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