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/config.h>
  15 #include <linux/proc_fs.h>
  16 #include <linux/unistd.h>
  17 #include <linux/ctype.h>
  18 #include <linux/delay.h>
  19 #include <linux/utsname.h>
  20 #include <linux/ioport.h>
  21 #include <linux/init.h>
  22 #include <linux/smp_lock.h>
  23 #include <linux/blk.h>
  24 #include <linux/hdreg.h>
  25
  26 #include <asm/io.h>
  27 #include <asm/bugs.h>
  28
  29 #ifdef CONFIG_PCI
  30 #include <linux/pci.h>
  31 #endif
  32
  33 #ifdef CONFIG_DIO
  34 #include <linux/dio.h>
  35 #endif
  36
  37 #ifdef CONFIG_ZORRO
  38 #include <linux/zorro.h>
  39 #endif
  40
  41 #ifdef CONFIG_MTRR
  42 #  include <asm/mtrr.h>
  43 #endif
  44
  45 #ifdef CONFIG_APM
  46 #include <linux/apm_bios.h>
  47 #endif
  48
  49 /*
  50  * Versions of gcc older than that listed below may actually compile
  51  * and link okay, but the end product can have subtle run time bugs.
  52  * To avoid associated bogus bug reports, we flatly refuse to compile
  53  * with a gcc that is known to be too old from the very beginning.
  54  */
  55 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
  56 #error sorry, your GCC is too old. It builds incorrect kernels.
  57 #endif
  58
  59 extern char _stext, _etext;
  60 extern char *linux_banner;
  61
  62 extern int console_loglevel;
  63
  64 static int init(void *);
  65 extern int bdflush(void *);
  66 extern int kswapd(void *);
  67 extern void kswapd_setup(void);
  68
  69 extern void init_IRQ(void);
  70 extern void init_modules(void);
  71 extern long console_init(long, long);
  72 extern void sock_init(void);
  73 extern void uidcache_init(void);
  74 extern void mca_init(void);
  75 extern void sbus_init(void);
  76 extern void powermac_init(void);
  77 extern void sysctl_init(void);
  78 extern void filescache_init(void);
  79 extern void signals_init(void);
  80
  81 extern void device_setup(void);
  82 extern void binfmt_setup(void);
  83 extern void free_initmem(void);
  84 extern void filesystem_setup(void);
  85
  86 #ifdef CONFIG_ARCH_ACORN
  87 extern void ecard_init(void);
  88 #endif
  89
  90 extern void smp_setup(char *str, int *ints);
  91 #ifdef __i386__
  92 extern void ioapic_pirq_setup(char *str, int *ints);
  93 extern void ioapic_setup(char *str, int *ints);
  94 #endif
  95 extern void no_scroll(char *str, int *ints);
  96 extern void kbd_reset_setup(char *str, int *ints);
  97 extern void panic_setup(char *str, int *ints);
  98 extern void bmouse_setup(char *str, int *ints);
  99 extern void msmouse_setup(char *str, int *ints);
 100 extern void console_setup(char *str, int *ints);
 101 #ifdef CONFIG_PRINTER
 102 extern void lp_setup(char *str, int *ints);
 103 #endif
 104 #ifdef CONFIG_JOY_AMIGA
 105 extern void js_am_setup(char *str, int *ints);
 106 #endif
 107 #ifdef CONFIG_JOY_ANALOG
 108 extern void js_an_setup(char *str, int *ints);
 109 #endif
 110 #ifdef CONFIG_JOY_ASSASIN
 111 extern void js_as_setup(char *str, int *ints);
 112 #endif
 113 #ifdef CONFIG_JOY_CONSOLE
 114 extern void js_console_setup(char *str, int *ints);
 115 #endif
 116 #ifdef CONFIG_JOY_DB9
 117 extern void js_db9_setup(char *str, int *ints);
 118 #endif
 119 #ifdef CONFIG_JOY_TURBOGRAFX
 120 extern void js_tg_setup(char *str, int *ints);
 121 #endif
 122 #ifdef CONFIG_JOY_LIGHTNING
 123 extern void js_l4_setup(char *str, int *ints);
 124 #endif
 125 extern void eth_setup(char *str, int *ints);
 126 #ifdef CONFIG_ARCNET_COM20020
 127 extern void com20020_setup(char *str, int *ints);
 128 #endif
 129 #ifdef CONFIG_ARCNET_RIM_I
 130 extern void arcrimi_setup(char *str, int *ints);
 131 #endif
 132 #ifdef CONFIG_ARCNET_COM90xxIO
 133 extern void com90io_setup(char *str, int *ints);
 134 #endif
 135 #ifdef CONFIG_ARCNET_COM90xx
 136 extern void com90xx_setup(char *str, int *ints);
 137 #endif
 138 #ifdef CONFIG_DECNET
 139 extern void decnet_setup(char *str, int *ints);
 140 #endif
 141 #ifdef CONFIG_BLK_DEV_XD
 142 extern void xd_setup(char *str, int *ints);
 143 extern void xd_manual_geo_init(char *str, int *ints);
 144 #endif
 145 #ifdef CONFIG_BLK_DEV_IDE
 146 extern void ide_setup(char *);
 147 #endif
 148 #ifdef CONFIG_PARIDE_PD
 149 extern void pd_setup(char *str, int *ints);
 150 #endif
 151 #ifdef CONFIG_PARIDE_PF
 152 extern void pf_setup(char *str, int *ints);
 153 #endif
 154 #ifdef CONFIG_PARIDE_PT
 155 extern void pt_setup(char *str, int *ints);
 156 #endif
 157 #ifdef CONFIG_PARIDE_PG
 158 extern void pg_setup(char *str, int *ints);
 159 #endif
 160 #ifdef CONFIG_PARIDE_PCD
 161 extern void pcd_setup(char *str, int *ints);
 162 #endif
 163 extern void floppy_setup(char *str, int *ints);
 164 extern void st_setup(char *str, int *ints);
 165 extern void st0x_setup(char *str, int *ints);
 166 extern void advansys_setup(char *str, int *ints);
 167 extern void tmc8xx_setup(char *str, int *ints);
 168 extern void t128_setup(char *str, int *ints);
 169 extern void pas16_setup(char *str, int *ints);
 170 extern void generic_NCR5380_setup(char *str, int *intr);
 171 extern void generic_NCR53C400_setup(char *str, int *intr);
 172 extern void generic_NCR53C400A_setup(char *str, int *intr);
 173 extern void generic_DTC3181E_setup(char *str, int *intr);
 174 extern void aha152x_setup(char *str, int *ints);
 175 extern void aha1542_setup(char *str, int *ints);
 176 extern void gdth_setup(char *str, int *ints);
 177 extern void aic7xxx_setup(char *str, int *ints);
 178 extern void AM53C974_setup(char *str, int *ints);
 179 extern void BusLogic_Setup(char *str, int *ints);
 180 extern void ncr53c8xx_setup(char *str, int *ints);
