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 #include <linux/smp_lock.h>
  36
  37 #include <asm/system.h>
  38 #include <asm/io.h>
  39 #include <asm/bugs.h>
  40
  41 #include <stdarg.h>
  42
  43 #ifdef CONFIG_PCI
  44 #include <linux/pci.h>
  45 #endif
  46
  47 #ifdef CONFIG_DIO
  48 #include <linux/dio.h>
  49 #endif
  50
  51 #ifdef CONFIG_ZORRO
  52 #include <linux/zorro.h>
  53 #endif
  54
  55 #ifdef CONFIG_MTRR
  56 #  include <asm/mtrr.h>
  57 #endif
  58
  59 /*
  60  * Versions of gcc older than that listed below may actually compile
  61  * and link okay, but the end product can have subtle run time bugs.
  62  * To avoid associated bogus bug reports, we flatly refuse to compile
  63  * with a gcc that is known to be too old from the very beginning.
  64  */
  65 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
  66 #error sorry, your GCC is too old. It builds incorrect kernels.
  67 #endif
  68
  69 extern char _stext, _etext;
  70 extern char *linux_banner;
  71
  72 extern int console_loglevel;
  73
  74 static int init(void *);
  75 extern int bdflush(void *);
  76 extern int kswapd(void *);
  77 extern void kswapd_setup(void);
  78
  79 extern void init_IRQ(void);
  80 extern void init_modules(void);
  81 extern long console_init(long, long);
  82 extern void sock_init(void);
  83 extern void uidcache_init(void);
  84 extern void mca_init(void);
  85 extern void sbus_init(void);
  86 extern void powermac_init(void);
  87 extern void sysctl_init(void);
  88 extern void filescache_init(void);
  89 extern void signals_init(void);
  90
  91 extern void device_setup(void);
  92 extern void binfmt_setup(void);
  93 extern void free_initmem(void);
  94 extern void filesystem_setup(void);
  95
  96 #ifdef CONFIG_ARCH_ACORN
  97 extern void ecard_init(void);
  98 #endif
  99
 100 extern void smp_setup(char *str, int *ints);
 101 #ifdef __i386__
 102 extern void ioapic_pirq_setup(char *str, int *ints);
 103 #endif
 104 extern void no_scroll(char *str, int *ints);
 105 extern void kbd_reset_setup(char *str, int *ints);
 106 extern void panic_setup(char *str, int *ints);
 107 extern void bmouse_setup(char *str, int *ints);
 108 extern void msmouse_setup(char *str, int *ints);
 109 extern void console_setup(char *str, int *ints);
 110 #ifdef CONFIG_PRINTER
 111 extern void lp_setup(char *str, int *ints);
 112 #endif
 113 #ifdef CONFIG_JOY_AMIGA
 114 extern void js_am_setup(char *str, int *ints);
 115 #endif
 116 #ifdef CONFIG_JOY_ANALOG
 117 extern void js_an_setup(char *str, int *ints);
 118 #endif
 119 #ifdef CONFIG_JOY_ASSASIN
 120 extern void js_as_setup(char *str, int *ints);
 121 #endif
 122 #ifdef CONFIG_JOY_CONSOLE
 123 extern void js_console_setup(char *str, int *ints);
 124 #endif
 125 #ifdef CONFIG_JOY_DB9
 126 extern void js_db9_setup(char *str, int *ints);
 127 #endif
 128 #ifdef CONFIG_JOY_TURBOGRAFX
 129 extern void js_tg_setup(char *str, int *ints);
 130 #endif
 131 #ifdef CONFIG_JOY_LIGHTNING
 132 extern void js_l4_setup(char *str, int *ints);
 133 #endif
 134 extern void eth_setup(char *str, int *ints);
 135 #ifdef CONFIG_ARCNET_COM20020
 136 extern void com20020_setup(char *str, int *ints);
 137 #endif
 138 #ifdef CONFIG_ARCNET_RIM_I
 139 extern void arcrimi_setup(char *str, int *ints);
 140 #endif
 141 #ifdef CONFIG_ARCNET_COM90xxIO
 142 extern void com90io_setup(char *str, int *ints);
 143 #endif
 144 #ifdef CONFIG_ARCNET_COM90xx
 145 extern void com90xx_setup(char *str, int *ints);
 146 #endif
 147 #ifdef CONFIG_DECNET
 148 extern void decnet_setup(char *str, int *ints);
 149 #endif
 150 #ifdef CONFIG_BLK_DEV_XD
 151 extern void xd_setup(char *str, int *ints);
 152 extern void xd_manual_geo_init(char *str, int *ints);
 153 #endif
 154 #ifdef CONFIG_BLK_DEV_IDE
 155 extern void ide_setup(char *);
 156 #endif
 157 #ifdef CONFIG_PARIDE_PD
 158 extern void pd_setup(char *str, int *ints);
 159 #endif
 160 #ifdef CONFIG_PARIDE_PF
 161 extern void pf_setup(char *str, int *ints);
 162 #endif
 163 #ifdef CONFIG_PARIDE_PT
 164 extern void pt_setup(char *str, int *ints);
 165 #endif
 166 #ifdef CONFIG_PARIDE_PG
 167 extern void pg_setup(char *str, int *ints);
 168 #endif
 169 #ifdef CONFIG_PARIDE_PCD
 170 extern void pcd_setup(char *str, int *ints);
 171 #endif
 172 extern void floppy_setup(char *str, int *ints);
 173 extern void st_setup(char *str, int *ints);
 174 extern void st0x_setup(char *str, int *ints);
 175 extern void advansys_setup(char *str, int *ints);
 176 extern void tmc8xx_setup(char *str, int *ints);
 177 extern void t128_setup(char *str, int *ints);
 178 extern void pas16_setup(char *str, int *ints);
 179 extern void generic_NCR5380_setup(char *str, int *intr);
 180 extern void generic_NCR53C400_setup(char *str, int *intr);
 181 extern void generic_NCR53C400A_setup(char *str, int *intr);
 182 extern void generic_DTC3181E_setup(char *str, int *intr);
 183 extern void aha152x_setup(char *str, int *ints);
 184 extern void aha1542_setup(char *str, int *ints);
 185 extern void gdth_setup(char *str, int *ints);
 186 extern void aic7xxx_setup(char *str, int *ints);
 187 extern void AM53C974_setup(char *str, int *ints);
 188 extern void BusLogic_Setup(char *str, int *ints);
 189 extern void ncr53c8xx_setup(char *str, int *ints);
 190 extern void eata2x_setup(char *str, int *ints);
 191 extern void u14_34f_setup(char *str, int *ints);
 192 extern void fdomain_setup(char *str, int *ints);
 193 extern void ibmmca_scsi_setup(char *str, int *ints);
