diff -Nuar at91bootstrap/build.sh at91bootstrap-sama5d4/build.sh
--- at91bootstrap/build.sh	1970-01-01 08:00:00.000000000 +0800
+++ at91bootstrap-sama5d4/build.sh	2019-08-22 18:54:20.707235362 +0800
@@ -0,0 +1,71 @@
+#!/bin/bash
+
+BOARD=sama5d4
+TFTP_PATH=/tftp
+IMGS_PATH=../images
+IMG_NAME=bootstrap-${BOARD}.bin
+
+CROSSTOOL=/opt/buildroot/cortex-a5/bin/arm-linux-
+JOBS=`cat /proc/cpuinfo |grep "processor"|wc -l`
+
+
+function do_clean()
+{
+    make CROSS_COMPILE=${CROSSTOOL} mrproper
+    find -iname "*.pyc" | xargs rm -rf {} \;
+    rm -f $IMG_NAME
+    rm -f cscope* tags
+}
+
+function do_modify()
+{
+    grep "arm-linux-gnueabi" Makefile > /dev/null
+
+    if [ $? == 0  ] ; then
+        return ;
+    fi
+
+    echo "Modify Makefile for  ARCH and cross compiler"
+    sed -i -e "s|^CROSS_COMPILE=.*|CROSS_COMPILE=${CROSSTOOL}|g" Makefile
+}
+
+function do_build()
+{
+    if [ ! -f .config ] ; then
+        echo "cp .cfg-${BOARD} .config"
+        cp .cfg-${BOARD} .config
+    fi
+
+    make 
+
+    cp binaries/sama5d4_xplained-nandflashboot-uboot-3.8.13.bin bootstrap-${BOARD}.bin
+
+    chmod a+x ${IMG_NAME}
+}
+
+function do_install()
+{
+    if [ -d $TFTP_PATH ] ;then 
+        cp ${IMG_NAME} $TFTP_PATH
+    fi
+
+    if [ -d ${IMGS_PATH} ] ; then
+        cp ${IMG_NAME} $IMGS_PATH
+    fi
+}
+
+if [ "$1" == "clean" ] ; then 
+
+    do_clean
+    exit 0;
+fi
+
+do_modify
+
+set -e
+
+do_build
+
+do_install
+
+
diff -Nuar at91bootstrap/.cfg-sama5d4 at91bootstrap-sama5d4/.cfg-sama5d4
--- at91bootstrap/.cfg-sama5d4	1970-01-01 08:00:00.000000000 +0800
+++ at91bootstrap-sama5d4/.cfg-sama5d4	2019-08-22 13:18:47.498849159 +0800
@@ -0,0 +1,274 @@
+#
+# Automatically generated make config: don't edit
+# Thu Aug 22 13:18:42 2019
+#
+HAVE_DOT_CONFIG=y
+# CONFIG_AT91SAM9260EK is not set
+# CONFIG_AT91SAM9261EK is not set
+# CONFIG_AT91SAM9263EK is not set
+# CONFIG_AT91SAM9RLEK is not set
+# CONFIG_AT91SAM9XEEK is not set
+# CONFIG_AT91SAM9G10EK is not set
+# CONFIG_AT91SAM9G20EK is not set
+# CONFIG_AT91SAM9M10G45EK is not set
+# CONFIG_AT91SAM9X5EK is not set
+# CONFIG_AT91SAM9N12EK is not set
+# CONFIG_SAMA5D3XEK is not set
+# CONFIG_SAMA5D3_XPLAINED is not set
+# CONFIG_SAMA5D3X_CMP is not set
+# CONFIG_SAMA5D4EK is not set
