How to Make an Android SD Card Flash Image for MIPS CI20

Tool Chain
Before attempting the steps below please follow the directions for downloading and installing the appropriate tool chain here.

Build steps
Create a directory to hold the source tree

mkdir 

Enter new directory

cd 

Create repo and fetch contents

# Nougat repo init -u git://github.com/MIPS/manifests.git -b dev-mips-nougat-mr1 -m ci20-ng-7.1.1_r28.m1.xml repo sync # Marshmallow repo init -u git://github.com/MIPS/manifests.git -b dev-mips-marshmallow -m ci20-mm-6.0.0_r1.m1.xml repo sync # Lollipop repo init -u git://github.com/MIPS/manifests.git -b dev-mips-lollipop-mr1 -m ci20-lp-5.1.1_r6.m1.xml repo sync # KitKat repo init -u git://github.com/MIPS/manifests.git -b dev-mips-kitkat -m ci20-kk-4.4.2_r3.m1.xml repo sync

Set up environment variables needed to build image (Note. this takes 50Gb of space and quite a bit of time) export TOP=`pwd` source build/envsetup.sh       lunch aosp_ci20-userdebug export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/ # 'export JAVA_HOME=/usr/lib/jvm/java-6-oracle' will be needed for some of the releases older than Nougat

Run "make"

# UBIFS make -j  # You may need to adjust the number depending on your build system

# EXT4 make WITH_EXT4=true -j  # You may need to adjust the number depending on your build system

Insert an SD card to be written into the host system then run the following commands

cd device/imgtec/ci20/sdcardinstaller/

# UBIFS ./mksdcard /dev/sdX # The name of the SD card device may vary across systems

# EXT4 ./mksdcard-ext4 /dev/sdX

If you are using UBIFS the SD card can now be used to flash the CI20 NAND.

If you are using EXT4, the SD image is used as the boot image:

* Place the JP3 jumper to position 2-3, * Plug in the SD card and power on the board,

Github links
These repositories host the sources for the the kernel, u-boot and android.

https://github.com/MIPS/CI20_linux/tree/dev-mips-kitkat-v3.0.8

https://github.com/MIPS/CI20_u-boot/tree/dev-mips-kitkat-v2013.10

https://github.com/MIPS/CI20_android/tree/dev-mips-kitkat