|
|
#
|
|
|
# Build and Setup RPi2 Kernel
|
|
|
#
|
|
|
|
|
|
# Load utility functions
|
|
|
. ./functions.sh
|
|
|
|
|
|
# Fetch and build latest raspberry kernel
|
|
|
if [ "$BUILD_KERNEL" = true ] ; then
|
|
|
# Setup source directory
|
|
|
mkdir -p $R/usr/src
|
|
|
|
|
|
# Copy existing kernel sources into chroot directory
|
|
|
if [ -n "$KERNEL_SRCDIR" ] && [ -d "$KERNEL_SRCDIR" ] ; then
|
|
|
# Copy kernel sources
|
|
|
cp -r "${KERNEL_SRCDIR}" "${R}/usr/src"
|
|
|
|
|
|
# Clean the kernel sources
|
|
|
if [ "$KERNEL_CLEANSRC" = true ] ; then
|
|
|
make -C $R/usr/src/linux ARCH=${KERNEL_ARCH} CROSS_COMPILE=${CROSS_COMPILE} mrproper
|
|
|
fi
|
|
|
else # KERNEL_SRCDIR=""
|
|
|
# Fetch current raspberrypi kernel sources
|
|
|
git -C $R/usr/src clone --depth=1 https://github.com/raspberrypi/linux
|
|
|
fi
|
|
|
|
|
|
# Calculate optimal number of kernel building threads
|
|
|
if [ "$KERNEL_THREADS" = "1" ] ; then
|
|
|
if [ -r /proc/cpuinfo ] ; then
|
|
|
KERNEL_THREADS=$(grep -c processor /proc/cpuinfo)
|
|
|
fi
|
|
|
fi
|
|
|
|
|
|
if [ "$KERNEL_CONFIGSRC" = true ] ; then
|
|
|
# Load default raspberry kernel configuration
|
|
|
make -C $R/usr/src/linux ARCH=${KERNEL_ARCH} CROSS_COMPILE=${CROSS_COMPILE} ${KERNEL_DEFCONFIG}
|
|
|
|
|
|
# Start menu-driven kernel configuration (interactive)
|
|
|
if [ "$KERNEL_MENUCONFIG" = true ] ; then
|
|
|
make -C $R/usr/src/linux ARCH=${KERNEL_ARCH} CROSS_COMPILE=${CROSS_COMPILE} menuconfig
|
|
|
fi
|
|
|
fi
|
|
|
|
|
|
# Cross compile kernel and modules
|
|
|
make -C $R/usr/src/linux -j${KERNEL_THREADS} ARCH=${KERNEL_ARCH} CROSS_COMPILE=${CROSS_COMPILE} zImage modules dtbs
|
|
|
|
|
|
# Check if kernel compilation was successful
|
|
|
if [ ! -r $R/usr/src/linux/arch/${KERNEL_ARCH}/boot/zImage ] ; then
|
|
|
echo "error: kernel compilation failed!"
|
|
|
cleanup
|
|
|
exit 1
|
|
|
fi
|
|
|
|
|
|
# Install kernel modules
|
|
|
if [ "$ENABLE_REDUCE" = true ] ; then
|
|
|
make -C $R/usr/src/linux ARCH=${KERNEL_ARCH} CROSS_COMPILE=${CROSS_COMPILE} INSTALL_MOD_STRIP=1 INSTALL_MOD_PATH=../../.. modules_install
|
|
|
else
|
|
|
make -C $R/usr/src/linux ARCH=${KERNEL_ARCH} CROSS_COMPILE=${CROSS_COMPILE} INSTALL_MOD_PATH=../../.. modules_install
|
|
|
fi
|
|
|
|
|
|
# Install kernel headers
|
|
|
if [ "$KERNEL_HEADERS" = true ] ; then
|
|
|
make -C $R/usr/src/linux ARCH=${KERNEL_ARCH} CROSS_COMPILE=${CROSS_COMPILE} INSTALL_HDR_PATH=../.. headers_install
|
|
|
fi
|
|
|
|
|
|
# Copy and rename compiled kernel to boot directory
|
|
|
mkdir $R/boot/firmware/
|
|
|
$R/usr/src/linux/scripts/mkknlimg $R/usr/src/linux/arch/${KERNEL_ARCH}/boot/zImage $R/boot/firmware/kernel7.img
|
|
|
|
|
|
# Copy dts and dtb device definitions
|
|
|
mkdir $R/boot/firmware/overlays/
|
|
|
cp $R/usr/src/linux/arch/${KERNEL_ARCH}/boot/dts/*.dtb $R/boot/firmware/
|
|
|
cp $R/usr/src/linux/arch/${KERNEL_ARCH}/boot/dts/overlays/*.dtb* $R/boot/firmware/overlays/
|
|
|
cp $R/usr/src/linux/arch/${KERNEL_ARCH}/boot/dts/overlays/README $R/boot/firmware/overlays/
|
|
|
|
|
|
# Remove kernel sources
|
|
|
if [ "$KERNEL_RMSRC" = true ] ; then
