0 }
 790 };
 791
 792 static struct kernel_param raw_params[] __initdata = {
 793         { "root=", root_dev_setup },
 794 #ifdef CONFIG_ROOT_NFS
 795         { "nfsroot=", nfs_root_setup },
 796         { "nfsaddrs=", ip_auto_config_setup },
 797 #endif
 798 #ifdef CONFIG_IP_PNP
 799         { "ip=", ip_auto_config_setup },
 800 #endif
 801 #ifdef CONFIG_PCI
 802         { "pci=", pci_setup },
 803 #endif
 804 #ifdef CONFIG_PARIDE_PD
 805         { "pd.", pd_setup },
 806 #endif
 807 #ifdef CONFIG_PARIDE_PCD
 808         { "pcd.", pcd_setup },
 809 #endif
 810 #ifdef CONFIG_PARIDE_PF
 811         { "pf.", pf_setup },
 812 #endif
 813 #ifdef CONFIG_PARIDE_PT
 814         { "pt.", pt_setup },
 815 #endif
 816 #ifdef CONFIG_PARIDE_PG
 817         { "pg.", pg_setup },
 818 #endif
 819         { 0, 0 }
 820 };
 821
 822 #ifdef CONFIG_BLK_DEV_RAM
 823 static void __init ramdisk_start_setup(char *str, int *ints)
 824 {
 825    if (ints[0] > 0 && ints[1] >= 0)
 826       rd_image_start = ints[1];
 827 }
 828
 829 static void __init load_ramdisk(char *str, int *ints)
 830 {
 831    if (ints[0] > 0 && ints[1] >= 0)
 832       rd_doload = ints[1] & 1;
 833 }
 834
 835 static void __init prompt_ramdisk(char *str, int *ints)
 836 {
 837    if (ints[0] > 0 && ints[1] >= 0)
 838       rd_prompt = ints[1] & 1;
 839 }
 840
 841 static void __init ramdisk_size(char *str, int *ints)
 842 {
 843         if (ints[0] > 0 && ints[1] >= 0)
 844                 rd_size = ints[1];
 845 }
 846 #endif
 847
 848 static int __init checksetup(char *line)
 849 {
 850         int i, ints[11];
 851
 852 #ifdef CONFIG_BLK_DEV_IDE
 853         /* ide driver needs the basic string, rather than pre-processed values */
 854         if (!strncmp(line,"ide",3) || (!strncmp(line,"hd",2) && line[2] != '=')) {
 855                 ide_setup(line);
 856                 return 1;
 857         }
 858 #endif
 859         for (i=0; raw_params[i].str; i++) {
 860                 int n = strlen(raw_params[i].str);
 861                 if (!strncmp(line,raw_params[i].str,n)) {
 862                         raw_params[i].setup_func(line+n, NULL);
 863                         return 1;
 864                 }
 865         }
 866         for (i=0; cooked_params[i].str; i++) {
 867                 int n = strlen(cooked_params[i].str);
 868                 if (!strncmp(line,cooked_params[i].str,n)) {
 869                         cooked_params[i].setup_func(get_options(line+n, ints), ints);
 870                         return 1;
 871                 }
 872         }
 873         return 0;
 874 }
 875
 876 /* this should be approx 2 Bo*oMips to start (note initial shift), and will
 877    still work even if initially too large, it will just take slightly longer */
 878 unsigned long loops_per_sec = (1<<12);
 879
 880 /* This is the number of bits of precision for the loops_per_second.  Each
 881    bit takes on average 1.5/HZ seconds.  This (like the original) is a little
 882    better than 1% */
 883 #define LPS_PREC 8
 884
 885 void __init calibrate_delay(void)
 886 {
 887         unsigned long ticks, loopbit;
 888         int lps_precision = LPS_PREC;
 889
 890         loops_per_sec = (1<<12);
 891
 892         printk("Calibrating delay loop... ");
 893         while (loops_per_sec <<= 1) {
 894                 /* wait for "start of" clock tick */
 895                 ticks = jiffies;
 896                 while (ticks == jiffies)
 897                         /* nothing */;
 898                 /* Go .. */
 899                 ticks = jiffies;
 900                 __delay(loops_per_sec);
 901                 ticks = jiffies - ticks;
 902                 if (ticks)
 903                         break;
 904                 }
 905
 906 /* Do a binary approximation to get loops_per_second set to equal one clock
 907    (up to lps_precision bits) */
 908         loops_per_sec >>= 1;
 909         loopbit = loops_per_sec;
 910         while ( lps_precision-- && (loopbit >>= 1) ) {
 911                 loops_per_sec |= loopbit;
 912                 ticks = jiffies;
 913                 while (ticks == jiffies);
 914                 ticks = jiffies;
 915                 __delay(loops_per_sec);
 916                 if (jiffies != ticks)   /* longer than 1 tick */
 917                         loops_per_sec &= ~loopbit;
 918         }
 919
 920 /* finally, adjust loops per second in terms of seconds instead of clocks */
 921         loops_per_sec *= HZ;
 922 /* Round the value and print it */
 923         printk("%lu.%02lu BogoMIPS\n",
 924                 (loops_per_sec+2500)/500000,
 925                 ((loops_per_sec+2500)/5000) % 100);
 926 }
 927
 928 /*
 929  * This is a simple kernel command line parsing function: it parses
 930  * the command line, and fills in the arguments/environment to init
 931  * as appropriate. Any cmd-line option is taken to be an environment
 932  * variable if it contains the character '='.
