ercesiMIPS Processor Porject

Author: Danghui Wang (wangdh@nwpu.edu.cn)

Date: 2017 April 9

Diagrams: ercesiMIPS wiki. If you have any questions, share it with us in our community chat room.

This repo has been put together to demonstrate a number of simple MIPS Processors written in Chisel.

Install Chisel (according to usb-bar chisel3)

Install sbt Run the following from the terminal to install sbt in (Ubuntu-like) Linux.

echo "deb https://dl.bintray.com/sbt/debian /" | sudo tee -a /etc/apt/sources.list.d/sbt.list
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2EE0EA64E40A89B84B2DF73499E82A75642AC823
sudo apt-get update
sudo apt-get install sbt

Install updated Verilator. Install dependencies:

sudo apt-get install git make autoconf g++ flex bison

Clone the Verilator repository：

git clone http://git.veripool.org/git/verilator

In the Verilator repository directory, check out a known good version (You can skip the step if the latest version is statable.):

cd verilator
git pull
git checkout verilator_3_886

In Verilator directory, build and install:

cd verilator
unset VERILATOR_ROOT
autoconf
./configure
make
sudo make install

Clone lab repository

Run the following from the terminal to clone lab resources.

cd ~/
git clone https://github.com/zavs/ercesiMIPS.git

Write your CPU and test it

A template ALU block has been presented in src/main/scala/SingleCycle/ALU.scala with the tester in src/test/scala/SingleCycle/ALUtests.scala. We borrowed the Launcher method from ucb-bar/chisel-tutorial. A new argument for shell runner needs to be name in Launcher.scala as the arguments of Map function:

object Launcher {
  val tests = Map(
        "ALU" -> { (backendName: String) =>
              Driver(() => new ALU(), backendName) {
                (c) => new ALUTests(c)
              }
            },
        "ALU11" -> { (backendName: String) =>
              Driver(() => new ALU11(), backendName) {
                (c) => new ALU11Tests(c)
              }
            }
        }
    )
}

In which, "ALU" is the argument for the shell runner, and ALU() is denoted the instance class of DUT in ALUTests(c). Just add new argument for you own block class.

To test the ALU module with ALUtests, just input the following command in ercesiMIPS root directory.

./run-single.sh ALU

If you still want to monitor its verification via waveform, just run this:

./run-single.bak.v.sh ALU

And the output .vcd file can be monitored in gtkwave program which could be install in Ubuntu-like Linux:

sudo apt-get install gtkwave

To test multicycle CPU with TopTests, just input the following command in ercesiMIPS root directory.

./run-multi.sh Top

If you still want to monitor multicycle's waveform, just run this:

./run-multi.bak.v.sh Top