MSIM

MSIM is a light-weight computer simulator based on MIPS R4000 and RISC-V. It is used for education and research purposes, mainly to teach the construction and implementation of operating systems. Following features are available:

• MIPS R4000 CPU

  • full memory management (TLB)

  • multiprocessor support

  • the instruction set is restricted to 32 bits

  • CPU cache is not simulated

• RISC-V RV32IMA CPU

  • A extension

  • M extension

  • Supervisor and User modes

  • multiprocessor support

  • cache is not simulated

  • Sv32 virtual address translation with TLB simulation

• simple debugging features (including disassembling, register content dump)

• several simple hardware devices

• various hardware-manipulating commands

• widely configurable memory mapping of devices

• script-like start-up configuration file

MSIM is distributed with source code under the GNU GPL license to make possible modifications for users and works on most POSIX-compliance environments (mainly GNU/Linux, Mac OS X, but can be also compiled in Cygwin or MinGW in Windows). See installation instructions.

Table of Contents

• Tutorial
  • Installing
  • Devices
• Reference documentation
  • Introduction
  • Deployment
  • Command line parameters
  • System environment
  • Configuration file
  • Internal variables
  • Input command line
  • System commands
  • Devices
  • Special instructions
  • RISC-V pre-defined constants
  • Special RISC-V CSR
  • RISC-V TLB
  • GDB support
• Developement manual
  • Structure