 194 extern void in2000_setup(char *str, int *ints);
 195 extern void NCR53c406a_setup(char *str, int *ints);
 196 extern void wd7000_setup(char *str, int *ints);
 197 extern void dc390_setup(char* str, int *ints);
 198 extern void scsi_luns_setup(char *str, int *ints);
 199 extern void scsi_logging_setup(char *str, int *ints);
 200 extern void sound_setup(char *str, int *ints);
 201 extern void reboot_setup(char *str, int *ints);
 202 extern void video_setup(char *str, int *ints);
 203 #ifdef CONFIG_CDU31A
 204 extern void cdu31a_setup(char *str, int *ints);
 205 #endif CONFIG_CDU31A
 206 #ifdef CONFIG_BLK_DEV_PS2
 207 extern void ed_setup(char *str, int *ints);
 208 extern void tp720_setup(char *str, int *ints);
 209 #endif CONFIG_BLK_DEV_PS2
 210 #ifdef CONFIG_MCD
 211 extern void mcd_setup(char *str, int *ints);
 212 #endif CONFIG_MCD
 213 #ifdef CONFIG_MCDX
 214 extern void mcdx_setup(char *str, int *ints);
 215 #endif CONFIG_MCDX
 216 #ifdef CONFIG_SBPCD
 217 extern void sbpcd_setup(char *str, int *ints);
 218 #endif CONFIG_SBPCD
 219 #ifdef CONFIG_AZTCD
 220 extern void aztcd_setup(char *str, int *ints);
 221 #endif CONFIG_AZTCD
 222 #ifdef CONFIG_CDU535
 223 extern void sonycd535_setup(char *str, int *ints);
 224 #endif CONFIG_CDU535
 225 #ifdef CONFIG_GSCD
 226 extern void gscd_setup(char *str, int *ints);
 227 #endif CONFIG_GSCD
 228 #ifdef CONFIG_CM206
 229 extern void cm206_setup(char *str, int *ints);
 230 #endif CONFIG_CM206
 231 #ifdef CONFIG_OPTCD
 232 extern void optcd_setup(char *str, int *ints);
 233 #endif CONFIG_OPTCD
 234 #ifdef CONFIG_SJCD
 235 extern void sjcd_setup(char *str, int *ints);
 236 #endif CONFIG_SJCD
 237 #ifdef CONFIG_ISP16_CDI
 238 extern void isp16_setup(char *str, int *ints);
 239 #endif CONFIG_ISP16_CDI
 240 #ifdef CONFIG_BLK_DEV_RAM
 241 static void ramdisk_start_setup(char *str, int *ints);
 242 static void load_ramdisk(char *str, int *ints);
 243 static void prompt_ramdisk(char *str, int *ints);
 244 static void ramdisk_size(char *str, int *ints);
 245 #ifdef CONFIG_BLK_DEV_INITRD
 246 static void no_initrd(char *s,int *ints);
 247 #endif
 248 #endif CONFIG_BLK_DEV_RAM
 249 #ifdef CONFIG_ISDN_DRV_ICN
 250 extern void icn_setup(char *str, int *ints);
 251 #endif
 252 #ifdef CONFIG_ISDN_DRV_HISAX
 253 extern void HiSax_setup(char *str, int *ints);
 254 #endif
 255 #ifdef CONFIG_DIGIEPCA
 256 extern void epca_setup(char *str, int *ints);
 257 #endif
 258 #ifdef CONFIG_ISDN_DRV_PCBIT
 259 extern void pcbit_setup(char *str, int *ints);
 260 #endif
 261
 262 #ifdef CONFIG_ATARIMOUSE
 263 extern void atari_mouse_setup (char *str, int *ints);
 264 #endif
 265 #ifdef CONFIG_DMASOUND
 266 extern void dmasound_setup (char *str, int *ints);
 267 #endif
 268 #ifdef CONFIG_ATARI_SCSI
 269 extern void atari_scsi_setup (char *str, int *ints);
 270 #endif
 271 extern void stram_swap_setup (char *str, int *ints);
 272 extern void wd33c93_setup (char *str, int *ints);
 273 extern void gvp11_setup (char *str, int *ints);
 274 extern void ncr53c7xx_setup (char *str, int *ints);
 275 #ifdef CONFIG_MAC_SCSI
 276 extern void mac_scsi_setup (char *str, int *ints);
 277 #endif
 278
 279 #ifdef CONFIG_CYCLADES
 280 extern void cy_setup(char *str, int *ints);
 281 #endif
 282 #ifdef CONFIG_DIGI
 283 extern void pcxx_setup(char *str, int *ints);
 284 #endif
 285 #ifdef CONFIG_RISCOM8
 286 extern void riscom8_setup(char *str, int *ints);
 287 #endif
 288 #ifdef CONFIG_SPECIALIX
 289 extern void specialix_setup(char *str, int *ints);
 290 #endif
 291 #ifdef CONFIG_DMASCC
 292 extern void dmascc_setup(char *str, int *ints);
 293 #endif
 294 #ifdef CONFIG_BAYCOM_PAR
 295 extern void baycom_par_setup(char *str, int *ints);
 296 #endif
 297 #ifdef CONFIG_BAYCOM_SER_FDX
 298 extern void baycom_ser_fdx_setup(char *str, int *ints);
 299 #endif
 300 #ifdef CONFIG_BAYCOM_SER_HDX
 301 extern void baycom_ser_hdx_setup(char *str, int *ints);
 302 #endif
 303 #ifdef CONFIG_SOUNDMODEM
 304 extern void sm_setup(char *str, int *ints);
 305 #endif
 306 #ifdef CONFIG_ADBMOUSE
 307 extern void adb_mouse_setup(char *str, int *ints);
 308 #endif
 309 #ifdef CONFIG_WDT
 310 extern void wdt_setup(char *str, int *ints);
 311 #endif
 312 #ifdef CONFIG_PARPORT
 313 extern void parport_setup(char *str, int *ints);
 314 #endif
 315 #ifdef CONFIG_PLIP
 316 extern void plip_setup(char *str, int *ints);
 317 #endif
 318 #ifdef CONFIG_HFMODEM
 319 extern void hfmodem_setup(char *str, int *ints);
 320 #endif
 321 #ifdef CONFIG_IP_PNP
 322 extern void ip_auto_config_setup(char *str, int *ints);
 323 #endif
 324 #ifdef CONFIG_ROOT_NFS
 325 extern void nfs_root_setup(char *str, int *ints);
 326 #endif
 327 #ifdef CONFIG_FTAPE
 328 extern void ftape_setup(char *str, int *ints);
 329 #endif
 330 #ifdef CONFIG_MDA_CONSOLE
 331 extern void mdacon_setup(char *str, int *ints);
 332 #endif
 333
 334 #if defined(CONFIG_SYSVIPC)
 335 extern void ipc_init(void);
 336 #endif
 337 #if defined(CONFIG_QUOTA)
 338 extern void dquot_init_hash(void);
 339 #endif
 340
 341 #ifdef CONFIG_MD_BOOT
 342 extern void md_setup(char *str,int *ints) __init;
 343 #endif
 344
 345 /*
 346  * Boot command-line arguments
 347  */
 348 #define MAX_INIT_ARGS 8
 349 #define MAX_INIT_ENVS 8
 350
 351 extern void time_init(void);
 352
 353 static unsigned long memory_start = 0;
 354 static unsigned long memory_end = 0;
 355
 356 int rows, cols;
 357
 358 #ifdef CONFIG_BLK_DEV_RAM
