diff --git a/bsp/raspberry-pi/raspi4/.config b/bsp/raspberry-pi/raspi4/.config
new file mode 100644
index 0000000000..e300d0217b
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/.config
@@ -0,0 +1,455 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# RT-Thread Project Configuration
+#
+
+#
+# RT-Thread Kernel
+#
+CONFIG_RT_NAME_MAX=8
+# CONFIG_RT_USING_ARCH_DATA_TYPE is not set
+# CONFIG_RT_USING_SMP is not set
+CONFIG_RT_ALIGN_SIZE=4
+# CONFIG_RT_THREAD_PRIORITY_8 is not set
+CONFIG_RT_THREAD_PRIORITY_32=y
+# CONFIG_RT_THREAD_PRIORITY_256 is not set
+CONFIG_RT_THREAD_PRIORITY_MAX=32
+CONFIG_RT_TICK_PER_SECOND=100
+CONFIG_RT_USING_OVERFLOW_CHECK=y
+CONFIG_RT_USING_HOOK=y
+CONFIG_RT_USING_IDLE_HOOK=y
+CONFIG_RT_IDLE_HOOK_LIST_SIZE=4
+CONFIG_IDLE_THREAD_STACK_SIZE=2048
+CONFIG_RT_USING_TIMER_SOFT=y
+CONFIG_RT_TIMER_THREAD_PRIO=4
+CONFIG_RT_TIMER_THREAD_STACK_SIZE=2048
+CONFIG_RT_DEBUG=y
+# CONFIG_RT_DEBUG_COLOR is not set
+# CONFIG_RT_DEBUG_INIT_CONFIG is not set
+# CONFIG_RT_DEBUG_THREAD_CONFIG is not set
+# CONFIG_RT_DEBUG_SCHEDULER_CONFIG is not set
+# CONFIG_RT_DEBUG_IPC_CONFIG is not set
+# CONFIG_RT_DEBUG_TIMER_CONFIG is not set
+# CONFIG_RT_DEBUG_IRQ_CONFIG is not set
+# CONFIG_RT_DEBUG_MEM_CONFIG is not set
+# CONFIG_RT_DEBUG_SLAB_CONFIG is not set
+# CONFIG_RT_DEBUG_MEMHEAP_CONFIG is not set
+# CONFIG_RT_DEBUG_MODULE_CONFIG is not set
+
+#
+# Inter-Thread communication
+#
+CONFIG_RT_USING_SEMAPHORE=y
+CONFIG_RT_USING_MUTEX=y
+CONFIG_RT_USING_EVENT=y
+CONFIG_RT_USING_MAILBOX=y
+CONFIG_RT_USING_MESSAGEQUEUE=y
+# CONFIG_RT_USING_SIGNALS is not set
+
+#
+# Memory Management
+#
+CONFIG_RT_USING_MEMPOOL=y
+# CONFIG_RT_USING_MEMHEAP is not set
+# CONFIG_RT_USING_NOHEAP is not set
+CONFIG_RT_USING_SMALL_MEM=y
+# CONFIG_RT_USING_SLAB is not set
+# CONFIG_RT_USING_MEMTRACE is not set
+CONFIG_RT_USING_HEAP=y
+
+#
+# Kernel Device Object
+#
+CONFIG_RT_USING_DEVICE=y
+# CONFIG_RT_USING_DEVICE_OPS is not set
+# CONFIG_RT_USING_INTERRUPT_INFO is not set
+CONFIG_RT_USING_CONSOLE=y
+CONFIG_RT_CONSOLEBUF_SIZE=128
+CONFIG_RT_CONSOLE_DEVICE_NAME="uart"
+CONFIG_RT_VER_NUM=0x40003
+CONFIG_ARCH_CPU_64BIT=y
+# CONFIG_RT_USING_CPU_FFS is not set
+# CONFIG_ARCH_CPU_STACK_GROWS_UPWARD is not set
+
+#
+# RT-Thread Components
+#
+CONFIG_RT_USING_COMPONENTS_INIT=y
+CONFIG_RT_USING_USER_MAIN=y
+CONFIG_RT_MAIN_THREAD_STACK_SIZE=2048
+CONFIG_RT_MAIN_THREAD_PRIORITY=10
+
+#
+# C++ features
+#
+# CONFIG_RT_USING_CPLUSPLUS is not set
+
+#
+# Command shell
+#
+CONFIG_RT_USING_FINSH=y
+CONFIG_FINSH_THREAD_NAME="tshell"
+CONFIG_FINSH_USING_HISTORY=y
+CONFIG_FINSH_HISTORY_LINES=5
+CONFIG_FINSH_USING_SYMTAB=y
+CONFIG_FINSH_USING_DESCRIPTION=y
+# CONFIG_FINSH_ECHO_DISABLE_DEFAULT is not set
+CONFIG_FINSH_THREAD_PRIORITY=20
+CONFIG_FINSH_THREAD_STACK_SIZE=4096
+CONFIG_FINSH_CMD_SIZE=80
+# CONFIG_FINSH_USING_AUTH is not set
+CONFIG_FINSH_USING_MSH=y
+CONFIG_FINSH_USING_MSH_DEFAULT=y
+# CONFIG_FINSH_USING_MSH_ONLY is not set
+CONFIG_FINSH_ARG_MAX=10
+
+#
+# Device virtual file system
+#
+CONFIG_RT_USING_DFS=y
+CONFIG_DFS_USING_WORKDIR=y
+CONFIG_DFS_FILESYSTEMS_MAX=2
+CONFIG_DFS_FILESYSTEM_TYPES_MAX=2
+CONFIG_DFS_FD_MAX=16
+# CONFIG_RT_USING_DFS_MNTTABLE is not set
+# CONFIG_RT_USING_DFS_ELMFAT is not set
+CONFIG_RT_USING_DFS_DEVFS=y
+# CONFIG_RT_USING_DFS_ROMFS is not set
+# CONFIG_RT_USING_DFS_RAMFS is not set
+# CONFIG_RT_USING_DFS_UFFS is not set
+# CONFIG_RT_USING_DFS_JFFS2 is not set
+
+#
+# Device Drivers
+#
+CONFIG_RT_USING_DEVICE_IPC=y
+CONFIG_RT_PIPE_BUFSZ=512
+# CONFIG_RT_USING_SYSTEM_WORKQUEUE is not set
+CONFIG_RT_USING_SERIAL=y
+CONFIG_RT_SERIAL_USING_DMA=y
+CONFIG_RT_SERIAL_RB_BUFSZ=64
+# CONFIG_RT_USING_CAN is not set
+# CONFIG_RT_USING_HWTIMER is not set
+# CONFIG_RT_USING_CPUTIME is not set
+# CONFIG_RT_USING_I2C is not set
+CONFIG_RT_USING_PIN=y
+# CONFIG_RT_USING_ADC is not set
+# CONFIG_RT_USING_PWM is not set
+# CONFIG_RT_USING_MTD_NOR is not set
+# CONFIG_RT_USING_MTD_NAND is not set
+# CONFIG_RT_USING_PM is not set
+# CONFIG_RT_USING_RTC is not set
+# CONFIG_RT_USING_SDIO is not set
+# CONFIG_RT_USING_SPI is not set
+# CONFIG_RT_USING_WDT is not set
+# CONFIG_RT_USING_AUDIO is not set
+# CONFIG_RT_USING_SENSOR is not set
+# CONFIG_RT_USING_TOUCH is not set
+# CONFIG_RT_USING_HWCRYPTO is not set
+# CONFIG_RT_USING_PULSE_ENCODER is not set
+# CONFIG_RT_USING_INPUT_CAPTURE is not set
+# CONFIG_RT_USING_WIFI is not set
+
+#
+# Using USB
+#
+# CONFIG_RT_USING_USB_HOST is not set
+# CONFIG_RT_USING_USB_DEVICE is not set
+
+#
+# POSIX layer and C standard library
+#
+CONFIG_RT_USING_LIBC=y
+# CONFIG_RT_USING_PTHREADS is not set
+CONFIG_RT_USING_POSIX=y
+# CONFIG_RT_USING_POSIX_MMAP is not set
+# CONFIG_RT_USING_POSIX_TERMIOS is not set
+# CONFIG_RT_USING_POSIX_AIO is not set
+# CONFIG_RT_USING_MODULE is not set
+
+#
+# Network
+#
+
+#
+# Socket abstraction layer
+#
+# CONFIG_RT_USING_SAL is not set
+
+#
+# Network interface device
+#
+# CONFIG_RT_USING_NETDEV is not set
+
+#
+# light weight TCP/IP stack
+#
+# CONFIG_RT_USING_LWIP is not set
+
+#
+# AT commands
+#
+# CONFIG_RT_USING_AT is not set
+
+#
+# VBUS(Virtual Software BUS)
+#
+# CONFIG_RT_USING_VBUS is not set
+
+#
+# Utilities
+#
+# CONFIG_RT_USING_RYM is not set
+# CONFIG_RT_USING_ULOG is not set
+# CONFIG_RT_USING_UTEST is not set
+
+#
+# RT-Thread online packages
+#
+
+#
+# IoT - internet of things
+#
+# CONFIG_PKG_USING_PAHOMQTT is not set
+# CONFIG_PKG_USING_WEBCLIENT is not set
+# CONFIG_PKG_USING_WEBNET is not set
+# CONFIG_PKG_USING_MONGOOSE is not set
+# CONFIG_PKG_USING_MYMQTT is not set
+# CONFIG_PKG_USING_WEBTERMINAL is not set
+# CONFIG_PKG_USING_CJSON is not set
+# CONFIG_PKG_USING_JSMN is not set
+# CONFIG_PKG_USING_LIBMODBUS is not set
+# CONFIG_PKG_USING_FREEMODBUS is not set
+# CONFIG_PKG_USING_LJSON is not set
+# CONFIG_PKG_USING_EZXML is not set
+# CONFIG_PKG_USING_NANOPB is not set
+
+#
+# Wi-Fi
+#
+
+#
+# Marvell WiFi
+#
+# CONFIG_PKG_USING_WLANMARVELL is not set
+
+#
+# Wiced WiFi
+#
+# CONFIG_PKG_USING_WLAN_WICED is not set
+# CONFIG_PKG_USING_RW007 is not set
+# CONFIG_PKG_USING_COAP is not set
+# CONFIG_PKG_USING_NOPOLL is not set
+# CONFIG_PKG_USING_NETUTILS is not set
+# CONFIG_PKG_USING_PPP_DEVICE is not set
+# CONFIG_PKG_USING_AT_DEVICE is not set
+# CONFIG_PKG_USING_ATSRV_SOCKET is not set
+# CONFIG_PKG_USING_WIZNET is not set
+
+#
+# IoT Cloud
+#
+# CONFIG_PKG_USING_ONENET is not set
+# CONFIG_PKG_USING_GAGENT_CLOUD is not set
+# CONFIG_PKG_USING_ALI_IOTKIT is not set
+# CONFIG_PKG_USING_AZURE is not set
+# CONFIG_PKG_USING_TENCENT_IOTHUB is not set
+# CONFIG_PKG_USING_JIOT-C-SDK is not set
+# CONFIG_PKG_USING_NIMBLE is not set
+# CONFIG_PKG_USING_OTA_DOWNLOADER is not set
+# CONFIG_PKG_USING_IPMSG is not set
+# CONFIG_PKG_USING_LSSDP is not set
+# CONFIG_PKG_USING_AIRKISS_OPEN is not set
+# CONFIG_PKG_USING_LIBRWS is not set
+# CONFIG_PKG_USING_TCPSERVER is not set
+# CONFIG_PKG_USING_PROTOBUF_C is not set
+# CONFIG_PKG_USING_ONNX_PARSER is not set
+# CONFIG_PKG_USING_ONNX_BACKEND is not set
+# CONFIG_PKG_USING_DLT645 is not set
+# CONFIG_PKG_USING_QXWZ is not set
+# CONFIG_PKG_USING_SMTP_CLIENT is not set
+# CONFIG_PKG_USING_ABUP_FOTA is not set
+
+#
+# security packages
+#
+# CONFIG_PKG_USING_MBEDTLS is not set
+# CONFIG_PKG_USING_libsodium is not set
+# CONFIG_PKG_USING_TINYCRYPT is not set
+
+#
+# language packages
+#
+# CONFIG_PKG_USING_LUA is not set
+# CONFIG_PKG_USING_JERRYSCRIPT is not set
+# CONFIG_PKG_USING_MICROPYTHON is not set
+
+#
+# multimedia packages
+#
+# CONFIG_PKG_USING_OPENMV is not set
+# CONFIG_PKG_USING_MUPDF is not set
+# CONFIG_PKG_USING_STEMWIN is not set
+# CONFIG_PKG_USING_WAVPLAYER is not set
+# CONFIG_PKG_USING_TJPGD is not set
+
+#
+# tools packages
+#
+# CONFIG_PKG_USING_CMBACKTRACE is not set
+# CONFIG_PKG_USING_EASYFLASH is not set
+# CONFIG_PKG_USING_EASYLOGGER is not set