+CONFIG_SAMA5D4_XPLAINED=y
+# CONFIG_SAMA5D2_PTC_EK is not set
+# CONFIG_SAMA5D2_XPLAINED is not set
+# CONFIG_SAMA5D27_SOM1_EK is not set
+# CONFIG_SAMA5D2_LPDDR2SIP_VB is not set
+# CONFIG_SAMA5D2_ICP is not set
+# CONFIG_VINCO is not set
+# CONFIG_AT91SAM9X5_ARIA is not set
+# CONFIG_AT91SAM9X5_ARIETTA is not set
+# CONFIG_SAMA5D3_ACQUA is not set
+# CONFIG_SAMA5D2_ROADRUNNER is not set
+# CONFIG_CORE9G25 is not set
+# CONFIG_SAMA5D3_LINEA is not set
+# CONFIG_PICOSAM9G45 is not set
+# CONFIG_SAMA5D3_STEPHAN is not set
+CONFIG_BOARDNAME="sama5d4_xplained"
+SAMA5D4=y
+CONFIG_MACH_TYPE="9999"
+# CONFIG_OVERRIDE_MACH_TYPE is not set
+CONFIG_LINK_ADDR="0x200000"
+CONFIG_TOP_OF_MEMORY="0x210000"
+
+#
+# Main Crystal configuration
+#
+CONFIG_CRYSTAL_12_000MHZ=y
+# CONFIG_CRYSTAL_16_000MHZ is not set
+# CONFIG_CRYSTAL_16_36766MHZ is not set
+# CONFIG_CRYSTAL_18_432MHZ is not set
+# CONFIG_CRYSTAL_24_000MHZ is not set
+# CONFIG_MCK_BYPASS is not set
+ALLOW_CRYSTAL_12_000MHZ=y
+CONFIG_CRYSTAL="CRYSTAL_12_000MHZ"
+# CONFIG_CPU_CLK_166MHZ is not set
+# CONFIG_CPU_CLK_180MHZ is not set
+# CONFIG_CPU_CLK_200MHZ is not set
+# CONFIG_CPU_CLK_240MHZ is not set
+# CONFIG_CPU_CLK_266MHZ is not set
+# CONFIG_CPU_CLK_332MHZ is not set
+# CONFIG_CPU_CLK_348MHZ is not set
+# CONFIG_CPU_CLK_396MHZ is not set
+# CONFIG_CPU_CLK_400MHZ is not set
+# CONFIG_CPU_CLK_444MHZ is not set
+# CONFIG_CPU_CLK_492MHZ is not set
+# CONFIG_CPU_CLK_498MHZ is not set
+# CONFIG_CPU_CLK_510MHZ is not set
+# CONFIG_CPU_CLK_528MHZ is not set
+# CONFIG_CPU_CLK_594MHZ is not set
+CONFIG_CPU_CLK_600MHZ=y
+ALLOW_CPU_CLK_444MHZ=y
+ALLOW_CPU_CLK_510MHZ=y
+ALLOW_CPU_CLK_528MHZ=y
+ALLOW_CPU_CLK_594MHZ=y
+ALLOW_CPU_CLK_600MHZ=y
+# DISABLE_CPU_CLK_240MHZ is not set
+# CONFIG_BUS_SPEED_83MHZ is not set
+# CONFIG_BUS_SPEED_90MHZ is not set
+# CONFIG_BUS_SPEED_100MHZ is not set
+# CONFIG_BUS_SPEED_116MHZ is not set
+# CONFIG_BUS_SPEED_124MHZ is not set
+# CONFIG_BUS_SPEED_133MHZ is not set
+# CONFIG_BUS_SPEED_148MHZ is not set
+# CONFIG_BUS_SPEED_164MHZ is not set
+# CONFIG_BUS_SPEED_166MHZ is not set
+# CONFIG_BUS_SPEED_170MHZ is not set
+# CONFIG_BUS_SPEED_176MHZ is not set
+CONFIG_BUS_SPEED_200MHZ=y
+SUPPORT_BUS_SPEED_148MHZ=y
+SUPPORT_BUS_SPEED_170MHZ=y
