diff --git a/buildroot-2021.05/.gitignore b/buildroot-2021.05/.gitignore
index bb02d9f57..4f514aa0a 100644
--- a/buildroot-2021.05/.gitignore
+++ b/buildroot-2021.05/.gitignore
@@ -13,3 +13,6 @@
 *.rej
 *~
 *.pyc
+
+# add for cvitek board
+ board/cvitek/
diff --git a/buildroot-2021.05/arch/Config.in.riscv b/buildroot-2021.05/arch/Config.in.riscv
index 1fc20e5de..d8bdf13e4 100644
--- a/buildroot-2021.05/arch/Config.in.riscv
+++ b/buildroot-2021.05/arch/Config.in.riscv
@@ -18,6 +18,15 @@ config BR2_RISCV_ISA_RVD
 config BR2_RISCV_ISA_RVC
 	bool
 
+config BR2_RISCV_ISA_RVV
+	bool
+
+config BR2_RISCV_ISA_RVV0P7
+	bool
+
+config BR2_RISCV_ISA_THEAD
+	bool
+
 choice
 	prompt "Target Architecture Variant"
 	default BR2_riscv_g
@@ -63,6 +72,26 @@ config BR2_RISCV_ISA_CUSTOM_RVD
 config BR2_RISCV_ISA_CUSTOM_RVC
 	bool "Compressed Instructions (C)"
 	select BR2_RISCV_ISA_RVC
+
+choice
+	prompt "Vector Instructions"
+	default BR2_RISCV_ISA_CUSTOM_RVV_NONE
+
+config BR2_RISCV_ISA_CUSTOM_RVV_NONE
+	bool "Vector Instructions (None)"
+
+config BR2_RISCV_ISA_CUSTOM_RVV
+	bool "Vector Instructions (V)"
+	select BR2_RISCV_ISA_RVV
+
+config BR2_RISCV_ISA_CUSTOM_RVV0P7
+	bool "Vector 0.7 Instructions (V0P7)"
+	select BR2_RISCV_ISA_RVV0P7
+endchoice
+
+config BR2_RISCV_ISA_CUSTOM_THEAD
+	bool "T-HEAD Extensions"
+	select BR2_RISCV_ISA_THEAD
 endif
 
 choice
@@ -110,6 +139,10 @@ config BR2_RISCV_ABI_LP64F
 config BR2_RISCV_ABI_LP64D
 	bool "lp64d"
 	depends on BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVD
+
+config BR2_RISCV_ABI_LP64V
+	bool "lp64v"
+	depends on BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVV
 endchoice
 
 config BR2_ARCH
@@ -126,6 +159,7 @@ config BR2_GCC_TARGET_ABI
 	default "lp64" if BR2_RISCV_ABI_LP64
 	default "lp64f" if BR2_RISCV_ABI_LP64F
 	default "lp64d" if BR2_RISCV_ABI_LP64D
+	default "lp64v" if BR2_RISCV_ABI_LP64V
 
 config BR2_READELF_ARCH_NAME
 	default "RISC-V"
diff --git a/buildroot-2021.05/arch/arch.mk.riscv b/buildroot-2021.05/arch/arch.mk.riscv
index f3bf2b346..5cab248c3 100644
--- a/buildroot-2021.05/arch/arch.mk.riscv
+++ b/buildroot-2021.05/arch/arch.mk.riscv
@@ -26,5 +26,14 @@ endif
 ifeq ($(BR2_RISCV_ISA_RVC),y)
 GCC_TARGET_ARCH := $(GCC_TARGET_ARCH)c
 endif
+ifeq ($(BR2_RISCV_ISA_RVV),y)
+GCC_TARGET_ARCH := $(GCC_TARGET_ARCH)v
+endif
+ifeq ($(BR2_RISCV_ISA_RVV0P7),y)
+GCC_TARGET_ARCH := $(GCC_TARGET_ARCH)v0p7
+endif
+ifeq ($(BR2_RISCV_ISA_THEAD),y)
