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 40MiB SDIMG_ROOTFS 17# <-----------------------> <----------> <----------------------> 18# ------------------------ ------------ ------------------------ 19# | IMAGE_ROOTFS_ALIGNMENT | BOOT_SPACE | ROOTFS_SIZE | 20# ------------------------ ------------ ------------------------ 21# ^ ^ ^ ^ 22# | | | | 23# 0 4MiB 4MiB + 40MiB 4MiB + 40Mib + SDIMG_ROOTFS 24 25# This image depends on the rootfs image 26IMAGE_TYPEDEP_rpi-sdimg = "${SDIMG_ROOTFS_TYPE}" 27 28# Set kernel and boot loader 29IMAGE_BOOTLOADER ?= "bcm2835-bootfiles" 30 31# Kernel image name 32SDIMG_KERNELIMAGE_raspberrypi ?= "kernel.img" 33SDIMG_KERNELIMAGE_raspberrypi2 ?= "kernel7.img" 34SDIMG_KERNELIMAGE_raspberrypi3-64 ?= "kernel8.img" 35 36# Boot partition volume id 37BOOTDD_VOLUME_ID ?= "${MACHINE}" 38 39# Boot partition size [in KiB] (will be rounded up to IMAGE_ROOTFS_ALIGNMENT) 40BOOT_SPACE ?= "40960" 41 42# Set alignment to 4MB [in KiB] 43IMAGE_ROOTFS_ALIGNMENT = "4096" 44 45# Use an uncompressed ext3 by default as rootfs 46SDIMG_ROOTFS_TYPE ?= "ext3" 47SDIMG_ROOTFS = "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.${SDIMG_ROOTFS_TYPE}" 48 49# For the names of kernel artifacts 50inherit kernel-artifact-names 51 52do_image_rpi_sdimg[depends] = " \ 53 parted-native:do_populate_sysroot \ 54 mtools-native:do_populate_sysroot \ 55 dosfstools-native:do_populate_sysroot \ 56 virtual/kernel:do_deploy \ 57 ${IMAGE_BOOTLOADER}:do_deploy \ 58 ${@bb.utils.contains('RPI_USE_U_BOOT', '1', 'u-boot:do_deploy', '',d)} \ 59 ${@bb.utils.contains('RPI_USE_U_BOOT', '1', 'rpi-u-boot-scr:do_deploy', '',d)} \ 60" 61 62do_image_rpi_sdimg[recrdeps] = "do_build" 63 64# SD card image name 65SDIMG = "${IMGDEPLOYDIR}/${IMAGE_NAME}.rootfs.rpi-sdimg" 66 67# Compression method to apply to SDIMG after it has been created. Supported 68# compression formats are "gzip", "bzip2" or "xz". The original .rpi-sdimg file 69# is kept and a new compressed file is created if one of these compression 70# formats is chosen. If SDIMG_COMPRESSION is set to any other value it is 71# silently ignored. 72#SDIMG_COMPRESSION ?= "" 73 74# Additional files and/or directories to be copied into the vfat partition from the IMAGE_ROOTFS. 75FATPAYLOAD ?= "" 76 77# SD card vfat partition image name 78SDIMG_VFAT_DEPLOY ?= "${RPI_USE_U_BOOT}" 79SDIMG_VFAT = "${IMAGE_NAME}.vfat" 80SDIMG_LINK_VFAT = "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.vfat" 81 82def split_overlays(d, out, ver=None): 83 dts = d.getVar("KERNEL_DEVICETREE") 84 # Device Tree Overlays are assumed to be suffixed by '-overlay.dtb' (4.1.x) or by '.dtbo' (4.4.9+) string and will be put in a dedicated folder 85 if out: 86 overlays = oe.utils.str_filter_out('\S+\-overlay\.dtb$', dts, d) 87 overlays = oe.utils.str_filter_out('\S+\.dtbo$', overlays, d) 88 else: 89 overlays = oe.utils.str_filter('\S+\-overlay\.dtb$', dts, d) + \ 90 " " + oe.utils.str_filter('\S+\.dtbo$', dts, d) 91 92 return overlays 93 94IMAGE_CMD_rpi-sdimg () { 95 96 # Align partitions 97 BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE} + ${IMAGE_ROOTFS_ALIGNMENT} - 1) 98 BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE_ALIGNED} - ${BOOT_SPACE_ALIGNED} % ${IMAGE_ROOTFS_ALIGNMENT}) 99 SDIMG_SIZE=$(expr ${IMAGE_ROOTFS_ALIGNMENT} + ${BOOT_SPACE_ALIGNED} + $ROOTFS_SIZE) 100 101 echo "Creating filesystem with Boot partition ${BOOT_SPACE_ALIGNED} KiB and RootFS $ROOTFS_SIZE KiB" 102 103 # Check if we are building with device tree support 104 DTS="${KERNEL_DEVICETREE}" 105 106 # Initialize sdcard image file 107 dd if=/dev/zero of=${SDIMG} bs=1024 count=0 seek=${SDIMG_SIZE} 108 109 # Create partition table 110 parted -s ${SDIMG} mklabel msdos 111 # Create boot partition