Riscv-Emulator

IMPORTANT

This repository is NOT A SELF-RUNNING repository. The right way to open it is use ysyx-framework

Introduction

NEMU is a simple but complete full-system emulator designed for teaching purpose. Currently it supports x86, mips32, riscv32 and riscv64. To build programs run above NEMU, refer to the AM project.

The main features of NEMU include

• a small monitor with a simple debugger
  • single step
  • register/memory examination
  • expression evaluation without the support of symbols
  • watch point
  • differential testing with reference design (e.g. QEMU)
  • snapshot
• CPU core with support of most common used instructions
  • x86
    • real mode is not supported
    • x87 floating point instructions are not supported
  • mips32
    • CP1 floating point instructions are not supported
  • riscv32
    • only RV32IM
  • riscv64
    • only RV64IM
• memory
• paging
  • TLB is optional (but necessary for mips32)
  • protection is not supported
• interrupt and exception
  • protection is not supported
• 5 devices
  • serial, timer, keyboard, VGA, audio
  • most of them are simplified and unprogrammable
• 2 types of I/O
  • port-mapped I/O and memory-mapped I/O

TODO List

pls see ysyx-framework