 359 extern int rd_doload;           /* 1 = load ramdisk, 0 = don't load */
 360 extern int rd_prompt;           /* 1 = prompt for ramdisk, 0 = don't prompt */
 361 extern int rd_size;             /* Size of the ramdisk(s) */
 362 extern int rd_image_start;      /* starting block # of image */
 363 #ifdef CONFIG_BLK_DEV_INITRD
 364 kdev_t real_root_dev;
 365 #endif
 366 #endif
 367
 368 int root_mountflags = MS_RDONLY;
 369 char *execute_command = NULL;
 370
 371 static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
 372 static char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
 373
 374 char *get_options(char *str, int *ints)
 375 {
 376         char *cur = str;
 377         int i=1;
 378
 379         while (cur && isdigit(*cur) && i <= 10) {
 380                 ints[i++] = simple_strtoul(cur,NULL,0);
 381                 if ((cur = strchr(cur,',')) != NULL)
 382                         cur++;
 383         }
 384         ints[0] = i-1;
 385         return(cur);
 386 }
 387
 388 static void __init profile_setup(char *str, int *ints)
 389 {
 390         if (ints[0] > 0)
 391                 prof_shift = (unsigned long) ints[1];
 392         else
 393                 prof_shift = 2;
 394 }
 395
 396
 397 static struct dev_name_struct {
 398         const char *name;
 399         const int num;
 400 } root_dev_names[] __initdata = {
 401 #ifdef CONFIG_ROOT_NFS
 402         { "nfs",     0x00ff },
 403 #endif
 404 #ifdef CONFIG_BLK_DEV_IDE
 405         { "hda",     0x0300 },
 406         { "hdb",     0x0340 },
 407         { "hdc",     0x1600 },
 408         { "hdd",     0x1640 },
 409         { "hde",     0x2100 },
 410         { "hdf",     0x2140 },
 411         { "hdg",     0x2200 },
 412         { "hdh",     0x2240 },
 413         { "hdi",     0x3800 },
 414         { "hdj",     0x3840 },
 415         { "hdk",     0x3900 },
 416         { "hdl",     0x3940 },
 417 #endif
 418 #ifdef CONFIG_BLK_DEV_SD
 419         { "sda",     0x0800 },
 420         { "sdb",     0x0810 },
 421         { "sdc",     0x0820 },
 422         { "sdd",     0x0830 },
 423         { "sde",     0x0840 },
 424         { "sdf",     0x0850 },
 425         { "sdg",     0x0860 },
 426         { "sdh",     0x0870 },
 427         { "sdi",     0x0880 },
 428         { "sdj",     0x0890 },
 429         { "sdk",     0x08a0 },
 430         { "sdl",     0x08b0 },
 431         { "sdm",     0x08c0 },
 432         { "sdn",     0x08d0 },
 433         { "sdo",     0x08e0 },
 434         { "sdp",     0x08f0 },
 435 #endif
 436 #ifdef CONFIG_ATARI_ACSI
 437         { "ada",     0x1c00 },
 438         { "adb",     0x1c10 },
 439         { "adc",     0x1c20 },
 440         { "add",     0x1c30 },
 441         { "ade",     0x1c40 },
 442 #endif
 443 #ifdef CONFIG_BLK_DEV_FD
 444         { "fd",      0x0200 },
 445 #endif
 446 #ifdef CONFIG_MD_BOOT
 447         { "md",      0x0900 },
 448 #endif
 449 #ifdef CONFIG_BLK_DEV_XD
 450         { "xda",     0x0d00 },
 451         { "xdb",     0x0d40 },
 452 #endif
 453 #ifdef CONFIG_BLK_DEV_RAM
 454         { "ram",     0x0100 },
 455 #endif
 456 #ifdef CONFIG_BLK_DEV_SR
 457         { "scd",     0x0b00 },
 458 #endif
 459 #ifdef CONFIG_MCD
 460         { "mcd",     0x1700 },
 461 #endif
 462 #ifdef CONFIG_CDU535
 463         { "cdu535",  0x1800 },
 464         { "sonycd",  0x1800 },
 465 #endif
 466 #ifdef CONFIG_AZTCD
 467         { "aztcd",   0x1d00 },
 468 #endif
 469 #ifdef CONFIG_CM206
 470         { "cm206cd", 0x2000 },
 471 #endif
 472 #ifdef CONFIG_GSCD
 473         { "gscd",    0x1000 },
 474 #endif
 475 #ifdef CONFIG_SBPCD
 476         { "sbpcd",   0x1900 },
 477 #endif
 478 #ifdef CONFIG_BLK_DEV_PS2
 479         { "eda",     0x2400 },
 480         { "edb",     0x2440 },
 481 #endif
 482 #ifdef CONFIG_PARIDE_PD
 483         { "pda",        0x2d00 },
 484         { "pdb",        0x2d10 },
 485         { "pdc",        0x2d20 },
 486         { "pdd",        0x2d30 },
 487 #endif
 488 #ifdef CONFIG_PARIDE_PCD
 489         { "pcd",        0x2e00 },
 490 #endif
 491 #ifdef CONFIG_PARIDE_PF
 492         { "pf",         0x2f00 },
 493 #endif
 494 #if CONFIG_APBLOCK
 495         { "apblock", APBLOCK_MAJOR << 8},
 496 #endif
 497 #if CONFIG_DDV
 498         { "ddv", DDV_MAJOR << 8},
 499 #endif
 500         { NULL, 0 }
 501 };
 502
 503 kdev_t __init name_to_kdev_t(char *line)
 504 {
 505         int base = 0;
 506         if (strncmp(line,"/dev/",5) == 0) {
 507                 struct dev_name_struct *dev = root_dev_names;
 508                 line += 5;
 509                 do {
 510                         int len = strlen(dev->name);
 511                         if (strncmp(line,dev->name,len) == 0) {
 512                                 line += len;
 513                                 base = dev->num;
 514                                 break;
 515                         }
 516                         dev++;
 517                 } while (dev->name);
 518         }
 519         return to_kdev_t(base + simple_strtoul(line,NULL,base?10:16));
 520 }
 521
 522 static void __init root_dev_setup(char *line, int *num)
 523 {
 524         ROOT_DEV = name_to_kdev_t(line);
 525 }
 526
 527 /*
 528  * List of kernel command line parameters. The first table lists parameters
 529  * which are subject to values parsing (leading numbers are converted to
 530  * an array of ints and chopped off the string), the second table contains
 531  * the few exceptions which obey their own syntax rules.
