Linux Kernel

From Free60

There is a set of 7 patches available sent to the linuxppc mailing list on 08 March 2007, which have to be applied to Linux 2.6.20. If you're interested in kernel development and/or adding new features, please take a look at Linux Kernel Development.

• (patch 1/7) xenon: add PCI Vendor ID: Microsoft
• (patch 2/7) xenon: add platform support
• (patch 3/7) xenon: udbg support (ugly)
• (patch 4/7) xenon: add southbridge ethernet support
• (patch 5/7) xenon: add SATA support
• (patch 6/7) xenon: add SMC support
• (patch 7/7) xenon: add framebuffer support (ugly)

To run linux, you need to use the Linux Bootloader available right now. To compile the kernel, you need to set up a cross compiler toolchain (unless you already have another PowerPC Linux machine).

Contents 1 Prerequisites 2 Configuring and Compiling the Kernel 3 Configuring and Compiling the Kernel with experimental patches 4 Pre-compiled kernel

[edit] Prerequisites

The minimal requirements for successfully cross compiling the Linux Kernel for your Xbox are (unverified):

• A machine running a Linux based OS (most likely your PC)
• Sources for the Linux Kernel version 2.6.21, get them at kernel.org
• The Xenon patchset from above
• Binutils (targeting the powerpc architecture)
• GCC (targeting the powerpc architecture)

[edit] Configuring and Compiling the Kernel

1. Get the source for the Linux 2.6.21 Kernel from kernel.org and unpack it somewhere in your home directory.

    cd
    wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.21.tar.bz2
    tar -xvjf linux-2.6.21.tar.bz2

2. Download and apply the Xenon patchset from above to make your Kernel sources aware of the newly supported platform.

    cd linux-2.6.21/
    for patch in pci_ids.h.diff linux-2.6.21-xenon-cpu.diff linux-2.6.21-xenon.diff \
                 linux-2.6.21-xenon-enet.diff linux-2.6.21-xenon-platform.diff \
                 linux-2.6.21-xenon-sata.diff linux-2.6.21-xenon-smc.diff \
                 linux-2.6.21-xenon-ugly-fb.diff linux-2.6.21-xenon-ugly-udbg.diff \
                 interlace.diff ; do
            wget http://op-co.de/xbox360/2.6.21/$patch
            patch -p1 < $patch
    done

3. Configure the Kernel. You can manually fetch a configuration file from the internet (e.g. here) and type:

    make ARCH=powerpc CROSS_COMPILE=powerpc64-unknown-linux-gnu- oldconfig

Of course, you can fine-tune your Kernel configuration to fit your needs using

    make ARCH=powerpc CROSS_COMPILE=powerpc64-unknown-linux-gnu- menuconfig

4. Build the Kernel by typing:

    make ARCH=powerpc CROSS_COMPILE=powerpc64-unknown-linux-gnu- all

If everything goes well, you will end up with a file arch/powerpc/boot/zImage.xenon containing the kernel which can be loaded by the XeLL.

[edit] Configuring and Compiling the Kernel with experimental patches

1. Get the source for the Linux 2.6.24.3 Kernel from kernel.org and unpack it somewhere in your home directory.

    cd
    wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.24.3.tar.bz2
    tar -xvjf linux-2.6.24.3.tar.bz2

2. Download and apply the experimental Xenon patchset.

    cd linux-2.6.24.3/
    wget http://home.comcast.net/~ssmurf/linux-2.6.24.3-xenon.diff
    patch -p1 < linux-2.6.24.3-xenon.diff
    done

3. Configure the Kernel.

     make ARCH=powerpc CROSS_COMPILE=powerpc64-unknown-linux-gnu- menuconfig

4. Build the Kernel by typing:

    make ARCH=powerpc CROSS_COMPILE=powerpc64-unknown-linux-gnu- all
    

Or if you have ppu-gcc properly set-up: CROSS_COMPILE=ppu-

If everything goes well, you will end up with a file arch/powerpc/boot/zImage.xenon containing the kernel which can be loaded by the XeLL.

Remember, these patches are Experimental!

[edit] Pre-compiled kernel

http://home.comcast.net/~ssmurf/XeLL-Bootloader-sda2-v2.6.24.3.tar.gz