• Author: Richard James Howe
• Repo: https://github.com/howerj/riscv
• Email: mailto:howe.r.j.89@gmail.com
• License: 0BSD / Public Domain

THIS IS A WORK IN PROGRESS, IT CURRENTLY DOES NOT WORK.

The idea of this project is to create a very simple RISC-V simulator in a header file, it will be written in pure, portable C, with the peripherals being supplied by the user of the library (although a set of example peripherals will be provided).

The reason for implementing this is for a potential operating system project, where I would write a compiler for a Pascal/Oberon like language to make a Unix like system.

• Add docs / links to other implementations.
• Document things, for other people.
• Implement the various instruction sets standards
• Privilege, traps, system calls
• Implement MMU (s-mode)/Paging/...
• Make a set of simple peripherals, not necessarily realistic ones, RISC-V for:
  • Console / UART
  • Timers
  • Hard drive
  • Graphics, Audio
  • Mouse / Keyboard
  • Networking
• Port to rust
• Testing, test programs.
• Implement more realistic peripherals, preferably a set that exists in real hardware / can be emulated by QEMU for comparison.
• It might be nice to write a simple Forth for the platform to bring it up.
• Make it selectable whether 32-bit or 64-bit is used.
• Implement SBI spec / peripherals? Get Linux running on this?

• https://github.com/mnurzia/rv
• https://github.com/alexriegler12/riscv
• https://github.com/d0iasm/rvemu-for-book
• https://www.scs.stanford.edu/~zyedidia/docs/riscv/riscv-sbi.pdf
• https://riscv.org/specifications/ratified/