2 inherit linux-raspberrypi-base
5 # Create an image that can by written onto a SD card using dd.
7 # The disk layout used is:
9 # 0 -> IMAGE_ROOTFS_ALIGNMENT - reserved for other data
10 # IMAGE_ROOTFS_ALIGNMENT -> BOOT_SPACE - bootloader and kernel
11 # BOOT_SPACE -> SDIMG_SIZE - rootfs
14 # Default Free space = 1.3x
15 # Use IMAGE_OVERHEAD_FACTOR to add more space
17 # 4MiB 40MiB SDIMG_ROOTFS
18 # <-----------------------> <----------> <---------------------->
19 # ------------------------ ------------ ------------------------
20 # | IMAGE_ROOTFS_ALIGNMENT | BOOT_SPACE | ROOTFS_SIZE |
21 # ------------------------ ------------ ------------------------
24 # 0 4MiB 4MiB + 40MiB 4MiB + 40Mib + SDIMG_ROOTFS
26 # This image depends on the rootfs image
27 IMAGE_TYPEDEP_rpi-sdimg = "${SDIMG_ROOTFS_TYPE}"
29 # Set kernel and boot loader
30 IMAGE_BOOTLOADER ?= "bcm2835-bootfiles"
32 # Set initramfs extension
33 KERNEL_INITRAMFS ?= ""
36 SDIMG_KERNELIMAGE_raspberrypi ?= "kernel.img"
37 SDIMG_KERNELIMAGE_raspberrypi2 ?= "kernel7.img"
38 SDIMG_KERNELIMAGE_raspberrypi3-64 ?= "kernel8.img"
40 # Boot partition volume id
41 BOOTDD_VOLUME_ID ?= "${MACHINE}"
43 # Boot partition size [in KiB] (will be rounded up to IMAGE_ROOTFS_ALIGNMENT)
46 # Set alignment to 4MB [in KiB]
47 IMAGE_ROOTFS_ALIGNMENT = "4096"
49 # Use an uncompressed ext3 by default as rootfs
50 SDIMG_ROOTFS_TYPE ?= "ext3"
51 SDIMG_ROOTFS = "${IMGDEPLOYDIR}/${IMAGE_NAME}.rootfs.${SDIMG_ROOTFS_TYPE}"
53 IMAGE_DEPENDS_rpi-sdimg = " \
57 virtual/kernel:do_deploy \
59 ${@bb.utils.contains('KERNEL_IMAGETYPE', 'uImage', 'u-boot', '',d)} \
63 SDIMG = "${IMGDEPLOYDIR}/${IMAGE_NAME}.rootfs.rpi-sdimg"
65 # Compression method to apply to SDIMG after it has been created. Supported
66 # compression formats are "gzip", "bzip2" or "xz". The original .rpi-sdimg file
67 # is kept and a new compressed file is created if one of these compression
68 # formats is chosen. If SDIMG_COMPRESSION is set to any other value it is
70 #SDIMG_COMPRESSION ?= ""
72 # Additional files and/or directories to be copied into the vfat partition from the IMAGE_ROOTFS.
75 IMAGE_CMD_rpi-sdimg () {
78 BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE} + ${IMAGE_ROOTFS_ALIGNMENT} - 1)
79 BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE_ALIGNED} - ${BOOT_SPACE_ALIGNED} % ${IMAGE_ROOTFS_ALIGNMENT})
80 SDIMG_SIZE=$(expr ${IMAGE_ROOTFS_ALIGNMENT} + ${BOOT_SPACE_ALIGNED} + $ROOTFS_SIZE)
82 echo "Creating filesystem with Boot partition ${BOOT_SPACE_ALIGNED} KiB and RootFS $ROOTFS_SIZE KiB"
84 # Check if we are building with device tree support
87 # Initialize sdcard image file
88 dd if=/dev/zero of=${SDIMG} bs=1024 count=0 seek=${SDIMG_SIZE}
90 # Create partition table
91 parted -s ${SDIMG} mklabel msdos
92 # Create boot partition and mark it as bootable
93 parted -s ${SDIMG} unit KiB mkpart primary fat32 ${IMAGE_ROOTFS_ALIGNMENT} $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT})
94 parted -s ${SDIMG} set 1 boot on
95 # Create rootfs partition to the end of disk
96 parted -s ${SDIMG} -- unit KiB mkpart primary ext2 $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) -1s
99 # Create a vfat image with boot files
100 BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }')
101 rm -f ${WORKDIR}/boot.img
102 mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
103 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/* ::/
104 if test -n "${DTS}"; then
105 # 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
106 DT_OVERLAYS="${@split_overlays(d, 0)}"
107 DT_ROOT="${@split_overlays(d, 1)}"
109 # Copy board device trees to root folder
110 for DTB in ${DT_ROOT}; do
111 DTB_BASE_NAME=`basename ${DTB} .dtb`
113 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${DTB_BASE_NAME}.dtb ::${DTB_BASE_NAME}.dtb
116 # Copy device tree overlays to dedicated folder
117 mmd -i ${WORKDIR}/boot.img overlays
118 for DTB in ${DT_OVERLAYS}; do
120 DTB_BASE_NAME=`basename ${DTB} ."${DTB_EXT}"`
122 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${DTB_BASE_NAME}.${DTB_EXT} ::overlays/${DTB_BASE_NAME}.${DTB_EXT}
125 case "${KERNEL_IMAGETYPE}" in
127 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/u-boot.bin ::${SDIMG_KERNELIMAGE}
128 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin ::uImage
129 mcopy -o -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/boot.scr ::boot.scr
132 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin ::${SDIMG_KERNELIMAGE}
136 if [ -n ${FATPAYLOAD} ] ; then
137 echo "Copying payload into VFAT"
138 for entry in ${FATPAYLOAD} ; do
139 # add the || true to stop aborting on vfat issues like not supporting .~lock files
140 mcopy -i ${WORKDIR}/boot.img -s -v ${IMAGE_ROOTFS}$entry :: || true
145 echo "${IMAGE_NAME}" > ${WORKDIR}/image-version-info
146 mcopy -i ${WORKDIR}/boot.img -v ${WORKDIR}/image-version-info ::
149 dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
150 # If SDIMG_ROOTFS_TYPE is a .xz file use xzcat
151 if echo "${SDIMG_ROOTFS_TYPE}" | egrep -q "*\.xz"
153 xzcat ${SDIMG_ROOTFS} | dd of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
155 dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
158 # Optionally apply compression
159 case "${SDIMG_COMPRESSION}" in
172 ROOTFS_POSTPROCESS_COMMAND += " rpi_generate_sysctl_config ; "
174 rpi_generate_sysctl_config() {
175 # systemd sysctl config
176 test -d ${IMAGE_ROOTFS}${sysconfdir}/sysctl.d && \
177 echo "vm.min_free_kbytes = 8192" > ${IMAGE_ROOTFS}${sysconfdir}/sysctl.d/rpi-vm.conf
180 IMAGE_SYSCTL_CONF="${IMAGE_ROOTFS}${sysconfdir}/sysctl.conf"
181 test -e ${IMAGE_ROOTFS}${sysconfdir}/sysctl.conf && \
182 sed -e "/vm.min_free_kbytes/d" -i ${IMAGE_SYSCTL_CONF}
183 echo "" >> ${IMAGE_SYSCTL_CONF} && echo "vm.min_free_kbytes = 8192" >> ${IMAGE_SYSCTL_CONF}