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/string.h>
  18 #include <linux/ctype.h>
  19 #include <linux/delay.h>
  20 #include <linux/utsname.h>
  21 #include <linux/ioport.h>
  22 #include <linux/init.h>
  23 #include <linux/smp_lock.h>
  24 #include <linux/blk.h>
  25 #include <linux/hdreg.h>
  26 #include <linux/iobuf.h>
  27
  28 #include <asm/io.h>
  29 #include <asm/bugs.h>
  30
  31 #ifdef CONFIG_PCI
  32 #include <linux/pci.h>
  33 #endif
  34
  35 #ifdef CONFIG_DIO
  36 #include <linux/dio.h>
  37 #endif
  38
  39 #ifdef CONFIG_ZORRO
  40 #include <linux/zorro.h>
  41 #endif
  42
  43 #ifdef CONFIG_MTRR
  44 #  include <asm/mtrr.h>
  45 #endif
  46
  47 #ifdef CONFIG_APM
  48 #include <linux/apm_bios.h>
  49 #endif
  50
  51 #ifdef CONFIG_MAC
  52 extern void nubus_init(void);
  53 #endif
  54
  55 /*
  56  * Versions of gcc older than that listed below may actually compile
  57  * and link okay, but the end product can have subtle run time bugs.
  58  * To avoid associated bogus bug reports, we flatly refuse to compile
  59  * with a gcc that is known to be too old from the very beginning.
  60  */
  61 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
  62 #error sorry, your GCC is too old. It builds incorrect kernels.
  63 #endif
  64
  65 extern char _stext, _etext;
  66 extern char *linux_banner;
  67
  68 extern int console_loglevel;
  69
  70 static int init(void *);
  71 extern int bdflush(void *);
  72 extern int kswapd(void *);
  73 extern void kswapd_setup(void);
  74
  75 extern void init_IRQ(void);
  76 extern void init_modules(void);
  77 extern long console_init(long, long);
  78 extern void sock_init(void);
  79 extern void fork_init(unsigned long);
  80 extern void mca_init(void);
  81 extern void sbus_init(void);
  82 extern void ppc_init(void);
  83 extern void sysctl_init(void);
  84 extern void filescache_init(void);
  85 extern void signals_init(void);
  86
  87 extern void device_setup(void);
  88 extern void binfmt_setup(void);
  89 extern void free_initmem(void);
  90 extern void filesystem_setup(void);
  91
  92 #ifdef CONFIG_ARCH_ACORN
  93 extern void ecard_init(void);
  94 #endif
  95
  96 extern void smp_setup(char *str, int *ints);
  97 #ifdef __i386__
  98 extern void ioapic_pirq_setup(char *str, int *ints);
  99 extern void ioapic_setup(char *str, int *ints);
 100 #endif
 101 extern void no_scroll(char *str, int *ints);
 102 extern void kbd_reset_setup(char *str, int *ints);
 103 extern void panic_setup(char *str, int *ints);
 104 extern void bmouse_setup(char *str, int *ints);
 105 extern void msmouse_setup(char *str, int *ints);
 106 extern void console_setup(char *str, int *ints);
 107 #ifdef CONFIG_PRINTER
 108 extern void lp_setup(char *str, int *ints);
 109 #endif
 110 #ifdef CONFIG_JOY_AMIGA
 111 extern void js_am_setup(char *str, int *ints);
 112 #endif
 113 #ifdef CONFIG_JOY_ANALOG
 114 extern void js_an_setup(char *str, int *ints);
 115 #endif
 116 #ifdef CONFIG_JOY_ASSASIN
 117 extern void js_as_setup(char *str, int *ints);
 118 #endif
 119 #ifdef CONFIG_JOY_CONSOLE
 120 extern void js_console_setup(char *str, int *ints);
 121 #endif
 122 #ifdef CONFIG_JOY_DB9
 123 extern void js_db9_setup(char *str, int *ints);
 124 #endif
 125 #ifdef CONFIG_JOY_TURBOGRAFX
 126 extern void js_tg_setup(char *str, int *ints);
 127 #endif
 128 #ifdef CONFIG_JOY_LIGHTNING
 129 extern void js_l4_setup(char *str, int *ints);
 130 #endif
 131 extern void eth_setup(char *str, int *ints);
 132 #ifdef CONFIG_ARCNET_COM20020
 133 extern void com20020_setup(char *str, int *ints);
 134 #endif
 135 #ifdef CONFIG_ARCNET_RIM_I
 136 extern void arcrimi_setup(char *str, int *ints);
 137 #endif
 138 #ifdef CONFIG_ARCNET_COM90xxIO
 139 extern void com90io_setup(char *str, int *ints);
 140 #endif
 141 #ifdef CONFIG_ARCNET_COM90xx
 142 extern void com90xx_setup(char *str, int *ints);
 143 #endif
 144 #ifdef CONFIG_DECNET
 145 extern void decnet_setup(char *str, int *ints);
 146 #endif
 147 #ifdef CONFIG_BLK_DEV_XD
 148 extern void xd_setup(char *str, int *ints);
 149 extern void xd_manual_geo_init(char *str, int *ints);
 150 #endif
 151 #ifdef CONFIG_BLK_DEV_IDE
 152 extern void ide_setup(char *);
 153 #endif
 154 #ifdef CONFIG_PARIDE_PD
 155 extern void pd_setup(char *str, int *ints);
 156 #endif
 157 #ifdef CONFIG_PARIDE_PF
 158 extern void pf_setup(char *str, int *ints);
 159 #endif
 160 #ifdef CONFIG_PARIDE_PT
 161 extern void pt_setup(char *str, int *ints);
 162 #endif
 163 #ifdef CONFIG_PARIDE_PG
 164 extern void pg_setup(char *str, int *ints);
 165 #endif
 166 #ifdef CONFIG_PARIDE_PCD
 167 extern void pcd_setup(char *str, int *ints);
 168 #endif
