From: Denys Dmytriyenko <[email protected]>

Base fitimage support comes from OE-Core/master with initramfs support added
from WIP patches on the mailing list. Fixes, customizations and TI secure boot
support were added on top. Requires additional cleanup and careful upstreaming.

Signed-off-by: Denys Dmytriyenko <[email protected]>
---
v2 - improved image deployment and handling

 meta-arago-distro/classes/kernel-fitimage.bbclass | 517 ++++++++++++++++++++++
 meta-arago-distro/classes/uboot-sign.bbclass      |  95 ++++
 meta-arago-distro/conf/distro/arago.conf          |  17 +
 3 files changed, 629 insertions(+)
 create mode 100644 meta-arago-distro/classes/kernel-fitimage.bbclass
 create mode 100644 meta-arago-distro/classes/uboot-sign.bbclass

diff --git a/meta-arago-distro/classes/kernel-fitimage.bbclass 
b/meta-arago-distro/classes/kernel-fitimage.bbclass
new file mode 100644
index 0000000..a294fa0
--- /dev/null
+++ b/meta-arago-distro/classes/kernel-fitimage.bbclass
@@ -0,0 +1,517 @@
+inherit kernel-uboot uboot-sign
+
+FITIMAGE_HASH_ALGO ?= "sha1"
+FITIMAGE_DTB_BY_NAME ?= "0"
+
+XZ_COMPRESSION_LEVEL ?= "-e -6"
+XZ_INTEGRITY_CHECK ?= "crc32"
+XZ_THREADS ?= "-T 0"
+
+python __anonymous () {
+    kerneltypes = d.getVar('KERNEL_IMAGETYPES', True) or ""
+    if 'fitImage' in kerneltypes.split():
+        depends = d.getVar("DEPENDS", True)
+        depends = "%s u-boot-mkimage-native dtc-native" % depends
+        d.setVar("DEPENDS", depends)
+
+        if d.getVar("UBOOT_ARCH", True) == "x86":
+            replacementtype = "bzImage"
+        else:
+            replacementtype = "zImage"
+
+       # Override KERNEL_IMAGETYPE_FOR_MAKE variable, which is internal
+       # to kernel.bbclass . We have to override it, since we pack zImage
+       # (at least for now) into the fitImage .
+        typeformake = d.getVar("KERNEL_IMAGETYPE_FOR_MAKE", True) or ""
+        if 'fitImage' in typeformake.split():
+            d.setVar('KERNEL_IMAGETYPE_FOR_MAKE', 
typeformake.replace('fitImage', replacementtype))
+
+        image = d.getVar('INITRAMFS_IMAGE', True)
+        if image:
+            d.appendVarFlag('do_assemble_fitimage_initramfs', 'depends', ' 
${INITRAMFS_IMAGE}:do_image_complete')
+
+        # Verified boot will sign the fitImage and append the public key to
+        # U-boot dtb. We ensure the U-Boot dtb is deployed before assembling
+        # the fitImage:
+        if d.getVar('UBOOT_SIGN_ENABLE', True):
+            uboot_pn = d.getVar('PREFERRED_PROVIDER_u-boot', True) or 'u-boot'
+            d.appendVarFlag('do_assemble_fitimage', 'depends', ' %s:do_deploy' 
% uboot_pn)
+}
+
+# Options for the device tree compiler passed to mkimage '-D' feature:
+UBOOT_MKIMAGE_DTCOPTS ??= ""
+
+fitimage_ti_secure() {
+       if test -n "${TI_SECURE_DEV_PKG}"; then
+               export TI_SECURE_DEV_PKG=${TI_SECURE_DEV_PKG}
+               ${TI_SECURE_DEV_PKG}/scripts/secure-binary-image.sh $1 $2
+       else
+               cp $1 $2
+       fi
+}
+
+#
+# Emit the fitImage ITS header
+#
+# $1 ... .its filename
+fitimage_emit_fit_header() {
+       cat << EOF >> ${1}
+/dts-v1/;
+
+/ {
+        description = "U-Boot fitImage for ${DISTRO_NAME}/${PV}/${MACHINE}";
+        #address-cells = <1>;
+EOF
+}
+
+#
+# Emit the fitImage section bits
+#
+# $1 ... .its filename
+# $2 ... Section bit type: imagestart - image section start
+#                          confstart  - configuration section start
