Porting and FPGA Implementation of LXDE Desktop Environment Based on RISC-V

Abstract

As a new generation of open and reduced instruction set architecture, RISC-V has the characteristics of concise instruction set, modularity and scalability, and has been quickly and widely used due to its advantages of agile development mode and complete tool chains, but there are few desktop systems based on RISC-V at present. Based on the open source RISC-V BOOM core, this paper constructs a desktop system which can start the LXDE graphical interface on Xilinx VU440 FPGA. Specifically, we implement a variety of peripheral modules such as bus conversion and VGA on the boom core, and port the open source bootloader, Linux 4.15 kernel and LXDE desktop environment. Under the desktop system, standard test sets, such as CoreMark can be run normally, and the test results show that the performance of the system is at a high level. By extending peripherals, this RISC-V prototype system can be used to realize SoC in many special areas.