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Init/main.c


18683 /* 18684 * linux/init/main.c 18685 * 18686 * Copyright (C) 1991, 1992 Linus Torvalds 18687 * 18688 * GK 2/5/95 - Changed to support mounting root fs via 18689 * NFS 18690 * Added initrd & change_root: Werner Almesberger & Hans 18691 * Lermen, Feb '96 18692 * Moan early if gcc is old, avoiding bogus kernels - 18693 * Paul Gortmaker, May '96 18694 * Simplified starting of init: Michael A. Griffith 18695 * <grif@acm.org> */ 18696 18697 #define __KERNEL_SYSCALLS__ 18698 18699 #include <linux/config.h> 18700 #include <linux/proc_fs.h> 18701 #include <linux/unistd.h> 18702 #include <linux/ctype.h> 18703 #include <linux/delay.h> 18704 #include <linux/utsname.h> 18705 #include <linux/ioport.h> 18706 #include <linux/init.h> 18707 #include <linux/smp_lock.h> 18708 #include <linux/blk.h> 18709 #include <linux/hdreg.h> 18710 18711 #include <asm/io.h> 18712 #include <asm/bugs.h> 18713 18714 #ifdef CONFIG_PCI 18715 #include <linux/pci.h> 18716 #endif 18717 18718 #ifdef CONFIG_DIO 18719 #include <linux/dio.h> 18720 #endif 18721 18722 #ifdef CONFIG_ZORRO 18723 #include <linux/zorro.h> 18724 #endif 18725 18726 #ifdef CONFIG_MTRR 18727 # include <asm/mtrr.h> 18728 #endif 18729 18730 #ifdef CONFIG_APM 18731 #include <linux/apm_bios.h> 18732 #endif 18733 18734 /* Versions of gcc older than that listed below may 18735 * actually compile and link okay, but the end product 18736 * can have subtle run time bugs. To avoid associated 18737 * bogus bug reports, we flatly refuse to compile with a 18738 * gcc that is known to be too old from the very 18739 * beginning. */ 18740 #if __GNUC__ < 2 (__GNUC__ == 2 && __GNUC_MINOR__ < 6) 18741 #error sorry, your GCC is too old. \ 18742 It builds incorrect kernels. 18743 #endif 18744 18745 extern char _stext, _etext; 18746 extern char *linux_banner; 18747 18748 extern int console_loglevel; 18749 18750 static int init(void *); 18751 extern int bdflush(void *); 18752 extern int kswapd(void *); 18753 extern int kpiod(void *); 18754 extern void kswapd_setup(void); 18755 18756 extern void init_IRQ(void); 18757 extern void init_modules(void); 18758 extern long console_init(long, long); 18759 extern void sock_init(void); 18760 extern void uidcache_init(void); 18761 extern void mca_init(void); 18762 extern void sbus_init(void); 18763 extern void powermac_init(void); 18764 extern void sysctl_init(void); 18765 extern void filescache_init(void); 18766 extern void signals_init(void); 18767 18768 extern void device_setup(void); 18769 extern void binfmt_setup(void); 18770 extern void free_initmem(void); 18771 extern void filesystem_setup(void); 18772 18773 #ifdef CONFIG_ARCH_ACORN 18774 extern void ecard_init(void); 18775 #endif 18776 18777 extern void smp_setup(char *str, int *ints); 18778 #ifdef __i386__ 18779 extern void ioapic_pirq_setup(char *str, int *ints); 18780 extern void ioapic_setup(char *str, int *ints); 18781 #endif 18782 extern void no_scroll(char *str, int *ints); 18783 extern void kbd_reset_setup(char *str, int *ints); 18784 extern void panic_setup(char *str, int *ints); 18785 extern void bmouse_setup(char *str, int *ints); 18786 extern void msmouse_setup(char *str, int *ints); 18787 extern void console_setup(char *str, int *ints); 18788 #ifdef CONFIG_PRINTER 18789 extern void lp_setup(char *str, int *ints); 18790 #endif 18791 #ifdef CONFIG_JOY_AMIGA 18792 extern void js_am_setup(char *str, int *ints); 18793 #endif 18794 #ifdef CONFIG_JOY_ANALOG 18795 extern void js_an_setup(char *str, int *ints); 18796 #endif 18797 #ifdef CONFIG_JOY_ASSASIN 18798 extern void js_as_setup(char *str, int *ints); 18799 #endif 18800 #ifdef CONFIG_JOY_CONSOLE 18801 extern void js_console_setup(char *str, int *ints); 18802 #endif 18803 #ifdef CONFIG_JOY_DB9 18804 extern void js_db9_setup(char *str, int *ints); 18805 #endif 18806 #ifdef CONFIG_JOY_TURBOGRAFX 18807 extern void js_tg_setup(char *str, int *ints); 18808 #endif 18809 #ifdef CONFIG_JOY_LIGHTNING 18810 extern void js_l4_setup(char *str, int *ints); 18811 #endif 18812 extern void eth_setup(char *str, int *ints); 18813 #ifdef CONFIG_ARCNET_COM20020 18814 extern void com20020_setup(char *str, int *ints); 18815 #endif 18816 #ifdef CONFIG_ARCNET_RIM_I 18817 extern void arcrimi_setup(char *str, int *ints); 18818 #endif 18819 #ifdef CONFIG_ARCNET_COM90xxIO 18820 extern void com90io_setup(char *str, int *ints); 18821 #endif 18822 #ifdef CONFIG_ARCNET_COM90xx 18823 extern void com90xx_setup(char *str, int *ints); 18824 #endif 18825 #ifdef CONFIG_DECNET 18826 extern void decnet_setup(char *str, int *ints); 18827 #endif 18828 #ifdef CONFIG_BLK_DEV_XD 18829 extern void xd_setup(char *str, int *ints); 18830 extern void xd_manual_geo_init(char *str, int *ints); 18831 #endif 18832 #ifdef CONFIG_BLK_DEV_IDE 18833 extern void ide_setup(char *); 18834 #endif 18835 #ifdef CONFIG_PARIDE_PD 18836 extern void pd_setup(char *str, int *ints); 18837 #endif 18838 #ifdef CONFIG_PARIDE_PF 18839 extern void pf_setup(char *str, int *ints); 18840 #endif 18841 #ifdef CONFIG_PARIDE_PT 18842 extern void pt_setup(char *str, int *ints); 18843 #endif 18844 #ifdef CONFIG_PARIDE_PG 18845 extern void pg_setup(char *str, int *ints); 18846 #endif 18847 #ifdef CONFIG_PARIDE_PCD 18848 extern void pcd_setup(char *str, int *ints); 18849 #endif 18850 extern void floppy_setup(char *str, int *ints); 18851 extern void st_setup(char *str, int *ints); 18852 extern void st0x_setup(char *str, int *ints); 18853 extern void advansys_setup(char *str, int *ints); 18854 extern void tmc8xx_setup(char *str, int *ints); 18855 extern void t128_setup(char *str, int *ints); 18856 extern void pas16_setup(char *str, int *ints); 18857 extern void generic_NCR5380_setup(char *str, int *intr); 18858 extern void generic_NCR53C400_setup(char *str,int *intr); 18859 extern void generic_NCR53C400A_setup(char *str, 18860 int *intr); 18861 extern void generic_DTC3181E_setup(char *str, int *intr); 18862 extern void aha152x_setup(char *str, int *ints); 18863 extern void aha1542_setup(char *str, int *ints); 18864 extern void gdth_setup(char *str, int *ints); 18865 extern void aic7xxx_setup(char *str, int *ints); 18866 extern void AM53C974_setup(char *str, int *ints); 18867 extern void BusLogic_Setup(char *str, int *ints); 18868 extern void ncr53c8xx_setup(char *str, int *ints); 18869 extern void eata2x_setup(char *str, int *ints); 18870 extern void u14_34f_setup(char *str, int *ints); 18871 extern void fdomain_setup(char *str, int *ints); 18872 extern void ibmmca_scsi_setup(char *str, int *ints); 18873 extern void in2000_setup(char *str, int *ints); 18874 extern void NCR53c406a_setup(char *str, int *ints); 18875 extern void sym53c416_setup(char *str, int *ints); 18876 extern void wd7000_setup(char *str, int *ints); 18877 extern void dc390_setup(char* str, int *ints); 18878 extern void scsi_luns_setup(char *str, int *ints); 18879 extern void scsi_logging_setup(char *str, int *ints); 18880 extern void sound_setup(char *str, int *ints); 18881 extern void reboot_setup(char *str, int *ints); 18882 extern void video_setup(char *str, int *ints); 18883 #ifdef CONFIG_CDU31A 18884 extern void cdu31a_setup(char *str, int *ints); 18885 #endif CONFIG_CDU31A 18886 #ifdef CONFIG_BLK_DEV_PS2 18887 extern void ed_setup(char *str, int *ints); 18888 extern void tp720_setup(char *str, int *ints); 18889 #endif CONFIG_BLK_DEV_PS2 18890 #ifdef CONFIG_MCD 18891 extern void mcd_setup(char *str, int *ints); 18892 #endif CONFIG_MCD 18893 #ifdef CONFIG_MCDX 18894 extern void mcdx_setup(char *str, int *ints); 18895 #endif CONFIG_MCDX 18896 #ifdef CONFIG_SBPCD 18897 extern void sbpcd_setup(char *str, int *ints); 18898 #endif CONFIG_SBPCD 18899 #ifdef CONFIG_AZTCD 18900 extern void aztcd_setup(char *str, int *ints); 18901 #endif CONFIG_AZTCD 18902 #ifdef CONFIG_CDU535 18903 extern void sonycd535_setup(char *str, int *ints); 18904 #endif CONFIG_CDU535 18905 #ifdef CONFIG_GSCD 18906 extern void gscd_setup(char *str, int *ints); 18907 #endif CONFIG_GSCD 18908 #ifdef CONFIG_CM206 18909 extern void cm206_setup(char *str, int *ints); 18910 #endif CONFIG_CM206 18911 #ifdef CONFIG_OPTCD 18912 extern void optcd_setup(char *str, int *ints); 18913 #endif CONFIG_OPTCD 18914 #ifdef CONFIG_SJCD 18915 extern void sjcd_setup(char *str, int *ints); 18916 #endif CONFIG_SJCD 18917 #ifdef CONFIG_ISP16_CDI 18918 extern void isp16_setup(char *str, int *ints); 18919 #endif CONFIG_ISP16_CDI 18920 #ifdef CONFIG_BLK_DEV_RAM 18921 static void ramdisk_start_setup(char *str, int *ints); 18922 static void load_ramdisk(char *str, int *ints); 18923 static void prompt_ramdisk(char *str, int *ints); 18924 static void ramdisk_size(char *str, int *ints); 18925 #ifdef CONFIG_BLK_DEV_INITRD 18926 static void no_initrd(char *s,int *ints); 18927 #endif 18928 #endif CONFIG_BLK_DEV_RAM 18929 #ifdef CONFIG_ISDN_DRV_ICN 18930 extern void icn_setup(char *str, int *ints); 18931 #endif 18932 #ifdef CONFIG_ISDN_DRV_HISAX 18933 extern void HiSax_setup(char *str, int *ints); 18934 #endif 18935 #ifdef CONFIG_DIGIEPCA 18936 extern void epca_setup(char *str, int *ints); 18937 #endif 18938 #ifdef CONFIG_ISDN_DRV_PCBIT 18939 extern void pcbit_setup(char *str, int *ints); 18940 #endif 18941 18942 #ifdef CONFIG_ATARIMOUSE 18943 extern void atari_mouse_setup (char *str, int *ints); 18944 #endif 18945 #ifdef CONFIG_DMASOUND 18946 extern void dmasound_setup (char *str, int *ints); 18947 #endif 18948 #ifdef CONFIG_ATARI_SCSI 18949 extern void atari_scsi_setup (char *str, int *ints); 18950 #endif 18951 extern void stram_swap_setup (char *str, int *ints); 18952 extern void wd33c93_setup (char *str, int *ints); 18953 extern void gvp11_setup (char *str, int *ints); 18954 extern void ncr53c7xx_setup (char *str, int *ints); 18955 #ifdef CONFIG_MAC_SCSI 18956 extern void mac_scsi_setup (char *str, int *ints); 18957 #endif 18958 18959 #ifdef CONFIG_CYCLADES 18960 extern void cy_setup(char *str, int *ints); 18961 #endif 18962 #ifdef CONFIG_DIGI 18963 extern void pcxx_setup(char *str, int *ints); 18964 #endif 18965 #ifdef CONFIG_RISCOM8 18966 extern void riscom8_setup(char *str, int *ints); 18967 #endif 18968 #ifdef CONFIG_SPECIALIX 18969 extern void specialix_setup(char *str, int *ints); 18970 #endif 18971 #ifdef CONFIG_DMASCC 18972 extern void dmascc_setup(char *str, int *ints); 18973 #endif 18974 #ifdef CONFIG_BAYCOM_PAR 18975 extern void baycom_par_setup(char *str, int *ints); 18976 #endif 18977 #ifdef CONFIG_BAYCOM_SER_FDX 18978 extern void baycom_ser_fdx_setup(char *str, int *ints); 18979 #endif 18980 #ifdef CONFIG_BAYCOM_SER_HDX 18981 extern void baycom_ser_hdx_setup(char *str, int *ints); 18982 #endif 18983 #ifdef CONFIG_SOUNDMODEM 18984 extern void sm_setup(char *str, int *ints); 18985 #endif 18986 #ifdef CONFIG_ADBMOUSE 18987 extern void adb_mouse_setup(char *str, int *ints); 18988 #endif 18989 #ifdef CONFIG_WDT 18990 extern void wdt_setup(char *str, int *ints); 18991 #endif 18992 #ifdef CONFIG_PARPORT 18993 extern void parport_setup(char *str, int *ints); 18994 #endif 18995 #ifdef CONFIG_PLIP 18996 extern void plip_setup(char *str, int *ints); 18997 #endif 18998 #ifdef CONFIG_HFMODEM 18999 extern void hfmodem_setup(char *str, int *ints); 19000 #endif 19001 #ifdef CONFIG_IP_PNP 19002 extern void ip_auto_config_setup(char *str, int *ints); 19003 #endif 19004 #ifdef CONFIG_ROOT_NFS 19005 extern void nfs_root_setup(char *str, int *ints); 19006 #endif 19007 #ifdef CONFIG_FTAPE 19008 extern void ftape_setup(char *str, int *ints); 19009 #endif 19010 #ifdef CONFIG_MDA_CONSOLE 19011 extern void mdacon_setup(char *str, int *ints); 19012 #endif 19013 #ifdef CONFIG_LTPC 19014 extern void ltpc_setup(char *str, int *ints); 19015 #endif 19016 19017 #if defined(CONFIG_SYSVIPC) 19018 extern void ipc_init(void); 19019 #endif 19020 #if defined(CONFIG_QUOTA) 19021 extern void dquot_init_hash(void); 19022 #endif 19023 19024 #ifdef CONFIG_MD_BOOT 19025 extern void md_setup(char *str,int *ints) __init; 19026 #endif 19027 19028 /* Boot command-line arguments */ 19029 #define MAX_INIT_ARGS 8 19030 #define MAX_INIT_ENVS 8 19031 19032 extern void time_init(void); 19033 19034 static unsigned long memory_start = 0; 19035 static unsigned long memory_end = 0; 19036 19037 int rows, cols; 19038 19039 #ifdef CONFIG_BLK_DEV_RAM 19040 /* 1 = load ramdisk, 0 = don't load */ 19041 extern int rd_doload; 19042 /* 1 = prompt for ramdisk, 0 = don't prompt */ 19043 extern int rd_prompt; 19044 /* Size of the ramdisk(s) */ 19045 extern int rd_size; 19046 /* starting block # of image */ 19047 extern int rd_image_start; 19048 19049 #ifdef CONFIG_BLK_DEV_INITRD 19050 kdev_t real_root_dev; 19051 #endif 19052 #endif 19053 19054 int root_mountflags = MS_RDONLY; 19055 char *execute_command = NULL; 19056 19057 static char * argv_init[MAX_INIT_ARGS+2] = 19058 { "init", NULL, }; 19059 static char * envp_init[MAX_INIT_ENVS+2] = 19060 { "HOME=/", "TERM=linux", NULL, }; 19061 19062 char *get_options(char *str, int *ints) 19063 { 19064 char *cur = str; 19065 int i=1; 19066 19067 while (cur && (*cur=='-' isdigit(*cur)) && i <= 10){ 19068 ints[i++] = simple_strtol(cur,NULL,0); 19069 if ((cur = strchr(cur,',')) != NULL) 19070 cur++; 19071 } 19072 ints[0] = i-1; 19073 return(cur); 19074 } 19075


19076 static void __init profile_setup(char *str, int *ints) 19077 { 19078 if (ints[0] > 0) 19079 prof_shift = (unsigned long) ints[1]; 19080 else 19081 prof_shift = 2; 19082 } 19083 19084 19085 static struct dev_name_struct { 19086 const char *name; 19087 const int num; 19088 } root_dev_names[] __initdata = { 19089 #ifdef CONFIG_ROOT_NFS 19090 { "nfs", 0x00ff }, 19091 #endif 19092 #ifdef CONFIG_BLK_DEV_IDE 19093 { "hda", 0x0300 }, 19094 { "hdb", 0x0340 }, 19095 { "hdc", 0x1600 }, 19096 { "hdd", 0x1640 }, 19097 { "hde", 0x2100 }, 19098 { "hdf", 0x2140 }, 19099 { "hdg", 0x2200 }, 19100 { "hdh", 0x2240 }, 19101 { "hdi", 0x3800 }, 19102 { "hdj", 0x3840 }, 19103 { "hdk", 0x3900 }, 19104 { "hdl", 0x3940 }, 19105 #endif 19106 #ifdef CONFIG_BLK_DEV_SD 19107 { "sda", 0x0800 }, 19108 { "sdb", 0x0810 }, 19109 { "sdc", 0x0820 }, 19110 { "sdd", 0x0830 }, 19111 { "sde", 0x0840 }, 19112 { "sdf", 0x0850 }, 19113 { "sdg", 0x0860 }, 19114 { "sdh", 0x0870 }, 19115 { "sdi", 0x0880 }, 19116 { "sdj", 0x0890 }, 19117 { "sdk", 0x08a0 }, 19118 { "sdl", 0x08b0 }, 19119 { "sdm", 0x08c0 }, 19120 { "sdn", 0x08d0 }, 19121 { "sdo", 0x08e0 }, 19122 { "sdp", 0x08f0 }, 19123 #endif 19124 #ifdef CONFIG_ATARI_ACSI 19125 { "ada", 0x1c00 }, 19126 { "adb", 0x1c10 }, 19127 { "adc", 0x1c20 }, 19128 { "add", 0x1c30 }, 19129 { "ade", 0x1c40 }, 19130 #endif 19131 #ifdef CONFIG_BLK_DEV_FD 19132 { "fd", 0x0200 }, 19133 #endif 19134 #ifdef CONFIG_MD_BOOT 19135 { "md", 0x0900 }, 19136 #endif 19137 #ifdef CONFIG_BLK_DEV_XD 19138 { "xda", 0x0d00 }, 19139 { "xdb", 0x0d40 }, 19140 #endif 19141 #ifdef CONFIG_BLK_DEV_RAM 19142 { "ram", 0x0100 }, 19143 #endif 19144 #ifdef CONFIG_BLK_DEV_SR 19145 { "scd", 0x0b00 }, 19146 #endif 19147 #ifdef CONFIG_MCD 19148 { "mcd", 0x1700 }, 19149 #endif 19150 #ifdef CONFIG_CDU535 19151 { "cdu535", 0x1800 }, 19152 { "sonycd", 0x1800 }, 19153 #endif 19154 #ifdef CONFIG_AZTCD 19155 { "aztcd", 0x1d00 }, 19156 #endif 19157 #ifdef CONFIG_CM206 19158 { "cm206cd", 0x2000 }, 19159 #endif 19160 #ifdef CONFIG_GSCD 19161 { "gscd", 0x1000 }, 19162 #endif 19163 #ifdef CONFIG_SBPCD 