tools/create_base_image_arm.sh

#!/bin/bash

# Copyright 2019 Google Inc. All rights reserved.

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

source "${ANDROID_BUILD_TOP}/external/shflags/src/shflags"

FLAGS_HELP="USAGE: $0 <KERNEL_DIR> [IMAGE]"

FLAGS "$@" || exit $?
eval set -- "${FLAGS_ARGV}"

for arg in "$@" ; do
	if [ -z $KERNEL_DIR ]; then
		KERNEL_DIR=$arg
	elif [ -z $IMAGE ]; then
		IMAGE=$arg
	else
		flags_help
		exit 1
	fi
done

if [ -z $KERNEL_DIR ] || [ -z $IMAGE ]; then
	flags_help
	exit 1
fi
if [ -e "${IMAGE}" ]; then
	echo "error: ${IMAGE} already exists"
	exit 1
fi
if [ ! -e "${KERNEL_DIR}" ]; then
	echo "error: can't find '${KERNEL_DIR}'. aborting..."
	exit 1
fi

# escalate to superuser
if [ $UID -ne 0 ]; then
	cd ${ANDROID_BUILD_TOP}
	. ./build/envsetup.sh
	lunch ${TARGET_PRODUCT}-${TARGET_BUILD_VARIANT}
	mmma external/u-boot
	cd -
	exec sudo -E "${0}" ${@}
fi

cd ${ANDROID_BUILD_TOP}/external/arm-trusted-firmware
CROSS_COMPILE=aarch64-linux-gnu- make PLAT=rk3399 DEBUG=0 ERROR_DEPRECATED=1 bl31
export BL31="${ANDROID_BUILD_TOP}/external/arm-trusted-firmware/build/rk3399/release/bl31/bl31.elf"
cd -

idbloader=`mktemp`
cd ${ANDROID_BUILD_TOP}/external/u-boot
make ARCH=arm CROSS_COMPILE=aarch64-linux-gnu- rock-pi-4-rk3399_defconfig
make ARCH=arm CROSS_COMPILE=aarch64-linux-gnu- -j`nproc`
${ANDROID_HOST_OUT}/bin/mkimage -n rk3399 -T rksd -d tpl/u-boot-tpl.bin ${idbloader}
cat spl/u-boot-spl.bin >> ${idbloader}
cd -

${ANDROID_BUILD_TOP}/kernel/tests/net/test/build_rootfs.sh -a arm64 -s buster -n ${IMAGE}
if [ $? -ne 0 ]; then
	echo "error: failed to build rootfs. exiting..."
	exit 1
fi
truncate -s +3G ${IMAGE}
e2fsck -f ${IMAGE}
resize2fs ${IMAGE}

mntdir=`mktemp -d`
if [ $? -ne 0 ]; then
	echo "error: failed to mkdir tmp. exiting..."
	exit 1
fi
mount ${IMAGE} ${mntdir}
if [ $? != 0 ]; then
	echo "error: unable to mount ${IMAGE} ${mntdir}"
	exit 1
fi

cat > ${mntdir}/boot/boot.cmd << "EOF"
load mmc ${devnum}:${distro_bootpart} 0x02080000 /boot/Image
load mmc ${devnum}:${distro_bootpart} 0x04000000 /boot/uInitrd
load mmc ${devnum}:${distro_bootpart} 0x01f00000 /boot/dtb/rockchip/rk3399-rock-pi-4.dtb
setenv finduuid "part uuid mmc ${devnum}:${distro_bootpart} uuid"
run finduuid
setenv bootargs "earlycon=uart8250,mmio32,0xff1a0000 console=ttyS2,1500000n8 loglevel=7 root=PARTUUID=${uuid} rootwait rootfstype=ext4 sdhci.debug_quirks=0x20000000"
booti 0x02080000 0x04000000 0x01f00000
EOF
${ANDROID_HOST_OUT}/bin/mkimage \
	-C none -A arm -T script -d ${mntdir}/boot/boot.cmd ${mntdir}/boot/boot.scr

cd ${KERNEL_DIR}
export PATH=${ANDROID_BUILD_TOP}/prebuilts/clang/host/linux-x86/clang-r353983c/bin:$PATH
export PATH=${ANDROID_BUILD_TOP}/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin:$PATH
make ARCH=arm64 CC=clang CROSS_COMPILE=aarch64-linux-androidkernel- \
      CLANG_TRIPLE=aarch64-linux-gnu- rockpi4_defconfig
make ARCH=arm64 CC=clang CROSS_COMPILE=aarch64-linux-androidkernel- \
      CLANG_TRIPLE=aarch64-linux-gnu- -j`nproc`

cp ${KERNEL_DIR}/arch/arm64/boot/Image ${mntdir}/boot/
mkdir -p ${mntdir}/boot/dtb/rockchip/
cp ${KERNEL_DIR}/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtb ${mntdir}/boot/dtb/rockchip/
cd -

sudo mount -o bind /proc ${mntdir}/proc
sudo mount -o bind /sys ${mntdir}/sys
sudo mount -o bind /dev ${mntdir}/dev

echo "Installing required packages..."
chroot ${mntdir} /bin/bash <<EOF
apt-get update
apt-get install -y -f initramfs-tools u-boot-tools network-manager openssh-server sudo
apt-get clean
EOF

echo "Turning on DHCP client..."
cat >${mntdir}/etc/systemd/network/dhcp.network <<EOF
[Match]
Name=en*