+# CONFIG_PKG_USING_SYSTEMVIEW is not set
+# CONFIG_PKG_USING_RDB is not set
+# CONFIG_PKG_USING_QRCODE is not set
+# CONFIG_PKG_USING_ULOG_EASYFLASH is not set
+# CONFIG_PKG_USING_ADBD is not set
+# CONFIG_PKG_USING_COREMARK is not set
+# CONFIG_PKG_USING_DHRYSTONE is not set
+# CONFIG_PKG_USING_NR_MICRO_SHELL is not set
+# CONFIG_PKG_USING_CHINESE_FONT_LIBRARY is not set
+# CONFIG_PKG_USING_LUNAR_CALENDAR is not set
+# CONFIG_PKG_USING_BS8116A is not set
+
+#
+# system packages
+#
+# CONFIG_PKG_USING_GUIENGINE is not set
+# CONFIG_PKG_USING_CAIRO is not set
+# CONFIG_PKG_USING_PIXMAN is not set
+# CONFIG_PKG_USING_LWEXT4 is not set
+# CONFIG_PKG_USING_PARTITION is not set
+# CONFIG_PKG_USING_FAL is not set
+# CONFIG_PKG_USING_SQLITE is not set
+# CONFIG_PKG_USING_RTI is not set
+# CONFIG_PKG_USING_LITTLEVGL2RTT is not set
+# CONFIG_PKG_USING_CMSIS is not set
+# CONFIG_PKG_USING_DFS_YAFFS is not set
+# CONFIG_PKG_USING_LITTLEFS is not set
+# CONFIG_PKG_USING_THREAD_POOL is not set
+# CONFIG_PKG_USING_ROBOTS is not set
+# CONFIG_PKG_USING_EV is not set
+
+#
+# peripheral libraries and drivers
+#
+# CONFIG_PKG_USING_SENSORS_DRIVERS is not set
+# CONFIG_PKG_USING_REALTEK_AMEBA is not set
+# CONFIG_PKG_USING_SHT2X is not set
+# CONFIG_PKG_USING_SHT3X is not set
+# CONFIG_PKG_USING_STM32_SDIO is not set
+# CONFIG_PKG_USING_ICM20608 is not set
+# CONFIG_PKG_USING_U8G2 is not set
+# CONFIG_PKG_USING_BUTTON is not set
+# CONFIG_PKG_USING_PCF8574 is not set
+# CONFIG_PKG_USING_SX12XX is not set
+# CONFIG_PKG_USING_SIGNAL_LED is not set
+# CONFIG_PKG_USING_LEDBLINK is not set
+# CONFIG_PKG_USING_WM_LIBRARIES is not set
+# CONFIG_PKG_USING_KENDRYTE_SDK is not set
+# CONFIG_PKG_USING_INFRARED is not set
+# CONFIG_PKG_USING_ROSSERIAL is not set
+# CONFIG_PKG_USING_AGILE_BUTTON is not set
+# CONFIG_PKG_USING_AGILE_LED is not set
+# CONFIG_PKG_USING_AT24CXX is not set
+# CONFIG_PKG_USING_MOTIONDRIVER2RTT is not set
+# CONFIG_PKG_USING_AD7746 is not set
+# CONFIG_PKG_USING_PCA9685 is not set
+# CONFIG_PKG_USING_I2C_TOOLS is not set
+# CONFIG_PKG_USING_NRF24L01 is not set
+# CONFIG_PKG_USING_TOUCH_DRIVERS is not set
+# CONFIG_PKG_USING_MAX17048 is not set
+# CONFIG_PKG_USING_RPLIDAR is not set
+# CONFIG_PKG_USING_AS608 is not set
+
+#
+# miscellaneous packages
+#
+# CONFIG_PKG_USING_LIBCSV is not set
+# CONFIG_PKG_USING_OPTPARSE is not set
+# CONFIG_PKG_USING_FASTLZ is not set
+# CONFIG_PKG_USING_MINILZO is not set
+# CONFIG_PKG_USING_QUICKLZ is not set
+# CONFIG_PKG_USING_MULTIBUTTON is not set
+# CONFIG_PKG_USING_FLEXIBLE_BUTTON is not set
+# CONFIG_PKG_USING_CANFESTIVAL is not set
+# CONFIG_PKG_USING_ZLIB is not set
+# CONFIG_PKG_USING_DSTR is not set
+# CONFIG_PKG_USING_TINYFRAME is not set
+# CONFIG_PKG_USING_KENDRYTE_DEMO is not set
+# CONFIG_PKG_USING_DIGITALCTRL is not set
+# CONFIG_PKG_USING_UPACKER is not set
+# CONFIG_PKG_USING_UPARAM is not set
+
+#
+# samples: kernel and components samples
+#
+# CONFIG_PKG_USING_KERNEL_SAMPLES is not set
+# CONFIG_PKG_USING_FILESYSTEM_SAMPLES is not set
+# CONFIG_PKG_USING_NETWORK_SAMPLES is not set
+# CONFIG_PKG_USING_PERIPHERAL_SAMPLES is not set
+# CONFIG_PKG_USING_HELLO is not set
+# CONFIG_PKG_USING_VI is not set
+# CONFIG_PKG_USING_NNOM is not set
+# CONFIG_PKG_USING_LIBANN is not set
+# CONFIG_PKG_USING_ELAPACK is not set
+# CONFIG_PKG_USING_ARMv7M_DWT is not set
+# CONFIG_PKG_USING_VT100 is not set
+# CONFIG_PKG_USING_ULAPACK is not set
+# CONFIG_PKG_USING_UKAL is not set
+
+#
+# Privated Packages of RealThread
+#
+# CONFIG_PKG_USING_CODEC is not set
+# CONFIG_PKG_USING_PLAYER is not set
+# CONFIG_PKG_USING_MPLAYER is not set
+# CONFIG_PKG_USING_PERSIMMON_SRC is not set
+# CONFIG_PKG_USING_JS_PERSIMMON is not set
+# CONFIG_PKG_USING_JERRYSCRIPT_WIN32 is not set
+
+#
+# Network Utilities
+#
+# CONFIG_PKG_USING_WICED is not set
+# CONFIG_PKG_USING_CLOUDSDK is not set
+# CONFIG_PKG_USING_POWER_MANAGER is not set
+# CONFIG_PKG_USING_RT_OTA is not set
+# CONFIG_PKG_USING_RDBD_SRC is not set
+# CONFIG_PKG_USING_RTINSIGHT is not set
+# CONFIG_PKG_USING_SMARTCONFIG is not set
+# CONFIG_PKG_USING_RTX is not set
+# CONFIG_RT_USING_TESTCASE is not set
+# CONFIG_PKG_USING_NGHTTP2 is not set
+# CONFIG_PKG_USING_AVS is not set
+# CONFIG_PKG_USING_JOYLINK is not set
+# CONFIG_PKG_USING_STS is not set
+# CONFIG_PKG_USING_DLMS is not set
+# CONFIG_PKG_USING_AUDIO_FRAMEWORK is not set
+# CONFIG_PKG_USING_ZBAR is not set
+CONFIG_BCM2711_SOC=y
+# CONFIG_BSP_SUPPORT_FPU is not set
+
+#
+# Hardware Drivers Config
+#
+
+#
+# BCM Peripheral Drivers
+#
+CONFIG_BSP_USING_UART=y
+CONFIG_RT_USING_UART0=y
+CONFIG_BSP_USING_GIC=y
+CONFIG_BSP_USING_GIC400=y
+# CONFIG_BSP_USING_GIC500 is not set
+CONFIG_BSP_USING_PIN=y
+CONFIG_BSP_USING_CORETIMER=y
+# CONFIG_BSP_USING_SYSTIMER is not set
+# CONFIG_BSP_USING_WDT is not set
+# CONFIG_BSP_USING_RTC is not set
+# CONFIG_BSP_USING_SDIO is not set
+
+#
+# Board Peripheral Drivers
+#
+# CONFIG_BSP_USING_HDMI is not set
diff --git a/bsp/raspberry-pi/raspi4/Kconfig b/bsp/raspberry-pi/raspi4/Kconfig
new file mode 100644
index 0000000000..e71ed3d54b
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/Kconfig
@@ -0,0 +1,29 @@
+mainmenu "RT-Thread Project Configuration"
+
+config BSP_DIR
+    string
+    option env="BSP_ROOT"
+    default "."
+
+config RTT_DIR
+    string
+    option env="RTT_ROOT"
+    default "../../.."
+
+config PKGS_DIR
+    string
+    option env="PKGS_ROOT"
+    default "packages"
+
+source "$RTT_DIR/Kconfig"
+source "$PKGS_DIR/Kconfig"
+
+config BCM2711_SOC
+    bool
+    select ARCH_ARM_CORTEX_A57
+    select RT_USING_COMPONENTS_INIT
+    select RT_USING_USER_MAIN
+    select ARCH_CPU_64BIT
+    default y
+
+source "driver/Kconfig"
diff --git a/bsp/raspberry-pi/raspi4/README.md b/bsp/raspberry-pi/raspi4/README.md
new file mode 100644
index 0000000000..28e00f96c0
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/README.md
@@ -0,0 +1,100 @@
+# Raspberry PI 3-64板级支持包说明
+
+## 1. 简介
+
+树莓派由注册于英国的慈善组织“Raspberry Pi 基金会”开发，莓派3有三个发行版本：
+
+* B : 4核 Broadcom BCM2837 (ARMv8-A) 1.2GHz，双核VideoCore IV GPU，1GB内存，100 Base-T Ethernet
+* B+: 4核 Broadcom BCM2837B0 Cortex-A53 (ARMv8) 1.4GHz, 1GB LPDDR2 SDRAM， GigaE over USB 2.0
+* A+: 4核 Broadcom BCM2837B0 Cortex-A53 (ARMv8) 1.4GHz, 512MB LPDDR2 SDRAM
+
+这份RT-Thread BSP是针对 Raspberry Pi 3 64位模式的一份移植，树莓派价格便宜, 使用者甚众，是研究和运行RT-Thread的可选平台之一。
+
+
+## 2. 编译说明
+
+### 2.1 Window上的环境搭建
+
+Windows环境下推荐使用[env工具][1]进行编译。
+
+首先下载Linux上的gcc工具，版本为gcc-arm-8.3选择aarch64-elf就可以。
+
+将推荐将gcc解压到`\env\tools\gnu_gcc\arm_gcc`目录下。
+
+接着修改`bsp\raspberry-pi\raspi3-64\rtconfig.py`
+
+修改路径：
+
+```
+EXEC_PATH = r'E:/env_released_1.1.2/env/tools/gnu_gcc/arm_gcc/gcc-arm-8.3-2019.03-i686-mingw32-aarch64-elf/bin'
+```
+
+然后在`bsp\raspberry-pi\raspi3-64\`下输入scons编译即可。
+
+### 2.2 Linux上的环境搭建
+
+Linux下推荐使用[gcc工具][2]。Linux版本下gcc版本可采用`gcc-arm-8.3-2019.03-x86_64-aarch64-elf`。
+
+直接进入`bsp\raspberry-pi\raspi3-64`，输入scons编译即可。
+
+
+## 3. 执行
+
+### 3.1 下载[raspbian镜像][3]，生成可以运行的raspbian SD卡
+
+Windows下，去[etcher.io][4]下载etcher,这是个可以烧写img的工具
+
+解开下载的镜像文件, linux下使用如下的命令
+
+```
+unzip 2018-06-27-raspbian-stretch-lite.zip
+```
+
+准备一张空SD卡，linux环境下，插入电脑并执行
+
+```
+sudo dd if=2018-06-27-raspbian-stretch-lite.img of=/dev/xxx bs=32M conv=fsync
+```
+
+**注意: /dev/xxx 要换成真实环境中的SD卡所在设置，千万不要弄错。**
+
+Windows环境下，执行etcher选择解压后的2018-06-27-raspbian-stretch-lite.img文件和SD卡就可以开始烧写了。
+
+最后把kernel8.img放入SD boot分区，删除其它 kernel*.img。
+
+### 3.2 准备好串口线
+
+目前版本是使用raspi3的 GPIO 14, GPIO 15来作路口输出，连线情况如下图所示(图片中的板子是pi2，GPIO引脚是一样的)：
+
+![raspi2](figures/raspi_uart.png)
+
+串口参数： 115200 8N1 ，硬件和软件流控为关。
+
+按上面的方法做好SD卡后，插入树莓派，通电可以在串口上看到如下所示的输出信息：
+
+```text
+ heap: 0x00020b20 - 0x00400000
+
+ \ | /
+- RT -     Thread Operating System
+ / | \     3.1.0 build Aug 23 2019
+ 2006 - 2019 Copyright by rt-thread team
+Hello RT-Thread!
