#!/bin/sh
set -e

# Change this
export SRCROOT=/src/FreeBSD/head
export MNTDIR=/mnt
export MAKEOBJDIRPREFIX=/src/FreeBSD/obj
export VCSRCROOT=/src/FreeBSD/vc
export GPU_MEM=128
export IMG=/src/FreeBSD/obj/bsd-pi.img

export TARGET_ARCH=armv6
export MAKESYSPATH=$SRCROOT/share/mk
export KERNCONF=RPI-B

KERNEL=`realpath $MAKEOBJDIRPREFIX`/arm.armv6/`realpath $SRCROOT`/sys/$KERNCONF/kernel
UBLDR=`realpath $MAKEOBJDIRPREFIX`/arm.armv6/`realpath $SRCROOT`/sys/boot/arm/uboot/ubldr
DTB=`realpath $MAKEOBJDIRPREFIX`/arm.armv6/`realpath $SRCROOT`/sys/$KERNCONF/bcm2835-rpi-b.dtb

build_videocore()
{
	mkdir -p $VCSRCROOT
	rm -Rf $VCSRCROOT/vchiq-freebsd
	rm -Rf $VCSRCROOT/userland
	git clone git://github.com/gonzoua/vchiq-freebsd.git $VCSRCROOT/vchiq-freebsd
	git clone git://github.com/gonzoua/userland.git $VCSRCROOT/userland

	eval $buildenv SYSDIR=$SRCROOT/sys make -C $VCSRCROOT/vchiq-freebsd clean
	eval $buildenv SYSDIR=$SRCROOT/sys make -C $VCSRCROOT/vchiq-freebsd 

	mkdir -p $VCSRCROOT/userland/build/arm-freebsd/release/
	cd $VCSRCROOT/userland/
	git checkout freebsd
	cd $VCSRCROOT/userland/build/arm-freebsd/release/
	eval $buildenv /usr/local/bin/cmake -DCMAKE_TOOLCHAIN_FILE=../../../makefiles/cmake/toolchains/arm-freebsd.cmake -DCMAKE_BUILD_TYPE=Release ../../..
	cd -
	eval $buildenv make -C $VCSRCROOT/userland/build/arm-freebsd/release/
}

install_videocore()
{
	eval $buildenv SYSDIR=$SRCROOT/sys make -C $VCSRCROOT/vchiq-freebsd DESTDIR=$MNTDIR install
	eval $buildenv make -C $VCSRCROOT/userland/build/arm-freebsd/release/ DESTDIR=$MNTDIR install
	echo /opt/vc/lib > $MNTDIR/etc/ld-elf.so.conf

	# hello_triangle demo, not really necessary
	cd $VCSRCROOT/userland/host_applications/linux/apps/hello_pi/hello_triangle
	eval $buildenv SDKSTAGE=$MNTDIR /usr/local/bin/gmake
	cp hello_triangle.bin *.raw $MNTDIR/root/
}

make -C $SRCROOT kernel-toolchain
make -C $SRCROOT KERNCONF=$KERNCONF WITH_FDT=yes buildkernel
make -C $SRCROOT MALLOC_PRODUCTION=yes buildworld

buildenv=`make -C $SRCROOT buildenvvars`

eval $buildenv make -C $SRCROOT/sys/boot clean
eval $buildenv make -C $SRCROOT/sys/boot obj
eval $buildenv make -C $SRCROOT/sys/boot UBLDR_LOADADDR=0x2000000 all

build_videocore

rm -f $IMG
dd if=/dev/zero of=$IMG bs=128M count=8
MDFILE=`mdconfig -a -f $IMG`
gpart create -s MBR ${MDFILE}

# Boot partition 
gpart add -s 32m -t '!12' ${MDFILE}
gpart set -a active -i 1 ${MDFILE}
newfs_msdos -L boot -F 16 /dev/${MDFILE}s1
mount_msdosfs /dev/${MDFILE}s1 $MNTDIR
fetch -q -o - http://people.freebsd.org/~gonzo/arm/rpi/freebsd-uboot-20121129.tar.gz | tar -x -v -z -C $MNTDIR -f -

cat >> $MNTDIR/config.txt <<__EOC__
gpu_mem=$GPU_MEM
device_tree=devtree.dat
device_tree_address=0x100
disable_commandline_tags=1
__EOC__

cp $UBLDR $MNTDIR
cp $DTB $MNTDIR/devtree.dat
umount $MNTDIR

# FreeBSD partition
gpart add -t freebsd ${MDFILE}
gpart create -s BSD ${MDFILE}s2
gpart add -t freebsd-ufs ${MDFILE}s2
newfs /dev/${MDFILE}s2a

# Turn on Softupdates
tunefs -n enable /dev/${MDFILE}s2a
# Turn on SUJ with a minimally-sized journal.
# This makes reboots tolerable if you just pull power on the BB
# Note:  A slow SDHC reads about 1MB/s, so a 30MB
# journal can delay boot by 30s.
tunefs -j enable -S 4194304 /dev/${MDFILE}s2a
# Turn on NFSv4 ACLs
tunefs -N enable /dev/${MDFILE}s2a

mount /dev/${MDFILE}s2a $MNTDIR

make -C $SRCROOT DESTDIR=$MNTDIR installkernel
make -C $SRCROOT DESTDIR=$MNTDIR installworld
make -C $SRCROOT DESTDIR=$MNTDIR distribution

install_videocore

echo 'fdt addr 0x100' > $MNTDIR/boot/loader.rc

echo '/dev/mmcsd0s2a / ufs rw,noatime 1 1' > $MNTDIR/etc/fstab

cat > $MNTDIR/etc/rc.conf <<__EORC__
hostname="raspberry-pi"
ifconfig_ue0="DHCP"
sshd_enable="YES"

# Turn off a lot of standard stuff
# for more free memory.
cron_enable="NO"
devd_enable="NO"
syslogd_enable="NO"
sendmail_submit_enable="NO"
sendmail_outbound_enable="NO"
sendmail_msp_queue_enable="NO"
__EORC__

cat > $MNTDIR/etc/ttys <<__EOTTYS__
ttyv0 "/usr/libexec/getty Pc" xterm on secure
ttyv1 "/usr/libexec/getty Pc" xterm on secure
ttyv2 "/usr/libexec/getty Pc" xterm on secure
ttyv3 "/usr/libexec/getty Pc" xterm on secure
ttyv4 "/usr/libexec/getty Pc" xterm on secure
ttyv5 "/usr/libexec/getty Pc" xterm on secure
ttyv6 "/usr/libexec/getty Pc" xterm on secure
ttyv7 "/usr/libexec/getty Pc" xterm on secure
ttyu0 "/usr/libexec/getty 3wire.115200" dialup on secure
__EOTTYS__

umount $MNTDIR
mdconfig -d -u $MDFILE