 933  *
 934  * This routine also checks for options meant for the kernel.
 935  * These options are not given to init - they are for internal kernel use only.
 936  */
 937 static void __init parse_options(char *line)
 938 {
 939         char *next;
 940         int args, envs;
 941
 942         if (!*line)
 943                 return;
 944         args = 0;
 945         envs = 1;       /* TERM is set to 'linux' by default */
 946         next = line;
 947         while ((line = next) != NULL) {
 948                 if ((next = strchr(line,' ')) != NULL)
 949                         *next++ = 0;
 950                 /*
 951                  * check for kernel options first..
 952                  */
 953                 if (!strcmp(line,"ro")) {
 954                         root_mountflags |= MS_RDONLY;
 955                         continue;
 956                 }
 957                 if (!strcmp(line,"rw")) {
 958                         root_mountflags &= ~MS_RDONLY;
 959                         continue;
 960                 }
 961                 if (!strcmp(line,"debug")) {
 962                         console_loglevel = 10;
 963                         continue;
 964                 }
 965                 if (!strncmp(line,"init=",5)) {
 966                         line += 5;
 967                         execute_command = line;
 968                         /* In case LILO is going to boot us with default command line,
 969                          * it prepends "auto" before the whole cmdline which makes
 970                          * the shell think it should execute a script with such name.
 971                          * So we ignore all arguments entered _before_ init=... [MJ]
 972                          */
 973                         args = 0;
 974                         continue;
 975                 }
 976                 if (checksetup(line))
 977                         continue;
 978
 979                 /*
 980                  * Then check if it's an environment variable or
 981                  * an option.
 982                  */
 983                 if (strchr(line,'=')) {
 984                         if (envs >= MAX_INIT_ENVS)
 985                                 break;
 986                         envp_init[++envs] = line;
 987                 } else {
 988                         if (args >= MAX_INIT_ARGS)
 989                                 break;
 990                         argv_init[++args] = line;
 991                 }
 992         }
 993         argv_init[args+1] = NULL;
 994         envp_init[envs+1] = NULL;
 995 }
 996
 997
 998 extern void setup_arch(char **, unsigned long *, unsigned long *);
 999
1000 #ifndef __SMP__
1001
1002 /*
1003  *      Uniprocessor idle thread
1004  */
1005
1006 int cpu_idle(void *unused)
1007 {
1008         for(;;)
1009                 idle();
1010 }
1011
1012 #define smp_init()      do { } while (0)
1013
1014 #else
1015
1016 /*
1017  *      Multiprocessor idle thread is in arch/...
1018  */
1019
1020 extern int cpu_idle(void * unused);
1021
1022 /* Called by boot processor to activate the rest. */
1023 static void __init smp_init(void)
1024 {
1025         /* Get other processors into their bootup holding patterns. */
1026         smp_boot_cpus();
1027         smp_threads_ready=1;
1028         smp_commence();
1029 }
1030
1031 #endif
1032
1033 extern void initialize_secondary(void);
1034
1035 /*
1036  *      Activate the first processor.
