Differences

This shows you the differences between two versions of the page.

--- en:u3_building_android [2015/09/17 15:14]
odroid [Android Kernel]
+++ en:u3_building_android [2015/09/17 15:15] (current)
odroid [Android Kernel]
@@ Line 1: / Line 1: @@
+====== Android ======
+This page introduce how you can download and compile the Android kernel for **ODROID-U3/X2**.
+To build the Android Kernel, we strongly recommend the **gcc version 4.4.1** .
+===== Toolchain =====
+Click one of the site to download toolchain to build Linux kernel.
+  * [[http://www.mdrjr.net/odroid/toots/arm-2010q1.tar.xz|Download Linux Kernel Toolchain(arm-2010q1)]]
+  * [[http://dn.odroid.com/toolchains/arm-2010q1.tar.xz|Download Linux Kernel Toolchain(arm-2010q1)]]
+Once the download is done, extract the tarball to **/opt/toolchains/**.
+<code>
+$ sudo mkdir -p /opt/toolchains
+$ unxz arm-2010q1.tar.xz
+$ tar xvf arm-2010q1.tar
+$ sudo mkdir /opt/toolchains
+$ sudo mv arm-2010q1 /opt/toolchains/
+</code>
+In order to add the toolchain path to PATH, paste below lines to **$HOME/.bashrc**.
+<code>
+export PATH=$PATH:/home/odroid/adt-bundle-linux-x86_64-20140702/sdk/platform-tools:/opt/toolchains/arm-2010q1/bin
+export ARCH=arm
+export CROSS_COMPILE=arm-none-linux-gnueabi-
+</code>
+You can apply the change if you login again or import
+to apply this change, login again or evaluate **$HOME/.bashrc** with source command.
+<code>
+$ source ~/.bashrc
+</code>
+You can check if the toolchain installed above works properly while checking the version of toolchain. If you can find **(Sourcery G++ Lite 2010q1-202) 4.4.1** at the end of the line, the toolchain is well installed.
+<code>
+$ source ~/.bashrc
+$ $ arm-none-linux-gnueabi-gcc --version
+arm-none-linux-gnueabi-gcc (Sourcery G++ Lite 2010q1-202) 4.4.1
+Copyright (C) 2009 Free Software Foundation, Inc.
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+</code>
+===== Checkout =====
+You can checkout **Kernel** source tree from **[[https://github.com/hardkernel/linux|Hardkernel's Github]]**, **Android platform** source tree from **[[https://github.com/hardkernel/android|Hardkernel's Github]]**.
+Please note that we distribute the Linux kernel in different branches for Android and other Linux distributions.
+==== Android Kernel ====
+<code>
+$ git clone --depth 1 https://github.com/hardkernel/linux.git -b odroid-3.0.y-android
+$ cd linux
+</code>
+==== Android Platform ====
+== android-4.1.2 ==
+<code>
+$ mkdir <Android Platform Folder Name>
+$ cd <Android Platform Folder Name>
+$ repo init -u https://github.com/hardkernel/android.git -b 4412_4.1.2_master
+$ repo sync
+$ repo start 4412_4.1.2_master --all
+</code>
+== android-4.4.4 ==
+<code>
+$ mkdir <Android Platform Folder Name>
+$ cd <Android Platform Folder Name>
+$ repo init -u https://github.com/hardkernel/android.git -b 4412_4.4.4_master
+$ repo sync
+$ repo start 4412_4.4.4_master --all
+</code>
+==== ====
+<WRAP  left round tip 70%>
+  * Visit this link to install the repo.
+[[http://source.android.com/source/downloading.html]]
+</WRAP>
+===== Compile =====
+Before compiling, you must configure for **ODROID-U3** with following command.
+==== Android Kernel ====
+=== Android-4.1.2 ===
+== ODROID-U2/U3 ==
+<code>
+$ make odroidu_android_422_defconfig
+$ make
+</code>
+== ODROID-X2 ==
+<code>
+$ make odroidx2_android_422_defconfig
+$ make
+</code>
+=== Android-4.4.4 ===
+We've merged the Kernel source into the Android repo. Android build-script also includes the Kernel compile.
+If you still want to compile only the kernel,
+<code>
+$ make odroidXX_android_442_defconfig
+$ make
+</code>
+==== Android Platform ====
+=== ODROID-U2/U3 ===
+<code>
+$ ./build_android.sh odroidu
+</code>
+=== ODROID-X2 ===
+<code>
+$ ./build_android.sh odroidx2
+</code>
+===== Installation =====
+There are different instructions to install Linux kernel image for Android and Linux. Since Android loads both from a kernel partition, we have to use **fastboot** to install into the dedicated partition. Please refer the partition table from [[http://odroid.com/dokuwiki/doku.php?id=en:u3_partition_table|here]]. In contrast, Linux boots by the instructions described in **boot.ini** the 1st FAT partition.
+This is the instruction to install kernel image, **zImage**, to the boot card.
+<code>
+$ sudo fastboot flash kernel <path/of/your/zImage>
+</code>
+This is to install android platform files, **system.img**, **userdata.img**, **cache.img**.
+<code>
+$ sudo fastboot flash system <path/of/your/system.img>
+$ sudo fastboot flash userdata <path/of/your/userdata.img>
+$ sudo fastboot flash cache <path/of/your/cache.img>
+</code>
+If you want to initialize the FAT partition, run this command.
+<code>
+$ sudo fatboot erase fat
+</code>
+[[http://codewalkerster.blogspot.kr/search?q=cross_compile]]