diff options
Diffstat (limited to 'meta-raspberrypi/classes/sdcard_image-rpi.bbclass')
| -rw-r--r-- | meta-raspberrypi/classes/sdcard_image-rpi.bbclass | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/meta-raspberrypi/classes/sdcard_image-rpi.bbclass b/meta-raspberrypi/classes/sdcard_image-rpi.bbclass new file mode 100644 index 000000000..f03595c2c --- /dev/null +++ b/meta-raspberrypi/classes/sdcard_image-rpi.bbclass @@ -0,0 +1,203 @@ +inherit image_types + +# +# Create an image that can be 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 +# <---------> +# 4MiB 40MiB SDIMG_ROOTFS +# <-----------------------> <----------> <----------------------> +# ------------------------ ------------ ------------------------ +# | IMAGE_ROOTFS_ALIGNMENT | BOOT_SPACE | ROOTFS_SIZE | +# ------------------------ ------------ ------------------------ +# ^ ^ ^ ^ +# | | | | +# 0 4MiB 4MiB + 40MiB 4MiB + 40Mib + SDIMG_ROOTFS + +# This image depends on the rootfs image +IMAGE_TYPEDEP_rpi-sdimg = "${SDIMG_ROOTFS_TYPE}" + +# Set kernel and boot loader +IMAGE_BOOTLOADER ?= "bcm2835-bootfiles" + +# Set initramfs extension +KERNEL_INITRAMFS ?= "" + +# Kernel image name +SDIMG_KERNELIMAGE_raspberrypi ?= "kernel.img" +SDIMG_KERNELIMAGE_raspberrypi2 ?= "kernel7.img" +SDIMG_KERNELIMAGE_raspberrypi3-64 ?= "kernel8.img" + +# Boot partition volume id +BOOTDD_VOLUME_ID ?= "${MACHINE}" + +# Boot partition size [in KiB] (will be rounded up to IMAGE_ROOTFS_ALIGNMENT) +BOOT_SPACE ?= "40960" + +# Set alignment to 4MB [in KiB] +IMAGE_ROOTFS_ALIGNMENT = "4096" + +# Use an uncompressed ext3 by default as rootfs +SDIMG_ROOTFS_TYPE ?= "ext3" +SDIMG_ROOTFS = "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.${SDIMG_ROOTFS_TYPE}" + +do_image_rpi_sdimg[depends] = " \ + parted-native:do_populate_sysroot \ + mtools-native:do_populate_sysroot \ + dosfstools-native:do_populate_sysroot \ + virtual/kernel:do_deploy \ + ${IMAGE_BOOTLOADER}:do_deploy \ + ${@bb.utils.contains('RPI_USE_U_BOOT', '1', 'u-boot:do_deploy', '',d)} \ + " + +do_image_rpi_sdimg[recrdeps] = "do_build" + +# SD card image name +SDIMG = "${IMGDEPLOYDIR}/${IMAGE_NAME}.rootfs.rpi-sdimg" + +# Compression method to apply to SDIMG after it has been created. Supported +# compression formats are "gzip", "bzip2" or "xz". The original .rpi-sdimg file +# is kept and a new compressed file is created if one of these compression +# formats is chosen. If SDIMG_COMPRESSION is set to any other value it is +# silently ignored. +#SDIMG_COMPRESSION ?= "" + +# Additional files and/or directories to be copied into the vfat partition from the IMAGE_ROOTFS. +FATPAYLOAD ?= "" + +# SD card vfat partition image name +SDIMG_VFAT = "${IMAGE_NAME}.vfat" +SDIMG_LINK_VFAT = "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.vfat" + +def split_overlays(d, out, ver=None): + dts = d.getVar("KERNEL_DEVICETREE") + if out: + overlays = oe.utils.str_filter_out('\S+\-overlay\.dtb$', dts, d) + overlays = oe.utils.str_filter_out('\S+\.dtbo$', overlays, d) + else: + overlays = oe.utils.str_filter('\S+\-overlay\.dtb$', dts, d) + \ + " " + oe.utils.str_filter('\S+\.dtbo$', dts, d) + + return overlays + +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) + + echo "Creating filesystem with Boot partition ${BOOT_SPACE_ALIGNED} KiB and RootFS $ROOTFS_SIZE KiB" + + # Check if we are building with device tree support + DTS="${KERNEL_DEVICETREE}" + + # Initialize sdcard image file + dd if=/dev/zero of=${SDIMG} bs=1024 count=0 seek=${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 to the end of disk + parted -s ${SDIMG} -- unit KiB mkpart primary ext2 $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) -1s + 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 }') + rm -f ${WORKDIR}/boot.img + mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/* ::/ + if test -n "${DTS}"; then + # Device Tree Overlays are assumed to be suffixed by '-overlay.dtb' (4.1.x) or by '.dtbo' (4.4.9+) string and will be put in a dedicated folder + DT_OVERLAYS="${@split_overlays(d, 0)}" + DT_ROOT="${@split_overlays(d, 1)}" + + # Copy board device trees to root folder + for DTB in $DT_ROOT; do + DTB_BASE_NAME=`basename ${DTB} .dtb` + + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${DTB_BASE_NAME}.dtb ::${DTB_BASE_NAME}.dtb + done + + # Copy device tree overlays to dedicated folder + mmd -i ${WORKDIR}/boot.img overlays + for DTB in $DT_OVERLAYS; do + DTB_EXT=${DTB##*.} + DTB_BASE_NAME=`basename ${DTB} ."${DTB_EXT}"` + + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${DTB_BASE_NAME}.${DTB_EXT} ::overlays/${DTB_BASE_NAME}.${DTB_EXT} + done + fi + if [ "${RPI_USE_U_BOOT}" = "1" ]; then + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/u-boot.bin ::${SDIMG_KERNELIMAGE} + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin ::${KERNEL_IMAGETYPE} + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/boot.scr ::boot.scr + else + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin ::${SDIMG_KERNELIMAGE} + fi + + 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}" > ${WORKDIR}/image-version-info + mcopy -i ${WORKDIR}/boot.img -v ${WORKDIR}/image-version-info :: + + # Deploy vfat partition (for u-boot case only) + if [ "${RPI_USE_U_BOOT}" = "1" ]; then + cp ${WORKDIR}/boot.img ${IMGDEPLOYDIR}/${SDIMG_VFAT} + ln -sf ${SDIMG_VFAT} ${SDIMG_LINK_VFAT} + fi + + # Burn Partitions + dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) + # If SDIMG_ROOTFS_TYPE is a .xz file use xzcat + if echo "${SDIMG_ROOTFS_TYPE}" | egrep -q "*\.xz" + then + xzcat ${SDIMG_ROOTFS} | dd of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) + else + dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) + fi + + # Optionally apply compression + case "${SDIMG_COMPRESSION}" in + "gzip") + gzip -k9 "${SDIMG}" + ;; + "bzip2") + bzip2 -k9 "${SDIMG}" + ;; + "xz") + xz -k "${SDIMG}" + ;; + esac +} + +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} +} |
