diff --git a/build/boards/cv180x/cv1800b_milkv_duo_sd/cv1800b_milkv_duo_sd_defconfig b/build/boards/cv180x/cv1800b_milkv_duo_sd/cv1800b_milkv_duo_sd_defconfig
index 5489e1ccd..12ed56b7a 100644
--- a/build/boards/cv180x/cv1800b_milkv_duo_sd/cv1800b_milkv_duo_sd_defconfig
+++ b/build/boards/cv180x/cv1800b_milkv_duo_sd/cv1800b_milkv_duo_sd_defconfig
@@ -37,4 +37,5 @@ CONFIG_ENABLE_RTOS_DUMP_PRINT=y
 CONFIG_DUMP_PRINT_SZ_IDX=17
 CONFIG_USE_4K_ERASE_SIZE_FOR_JFFS2=y
 CONFIG_USB_OSDRV_CVITEK_GADGET=n
+CONFIG_BUILDROOT_FS=y
 CONFIG_BUILD_FOR_DEBUG=y
diff --git a/build/milkvsetup.sh b/build/milkvsetup.sh
new file mode 100644
index 000000000..4e291c644
--- /dev/null
+++ b/build/milkvsetup.sh
@@ -0,0 +1,589 @@
+#!/bin/bash
+function _build_default_env()
+{
+  # Please keep these default value!!!
+  BRAND=${BRAND:-cvitek}
+  DEBUG=${DEBUG:-0}
+  RELEASE_VERSION=${RELEASE_VERSION:-0}
+  BUILD_VERBOSE=${BUILD_VERBOSE:-1}
+  ATF_BL32=${ATF_BL32:-1}
+  UBOOT_VBOOT=${UBOOT_VBOOT:-0}
+  COMPRESSOR=${COMPRESSOR:-xz}
+  COMPRESSOR_UBOOT=${COMPRESSOR_UBOOT:-lzma} # or none to disable
+  MULTI_PROCESS_SUPPORT=${MULTI_PROCESS_SUPPORT:-0}
+  ENABLE_BOOTLOGO=${ENABLE_BOOTLOGO:-0}
+  TPU_REL=${TPU_REL:-0} # TPU release build
+  SENSOR=${SENSOR:-sony_imx327}
+}
+
+function gettop()
+{
+  local TOPFILE=build/cvisetup.sh
+  if [ -n "$TOP" -a -f "$TOP/$TOPFILE" ] ; then
+    # The following circumlocution ensures we remove symlinks from TOP.
+    (cd "$TOP"; PWD= /bin/pwd)
+  else
+    if [ -f $TOPFILE ] ; then
+      # The following circumlocution (repeated below as well) ensures
+      # that we record the true directory name and not one that is
+      # faked up with symlink names.
+      PWD= /bin/pwd
+    else
+      local HERE=$PWD
+      T=
+      while [ \( ! \( -f $TOPFILE \) \) -a \( $PWD != "/" \) ]; do
+        \cd ..
+	T=$(PWD= /bin/pwd -P)
+      done
+      \cd "$HERE"
+      if [ -f "$T/$TOPFILE" ]; then
+        echo "$T"
+      fi
+    fi
+  fi
+}
+
+function _build_fsbl_env()
+{
+  export FSBL_PATH
+}
+
+function build_fsbl()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_uboot_env
+  _build_opensbi_env
+  cd "$BUILD_PATH" || return
+  make fsbl-build
+)}
+
+function clean_fsbl()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_uboot_env
+  cd "$BUILD_PATH" || return
+  make fsbl-clean
+)}
+
+function _build_atf_env()
+{
+  export ATF_BL32 FAKE_BL31_32
+}
+
+function build_atf()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_atf_env
+  cd "$BUILD_PATH" || return
+  make arm-trusted-firmware
+)}
+
+function clean_atf()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_atf_env
+  cd "$BUILD_PATH" || return
+  make arm-trusted-firmware-clean
+)}
+
+function _build_uboot_env()
+{
+  _build_atf_env
+  _build_fsbl_env
+  export UBOOT_OUTPUT_FOLDER IMGTOOL_PATH FLASH_PARTITION_XML FIP_BIN_PATH
+  export UBOOT_VBOOT RELEASE_VERSION ENABLE_BOOTLOGO STORAGE_TYPE COMPRESSOR_UBOOT
+  export PANEL_TUNING_PARAM PANEL_LANE_NUM_TUNING_PARAM PANEL_LANE_SWAP_TUNING_PARAM
+}
+
+function build_fip_pre()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_uboot_env
+  cd "$BUILD_PATH" || return
+  make fip-pre-merge
+)}
+
+function build_rtos()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  cd "$BUILD_PATH" || return
+  make rtos
+)}
+
+function clean_rtos()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  cd "$BUILD_PATH" || return
+  make rtos-clean
+)}
+
+function menuconfig_uboot()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_uboot_env
+  cd "$BUILD_PATH" || return
+  make u-boot-menuconfig || return "$?"
+)}
+
+function _link_uboot_logo()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  cd "$BUILD_PATH" || return
+  if [[ x"${PANEL_TUNING_PARAM}" =~ x"I80" ]]; then
+    ln -sf "$COMMON_TOOLS_PATH"/bootlogo/logo_320x240.BMP "$COMMON_TOOLS_PATH"/bootlogo/logo.jpg
+  fi
+)}
+
+function build_uboot()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_uboot_env
+  _build_opensbi_env
+  _link_uboot_logo
+
+  cd "$BUILD_PATH" || return
+  [[ "$CHIP_ARCH" == CV182X ]] || [[ "$CHIP_ARCH" == CV183X ]] && \
+    cp -f "$OUTPUT_DIR"/fip_pre/fip_pre_${ATF_KEY_SEL}.bin \
+    "$OUTPUT_DIR"/fip_pre/fip_pre.bin
+
+  make u-boot
+)}
+
+function build_uboot_env_tools()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_uboot_env
+  cd "$BUILD_PATH" || return
+  make u-boot-env-tools
+)}
+
+function clean_uboot()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_uboot_env
+  cd "$BUILD_PATH" || return
+  make u-boot-clean
+)}
+
+function _build_kernel_env()
+{
+  export KERNEL_OUTPUT_FOLDER RAMDISK_OUTPUT_FOLDER SYSTEM_OUT_DIR
+}
+
+function menuconfig_kernel()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_kernel_env
+  cd "$BUILD_PATH" || return
+  make kernel-menuconfig || return "$?"
+)}
+
+function setconfig_kernel()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_kernel_env
+  cd "$BUILD_PATH" || return
+  make kernel-setconfig "SCRIPT_ARG=$1" || return "$?"
+)}
+
+# shellcheck disable=SC2120
+function build_kernel()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_kernel_env
+  cd "$BUILD_PATH" || return
+  make kernel || return "$?"
+
+  # generate boot.itb image.
+  if [[ ${1} != noitb ]]; then
+    pack_boot || return "$?"
+  fi
+)}
+
+function clean_kernel()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_kernel_env
+  cd "$BUILD_PATH" || return
+  make kernel-clean
+)}
+
+function build_bld()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  cd "$BUILD_PATH" || return
+  make bld
+)}
+
+function clean_bld()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  cd "$BUILD_PATH" || return
+  make bld-clean
+)}
+
+function _build_middleware_env()
+{
+  export MULTI_PROCESS_SUPPORT
+}
+
+function build_middleware()
+{(
+  print_notice "Run ${FUNCNAME[0]}() function"
+  _build_middleware_env
+  cd "$BUILD_PATH" || return
+
+  make "$ROOTFS_DIR"
+
+  mkdir -p "$SYSTEM_OUT_DIR"/usr/bin
+  mkdir -p "$SYSTEM_OUT_DIR"/lib
+
+  pushd $MW_PATH
+    rm -rf lib
+    if [ -d $(echo ${CHIP_ARCH} | tr A-Z a-z)/lib_"$SDK_VER" ];
+    then
+        ln -s $(echo ${CHIP_ARCH} | tr A-Z a-z)/lib_"$SDK_VER" lib
+    else
+        ln -s lib_"$SDK_VER" lib
+    fi
+
+    if [ -d $(echo ${CHIP_ARCH} | tr A-Z a-z)/ko ];
+    then
+        rm -rf ko
+        ln -s $(echo ${CHIP_ARCH} | tr A-Z a-z)/ko ko
+    fi
+  popd
+
+  pushd "$MW_PATH"/component/isp
+    make all || return "$?"
+  popd
+
+  pushd "$MW_PATH"/sample
+    make all || return "$?"
+    find ./ -type f \( -iname "sample_*" ! -iname "*.*" \) -exec cp '{}' $SYSTEM_OUT_DIR/usr/bin \;
+  popd
+
+  # copy mw lib
+  cp -af "$MW_PATH"/lib/*.so*  "$SYSTEM_OUT_DIR"/lib
+  cp -af "$MW_PATH"/lib/3rd/*.so* "$SYSTEM_OUT_DIR"/lib
+  # copy ko
+  mkdir -p "$SYSTEM_OUT_DIR"/ko
+  if [[ "$BUILD_FOR_DEBUG" != "y" ]]; then
+  cp -af "$MW_PATH"/ko_shrink/* "$SYSTEM_OUT_DIR"/ko/
+  else
+  cp -af "$MW_PATH"/ko/* "$SYSTEM_OUT_DIR"/ko/
+  fi
+
+  # add sdk version
+  echo "SDK_VERSION=${SDK_VER}" > "$SYSTEM_OUT_DIR"/sdk-release
+)}
+
+
+function clean_middleware()
+{
+  print_notice "Run ${FUNCNAME[0]}() function "
+  pushd "$MW_PATH"/sample
+  make clean
+  popd
+  pushd "$MW_PATH"/component/isp
+  make clean
+  popd
+}
+
+function clean_ramdisk()
+{
+  rm -rf "${RAMDISK_PATH:?}"/"$RAMDISK_OUTPUT_BASE"
+  rm -rf "$SYSTEM_OUT_DIR"
+  rm -rf "$ROOTFS_DIR"
+}
+
+function build_all()
+{
+  # build bsp
+  build_uboot || return $?
