SOFA

Introduction

SOFA (Skywater Opensource FPGAs) are a series of open-source FPGA IPs using the open-source Skywater 130nm PDK and OpenFPGA framework.

This repository provide the following support for the eFPGA IPs

• Architecture description file : Users can inspect architecture details and try architecture evalution using the VTR project and the OpenFPGA project.
• Fabrication-ready GDSII layouts: Users can integrate to their chip designs.
• Post-layout Verilog Netlists: Users can run HDL simulations on the eFPGA IPs to validate their applications
• Benchmark suites: An example benchmarking suite with which users can run quick examples on the eFPGA IPs
• Documentation: Datasheets for each eFPGA IPs downto circuit-level details

Quick Start

To run the user flow using SOFA repository you need to have OpenFPGA installed. Please visit https://github.com/lnis-uofu/OpenFPGA#compilation for OpenFPGA installaton.

export OPENFPGA_PATH=<path_to_openfpga_root>

# Clone the SOFA repository
git clone https://github.com/lnis-uofu/SOFA.git

# ======== Goto specific design ========
# FPGA1212_SOFA_CHD_PNR
# FPGA1212_QLSOFA_HD_PNR
# FPGA1212_SOFA_HD_PNR
cd FPGA1212_QLSOFA_HD_PNR

# ======== Run example OpenFPGA Task ========
make runOpenFPGA

# ======== To view the results ========
cat FPGA1212_QLSOFA_HD_task/latest/task_result.csv

# ======== To view detailed log ========
cat codeopen FPGA1212_QLSOFA_HD_task/latest/vpr_arch/top/MIN_ROUTE_CHAN_WIDTH/**/openfpgashell.log

To bechmark your own design

Copy your verilog file FPGA1212_QLSOFA_HD_task/micro_benchmark directory and modify FPGA1212_QLSOFA_HD_task/config/task_simulation.conf file.

Details of different paramters can be found Configure run_fpga_task

cd FPGA1212_QLSOFA_HD_PNR
vi FPGA1212_QLSOFA_HD_task/config/task_simulation.conf

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Chip Gallery

You can find a chip gallery in the online documentation

Directory Organization

• Keep this folder clean and organized as follows
  • DOC: documentation of the project
  • ARCH: Architecture XML and other input files which OpenFPGA requires to generate Verilog netlists
  • BENCHMARK: Benchmarks to be tested on the FPGA fabric
  • HDL: Hardware description netlists for the FPGA fabrics
  • SDC: design constraints
  • SCRIPT: Scripts to setup, run OpenFPGA etc.
  • TESTBENCH: Verilog testbenches generated by OpenFPGA
  • PDK: Technology files linked from skywater opensource pdk
  • SNPS_ICC2: workspace of Synopsys IC Compiler 2 Keep a README inside the folder about the ICC2 version and how-to-use.
  • MSIM: workspace of verification using Mentor ModelSim

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• Note:
  • Please ONLY place folders under this directory. README should be the ONLY file under this directory
  • Each EDA tool should have independent workspace in separated directories