main.c,v

powerpc内核mpc8241linux系统下init驱动程序

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1.1
date	2000.09.14.02.02.13;	author sjzhu;	state Exp;
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@debug for OCTOPUS, why enter into machine_halt()
@


1.1
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@Initial revision
@
text
@/*
 *  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/config.h>
#include <linux/proc_fs.h>
#include <linux/unistd.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/utsname.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/blk.h>
#include <linux/hdreg.h>

#include <asm/io.h>
#include <asm/bugs.h>

#ifdef CONFIG_PCI
#include <linux/pci.h>
#endif

#ifdef CONFIG_USB
#define __UUSBD__
#include <uusbd/usbd.h>
#endif

#ifdef CONFIG_DIO
#include <linux/dio.h>
#endif

#ifdef CONFIG_ZORRO
#include <linux/zorro.h>
#endif

#ifdef CONFIG_MTRR
#  include <asm/mtrr.h>
#endif

#ifdef CONFIG_APM
#include <linux/apm_bios.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 int kpiod(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 void sbus_init(void);
extern void powermac_init(void);
extern void sysctl_init(void);
extern void filescache_init(void);
extern void signals_init(void);

extern void device_setup(void);
extern void binfmt_setup(void);
extern void free_initmem(void);
extern void filesystem_setup(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);
extern void ioapic_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_JOY_AMIGA
extern void js_am_setup(char *str, int *ints);
#endif
#ifdef CONFIG_JOY_ANALOG
extern void js_an_setup(char *str, int *ints);
#endif
#ifdef CONFIG_JOY_ASSASIN
extern void js_as_setup(char *str, int *ints);
#endif
#ifdef CONFIG_JOY_CONSOLE
extern void js_console_setup(char *str, int *ints);
#endif
#ifdef CONFIG_JOY_DB9
extern void js_db9_setup(char *str, int *ints);
#endif
#ifdef CONFIG_JOY_TURBOGRAFX
extern void js_tg_setup(char *str, int *ints);
#endif
#ifdef CONFIG_JOY_LIGHTNING
extern void js_l4_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 sym53c8xx_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 sym53c416_setup(char *str, int *ints);
extern void wd7000_setup(char *str, int *ints);
extern void dc390_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_ADBMOUSE
extern void adb_mouse_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
#ifdef CONFIG_MDA_CONSOLE
extern void mdacon_setup(char *str, int *ints);
#endif
#ifdef CONFIG_LTPC
extern void ltpc_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

/*
 * 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 && (*cur=='-' || isdigit(*cur)) && i <= 10) {
		ints[i++] = simple_strtol(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 },
	{ "hdi",     0x3800 },
	{ "hdj",     0x3840 },
	{ "hdk",     0x3900 },
	{ "hdl",     0x3940 },
#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