E1XX Kernel hacking¶

Under construction. Al, the CROSS_COMPILE var and path need adapting for the Linaro toolchain.

How to build the kernel for the E1XX.

• Acquire a cross compiler. There are several ways to get a toolchain. The Linaro toolchain is probably the best at the moment: http://www.linaro.org/linaro-blog/2012/04/26/linaro-toolchain-binaries-2012-04-released/.

• Source a file that adds the cross compiler to your path.

export PATH=/usr/local/angstrom/arm/bin:${PATH}

export CROSS_COMPILE=arm-angstrom-linux-gnueabi-

export INSTALL_MOD_PATH=${HOME}/src/install/linux-omap-modules
export INSTALL_MOD_STRIP=1

• Clone the git repo: git clone git://github.com/balister/linux-omap-philip.git linux-omap

• cd linux-omap

• Checkout the E1XX branch: git checkout origin/e100-3.0-pm-2-bugfixes

• Give this branch a name: git checkout -b my-e100-kernel

• Create the kernel config file: cp defconfig .config

• Build the kernel: make ARCH=arm uImage

• Copy arch/arm/boot/uImage to the e1xx boot partition.

• Build the modules: make ARCH=arm modules

• Install the modules so we can make a tarball: make ARCH=arm modules_install

• ${HOME}/src/install/linux-omap-modules/lib/modules

• tar czvf modules.tgz ./3.0.0+/kernel

• Copy modules.tgz to the e1xx.

• cd /lib/modules

• tar xzvf modules.tgz

• Reboot.

• Run depmod

• Reboot again.