 169 extern void floppy_setup(char *str, int *ints);
 170 extern void st_setup(char *str, int *ints);
 171 extern void st0x_setup(char *str, int *ints);
 172 extern void advansys_setup(char *str, int *ints);
 173 extern void tmc8xx_setup(char *str, int *ints);
 174 extern void t128_setup(char *str, int *ints);
 175 extern void pas16_setup(char *str, int *ints);
 176 extern void generic_NCR5380_setup(char *str, int *intr);
 177 extern void generic_NCR53C400_setup(char *str, int *intr);
 178 extern void generic_NCR53C400A_setup(char *str, int *intr);
 179 extern void generic_DTC3181E_setup(char *str, int *intr);
 180 extern void aha152x_setup(char *str, int *ints);
 181 extern void aha1542_setup(char *str, int *ints);
 182 extern void gdth_setup(char *str, int *ints);
 183 extern void aic7xxx_setup(char *str, int *ints);
 184 extern void AM53C974_setup(char *str, int *ints);
 185 extern void BusLogic_Setup(char *str, int *ints);
 186 extern void ncr53c8xx_setup(char *str, int *ints);
 187 extern void sym53c8xx_setup(char *str, int *ints);
 188 extern void eata2x_setup(char *str, int *ints);
 189 extern void u14_34f_setup(char *str, int *ints);
 190 extern void fdomain_setup(char *str, int *ints);
 191 extern void ibmmca_scsi_setup(char *str, int *ints);
 192 extern void fd_mcs_setup(char *str, int *ints);
 193 extern void in2000_setup(char *str, int *ints);
 194 extern void NCR53c406a_setup(char *str, int *ints);
 195 extern void sym53c416_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 #ifdef CONFIG_LTPC
 334 extern void ltpc_setup(char *str, int *ints);
 335 #endif
 336 #ifdef CONFIG_BLK_CPQ_DA
 337 extern void cpqarray_setup(char *str, int *ints);
 338 #endif
 339
 340 #if defined(CONFIG_SYSVIPC)
 341 extern void ipc_init(void);
 342 #endif
 343 #if defined(CONFIG_QUOTA)
 344 extern void dquot_init_hash(void);
 345 #endif
 346
 347 #ifdef CONFIG_MD_BOOT
 348 extern void md_setup(char *str,int *ints) __init;
 349 #endif
 350
 351 /*
 352  * Boot command-line arguments
 353  */
 354 #define MAX_INIT_ARGS 8
 355 #define MAX_INIT_ENVS 8
 356
 357 extern void time_init(void);
 358
 359 static unsigned long memory_start = 0;
 360 static unsigned long memory_end = 0;
 361
 362 int rows, cols;
 363
 364 #ifdef CONFIG_BLK_DEV_RAM
 365 extern int rd_doload;           /* 1 = load ramdisk, 0 = don't load 2 = dual disk */
 366 extern int rd_prompt;           /* 1 = prompt for ramdisk, 0 = don't prompt */
 367 extern int rd_size;             /* Size of the ramdisk(s) */
 368 extern int rd_image_start;      /* starting block # of image */
 369 #ifdef CONFIG_BLK_DEV_INITRD
 370 kdev_t real_root_dev;
 371 #endif
 372 #endif
 373
 374 int root_mountflags = MS_RDONLY;
 375 char *execute_command = NULL;
 376
 377 static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
 378 static char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
 379
 380 char *get_options(char *str, int *ints)
 381 {
 382         char *cur = str;
 383         int i=1;
 384
 385         while (cur && (*cur=='-' || isdigit(*cur)) && i <= 10) {
 386                 ints[i++] = simple_strtol(cur,NULL,0);
 387                 if ((cur = strchr(cur,',')) != NULL)
 388                         cur++;
 389         }
 390         ints[0] = i-1;
 391         return(cur);
 392 }
 393
 394 static void __init profile_setup(char *str, int *ints)
 395 {
 396         if (ints[0] > 0)
 397                 prof_shift = (unsigned long) ints[1];
 398         else
 399                 prof_shift = 2;
 400 }
 401
 402
 403 static struct dev_name_struct {
 404         const char *name;
 405         const int num;
 406 } root_dev_names[] __initdata = {
 407 #ifdef CONFIG_ROOT_NFS
 408         { "nfs",     0x00ff },
 409 #endif
 410 #ifdef CONFIG_BLK_DEV_IDE
 411         { "hda",     0x0300 },
 412         { "hdb",     0x0340 },
 413         { "hdc",     0x1600 },
 414         { "hdd",     0x1640 },
 415         { "hde",     0x2100 },
 416         { "hdf",     0x2140 },
 417         { "hdg",     0x2200 },
 418         { "hdh",     0x2240 },
 419         { "hdi",     0x3800 },
 420         { "hdj",     0x3840 },
 421         { "hdk",     0x3900 },
 422         { "hdl",     0x3940 },
 423         { "hdm",     0x5800 },
 424         { "hdn",     0x5840 },
 425         { "hdo",     0x5900 },
 426         { "hdp",     0x5940 },
 427 #endif
 428 #ifdef CONFIG_BLK_DEV_SD
 429         { "sda",     0x0800 },
 430         { "sdb",     0x0810 },
 431         { "sdc",     0x0820 },
 432         { "sdd",     0x0830 },
 433         { "sde",     0x0840 },
 434         { "sdf",     0x0850 },
 435         { "sdg",     0x0860 },
 436         { "sdh",     0x0870 },