19164 { "sbpcd", 0x1900 }, 19165 #endif 19166 #ifdef CONFIG_BLK_DEV_PS2 19167 { "eda", 0x2400 }, 19168 { "edb", 0x2440 }, 19169 #endif 19170 #ifdef CONFIG_PARIDE_PD 19171 { "pda", 0x2d00 }, 19172 { "pdb", 0x2d10 }, 19173 { "pdc", 0x2d20 }, 19174 { "pdd", 0x2d30 }, 19175 #endif 19176 #ifdef CONFIG_PARIDE_PCD 19177 { "pcd", 0x2e00 }, 19178 #endif 19179 #ifdef CONFIG_PARIDE_PF 19180 { "pf", 0x2f00 }, 19181 #endif 19182 #if CONFIG_APBLOCK 19183 { "apblock", APBLOCK_MAJOR << 8}, 19184 #endif 19185 #if CONFIG_DDV 19186 { "ddv", DDV_MAJOR << 8}, 19187 #endif 19188 { NULL, 0 } 19189 }; 19190 19191 kdev_t __init name_to_kdev_t(char *line) 19192 { 19193 int base = 0; 19194 if (strncmp(line,"/dev/",5) == 0) { 19195 struct dev_name_struct *dev = root_dev_names; 19196 line += 5; 19197 do { 19198 int len = strlen(dev->name); 19199 if (strncmp(line,dev->name,len) == 0) { 19200 line += len; 19201 base = dev->num; 19202 break; 19203 } 19204 dev++; 19205 } while (dev->name); 19206 } 19207 return to_kdev_t(base + simple_strtoul(line,NULL, 19208 base ? 10 : 16)); 19209 } 19210 19211 static void __init root_dev_setup(char *line, int *num) 19212 { 19213 ROOT_DEV = name_to_kdev_t(line); 19214 } 19215 19216 /* List of kernel command line parameters. The first 19217 * table lists parameters which are subject to values 19218 * parsing (leading numbers are converted to an array of 19219 * ints and chopped off the string), the second table 19220 * contains the few exceptions which obey their own 19221 * syntax rules. */ 19222 19223 struct kernel_param { 19224 const char *str; 19225 void (*setup_func)(char *, int *); 19226 }; 19227 19228 static struct kernel_param cooked_params[] __initdata = { 19229 /* FIXME: make PNP just become reserve_setup */ 19230 #ifndef CONFIG_KERNEL_PNP_RESOURCE 19231 { "reserve=", reserve_setup }, 19232 #else 19233 { "reserve=", pnp_reserve_setup }, 19234 #endif 19235 { "profile=", profile_setup }, 19236 #ifdef __SMP__ 19237 { "nosmp", smp_setup }, 19238 { "maxcpus=", smp_setup }, 19239 #ifdef CONFIG_X86_IO_APIC 19240 { "noapic", ioapic_setup }, 19241 { "pirq=", ioapic_pirq_setup }, 19242 #endif 19243 #endif 19244 #ifdef CONFIG_BLK_DEV_RAM 19245 { "ramdisk_start=", ramdisk_start_setup }, 19246 { "load_ramdisk=", load_ramdisk }, 19247 { "prompt_ramdisk=", prompt_ramdisk }, 19248 { "ramdisk=", ramdisk_size }, 19249 { "ramdisk_size=", ramdisk_size }, 19250 #ifdef CONFIG_BLK_DEV_INITRD 19251 { "noinitrd", no_initrd }, 19252 #endif 19253 #endif 19254 #ifdef CONFIG_FB 19255 { "video=", video_setup }, 19256 #endif 19257 { "panic=", panic_setup }, 19258 { "console=", console_setup }, 19259 #ifdef CONFIG_VGA_CONSOLE 19260 { "no-scroll", no_scroll }, 19261 #endif 19262 #ifdef CONFIG_MDA_CONSOLE 19263 { "mdacon=", mdacon_setup }, 19264 #endif 19265 #ifdef CONFIG_VT 19266 { "kbd-reset", kbd_reset_setup }, 19267 #endif 19268 #ifdef CONFIG_BUGi386 19269 { "no-hlt", no_halt }, 19270 { "no387", no_387 }, 19271 { "reboot=", reboot_setup }, 19272 #endif 19273 #ifdef CONFIG_INET 19274 { "ether=", eth_setup }, 19275 #endif 19276 #ifdef CONFIG_ARCNET_COM20020 19277 { "com20020=", com20020_setup }, 19278 #endif 19279 #ifdef CONFIG_ARCNET_RIM_I 19280 { "arcrimi=", arcrimi_setup }, 19281 #endif 19282 #ifdef CONFIG_ARCNET_COM90xxIO 19283 { "com90io=", com90io_setup }, 19284 #endif 19285 #ifdef CONFIG_ARCNET_COM90xx 19286 { "com90xx=", com90xx_setup }, 19287 #endif 19288 #ifdef CONFIG_DECNET 19289 { "decnet=", decnet_setup }, 19290 #endif 19291 #ifdef CONFIG_PRINTER 19292 { "lp=", lp_setup }, 19293 #endif 19294 #ifdef CONFIG_JOY_AMIGA 19295 { "js_am=", js_am_setup }, 19296 #endif 19297 #ifdef CONFIG_JOY_ANALOG 19298 { "js_an=", js_an_setup }, 19299 #endif 19300 #ifdef CONFIG_JOY_ASSASIN 19301 { "js_as=", js_as_setup }, 19302 #endif 19303 #ifdef CONFIG_JOY_CONSOLE 19304 { "js_console=", js_console_setup }, 19305 { "js_console2=", js_console_setup }, 19306 { "js_console3=", js_console_setup }, 19307 #endif 19308 #ifdef CONFIG_JOY_DB9 19309 { "js_db9=", js_db9_setup }, 19310 { "js_db9_2=", js_db9_setup }, 19311 { "js_db9_3=", js_db9_setup }, 19312 #endif 19313 #ifdef CONFIG_JOY_TURBOGRAFX 19314 { "js_tg=", js_tg_setup }, 19315 { "js_tg_2=", js_tg_setup }, 19316 { "js_tg_3=", js_tg_setup }, 19317 #endif 19318 #ifdef CONFIG_SCSI 19319 { "max_scsi_luns=", scsi_luns_setup }, 19320 { "scsi_logging=", scsi_logging_setup }, 19321 #endif 19322 #ifdef CONFIG_JOY_LIGHTNING 19323 { "js_l4=", js_l4_setup }, 19324 #endif 19325 #ifdef CONFIG_SCSI_ADVANSYS 19326 { "advansys=", advansys_setup }, 19327 #endif 19328 #if defined(CONFIG_BLK_DEV_HD) 19329 { "hd=", hd_setup }, 19330 #endif 19331 #ifdef CONFIG_CHR_DEV_ST 19332 { "st=", st_setup }, 19333 #endif 19334 #ifdef CONFIG_BUSMOUSE 19335 { "bmouse=", bmouse_setup }, 19336 #endif 19337 #ifdef CONFIG_MS_BUSMOUSE 19338 { "msmouse=", msmouse_setup }, 19339 #endif 19340 #ifdef CONFIG_SCSI_SEAGATE 19341 { "st0x=", st0x_setup }, 19342 { "tmc8xx=", tmc8xx_setup }, 19343 #endif 19344 #ifdef CONFIG_SCSI_T128 19345 { "t128=", t128_setup }, 19346 #endif 19347 #ifdef CONFIG_SCSI_PAS16 19348 { "pas16=", pas16_setup }, 