[Network]
DHCP=yes
EOF

echo "Creating cleanup script..."
cat > ${mntdir}/usr/local/bin/install-cleanup << "EOF"
#!/bin/bash
rm /etc/machine-id
rm /var/lib/dbus/machine-id
dbus-uuidgen --ensure
systemd-machine-id-setup

systemctl disable cleanup
rm /usr/local/bin/install-cleanup
EOF
chmod +x ${mntdir}/usr/local/bin/install-cleanup

echo "Creating cleanup service..."
cat > ${mntdir}/etc/systemd/system/cleanup.service << EOF
[Unit]
 Description=cleanup service
 ConditionPathExists=/usr/local/bin/install-cleanup

[Service]
 Type=simple
 ExecStart=/usr/local/bin/install-cleanup
 TimeoutSec=0
 StandardOutput=tty

[Install]
 WantedBy=multi-user.target
EOF

chroot ${mntdir} /bin/bash << "EOT"
echo "Adding user vsoc-01 and groups..."
useradd -m -G sudo -d /home/vsoc-01 --shell /bin/bash vsoc-01
echo -e "cuttlefish\ncuttlefish" | passwd
echo -e "cuttlefish\ncuttlefish" | passwd vsoc-01

echo "Enabling services..."
systemctl enable cleanup

echo "Creating Initial Ramdisk..."
update-initramfs -c -t -k "5.2.0"
mkimage -A arm -O linux -T ramdisk -C none -a 0 -e 0 -n uInitrd -d /boot/initrd.img-5.2.0 /boot/uInitrd-5.2.0
ln -s /boot/uInitrd-5.2.0 /boot/uInitrd
EOT

umount ${mntdir}/sys
umount ${mntdir}/dev
umount ${mntdir}/proc
umount ${mntdir}

# Turn on journaling
tune2fs -O ^has_journal ${IMAGE}
e2fsck -fy ${IMAGE} >/dev/null 2>&1

# Minimize rootfs filesystem
while true; do
	out=`sudo resize2fs -M ${IMAGE} 2>&1`
	if [[ $out =~ "Nothing to do" ]]; then
		break
	fi
done

# Minimize rootfs file size
block_count=`sudo tune2fs -l ${IMAGE} | grep "Block count:" | sed 's/.*: *//'`
block_size=`sudo tune2fs -l ${IMAGE} | grep "Block size:" | sed 's/.*: *//'`
sector_size=512
start_sector=32768
fs_size=$(( block_count*block_size ))
fs_sectors=$(( fs_size/sector_size ))
part_sectors=$(( ((fs_sectors-1)/2048+1)*2048 ))  # 1MB-aligned
end_sector=$(( start_sector+part_sectors-1 ))
secondary_gpt_sectors=33
fs_end=$(( (end_sector+secondary_gpt_sectors+1)*sector_size ))
image_size=$(( part_sectors*sector_size ))
truncate -s ${image_size} ${IMAGE}
e2fsck -fy ${IMAGE} >/dev/null 2>&1

# Create final image
tmpimg=`mktemp`
truncate -s ${fs_end} ${tmpimg}
mknod -m640 /dev/loop100 b 7 100
chown root:disk /dev/loop100

# Create GPT
sgdisk -Z -a1 ${tmpimg}
sgdisk -a1 -n:1:64:8127 -t:1:8301 -c:1:loader1 ${tmpimg}
sgdisk -a1 -n:2:8128:8191 -t:2:8301 -c:2:env ${tmpimg}
sgdisk -a1 -n:3:16384:24575 -t:3:8301 -c:3:loader2 ${tmpimg}
sgdisk -a1 -n:4:24576:32767 -t:4:8301 -c:4:trust ${tmpimg}
sgdisk -a1 -n:5:32768:${end_sector} -A:5:set:2 -t:5:8305 -c:5:rootfs ${tmpimg}

device=$(losetup -f)
losetup ${device} ${tmpimg}
partx -v --add ${device}

# copy over data
dd if=${idbloader} of=${device}p1
dd if=${ANDROID_BUILD_TOP}/external/u-boot/u-boot.itb of=${device}p3
dd if=${IMAGE} of=${device}p5 bs=1M

chown $SUDO_USER:`id -ng $SUDO_USER` ${tmpimg}
mv ${tmpimg} ${IMAGE}
partx -v --delete ${device}
losetup -d ${device}