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 78IMAGE_CMD:rpi-sdimg () { 79 80 # Align partitions 81 BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE} + ${IMAGE_ROOTFS_ALIGNMENT} - 1) 82 BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE_ALIGNED} - ${BOOT_SPACE_ALIGNED} % ${IMAGE_ROOTFS_ALIGNMENT}) 83 SDIMG_SIZE=$(expr ${IMAGE_ROOTFS_ALIGNMENT} + ${BOOT_SPACE_ALIGNED} + $ROOTFS_SIZE) 84 85 echo "Creating filesystem with Boot partition ${BOOT_SPACE_ALIGNED} KiB and RootFS $ROOTFS_SIZE KiB" 86 87 # Check if we are building with device tree support 88 DTS="${@make_dtb_boot_files(d)}" 89 90 # Initialize sdcard image file 91 dd if=/dev/zero of=${SDIMG} bs=1024 count=0 seek=${SDIMG_SIZE} 92 93 # Create partition table 94 parted -s ${SDIMG} mklabel msdos 95 # Create boot partition and mark it as bootable 96 parted -s ${SDIMG} unit KiB mkpart primary fat32 ${IMAGE_ROOTFS_ALIGNMENT} $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) 97 parted -s ${SDIMG} set 1 boot on 98 # Create rootfs partition to the end of disk 99 parted -s ${SDIMG} -- unit KiB mkpart primary ext2 $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) -1s 100 parted ${SDIMG} print 101 102 # Create a vfat image with boot files 103 BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }') 104 rm -f ${WORKDIR}/boot.img 105 mkfs.vfat -F32 -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS 106 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" 107 if [ "${@bb.utils.contains("MACHINE_FEATURES", "armstub", "1", "0", d)}" = "1" ]; then 108 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/armstubs/${ARMSTUB} ::/ || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/armstubs/${ARMSTUB} into boot.img" 109 fi 110 if test -n "${DTS}"; then 111 # Copy board device trees (including overlays) 112 # There is an assumption here - no DTB in other directories than root 113 # and root/overlays. mmd/mcopy are not very flexible tools. 114 mmd -i ${WORKDIR}/boot.img overlays 115 for entry in ${DTS} ; do 116 # Split entry at optional ';' 117 if [ $(echo "$entry" | grep -c \;) = "0" ] ; then 118 DEPLOY_FILE="$entry" 119 DEST_FILENAME="$entry" 120 else 121 DEPLOY_FILE="$(echo "$entry" | cut -f1 -d\;)" 122 DEST_FILENAME="$(echo "$entry" | cut -f2- -d\;)" 123 fi 124 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" 125 done 126 fi 127 if [ "${RPI_USE_U_BOOT}" = "1" ]; then 128 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" 129 mcopy -v -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/boot.scr ::boot.scr || bbfatal "mcopy cannot copy ${DEPLOY_DIR_IMAGE}/boot.scr into boot.img" 130 if [ ! -z "${INITRAMFS_IMAGE}" -a "${INITRAMFS_IMAGE_BUNDLE}" = "1" ]; then 131 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" 132 else 133 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" 134 fi 135 else 136 if [ ! -z "${INITRAMFS_IMAGE}" -a "${INITRAMFS_IMAGE_BUNDLE}" = "1" ]; then 137 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" 138 else 139 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" 140 fi 141 fi 142 143 # Add files (eg. hypervisor binaries) from the deploy dir 144 if [ -n "${DEPLOYPAYLOAD}" ] ; then 145 echo "Copying deploy file payload into VFAT" 146 for entry in ${DEPLOYPAYLOAD} ; do 147 # Split entry at optional ':' to enable file renaming for the destination 148 if [ $(echo "$entry" | grep -c :) = "0" ] ; then 149 DEPLOY_FILE="$entry" 150 DEST_FILENAME="$entry" 151 else 152 DEPLOY_FILE="$(echo "$entry" | cut -f1 -d:)" 153 DEST_FILENAME="$(echo "$entry" | cut -f2- -d:)" 154 fi 155 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" 156 done 157 fi 158 159 if [ -n "${FATPAYLOAD}" ] ; then 160 echo "Copying payload into VFAT" 161 for entry in ${FATPAYLOAD} ; do 162 # use bbwarn instead of bbfatal to stop aborting on vfat issues like not supporting .~lock files 163 mcopy -v -i ${WORKDIR}/boot.img -s ${IMAGE_ROOTFS}$entry :: || bbwarn "mcopy cannot copy ${IMAGE_ROOTFS}$entry into boot.img" 164 done 165 fi 166 167 # Add stamp file 168 echo "${IMAGE_NAME}" > ${WORKDIR}/image-version-info 169 mcopy -v -i ${WORKDIR}/boot.img ${WORKDIR}/image-version-info :: || bbfatal "mcopy cannot copy ${WORKDIR}/image-version-info into boot.img" 170 171 # Deploy vfat partition 172 if [ "${SDIMG_VFAT_DEPLOY}" = "1" ]; then 173 cp ${WORKDIR}/boot.img ${IMGDEPLOYDIR}/${SDIMG_VFAT} 174 ln -sf ${SDIMG_VFAT} ${SDIMG_LINK_VFAT} 175 fi 176 177 # Burn Partitions 178 dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) 179 # If SDIMG_ROOTFS_TYPE is a .xz file use xzcat 180 if echo "${SDIMG_ROOTFS_TYPE}" | egrep -q "*\.xz" 181 then 182 xzcat ${SDIMG_ROOTFS} | dd of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) 183 else 184 dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) 185 fi 186} 187 188ROOTFS_POSTPROCESS_COMMAND += " rpi_generate_sysctl_config ; " 189 190rpi_generate_sysctl_config() { 191 # systemd sysctl config 192 test -d ${IMAGE_ROOTFS}${sysconfdir}/sysctl.d && \ 193 echo "vm.min_free_kbytes = 8192" > ${IMAGE_ROOTFS}${sysconfdir}/sysctl.d/rpi-vm.conf 194 195 # sysv sysctl config 196 IMAGE_SYSCTL_CONF="${IMAGE_ROOTFS}${sysconfdir}/sysctl.conf" 197 test -e ${IMAGE_ROOTFS}${sysconfdir}/sysctl.conf && \ 198 sed -e "/vm.min_free_kbytes/d" -i ${IMAGE_SYSCTL_CONF} 199 echo "" >> ${IMAGE_SYSCTL_CONF} && echo "vm.min_free_kbytes = 8192" >> ${IMAGE_SYSCTL_CONF} 200} 201