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-rw-r--r--init/init.c301
-rw-r--r--init/main.c648
2 files changed, 301 insertions, 648 deletions
diff --git a/init/init.c b/init/init.c
new file mode 100644
index 000000000..f52f7f57d
--- /dev/null
+++ b/init/init.c
@@ -0,0 +1,301 @@
+/*
+ * linux/init/init.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/ioport.h>
+#include <linux/kernel.h>
+
+extern unsigned long * prof_buffer;
+extern unsigned long prof_len;
+extern char edata, end;
+extern char *linux_banner;
+extern int parse_machine_options(char *line);
+extern int root_mountflags;
+extern int console_loglevel;
+
+extern struct {
+ char *str;
+ void (*setup_func)(char *, int *);
+} *bootsetups;
+
+/*
+ * Boot command-line arguments
+ */
+void copy_options(char * to, char * from);
+void parse_options(char *line);
+#define MAX_INIT_ARGS 8
+#define MAX_INIT_ENVS 8
+#define COMMAND_LINE ((char *) (PARAM+2048))
+#define COMMAND_LINE_SIZE 256
+
+extern unsigned long memory_start; /* After mem_init, stores the */
+ /* amount of free user memory */
+extern unsigned long memory_end;
+extern unsigned long low_memory_start;
+
+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 };
+
+/*
+ * 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];
+
+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 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;
+}
+
+/*
+ * 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.
+ */
+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 (parse_machine_options(line))
+ 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;
+}
+
+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 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);
+}
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);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 15:35:01 +0000