1inherit image_types 2 3# 4# Create an image that can be written onto a SD card using dd. 5# 6# The disk layout used is: 7# 8# 0 -> IMAGE_ROOTFS_ALIGNMENT - reserved for other data 9# IMAGE_ROOTFS_ALIGNMENT -> BOOT_SPACE - bootloader and kernel 10# BOOT_SPACE -> SDIMG_SIZE - rootfs 11# 12 13# Default Free space = 1.3x 14# Use IMAGE_OVERHEAD_FACTOR to add more space 15# <---------> 16# 4MiB 48MiB SDIMG_ROOTFS 17# <-----------------------> <----------> <----------------------> 18# ------------------------ ------------ ------------------------ 19# | IMAGE_ROOTFS_ALIGNMENT | BOOT_SPACE | ROOTFS_SIZE | 20# ------------------------ ------------ ------------------------ 21# ^ ^ ^ ^ 22# | | | | 23# 0 4MiB 4MiB + 48MiB 4MiB + 48Mib + SDIMG_ROOTFS 24 25# This image depends on the rootfs image 26IMAGE_TYPEDEP:rpi-sdimg = "${SDIMG_ROOTFS_TYPE}" 27 28# Kernel image name 29SDIMG_KERNELIMAGE:raspberrypi ?= "kernel.img" 30SDIMG_KERNELIMAGE:raspberrypi2 ?= "kernel7.img" 31SDIMG_KERNELIMAGE:raspberrypi3-64 ?= "kernel8.img" 32 33# Boot partition volume id 34# Shorten raspberrypi to just rpi to keep it under 11 characters 35# now enforced by mkfs.vfat from dosfstools-4.2 36BOOTDD_VOLUME_ID ?= "${@d.getVar('MACHINE').replace('raspberrypi', 'rpi')}" 37 38# Boot partition size [in KiB] (will be rounded up to IMAGE_ROOTFS_ALIGNMENT) 39BOOT_SPACE ?= "49152" 40 41# Set alignment to 4MB [in KiB] 42IMAGE_ROOTFS_ALIGNMENT = "4096" 43 44# Use an uncompressed ext3 by default as rootfs 45SDIMG_ROOTFS_TYPE ?= "ext3" 46SDIMG_ROOTFS = "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.${SDIMG_ROOTFS_TYPE}" 47 48# For the names of kernel artifacts 49inherit kernel-artifact-names 50 51RPI_SDIMG_EXTRA_DEPENDS ?= "" 52 53do_image_rpi_sdimg[depends] = " \ 54 parted-native:do_populate_sysroot \ 55 mtools-native:do_populate_sysroot \ 56 dosfstools-native:do_populate_sysroot \ 57 virtual/kernel:do_deploy \ 58 rpi-bootfiles:do_deploy \ 59 ${@bb.utils.contains('MACHINE_FEATURES', 'armstub', 'armstubs:do_deploy', '' ,d)} \ 60 ${@bb.utils.contains('RPI_USE_U_BOOT', '1', 'u-boot:do_deploy', '',d)} \ 61 ${@bb.utils.contains('RPI_USE_U_BOOT', '1', 'u-boot-default-script:do_deploy', '',d)} \ 62 ${RPI_SDIMG_EXTRA_DEPENDS} \ 63" 64 65do_image_rpi_sdimg[recrdeps] = "do_build" 66 67# SD card image name 68SDIMG = "${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.rpi-sdimg" 69 70# Additional files and/or directories to be copied into the vfat partition from the IMAGE_ROOTFS. 71FATPAYLOAD ?= "" 72 73# SD card vfat partition image name 74SDIMG_VFAT_DEPLOY ?= "${RPI_USE_U_BOOT}" 75SDIMG_VFAT = "${IMAGE_NAME}.vfat" 76SDIMG_LINK_VFAT = "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.vfat" 77 78def split_overlays(d, out, ver=None): 79 dts = d.getVar("KERNEL_DEVICETREE") 80 # 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 81 if out: 82 overlays = oe.utils.str_filter_out('\S+\-overlay\.dtb$', dts, d) 83 overlays = oe.utils.str_filter_out('\S+\.dtbo$', overlays, d) 84 else: 85 overlays = oe.utils.str_filter('\S+\-overlay\.dtb$', dts, d) + \ 86 " " + oe.utils.str_filter('\S+\.dtbo$', dts, d) 87 88 return overlays 89 90IMAGE_CMD:rpi-sdimg () { 91 92 # Align partitions 93 BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE} + ${IMAGE_ROOTFS_ALIGNMENT} - 1) 94 BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE_ALIGNED} - ${BOOT_SPACE_ALIGNED} % ${IMAGE_ROOTFS_ALIGNMENT}) 95 SDIMG_SIZE=$(expr ${IMAGE_ROOTFS_ALIGNMENT} + ${BOOT_SPACE_ALIGNED} + $ROOTFS_SIZE) 96 97 echo "Creating filesystem with Boot partition ${BOOT_SPACE_ALIGNED} KiB and RootFS $ROOTFS_SIZE KiB" 98 99 # Check if we are building with device tree support 100 DTS="${KERNEL_DEVICETREE}" 101 102 # Initialize sdcard image file 103 dd if=/dev/zero of=${SDIMG} bs=1024 count=0 seek=${SDIMG_SIZE} 104 105 # Create partition table 106 parted -s ${SDIMG} mklabel msdos 107 # Create boot partition and mark it as bootable 108 parted -s ${SDIMG} unit KiB mkpart primary fat32 ${IMAGE_ROOTFS_ALIGNMENT} $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) 109 parted -s ${SDIMG} set 1 boot on 110 # Create rootfs partition to the end of disk 111 parted -s ${SDIMG} -- unit KiB mkpart primary ext2 $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) -1s 112 parted ${SDIMG} print 113 114 # Create a vfat image with boot files 115 BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }') 116 rm -f ${WORKDIR}/boot.img 117 mkfs.vfat -F32 -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS 118 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${BOOTFILES_DIR_NAME}/* ::/ || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/${BOOTFILES_DIR_NAME}/* into boot.img" 119 if [ "${@bb.utils.contains("MACHINE_FEATURES", "armstub", "1", "0", d)}" = "1" ]; then 120 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/armstubs/${ARMSTUB} ::/ || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/armstubs/${ARMSTUB} into boot.img" 121 fi 122 if test -n "${DTS}"; then 123 # Copy board device trees to root folder 124 for dtbf in ${@split_overlays(d, True)}; do 125 dtb=`basename $dtbf` 126 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/$dtb ::$dtb || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/$dtb into boot.img" 127 done 128 129 # Copy device tree overlays to dedicated folder 130 mmd -i ${WORKDIR}/boot.img overlays 131 for dtbf in ${@split_overlays(d, False)}; do 132 dtb=`basename $dtbf` 133 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/$dtb ::overlays/$dtb || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/$dtb into boot.img" 134 done 135 fi 136 if [ "${RPI_USE_U_BOOT}" = "1" ]; then 137 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/u-boot.bin ::${SDIMG_KERNELIMAGE} || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/u-boot.bin into boot.img" 138 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/boot.scr ::boot.scr || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/boot.scr into boot.img" 139 if [ ! -z "${INITRAMFS_IMAGE}" -a "${INITRAMFS_IMAGE_BUNDLE}" = "1" ]; then 140 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${INITRAMFS_LINK_NAME}.bin ::${KERNEL_IMAGETYPE} || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${INITRAMFS_LINK_NAME}.bin into boot.img" 141 else 142 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE} ::${KERNEL_IMAGETYPE} || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE} into boot.img" 143 fi 144 else 145 if [ ! -z "${INITRAMFS_IMAGE}" -a "${INITRAMFS_IMAGE_BUNDLE}" = "1" ]; then 146 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${INITRAMFS_LINK_NAME}.bin ::${SDIMG_KERNELIMAGE} || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${INITRAMFS_LINK_NAME}.bin into boot.img" 147 else 148 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE} ::${SDIMG_KERNELIMAGE} || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE} into boot.img" 149 fi 150 fi 151 152 # Add files (eg. hypervisor binaries) from the deploy dir 153 if [ -n "${DEPLOYPAYLOAD}" ] ; then 154 echo "Copying deploy file payload into VFAT" 155 for entry in ${DEPLOYPAYLOAD} ; do 156 # Split entry at optional ':' to enable file renaming for the destination 157 if [ $(echo "$entry" | grep -c :) = "0" ] ; then 158 DEPLOY_FILE="$entry" 159 DEST_FILENAME="$entry" 160 else 161 DEPLOY_FILE="$(echo "$entry" | cut -f1 -d:)" 162 DEST_FILENAME="$(echo "$entry" | cut -f2- -d:)" 163 fi 164 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" 165 done 166 fi 167 168 if [ -n "${FATPAYLOAD}" ] ; then 169 echo "Copying payload into VFAT" 170 for entry in ${FATPAYLOAD} ; do 171 # use bbwarn instead of bbfatal to stop aborting on vfat issues like not supporting .~lock files 172 mcopy -v -i ${WORKDIR}/boot.img -s ${IMAGE_ROOTFS}$entry :: || bbwarn "mcopy cannot copy ${IMAGE_ROOTFS}$entry into boot.img" 173 done 174 fi 175 176 # Add stamp file 177 echo "${IMAGE_NAME}" > ${WORKDIR}/image-version-info 178 mcopy -v -i ${WORKDIR}/boot.img ${WORKDIR}/image-version-info :: || bbfatal "mcopy cannot copy ${WORKDIR}/image-version-info into boot.img" 179 180 # Deploy vfat partition 181 if [ "${SDIMG_VFAT_DEPLOY}" = "1" ]; then 182 cp ${WORKDIR}/boot.img ${IMGDEPLOYDIR}/${SDIMG_VFAT} 183 ln -sf ${SDIMG_VFAT} ${SDIMG_LINK_VFAT} 184 fi 185 186 # Burn Partitions 187 dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) 188 # If SDIMG_ROOTFS_TYPE is a .xz file use xzcat 189 if echo "${SDIMG_ROOTFS_TYPE}" | egrep -q "*\.xz" 190 then 191 xzcat ${SDIMG_ROOTFS} | dd of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) 192 else 193 dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) 194 fi 195} 196 197ROOTFS_POSTPROCESS_COMMAND += " rpi_generate_sysctl_config ; " 198 199rpi_generate_sysctl_config() { 200 # systemd sysctl config 201 test -d ${IMAGE_ROOTFS}${sysconfdir}/sysctl.d && \ 202 echo "vm.min_free_kbytes = 8192" > ${IMAGE_ROOTFS}${sysconfdir}/sysctl.d/rpi-vm.conf 203 204 # sysv sysctl config 205 IMAGE_SYSCTL_CONF="${IMAGE_ROOTFS}${sysconfdir}/sysctl.conf" 206 test -e ${IMAGE_ROOTFS}${sysconfdir}/sysctl.conf && \ 207 sed -e "/vm.min_free_kbytes/d" -i ${IMAGE_SYSCTL_CONF} 208 echo "" >> ${IMAGE_SYSCTL_CONF} && echo "vm.min_free_kbytes = 8192" >> ${IMAGE_SYSCTL_CONF} 209} 210