Ubuntu kernel
From OMAPpedia
 | How to get started with Ubuntu using pre-built binaries on your OMAP Platform | |||||||||
| Overview | Step 1 | Step 2 | Step 3 | Step 4 | Step 5 | Step 6 | Step 7 | Step 8 | Step 9 | |
- Step 3
Building for OMAP4 platform devices
Contents |
[edit] Blaze Platform
[edit] Ubuntu kernel
There are several sources for Ubuntu kernel supporting OMAP4:
- Official Ubuntu git tree: http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-maverick.git, ti-omap4 branch
- TI Ubuntu git tree: http://dev.omapzoom.org/?p=integration/kernel-ubuntu.git
For Blaze board support, today, the TI git tree shall be and is used in the following instructions.
[edit] TI Ubuntu git tree structure
The TI git tree hosting Ubuntu kernel has branches for each supported kernel version into ti-ubuntu-2.6.xx branches. For example, the 2.6.34 kernel is available into the ti-ubuntu-2.6.34 branch.
Some specific kernel versions are tagged. The stable versions have a tag message indicating they are stable versions. It is advised to exclusively use tags specified as 'stable'.
[edit] Building a Ubuntu kernel
Some packages are required on your Ubuntu workstation. To install them:
sudo apt-get install git-core debhelper build-essential fakeroot kernel-wedge uboot-mkimage
- Clone the kernel git tree
git clone git://dev.omapzoom.org/pub/scm/integration/kernel-ubuntu.git
- checkout a stable tag version, ex:
git checkout ti-ubuntu-2.6.34-901.2+ti+release0
- Build the kernel
cd <kernel source root path> fakeroot debian/rules clean export $(dpkg-architecture -aarmel) CROSS_COMPILE=arm-none-linux-gnueabi- skipabi=true skipmodule=true fakeroot debian/rules binary-arch
=> Generates .deb packages in the parent folder (plus other .udeb files). It contains the kernel image and the modules. The linux-image*.deb file will be used later.
Note: for newer version of the kernel the debian rule is binary-omap4 instead of binary-arch
- Generate the kernel uImage
sudo mkimage -A arm -O linux -T kernel -C none -a 0x80008000 -e 0x80008000 -n "Ubuntu Kernel" -d <generated vmlinuz file> ./uImage
The kernel vmlinuz file can be found in a folder which name varies according to the kernel version, like: debian/kernel-image-2.6.<xx>-<yyy>-omap4-di/boot/vmlinuz.
So complete example command:
sudo mkimage -A arm -O linux -T kernel -C none -a 0x80008000 -e 0x80008000 -n "Ubuntu Kernel" -d debian/kernel-image-2.6.34-901-omap4-di/boot/vmlinuz ./uImage
=> This uImage file will have to be copied on the SD card.
=> if you are not sudoer on your machine you can use fakeroot instead of sudo.
Note: more information on Ubuntu kernel packaging / building: https://wiki.ubuntu.com/KernelTeam/KernelMaintenanceStarter.
| 
| 
|
| Previous | Home | Next |