+  build_kernel || return $?
+  build_middleware || return $?
+  pack_access_guard_turnkey_app || return $?
+  pack_ipc_turnkey_app || return $?
+  pack_boot || return $?
+  pack_cfg || return $?
+  pack_rootfs || return $?
+  pack_data
+  pack_system || return $?
+  copy_tools
+  pack_upgrade
+}
+
+function clean_all()
+{
+  clean_uboot
+  clean_kernel
+  clean_ramdisk
+  clean_middleware
+}
+
+# shellcheck disable=SC2120
+function envs_sdk_ver()
+{
+  if [ -n "$1" ]; then
+    SDK_VER="$1"
+  fi
+
+  if [ "$SDK_VER" = 64bit ]; then
+    CROSS_COMPILE="$CROSS_COMPILE_64"
+    CROSS_COMPILE_PATH="$CROSS_COMPILE_PATH_64"
+    SYSROOT_PATH="$SYSROOT_PATH_64"
+  elif [ "$SDK_VER" = 32bit ]; then
+    CROSS_COMPILE="$CROSS_COMPILE_32"
+    CROSS_COMPILE_PATH="$CROSS_COMPILE_PATH_32"
+    SYSROOT_PATH="$SYSROOT_PATH_32"
+  elif [ "$SDK_VER" = uclibc ]; then
+    CROSS_COMPILE="$CROSS_COMPILE_UCLIBC"
+    CROSS_COMPILE_PATH="$CROSS_COMPILE_PATH_UCLIBC"
+    SYSROOT_PATH="$SYSROOT_PATH_UCLIBC"
+  elif [ "$SDK_VER" = glibc_riscv64 ]; then
+    CROSS_COMPILE="$CROSS_COMPILE_GLIBC_RISCV64"
+    CROSS_COMPILE_PATH="$CROSS_COMPILE_PATH_GLIBC_RISCV64"
+    SYSROOT_PATH="$SYSROOT_PATH_GLIBC_RISCV64"
+  elif [ "$SDK_VER" = musl_riscv64 ]; then
+    CROSS_COMPILE="$CROSS_COMPILE_MUSL_RISCV64"
+    CROSS_COMPILE_PATH="$CROSS_COMPILE_PATH_MUSL_RISCV64"
+    SYSROOT_PATH="$SYSROOT_PATH_MUSL_RISCV64"
+  else
+    echo -e "Invalid SDK_VER=${SDK_VER}"
+    exit 1
+  fi
+
+  TPU_OUTPUT_PATH="$OUTPUT_DIR"/tpu_"$SDK_VER"
+  # ramdisk packages PATH
+  pushd $BUILD_PATH || return $?
+  CVI_TARGET_PACKAGES_LIBDIR=$(make print-target-packages-libdir)
+  CVI_TARGET_PACKAGES_INCLUDE=$(make print-target-packages-include)
+  popd
+  export CVI_TARGET_PACKAGES_LIBDIR
+  export CVI_TARGET_PACKAGES_INCLUDE
+
+  OSS_TARBALL_PATH="$TPU_OUTPUT_PATH"/third_party
+  TPU_SDK_INSTALL_PATH="$TPU_OUTPUT_PATH"/cvitek_tpu_sdk
+  IVE_SDK_INSTALL_PATH="$TPU_OUTPUT_PATH"/cvitek_ive_sdk
+  IVS_SDK_INSTALL_PATH="$TPU_OUTPUT_PATH"/cvitek_ivs_sdk
+  AI_SDK_INSTALL_PATH="$TPU_OUTPUT_PATH"/cvitek_ai_sdk
+  CNV_SDK_INSTALL_PATH="$TPU_OUTPUT_PATH"/cvitek_cnv_sdk
+  TPU_MODEL_PATH="$TPU_OUTPUT_PATH"/models
+  IVE_CMODEL_INSTALL_PATH="$TPU_OUTPUT_PATH"/tools/ive_cmodel
+}
+
+function cvi_setup_env()
+{
+  local _tmp ret
+
+  _build_default_env
+
+  _tmp=$(python3 "${TOP_DIR}/build/scripts/boards_scan.py" --gen-board-env="${CHIP}_${BOARD}")
+  ret=$?
+  [[ "$ret" == 0 ]] || return "$ret"
+
+  # shellcheck disable=SC1090
+  source <(echo "${_tmp}")
+
+  if [[ "$CHIP_ARCH" == "CV183X" ]];then
+  export  CVIARCH="CV183X"
+  fi
+  if [[ "$CHIP_ARCH" == "CV182X" ]];then
+  export  CVIARCH="CV182X"
+  fi
+  if [[ "$CHIP_ARCH" == "CV181X" ]];then
+  export  CVIARCH="CV181X"
+  fi
+  if [[ "$CHIP_ARCH" == "CV180X" ]];then
+  export  CVIARCH="CV180X"
+  fi
+
+  export BRAND BUILD_VERBOSE DEBUG PROJECT_FULLNAME
+  export OUTPUT_DIR ATF_PATH BM_BLD_PATH OPENSBI_PATH UBOOT_PATH FREERTOS_PATH
+  export KERNEL_PATH RAMDISK_PATH OSDRV_PATH TOOLS_PATH COMMON_TOOLS_PATH
+
+  PROJECT_FULLNAME="$CHIP"_"$BOARD"
+
+  # output folder path
+  INSTALL_PATH="$TOP_DIR"/install
+  OUTPUT_DIR="$INSTALL_PATH"/soc_"$PROJECT_FULLNAME"
+  ROOTFS_DIR="$OUTPUT_DIR"/rootfs
+  SYSTEM_OUT_DIR="$OUTPUT_DIR"/rootfs/mnt/system
+
+  # source file folders
+  FSBL_PATH="$TOP_DIR"/fsbl
+  ATF_PATH="$TOP_DIR"/arm-trusted-firmware
+  UBOOT_PATH="$TOP_DIR/$UBOOT_SRC"
+  FREERTOS_PATH="$TOP_DIR"/freertos
+  ALIOS_PATH="$TOP_DIR"/alios
+  KERNEL_PATH="$TOP_DIR"/"$KERNEL_SRC"
+  RAMDISK_PATH="$TOP_DIR"/ramdisk
+  BM_BLD_PATH="$TOP_DIR"/bm_bld
+  TOOLCHAIN_PATH="$TOP_DIR"/host-tools
+  OSS_PATH="$TOP_DIR"/oss
+  OPENCV_PATH="$TOP_DIR"/opencv
+  APPS_PATH="$TOP_DIR"/apps
+  MW_PATH="$TOP_DIR"/middleware/"$MW_VER"
+  ISP_TUNING_PATH="$TOP_DIR"/isp_tuning
+  TPU_SDK_PATH="$TOP_DIR"/cviruntime
+  IVE_SDK_PATH="$TOP_DIR"/ive
+  IVS_SDK_PATH="$TOP_DIR"/ivs
+  CNV_SDK_PATH="$TOP_DIR"/cnv
+  ACCESSGUARD_PATH="$TOP_DIR"/access-guard-turnkey
+  IPC_APP_PATH="$TOP_DIR"/framework/applications/ipc
+  AI_SDK_PATH="$TOP_DIR"/cviai
+  CVI_PIPELINE_PATH="$TOP_DIR"/cvi_pipeline
+  OPENSBI_PATH="$TOP_DIR"/opensbi
+  TOOLS_PATH="$BUILD_PATH"/tools
+  COMMON_TOOLS_PATH="$TOOLS_PATH"/common
+  VENC_PATH="$MW_PATH"/modules/venc
+  IMGTOOL_PATH="$COMMON_TOOLS_PATH"/image_tool
+  EMMCTOOL_PATH="$COMMON_TOOLS_PATH"/emmc_tool
+  SCRIPTTOOL_PATH="$COMMON_TOOLS_PATH"/scripts
+  ROOTFSTOOL_PATH="$COMMON_TOOLS_PATH"/rootfs_tool
+  SPINANDTOOL_PATH="$COMMON_TOOLS_PATH"/spinand_tool
+  BOOTLOGO_PATH="$COMMON_TOOLS_PATH"/bootlogo/logo.jpg
+
+  # subfolder path for buidling, chosen accroding to .gitignore rules
+  UBOOT_OUTPUT_FOLDER=build/"$PROJECT_FULLNAME"
+  RAMDISK_OUTPUT_BASE=build/"$PROJECT_FULLNAME"
+  KERNEL_OUTPUT_FOLDER=build/"$PROJECT_FULLNAME"
+  RAMDISK_OUTPUT_FOLDER="$RAMDISK_OUTPUT_BASE"/workspace
+
+  # toolchain
+  export CROSS_COMPILE_64=aarch64-linux-gnu-
+  export CROSS_COMPILE_32=arm-linux-gnueabihf-
+  export CROSS_COMPILE_UCLIBC=arm-cvitek-linux-uclibcgnueabihf-
+  export CROSS_COMPILE_64_NONOS=aarch64-elf-
+  export CROSS_COMPILE_64_NONOS_RISCV64=riscv64-unknown-elf-
+  export CROSS_COMPILE_GLIBC_RISCV64=riscv64-unknown-linux-gnu-
+  export CROSS_COMPILE_MUSL_RISCV64=riscv64-unknown-linux-musl-
+  export CROSS_COMPILE="$CROSS_COMPILE_64"
+
+  # toolchain path
+  CROSS_COMPILE_PATH_64="$TOOLCHAIN_PATH"/gcc/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu
+  CROSS_COMPILE_PATH_32="$TOOLCHAIN_PATH"/gcc/gcc-linaro-6.3.1-2017.05-x86_64_arm-linux-gnueabihf
+  CROSS_COMPILE_PATH_UCLIBC="$TOOLCHAIN_PATH"/gcc/arm-cvitek-linux-uclibcgnueabihf
+  CROSS_COMPILE_PATH_64_NONOS="$TOOLCHAIN_PATH"/gcc/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-elf
