RISC-V-emulator

A small exercise to learn the RISC-V instruction set. The end goal is to boot an MMU-less version of the Linux Kernel.

I'm writing it in Python to explore the "problem space" i.e. understand the RISC-V platform. After I finish the project in Python, I will use it to learn Rust by rewriting this project in Rust. So in the end there will be two versions of the emulator - one written in Python and the other in Rust

I'm also writing a blog post about each implemented instruction, and will put links here when the blog is ready.

Current status

The emulator successfully loads the kernel image and device tree binary, and boots Linux up to the shell prompt. It emulates rv32ima instruction set and executes 63 million RISC-V instructions to reach the shell prompt.

Since the input is not implemented, the emulator stops after the shell prompt gets outputted.

The emulator can also print which kernel function the CPU is currently executing by comparing the current PC with entries in a .map file

Running the emulator

cd RISC-V-emulator/python/

python3 main.py

Screenshot