 437         { "sdi",     0x0880 },
 438         { "sdj",     0x0890 },
 439         { "sdk",     0x08a0 },
 440         { "sdl",     0x08b0 },
 441         { "sdm",     0x08c0 },
 442         { "sdn",     0x08d0 },
 443         { "sdo",     0x08e0 },
 444         { "sdp",     0x08f0 },
 445 #endif
 446 #ifdef CONFIG_ATARI_ACSI
 447         { "ada",     0x1c00 },
 448         { "adb",     0x1c10 },
 449         { "adc",     0x1c20 },
 450         { "add",     0x1c30 },
 451         { "ade",     0x1c40 },
 452 #endif
 453 #ifdef CONFIG_BLK_DEV_FD
 454         { "fd",      0x0200 },
 455 #endif
 456 #ifdef CONFIG_MD_BOOT
 457         { "md",      0x0900 },
 458 #endif
 459 #ifdef CONFIG_BLK_DEV_XD
 460         { "xda",     0x0d00 },
 461         { "xdb",     0x0d40 },
 462 #endif
 463 #ifdef CONFIG_BLK_DEV_RAM
 464         { "ram",     0x0100 },
 465 #endif
 466 #ifdef CONFIG_BLK_DEV_SR
 467         { "scd",     0x0b00 },
 468 #endif
 469 #ifdef CONFIG_MCD
 470         { "mcd",     0x1700 },
 471 #endif
 472 #ifdef CONFIG_CDU535
 473         { "cdu535",  0x1800 },
 474         { "sonycd",  0x1800 },
 475 #endif
 476 #ifdef CONFIG_AZTCD
 477         { "aztcd",   0x1d00 },
 478 #endif
 479 #ifdef CONFIG_CM206
 480         { "cm206cd", 0x2000 },
 481 #endif
 482 #ifdef CONFIG_GSCD
 483         { "gscd",    0x1000 },
 484 #endif
 485 #ifdef CONFIG_SBPCD
 486         { "sbpcd",   0x1900 },
 487 #endif
 488 #ifdef CONFIG_BLK_DEV_PS2
 489         { "eda",     0x2400 },
 490         { "edb",     0x2440 },
 491 #endif
 492 #ifdef CONFIG_PARIDE_PD
 493         { "pda",        0x2d00 },
 494         { "pdb",        0x2d10 },
 495         { "pdc",        0x2d20 },
 496         { "pdd",        0x2d30 },
 497 #endif
 498 #ifdef CONFIG_PARIDE_PCD
 499         { "pcd",        0x2e00 },
 500 #endif
 501 #ifdef CONFIG_PARIDE_PF
 502         { "pf",         0x2f00 },
 503 #endif
 504 #if CONFIG_APBLOCK
 505         { "apblock", APBLOCK_MAJOR << 8},
 506 #endif
 507 #if CONFIG_DDV
 508         { "ddv", DDV_MAJOR << 8},
 509 #endif
 510         { NULL, 0 }
 511 };
 512
 513 kdev_t __init name_to_kdev_t(char *line)
 514 {
 515         int base = 0;
 516         if (strncmp(line,"/dev/",5) == 0) {
 517                 struct dev_name_struct *dev = root_dev_names;
 518                 line += 5;
 519                 do {
 520                         int len = strlen(dev->name);
 521                         if (strncmp(line,dev->name,len) == 0) {
 522                                 line += len;
 523                                 base = dev->num;
 524                                 break;
 525                         }
 526                         dev++;
 527                 } while (dev->name);
 528         }
 529         return to_kdev_t(base + simple_strtoul(line,NULL,base?10:16));
 530 }
 531
 532 static void __init root_dev_setup(char *line, int *num)
 533 {
 534         ROOT_DEV = name_to_kdev_t(line);
 535 }
 536
 537 /*
 538  * List of kernel command line parameters. The first table lists parameters
 539  * which are subject to values parsing (leading numbers are converted to
 540  * an array of ints and chopped off the string), the second table contains
 541  * the few exceptions which obey their own syntax rules.
 542  */
 543
 544 struct kernel_param {
 545         const char *str;
 546         void (*setup_func)(char *, int *);
 547 };
 548
 549 static struct kernel_param cooked_params[] __initdata = {
 550 /* FIXME: make PNP just become reserve_setup */
 551 #ifndef CONFIG_KERNEL_PNP_RESOURCE
 552         { "reserve=", reserve_setup },
 553 #else
 554         { "reserve=", pnp_reserve_setup },
 555 #endif
 556         { "profile=", profile_setup },
 557 #ifdef __SMP__
 558         { "nosmp", smp_setup },
 559         { "maxcpus=", smp_setup },
 560 #ifdef CONFIG_X86_IO_APIC
 561         { "noapic", ioapic_setup },
 562         { "pirq=", ioapic_pirq_setup },
 563 #endif
 564 #endif
 565 #ifdef CONFIG_BLK_DEV_RAM
 566         { "ramdisk_start=", ramdisk_start_setup },
 567         { "load_ramdisk=", load_ramdisk },
 568         { "prompt_ramdisk=", prompt_ramdisk },
 569         { "ramdisk=", ramdisk_size },
 570         { "ramdisk_size=", ramdisk_size },
 571 #ifdef CONFIG_BLK_DEV_INITRD
 572         { "noinitrd", no_initrd },
 573 #endif
 574 #endif
 575 #ifdef CONFIG_FB
 576         { "video=", video_setup },
 577 #endif
 578         { "panic=", panic_setup },
 579         { "console=", console_setup },
 580 #ifdef CONFIG_VGA_CONSOLE
 581         { "no-scroll", no_scroll },
 582 #endif
 583 #ifdef CONFIG_MDA_CONSOLE
 584         { "mdacon=", mdacon_setup },
 585 #endif
 586 #ifdef CONFIG_VT
