Brief introduction of embedded Linux boot process

First power on after the chip will be cured at an address to find the first startup program, complete the initialization work, and then jump to a predetermined address to execute a bare-metal program or Uboot program, in Uboot according to set the kernel boot parameters to boot the kernel, tell the kernel how to load, how to initialize, And the first program, the location of the root file system. Then the kernel starts up, mounts the root filesystem, executes the first program init, and then Init launches other programs, mounts the corresponding file system, and the INIT program acts as a daemon, guarding the process it initiates, So that it does not quit or restart in a timely manner. The program starts and the file system mounts and Linux is ready to use.

Brief introduction of embedded Linux boot process