Repacking the beaglebone kernel

This commit is contained in:
Bob Mottram 2017-05-31 10:05:49 +01:00
parent a73b4a02ab
commit e02268012b
1 changed files with 125 additions and 102 deletions

View File

@ -38,35 +38,125 @@ enable_serial_console() {
echo "T0:12345:respawn:/sbin/getty -L $device 115200 vt100" >> /etc/inittab
}
setup_flash_kernel() {
if [ ! -d /etc/flash-kernel ] ; then
mkdir /etc/flash-kernel
fi
echo -n "$1" > /etc/flash-kernel/machine
beaglebone_setup_boot() {
bbb_version=$1
command_line=""
if [ -n "$2" ] ; then
command_line="console=$2"
# Setup uEnv.txt
if grep -q btrfs /etc/fstab ; then
fstype=btrfs
else
fstype=ext4
fi
if [ -n "$command_line" ] ; then
echo flash-kernel flash-kernel/linux_cmdline string "$command_line" | debconf-set-selections
if [ ! $bbb_version ]; then
kernelVersion=$(ls /usr/lib/*/am335x-boneblack.dtb | head -1 | cut -d/ -f4)
else
kernelVersion=$(ls /usr/lib/*/am335x-boneblack-${1}.dtb | head -1 | cut -d/ -f4)
fi
version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
initRd=initrd.img-$version
vmlinuz=vmlinuz-$version
apt-get -yq install flash-kernel
bbb_loadaddr='0x82000000'
bbb_initrd_addr='0x88080000'
bbb_fdtaddr='0x88000000'
# 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=$initRd
loadaddr=$bbb_loadaddr
initrd_addr=$bbb_initrd_addr
fdtaddr=$bbb_fdtaddr
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
}
a20_env() {
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() {
bbb_version=$1
# 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"
bbb_dtb='am335x-boneblack'
if [ $bbb_version ]; then
bbb_dtb="am335x-boneblack-${bbb_version}"
fi
kernelVersion=$(ls /usr/lib/*/${bbb_dtb}.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/$kernelVersion/${bbb_dtb}.dtb dtb ; \
cat $vmlinuz dtb >> temp-kernel ; \
mkimage -A arm -O linux -T kernel -n "Debian kernel ${version}" \
-C none -a 0x82000000 -e 0x82000000 -d temp-kernel uImage ; \
rm -f temp-kernel ; \
mkimage -A arm -O linux -T ramdisk -C gzip -a 0x88080000 -e 0x88080000 \
-n "Debian ramdisk ${version}" \
-d $initRd uInitrd )
}
a20_setup_boot() {
dtb="$1"
# Setup boot.cmd
fstype=ext4
if grep -q btrfs /etc/fstab ; then
fstype=btrfs
fi
if [ -n "$command_line" ] ; then
echo flash-kernel flash-kernel/linux_cmdline string "$command_line" | debconf-set-selections
else
fstype=ext4
fi
kernelVersion=$(ls /usr/lib/*/$dtb | head -1 | cut -d/ -f4)
version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
@ -116,104 +206,37 @@ EOF
echo "rtc_sunxi" >> /etc/initramfs-tools/modules
}
beaglebone_env() {
bbb_version=$1
# Setup uEnv.txt
fstype=ext4
if grep -q btrfs /etc/fstab ; then
fstype=btrfs
fi
if [ ! $bbb_version ]; then
kernelVersion=$(ls /usr/lib/*/am335x-boneblack.dtb | head -1 | cut -d/ -f4)
else
kernelVersion=$(ls /usr/lib/*/am335x-boneblack-${1}.dtb | head -1 | cut -d/ -f4)
fi
