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在sdk的根目录下有自动化脚本build.sh,build.sh里面定义了emmc-img的功能函数。
function build_emmcimg() { local IMG= local ROOTFS= #如果OSNAME未定义,则定义为buildroot if [ -z ${OS_NAME} ]; then OS_NAME=buildroot fi if [ x${OS_NAME} = xbuildroot ]; then IMG=rk3399-eflasher-buildroot-linux-4.4-arm64-$(date +%Y%m%d).img ROOTFS=${TOP_DIR}/buildroot/output/rockchip_rk3399/images/rootfs.ext2 elif [ x${OS_NAME} = xdebian ]; then IMG=rk3399-eflasher-debian9-4.4-armhf-$(date +%Y%m%d).img ROOTFS=${TOP_DIR}/rootfs/binary else echo "Unknow OS: ${OS_NAME}" exit 1 fi prepare_image_for_friendlyelec_eflasher ${OS_NAME} ${ROOTFS} && (cd ${SDFUSE_DIR} && ./mk-emmc-image.sh ${OS_NAME}) && { echo "-----------------------------------------" echo "Run the following for sdcard install:" echo " dd if=out/${IMG} of=/dev/sdX bs=1M" echo "-----------------------------------------" } }
显然,在emmc-img函数里面真正起作用的是prepare_image_for_friendlyelec_eflasher函数,该函数同样在build.sh里面定义。
function copy_and_verify(){ if [ ! -f $1 ]; then echo "not found: $1" echo "$3" exit 1 fi cp $1 $2 } function prepare_image_for_friendlyelec_eflasher(){ local OS_DIR=$1 local ROOTFS=$2 ###如果pwd/friendlyelec/rk3399/sd-fuse_rk3399/buildroot目录不存在就创建一个 if [ ! -d ${SDFUSE_DIR}/${OS_DIR} ]; then mkdir ${SDFUSE_DIR}/${OS_DIR} fi ###存在就清空目录下已经存在的文件 rm -rf ${SDFUSE_DIR}/${OS_DIR}/* ############################### ###将已经编译出来的img文件重命名并拷贝到${SDFUSE_DIR}/${OS_DIR}#### ############################### copy_and_verify $TOP_DIR/u-boot/rk3399_loader_v1.22.119.bin ${SDFUSE_DIR}/${OS_DIR}/MiniLoaderAll.bin "error: please build uboot first." copy_and_verify $TOP_DIR/u-boot/uboot.img ${SDFUSE_DIR}/${OS_DIR} "error: please build uboot first." copy_and_verify $TOP_DIR/u-boot/trust.img ${SDFUSE_DIR}/${OS_DIR} "error: please build uboot first." copy_and_verify $TOP_DIR/kernel/kernel.img ${SDFUSE_DIR}/${OS_DIR} "error: please build kernel first." copy_and_verify $TOP_DIR/kernel/resource.img ${SDFUSE_DIR}/${OS_DIR} "error: please build kernel first." ############################### ######## ramdisk ######## ###SDFUSE_DIR=pwd/friendlyelec/rk3399/sd-fuse_rk3399 ############################### copy_and_verify ${SDFUSE_DIR}/prebuilt/idbloader.img ${SDFUSE_DIR}/${OS_DIR} "" copy_and_verify ${SDFUSE_DIR}/prebuilt/boot.img ${SDFUSE_DIR}/${OS_DIR} "" ############################### ######## custom rootfs ######## ############################### FA_TMP_DIR=$TOP_DIR/friendlyelec/tmp-rootfs rm -rf $FA_TMP_DIR mkdir -p $FA_TMP_DIR if [ -f ${ROOTFS} ]; then mkdir -p $FA_TMP_DIR/mnt copy_and_verify ${ROOTFS} $FA_TMP_DIR/rootfs-org.img "error: please build rootfs first." mount -t ext4 -o loop $FA_TMP_DIR/rootfs-org.img $FA_TMP_DIR/mnt mkdir $FA_TMP_DIR/rootfs cp -af $FA_TMP_DIR/mnt/* $FA_TMP_DIR/rootfs umount $FA_TMP_DIR/mnt rm -rf $FA_TMP_DIR/mnt elif [ -d ${ROOTFS} ]; then mkdir $FA_TMP_DIR/rootfs echo "Coping rootfs ..." cp -af ${ROOTFS}/* $FA_TMP_DIR/rootfs clean_device_files $FA_TMP_DIR/rootfs else echo "error: please build rootfs first." exit 1 fi cat << 'EOL' > $FA_TMP_DIR/rootfs/etc/fstab # <file system> <mount pt> <type> <options> <dump> <pass> proc /proc proc defaults 0 0 devpts /dev/pts devpts defaults,gid=5,mode=620 0 0 tmpfs /dev/shm tmpfs mode=0777 0 0 tmpfs /tmp tmpfs mode=1777 0 0 tmpfs /run tmpfs mode=0755,nosuid,nodev 0 0 sysfs /sys sysfs defaults 0 0 debug /sys/kernel/debug debugfs defaults 0 0 pstore /sys/fs/pstore pstore defaults 0 0 EOL #kernel modules KER_MODULES_OUTDIR=/tmp/output_rk3399_kmodules mkdir -p $FA_TMP_DIR/rootfs/lib/modules if [ -d $KER_MODULES_OUTDIR/lib/modules ]; then cp -af $KER_MODULES_OUTDIR/lib/modules/* $FA_TMP_DIR/rootfs/lib/modules/ else echo "error: please build kernel first." exit 1 fi #fs-overlay rsync -a --exclude='.git' $TOP_DIR/friendlyelec/rk3399/fs-overlay-64/* $FA_TMP_DIR/rootfs/ # oem [ -d $FA_TMP_DIR/rootfs/oem ] || mkdir $FA_TMP_DIR/rootfs/oem cp -af $TOP_DIR/device/rockchip/oem/oem_normal/* $FA_TMP_DIR/rootfs/oem # userdata [ -d $FA_TMP_DIR/rootfs/userdata ] || mkdir $FA_TMP_DIR/rootfs/userdata cp -af $TOP_DIR/device/rockchip/userdata/userdata_normal/* $FA_TMP_DIR/rootfs/userdata # misc rm -f $FA_TMP_DIR/rootfs/misc mkdir $FA_TMP_DIR/rootfs/misc # remove /dev/console rm -f $FA_TMP_DIR/rootfs/dev/console MKFS=${SDFUSE_DIR}/tools/make_ext4fs ROOT=${FA_TMP_DIR}/rootfs # calc image size ROOTFS_SIZE=`du -s -B 1 ${ROOT} | cut -f1` MAX_IMG_SIZE=7100000000 TMPFILE=`tempfile` ${MKFS} -s -l ${MAX_IMG_SIZE} -a root -L rootfs /dev/null ${ROOT} > ${TMPFILE} IMG_SIZE=`cat ${TMPFILE} | grep "Suggest size:" | cut -f2 -d ':' | awk '{gsub(/^\s+|\s+$/, "");print}'` cat $TMPFILE rm -f ${TMPFILE} if [ ${ROOTFS_SIZE} -gt ${IMG_SIZE} ]; then pt_error "IMG_SIZE less than ROOTFS_SIZE, why?" exit 1 fi # make rootfs.img ${MKFS} -s -l ${IMG_SIZE} -a root -L rootfs $FA_TMP_DIR/rootfs.img ${ROOT} copy_and_verify $FA_TMP_DIR/rootfs.img ${SDFUSE_DIR}/${OS_DIR}/rootfs.img " " rm -rf $FA_TMP_DIR # fill size to parameter.txt and partmap.txt ROOTFS_PARTITION_SIZE=`printf "0x%X" $(($IMG_SIZE/512))` ROOTFS_PARTITION_ADDR=0x00030000 USERDATA_PARTITION_ADDR=`printf "0x%X" $((${ROOTFS_PARTITION_ADDR}+${ROOTFS_PARTITION_SIZE}))` ############################### ######## parameter.txt ######## ############################### cat > ${SDFUSE_DIR}/${OS_DIR}/parameter.txt << EOL FIRMWARE_VER: 6.0.1 MACHINE_MODEL: RK3399 MACHINE_ID: 007 MANUFACTURER: RK3399 MAGIC: 0x5041524B ATAG: 0x00200800 MACHINE: 3399 CHECK_MASK: 0x80 PWR_HLD: 0,0,A,0,1 #KERNEL_IMG: 0x00280000 #FDT_NAME: rk-kernel.dtb #RECOVER_KEY: 1,1,0,20,0 #in section; per section 512(0x200) bytes CMDLINE: root=/dev/mmcblk1p7 rw rootfstype=ext4 data=/dev/mmcblk1p8 consoleblank=0 