 587         { "kbd-reset", kbd_reset_setup },
 588 #endif
 589 #ifdef CONFIG_BUGi386
 590         { "no-hlt", no_halt },
 591         { "no387", no_387 },
 592         { "reboot=", reboot_setup },
 593         { "mca-pentium", mca_pentium },
 594 #endif
 595 #ifdef CONFIG_INET
 596         { "ether=", eth_setup },
 597 #endif
 598 #ifdef CONFIG_ARCNET_COM20020
 599         { "com20020=", com20020_setup },
 600 #endif
 601 #ifdef CONFIG_ARCNET_RIM_I
 602         { "arcrimi=", arcrimi_setup },
 603 #endif
 604 #ifdef CONFIG_ARCNET_COM90xxIO
 605         { "com90io=", com90io_setup },
 606 #endif
 607 #ifdef CONFIG_ARCNET_COM90xx
 608         { "com90xx=", com90xx_setup },
 609 #endif
 610 #ifdef CONFIG_DECNET
 611         { "decnet=", decnet_setup },
 612 #endif
 613 #ifdef CONFIG_PRINTER
 614         { "lp=", lp_setup },
 615 #endif
 616 #ifdef CONFIG_JOY_AMIGA
 617         { "js_am=", js_am_setup },
 618 #endif
 619 #ifdef CONFIG_JOY_ANALOG
 620         { "js_an=", js_an_setup },
 621 #endif
 622 #ifdef CONFIG_JOY_ASSASIN
 623         { "js_as=", js_as_setup },
 624 #endif
 625 #ifdef CONFIG_JOY_CONSOLE
 626         { "js_console=", js_console_setup },
 627         { "js_console2=", js_console_setup },
 628         { "js_console3=", js_console_setup },
 629 #endif
 630 #ifdef CONFIG_JOY_DB9
 631         { "js_db9=", js_db9_setup },
 632         { "js_db9_2=", js_db9_setup },
 633         { "js_db9_3=", js_db9_setup },
 634 #endif
 635 #ifdef CONFIG_JOY_TURBOGRAFX
 636         { "js_tg=", js_tg_setup },
 637         { "js_tg_2=", js_tg_setup },
 638         { "js_tg_3=", js_tg_setup },
 639 #endif
 640 #ifdef CONFIG_SCSI
 641         { "max_scsi_luns=", scsi_luns_setup },
 642         { "scsi_logging=", scsi_logging_setup },
 643 #endif
 644 #ifdef CONFIG_JOY_LIGHTNING
 645         { "js_l4=", js_l4_setup },
 646 #endif
 647 #ifdef CONFIG_SCSI_ADVANSYS
 648         { "advansys=", advansys_setup },
 649 #endif
 650 #if defined(CONFIG_BLK_DEV_HD)
 651         { "hd=", hd_setup },
 652 #endif
 653 #ifdef CONFIG_CHR_DEV_ST
 654         { "st=", st_setup },
 655 #endif
 656 #ifdef CONFIG_BUSMOUSE
 657         { "bmouse=", bmouse_setup },
 658 #endif
 659 #ifdef CONFIG_MS_BUSMOUSE
 660         { "msmouse=", msmouse_setup },
 661 #endif
 662 #ifdef CONFIG_SCSI_SEAGATE
 663         { "st0x=", st0x_setup },
 664         { "tmc8xx=", tmc8xx_setup },
 665 #endif
 666 #ifdef CONFIG_SCSI_T128
 667         { "t128=", t128_setup },
 668 #endif
 669 #ifdef CONFIG_SCSI_PAS16
 670         { "pas16=", pas16_setup },
 671 #endif
 672 #ifdef CONFIG_SCSI_GENERIC_NCR5380
 673         { "ncr5380=", generic_NCR5380_setup },
 674         { "ncr53c400=", generic_NCR53C400_setup },
 675         { "ncr53c400a=", generic_NCR53C400A_setup },
 676         { "dtc3181e=", generic_DTC3181E_setup },
 677 #endif
 678 #ifdef CONFIG_SCSI_AHA152X
 679         { "aha152x=", aha152x_setup},
 680 #endif
 681 #ifdef CONFIG_SCSI_AHA1542
 682         { "aha1542=", aha1542_setup},
 683 #endif
 684 #ifdef CONFIG_SCSI_GDTH
 685         { "gdth=", gdth_setup},
 686 #endif
 687 #ifdef CONFIG_SCSI_AIC7XXX
 688         { "aic7xxx=", aic7xxx_setup},
 689 #endif
 690 #ifdef CONFIG_SCSI_BUSLOGIC
 691         { "BusLogic=", BusLogic_Setup},
 692 #endif
 693 #ifdef CONFIG_SCSI_NCR53C8XX
 694         { "ncr53c8xx=", ncr53c8xx_setup},
 695 #endif
 696 #ifdef CONFIG_SCSI_SYM53C8XX
 697         { "sym53c8xx=", sym53c8xx_setup},
 698 #endif
 699 #ifdef CONFIG_SCSI_EATA
 700         { "eata=", eata2x_setup},
 701 #endif
 702 #ifdef CONFIG_SCSI_U14_34F
 703         { "u14-34f=", u14_34f_setup},
 704 #endif
 705 #ifdef CONFIG_SCSI_AM53C974
 706         { "AM53C974=", AM53C974_setup},
 707 #endif
 708 #ifdef CONFIG_SCSI_NCR53C406A
 709         { "ncr53c406a=", NCR53c406a_setup},
 710 #endif
 711 #ifdef CONFIG_SCSI_SYM53C416
 712         { "sym53c416=", sym53c416_setup},
 713 #endif
 714 #ifdef CONFIG_SCSI_FUTURE_DOMAIN
 715         { "fdomain=", fdomain_setup},
 716 #endif
 717 #ifdef CONFIG_SCSI_IN2000
 718         { "in2000=", in2000_setup},
 719 #endif
 720 #ifdef CONFIG_SCSI_7000FASST
 721         { "wd7000=", wd7000_setup},
 722 #endif
 723 #ifdef CONFIG_SCSI_IBMMCA
 724         { "ibmmcascsi=", ibmmca_scsi_setup },
 725 #endif
 726 #ifdef CONFIG_SCSI_FD_MCS
 727         { "fd_mcs=", fd_mcs_setup },
 728 #endif
 729 #if defined(CONFIG_SCSI_DC390T) && ! defined(CONFIG_SCSI_DC390T_NOGENSUPP)
 730         { "tmscsim=", dc390_setup },
 731 #endif
 732 #ifdef CONFIG_BLK_DEV_XD
 733         { "xd=", xd_setup },
 734         { "xd_geo=", xd_manual_geo_init },
 735 #endif
 736 #if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