19349 #endif 19350 #ifdef CONFIG_SCSI_GENERIC_NCR5380 19351 { "ncr5380=", generic_NCR5380_setup }, 19352 { "ncr53c400=", generic_NCR53C400_setup }, 19353 { "ncr53c400a=", generic_NCR53C400A_setup }, 19354 { "dtc3181e=", generic_DTC3181E_setup }, 19355 #endif 19356 #ifdef CONFIG_SCSI_AHA152X 19357 { "aha152x=", aha152x_setup}, 19358 #endif 19359 #ifdef CONFIG_SCSI_AHA1542 19360 { "aha1542=", aha1542_setup}, 19361 #endif 19362 #ifdef CONFIG_SCSI_GDTH 19363 { "gdth=", gdth_setup}, 19364 #endif 19365 #ifdef CONFIG_SCSI_AIC7XXX 19366 { "aic7xxx=", aic7xxx_setup}, 19367 #endif 19368 #ifdef CONFIG_SCSI_BUSLOGIC 19369 { "BusLogic=", BusLogic_Setup}, 19370 #endif 19371 #ifdef CONFIG_SCSI_NCR53C8XX 19372 { "ncr53c8xx=", ncr53c8xx_setup}, 19373 #endif 19374 #ifdef CONFIG_SCSI_EATA 19375 { "eata=", eata2x_setup}, 19376 #endif 19377 #ifdef CONFIG_SCSI_U14_34F 19378 { "u14-34f=", u14_34f_setup}, 19379 #endif 19380 #ifdef CONFIG_SCSI_AM53C974 19381 { "AM53C974=", AM53C974_setup}, 19382 #endif 19383 #ifdef CONFIG_SCSI_NCR53C406A 19384 { "ncr53c406a=", NCR53c406a_setup}, 19385 #endif 19386 #ifdef CONFIG_SCSI_SYM53C416 19387 { "sym53c416=", sym53c416_setup}, 19388 #endif 19389 #ifdef CONFIG_SCSI_FUTURE_DOMAIN 19390 { "fdomain=", fdomain_setup}, 19391 #endif 19392 #ifdef CONFIG_SCSI_IN2000 19393 { "in2000=", in2000_setup}, 19394 #endif 19395 #ifdef CONFIG_SCSI_7000FASST 19396 { "wd7000=", wd7000_setup}, 19397 #endif 19398 #ifdef CONFIG_SCSI_IBMMCA 19399 { "ibmmcascsi=", ibmmca_scsi_setup }, 19400 #endif 19401 #if defined(CONFIG_SCSI_DC390T) && \ 19402 !defined(CONFIG_SCSI_DC390T_NOGENSUPP) 19403 { "tmscsim=", dc390_setup }, 19404 #endif 19405 #ifdef CONFIG_BLK_DEV_XD 19406 { "xd=", xd_setup }, 19407 { "xd_geo=", xd_manual_geo_init }, 19408 #endif 19409 #if defined(CONFIG_BLK_DEV_FD) \ 19410 defined(CONFIG_AMIGA_FLOPPY) \ 19411 defined(CONFIG_ATARI_FLOPPY) 19412 { "floppy=", floppy_setup }, 19413 #endif 19414 #ifdef CONFIG_BLK_DEV_PS2 19415 { "eda=", ed_setup }, 19416 { "edb=", ed_setup }, 19417 { "tp720=", tp720_setup }, 19418 #endif 19419 #ifdef CONFIG_CDU31A 19420 { "cdu31a=", cdu31a_setup }, 19421 #endif CONFIG_CDU31A 19422 #ifdef CONFIG_MCD 19423 { "mcd=", mcd_setup }, 19424 #endif CONFIG_MCD 19425 #ifdef CONFIG_MCDX 19426 { "mcdx=", mcdx_setup }, 19427 #endif CONFIG_MCDX 19428 #ifdef CONFIG_SBPCD 19429 { "sbpcd=", sbpcd_setup }, 19430 #endif CONFIG_SBPCD 19431 #ifdef CONFIG_AZTCD 19432 { "aztcd=", aztcd_setup }, 19433 #endif CONFIG_AZTCD 19434 #ifdef CONFIG_CDU535 19435 { "sonycd535=", sonycd535_setup }, 19436 #endif CONFIG_CDU535 19437 #ifdef CONFIG_GSCD 19438 { "gscd=", gscd_setup }, 19439 #endif CONFIG_GSCD 19440 #ifdef CONFIG_CM206 19441 { "cm206=", cm206_setup }, 19442 #endif CONFIG_CM206 19443 #ifdef CONFIG_OPTCD 19444 { "optcd=", optcd_setup }, 19445 #endif CONFIG_OPTCD 19446 #ifdef CONFIG_SJCD 19447 { "sjcd=", sjcd_setup }, 19448 #endif CONFIG_SJCD 19449 #ifdef CONFIG_ISP16_CDI 19450 { "isp16=", isp16_setup }, 19451 #endif CONFIG_ISP16_CDI 19452 #ifdef CONFIG_SOUND_OSS 19453 { "sound=", sound_setup }, 19454 #endif 19455 #ifdef CONFIG_ISDN_DRV_ICN 19456 { "icn=", icn_setup }, 19457 #endif 19458 #ifdef CONFIG_ISDN_DRV_HISAX 19459 { "hisax=", HiSax_setup }, 19460 { "HiSax=", HiSax_setup }, 19461 #endif 19462 #ifdef CONFIG_ISDN_DRV_PCBIT 19463 { "pcbit=", pcbit_setup }, 19464 #endif 19465 #ifdef CONFIG_ATARIMOUSE 19466 { "atamouse=", atari_mouse_setup }, 19467 #endif 19468 #ifdef CONFIG_DMASOUND 19469 { "dmasound=", dmasound_setup }, 19470 #endif 19471 #ifdef CONFIG_ATARI_SCSI 19472 { "atascsi=", atari_scsi_setup }, 19473 #endif 19474 #ifdef CONFIG_STRAM_SWAP 19475 { "stram_swap=", stram_swap_setup }, 19476 #endif 19477 #if defined(CONFIG_A4000T_SCSI) \ 19478 defined(CONFIG_WARPENGINE_SCSI) \ 19479 defined(CONFIG_A4091_SCSI) \ 19480 defined(CONFIG_MVME16x_SCSI) \ 19481 defined(CONFIG_BVME6000_SCSI) 19482 { "53c7xx=", ncr53c7xx_setup }, 19483 #endif 19484 #if defined(CONFIG_A3000_SCSI) \ 19485 defined(CONFIG_A2091_SCSI) \ 19486 defined(CONFIG_GVP11_SCSI) 19487 { "wd33c93=", wd33c93_setup }, 19488 #endif 19489 #if defined(CONFIG_GVP11_SCSI) 19490 { "gvp11=", gvp11_setup }, 19491 #endif 19492 #ifdef CONFIG_MAC_SCSI 19493 { "mac5380=", mac_scsi_setup }, 19494 #endif 19495 #ifdef CONFIG_CYCLADES 19496 { "cyclades=", cy_setup }, 19497 #endif 19498 #ifdef CONFIG_DIGI 19499 { "digi=", pcxx_setup }, 19500 #endif 19501 #ifdef CONFIG_DIGIEPCA 19502 { "digiepca=", epca_setup }, 19503 #endif 19504 #ifdef CONFIG_RISCOM8 19505 { "riscom8=", riscom8_setup }, 19506 #endif 19507 #ifdef CONFIG_DMASCC 19508 { "dmascc=", dmascc_setup }, 19509 #endif 19510 #ifdef CONFIG_SPECIALIX 19511 { "specialix=", specialix_setup }, 19512 #endif 19513 #ifdef CONFIG_BAYCOM_PAR 19514 { "baycom_par=", baycom_par_setup }, 19515 #endif 19516 #ifdef CONFIG_BAYCOM_SER_FDX 19517 { "baycom_ser_fdx=", baycom_ser_fdx_setup }, 19518 #endif 19519 #ifdef CONFIG_BAYCOM_SER_HDX 19520 { "baycom_ser_hdx=", baycom_ser_hdx_setup }, 19521 #endif 19522 #ifdef CONFIG_SOUNDMODEM 19523 { "soundmodem=", sm_setup }, 19524 #endif 19525 #ifdef CONFIG_WDT 19526 { "wdt=", wdt_setup }, 19527 #endif 19528 #ifdef CONFIG_PARPORT 19529 { "parport=", parport_setup }, 19530 #endif 19531 #ifdef CONFIG_PLIP 19532 { "plip=", plip_setup }, 19533 #endif 19534 #ifdef CONFIG_HFMODEM 19535 { "hfmodem=", hfmodem_setup }, 19536 #endif 19537 #ifdef CONFIG_FTAPE 19538 { "ftape=", ftape_setup}, 19539 #endif 19540 #ifdef CONFIG_MD_BOOT 19541 { "md=", md_setup}, 19542 #endif 19543 #ifdef CONFIG_ADBMOUSE 19544 { "adb_buttons=", adb_mouse_setup }, 19545 #endif 19546 #ifdef CONFIG_LTPC 19547 { "ltpc=", ltpc_setup }, 19548 #endif 19549 { 0, 0 } 19550 }; 19551 19552 static struct kernel_param raw_params[] __initdata = { 19553 { "root=", root_dev_setup }, 19554 #ifdef CONFIG_ROOT_NFS 19555 { "nfsroot=", nfs_root_setup }, 19556 { "nfsaddrs=", ip_auto_config_setup }, 19557 #endif 19558 #ifdef CONFIG_IP_PNP 19559 { "ip=", ip_auto_config_setup }, 19560 #endif 19561 #ifdef CONFIG_PCI 19562 { "pci=", pci_setup }, 19563 #endif 19564 #ifdef CONFIG_PARIDE_PD 19565 { "pd.", pd_setup }, 19566 #endif 19567 #ifdef CONFIG_PARIDE_PCD 19568 { "pcd.", pcd_setup }, 19569 #endif 19570 #ifdef CONFIG_PARIDE_PF 19571 { "pf.", pf_setup }, 19572 #endif 19573 #ifdef CONFIG_PARIDE_PT 19574 { "pt.", pt_setup }, 19575 #endif 19576 #ifdef CONFIG_PARIDE_PG 19577 { "pg.", pg_setup }, 19578 #endif 19579 #ifdef CONFIG_APM 19580 { "apm=", apm_setup }, 19581 #endif 19582 { 0, 0 } 19583 }; 19584 19585 #ifdef CONFIG_BLK_DEV_RAM 19586 static void __init ramdisk_start_setup(char *str, 19587 int *ints) 19588 { 19589 if (ints[0] > 0 && ints[1] >= 0) 19590 rd_image_start = ints[1]; 19591 } 19592 19593 static void __init load_ramdisk(char *str, int *ints) 19594 { 19595 if (ints[0] > 0 && ints[1] >= 0) 19596 rd_doload = ints[1] & 1; 19597 } 19598 19599 static void __init prompt_ramdisk(char *str, int *ints) 19600 { 19601 if (ints[0] > 0 && ints[1] >= 0) 19602 rd_prompt = ints[1] & 1; 19603 } 19604 19605 static void __init ramdisk_size(char *str, int *ints) 19606 { 19607 if (ints[0] > 0 && ints[1] >= 0) 19608 rd_size = ints[1]; 19609 } 19610 #endif 19611



19612 static int __init checksetup(char *line) 19613 { 19614 int i, ints[11]; 19615 19616 #ifdef CONFIG_BLK_DEV_IDE 19617 /* ide driver needs the basic string, rather than 19618 * pre-processed values */ 19619 if (!strncmp(line,"ide",3) 19620 (!strncmp(line,"hd",2) && line[2] != '=')) { 19621 ide_setup(line); 19622 return 1; 19623 } 19624 #endif 19625 for (i=0; raw_params[i].str; i++) { 19626 int n = strlen(raw_params[i].str); 19627 if (!strncmp(line,raw_params[i].str,n)) { 19628 raw_params[i].setup_func(line+n, NULL); 19629 return 1; 19630 } 19631 }

19632 for (i=0; cooked_params[i].str; i++) { 19633 int n = strlen(cooked_params[i].str); 19634 if (!strncmp(line,cooked_params[i].str,n)) { 19635 cooked_params[i].setup_func(get_options(line+n, 19636 ints), ints); 19637 return 1; 19638 } 19639 } 19640 return 0; 19641 } 19642 19643 /* this should be approx 2 Bo*oMips to start (note 19644 * initial shift), and will still work even if initially 19645 * too large, it will just take slightly longer */ 19646 unsigned long loops_per_sec = (1<<12); 19647 19648 /* This is the number of bits of precision for the 19649 * loops_per_second. Each bit takes on average 1.5/HZ 19650 * seconds. This (like the original) is a little better 19651 * than 1% */ 19652 #define LPS_PREC 8 19653

19654 void __init calibrate_delay(void) 19655 { 19656 unsigned long ticks, loopbit; 19657 int lps_precision = LPS_PREC; 19658 19659 loops_per_sec = (1<<12); 19660 19661 printk("Calibrating delay loop... "); 19662 while (loops_per_sec <<= 1) { 19663 /* wait for "start of" clock tick */ 19664 ticks = jiffies; 19665 while (ticks == jiffies) 19666 /* nothing */; 19667 /* Go .. */ 19668 ticks = jiffies;

19669 __delay(loops_per_sec); 19670 ticks = jiffies - ticks; 19671 if (ticks) 19672 break; 19673 } 19674 19675 /* Do a binary approximation to get loops_per_second set 19676 * to equal one clock (up to lps_precision bits) */ 19677 loops_per_sec >>= 1; 19678 loopbit = loops_per_sec; 19679 while ( lps_precision-- && (loopbit >>= 1) ) { 19680 loops_per_sec |= loopbit; 19681 ticks = jiffies; 19682 while (ticks == jiffies); 19683 ticks = jiffies; 19684 __delay(loops_per_sec); 19685 if (jiffies != ticks) /* longer than 1 tick */ 19686 loops_per_sec &= ~loopbit; 19687 } 19688 19689 /* finally, adjust loops per second in terms of seconds 19690 * instead of clocks */ 19691 loops_per_sec *= HZ; 19692 /* Round the value and print it */ 19693 printk("%lu.%02lu BogoMIPS\n", 19694 (loops_per_sec+2500)/500000, 19695 ((loops_per_sec+2500)/5000) % 100); 19696 } 19697 19698 /* This is a simple kernel command line parsing function: 19699 * it parses the command line, and fills in the 19700 * arguments/environment to init as appropriate. Any 19701 * cmd-line option is taken to be an environment variable 19702 * if it contains the character '='. 19703 * 19704 * This routine also checks for options meant for the 19705 * kernel. These options are not given to init - they 19706 * are for internal kernel use only. */