 181 extern void eata2x_setup(char *str, int *ints);
 182 extern void u14_34f_setup(char *str, int *ints);
 183 extern void fdomain_setup(char *str, int *ints);
 184 extern void ibmmca_scsi_setup(char *str, int *ints);
 185 extern void in2000_setup(char *str, int *ints);
 186 extern void NCR53c406a_setup(char *str, int *ints);
 187 extern void wd7000_setup(char *str, int *ints);
 188 extern void dc390_setup(char* str, int *ints);
 189 extern void scsi_luns_setup(char *str, int *ints);
 190 extern void scsi_logging_setup(char *str, int *ints);
 191 extern void sound_setup(char *str, int *ints);
 192 extern void reboot_setup(char *str, int *ints);
 193 extern void video_setup(char *str, int *ints);
 194 #ifdef CONFIG_CDU31A
 195 extern void cdu31a_setup(char *str, int *ints);
 196 #endif CONFIG_CDU31A
 197 #ifdef CONFIG_BLK_DEV_PS2
 198 extern void ed_setup(char *str, int *ints);
 199 extern void tp720_setup(char *str, int *ints);
 200 #endif CONFIG_BLK_DEV_PS2
 201 #ifdef CONFIG_MCD
 202 extern void mcd_setup(char *str, int *ints);
 203 #endif CONFIG_MCD
 204 #ifdef CONFIG_MCDX
 205 extern void mcdx_setup(char *str, int *ints);
 206 #endif CONFIG_MCDX
 207 #ifdef CONFIG_SBPCD
 208 extern void sbpcd_setup(char *str, int *ints);
 209 #endif CONFIG_SBPCD
 210 #ifdef CONFIG_AZTCD
 211 extern void aztcd_setup(char *str, int *ints);
 212 #endif CONFIG_AZTCD
 213 #ifdef CONFIG_CDU535
 214 extern void sonycd535_setup(char *str, int *ints);
 215 #endif CONFIG_CDU535
 216 #ifdef CONFIG_GSCD
 217 extern void gscd_setup(char *str, int *ints);
 218 #endif CONFIG_GSCD
 219 #ifdef CONFIG_CM206
 220 extern void cm206_setup(char *str, int *ints);
 221 #endif CONFIG_CM206
 222 #ifdef CONFIG_OPTCD
 223 extern void optcd_setup(char *str, int *ints);
 224 #endif CONFIG_OPTCD
 225 #ifdef CONFIG_SJCD
 226 extern void sjcd_setup(char *str, int *ints);
 227 #endif CONFIG_SJCD
 228 #ifdef CONFIG_ISP16_CDI
 229 extern void isp16_setup(char *str, int *ints);
 230 #endif CONFIG_ISP16_CDI
 231 #ifdef CONFIG_BLK_DEV_RAM
 232 static void ramdisk_start_setup(char *str, int *ints);
 233 static void load_ramdisk(char *str, int *ints);
 234 static void prompt_ramdisk(char *str, int *ints);
 235 static void ramdisk_size(char *str, int *ints);
 236 #ifdef CONFIG_BLK_DEV_INITRD
 237 static void no_initrd(char *s,int *ints);
 238 #endif
 239 #endif CONFIG_BLK_DEV_RAM
 240 #ifdef CONFIG_ISDN_DRV_ICN
 241 extern void icn_setup(char *str, int *ints);
 242 #endif
 243 #ifdef CONFIG_ISDN_DRV_HISAX
 244 extern void HiSax_setup(char *str, int *ints);
 245 #endif
 246 #ifdef CONFIG_DIGIEPCA
 247 extern void epca_setup(char *str, int *ints);
 248 #endif
 249 #ifdef CONFIG_ISDN_DRV_PCBIT
 250 extern void pcbit_setup(char *str, int *ints);
 251 #endif
 252
 253 #ifdef CONFIG_ATARIMOUSE
 254 extern void atari_mouse_setup (char *str, int *ints);
 255 #endif
 256 #ifdef CONFIG_DMASOUND
 257 extern void dmasound_setup (char *str, int *ints);
 258 #endif
 259 #ifdef CONFIG_ATARI_SCSI
 260 extern void atari_scsi_setup (char *str, int *ints);
 261 #endif
 262 extern void stram_swap_setup (char *str, int *ints);
 263 extern void wd33c93_setup (char *str, int *ints);
 264 extern void gvp11_setup (char *str, int *ints);
 265 extern void ncr53c7xx_setup (char *str, int *ints);
 266 #ifdef CONFIG_MAC_SCSI
 267 extern void mac_scsi_setup (char *str, int *ints);
 268 #endif
 269
 270 #ifdef CONFIG_CYCLADES
 271 extern void cy_setup(char *str, int *ints);
 272 #endif
 273 #ifdef CONFIG_DIGI
 274 extern void pcxx_setup(char *str, int *ints);
 275 #endif
 276 #ifdef CONFIG_RISCOM8
 277 extern void riscom8_setup(char *str, int *ints);
 278 #endif
 279 #ifdef CONFIG_SPECIALIX
 280 extern void specialix_setup(char *str, int *ints);
 281 #endif
 282 #ifdef CONFIG_DMASCC
 283 extern void dmascc_setup(char *str, int *ints);
 284 #endif
 285 #ifdef CONFIG_BAYCOM_PAR
 286 extern void baycom_par_setup(char *str, int *ints);
 287 #endif
 288 #ifdef CONFIG_BAYCOM_SER_FDX
 289 extern void baycom_ser_fdx_setup(char *str, int *ints);
 290 #endif
 291 #ifdef CONFIG_BAYCOM_SER_HDX
 292 extern void baycom_ser_hdx_setup(char *str, int *ints);
 293 #endif
 294 #ifdef CONFIG_SOUNDMODEM
 295 extern void sm_setup(char *str, int *ints);
 296 #endif
 297 #ifdef CONFIG_ADBMOUSE
 298 extern void adb_mouse_setup(char *str, int *ints);
 299 #endif
 300 #ifdef CONFIG_WDT
 301 extern void wdt_setup(char *str, int *ints);
 302 #endif
 303 #ifdef CONFIG_PARPORT
 304 extern void parport_setup(char *str, int *ints);
 305 #endif
 306 #ifdef CONFIG_PLIP
 307 extern void plip_setup(char *str, int *ints);
 308 #endif
 309 #ifdef CONFIG_HFMODEM
 310 extern void hfmodem_setup(char *str, int *ints);
 311 #endif
 312 #ifdef CONFIG_IP_PNP
 313 extern void ip_auto_config_setup(char *str, int *ints);
 314 #endif
 315 #ifdef CONFIG_ROOT_NFS
 316 extern void nfs_root_setup(char *str, int *ints);
 317 #endif
 318 #ifdef CONFIG_FTAPE
 319 extern void ftape_setup(char *str, int *ints);
 320 #endif
 321 #ifdef CONFIG_MDA_CONSOLE
 322 extern void mdacon_setup(char *str, int *ints);
 323 #endif
 324 #ifdef CONFIG_LTPC
 325 extern void ltpc_setup(char *str, int *ints);
 326 #endif
 327
 328 #if defined(CONFIG_SYSVIPC)
 329 extern void ipc_init(void);
 330 #endif
 331 #if defined(CONFIG_QUOTA)
 332 extern void dquot_init_hash(void);
 333 #endif
 334
 335 #ifdef CONFIG_MD_BOOT
 336 extern void md_setup(char *str,int *ints) __init;
 337 #endif
 338
 339 /*
 340  * Boot command-line arguments
 341  */
 342 #define MAX_INIT_ARGS 8
 343 #define MAX_INIT_ENVS 8
 344
 345 extern void time_init(void);
 346
 347 static unsigned long memory_start = 0;