|
|
|
rm -fr $R/usr/src/linux
|
|
|
fi
|
|
|
|
|
|
# Install raspberry bootloader and flash-kernel packages
|
|
|
chroot_exec apt-get -qq -y --no-install-recommends install raspberrypi-bootloader-nokernel
|
|
|
else # BUILD_KERNEL=false
|
|
|
# Kernel installation
|
|
|
chroot_exec apt-get -qq -y --no-install-recommends install linux-image-${COLLABORA_KERNEL} raspberrypi-bootloader-nokernel
|
|
|
|
|
|
# Install flash-kernel last so it doesn't try (and fail) to detect the platform in the chroot
|
|
|
chroot_exec apt-get -qq -y install flash-kernel
|
|
|
|
|
|
VMLINUZ="$(ls -1 $R/boot/vmlinuz-* | sort | tail -n 1)"
|
|
|
[ -z "$VMLINUZ" ] && exit 1
|
|
|
cp $VMLINUZ $R/boot/firmware/kernel7.img
|
|
|
fi
|
|
|
|
|
|
# Setup firmware boot cmdline
|
|
|
if [ "$ENABLE_SPLITFS" = true ] ; then
|
|
|
CMDLINE="dwc_otg.lpm_enable=0 root=/dev/sda1 rootfstype=ext4 rootflags=commit=100,data=writeback elevator=deadline rootwait net.ifnames=1 console=tty1 ${CMDLINE}"
|
|
|
else
|
|
|
CMDLINE="dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 rootfstype=ext4 rootflags=commit=100,data=writeback elevator=deadline rootwait net.ifnames=1 console=tty1 ${CMDLINE}"
|
|
|
fi
|
|
|
|
|
|
# Add serial console support
|
|
|
if [ "$ENABLE_CONSOLE" = true ] ; then
|
|
|
CMDLINE="${CMDLINE} console=ttyAMA0,115200 kgdboc=ttyAMA0,115200"
|
|
|
fi
|
|
|
|
|
|
# Remove IPv6 networking support
|
|
|
if [ "$ENABLE_IPV6" = false ] ; then
|
|
|
CMDLINE="${CMDLINE} ipv6.disable=1"
|
|
|
fi
|
|
|
|
|
|
# Install firmware boot cmdline
|
|
|
echo "${CMDLINE}" >$R/boot/firmware/cmdline.txt
|
|
|
|
|
|
# Install firmware config
|
|
|
install_readonly files/boot/config.txt $R/boot/firmware/config.txt
|
|
|
|
|
|
# Setup minimal GPU memory allocation size: 16MB (no X)
|
|
|
if [ "$ENABLE_MINGPU" = true ] ; then
|
|
|
echo "gpu_mem=16" >>$R/boot/firmware/config.txt
|
|
|
fi
|
|
|
|
|
|
# Create firmware configuration and cmdline symlinks
|
|
|
ln -sf firmware/config.txt $R/boot/config.txt
|
|
|
ln -sf firmware/cmdline.txt $R/boot/cmdline.txt
|
|
|
|
|
|
# Install and setup kernel modules to load at boot
|
|
|
mkdir -p $R/lib/modules-load.d/
|
|
|
install_readonly files/modules/rpi2.conf $R/lib/modules-load.d/rpi2.conf
|
|
|
|
|
|
# Load hardware random module at boot
|
|
|
if [ "$ENABLE_HWRANDOM" = true ] ; then
|
|
|
sed -i "s/^# bcm2708_rng/bcm2708_rng/" $R/lib/modules-load.d/rpi2.conf
|
|
|
fi
|
|
|
|
|
|
# Load sound module at boot
|
|
|
if [ "$ENABLE_SOUND" = true ] ; then
|
|
|
sed -i "s/^# snd_bcm2835/snd_bcm2835/" $R/lib/modules-load.d/rpi2.conf
|
|
|
fi
|
|
|
|
|
|
# Install kernel modules blacklist
|
|
|
mkdir -p $R/etc/modprobe.d/
|
|
|
install_readonly files/modules/raspi-blacklist.conf $R/etc/modprobe.d/raspi-blacklist.conf
|
|
|
|
|
|
# Install and setup fstab
|
|
|
install_readonly files/mount/fstab $R/etc/fstab
|
|
|
if [ "$ENABLE_SPLITFS" = true ] ; then
|
|
|
sed -i 's/mmcblk0p2/sda1/' $R/etc/fstab
|
|
|
fi
|
|
|
|
|
|
# Install sysctl.d configuration files
|
|
|
install_readonly files/sysctl.d/81-rpi-vm.conf $R/etc/sysctl.d/81-rpi-vm.conf
|
|
|
|