mtdparts=rk29xxnand:0x00002000@0x00002000(uboot),0x00002000@0x00004000(trust),0x00002000@0x00006000(misc),0x00006000@0x00008000(resource),0x00010000@0x0000e000(kernel),0x00010000@0x0001e000(boot),${ROOTFS_PARTITION_SIZE}@0x00030000(rootfs),-@${USERDATA_PARTITION_ADDR}(userdata) EOL mkdir -p ${SDFUSE_DIR}/${OS_DIR}/sd-boot ########################################################## ######## param4sd.txt (parameter.txt for sd-boot) ######## ########################################################## cat > ${SDFUSE_DIR}/${OS_DIR}/sd-boot/param4sd.txt << EOL FIRMWARE_VER: 6.0.1 MACHINE_MODEL: RK3399 MACHINE_ID: 007 MANUFACTURER: RK3399 MAGIC: 0x5041524B ATAG: 0x00200800 MACHINE: 3399 CHECK_MASK: 0x80 PWR_HLD: 0,0,A,0,1 #KERNEL_IMG: 0x00280000 #FDT_NAME: rk-kernel.dtb #RECOVER_KEY: 1,1,0,20,0 #in section; per section 512(0x200) bytes CMDLINE: root=/dev/mmcblk0p1 rw rootfstype=ext4 data=/dev/mmcblk0p2 consoleblank=0 mtdparts=rk29xxnand:0x00002000@0x00002000(uboot),0x00002000@0x00004000(trust),0x00002000@0x00006000(misc),0x00006000@0x00008000(resource),0x00010000@0x0000e000(kernel),0x00010000@0x0001e000(boot),${ROOTFS_PARTITION_SIZE}@0x00030000(rootfs),-@${USERDATA_PARTITION_ADDR}(userdata) EOL ROOTFS_PARTITION_SIZE=`printf "0x%X" ${IMG_SIZE}` ROOTFS_PARTITION_ADDR=0x6000000 USERDATA_PARTITION_ADDR=`printf "0x%X" $((${ROOTFS_PARTITION_ADDR}+${ROOTFS_PARTITION_SIZE}))` ######################################### ######## partmap.txt for sd-boot ######## ######################################### cat > ${SDFUSE_DIR}/${OS_DIR}/sd-boot/partmap.txt << EOL flash=mmc,1:loader:idb:0x8000,0x280000:idbloader.img; flash=mmc,1:env:env:0x3F8000,0x8000; flash=mmc,1:parm:parm:0x400000,0x0400000:param4sd.txt; flash=mmc,1:uboot:raw:0x800000,0x0400000:uboot.img; flash=mmc,1:trust:raw:0xC00000,0x0400000:trust.img; flash=mmc,1:misc:raw:0x1000000,0x0400000; flash=mmc,1:resc:raw:0x1400000,0x0C00000:resource.img; flash=mmc,1:kern:raw:0x2000000,0x2000000:kernel.img; flash=mmc,1:boot:raw:0x4000000,0x2000000:boot.img; flash=mmc,1:rootfs:ext4:0x6000000,${ROOTFS_PARTITION_SIZE}:rootfs.img; flash=mmc,1:userdata:ext4:${USERDATA_PARTITION_ADDR},0x0:userdata.img; EOL # gen empty userdata.img if [ ! -f ${SDFUSE_DIR}/${OS_DIR}/userdata.img ]; then USERDATA_SIZE=104857600 TMPDIR=`mktemp -d` ${MKFS} -s -l ${USERDATA_SIZE} -a root -L userdata ${SDFUSE_DIR}/${OS_DIR}/userdata.img ${TMPDIR} rm -rf ${TMPDIR} fi }
在prepare_image_for_friendlyelec_eflasher函数中,kernel编译出来的boot.img不能用,而是选择${SDFUSE_DIR}/prebuilt/boot.img。
创建分区文件的操作是
cat > $ {SDFUSE_DIR}/$ {OS_DIR}/parameter.txt << EOL
…
EOL
显然可以改变的只有根文件的大小ROOTFS_PARTITION_SIZE和userdata分区起始地址USERDATA_PARTITION_ADDR。
如果是自己编译的根文件系统,需要修改ROOTFS_PARTITION_SIZE的大小,然后对应修改USERDATA_PARTITION_ADDR的值。
1、下载rootfs显示失败时,可能是rootfs.img的大小超过分区的大小,修改ROOTFS_PARTITION_SIZE和userdata和USERDATA_PARTITION_ADDR。
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