This page has information about the CE Linux Forum source tree.

Table of Contents:


Download the current version from the CELinux_040503_Release page.

Current Status

Linux Kernel Version

The source tree, as of 2004-05-03, is based on Linux kernel version 2.4.20.

The current CELF release is: May 5, 2004 (040503).

This is also known as the 'celf3' release.

For past releases, see the ReleaseInfoPage.

Major Technologies

Here is a list of some of the major technologies included in this tree:

<!> Note - we should make a page for each of the technologies listed above, with information about current status, separate patches (if available), open source projects, etc.)

Here are some other changes which I'm aware of:

Some of these technologies were incorporated into the 2.6 version Linux (from Thus, their use in this tree is only of interest in conjunction with a 2.4.x version of Linux.

Supported Platforms

Linux from supports a very large number of architectures and platforms. Only some of these platforms and architectures are actively maintained in the CELF tree. Since our intention is to track Linux as it comes from, many platforms that are not actively maintained by the forum will likely be found in the forum source tree. Therefore, you should use caution when using the forum source tree for your own projects.

When we say a board is supported, we mean that it is actively used by forum members, and that it is therefore known to at least boot on the indicated target hardware. It does NOT mean that the code for that board in the CELF tree is up-to-date or bug free.

The forum is not a service organization to answer questions or resolve problems with regard to any particular board or architecture. The forum may make information available to the public in an effort to help our members (and others) use a board in which we are interested. However, there is no guarantee of accuracy or correctness of such information.

If a board is listed in the table below, it only means that forum members are known to be working with this board, and there are reports that someone from the forum has used the board with the forum source code.

Supported Boards and Platforms




TI OMAP Innovator

TI OMAP 1510 (ARM9 core with DSP)

Included in 031030 (Oct. 30, 2003) release


Generic i386


Included in 040126 release


VIA Eden board

VIA ???? (x86 compatible)

Included in 040126 release


ARM Integrator board

ARM ???

Included in 040126 release


Renesas rts7751r2d board

SH7751R (SH-4 series)

Included in 040126 release


Toshiba rbtx4927 board

tx4927 (MIPS)

Included in 040304 release


Kyoto MicroComputer KZP SH board

SH7751R (SH-4 series)

Included in 040503 release


Renesas Solution Engine

SH7600 and SH7303

Included in 040503 release



VR5701 (MIPS)

Included in 040503 release


Samsung SMDK2440 board

S3C2440 (ARM 9 family?)

Included in 040503 release


Ratification Status

The technologies in the current CELF tree have not been ratified by the forum. What this means is that these technologies were selected because of preliminary interest in them, but the forum has not gone through an approval process to have them become official "Reference Implementations" (the meaning of which is described in the Membership Agreement of the forum).

History (or, why is the tree the way it is now?...)

2003-11-26 was the date of the first release of the source code. In that release, the source tree included only a few platforms. The forum is currently working on adding support for additional platforms to the forum source tree.

Also, the source tree includes a large number of other changes that were unrelated to the work of the CE Linux Forum. This is a result of Sony and Matsushita's selection of MontaVista as the contractor for several projects related to enhancement of Linux for use in Consumer Electronics products. These projects pre-dated the formation of the forum. However, the code base where these projects were performed also included other code which was hard to separate from forum-related code. Rather than wait to perform an exhaustive and possibly dangerous exercise in separating the two sets of changes, the code was donated by Sony and Matsushita to the forum as an integrated code base, in the hopes that this would allow for rapid progress by the forum.

Thus, the fact that the 2.4.x-based CELF source tree has lots of material unrelated to current CELF work is a historical artifact. This is something that we are trying to fix as we move forward.

Plans for the Future

In the future, our intention is to publish the source tree in two forms:

Real Soon Now (r), the forum will begin a 2.6-based tree, and will try to stay in synch with the versions of Linux.

/!\ It is NOT our intention to create a "fork" of Linux for use in CE products. /!\

Short term task list

See SourceTaskList for a list of short-term items we are working on for the tree.

Patch isolation and kernel version migration phases

In order to get to our desired condition of having separate patches based strictly on a tree, we plan to work in phases:

SourceTreeInformation (last edited 2008-05-07 18:22:06 by localhost)