AOSP on NVIDIA Jetson Nano

Copyright (c) 2020-2021 Antmicro

This README contains build instructions for creating an AOSP image intended to be run on the Nvidia Jetson Nano platform. Preparing a BSP for running this image on Antmicro's Jetson Nano Baseboard is described in a separate guide.

Build instructions - AOSP image

The following instructions are targeted for a Debian 10 system; the package installation process needs to be adjusted to your specific distribution.

1. Install required dependencies

sudo apt-get install git git-core build-essential bc wget xxd python python3 locales-all curl ninja-build procps unzip m4 libncurses5 rsync

2. Fetch and install the repo tool

mkdir -p ~/bin
PATH=~/bin:$PATH
curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
chmod a+x ~/bin/repo

3. Fetch the AOSP sources

mkdir aosp
cd aosp
repo init -u https://github.com/antmicro/kvm-aosp-manifest.git -b kvm-aosp
repo sync

4. Configure and build the AOSP image

source build/envsetup.sh
lunch aosp_arm64-eng
m

5. Create RW images for the system and vendor partitions

By default the system and vendor images use the ext4 filesystem with a feature called EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS, which makes it impossible to mount with write permissions. SELinux needs write access to those partitions during boot, so they need to be recreated to allow it.

mkdir {system,vendor}-r{o,w}
dd if=/dev/zero of=system-rw.img bs=512 count=6291456
mkfs.ext4 system-rw.img -L "/"
sudo mount system-rw.img system-rw
sudo mount out/target/product/generic_arm64/system.img system-ro -o ro
sudo rsync -avxHAX system-r{o,w}/
sudo umount system-r{o,w}
mv system-rw.img out/target/product/generic_arm64/system.img

dd if=/dev/zero of=vendor-rw.img bs=512 count=1048576
mkfs.ext4 vendor-rw.img -L "vendor"
mount vendor-rw.img vendor-rw
mount out/target/product/generic_arm64/vendor.img vendor-ro -o ro
rsync -avxHAX vendor-r{o,w}/
sudo umount vendor-r{o,w}
mv vendor-rw.img out/target/product/generic_arm64/vendor.img

Output files

The output of the AOSP build are partition images. The resulting files required to run the system are:

out/target/product/generic_arm64/vendor.img
out/target/product/generic_arm64/system.img
out/target/product/generic_arm64/userdata.img
out/target/product/generic_arm64/ramdisk.img

Build instructions - AOSP kernel

1. Fetch the kernel sources

mkdir aosp_kernel
cd aosp_kernel
repo init -u https://android.googlesource.com/kernel/manifest -b q-common-android-4.14
repo sync

2. Configure and build the kernel

BUILD_CONFIG=./common/build.config.cuttlefish.aarch64 ./build/build.sh

Output files

The resulting file needed to run the system is the kernel image, located here:

out/android-4.14-q/common/arch/arm64/boot/Image