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#!/bin/sh
enable_serial_console() {
# By default, spawn a console on the serial port
device="$1"
echo "Adding a getty on the serial port"
echo "T0:12345:respawn:/sbin/getty -L $device 115200 vt100" >> /etc/inittab
}
beaglebone_setup_boot() {
# Setup uEnv.txt
if grep -q btrfs /etc/fstab ; then
fstype=btrfs
else
fstype=ext4
fi
kernelVersion=$(ls /usr/lib/*/am335x-boneblack.dtb | head -1 | cut -d/ -f4)
version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
initRd=initrd.img-$version
vmlinuz=vmlinuz-$version
# uEnv.txt for Beaglebone
# based on https://github.com/beagleboard/image-builder/blob/master/target/boot/beagleboard.org.txt
cat >> /boot/uEnv.txt <<EOF
mmcroot=/dev/mmcblk0p2 ro
mmcrootfstype=$fstype rootwait fixrtc
mmcrootflags=subvol=@
console=ttyO0,115200n8
kernel_file=$vmlinuz
initrd_file=$initRd
loadaddr=0x80200000
initrd_addr=0x81000000
fdtaddr=0x80F80000
initrd_high=0xffffffff
fdt_high=0xffffffff
loadkernel=load mmc \${mmcdev}:\${mmcpart} \${loadaddr} \${kernel_file}
loadinitrd=load mmc \${mmcdev}:\${mmcpart} \${initrd_addr} \${initrd_file}; setenv initrd_size \${filesize}
loadfdt=load mmc \${mmcdev}:\${mmcpart} \${fdtaddr} /dtbs/\${fdtfile}
loadfiles=run loadkernel; run loadinitrd; run loadfdt
mmcargs=setenv bootargs console=tty0 console=\${console} root=\${mmcroot} rootfstype=\${mmcrootfstype} rootflags=\${mmcrootflags}
uenvcmd=run loadfiles; run mmcargs; bootz \${loadaddr} \${initrd_addr}:\${initrd_size} \${fdtaddr}
EOF
mkdir -p /boot/dtbs
cp /usr/lib/linux-image-*-armmp/* /boot/dtbs
}
beaglebone_flash() {
# allow flash-kernel to work without valid /proc contents
# ** this doesn't *really* work, since there are too many checks
# that fail in an emulated environment! We'll have to do it by
# hand below anyway...
export FK_MACHINE="TI AM335x BeagleBone"
apt-get install -y flash-kernel
}
beaglebone_repack_kernel() {
# process installed kernel to create uImage, uInitrd, dtb
# using flash-kernel would be a good approach, except it fails in the
# cross build environment due to too many environment checks...
#FK_MACHINE="TI AM335x BeagleBone" flash-kernel
# so, let's do it manually...
# flash-kernel's hook-functions provided to mkinitramfs have the
# unfortunate side-effect of creating /conf/param.conf in the initrd
# when run from our emulated chroot environment, which means our root=
# on the kernel command line is completely ignored! repack the initrd
# to remove this evil...
echo "info: repacking beaglebone kernel and initrd"
kernelVersion=$(ls /usr/lib/*/am335x-boneblack.dtb | head -1 | cut -d/ -f4)
version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
initRd=initrd.img-$version
vmlinuz=vmlinuz-$version
mkdir /tmp/initrd-repack
(cd /tmp/initrd-repack ; \
zcat /boot/$initRd | cpio -i ; \
rm -f conf/param.conf ; \
find . | cpio --quiet -o -H newc | \
gzip -9 > /boot/$initRd )
rm -rf /tmp/initrd-repack
(cd /boot ; \
cp /usr/lib/$kernelVersion/am335x-boneblack.dtb dtb ; \
cat $vmlinuz dtb >> temp-kernel ; \
mkimage -A arm -O linux -T kernel -n "Debian kernel ${version}" \
-C none -a 0x80200000 -e 0x80200000 -d temp-kernel uImage ; \
rm -f temp-kernel ; \
mkimage -A arm -O linux -T ramdisk -C gzip -a 0x81000000 -e 0x81000000 \
-n "Debian ramdisk ${version}" \
-d $initRd uInitrd )
}
cubieboard2_setup_boot() {
# Setup boot.cmd
if grep -q btrfs /etc/fstab ; then
fstype=btrfs
else
fstype=ext4
fi
kernelVersion=$(ls /usr/lib/*/sun7i-a20-cubieboard2.dtb | head -1 | cut -d/ -f4)
version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
initRd=initrd.img-$version
vmlinuz=vmlinuz-$version
# boot.cmd for CubieTruck
cat >> /boot/boot.cmd <<EOF
setenv mmcdev 0
setenv mmcpart 1
setenv mmcroot /dev/mmcblk0p2 ro
setenv mmcrootfstype $fstype rootwait fixrtc
setenv mmcrootflags subvol=@
setenv console ttyS0,115200n8
setenv kernel_file $vmlinuz
setenv initrd_file $initRd
setenv loadaddr 0x46000000
setenv initrd_addr 0x48000000
setenv fdtaddr 0x47000000
setenv initrd_high 0xffffffff
setenv fdt_high 0xffffffff
setenv loadkernel load mmc \${mmcdev}:\${mmcpart} \${loadaddr} \${kernel_file}
setenv loadinitrd load mmc \${mmcdev}:\${mmcpart} \${initrd_addr} \${initrd_file}\\; setenv initrd_size \\\${filesize}
setenv loadfdt load mmc \${mmcdev}:\${mmcpart} \${fdtaddr} /dtbs/\${fdtfile}
setenv loadfiles run loadkernel\\; run loadinitrd\\; run loadfdt
setenv mmcargs setenv bootargs console=\${console} root=\${mmcroot} rootfstype=\${mmcrootfstype} rootflags=\${mmcrootflags}
run loadfiles; run mmcargs; bootz \${loadaddr} \${initrd_addr}:\${initrd_size} \${fdtaddr}
EOF
# boot.scr for CubieTruck
mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr
# DTBs for CubieTruck
mkdir -p /boot/dtbs
cp /usr/lib/$kernelVersion/* /boot/dtbs
# extra boot modules
echo "rtc_sunxi" >> /etc/initramfs-tools/modules
}
case "$MACHINE" in
beaglebone)
beaglebone_setup_boot
beaglebone_flash
beaglebone_repack_kernel
enable_serial_console ttyO0
;;
cubieboard2)
cubieboard2_setup_boot
enable_serial_console ttyS0
;;
esac