+#                          sectend    - section end
+#                          fitend     - fitimage end
+#
+fitimage_emit_section_maint() {
+       case $2 in
+       imagestart)
+               cat << EOF >> ${1}
+
+        images {
+EOF
+       ;;
+       confstart)
+               cat << EOF >> ${1}
+
+        configurations {
+EOF
+       ;;
+       sectend)
+               cat << EOF >> ${1}
+       };
+EOF
+       ;;
+       fitend)
+               cat << EOF >> ${1}
+};
+EOF
+       ;;
+       esac
+}
+
+#
+# Emit the fitImage ITS kernel section
+#
+# $1 ... .its filename
+# $2 ... Image counter
+# $3 ... Path to kernel image
+# $4 ... Compression type
+fitimage_emit_section_kernel() {
+
+       kernel_csum=${FITIMAGE_HASH_ALGO}
+
+       ENTRYPOINT=${UBOOT_ENTRYPOINT}
+       if test -n "${UBOOT_ENTRYSYMBOL}"; then
+               ENTRYPOINT=`${HOST_PREFIX}nm ${S}/vmlinux | \
+                       awk '$4=="${UBOOT_ENTRYSYMBOL}" {print $2}'`
+       fi
+
+       cat << EOF >> ${1}
+                kernel@${2} {
+                        description = "Linux kernel";
+                        data = /incbin/("${3}");
+                        type = "kernel";
+                        arch = "${UBOOT_ARCH}";
+                        os = "linux";
+                        compression = "${4}";
+                        load = <${UBOOT_LOADADDRESS}>;
+                        entry = <${ENTRYPOINT}>;
+EOF
+       if test -n "${FITIMAGE_HASH_ALGO}"; then
+               cat << EOF >> ${1}
+                        hash@1 {
+                                algo = "${kernel_csum}";
+                        };
+EOF
+       fi
+       cat << EOF >> ${1}
+                };
+EOF
+}
+
+#
+# Emit the fitImage ITS DTB section
+#
+# $1 ... .its filename
+# $2 ... Image counter/name
+# $3 ... Path to DTB image
+fitimage_emit_section_dtb() {
+
+       dtb_csum=${FITIMAGE_HASH_ALGO}
+
+       cat << EOF >> ${1}
+                ${2} {
+                        description = "Flattened Device Tree blob";
+                        data = /incbin/("${3}");
+                        type = "flat_dt";
+                        arch = "${UBOOT_ARCH}";
+                        compression = "none";
+EOF
+       if test -n "${FITIMAGE_HASH_ALGO}"; then
+               cat << EOF >> ${1}
+                        hash@1 {
+                                algo = "${dtb_csum}";
+                        };
+EOF
+       fi
+       cat << EOF >> ${1}
+                };
+EOF
+}
+
+#
+# Emit the fitImage ITS setup section
+#
+# $1 ... .its filename
+# $2 ... Image counter
+# $3 ... Path to setup image
+fitimage_emit_section_setup() {
+
+       setup_csum=${FITIMAGE_HASH_ALGO}
+
+       cat << EOF >> ${1}
+                setup@${2} {
+                        description = "Linux setup.bin";
+                        data = /incbin/("${3}");
+                        type = "x86_setup";
+                        arch = "${UBOOT_ARCH}";
+                        os = "linux";
+                        compression = "none";
+                        load = <0x00090000>;
+                        entry = <0x00090000>;
+EOF
+       if test -n "${FITIMAGE_HASH_ALGO}"; then
+               cat << EOF >> ${1}
+                        hash@1 {
+                                algo = "${setup_csum}";
+                        };
+EOF
+       fi
+       cat << EOF >> ${1}
+                };