 348 static unsigned long memory_end = 0;
 349
 350 int rows, cols;
 351
 352 #ifdef CONFIG_BLK_DEV_RAM
 353 extern int rd_doload;           /* 1 = load ramdisk, 0 = don't load */
 354 extern int rd_prompt;           /* 1 = prompt for ramdisk, 0 = don't prompt */
 355 extern int rd_size;             /* Size of the ramdisk(s) */
 356 extern int rd_image_start;      /* starting block # of image */
 357 #ifdef CONFIG_BLK_DEV_INITRD
 358 kdev_t real_root_dev;
 359 #endif
 360 #endif
 361
 362 int root_mountflags = MS_RDONLY;
 363 char *execute_command = NULL;
 364
 365 static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
 366 static char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
 367
 368 char *get_options(char *str, int *ints)
 369 {
 370         char *cur = str;
 371         int i=1;
 372
 373         while (cur && (*cur=='-' || isdigit(*cur)) && i <= 10) {
 374                 ints[i++] = simple_strtol(cur,NULL,0);
 375                 if ((cur = strchr(cur,',')) != NULL)
 376                         cur++;
 377         }
 378         ints[0] = i-1;
 379         return(cur);
 380 }
 381
 382 static void __init profile_setup(char *str, int *ints)
 383 {
 384         if (ints[0] > 0)
 385                 prof_shift = (unsigned long) ints[1];
 386         else
 387                 prof_shift = 2;
 388 }
 389
 390
 391 static struct dev_name_struct {
 392         const char *name;
 393         const int num;
 394 } root_dev_names[] __initdata = {
 395 #ifdef CONFIG_ROOT_NFS
 396         { "nfs",     0x00ff },
 397 #endif
 398 #ifdef CONFIG_BLK_DEV_IDE
 399         { "hda",     0x0300 },
 400         { "hdb",     0x0340 },
 401         { "hdc",     0x1600 },
 402         { "hdd",     0x1640 },
 403         { "hde",     0x2100 },
 404         { "hdf",     0x2140 },
 405         { "hdg",     0x2200 },
 406         { "hdh",     0x2240 },
 407         { "hdi",     0x3800 },
 408         { "hdj",     0x3840 },
 409         { "hdk",     0x3900 },
 410         { "hdl",     0x3940 },
 411 #endif
 412 #ifdef CONFIG_BLK_DEV_SD
 413         { "sda",     0x0800 },
 414         { "sdb",     0x0810 },
 415         { "sdc",     0x0820 },
 416         { "sdd",     0x0830 },
 417         { "sde",     0x0840 },
 418         { "sdf",     0x0850 },
 419         { "sdg",     0x0860 },
 420         { "sdh",     0x0870 },
 421         { "sdi",     0x0880 },
 422         { "sdj",     0x0890 },
 423         { "sdk",     0x08a0 },
 424         { "sdl",     0x08b0 },
 425         { "sdm",     0x08c0 },
 426         { "sdn",     0x08d0 },
 427         { "sdo",     0x08e0 },
 428         { "sdp",     0x08f0 },
 429 #endif
 430 #ifdef CONFIG_ATARI_ACSI
 431         { "ada",     0x1c00 },
 432         { "adb",     0x1c10 },
 433         { "adc",     0x1c20 },
 434         { "add",     0x1c30 },
 435         { "ade",     0x1c40 },
 436 #endif
 437 #ifdef CONFIG_BLK_DEV_FD
 438         { "fd",      0x0200 },
 439 #endif
 440 #ifdef CONFIG_MD_BOOT
 441         { "md",      0x0900 },
 442 #endif
 443 #ifdef CONFIG_BLK_DEV_XD
 444         { "xda",     0x0d00 },
 445         { "xdb",     0x0d40 },
 446 #endif
 447 #ifdef CONFIG_BLK_DEV_RAM
 448         { "ram",     0x0100 },
 449 #endif
 450 #ifdef CONFIG_BLK_DEV_SR
 451         { "scd",     0x0b00 },
 452 #endif
 453 #ifdef CONFIG_MCD
 454         { "mcd",     0x1700 },
 455 #endif
 456 #ifdef CONFIG_CDU535
 457         { "cdu535",  0x1800 },
 458         { "sonycd",  0x1800 },
 459 #endif
 460 #ifdef CONFIG_AZTCD
 461         { "aztcd",   0x1d00 },
 462 #endif
 463 #ifdef CONFIG_CM206
 464         { "cm206cd", 0x2000 },
 465 #endif
 466 #ifdef CONFIG_GSCD
 467         { "gscd",    0x1000 },
 468 #endif
 469 #ifdef CONFIG_SBPCD
 470         { "sbpcd",   0x1900 },
 471 #endif
 472 #ifdef CONFIG_BLK_DEV_PS2
 473         { "eda",     0x2400 },
 474         { "edb",     0x2440 },
 475 #endif
 476 #ifdef CONFIG_PARIDE_PD
 477         { "pda",        0x2d00 },
 478         { "pdb",        0x2d10 },
 479         { "pdc",        0x2d20 },
 480         { "pdd",        0x2d30 },
 481 #endif
 482 #ifdef CONFIG_PARIDE_PCD
 483         { "pcd",        0x2e00 },
 484 #endif
 485 #ifdef CONFIG_PARIDE_PF
 486         { "pf",         0x2f00 },
 487 #endif
 488 #if CONFIG_APBLOCK
 489         { "apblock", APBLOCK_MAJOR << 8},
 490 #endif
 491 #if CONFIG_DDV
 492         { "ddv", DDV_MAJOR << 8},
 493 #endif
 494         { NULL, 0 }
 495 };
 496
 497 kdev_t __init name_to_kdev_t(char *line)
 498 {
 499         int base = 0;
 500         if (strncmp(line,"/dev/",5) == 0) {
 501                 struct dev_name_struct *dev = root_dev_names;
 502                 line += 5;
 503                 do {
 504                         int len = strlen(dev->name);
 505                         if (strncmp(line,dev->name,len) == 0) {
 506                                 line += len;
 507                                 base = dev->num;
 508                                 break;
 509                         }
 510                         dev++;
 511                 } while (dev->name);
 512         }
 513         return to_kdev_t(base + simple_strtoul(line,NULL,base?10:16));
 514 }
 515
 516 static void __init root_dev_setup(char *line, int *num)
 517 {
 518         ROOT_DEV = name_to_kdev_t(line);
 519 }
 520
 521 /*
 522  * List of kernel command line parameters. The first table lists parameters
 523  * which are subject to values parsing (leading numbers are converted to
 524  * an array of ints and chopped off the string), the second table contains
 525  * the few exceptions which obey their own syntax rules.