+msh >
+```
+
+## 4. 支持情况
+
+| 驱动 | 支持情况  |  备注  |
+| ------ | ----  | :------:  |
+| UART | 支持 | UART0|
+
+## 5. 联系人信息
+
+维护人：[bernard][5]
+
+[1]: https://www.rt-thread.org/page/download.html
+[2]: https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a/downloads
+[3]: https://downloads.raspberrypi.org/raspbian_lite_latest
+[4]: https://etcher.io
+[5]: https://github.com/BernardXiong
diff --git a/bsp/raspberry-pi/raspi4/SConscript b/bsp/raspberry-pi/raspi4/SConscript
new file mode 100644
index 0000000000..c7ef7659ec
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/SConscript
@@ -0,0 +1,14 @@
+# for module compiling
+import os
+from building import *
+
+cwd = GetCurrentDir()
+objs = []
+list = os.listdir(cwd)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+
+Return('objs')
diff --git a/bsp/raspberry-pi/raspi4/SConstruct b/bsp/raspberry-pi/raspi4/SConstruct
new file mode 100644
index 0000000000..93f349aab8
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/SConstruct
@@ -0,0 +1,30 @@
+import os
+import sys
+import rtconfig
+
+from rtconfig import RTT_ROOT
+
+sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
+from building import *
+
+TARGET = 'rtthread.' + rtconfig.TARGET_EXT
+
+DefaultEnvironment(tools=[])
+env = Environment(tools = ['mingw'],
+    AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+    CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
+    CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
+    AR = rtconfig.AR, ARFLAGS = '-rc',
+    LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
+env['ASCOM'] = env['ASPPCOM']
+
+Export('RTT_ROOT')
+Export('rtconfig')
+
+# prepare building environment
+objs = PrepareBuilding(env, RTT_ROOT, has_libcpu = False)
+
+# make a building
+DoBuilding(TARGET, objs)
+
diff --git a/bsp/raspberry-pi/raspi4/applications/SConscript b/bsp/raspberry-pi/raspi4/applications/SConscript
new file mode 100644
index 0000000000..533df8ac31
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/applications/SConscript
@@ -0,0 +1,9 @@
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c') + Glob('*.cpp')
+CPPPATH = [cwd, str(Dir('#'))]
+
+group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/bsp/raspberry-pi/raspi4/applications/main.c b/bsp/raspberry-pi/raspi4/applications/main.c
new file mode 100644
index 0000000000..9664e67d01
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/applications/main.c
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <board.h>
+
+int main(int argc, char** argv)
+{
+    rt_kprintf("Hi, this is RT-Thread!!\n");
+    return 0;
+}
diff --git a/bsp/raspberry-pi/raspi4/driver/Kconfig b/bsp/raspberry-pi/raspi4/driver/Kconfig
new file mode 100644
index 0000000000..208b4b4300
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/driver/Kconfig
@@ -0,0 +1,97 @@
+
+config BSP_SUPPORT_FPU
+    bool "Using Float"
+    default n
+
+menu "Hardware Drivers Config"
+    menu "BCM Peripheral Drivers"
+        menuconfig BSP_USING_UART
+            bool "Using UART"
+            select RT_USING_SERIAL
+            default y
+
+            if BSP_USING_UART
+                config RT_USING_UART0
+                bool "Enabel UART 0"
+                default y
+            endif
+            
+        menuconfig BSP_USING_GIC
+            bool "Enable GIC"
+            select RT_USING_GIC
+            default y
+        if BSP_USING_GIC
+            config BSP_USING_GIC400
+                bool "Enable GIC400"
+                default y
+            config BSP_USING_GIC500
+                bool "Enable GIC500"
+                default n
+        endif
+
+        config BSP_USING_PIN
+            bool "Using PIN"
+            select RT_USING_PIN
+            default y
+
+        config BSP_USING_CORETIMER
+            bool "Using core timer"
+            select RT_USING_CORETIMER
+            default y
+
+        menuconfig BSP_USING_SYSTIMER
+            bool "Enable SYSTIMER"
+            select BSP_USING_SYSTIMER
+            default n
+
+        if  BSP_USING_SYSTIMER
+            config RT_USING_SYSTIMER1
+                bool "Enable sys timer1"
+                default n
+            config RT_USING_SYSTIMER3
+                bool "Enable sys timer3"
+                default n
+        endif
+
+        config BSP_USING_WDT
+            bool "Enable WDT"
+            select RT_USING_WDT
+            default n
+
+        menuconfig BSP_USING_RTC
+            bool "Enable RTC"
+            select RT_USING_RTC
+            default n
+
+        if BSP_USING_RTC
+            config BSP_USING_ALARM
+                bool "Enable Alarm"
+                select RT_USING_ALARM
+                default n
+        endif
+        
+        menuconfig BSP_USING_SDIO
+            bool "Enable SDIO"
+            select RT_USING_SDIO
+            default n
+
+        if BSP_USING_SDIO
+            config BSP_USING_SDIO0
+                bool "Enable SDIO0"
+                select RT_USING_SDIO
+                default n
+        endif
+    endmenu
+
+    menu "Board Peripheral Drivers"
+        menuconfig BSP_USING_HDMI
+            bool "Enable HDMI"
+            default n
+
+        if BSP_USING_HDMI
+            config BSP_USING_HDMI_DISPLAY
+                bool "HDMI DISPLAY"
+                default n
+        endif
+    endmenu
+endmenu
diff --git a/bsp/raspberry-pi/raspi4/driver/SConscript b/bsp/raspberry-pi/raspi4/driver/SConscript
new file mode 100644
index 0000000000..533df8ac31
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/driver/SConscript
@@ -0,0 +1,9 @@
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c') + Glob('*.cpp')
+CPPPATH = [cwd, str(Dir('#'))]
+
+group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/bsp/raspberry-pi/raspi4/driver/board.c b/bsp/raspberry-pi/raspi4/driver/board.c
new file mode 100644
index 0000000000..9716755b72
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/driver/board.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+
+#include "board.h"
+#include "drv_uart.h"
+
+#include "cp15.h"
+#include "mmu.h"
+
+static rt_uint64_t timerStep;
+// 0x40, 0x44, 0x48, 0x4c: Core 0~3 Timers interrupt control
+#define CORE0_TIMER_IRQ_CTRL    HWREG32(0xFF800040)
+#define TIMER_IRQ               30
+#define NON_SECURE_TIMER_IRQ    (1 << 1)
+
+int rt_hw_get_gtimer_frq(void);
+void rt_hw_set_gtimer_val(rt_uint64_t value);
+int rt_hw_get_gtimer_val(void);
+int rt_hw_get_cntpct_val(void);
+void rt_hw_gtimer_enable(void);
+
+void core0_timer_enable_interrupt_controller()
+{
+    CORE0_TIMER_IRQ_CTRL |= NON_SECURE_TIMER_IRQ;
+}
+
+void rt_hw_timer_isr(int vector, void *parameter)
+{
+    rt_hw_set_gtimer_val(timerStep);
+    rt_tick_increase();
+}
+
+void rt_hw_timer_init(void)
+{
+    rt_hw_interrupt_install(TIMER_IRQ, rt_hw_timer_isr, RT_NULL, "tick");
+    rt_hw_interrupt_umask(TIMER_IRQ);
+    __ISB();
+    timerStep = rt_hw_get_gtimer_frq();
+    __DSB();
+    timerStep /= RT_TICK_PER_SECOND;
+    
+    rt_hw_gtimer_enable();
+    rt_hw_set_gtimer_val(timerStep);
+    core0_timer_enable_interrupt_controller();
+}
+
+void idle_wfi(void)
+{
+    asm volatile ("wfi");
+}
+
+/**
+ *  Initialize the Hardware related stuffs. Called from rtthread_startup() 
+ *  after interrupt disabled.
+ */
+void rt_hw_board_init(void)
+{
+    mmu_init();
+    armv8_map(0, 0, 0x6400000, MEM_ATTR_MEMORY);
+    armv8_map(0xFE200000, 0xFE200000, 0x200000, MEM_ATTR_IO);//uart gpio
+    armv8_map(0xFF800000, 0xFF800000, 0x200000, MEM_ATTR_IO);//gic timer
+    mmu_enable();
+
+    /* initialize hardware interrupt */
+    rt_hw_interrupt_init(); // in libcpu/interrupt.c. Set some data structures, no operation on device
+    rt_hw_vector_init();    // in libcpu/interrupt.c. == rt_cpu_vector_set_base((rt_ubase_t)&system_vectors);
+
+    /* initialize timer for os tick */
+    rt_hw_timer_init();
+    rt_thread_idle_sethook(idle_wfi);
+
+    /* initialize uart */
+    rt_hw_uart_init();      // driver/drv_uart.c
+#ifdef RT_USING_CONSOLE
+    /* set console device */
+    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
+#endif /* RT_USING_CONSOLE */
+
+#ifdef RT_USING_HEAP
+    /* initialize memory system */
+    rt_kprintf("heap: 0x%08x - 0x%08x\n", RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
+    rt_system_heap_init(RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
+#endif
+
+#ifdef RT_USING_COMPONENTS_INIT
+    rt_components_board_init();
+#endif
+}
\ No newline at end of file
diff --git a/bsp/raspberry-pi/raspi4/driver/board.h b/bsp/raspberry-pi/raspi4/driver/board.h
new file mode 100644
index 0000000000..66805464f2
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/driver/board.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#ifndef BOARD_H__
+#define BOARD_H__
+
+#include <stdint.h>
+
+extern unsigned char __bss_start;
+extern unsigned char __bss_end;
+
+#define RT_HW_HEAP_BEGIN    (void*)&__bss_end
+#define RT_HW_HEAP_END      (void*)(RT_HW_HEAP_BEGIN + 64 * 1024 * 1024)
+
+void rt_hw_board_init(void);
+
+#endif
+
diff --git a/bsp/raspberry-pi/raspi4/driver/drv_gpio.c b/bsp/raspberry-pi/raspi4/driver/drv_gpio.c
new file mode 100644
index 0000000000..4317a358e0
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/driver/drv_gpio.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#include "drv_gpio.h"
+
+#ifdef BSP_USING_PIN
+
+static void raspi_pin_mode(struct rt_device *dev, rt_base_t pin, rt_base_t mode)
+{
+    uint32_t fselnum = pin / 10;
+    uint32_t fselrest = pin % 10;
+
+    uint32_t gpfsel = 0;
+    gpfsel &= ~((uint32_t)(0x07 << (fselrest * 3)));
+    gpfsel |= (uint32_t)(mode << (fselrest * 3));
+
+    switch (fselnum)
+    {
+    case 0:
+        GPIO_REG_GPFSEL0(GPIO_BASE) = gpfsel;
+        break;
+    case 1:
+        GPIO_REG_GPFSEL1(GPIO_BASE) = gpfsel;
+        break;
+    case 2:
+        GPIO_REG_GPFSEL2(GPIO_BASE) = gpfsel;
+        break;
+    case 3:
+        GPIO_REG_GPFSEL3(GPIO_BASE) = gpfsel;
+        break;
+    case 4:
+        GPIO_REG_GPFSEL4(GPIO_BASE) = gpfsel;
+        break;
+    case 5:
+        GPIO_REG_GPFSEL5(GPIO_BASE) = gpfsel;
+        break;
+    default:
+        break;
+    }
+}
+