+  CROSS_COMPILE_PATH_64_NONOS_RISCV64="$TOOLCHAIN_PATH"/gcc/riscv64-elf-x86_64
+  CROSS_COMPILE_PATH_GLIBC_RISCV64="$TOOLCHAIN_PATH"/gcc/riscv64-linux-x86_64
+  CROSS_COMPILE_PATH_MUSL_RISCV64="$TOOLCHAIN_PATH"/gcc/riscv64-linux-musl-x86_64
+  CROSS_COMPILE_PATH="$CROSS_COMPILE_PATH_64"
+
+  # add toolchain path
+  pathprepend "$CROSS_COMPILE_PATH_64"/bin
+  pathprepend "$CROSS_COMPILE_PATH_32"/bin
+  pathprepend "$CROSS_COMPILE_PATH_64_NONOS"/bin
+  pathprepend "$CROSS_COMPILE_PATH_64_NONOS_RISCV64"/bin
+  pathprepend "$CROSS_COMPILE_PATH_GLIBC_RISCV64"/bin
+  pathprepend "$CROSS_COMPILE_PATH_MUSL_RISCV64"/bin
+  pathappend "$CROSS_COMPILE_PATH_UCLIBC"/bin
+
+  # sysroot
+  SYSROOT_PATH_64="$RAMDISK_PATH"/sysroot/sysroot-glibc-linaro-2.23-2017.05-aarch64-linux-gnu
+  SYSROOT_PATH_32="$RAMDISK_PATH"/sysroot/sysroot-glibc-linaro-2.23-2017.05-arm-linux-gnueabihf
+  SYSROOT_PATH_UCLIBC="$RAMDISK_PATH"/sysroot/sysroot-uclibc
+  SYSROOT_PATH_GLIBC_RISCV64="$RAMDISK_PATH"/sysroot/sysroot-glibc-riscv64
+  SYSROOT_PATH_MUSL_RISCV64="$RAMDISK_PATH"/sysroot/sysroot-musl-riscv64
+  SYSROOT_PATH="$SYSROOT_PATH_64"
+
+  # envs setup for specific ${SDK_VER}
+  envs_sdk_ver
+
+  if [ "${STORAGE_TYPE}" == "spinand" ]; then
+    PAGE_SUFFIX=2k
+    if [ ${NANDFLASH_PAGESIZE} == 4096 ]; then
+      PAGE_SUFFIX=4k
+    fi
+
+    if [[ "$ENABLE_ALIOS" != "y" ]]; then
+      pushd "$BUILD_PATH"/boards/"${CHIP_ARCH,,}"/"$PROJECT_FULLNAME"/partition/
+      ln -fs ../../../default/partition/partition_spinand_page_"$PAGE_SUFFIX".xml \
+        partition_"$STORAGE_TYPE".xml
+      popd
+    fi
+  fi
+
+  # configure flash partition table
+  if [ -z "${STORAGE_TYPE}" ]; then
+    FLASH_PARTITION_XML="$BUILD_PATH"/boards/default/partition/partition_none.xml
+  else
+    FLASH_PARTITION_XML="$BUILD_PATH"/boards/"${CHIP_ARCH,,}"/"$PROJECT_FULLNAME"/partition/partition_"$STORAGE_TYPE".xml
+    if ! [ -e "$FLASH_PARTITION_XML" ]; then
+      print_error "${FLASH_PARTITION_XML} does not exist!!"
+      return 1
+    fi
+  fi
+
+  export SYSTEM_OUT_DIR
+  export CROSS_COMPILE_PATH
+  # buildroot config
+  export BR_DIR="$TOP_DIR"/buildroot-2021.05
+  export BR_BOARD=milkv_duo_${SDK_VER}
+  export BR_OVERLAY_DIR=${BR_DIR}/board/milkv/${CHIP_ARCH}/overlay
+  export BR_DEFCONFIG=${BR_BOARD}_defconfig
+  export BR_ROOTFS_DIR="$OUTPUT_DIR"/tmp-rootfs
+}
+
+cvi_print_env()
+{
+  echo -e ""
+  echo -e "\e[1;32m====== Environment Variables ======= \e[0m\n"
+  echo -e "  PROJECT: \e[34m$PROJECT_FULLNAME\e[0m, DDR_CFG=\e[34m$DDR_CFG\e[0m"
+  echo -e "  CHIP_ARCH: \e[34m$CHIP_ARCH\e[0m, DEBUG=\e[34m$DEBUG\e[0m"
+  echo -e "  SDK VERSION: \e[34m$SDK_VER\e[0m, RPC=\e[34m$MULTI_PROCESS_SUPPORT\e[0m"
+  echo -e "  ATF options: ATF_KEY_SEL=\e[34m$ATF_KEY_SEL\e[0m, BL32=\e[34m$ATF_BL32\e[0m"
+  echo -e "  Linux source folder:\e[34m$KERNEL_SRC\e[0m, Uboot source folder: \e[34m$UBOOT_SRC\e[0m"
+  echo -e "  CROSS_COMPILE_PREFIX: \e[34m$CROSS_COMPILE\e[0m"
+  echo -e "  ENABLE_BOOTLOGO: $ENABLE_BOOTLOGO"
+  echo -e "  Flash layout xml: $FLASH_PARTITION_XML"
+  echo -e "  Sensor tuning bin: $SENSOR_TUNING_PARAM"
+  echo -e "  Output path: \e[33m$OUTPUT_DIR\e[0m"
+  echo -e ""
+}
+
+function pack_access_guard_turnkey_app()
+{
+  if [[ -d "$ACCESSGUARD_PATH" ]] && [[ "$BUILD_TURNKEY_ACCESSGUARD" = "y" ]]; then
+    mkdir -p "$SYSTEM_OUT_DIR"/data
+    cp -a  ${ACCESSGUARD_PATH}/install "$SYSTEM_OUT_DIR"/data/
+  fi
+}
+
+function pack_ipc_turnkey_app()
+{
+  if [[ -d "$IPC_APP_PATH" ]] && [[ "$BUILD_TURNKEY_IPC" = "y" ]]; then
+    mkdir -p "$SYSTEM_OUT_DIR"/data
+    cp -a  ${IPC_APP_PATH}/install "$SYSTEM_OUT_DIR"/data/
+  fi
+}
+
+function print_usage()
+{
+  printf "  -------------------------------------------------------------------------------------------------------\n"
+  printf "    Usage:\n"
+  printf "    (1)\33[94m menuconfig \33[0m- Use menu to configure your board.\n"
+  printf "        ex: $ menuconfig\n\n"
+  printf "    (2)\33[96m defconfig \$CHIP_ARCH \33[0m- List EVB boards(\$BOARD) by CHIP_ARCH.\n"
+  "${BUILD_PATH}/scripts/boards_scan.py" --list-chip-arch
+  printf "        ex: $ defconfig cv183x\n\n"
+  printf "    (3)\33[92m defconfig \$BOARD\33[0m - Choose EVB board settings.\n"
+  printf "        ex: $ defconfig cv1835_wevb_0002a\n"
+  printf "        ex: $ defconfig cv1826_wevb_0005a_spinand\n"
+  printf "        ex: $ defconfig cv181x_fpga_c906\n"
+  printf "  -------------------------------------------------------------------------------------------------------\n"
+}
+
+TOP_DIR=$(gettop)
+BUILD_PATH="$TOP_DIR/build"
+export TOP_DIR BUILD_PATH
+"${BUILD_PATH}/scripts/boards_scan.py" --gen-build-kconfig
+"${BUILD_PATH}/scripts/gen_sensor_config.py"
+"${BUILD_PATH}/scripts/gen_panel_config.py"
+
+# import common functions
+# shellcheck source=./common_functions.sh
+source "$TOP_DIR/build/common_functions.sh"
+
+print_usage
diff --git a/buildroot-2021.05/board/milkv/CV180X/overlay/.gitignore b/buildroot-2021.05/board/milkv/CV180X/overlay/.gitignore
new file mode 100644
index 000000000..046da0cec
--- /dev/null
+++ b/buildroot-2021.05/board/milkv/CV180X/overlay/.gitignore
@@ -0,0 +1 @@
+mnt/system/
\ No newline at end of file
diff --git a/buildroot-2021.05/board/milkv/CV180X/overlay/etc/init.d/S99user b/buildroot-2021.05/board/milkv/CV180X/overlay/etc/init.d/S99user
new file mode 100755
index 000000000..528e71afe
--- /dev/null
+++ b/buildroot-2021.05/board/milkv/CV180X/overlay/etc/init.d/S99user
@@ -0,0 +1,37 @@
+#!/bin/sh
+${CVI_SHOPTS}
+#
+# Start firmware
+#
+export USERDATAPATH=/mnt/data/
+export SYSTEMPATH=/mnt/system/
+
+case "$1" in
+  start)
+        echo "init mpp system..."
