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|
inherit image_types
#
# Create an image that can by written onto a SD card using dd.
#
# The disk layout used is:
#
# 0 -> IMAGE_ROOTFS_ALIGNMENT - reserved for other data
# IMAGE_ROOTFS_ALIGNMENT -> BOOT_SPACE - bootloader and kernel
# BOOT_SPACE -> SDIMG_SIZE - rootfs
#
# Default Free space = 1.3x
# Use IMAGE_OVERHEAD_FACTOR to add more space
# <--------->
# 4KiB 20MiB SDIMG_ROOTFS
# <-----------------------> <----------> <---------------------->
# ------------------------ ------------ ------------------------ -------------------------------
# | IMAGE_ROOTFS_ALIGNMENT | BOOT_SPACE | ROOTFS_SIZE | IMAGE_ROOTFS_ALIGNMENT |
# ------------------------ ------------ ------------------------ -------------------------------
# ^ ^ ^ ^ ^
# | | | | |
# 0 4096 4KiB + 20MiB 4KiB + 20Mib + SDIMG_ROOTFS 4KiB + 20MiB + SDIMG_ROOTFS + 4KiB
# Set kernel and boot loader
IMAGE_BOOTLOADER ?= "bcm2835-bootfiles"
# Boot partition volume id
BOOTDD_VOLUME_ID ?= "${MACHINE}"
# Boot partition size [in KiB]
BOOT_SPACE ?= "20480"
# Set alignment to 4MB [in KiB]
IMAGE_ROOTFS_ALIGNMENT = "4096"
# Use an uncompressed ext3 by default as rootfs
SDIMG_ROOTFS_TYPE ?= "ext3"
SDIMG_ROOTFS = "${IMAGE_NAME}.rootfs.${SDIMG_ROOTFS_TYPE}"
RPI_GPU_FIRMWARE ?= "arm192"
IMAGE_DEPENDS_rpi-sdimg = " \
parted-native \
mtools-native \
dosfstools-native \
virtual/kernel \
${IMAGE_BOOTLOADER} \
"
# SD card image name
SDIMG = "${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.rpi-sdimg"
# Additional files and/or directories to be copied into the vfat partition from the IMAGE_ROOTFS.
FATPAYLOAD ?= ""
IMAGEDATESTAMP = "${@time.strftime('%Y.%m.%d',time.gmtime())}"
IMAGE_CMD_rpi-sdimg () {
# Align partitions
BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE} + ${IMAGE_ROOTFS_ALIGNMENT} - 1)
BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE_ALIGNED} - ${BOOT_SPACE_ALIGNED} % ${IMAGE_ROOTFS_ALIGNMENT})
SDIMG_SIZE=$(expr ${IMAGE_ROOTFS_ALIGNMENT} + ${BOOT_SPACE_ALIGNED} + $ROOTFS_SIZE + ${IMAGE_ROOTFS_ALIGNMENT})
# Initialize sdcard image file
dd if=/dev/zero of=${SDIMG} bs=1 count=0 seek=$(expr 1024 \* ${SDIMG_SIZE})
# Create partition table
parted -s ${SDIMG} mklabel msdos
# Create boot partition and mark it as bootable
parted -s ${SDIMG} unit KiB mkpart primary fat32 ${IMAGE_ROOTFS_ALIGNMENT} $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT})
parted -s ${SDIMG} set 1 boot on
# Create rootfs partition
parted -s ${SDIMG} unit KiB mkpart primary ext2 $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT} \+ ${ROOTFS_SIZE})
parted ${SDIMG} print
# Create a vfat image with boot files
BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }')
mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
case "${RPI_GPU_FIRMWARE}" in
"arm128" | "arm192" | "arm224" | "arm240")
mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/${RPI_GPU_FIRMWARE}_start.elf ::start.elf
;;
*)
bberror "RPI_GPU_FIRMWARE is undefined or value not recognised. Possible values: arm128, arm192, arm224 or arm240."
exit 1
;;
esac
mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/config.txt ::
mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/cmdline.txt ::
mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/bootcode.bin ::
mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/loader.bin ::
mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}.bin ::kernel.img
if [ -n ${FATPAYLOAD} ] ; then
echo "Copying payload into VFAT"
for entry in ${FATPAYLOAD} ; do
# add the || true to stop aborting on vfat issues like not supporting .~lock files
mcopy -i ${WORKDIR}/boot.img -s -v ${IMAGE_ROOTFS}$entry :: || true
done
fi
# Add stamp file
echo "${IMAGE_NAME}-${IMAGEDATESTAMP}" > ${WORKDIR}/image-version-info
mcopy -i ${WORKDIR}/boot.img -v ${WORKDIR}//image-version-info ::
# Burn Partitions
dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
# If SDIMG_ROOTFS_TYPE is a .xz file use xzcat
if [[ "$SDIMG_ROOTFS_TYPE" == *.xz ]]
then
xzcat ${SDIMG_ROOTFS} | dd of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
else
dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
fi
}
ROOTFS_POSTPROCESS_COMMAND += " rpi_generate_sysctl_config ; "
rpi_generate_sysctl_config() {
# systemd sysctl config
test -d ${IMAGE_ROOTFS}${sysconfdir}/sysctl.d && \
echo "vm.min_free_kbytes = 8192" > ${IMAGE_ROOTFS}${sysconfdir}/sysctl.d/rpi-vm.conf
# sysv sysctl config
IMAGE_SYSCTL_CONF="${IMAGE_ROOTFS}${sysconfdir}/sysctl.conf"
test -e ${IMAGE_ROOTFS}${sysconfdir}/sysctl.conf && \
sed -e "/vm.min_free_kbytes/d" -i ${IMAGE_SYSCTL_CONF}
echo "" >> ${IMAGE_SYSCTL_CONF} && echo "vm.min_free_kbytes = 8192" >> ${IMAGE_SYSCTL_CONF}
}
|