 526  */
 527
 528 struct kernel_param {
 529         const char *str;
 530         void (*setup_func)(char *, int *);
 531 };
 532
 533 static struct kernel_param cooked_params[] __initdata = {
 534 /* FIXME: make PNP just become reserve_setup */
 535 #ifndef CONFIG_KERNEL_PNP_RESOURCE
 536         { "reserve=", reserve_setup },
 537 #else
 538         { "reserve=", pnp_reserve_setup },
 539 #endif
 540         { "profile=", profile_setup },
 541 #ifdef __SMP__
 542         { "nosmp", smp_setup },
 543         { "maxcpus=", smp_setup },
 544 #ifdef CONFIG_X86_IO_APIC
 545         { "noapic", ioapic_setup },
 546         { "pirq=", ioapic_pirq_setup },
 547 #endif
 548 #endif
 549 #ifdef CONFIG_BLK_DEV_RAM
 550         { "ramdisk_start=", ramdisk_start_setup },
 551         { "load_ramdisk=", load_ramdisk },
 552         { "prompt_ramdisk=", prompt_ramdisk },
 553         { "ramdisk=", ramdisk_size },
 554         { "ramdisk_size=", ramdisk_size },
 555 #ifdef CONFIG_BLK_DEV_INITRD
 556         { "noinitrd", no_initrd },
 557 #endif
 558 #endif
 559 #ifdef CONFIG_FB
 560         { "video=", video_setup },
 561 #endif
 562         { "panic=", panic_setup },
 563         { "console=", console_setup },
 564 #ifdef CONFIG_VGA_CONSOLE
 565         { "no-scroll", no_scroll },
 566 #endif
 567 #ifdef CONFIG_MDA_CONSOLE
 568         { "mdacon=", mdacon_setup },
 569 #endif
 570 #ifdef CONFIG_VT
 571         { "kbd-reset", kbd_reset_setup },
 572 #endif
 573 #ifdef CONFIG_BUGi386
 574         { "no-hlt", no_halt },
 575         { "no387", no_387 },
 576         { "reboot=", reboot_setup },
 577 #endif
 578 #ifdef CONFIG_INET
 579         { "ether=", eth_setup },
 580 #endif
 581 #ifdef CONFIG_ARCNET_COM20020
 582         { "com20020=", com20020_setup },
 583 #endif
 584 #ifdef CONFIG_ARCNET_RIM_I
 585         { "arcrimi=", arcrimi_setup },
 586 #endif
 587 #ifdef CONFIG_ARCNET_COM90xxIO
 588         { "com90io=", com90io_setup },
 589 #endif
 590 #ifdef CONFIG_ARCNET_COM90xx
 591         { "com90xx=", com90xx_setup },
 592 #endif
 593 #ifdef CONFIG_DECNET
 594         { "decnet=", decnet_setup },
 595 #endif
 596 #ifdef CONFIG_PRINTER
 597         { "lp=", lp_setup },
 598 #endif
 599 #ifdef CONFIG_JOY_AMIGA
 600         { "js_am=", js_am_setup },
 601 #endif
 602 #ifdef CONFIG_JOY_ANALOG
 603         { "js_an=", js_an_setup },
 604 #endif
 605 #ifdef CONFIG_JOY_ASSASIN
 606         { "js_as=", js_as_setup },
 607 #endif
 608 #ifdef CONFIG_JOY_CONSOLE
 609         { "js_console=", js_console_setup },
 610         { "js_console2=", js_console_setup },
 611         { "js_console3=", js_console_setup },
 612 #endif
 613 #ifdef CONFIG_JOY_DB9
 614         { "js_db9=", js_db9_setup },
 615         { "js_db9_2=", js_db9_setup },
 616         { "js_db9_3=", js_db9_setup },
 617 #endif
 618 #ifdef CONFIG_JOY_TURBOGRAFX
 619         { "js_tg=", js_tg_setup },
 620         { "js_tg_2=", js_tg_setup },
 621         { "js_tg_3=", js_tg_setup },
 622 #endif
 623 #ifdef CONFIG_SCSI
 624         { "max_scsi_luns=", scsi_luns_setup },
 625         { "scsi_logging=", scsi_logging_setup },
 626 #endif
 627 #ifdef CONFIG_JOY_LIGHTNING
 628         { "js_l4=", js_l4_setup },
 629 #endif
 630 #ifdef CONFIG_SCSI_ADVANSYS
 631         { "advansys=", advansys_setup },
 632 #endif
 633 #if defined(CONFIG_BLK_DEV_HD)
 634         { "hd=", hd_setup },
 635 #endif
 636 #ifdef CONFIG_CHR_DEV_ST
 637         { "st=", st_setup },
 638 #endif
 639 #ifdef CONFIG_BUSMOUSE
 640         { "bmouse=", bmouse_setup },
 641 #endif
 642 #ifdef CONFIG_MS_BUSMOUSE
 643         { "msmouse=", msmouse_setup },
 644 #endif
 645 #ifdef CONFIG_SCSI_SEAGATE
 646         { "st0x=", st0x_setup },
 647         { "tmc8xx=", tmc8xx_setup },
 648 #endif
 649 #ifdef CONFIG_SCSI_T128
 650         { "t128=", t128_setup },
 651 #endif
 652 #ifdef CONFIG_SCSI_PAS16
 653         { "pas16=", pas16_setup },
 654 #endif
 655 #ifdef CONFIG_SCSI_GENERIC_NCR5380
 656         { "ncr5380=", generic_NCR5380_setup },
 657         { "ncr53c400=", generic_NCR53C400_setup },
 658         { "ncr53c400a=", generic_NCR53C400A_setup },
 659         { "dtc3181e=", generic_DTC3181E_setup },
 660 #endif
 661 #ifdef CONFIG_SCSI_AHA152X
 662         { "aha152x=", aha152x_setup},
 663 #endif
 664 #ifdef CONFIG_SCSI_AHA1542
 665         { "aha1542=", aha1542_setup},
 666 #endif
 667 #ifdef CONFIG_SCSI_GDTH
 668         { "gdth=", gdth_setup},
 669 #endif
 670 #ifdef CONFIG_SCSI_AIC7XXX
 671         { "aic7xxx=", aic7xxx_setup},
 672 #endif
 673 #ifdef CONFIG_SCSI_BUSLOGIC
 674         { "BusLogic=", BusLogic_Setup},
 675 #endif
 676 #ifdef CONFIG_SCSI_NCR53C8XX
 677         { "ncr53c8xx=", ncr53c8xx_setup},
 678 #endif
 679 #ifdef CONFIG_SCSI_EATA
 680         { "eata=", eata2x_setup},
 681 #endif
 682 #ifdef CONFIG_SCSI_U14_34F
 683         { "u14-34f=", u14_34f_setup},
 684 #endif
 685 #ifdef CONFIG_SCSI_AM53C974
 686         { "AM53C974=", AM53C974_setup},
