NYCU Operating System Capstone

This respository contains my implementation for the embeded kernel project in the Operating System Capstone course at NYCU.

Course Website

The kernel is divided into 7 labs and each lab implement the following functions:

• Lab1: Hello World
  • Kernel initialization
  • IO through Mini UART
  • A simple shell to interact with
• Lab2: Booting
  • A bootloader that loads kernel from the Mini UART
  • Parse ASCII Format Cpio Archive to load initramfs
• Lab 3: Exception and Interrupt
  • Handle exception and interrupt
    • Concurrent I/O Devices Handling
    • Nested Interrupt
    • Preemption: High priority interrupts should preempt the handler of the lower priority handlers.
• Lab 4: Allocator
  • Buddy System page allocator
  • Dynamic Memory Allocator for allocating memory less than a page
• Lab 5: Thread and User Process
  • Implement user process and context switch
  • System call interface
• Lab 6: Virtual Memory
  • Virtual memory in kernel space
  • Virtual memory in user space
  • Demand Paging
  • Copy-on-write
• Lab 7: Virtual File System
  • Virtual file system interface
  • Multitask VFS
  • Access initramfs with VFS
  • Access Mini UART IO with VFS