OpenBSD/loongson

OpenBSD/loongson is a port intended to run on systems based upon the Loongson (also known as Godson) 2E and 2F MIPS-compatible processors, using the PMON firmware and boot loader.

The current port maintainer is Miod Vallat (miod@openbsd.org).

Table of contents

• History of the port
• Supported hardware
• Current status
• Project list
• Getting and installing OpenBSD/loongson

History:

The idea of an OpenBSD/loongson started when the EMTEC Gdium Liberty netbook was announced. Unfortunately, the general availability of these machines kept being delayed. Because of this, focus switched to the Lemote Yeeloong netbook instead. After procrastinating for months, serious work started in August 2009, and the kernel work was completed by the end of November 2009.

Unfortunately, most of the Loongson 2F-based hardware available at that time suffers from serious problems in the processor's branch prediction logic, causing the system to freeze, for which no errata has been published except for an e-mail on a toolchain mailing-list.

After a rush of adding silicon problems workarounds, the port to the Lemote Yeeloong was completed and self hosting by the end of January 2010.

This solid foundation allowed for support for other designs to be added pretty quickly, over the next couple of weeks.

And work continues...

Supported hardware:

The OpenBSD/loongson kernel has generic support for systems built with either Loongson 2E processors and Algorithmics Bonito64 PCI and memory controller, or Loongson 2F processors with their integrated PCI/PCI-X and memory controller. Specific hardware support is then written on a design-by-design basis.

At the moment, the following machines are supported:

• Lemote Fuloong 2F mini-PC
  All on-board devices but the audio controller, framebuffer and infrared port are supported. The console must be on the serial port.
• Lemote Yeeloong netbook
  Both the 8.9" and 10.1" models are supported. All on-board devices but the audio controller are supported.
• EMTEC Gdium Liberty 1000 netbook
  All on-board devices but the audio controller are supported. (note that the on-board SD card reader does not support cards larger than 2GB)

Current status:

Development is currently pretty hectic at the moment, although it will slow down in preparation for the first OpenBSD/loongson release.

All supported systems run multiuser, and a currently unaccelerated X server is available for Lemote Yeeloong and Gdium Liberty systems.

Projects (in no particular order):

• Improve installation procedure, which is still rough at the moment.
• Write support for the on-board audio controller on Fuloong, Yeeloong and Gdium.
• Write a driver for the Sis 315 Pro framebuffer found on the Fuloong.
• Battery status on Yeeloong and Gdium Liberty.
• CPU frequency scaling on 2F systems.
• Suspend/resume on Yeeloong and Gdium Liberty.
• Support more hardware as our developers get their hands on more Loongson 2E- and 2F-based systems.

Getting and installing OpenBSD/loongson

There is no OpenBSD/loongson formal release yet.

Snapshots are made available from time to time, in this location as well as in a few mirrors. Here are the OpenBSD/loongson snapshot installation instructions as well.