124 lines
5.0 KiB
Plaintext
124 lines
5.0 KiB
Plaintext
inherit image_types
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#
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# Create an image that can be written onto a SD card using dd.
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#
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# The disk layout used is:
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#
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# 0 -> IMAGE_ROOTFS_ALIGNMENT - reserved for other data
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# IMAGE_ROOTFS_ALIGNMENT -> BOOT_SPACE - bootloader and kernel
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# BOOT_SPACE -> SDIMG_SIZE - rootfs
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#
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# Default Free space = 1.3x
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# Use IMAGE_OVERHEAD_FACTOR to add more space
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# <--------->
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# 2MiB 48MiB SDIMG_ROOTFS
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# <-----------------------> <----------> <---------------------->
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# ------------------------ ------------ ------------------------
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# | IMAGE_ROOTFS_ALIGNMENT | BOOT_SPACE | ROOTFS_SIZE |
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# ------------------------ ------------ ------------------------
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# ^ ^ ^ ^
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# | | | |
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# 0 2MiB 2MiB + 48MiB 2MiB + 48Mib + SDIMG_ROOTFS
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# This image depends on the rootfs image
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IMAGE_TYPEDEP:pengwyn-sdimg = "${SDIMG_ROOTFS_TYPE}"
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# Kernel image name
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SDIMG_KERNELIMAGE:pengwyn ?= "uImage"
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# Boot partition volume id
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# Shorten machine name to keep it under 11 characters
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# now enforced by mkfs.vfat from dosfstools-4.2
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BOOTDD_VOLUME_ID ?= "${@d.getVar('MACHINE')}"
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# Boot partition size [in KiB] (will be rounded up to IMAGE_ROOTFS_ALIGNMENT)
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BOOT_SPACE ?= "49152"
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# Set alignment to 2MB [in KiB]
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IMAGE_ROOTFS_ALIGNMENT = "2048"
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# Use an uncompressed ext3 by default as rootfs
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SDIMG_ROOTFS_TYPE ?= "ext4"
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SDIMG_ROOTFS = "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.${SDIMG_ROOTFS_TYPE}"
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# For the names of kernel artifacts
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inherit kernel-artifact-names
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do_image_pengwyn_sdimg[depends] = " \
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parted-native:do_populate_sysroot \
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mtools-native:do_populate_sysroot \
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dosfstools-native:do_populate_sysroot \
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virtual/kernel:do_deploy \
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virtual/bootloader:do_deploy \
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virtual/dtb:do_deploy \
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"
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do_image_pengwyn_sdimg[recrdeps] = "do_build"
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# SD card image name
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SDIMG = "${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.sdimg"
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# Additional files and/or directories to be copied into the vfat partition from the IMAGE_ROOTFS.
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#FATPAYLOAD ?= ""
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# SD card vfat partition image name
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#SDIMG_VFAT_DEPLOY ?= "${RPI_USE_U_BOOT}"
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#SDIMG_VFAT = "${IMAGE_NAME}.vfat"
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#SDIMG_LINK_VFAT = "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.vfat"
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# Specifies the command to create the image file for a specific image type,
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# which corresponds to the value set in IMAGE_FSTYPES, (e.g. ext3, btrfs, and so forth).
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# When setting this variable, you should use an override for the associated type
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IMAGE_CMD:pengwyn-sdimg () {
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# Align partitions
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BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE} + ${IMAGE_ROOTFS_ALIGNMENT} - 1)
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BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE_ALIGNED} - ${BOOT_SPACE_ALIGNED} % ${IMAGE_ROOTFS_ALIGNMENT})
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SDIMG_SIZE=$(expr ${IMAGE_ROOTFS_ALIGNMENT} + ${BOOT_SPACE_ALIGNED} + $ROOTFS_SIZE)
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echo "** PENGWYN ** Creating filesystem with Boot partition ${BOOT_SPACE_ALIGNED} KiB and RootFS $ROOTFS_SIZE KiB"
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# Initialize sdcard image file
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dd if=/dev/zero of=${SDIMG} bs=1024 count=0 seek=${SDIMG_SIZE}
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# Create partition table
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parted -s ${SDIMG} mklabel msdos
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# Create boot partition and mark it as bootable
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parted -s ${SDIMG} unit KiB mkpart primary fat32 ${IMAGE_ROOTFS_ALIGNMENT} $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT})
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parted -s ${SDIMG} set 1 boot on
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# Create rootfs partition to the end of disk
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parted -s ${SDIMG} -- unit KiB mkpart primary ext4 $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) -1s
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parted ${SDIMG} print
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# Create a vfat image with boot files
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BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }')
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echo "SDIMG_SIZE: ${SDIMG_SIZE}"
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echo "IMGDEPLOYDIR: ${IMGDEPLOYDIR}"
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echo "IMAGE_BOOT_FILES: ${IMAGE_BOOT_FILES}"
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echo "DEPLOY_DIR_IMAGE: ${DEPLOY_DIR_IMAGE}"
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rm -f ${WORKDIR}/boot.img
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mkfs.vfat -F32 -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
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for entry in ${IMAGE_BOOT_FILES}; do
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if [ $(echo "$entry" | grep -c /) = "0" ] ; then
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DEPLOY_FILE="$entry"
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DEST_FILENAME="$entry"
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else
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DEPLOY_FILE="$entry"
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DEST_FILENAME="$(echo "$entry" | cut -f2 -d/)"
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fi
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mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${DEPLOY_FILE} ::${DEST_FILENAME} || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/${DEPLOY_FILE} into boot.img"
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done
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# Burn Partitions
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dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024)
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# If SDIMG_ROOTFS_TYPE is a .xz file use xzcat
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if echo "${SDIMG_ROOTFS_TYPE}" | egrep -q "*\.xz"
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then
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xzcat ${SDIMG_ROOTFS} | dd of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024)
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else
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dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024)
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fi
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}
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