+static void raspi_pin_write(struct rt_device *dev, rt_base_t pin, rt_base_t value)
+{
+    uint32_t num = pin / 32;
+
+    if(num == 0)
+    {
+        if(value == 0)
+        {
+            GPIO_REG_GPSET0(GPIO_BASE) = 1 << (pin % 32);
+        }
+        else
+        {
+            GPIO_REG_GPCLR0(GPIO_BASE) = 1 << (pin % 32);
+        }
+    }
+    else
+    {
+        if(value == 0)
+        {
+            GPIO_REG_GPSET1(GPIO_BASE) = 1 << (pin % 32);
+        }
+        else
+        {
+            GPIO_REG_GPCLR1(GPIO_BASE) = 1 << (pin % 32);
+        }
+        
+    }
+}
+
+static int raspi_pin_read(struct rt_device *device, rt_base_t pin)
+{
+    return 0;
+}
+
+static rt_err_t raspi_pin_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
+{
+    return RT_EOK;
+}
+
+static rt_err_t raspi_pin_detach_irq(struct rt_device *device, rt_int32_t pin)
+{
+    return RT_EOK;
+}
+
+rt_err_t raspi_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
+{
+    return RT_EOK;
+}
+
+static const struct rt_pin_ops ops =
+{
+    raspi_pin_mode,
+    raspi_pin_write,
+    raspi_pin_read,
+    raspi_pin_attach_irq,
+    raspi_pin_detach_irq,
+    raspi_pin_irq_enable,
+};
+#endif
+
+int rt_hw_gpio_init(void)
+{
+#ifdef BSP_USING_PIN
+    rt_device_pin_register("gpio", &ops, RT_NULL);
+#endif
+
+    return 0;
+}
+INIT_DEVICE_EXPORT(rt_hw_gpio_init);
diff --git a/bsp/raspberry-pi/raspi4/driver/drv_gpio.h b/bsp/raspberry-pi/raspi4/driver/drv_gpio.h
new file mode 100644
index 0000000000..ebc9452cec
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/driver/drv_gpio.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#ifndef __DRV_GPIO_H__
+#define __DRV_GPIO_H__
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include "board.h"
+#include "interrupt.h"
+
+#define GPIO_BASE (0xFE000000 + 0x00200000)
+
+#define GPIO_REG_GPFSEL0(BASE)             HWREG32(BASE + 0x00)
+#define GPIO_REG_GPFSEL1(BASE)             HWREG32(BASE + 0x04)
+#define GPIO_REG_GPFSEL2(BASE)             HWREG32(BASE + 0x08)
+#define GPIO_REG_GPFSEL3(BASE)             HWREG32(BASE + 0x0C)
+#define GPIO_REG_GPFSEL4(BASE)             HWREG32(BASE + 0x10)
+#define GPIO_REG_GPFSEL5(BASE)             HWREG32(BASE + 0x14)
+#define GPIO_REG_REV0(BASE)                HWREG32(BASE + 0x18)
+#define GPIO_REG_GPSET0(BASE)              HWREG32(BASE + 0x1C)
+#define GPIO_REG_GPSET1(BASE)              HWREG32(BASE + 0x20)
+#define GPIO_REG_REV1(BASE)                HWREG32(BASE + 0x24)
+#define GPIO_REG_GPCLR0(BASE)              HWREG32(BASE + 0x28)
+#define GPIO_REG_GPCLR1(BASE)              HWREG32(BASE + 0x2C)
+#define GPIO_REG_REV2(BASE)                HWREG32(BASE + 0x30)
+#define GPIO_REG_GPLEV0(BASE)              HWREG32(BASE + 0x34)
+#define GPIO_REG_GPLEV1(BASE)              HWREG32(BASE + 0x38)
+#define GPIO_REG_REV3(BASE)                HWREG32(BASE + 0x3C)
+#define GPIO_REG_GPEDS0(BASE)              HWREG32(BASE + 0x40)
+#define GPIO_REG_GPEDS1(BASE)              HWREG32(BASE + 0x44)
+#define GPIO_REG_REV4(BASE)                HWREG32(BASE + 0x48)
+#define GPIO_REG_GPREN0(BASE)              HWREG32(BASE + 0x4C)
+#define GPIO_REG_GPREN1(BASE)              HWREG32(BASE + 0x50)
+#define GPIO_REG_REV5(BASE)                HWREG32(BASE + 0x54)
+#define GPIO_REG_GPFEN0(BASE)              HWREG32(BASE + 0x58)
+#define GPIO_REG_GPFEN1(BASE)              HWREG32(BASE + 0x5C)
+#define GPIO_REG_REV6(BASE)                HWREG32(BASE + 0x60)
+#define GPIO_REG_GPHEN0(BASE)              HWREG32(BASE + 0x64)
+#define GPIO_REG_GPHEN1(BASE)              HWREG32(BASE + 0x68)
+#define GPIO_REG_REV7(BASE)                HWREG32(BASE + 0x6C)
+#define GPIO_REG_GPLEN0(BASE)              HWREG32(BASE + 0x70)
+#define GPIO_REG_GPLEN1(BASE)              HWREG32(BASE + 0x74)
+#define GPIO_REG_REV8(BASE)                HWREG32(BASE + 0x78)
+#define GPIO_REG_GPAREN0(BASE)             HWREG32(BASE + 0x7C)
+#define GPIO_REG_GPAREN1(BASE)             HWREG32(BASE + 0x80)
+#define GPIO_REG_REV11(BASE)               HWREG32(BASE + 0x84)
+#define GPIO_REG_GPAFEN0(BASE)             HWREG32(BASE + 0x88)
+#define GPIO_REG_GPAFEN1(BASE)             HWREG32(BASE + 0x8C)
+#define GPIO_REG_REV10(BASE)               HWREG32(BASE + 0x90)
+#define GPIO_REG_GPPUD(BASE)               HWREG32(BASE + 0x94)
+#define GPIO_REG_GPPUDCLK0(BASE)           HWREG32(BASE + 0x98)
+#define GPIO_REG_GPPUDCLK1(BASE)           HWREG32(BASE + 0x9C)
+#define GPIO_REG_REV9(BASE)                HWREG32(BASE + 0xA0)
+#define GPIO_REG_TEST(BASE)                HWREG32(BASE + 0xA4)
+
+typedef enum {
+    INPUT = 0b000,
+    OUTPUT = 0b001,
+    ALT0 = 0b100,
+    ALT1 = 0b101,
+    ALT2 = 0b110,
+    ALT3 = 0b111,
+    ALT4 = 0b011,
+    ALT5 = 0b010
+} GPIO_FUNC;
+
+
+int rt_hw_gpio_init(void);
+
+#endif /* __DRV_GPIO_H__ */
diff --git a/bsp/raspberry-pi/raspi4/driver/drv_uart.c b/bsp/raspberry-pi/raspi4/driver/drv_uart.c
new file mode 100644
index 0000000000..a7ac1b5892
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/driver/drv_uart.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include "board.h"
+#include "drv_uart.h"
+#include "drv_gpio.h"
+
+#define UART0_BASE            (0xFE000000 + 0x00201000)
+#define PL011_BASE            UART0_BASE
+#define IRQ_PL011             (121 + 32)
+
+#define UART_REFERENCE_CLOCK 48000000
+
+struct hw_uart_device
+{
+    rt_ubase_t hw_base;
+    rt_uint32_t irqno;
+};
+
+static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
+{
+    struct hw_uart_device *uart;
+    uint32_t bauddiv = (UART_REFERENCE_CLOCK / cfg->baud_rate)* 1000 / 16;
+    uint32_t ibrd = bauddiv / 1000;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+    if(uart->hw_base == PL011_BASE)
+    {
+        uint32_t gpfsel = 0;
+
+        gpfsel &= ~((uint32_t)(0x07 << (4 * 3)));
+        gpfsel |= (uint32_t)(ALT0 << (4 * 3));
+        GPIO_REG_GPFSEL1(GPIO_BASE) = gpfsel;
+
+        gpfsel &= ~((uint32_t)(0x07 << (5 * 3)));
+        gpfsel |= (uint32_t)(ALT0 << (5 * 3));
+        GPIO_REG_GPFSEL1(GPIO_BASE) = gpfsel;
+
+        PL011_REG_CR(uart->hw_base) = 0;/*Clear UART setting*/
+        PL011_REG_LCRH(uart->hw_base) = 0;/*disable FIFO*/
+        PL011_REG_IBRD(uart->hw_base) = ibrd;
+        PL011_REG_FBRD(uart->hw_base) = (((bauddiv - ibrd * 1000) * 64 + 500) / 1000);
+        PL011_REG_LCRH(uart->hw_base) = PL011_LCRH_WLEN_8;/*FIFO*/
+        PL011_REG_CR(uart->hw_base) = PL011_CR_UARTEN | PL011_CR_TXE | PL011_CR_RXE;/*art enable, TX/RX enable*/
+    }
+
+    return RT_EOK;
+}
+
+static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg)
+{
+    struct hw_uart_device *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+
+    switch (cmd)
+    {
+    case RT_DEVICE_CTRL_CLR_INT:
+        /* disable rx irq */
+        PL011_REG_IMSC(uart->hw_base) &= ~((uint32_t)PL011_IMSC_RXIM);
+        rt_hw_interrupt_mask(uart->irqno);
+        break;
+
+    case RT_DEVICE_CTRL_SET_INT:
+        /* enable rx irq */
+        PL011_REG_IMSC(uart->hw_base) |= PL011_IMSC_RXIM;
+        rt_hw_interrupt_umask(uart->irqno);
+        break;
+    }
+
+    return RT_EOK;
+}
+
+static int uart_putc(struct rt_serial_device *serial, char c)
+{
+    struct hw_uart_device *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+
+    while ((PL011_REG_FR(uart->hw_base) & PL011_FR_TXFF));
+    PL011_REG_DR(uart->hw_base) = (uint8_t)c;
+
+    return 1;
+}
+
+static int uart_getc(struct rt_serial_device *serial)
+{
+    int ch = -1;
+    struct hw_uart_device *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+
+    if((PL011_REG_FR(uart->hw_base) & PL011_FR_RXFE) == 0)
+    {
+        ch = PL011_REG_DR(uart->hw_base) & 0xff;
+    }
+
+    return ch;
+}
+
+static const struct rt_uart_ops _uart_ops =
+{
+    uart_configure,
+    uart_control,
+    uart_putc,
+    uart_getc,
+};
+
+static void rt_hw_uart_isr(int irqno, void *param)
+{
+    struct rt_serial_device *serial = (struct rt_serial_device*)param; 
+    rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
+    PL011_REG_ICR(UART0_BASE) = PL011_INTERRUPT_RECEIVE;
+}
+
+
+/* UART device driver structure */
+static struct hw_uart_device _uart0_device =
+{
+    PL011_BASE,
+    IRQ_PL011,
+};
+
+static struct rt_serial_device _serial0;
+
+int rt_hw_uart_init(void)
+{
+    struct hw_uart_device *uart;
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+
+    uart = &_uart0_device;
+
+    _serial0.ops    = &_uart_ops;
+    _serial0.config = config;
+
+    /* register UART1 device */
+    rt_hw_serial_register(&_serial0, "uart",
+                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+                          uart);
+    rt_hw_interrupt_install(uart->irqno, rt_hw_uart_isr, &_serial0, "uart");
+
+    return 0;
+}
diff --git a/bsp/raspberry-pi/raspi4/driver/drv_uart.h b/bsp/raspberry-pi/raspi4/driver/drv_uart.h
new file mode 100644
index 0000000000..4f23d7b46e
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/driver/drv_uart.h
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#ifndef DRV_UART_H__
+#define DRV_UART_H__
+
+// register's bit
+#define PL011_FR_RI          (1 << 8)
+#define PL011_FR_TXFE        (1 << 7)
+#define PL011_FR_RXFF        (1 << 6)
+#define PL011_FR_TXFF        (1 << 5)
+#define PL011_FR_RXFE        (1 << 4)
+#define PL011_FR_BUSY        (1 << 3)
+#define PL011_FR_DCD         (1 << 2)
+#define PL011_FR_DSR         (1 << 1)
+#define PL011_FR_CTS         (1 << 0)
+
+#define PL011_LCRH_SPS       (1 << 7)
+#define PL011_LCRH_WLEN_8    (3 << 5)
+#define PL011_LCRH_WLEN_7    (2 << 5)
+#define PL011_LCRH_WLEN_6    (1 << 5)
+#define PL011_LCRH_WLEN_5    (0 << 5)
+#define PL011_LCRH_FEN       (1 << 4)
+#define PL011_LCRH_STP2      (1 << 3)
+#define PL011_LCRH_EPS       (1 << 2)
+#define PL011_LCRH_PEN       (1 << 1)
+#define PL011_LCRH_BRK       (1 << 0)
+
+#define PL011_CR_CTSEN       (1 << 15)
+#define PL011_CR_RTSEN       (1 << 14)
+#define PL011_CR_RTS         (1 << 11)
+#define PL011_CR_DTR         (1 << 10)
+#define PL011_CR_RXE         (1 << 9)
+#define PL011_CR_TXE         (1 << 8)
+#define PL011_CR_LBE         (1 << 7)
+#define PL011_CR_SIRLP       (1 << 2)
+#define PL011_CR_SIREN       (1 << 1)
+#define PL011_CR_UARTEN      (1 << 0)
+
