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#!/bin/sh
#-
# Copyright (c) 2015-2017 The FreeBSD Foundation
# All rights reserved.
#
# Portions of this software were developed by Glen Barber
# under sponsorship from the FreeBSD Foundation.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# Common subroutines used to build arm, arm64, or RISC-V SD card images.
#
# $FreeBSD$
#

cleanup() {
	if [ -c "${DESTDIR}/dev/null" ]; then
		umount_loop ${DESTDIR}/dev 2>/dev/null
	fi
	umount_loop ${DESTDIR}
	if [ ! -z "${mddev}" ]; then
		mdconfig -d -u ${mddev}
	fi

	return 0
}

umount_loop() {
	DIR=$1
	i=0
	sync
	while ! umount ${DIR}; do
		i=$(( $i + 1 ))
		if [ $i -ge 10 ]; then
			# This should never happen.  But, it has happened.
			echo "Cannot umount(8) ${DIR}"
			echo "Something has gone horribly wrong."
			return 1
		fi
		sleep 1
	done

	return 0
}

arm_create_disk() {
	# Create the target raw file and temporary work directory.
	chroot ${CHROOTDIR} gpart create -s ${PART_SCHEME} ${mddev}
	if [ "${PART_SCHEME}" == "GPT" ]; then
		chroot ${CHROOTDIR} gpart add -t efi -l efi -a 512k -s ${FAT_SIZE} ${mddev}
		chroot ${CHROOTDIR} newfs_msdos -L efi -F ${FAT_TYPE} /dev/${mddev}p1
		chroot ${CHROOTDIR} gpart add -t freebsd-ufs -l rootfs -a 64k ${mddev}
		chroot ${CHROOTDIR} newfs -U -L rootfs /dev/${mddev}p2
	fi
	if [ "${PART_SCHEME}" == "MBR" ]; then
		chroot ${CHROOTDIR} gpart add -t '!12' -a 512k -s ${FAT_SIZE} ${mddev}
		chroot ${CHROOTDIR} gpart set -a active -i 1 ${mddev}
		chroot ${CHROOTDIR} newfs_msdos -L msdosboot -F ${FAT_TYPE} /dev/${mddev}s1
		chroot ${CHROOTDIR} gpart add -t freebsd ${mddev}
		chroot ${CHROOTDIR} gpart create -s bsd ${mddev}s2
		chroot ${CHROOTDIR} gpart add -t freebsd-ufs -a 64k /dev/${mddev}s2
		chroot ${CHROOTDIR} newfs -U -L rootfs /dev/${mddev}s2a
	fi

	return 0
}

arm_create_user() {
	# Create a default user account 'freebsd' with the password 'freebsd',
	# and set the default password for the 'root' user to 'root'.
	chroot ${CHROOTDIR} /usr/sbin/pw -R ${DESTDIR} \
		groupadd freebsd -g 1001
	chroot ${CHROOTDIR} mkdir -p ${DESTDIR}/home/freebsd
	chroot ${CHROOTDIR} /usr/sbin/pw -R ${DESTDIR} \
		useradd freebsd \
		-m -M 0755 -w yes -n freebsd -u 1001 -g 1001 -G 0 \
		-c 'FreeBSD User' -d '/home/freebsd' -s '/bin/csh'
	chroot ${CHROOTDIR} /usr/sbin/pw -R ${DESTDIR} \
		usermod root -w yes

	return 0
}

arm_setup_usb_otg() {
	# Set up virtual serial port over USB OTG / device mode.
	echo >> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
	echo '# Required for USB OTG virtual serial port.' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
	echo 'notify 100 {' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
	echo '	match "system"		"DEVFS";' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
	echo '	match "subsystem"	"CDEV";' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
	echo '	match "type"		"CREATE";' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
	echo '	match "cdev"		"ttyU[0-9]+";' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
	echo '	action "/sbin/init q";' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
	echo '};' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf

