说明：  A pristine PetaLinux tree only includes pre-configured platform support for Xilinx FPGA based prototype development boards. The user needs to add their platform into PetaLinux before it can be used to build firmware for their target device. Customising PetaLinux essentially is adding the hardware and software components of an embedded system into the build framework. This chapter will discuss the procedures to add a new embedded system platform support into PetaLinux.