+EOF
+}
+
+#
+# Emit the fitImage ITS ramdisk section
+#
+# $1 ... .its filename
+# $2 ... Image counter
+# $3 ... Path to ramdisk image
+fitimage_emit_section_ramdisk() {
+
+       ramdisk_csum=${FITIMAGE_HASH_ALGO}
+
+       cat << EOF >> ${1}
+                ramdisk@${2} {
+                        description = "ramdisk image";
+                        data = /incbin/("${3}");
+                        type = "ramdisk";
+                        arch = "${UBOOT_ARCH}";
+                        os = "linux";
+                        compression = "none";
+EOF
+       if test -n "${UBOOT_RD_LOADADDRESS}"; then
+               cat << EOF >> ${1}
+                        load = <${UBOOT_RD_LOADADDRESS}>;
+EOF
+       fi
+
+       if test -n "${UBOOT_RD_ENTRYPOINT}"; then
+               cat << EOF >> ${1}
+                        entry = <${UBOOT_RD_ENTRYPOINT}>;
+EOF
+       fi
+
+       if test -n "${FITIMAGE_HASH_ALGO}"; then
+               cat << EOF >> ${1}
+                        hash@1 {
+                                algo = "${ramdisk_csum}";
+                        };
+EOF
+       fi
+       cat << EOF >> ${1}
+                };
+EOF
+}
+
+#
+# Emit the fitImage ITS configuration section
+#
+# $1 ... .its filename
+# $2 ... Linux kernel ID
+# $3 ... DTB image ID/name
+# $4 ... ramdisk ID
+# $5 ... config ID
+fitimage_emit_section_config() {
+
+       conf_csum=${FITIMAGE_HASH_ALGO}
+       if [ -n "${UBOOT_SIGN_ENABLE}" ] ; then
+               conf_sign_keyname="${UBOOT_SIGN_KEYNAME}"
+       fi
+
+       # Test if we have any DTBs at all
+       conf_desc="Linux kernel"
+       kernel_line="kernel = \"kernel@${2}\";"
+       fdt_line=""
+       ramdisk_line=""
+
+       if [ -n "${3}" ]; then
+               conf_desc="${conf_desc}, FDT blob"
+               fdt_line="fdt = \"${3}\";"
+       fi
+
+       if [ -n "${4}" ]; then
+               conf_desc="${conf_desc}, ramdisk"
+               ramdisk_line="ramdisk = \"ramdisk@${4}\";"
+       fi
+
+       if [ -n "${5}" ]; then
+               conf_desc="${conf_desc}, setup"
+               setup_line="setup = \"setup@${5}\";"
+       fi
+
+       cat << EOF >> ${1}
+                default = "conf@1";
+                conf@1 {
+                        description = "${conf_desc}";
+                       ${kernel_line}
+                       ${fdt_line}
+                       ${ramdisk_line}
+                       ${setup_line}
+EOF
+
+       if test -n "${FITIMAGE_HASH_ALGO}"; then
+               cat << EOF >> ${1}
+                        hash@1 {
+                                algo = "${conf_csum}";
+                        };
+EOF
+       fi
+
+       if [ ! -z "${conf_sign_keyname}" ] ; then
+
+               sign_line="sign-images = \"kernel\""
+
+               if [ -n "${3}" ]; then
+                       sign_line="${sign_line}, \"fdt\""
+               fi
+
+               if [ -n "${4}" ]; then
+                       sign_line="${sign_line}, \"ramdisk\""
+               fi
+
+               if [ -n "${5}" ]; then
+                       sign_line="${sign_line}, \"setup\""
+               fi
+
+               sign_line="${sign_line};"
+
+               cat << EOF >> ${1}
+                        signature@1 {
+                                algo = "${conf_csum},rsa2048";
+                                key-name-hint = "${conf_sign_keyname}";
+                               ${sign_line}