+#define PL011_IMSC_TXIM      (1 << 5)
+#define PL011_IMSC_RXIM      (1 << 4)
+
+#define PL011_INTERRUPT_OVERRUN_ERROR   (1 << 10)
+#define PL011_INTERRUPT_BREAK_ERROR     (1 << 9)
+#define PL011_INTERRUPT_PARITY_ERROR    (1 << 8)
+#define PL011_INTERRUPT_FRAMING_ERROR   (1 << 7)
+#define PL011_INTERRUPT_RECEIVE_TIMEOUT (1 << 6)
+#define PL011_INTERRUPT_TRANSMIT        (1 << 5)
+#define PL011_INTERRUPT_RECEIVE         (1 << 4)
+#define PL011_INTERRUPT_nUARTCTS        (1 << 1)
+
+#define PL011_REG_DR(BASE)              HWREG32(BASE + 0x00)
+#define PL011_REG_RSRECR(BASE)          HWREG32(BASE + 0x04)
+#define PL011_REG_RESERVED0(BASE)       HWREG32(BASE + 0x08)
+#define PL011_REG_FR(BASE)              HWREG32(BASE + 0x18)
+#define PL011_REG_RESERVED1(BASE)       HWREG32(BASE + 0x1C)
+#define PL011_REG_ILPR(BASE)            HWREG32(BASE + 0x20)
+#define PL011_REG_IBRD(BASE)            HWREG32(BASE + 0x24)
+#define PL011_REG_FBRD(BASE)            HWREG32(BASE + 0x28)
+#define PL011_REG_LCRH(BASE)            HWREG32(BASE + 0x2C)
+#define PL011_REG_CR(BASE)              HWREG32(BASE + 0x30)
+#define PL011_REG_IFLS(BASE)            HWREG32(BASE + 0x34)
+#define PL011_REG_IMSC(BASE)            HWREG32(BASE + 0x38)
+#define PL011_REG_RIS(BASE)             HWREG32(BASE + 0x3C)
+#define PL011_REG_MIS(BASE)             HWREG32(BASE + 0x40)
+#define PL011_REG_ICR(BASE)             HWREG32(BASE + 0x44)
+#define PL011_REG_DMACR(BASE)           HWREG32(BASE + 0x48)
+#define PL011_REG_RESERVED2(BASE)       HWREG32(BASE + 0x4C)
+#define PL011_REG_ITCR(BASE)            HWREG32(BASE + 0x80)
+#define PL011_REG_ITIP(BASE)            HWREG32(BASE + 0x84)
+#define PL011_REG_ITOP(BASE)            HWREG32(BASE + 0x88)
+#define PL011_REG_TDR(BASE)             HWREG32(BASE + 0x8C)
+
+int rt_hw_uart_init(void);
+
+#endif /* DRV_UART_H__ */
+
diff --git a/bsp/raspberry-pi/raspi4/driver/iomap.h b/bsp/raspberry-pi/raspi4/driver/iomap.h
new file mode 100644
index 0000000000..00fc2025d9
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/driver/iomap.h
@@ -0,0 +1,13 @@
+#ifndef __RASPI4_H__
+#define __RASPI4_H__
+
+#define INTC_BASE   0xff800000
+#define GIC_V2_DISTRIBUTOR_BASE     (INTC_BASE + 0x00041000)
+#define GIC_V2_CPU_INTERFACE_BASE   (INTC_BASE + 0x00042000)
+#define GIC_V2_HYPERVISOR_BASE      (INTC_BASE + 0x00044000)
+#define GIC_V2_VIRTUAL_CPU_BASE     (INTC_BASE + 0x00046000)
+
+#define GIC_PL400_DISTRIBUTOR_PPTR  GIC_V2_DISTRIBUTOR_BASE
+#define GIC_PL400_CONTROLLER_PPTR   GIC_V2_CPU_INTERFACE_BASE
+
+#endif
\ No newline at end of file
diff --git a/bsp/raspberry-pi/raspi4/link.lds b/bsp/raspberry-pi/raspi4/link.lds
new file mode 100644
index 0000000000..b7b2dcc32c
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/link.lds
@@ -0,0 +1,153 @@
+/*
+ * File      : link.lds
+ * COPYRIGHT (C) 2017, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * 2017-5-30     bernard       first version
+ */
+
+/* _EL1_STACK_SIZE = DEFINED(_EL1_STACK_SIZE) ? _EL1_STACK_SIZE : 0x20000; */
+
+SECTIONS
+{
+    . = 0x80000;
+    . = ALIGN(4096);
+    .text :
+    {
+        KEEP(*(.text.entrypoint))       /* The entry point */
+        *(.vectors)
+        *(.text)                        /* remaining code */
+        *(.text.*)                      /* remaining code */
+
+        *(.rodata)                      /* read-only data (constants) */
+        *(.rodata*)
+        *(.glue_7)
+        *(.glue_7t)
+        *(.gnu.linkonce.t*)
+
+        *(COMMON)
+        
+        /* section information for finsh shell */
+        . = ALIGN(16);
+        __fsymtab_start = .;
+        KEEP(*(FSymTab))
+        __fsymtab_end = .;
+        . = ALIGN(16);
+        __vsymtab_start = .;
+        KEEP(*(VSymTab))
+        __vsymtab_end = .;
+        . = ALIGN(16);
+
+        /* section information for initial. */
+        . = ALIGN(16);
+        __rt_init_start = .;
+        KEEP(*(SORT(.rti_fn*)))
+        __rt_init_end = .;
+        . = ALIGN(16);
+
+        . = ALIGN(16);
+        _etext = .;
+    }
+
+    .eh_frame_hdr :
+    {
+         *(.eh_frame_hdr)
+         *(.eh_frame_entry)
+    }
+    .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) }
+
+    . = ALIGN(16);
+    .data :
+    {
+     *(.data)
+     *(.data.*)
+
+     *(.data1)
+     *(.data1.*)
+
+     . = ALIGN(16);
+     _gp = ABSOLUTE(.);     /* Base of small data */
+
+     *(.sdata)
+     *(.sdata.*)
+    }
+
+    . = ALIGN(16);
+    .ctors :
+    {
+        PROVIDE(__ctors_start__ = .);
+        KEEP(*(SORT(.ctors.*)))
+        KEEP(*(.ctors))
+        PROVIDE(__ctors_end__ = .);
+    }
+
+    .dtors :
+    {
+        PROVIDE(__dtors_start__ = .);
+        KEEP(*(SORT(.dtors.*)))
+        KEEP(*(.dtors))
+        PROVIDE(__dtors_end__ = .);
+    }
+
+    . = ALIGN(16);
+    .bss :
+    {
+        PROVIDE(__bss_start = .);
+        *(.bss)
+        *(.bss.*)
+        *(.dynbss)
+        
+        PROVIDE(__bss_end = .);
+    }
+    _end = .;
+
+    /* Stabs debugging sections.  */
+    .stab          0 : { *(.stab) }
+    .stabstr       0 : { *(.stabstr) }
+    .stab.excl     0 : { *(.stab.excl) }
+    .stab.exclstr  0 : { *(.stab.exclstr) }
+    .stab.index    0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment       0 : { *(.comment) }
+    /* DWARF debug sections.
+     * Symbols in the DWARF debugging sections are relative to the beginning
+     * of the section so we begin them at 0.  */
+    /* DWARF 1 */
+    .debug          0 : { *(.debug) }
+    .line           0 : { *(.line) }
+    /* GNU DWARF 1 extensions */
+    .debug_srcinfo  0 : { *(.debug_srcinfo) }
+    .debug_sfnames  0 : { *(.debug_sfnames) }
+    /* DWARF 1.1 and DWARF 2 */
+    .debug_aranges  0 : { *(.debug_aranges) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    /* DWARF 2 */
+    .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
+    .debug_abbrev   0 : { *(.debug_abbrev) }
+    .debug_line     0 : { *(.debug_line) }
+    .debug_frame    0 : { *(.debug_frame) }
+    .debug_str      0 : { *(.debug_str) }
+    .debug_loc      0 : { *(.debug_loc) }
+    .debug_macinfo  0 : { *(.debug_macinfo) }
+    /* SGI/MIPS DWARF 2 extensions */
+    .debug_weaknames 0 : { *(.debug_weaknames) }
+    .debug_funcnames 0 : { *(.debug_funcnames) }
+    .debug_typenames 0 : { *(.debug_typenames) }
+    .debug_varnames  0 : { *(.debug_varnames) }
+}
+
+__bss_size = (__bss_end - __bss_start)>>3;
diff --git a/bsp/raspberry-pi/raspi4/rtconfig.h b/bsp/raspberry-pi/raspi4/rtconfig.h
new file mode 100644
index 0000000000..049e117559
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/rtconfig.h
@@ -0,0 +1,179 @@
+#ifndef RT_CONFIG_H__
+#define RT_CONFIG_H__
+
+/* Automatically generated file; DO NOT EDIT. */
+/* RT-Thread Project Configuration */
+
+/* RT-Thread Kernel */
+
+#define RT_NAME_MAX 8
+#define RT_ALIGN_SIZE 4
+#define RT_THREAD_PRIORITY_32
+#define RT_THREAD_PRIORITY_MAX 32
+#define RT_TICK_PER_SECOND 100
+#define RT_USING_OVERFLOW_CHECK
+#define RT_USING_HOOK
+#define RT_USING_IDLE_HOOK
+#define RT_IDLE_HOOK_LIST_SIZE 4
+#define IDLE_THREAD_STACK_SIZE 2048
+#define RT_USING_TIMER_SOFT
+#define RT_TIMER_THREAD_PRIO 4
+#define RT_TIMER_THREAD_STACK_SIZE 2048
+#define RT_DEBUG
+
+/* Inter-Thread communication */
+
+#define RT_USING_SEMAPHORE
+#define RT_USING_MUTEX
+#define RT_USING_EVENT
+#define RT_USING_MAILBOX
+#define RT_USING_MESSAGEQUEUE
+
+/* Memory Management */
+
+#define RT_USING_MEMPOOL
+#define RT_USING_SMALL_MEM
+#define RT_USING_HEAP
+
+/* Kernel Device Object */
+
+#define RT_USING_DEVICE
+#define RT_USING_CONSOLE
+#define RT_CONSOLEBUF_SIZE 128
+#define RT_CONSOLE_DEVICE_NAME "uart"
+#define RT_VER_NUM 0x40003
+#define ARCH_CPU_64BIT
+
+/* RT-Thread Components */
+
+#define RT_USING_COMPONENTS_INIT
+#define RT_USING_USER_MAIN
+#define RT_MAIN_THREAD_STACK_SIZE 2048
+#define RT_MAIN_THREAD_PRIORITY 10
+
+/* C++ features */
+
+
+/* Command shell */
+
+#define RT_USING_FINSH
+#define FINSH_THREAD_NAME "tshell"
+#define FINSH_USING_HISTORY
+#define FINSH_HISTORY_LINES 5
+#define FINSH_USING_SYMTAB
+#define FINSH_USING_DESCRIPTION
+#define FINSH_THREAD_PRIORITY 20
+#define FINSH_THREAD_STACK_SIZE 4096
+#define FINSH_CMD_SIZE 80
+#define FINSH_USING_MSH
+#define FINSH_USING_MSH_DEFAULT
+#define FINSH_ARG_MAX 10
+
+/* Device virtual file system */
+
+#define RT_USING_DFS
+#define DFS_USING_WORKDIR
+#define DFS_FILESYSTEMS_MAX 2
+#define DFS_FILESYSTEM_TYPES_MAX 2
+#define DFS_FD_MAX 16
+#define RT_USING_DFS_DEVFS
+
+/* Device Drivers */
+
+#define RT_USING_DEVICE_IPC
+#define RT_PIPE_BUFSZ 512
+#define RT_USING_SERIAL
+#define RT_SERIAL_USING_DMA
+#define RT_SERIAL_RB_BUFSZ 64
+#define RT_USING_PIN
+
+/* Using USB */
+
+
+/* POSIX layer and C standard library */
+
+#define RT_USING_LIBC
+#define RT_USING_POSIX
+
+/* Network */
+
+/* Socket abstraction layer */
+
+
+/* Network interface device */
+
+
+/* light weight TCP/IP stack */
+
+
+/* AT commands */
+
+
+/* VBUS(Virtual Software BUS) */
+
+
+/* Utilities */
+
+
+/* RT-Thread online packages */
+
+/* IoT - internet of things */
+
+
+/* Wi-Fi */
+
+/* Marvell WiFi */
+
+
+/* Wiced WiFi */
+
+
+/* IoT Cloud */
+
+
+/* security packages */
+
+
+/* language packages */
+
+
+/* multimedia packages */
+
+
+/* tools packages */
+
+
+/* system packages */
+
+
+/* peripheral libraries and drivers */
+
+
+/* miscellaneous packages */
+
+
+/* samples: kernel and components samples */
+
+
+/* Privated Packages of RealThread */
+
+
+/* Network Utilities */
+
+#define BCM2711_SOC
+
+/* Hardware Drivers Config */
+
+/* BCM Peripheral Drivers */
+
+#define BSP_USING_UART
+#define RT_USING_UART0
+#define BSP_USING_GIC
+#define BSP_USING_GIC400
+#define BSP_USING_PIN
+#define BSP_USING_CORETIMER
+
+/* Board Peripheral Drivers */
+
+
+#endif
diff --git a/bsp/raspberry-pi/raspi4/rtconfig.py b/bsp/raspberry-pi/raspi4/rtconfig.py
new file mode 100644
index 0000000000..228ec0176a
--- /dev/null
+++ b/bsp/raspberry-pi/raspi4/rtconfig.py
@@ -0,0 +1,51 @@
+import os
+
+# toolchains options
+ARCH        ='aarch64'
+CPU         ='cortex-a57'
+CROSS_TOOL  ='gcc'
+
+if os.getenv('RTT_ROOT'):
+    RTT_ROOT = os.getenv('RTT_ROOT')
+else:
+    RTT_ROOT = r'../../..'