 687 #endif
 688 #ifdef CONFIG_SCSI_NCR53C406A
 689         { "ncr53c406a=", NCR53c406a_setup},
 690 #endif
 691 #ifdef CONFIG_SCSI_FUTURE_DOMAIN
 692         { "fdomain=", fdomain_setup},
 693 #endif
 694 #ifdef CONFIG_SCSI_IN2000
 695         { "in2000=", in2000_setup},
 696 #endif
 697 #ifdef CONFIG_SCSI_7000FASST
 698         { "wd7000=", wd7000_setup},
 699 #endif
 700 #ifdef CONFIG_SCSI_IBMMCA
 701         { "ibmmcascsi=", ibmmca_scsi_setup },
 702 #endif
 703 #if defined(CONFIG_SCSI_DC390T) && ! defined(CONFIG_SCSI_DC390T_NOGENSUPP)
 704         { "tmscsim=", dc390_setup },
 705 #endif
 706 #ifdef CONFIG_BLK_DEV_XD
 707         { "xd=", xd_setup },
 708         { "xd_geo=", xd_manual_geo_init },
 709 #endif
 710 #if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
 711         { "floppy=", floppy_setup },
 712 #endif
 713 #ifdef CONFIG_BLK_DEV_PS2
 714         { "eda=", ed_setup },
 715         { "edb=", ed_setup },
 716         { "tp720=", tp720_setup },
 717 #endif
 718 #ifdef CONFIG_CDU31A
 719         { "cdu31a=", cdu31a_setup },
 720 #endif CONFIG_CDU31A
 721 #ifdef CONFIG_MCD
 722         { "mcd=", mcd_setup },
 723 #endif CONFIG_MCD
 724 #ifdef CONFIG_MCDX
 725         { "mcdx=", mcdx_setup },
 726 #endif CONFIG_MCDX
 727 #ifdef CONFIG_SBPCD
 728         { "sbpcd=", sbpcd_setup },
 729 #endif CONFIG_SBPCD
 730 #ifdef CONFIG_AZTCD
 731         { "aztcd=", aztcd_setup },
 732 #endif CONFIG_AZTCD
 733 #ifdef CONFIG_CDU535
 734         { "sonycd535=", sonycd535_setup },
 735 #endif CONFIG_CDU535
 736 #ifdef CONFIG_GSCD
 737         { "gscd=", gscd_setup },
 738 #endif CONFIG_GSCD
 739 #ifdef CONFIG_CM206
 740         { "cm206=", cm206_setup },
 741 #endif CONFIG_CM206
 742 #ifdef CONFIG_OPTCD
 743         { "optcd=", optcd_setup },
 744 #endif CONFIG_OPTCD
 745 #ifdef CONFIG_SJCD
 746         { "sjcd=", sjcd_setup },
 747 #endif CONFIG_SJCD
 748 #ifdef CONFIG_ISP16_CDI
 749         { "isp16=", isp16_setup },
 750 #endif CONFIG_ISP16_CDI
 751 #ifdef CONFIG_SOUND_OSS
 752         { "sound=", sound_setup },
 753 #endif
 754 #ifdef CONFIG_ISDN_DRV_ICN
 755         { "icn=", icn_setup },
 756 #endif
 757 #ifdef CONFIG_ISDN_DRV_HISAX
 758        { "hisax=", HiSax_setup },
 759        { "HiSax=", HiSax_setup },
 760 #endif
 761 #ifdef CONFIG_ISDN_DRV_PCBIT
 762         { "pcbit=", pcbit_setup },
 763 #endif
 764 #ifdef CONFIG_ATARIMOUSE
 765         { "atamouse=", atari_mouse_setup },
 766 #endif
 767 #ifdef CONFIG_DMASOUND
 768         { "dmasound=", dmasound_setup },
 769 #endif
 770 #ifdef CONFIG_ATARI_SCSI
 771         { "atascsi=", atari_scsi_setup },
 772 #endif
 773 #ifdef CONFIG_STRAM_SWAP
 774         { "stram_swap=", stram_swap_setup },
 775 #endif
 776 #if defined(CONFIG_A4000T_SCSI) || defined(CONFIG_WARPENGINE_SCSI) \
 777             || defined(CONFIG_A4091_SCSI) || defined(CONFIG_MVME16x_SCSI) \
 778             || defined(CONFIG_BVME6000_SCSI)
 779         { "53c7xx=", ncr53c7xx_setup },
 780 #endif
 781 #if defined(CONFIG_A3000_SCSI) || defined(CONFIG_A2091_SCSI) \
 782             || defined(CONFIG_GVP11_SCSI)
 783         { "wd33c93=", wd33c93_setup },
 784 #endif
 785 #if defined(CONFIG_GVP11_SCSI)
 786         { "gvp11=", gvp11_setup },
 787 #endif
 788 #ifdef CONFIG_MAC_SCSI
 789         { "mac5380=", mac_scsi_setup },
 790 #endif
 791 #ifdef CONFIG_CYCLADES
 792         { "cyclades=", cy_setup },
 793 #endif
 794 #ifdef CONFIG_DIGI
 795         { "digi=", pcxx_setup },
 796 #endif
 797 #ifdef CONFIG_DIGIEPCA
 798         { "digiepca=", epca_setup },
 799 #endif
 800 #ifdef CONFIG_RISCOM8
 801         { "riscom8=", riscom8_setup },
 802 #endif
 803 #ifdef CONFIG_DMASCC
 804         { "dmascc=", dmascc_setup },
 805 #endif
 806 #ifdef CONFIG_SPECIALIX
 807         { "specialix=", specialix_setup },
 808 #endif
 809 #ifdef CONFIG_BAYCOM_PAR
 810         { "baycom_par=", baycom_par_setup },
 811 #endif
 812 #ifdef CONFIG_BAYCOM_SER_FDX
 813         { "baycom_ser_fdx=", baycom_ser_fdx_setup },
 814 #endif
 815 #ifdef CONFIG_BAYCOM_SER_HDX
 816         { "baycom_ser_hdx=", baycom_ser_hdx_setup },
 817 #endif
 818 #ifdef CONFIG_SOUNDMODEM
 819         { "soundmodem=", sm_setup },
 820 #endif
 821 #ifdef CONFIG_WDT
 822         { "wdt=", wdt_setup },
 823 #endif
 824 #ifdef CONFIG_PARPORT
 825         { "parport=", parport_setup },
 826 #endif
 827 #ifdef CONFIG_PLIP
 828         { "plip=", plip_setup },
 829 #endif
 830 #ifdef CONFIG_HFMODEM
 831         { "hfmodem=", hfmodem_setup },
 832 #endif
 833 #ifdef CONFIG_FTAPE
 834         { "ftape=", ftape_setup},
 835 #endif
 836 #ifdef CONFIG_MD_BOOT
 837         { "md=", md_setup},
 838 #endif
 839 #ifdef CONFIG_ADBMOUSE
 840         { "adb_buttons=", adb_mouse_setup },
 841 #endif
 842 #ifdef CONFIG_LTPC
 843         { "ltpc=", ltpc_setup },
 844 #endif
 845         { 0, 0 }
 846 };
 847
 848 static struct kernel_param raw_params[] __initdata = {