+                        };
+EOF
+       fi
+
+       cat << EOF >> ${1}
+                };
+EOF
+}
+
+#
+# Assemble fitImage
+#
+# $1 ... .its filename
+# $2 ... fitImage name
+# $3 ... include ramdisk
+fitimage_assemble() {
+       kernelcount=1
+       dtbcount=""
+       ramdiskcount=${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_ti_secure linux.bin linux.bin.sec
+       fitimage_emit_section_kernel ${1} "${kernelcount}" linux.bin.sec 
"${linux_comp}"
+
+       #
+       # Step 2: Prepare a DTB image section
+       #
+       if test -n "${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
+                       fitimage_ti_secure ${DTB_PATH} ${DTB_PATH}.sec
+                       if [ "x${FITIMAGE_DTB_BY_NAME}" = "x1" ] ; then
+                               fitimage_emit_section_dtb ${1} ${DTB} 
${DTB_PATH}.sec
+                       else
+                               fitimage_emit_section_dtb ${1} 
"fdt@${dtbcount}" ${DTB_PATH}.sec
+                       fi
+                       if [ "x${dtbcount}" = "x1" ]; then
+                               dtbref=${DTB}
+                       fi
+                       dtbcount=`expr ${dtbcount} + 1`
+               done
+       fi
+
+       #
+       # Step 3: Prepare a setup section. (For x86)
+       #
+       if test -e arch/${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
+               copy_initramfs
+               RAMDISK_FILE="usr/${INITRAMFS_IMAGE}-${MACHINE}.cpio"
+               xz -f -k -c ${XZ_COMPRESSION_LEVEL} ${XZ_THREADS} 
--check=${XZ_INTEGRITY_CHECK} ${RAMDISK_FILE} > ${RAMDISK_FILE}.xz
+               fitimage_ti_secure ${RAMDISK_FILE}.xz ${RAMDISK_FILE}.xz.sec
+               fitimage_emit_section_ramdisk ${1} "${ramdiskcount}" 
${RAMDISK_FILE}.xz.sec
+       fi
+
+       fitimage_emit_section_maint ${1} sectend
+
+       # Force the first Kernel and DTB in the default config
+       kernelcount=1
+       if test -n "${dtbcount}"; then
+               dtbcount=1
+       fi
+
+       #
+       # Step 5: Prepare a configurations section
+       #
+       fitimage_emit_section_maint ${1} confstart
+
+       if [ "x${FITIMAGE_DTB_BY_NAME}" = "x1" ] ; then
+               fitimage_emit_section_config ${1} "${kernelcount}" "${dtbref}" 
"${ramdiskcount}" "${setupcount}"
+       else
+               fitimage_emit_section_config ${1} "${kernelcount}" 
"fdt@${dtbcount}" "${ramdiskcount}" "${setupcount}"
+       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
+               uboot-mkimage \
+                       ${@'-D "${UBOOT_MKIMAGE_DTCOPTS}"' if 
len('${UBOOT_MKIMAGE_DTCOPTS}') else ''} \
+                       -F -k "${UBOOT_SIGN_KEYDIR}" \
+                       -K "${DEPLOY_DIR_IMAGE}/${UBOOT_DTB_BINARY}" \
+                       -r arch/${ARCH}/boot/${2}
+       fi
+}
+
+do_assemble_fitimage() {
+       if echo ${KERNEL_IMAGETYPES} | grep -wq "fitImage"; then
+               cd ${B}
+               fitimage_assemble fit-image.its fitImage
+       fi
+}
+
+addtask assemble_fitimage before do_install after do_compile
+
+do_assemble_fitimage_initramfs() {
+       if echo ${KERNEL_IMAGETYPES} | grep -wq "fitImage" && \
+               test -n "${INITRAMFS_IMAGE}" ; then
+               cd ${B}
+               fitimage_assemble fit-image-${INITRAMFS_IMAGE}.its 
fitImage-${INITRAMFS_IMAGE} 1
+       fi
+}
+
+addtask assemble_fitimage_initramfs before do_deploy after do_install