 532  */
 533
 534 struct kernel_param {
 535         const char *str;
 536         void (*setup_func)(char *, int *);
 537 };
 538
 539 static struct kernel_param cooked_params[] __initdata = {
 540 /* FIXME: make PNP just become reserve_setup */
 541 #ifndef CONFIG_KERNEL_PNP_RESOURCE
 542         { "reserve=", reserve_setup },
 543 #else
 544         { "reserve=", pnp_reserve_setup },
 545 #endif
 546         { "profile=", profile_setup },
 547 #ifdef __SMP__
 548         { "nosmp", smp_setup },
 549         { "maxcpus=", smp_setup },
 550 #ifdef __i386__
 551         { "pirq=", ioapic_pirq_setup },
 552 #endif
 553 #endif
 554 #ifdef CONFIG_BLK_DEV_RAM
 555         { "ramdisk_start=", ramdisk_start_setup },
 556         { "load_ramdisk=", load_ramdisk },
 557         { "prompt_ramdisk=", prompt_ramdisk },
 558         { "ramdisk=", ramdisk_size },
 559         { "ramdisk_size=", ramdisk_size },
 560 #ifdef CONFIG_BLK_DEV_INITRD
 561         { "noinitrd", no_initrd },
 562 #endif
 563 #endif
 564 #ifdef CONFIG_FB
 565         { "video=", video_setup },
 566 #endif
 567         { "panic=", panic_setup },
 568         { "console=", console_setup },
 569 #ifdef CONFIG_VGA_CONSOLE
 570         { "no-scroll", no_scroll },
 571 #endif
 572 #ifdef CONFIG_MDA_CONSOLE
 573         { "mdacon=", mdacon_setup },
 574 #endif
 575 #ifdef CONFIG_VT
 576         { "kbd-reset", kbd_reset_setup },
 577 #endif
 578 #ifdef CONFIG_BUGi386
 579         { "no-hlt", no_halt },
 580         { "no387", no_387 },
 581         { "reboot=", reboot_setup },
 582 #endif
 583 #ifdef CONFIG_INET
 584         { "ether=", eth_setup },
 585 #endif
 586 #ifdef CONFIG_ARCNET_COM20020
 587         { "com20020=", com20020_setup },
 588 #endif
 589 #ifdef CONFIG_ARCNET_RIM_I
 590         { "arcrimi=", arcrimi_setup },
 591 #endif
 592 #ifdef CONFIG_ARCNET_COM90xxIO
 593         { "com90io=", com90io_setup },
 594 #endif
 595 #ifdef CONFIG_ARCNET_COM90xx
 596         { "com90xx=", com90xx_setup },
 597 #endif
 598 #ifdef CONFIG_DECNET
 599         { "decnet=", decnet_setup },
 600 #endif
 601 #ifdef CONFIG_PRINTER
 602         { "lp=", lp_setup },
 603 #endif
 604 #ifdef CONFIG_JOY_AMIGA
 605         { "js_am=", js_am_setup },
 606 #endif
 607 #ifdef CONFIG_JOY_ANALOG
 608         { "js_an=", js_an_setup },
 609 #endif
 610 #ifdef CONFIG_JOY_ASSASIN
 611         { "js_as=", js_as_setup },
 612 #endif
 613 #ifdef CONFIG_JOY_CONSOLE
 614         { "js_console=", js_console_setup },
 615         { "js_console2=", js_console_setup },
 616         { "js_console3=", js_console_setup },
 617 #endif
 618 #ifdef CONFIG_JOY_DB9
 619         { "js_db9=", js_db9_setup },
 620         { "js_db9_2=", js_db9_setup },
 621         { "js_db9_3=", js_db9_setup },
 622 #endif
 623 #ifdef CONFIG_JOY_TURBOGRAFX
 624         { "js_tg=", js_tg_setup },
 625         { "js_tg_2=", js_tg_setup },
 626         { "js_tg_3=", js_tg_setup },
 627 #endif
 628 #ifdef CONFIG_SCSI
 629         { "max_scsi_luns=", scsi_luns_setup },
 630         { "scsi_logging=", scsi_logging_setup },
 631 #endif
 632 #ifdef CONFIG_JOY_LIGHTNING
 633         { "js_l4=", js_l4_setup },
 634 #endif
 635 #ifdef CONFIG_SCSI_ADVANSYS
 636         { "advansys=", advansys_setup },
 637 #endif
 638 #if defined(CONFIG_BLK_DEV_HD)
 639         { "hd=", hd_setup },
 640 #endif
 641 #ifdef CONFIG_CHR_DEV_ST
 642         { "st=", st_setup },
 643 #endif
 644 #ifdef CONFIG_BUSMOUSE
 645         { "bmouse=", bmouse_setup },
 646 #endif
 647 #ifdef CONFIG_MS_BUSMOUSE
 648         { "msmouse=", msmouse_setup },
 649 #endif
 650 #ifdef CONFIG_SCSI_SEAGATE
 651         { "st0x=", st0x_setup },
 652         { "tmc8xx=", tmc8xx_setup },
 653 #endif
 654 #ifdef CONFIG_SCSI_T128
 655         { "t128=", t128_setup },
 656 #endif
 657 #ifdef CONFIG_SCSI_PAS16
 658         { "pas16=", pas16_setup },
 659 #endif
 660 #ifdef CONFIG_SCSI_GENERIC_NCR5380
 661         { "ncr5380=", generic_NCR5380_setup },
 662         { "ncr53c400=", generic_NCR53C400_setup },
 663         { "ncr53c400a=", generic_NCR53C400A_setup },
 664         { "dtc3181e=", generic_DTC3181E_setup },
 665 #endif
 666 #ifdef CONFIG_SCSI_AHA152X
 667         { "aha152x=", aha152x_setup},
 668 #endif
 669 #ifdef CONFIG_SCSI_AHA1542
 670         { "aha1542=", aha1542_setup},
 671 #endif
 672 #ifdef CONFIG_SCSI_GDTH
 673         { "gdth=", gdth_setup},
 674 #endif
 675 #ifdef CONFIG_SCSI_AIC7XXX
 676         { "aic7xxx=", aic7xxx_setup},
 677 #endif
 678 #ifdef CONFIG_SCSI_BUSLOGIC
 679         { "BusLogic=", BusLogic_Setup},
 680 #endif
 681 #ifdef CONFIG_SCSI_NCR53C8XX
 682         { "ncr53c8xx=", ncr53c8xx_setup},
 683 #endif
 684 #ifdef CONFIG_SCSI_EATA
 685         { "eata=", eata2x_setup},
 686 #endif
 687 #ifdef CONFIG_SCSI_U14_34F
 688         { "u14-34f=", u14_34f_setup},
 689 #endif
 690 #ifdef CONFIG_SCSI_AM53C974
