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The editor today takes you to understand how to analyze the Linux system BSP. The knowledge points in the article are introduced in great detail. Friends who feel helpful can browse the content of the article with the editor, hoping to help more friends who want to solve this problem to find the answer to the problem. Follow the editor to learn more about "how to analyze Linux system BSP".

The tasks of UBOOT1 and uboot are system boot 2, uboot compilation output files, u-boot.bin u-boot.elf and other files, but the essence is the same file 3. Compilation is divided into two steps: one is configuration; the other is to compile instance configuration compilation commands are as follows: make ARCH= CROSS_COMPILE=_defconfig

Make CROSS_COMPILE=

LINUX1 and Linux are responsible for the final system running. 2. The compiled output files of linux are Image and * .dtb files. 3. Compilation is divided into two steps: one is configuration; the other is compiling make ARCH= CROSS_COMPILE=_defconfig.

Note: the used configuration above is the default configuration of linux. Sometimes some special configurations are required. At this time, you need to enter menuconfig to configure, as shown below: make ARCH= CROSS_COMPILE= menuconfig

Make ARCH= CROSS_COMPILE=

ROOTFS1 and rootfs are the file systems mounted by linux after the soc platform is up.

2. The directory structure of the rootfs root file system is roughly as follows:

/ bin * * executable commands, mainly user executable commands / sbin * * executable commands, as long as they are administrative commands

/ home * * the home directory of the user, one for each user

/ etc * configuration file

/ proc * pseudo file system

/ dev * * device file

/ root * * administrator's home directory, which cannot be partitioned separately

/ lib * library file / media * mount point directory, dominated by certain devices / mnt * mount point directory, dominated by additional 00:00 file system (such as USB devices)

/ opt * * optional directory, used to install third-party software / sys * * pseudo file system, mapping files for attributes related to hardware devices, and / tmp * temporary files cannot be distinguished separately.

/ usr * read only files

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