[meta-freescale] [PATCH] kernel-imximage.bbclass: Linux kernel with DCD headers
Otavio Salvador
otavio at ossystems.com.br
Mon Sep 25 11:20:22 PDT 2017
This new image type adds support to generate a Linux kernel with DCD
headers. Essentially it adds support to directly boot a Linux kernel
without a bootloader.
As the Linux kernel will be boot directly, it required that the Device
Tree is appended to the kernel image, which had support included in
OE-Core.
To have the Linux kernel generated with the DCD headers, following
steps must be followed:
- Linux kernel recipe must inherit kernel-imximage class;
- Device Tree appended Linux kernel must be used
(KERNEL_DEVICETREE_BUNDLE = "1");
- DCD header configuration must be provided (dcd.cfg or
dcd-<devicetree>.cfg);
Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
---
classes/kernel-imximage.bbclass | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
create mode 100644 classes/kernel-imximage.bbclass
diff --git a/classes/kernel-imximage.bbclass b/classes/kernel-imximage.bbclass
new file mode 100644
index 00000000..efc819f0
--- /dev/null
+++ b/classes/kernel-imximage.bbclass
@@ -0,0 +1,41 @@
+DEPENDS_append = ' u-boot-mkimage-native'
+
+IMXIMAGE_ENTRYPOINT ?= "${UBOOT_ENTRYPOINT}"
+
+imx_mkimage() {
+ uboot-mkimage -n $1 -T imximage -e ${IMXIMAGE_ENTRYPOINT} -d $2 $2.imx
+}
+
+gen_imximage() {
+ if [ -z "${IMXIMAGE_ENTRYPOINT}" ]; then
+ bbfatal "IMXIMAGE_ENTRYPOINT must have a valid value"
+ fi
+
+ for DTB in ${KERNEL_DEVICETREE}; do
+ DTB=`normalize_dtb "${DTB}"`
+ DTB_EXT=${DTB##*.}
+ DTB_BASE_NAME=`basename ${DTB} ."${DTB_EXT}"`
+ base_name="zImage-"${KERNEL_IMAGE_BASE_NAME}
+ symlink_name="zImage-"${KERNEL_IMAGE_SYMLINK_NAME}
+ DTB_NAME=`echo ${base_name} | sed "s/${MACHINE}/${DTB_BASE_NAME}/g"`
+ DTB_SYMLINK_NAME=`echo ${symlink_name} | sed "s/${MACHINE}/${DTB_BASE_NAME}/g"`
+ for DCD in dcd-${DTB}.cfg dcd.cfg; do
+ if [ -e "${WORKDIR}/${DCD}" ]; then
+ if [ -e ${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT}.bin ]; then
+ imx_mkimage ${WORKDIR}/${DCD} ${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT}.bin
+ ln -sf ${DTB_NAME}.${DTB_EXT}.bin.imx ${DEPLOYDIR}/$type-${DTB_BASE_NAME}.${DTB_EXT}.bin.imx
+ fi
+
+ if [ -e ${DEPLOYDIR}/zImage-${INITRAMFS_BASE_NAME}-${DTB_BASE_NAME}.${DTB_EXT}.bin ]; then
+ imx_mkimage ${WORKDIR}/${DCD} ${DEPLOYDIR}/zImage-${INITRAMFS_BASE_NAME}-${DTB_BASE_NAME}.${DTB_EXT}.bin
+ ln -sf zImage-${INITRAMFS_BASE_NAME}-${DTB_BASE_NAME}.${DTB_EXT}.bin.imx \
+ ${DEPLOYDIR}/zImage-initramfs-${DTB_BASE_NAME}.${DTB_EXT}-${MACHINE}.bin.imx
+ fi
+ fi
+ done
+ done
+}
+
+do_deploy_append() {
+ gen_imximage
+}
--
2.14.1
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