+        if [ -d $SYSTEMPATH/ko ]; then
+                sh $SYSTEMPATH/ko/loadsystemko.sh
+        fi
+
+        echo "Starting app..."
+        if [ -f $USERDATAPATH/auto.sh ]; then
+                usleep 30000
+                . $USERDATAPATH/auto.sh &
+		exit 1
+        fi
+	if [ -f $SYSTEMPATH/auto.sh ]; then
+                usleep 30000
+                . $SYSTEMPATH/auto.sh &
+        fi
+        ;;
+  stop)
+        ;;
+  restart|reload)
+        ;;
+  *)
+        echo "Usage: $0 {start|stop|restart}"
+        exit 1
+esac
+
+exit $?
+
diff --git a/buildroot-2021.05/board/milkv/CV180X/overlay/etc/inittab b/buildroot-2021.05/board/milkv/CV180X/overlay/etc/inittab
new file mode 100644
index 000000000..2c9793ce9
--- /dev/null
+++ b/buildroot-2021.05/board/milkv/CV180X/overlay/etc/inittab
@@ -0,0 +1,40 @@
+# /etc/inittab
+#
+# Copyright (C) 2001 Erik Andersen <andersen@codepoet.org>
+#
+# Note: BusyBox init doesn't support runlevels.  The runlevels field is
+# completely ignored by BusyBox init. If you want runlevels, use
+# sysvinit.
+#
+# Format for each entry: <id>:<runlevels>:<action>:<process>
+#
+# id        == tty to run on, or empty for /dev/console
+# runlevels == ignored
+# action    == one of sysinit, respawn, askfirst, wait, and once
+# process   == program to run
+
+# Startup the system
+::sysinit:/bin/mount -t proc proc /proc
+::sysinit:/bin/mount -o remount,rw /
+::sysinit:/bin/mkdir -p /dev/pts /dev/shm
+::sysinit:/bin/mount -a
+::sysinit:/sbin/swapon -a
+null::sysinit:/bin/ln -sf /proc/self/fd /dev/fd
+null::sysinit:/bin/ln -sf /proc/self/fd/0 /dev/stdin
+null::sysinit:/bin/ln -sf /proc/self/fd/1 /dev/stdout
+null::sysinit:/bin/ln -sf /proc/self/fd/2 /dev/stderr
+::sysinit:/bin/hostname -F /etc/hostname
+# now run any rc scripts
+::sysinit:/etc/init.d/rcS
+
+# Put a getty on the serial port
+# console::respawn:/sbin/getty -L  console 0 vt100 # GENERIC_SERIAL
+console::respawn:/sbin/getty -L  console 115200 vt100 -n -l /usr/local/bin/autologin
+
+# Stuff to do for the 3-finger salute
+#::ctrlaltdel:/sbin/reboot
+
+# Stuff to do before rebooting
+::shutdown:/etc/init.d/rcK
+::shutdown:/sbin/swapoff -a
+::shutdown:/bin/umount -a -r
diff --git a/buildroot-2021.05/board/milkv/CV180X/overlay/etc/profile b/buildroot-2021.05/board/milkv/CV180X/overlay/etc/profile
new file mode 100644
index 000000000..d99b37863
--- /dev/null
+++ b/buildroot-2021.05/board/milkv/CV180X/overlay/etc/profile
@@ -0,0 +1,37 @@
+export PATH="/bin:/sbin:/usr/bin:/usr/sbin"
+export PATH="/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/mnt/system/usr/bin:/mnt/system/usr/sbin:/mnt/data/bin:/mnt/data/sbin"
+
+if [ "$PS1" ]; then
+	if [ "`id -u`" -eq 0 ]; then
+		export PS1='# '
+	else
+		export PS1='$ '
+	fi
+fi
+
+export PAGER='/bin/more '
+export EDITOR='/bin/vi'
+
+# Source configuration files from /etc/profile.d
+for i in /etc/profile.d/*.sh ; do
+	if [ -r "$i" ]; then
+		. $i
+	fi
+	unset i
+done
+
+export HOSTNAME="$(hostname)"
+export OLDPWD=/root
+
+if [ '$USER' == 'root' ]; then
+    export PS1='[\u@\h]\w\# '
+else
+    export PS1='[\u@\h]\w\$ '
+fi
+
+alias ll='ls -alF'
+alias la='ls -A'
+alias l='ls -CF'
+
+export TERM=vt100
+export TERMINFO=/usr/share/terminfo
diff --git a/buildroot-2021.05/board/milkv/CV180X/overlay/etc/run_usb.sh b/buildroot-2021.05/board/milkv/CV180X/overlay/etc/run_usb.sh
new file mode 100755
index 000000000..760c70284
--- /dev/null
+++ b/buildroot-2021.05/board/milkv/CV180X/overlay/etc/run_usb.sh
@@ -0,0 +1,292 @@
+CLASS=acm
+VID=0x3346
+PID=0x1003
+MSC_PID=0x1008
+RNDIS_PID=0x1009
+UVC_PID=0x100A
+UAC_PID=0x100B
+ADB_VID=0x18D1
+ADB_PID=0x4EE0
+ADB_PID_M1=0x4EE2
+ADB_PID_M2=0x4EE4
+MANUFACTURER="Cvitek"
+PRODUCT="USB Com Port"
+PRODUCT_RNDIS="RNDIS"
+PRODUCT_UVC="UVC"
+PRODUCT_UAC="UAC"
+PRODUCT_ADB="ADB"
+ADBD_PATH=/usr/bin/
+SERIAL="0123456789"
+MSC_FILE=$3
+CVI_DIR=/tmp/usb
+CVI_GADGET=$CVI_DIR/usb_gadget/cvitek
+CVI_FUNC=$CVI_GADGET/functions
+FUNC_NUM=0
+MAX_EP_NUM=4
+TMP_NUM=0
+INTF_NUM=0
+EP_IN=0
+EP_OUT=0
+
+case "$2" in
+  acm)
+	CLASS=acm
+	;;
+  msc)
+	CLASS=mass_storage
+	PID=$MSC_PID
+	;;
+  cvg)
+	CLASS=cvg
+	;;
+  rndis)
+	CLASS=rndis
+	PID=$RNDIS_PID
+	PRODUCT=$PRODUCT_RNDIS
+	;;
+  uvc)
+	CLASS=uvc
+	PID=$UVC_PID
+	PRODUCT=$PRODUCT_UVC
+	;;
+  uac1)
+	CLASS=uac1
+	PID=$UAC_PID
+	PRODUCT=$PRODUCT_UAC
+	;;
+  adb)
+	CLASS=ffs.adb
+	VID=$ADB_VID
+	PID=$ADB_PID
+	PRODUCT=$PRODUCT_ADB
+	;;
+  *)
+	if [ "$1" = "probe" ] ; then
+	  echo "Usage: $0 probe {acm|msc|cvg|rndis|uvc|uac1|adb}"
+	  exit 1
+	fi
+esac
+
+calc_func() {
+  FUNC_NUM=$(ls $CVI_GADGET/functions -l | grep ^d | wc -l)
+  echo "$FUNC_NUM file(s)"
+}
+
+res_check() {
+  TMP_NUM=$(find $CVI_GADGET/functions/ -name "acm*" | wc -l)
+  EP_OUT=$(($EP_OUT+$TMP_NUM))
+  TMP_NUM=$(($TMP_NUM * 2))
+  EP_IN=$(($EP_IN+$TMP_NUM))
+  INTF_NUM=$(($INTF_NUM+$TMP_NUM))
+  TMP_NUM=$(find $CVI_GADGET/functions/ -name "mass_storage*" | wc -l)
+  EP_IN=$(($EP_IN+$TMP_NUM))
+  EP_OUT=$(($EP_OUT+$TMP_NUM))
+  INTF_NUM=$(($INTF_NUM+$TMP_NUM))
+  TMP_NUM=$(find $CVI_GADGET/functions/ -name "cvg*" | wc -l)
+  EP_IN=$(($EP_IN+$TMP_NUM))
+  EP_OUT=$(($EP_OUT+$TMP_NUM))
+  INTF_NUM=$(($INTF_NUM+$TMP_NUM))
+  TMP_NUM=$(find $CVI_GADGET/functions/ -name "rndis*" | wc -l)
+  EP_OUT=$(($EP_OUT+$TMP_NUM))
+  TMP_NUM=$(($TMP_NUM * 2))
+  EP_IN=$(($EP_IN+$TMP_NUM))
+  INTF_NUM=$(($INTF_NUM+$TMP_NUM))