+
+FITIMAGE_ITS_SUFFIX ?= "its"
+FITIMAGE_ITB_SUFFIX ?= "itb"
+
+FITIMAGE_ITS_IMAGE ?= 
"fitImage-its-${PKGE}-${PKGV}-${PKGR}-${MACHINE}-${DATETIME}.${FITIMAGE_ITS_SUFFIX}"
+FITIMAGE_ITS_IMAGE[vardepsexclude] = "DATETIME"
+FITIMAGE_ITS_BINARY ?= "fitImage-its.${FITIMAGE_ITS_SUFFIX}"
+FITIMAGE_ITS_SYMLINK ?= "fitImage-its-${MACHINE}.${FITIMAGE_ITS_SUFFIX}"
+
+FITIMAGE_ITB_IMAGE ?= 
"fitImage-linux.bin-${PKGE}-${PKGV}-${PKGR}-${MACHINE}-${DATETIME}.${FITIMAGE_ITB_SUFFIX}"
+FITIMAGE_ITB_IMAGE[vardepsexclude] = "DATETIME"
+FITIMAGE_ITB_BINARY ?= "fitImage-linux.bin.${FITIMAGE_ITB_SUFFIX}"
+FITIMAGE_ITB_SYMLINK ?= "fitImage-linux.bin-${MACHINE}.${FITIMAGE_ITB_SUFFIX}"
+
+FITIMAGE_INITRAMFS_ITS_IMAGE ?= 
"fitImage-its-${INITRAMFS_IMAGE}-${PKGE}-${PKGV}-${PKGR}-${MACHINE}-${DATETIME}.${FITIMAGE_ITS_SUFFIX}"
+FITIMAGE_INITRAMFS_ITS_IMAGE[vardepsexclude] = "DATETIME"
+FITIMAGE_INITRAMFS_ITS_BINARY ?= 
"fitImage-its-${INITRAMFS_IMAGE}.${FITIMAGE_ITS_SUFFIX}"
+FITIMAGE_INITRAMFS_ITS_SYMLINK ?= 
"fitImage-its-${INITRAMFS_IMAGE}-${MACHINE}.${FITIMAGE_ITS_SUFFIX}"
+
+FITIMAGE_INITRAMFS_ITB_IMAGE ?= 
"fitImage-${INITRAMFS_IMAGE}-${PKGE}-${PKGV}-${PKGR}-${MACHINE}-${DATETIME}.${FITIMAGE_ITB_SUFFIX}"
+FITIMAGE_INITRAMFS_ITB_IMAGE[vardepsexclude] = "DATETIME"
+FITIMAGE_INITRAMFS_ITB_BINARY ?= 
"fitImage-${INITRAMFS_IMAGE}.${FITIMAGE_ITB_SUFFIX}"
+FITIMAGE_INITRAMFS_ITB_SYMLINK ?= 
"fitImage-${INITRAMFS_IMAGE}-${MACHINE}.${FITIMAGE_ITB_SUFFIX}"
+
+kernel_do_deploy_append() {
+       # Update deploy directory
+       if echo ${KERNEL_IMAGETYPES} | grep -wq "fitImage"; then
+               cd ${B}
+               echo "Copying fit-image.its source file..."
+               install -m 0644 fit-image.its ${DEPLOYDIR}/${FITIMAGE_ITS_IMAGE}
+               install -m 0644 linux.bin ${DEPLOYDIR}/${FITIMAGE_ITB_IMAGE}
+
+               if [ -n "${INITRAMFS_IMAGE}" ]; then
+                       echo "Copying fit-image-${INITRAMFS_IMAGE}.its source 
file..."
+                       install -m 0644 fit-image-${INITRAMFS_IMAGE}.its 
${DEPLOYDIR}/${FITIMAGE_INITRAMFS_ITS_IMAGE}
+                       install -m 0644 
arch/${ARCH}/boot/fitImage-${INITRAMFS_IMAGE} 
${DEPLOYDIR}/${FITIMAGE_INITRAMFS_ITB_IMAGE}
+               fi
+
+               cd ${DEPLOYDIR}
+               ln -sf ${FITIMAGE_ITS_IMAGE} ${FITIMAGE_ITS_SYMLINK}
+               ln -sf ${FITIMAGE_ITS_IMAGE} ${FITIMAGE_ITS_BINARY}
+               ln -sf ${FITIMAGE_ITB_IMAGE} ${FITIMAGE_ITB_SYMLINK}
+               ln -sf ${FITIMAGE_ITB_IMAGE} ${FITIMAGE_ITB_BINARY}
+
+               if [ -n "${INITRAMFS_IMAGE}" ]; then
+                       ln -sf ${FITIMAGE_INITRAMFS_ITS_IMAGE} 
${FITIMAGE_INITRAMFS_ITS_SYMLINK}
+                       ln -sf ${FITIMAGE_INITRAMFS_ITS_IMAGE} 
${FITIMAGE_INITRAMFS_ITS_BINARY}
+                       ln -sf ${FITIMAGE_INITRAMFS_ITB_IMAGE} 
${FITIMAGE_INITRAMFS_ITB_SYMLINK}
+                       ln -sf ${FITIMAGE_INITRAMFS_ITB_IMAGE} 
${FITIMAGE_INITRAMFS_ITB_BINARY}
+               fi
+       fi
+}
diff --git a/meta-arago-distro/classes/uboot-sign.bbclass 
b/meta-arago-distro/classes/uboot-sign.bbclass
new file mode 100644
index 0000000..3c56db8
--- /dev/null
+++ b/meta-arago-distro/classes/uboot-sign.bbclass
@@ -0,0 +1,95 @@
+# This file is part of U-Boot verified boot support and is intended to be
+# inherited from u-boot recipe and from kernel-fitimage.bbclass.