 691         { "AM53C974=", AM53C974_setup},
 692 #endif
 693 #ifdef CONFIG_SCSI_NCR53C406A
 694         { "ncr53c406a=", NCR53c406a_setup},
 695 #endif
 696 #ifdef CONFIG_SCSI_FUTURE_DOMAIN
 697         { "fdomain=", fdomain_setup},
 698 #endif
 699 #ifdef CONFIG_SCSI_IN2000
 700         { "in2000=", in2000_setup},
 701 #endif
 702 #ifdef CONFIG_SCSI_7000FASST
 703         { "wd7000=", wd7000_setup},
 704 #endif
 705 #ifdef CONFIG_SCSI_IBMMCA
 706         { "ibmmcascsi=", ibmmca_scsi_setup },
 707 #endif
 708 #if defined(CONFIG_SCSI_DC390T) && ! defined(CONFIG_SCSI_DC390T_NOGENSUPP)
 709         { "tmscsim=", dc390_setup },
 710 #endif
 711 #ifdef CONFIG_BLK_DEV_XD
 712         { "xd=", xd_setup },
 713         { "xd_geo=", xd_manual_geo_init },
 714 #endif
 715 #if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
 716         { "floppy=", floppy_setup },
 717 #endif
 718 #ifdef CONFIG_BLK_DEV_PS2
 719         { "eda=", ed_setup },
 720         { "edb=", ed_setup },
 721         { "tp720=", tp720_setup },
 722 #endif
 723 #ifdef CONFIG_CDU31A
 724         { "cdu31a=", cdu31a_setup },
 725 #endif CONFIG_CDU31A
 726 #ifdef CONFIG_MCD
 727         { "mcd=", mcd_setup },
 728 #endif CONFIG_MCD
 729 #ifdef CONFIG_MCDX
 730         { "mcdx=", mcdx_setup },
 731 #endif CONFIG_MCDX
 732 #ifdef CONFIG_SBPCD
 733         { "sbpcd=", sbpcd_setup },
 734 #endif CONFIG_SBPCD
 735 #ifdef CONFIG_AZTCD
 736         { "aztcd=", aztcd_setup },
 737 #endif CONFIG_AZTCD
 738 #ifdef CONFIG_CDU535
 739         { "sonycd535=", sonycd535_setup },
 740 #endif CONFIG_CDU535
 741 #ifdef CONFIG_GSCD
 742         { "gscd=", gscd_setup },
 743 #endif CONFIG_GSCD
 744 #ifdef CONFIG_CM206
 745         { "cm206=", cm206_setup },
 746 #endif CONFIG_CM206
 747 #ifdef CONFIG_OPTCD
 748         { "optcd=", optcd_setup },
 749 #endif CONFIG_OPTCD
 750 #ifdef CONFIG_SJCD
 751         { "sjcd=", sjcd_setup },
 752 #endif CONFIG_SJCD
 753 #ifdef CONFIG_ISP16_CDI
 754         { "isp16=", isp16_setup },
 755 #endif CONFIG_ISP16_CDI
 756 #ifdef CONFIG_SOUND_OSS
 757         { "sound=", sound_setup },
 758 #endif
 759 #ifdef CONFIG_ISDN_DRV_ICN
 760         { "icn=", icn_setup },
 761 #endif
 762 #ifdef CONFIG_ISDN_DRV_HISAX
 763        { "hisax=", HiSax_setup },
 764        { "HiSax=", HiSax_setup },
 765 #endif
 766 #ifdef CONFIG_ISDN_DRV_PCBIT
 767         { "pcbit=", pcbit_setup },
 768 #endif
 769 #ifdef CONFIG_ATARIMOUSE
 770         { "atamouse=", atari_mouse_setup },
 771 #endif
 772 #ifdef CONFIG_DMASOUND
 773         { "dmasound=", dmasound_setup },
 774 #endif
 775 #ifdef CONFIG_ATARI_SCSI
 776         { "atascsi=", atari_scsi_setup },
 777 #endif
 778 #ifdef CONFIG_STRAM_SWAP
 779         { "stram_swap=", stram_swap_setup },
 780 #endif
 781 #if defined(CONFIG_A4000T_SCSI) || defined(CONFIG_WARPENGINE_SCSI) \
 782             || defined(CONFIG_A4091_SCSI) || defined(CONFIG_MVME16x_SCSI) \
 783             || defined(CONFIG_BVME6000_SCSI)
 784         { "53c7xx=", ncr53c7xx_setup },
 785 #endif
 786 #if defined(CONFIG_A3000_SCSI) || defined(CONFIG_A2091_SCSI) \
 787             || defined(CONFIG_GVP11_SCSI)
 788         { "wd33c93=", wd33c93_setup },
 789 #endif
 790 #if defined(CONFIG_GVP11_SCSI)
 791         { "gvp11=", gvp11_setup },
 792 #endif
 793 #ifdef CONFIG_MAC_SCSI
 794         { "mac5380=", mac_scsi_setup },
 795 #endif
 796 #ifdef CONFIG_CYCLADES
 797         { "cyclades=", cy_setup },
 798 #endif
 799 #ifdef CONFIG_DIGI
 800         { "digi=", pcxx_setup },
 801 #endif
 802 #ifdef CONFIG_DIGIEPCA
 803         { "digiepca=", epca_setup },
 804 #endif
 805 #ifdef CONFIG_RISCOM8
 806         { "riscom8=", riscom8_setup },
 807 #endif
 808 #ifdef CONFIG_DMASCC
 809         { "dmascc=", dmascc_setup },
 810 #endif
 811 #ifdef CONFIG_SPECIALIX
 812         { "specialix=", specialix_setup },
 813 #endif
 814 #ifdef CONFIG_BAYCOM_PAR
 815         { "baycom_par=", baycom_par_setup },
 816 #endif
 817 #ifdef CONFIG_BAYCOM_SER_FDX
 818         { "baycom_ser_fdx=", baycom_ser_fdx_setup },
 819 #endif
 820 #ifdef CONFIG_BAYCOM_SER_HDX
 821         { "baycom_ser_hdx=", baycom_ser_hdx_setup },
 822 #endif
 823 #ifdef CONFIG_SOUNDMODEM
 824         { "soundmodem=", sm_setup },
 825 #endif
 826 #ifdef CONFIG_WDT
 827         { "wdt=", wdt_setup },
 828 #endif
 829 #ifdef CONFIG_PARPORT
 830         { "parport=", parport_setup },
 831 #endif
 832 #ifdef CONFIG_PLIP
 833         { "plip=", plip_setup },
 834 #endif
 835 #ifdef CONFIG_HFMODEM
 836         { "hfmodem=", hfmodem_setup },
 837 #endif
 838 #ifdef CONFIG_FTAPE
 839         { "ftape=", ftape_setup},
 840 #endif
 841 #ifdef CONFIG_MD_BOOT
 842         { "md=", md_setup},
 843 #endif
 844 #ifdef CONFIG_MACMOUSE
 845         { "adb_buttons=", adb_mouse_setup },
 846 #endif
 847         { 0, 0 }
 848 };
 849
 850 static struct kernel_param raw_params[] __initdata = {
