Repacking the beaglebone kernel
This commit is contained in:
Bob Mottram
parent
a73b4a02ab
commit
e02268012b
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@ -38,35 +38,125 @@ enable_serial_console() {
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echo "T0:12345:respawn:/sbin/getty -L $device 115200 vt100" >> /etc/inittab
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}
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setup_flash_kernel() {
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if [ ! -d /etc/flash-kernel ] ; then
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mkdir /etc/flash-kernel
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fi
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echo -n "$1" > /etc/flash-kernel/machine
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beaglebone_setup_boot() {
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bbb_version=$1
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command_line=""
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if [ -n "$2" ] ; then
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command_line="console=$2"
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# Setup uEnv.txt
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if grep -q btrfs /etc/fstab ; then
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fstype=btrfs
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else
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fstype=ext4
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fi
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if [ -n "$command_line" ] ; then
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echo flash-kernel flash-kernel/linux_cmdline string "$command_line" | debconf-set-selections
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if [ ! $bbb_version ]; then
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kernelVersion=$(ls /usr/lib/*/am335x-boneblack.dtb | head -1 | cut -d/ -f4)
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else
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kernelVersion=$(ls /usr/lib/*/am335x-boneblack-${1}.dtb | head -1 | cut -d/ -f4)
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fi
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version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
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initRd=initrd.img-$version
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vmlinuz=vmlinuz-$version
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apt-get -yq install flash-kernel
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bbb_loadaddr='0x82000000'
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bbb_initrd_addr='0x88080000'
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bbb_fdtaddr='0x88000000'
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# uEnv.txt for Beaglebone
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# based on https://github.com/beagleboard/image-builder/blob/master/target/boot/beagleboard.org.txt
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cat >> /boot/uEnv.txt <<EOF
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mmcroot=/dev/mmcblk0p2 ro
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mmcrootfstype=$fstype rootwait fixrtc
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mmcrootflags=subvol=@
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console=ttyO0,115200n8
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kernel_file=$vmlinuz
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initrd_file=$initRd
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loadaddr=$bbb_loadaddr
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initrd_addr=$bbb_initrd_addr
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fdtaddr=$bbb_fdtaddr
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initrd_high=0xffffffff
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fdt_high=0xffffffff
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loadkernel=load mmc \${mmcdev}:\${mmcpart} \${loadaddr} \${kernel_file}
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loadinitrd=load mmc \${mmcdev}:\${mmcpart} \${initrd_addr} \${initrd_file}; setenv initrd_size \${filesize}
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loadfdt=load mmc \${mmcdev}:\${mmcpart} \${fdtaddr} /dtbs/\${fdtfile}
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loadfiles=run loadkernel; run loadinitrd; run loadfdt
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mmcargs=setenv bootargs console=tty0 console=\${console} root=\${mmcroot} rootfstype=\${mmcrootfstype} rootflags=\${mmcrootflags}
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uenvcmd=run loadfiles; run mmcargs; bootz \${loadaddr} \${initrd_addr}:\${initrd_size} \${fdtaddr}
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EOF
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mkdir -p /boot/dtbs
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cp /usr/lib/linux-image-*-armmp/* /boot/dtbs
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}
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a20_env() {
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beaglebone_flash() {
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# allow flash-kernel to work without valid /proc contents
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# ** this doesn't *really* work, since there are too many checks
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# that fail in an emulated environment! We'll have to do it by
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# hand below anyway...
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export FK_MACHINE="TI AM335x BeagleBone"
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apt-get install -y flash-kernel
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}
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beaglebone_repack_kernel() {
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bbb_version=$1
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# process installed kernel to create uImage, uInitrd, dtb
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# using flash-kernel would be a good approach, except it fails in the
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# cross build environment due to too many environment checks...
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#FK_MACHINE="TI AM335x BeagleBone" flash-kernel
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# so, let's do it manually...
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# flash-kernel's hook-functions provided to mkinitramfs have the
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# unfortunate side-effect of creating /conf/param.conf in the initrd
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# when run from our emulated chroot environment, which means our root=
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# on the kernel command line is completely ignored! repack the initrd
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# to remove this evil...
