miniRVOS

miniRVOS

miniRVOS is a simple operating system implemented based on the course "Learn to Develop an Operating System on RISC-V".

Function

• Serial port input and output
• Physical memory management: memory allocation and recycling
• Multithreading support: Scheduling based on priority and time slices
• Interrupt support: external interrupts, soft interrupts, and time interrupts
• Task synchronization: spin lock
• Software timer
• Simple system calls

Environment and construction

environment

The running environment is Ubuntu 20.04 , and the detailed system version information is as follows:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.4 LTS
Release:        20.04
Codename:       focal

$ uname -r
5.10.16.3-microsoft-standard-WSL2

In Ubuntu 20.04 environment, please first run the following code to install the toolchain:

$ sudo apt update
$ sudo apt install build-essential gcc make perl dkms git gcc-riscv64-unknown-elf gdb-multiarch qemu-system-misc

Build

After completing the environment construction, enter the os directory and run make to build. The following are the build commands. For details, please refer to the Makefile file in the project:

• make : compile and build
• make run : start qemu and run
• make debug : Start GDB for debugging
• make code : disassemble to view binary code
• make clean : Clean the generated files

refer to

• https://gitee.com/unicornx/riscv-operating-system-mooc

• https://github.com/cccriscv/mini-riscv-os