+  TMP_NUM=$(find $CVI_GADGET/functions/ -name "uvc*" | wc -l)
+  TMP_NUM=$(($TMP_NUM * 2))
+  EP_IN=$(($EP_IN+$TMP_NUM))
+  INTF_NUM=$(($INTF_NUM+$TMP_NUM))
+  TMP_NUM=$(find $CVI_GADGET/functions/ -name "uac1*" | wc -l)
+  TMP_NUM=$(($TMP_NUM * 2))
+  EP_IN=$(($EP_IN+$TMP_NUM))
+  EP_OUT=$(($EP_OUT+$TMP_NUM))
+  INTF_NUM=$(($INTF_NUM+$TMP_NUM))
+  TMP_NUM=$(find $CVI_GADGET/functions/ -name ffs.adb | wc -l)
+  EP_IN=$(($EP_IN+$TMP_NUM))
+  EP_OUT=$(($EP_OUT+$TMP_NUM))
+  INTF_NUM=$(($INTF_NUM+$TMP_NUM))
+
+  if [ "$CLASS" = "acm" ] ; then
+    EP_IN=$(($EP_IN+2))
+    EP_OUT=$(($EP_OUT+1))
+  fi
+  if [ "$CLASS" = "mass_storage" ] ; then
+    EP_IN=$(($EP_IN+1))
+    EP_OUT=$(($EP_OUT+1))
+  fi
+  if [ "$CLASS" = "cvg" ] ; then
+    EP_IN=$(($EP_IN+1))
+    EP_OUT=$(($EP_OUT+1))
+  fi
+  if [ "$CLASS" = "rndis" ] ; then
+    EP_IN=$(($EP_IN+2))
+    EP_OUT=$(($EP_OUT+1))
+  fi
+  if [ "$CLASS" = "uvc" ] ; then
+    EP_IN=$(($EP_IN+2))
+  fi
+  if [ "$CLASS" = "uac1" ] ; then
+    EP_IN=$(($EP_IN+1))
+    EP_OUT=$(($EP_OUT+1))
+  fi
+  if [ "$CLASS" = "ffs.adb" ] ; then
+    EP_IN=$(($EP_IN+1))
+    EP_OUT=$(($EP_OUT+1))
+  fi
+  echo "$EP_IN in ep"
+  echo "$EP_OUT out ep"
+  if [ $EP_IN -gt $MAX_EP_NUM ]; then
+    echo "reach maximum resource"
+    exit 1
+  fi
+  if [ $EP_OUT -gt $MAX_EP_NUM ]; then
+    echo "reach maximum resource"
+    exit 1
+  fi
+}
+
+probe() {
+  if [ ! -d $CVI_DIR ]; then
+    mkdir $CVI_DIR
+  fi
+  if [ ! -d $CVI_DIR/usb_gadget ]; then
+    # Enale USB ConfigFS
+    mount none $CVI_DIR -t configfs
+    # Create gadget dev
+    mkdir $CVI_GADGET
+    # Set the VID and PID
+    echo $VID >$CVI_GADGET/idVendor
+    echo $PID >$CVI_GADGET/idProduct
+    # Set the product information string
+    mkdir $CVI_GADGET/strings/0x409
+    echo $MANUFACTURER>$CVI_GADGET/strings/0x409/manufacturer
+    echo $PRODUCT>$CVI_GADGET/strings/0x409/product
+    echo $SERIAL>$CVI_GADGET/strings/0x409/serialnumber
+    # Set the USB configuration
+    mkdir $CVI_GADGET/configs/c.1
+    mkdir $CVI_GADGET/configs/c.1/strings/0x409
+    echo "config1">$CVI_GADGET/configs/c.1/strings/0x409/configuration
+    # Set the MaxPower of USB descriptor
+    echo 120 >$CVI_GADGET/configs/c.1/MaxPower
+  fi
+  # get current functions number
+  calc_func
+  # assign the class code for composite device
+  if [ ! $FUNC_NUM -eq 0 ]; then
+    echo 0xEF >$CVI_GADGET/bDeviceClass
+    echo 0x02 >$CVI_GADGET/bDeviceSubClass
+    echo 0x01 >$CVI_GADGET/bDeviceProtocol
+  fi
+  # resource check
+  res_check
+  # create the desired function
+  if [ "$CLASS" = "ffs.adb" ] ; then
+    # adb shall be the last function to probe. Override the pid/vid
+    echo $VID >$CVI_GADGET/idVendor
+    echo $PID >$CVI_GADGET/idProduct
+    # choose pid for different function number
+    if [ $INTF_NUM -eq 1 ]; then
+      echo $ADB_PID_M1 >$CVI_GADGET/idProduct
+    fi
+    if [ $INTF_NUM -eq 2 ]; then
+      echo $ADB_PID_M2 >$CVI_GADGET/idProduct
+    fi
+    mkdir $CVI_GADGET/functions/$CLASS
+  else
+    mkdir $CVI_GADGET/functions/$CLASS.usb$FUNC_NUM
+  fi
+  if [ "$CLASS" = "mass_storage" ] ; then
+    echo $MSC_FILE >$CVI_GADGET/functions/$CLASS.usb$FUNC_NUM/lun.0/file
+  fi
+  if [ "$CLASS" = "rndis" ] ; then
+    #OS STRING
+    echo 1 >$CVI_GADGET/os_desc/use
+    echo 0xcd >$CVI_GADGET/os_desc/b_vendor_code
+    echo MSFT100 >$CVI_GADGET/os_desc/qw_sign
+    #COMPATIBLE ID
+    echo RNDIS >$CVI_FUNC/rndis.usb$FUNC_NUM/os_desc/interface.rndis/compatible_id
+    #MAKE c.1 THE ONE ASSOCIATED WITH OS DESCRIPTORS
+    ln -s $CVI_GADGET/configs/c.1 $CVI_GADGET/os_desc
+    #MAKE "Icons" EXTENDED PROPERTY
+    mkdir $CVI_FUNC/rndis.usb$FUNC_NUM/os_desc/interface.rndis/Icons
+    echo 2 >$CVI_FUNC/rndis.usb$FUNC_NUM/os_desc/interface.rndis/Icons/type
+    echo "%SystemRoot%\\system32\\shell32.dll,-233" >$CVI_FUNC/rndis.usb$FUNC_NUM/os_desc/interface.rndis/Icons/data
+    #MAKE "Label" EXTENDED PROPERTY
+    mkdir $CVI_FUNC/rndis.usb$FUNC_NUM/os_desc/interface.rndis/Label
+    echo 1 >$CVI_FUNC/rndis.usb$FUNC_NUM/os_desc/interface.rndis/Label/type
+    echo "XYZ Device" >$CVI_FUNC/rndis.usb$FUNC_NUM/os_desc/interface.rndis/Label/data
+  fi
+
+}
+
+start() {
+  # link this function to the configuration
+  calc_func
+  if [ $FUNC_NUM -eq 0 ]; then
+    echo "Functions Empty!"
+    exit 1
+  fi
+  if [ -d $CVI_GADGET/functions/ffs.adb ]; then
+    FUNC_NUM=$(($FUNC_NUM-1))
+  fi
+  for i in `seq 0 $(($FUNC_NUM-1))`;
+  do
+    find $CVI_GADGET/functions/ -name "*.usb$i" | xargs -I % ln -s % $CVI_GADGET/configs/c.1
+  done
+  if [ -d $CVI_GADGET/functions/ffs.adb ]; then
+    ln -s $CVI_GADGET/functions/ffs.adb $CVI_GADGET/configs/c.1
+    mkdir /dev/usb-ffs/adb -p
+    mount -t functionfs adb /dev/usb-ffs/adb
+    if [ -f $ADBD_PATH/adbd ]; then
+	$ADBD_PATH/adbd &
+    fi
+  else
+    # Start the gadget driver
+    UDC=`ls /sys/class/udc/ | awk '{print $1}'`
+    echo ${UDC} >$CVI_GADGET/UDC
+  fi
+}
+
+stop() {
+  if [ -d $CVI_GADGET/configs/c.1/ffs.adb ]; then
+    pkill adbd
+    rm $CVI_GADGET/configs/c.1/ffs.adb
+  else
+    echo "" >$CVI_GADGET/UDC
+  fi
+  find $CVI_GADGET/configs/ -name "*.usb*" | xargs rm -f
+  rmdir $CVI_GADGET/configs/c.*/strings/0x409/
+  tmp_dirs=$(find $CVI_GADGET/os_desc/c.* -type d)
+  if [ -n tmp_dirs ]; then
+    echo "remove os_desc!"