+GCC_TARGET_ARCH := $(GCC_TARGET_ARCH)xthead
+endif
 
 endif
diff --git a/buildroot-2021.05/board/cvitek/CV180X/overlay/lib/ld-musl-riscv64v0p7_xthead.so.1 b/buildroot-2021.05/board/cvitek/CV180X/overlay/lib/ld-musl-riscv64v0p7_xthead.so.1
deleted file mode 120000
index 4665bcf84..000000000
--- a/buildroot-2021.05/board/cvitek/CV180X/overlay/lib/ld-musl-riscv64v0p7_xthead.so.1
+++ /dev/null
@@ -1 +0,0 @@
-../usr/lib64v0p7_xthead/lp64d/libc.so
\ No newline at end of file
diff --git a/buildroot-2021.05/board/cvitek/CV180X/overlay/usr/lib64v0p7_xthead/lp64d/libc.so b/buildroot-2021.05/board/cvitek/CV180X/overlay/usr/lib64v0p7_xthead/lp64d/libc.so
deleted file mode 100755
index 8a2b8ff7d..000000000
Binary files a/buildroot-2021.05/board/cvitek/CV180X/overlay/usr/lib64v0p7_xthead/lp64d/libc.so and /dev/null differ
diff --git a/buildroot-2021.05/board/cvitek/CV181X/overlay/.gitignore b/buildroot-2021.05/board/cvitek/CV181X/overlay/.gitignore
new file mode 100644
index 000000000..046da0cec
--- /dev/null
+++ b/buildroot-2021.05/board/cvitek/CV181X/overlay/.gitignore
@@ -0,0 +1 @@
+mnt/system/
\ No newline at end of file
diff --git a/buildroot-2021.05/board/cvitek/CV181X/overlay/etc/init.d/S99user b/buildroot-2021.05/board/cvitek/CV181X/overlay/etc/init.d/S99user
new file mode 100755
index 000000000..528e71afe
--- /dev/null
+++ b/buildroot-2021.05/board/cvitek/CV181X/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/cvitek/CV181X/overlay/etc/inittab b/buildroot-2021.05/board/cvitek/CV181X/overlay/etc/inittab
new file mode 100644
index 000000000..2c9793ce9
--- /dev/null
+++ b/buildroot-2021.05/board/cvitek/CV181X/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/cvitek/CV181X/overlay/etc/profile b/buildroot-2021.05/board/cvitek/CV181X/overlay/etc/profile
new file mode 100644
index 000000000..d99b37863
--- /dev/null
+++ b/buildroot-2021.05/board/cvitek/CV181X/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/cvitek/CV181X/overlay/etc/run_usb.sh b/buildroot-2021.05/board/cvitek/CV181X/overlay/etc/run_usb.sh
new file mode 100755
index 000000000..760c70284
--- /dev/null
+++ b/buildroot-2021.05/board/cvitek/CV181X/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/cvitek/CV181X/overlay/etc/uhubon.sh b/buildroot-2021.05/board/cvitek/CV181X/overlay/etc/uhubon.sh
new file mode 100755
index 000000000..a8256765d
--- /dev/null
+++ b/buildroot-2021.05/board/cvitek/CV181X/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 $?