 737         { "floppy=", floppy_setup },
 738 #endif
 739 #ifdef CONFIG_BLK_DEV_PS2
 740         { "eda=", ed_setup },
 741         { "edb=", ed_setup },
 742         { "tp720=", tp720_setup },
 743 #endif
 744 #ifdef CONFIG_CDU31A
 745         { "cdu31a=", cdu31a_setup },
 746 #endif CONFIG_CDU31A
 747 #ifdef CONFIG_MCD
 748         { "mcd=", mcd_setup },
 749 #endif CONFIG_MCD
 750 #ifdef CONFIG_MCDX
 751         { "mcdx=", mcdx_setup },
 752 #endif CONFIG_MCDX
 753 #ifdef CONFIG_SBPCD
 754         { "sbpcd=", sbpcd_setup },
 755 #endif CONFIG_SBPCD
 756 #ifdef CONFIG_AZTCD
 757         { "aztcd=", aztcd_setup },
 758 #endif CONFIG_AZTCD
 759 #ifdef CONFIG_CDU535
 760         { "sonycd535=", sonycd535_setup },
 761 #endif CONFIG_CDU535
 762 #ifdef CONFIG_GSCD
 763         { "gscd=", gscd_setup },
 764 #endif CONFIG_GSCD
 765 #ifdef CONFIG_CM206
 766         { "cm206=", cm206_setup },
 767 #endif CONFIG_CM206
 768 #ifdef CONFIG_OPTCD
 769         { "optcd=", optcd_setup },
 770 #endif CONFIG_OPTCD
 771 #ifdef CONFIG_SJCD
 772         { "sjcd=", sjcd_setup },
 773 #endif CONFIG_SJCD
 774 #ifdef CONFIG_ISP16_CDI
 775         { "isp16=", isp16_setup },
 776 #endif CONFIG_ISP16_CDI
 777 #ifdef CONFIG_SOUND_OSS
 778         { "sound=", sound_setup },
 779 #endif
 780 #ifdef CONFIG_ISDN_DRV_ICN
 781         { "icn=", icn_setup },
 782 #endif
 783 #ifdef CONFIG_ISDN_DRV_HISAX
 784        { "hisax=", HiSax_setup },
 785        { "HiSax=", HiSax_setup },
 786 #endif
 787 #ifdef CONFIG_ISDN_DRV_PCBIT
 788         { "pcbit=", pcbit_setup },
 789 #endif
 790 #ifdef CONFIG_ATARIMOUSE
 791         { "atamouse=", atari_mouse_setup },
 792 #endif
 793 #ifdef CONFIG_DMASOUND
 794         { "dmasound=", dmasound_setup },
 795 #endif
 796 #ifdef CONFIG_ATARI_SCSI
 797         { "atascsi=", atari_scsi_setup },
 798 #endif
 799 #ifdef CONFIG_STRAM_SWAP
 800         { "stram_swap=", stram_swap_setup },
 801 #endif
 802 #if defined(CONFIG_A4000T_SCSI) || defined(CONFIG_WARPENGINE_SCSI) \
 803             || defined(CONFIG_A4091_SCSI) || defined(CONFIG_MVME16x_SCSI) \
 804             || defined(CONFIG_BVME6000_SCSI) \
 805             || defined(CONFIG_BLZ603EPLUS_SCSI)
 806         { "53c7xx=", ncr53c7xx_setup },
 807 #endif
 808 #if defined(CONFIG_A3000_SCSI) || defined(CONFIG_A2091_SCSI) \
 809             || defined(CONFIG_GVP11_SCSI)
 810         { "wd33c93=", wd33c93_setup },
 811 #endif
 812 #if defined(CONFIG_GVP11_SCSI)
 813         { "gvp11=", gvp11_setup },
 814 #endif
 815 #ifdef CONFIG_MAC_SCSI
 816         { "mac5380=", mac_scsi_setup },
 817 #endif
 818 #ifdef CONFIG_CYCLADES
 819         { "cyclades=", cy_setup },
 820 #endif
 821 #ifdef CONFIG_DIGI
 822         { "digi=", pcxx_setup },
 823 #endif
 824 #ifdef CONFIG_DIGIEPCA
 825         { "digiepca=", epca_setup },
 826 #endif
 827 #ifdef CONFIG_RISCOM8
 828         { "riscom8=", riscom8_setup },
 829 #endif
 830 #ifdef CONFIG_DMASCC
 831         { "dmascc=", dmascc_setup },
 832 #endif
 833 #ifdef CONFIG_SPECIALIX
 834         { "specialix=", specialix_setup },
 835 #endif
 836 #ifdef CONFIG_BAYCOM_PAR
 837         { "baycom_par=", baycom_par_setup },
 838 #endif
 839 #ifdef CONFIG_BAYCOM_SER_FDX
 840         { "baycom_ser_fdx=", baycom_ser_fdx_setup },
 841 #endif
 842 #ifdef CONFIG_BAYCOM_SER_HDX
 843         { "baycom_ser_hdx=", baycom_ser_hdx_setup },
 844 #endif
 845 #ifdef CONFIG_SOUNDMODEM
 846         { "soundmodem=", sm_setup },
 847 #endif
 848 #ifdef CONFIG_WDT
 849         { "wdt=", wdt_setup },
 850 #endif
 851 #ifdef CONFIG_PARPORT
 852         { "parport=", parport_setup },
 853 #endif
 854 #ifdef CONFIG_PLIP
 855         { "plip=", plip_setup },
 856 #endif
 857 #ifdef CONFIG_HFMODEM
 858         { "hfmodem=", hfmodem_setup },
 859 #endif
 860 #ifdef CONFIG_FTAPE
 861         { "ftape=", ftape_setup},
 862 #endif
 863 #ifdef CONFIG_MD_BOOT
 864         { "md=", md_setup},
 865 #endif
 866 #ifdef CONFIG_ADBMOUSE
 867         { "adb_buttons=", adb_mouse_setup },
 868 #endif
 869 #ifdef CONFIG_LTPC
 870         { "ltpc=", ltpc_setup },
 871 #endif
 872 #ifdef CONFIG_BLK_CPQ_DA
 873         { "smart2=", cpqarray_setup },
 874 #endif
 875         { 0, 0 }
 876 };
 877
 878 static struct kernel_param raw_params[] __initdata = {
 879         { "root=", root_dev_setup },
 880 #ifdef CONFIG_ROOT_NFS
 881         { "nfsroot=", nfs_root_setup },
 882         { "nfsaddrs=", ip_auto_config_setup },
 883 #endif
 884 #ifdef CONFIG_IP_PNP
 885         { "ip=", ip_auto_config_setup },
 886 #endif
 887 #ifdef CONFIG_PCI
 888         { "pci=", pci_setup },
 889 #endif
 890 #ifdef CONFIG_PARIDE_PD
 891         { "pd.", pd_setup },
 892 #endif