1037  */
1038
1039 asmlinkage void __init start_kernel(void)
1040 {
1041         char * command_line;
1042
1043 #ifdef __SMP__
1044         static int boot_cpu = 1;
1045         /* "current" has been set up, we need to load it now */
1046         if (!boot_cpu)
1047                 initialize_secondary();
1048         boot_cpu = 0;
1049 #endif
1050
1051 /*
1052  * Interrupts are still disabled. Do necessary setups, then
1053  * enable them
1054  */
1055         printk(linux_banner);
1056         setup_arch(&command_line, &memory_start, &memory_end);
1057         memory_start = paging_init(memory_start,memory_end);
1058         trap_init();
1059         init_IRQ();
1060         sched_init();
1061         time_init();
1062         parse_options(command_line);
1063
1064         /*
1065          * HACK ALERT! This is early. We're enabling the console before
1066          * we've done PCI setups etc, and console_init() must be aware of
1067          * this. But we do want output early, in case something goes wrong.
1068          */
1069         memory_start = console_init(memory_start,memory_end);
1070 #ifdef CONFIG_MODULES
1071         init_modules();
1072 #endif
1073         if (prof_shift) {
1074                 prof_buffer = (unsigned int *) memory_start;
1075                 /* only text is profiled */
1076                 prof_len = (unsigned long) &_etext - (unsigned long) &_stext;
1077                 prof_len >>= prof_shift;
1078                 memory_start += prof_len * sizeof(unsigned int);
1079                 memset(prof_buffer, 0, prof_len * sizeof(unsigned int));
1080         }
1081
1082         memory_start = kmem_cache_init(memory_start, memory_end);
1083         sti();
1084         calibrate_delay();
1085 #ifdef CONFIG_BLK_DEV_INITRD
1086         if (initrd_start && !initrd_below_start_ok && initrd_start < memory_start) {
1087                 printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
1088                     "disabling it.\n",initrd_start,memory_start);
1089                 initrd_start = 0;
1090         }
1091 #endif
1092         mem_init(memory_start,memory_end);
1093         kmem_cache_sizes_init();
1094 #ifdef CONFIG_PROC_FS
1095         proc_root_init();
1096 #endif
1097         uidcache_init();
1098         filescache_init();
1099         dcache_init();
1100         vma_init();
1101         buffer_init();
1102         signals_init();
1103         inode_init();
1104         file_table_init();
1105 #if defined(CONFIG_SYSVIPC)
1106         ipc_init();
1107 #endif
1108 #if defined(CONFIG_QUOTA)
1109         dquot_init_hash();
1110 #endif
1111         check_bugs();
1112         printk("POSIX conformance testing by UNIFIX\n");
1113
1114         smp_init();
1115
1116         /*
1117          * Ok, the machine is now initialized. None of the devices
1118          * have been touched yet, but the CPU subsystem is up and
1119          * running, and memory management works.
1120          *
1121          * Now we can finally start doing some real work..
1122          */
1123
1124 #if defined(CONFIG_MTRR)        /* Do this after SMP initialization */
1125 /*
1126  * We should probably create some architecture-dependent "fixup after
1127  * everything is up" style function where this would belong better
1128  * than in init/main.c..
1129  */
1130         mtrr_init();
1131 #endif
1132
1133 #ifdef CONFIG_SYSCTL
1134         sysctl_init();
1135 #endif
1136 #ifdef CONFIG_DIO
1137         dio_init();
1138 #endif
1139
1140         /*
1141          * Ok, at this point all CPU's should be initialized, so
1142          * we can start looking into devices..
1143          */
1144 #ifdef CONFIG_PCI
1145         pci_init();
1146 #endif
1147 #ifdef CONFIG_SBUS
1148         sbus_init();
1149 #endif
1150 #if defined(CONFIG_PMAC) || defined(CONFIG_CHRP)
1151         powermac_init();
1152 #endif
1153 #ifdef CONFIG_MCA
1154         mca_init();
1155 #endif
1156 #ifdef CONFIG_ARCH_ACORN
1157         ecard_init();
1158 #endif
1159
1160         /*
1161          *      We count on the initial thread going ok
1162          *      Like idlers init is an unlocked kernel thread, which will
1163          *      make syscalls (and thus be locked).
1164          */
1165         kernel_thread(init, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1166 /*
1167  * task[0] is meant to be used as an "idle" task: it may not sleep, but
1168  * it might do some general things like count free pages or it could be
1169  * used to implement a reasonable LRU algorithm for the paging routines:
1170  * anything that can be useful, but shouldn't take time from the real
1171  * processes.
1172  *
1173  * Right now task[0] just does an infinite idle loop.
