96 lines
3.5 KiB
Plaintext
96 lines
3.5 KiB
Plaintext
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# This file is part of U-Boot verified boot support and is intended to be
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# inherited from u-boot recipe and from kernel-fitimage.bbclass.
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#
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# The signature procedure requires the user to generate an RSA key and
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# certificate in a directory and to define the following variable:
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#
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# UBOOT_SIGN_KEYDIR = "/keys/directory"
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# UBOOT_SIGN_KEYNAME = "dev" # keys name in keydir (eg. "dev.crt", "dev.key")
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# UBOOT_MKIMAGE_DTCOPTS = "-I dts -O dtb -p 2000"
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# UBOOT_SIGN_ENABLE = "1"
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#
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# As verified boot depends on fitImage generation, following is also required:
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#
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# KERNEL_CLASSES ?= " kernel-fitimage "
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# KERNEL_IMAGETYPE ?= "fitImage"
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#
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# The signature support is limited to the use of CONFIG_OF_SEPARATE in U-Boot.
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#
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# The tasks sequence is set as below, using DEPLOY_IMAGE_DIR as common place to
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# treat the device tree blob:
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#
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# u-boot:do_deploy_dtb
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# u-boot:do_deploy
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# virtual/kernel:do_assemble_fitimage
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# u-boot:do_concat_dtb
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# u-boot:do_install
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#
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# For more details on signature process, please refer to U-Boot documentation.
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# Signature activation.
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UBOOT_SIGN_ENABLE ?= "0"
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# Default value for deployment filenames.
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UBOOT_DTB_IMAGE ?= "u-boot-${MACHINE}-${PV}-${PR}.dtb"
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UBOOT_DTB_BINARY ?= "u-boot.dtb"
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UBOOT_DTB_SYMLINK ?= "u-boot-${MACHINE}.dtb"
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UBOOT_NODTB_IMAGE ?= "u-boot-nodtb-${MACHINE}-${PV}-${PR}.${UBOOT_SUFFIX}"
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UBOOT_NODTB_BINARY ?= "u-boot-nodtb.${UBOOT_SUFFIX}"
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UBOOT_NODTB_SYMLINK ?= "u-boot-nodtb-${MACHINE}.${UBOOT_SUFFIX}"
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#
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# Following is relevant only for u-boot recipes:
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#
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do_deploy_dtb () {
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mkdir -p ${DEPLOYDIR}
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cd ${DEPLOYDIR}
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if [ -f ${B}/${UBOOT_DTB_BINARY} ]; then
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install ${B}/${UBOOT_DTB_BINARY} ${DEPLOYDIR}/${UBOOT_DTB_IMAGE}
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rm -f ${UBOOT_DTB_BINARY} ${UBOOT_DTB_SYMLINK}
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ln -sf ${UBOOT_DTB_IMAGE} ${UBOOT_DTB_SYMLINK}
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ln -sf ${UBOOT_DTB_IMAGE} ${UBOOT_DTB_BINARY}
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fi
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if [ -f ${B}/${UBOOT_NODTB_BINARY} ]; then
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install ${B}/${UBOOT_NODTB_BINARY} ${DEPLOYDIR}/${UBOOT_NODTB_IMAGE}
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rm -f ${UBOOT_NODTB_BINARY} ${UBOOT_NODTB_SYMLINK}
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ln -sf ${UBOOT_NODTB_IMAGE} ${UBOOT_NODTB_SYMLINK}
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ln -sf ${UBOOT_NODTB_IMAGE} ${UBOOT_NODTB_BINARY}
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fi
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}
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do_concat_dtb () {
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# Concatenate U-Boot w/o DTB & DTB with public key
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# (cf. kernel-fitimage.bbclass for more details)
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if [ "x${UBOOT_SIGN_ENABLE}" = "x1" ]; then
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if [ "x${UBOOT_SUFFIX}" = "ximg" -o "x${UBOOT_SUFFIX}" = "xrom" ] && \
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[ -e "${DEPLOYDIR}/${UBOOT_DTB_IMAGE}" ]; then
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cd ${B}
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oe_runmake EXT_DTB=${DEPLOYDIR}/${UBOOT_DTB_IMAGE}
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install ${B}/${UBOOT_BINARY} ${DEPLOYDIR}/${UBOOT_IMAGE}
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install ${B}/${UBOOT_BINARY} ${DEPLOY_DIR_IMAGE}/${UBOOT_IMAGE}
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elif [ -e "${DEPLOYDIR}/${UBOOT_NODTB_IMAGE}" -a -e "${DEPLOYDIR}/${UBOOT_DTB_IMAGE}" ]; then
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cd ${DEPLOYDIR}
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cat ${UBOOT_NODTB_IMAGE} ${UBOOT_DTB_IMAGE} | tee ${B}/${UBOOT_BINARY} > ${UBOOT_IMAGE}
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else
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bbwarn "Failure while adding public key to u-boot binary. Verified boot won't be available."
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fi
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fi
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}
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python () {
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uboot_pn = d.getVar('PREFERRED_PROVIDER_u-boot') or 'u-boot'
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if d.getVar('UBOOT_SIGN_ENABLE') == '1' and d.getVar('PN') == uboot_pn:
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kernel_pn = d.getVar('PREFERRED_PROVIDER_virtual/kernel')
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# u-boot.dtb and u-boot-nodtb.bin are deployed _before_ do_deploy
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# Thus, do_deploy_setscene will also populate them in DEPLOY_IMAGE_DIR
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bb.build.addtask('do_deploy_dtb', 'do_deploy', 'do_compile', d)
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# do_concat_dtb is scheduled _before_ do_install as it overwrite the
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# u-boot.bin in both DEPLOYDIR and DEPLOY_IMAGE_DIR.
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bb.build.addtask('do_concat_dtb', 'do_install', None, d)
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d.appendVarFlag('do_concat_dtb', 'depends', ' %s:do_assemble_fitimage' % kernel_pn)
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}
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