 851         { "root=", root_dev_setup },
 852 #ifdef CONFIG_ROOT_NFS
 853         { "nfsroot=", nfs_root_setup },
 854         { "nfsaddrs=", ip_auto_config_setup },
 855 #endif
 856 #ifdef CONFIG_IP_PNP
 857         { "ip=", ip_auto_config_setup },
 858 #endif
 859 #ifdef CONFIG_PCI
 860         { "pci=", pci_setup },
 861 #endif
 862 #ifdef CONFIG_PARIDE_PD
 863         { "pd.", pd_setup },
 864 #endif
 865 #ifdef CONFIG_PARIDE_PCD
 866         { "pcd.", pcd_setup },
 867 #endif
 868 #ifdef CONFIG_PARIDE_PF
 869         { "pf.", pf_setup },
 870 #endif
 871 #ifdef CONFIG_PARIDE_PT
 872         { "pt.", pt_setup },
 873 #endif
 874 #ifdef CONFIG_PARIDE_PG
 875         { "pg.", pg_setup },
 876 #endif
 877         { 0, 0 }
 878 };
 879
 880 #ifdef CONFIG_BLK_DEV_RAM
 881 static void __init ramdisk_start_setup(char *str, int *ints)
 882 {
 883    if (ints[0] > 0 && ints[1] >= 0)
 884       rd_image_start = ints[1];
 885 }
 886
 887 static void __init load_ramdisk(char *str, int *ints)
 888 {
 889    if (ints[0] > 0 && ints[1] >= 0)
 890       rd_doload = ints[1] & 1;
 891 }
 892
 893 static void __init prompt_ramdisk(char *str, int *ints)
 894 {
 895    if (ints[0] > 0 && ints[1] >= 0)
 896       rd_prompt = ints[1] & 1;
 897 }
 898
 899 static void __init ramdisk_size(char *str, int *ints)
 900 {
 901         if (ints[0] > 0 && ints[1] >= 0)
 902                 rd_size = ints[1];
 903 }
 904 #endif
 905
 906 static int __init checksetup(char *line)
 907 {
 908         int i, ints[11];
 909
 910 #ifdef CONFIG_BLK_DEV_IDE
 911         /* ide driver needs the basic string, rather than pre-processed values */
 912         if (!strncmp(line,"ide",3) || (!strncmp(line,"hd",2) && line[2] != '=')) {
 913                 ide_setup(line);
 914                 return 1;
 915         }
 916 #endif
 917         for (i=0; raw_params[i].str; i++) {
 918                 int n = strlen(raw_params[i].str);
 919                 if (!strncmp(line,raw_params[i].str,n)) {
 920                         raw_params[i].setup_func(line+n, NULL);
 921                         return 1;
 922                 }
 923         }
 924         for (i=0; cooked_params[i].str; i++) {
 925                 int n = strlen(cooked_params[i].str);
 926                 if (!strncmp(line,cooked_params[i].str,n)) {
 927                         cooked_params[i].setup_func(get_options(line+n, ints), ints);
 928                         return 1;
 929                 }
 930         }
 931         return 0;
 932 }
 933
 934 /* this should be approx 2 Bo*oMips to start (note initial shift), and will
 935    still work even if initially too large, it will just take slightly longer */
 936 unsigned long loops_per_sec = (1<<12);
 937
 938 /* This is the number of bits of precision for the loops_per_second.  Each
 939    bit takes on average 1.5/HZ seconds.  This (like the original) is a little
 940    better than 1% */
 941 #define LPS_PREC 8
 942
 943 void __init calibrate_delay(void)
 944 {
 945         unsigned long ticks, loopbit;
 946         int lps_precision = LPS_PREC;
 947
 948         loops_per_sec = (1<<12);
 949
 950         printk("Calibrating delay loop... ");
 951         while (loops_per_sec <<= 1) {
 952                 /* wait for "start of" clock tick */
 953                 ticks = jiffies;
 954                 while (ticks == jiffies)
 955                         /* nothing */;
 956                 /* Go .. */
 957                 ticks = jiffies;
 958                 __delay(loops_per_sec);
 959                 ticks = jiffies - ticks;
 960                 if (ticks)
 961                         break;
 962                 }
 963
 964 /* Do a binary approximation to get loops_per_second set to equal one clock
 965    (up to lps_precision bits) */
 966         loops_per_sec >>= 1;
 967         loopbit = loops_per_sec;
 968         while ( lps_precision-- && (loopbit >>= 1) ) {
 969                 loops_per_sec |= loopbit;
 970                 ticks = jiffies;
 971                 while (ticks == jiffies);
 972                 ticks = jiffies;
 973                 __delay(loops_per_sec);
 974                 if (jiffies != ticks)   /* longer than 1 tick */
 975                         loops_per_sec &= ~loopbit;
 976         }
 977
 978 /* finally, adjust loops per second in terms of seconds instead of clocks */
 979         loops_per_sec *= HZ;
 980 /* Round the value and print it */
 981         printk("%lu.%02lu BogoMIPS\n",
 982                 (loops_per_sec+2500)/500000,
 983                 ((loops_per_sec+2500)/5000) % 100);
 984 }
 985
 986 /*
 987  * This is a simple kernel command line parsing function: it parses
 988  * the command line, and fills in the arguments/environment to init
 989  * as appropriate. Any cmd-line option is taken to be an environment
 990  * variable if it contains the character '='.