1174  */
1175         cpu_idle(NULL);
1176 }
1177
1178 #ifdef CONFIG_BLK_DEV_INITRD
1179 static int do_linuxrc(void * shell)
1180 {
1181         static char *argv[] = { "linuxrc", NULL, };
1182
1183         close(0);close(1);close(2);
1184         setsid();
1185         (void) open("/dev/console",O_RDWR,0);
1186         (void) dup(0);
1187         (void) dup(0);
1188         return execve(shell, argv, envp_init);
1189 }
1190
1191 static void __init no_initrd(char *s,int *ints)
1192 {
1193         mount_initrd = 0;
1194 }
1195 #endif
1196
1197 static void __init do_basic_setup(void)
1198 {
1199 #ifdef CONFIG_BLK_DEV_INITRD
1200         int real_root_mountflags;
1201 #endif
1202
1203         /* Networking initialization needs a process context */
1204         sock_init();
1205
1206         /* Launch bdflush from here, instead of the old syscall way. */
1207         kernel_thread(bdflush, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1208         /* Start the background pageout daemon. */
1209         kswapd_setup();
1210         kernel_thread(kswapd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1211
1212 #if CONFIG_AP1000
1213         /* Start the async paging daemon. */
1214         {
1215           extern int asyncd(void *);
1216           kernel_thread(asyncd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1217         }
1218 #endif
1219
1220 #ifdef CONFIG_BLK_DEV_INITRD
1221         real_root_dev = ROOT_DEV;
1222         real_root_mountflags = root_mountflags;
1223         if (initrd_start && mount_initrd) root_mountflags &= ~MS_RDONLY;
1224         else mount_initrd =0;
1225 #endif
1226
1227         /* Set up devices .. */
1228         device_setup();
1229
1230         /* .. executable formats .. */
1231         binfmt_setup();
1232
1233         /* .. filesystems .. */
1234         filesystem_setup();
1235
1236         /* Mount the root filesystem.. */
1237         mount_root();
1238
1239 #ifdef CONFIG_UMSDOS_FS
1240         {
1241                 /*
1242                         When mounting a umsdos fs as root, we detect
1243                         the pseudo_root (/linux) and initialise it here.
1244                         pseudo_root is defined in fs/umsdos/inode.c
1245                 */
1246                 extern struct inode *pseudo_root;
1247                 if (pseudo_root != NULL){
1248                         current->fs->root = pseudo_root;
1249                         current->fs->pwd  = pseudo_root;
1250                 }
1251         }
1252 #endif
1253
1254 #ifdef CONFIG_BLK_DEV_INITRD
1255         root_mountflags = real_root_mountflags;
1256         if (mount_initrd && ROOT_DEV != real_root_dev
1257             && MAJOR(ROOT_DEV) == RAMDISK_MAJOR && MINOR(ROOT_DEV) == 0) {
1258                 int error;
1259                 int i, pid;
1260
1261                 pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
1262                 if (pid>0)
1263                         while (pid != wait(&i));
1264                 if (MAJOR(real_root_dev) != RAMDISK_MAJOR
1265                      || MINOR(real_root_dev) != 0) {
1266                         error = change_root(real_root_dev,"/initrd");
1267                         if (error)
1268                                 printk(KERN_ERR "Change root to /initrd: "
1269                                     "error %d\n",error);
1270                 }
1271         }
1272 #endif
1273 }
1274
1275 static int init(void * unused)
1276 {
1277         do_basic_setup();
1278
1279         /*
1280          * Ok, we have completed the initial bootup, and
1281          * we're essentially up and running. Get rid of the
1282          * initmem segments and start the user-mode stuff..
1283          */
1284         free_initmem();
1285
1286         if (open("/dev/console", O_RDWR, 0) < 0)
1287                 printk("Warning: unable to open an initial console.\n");
1288
1289         (void) dup(0);
1290         (void) dup(0);
1291
1292         /*
1293          * We try each of these until one succeeds.
1294          *
1295          * The Bourne shell can be used instead of init if we are
1296          * trying to recover a really broken machine.
1297          */
1298
1299         if (execute_command)
1300                 execve(execute_command,argv_init,envp_init);
1301         execve("/sbin/init",argv_init,envp_init);
1302         execve("/etc/init",argv_init,envp_init);
1303         execve("/bin/init",argv_init,envp_init);
1304         execve("/bin/sh",argv_init,envp_init);
1305         panic("No init found.  Try passing init= option to kernel.");
1306 }