Import of Linux/MIPS 1.1.68

1 files changed, 0 insertions, 648 deletions

diff --git a/init/main.c b/init/main.c
deleted file mode 100644
index ceaabb60f..000000000
--- a/init/main.c
+++ /dev/null
@@ -1,648 +0,0 @@
-/*
- *  linux/init/main.c
- *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- */
-
-#include <stdarg.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/config.h>
-#include <linux/sched.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/ctype.h>
-#include <linux/delay.h>
-#include <linux/utsname.h>
-#include <linux/ioport.h>
-
-extern unsigned long * prof_buffer;
-extern unsigned long prof_len;
-extern char edata, end;
-extern char *linux_banner;
-asmlinkage void lcall7(void);
-struct desc_struct default_ldt;
-
-/*
- * we need this inline - forking from kernel space will result
- * in NO COPY ON WRITE (!!!), until an execve is executed. This
- * is no problem, but for the stack. This is handled by not letting
- * main() use the stack at all after fork(). Thus, no function
- * calls - which means inline code for fork too, as otherwise we
- * would use the stack upon exit from 'fork()'.
- *
- * Actually only pause and fork are needed inline, so that there
- * won't be any messing with the stack from main(), but we define
- * some others too.
- */
-#define __NR__exit __NR_exit
-static inline _syscall0(int,idle)
-static inline _syscall0(int,fork)
-static inline _syscall0(int,pause)
-static inline _syscall0(int,setup)
-static inline _syscall0(int,sync)
-static inline _syscall0(pid_t,setsid)
-static inline _syscall3(int,write,int,fd,const char *,buf,off_t,count)
-static inline _syscall1(int,dup,int,fd)
-static inline _syscall3(int,execve,const char *,file,char **,argv,char **,envp)
-static inline _syscall3(int,open,const char *,file,int,flag,int,mode)
-static inline _syscall1(int,close,int,fd)
-static inline _syscall1(int,_exit,int,exitcode)
-static inline _syscall3(pid_t,waitpid,pid_t,pid,int *,wait_stat,int,options)
-
-static inline pid_t wait(int * wait_stat)
-{
-	return waitpid(-1,wait_stat,0);
-}
-
-static char printbuf[1024];
-
-extern int console_loglevel;
-
-extern char empty_zero_page[PAGE_SIZE];
-extern void init(void);
-extern void init_IRQ(void);
-extern void init_modules(void);
-extern long console_init(long, long);
-extern long kmalloc_init(long,long);
-extern long blk_dev_init(long,long);
-extern long chr_dev_init(long,long);
-extern void sock_init(void);
-extern long rd_init(long mem_start, int length);
-unsigned long net_dev_init(unsigned long, unsigned long);
-extern long bios32_init(long, long);
-
-extern void hd_setup(char *str, int *ints);
-extern void bmouse_setup(char *str, int *ints);
-extern void eth_setup(char *str, int *ints);
-extern void xd_setup(char *str, int *ints);
-extern void mcd_setup(char *str, int *ints);
-extern void st_setup(char *str, int *ints);
-extern void st0x_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 aha152x_setup(char *str, int *ints);
-extern void aha1542_setup(char *str, int *ints);
-extern void aha274x_setup(char *str, int *ints);
-extern void scsi_luns_setup(char *str, int *ints);
-extern void sound_setup(char *str, int *ints);
-#ifdef CONFIG_SBPCD
-extern void sbpcd_setup(char *str, int *ints);
-#endif CONFIG_SBPCD
-#ifdef CONFIG_CDU31A
-extern void cdu31a_setup(char *str, int *ints);
-#endif CONFIG_CDU31A
-void ramdisk_setup(char *str, int *ints);
-
-#ifdef CONFIG_SYSVIPC
-extern void ipc_init(void);
-#endif
-#ifdef CONFIG_SCSI
-extern unsigned long scsi_dev_init(unsigned long, unsigned long);
-#endif
-
-/*
- * This is set up by the setup-routine at boot-time
- */
-#define PARAM	empty_zero_page
-#define EXT_MEM_K (*(unsigned short *) (PARAM+2))
-#define DRIVE_INFO (*(struct drive_info_struct *) (PARAM+0x80))
-#define SCREEN_INFO (*(struct screen_info *) (PARAM+0))
-#define MOUNT_ROOT_RDONLY (*(unsigned short *) (PARAM+0x1F2))
