Embedded Linux System Structure

Embedded Linux File System

A typical embedded Linux system usually includes the boot zone, kernel zone, and file system Zone according to the storage space. The boot area stores Bootloader and kernel parameters. The kernel area stores customized linux kernels for specific embedded platforms. The file system area includes the root file system and the file system built on the flash kernel device. The graphic interface system and user applications are stored in the file system area.

The space occupied by bootloader is generally small, followed by the startup parameter area, which is used to save the Linux kernel startup parameters and user startup configurations. The bootloader program is the boot loader of an embedded system. It is the first software code to run after the system is powered on. The bootloader program is hardware-related. In an ARM-based embedded system, the system usually runs at 0x00000000 during power-on or reset. Therefore, the bootloader program is generally installed at this address. The main task of the bootloader program is to initialize the hardware device and create a map of the memory space, so as to bring the system's hardware and software environment to a suitable state. The main task of bootloader is to start the Linux kernel.