.. zephyr:board:: cv64a6_genesys_2

Overview

The Digilent Genesys 2 board features a Xilinx Kintex-7 FPGA which can run various softcore CPUs. In this configuration, the Genesys 2 is configured with a 64-bit version of the CVA6 RISC-V CPU. The SoC is configured with a memory controller interfacing with the Genesys' DRAM, PLIC and CLINT interrupt controllers, a UART device interfacing with the Genesys' USB UART, a RISC-V compatible debug module that interfaces with the Genesys' FTDI (USB JTAG) chip, a Xilinx SPI interface interfacing with the Genesys' SD card slot and a Xilinx GPIO interfacing with the Genesys' LEDs and switches. The complete hardware sources (see first reference) in conjunction with instructions for compiling and loading the configuration onto the Genesys 2 are available.

See the following references for more information:

CVA6 documentation_
Genesys 2 Reference Manual_
Genesys 2 Schematic_

Hardware

CVA6 CPU with RV64imafdc instruction sets and an SV39 MMU
1 GB DDR3 DRAM
10/100/1000 Ethernet with copper interface, lowRISC Ethernet MAC
ns16550a-compatible USB UART, 115200 baud
RISCV debug module, connected via on-board FTDI (USB JTAG)
Xilinx SPI controller, connected to microSD slot
Xilinx GPIO, connected to 7 switches and LEDs

Supported Features

.. zephyr:board-supported-hw::

Programming and Debugging

Loading the FPGA configuration

You need to build a bitstream with Xilinx Vivado and load it into the FPGA before you can load zephyr onto the board. Please refer to the CVA6 documentation for the required steps. This configuration is compatible with the following build target: cv64a6_sv39

Flashing

west flash is supported via the openocd runner. Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: cv64a6_genesys_2 :goals: build flash

Debugging

west debug, attach and debugserver commands are supported via the openocd runner. Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: cv64a6_genesys_2 :goals: build debug

References

.. _CVA6 documentation: https://github.com/openhwgroup/cva6

.. _Genesys 2 Reference Manual: https://digilent.com/reference/programmable-logic/genesys-2/reference-manual

.. _Genesys 2 Schematic: https://digilent.com/reference/_media/reference/programmable-logic/genesys-2/genesys-2_sch.pdf