+
+if os.getenv('RTT_CC'):
+    CROSS_TOOL = os.getenv('RTT_CC')
+
+PLATFORM    = 'gcc'
+EXEC_PATH   = r'/opt/gcc-arm-8.3-2019.03-x86_64-aarch64-elf/bin/'  
+
+BUILD = 'debug'
+
+if PLATFORM == 'gcc':
+    # toolchains
+    # PREFIX = 'arm-none-eabi-'
+    PREFIX = 'aarch64-elf-'
+    CC      = PREFIX + 'gcc'
+    CXX     = PREFIX + 'g++'
+    AS      = PREFIX + 'gcc'
+    AR      = PREFIX + 'ar'
+    LINK    = PREFIX + 'gcc'
+    TARGET_EXT = 'elf'
+    SIZE    = PREFIX + 'size'
+    OBJDUMP = PREFIX + 'objdump'
+    OBJCPY  = PREFIX + 'objcopy'
+
+    DEVICE = ' -march=armv8-a -mtune=cortex-a57'
+    CFLAGS = DEVICE + ' -Wall'
+    AFLAGS = ' -c' + ' -x assembler-with-cpp -D__ASSEMBLY__'
+    LFLAGS  = DEVICE + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,system_vectors -T link.lds'
+    CPATH   = ''
+    LPATH   = ''
+
+    if BUILD == 'debug':
+        CFLAGS += ' -O0 -gdwarf-2'
+        AFLAGS += ' -gdwarf-2'
+    else:
+        CFLAGS += ' -O2'
+
+    CXXFLAGS = CFLAGS
+
+DUMP_ACTION = OBJDUMP + ' -D -S $TARGET > rtt.asm\n'
+POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
diff --git a/libcpu/aarch64/SConscript b/libcpu/aarch64/SConscript
index 453afe4b3e..5fca2b473b 100644
--- a/libcpu/aarch64/SConscript
+++ b/libcpu/aarch64/SConscript
@@ -9,6 +9,9 @@ cwd   = GetCurrentDir()
 group = []
 list  = os.listdir(cwd)
 
+# add common code files
+group = group + SConscript(os.path.join('common', 'SConscript'))
+
 # cpu porting code files
 if rtconfig.CPU != 'common':
     group = group + SConscript(os.path.join(rtconfig.CPU, 'SConscript'))
diff --git a/libcpu/aarch64/common/SConscript b/libcpu/aarch64/common/SConscript
new file mode 100644
index 0000000000..72fb8e26c3
--- /dev/null
+++ b/libcpu/aarch64/common/SConscript
@@ -0,0 +1,24 @@
+# RT-Thread building script for component
+
+from building import *
+
+Import('rtconfig')
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c') + Glob('*.cpp') + Glob('*.S')
+CPPPATH = [cwd]
+
+group = DefineGroup('common', src, depend = [''], CPPPATH = CPPPATH)
+
+# build for sub-directory
+list = os.listdir(cwd)
+objs = []
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+group = group + objs
+
+
+Return('group')
diff --git a/libcpu/aarch64/cortex-a53/armv8.h b/libcpu/aarch64/common/armv8.h
similarity index 100%
rename from libcpu/aarch64/cortex-a53/armv8.h
rename to libcpu/aarch64/common/armv8.h
diff --git a/libcpu/aarch64/cortex-a53/cache.S b/libcpu/aarch64/common/cache.S
similarity index 100%
rename from libcpu/aarch64/cortex-a53/cache.S
rename to libcpu/aarch64/common/cache.S
diff --git a/libcpu/aarch64/cortex-a53/context_gcc.S b/libcpu/aarch64/common/context_gcc.S
similarity index 100%
rename from libcpu/aarch64/cortex-a53/context_gcc.S
rename to libcpu/aarch64/common/context_gcc.S
diff --git a/libcpu/aarch64/cortex-a53/cp15.h b/libcpu/aarch64/common/cp15.h
similarity index 100%
rename from libcpu/aarch64/cortex-a53/cp15.h
rename to libcpu/aarch64/common/cp15.h
diff --git a/libcpu/aarch64/cortex-a53/cpu.c b/libcpu/aarch64/common/cpu.c
similarity index 100%
rename from libcpu/aarch64/cortex-a53/cpu.c
rename to libcpu/aarch64/common/cpu.c
diff --git a/libcpu/aarch64/cortex-a53/cpu_gcc.S b/libcpu/aarch64/common/cpu_gcc.S
similarity index 100%
rename from libcpu/aarch64/cortex-a53/cpu_gcc.S
rename to libcpu/aarch64/common/cpu_gcc.S
diff --git a/libcpu/aarch64/common/gic/SConscript b/libcpu/aarch64/common/gic/SConscript
new file mode 100644
index 0000000000..b114ba7678
--- /dev/null
+++ b/libcpu/aarch64/common/gic/SConscript
@@ -0,0 +1,24 @@
+# RT-Thread building script for component
+
+from building import *
+
+cwd     = GetCurrentDir()
+CPPPATH = [cwd]
+
+gic400_group = Split('''
+gic_pl400.c
+''')
+
+gic500_group = Split('''
+gic_pl500.c
+''')
+
+src = ()
+if GetDepend('BSP_USING_GIC400'):
+	src = gic400_group
+if GetDepend('BSP_USING_GIC500'):
+	src = gic500_group
+
+group = DefineGroup('gic', src, depend = ['BSP_USING_GIC'], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/libcpu/aarch64/common/gic/gic_pl400.c b/libcpu/aarch64/common/gic/gic_pl400.c
new file mode 100644
index 0000000000..eb35c5b2a4
--- /dev/null
+++ b/libcpu/aarch64/common/gic/gic_pl400.c
@@ -0,0 +1,368 @@
+/*
+ * Copyright 2014, General Dynamics C4 Systems
+ *
+ * This software may be distributed and modified according to the terms of
+ * the GNU General Public License version 2. Note that NO WARRANTY is provided.
+ * See "LICENSE_GPLv2.txt" for details.
+ *
+ * @TAG(GD_GPL)
+ */
+
+#include "gic_pl400.h"
+#include "iomap.h"
+
+#define BIT(n) (1ul<<(n))
+#define MASK(n) (BIT(n)-1ul)
+
+/* Setters/getters helpers */
+#define IRQ_REG(IRQ) ((IRQ) / 32)
+#define IRQ_BIT(IRQ) BIT((IRQ) % 32)
+#define IRQ_MASK MASK(10)
+#define IS_IRQ_VALID(X) (((X)&IRQ_MASK) < SPECIAL_IRQ_START)
+
+#define CPU(X) (1<<(X))
+#define TARGET_CPU_ALLINT(CPU) ( \
+        ( ((CPU)&0xff)<<0  ) |\
+        ( ((CPU)&0xff)<<8  ) |\
+        ( ((CPU)&0xff)<<16 ) |\
+        ( ((CPU)&0xff)<<24 ) \
+    )
+#define TARGET_CPU0_ALLINT   TARGET_CPU_ALLINT(CPU(0))
+
+
+#define IRQ_SET_ALL 0xffffffff;
+
+/* Special IRQ's */
+#define SPECIAL_IRQ_START 1020
+#define IRQ_NONE          1023
+
+/* Memory map for GIC distributor */
+struct gic_dist_map {
+    uint32_t enable;                /* 0x000 */
+    uint32_t ic_type;               /* 0x004 */
+    uint32_t dist_ident;            /* 0x008 */
+    uint32_t res1[29];              /* [0x00C, 0x080) */
+
+    uint32_t group[32];          /* [0x080, 0x100) */
+
+    uint32_t enable_set[32];        /* [0x100, 0x180) */
+    uint32_t enable_clr[32];        /* [0x180, 0x200) */
+    uint32_t pending_set[32];       /* [0x200, 0x280) */
+    uint32_t pending_clr[32];       /* [0x280, 0x300) */
+    uint32_t active[32];            /* [0x300, 0x380) */
+    uint32_t active_clr[32];        /* [0x380, 0x400) */
+
+    uint32_t priority[255];         /* [0x400, 0x7FC) */
+    uint32_t res2;                  /* 0x7FC */
+
+    uint32_t targets[255];          /* [0x800, 0xBFC) */
+    uint32_t res3;                  /* 0xBFC */
+
+    uint32_t config[64];             /* [0xC00, 0xD00) */
+
+    uint32_t ppi_status;            /* [0xD00, 0xD04) */
+    uint32_t spi_status[15];        /* [0xD04, 0xD40) */
+    uint32_t res4[112];              /* [0xD40, 0xF00) */
+
+    uint32_t sgi_control;           /* 0xF00 */
+    uint32_t res5[3];               /* [0xF04, 0xF10) */
+    uint32_t sgi_pending_clr[4];    /* [0xF10, 0xF20) */
+    uint32_t sgi_pending_set[4];    /* [0xF20, 0xF30) */
+    uint32_t res10[40];             /* [0xF30, 0xFD0) */
+
+    uint32_t periph_id[8];         /* [0xFD0, 0xFF0) */
+    uint32_t component_id[4];       /* [0xFF0, 0xFFF] */
+};
+
+
+/* Memory map for GIC  cpu interface */
+struct gic_cpu_iface_map {
+    uint32_t icontrol;              /*  0x000         */
+    uint32_t pri_msk_c;             /*  0x004         */
+    uint32_t bp_c;                  /*  0x008         */
+    uint32_t int_ack;               /*  0x00C         */
+    uint32_t eoi;                   /*  0x010         */
+    uint32_t run_priority;          /*  0x014         */
+    uint32_t hi_pend;               /*  0x018         */
+    uint32_t ns_alias_bp_c;         /*  0x01C         */
+    uint32_t ns_alias_ack;          /*  0x020 GIC_PL400 only */
+    uint32_t ns_alias_eoi;          /*  0x024 GIC_PL400 only */
+    uint32_t ns_alias_hi_pend;      /*  0x028 GIC_PL400 only */
+
+    uint32_t res1[41];              /* [0x02C, 0x0D0) */
+    uint32_t active_priority[4];    /* [0x0D0, 0xC0] GIC_PL400 only */
+    uint32_t ns_active_priority[4]; /* [0xE0,0xF0] GIC_PL400 only */
+    uint32_t res4[3];               /* [0xF0, 0xFC] */
+
+    uint32_t cpu_if_ident;          /*  0x0FC         */
+    uint32_t deactive;              /* [0x1000] */
+};
+
+volatile struct gic_dist_map *gic_dist =
+    (volatile struct gic_dist_map*)(GIC_PL400_DISTRIBUTOR_PPTR);
+
+volatile struct gic_cpu_iface_map *gic_cpuiface =
+    (volatile struct gic_cpu_iface_map*)(GIC_PL400_CONTROLLER_PPTR);
+
+/* Helpers */
+static inline int
+is_irq_pending(irq_t irq)
+{
+    int word = irq / 32;
+    int bit = irq & 0x1f;
+    return !!(gic_dist->pending_set[word] & BIT(bit));
+}
+
+static inline int
+is_irq_active(irq_t irq)
+{
+    int word = irq / 32;
+    int bit = irq & 0x1f;
+    return !!(gic_dist->active[word] & BIT(bit));
+}
+
+static inline int
+is_irq_enabled(irq_t irq)
+{
+    int word = irq / 32;
+    int bit = irq & 0x1f;
+    return !!(gic_dist->enable_set[word] & BIT(bit));
+}
+
+static inline int
+is_irq_edge_triggered(irq_t irq)
+{
+    int word = irq / 16;
+    int bit = ((irq & 0xf) * 2);
+    return !!(gic_dist->config[word] & BIT(bit + 1));
+}
+
+static inline int
+is_irq_1_N(irq_t irq)
+{
+    int word = irq / 16;
+    int bit = ((irq & 0xf) * 2);
+    return !!(gic_dist->config[word] & BIT(bit + 0));
+}
+
+static inline int
+is_irq_N_N(irq_t irq)
+{
+    return !(is_irq_1_N(irq));
+}
+
+static inline void
+dist_pending_clr(irq_t irq)
+{
+    int word = irq / 32;
+    int bit = irq & 0x1f;
+    /* Using |= here is detrimental to your health */
+    gic_dist->pending_clr[word] = BIT(bit);
+}
+
+static inline void
+dist_pending_set(irq_t irq)
+{
+    int word = irq / 32;
+    int bit = irq & 0x1f;
+    gic_dist->pending_set[word] = BIT(bit);
+}
+
+static inline void
+dist_enable_clr(irq_t irq)
+{
+    int word = irq / 32;
+    int bit = irq & 0x1f;
+    /* Using |= here is detrimental to your health */
+    gic_dist->enable_clr[word] = BIT(bit);
+}
+
+static inline void
+dist_enable_set(irq_t irq)
+{
+    int word = irq / 32;
+    int bit = irq & 0x1f;
+    gic_dist->enable_set[word] = BIT(bit);
+}
+
+/**
+   DONT_TRANSLATE
+ */
+static void dist_init(void)
+{
+    int i;
+    int nirqs = 32 * ((gic_dist->ic_type & 0x1f) + 1);
+    gic_dist->enable = 0;
+
+#if 0
+    /* configure to group 0 for security */
+    for (i = 0; i < nirqs; i += 32) {
+        gic_dist->group[i / 32] = 0xffffffff;
+    }
+#endif
+
+    for (i = 0; i < nirqs; i += 32) {
+        /* disable */
+        gic_dist->enable_clr[i / 32] = IRQ_SET_ALL;
+        /* clear pending */
+        gic_dist->pending_clr[i / 32] = IRQ_SET_ALL;
+    }
+
+    /* reset interrupts priority */
+    for (i = 32; i < nirqs; i += 4) {
+        gic_dist->priority[i / 4] = 0x0;
+    }
+
+    /*
+     * reset int target to cpu 0
+     * (Should really query which processor we're running on and use that)
+     */
+    for (i = 0; i < nirqs; i += 4) {
+        gic_dist->targets[i / 4] = TARGET_CPU0_ALLINT;
+    }
+
+    /* level-triggered, 1-N */
+    for (i = 64; i < nirqs; i += 32) {
+        gic_dist->config[i / 32] = 0;
+        //gic_dist->config[i / 32] = 0x55555555;
+    }
+    /* enable the int controller */
+    gic_dist->enable = 1;
+}
+
+/**
+   DONT_TRANSLATE
+ */
+static void cpu_iface_init(void)
+{
+    uint32_t i;
+
+    /* For non-Exynos4, the registers are banked per CPU, need to clear them */
+    gic_dist->enable_clr[0] = IRQ_SET_ALL;
+    gic_dist->pending_clr[0] = IRQ_SET_ALL;
+    gic_dist->priority[0] = 0x00;
+    /* put everything in group 0 */
+
+    /* clear any software generated interrupts */
+    for (i = 0; i < 16; i += 4) {
+        gic_dist->sgi_pending_clr[i / 4] = IRQ_SET_ALL;
+    }
+
+    gic_cpuiface->icontrol = 0;
+    gic_cpuiface->pri_msk_c = 0x000000f0;
+    gic_cpuiface->bp_c = 0x00000003;
+
+    while (((i = gic_cpuiface->int_ack) & IRQ_MASK) != IRQ_NONE) {
+        gic_cpuiface->eoi = i;
+    }
+    gic_cpuiface->icontrol = 0x1;
+}
+
+/**
+   DONT_TRANSLATE
+ */
+void initIRQController(void)
+{
+    dist_init();
+    cpu_iface_init();
+}
+
+
+
+/*
+ * The only sane way to get an GIC IRQ number that can be properly
+ * ACKED later is through the int_ack register. Unfortunately, reading
+ * this register changes the interrupt state to pending so future
+ * reads will not return the same value For this reason, we have a
+ * global variable to store the IRQ number.