	echo '# USB OTG virtual serial port' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/ttys
	echo 'ttyU0	"/usr/libexec/getty 3wire"	vt100	onifconsole  secure' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/ttys
	echo 'ttyU1	"/usr/libexec/getty 3wire"	vt100	onifconsole  secure' \
		>> ${CHROOTDIR}/${DESTDIR}/etc/ttys

	echo '# Configure USB OTG; see usb_template(4).' \
		>> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
	echo 'hw.usb.template=3' \
		>> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
	echo 'umodem_load="YES"' \
	     >> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
}

arm64_setup_multicons() {
	if [ "${EMBEDDED_TARGET_ARCH}" != "aarch64" ]; then
		return
	fi

	echo '# Multiple console (serial+efi gop) enabled.' \
		>> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
	echo 'boot_multicons="YES"' \
	     >> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
	echo 'boot_serial="YES"' \
	     >> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
}

arm_setup_fdt_overlays() {
	if [ -z "${FDT_OVERLAYS}" ]; then
		return
	fi

	echo '# DTB OVERLAYS' \
		>> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
	echo "fdt_overlays=\"${FDT_OVERLAYS}\"" \
	     >> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
}

arm_setup_minimal_loader() {
	echo '# Disable the beastie menu and color' \
		>> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
	echo 'beastie_disable="YES"' \
		>> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
	echo 'loader_color="NO"' \
		>> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
}

arm_install_base() {
	if [ "${PART_SCHEME}" == "GPT" ]; then
		chroot ${CHROOTDIR} mount /dev/${mddev}p2 ${DESTDIR}
	fi
	if [ "${PART_SCHEME}" == "MBR" ]; then
		chroot ${CHROOTDIR} mount /dev/${mddev}s2a ${DESTDIR}
	fi
	_OSVERSION=$(chroot ${CHROOTDIR} /usr/bin/uname -U)
	REVISION=$(chroot ${CHROOTDIR} make -C /usr/src/release -V REVISION)
	BRANCH=$(chroot ${CHROOTDIR} make -C /usr/src/release -V BRANCH)
	export UNAME_r=${REVISION}-${BRANCH}
	eval chroot ${CHROOTDIR} make -C ${WORLDDIR} \
		TARGET=${EMBEDDED_TARGET} \
		TARGET_ARCH=${EMBEDDED_TARGET_ARCH} \
		DESTDIR=${DESTDIR} KERNCONF=${KERNEL} \
		${CONF_FILES} installworld installkernel distribution
	chroot ${CHROOTDIR} mkdir -p ${DESTDIR}/boot/msdos

	arm_create_user
	arm_setup_usb_otg
	arm64_setup_multicons
	arm_setup_fdt_overlays
	arm_setup_minimal_loader
	arm_do_quirk

	echo '# Custom /etc/fstab for FreeBSD embedded images' \
		> ${CHROOTDIR}/${DESTDIR}/etc/fstab
	if [ "${PART_SCHEME}" == "GPT" ]; then
		echo "/dev/ufs/rootfs   /       ufs     rw      1       1" \
			>> ${CHROOTDIR}/${DESTDIR}/etc/fstab
		echo "/dev/msdosfs/EFI /boot/efi msdosfs rw,noatime 0 0" \
			>> ${CHROOTDIR}/${DESTDIR}/etc/fstab
	fi
	if [ "${PART_SCHEME}" == "MBR" ]; then
		echo "/dev/ufs/rootfs   /       ufs     rw      1       1" \
			>> ${CHROOTDIR}/${DESTDIR}/etc/fstab
		echo "/dev/msdosfs/MSDOSBOOT /boot/msdos msdosfs rw,noatime 0 0" \
			>> ${CHROOTDIR}/${DESTDIR}/etc/fstab
	fi
	echo "tmpfs /tmp tmpfs rw,mode=1777,size=50m 0 0" \
		>> ${CHROOTDIR}/${DESTDIR}/etc/fstab