 893 #ifdef CONFIG_PARIDE_PCD
 894         { "pcd.", pcd_setup },
 895 #endif
 896 #ifdef CONFIG_PARIDE_PF
 897         { "pf.", pf_setup },
 898 #endif
 899 #ifdef CONFIG_PARIDE_PT
 900         { "pt.", pt_setup },
 901 #endif
 902 #ifdef CONFIG_PARIDE_PG
 903         { "pg.", pg_setup },
 904 #endif
 905 #ifdef CONFIG_APM
 906         { "apm=", apm_setup },
 907 #endif
 908         { 0, 0 }
 909 };
 910
 911 #ifdef CONFIG_BLK_DEV_RAM
 912 static void __init ramdisk_start_setup(char *str, int *ints)
 913 {
 914    if (ints[0] > 0 && ints[1] >= 0)
 915       rd_image_start = ints[1];
 916 }
 917
 918 static void __init load_ramdisk(char *str, int *ints)
 919 {
 920    if (ints[0] > 0 && ints[1] >= 0)
 921       rd_doload = ints[1] & 3;
 922 }
 923
 924 static void __init prompt_ramdisk(char *str, int *ints)
 925 {
 926    if (ints[0] > 0 && ints[1] >= 0)
 927       rd_prompt = ints[1] & 1;
 928 }
 929
 930 static void __init ramdisk_size(char *str, int *ints)
 931 {
 932         if (ints[0] > 0 && ints[1] >= 0)
 933                 rd_size = ints[1];
 934 }
 935 #endif
 936
 937 static int __init checksetup(char *line)
 938 {
 939         int i, ints[11];
 940
 941 #ifdef CONFIG_BLK_DEV_IDE
 942         /* ide driver needs the basic string, rather than pre-processed values */
 943         if (!strncmp(line,"ide",3) ||
 944 #ifdef CONFIG_BLK_DEV_VIA82C586
 945             !strncmp(line,"splitfifo",9) ||
 946 #endif /* CONFIG_BLK_DEV_VIA82C586 */
 947             (!strncmp(line,"hd",2) && line[2] != '=')) {
 948                 ide_setup(line);
 949                 return 1;
 950         }
 951 #endif
 952         for (i=0; raw_params[i].str; i++) {
 953                 int n = strlen(raw_params[i].str);
 954                 if (!strncmp(line,raw_params[i].str,n)) {
 955                         raw_params[i].setup_func(line+n, NULL);
 956                         return 1;
 957                 }
 958         }
 959         for (i=0; cooked_params[i].str; i++) {
 960                 int n = strlen(cooked_params[i].str);
 961                 if (!strncmp(line,cooked_params[i].str,n)) {
 962                         cooked_params[i].setup_func(get_options(line+n, ints), ints);
 963                         return 1;
 964                 }
 965         }
 966         return 0;
 967 }
 968
 969 /* this should be approx 2 Bo*oMips to start (note initial shift), and will
 970    still work even if initially too large, it will just take slightly longer */
 971 unsigned long loops_per_sec = (1<<12);
 972
 973 /* This is the number of bits of precision for the loops_per_second.  Each
 974    bit takes on average 1.5/HZ seconds.  This (like the original) is a little
 975    better than 1% */
 976 #define LPS_PREC 8
 977
 978 void __init calibrate_delay(void)
 979 {
 980         unsigned long ticks, loopbit;
 981         int lps_precision = LPS_PREC;
 982
 983         loops_per_sec = (1<<12);
 984
 985         printk("Calibrating delay loop... ");
 986         while (loops_per_sec <<= 1) {
 987                 /* wait for "start of" clock tick */
 988                 ticks = jiffies;
 989                 while (ticks == jiffies)
 990                         /* nothing */;
 991                 /* Go .. */
 992                 ticks = jiffies;
 993                 __delay(loops_per_sec);
 994                 ticks = jiffies - ticks;
 995                 if (ticks)
 996                         break;
 997         }
 998
 999 /* Do a binary approximation to get loops_per_second set to equal one clock
1000    (up to lps_precision bits) */
1001         loops_per_sec >>= 1;
1002         loopbit = loops_per_sec;
1003         while ( lps_precision-- && (loopbit >>= 1) ) {
1004                 loops_per_sec |= loopbit;
1005                 ticks = jiffies;
1006                 while (ticks == jiffies);
1007                 ticks = jiffies;
1008                 __delay(loops_per_sec);
1009                 if (jiffies != ticks)   /* longer than 1 tick */
1010                         loops_per_sec &= ~loopbit;
1011         }
1012
1013 /* finally, adjust loops per second in terms of seconds instead of clocks */
1014         loops_per_sec *= HZ;
1015 /* Round the value and print it */
1016         printk("%lu.%02lu BogoMIPS\n",
1017                 (loops_per_sec+2500)/500000,
1018                 ((loops_per_sec+2500)/5000) % 100);
1019 }
1020
1021 /*
1022  * This is a simple kernel command line parsing function: it parses
1023  * the command line, and fills in the arguments/environment to init
1024  * as appropriate. Any cmd-line option is taken to be an environment
1025  * variable if it contains the character '='.
