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PyMTL 3 (Mamba): Python-based hardware generation, simulation, and verification framework

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PyMTL 3 (Mamba)

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PyMTL 3 (Mamba) is the latest version of PyMTL, an open-source Python-based hardware generation, simulation, and verification framework with multi-level hardware modeling support. The original PyMTL was introduced at MICRO-47 in December, 2014. Please note that PyMTL 3 is currently beta software that is under active development and documentation is currently quite sparse.

In June 2019, Keeping Computer Hardware Fast and Furious: "PyMTL is a fantastic example of what we need to jump-start the open-source hardware ecosystem…It’s a key missing link." was featured on Cornell Research.

Tutorials

We recently hold a very high quality PyMTL 3 tutorial at FCRC 2019 with 40+ researchers attended. The code for tutorial is here https://github.com/cornell-brg/pymtl-tutorial-isca2019. The website with all slides and link to VM is here https://www.csl.cornell.edu/pymtl2019/. This 32-bit CentOS 7 virtualbox image includes pymtl3 and all the open-source EDA toolchains required to complete the tutorial. Note that this tutorial is based on an older alpha release of PyMTL 3 that only works on Python 2.7. We are working on better documentations and tutorials.

Related publications

  • Shunning Jiang, Christopher Torng, and Christopher Batten. "An Open-Source Python-Based Hardware Generation, Simulation, and Verification Framework." First Workshop on Open-Source EDA Technology (WOSET'18) held in conjunction with ICCAD-37, Nov. 2018.

  • Shunning Jiang, Berkin Ilbeyi, and Christopher Batten. "Mamba: Closing the Performance Gap in Productive Hardware Development Frameworks." 55th ACM/IEEE Design Automation Conf. (DAC-55), June 2018.

  • Derek Lockhart, Gary Zibrat, and Christopher Batten. "PyMTL: A Unified Framework for Vertically Integrated Computer Architecture Research." 47th ACM/IEEE Int'l Symp. on Microarchitecture (MICRO-47), Dec. 2014.

License

PyMTL is offered under the terms of the Open Source Initiative BSD 3-Clause License. More information about this license can be found here:

Installation

The steps for installing these prerequisites and PyMTL on a fresh Ubuntu distribution are shown below. They have been tested with Ubuntu Xenial 18.04.

Install PyMTL 3

PyMTL 3 is available on pypi.org. As a result, you are able to just call pip install pymtl3 to install PyMTL 3.

PyMTL 3 requires Python 3.6+. We highly recommend you work inside a virtual environment instead of calling sudo pip install. Starting from Python 3.5, the use of venv is now recommended for creating virtual environments.

 $ cd <path to where venvs are stored>
 $ python3 -m venv pymtl3 # you can use whatever Python 3.6+ binary you have
 $ source pymtl3/bin/activate

 $ pip install pymtl3

When you relaunch the bash session, you need to re-enable the venv.

 $ source <path to where venvs are stored>/pymtl3/bin/activate

When you're done testing/developing but you don't want to close the terminal, you can deactivate the virtualenv:

 $ deactivate

Additional dependencies include verilator(and pkg-config) when you want to integrate SystemVerilog blackbox into your PyMTL simulation.

Install Verilator

Verilator is an open-source toolchain for compiling SystemVerilog RTL models into C++ simulators. You can install Verilator using the standard package manager but the version available in the package repositories is several years old. This means you will need to build and install Verilator from source using the following commands:

 $ sudo apt-get install git make autoconf g++ libfl-dev bison
 $ mkdir -p ${HOME}/src
 $ cd ${HOME}/src
 $ wget http://www.veripool.org/ftp/verilator-4.008.tgz
 $ tar -xzvf verilator-4.008.tgz
 $ cd verilator-4.008
 $ ./configure
 $ make
 $ sudo make install

Verify that Verilator is on your path as follows:

 $ cd $HOME
 $ which verilator
 $ verilator --version

PyMTL uses pkg-config to find the Verilator source files when integrating SystemVerilog blackbox. Install pkg-config and verify that it is setup correctly as follows:

 $ sudo apt-get install pkg-config
 $ pkg-config --print-variables verilator

If pkg-config cannot find information about verilator, then you can also explicitly set the following special environment variable:

 $ export PYMTL_VERILATOR_INCLUDE_DIR="/usr/local/share/verilator/include"

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