+    rm -rf $CVI_GADGET/os_desc/c.*/
+    find $CVI_GADGET/functions/ -name Icons | xargs rmdir
+    find $CVI_GADGET/functions/ -name Label | xargs rmdir
+  fi
+  rmdir $CVI_GADGET/configs/c.*/
+  rmdir $CVI_GADGET/functions/*
+  rmdir $CVI_GADGET/strings/0x409/
+  rmdir $CVI_GADGET
+  umount $CVI_DIR
+  rmdir $CVI_DIR
+}
+
+case "$1" in
+  start)
+	start
+	;;
+  stop)
+	stop
+	;;
+  probe)
+	probe
+	;;
+  UDC)
+	ls /sys/class/udc/ >$CVI_GADGET/UDC
+	;;
+  *)
+	echo "Usage: $0 probe {acm|msc|cvg|uvc|uac1} {file (msc)}"
+	echo "Usage: $0 start"
+	echo "Usage: $0 stop"
+	exit 1
+esac
+exit $?
diff --git a/buildroot-2021.05/board/milkv/CV180X/overlay/etc/uhubon.sh b/buildroot-2021.05/board/milkv/CV180X/overlay/etc/uhubon.sh
new file mode 100755
index 000000000..a8256765d
--- /dev/null
+++ b/buildroot-2021.05/board/milkv/CV180X/overlay/etc/uhubon.sh
@@ -0,0 +1,83 @@
+GPIO_HUBPORT_EN=449
+GPIO_ROLESEL=450
+GPIO_HUBRST=451
+SYS_GPIO=/sys/class/gpio
+
+hub_on() {
+  echo "turn on usb hub"
+  if [ ! -d $SYS_GPIO/gpio$GPIO_HUBPORT_EN ]; then
+      echo $GPIO_HUBPORT_EN >/sys/class/gpio/export
+  fi
+
+  if [ ! -d $SYS_GPIO/gpio$GPIO_ROLESEL ]; then
+      echo $GPIO_ROLESEL >/sys/class/gpio/export
+  fi
+
+  if [ ! -d $SYS_GPIO/gpio$GPIO_HUBRST ]; then
+      echo $GPIO_HUBRST >/sys/class/gpio/export
+  fi
+
+  echo "out" >/sys/class/gpio/gpio$GPIO_HUBPORT_EN/direction
+  echo "out" >/sys/class/gpio/gpio$GPIO_ROLESEL/direction
+  echo "out" >/sys/class/gpio/gpio$GPIO_HUBRST/direction
+
+  echo 1 >/sys/class/gpio/gpio$GPIO_HUBPORT_EN/value
+  echo 0 >/sys/class/gpio/gpio$GPIO_ROLESEL/value
+  echo 0 >/sys/class/gpio/gpio$GPIO_HUBRST/value
+}
+
+hub_off() {
+  echo "turn off usb hub"
+  if [ ! -d $SYS_GPIO/gpio$GPIO_HUBPORT_EN ]; then
+      echo $GPIO_HUBPORT_EN >/sys/class/gpio/export
+  fi
+
+  if [ ! -d $SYS_GPIO/gpio$GPIO_ROLESEL ]; then
+      echo $GPIO_ROLESEL >/sys/class/gpio/export
+  fi
+
+  if [ ! -d $SYS_GPIO/gpio$GPIO_HUBRST ]; then
+      echo $GPIO_HUBRST >/sys/class/gpio/export
+  fi
+
+  echo "out" >/sys/class/gpio/gpio$GPIO_HUBPORT_EN/direction
+  echo "out" >/sys/class/gpio/gpio$GPIO_ROLESEL/direction
+  echo "out" >/sys/class/gpio/gpio$GPIO_HUBRST/direction
+
+  echo 0 >/sys/class/gpio/gpio$GPIO_HUBPORT_EN/value
+  echo 1 >/sys/class/gpio/gpio$GPIO_ROLESEL/value
+  echo 1 >/sys/class/gpio/gpio$GPIO_HUBRST/value
+}
+
+inst_mod() {
+  insmod /mnt/system/ko/configfs.ko
+  insmod /mnt/system/ko/libcomposite.ko
+  insmod /mnt/system/ko/u_serial.ko
+  insmod /mnt/system/ko/usb_f_acm.ko
+  insmod /mnt/system/ko/cvi_usb_f_cvg.ko
+  insmod /mnt/system/ko/usb_f_uvc.ko
+  insmod /mnt/system/ko/usb_f_fs.ko
+  insmod /mnt/system/ko/u_audio.ko
+  insmod /mnt/system/ko/usb_f_uac1.ko
+  insmod /mnt/system/ko/usb_f_serial.ko
+  insmod /mnt/system/ko/usb_f_mass_storage.ko
+  insmod /mnt/system/ko/u_ether.ko
+  insmod /mnt/system/ko/usb_f_ecm.ko
+  insmod /mnt/system/ko/usb_f_eem.ko
+  insmod /mnt/system/ko/usb_f_rndis.ko
+}
+
+case "$1" in
+  host)
+	insmod /mnt/system/ko/dwc2.ko
+  echo host > /proc/cviusb/otg_role
+	;;
+  device)
+	echo device > /proc/cviusb/otg_role
+	;;
+  *)
+	echo "Usage: $0 host"
+	echo "Usage: $0 device"
+	exit 1
+esac
+exit $?
diff --git a/buildroot-2021.05/board/milkv/CV180X/overlay/lib/ld-musl-riscv64v0p7_xthead.so.1 b/buildroot-2021.05/board/milkv/CV180X/overlay/lib/ld-musl-riscv64v0p7_xthead.so.1
new file mode 120000
index 000000000..4665bcf84
--- /dev/null
+++ b/buildroot-2021.05/board/milkv/CV180X/overlay/lib/ld-musl-riscv64v0p7_xthead.so.1
@@ -0,0 +1 @@
+../usr/lib64v0p7_xthead/lp64d/libc.so
\ No newline at end of file
diff --git a/buildroot-2021.05/board/milkv/CV180X/overlay/usr/lib64v0p7_xthead/lp64d/libc.so b/buildroot-2021.05/board/milkv/CV180X/overlay/usr/lib64v0p7_xthead/lp64d/libc.so
new file mode 100755
index 000000000..8a2b8ff7d
Binary files /dev/null and b/buildroot-2021.05/board/milkv/CV180X/overlay/usr/lib64v0p7_xthead/lp64d/libc.so differ
diff --git a/buildroot-2021.05/board/milkv/CV180X/overlay/usr/local/bin/autologin b/buildroot-2021.05/board/milkv/CV180X/overlay/usr/local/bin/autologin
new file mode 100755
index 000000000..6f12842ec
--- /dev/null
+++ b/buildroot-2021.05/board/milkv/CV180X/overlay/usr/local/bin/autologin
@@ -0,0 +1,2 @@
+#! /bin/sh
+exec /bin/login -f root
diff --git a/buildroot-2021.05/configs/milkv_duo_musl_riscv64_defconfig b/buildroot-2021.05/configs/milkv_duo_musl_riscv64_defconfig
new file mode 100644
index 000000000..2b2515be3
--- /dev/null
+++ b/buildroot-2021.05/configs/milkv_duo_musl_riscv64_defconfig
@@ -0,0 +1,482 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Buildroot -g8c59e72e33-dirty Configuration
+#
+BR2_HAVE_DOT_CONFIG=y
+BR2_HOST_GCC_AT_LEAST_4_9=y
+BR2_HOST_GCC_AT_LEAST_5=y
+BR2_HOST_GCC_AT_LEAST_6=y
+BR2_HOST_GCC_AT_LEAST_7=y
+
+#
+# Target options
+#
+BR2_ARCH_IS_64=y
+BR2_ARCH_HAS_MMU_MANDATORY=y
+BR2_riscv=y
+BR2_ARCH_HAS_TOOLCHAIN_BUILDROOT=y
+BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8=y
+BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9=y
+BR2_ARCH_NEEDS_GCC_AT_LEAST_5=y
+BR2_ARCH_NEEDS_GCC_AT_LEAST_6=y
+BR2_ARCH_NEEDS_GCC_AT_LEAST_7=y
+BR2_ARCH="riscv64"
+BR2_ENDIAN="LITTLE"
+BR2_GCC_TARGET_ABI="lp64d"
+BR2_BINFMT_SUPPORTS_SHARED=y
+BR2_READELF_ARCH_NAME="RISC-V"
+BR2_BINFMT_ELF=y
+BR2_RISCV_ISA_RVI=y
+BR2_RISCV_ISA_RVM=y
+BR2_RISCV_ISA_RVA=y
+BR2_RISCV_ISA_RVF=y
+BR2_RISCV_ISA_RVD=y
+BR2_riscv_g=y
+# BR2_riscv_custom is not set
+# BR2_RISCV_32 is not set
+BR2_RISCV_64=y
+# BR2_RISCV_ABI_LP64 is not set
+# BR2_RISCV_ABI_LP64F is not set
+BR2_RISCV_ABI_LP64D=y
+
+#
+# Build options
+#
+
+#
+# Commands
+#
+BR2_WGET="wget --passive-ftp -nd -t 3"
+BR2_SVN="svn --non-interactive"
+BR2_BZR="bzr"
+BR2_GIT="git"
+BR2_CVS="cvs"
+BR2_LOCALFILES="cp"
+BR2_SCP="scp"
+BR2_HG="hg"
+BR2_ZCAT="gzip -d -c"
+BR2_BZCAT="bzcat"
+BR2_XZCAT="xzcat"
+BR2_LZCAT="lzip -d -c"
+BR2_TAR_OPTIONS=""
+BR2_DEFCONFIG="./configs/milkv_duo_musl_riscv64_defconfig"
+BR2_DL_DIR="$(TOPDIR)/dl"
+BR2_HOST_DIR="$(BASE_DIR)/host"
+
+#
+# Mirrors and Download locations
+#
+BR2_PRIMARY_SITE=""
+BR2_BACKUP_SITE="http://sources.buildroot.net"
+BR2_KERNEL_MIRROR="https://cdn.kernel.org/pub"