-#define RAMDISK_SIZE (*(unsigned short *) (PARAM+0x1F8))
-#define ORIG_ROOT_DEV (*(unsigned short *) (PARAM+0x1FC))
-#define AUX_DEVICE_INFO (*(unsigned char *) (PARAM+0x1FF))
-
-/*
- * Boot command-line arguments
- */
-#define MAX_INIT_ARGS 8
-#define MAX_INIT_ENVS 8
-#define COMMAND_LINE ((char *) (PARAM+2048))
-#define COMMAND_LINE_SIZE 256
-
-extern void time_init(void);
-
-static unsigned long memory_start = 0;	/* After mem_init, stores the */
-					/* amount of free user memory */
-static unsigned long memory_end = 0;
-static unsigned long low_memory_start = 0;
-
-static char term[21];
-int rows, cols;
-
-static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
-static char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", term, NULL, };
-
-static char * argv_rc[] = { "/bin/sh", NULL };
-static char * envp_rc[] = { "HOME=/", term, NULL };
-
-static char * argv[] = { "-/bin/sh",NULL };
-static char * envp[] = { "HOME=/usr/root", term, NULL };
-
-struct drive_info_struct { char dummy[32]; } drive_info;
-struct screen_info screen_info;
-
-unsigned char aux_device_present;
-int ramdisk_size;
-int root_mountflags = 0;
-
-static char fpu_error = 0;
-
-static char command_line[COMMAND_LINE_SIZE] = { 0, };
-
-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);
-}
-
-struct {
-	char *str;
-	void (*setup_func)(char *, int *);
-} bootsetups[] = {
-	{ "reserve=", reserve_setup },
-	{ "ramdisk=", ramdisk_setup },
-#ifdef CONFIG_INET
-	{ "ether=", eth_setup },
-#endif
-#ifdef CONFIG_SCSI
-	{ "max_scsi_luns=", scsi_luns_setup },
-#endif
-#ifdef 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_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 },
-#endif
-#ifdef CONFIG_SCSI_AHA152X
-        { "aha152x=", aha152x_setup},
-#endif
-#ifdef CONFIG_SCSI_AHA1542
-        { "aha1542=", aha1542_setup},
-#endif
-#ifdef CONFIG_SCSI_AHA274X
-        { "aha274x=", aha274x_setup},
-#endif
-#ifdef CONFIG_BLK_DEV_XD
-	{ "xd=", xd_setup },
-#endif
-#ifdef CONFIG_MCD
-	{ "mcd=", mcd_setup },
-#endif
-#ifdef CONFIG_SOUND
-	{ "sound=", sound_setup },
-#endif
-#ifdef CONFIG_SBPCD
-	{ "sbpcd=", sbpcd_setup },
-#endif CONFIG_SBPCD
-#ifdef CONFIG_CDU31A
-	{ "cdu31a=", cdu31a_setup },
-#endif CONFIG_CDU31A
-	{ 0, 0 }
-};
-
-void ramdisk_setup(char *str, int *ints)
-{
-   if (ints[0] > 0 && ints[1] >= 0)
-      ramdisk_size = ints[1];
-}
-
-static int checksetup(char *line)
-{
-	int i = 0;
-	int ints[11];
-
-	while (bootsetups[i].str) {
-		int n = strlen(bootsetups[i].str);
-		if (!strncmp(line,bootsetups[i].str,n)) {
-			bootsetups[i].setup_func(get_options(line+n,ints), ints);
-			return 1;
-		}
-		i++;
-	}
-	return 0;
-}
-
-unsigned long loops_per_sec = 1;
-
-static void calibrate_delay(void)
-{
-	int ticks;
-
-	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 >= HZ) {
-			__asm__("mull %1 ; divl %2"
-				:"=a" (loops_per_sec)
-				:"d" (HZ),
-				 "r" (ticks),
-				 "0" (loops_per_sec)
-				:"dx");
-			printk("ok - %lu.%02lu BogoMips\n",
-				loops_per_sec/500000,
-				(loops_per_sec/5000) % 100);
-			return;
-		}
-	}
-	printk("failed\n");
-}
-
-
-/*
- * 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 - currently
- * only the "root=XXXX" option is recognized. These options are not given
- * to init - they are for internal kernel use only.
- */
-static void parse_options(char *line)
-{
-	char *next;
-	char *devnames[] = { "hda", "hdb", "sda", "sdb", "sdc", "sdd", "sde", "fd", "xda", "xdb", NULL };
-	int devnums[]    = { 0x300, 0x340, 0x800, 0x810, 0x820, 0x830, 0x840, 0x200, 0xD00, 0xD40, 0};
-	int args, envs;
-
-	if (!*line)
-		return;
-	args = 0;
-	envs = 1;	/* TERM is set to 'console' by default */
-	next = line;
-	while ((line = next) != NULL) {
-		if ((next = strchr(line,' ')) != NULL)
-			*next++ = 0;
-		/*
-		 * check for kernel options first..