version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
initRd=initrd.img-$version
vmlinuz=vmlinuz-$version
#bbb_loadaddr='0x80200000'
#bbb_initrd_addr='0x81000000'
#bbb_fdtaddr='0x80F80000'
#if [[ "$bbb_version" == "wireless" ]]; then
bbb_loadaddr='0x82000000'
bbb_initrd_addr='0x88080000'
bbb_fdtaddr='0x88000000'
#fi
# uEnv.txt for Beaglebone
# based on https://github.com/beagleboard/image-builder/blob/master/target/boot/beagleboard.org.txt
cat >> /boot/uEnv.txt <<EOF
mmcroot=/dev/mmcblk0p2 ro
mmcrootfstype=$fstype rootwait fixrtc
mmcrootflags=subvol=@
console=ttyO0,115200n8
kernel_file=$vmlinuz
initrd_file=$initRd
loadaddr=$bbb_loadaddr
initrd_addr=$bbb_initrd_addr
fdtaddr=$bbb_fdtaddr
initrd_high=0xffffffff
fdt_high=0xffffffff
loadkernel=load mmc \${mmcdev}:\${mmcpart} \${loadaddr} \${kernel_file}
loadinitrd=load mmc \${mmcdev}:\${mmcpart} \${initrd_addr} \${initrd_file}; setenv intrd_size \${filesize}
loadfdt=load mmc \${mmcdev}:\${mmcpart} \${fdtaddr} /dtbs/\${fdtfile}
loadfiles=run loadkernel; run loadinitrd; run loadfdt
mmcargs=setenv bootargs console=tty0 console=\${console} root=\${mmcroot} rootfstype=\${mmcrootfstype} rootflags=\${mmcrootflags}
uenvcmd=run loadfiles; run mmcargs; bootz \${loadaddr} \${initrd_addr}:\${initrd_size} \${fdtaddr}
EOF
mkdir -p /boot/dtbs
cp /usr/lib/linux-image-*-armmp/* /boot/dtbs
}
case "$MACHINE" in
beaglebone)
beaglebone_env
beaglebone_setup_boot
beaglebone_flash
beaglebone_repack_kernel
enable_serial_console ttyO0
setup_flash_kernel 'TI AM335x BeagleBone Black' 'ttyO0'
;;
beaglebonewifi)
beaglebone_env
beaglebone_setup_boot wireless
beaglebone_flash
beaglebone_repack_kernel wireless
enable_serial_console ttyO0
setup_flash_kernel 'TI AM335x BeagleBone Black Wireless' 'ttyO0'
;;
cubietruck)
a20_env sun7i-a20-cubietruck.dtb
enable_serial_console ttyO0
setup_flash_kernel 'Cubietech Cubietruck'
a20_setup_boot sun7i-a20-cubietruck.dtb
enable_serial_console ttyS0
;;
a20-olinuxino-lime)
a20_env sun7i-a20-olinuxino-lime.dtb
enable_serial_console ttyO0
setup_flash_kernel 'Olimex A20-OLinuXino-LIME'
a20_setup_boot sun7i-a20-olinuxino-lime.dtb
enable_serial_console ttyS0
;;
a20-olinuxino-lime2)
a20_env sun7i-a20-olinuxino-lime2.dtb
enable_serial_console ttyO0
setup_flash_kernel 'Olimex A20-OLinuXino-LIME2'
a20_setup_boot sun7i-a20-olinuxino-lime2.dtb
enable_serial_console ttyS0
;;
a20-olinuxino-micro)
a20_env sun7i-a20-olinuxino-micro.dtb
enable_serial_console ttyO0
setup_flash_kernel 'Olimex A20-Olinuxino Micro'
a20_setup_boot sun7i-a20-olinuxino-micro.dtb
enable_serial_console ttyS0
;;
cubieboard2)
a20_env sun7i-a20-cubieboard2.dtb
enable_serial_console ttyO0
setup_flash_kernel 'Cubietech Cubieboard2'
;;
pcduino3)
a20_env sun7i-a20-pcduino3.dtb
enable_serial_console ttyO0
setup_flash_kernel 'LinkSprite pcDuino3'
a20_setup_boot sun7i-a20-cubieboard2.dtb
enable_serial_console ttyS0
;;
esac