+BR2_GNU_MIRROR="http://ftpmirror.gnu.org"
+BR2_LUAROCKS_MIRROR="http://rocks.moonscript.org"
+BR2_CPAN_MIRROR="http://cpan.metacpan.org"
+BR2_JLEVEL=0
+# BR2_CCACHE is not set
+# BR2_ENABLE_DEBUG is not set
+BR2_STRIP_strip=y
+BR2_STRIP_EXCLUDE_FILES=""
+BR2_STRIP_EXCLUDE_DIRS=""
+# BR2_OPTIMIZE_0 is not set
+# BR2_OPTIMIZE_1 is not set
+# BR2_OPTIMIZE_2 is not set
+# BR2_OPTIMIZE_3 is not set
+# BR2_OPTIMIZE_G is not set
+BR2_OPTIMIZE_S=y
+# BR2_OPTIMIZE_FAST is not set
+# BR2_STATIC_LIBS is not set
+BR2_SHARED_LIBS=y
+# BR2_SHARED_STATIC_LIBS is not set
+BR2_PACKAGE_OVERRIDE_FILE="$(CONFIG_DIR)/local.mk"
+BR2_GLOBAL_PATCH_DIR=""
+
+#
+# Advanced
+#
+BR2_COMPILER_PARANOID_UNSAFE_PATH=y
+# BR2_FORCE_HOST_BUILD is not set
+# BR2_REPRODUCIBLE is not set
+# BR2_PER_PACKAGE_DIRECTORIES is not set
+
+#
+# Security Hardening Options
+#
+BR2_PIC_PIE=y
+# BR2_SSP_NONE is not set
+# BR2_SSP_REGULAR is not set
+BR2_SSP_STRONG=y
+# BR2_SSP_ALL is not set
+BR2_SSP_OPTION="-fstack-protector-strong"
+# BR2_RELRO_NONE is not set
+# BR2_RELRO_PARTIAL is not set
+BR2_RELRO_FULL=y
+
+#
+# Fortify Source needs a glibc toolchain and optimization
+#
+
+#
+# Toolchain
+#
+BR2_TOOLCHAIN=y
+BR2_TOOLCHAIN_USES_MUSL=y
+# BR2_TOOLCHAIN_BUILDROOT is not set
+BR2_TOOLCHAIN_EXTERNAL=y
+
+#
+# Toolchain External Options
+#
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
+# BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD is not set
+BR2_TOOLCHAIN_EXTERNAL_PREINSTALLED=y
+# BR2_TOOLCHAIN_EXTERNAL_PATH="/data/sam/sdk/cv180x_v400/host-tools/gcc/riscv64-linux-musl-x86_64"
+BR2_TOOLCHAIN_EXTERNAL_MUSL=y
+BR2_PACKAGE_HAS_TOOLCHAIN_EXTERNAL=y
+BR2_PACKAGE_PROVIDES_TOOLCHAIN_EXTERNAL="toolchain-external-custom"
+BR2_TOOLCHAIN_EXTERNAL_PREFIX="riscv64-unknown-linux-musl"
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX="riscv64-unknown-linux-musl"
+BR2_TOOLCHAIN_EXTERNAL_GCC_10=y
+BR2_TOOLCHAIN_EXTERNAL_HEADERS_5_10=y
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM_MUSL=y
+BR2_TOOLCHAIN_EXTERNAL_HAS_SSP=y
+BR2_TOOLCHAIN_EXTERNAL_HAS_SSP_STRONG=y
+BR2_TOOLCHAIN_EXTERNAL_CXX=y
+
+#
+# Toolchain Generic Options
+#
+BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS=y
+BR2_TOOLCHAIN_SUPPORTS_VARIADIC_MI_THUNK=y
+BR2_USE_WCHAR=y
+BR2_ENABLE_LOCALE=y
+BR2_INSTALL_LIBSTDCPP=y
+BR2_TOOLCHAIN_HAS_THREADS=y
+BR2_TOOLCHAIN_HAS_THREADS_DEBUG=y
+BR2_TOOLCHAIN_HAS_THREADS_NPTL=y
+BR2_TOOLCHAIN_HAS_SSP=y
+BR2_TOOLCHAIN_HAS_SSP_STRONG=y
+BR2_TOOLCHAIN_HAS_UCONTEXT=y
+BR2_TOOLCHAIN_SUPPORTS_PIE=y
+BR2_TOOLCHAIN_EXTRA_LIBS=""
+BR2_USE_MMU=y
+BR2_TARGET_OPTIMIZATION=""
+BR2_TARGET_LDFLAGS="-mcpu=c906fdv -march=rv64imafdcv0p7xthead -mcmodel=medany -mabi=lp64d"
+# BR2_ECLIPSE_REGISTER is not set
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_0=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_1=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_2=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_3=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_4=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_5=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_6=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_7=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_8=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_9=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_10=y
+BR2_TOOLCHAIN_HEADERS_AT_LEAST="5.10"
+BR2_TOOLCHAIN_GCC_AT_LEAST_4_3=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_4_4=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_4_5=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_4_6=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_4_7=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_4_8=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_4_9=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_5=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_6=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_7=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_8=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_9=y
+BR2_TOOLCHAIN_GCC_AT_LEAST_10=y
+BR2_TOOLCHAIN_GCC_AT_LEAST="10"
+BR2_TOOLCHAIN_HAS_MNAN_OPTION=y
+BR2_TOOLCHAIN_HAS_SYNC_1=y
+BR2_TOOLCHAIN_HAS_SYNC_2=y
+BR2_TOOLCHAIN_HAS_SYNC_4=y
+BR2_TOOLCHAIN_HAS_SYNC_8=y
+BR2_TOOLCHAIN_HAS_LIBATOMIC=y
+BR2_TOOLCHAIN_HAS_ATOMIC=y
+
+#
+# System configuration
+#
+BR2_ROOTFS_SKELETON_DEFAULT=y
+# BR2_ROOTFS_SKELETON_CUSTOM is not set
+BR2_TARGET_GENERIC_HOSTNAME="milkv"
+BR2_TARGET_GENERIC_ISSUE="Welcome to Milk-V"
+BR2_TARGET_GENERIC_PASSWD_SHA256=y
+# BR2_TARGET_GENERIC_PASSWD_SHA512 is not set
+BR2_TARGET_GENERIC_PASSWD_METHOD="sha-256"
+BR2_INIT_BUSYBOX=y
+# BR2_INIT_SYSV is not set
+# BR2_INIT_OPENRC is not set
+
+#
+# systemd needs a glibc toolchain w/ SSP, headers >= 3.10, host and target gcc >= 5
+#
+# BR2_INIT_NONE is not set
+# BR2_ROOTFS_DEVICE_CREATION_STATIC is not set
+BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_DEVTMPFS=y
+# BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV is not set
+# BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV is not set
+BR2_ROOTFS_DEVICE_TABLE="system/device_table.txt"
+# BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES is not set
+# BR2_ROOTFS_MERGED_USR is not set
+BR2_TARGET_ENABLE_ROOT_LOGIN=y
+BR2_TARGET_GENERIC_ROOT_PASSWD="milkv"
+BR2_SYSTEM_BIN_SH_BUSYBOX=y
+
+#
+# bash, dash, mksh, zsh need BR2_PACKAGE_BUSYBOX_SHOW_OTHERS
+#
+# BR2_SYSTEM_BIN_SH_NONE is not set
+BR2_TARGET_GENERIC_GETTY=y
+BR2_TARGET_GENERIC_GETTY_PORT="console"
+BR2_TARGET_GENERIC_GETTY_BAUDRATE_KEEP=y
+# BR2_TARGET_GENERIC_GETTY_BAUDRATE_9600 is not set
+# BR2_TARGET_GENERIC_GETTY_BAUDRATE_19200 is not set
+# BR2_TARGET_GENERIC_GETTY_BAUDRATE_38400 is not set
+# BR2_TARGET_GENERIC_GETTY_BAUDRATE_57600 is not set
+# BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200 is not set
+BR2_TARGET_GENERIC_GETTY_BAUDRATE="0"
+BR2_TARGET_GENERIC_GETTY_TERM="vt100"
+BR2_TARGET_GENERIC_GETTY_OPTIONS=""
+BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW=y
+BR2_SYSTEM_DHCP=""
+BR2_SYSTEM_DEFAULT_PATH="/bin:/sbin:/usr/bin:/usr/sbin"
+BR2_ENABLE_LOCALE_PURGE=y
+BR2_ENABLE_LOCALE_WHITELIST="C en_US"