+#
+# The signature procedure requires the user to generate an RSA key and
+# certificate in a directory and to define the following variable:
+#
+#   UBOOT_SIGN_KEYDIR = "/keys/directory"
+#   UBOOT_SIGN_KEYNAME = "dev" # keys name in keydir (eg. "dev.crt", "dev.key")
+#   UBOOT_MKIMAGE_DTCOPTS = "-I dts -O dtb -p 2000"
+#   UBOOT_SIGN_ENABLE = "1"
+#
+# As verified boot depends on fitImage generation, following is also required:
+#
+#   KERNEL_CLASSES ?= " kernel-fitimage "
+#   KERNEL_IMAGETYPE ?= "fitImage"
+#
+# The signature support is limited to the use of CONFIG_OF_SEPARATE in U-Boot.
+#
+# The tasks sequence is set as below, using DEPLOY_IMAGE_DIR as common place to
+# treat the device tree blob:
+#
+#   u-boot:do_deploy_dtb
+#   u-boot:do_deploy
+#   virtual/kernel:do_assemble_fitimage
+#   u-boot:do_concat_dtb
+#   u-boot:do_install
+#
+# For more details on signature process, please refer to U-boot documentation.
+
+# Signature activation.
+UBOOT_SIGN_ENABLE ?= "0"
+
+# Default value for deployment filenames.
+UBOOT_DTB_IMAGE ?= "u-boot-${MACHINE}-${PV}-${PR}.dtb"
+UBOOT_DTB_BINARY ?= "u-boot.dtb"
+UBOOT_DTB_SYMLINK ?= "u-boot-${MACHINE}.dtb"
+UBOOT_NODTB_IMAGE ?= "u-boot-nodtb-${MACHINE}-${PV}-${PR}.${UBOOT_SUFFIX}"
+UBOOT_NODTB_BINARY ?= "u-boot-nodtb.${UBOOT_SUFFIX}"
+UBOOT_NODTB_SYMLINK ?= "u-boot-nodtb-${MACHINE}.${UBOOT_SUFFIX}"
+
+#
+# Following is relevant only for u-boot recipes:
+#
+
+do_deploy_dtb () {
+       mkdir -p ${DEPLOYDIR}
+       cd ${DEPLOYDIR}
+
+       if [ -f ${B}/${UBOOT_DTB_BINARY} ]; then
+               install ${B}/${UBOOT_DTB_BINARY} ${DEPLOYDIR}/${UBOOT_DTB_IMAGE}
+               rm -f ${UBOOT_DTB_BINARY} ${UBOOT_DTB_SYMLINK}
+               ln -sf ${UBOOT_DTB_IMAGE} ${UBOOT_DTB_SYMLINK}
+               ln -sf ${UBOOT_DTB_IMAGE} ${UBOOT_DTB_BINARY}
+       fi
+       if [ -f ${B}/${UBOOT_NODTB_BINARY} ]; then
+               install ${B}/${UBOOT_NODTB_BINARY} 
${DEPLOYDIR}/${UBOOT_NODTB_IMAGE}
+               rm -f ${UBOOT_NODTB_BINARY} ${UBOOT_NODTB_SYMLINK}
+               ln -sf ${UBOOT_NODTB_IMAGE} ${UBOOT_NODTB_SYMLINK}
+               ln -sf ${UBOOT_NODTB_IMAGE} ${UBOOT_NODTB_BINARY}
+       fi
+}
+
+do_concat_dtb () {
+       # Concatenate U-Boot w/o DTB & DTB with public key
+       # (cf. kernel-fitimage.bbclass for more details)
+       if [ "x${UBOOT_SIGN_ENABLE}" = "x1" ]; then
+               if [ "x${UBOOT_SUFFIX}" = "ximg" -o "x${UBOOT_SUFFIX}" = "xrom" 
] && \
+                       [ -e "${DEPLOYDIR}/${UBOOT_DTB_IMAGE}" ]; then
+                       cd ${B}
