Building Android for BeagleBone Black with Kernel 3.2

August 22, 2013 ezequielaceto

Note: SGX (hardware-accelerated OpenGL) is supported only in Kernel 3.2

Get source (using TI DevKit)

mkdir ~/ti-android-bbb cd ~/ti-android-bbb repo init -u git://gitorious.org/rowboat/manifest.git -m TI-Android-JB-4.2.2-DevKit-4.1.1.xml repo sync

Setup

export PATH=~/ti-android-bbb/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin:$PATH

Build U-Boot and X-Loader

cd ~/ti-android-bbb/u-boot make CROSS_COMPILE=arm-eabi- distclean make CROSS_COMPILE=arm-eabi- am335x_evm_config make CROSS_COMPILE=arm-eabi-

Build Android and Kernel with SGX On

cd ~/ti-android-bbb make TARGET_PRODUCT=beagleboneblack OMAPES=4.x make TARGET_PRODUCT=beagleboneblack fs_tarball

Creating the SD Card

mkdir ~/android-bbb-image cp ti-android-bbb/kernel/arch/arm/boot/uImage ~/android-bbb-image cp ti-android-bbb/u-boot/MLO ~/android-bbb-image cp ti-android-bbb/u-boot/u-boot.img ~/android-bbb-image cp ti-android-bbb/external/ti_android_utilities/am335x/u-boot-env/uEnv_beagleboneblack.txt ~/android-bbb-image cp ti-android-bbb/out/target/product/beagleboneblack/rootfs.tar.bz2 ~/android-bbb-image cp ti-android-bbb/external/ti_android_utilities/am335x/mk-mmc/mkmmc-android.sh ~/android-bbb-image cd ~/android-bbb-image sudo./mkmmc-android.sh /dev/sdX MLO u-boot.img uImage uEnv_beagleboneblack.txt rootfs.tar.bz2

Compiling Android with Kernel 3.8

August 22, 2013 ezequielaceto

Replace Rowboat default Kernel with Kernel 3.8

Note 1: SGX is not yet supported on Kernel 3.8 so there is no hardware-accelerated OpenGL on this release./pre>

Note 2: Consider Rowboat for BeagleBone Black was cloned at ~/rowboat-android-bbb and Kernel 3.8 is at ~/linux-dev

cd ~/rowboat-android-bbb mv kernel kernel.bkp ln -s ~/linux-dev/KERNEL kernel

Let's modify some Makefiles in order to use 'arm-linux-gnueabihf-' instead of 'arm-eabi' for compiling.
chmod 644 ~/rowboat-android-bbb/Makefile vi ~/rowboat-android-bbb/Makefile
And add a # (comment) in front of export PATH :=$(PATH):$(ANDROID_INSTALL_DIR)/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin.
Below that (new) comment add the following two lines and save
export PATH :=~/linux-dev/dl/gcc-linaro-arm-linux-gnueabihf-4.7-2013.04-20130415_linux/bin:$(PATH) export CC_PREFIX := arm-linux-gnueabihf-
Search the Makefile for references to arm-eabi- and replace them with $(CC_PREFIX). Once all the changes are saved, go on building Android with SGX support.
$ make TARGET_PRODUCT=beagleboneblack OMAPES=4.x droid -j4 (It takes more or less 2 hours on a Intel i5 with 8GB of RAM.)

BeagleBone Black and Linux Kernel 3.8 with Android support

August 22, 2013 ezequielaceto

Building Kernel 3.8 (with Device Tree)

cd ~/ git clone git://github.com/RobertCNelson/linux-dev.git cd linux-dev/ git checkout origin/am33x-v3.8 -b tmp ./build_kernel.sh
If ./build_kernel.sh fails with ‘undefined references’ to some functions in files like ‘menubox.c’ try running: sudo apt-get install libncurses5 libncurses5-dev libelf-dev libncurses5 libncursesw5-dev and then retry with ./build_kernel.sh.

Setting up Kernel 3.8.x for Android

Once in the Kernel Configuration Utility (kConfig) scroll down, and enter, ‘Device Drivers’.

Make sure the ‘Staging drivers’ are enabled, or enable them (an asterisk will appear between brackets)

Then, enter ‘Staging drivers’ -> ‘Android’. Enable all Android drivers. I recommend you to include them into the kernel, and not build them as module.