 849         { "root=", root_dev_setup },
 850 #ifdef CONFIG_ROOT_NFS
 851         { "nfsroot=", nfs_root_setup },
 852         { "nfsaddrs=", ip_auto_config_setup },
 853 #endif
 854 #ifdef CONFIG_IP_PNP
 855         { "ip=", ip_auto_config_setup },
 856 #endif
 857 #ifdef CONFIG_PCI
 858         { "pci=", pci_setup },
 859 #endif
 860 #ifdef CONFIG_PARIDE_PD
 861         { "pd.", pd_setup },
 862 #endif
 863 #ifdef CONFIG_PARIDE_PCD
 864         { "pcd.", pcd_setup },
 865 #endif
 866 #ifdef CONFIG_PARIDE_PF
 867         { "pf.", pf_setup },
 868 #endif
 869 #ifdef CONFIG_PARIDE_PT
 870         { "pt.", pt_setup },
 871 #endif
 872 #ifdef CONFIG_PARIDE_PG
 873         { "pg.", pg_setup },
 874 #endif
 875 #ifdef CONFIG_APM
 876         { "apm=", apm_setup },
 877 #endif
 878         { 0, 0 }
 879 };
 880
 881 #ifdef CONFIG_BLK_DEV_RAM
 882 static void __init ramdisk_start_setup(char *str, int *ints)
 883 {
 884    if (ints[0] > 0 && ints[1] >= 0)
 885       rd_image_start = ints[1];
 886 }
 887
 888 static void __init load_ramdisk(char *str, int *ints)
 889 {
 890    if (ints[0] > 0 && ints[1] >= 0)
 891       rd_doload = ints[1] & 1;
 892 }
 893
 894 static void __init prompt_ramdisk(char *str, int *ints)
 895 {
 896    if (ints[0] > 0 && ints[1] >= 0)
 897       rd_prompt = ints[1] & 1;
 898 }
 899
 900 static void __init ramdisk_size(char *str, int *ints)
 901 {
 902         if (ints[0] > 0 && ints[1] >= 0)
 903                 rd_size = ints[1];
 904 }
 905 #endif
 906
 907 static int __init checksetup(char *line)
 908 {
 909         int i, ints[11];
 910
 911 #ifdef CONFIG_BLK_DEV_IDE
 912         /* ide driver needs the basic string, rather than pre-processed values */
 913         if (!strncmp(line,"ide",3) || (!strncmp(line,"hd",2) && line[2] != '=')) {
 914                 ide_setup(line);
 915                 return 1;
 916         }
 917 #endif
 918         for (i=0; raw_params[i].str; i++) {
 919                 int n = strlen(raw_params[i].str);
 920                 if (!strncmp(line,raw_params[i].str,n)) {
 921                         raw_params[i].setup_func(line+n, NULL);
 922                         return 1;
 923                 }
 924         }
 925         for (i=0; cooked_params[i].str; i++) {
 926                 int n = strlen(cooked_params[i].str);
 927                 if (!strncmp(line,cooked_params[i].str,n)) {
 928                         cooked_params[i].setup_func(get_options(line+n, ints), ints);
 929                         return 1;
 930                 }
 931         }
 932         return 0;
 933 }
 934
 935 /* this should be approx 2 Bo*oMips to start (note initial shift), and will
 936    still work even if initially too large, it will just take slightly longer */
 937 unsigned long loops_per_sec = (1<<12);
 938
 939 /* This is the number of bits of precision for the loops_per_second.  Each
 940    bit takes on average 1.5/HZ seconds.  This (like the original) is a little
 941    better than 1% */
 942 #define LPS_PREC 8
 943
 944 void __init calibrate_delay(void)
 945 {
 946         unsigned long ticks, loopbit;
 947         int lps_precision = LPS_PREC;
 948
 949         loops_per_sec = (1<<12);
 950
 951         printk("Calibrating delay loop... ");
 952         while (loops_per_sec <<= 1) {
 953                 /* wait for "start of" clock tick */
 954                 ticks = jiffies;
 955                 while (ticks == jiffies)
 956                         /* nothing */;
 957                 /* Go .. */
 958                 ticks = jiffies;
 959                 __delay(loops_per_sec);
 960                 ticks = jiffies - ticks;
 961                 if (ticks)
 962                         break;
 963                 }
 964
 965 /* Do a binary approximation to get loops_per_second set to equal one clock
 966    (up to lps_precision bits) */
 967         loops_per_sec >>= 1;
 968         loopbit = loops_per_sec;
 969         while ( lps_precision-- && (loopbit >>= 1) ) {
 970                 loops_per_sec |= loopbit;
 971                 ticks = jiffies;
 972                 while (ticks == jiffies);
 973                 ticks = jiffies;
 974                 __delay(loops_per_sec);
 975                 if (jiffies != ticks)   /* longer than 1 tick */
 976                         loops_per_sec &= ~loopbit;
 977         }
 978
 979 /* finally, adjust loops per second in terms of seconds instead of clocks */
 980         loops_per_sec *= HZ;
 981 /* Round the value and print it */
 982         printk("%lu.%02lu BogoMIPS\n",
 983                 (loops_per_sec+2500)/500000,
 984                 ((loops_per_sec+2500)/5000) % 100);
 985 }
 986
 987 /*
 988  * This is a simple kernel command line parsing function: it parses
 989  * the command line, and fills in the arguments/environment to init
 990  * as appropriate. Any cmd-line option is taken to be an environment
 991  * variable if it contains the character '='.
