rvemu-for-book

Reference implementation of the book, Writing a RISC-V Emulator from Scratch in 10 Steps. The goal of this code and the book is runnning xv6 in our emulator.

This is based on original RISC-V emulator rvemu in Rust.

How to run xv6

$ cd step10 // move to the step10 directory
$ cargo run ./xv6-kernel.bin ./xv6-fs.img

Step to implement a RISC-V emulator

See https://book.rvemu.app/

• Step 1: Setup and Implement Two Instructions
• Step 2: RV64I Base Integer Instruction Set
• Step 3: Control and Status Registers
• Step 4: Privileged Instruction Set
• Step 5: Exceptions
• Step 6: UART (a universal asynchronous receiver-transmitter)
• Step 7: PLIC (a platform-level interrupt controller) and CLINT (a core-local interrupter)
• Step 8: Interrupts
• Step 9: Virtio
• Step 10: Virtual Memory System

Each step has a diff file generated by diff -x target -r step<previous> step<current> > diff_<previous>_<current>.