Introduction to Linux system and kernel initialization process

The full boot process is four steps

1:boot PROM Phase

2:boot Programs Phase

3:kernel initialization phase

4:init phase

System initialization, detecting memory and CPU, checking devices and creating device trees, setting console

Kernel initialization process

Kernel self-initialization kernel Self test

Loading of kernel modules load kernel module

Reading of the kernel configuration file in/etc/system Read kernel config file

Staring of the/sbin/init process running/sbin/init processes

BOOTBLK is the main bootstrapper for loading the second bootstrapper ufsboot

BOOTBLK is loaded by the boot sector of the boot device of the prom

The Ufsboot program is loaded with two parts of the core Genunix and Unix

Installboot is used to install BOOTBLK on a disk partition.

Genunix is the platform-independent generic kernel file, while UNIX is the platform-specific kernel.

The entire boot process:

PROM from the boot sector of the boot Device-->bookblk-->ufsboot-->genunix (normal kernel file for a standalone platform) and Unix (is a special platform kernel file )--> Other