diff --git a/buildroot-2021.05/board/cvitek/CV181X/overlay/usr/local/bin/autologin b/buildroot-2021.05/board/cvitek/CV181X/overlay/usr/local/bin/autologin
new file mode 100755
index 000000000..6f12842ec
--- /dev/null
+++ b/buildroot-2021.05/board/cvitek/CV181X/overlay/usr/local/bin/autologin
@@ -0,0 +1,2 @@
+#! /bin/sh
+exec /bin/login -f root
diff --git a/buildroot-2021.05/configs/cvitek_CV180X_glibc_riscv64_defconfig b/buildroot-2021.05/configs/cvitek_CV180X_glibc_riscv64_defconfig
new file mode 100644
index 000000000..18929cf90
--- /dev/null
+++ b/buildroot-2021.05/configs/cvitek_CV180X_glibc_riscv64_defconfig
@@ -0,0 +1,35 @@
+BR2_riscv=y
+BR2_riscv_custom=y
+BR2_RISCV_ISA_CUSTOM_RVM=y
+BR2_RISCV_ISA_CUSTOM_RVF=y
+BR2_RISCV_ISA_CUSTOM_RVD=y
+BR2_RISCV_ISA_CUSTOM_RVC=y
+BR2_RISCV_ISA_CUSTOM_RVV0P7=y
+BR2_RISCV_ISA_CUSTOM_THEAD=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_PATH="$(CROSS_COMPILE_PATH_GLIBC_RISCV64)"
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX="riscv64-unknown-linux-gnu"
+BR2_TOOLCHAIN_EXTERNAL_HEADERS_5_10=y
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC=y
+# BR2_TOOLCHAIN_EXTERNAL_INET_RPC is not set
+BR2_TOOLCHAIN_EXTERNAL_CXX=y
+BR2_TARGET_GENERIC_HOSTNAME="cvitek"
+BR2_TARGET_GENERIC_ISSUE="Welcome to CViTek"
+BR2_TARGET_GENERIC_ROOT_PASSWD="cvitek"
+BR2_ROOTFS_OVERLAY="$(BR_OVERLAY_DIR)"
+BR2_PACKAGE_GDB=y
+BR2_PACKAGE_STRACE=y
+BR2_PACKAGE_E2FSPROGS=y
+BR2_PACKAGE_E2FSPROGS_RESIZE2FS=y
+BR2_PACKAGE_EVTEST=y
+BR2_PACKAGE_JSON_C=y
+BR2_PACKAGE_DROPBEAR=y
+BR2_PACKAGE_WPA_SUPPLICANT=y
+BR2_PACKAGE_WPA_SUPPLICANT_CLI=y
+BR2_PACKAGE_WPA_SUPPLICANT_WPA_CLIENT_SO=y
+BR2_PACKAGE_KMOD=y
+BR2_PACKAGE_UTIL_LINUX_UUIDD=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="200M"
+BR2_TARGET_ROOTFS_TAR_XZ=y
diff --git a/buildroot-2021.05/configs/cvitek_CV180X_musl_riscv64_defconfig b/buildroot-2021.05/configs/cvitek_CV180X_musl_riscv64_defconfig
index ed91ad10c..ce82ca35d 100644
--- a/buildroot-2021.05/configs/cvitek_CV180X_musl_riscv64_defconfig
+++ b/buildroot-2021.05/configs/cvitek_CV180X_musl_riscv64_defconfig
@@ -1,482 +1,35 @@
-#
-# 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/cvitek_cv180x_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_riscv_custom=y
+BR2_RISCV_ISA_CUSTOM_RVM=y
+BR2_RISCV_ISA_CUSTOM_RVF=y
+BR2_RISCV_ISA_CUSTOM_RVD=y
+BR2_RISCV_ISA_CUSTOM_RVC=y
+BR2_RISCV_ISA_CUSTOM_RVV0P7=y
+BR2_RISCV_ISA_CUSTOM_THEAD=y
 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_PATH="$(CROSS_COMPILE_PATH_MUSL_RISCV64)"
 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_TOOLCHAIN_EXTERNAL_OPENMP=y
 BR2_TARGET_GENERIC_HOSTNAME="cvitek"
 BR2_TARGET_GENERIC_ISSUE="Welcome to CViTek"
-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="cvitek"
-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/cvitek/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_ROOTFS_OVERLAY="$(BR_OVERLAY_DIR)"