	local hostname
	hostname="$(echo ${KERNEL} | tr '[:upper:]' '[:lower:]')"
	echo "hostname=\"${hostname}\"" > ${CHROOTDIR}/${DESTDIR}/etc/rc.conf
	echo 'ifconfig_DEFAULT="DHCP"' >> ${CHROOTDIR}/${DESTDIR}/etc/rc.conf
	echo 'sshd_enable="YES"' >> ${CHROOTDIR}/${DESTDIR}/etc/rc.conf
	echo 'sendmail_enable="NONE"' >> ${CHROOTDIR}/${DESTDIR}/etc/rc.conf
	echo 'sendmail_submit_enable="NO"' >> ${CHROOTDIR}/${DESTDIR}/etc/rc.conf
	echo 'sendmail_outbound_enable="NO"' >> ${CHROOTDIR}/${DESTDIR}/etc/rc.conf
	echo 'sendmail_msp_queue_enable="NO"' >> ${CHROOTDIR}/${DESTDIR}/etc/rc.conf
	echo 'growfs_enable="YES"' >> ${CHROOTDIR}/${DESTDIR}/etc/rc.conf

	sync
	umount_loop ${CHROOTDIR}/${DESTDIR}

	return 0
}

arm_install_boot() {
	FATMOUNT="${DESTDIR%${KERNEL}}/fat"
	UFSMOUNT="${DESTDIR%${KERNEL}}/ufs"
	chroot ${CHROOTDIR} mkdir -p "${FATMOUNT}" "${UFSMOUNT}"
	if [ "${PART_SCHEME}" == "GPT" ]; then
		dospart="/dev/${mddev}p1"
		ufspart="/dev/${mddev}p2"
	fi
	if [ "${PART_SCHEME}" == "MBR" ]; then
		dospart="/dev/${mddev}s1"
		ufspart="/dev/${mddev}s2a"
	fi

	chroot ${CHROOTDIR} mount_msdosfs ${dospart} ${FATMOUNT}
	chroot ${CHROOTDIR} mount ${ufspart} ${UFSMOUNT}

	if [ "${EMBEDDED_TARGET}" == "arm" ]; then
	chroot ${CHROOTDIR} cp -p ${UFSMOUNT}/boot/ubldr.bin \
		${FATMOUNT}/ubldr.bin
	fi

	BOOTFILES="$(chroot ${CHROOTDIR} \
		env TARGET=${EMBEDDED_TARGET} TARGET_ARCH=${EMBEDDED_TARGET_ARCH} \
		WITH_UNIFIED_OBJDIR=yes \
		make -C ${WORLDDIR}/stand -V .OBJDIR)"
	BOOTFILES="$(chroot ${CHROOTDIR} realpath ${BOOTFILES})"

	chroot ${CHROOTDIR} mkdir -p ${FATMOUNT}/EFI/BOOT
	chroot ${CHROOTDIR} cp -p ${BOOTFILES}/efi/loader_lua/loader_lua.efi \
		${FATMOUNT}/EFI/BOOT/$(efi_boot_name ${EMBEDDED_TARGET})

	chroot ${CHROOTDIR} cp -R ${UFSMOUNT}/boot/dtb ${FATMOUNT}

	chroot ${CHROOTDIR} touch ${UFSMOUNT}/firstboot
	sync
	umount_loop ${CHROOTDIR}/${FATMOUNT}
	umount_loop ${CHROOTDIR}/${UFSMOUNT}
	chroot ${CHROOTDIR} rmdir ${FATMOUNT}
	chroot ${CHROOTDIR} rmdir ${UFSMOUNT}
}

arm_install_uboot() {
	# Override in the ${EMBEDDED_TARGET}/${BOARDNAME}.conf file.

	return 0
}

arm_do_quirk() {
	# Override in the ${EMBEDDED_TARGET}/${BOARDNAME}.conf file.
}