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# Toradex kernel-fitimage.bbclass extension
#
# This bbclass extends OE's kernel-fitimage.bbclass by overridding
# some functions according to Toradex specific requirements.
#
# Copyright 2021 (C) Toradex AG
inherit kernel-fitimage
FIT_SUPPORTED_INITRAMFS_FSTYPES ?= "cpio.lz4 cpio.lzo cpio.lzma cpio.xz cpio.zst cpio.gz ext2.gz cpio squashfs"
#
# Override fitimage_assemble in kernel-fitimage.bbclass
#
# To support devicetree overlays, we need handle both
# ${KERNEL_DEVICETREE} and ${EXTERNAL_KERNEL_DEVICETREE} at
# meanwhile.
#
# Assemble fitImage
#
# $1 ... .its filename
# $2 ... fitImage name
# $3 ... include ramdisk
fitimage_assemble() {
kernelcount=1
dtbcount=""
DTBS=""
ramdiskcount=${3}
setupcount=""
rm -f ${1} arch/${ARCH}/boot/${2}
fitimage_emit_fit_header ${1}
#
# Step 1: Prepare a kernel image section.
#
fitimage_emit_section_maint ${1} imagestart
uboot_prep_kimage
fitimage_emit_section_kernel ${1} "${kernelcount}" linux.bin "${linux_comp}"
if [ "x${UBOOT_KERNEL_TYPE}" = "xkernel_noload" ]; then
sed 's/\(^\s*type.*\kernel\)\"/\1_noload\"/' -i ${1}
fi
#
# Step 2: Prepare a DTB image section
#
if [ -n "${KERNEL_DEVICETREE}" ]; then
dtbcount=1
for DTB in ${KERNEL_DEVICETREE}; do
if echo ${DTB} | grep -q '/dts/'; then
bbwarn "${DTB} contains the full path to the the dts file, but only the dtb name should be used."
DTB=`basename ${DTB} | sed 's,\.dts$,.dtb,g'`
fi
DTB_PATH="arch/${ARCH}/boot/dts/${DTB}"
if [ ! -e "${DTB_PATH}" ]; then
DTB_PATH="arch/${ARCH}/boot/${DTB}"
fi
DTB=$(echo "$(basename ${DTB})" | tr '/' '_')
DTBS="${DTBS} ${DTB}"
fitimage_emit_section_dtb ${1} ${DTB} ${DTB_PATH}
done
fi
if [ -n "${EXTERNAL_KERNEL_DEVICETREE}" ]; then
dtbcount=1
for DTB in $(find "${EXTERNAL_KERNEL_DEVICETREE}" \( -name '*.dtb' -o -name '*.dtbo' \) -printf '%P\n' | sort); do
DTB=$(echo "${DTB}" | tr '/' '_')
DTBS="${DTBS} ${DTB}"
fitimage_emit_section_dtb ${1} ${DTB} "${EXTERNAL_KERNEL_DEVICETREE}/${DTB}"
done
fi
#
# Step 3: Prepare a setup section. (For x86)
#
if [ -e arch/${ARCH}/boot/setup.bin ]; then
setupcount=1
fitimage_emit_section_setup ${1} "${setupcount}" arch/${ARCH}/boot/setup.bin
fi
#
# Step 4: Prepare a ramdisk section.
#
if [ "x${ramdiskcount}" = "x1" ] ; then
# Find and use the first initramfs image archive type we find
found=
for img in ${FIT_SUPPORTED_INITRAMFS_FSTYPES}; do
initramfs_path="${DEPLOY_DIR_IMAGE}/${INITRAMFS_IMAGE_NAME}.${img}"
echo "Using $initramfs_path"
if [ -e "${initramfs_path}" ]; then
found=true
fitimage_emit_section_ramdisk ${1} "${ramdiskcount}" "${initramfs_path}"
break
fi
done
if [ -z "$found" ]; then
bbfatal "Could not find a valid initramfs type for ${INITRAMFS_IMAGE_NAME}, the supported types are: ${FIT_SUPPORTED_INITRAMFS_FSTYPES}"
fi
fi
fitimage_emit_section_maint ${1} sectend
# Force the first Kernel and DTB in the default config
kernelcount=1
if [ -n "${dtbcount}" ]; then
dtbcount=1
fi
#
# Step 5: Prepare a configurations section
#
fitimage_emit_section_maint ${1} confstart
if [ -n "${DTBS}" ]; then
i=1
for DTB in ${DTBS}; do
dtb_ext=${DTB##*.}
if [ "${dtb_ext}" = "dtbo" ]; then
fitimage_emit_section_config ${1} "" "${DTB}" "" "" "`expr ${i} = ${dtbcount}`"
else
fitimage_emit_section_config ${1} "${kernelcount}" "${DTB}" "${ramdiskcount}" "${setupcount}" "`expr ${i} = ${dtbcount}`"
fi
i=`expr ${i} + 1`
done
else
defaultconfigcount=1
fitimage_emit_section_config ${1} "${kernelcount}" "" "${ramdiskcount}" "${setupcount}" "${defaultconfigcount}"
fi
fitimage_emit_section_maint ${1} sectend
fitimage_emit_section_maint ${1} fitend
#
# Step 6: Assemble the image
#
uboot-mkimage \
${@'-D "${UBOOT_MKIMAGE_DTCOPTS}"' if len('${UBOOT_MKIMAGE_DTCOPTS}') else ''} \
-f ${1} \
arch/${ARCH}/boot/${2}
#
# Step 7: Sign the image and add public key to U-Boot dtb
#
if [ "x${UBOOT_SIGN_ENABLE}" = "x1" ] ; then
add_key_to_u_boot=""
if [ -n "${UBOOT_DTB_BINARY}" ]; then
# The u-boot.dtb is a symlink to UBOOT_DTB_IMAGE, so we need copy
# both of them, and don't dereference the symlink.
cp -P ${STAGING_DATADIR}/u-boot*.dtb ${B}
add_key_to_u_boot="-K ${B}/${UBOOT_DTB_BINARY}"
fi
uboot-mkimage \
${@'-D "${UBOOT_MKIMAGE_DTCOPTS}"' if len('${UBOOT_MKIMAGE_DTCOPTS}') else ''} \
-F -k "${UBOOT_SIGN_KEYDIR}" \
$add_key_to_u_boot \
-r arch/${ARCH}/boot/${2}
fi
}
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