Script to create boot.img for xiaomi-lavender from inside kernel build tree, using initramfs file built by pmbootstrap

create-bootimg.sh

#!/bin/bash

set -x

KERNEL=./arch/arm64/boot/Image.gz
KERNEL_DTB=${KERNEL}-dtb
DTB=./arch/arm64/boot/dts/qcom/sdm660-xiaomi-lavender.dtb
INITRD=initramfs-postmarketos-qcom-sdm660

# Optional:
#  Build kernel with:
#   make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- O=build -j12 -C ../
# You should have cross-compiler installed before that.
# CROSS_COMPILE may be "aarch64-unknown-linux-gnu-" or "aarch64-linux-gnu-"
# depending on your Linux distribution.

source ~/.local/var/pmbootstrap/cache_git/pmaports/device/device-xiaomi-lavender/deviceinfo

cp -i ~/.local/var/pmbootstrap/chroot_rootfs_xiaomi-lavender/boot/initramfs-postmarketos-qcom-sdm660 .

# append DTB to gzipped kernel image
cat ${KERNEL} ${DTB} > ${KERNEL_DTB}

mkbootimg \
        --kernel "${KERNEL_DTB}" \
        --ramdisk "${INITRD}" \
        --base "${deviceinfo_flash_offset_base}" \
        --second_offset "${deviceinfo_flash_offset_second}" \
        --cmdline "${deviceinfo_kernel_cmdline_mainline}" \
        --kernel_offset "${deviceinfo_flash_offset_kernel}" \
        --ramdisk_offset "${deviceinfo_flash_offset_ramdisk}" \
        --tags_offset "${deviceinfo_flash_offset_tags}" \
        --pagesize "${deviceinfo_flash_pagesize}" \
        -o boot-xiaomi-lavender-mainline.img