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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 | /* * linux/init/main.c * * Copyright (C) 1991, 1992 Linus Torvalds * * GK 2/5/95 - Changed to support mounting root fs via NFS * Added initrd & change_root: Werner Almesberger & Hans Lermen, Feb '96 * Moan early if gcc is old, avoiding bogus kernels - Paul Gortmaker, May '96 * Simplified starting of init: Michael A. Griffith <grif@acm.org> */ #define __KERNEL_SYSCALLS__ #include <linux/types.h> #include <linux/fcntl.h> #include <linux/config.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/tty.h> #include <linux/head.h> #include <linux/unistd.h> #include <linux/string.h> #include <linux/timer.h> #include <linux/fs.h> #include <linux/proc_fs.h> #include <linux/ctype.h> #include <linux/delay.h> #include <linux/utsname.h> #include <linux/ioport.h> #include <linux/hdreg.h> #include <linux/mm.h> #include <linux/slab.h> #include <linux/major.h> #include <linux/blk.h> #include <linux/init.h> #include <asm/system.h> #include <asm/io.h> #include <asm/bugs.h> #include <stdarg.h> #ifdef CONFIG_PCI #include <linux/pci.h> #endif #ifdef CONFIG_DIO #include <linux/dio.h> #endif #ifdef CONFIG_MTRR # include <asm/mtrr.h> #endif /* * Versions of gcc older than that listed below may actually compile * and link okay, but the end product can have subtle run time bugs. * To avoid associated bogus bug reports, we flatly refuse to compile * with a gcc that is known to be too old from the very beginning. */ #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6) #error sorry, your GCC is too old. It builds incorrect kernels. #endif extern char _stext, _etext; extern char *linux_banner; extern int console_loglevel; static int init(void *); extern int bdflush(void *); extern int kswapd(void *); extern void kswapd_setup(void); extern void init_IRQ(void); extern void init_modules(void); extern long console_init(long, long); extern void sock_init(void); extern void uidcache_init(void); extern void mca_init(void); extern long sbus_init(long, long); extern long powermac_init(unsigned long, unsigned long); extern void sysctl_init(void); extern void filescache_init(void); extern void signals_init(void); #ifdef CONFIG_ARCH_ACORN extern void ecard_init(void); #endif extern void smp_setup(char *str, int *ints); #ifdef __i386__ extern void ioapic_pirq_setup(char *str, int *ints); #endif extern void no_scroll(char *str, int *ints); extern void kbd_reset_setup(char *str, int *ints); extern void panic_setup(char *str, int *ints); extern void bmouse_setup(char *str, int *ints); extern void msmouse_setup(char *str, int *ints); extern void console_setup(char *str, int *ints); #ifdef CONFIG_PRINTER extern void lp_setup(char *str, int *ints); #endif #ifdef CONFIG_JOYSTICK extern void js_setup(char *str, int *ints); #endif extern void eth_setup(char *str, int *ints); #ifdef CONFIG_ARCNET_COM20020 extern void com20020_setup(char *str, int *ints); #endif #ifdef CONFIG_ARCNET_RIM_I extern void arcrimi_setup(char *str, int *ints); #endif #ifdef CONFIG_ARCNET_COM90xxIO extern void com90io_setup(char *str, int *ints); #endif #ifdef CONFIG_ARCNET_COM90xx extern void com90xx_setup(char *str, int *ints); #endif #ifdef CONFIG_DECNET extern void decnet_setup(char *str, int *ints); #endif #ifdef CONFIG_BLK_DEV_XD extern void xd_setup(char *str, int *ints); extern void xd_manual_geo_init(char *str, int *ints); #endif #ifdef CONFIG_BLK_DEV_IDE extern void ide_setup(char *); #endif #ifdef CONFIG_PARIDE_PD extern void pd_setup(char *str, int *ints); #endif #ifdef CONFIG_PARIDE_PF extern void pf_setup(char *str, int *ints); #endif #ifdef CONFIG_PARIDE_PT extern void pt_setup(char *str, int *ints); #endif #ifdef CONFIG_PARIDE_PG extern void pg_setup(char *str, int *ints); #endif #ifdef CONFIG_PARIDE_PCD extern void pcd_setup(char *str, int *ints); #endif extern void floppy_setup(char *str, int *ints); extern void st_setup(char *str, int *ints); extern void st0x_setup(char *str, int *ints); extern void advansys_setup(char *str, int *ints); extern void tmc8xx_setup(char *str, int *ints); extern void t128_setup(char *str, int *ints); extern void pas16_setup(char *str, int *ints); extern void generic_NCR5380_setup(char *str, int *intr); extern void generic_NCR53C400_setup(char *str, int *intr); extern void generic_NCR53C400A_setup(char *str, int *intr); extern void generic_DTC3181E_setup(char *str, int *intr); extern void aha152x_setup(char *str, int *ints); extern void aha1542_setup(char *str, int *ints); extern void gdth_setup(char *str, int *ints); extern void aic7xxx_setup(char *str, int *ints); extern void AM53C974_setup(char *str, int *ints); extern void BusLogic_Setup(char *str, int *ints); extern void ncr53c8xx_setup(char *str, int *ints); extern void eata2x_setup(char *str, int *ints); extern void u14_34f_setup(char *str, int *ints); extern void fdomain_setup(char *str, int *ints); extern void ibmmca_scsi_setup(char *str, int *ints); extern void in2000_setup(char *str, int *ints); extern void NCR53c406a_setup(char *str, int *ints); extern void wd7000_setup(char *str, int *ints); extern void scsi_luns_setup(char *str, int *ints); extern void scsi_logging_setup(char *str, int *ints); extern void sound_setup(char *str, int *ints); extern void reboot_setup(char *str, int *ints); extern void video_setup(char *str, int *ints); #ifdef CONFIG_CDU31A extern void cdu31a_setup(char *str, int *ints); #endif CONFIG_CDU31A #ifdef CONFIG_BLK_DEV_PS2 extern void ed_setup(char *str, int *ints); extern void tp720_setup(char *str, int *ints); #endif CONFIG_BLK_DEV_PS2 #ifdef CONFIG_MCD extern void mcd_setup(char *str, int *ints); #endif CONFIG_MCD #ifdef CONFIG_MCDX extern void mcdx_setup(char *str, int *ints); #endif CONFIG_MCDX #ifdef CONFIG_SBPCD extern void sbpcd_setup(char *str, int *ints); #endif CONFIG_SBPCD #ifdef CONFIG_AZTCD extern void aztcd_setup(char *str, int *ints); #endif CONFIG_AZTCD #ifdef CONFIG_CDU535 extern void sonycd535_setup(char *str, int *ints); #endif CONFIG_CDU535 #ifdef CONFIG_GSCD extern void gscd_setup(char *str, int *ints); #endif CONFIG_GSCD #ifdef CONFIG_CM206 extern void cm206_setup(char *str, int *ints); #endif CONFIG_CM206 #ifdef CONFIG_OPTCD extern void optcd_setup(char *str, int *ints); #endif CONFIG_OPTCD #ifdef CONFIG_SJCD extern void sjcd_setup(char *str, int *ints); #endif CONFIG_SJCD #ifdef CONFIG_ISP16_CDI extern void isp16_setup(char *str, int *ints); #endif CONFIG_ISP16_CDI #ifdef CONFIG_BLK_DEV_RAM static void ramdisk_start_setup(char *str, int *ints); static void load_ramdisk(char *str, int *ints); static void prompt_ramdisk(char *str, int *ints); static void ramdisk_size(char *str, int *ints); #ifdef CONFIG_BLK_DEV_INITRD static void no_initrd(char *s,int *ints); #endif #endif CONFIG_BLK_DEV_RAM #ifdef CONFIG_ISDN_DRV_ICN extern void icn_setup(char *str, int *ints); #endif #ifdef CONFIG_ISDN_DRV_HISAX extern void HiSax_setup(char *str, int *ints); #endif #ifdef CONFIG_DIGIEPCA extern void epca_setup(char *str, int *ints); #endif #ifdef CONFIG_ISDN_DRV_PCBIT extern void pcbit_setup(char *str, int *ints); #endif #ifdef CONFIG_ATARIMOUSE extern void atari_mouse_setup (char *str, int *ints); #endif #ifdef CONFIG_DMASOUND extern void dmasound_setup (char *str, int *ints); #endif #ifdef CONFIG_ATARI_SCSI extern void atari_scsi_setup (char *str, int *ints); #endif extern void stram_swap_setup (char *str, int *ints); extern void wd33c93_setup (char *str, int *ints); extern void gvp11_setup (char *str, int *ints); extern void ncr53c7xx_setup (char *str, int *ints); #ifdef CONFIG_MAC_SCSI extern void mac_scsi_setup (char *str, int *ints); #endif #ifdef CONFIG_CYCLADES extern void cy_setup(char *str, int *ints); #endif #ifdef CONFIG_DIGI extern void pcxx_setup(char *str, int *ints); #endif #ifdef CONFIG_RISCOM8 extern void riscom8_setup(char *str, int *ints); #endif #ifdef CONFIG_SPECIALIX extern void specialix_setup(char *str, int *ints); #endif #ifdef CONFIG_DMASCC extern void dmascc_setup(char *str, int *ints); #endif #ifdef CONFIG_BAYCOM_PAR extern void baycom_par_setup(char *str, int *ints); #endif #ifdef CONFIG_BAYCOM_SER_FDX extern void baycom_ser_fdx_setup(char *str, int *ints); #endif #ifdef CONFIG_BAYCOM_SER_HDX extern void baycom_ser_hdx_setup(char *str, int *ints); #endif #ifdef CONFIG_SOUNDMODEM extern void sm_setup(char *str, int *ints); #endif #ifdef CONFIG_PMAC_CONSOLE extern void pmac_cons_setup(char *str, int *ints); extern void pmac_vmode_setup(char *str, int *ints); #endif #ifdef CONFIG_WDT extern void wdt_setup(char *str, int *ints); #endif #ifdef CONFIG_PARPORT extern void parport_setup(char *str, int *ints); #endif #ifdef CONFIG_PLIP extern void plip_setup(char *str, int *ints); #endif #ifdef CONFIG_HFMODEM extern void hfmodem_setup(char *str, int *ints); #endif #ifdef CONFIG_IP_PNP extern void ip_auto_config_setup(char *str, int *ints); #endif #ifdef CONFIG_ROOT_NFS extern void nfs_root_setup(char *str, int *ints); #endif #ifdef CONFIG_FTAPE extern void ftape_setup(char *str, int *ints); #endif #if defined(CONFIG_SYSVIPC) extern void ipc_init(void); #endif #if defined(CONFIG_QUOTA) extern void dquot_init_hash(void); #endif #ifdef CONFIG_MD_BOOT extern void md_setup(char *str,int *ints) __init; #endif #ifdef __sparc__ extern int serial_console; #endif /* * Boot command-line arguments */ #define MAX_INIT_ARGS 8 #define MAX_INIT_ENVS 8 extern void time_init(void); static unsigned long memory_start = 0; static unsigned long memory_end = 0; int rows, cols; #ifdef CONFIG_BLK_DEV_RAM extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */ extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */ extern int rd_size; /* Size of the ramdisk(s) */ extern int rd_image_start; /* starting block # of image */ #ifdef CONFIG_BLK_DEV_INITRD kdev_t real_root_dev; #endif #endif int root_mountflags = MS_RDONLY; char *execute_command = NULL; static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, }; static char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, }; char *get_options(char *str, int *ints) { char *cur = str; int i=1; while (cur && isdigit(*cur) && i <= 10) { ints[i++] = simple_strtoul(cur,NULL,0); if ((cur = strchr(cur,',')) != NULL) cur++; } ints[0] = i-1; return(cur); } static void __init profile_setup(char *str, int *ints) { if (ints[0] > 0) prof_shift = (unsigned long) ints[1]; else prof_shift = 2; } static struct dev_name_struct { const char *name; const int num; } root_dev_names[] __initdata = { #ifdef CONFIG_ROOT_NFS { "nfs", 0x00ff }, #endif #ifdef CONFIG_BLK_DEV_IDE { "hda", 0x0300 }, { "hdb", 0x0340 }, { "hdc", 0x1600 }, { "hdd", 0x1640 }, { "hde", 0x2100 }, { "hdf", 0x2140 }, { "hdg", 0x2200 }, { "hdh", 0x2240 }, #endif #ifdef CONFIG_BLK_DEV_SD { "sda", 0x0800 }, { "sdb", 0x0810 }, { "sdc", 0x0820 }, { "sdd", 0x0830 }, { "sde", 0x0840 }, { "sdf", 0x0850 }, { "sdg", 0x0860 }, { "sdh", 0x0870 }, { "sdi", 0x0880 }, { "sdj", 0x0890 }, { "sdk", 0x08a0 }, { "sdl", 0x08b0 }, { "sdm", 0x08c0 }, { "sdn", 0x08d0 }, { "sdo", 0x08e0 }, { "sdp", 0x08f0 }, #endif #ifdef CONFIG_ATARI_ACSI { "ada", 0x1c00 }, { "adb", 0x1c10 }, { "adc", 0x1c20 }, { "add", 0x1c30 }, { "ade", 0x1c40 }, #endif #ifdef CONFIG_BLK_DEV_FD { "fd", 0x0200 }, #endif #ifdef CONFIG_MD_BOOT { "md", 0x0900 }, #endif #ifdef CONFIG_BLK_DEV_XD { "xda", 0x0d00 }, { "xdb", 0x0d40 }, #endif #ifdef CONFIG_BLK_DEV_RAM { "ram", 0x0100 }, #endif #ifdef CONFIG_BLK_DEV_SR { "scd", 0x0b00 }, #endif #ifdef CONFIG_MCD { "mcd", 0x1700 }, #endif #ifdef CONFIG_CDU535 { "cdu535", 0x1800 }, { "sonycd", 0x1800 }, #endif #ifdef CONFIG_AZTCD { "aztcd", 0x1d00 }, #endif #ifdef CONFIG_CM206 { "cm206cd", 0x2000 }, #endif #ifdef CONFIG_GSCD { "gscd", 0x1000 }, #endif #ifdef CONFIG_SBPCD { "sbpcd", 0x1900 }, #endif #ifdef CONFIG_BLK_DEV_PS2 { "eda", 0x2400 }, #endif #ifdef CONFIG_PARIDE_PD { "pda", 0x2d00 }, { "pdb", 0x2d10 }, { "pdc", 0x2d20 }, { "pdd", 0x2d30 }, #endif #ifdef CONFIG_PARIDE_PCD { "pcd", 0x2e00 }, #endif #ifdef CONFIG_PARIDE_PF { "pf", 0x2f00 }, #endif #if CONFIG_APBLOCK { "apblock", APBLOCK_MAJOR << 8}, #endif #if CONFIG_DDV { "ddv", DDV_MAJOR << 8}, #endif { NULL, 0 } }; __initfunc(kdev_t name_to_kdev_t(char *line)) { int base = 0; if (strncmp(line,"/dev/",5) == 0) { struct dev_name_struct *dev = root_dev_names; line += 5; do { int len = strlen(dev->name); if (strncmp(line,dev->name,len) == 0) { line += len; base = dev->num; break; } dev++; } while (dev->name); } return to_kdev_t(base + simple_strtoul(line,NULL,base?10:16)); } __initfunc(static void root_dev_setup(char *line, int *num)) { ROOT_DEV = name_to_kdev_t(line); } /* * List of kernel command line parameters. The first table lists parameters * which are subject to values parsing (leading numbers are converted to * an array of ints and chopped off the string), the second table contains * the few exceptions which obey their own syntax rules. */ struct kernel_param { const char *str; void (*setup_func)(char *, int *); }; static struct kernel_param cooked_params[] __initdata = { /* FIXME: make PNP just become reserve_setup */ #ifndef CONFIG_KERNEL_PNP_RESOURCE { "reserve=", reserve_setup }, #else { "reserve=", pnp_reserve_setup }, #endif { "profile=", profile_setup }, #ifdef __SMP__ { "nosmp", smp_setup }, { "maxcpus=", smp_setup }, #ifdef __i386__ { "pirq=", ioapic_pirq_setup }, #endif #endif #ifdef CONFIG_BLK_DEV_RAM { "ramdisk_start=", ramdisk_start_setup }, { "load_ramdisk=", load_ramdisk }, { "prompt_ramdisk=", prompt_ramdisk }, { "ramdisk=", ramdisk_size }, { "ramdisk_size=", ramdisk_size }, #ifdef CONFIG_BLK_DEV_INITRD { "noinitrd", no_initrd }, #endif #endif #ifdef CONFIG_FB { "video=", video_setup }, #endif { "panic=", panic_setup }, { "console=", console_setup }, #ifdef CONFIG_VT #ifdef CONFIG_VGA_CONSOLE { "no-scroll", no_scroll }, #endif { "kbd-reset", kbd_reset_setup }, #endif #ifdef CONFIG_BUGi386 { "no-hlt", no_halt }, { "no387", no_387 }, { "reboot=", reboot_setup }, #endif #ifdef CONFIG_INET { "ether=", eth_setup }, #endif #ifdef CONFIG_ARCNET_COM20020 { "com20020=", com20020_setup }, #endif #ifdef CONFIG_ARCNET_RIM_I { "arcrimi=", arcrimi_setup }, #endif #ifdef CONFIG_ARCNET_COM90xxIO { "com90io=", com90io_setup }, #endif #ifdef CONFIG_ARCNET_COM90xx { "com90xx=", com90xx_setup }, #endif #ifdef CONFIG_DECNET { "decnet=", decnet_setup }, #endif #ifdef CONFIG_PRINTER { "lp=", lp_setup }, #endif #ifdef CONFIG_JOYSTICK { "js=", js_setup }, #endif #ifdef CONFIG_SCSI { "max_scsi_luns=", scsi_luns_setup }, { "scsi_logging=", scsi_logging_setup }, #endif #ifdef CONFIG_SCSI_ADVANSYS { "advansys=", advansys_setup }, #endif #if defined(CONFIG_BLK_DEV_HD) { "hd=", hd_setup }, #endif #ifdef CONFIG_CHR_DEV_ST { "st=", st_setup }, #endif #ifdef CONFIG_BUSMOUSE { "bmouse=", bmouse_setup }, #endif #ifdef CONFIG_MS_BUSMOUSE { "msmouse=", msmouse_setup }, #endif #ifdef CONFIG_SCSI_SEAGATE { "st0x=", st0x_setup }, { "tmc8xx=", tmc8xx_setup }, #endif #ifdef CONFIG_SCSI_T128 { "t128=", t128_setup }, #endif #ifdef CONFIG_SCSI_PAS16 { "pas16=", pas16_setup }, #endif #ifdef CONFIG_SCSI_GENERIC_NCR5380 { "ncr5380=", generic_NCR5380_setup }, { "ncr53c400=", generic_NCR53C400_setup }, { "ncr53c400a=", generic_NCR53C400A_setup }, { "dtc3181e=", generic_DTC3181E_setup }, #endif #ifdef CONFIG_SCSI_AHA152X { "aha152x=", aha152x_setup}, #endif #ifdef CONFIG_SCSI_AHA1542 { "aha1542=", aha1542_setup}, #endif #ifdef CONFIG_SCSI_GDTH { "gdth=", gdth_setup}, #endif #ifdef CONFIG_SCSI_AIC7XXX { "aic7xxx=", aic7xxx_setup}, #endif #ifdef CONFIG_SCSI_BUSLOGIC { "BusLogic=", BusLogic_Setup}, #endif #ifdef CONFIG_SCSI_NCR53C8XX { "ncr53c8xx=", ncr53c8xx_setup}, #endif #ifdef CONFIG_SCSI_EATA { "eata=", eata2x_setup}, #endif #ifdef CONFIG_SCSI_U14_34F { "u14-34f=", u14_34f_setup}, #endif #ifdef CONFIG_SCSI_AM53C974 { "AM53C974=", AM53C974_setup}, #endif #ifdef CONFIG_SCSI_NCR53C406A { "ncr53c406a=", NCR53c406a_setup}, #endif #ifdef CONFIG_SCSI_FUTURE_DOMAIN { "fdomain=", fdomain_setup}, #endif #ifdef CONFIG_SCSI_IN2000 { "in2000=", in2000_setup}, #endif #ifdef CONFIG_SCSI_7000FASST { "wd7000=", wd7000_setup}, #endif #ifdef CONFIG_SCSI_IBMMCA { "ibmmcascsi=", ibmmca_scsi_setup }, #endif #ifdef CONFIG_BLK_DEV_XD { "xd=", xd_setup }, { "xd_geo=", xd_manual_geo_init }, #endif #if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY) { "floppy=", floppy_setup }, #endif #ifdef CONFIG_BLK_DEV_PS2 { "ed=", ed_setup }, { "tp720=", tp720_setup }, #endif #ifdef CONFIG_CDU31A { "cdu31a=", cdu31a_setup }, #endif CONFIG_CDU31A #ifdef CONFIG_MCD { "mcd=", mcd_setup }, #endif CONFIG_MCD #ifdef CONFIG_MCDX { "mcdx=", mcdx_setup }, #endif CONFIG_MCDX #ifdef CONFIG_SBPCD { "sbpcd=", sbpcd_setup }, #endif CONFIG_SBPCD #ifdef CONFIG_AZTCD { "aztcd=", aztcd_setup }, #endif CONFIG_AZTCD #ifdef CONFIG_CDU535 { "sonycd535=", sonycd535_setup }, #endif CONFIG_CDU535 #ifdef CONFIG_GSCD { "gscd=", gscd_setup }, #endif CONFIG_GSCD #ifdef CONFIG_CM206 { "cm206=", cm206_setup }, #endif CONFIG_CM206 #ifdef CONFIG_OPTCD { "optcd=", optcd_setup }, #endif CONFIG_OPTCD #ifdef CONFIG_SJCD { "sjcd=", sjcd_setup }, #endif CONFIG_SJCD #ifdef CONFIG_ISP16_CDI { "isp16=", isp16_setup }, #endif CONFIG_ISP16_CDI #ifdef CONFIG_SOUND_OSS { "sound=", sound_setup }, #endif #ifdef CONFIG_ISDN_DRV_ICN { "icn=", icn_setup }, #endif #ifdef CONFIG_ISDN_DRV_HISAX { "hisax=", HiSax_setup }, { "HiSax=", HiSax_setup }, #endif #ifdef CONFIG_ISDN_DRV_PCBIT { "pcbit=", pcbit_setup }, #endif #ifdef CONFIG_ATARIMOUSE { "atamouse=", atari_mouse_setup }, #endif #ifdef CONFIG_DMASOUND { "dmasound=", dmasound_setup }, #endif #ifdef CONFIG_ATARI_SCSI { "atascsi=", atari_scsi_setup }, #endif #ifdef CONFIG_STRAM_SWAP { "stram_swap=", stram_swap_setup }, #endif #if defined(CONFIG_A4000T_SCSI) || defined(CONFIG_WARPENGINE_SCSI) \ || defined(CONFIG_A4091_SCSI) || defined(CONFIG_MVME16x_SCSI) \ || defined(CONFIG_BVME6000_SCSI) { "53c7xx=", ncr53c7xx_setup }, #endif #if defined(CONFIG_A3000_SCSI) || defined(CONFIG_A2091_SCSI) \ || defined(CONFIG_GVP11_SCSI) { "wd33c93=", wd33c93_setup }, #endif #if defined(CONFIG_GVP11_SCSI) { "gvp11=", gvp11_setup }, #endif #ifdef CONFIG_MAC_SCSI { "mac5380=", mac_scsi_setup }, #endif #ifdef CONFIG_CYCLADES { "cyclades=", cy_setup }, #endif #ifdef CONFIG_DIGI { "digi=", pcxx_setup }, #endif #ifdef CONFIG_DIGIEPCA { "digiepca=", epca_setup }, #endif #ifdef CONFIG_RISCOM8 { "riscom8=", riscom8_setup }, #endif #ifdef CONFIG_DMASCC { "dmascc=", dmascc_setup }, #endif #ifdef CONFIG_SPECIALIX { "specialix=", specialix_setup }, #endif #ifdef CONFIG_BAYCOM_PAR { "baycom_par=", baycom_par_setup }, #endif #ifdef CONFIG_BAYCOM_SER_FDX { "baycom_ser_fdx=", baycom_ser_fdx_setup }, #endif #ifdef CONFIG_BAYCOM_SER_HDX { "baycom_ser_hdx=", baycom_ser_hdx_setup }, #endif #ifdef CONFIG_SOUNDMODEM { "soundmodem=", sm_setup }, #endif #ifdef CONFIG_WDT { "wdt=", wdt_setup }, #endif #ifdef CONFIG_PARPORT { "parport=", parport_setup }, #endif #ifdef CONFIG_PLIP { "plip=", plip_setup }, #endif #ifdef CONFIG_HFMODEM { "hfmodem=", hfmodem_setup }, #endif #ifdef CONFIG_FTAPE { "ftape=", ftape_setup}, #endif #ifdef CONFIG_MD_BOOT { "md=", md_setup}, #endif #ifdef CONFIG_MACMOUSE { "adb_buttons=", adb_mouse_setup }, #endif { 0, 0 } }; static struct kernel_param raw_params[] __initdata = { { "root=", root_dev_setup }, #ifdef CONFIG_ROOT_NFS { "nfsroot=", nfs_root_setup }, { "nfsaddrs=", ip_auto_config_setup }, #endif #ifdef CONFIG_IP_PNP { "ip=", ip_auto_config_setup }, #endif #ifdef CONFIG_PCI { "pci=", pci_setup }, #endif #ifdef CONFIG_PARIDE_PD { "pd.", pd_setup }, #endif #ifdef CONFIG_PARIDE_PCD { "pcd.", pcd_setup }, #endif #ifdef CONFIG_PARIDE_PF { "pf.", pf_setup }, #endif #ifdef CONFIG_PARIDE_PT { "pt.", pt_setup }, #endif #ifdef CONFIG_PARIDE_PG { "pg.", pg_setup }, #endif { 0, 0 } }; #ifdef CONFIG_BLK_DEV_RAM __initfunc(static void ramdisk_start_setup(char *str, int *ints)) { if (ints[0] > 0 && ints[1] >= 0) rd_image_start = ints[1]; } __initfunc(static void load_ramdisk(char *str, int *ints)) { if (ints[0] > 0 && ints[1] >= 0) rd_doload = ints[1] & 1; } __initfunc(static void prompt_ramdisk(char *str, int *ints)) { if (ints[0] > 0 && ints[1] >= 0) rd_prompt = ints[1] & 1; } __initfunc(static void ramdisk_size(char *str, int *ints)) { if (ints[0] > 0 && ints[1] >= 0) rd_size = ints[1]; } #endif __initfunc(static int checksetup(char *line)) { int i, ints[11]; #ifdef CONFIG_BLK_DEV_IDE /* ide driver needs the basic string, rather than pre-processed values */ if (!strncmp(line,"ide",3) || (!strncmp(line,"hd",2) && line[2] != '=')) { ide_setup(line); return 1; } #endif for (i=0; raw_params[i].str; i++) { int n = strlen(raw_params[i].str); if (!strncmp(line,raw_params[i].str,n)) { raw_params[i].setup_func(line+n, NULL); return 1; } } for (i=0; cooked_params[i].str; i++) { int n = strlen(cooked_params[i].str); if (!strncmp(line,cooked_params[i].str,n)) { cooked_params[i].setup_func(get_options(line+n, ints), ints); return 1; } } return 0; } /* this should be approx 2 Bo*oMips to start (note initial shift), and will still work even if initially too large, it will just take slightly longer */ unsigned long loops_per_sec = (1<<12); /* This is the number of bits of precision for the loops_per_second. Each bit takes on average 1.5/HZ seconds. This (like the original) is a little better than 1% */ #define LPS_PREC 8 __initfunc(void calibrate_delay(void)) { unsigned long ticks, loopbit; int lps_precision = LPS_PREC; loops_per_sec = (1<<12); printk("Calibrating delay loop... "); while (loops_per_sec <<= 1) { /* wait for "start of" clock tick */ ticks = jiffies; while (ticks == jiffies) /* nothing */; /* Go .. */ ticks = jiffies; __delay(loops_per_sec); ticks = jiffies - ticks; if (ticks) break; } /* Do a binary approximation to get loops_per_second set to equal one clock (up to lps_precision bits) */ loops_per_sec >>= 1; loopbit = loops_per_sec; while ( lps_precision-- && (loopbit >>= 1) ) { loops_per_sec |= loopbit; ticks = jiffies; while (ticks == jiffies); ticks = jiffies; __delay(loops_per_sec); if (jiffies != ticks) /* longer than 1 tick */ loops_per_sec &= ~loopbit; } /* finally, adjust loops per second in terms of seconds instead of clocks */ loops_per_sec *= HZ; /* Round the value and print it */ printk("%lu.%02lu BogoMIPS\n", (loops_per_sec+2500)/500000, ((loops_per_sec+2500)/5000) % 100); } /* * This is a simple kernel command line parsing function: it parses * the command line, and fills in the arguments/environment to init * as appropriate. Any cmd-line option is taken to be an environment * variable if it contains the character '='. * * This routine also checks for options meant for the kernel. * These options are not given to init - they are for internal kernel use only. */ __initfunc(static void parse_options(char *line)) { char *next; int args, envs; if (!