+ */
+static uint32_t active_irq = IRQ_NONE;
+
+/**
+   DONT_TRANSLATE
+ */
+interrupt_t
+getActiveIRQ(void)
+{
+    uint32_t irq;
+    if (!IS_IRQ_VALID(active_irq)) {
+        active_irq = gic_cpuiface->int_ack;
+    }
+
+    if (IS_IRQ_VALID(active_irq)) {
+        irq = active_irq & IRQ_MASK;
+    } else {
+        irq = 1023;
+    }
+
+    return irq;
+}
+
+/*
+ * GIC has 4 states: pending->active(+pending)->inactive
+ * seL4 expects two states: active->inactive.
+ * We ignore the active state in GIC to conform
+ */
+/**
+   DONT_TRANSLATE
+ */
+bool_t
+isIRQPending(void)
+{
+    return IS_IRQ_VALID(gic_cpuiface->hi_pend);
+}
+
+
+/**
+   DONT_TRANSLATE
+ */
+void
+maskInterrupt(bool_t disable, interrupt_t irq)
+{
+    if (disable) {
+        dist_enable_clr(irq);
+    } else {
+        dist_enable_set(irq);
+    }
+}
+
+/**
+   DONT_TRANSLATE
+ */
+void
+ackInterrupt(irq_t irq)
+{
+    if (!(IS_IRQ_VALID(active_irq) && (active_irq & IRQ_MASK) == irq)) {
+		return;
+	}
+    if (is_irq_edge_triggered(irq)) {
+        dist_pending_clr(irq);
+    }
+    gic_cpuiface->eoi = active_irq;
+    active_irq = IRQ_NONE;
+}
+
+void
+handleSpuriousIRQ(void)
+{
+}
+
+void rt_hw_interrupt_mask(int vector)
+{
+    maskInterrupt(1, vector);
+}
+
+void rt_hw_interrupt_umask(int vector)
+{
+    maskInterrupt(0, vector);
+}
+
+int rt_hw_interrupt_get_irq(void)
+{
+    return getActiveIRQ();
+}
+
+void rt_hw_interrupt_ack(int fiq_irq)
+{
+    return ackInterrupt(fiq_irq);
+}
diff --git a/libcpu/aarch64/common/gic/gic_pl400.h b/libcpu/aarch64/common/gic/gic_pl400.h
new file mode 100644
index 0000000000..a43583bd7c
--- /dev/null
+++ b/libcpu/aarch64/common/gic/gic_pl400.h
@@ -0,0 +1,35 @@
+
+#ifndef __ARCH_MACHINE_GIC_PL400_H
+#define __ARCH_MACHINE_GIC_PL400_H
+
+#include <stdint.h>
+
+typedef uint16_t interrupt_t;
+typedef uint16_t irq_t;
+typedef uint64_t  bool_t;
+
+/** MODIFIES: [*] */
+interrupt_t getActiveIRQ(void);
+/** MODIFIES: [*] */
+interrupt_t getPendingIRQ(void);
+/** MODIFIES: [*] */
+bool_t isIRQPending(void);
+/** MODIFIES: [*] */
+void maskInterrupt(bool_t disable, interrupt_t irq);
+/** MODIFIES: [*] */
+void ackInterrupt(irq_t irq);
+/** MODIFIES: [*] */
+static inline void setInterruptMode(irq_t irq, bool_t levelTrigger, bool_t polarityLow) { }
+
+/** MODIFIES: [*] */
+void initIRQController(void);
+
+void handleSpuriousIRQ(void);
+
+void rt_hw_interrupt_umask(int vector);
+
+int rt_hw_interrupt_get_irq(void);
+
+void rt_hw_interrupt_ack(int fiq_irq);
+#endif /* !__ARCH_MACHINE_GIC400_H */
+
diff --git a/libcpu/aarch64/cortex-a53/mmu.c b/libcpu/aarch64/common/mmu.c
similarity index 100%
rename from libcpu/aarch64/cortex-a53/mmu.c
rename to libcpu/aarch64/common/mmu.c
diff --git a/libcpu/aarch64/cortex-a53/mmu.h b/libcpu/aarch64/common/mmu.h
similarity index 100%
rename from libcpu/aarch64/cortex-a53/mmu.h
rename to libcpu/aarch64/common/mmu.h
diff --git a/libcpu/aarch64/cortex-a53/startup_gcc.S b/libcpu/aarch64/common/startup_gcc.S
similarity index 100%
rename from libcpu/aarch64/cortex-a53/startup_gcc.S
rename to libcpu/aarch64/common/startup_gcc.S
diff --git a/libcpu/aarch64/cortex-a53/vector_gcc.S b/libcpu/aarch64/common/vector_gcc.S
similarity index 100%
rename from libcpu/aarch64/cortex-a53/vector_gcc.S
rename to libcpu/aarch64/common/vector_gcc.S
diff --git a/libcpu/aarch64/cortex-a53/SConscript b/libcpu/aarch64/cortex-a53/SConscript
index 75e170a0cf..c6a4817802 100644
--- a/libcpu/aarch64/cortex-a53/SConscript
+++ b/libcpu/aarch64/cortex-a53/SConscript
@@ -1,16 +1,13 @@
+# RT-Thread building script for component
+
 from building import *
 
+Import('rtconfig')
+
 cwd     = GetCurrentDir()
-src     = Glob('*.c') + Glob('*.cpp')
-asm_src = Split('''
-context_gcc.S
-vector_gcc.S
-entry_point.S
-cpu_gcc.S
-cache.S
-''')
+src     = Glob('*.c') + Glob('*.cpp') + Glob('*.S')
 CPPPATH = [cwd]
 
-group = DefineGroup('cpu', src + asm_src, depend = [''], CPPPATH = CPPPATH)
+group = DefineGroup('common', src, depend = [''], CPPPATH = CPPPATH)
 
 Return('group')
diff --git a/libcpu/aarch64/cortex-a53/interrupt.h b/libcpu/aarch64/cortex-a53/interrupt.h
index 3533d3818c..8e741ed4e6 100644
--- a/libcpu/aarch64/cortex-a53/interrupt.h
+++ b/libcpu/aarch64/cortex-a53/interrupt.h
@@ -1,11 +1,11 @@
-
 /*
  * Copyright (c) 2006-2020, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
- * Date           Author       Notes
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
  */
 
 #ifndef __INTERRUPT_H__
@@ -19,8 +19,6 @@
 #define INT_IRQ     0x00
 #define INT_FIQ     0x01
 
-//void rt_hw_vector_init(void);
-
 void rt_hw_interrupt_init(void);
 void rt_hw_interrupt_mask(int vector);
 void rt_hw_interrupt_umask(int vector);
diff --git a/libcpu/aarch64/cortex-a57/SConscript b/libcpu/aarch64/cortex-a57/SConscript
new file mode 100644
index 0000000000..c6a4817802
--- /dev/null
+++ b/libcpu/aarch64/cortex-a57/SConscript
@@ -0,0 +1,13 @@
+# RT-Thread building script for component
+
+from building import *
+
+Import('rtconfig')
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c') + Glob('*.cpp') + Glob('*.S')
+CPPPATH = [cwd]
+
+group = DefineGroup('common', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/libcpu/aarch64/cortex-a57/entry_point.S b/libcpu/aarch64/cortex-a57/entry_point.S
new file mode 100644
index 0000000000..6d2c69226b
--- /dev/null
+++ b/libcpu/aarch64/cortex-a57/entry_point.S
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Date           Author       Notes
+ * 2020-01-15     bigmagic    the first version
+ */
+
+.section ".text.entrypoint"
+
+.set EL1_stack,         __el1_stack
+
+.global _start
+
+// This symbol is set to 0x80000 in ld script. That is the address that raspi3's firmware
+// loads 'kernel8.img' file in.
+_start:
+    // read cpu id, stop slave cores
+    mrs     x1, mpidr_el1            // MPIDR_EL1: Multi-Processor Affinity Register
+    and     x1, x1, #3
+    cbz     x1, .L__cpu_0             // .L prefix is the local label in ELF 
+
+    // cpu id > 0, stop
+    // cpu id == 0 will also goto here after returned from entry() if possible
+.L__current_cpu_idle:
+    wfe
+    b       .L__current_cpu_idle
+
+.L__cpu_0:  // cpu id == 0
+
+    // set stack before our code
+
+	/* Define stack pointer for current exception level */
+	// ldr	x2, =EL1_stack
+	// mov	sp, x2
+
+    ldr     x1, =_start
+
+    // set up EL1
+    mrs     x0, CurrentEL           // CurrentEL Register. bit 2, 3. Others reserved
+    and     x0, x0, #12             // clear reserved bits
+
+    // running at EL3?