-		 */
-		if (!strncmp(line,"root=",5)) {
-			int n;
-			line += 5;
-			if (strncmp(line,"/dev/",5)) {
-				ROOT_DEV = simple_strtoul(line,NULL,16);
-				continue;
-			}
-			line += 5;
-			for (n = 0 ; devnames[n] ; n++) {
-				int len = strlen(devnames[n]);
-				if (!strncmp(line,devnames[n],len)) {
-					ROOT_DEV = devnums[n]+simple_strtoul(line+len,NULL,0);
-					break;
-				}
-			}
-			continue;
-		}
-		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 (!strcmp(line,"no-hlt")) {
-			hlt_works_ok = 0;
-			continue;
-		}
-		if (!strcmp(line,"no387")) {
-			hard_math = 0;
-			__asm__("movl %%cr0,%%eax\n\t"
-				"orl $0xE,%%eax\n\t"
-				"movl %%eax,%%cr0\n\t" : : : "ax");
-			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;
-}
-
-static void copy_options(char * to, char * from)
-{
-	char c = ' ';
-	int len = 0;
-
-	for (;;) {
-		if (c == ' ' && *(unsigned long *)from == *(unsigned long *)"mem=")
-			memory_end = simple_strtoul(from+4, &from, 0);
-		c = *(from++);
-		if (!c)
-			break;
-		if (COMMAND_LINE_SIZE <= ++len)
-			break;
-		*(to++) = c;
-	}
-	*to = '\0';
-}
-
-static void copro_timeout(void)
-{
-	fpu_error = 1;
-	timer_table[COPRO_TIMER].expires = jiffies+100;
-	timer_active |= 1<<COPRO_TIMER;
-	printk("387 failed: trying to reset\n");
-	send_sig(SIGFPE, last_task_used_math, 1);
-	outb_p(0,0xf1);
-	outb_p(0,0xf0);
-}
-
-static void check_fpu(void)
-{
-	static double x = 4195835.0;
-	static double y = 3145727.0;
-	unsigned short control_word;
-	int i;
-
-	if (!hard_math) {
-#ifndef CONFIG_MATH_EMULATION
-		printk("No coprocessor found and no math emulation present.\n");
-		printk("Giving up.\n");
-		for (;;) ;
-#endif
-		return;
-	}
-	/*
-	 * check if exception 16 works correctly.. This is truly evil
-	 * code: it disables the high 8 interrupts to make sure that
-	 * the irq13 doesn't happen. But as this will lead to a lockup
-	 * if no exception16 arrives, it depends on the fact that the
-	 * high 8 interrupts will be re-enabled by the next timer tick.
-	 * So the irq13 will happen eventually, but the exception 16
-	 * should get there first..
-	 */
-	printk("Checking 386/387 coupling... ");
-	timer_table[COPRO_TIMER].expires = jiffies+50;
-	timer_table[COPRO_TIMER].fn = copro_timeout;
-	timer_active |= 1<<COPRO_TIMER;
-	__asm__("clts ; fninit ; fnstcw %0 ; fwait":"=m" (*&control_word));
-	control_word &= 0xffc0;
-	__asm__("fldcw %0 ; fwait": :"m" (*&control_word));
-	outb_p(inb_p(0x21) | (1 << 2), 0x21);
-	__asm__("fldz ; fld1 ; fdiv %st,%st(1) ; fwait");
-	timer_active &= ~(1<<COPRO_TIMER);
-	if (fpu_error)
-		return;
-	if (!ignore_irq13) {
-		printk("Ok, fpu using old IRQ13 error reporting\n");
-		return;
-	}
-	__asm__("fninit\n\t"
-		"fldl %1\n\t"
-		"fdivl %2\n\t"
-		"fmull %2\n\t"
-		"fldl %1\n\t"
-		"fsubp %%st,%%st(1)\n\t"
-		"fistpl %0\n\t"
-		"fwait\n\t"
-		"fninit"
-		: "=m" (*&i)
-		: "m" (*&x), "m" (*&y));
-	if (!i) {
-		printk("Ok, fpu using exception 16 error reporting.\n");
-		return;
-
-	}
-	printk("Ok, FDIV bug i%c86 system\n", '0'+x86);
-}
-
-static void check_hlt(void)
-{
-	printk("Checking 'hlt' instruction... ");
-	if (!hlt_works_ok) {
-		printk("disabled\n");
-		return;
-	}
-	__asm__ __volatile__("hlt ; hlt ; hlt ; hlt");
-	printk("Ok.\n");
-}
-
-static void check_bugs(void)
-{
-	check_fpu();
-	check_hlt();
-}
-
-asmlinkage void start_kernel(void)
-{
-/*
- * Interrupts are still disabled. Do necessary setups, then
- * enable them