 991  *
 992  * This routine also checks for options meant for the kernel.
 993  * These options are not given to init - they are for internal kernel use only.
 994  */
 995 static void __init parse_options(char *line)
 996 {
 997         char *next;
 998         int args, envs;
 999
1000         if (!*line)
1001                 return;
1002         args = 0;
1003         envs = 1;       /* TERM is set to 'linux' by default */
1004         next = line;
1005         while ((line = next) != NULL) {
1006                 if ((next = strchr(line,' ')) != NULL)
1007                         *next++ = 0;
1008                 /*
1009                  * check for kernel options first..
1010                  */
1011                 if (!strcmp(line,"ro")) {
1012                         root_mountflags |= MS_RDONLY;
1013                         continue;
1014                 }
1015                 if (!strcmp(line,"rw")) {
1016                         root_mountflags &= ~MS_RDONLY;
1017                         continue;
1018                 }
1019                 if (!strcmp(line,"debug")) {
1020                         console_loglevel = 10;
1021                         continue;
1022                 }
1023                 if (!strncmp(line,"init=",5)) {
1024                         line += 5;
1025                         execute_command = line;
1026                         /* In case LILO is going to boot us with default command line,
1027                          * it prepends "auto" before the whole cmdline which makes
1028                          * the shell think it should execute a script with such name.
1029                          * So we ignore all arguments entered _before_ init=... [MJ]
1030                          */
1031                         args = 0;
1032                         continue;
1033                 }
1034                 if (checksetup(line))
1035                         continue;
1036
1037                 /*
1038                  * Then check if it's an environment variable or
1039                  * an option.
1040                  */
1041                 if (strchr(line,'=')) {
1042                         if (envs >= MAX_INIT_ENVS)
1043                                 break;
1044                         envp_init[++envs] = line;
1045                 } else {
1046                         if (args >= MAX_INIT_ARGS)
1047                                 break;
1048                         argv_init[++args] = line;
1049                 }
1050         }
1051         argv_init[args+1] = NULL;
1052         envp_init[envs+1] = NULL;
1053 }
1054
1055
1056 extern void setup_arch(char **, unsigned long *, unsigned long *);
1057
1058 #ifndef __SMP__
1059
1060 /*
1061  *      Uniprocessor idle thread
1062  */
1063
1064 int cpu_idle(void *unused)
1065 {
1066         for(;;)
1067                 idle();
1068 }
1069
1070 #define smp_init()      do { } while (0)
1071
1072 #else
1073
1074 /*
1075  *      Multiprocessor idle thread is in arch/...
1076  */
1077
1078 extern int cpu_idle(void * unused);
1079
1080 /* Called by boot processor to activate the rest. */
1081 static void __init smp_init(void)
1082 {
1083         /* Get other processors into their bootup holding patterns. */
1084         smp_boot_cpus();
1085         smp_threads_ready=1;
1086         smp_commence();
1087 }
1088
1089 #endif
1090
1091 extern void initialize_secondary(void);
1092
1093 /*
1094  *      Activate the first processor.
1095  */
1096
1097 asmlinkage void __init start_kernel(void)
1098 {
1099         char * command_line;
1100
1101 #ifdef __SMP__
1102         static int boot_cpu = 1;
1103         /* "current" has been set up, we need to load it now */
1104         if (!boot_cpu)
1105                 initialize_secondary();
1106         boot_cpu = 0;
1107 #endif
1108
1109 /*
1110  * Interrupts are still disabled. Do necessary setups, then
1111  * enable them
1112  */
1113         printk(linux_banner);
1114         setup_arch(&command_line, &memory_start, &memory_end);
1115         memory_start = paging_init(memory_start,memory_end);
1116         trap_init();
1117         init_IRQ();
1118         sched_init();
1119         time_init();
1120         parse_options(command_line);
1121
1122         /*
1123          * HACK ALERT! This is early. We're enabling the console before
1124          * we've done PCI setups etc, and console_init() must be aware of
1125          * this. But we do want output early, in case something goes wrong.
1126          */
1127         memory_start = console_init(memory_start,memory_end);
1128 #ifdef CONFIG_MODULES
1129         init_modules();
1130 #endif
1131         if (prof_shift) {
1132                 prof_buffer = (unsigned int *) memory_start;
1133                 /* only text is profiled */
1134                 prof_len = (unsigned long) &_etext - (unsigned long) &_stext;
1135                 prof_len >>= prof_shift;
1136                 memory_start += prof_len * sizeof(unsigned int);
1137                 memset(prof_buffer, 0, prof_len * sizeof(unsigned int));
1138         }
1139
1140         memory_start = kmem_cache_init(memory_start, memory_end);
1141         sti();
1142         calibrate_delay();
1143 #ifdef CONFIG_BLK_DEV_INITRD
1144         if (initrd_start && !initrd_below_start_ok && initrd_start < memory_start) {
1145                 printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
1146                     "disabling it.\n",initrd_start,memory_start);
1147                 initrd_start = 0;
1148         }
1149 #endif
1150         mem_init(memory_start,memory_end);
1151         kmem_cache_sizes_init();
1152 #ifdef CONFIG_PROC_FS
1153         proc_root_init();
1154 #endif
1155         uidcache_init();
1156         filescache_init();
1157         dcache_init();
1158         vma_init();
1159         buffer_init();
1160         signals_init();
1161         inode_init();
1162         file_table_init();
1163 #if defined(CONFIG_SYSVIPC)
1164         ipc_init();
1165 #endif
1166 #if defined(CONFIG_QUOTA)
1167         dquot_init_hash();
1168 #endif
1169         check_bugs();
1170         printk("POSIX conformance testing by UNIFIX\n");
1171
1172         /*
1173          *      We count on the initial thread going ok
1174          *      Like idlers init is an unlocked kernel thread, which will
1175          *      make syscalls (and thus be locked).