+    cmp     x0, #12                // 1100b. So, EL3
+    bne     .L__not_in_el3         // 11?  !EL3 -> 5:
+
+    // should never be executed, just for completeness. (EL3)
+    mov     x2, #0x5b1
+    msr     scr_el3, x2            // SCR_ELn  Secure Configuration Register
+    mov     x2, #0x3c9
+    msr     spsr_el3, x2           // SPSR_ELn. Saved Program Status Register. 1111001001
+    adr     x2, .L__not_in_el3   
+    msr     elr_el3, x2
+    eret                           // Exception Return: from EL3, continue from .L__not_in_el3
+
+    // running at EL2 or EL1
+.L__not_in_el3:    
+    cmp     x0, #4                 // 0x04  0100 EL1
+    beq     .L__in_el1             // EL1 -> 5:
+
+    // in EL2
+    msr     sp_el1, x1             // Set sp of EL1 to _start
+
+    // enable CNTP for EL1
+    mrs     x0, cnthctl_el2         // Counter-timer Hypervisor Control register
+    orr     x0, x0, #3
+    msr     cnthctl_el2, x0
+    msr     cntvoff_el2, xzr
+
+    // enable AArch64 in EL1
+    mov     x0, #(1 << 31)          // AArch64
+    orr     x0, x0, #(1 << 1)       // SWIO hardwired on Pi3
+    msr     hcr_el2, x0
+    mrs     x0, hcr_el2
+
+    // change execution level to EL1
+    mov     x2, #0x3c4
+    msr     spsr_el2, x2        // 1111000100
+    adr     x2, .L__in_el1
+    msr     elr_el2, x2
+    eret                        // exception return. from EL2. continue from .L__in_el1
+
+.L__in_el1:
+    mov     sp, x1             // in EL1. Set sp to _start
+
+    // Set CPACR_EL1 (Architecture Feature Access Control Register) to avoid trap from SIMD or float point instruction
+    mov     x1, #0x00300000       // Don't trap any SIMD/FP instructions in both EL0 and EL1
+    msr     cpacr_el1, x1
+
+    mrs x1, sctlr_el1
+    orr x1, x1, #(1 << 12)
+    bic x1, x1, #(3 << 3)
+    bic x1, x1, #(1 << 1)
+    msr sctlr_el1, x1
+
+    // clear bss
+    ldr     x1, =__bss_start
+    ldr     w2, =__bss_size
+
+.L__clean_bss_loop:
+    cbz     w2, .L__jump_to_entry
+    str     xzr, [x1], #8
+    sub     w2, w2, #1
+    cbnz    w2, .L__clean_bss_loop
+
+    // jump to C code, should not return
+.L__jump_to_entry:
+    bl      entry
+    // for failsafe, halt this core too
+    b       .L__current_cpu_idle
diff --git a/libcpu/aarch64/cortex-a57/interrupt.c b/libcpu/aarch64/cortex-a57/interrupt.c
new file mode 100644
index 0000000000..d770259d61
--- /dev/null
+++ b/libcpu/aarch64/cortex-a57/interrupt.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <gic_pl400.h>
+#include <board.h>
+#include <armv8.h>
+
+#define MAX_HANDLERS                256
+
+#ifdef RT_USING_SMP
+#define rt_interrupt_nest rt_cpu_self()->irq_nest
+#else
+extern volatile rt_uint8_t rt_interrupt_nest;
+#endif
+
+extern int system_vectors;
+
+/* exception and interrupt handler table */
+struct rt_irq_desc isr_table[MAX_HANDLERS];
+
+rt_ubase_t rt_interrupt_from_thread;
+rt_ubase_t rt_interrupt_to_thread;
+rt_ubase_t rt_thread_switch_interrupt_flag;
+
+void rt_hw_vector_init(void)
+{
+    rt_hw_set_current_vbar((rt_ubase_t)&system_vectors);  // cpu_gcc.S
+}
+
+/**
+ * This function will initialize hardware interrupt
+ */
+void rt_hw_interrupt_init(void)
+{
+    initIRQController();
+}
+
+/**
+ * This function will install a interrupt service routine to a interrupt.
+ * @param vector the interrupt number
+ * @param new_handler the interrupt service routine to be installed
+ * @param old_handler the old interrupt service routine
+ */
+rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
+        void *param, const char *name)
+{
+    rt_isr_handler_t old_handler = RT_NULL;
+
+    if (vector < MAX_HANDLERS)
+    {
+        old_handler = isr_table[vector].handler;
+
+        if (handler != RT_NULL)
+        {
+#ifdef RT_USING_INTERRUPT_INFO
+            rt_strncpy(isr_table[vector].name, name, RT_NAME_MAX);
+#endif /* RT_USING_INTERRUPT_INFO */
+            isr_table[vector].handler = handler;
+            isr_table[vector].param = param;
+        }
+    }
+
+    return old_handler;
+}
\ No newline at end of file
diff --git a/libcpu/aarch64/cortex-a57/interrupt.h b/libcpu/aarch64/cortex-a57/interrupt.h
new file mode 100644
index 0000000000..0d2d4867c7
--- /dev/null
+++ b/libcpu/aarch64/cortex-a57/interrupt.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#ifndef __INTERRUPT_H__
+#define __INTERRUPT_H__
+
+#include <rthw.h>
+#include <board.h>
+
+#define INT_IRQ     0x00
+#define INT_FIQ     0x01
+
+void rt_hw_interrupt_init(void);
+void rt_hw_interrupt_mask(int vector);
+void rt_hw_interrupt_umask(int vector);
+
+rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
+        void *param, const char *name);
+
+#endif
diff --git a/libcpu/aarch64/cortex-a57/stack.c b/libcpu/aarch64/cortex-a57/stack.c
new file mode 100644
index 0000000000..68222c2c67
--- /dev/null
+++ b/libcpu/aarch64/cortex-a57/stack.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2006-2019, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-09-23     Bernard      the first version
+ * 2011-10-05     Bernard      add thumb mode
+ */
+#include <rtthread.h>
+#include <board.h>
+
+#include <armv8.h>
+
+#define INITIAL_SPSR_EL3 (PSTATE_EL3 | SP_EL0)
+#define INITIAL_SPSR_EL2 (PSTATE_EL2 | SP_EL0)
+#define INITIAL_SPSR_EL1 (PSTATE_EL1 | SP_EL0)
+
+/**
+ * This function will initialize thread stack
+ *
+ * @param tentry the entry of thread
+ * @param parameter the parameter of entry 
+ * @param stack_addr the beginning stack address
+ * @param texit the function will be called when thread exit
+ *
+ * @return stack address
+ */
+rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
+	rt_uint8_t *stack_addr, void *texit)
+{
+	rt_ubase_t *stk;
+	rt_ubase_t current_el;
+
+	stk 	 = (rt_ubase_t*)stack_addr;
+
+	*(--stk) = ( rt_ubase_t ) 11;			/* X1 */
+	*(--stk) = ( rt_ubase_t ) parameter; 	/* X0 */
+	*(--stk) = ( rt_ubase_t ) 33;			/* X3 */
+	*(--stk) = ( rt_ubase_t ) 22;			/* X2 */
+	*(--stk) = ( rt_ubase_t ) 55;			/* X5 */
+	*(--stk) = ( rt_ubase_t ) 44;			/* X4 */
+	*(--stk) = ( rt_ubase_t ) 77;			/* X7 */
+	*(--stk) = ( rt_ubase_t ) 66;			/* X6 */
+	*(--stk) = ( rt_ubase_t ) 99;			/* X9 */
+	*(--stk) = ( rt_ubase_t ) 88;			/* X8 */
+	*(--stk) = ( rt_ubase_t ) 11;			/* X11 */
+	*(--stk) = ( rt_ubase_t ) 10;			/* X10 */
+	*(--stk) = ( rt_ubase_t ) 13;			/* X13 */
+	*(--stk) = ( rt_ubase_t ) 12;			/* X12 */
+	*(--stk) = ( rt_ubase_t ) 15;			/* X15 */
+	*(--stk) = ( rt_ubase_t ) 14;			/* X14 */
+	*(--stk) = ( rt_ubase_t ) 17;			/* X17 */
+	*(--stk) = ( rt_ubase_t ) 16;			/* X16 */
+	*(--stk) = ( rt_ubase_t ) 19;			/* X19 */
+	*(--stk) = ( rt_ubase_t ) 18;			/* X18 */
+	*(--stk) = ( rt_ubase_t ) 21;			/* X21 */
+	*(--stk) = ( rt_ubase_t ) 20;			/* X20 */
+	*(--stk) = ( rt_ubase_t ) 23;			/* X23 */
+	*(--stk) = ( rt_ubase_t ) 22;			/* X22 */
+	*(--stk) = ( rt_ubase_t ) 25;			/* X25 */
+	*(--stk) = ( rt_ubase_t ) 24;			/* X24 */
+	*(--stk) = ( rt_ubase_t ) 27;			/* X27 */
+	*(--stk) = ( rt_ubase_t ) 26;			/* X26 */
+	*(--stk) = ( rt_ubase_t ) 29;			/* X29 */
+	*(--stk) = ( rt_ubase_t ) 28;			/* X28 */
+	*(--stk) = ( rt_ubase_t ) 0;			/* XZR - has no effect, used so there are an even number of registers. */
+	*(--stk) = ( rt_ubase_t ) texit;		/* X30 - procedure call link register. */
+
+	current_el = rt_hw_get_current_el();
+
+	if(current_el == 3)
+	{
+		*(--stk) = INITIAL_SPSR_EL3;
+	}
+	else if(current_el == 2)
+	{
+		*(--stk) = INITIAL_SPSR_EL2;
+	}
+	else
+	{
+		*(--stk) = INITIAL_SPSR_EL1;
+	}
+
+	*(--stk) = ( rt_ubase_t ) tentry; 		/* Exception return address. */
+
+	/* return task's current stack address */
+	return (rt_uint8_t *)stk;
+}
diff --git a/libcpu/aarch64/cortex-a57/trap.c b/libcpu/aarch64/cortex-a57/trap.c
new file mode 100644
index 0000000000..d93aa18fd6
--- /dev/null
+++ b/libcpu/aarch64/cortex-a57/trap.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * 
+ * Date           Author       Notes
+ * 2018-10-06     ZhaoXiaowei    the first version
+ */
+
+#include <rtthread.h>
+#include <rthw.h>
+
+#include "interrupt.h"
+#include "armv8.h"
+
+extern struct rt_thread *rt_current_thread;
+#ifdef RT_USING_FINSH
+extern long list_thread(void);
+#endif
+
+/**
+ * this function will show registers of CPU
+ *
+ * @param regs the registers point
+ */
+void rt_hw_show_register(struct rt_hw_exp_stack *regs)
+{
+    rt_kprintf("Execption:\n");
+    rt_kprintf("r00:0x%16.16lx r01:0x%16.16lx r02:0x%16.16lx r03:0x%16.16lx\n", regs->x0, regs->x1, regs->x2, regs->x3);
+    rt_kprintf("r04:0x%16.16lx r05:0x%16.16lx r06:0x%16.16lx r07:0x%16.16lx\n", regs->x4, regs->x5, regs->x6, regs->x7);
+	rt_kprintf("r08:0x%16.16lx r09:0x%16.16lx r10:0x%16.16lx r11:0x%16.16lx\n", regs->x8, regs->x9, regs->x10, regs->x11);
+	rt_kprintf("r12:0x%16.16lx r13:0x%16.16lx r14:0x%16.16lx r15:0x%16.16lx\n", regs->x12, regs->x13, regs->x14, regs->x15);
+	rt_kprintf("r16:0x%16.16lx r17:0x%16.16lx r18:0x%16.16lx r19:0x%16.16lx\n", regs->x16, regs->x17, regs->x18, regs->x19);
+	rt_kprintf("r20:0x%16.16lx r21:0x%16.16lx r22:0x%16.16lx r23:0x%16.16lx\n", regs->x20, regs->x21, regs->x22, regs->x23);
+    rt_kprintf("r24:0x%16.16lx r25:0x%16.16lx r26:0x%16.16lx r27:0x%16.16lx\n", regs->x24, regs->x25, regs->x26, regs->x27);
+	rt_kprintf("r28:0x%16.16lx r29:0x%16.16lx r30:0x%16.16lx\n", regs->x28, regs->x29, regs->x30);
+	rt_kprintf("spsr:0x%16.16lx\n", regs->spsr);
+	rt_kprintf("return pc:0x%16.16lx\n", regs->pc);
+}
+
+/**
+ * When comes across an instruction which it cannot handle,
+ * it takes the undefined instruction trap.
+ *
+ * @param regs system registers
+ *
+ * @note never invoke this function in application
+ */
+void rt_hw_trap_error(struct rt_hw_exp_stack *regs)
+{
+    rt_kprintf("error exception:\n");
+    rt_hw_show_register(regs);
+#ifdef RT_USING_FINSH
+    list_thread();
+#endif
+    rt_hw_cpu_shutdown();
+}
+
+#define GIC_ACK_INTID_MASK              0x000003ff
+
+int rt_hw_interrupt_get_irq(void);
+void rt_hw_interrupt_ack(int fiq_irq);
+
+void rt_hw_trap_irq(void)
+{
+    void *param;
+    int ir; 
+    rt_isr_handler_t isr_func;
+    extern struct rt_irq_desc isr_table[];
+
+    ir = rt_hw_interrupt_get_irq();
+    if (ir == 1023)
+    {
+        /* Spurious interrupt */
+        return;
+    }
+
+    /* get interrupt service routine */
+    isr_func = isr_table[ir].handler;
+#ifdef RT_USING_INTERRUPT_INFO
+    isr_table[ir].counter++;
+#endif
+    if (isr_func)
+    {
+        /* Interrupt for myself. */
+        param = isr_table[ir].param;
+        /* turn to interrupt service routine */
+        isr_func(ir, param);
+    }
+
+    /* end of interrupt */
+    rt_hw_interrupt_ack(ir);
+
+}
+
+void rt_hw_trap_fiq(void)
+{
+}