MiniOS

This project aims to learn low-level OS mechanisms through the book Operating System in 1,000 Lines.

The goal is to build a simple OS for the 32-bit RISC-V platform.

Roadmap

• Boot a minimal kernel on QEMU
• Set up basic console input/output through SBI
• Understand the linker script and kernel memory layout
• Set up basic trap entry and register save/restore
• Implement simple single-core process creation and cooperative context switching
• Add a minimal physical page allocator
• Build page tables and switch address spaces with satp
• Load and run a user application in user mode
• Add basic syscalls: putchar, getchar, and exit
• Add basic virtio block device I/O
• Add a richer shell or more user applications
• Build a filesystem layer on top of block I/O