1176          */
1177         smp_init();
1178         kernel_thread(init, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1179         cpu_idle(NULL);
1180 }
1181
1182 #ifdef CONFIG_BLK_DEV_INITRD
1183 static int do_linuxrc(void * shell)
1184 {
1185         static char *argv[] = { "linuxrc", NULL, };
1186
1187         close(0);close(1);close(2);
1188         setsid();
1189         (void) open("/dev/console",O_RDWR,0);
1190         (void) dup(0);
1191         (void) dup(0);
1192         return execve(shell, argv, envp_init);
1193 }
1194
1195 static void __init no_initrd(char *s,int *ints)
1196 {
1197         mount_initrd = 0;
1198 }
1199 #endif
1200
1201 struct task_struct *child_reaper = &init_task;
1202
1203 /*
1204  * Ok, the machine is now initialized. None of the devices
1205  * have been touched yet, but the CPU subsystem is up and
1206  * running, and memory and process management works.
1207  *
1208  * Now we can finally start doing some real work..
1209  */
1210 static void __init do_basic_setup(void)
1211 {
1212 #ifdef CONFIG_BLK_DEV_INITRD
1213         int real_root_mountflags;
1214 #endif
1215
1216         /*
1217          * Tell the world that we're going to be the grim
1218          * reaper of innocent orphaned children.
1219          *
1220          * We don't want people to have to make incorrect
1221          * assumptions about where in the task array this
1222          * can be found.
1223          */
1224         child_reaper = current;
1225
1226 #if defined(CONFIG_MTRR)        /* Do this after SMP initialization */
1227 /*
1228  * We should probably create some architecture-dependent "fixup after
1229  * everything is up" style function where this would belong better
1230  * than in init/main.c..
1231  */
1232         mtrr_init();
1233 #endif
1234
1235 #ifdef CONFIG_SYSCTL
1236         sysctl_init();
1237 #endif
1238
1239         /*
1240          * Ok, at this point all CPU's should be initialized, so
1241          * we can start looking into devices..
1242          */
1243 #ifdef CONFIG_PCI
1244         pci_init();
1245 #endif
1246 #ifdef CONFIG_SBUS
1247         sbus_init();
1248 #endif
1249 #if defined(CONFIG_PMAC) || defined(CONFIG_CHRP)
1250         powermac_init();
1251 #endif
1252 #ifdef CONFIG_MCA
1253         mca_init();
1254 #endif
1255 #ifdef CONFIG_ARCH_ACORN
1256         ecard_init();
1257 #endif
1258 #ifdef CONFIG_ZORRO
1259         zorro_init();
1260 #endif
1261 #ifdef CONFIG_DIO
1262         dio_init();
1263 #endif
1264
1265         /* Networking initialization needs a process context */
1266         sock_init();
1267
1268         /* Launch bdflush from here, instead of the old syscall way. */
1269         kernel_thread(bdflush, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1270         /* Start the background pageout daemon. */
1271         kswapd_setup();
1272         kernel_thread(kswapd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1273
1274 #if CONFIG_AP1000
1275         /* Start the async paging daemon. */
1276         {
1277           extern int asyncd(void *);
1278           kernel_thread(asyncd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1279         }
1280 #endif
1281
1282 #ifdef CONFIG_BLK_DEV_INITRD
1283
1284         real_root_dev = ROOT_DEV;
1285         real_root_mountflags = root_mountflags;
1286         if (initrd_start && mount_initrd) root_mountflags &= ~MS_RDONLY;
1287         else mount_initrd =0;
1288 #endif
1289
1290         /* Set up devices .. */
1291         device_setup();
1292
1293         /* .. executable formats .. */
1294         binfmt_setup();
1295
1296         /* .. filesystems .. */
1297         filesystem_setup();
1298
1299         /* Mount the root filesystem.. */
1300         mount_root();
1301
1302 #ifdef CONFIG_UMSDOS_FS
1303         {
1304                 /*
1305                         When mounting a umsdos fs as root, we detect
1306                         the pseudo_root (/linux) and initialise it here.
1307                         pseudo_root is defined in fs/umsdos/inode.c
1308                 */
1309                 extern struct inode *pseudo_root;
1310                 if (pseudo_root != NULL){
1311                         current->fs->root = pseudo_root->i_sb->s_root;
1312                         current->fs->pwd  = pseudo_root->i_sb->s_root;
1313                 }
1314         }
1315 #endif
1316
1317 #ifdef CONFIG_BLK_DEV_INITRD
1318         root_mountflags = real_root_mountflags;
1319         if (mount_initrd && ROOT_DEV != real_root_dev
1320             && MAJOR(ROOT_DEV) == RAMDISK_MAJOR && MINOR(ROOT_DEV) == 0) {
1321                 int error;
1322                 int i, pid;
1323
1324                 pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
1325                 if (pid>0)
1326                         while (pid != wait(&i));
1327                 if (MAJOR(real_root_dev) != RAMDISK_MAJOR
1328                      || MINOR(real_root_dev) != 0) {
1329                         error = change_root(real_root_dev,"/initrd");
1330                         if (error)
1331                                 printk(KERN_ERR "Change root to /initrd: "
1332                                     "error %d\n",error);
1333                 }
1334         }
1335 #endif
1336 }
1337
1338 static int init(void * unused)
1339 {
1340         lock_kernel();
1341         do_basic_setup();
1342
1343         /*
1344          * Ok, we have completed the initial bootup, and
1345          * we're essentially up and running. Get rid of the
1346          * initmem segments and start the user-mode stuff..
1347          */
1348         free_initmem();
1349         unlock_kernel();
1350
1351         if (open("/dev/console", O_RDWR, 0) < 0)
1352                 printk("Warning: unable to open an initial console.\n");
1353
1354         (void) dup(0);
1355         (void) dup(0);
1356
1357         /*
1358          * We try each of these until one succeeds.
1359          *
1360          * The Bourne shell can be used instead of init if we are
1361          * trying to recover a really broken machine.
1362          */
1363
1364         if (execute_command)
1365                 execve(execute_command,argv_init,envp_init);
1366         execve("/sbin/init",argv_init,envp_init);
1367         execve("/etc/init",argv_init,envp_init);
1368         execve("/bin/init",argv_init,envp_init);
1369         execve("/bin/sh",argv_init,envp_init);
1370         panic("No init found.  Try passing init= option to kernel.");
1371 }