R818 Linux自定义分区

1.在 sys_partition.fex 文件里添加分区表信息

device/config/chips/r818/configs/evb1/linux/sys_partition.fex

# sys_partition.fex其中添加
[partition]
    name         = oem
    size         = 512
    downloadfile = "oem_s.fex"
    user_type    = 0x8000

2.在 fstab 里添加挂载配置信息

target/allwinner/r818-evb1/base-files/etc/config/fstab

# fstab相应添加 ， 自动挂载
config 'mount'
    option target '/oem'
    option device '/dev/by-name/oem'
    option options 'rw,async'
    option enabled '1'

3.在启动脚本里添加检测操作， 没有挂载的话就格式化再挂载

package/base-files/files/lib/preinit/79_format_partition

# 在启动脚本里添加检测操作， 没有挂载的话就格式化再挂载
# 79_format_partition 在方法do_format_filesystem()中添加
do_format_filesystem()
{
    ....    
+   do_check_format /dev/by-name/oem
    do_check_format /dev/by-name/UDISK
    do_check_format /dev/by-name/rootfs_data
    [ -h /dev/by-name/sec_storage ] && do_check_format /dev/by-name/sec_storage
}

4.在Makefile中添加对应的节点

package/base-files/Makefile

# 在Makefile中添加注册
  mkdir -p $(1)/tmp
+ mkdir -p $(1)/oem
  mkdir -p $(1)/robotdata
  mkdir -p $(1)/usr/lib

5.在 script 目录下的 pack_img.sh 脚本里添加制作需要 download 的文件系统的脚本:

scripts/pack_img.sh

function make_oem_res() {
    mkdir ${PACK_TOPDIR}/out/${TARGET_BOARD}/compile_dir/target/oem
    cd ${ROOT_DIR}/image
    local DATA_PART_NAME=oem
    cp $1 sys_partition_tmp_oem.fex

    sed -i '/^[ \t]*downloadfile/d' sys_partition_tmp_oem.fex
    /bin/busybox unix2dos sys_partition_tmp_oem.fex
    script sys_partition_tmp_oem.fex > /dev/null
    update_mbr sys_partition_tmp_oem.bin 1 sunxi_mbr_tmp_oem.fex > /dev/null

    local DATA_PART_DOWNLOAD_FILE=oem.fex
    local DATA_PART_DOWNLOAD_FILE_SPARSE=oem_s.fex
    local DATA_PART_FILE_PATH=${PACK_TOPDIR}/out/${TARGET_BOARD}/compile_dir/target/oem
    local DATA_PART_SIZE_IN_SECTOR=$(parser_mbr sunxi_mbr_tmp_oem.fex get_size_by_name ${DATA_PART_NAME})
    # local DATA_PART_SIZE_IN_SECTOR=`parser_mbr sunxi_mbr_tmp_oem.fex get_size_by_name ${DATA_PART_NAME}`

    echo "DATA_PART_SIZE_IN_SECTOR = ${DATA_PART_SIZE_IN_SECTOR}"

    if [ x${DATA_PART_DOWNLOAD_FILE} != x'' -a x${DATA_PART_SIZE_IN_SECTOR} != x'0' ]; then
        let DATA_PART_SIZE_IN_K=$DATA_PART_SIZE_IN_SECTOR/2
        #let DATA_PART_SIZE_IN_K=$DATA_PART_SIZE_IN_SECTOR*2
        echo "PACK_TOPDIR = ${PACK_TOPDIR}"
        rm -f ${ROOT_DIR}/image/${DATA_PART_DOWNLOAD_FILE}
        rm -f ${ROOT_DIR}/image/${DATA_PART_DOWNLOAD_FILE_SPARSE}
        ${PACK_TOPDIR}/out/host/bin/make_ext4fs -l ${DATA_PART_SIZE_IN_K}k -b 1024 -m 0 -j 1024 ${ROOT_DIR}/image/${DATA_PART_DOWNLOAD_FILE} ${DATA_PART_FILE_PATH}
        echo "DATA_PART_SIZE_IN_K = ${DATA_PART_SIZE_IN_K}"
        echo "ROOT_DIR = ${ROOT_DIR}"
        echo "DATA_PART_DOWNLOAD_FILE = ${ROOT_DIR}/image/${DATA_PART_DOWNLOAD_FILE}"
        echo "DATA_PART_FILE_PATH = ${DATA_PART_FILE_PATH}"
        sparse_ext4 ${ROOT_DIR}/image/${DATA_PART_DOWNLOAD_FILE} ${ROOT_DIR}/image/${DATA_PART_DOWNLOAD_FILE_SPARSE}
    else
        printf "no oem resource partitions\n"
    fi
    cd - > /dev/null
}

# 函数写完，在下面仿照 make_data_res 添加到
make_swu_res ${ROOT_DIR}/image/sys_partition_nor.fex
make_oem_res ${ROOT_DIR}/image/sys_partition.fex

image.png