+                       oe_runmake EXT_DTB=${DEPLOYDIR}/${UBOOT_DTB_IMAGE}
+                       install ${S}/${UBOOT_BINARY} ${DEPLOYDIR}/${UBOOT_IMAGE}
+                       install ${S}/${UBOOT_BINARY} 
${DEPLOY_DIR_IMAGE}/${UBOOT_IMAGE}
+               elif [ -e "${DEPLOYDIR}/${UBOOT_NODTB_IMAGE}" -a -e 
"${DEPLOYDIR}/${UBOOT_DTB_IMAGE}" ]; then
+                       cd ${DEPLOYDIR}
+                       cat ${UBOOT_NODTB_IMAGE} ${UBOOT_DTB_IMAGE} | tee 
${B}/${UBOOT_BINARY} > ${UBOOT_IMAGE}
+               else
+                       bbwarn "Failure while adding public key to u-boot 
binary. Verified boot won't be available."
+               fi
+       fi
+}
+
+python () {
+       uboot_pn = d.getVar('PREFERRED_PROVIDER_u-boot', True) or 'u-boot'
+       if d.getVar('UBOOT_SIGN_ENABLE', True) == '1' and d.getVar('PN', True) 
== uboot_pn:
+               kernel_pn = d.getVar('PREFERRED_PROVIDER_virtual/kernel', True)
+
+               # u-boot.dtb and u-boot-nodtb.bin are deployed _before_ 
do_deploy
+               # Thus, do_deploy_setscene will also populate them in 
DEPLOY_IMAGE_DIR
+               bb.build.addtask('do_deploy_dtb', 'do_deploy', 'do_compile', d)
+
+               # do_concat_dtb is scheduled _before_ do_install as it 
overwrite the
+               # u-boot.bin in both DEPLOYDIR and DEPLOY_IMAGE_DIR.
+               bb.build.addtask('do_concat_dtb', 'do_install', None, d)
+               d.appendVarFlag('do_concat_dtb', 'depends', ' 
%s:do_assemble_fitimage' % kernel_pn)
+}
diff --git a/meta-arago-distro/conf/distro/arago.conf 
b/meta-arago-distro/conf/distro/arago.conf
index 36a8a39..03a107c 100644
--- a/meta-arago-distro/conf/distro/arago.conf
+++ b/meta-arago-distro/conf/distro/arago.conf
@@ -22,6 +22,23 @@ SDKPATH = "${@"/tmp/"+"x"*96+"/"+"y"*96}"
 IMAGE_CLASSES += "image_types_md5"
 IMAGE_FSTYPES += "tar.xz.md5"
 
+# FIT image for secure devices
+KERNEL_CLASSES = "kernel-fitimage"
+FITIMAGE_HASH_ALGO = ""
+FITIMAGE_DTB_BY_NAME = "1"
+
+KERNEL_IMAGETYPES_dra7xx-hs-evm = "zImage fitImage"
+INITRAMFS_IMAGE_dra7xx-hs-evm = "arago-base-tisdk-image"
+INITRAMFS_FSTYPES_dra7xx-hs-evm = "cpio.xz"
+
+KERNEL_IMAGETYPES_am57xx-hs-evm = "zImage fitImage"
+INITRAMFS_IMAGE_am57xx-hs-evm = "arago-base-tisdk-image"
+INITRAMFS_FSTYPES_am57xx-hs-evm = "cpio.xz"
+
+KERNEL_IMAGETYPES_am437x-hs-evm = "zImage fitImage"
+INITRAMFS_IMAGE_am437x-hs-evm = "arago-base-tisdk-image"
+INITRAMFS_FSTYPES_am437x-hs-evm = "cpio.xz"
+
 # Mask any broken recipes (currently none)
 #BBMASK = ""
 
-- 
2.7.4

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