19707 static void __init parse_options(char *line) 19708 { 19709 char *next; 19710 int args, envs; 19711 19712 if (!*line) 19713 return; 19714 args = 0; 19715 envs = 1; /* TERM is set to 'linux' by default */ 19716 next = line; 19717 while ((line = next) != NULL) { 19718 if ((next = strchr(line,' ')) != NULL) 19719 *next++ = 0; 19720 /* check for kernel options first.. */ 19721 if (!strcmp(line,"ro")) { 19722 root_mountflags |= MS_RDONLY; 19723 continue; 19724 } 19725 if (!strcmp(line,"rw")) { 19726 root_mountflags &= ~MS_RDONLY; 19727 continue; 19728 } 19729 if (!strcmp(line,"debug")) { 19730 console_loglevel = 10; 19731 continue; 19732 } 19733 if (!strncmp(line,"init=",5)) { 19734 line += 5; 19735 execute_command = line; 19736 /* In case LILO is going to boot us with default 19737 * command line, it prepends "auto" before the 19738 * whole cmdline which makes the shell think it 19739 * should execute a script with such name. So we 19740 * ignore all arguments entered _before_ 19741 * init=... [MJ] */ 19742 args = 0; 19743 continue; 19744 }

19745 if (checksetup(line)) 19746 continue; 19747 19748 /* Then check if it's an environment variable or an 19749 * option. */ 19750 if (strchr(line,'=')) { 19751 if (envs >= MAX_INIT_ENVS) 19752 break; 19753 envp_init[++envs] = line; 19754 } else { 19755 if (args >= MAX_INIT_ARGS) 19756 break; 19757 argv_init[++args] = line; 19758 } 19759 } 19760 argv_init[args+1] = NULL; 19761 envp_init[envs+1] = NULL; 19762 } 19763 19764 19765 extern void setup_arch(char **, unsigned long *, 19766 unsigned long *); 19767 19768 #ifndef __SMP__ 19769 19770 /* Uniprocessor idle thread */ 19771 19772 int cpu_idle(void *unused) 19773 { 19774 for(;;) 19775 idle(); 19776 } 19777 19778 #define smp_init() do { } while (0) 19779 19780 #else 19781 19782 /* Multiprocessor idle thread is in arch/... */ 19783 19784 extern int cpu_idle(void * unused); 19785 19786 /* Called by boot processor to activate the rest. */ 19787 static void __init smp_init(void) 19788 { 19789 /* Get other processors into their bootup holding 19790 * patterns. */ 19791 smp_boot_cpus(); 19792 smp_threads_ready=1; 19793 smp_commence(); 19794 } 19795 19796 #endif 19797 19798 extern void initialize_secondary(void); 19799 19800 /* Activate the first processor. */ 19801



19802 asmlinkage void __init start_kernel(void) 19803 { 19804 char * command_line; 19805 19806 # ifdef __SMP__ 19807 static int boot_cpu = 1; 19808 /* "current" has been set up, we need to load it now */ 19809 if (!boot_cpu) 19810 initialize_secondary(); 19811 boot_cpu = 0; 19812 #endif 19813 19814 /* Interrupts are still disabled. Do necessary setups, 19815 * then enable them */ 19816 printk(linux_banner); 19817 setup_arch(&command_line, &memory_start, &memory_end); 19818 memory_start = paging_init(memory_start,memory_end); 19819 trap_init(); 19820 init_IRQ(); 19821 sched_init(); 19822 time_init(); 19823 parse_options(command_line); 19824 19825 /* HACK ALERT! This is early. We're enabling the 19826 * console before we've done PCI setups etc, and 19827 * console_init() must be aware of this. But we do want 19828 * output early, in case something goes wrong. */ 19829 memory_start = console_init(memory_start,memory_end); 19830 #ifdef CONFIG_MODULES 19831 init_modules(); 19832 #endif 19833 if (prof_shift) { 19834 prof_buffer = (unsigned int *) memory_start; 19835 /* only text is profiled */ 19836 prof_len = (unsigned long) &_etext - 19837 (unsigned long) &_stext; 19838 prof_len >>= prof_shift; 19839 memory_start += prof_len * sizeof(unsigned int); 19840 memset(prof_buffer, 0, 19841 prof_len * sizeof(unsigned int)); 19842 } 19843 19844 memory_start = kmem_cache_init(memory_start, 19845 memory_end);

19846 sti(); 19847 calibrate_delay(); 19848 #ifdef CONFIG_BLK_DEV_INITRD 19849 if (initrd_start && !initrd_below_start_ok && 19850 initrd_start < memory_start) { 19851 printk(KERN_CRIT 19852 "initrd overwritten (0x%08lx < 0x%08lx) - " 19853 "disabling it.\n", initrd_start,memory_start); 19854 initrd_start = 0; 19855 } 19856 #endif 19857 mem_init(memory_start,memory_end); 19858 kmem_cache_sizes_init(); 19859 #ifdef CONFIG_PROC_FS 19860 proc_root_init(); 19861 #endif 19862 uidcache_init(); 19863 filescache_init(); 19864 dcache_init(); 19865 vma_init(); 19866 buffer_init(); 19867 signals_init(); 19868 inode_init(); 19869 file_table_init(); 19870 #if defined(CONFIG_SYSVIPC) 19871 ipc_init(); 19872 #endif 19873 #if defined(CONFIG_QUOTA) 19874 dquot_init_hash(); 19875 #endif 19876 check_bugs(); 19877 printk("POSIX conformance testing by UNIFIX\n"); 19878 19879 /* We count on the initial thread going ok Like idlers 19880 * init is an unlocked kernel thread, which will make 19881 * syscalls (and thus be locked). */ 19882 smp_init(); 19883 kernel_thread(init, NULL, 19884 CLONE_FS | CLONE_FILES | CLONE_SIGHAND); 19885 current->need_resched = 1; 19886 cpu_idle(NULL); 19887 } 19888 19889 #ifdef CONFIG_BLK_DEV_INITRD 19890 static int do_linuxrc(void * shell) 19891 { 19892 static char *argv[] = { "linuxrc", NULL, }; 19893 19894 close(0);close(1);close(2); 19895 setsid(); 19896 (void) open("/dev/console",O_RDWR,0); 19897 (void) dup(0); 19898 (void) dup(0); 19899 return execve(shell, argv, envp_init); 19900 } 19901 19902 static void __init no_initrd(char *s,int *ints) 19903 { 19904 mount_initrd = 0; 19905 } 19906 #endif 19907 19908 struct task_struct *child_reaper = &init_task; 19909 19910 /* Ok, the machine is now initialized. None of the 19911 * devices have been touched yet, but the CPU subsystem 19912 * is up and running, and memory and process management 19913 * works. 