LowRISC

lowRISC C.I.C. is a not-for-profit company headquartered in Cambridge, UK. It uses collaborative engineering to develop and maintain open source silicon designs and tools. lowRISC is active in RISC-V-related open source hardware and software development and stewards the OpenTitan project.

OpenTitan
OpenTitan is the first open source silicon Root of Trust (RoT) project. It is designed to be integrated into data center servers, storage devices, peripherals and other hardware. OpenTitan is under the stewardship of lowRISC and collaboratively developed by Google, ETH Zurich, Nuvoton, G+D Mobile Security, Seagate, and Western Digital. The OpenTitan source code is available on GitHub, released under the permissive Apache 2 license.

Ibex CPU core
Ibex is an embedded open source 32-bit in-order RISC-V CPU core, which has been taped out multiple times. Ibex is used in the OpenTitan chip. Development on Ibex started in 2015 under the name "Zero-riscy" and "Micro-riscy" at the ETH Zurich and University of Bologna, where it was part of the PULP platform. In December 2018 lowRISC took over the development. Luca Benini of the ETH Zurich sits on lowRISC' board.

Prototype 64-bit SoC design
The lowRISC prototype 64-bit SoC design is an open source Linux-capable 64-bit RISC-V SoC design. A first version preview release of the source code was made available in April 2015. Since then features were added, such as support for tagged memory and "minion cores", small CPU cores which are dedicated to I/O tasks. The latest version 0.6 was released in November 2018, and is available to download and try out on an FPGA.

Other projects
lowRISC initiated and led the upstreaming of the RISC-V LLVM backend, where Alex Bradbury is code owner.

Board of directors

 * Andy Hopper (Independent Chair)
 * Will Drewry (Google)
 * Gavin Ferris (CEO, lowRISC)
 * Robert Mullins (University of Cambridge)
 * Claudia Eckert (TU Munich, Fraunhofer AISEC)
 * Cyrus Stoller (Google)

Additionally, Mark Hayter of Google sits on the board as an observer.

History
lowRISC was spun out of the University of Cambridge Computer Lab in 2014 by Alex Bradbury, Robert Mullins, and Gavin Ferris with the goal of creating a fully open source SoC and low-cost development board.

In 2015 lowRISC became one of the founding members of the RISC-V Foundation (today: RISC-V International).

Since 2018 lowRISC has been focusing on collaborative engineering with partner organizations. In 2019 the OpenTitan project, stewarded by lowRISC, was announced.