1026  *
1027  * This routine also checks for options meant for the kernel.
1028  * These options are not given to init - they are for internal kernel use only.
1029  */
1030 static void __init parse_options(char *line)
1031 {
1032         char *next;
1033         int args, envs;
1034
1035         if (!*line)
1036                 return;
1037         args = 0;
1038         envs = 1;       /* TERM is set to 'linux' by default */
1039         next = line;
1040         while ((line = next) != NULL) {
1041                 if ((next = strchr(line,' ')) != NULL)
1042                         *next++ = 0;
1043                 /*
1044                  * check for kernel options first..
1045                  */
1046                 if (!strcmp(line,"ro")) {
1047                         root_mountflags |= MS_RDONLY;
1048                         continue;
1049                 }
1050                 if (!strcmp(line,"rw")) {
1051                         root_mountflags &= ~MS_RDONLY;
1052                         continue;
1053                 }
1054                 if (!strcmp(line,"debug")) {
1055                         console_loglevel = 10;
1056                         continue;
1057                 }
1058                 if (!strncmp(line,"init=",5)) {
1059                         line += 5;
1060                         execute_command = line;
1061                         /* In case LILO is going to boot us with default command line,
1062                          * it prepends "auto" before the whole cmdline which makes
1063                          * the shell think it should execute a script with such name.
1064                          * So we ignore all arguments entered _before_ init=... [MJ]
1065                          */
1066                         args = 0;
1067                         continue;
1068                 }
1069                 if (checksetup(line))
1070                         continue;
1071
1072                 /*
1073                  * Then check if it's an environment variable or
1074                  * an option.
1075                  */
1076                 if (strchr(line,'=')) {
1077                         if (envs >= MAX_INIT_ENVS)
1078                                 break;
1079                         envp_init[++envs] = line;
1080                 } else {
1081                         if (args >= MAX_INIT_ARGS)
1082                                 break;
1083                         argv_init[++args] = line;
1084                 }
1085         }
1086         argv_init[args+1] = NULL;
1087         envp_init[envs+1] = NULL;
1088 }
1089
1090
1091 extern void setup_arch(char **, unsigned long *, unsigned long *);
1092 extern int cpu_idle(void * unused);
1093
1094 #ifndef __SMP__
1095
1096 #define smp_init()      do { } while (0)
1097
1098 #else
1099
1100 /* Called by boot processor to activate the rest. */
1101 static void __init smp_init(void)
1102 {
1103         /* Get other processors into their bootup holding patterns. */
1104         smp_boot_cpus();
1105         smp_threads_ready=1;
1106         smp_commence();
1107 }
1108
1109 #endif
1110
1111 extern void initialize_secondary(void);
1112
1113 /*
1114  *      Activate the first processor.
1115  */
1116
1117 asmlinkage void __init start_kernel(void)
1118 {
1119         char * command_line;
1120
1121 #ifdef __SMP__
1122         static int boot_cpu = 1;
1123         /* "current" has been set up, we need to load it now */
1124         if (!boot_cpu)
1125                 initialize_secondary();
1126         boot_cpu = 0;
1127 #endif
1128
1129 /*
1130  * Interrupts are still disabled. Do necessary setups, then
1131  * enable them
1132  */
1133         lock_kernel();
1134         printk(linux_banner);
1135         setup_arch(&command_line, &memory_start, &memory_end);
1136         memory_start = paging_init(memory_start,memory_end);
1137         trap_init();
1138         init_IRQ();
1139         sched_init();
1140         time_init();
1141         parse_options(command_line);
1142
1143         /*
1144          * HACK ALERT! This is early. We're enabling the console before
1145          * we've done PCI setups etc, and console_init() must be aware of
1146          * this. But we do want output early, in case something goes wrong.
1147          */
1148         memory_start = console_init(memory_start,memory_end);
1149 #ifdef CONFIG_MODULES
1150         init_modules();
1151 #endif
1152         if (prof_shift) {
1153                 prof_buffer = (unsigned int *) memory_start;
1154                 /* only text is profiled */
1155                 prof_len = (unsigned long) &_etext - (unsigned long) &_stext;
1156                 prof_len >>= prof_shift;
1157                 memory_start += prof_len * sizeof(unsigned int);
1158                 memset(prof_buffer, 0, prof_len * sizeof(unsigned int));
1159         }
1160
1161         memory_start = kmem_cache_init(memory_start, memory_end);
1162         sti();
1163         calibrate_delay();
1164 #ifdef CONFIG_BLK_DEV_INITRD
1165         if (initrd_start && !initrd_below_start_ok && initrd_start < memory_start) {
1166                 printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
1167                     "disabling it.\n",initrd_start,memory_start);
1168                 initrd_start = 0;
1169         }
1170 #endif
1171         mem_init(memory_start,memory_end);
1172         kmem_cache_sizes_init();
1173 #ifdef CONFIG_PROC_FS
1174         proc_root_init();
1175 #endif
1176         fork_init(memory_end-memory_start);
1177         filescache_init();
1178         dcache_init();
1179         vma_init();
1180         buffer_init(memory_end-memory_start);
1181         page_cache_init(memory_end-memory_start);
1182         kiobuf_init();
1183         signals_init();
1184         inode_init();
1185         file_table_init();
1186 #if defined(CONFIG_SYSVIPC)
1187         ipc_init();
1188 #endif
1189 #if defined(CONFIG_QUOTA)
1190         dquot_init_hash();
1191 #endif
1192         check_bugs();
1193         printk("POSIX conformance testing by UNIFIX\n");
1194
1195         /*
1196          *      We count on the initial thread going ok
1197          *      Like idlers init is an unlocked kernel thread, which will
1198          *      make syscalls (and thus be locked).