 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_STRACE=y
 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_DROPBEAR=y
 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/buildroot-2021.05/configs/cvitek_CV181X_32bit_defconfig b/buildroot-2021.05/configs/cvitek_CV181X_32bit_defconfig
new file mode 100644
index 000000000..68a6ec615
--- /dev/null
+++ b/buildroot-2021.05/configs/cvitek_CV181X_32bit_defconfig
@@ -0,0 +1,23 @@
+BR2_arm=y
+BR2_cortex_a53=y
+BR2_BACKUP_SITE="https://sources.buildroot.net"
+BR2_CPAN_MIRROR="https://cpan.metacpan.org"
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
+BR2_TOOLCHAIN_EXTERNAL_PATH="$(CROSS_COMPILE_PATH_32)"
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX="arm-linux-gnueabihf"
+BR2_TOOLCHAIN_EXTERNAL_GCC_6=y
+BR2_TOOLCHAIN_EXTERNAL_HEADERS_4_6=y
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC=y
+BR2_TOOLCHAIN_EXTERNAL_CXX=y
+BR2_TOOLCHAIN_EXTERNAL_FORTRAN=y
+BR2_TOOLCHAIN_EXTERNAL_OPENMP=y
+BR2_TARGET_GENERIC_HOSTNAME="sg200x"
+BR2_TARGET_GENERIC_ISSUE="Welcome to Sg200x"
+BR2_TARGET_GENERIC_ROOT_PASSWD="sophgo"
+BR2_ROOTFS_OVERLAY="$(BR_OVERLAY_DIR)"
+BR2_PACKAGE_STRACE=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="200M"
+BR2_TARGET_ROOTFS_TAR_XZ=y
diff --git a/buildroot-2021.05/configs/cvitek_CV181X_64bit_defconfig b/buildroot-2021.05/configs/cvitek_CV181X_64bit_defconfig
new file mode 100644
index 000000000..322ccc992
--- /dev/null
+++ b/buildroot-2021.05/configs/cvitek_CV181X_64bit_defconfig
@@ -0,0 +1,22 @@
+BR2_aarch64=y
+BR2_BACKUP_SITE="https://sources.buildroot.net"
+BR2_CPAN_MIRROR="https://cpan.metacpan.org"
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
+BR2_TOOLCHAIN_EXTERNAL_PATH="$(CROSS_COMPILE_PATH_64)"
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX="aarch64-linux-gnu"
+BR2_TOOLCHAIN_EXTERNAL_GCC_6=y
+BR2_TOOLCHAIN_EXTERNAL_HEADERS_4_6=y
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC=y
+BR2_TOOLCHAIN_EXTERNAL_CXX=y
+BR2_TOOLCHAIN_EXTERNAL_FORTRAN=y
+BR2_TOOLCHAIN_EXTERNAL_OPENMP=y
+BR2_TARGET_GENERIC_HOSTNAME="sg200x"
+BR2_TARGET_GENERIC_ISSUE="Welcome to Sg200x"
+BR2_TARGET_GENERIC_ROOT_PASSWD="sophgo"
+BR2_ROOTFS_OVERLAY="$(BR_OVERLAY_DIR)"
+BR2_PACKAGE_STRACE=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="200M"
+BR2_TARGET_ROOTFS_TAR_XZ=y
diff --git a/buildroot-2021.05/configs/cvitek_CV181X_glibc_riscv64_defconfig b/buildroot-2021.05/configs/cvitek_CV181X_glibc_riscv64_defconfig
new file mode 100644
index 000000000..2d0cdede7
--- /dev/null
+++ b/buildroot-2021.05/configs/cvitek_CV181X_glibc_riscv64_defconfig
@@ -0,0 +1,35 @@
+BR2_riscv=y
+BR2_riscv_custom=y
+BR2_RISCV_ISA_CUSTOM_RVM=y
+BR2_RISCV_ISA_CUSTOM_RVF=y
+BR2_RISCV_ISA_CUSTOM_RVD=y
+BR2_RISCV_ISA_CUSTOM_RVC=y
