diff options
Diffstat (limited to 'meta-ti-bsp/classes/uboot-sign-legacyhs.bbclass')
| -rw-r--r-- | meta-ti-bsp/classes/uboot-sign-legacyhs.bbclass | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/meta-ti-bsp/classes/uboot-sign-legacyhs.bbclass b/meta-ti-bsp/classes/uboot-sign-legacyhs.bbclass new file mode 100644 index 00000000..102232b9 --- /dev/null +++ b/meta-ti-bsp/classes/uboot-sign-legacyhs.bbclass @@ -0,0 +1,131 @@ +# 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_install:append +# Install UBOOT_DTB_BINARY to datadir, so that kernel can use it for +# signing, and kernel will deploy UBOOT_DTB_BINARY after signs it. +# +# * virtual/kernel:do_assemble_fitimage +# Sign the image +# +# * u-boot:do_deploy[postfuncs] +# Deploy files like UBOOT_DTB_IMAGE, UBOOT_DTB_SYMLINK and others. +# +# 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}.${UBOOT_SUFFIX}" + +# Functions in this bbclass is for u-boot only +UBOOT_PN = "${@d.getVar('PREFERRED_PROVIDER_u-boot') or 'u-boot'}" + +concat_dtb_helper() { + if [ -e "${UBOOT_DTB_BINARY}" ]; then + ln -sf ${UBOOT_DTB_IMAGE} ${DEPLOYDIR}/${UBOOT_DTB_BINARY} + ln -sf ${UBOOT_DTB_IMAGE} ${DEPLOYDIR}/${UBOOT_DTB_SYMLINK} + fi + + if [ -f "${UBOOT_NODTB_BINARY}" ]; then + install ${UBOOT_NODTB_BINARY} ${DEPLOYDIR}/${UBOOT_NODTB_IMAGE} + ln -sf ${UBOOT_NODTB_IMAGE} ${DEPLOYDIR}/${UBOOT_NODTB_SYMLINK} + ln -sf ${UBOOT_NODTB_IMAGE} ${DEPLOYDIR}/${UBOOT_NODTB_BINARY} + fi + + # Concatenate U-Boot w/o DTB & DTB with public key + # (cf. kernel-fitimage.bbclass for more details) + deployed_uboot_dtb_binary='${DEPLOY_DIR_IMAGE}/${UBOOT_DTB_IMAGE}' + if [ "x${UBOOT_SUFFIX}" = "ximg" -o "x${UBOOT_SUFFIX}" = "xrom" ] && \ + [ -e "$deployed_uboot_dtb_binary" ]; then + oe_runmake EXT_DTB=$deployed_uboot_dtb_binary + install ${UBOOT_BINARY} ${DEPLOYDIR}/${UBOOT_IMAGE} + elif [ -e "${DEPLOYDIR}/${UBOOT_NODTB_IMAGE}" -a -e "$deployed_uboot_dtb_binary" ]; then + cd ${DEPLOYDIR} + cat ${UBOOT_NODTB_IMAGE} $deployed_uboot_dtb_binary | tee ${B}/${CONFIG_B_PATH}/${UBOOT_BINARY} > ${UBOOT_IMAGE} + else + bbwarn "Failure while adding public key to u-boot binary. Verified boot won't be available." + fi +} + +concat_dtb() { + if [ "${UBOOT_SIGN_ENABLE}" = "1" -a "${PN}" = "${UBOOT_PN}" -a -n "${UBOOT_DTB_BINARY}" ]; then + mkdir -p ${DEPLOYDIR} + if [ -n "${UBOOT_CONFIG}" ]; then + for config in ${UBOOT_MACHINE}; do + CONFIG_B_PATH="${config}" + cd ${B}/${config} + concat_dtb_helper + done + else + CONFIG_B_PATH="" + cd ${B} + concat_dtb_helper + fi + fi +} + +# Install UBOOT_DTB_BINARY to datadir, so that kernel can use it for +# signing, and kernel will deploy UBOOT_DTB_BINARY after signs it. +install_helper() { + if [ -f "${UBOOT_DTB_BINARY}" ]; then + install -d ${D}${datadir} + # UBOOT_DTB_BINARY is a symlink to UBOOT_DTB_IMAGE, so we + # need both of them. + install ${UBOOT_DTB_BINARY} ${D}${datadir}/${UBOOT_DTB_IMAGE} + ln -sf ${UBOOT_DTB_IMAGE} ${D}${datadir}/${UBOOT_DTB_BINARY} + else + bbwarn "${UBOOT_DTB_BINARY} not found" + fi +} + +do_install:append() { + if [ "${UBOOT_SIGN_ENABLE}" = "1" -a "${PN}" = "${UBOOT_PN}" -a -n "${UBOOT_DTB_BINARY}" ]; then + if [ -n "${UBOOT_CONFIG}" ]; then + for config in ${UBOOT_MACHINE}; do + cd ${B}/${config} + install_helper + done + else + cd ${B} + install_helper + fi + fi +} + +python () { + if d.getVar('UBOOT_SIGN_ENABLE') == '1' and d.getVar('PN') == d.getVar('UBOOT_PN') and d.getVar('UBOOT_DTB_BINARY'): + kernel_pn = d.getVar('PREFERRED_PROVIDER_virtual/kernel') + + # Make "bitbake u-boot -cdeploy" deploys the signed u-boot.dtb + d.appendVarFlag('do_deploy', 'depends', ' %s:do_deploy' % kernel_pn) + + # kernerl's do_deploy is a litle special, so we can't use + # do_deploy:append, otherwise it would override + # kernel_do_deploy. + d.appendVarFlag('do_deploy', 'prefuncs', ' concat_dtb') +} |