1199          */
1200         smp_init();
1201         kernel_thread(init, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1202         unlock_kernel();
1203         current->need_resched = 1;
1204         cpu_idle(NULL);
1205 }
1206
1207 #ifdef CONFIG_BLK_DEV_INITRD
1208 static int do_linuxrc(void * shell)
1209 {
1210         static char *argv[] = { "linuxrc", NULL, };
1211
1212         close(0);close(1);close(2);
1213         setsid();
1214         (void) open("/dev/console",O_RDWR,0);
1215         (void) dup(0);
1216         (void) dup(0);
1217         return execve(shell, argv, envp_init);
1218 }
1219
1220 static void __init no_initrd(char *s,int *ints)
1221 {
1222         mount_initrd = 0;
1223 }
1224 #endif
1225
1226 struct task_struct *child_reaper = &init_task;
1227
1228 /*
1229  * Ok, the machine is now initialized. None of the devices
1230  * have been touched yet, but the CPU subsystem is up and
1231  * running, and memory and process management works.
1232  *
1233  * Now we can finally start doing some real work..
1234  */
1235 static void __init do_basic_setup(void)
1236 {
1237 #ifdef CONFIG_BLK_DEV_INITRD
1238         int real_root_mountflags;
1239 #endif
1240
1241         /*
1242          * Tell the world that we're going to be the grim
1243          * reaper of innocent orphaned children.
1244          *
1245          * We don't want people to have to make incorrect
1246          * assumptions about where in the task array this
1247          * can be found.
1248          */
1249         child_reaper = current;
1250
1251 #if defined(CONFIG_MTRR)        /* Do this after SMP initialization */
1252 /*
1253  * We should probably create some architecture-dependent "fixup after
1254  * everything is up" style function where this would belong better
1255  * than in init/main.c..
1256  */
1257         mtrr_init();
1258 #endif
1259
1260 #ifdef CONFIG_SYSCTL
1261         sysctl_init();
1262 #endif
1263
1264         /*
1265          * Ok, at this point all CPU's should be initialized, so
1266          * we can start looking into devices..
1267          */
1268 #ifdef CONFIG_PCI
1269         pci_init();
1270 #endif
1271 #ifdef CONFIG_SBUS
1272         sbus_init();
1273 #endif
1274 #if defined(CONFIG_PPC)
1275         ppc_init();
1276 #endif
1277 #ifdef CONFIG_MCA
1278         mca_init();
1279 #endif
1280 #ifdef CONFIG_ARCH_ACORN
1281         ecard_init();
1282 #endif
1283 #ifdef CONFIG_ZORRO
1284         zorro_init();
1285 #endif
1286 #ifdef CONFIG_DIO
1287         dio_init();
1288 #endif
1289 #ifdef CONFIG_MAC
1290         nubus_init();
1291 #endif
1292 #ifdef CONFIG_APM
1293         apm_init();
1294 #endif
1295
1296         /* Networking initialization needs a process context */
1297         sock_init();
1298
1299         /* Launch bdflush from here, instead of the old syscall way. */
1300         kernel_thread(bdflush, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1301         /* Start the background pageout daemon. */
1302         kswapd_setup();
1303         kernel_thread(kswapd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1304
1305 #if CONFIG_AP1000
1306         /* Start the async paging daemon. */
1307         {
1308           extern int asyncd(void *);
1309           kernel_thread(asyncd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
1310         }
1311 #endif
1312
1313 #ifdef CONFIG_BLK_DEV_INITRD
1314
1315         real_root_dev = ROOT_DEV;
1316         real_root_mountflags = root_mountflags;
1317         if (initrd_start && mount_initrd) root_mountflags &= ~MS_RDONLY;
1318         else mount_initrd =0;
1319 #endif
1320
1321         /* Set up devices .. */
1322         device_setup();
1323
1324         /* .. executable formats .. */
1325         binfmt_setup();
1326
1327         /* .. filesystems .. */
1328         filesystem_setup();
1329
1330         /* Mount the root filesystem.. */
1331         mount_root();
1332
1333 #ifdef CONFIG_BLK_DEV_INITRD
1334         root_mountflags = real_root_mountflags;
1335         if (mount_initrd && ROOT_DEV != real_root_dev
1336             && MAJOR(ROOT_DEV) == RAMDISK_MAJOR && MINOR(ROOT_DEV) == 0) {
1337                 int error;
1338                 int i, pid;
1339
1340                 pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
1341                 if (pid>0)
1342                         while (pid != wait(&i));
1343                 if (MAJOR(real_root_dev) != RAMDISK_MAJOR
1344                      || MINOR(real_root_dev) != 0) {
1345                         error = change_root(real_root_dev,"/initrd");
1346                         if (error)
1347                                 printk(KERN_ERR "Change root to /initrd: "
1348                                     "error %d\n",error);
1349                 }
1350         }
1351 #endif
1352 }
1353
1354 static int init(void * unused)
1355 {
1356         lock_kernel();
1357         do_basic_setup();
1358
1359         /*
1360          * Ok, we have completed the initial bootup, and
1361          * we're essentially up and running. Get rid of the
1362          * initmem segments and start the user-mode stuff..
1363          */
1364         free_initmem();
1365         unlock_kernel();
1366
1367         if (open("/dev/console", O_RDWR, 0) < 0)
1368                 printk("Warning: unable to open an initial console.\n");
1369
1370         (void) dup(0);
1371         (void) dup(0);
1372
1373         /*
1374          * We try each of these until one succeeds.
1375          *
1376          * The Bourne shell can be used instead of init if we are
1377          * trying to recover a really broken machine.
1378          */
1379
1380         if (execute_command)
1381                 execve(execute_command,argv_init,envp_init);
1382         execve("/sbin/init",argv_init,envp_init);
1383         execve("/etc/init",argv_init,envp_init);
1384         execve("/bin/init",argv_init,envp_init);
1385         execve("/bin/sh",argv_init,envp_init);
1386         panic("No init found.  Try passing init= option to kernel.");
1387 }