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echo "info: repacking beaglebone kernel and initrd"
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bbb_dtb='am335x-boneblack'
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if [ $bbb_version ]; then
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bbb_dtb="am335x-boneblack-${bbb_version}"
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fi
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kernelVersion=$(ls /usr/lib/*/${bbb_dtb}.dtb | head -1 | cut -d/ -f4)
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version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
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initRd=initrd.img-$version
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vmlinuz=vmlinuz-$version
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mkdir /tmp/initrd-repack
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(cd /tmp/initrd-repack ; \
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zcat /boot/$initRd | cpio -i ; \
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rm -f conf/param.conf ; \
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find . | cpio --quiet -o -H newc | \
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gzip -9 > /boot/$initRd )
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rm -rf /tmp/initrd-repack
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(cd /boot ; \
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cp /usr/lib/$kernelVersion/${bbb_dtb}.dtb dtb ; \
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cat $vmlinuz dtb >> temp-kernel ; \
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mkimage -A arm -O linux -T kernel -n "Debian kernel ${version}" \
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-C none -a 0x82000000 -e 0x82000000 -d temp-kernel uImage ; \
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rm -f temp-kernel ; \
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mkimage -A arm -O linux -T ramdisk -C gzip -a 0x88080000 -e 0x88080000 \
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-n "Debian ramdisk ${version}" \
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-d $initRd uInitrd )
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}
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a20_setup_boot() {
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dtb="$1"
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# Setup boot.cmd
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fstype=ext4
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if grep -q btrfs /etc/fstab; then
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if grep -q btrfs /etc/fstab ; then
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fstype=btrfs
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fi
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if [ -n "$command_line" ] ; then
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echo flash-kernel flash-kernel/linux_cmdline string "$command_line" | debconf-set-selections
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else
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fstype=ext4
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fi
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kernelVersion=$(ls /usr/lib/*/$dtb | head -1 | cut -d/ -f4)
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version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
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@ -116,104 +206,37 @@ EOF
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echo "rtc_sunxi" >> /etc/initramfs-tools/modules
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}
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beaglebone_env() {
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bbb_version=$1
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# Setup uEnv.txt
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fstype=ext4
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if grep -q btrfs /etc/fstab ; then
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fstype=btrfs
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fi
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if [ ! $bbb_version ]; then
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kernelVersion=$(ls /usr/lib/*/am335x-boneblack.dtb | head -1 | cut -d/ -f4)
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else
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kernelVersion=$(ls /usr/lib/*/am335x-boneblack-${1}.dtb | head -1 | cut -d/ -f4)
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fi
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version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
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initRd=initrd.img-$version
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vmlinuz=vmlinuz-$version
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#bbb_loadaddr='0x80200000'
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#bbb_initrd_addr='0x81000000'
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#bbb_fdtaddr='0x80F80000'
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#if [[ "$bbb_version" == "wireless" ]]; then
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bbb_loadaddr='0x82000000'
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bbb_initrd_addr='0x88080000'
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bbb_fdtaddr='0x88000000'
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#fi
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# uEnv.txt for Beaglebone
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# based on https://github.com/beagleboard/image-builder/blob/master/target/boot/beagleboard.org.txt
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cat >> /boot/uEnv.txt <<EOF
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mmcroot=/dev/mmcblk0p2 ro
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mmcrootfstype=$fstype rootwait fixrtc
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mmcrootflags=subvol=@
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console=ttyO0,115200n8
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kernel_file=$vmlinuz
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initrd_file=$initRd
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loadaddr=$bbb_loadaddr
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initrd_addr=$bbb_initrd_addr
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fdtaddr=$bbb_fdtaddr
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initrd_high=0xffffffff
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fdt_high=0xffffffff
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loadkernel=load mmc \${mmcdev}:\${mmcpart} \${loadaddr} \${kernel_file}
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loadinitrd=load mmc \${mmcdev}:\${mmcpart} \${initrd_addr} \${initrd_file}; setenv intrd_size \${filesize}
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loadfdt=load mmc \${mmcdev}:\${mmcpart} \${fdtaddr} /dtbs/\${fdtfile}
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loadfiles=run loadkernel; run loadinitrd; run loadfdt
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mmcargs=setenv bootargs console=tty0 console=\${console} root=\${mmcroot} rootfstype=\${mmcrootfstype} rootflags=\${mmcrootflags}
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uenvcmd=run loadfiles; run mmcargs; bootz \${loadaddr} \${initrd_addr}:\${initrd_size} \${fdtaddr}
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EOF
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mkdir -p /boot/dtbs
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cp /usr/lib/linux-image-*-armmp/* /boot/dtbs
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}
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case "$MACHINE" in
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beaglebone)
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beaglebone_env
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beaglebone_setup_boot
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beaglebone_flash
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beaglebone_repack_kernel
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enable_serial_console ttyO0
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setup_flash_kernel 'TI AM335x BeagleBone Black' 'ttyO0'
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;;
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beaglebonewifi)
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beaglebone_env
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beaglebone_setup_boot wireless
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beaglebone_flash
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beaglebone_repack_kernel wireless
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enable_serial_console ttyO0
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setup_flash_kernel 'TI AM335x BeagleBone Black Wireless' 'ttyO0'
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;;
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cubietruck)
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a20_env sun7i-a20-cubietruck.dtb
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enable_serial_console ttyO0
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setup_flash_kernel 'Cubietech Cubietruck'
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a20_setup_boot sun7i-a20-cubietruck.dtb
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enable_serial_console ttyS0
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;;
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a20-olinuxino-lime)
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a20_env sun7i-a20-olinuxino-lime.dtb
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enable_serial_console ttyO0
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setup_flash_kernel 'Olimex A20-OLinuXino-LIME'
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a20_setup_boot sun7i-a20-olinuxino-lime.dtb
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enable_serial_console ttyS0
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;;
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a20-olinuxino-lime2)
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a20_env sun7i-a20-olinuxino-lime2.dtb
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enable_serial_console ttyO0
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setup_flash_kernel 'Olimex A20-OLinuXino-LIME2'
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a20_setup_boot sun7i-a20-olinuxino-lime2.dtb
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enable_serial_console ttyS0
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;;
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a20-olinuxino-micro)
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a20_env sun7i-a20-olinuxino-micro.dtb
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enable_serial_console ttyO0
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setup_flash_kernel 'Olimex A20-Olinuxino Micro'
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a20_setup_boot sun7i-a20-olinuxino-micro.dtb
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enable_serial_console ttyS0
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;;
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cubieboard2)
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a20_env sun7i-a20-cubieboard2.dtb
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enable_serial_console ttyO0
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setup_flash_kernel 'Cubietech Cubieboard2'
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;;
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pcduino3)
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a20_env sun7i-a20-pcduino3.dtb
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enable_serial_console ttyO0
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setup_flash_kernel 'LinkSprite pcDuino3'
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a20_setup_boot sun7i-a20-cubieboard2.dtb
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enable_serial_console ttyS0
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;;
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esac
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