+SUPPORT_BUS_SPEED_176MHZ=y
+SUPPORT_BUS_SPEED_200MHZ=y
+CPU_HAS_TRUSTZONE=y
+CONFIG_CPU_V7=y
+CONFIG_HAS_PMIC_ACT8865=y
+CONFIG_SUPPORT_PM=y
+# CONFIG_HAS_ONE_WIRE is not set
+CONFIG_HAS_EEPROM=y
+CONFIG_HAS_EHT0_PHY=y
+# CONFIG_HAS_EHT1_PHY is not set
+# CONFIG_HAS_AUDIO_CODEC is not set
+CONFIG_HAS_HDMI=y
+# CORE_ARM926EJS is not set
+CORE_CORTEX_A5=y
+CPU_HAS_SCKC=y
+CPU_HAS_H32MXDIV=y
+CPU_HAS_HSMCI0=y
+CPU_HAS_HSMCI1=y
+# CPU_HAS_HSMCI2 is not set
+# CPU_HAS_MCI0 is not set
+# CPU_HAS_MCI1 is not set
+# CPU_HAS_SDHC0 is not set
+# CPU_HAS_SDHC1 is not set
+CPU_HAS_SPI0=y
+CPU_HAS_SPI1=y
+# CPU_HAS_SPI0_IOSET1 is not set
+# CPU_HAS_SPI0_IOSET2 is not set
+# CPU_HAS_SPI1_IOSET1 is not set
+# CPU_HAS_SPI1_IOSET2 is not set
+# CPU_HAS_SPI1_IOSET3 is not set
+# CPU_HAS_QSPI0 is not set
+# CPU_HAS_QSPI1 is not set
+# CPU_HAS_QSPI0_IOSET1 is not set
+# CPU_HAS_QSPI0_IOSET2 is not set
+# CPU_HAS_QSPI0_IOSET3 is not set
+# CPU_HAS_QSPI1_IOSET1 is not set
+# CPU_HAS_QSPI1_IOSET2 is not set
+# CPU_HAS_QSPI1_IOSET3 is not set
+# BOARD_HAS_2_BANKS is not set
+# CPU_HAS_SCLK_BYPASS is not set
+CPU_HAS_PIO3=y
+CPU_HAS_L2CC=y
+CPU_HAS_PMECC=y
+CONFIG_HAS_HW_INFO=y
+CONFIG_TWI=y
+CONFIG_TWI0=y
+CONFIG_TWI1=y
+CONFIG_TWI2=y
+CONFIG_TWI3=y
+# CONFIG_MACB is not set
+# CONFIG_AES is not set
+# CONFIG_LOAD_HW_INFO is not set
+CPU_HAS_TWI0=y
+CPU_HAS_TWI1=y
+CPU_HAS_TWI2=y
+CPU_HAS_TWI3=y
+CPU_HAS_AES=y
+# CPU_HAS_PIO4 is not set
+# CONFIG_FLEXCOM is not set
+# CPU_HAS_FLEXCOM is not set
+
+#
+# Memory selection
+#
+# CONFIG_SDRAM is not set
+# CONFIG_SDDRC is not set
+CONFIG_DDRC=y
+ALLOW_DATAFLASH=y
+# ALLOW_FLASH is not set
+ALLOW_NANDFLASH=y
+ALLOW_SDCARD=y
+# ALLOW_PSRAM is not set
+# ALLOW_SDRAM_16BIT is not set
+
+#
+# RAM Configuration
+#
+# CONFIG_RAM_32MB is not set
+# CONFIG_RAM_64MB is not set
+# CONFIG_RAM_128MB is not set
+# CONFIG_RAM_256MB is not set
+CONFIG_RAM_512MB=y
+# CONFIG_LPDDR1 is not set
+# CONFIG_LPDDR2 is not set
+# CONFIG_LPDDR3 is not set
+CONFIG_DDR2=y
+# CONFIG_DDR3 is not set
+# CONFIG_SAMA5D2_LPDDR2 is not set
+# CONFIG_DATAFLASH is not set
+# CONFIG_FLASH is not set
+CONFIG_NANDFLASH=y
+# CONFIG_SDCARD is not set
+CONFIG_MEMORY="nandflash"
+ALLOW_BOOT_FROM_DATAFLASH_CS0=y
+
+#
+# NAND flash configuration
+#
