FWRISC was developed on Centos 7 Linux. No attempt has yet been made to support FWRISC development on Windows or any other Linux distribution. Several software packages require 32-bit compatability libraries to be installed on a 64-bit Linux distribution.
Bourne shell was used for development. A C-Shell setup script is provided, but has little to no testing.
The FWRISC-S dependencies include some Scala/CHISEL which must be run using Java. Java 1.8 or higher is required.
Libero 11.9 was used to performa synthesis for Microsemi IGLOO2/Fusion2 devices. The synthesis scripts assume that you have the ‘libero’ on your search path, and that your licensing environment is properly configured.
Yosys 0.8+53 was used to perform synthesis for Lattice ICE40 devices. The synthesis scripts assume that you have ‘yosys’ on your search path.
CMake 3.12.4 is required by Zephyr. Please ensure that ‘cmake’ is in your search path.
The Zephyr SDK was used to provide cross-compilers for Zephyr and Zephyr applications. Please ensure that you have ZEPHR_TOOLCHAIN_VARIANT and ZEPHYR_SDK_INSTALL_DIR properly set.
Several scripts used by FWRISC require Python2 to be installed. Python 2.7.5 is provided by Centos7
Zephyr requires Python3, as well as several additional Python modules. You must install these required modules in your Python3 installation.
Verilator 4.010 was used for verification of the FWRISC core. Verilator must be compiled with FST support enabled. Please ensure that ‘verilator’ is on your search path.
GTKWave was used for viewing waveforms.
Centos7 provides GCC 4.8.5, which was used for compiling the simulation image and testbench.
GCC 7.3.0 was used for the cross-compiler used for all non-Zephyr tests. The cross compiler was created using cross-tool-scripts. Other cross compilers may be used, provided the executable names have a riscv32-unknown-elf- prefix (eg riscv32-unknown-elf-gcc). Please ensure riscv32-unknown-elf-gcc is on your search path.
The open-source Symbiyosys tool was used for formal analysis of several sub-blocks in the FWRISC-S core. Using the latest Symbiyosys built from GitHub is recommended.