Linux startup process

Source: Internet
Author: User

Looking at the end of the Linux kernel in-depth understanding of the introduction of the Linux startup process, let me understand the following to write it:

  • BIOS (Hardware power-on self-test post, looking for the first boot device)
  • The boot loader (can boot from the hard disk can also be from the floppy disk, this step to load the kernel into memory)
    • Booting from hard disk
  • Setup function (checks the hardware device and executes the set environment for the kernel thread)
  • Setup32 function (with two SETUP32 functions)
    • First SETUP32 (unzip the kernel screen to see the decompression complete, jump to the physical address 0x00100000 run the second SETUP32 function)
    • Second SETUP32 (Setting the execution environment for process 0)
  • Start_kernel function (initialization of the kernel, starting most of the kernel components, with process 1 running/sbin/init to start the appropriate startup program)

Linux startup process

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