*line) return; args = 0; envs = 1; /* TERM is set to 'linux' by default */ next = line; while ((line = next) != NULL) { if ((next = strchr(line,' ')) != NULL) *next++ = 0; /* * check for kernel options first.. */ if (!strcmp(line,"ro")) { root_mountflags |= MS_RDONLY; continue; } if (!strcmp(line,"rw")) { root_mountflags &= ~MS_RDONLY; continue; } if (!strcmp(line,"debug")) { console_loglevel = 10; continue; } if (!strncmp(line,"init=",5)) { line += 5; execute_command = line; /* In case LILO is going to boot us with default command line, * it prepends "auto" before the whole cmdline which makes * the shell think it should execute a script with such name. * So we ignore all arguments entered _before_ init=... [MJ] */ args = 0; continue; } if (checksetup(line)) continue; /* * Then check if it's an environment variable or * an option. */ if (strchr(line,'=')) { if (envs >= MAX_INIT_ENVS) break; envp_init[++envs] = line; } else { if (args >= MAX_INIT_ARGS) break; argv_init[++args] = line; } } argv_init[args+1] = NULL; envp_init[envs+1] = NULL; } extern void setup_arch(char **, unsigned long *, unsigned long *); #ifndef __SMP__ /* * Uniprocessor idle thread */ int cpu_idle(void *unused) { for(;;) idle(); } #else /* * Multiprocessor idle thread is in arch/... */ extern int cpu_idle(void * unused); /* Called by boot processor to activate the rest. */ __initfunc(static void smp_init(void)) { /* Get other processors into their bootup holding patterns. */ smp_boot_cpus(); } /* * The autoprobe routines assume CPU#0 on the i386 * so we don't actually set the game in motion until * they are finished. */ __initfunc(static void smp_begin(void)) { smp_threads_ready=1; smp_commence(); } #endif extern void initialize_secondary(void); /* * Activate the first processor. */ __initfunc(asmlinkage void start_kernel(void)) { char * command_line; #ifdef __SMP__ static int boot_cpu = 1; /* "current" has been set up, we need to load it now */ if (!boot_cpu) initialize_secondary(); boot_cpu = 0; #endif /* * Interrupts are still disabled. Do necessary setups, then * enable them */ printk(linux_banner); setup_arch(&command_line, &memory_start, &memory_end); memory_start = paging_init(memory_start,memory_end); trap_init(); init_IRQ(); sched_init(); time_init(); parse_options(command_line); /* * HACK ALERT! This is early. We're enabling the console before * we've done PCI setups etc, and console_init() must be aware of * this. But we do want output early, in case something goes wrong. */ memory_start = console_init(memory_start,memory_end); #ifdef CONFIG_MODULES init_modules(); #endif if (prof_shift) { prof_buffer = (unsigned int *) memory_start; /* only text is profiled */ prof_len = (unsigned long) &_etext - (unsigned long) &_stext; prof_len >>= prof_shift; memory_start += prof_len * sizeof(unsigned int); memset(prof_buffer, 0, prof_len * sizeof(unsigned int)); } memory_start = kmem_cache_init(memory_start, memory_end); sti(); calibrate_delay(); #ifdef CONFIG_BLK_DEV_INITRD if (initrd_start && !initrd_below_start_ok && initrd_start < memory_start) { printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - " "disabling it.