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- # 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 ${B}/${UBOOT_BINARY} ${DEPLOYDIR}/${UBOOT_IMAGE}
- install ${B}/${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') or 'u-boot'
- if d.getVar('UBOOT_SIGN_ENABLE') == '1' and d.getVar('PN') == uboot_pn:
- kernel_pn = d.getVar('PREFERRED_PROVIDER_virtual/kernel')
- # 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)
- }
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