RPI4-installkernel.sh/installkernel at main · foxhlchen/RPI4-installkernel.sh · GitHub

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# RPI4 Manjaro installkernel script
# Fox Chen <foxhlchen@gmail.com>
#
# Setup:
#   copy /boot/config.txt to /boot/config.txt.origin
#   copy this script to /sbin/installkernel
#
# Usage:
#   git clone <mainline kernel src code>
#   cd <mainline kernel src code folder>
#   make defconfig
#   sudo make modules_install install
#
# Arguments:
#   $1 - kernel version
#   $2 - kernel image file
#   $3 - kernel map file
#   $4 - default install path (blank if root directory)
#

echo '>>> Copy the kernel image <<<' &&
cp -v $2 $4/vmlinuz-linux-$1 &&

echo '>>> Create initramfs image <<<' &&
mkinitcpio -k $1 -c /etc/mkinitcpio.conf -g $4/initramfs-linux-$1.img &&

echo '>>> Update dtb <<<' &&
cp -v arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b.dtb /boot/ &&

echo '>>> Update config.txt <<<' &&
cp -vf /boot/config.txt.origin /boot/config.txt.tmp &&
sed -i "s/initramfs-linux.img/initramfs-linux-$1.img/g" /boot/config.txt.tmp &&
sed -i "s/kernel8.img/vmlinuz-linux-$1/g" /boot/config.txt.tmp &&
mv -vf /boot/config.txt.tmp /boot/config.txt