Quickstart

The GRX930 SoC simulates with Icarus Verilog, a free, open-source simulator. No EDA license is needed.

Prerequisites

sudo apt install iverilog python3

The firmware tests also need a RISC-V GCC toolchain (riscv64-unknown-elf-gcc).

Clone and run

git clone https://github.com/kubeworkz/grx930.git
cd grx930/c930
make npu

make npu runs the NPU integer GEMM tests across all matrix sizes. It takes about a minute.

More test targets

Target	What it runs	Time
make npu	NPU integer GEMM, all matrix sizes	~1 min
make npu_float	NPU FP16 / BF16 GEMM	~2 min
make hazard	CPU hazard unit: CSR flush, stalls	~30 s
make hazard_equiv	Hazard unit equivalence, 300K cycles	~5 min
make arb_equiv	DMA arbiter equivalence, 1,200+ transactions	~3 min
make soc	Full SoC with firmware, 11 tests	~10 min
make soc_full	Full SoC with DDR and all peripherals	~15 min
make quad	Quad-core coherency	~10 min
make l2_coherent	L2 cache coherence	~10 min

Build for an FPGA

The FPGA flow targets the Nexys Video board (Artix-7 xc7a200tfbg484-1) and uses Vivado:

cd grx930/c930
make vivado_synth

See the board pinout and the grx930 README for programming the board.

The G100 GPU

The G100 has its own build and simulators. See G100 GPU.