+# BR2_SYSTEM_ENABLE_NLS is not set
+# BR2_TARGET_TZ_INFO is not set
+BR2_ROOTFS_USERS_TABLES=""
+BR2_ROOTFS_OVERLAY="board/milkv/CV180X/overlay"
+BR2_ROOTFS_POST_BUILD_SCRIPT=""
+BR2_ROOTFS_POST_FAKEROOT_SCRIPT=""
+BR2_ROOTFS_POST_IMAGE_SCRIPT=""
+
+#
+# Kernel
+#
+# BR2_LINUX_KERNEL is not set
+
+#
+# Target packages
+#
+BR2_PACKAGE_BUSYBOX=y
+BR2_PACKAGE_BUSYBOX_CONFIG="package/busybox/busybox.config"
+BR2_PACKAGE_BUSYBOX_CONFIG_FRAGMENT_FILES=""
+# BR2_PACKAGE_BUSYBOX_SHOW_OTHERS is not set
+# BR2_PACKAGE_BUSYBOX_INDIVIDUAL_BINARIES is not set
+# BR2_PACKAGE_BUSYBOX_WATCHDOG is not set
+BR2_PACKAGE_SKELETON=y
+BR2_PACKAGE_HAS_SKELETON=y
+BR2_PACKAGE_PROVIDES_SKELETON="skeleton-init-sysv"
+BR2_PACKAGE_SKELETON_INIT_COMMON=y
+BR2_PACKAGE_SKELETON_INIT_SYSV=y
+
+#
+# dt needs a glibc or uClibc toolchain w/ threads
+#
+# BR2_PACKAGE_DUMA is not set
+# BR2_PACKAGE_FIO is not set
+BR2_PACKAGE_GDB_ARCH_SUPPORTS=y
+BR2_PACKAGE_GDB=y
+# BR2_PACKAGE_IOZONE is not set
+
+#
+# ktap needs a Linux kernel to be built
+#
+# BR2_PACKAGE_LATENCYTOP is not set
+# BR2_PACKAGE_LMBENCH is not set
+BR2_PACKAGE_LTP_TESTSUITE_ARCH_SUPPORTS=y
+# BR2_PACKAGE_LTP_TESTSUITE is not set
+# BR2_PACKAGE_LTTNG_BABELTRACE is not set
+
+#
+# Development tools
+#
+BR2_PACKAGE_PROVIDES_HOST_GETTEXT="host-gettext-tiny"
+
+#
+# Filesystem and flash utilities
+#
+# BR2_PACKAGE_ABOOTIMG is not set
+
+#
+# davfs2 needs a glibc or uClibc toolchain
+#
+# BR2_PACKAGE_DOSFSTOOLS is not set
+BR2_PACKAGE_E2FSPROGS=y
+# BR2_PACKAGE_E2FSPROGS_DEBUGFS is not set
+# BR2_PACKAGE_E2FSPROGS_E2IMAGE is not set
+
+#
+# e2scrub needs bash, coreutils, lvm2, and util-linux
+#
+# BR2_PACKAGE_E2FSPROGS_E4DEFRAG is not set
+BR2_PACKAGE_E2FSPROGS_FSCK=y
+# BR2_PACKAGE_E2FSPROGS_FUSE2FS is not set
+BR2_PACKAGE_E2FSPROGS_RESIZE2FS=y
+
+#
+# eudev needs eudev /dev management
+#
+# BR2_PACKAGE_EVEMU is not set
+BR2_PACKAGE_EVTEST=y
+# BR2_PACKAGE_FAN_CTRL is not set
+# BR2_PACKAGE_FCONFIG is not set
+BR2_PACKAGE_FLASHROM_ARCH_SUPPORTS=y
+
+#
+# Compression and decompression
+#
+BR2_PACKAGE_PROVIDES_HOST_ZLIB="host-libzlib"
+# BR2_PACKAGE_ZZIPLIB is not set
+
+#
+# Crypto
+#
+# BR2_PACKAGE_BEARSSL is not set
+# BR2_PACKAGE_BEECRYPT is not set
+BR2_PACKAGE_BOTAN_ARCH_SUPPORTS=y
+# BR2_PACKAGE_BOTAN is not set
+# BR2_PACKAGE_CA_CERTIFICATES is not set
+
+#
+# cryptodev needs a Linux kernel to be built
+#
+BR2_PACKAGE_LIBGPG_ERROR_ARCH_SUPPORTS=y
+# BR2_PACKAGE_LIBGPG_ERROR is not set
+BR2_PACKAGE_LIBGPG_ERROR_SYSCFG="riscv64-unknown-linux-gnu"
+BR2_PACKAGE_PROVIDES_HOST_OPENSSL="host-libopenssl"
+
+#
+# JSON/XML
+#
+BR2_PACKAGE_JSON_C=y
+
+#
+# Multimedia
+#
+BR2_PACKAGE_LIBCAMERA_ARCH_SUPPORTS=y
+# BR2_PACKAGE_LIBCAMERA is not set
+
+#
+# libcgroup needs a glibc toolchain w/ C++
+#
+BR2_PACKAGE_MUSL_COMPAT_HEADERS=y
+# BR2_PACKAGE_MUSL_FTS is not set
+# BR2_PACKAGE_ORC is not set
+# BR2_PACKAGE_P11_KIT is not set
+BR2_PACKAGE_POCO_ARCH_SUPPORTS=y
+# BR2_PACKAGE_POCO is not set
+BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS=y
+# BR2_PACKAGE_PROTOBUF is not set
+# BR2_PACKAGE_PROTOBUF_C is not set
+
+#
+# vdr needs a glibc toolchain w/ C++, dynamic library, NPTL, wchar, headers >= 3.9
+#
+BR2_PACKAGE_WPA_SUPPLICANT=y
+BR2_PACKAGE_WPA_SUPPLICANT_NL80211=y
+BR2_PACKAGE_WPA_SUPPLICANT_CLI=y
+BR2_PACKAGE_WPA_SUPPLICANT_WPA_CLIENT_SO=y
+# BR2_PACKAGE_WPA_SUPPLICANT_PASSPHRASE is not set
+BR2_PACKAGE_WPA_SUPPLICANT_CTRL_IFACE=y
+# BR2_PACKAGE_WPA_SUPPLICANT_DBUS is not set
+
+#
+# emlog needs a Linux kernel to be built
+#
+BR2_PACKAGE_INITSCRIPTS=y
+
+#
+# iotop depends on python or python3
+#
+# BR2_PACKAGE_IPRUTILS is not set
+# BR2_PACKAGE_IRQBALANCE is not set
+# BR2_PACKAGE_KEYUTILS is not set
+BR2_PACKAGE_KMOD=y
+
+#
+# unscd needs a glibc toolchain
+#
+BR2_PACKAGE_UTIL_LINUX=y
+BR2_PACKAGE_UTIL_LINUX_LIBBLKID=y
+# BR2_PACKAGE_UTIL_LINUX_LIBFDISK is not set
+# BR2_PACKAGE_UTIL_LINUX_LIBMOUNT is not set
+# BR2_PACKAGE_UTIL_LINUX_LIBSMARTCOLS is not set
+BR2_PACKAGE_UTIL_LINUX_LIBUUID=y
+
+#
+# su needs a uClibc or glibc toolchain w/ wchar, locale, dynamic library
+#
+BR2_PACKAGE_UTIL_LINUX_UUIDD=y
+
+#
+# Filesystem images
+#
+BR2_TARGET_ROOTFS_EXT2=y
+# BR2_TARGET_ROOTFS_EXT2_2r0 is not set
+# BR2_TARGET_ROOTFS_EXT2_2r1 is not set
+# BR2_TARGET_ROOTFS_EXT2_3 is not set
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_GEN=4
+BR2_TARGET_ROOTFS_EXT2_REV=1
+BR2_TARGET_ROOTFS_EXT2_LABEL="rootfs"
+BR2_TARGET_ROOTFS_EXT2_SIZE="200M"
+BR2_TARGET_ROOTFS_EXT2_INODES=0
+BR2_TARGET_ROOTFS_EXT2_RESBLKS=5
+BR2_TARGET_ROOTFS_EXT2_MKFS_OPTIONS="-O ^64bit"
+BR2_TARGET_ROOTFS_EXT2_NONE=y
+
+#
+# initramfs needs a Linux kernel to be built
+#
+BR2_TARGET_ROOTFS_TAR=y
+BR2_TARGET_ROOTFS_TAR_XZ=y
+BR2_TARGET_ROOTFS_TAR_OPTIONS=""
+
+#
+# Host utilities
+#
+BR2_PACKAGE_HOST_E2FSPROGS=y
+BR2_PACKAGE_HOST_UTIL_LINUX=y
+
+#
+# Legacy options removed in 2019.11
+#
+BR2_TOOLCHAIN_EXTRA_EXTERNAL_LIBS=""
+
+#
+# Legacy options removed in 2017.08
+#
+# BR2_TARGET_GRUB is not set
+# BR2_PACKAGE_SIMICSFS is not set
+# BR2_BINUTILS_VERSION_2_26_X is not set
+BR2_XTENSA_OVERLAY_DIR=""
+BR2_XTENSA_CUSTOM_NAME=""
+# BR2_PACKAGE_HOST_MKE2IMG is not set
+BR2_TARGET_ROOTFS_EXT2_BLOCKS=0
+BR2_TARGET_ROOTFS_EXT2_EXTRA_INODES=0
+
+#
+# Legacy options removed in 2017.05
+#
+BR2_TARGET_ROOTFS_EXT2_EXTRA_BLOCKS=0
+
+BR2_PACKAGE_STRACE=y
+
+
+#
+# NetworkManager needs udev /dev management and a glibc toolchain w/ headers >= 3.2, dynamic library, wchar, threads
+#
+
+BR2_PACKAGE_DROPBEAR=y
+BR2_PACKAGE_DROPBEAR_CLIENT=y
+# # BR2_PACKAGE_DROPBEAR_DISABLE_REVERSEDNS is not set
+BR2_PACKAGE_DROPBEAR_SMALL=y
+# # BR2_PACKAGE_DROPBEAR_WTMP is not set
+# # BR2_PACKAGE_DROPBEAR_LASTLOG is not set
+# # BR2_PACKAGE_DROPBEAR_LEGACY_CRYPTO is not set
+# BR2_PACKAGE_DROPBEAR_LOCALOPTIONS_FILE=""
diff --git a/milkv/boardconfig-milkv-duo.sh b/milkv/boardconfig-milkv-duo.sh
index a43ff41a3..4764742ae 100644
--- a/milkv/boardconfig-milkv-duo.sh
+++ b/milkv/boardconfig-milkv-duo.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
 export MV_BOARD_CPU=cv1800b
-export MV_BUILD_ENV=cvisetup.sh
+export MV_BUILD_ENV=milkvsetup.sh
 export MV_BOARD_LINK=cv1800b_milkv_duo_sd