RISC V Cores and SoCs

RISC-V Cores and SoC Overview

This document captures the status of various cores and SoCs that endeavor to implement the RISC-V specification. Note that none of these cores/SoCs have passed the in-development RISC-V compliance suite.

Please add to the list and fix inaccuracies.

Name	Links	Priv. spec	User spec	License	Maintainers
rocket	GitHub	1.11-draft	2.3-draft	BSD	SiFive, UCB Bar
freedom	GitHub	1.11-draft	2.3-draft	BSD	SiFive
Berkeley Out-of-Order Machine (BOOM)	GitHub	1.11-draft	2.3-draft	BSD	Esperanto, UCB Bar
ORCA	GitHub		RV32IM	BSD	VectorBlox
PULPino	Website,GitHub			Solderpad Hardware License v. 0.51	ETH Zurich, Università di Bologna
OPenV/mriscv	GitHub		RV32I(?)	MIT	OnChipUIS
VexRiscv	GitHub		RV32I[M][C]	MIT	SpinalHDL
Roa Logic RV12	GitHub	1.9.1	2.1	Non-Commercial License	Roa Logic
SCR1	GitHub	1.10	2.2, RV32I/E[MC]	Solderpad Hardware License v. 0.51	Syntacore
Hummingbird E200	GitHub	1.10	2.2, RV32IMAC	Apache 2.0	Bob Hu
Shakti	Website,GitHub	1.10	2.2, RV64IMAFD	BSD	IIT Madras
ReonV	GitHub			GPL v3

SoCs

Rocket Chip

• Maintainer(s): SiFive, UCB BAR
• License: BSD
• Repository URL: https://github.com/freechipsproject/rocket-chip
• Core: Rocket
• Links: FPGA-Accelerated Simulation Platform on Cloud FPGAs with Rocket Chip support (FireSim): https://fires.im, https://github.com/firesim/firesim

LowRISC

• Maintainer(s): LowRISC CIC
• License: BSD
• Repository URL: https://github.com/lowRISC/lowrisc-chip
• Core: RV32IM

Briey

• Maintainer(s): SpinalHDL
• License: MIT License
• Repository URL: https://github.com/SpinalHDL/VexRiscv#briey-soc
• Core: VexRiscv
• Interconnects: AXI4 / APB3

Riscy

• Maintainer(s): AleksandarKostovic
• License: MIT
• Repository URL: https://github.com/AleksandarKostovic/Riscy-SoC
• Core: RV64I

Raven

• Maintainer(s): RTimothyEdwards, mkkassem (efabless.com)
• License: ISC
• Repository URL: https://github.com/efabless/picorv32-soc-raven
• Core: PICORV32
• Links: https://ef.link/picorv32-soc-raven, http://ef.link/raven-soc-hackster

Chips

Include a chip if it has been fabricated and is either available for sale, available for preorder, or running production workloads internally, and if it has at least one RISC-V hard core (no FPGAs, but non-"SoC" products with controller cores are allowed).

FE310-G000

• Vendor: SiFive
• Core: E31
• ISA: RV32IMAC
• Availability: public since 2016Q4
• Used for: HiFive1 Arduino board
• Links: https://static.dev.sifive.com/FE310-G000.pdf

Freedom U540

• Vendor: SiFive
• CORE: U54 (4 cores), E51 (1 management core)
• ISA: RV64GC (application cores), RV64IMAC (management core)
• Used for: HiFive Unleashed development board
• Availability: announced 2018Q1, available for preorder
• Links: https://www.sifive.com/products/hifive-unleashed/

GAP8

• Vendor: GreenWaves Technologies
• Core: PULP / 1 + 8 RI5CY
• ISA: RV32IMC (+ Priviledged and custom ISA extensions)
• Availability: public since 2018Q1
• Used for: GAPuino development board
• Links: https://greenwaves-technologies.com/en/gap8-product/