- */
-	set_call_gate(&default_ldt,lcall7);
- 	ROOT_DEV = ORIG_ROOT_DEV;
- 	drive_info = DRIVE_INFO;
- 	screen_info = SCREEN_INFO;
-	aux_device_present = AUX_DEVICE_INFO;
-	memory_end = (1<<20) + (EXT_MEM_K<<10);
-	memory_end &= PAGE_MASK;
-	ramdisk_size = RAMDISK_SIZE;
-	copy_options(command_line,COMMAND_LINE);
-#ifdef CONFIG_MAX_16M
-	if (memory_end > 16*1024*1024)
-		memory_end = 16*1024*1024;
-#endif
-	if (MOUNT_ROOT_RDONLY)
-		root_mountflags |= MS_RDONLY;
-	if ((unsigned long)&end >= (1024*1024)) {
-		memory_start = (unsigned long) &end;
-		low_memory_start = PAGE_SIZE;
-	} else {
-		memory_start = 1024*1024;
-		low_memory_start = (unsigned long) &end;
-	}
-	low_memory_start = PAGE_ALIGN(low_memory_start);
-	memory_start = paging_init(memory_start,memory_end);
-	if (strncmp((char*)0x0FFFD9, "EISA", 4) == 0)
-		EISA_bus = 1;
-	trap_init();
-	init_IRQ();
-	sched_init();
-	parse_options(command_line);
-	init_modules();
-#ifdef CONFIG_PROFILE
-	prof_buffer = (unsigned long *) memory_start;
-	prof_len = (unsigned long) &end;
-	prof_len >>= 2;
-	memory_start += prof_len * sizeof(unsigned long);
-#endif
-	memory_start = console_init(memory_start,memory_end);
-	memory_start = bios32_init(memory_start,memory_end);
-	memory_start = kmalloc_init(memory_start,memory_end);
-	memory_start = chr_dev_init(memory_start,memory_end);
-	memory_start = blk_dev_init(memory_start,memory_end);
-	sti();
-	calibrate_delay();
-#ifdef CONFIG_SCSI
-	memory_start = scsi_dev_init(memory_start,memory_end);
-#endif
-#ifdef CONFIG_INET
-	memory_start = net_dev_init(memory_start,memory_end);
-#endif
-	memory_start = inode_init(memory_start,memory_end);
-	memory_start = file_table_init(memory_start,memory_end);
-	memory_start = name_cache_init(memory_start,memory_end);
-	mem_init(low_memory_start,memory_start,memory_end);
-	buffer_init();
-	time_init();
-	sock_init();
-#ifdef CONFIG_SYSVIPC
-	ipc_init();
-#endif
-	sti();
-	check_bugs();
-
-	system_utsname.machine[1] = '0' + x86;
-	printk(linux_banner);
-
-	move_to_user_mode();
-	if (!fork())		/* we count on this going ok */
-		init();
-/*
- * 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 a infinite idle loop.
- */
-	for(;;)
-		idle();
-}
-
-static int printf(const char *fmt, ...)
-{
-	va_list args;
-	int i;
-
-	va_start(args, fmt);
-	write(1,printbuf,i=vsprintf(printbuf, fmt, args));
-	va_end(args);
-	return i;
-}
-
-void init(void)
-{
-	int pid,i;
-
-	setup();
-	sprintf(term, "TERM=con%dx%d", ORIG_VIDEO_COLS, ORIG_VIDEO_LINES);
-
-	#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
-
-	(void) open("/dev/tty1",O_RDWR,0);
-	(void) dup(0);
-	(void) dup(0);
-
-	execve("/etc/init",argv_init,envp_init);
-	execve("/bin/init",argv_init,envp_init);
-	execve("/sbin/init",argv_init,envp_init);
-	/* if this fails, fall through to original stuff */
-
-	if (!(pid=fork())) {
-		close(0);
-		if (open("/etc/rc",O_RDONLY,0))
-			_exit(1);
-		execve("/bin/sh",argv_rc,envp_rc);
-		_exit(2);
-	}
-	if (pid>0)
-		while (pid != wait(&i))
-			/* nothing */;
-	while (1) {
-		if ((pid = fork()) < 0) {
-			printf("Fork failed in init\n\r");
-			continue;
-		}
-		if (!pid) {
-			close(0);close(1);close(2);
-			setsid();
-			(void) open("/dev/tty1",O_RDWR,0);
-			(void) dup(0);
-			(void) dup(0);
-			_exit(execve("/bin/sh",argv,envp));
-		}
-		while (1)
-			if (pid == wait(&i))
-				break;
-		printf("\n\rchild %d died with code %04x\n\r",pid,i);
-		sync();
-	}
-	_exit(0);
-}