UCAS-CA-Lab

This project implements an Operating System, for the UCAS course, Operating System Laboratory. This kernel is based on RISC-V64GC ISA

Supported Features

• Process and Thread Management, Task Scheduling
• Multicore CPU Support
• Inter-Process Communication (IPC): Mutex, Barriers, Semaphores, Message Boxes
• Virtual Memory Management: Paging, Demand paging, Swapping, Protection, provides isolation and protection between processes
• Networking (via E1000): Packet transmission, Reception, Basic protocol handling
• Filesystem with cache: Basic file operations, Cache policy manual configuration

Directory Structure

• bootloader/ - Contains a bootloader
• src/ - Contains the kernel
• test/ - Contains user level test programs
• tiny_libc/ - Contains basic runtime library for user programs
• tools/ - Contains a tool to pack elf files to a single image for run

Dependencies

• riscv-gnu-toolchain
• QEMU
• UBOOT modified by UCAS-OS-Lab course

Usage

Use make to build the kernel and user-programs. It will generate a image file under build directory.

make

Simulate in QEMU:

make run-smp #smp stands for multicore

Debug using QEMU:

make debug-smp # start QEMU in debug mode
# in another terminal
make gdb # start GDB and connect to QEMU

Run on board provided by the course:

make floppy # burn image to sdcard
# plugin sdcard into the board, then start the board and connect the board to main computer
make minicom # interact with the board