\n",initrd_start,memory_start); initrd_start = 0; } #endif mem_init(memory_start,memory_end); kmem_cache_sizes_init(); #ifdef CONFIG_PROC_FS proc_root_init(); #endif uidcache_init(); filescache_init(); dcache_init(); vma_init(); buffer_init(); signals_init(); inode_init(); file_table_init(); #if defined(CONFIG_SYSVIPC) ipc_init(); #endif #if defined(CONFIG_QUOTA) dquot_init_hash(); #endif printk("POSIX conformance testing by UNIFIX\n"); #ifdef __SMP__ smp_init(); #endif check_bugs(); #if defined(CONFIG_MTRR) /* Do this after SMP initialization */ /* * We should probably create some architecture-dependent "fixup after * everything is up" style function where this would belong better * than in init/main.c.. */ mtrr_init (); #endif sock_init(); #ifdef CONFIG_SYSCTL sysctl_init(); #endif #ifdef CONFIG_DIO dio_init(); #endif /* * Ok, at this point all CPU's should be initialized, so * we can start looking into devices.. */ #ifdef CONFIG_PCI pci_init(); #endif #ifdef CONFIG_SBUS sbus_init(); #endif #if defined(CONFIG_PMAC) || defined(CONFIG_CHRP) powermac_init(); #endif #ifdef CONFIG_MCA mca_init(); #endif #ifdef CONFIG_ARCH_ACORN ecard_init(); #endif /* * We count on the initial thread going ok * Like idlers init is an unlocked kernel thread, which will * make syscalls (and thus be locked). */ kernel_thread(init, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND); /* * task[0] is meant to be used as an "idle" task: it may not sleep, but * it might do some general things like count free pages or it could be * used to implement a reasonable LRU algorithm for the paging routines: * anything that can be useful, but shouldn't take time from the real * processes. * * Right now task[0] just does an infinite idle loop. */ cpu_idle(NULL); } #ifdef CONFIG_BLK_DEV_INITRD static int do_linuxrc(void * shell) { static char *argv[] = { "linuxrc", NULL, }; close(0);close(1);close(2); setsid(); (void) open("/dev/console",O_RDWR,0); (void) dup(0); (void) dup(0); return execve(shell, argv, envp_init); } __initfunc(static void no_initrd(char *s,int *ints)) { mount_initrd = 0; } #endif static int init(void * unused) { #ifdef CONFIG_BLK_DEV_INITRD int real_root_mountflags; #endif /* Launch bdflush from here, instead of the old syscall way. */ kernel_thread(bdflush, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND); /* Start the background pageout daemon. */ kswapd_setup(); kernel_thread(kswapd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND); #if CONFIG_AP1000 /* Start the async paging daemon. */ { extern int asyncd(void *); kernel_thread(asyncd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND); } #endif #ifdef CONFIG_BLK_DEV_INITRD real_root_dev = ROOT_DEV; real_root_mountflags = root_mountflags; if (initrd_start && mount_initrd) root_mountflags &= ~MS_RDONLY; else mount_initrd =0; #endif setup(0); #ifdef __SMP__ /* * With the devices probed and setup we can * now enter SMP mode. */ smp_begin(); #endif #ifdef CONFIG_UMSDOS_FS { /* When mounting a umsdos fs as root, we detect the pseudo_root (/linux) and initialise it here. pseudo_root is defined in fs/umsdos/inode.c */ extern struct inode *pseudo_root; if (pseudo_root != NULL){ current->fs->root = pseudo_root; current->fs->pwd = pseudo_root; } } #endif #ifdef CONFIG_BLK_DEV_INITRD root_mountflags = real_root_mountflags; if (mount_initrd && ROOT_DEV != real_root_dev && MAJOR(ROOT_DEV) == RAMDISK_MAJOR && MINOR(ROOT_DEV) == 0) { int error; int i, pid; pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD); if (pid>0) while (pid != wait(&i)); if (MAJOR(real_root_dev) != RAMDISK_MAJOR || MINOR(real_root_dev) != 0) { error = change_root(real_root_dev,"/initrd"); if (error) printk(KERN_ERR "Change root to /initrd: " "error %d\n",error); } } #endif setup(1); if (open("/dev/console", O_RDWR, 0) < 0) printk("Warning: unable to open an initial console.\n"); (void) dup(0); (void) dup(0); /* * We try each of these until one succeeds. * * The Bourne shell can be used instead of init if we are * trying to recover a really broken machine. */ if (execute_command) execve(execute_command,argv_init,envp_init); execve("/sbin/init",argv_init,envp_init); execve("/etc/init",argv_init,envp_init); execve("/bin/init",argv_init,envp_init); execve("/bin/sh",argv_init,envp_init); panic("No init found. Try passing init= option to kernel."); } |