+BR2_RISCV_ISA_CUSTOM_RVV0P7=y
+BR2_RISCV_ISA_CUSTOM_THEAD=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_PATH="$(CROSS_COMPILE_PATH_GLIBC_RISCV64)"
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX="riscv64-unknown-linux-gnu"
+BR2_TOOLCHAIN_EXTERNAL_HEADERS_5_10=y
+BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC=y
+# BR2_TOOLCHAIN_EXTERNAL_INET_RPC is not set
+BR2_TOOLCHAIN_EXTERNAL_CXX=y
+BR2_TARGET_GENERIC_HOSTNAME="sg200x"
+BR2_TARGET_GENERIC_ISSUE="Welcome to Sg200x"
+BR2_TARGET_GENERIC_ROOT_PASSWD="sophgo"
+BR2_ROOTFS_OVERLAY="$(BR_OVERLAY_DIR)"
+BR2_PACKAGE_GDB=y
+BR2_PACKAGE_STRACE=y
+BR2_PACKAGE_E2FSPROGS=y
+BR2_PACKAGE_E2FSPROGS_RESIZE2FS=y
+BR2_PACKAGE_EVTEST=y
+BR2_PACKAGE_JSON_C=y
+BR2_PACKAGE_DROPBEAR=y
+BR2_PACKAGE_WPA_SUPPLICANT=y
+BR2_PACKAGE_WPA_SUPPLICANT_CLI=y
+BR2_PACKAGE_WPA_SUPPLICANT_WPA_CLIENT_SO=y
+BR2_PACKAGE_KMOD=y
+BR2_PACKAGE_UTIL_LINUX_UUIDD=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="200M"
+BR2_TARGET_ROOTFS_TAR_XZ=y
diff --git a/buildroot-2021.05/configs/cvitek_CV181X_musl_riscv64_defconfig b/buildroot-2021.05/configs/cvitek_CV181X_musl_riscv64_defconfig
index bf2b1d064..a8346378c 100644
--- a/buildroot-2021.05/configs/cvitek_CV181X_musl_riscv64_defconfig
+++ b/buildroot-2021.05/configs/cvitek_CV181X_musl_riscv64_defconfig
@@ -1,449 +1,34 @@
-#
-# 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/cvitek_cv180x_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="$(CONFIG_DIR)/local.mk"
-BR2_GLOBAL_PATCH_DIR=""
-
-#
-# Advanced
-#
-BR2_COMPILER_PARANOID_UNSAFE_PATH=y
-# BR2_FORCE_HOST_BUILD is not set
-# BR2_REPRODUCIBLE is not set
-# BR2_PER_PACKAGE_DIRECTORIES is not set
-
-#
-# Security Hardening Options
-#
-BR2_PIC_PIE=y
-# BR2_SSP_NONE is not set
-# BR2_SSP_REGULAR is not set
-BR2_SSP_STRONG=y
-# BR2_SSP_ALL is not set
-BR2_SSP_OPTION="-fstack-protector-strong"
-# BR2_RELRO_NONE is not set
-# BR2_RELRO_PARTIAL is not set
-BR2_RELRO_FULL=y
-
-#
-# Fortify Source needs a glibc toolchain and optimization
-#
-
-#
-# Toolchain
-#
-BR2_TOOLCHAIN=y
-BR2_TOOLCHAIN_USES_MUSL=y
-# BR2_TOOLCHAIN_BUILDROOT is not set
+BR2_riscv_custom=y
+BR2_RISCV_ISA_CUSTOM_RVM=y
+BR2_RISCV_ISA_CUSTOM_RVF=y
+BR2_RISCV_ISA_CUSTOM_RVD=y
+BR2_RISCV_ISA_CUSTOM_RVC=y
+BR2_RISCV_ISA_CUSTOM_RVV0P7=y
+BR2_RISCV_ISA_CUSTOM_THEAD=y
 BR2_TOOLCHAIN_EXTERNAL=y
-
-#
-# Toolchain External Options
-#
-BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
-# BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD is not set
-BR2_TOOLCHAIN_EXTERNAL_PREINSTALLED=y
-# BR2_TOOLCHAIN_EXTERNAL_PATH="/data/sam/sdk/cv180x_v400/host-tools/gcc/riscv64-linux-musl-x86_64"
-BR2_TOOLCHAIN_EXTERNAL_PATH="$(TOPDIR)/../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_PATH="$(CROSS_COMPILE_PATH_MUSL_RISCV64)"
 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_10=y
