static int init(void * unused)
{
int pid,i;
#ifdef CONFIG_BLK_DEV_INITRD
int real_root_mountflags;
#endif
/* Launch bdflush from here, instead of the old syscall way. */
kernel_thread(bdflush, NULL, 0);
/* Start the background pageout daemon. */
kswapd_setup();
kernel_thread(kswapd, NULL, 0);
#ifdef CONFIG_BLK_DEV_INITRD
real_root_dev = ROOT_DEV;
real_root_mountflags = root_mountflags;
if (initrd_start && mount_initrd) root_mountflags &= ~MS_RDONLY;
else mount_initrd =0;
#endif
setup();
#ifdef __SMP__
/*
* With the devices probed and setup we can
* now enter SMP mode.
*/
smp_begin();
#endif
#ifdef CONFIG_UMSDOS_FS
{
/*
When mounting a umsdos fs as root, we detect
the pseudo_root (/linux) and initialise it here.
pseudo_root is defined in fs/umsdos/inode.c
*/
extern struct inode *pseudo_root;
if (pseudo_root != NULL){
current->fs->root = pseudo_root;
current->fs->pwd = pseudo_root;
}
}
#endif
#ifdef CONFIG_BLK_DEV_INITRD
root_mountflags = real_root_mountflags;
if (mount_initrd && ROOT_DEV != real_root_dev && ROOT_DEV == MKDEV(RAMDISK_MAJOR,0)) {
int error;
pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
if (pid>0)
while (pid != wait(&i));
if (real_root_dev != MKDEV(RAMDISK_MAJOR, 0)) {
error = change_root(real_root_dev,"/initrd");
if (error)
printk(KERN_ERR "Change root to /initrd: "
"error %d\n",error);
}
}
#endif
/*
* This keeps serial console MUCH cleaner, but does assume
* the console driver checks there really is a video device
* attached (Sparc effectively does).
*/
if ((open("/dev/tty1",O_RDWR,0) < 0) &&
(open("/dev/ttyS0",O_RDWR,0) < 0))
printk("Unable to open an initial console.\n");
(void) dup(0);
(void) dup(0);
if (!execute_command) {
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 */
pid = kernel_thread(do_rc, "/etc/rc", SIGCHLD);
if (pid>0)
while (pid != wait(&i))
/* nothing */;
}
while (1) {
pid = kernel_thread(do_shell,
execute_command ? execute_command : "/bin/sh",
SIGCHLD);
if (pid < 0) {
printf("Fork failed in init\n\r");
continue;
}
while (1)
if (pid == wait(&i))
break;
printf("\n\rchild %d died with code %04x\n\r",pid,i);
sync();
}
return -1;
}
/*
* Ok, the machine is now initialized. None of the devices
* have been touched yet, but the CPU subsystem is up and
* running, and memory and process management works.
*
* Now we can finally start doing some real work..
*/
static void __init do_basic_setup(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
int real_root_mountflags;
#endif
/*
* Tell the world that we're going to be the grim
* reaper of innocent orphaned children.
*
* We don't want people to have to make incorrect
* assumptions about where in the task array this
* can be found.
*/
child_reaper = current;
#if defined(CONFIG_MTRR) /* Do this after SMP initialization */
/*
* We should probably create some architecture-dependent "fixup after
* everything is up" style function where this would belong better
* than in init/main.c..
*/
mtrr_init();
#endif
#ifdef CONFIG_SYSCTL
sysctl_init();
#endif
/*
* Ok, at this point all CPU's should be initialized, so
* we can start looking into devices..
*/
#ifdef CONFIG_PCI
pci_init();
#endif
#ifdef CONFIG_SBUS
sbus_init();
#endif
#if defined(CONFIG_PPC)
powermac_init();
#endif
#ifdef CONFIG_MCA
mca_init();
#endif
#ifdef CONFIG_ARCH_ACORN
ecard_init();
#endif
#ifdef CONFIG_ZORRO
zorro_init();
#endif
#ifdef CONFIG_DIO
dio_init();
#endif
#ifdef CONFIG_TC
tc_init();
#endif
#ifdef CONFIG_PS2
ps2_dev_init(); /* PlayStation 2 devices */
#endif
/* Networking initialization needs a process context */
sock_init();
/* Launch bdflush from here, instead of the old syscall way. */
kernel_thread(bdflush, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
/* Start the background pageout daemon. */
kswapd_setup();
kernel_thread(kswapd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
#if CONFIG_AP1000
/* Start the async paging daemon. */
{
extern int asyncd(void *);
kernel_thread(asyncd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
}
#endif
#ifdef CONFIG_BLK_DEV_INITRD
real_root_dev = ROOT_DEV;
real_root_mountflags = root_mountflags;
if (initrd_start && mount_initrd) root_mountflags &= ~MS_RDONLY;
else mount_initrd =0;
#endif
/* Set up devices .. */
device_setup();
/* .. executable formats .. */
binfmt_setup();
/* .. filesystems .. */
filesystem_setup();
/* Mount the root filesystem.. */
mount_root();
#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->i_sb->s_root;
current->fs->pwd = pseudo_root->i_sb->s_root;
}
}
#endif
#ifdef CONFIG_BLK_DEV_INITRD
root_mountflags = real_root_mountflags;
if (mount_initrd && ROOT_DEV != real_root_dev
&& MAJOR(ROOT_DEV) == RAMDISK_MAJOR && MINOR(ROOT_DEV) == 0) {
int error;
int i, pid;
pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
if (pid>0)
while (pid != wait(&i));
if (MAJOR(real_root_dev) != RAMDISK_MAJOR
|| MINOR(real_root_dev) != 0) {
error = change_root(real_root_dev,"/initrd");
if (error)
printk(KERN_ERR "Change root to /initrd: "
"error %d\n",error);
}
}
#endif
}