 992  *
 993  * This routine also checks for options meant for the kernel.
 994  * These options are not given to init - they are for internal kernel use only.
 995  */
 996 static void __init parse_options(char *line)
 997 {
 998         char *next;
 999         int args, envs;
1000
1001         if (!*line)
1002                 return;
1003         args = 0;
1004         envs = 1;       /* TERM is set to 'linux' by default */
1005         next = line;
1006         while ((line = next) != NULL) {
1007                 if ((next = strchr(line,' ')) != NULL)
1008                         *next++ = 0;
1009                 /*
1010                  * check for kernel options first..
1011                  */
1012                 if (!strcmp(line,"ro")) {
1013                         root_mountflags |= MS_RDONLY;
1014                         continue;
1015                 }
1016                 if (!strcmp(line,"rw")) {
1017                         root_mountflags &= ~MS_RDONLY;
1018                         continue;
1019                 }
1020                 if (!strcmp(line,"debug")) {
1021                         console_loglevel = 10;
1022                         continue;
1023                 }
1024                 if (!strncmp(line,"init=",5)) {
1025                         line += 5;
1026                         execute_command = line;
1027                         /* In case LILO is going to boot us with default command line,
1028                          * it prepends "auto" before the whole cmdline which makes
1029                          * the shell think it should execute a script with such name.
1030                          * So we ignore all arguments entered _before_ init=... [MJ]
1031                          */
1032                         args = 0;
1033                         continue;
1034                 }
1035                 if (checksetup(line))
1036                         continue;
1037
1038                 /*
1039                  * Then check if it's an environment variable or
1040                  * an option.
1041                  */
1042                 if (strchr(line,'=')) {
1043                         if (envs >= MAX_INIT_ENVS)
1044                                 break;
1045                         envp_init[++envs] = line;
1046                 } else {
1047                         if (args >= MAX_INIT_ARGS)
1048                                 break;
1049                         argv_init[++args] = line;
1050                 }
1051         }
1052         argv_init[args+1] = NULL;
1053         envp_init[envs+1] = NULL;
1054 }
1055
1056
1057 extern void setup_arch(char **, unsigned long *, unsigned long *);
1058
1059 #ifndef __SMP__
1060
1061 /*
1062  *      Uniprocessor idle thread
1063  */
1064
1065 int cpu_idle(void *unused)
1066 {
1067         for(;;)
1068                 idle();
1069 }
1070
1071 #define smp_init()      do { } while (0)
1072
1073 #else
1074
1075 /*
1076  *      Multiprocessor idle thread is in arch/...
1077  */
1078
1079 extern int cpu_idle(void * unused);
1080
1081 /* Called by boot processor to activate the rest. */
1082 static void __init smp_init(void)
1083 {
1084         /* Get other processors into their bootup holding patterns. */
1085         smp_boot_cpus();
1086         smp_threads_ready=1;
1087         smp_commence();
1088 }
1089
1090 #endif
1091
1092 extern void initialize_secondary(void);
1093
1094 /*
1095  *      Activate the first processor.
1096  */
1097
1098 asmlinkage void __init start_kernel(void)
1099 {
1100         char * command_line;
1101
1102 #ifdef __SMP__
1103         static int boot_cpu = 1;
1104         /* "current" has been set up, we need to load it now */
1105         if (!boot_cpu)
1106                 initialize_secondary();
1107         boot_cpu = 0;
1108 #endif
1109
1110 /*
1111  * Interrupts are still disabled. Do necessary setups, then
1112  * enable them
1113  */
1114         printk(linux_banner);
1115         setup_arch(&command_line, &memory_start, &memory_end);
1116         memory_start = paging_init(memory_start,memory_end);
1117         trap_init();
1118         init_IRQ();
1119         sched_init();
1120         time_init();
1121         parse_options(command_line);
1122
1123         /*
1124          * HACK ALERT! This is early. We're enabling the console before
1125          * we've done PCI setups etc, and console_init() must be aware of
1126          * this. But we do want output early, in case something goes wrong.
1127          */
1128         memory_start = console_init(memory_start,memory_end);
1129 #ifdef CONFIG_MODULES
1130         init_modules();
1131 #endif
1132         if (prof_shift) {
1133                 prof_buffer = (unsigned int *) memory_start;
1134                 /* only text is profiled */
1135                 prof_len = (unsigned long) &_etext - (unsigned long) &_stext;
1136                 prof_len >>= prof_shift;
1137                 memory_start += prof_len * sizeof(unsigned int);
1138                 memset(prof_buffer, 0, prof_len * sizeof(unsigned int));
1139         }
1140
1141         memory_start = kmem_cache_init(memory_start, memory_end);
1142         sti();
1143         calibrate_delay();
1144 #ifdef CONFIG_BLK_DEV_INITRD
1145         if (initrd_start && !initrd_below_start_ok && initrd_start < memory_start) {
1146                 printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
1147                     "disabling it.\n",initrd_start,memory_start);
1148                 initrd_start = 0;
1149         }
1150 #endif
1151         mem_init(memory_start,memory_end);
1152         kmem_cache_sizes_init();
1153 #ifdef CONFIG_PROC_FS
1154         proc_root_init();
1155 #endif
1156         uidcache_init();
1157         filescache_init();
1158         dcache_init();
1159         vma_init();
1160         buffer_init();
1161         signals_init();
1162         inode_init();
1163         file_table_init();
1164 #if defined(CONFIG_SYSVIPC)
1165         ipc_init();
1166 #endif
1167 #if defined(CONFIG_QUOTA)
1168         dquot_init_hash();
1169 #endif
1170         check_bugs();
1171         printk("POSIX conformance testing by UNIFIX\n");
1172
1173         /*
1174          *      We count on the initial thread going ok
1175          *      Like idlers init is an unlocked kernel thread, which will
1176          *      make syscalls (and thus be locked).