19914 * 19915 * Now we can finally start doing some real work.. */ 19916 static void __init do_basic_setup(void) 19917 { 19918 #ifdef CONFIG_BLK_DEV_INITRD 19919 int real_root_mountflags; 19920 #endif 19921 19922 /* Tell the world that we're going to be the grim 19923 * reaper of innocent orphaned children. 19924 * 19925 * We don't want people to have to make incorrect 19926 * assumptions about where in the task array this can 19927 * be found. */ 19928 child_reaper = current; 19929 19930 #if defined(CONFIG_MTRR) /* After SMP initialization */ 19931 /* We should probably create some architecture-dependent 19932 * "fixup after everything is up" style function where 19933 * this would belong better than in init/main.c.. */ 19934 mtrr_init(); 19935 #endif 19936 19937 #ifdef CONFIG_SYSCTL 19938 sysctl_init(); 19939 #endif 19940 19941 /* Ok, at this point all CPU's should be initialized, 19942 * so we can start looking into devices.. */ 19943 #ifdef CONFIG_PCI 19944 pci_init(); 19945 #endif 19946 #ifdef CONFIG_SBUS 19947 sbus_init(); 19948 #endif 19949 #if defined(CONFIG_PPC) 19950 powermac_init(); 19951 #endif 19952 #ifdef CONFIG_MCA 19953 mca_init(); 19954 #endif 19955 #ifdef CONFIG_ARCH_ACORN 19956 ecard_init(); 19957 #endif 19958 #ifdef CONFIG_ZORRO 19959 zorro_init(); 19960 #endif 19961 #ifdef CONFIG_DIO 19962 dio_init(); 19963 #endif 19964 19965 /* Net initialization needs a process context */ 19966 sock_init(); 19967 19968 /* Launch bdflush from here, instead of the old syscall 19969 * way. */ 19970 kernel_thread(bdflush, NULL, 19971 CLONE_FS | CLONE_FILES | CLONE_SIGHAND); 19972 /* Start the background pageout daemon. */ 19973 kswapd_setup(); 19974 kernel_thread(kpiod, NULL, 19975 CLONE_FS | CLONE_FILES | CLONE_SIGHAND); 19976 kernel_thread(kswapd, NULL, 19977 CLONE_FS | CLONE_FILES | CLONE_SIGHAND); 19978 19979 #if CONFIG_AP1000 19980 /* Start the async paging daemon. */ 19981 { 19982 extern int asyncd(void *); 19983 kernel_thread(asyncd, NULL, 19984 CLONE_FS | CLONE_FILES | CLONE_SIGHAND); 19985 } 19986 #endif 19987 19988 #ifdef CONFIG_BLK_DEV_INITRD 19989 19990 real_root_dev = ROOT_DEV; 19991 real_root_mountflags = root_mountflags; 19992 if (initrd_start && mount_initrd) 19993 root_mountflags &= ~MS_RDONLY; 19994 else mount_initrd =0; 19995 #endif 19996 19997 /* Set up devices .. */ 19998 device_setup(); 19999 20000 /* .. executable formats .. */ 20001 binfmt_setup(); 20002 20003 /* .. filesystems .. */ 20004 filesystem_setup(); 20005 20006 /* Mount the root filesystem.. */ 20007 mount_root(); 20008 20009 #ifdef CONFIG_UMSDOS_FS 20010 { 20011 /* When mounting a umsdos fs as root, we detect the 20012 * pseudo_root (/linux) and initialise it here. 20013 * pseudo_root is defined in fs/umsdos/inode.c */ 20014 extern struct inode *pseudo_root; 20015 if (pseudo_root != NULL){ 20016 current->fs->root = pseudo_root->i_sb->s_root; 20017 current->fs->pwd = pseudo_root->i_sb->s_root; 20018 } 20019 } 20020 #endif 20021 20022 #ifdef CONFIG_BLK_DEV_INITRD 20023 root_mountflags = real_root_mountflags; 20024 if (mount_initrd && ROOT_DEV != real_root_dev 20025 && MAJOR(ROOT_DEV) == RAMDISK_MAJOR 20026 && MINOR(ROOT_DEV) == 0) { 20027 int error; 20028 int i, pid; 20029 20030 pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD); 20031 if (pid>0) 20032 while (pid != wait(&i)); 20033 if (MAJOR(real_root_dev) != RAMDISK_MAJOR 20034 MINOR(real_root_dev) != 0) { 20035 error = change_root(real_root_dev,"/initrd"); 20036 if (error) 20037 printk(KERN_ERR "Change root to /initrd: " 20038 "error %d\n",error); 20039 } 20040 } 20041 #endif 20042 } 20043



20044 static int init(void * unused) 20045 {

20046 lock_kernel(); 20047 do_basic_setup(); 20048 20049 /* OK, we have completed the initial bootup, and we're 20050 * essentially up and running. Get rid of the initmem 20051 * segments and start the user-mode stuff.. */ 20052 free_initmem(); 20053 unlock_kernel(); 20054 20055 if (open("/dev/console", O_RDWR, 0) < 0) 20056 printk("Warning: unable to open an initial " 20057 "console.\n"); 20058 20059 (void) dup(0); 20060 (void) dup(0); 20061 20062 /* We try each of these until one succeeds. 20063 * 20064 * The Bourne shell can be used instead of init if we 20065 * are trying to recover a really broken machine. */ 20066 20067 if (execute_command) 20068 execve(execute_command,argv_init,envp_init); 20069 execve("/sbin/init",argv_init,envp_init); 20070 execve("/etc/init",argv_init,envp_init); 20071 execve("/bin/init",argv_init,envp_init); 20072 execve("/bin/sh",argv_init,envp_init); 20073 panic("No init found. " 20074 "Try passing init= option to kernel."); 20075 }


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