Introduction to uboot

├── api Deposit uboot Provided API The interface function
├── arch We only need to care about the platform related parts under this directory ARM Folder
│ ├──arm
│ │ └──cpu
│ │ │ └──armv7
│ │ └──dts
│ │ │ └──*.dts Where the equipment is stored dts, That is, the pin information related to the device configuration
├── board The corresponding code of development boards for different platforms
├── cmd seeing the name of a thing one thinks of its function , Most of the command implementations are under this folder .
├── common Public code
├── configs The corresponding configuration files of each board are inside , our Lichee Configuration is also inside
├── disk Some operations on the disk are in this folder , For example, partition, etc .
├── doc Reference documents , There are many use documents related to the platform .
├── drivers All kinds of driver files are here
├── dts A tree structure （device tree） This should be uboot New syntax
├── examples Some official sample programs
├── fs file system ,uboot Some file systems that will be used
├── include The header file , All header files are under this folder
├── lib Some commonly used library files are under this folder
├── Licenses This actually has nothing to do with compilation , Just some license Statement of
├── net Network related , Need to use a small network protocol stack
├── post Power on self test program
├── scripts Compile scripts and Makefile file
├── spl second program loader, That is, it is equivalent to level II uboot start-up .
├── test Small unit test program .
└── tools There's a lot in it uboot Common tools .