+# CONFIG_ENABLE_SW_ECC is not set
+CONFIG_USE_PMECC=y
+# CONFIG_ON_DIE_ECC is not set
+
+#
+# PMECC Configuration
+#
+CONFIG_PMECC_AUTO_DETECT=y
+# CONFIG_NANDFLASH_SMALL_BLOCKS is not set
+CONFIG_ONFI_DETECT_SUPPORT=y
+CONFIG_USE_ON_DIE_ECC_SUPPORT=y
+# ALLOW_NANDFLASH_RECOVERY is not set
+CONFIG_BOOTSTRAP_MAXSIZE="65536"
+CONFIG_PROJECT="nandflash"
+CONFIG_LOAD_UBOOT=y
+# CONFIG_LOAD_LINUX is not set
+# CONFIG_LOAD_NONE is not set
+# CONFIG_LOAD_ANDROID is not set
+# CONFIG_LOAD_1MB is not set
+# CONFIG_LOAD_4MB is not set
+# CONFIG_LOAD_64KB is not set
+# CONFIG_SKIP_COPY_IMAGE is not set
+CONFIG_IMG_ADDRESS="0x00040000"
+CONFIG_JUMP_ADDR="0x26F00000"
+
+#
+# U-Boot Image Storage Setup
+#
+CONFIG_IMG_SIZE="0x000a0000"
+CONFIG_DEBUG=y
+CONFIG_DEBUG_INFO=y
+# CONFIG_DEBUG_LOUD is not set
+# CONFIG_DEBUG_VERY_LOUD is not set
+# CONFIG_SECURE is not set
+CONFIG_DISABLE_WATCHDOG=y
+
+#
+# Hardware Initialization Options
+#
+CONFIG_HW_DISPLAY_BANNER=y
+CONFIG_HW_BANNER="\"\\n\\nAT91Bootstrap \" AT91BOOTSTRAP_VERSION \" (\" COMPILE_TIME \")\\n\\n\""
+CONFIG_HW_INIT=y
+# CONFIG_USER_HW_INIT is not set
+
+#
+# Slow Clock Configuration Options
+#
+CONFIG_SCLK=y
+
+#
+# ARM TrustZone Options
+#
+CONFIG_MATRIX=y
+# CONFIG_ENTER_NWD is not set
+CONFIG_REDIRECT_ALL_INTS_AIC=y
+CONFIG_PM=y
+
+#
+# Select the Devices to the Low-power mode
+#
+# CONFIG_MAC0_PHY is not set
+# CONFIG_HDMI is not set
+CONFIG_PM_PMIC=y
+# CONFIG_BACKUP_MODE is not set
+
+#
+# Board's Workaround Options
+#
+CONFIG_ACT8865_SET_VOLTAGE=y
+CONFIG_DISABLE_ACT8865_I2C=y
+# CONFIG_SUSPEND_ACT8945A_CHARGER is not set
+CONFIG_ACT8865=y
+
+#
+# Board Hardware Information Options
+#
+# CONFIG_LOAD_EEPROM is not set
+CONFIG_AUTOCONFIG_TWI_BUS=y
+
+#
+# Basic Drivers support
+#
+CONFIG_PIT=y
+CONFIG_WDT=y
+CONFIG_RSTC=y
+CONFIG_USART=y
+CONFIG_PIO=y
+CONFIG_PMC=y
diff -Nuar at91bootstrap/Makefile at91bootstrap-sama5d4/Makefile
--- at91bootstrap/Makefile	2019-08-02 17:30:35.000000000 +0800
+++ at91bootstrap-sama5d4/Makefile	2019-08-22 11:46:05.882742473 +0800
@@ -119,6 +119,7 @@
 
 HOSTARCH := $(shell uname -m | sed -e s/arm.*/arm/)
 
+CROSS_COMPILE=/opt/crosstool/cortex-a7/bin/arm-linux-gnueabi-
 AS=$(CROSS_COMPILE)gcc
 CC=$(CROSS_COMPILE)gcc
 LD=$(CROSS_COMPILE)ld