and mark it as bootable 112 parted -s ${SDIMG} unit KiB mkpart primary fat32 ${IMAGE_ROOTFS_ALIGNMENT} $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) 113 parted -s ${SDIMG} set 1 boot on 114 # Create rootfs partition to the end of disk 115 parted -s ${SDIMG} -- unit KiB mkpart primary ext2 $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) -1s 116 parted ${SDIMG} print 117 118 # Create a vfat image with boot files 119 BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }') 120 rm -f ${WORKDIR}/boot.img 121 mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS 122 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/* ::/ 123 if test -n "${DTS}"; then 124 # Copy board device trees to root folder 125 for dtbf in ${@split_overlays(d, True)}; do 126 dtb=`basename $dtbf` 127 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/$dtb ::$dtb 128 done 129 130 # Copy device tree overlays to dedicated folder 131 mmd -i ${WORKDIR}/boot.img overlays 132 for dtbf in ${@split_overlays(d, False)}; do 133 dtb=`basename $dtbf` 134 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/$dtb ::overlays/$dtb 135 done 136 fi 137 if [ "${RPI_USE_U_BOOT}" = "1" ]; then 138 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/u-boot.bin ::${SDIMG_KERNELIMAGE} 139 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/boot.scr ::boot.scr 140 if [ ! -z "${INITRAMFS_IMAGE}" -a "${INITRAMFS_IMAGE_BUNDLE}" = "1" ]; then 141 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${INITRAMFS_LINK_NAME}.bin ::${KERNEL_IMAGETYPE} 142 else 143 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE} ::${KERNEL_IMAGETYPE} 144 fi 145 else 146 if [ ! -z "${INITRAMFS_IMAGE}" -a "${INITRAMFS_IMAGE_BUNDLE}" = "1" ]; then 147 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${INITRAMFS_LINK_NAME}.bin ::${SDIMG_KERNELIMAGE} 148 else 149 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE} ::${SDIMG_KERNELIMAGE} 150 fi 151 fi 152 153 if [ -n ${FATPAYLOAD} ] ; then 154 echo "Copying payload into VFAT" 155 for entry in ${FATPAYLOAD} ; do 156 # add the || true to stop aborting on vfat issues like not supporting .~lock files 157 mcopy -i ${WORKDIR}/boot.img -s -v ${IMAGE_ROOTFS}$entry :: || true 158 done 159 fi 160 161 # Add stamp file 162 echo "${IMAGE_NAME}" > ${WORKDIR}/image-version-info 163 mcopy -i ${WORKDIR}/boot.img -v ${WORKDIR}/image-version-info :: 164 165 # Deploy vfat partition 166 if [ "${SDIMG_VFAT_DEPLOY}" = "1" ]; then 167 cp ${WORKDIR}/boot.img ${IMGDEPLOYDIR}/${SDIMG_VFAT} 168 ln -sf ${SDIMG_VFAT} ${SDIMG_LINK_VFAT} 169 fi 170 171 # Burn Partitions 172 dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) 173 # If SDIMG_ROOTFS_TYPE is a .xz file use xzcat 174 if echo "${SDIMG_ROOTFS_TYPE}" | egrep -q "*\.xz" 175 then 176 xzcat ${SDIMG_ROOTFS} | dd of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) 177 else 178 dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) 179 fi 180 181 # Optionally apply compression 182 case "${SDIMG_COMPRESSION}" in 183 "gzip") 184 gzip -k9 "${SDIMG}" 185 ;; 186 "bzip2") 187 bzip2 -k9 "${SDIMG}" 188 ;; 189 "xz") 190 xz -k "${SDIMG}" 191 ;; 192 esac 193} 194 195ROOTFS_POSTPROCESS_COMMAND += " rpi_generate_sysctl_config ; " 196 197rpi_generate_sysctl_config() { 198 # systemd sysctl config 199 test -d ${IMAGE_ROOTFS}${sysconfdir}/sysctl.d && \ 200 echo "vm.min_free_kbytes = 8192" > ${IMAGE_ROOTFS}${sysconfdir}/sysctl.d/rpi-vm.conf 201 202 # sysv sysctl config 203 IMAGE_SYSCTL_CONF="${IMAGE_ROOTFS}${sysconfdir}/sysctl.conf" 204 test -e ${IMAGE_ROOTFS}${sysconfdir}/sysctl.conf && \ 205 sed -e "/vm.min_free_kbytes/d" -i ${IMAGE_SYSCTL_CONF} 206 echo "" >> ${IMAGE_SYSCTL_CONF} && echo "vm.min_free_kbytes = 8192" >> ${IMAGE_SYSCTL_CONF} 207} 208