-BR2_TOOLCHAIN_HEADERS_AT_LEAST="5.10"
-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="cvitek"
-BR2_TARGET_GENERIC_ISSUE="Welcome to CViTek"
-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="cvitek"
-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/cvitek/CV181X/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_TOOLCHAIN_EXTERNAL_OPENMP=y
+BR2_TARGET_GENERIC_HOSTNAME="sg200x"
+BR2_TARGET_GENERIC_ISSUE="Welcome to Sg200x"
+BR2_TARGET_GENERIC_ROOT_PASSWD="sophgo"
+BR2_ROOTFS_OVERLAY="$(BR_OVERLAY_DIR)"
 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_STRACE=y
 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
-
-
diff --git a/buildroot-2021.05/toolchain/helpers.mk b/buildroot-2021.05/toolchain/helpers.mk
index 17bc159f3..0b72eeca4 100644
--- a/buildroot-2021.05/toolchain/helpers.mk
+++ b/buildroot-2021.05/toolchain/helpers.mk
@@ -135,9 +135,14 @@ copy_toolchain_sysroot = \
 			$(call simplify_symlink,$$i,$(STAGING_DIR)) ; \
 		done ; \
 	fi ; \
-	if [ ! -e $(STAGING_DIR)/lib/ld*.so.* ]; then \
-		if [ -e $${ARCH_SYSROOT_DIR}/lib/ld*.so.* ]; then \
-			cp -a $${ARCH_SYSROOT_DIR}/lib/ld*.so.* $(STAGING_DIR)/lib/ ; \
+	if [ "$(TOOLCHAIN_EXTERNAL_CC)" != "" ]; then \
+		LD_NAME=`echo "" | $(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS) -v -xc - 2>&1 | grep -oP '\-dynamic-linker /lib/\K[\/\-\.\w]+'`; \
+	else \
+		LD_NAME="ld*.so.*"; \
+	fi; \
+	if [ ! -e $(STAGING_DIR)/lib/$${LD_NAME} ]; then \
+		if [ -e $${ARCH_SYSROOT_DIR}/lib/$${LD_NAME} ]; then \
+			cp -a $${ARCH_SYSROOT_DIR}/lib/$${LD_NAME} $(STAGING_DIR)/lib/ ; \
 		fi ; \
 	fi ; \
 	if [ `readlink -f $${SYSROOT_DIR}` != `readlink -f $${ARCH_SYSROOT_DIR}` ] ; then \
diff --git a/buildroot-2021.05/toolchain/toolchain-external/pkg-toolchain-external.mk b/buildroot-2021.05/toolchain/toolchain-external/pkg-toolchain-external.mk
index 6d91cb5d1..16a057905 100644
--- a/buildroot-2021.05/toolchain/toolchain-external/pkg-toolchain-external.mk
+++ b/buildroot-2021.05/toolchain/toolchain-external/pkg-toolchain-external.mk
@@ -463,6 +463,11 @@ create_lib_symlinks = \
 	ARCH_LIB_DIR="$(call toolchain_find_libdir,$(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS))" ; \
 	if [ ! -e "$${DESTDIR}/$${ARCH_LIB_DIR}" -a ! -e "$${DESTDIR}/usr/$${ARCH_LIB_DIR}" ]; then \
 		relpath="$(call relpath_prefix,$${ARCH_LIB_DIR})" ; \
+		mkdir -p `dirname "$${DESTDIR}/$${ARCH_LIB_DIR}"` ; \
+		mkdir -p `dirname "$${DESTDIR}/usr/$${ARCH_LIB_DIR}"` ; \
+		ORIGIN_ARCH_LIB_DIR=`echo $${ARCH_LIB_DIR} | sed -r -e 's/(lib(32|64))[^/]*/\1/'` ; \
+ 		ln -snf $${relpath}lib "$${DESTDIR}/$${ORIGIN_ARCH_LIB_DIR}" ; \
+ 		ln -snf $${relpath}lib "$${DESTDIR}/usr/$${ORIGIN_ARCH_LIB_DIR}" ; \
 		ln -snf $${relpath}lib "$${DESTDIR}/$${ARCH_LIB_DIR}" ; \
 		ln -snf $${relpath}lib "$${DESTDIR}/usr/$${ARCH_LIB_DIR}" ; \
 	fi