1177          */
1178         smp_init();
1179         kernel_thread(init, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1180         current->need_resched = 1;
1181         cpu_idle(NULL);
1182 }
1183
1184 #ifdef CONFIG_BLK_DEV_INITRD
1185 static int do_linuxrc(void * shell)
1186 {
1187         static char *argv[] = { "linuxrc", NULL, };
1188
1189         close(0);close(1);close(2);
1190         setsid();
1191         (void) open("/dev/console",O_RDWR,0);
1192         (void) dup(0);
1193         (void) dup(0);
1194         return execve(shell, argv, envp_init);
1195 }
1196
1197 static void __init no_initrd(char *s,int *ints)
1198 {
1199         mount_initrd = 0;
1200 }
1201 #endif
1202
1203 struct task_struct *child_reaper = &init_task;
1204
1205 /*
1206  * Ok, the machine is now initialized. None of the devices
1207  * have been touched yet, but the CPU subsystem is up and
1208  * running, and memory and process management works.
1209  *
1210  * Now we can finally start doing some real work..
1211  */
1212 static void __init do_basic_setup(void)
1213 {
1214 #ifdef CONFIG_BLK_DEV_INITRD
1215         int real_root_mountflags;
1216 #endif
1217
1218         /*
1219          * Tell the world that we're going to be the grim
1220          * reaper of innocent orphaned children.
1221          *
1222          * We don't want people to have to make incorrect
1223          * assumptions about where in the task array this
1224          * can be found.
1225          */
1226         child_reaper = current;
1227
1228 #if defined(CONFIG_MTRR)        /* Do this after SMP initialization */
1229 /*
1230  * We should probably create some architecture-dependent "fixup after
1231  * everything is up" style function where this would belong better
1232  * than in init/main.c..
1233  */
1234         mtrr_init();
1235 #endif
1236
1237 #ifdef CONFIG_SYSCTL
1238         sysctl_init();
1239 #endif
1240
1241         /*
1242          * Ok, at this point all CPU's should be initialized, so
1243          * we can start looking into devices..
1244          */
1245 #ifdef CONFIG_PCI
1246         pci_init();
1247 #endif
1248 #ifdef CONFIG_SBUS
1249         sbus_init();
1250 #endif
1251 #if defined(CONFIG_PPC)
1252         powermac_init();
1253 #endif
1254 #ifdef CONFIG_MCA
1255         mca_init();
1256 #endif
1257 #ifdef CONFIG_ARCH_ACORN
1258         ecard_init();
1259 #endif
1260 #ifdef CONFIG_ZORRO
1261         zorro_init();
1262 #endif
1263 #ifdef CONFIG_DIO
1264         dio_init();
1265 #endif
1266
1267         /* Networking initialization needs a process context */
1268         sock_init();
1269
1270         /* Launch bdflush from here, instead of the old syscall way. */
1271         kernel_thread(bdflush, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1272         /* Start the background pageout daemon. */
1273         kswapd_setup();
1274         kernel_thread(kswapd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1275
1276 #if CONFIG_AP1000
1277         /* Start the async paging daemon. */
1278         {
1279           extern int asyncd(void *);
1280           kernel_thread(asyncd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1281         }
1282 #endif
1283
1284 #ifdef CONFIG_BLK_DEV_INITRD
1285
1286         real_root_dev = ROOT_DEV;
1287         real_root_mountflags = root_mountflags;
1288         if (initrd_start && mount_initrd) root_mountflags &= ~MS_RDONLY;
1289         else mount_initrd =0;
1290 #endif
1291
1292         /* Set up devices .. */
1293         device_setup();
1294
1295         /* .. executable formats .. */
1296         binfmt_setup();
1297
1298         /* .. filesystems .. */
1299         filesystem_setup();
1300
1301         /* Mount the root filesystem.. */
1302         mount_root();
1303
1304 #ifdef CONFIG_UMSDOS_FS
1305         {
1306                 /*
1307                         When mounting a umsdos fs as root, we detect
1308                         the pseudo_root (/linux) and initialise it here.
1309                         pseudo_root is defined in fs/umsdos/inode.c
1310                 */
1311                 extern struct inode *pseudo_root;
1312                 if (pseudo_root != NULL){
1313                         current->fs->root = pseudo_root->i_sb->s_root;
1314                         current->fs->pwd  = pseudo_root->i_sb->s_root;
1315                 }
1316         }
1317 #endif
1318
1319 #ifdef CONFIG_BLK_DEV_INITRD
1320         root_mountflags = real_root_mountflags;
1321         if (mount_initrd && ROOT_DEV != real_root_dev
1322             && MAJOR(ROOT_DEV) == RAMDISK_MAJOR && MINOR(ROOT_DEV) == 0) {
1323                 int error;
1324                 int i, pid;
1325
1326                 pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
1327                 if (pid>0)
1328                         while (pid != wait(&i));
1329                 if (MAJOR(real_root_dev) != RAMDISK_MAJOR
1330                      || MINOR(real_root_dev) != 0) {
1331                         error = change_root(real_root_dev,"/initrd");
1332                         if (error)
1333                                 printk(KERN_ERR "Change root to /initrd: "
1334                                     "error %d\n",error);
1335                 }
1336         }
1337 #endif
1338 }
1339
1340 static int init(void * unused)
1341 {
1342         lock_kernel();
1343         do_basic_setup();
1344
1345         /*
1346          * Ok, we have completed the initial bootup, and
1347          * we're essentially up and running. Get rid of the
1348          * initmem segments and start the user-mode stuff..
1349          */
1350         free_initmem();
1351         unlock_kernel();
1352
1353         if (open("/dev/console", O_RDWR, 0) < 0)
1354                 printk("Warning: unable to open an initial console.\n");
1355
1356         (void) dup(0);
1357         (void) dup(0);
1358
1359         /*
1360          * We try each of these until one succeeds.
1361          *
1362          * The Bourne shell can be used instead of init if we are
1363          * trying to recover a really broken machine.
1364          */
1365
1366         if (execute_command)
1367                 execve(execute_command,argv_init,envp_init);
1368         execve("/sbin/init",argv_init,envp_init);
1369         execve("/etc/init",argv_init,envp_init);
1370         execve("/bin/init",argv_init,envp_init);
1371         execve("/bin/sh",argv_init,envp_init);
1372         panic("No init found.  Try passing init= option to kernel.");
1373 }