phytium-linux-buildroot/configs/phytium_initrd_defconfig

# Architecture
BR2_aarch64=y
BR2_cortex_a53=y

# Filesystem
BR2_TARGET_ROOTFS_EXT2=y
BR2_TARGET_ROOTFS_EXT2_4=y
BR2_TARGET_ROOTFS_EXT2_SIZE="80M"
BR2_TARGET_ROOTFS_INITRAMFS=y
BR2_ROOTFS_RESIZE=y
#BR2_ROOTFS_POST_IMAGE_SCRIPT="board/phytium/post-image.sh support/scripts/genimage.sh"
#BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/phytium/genimage-efi.cfg"
BR2_TARGET_ROOTFS_CPIO=y
BR2_TARGET_ROOTFS_CPIO_GZIP=y

# Hostname and issue
BR2_TARGET_GENERIC_HOSTNAME="D2000"
BR2_TARGET_GENERIC_ISSUE="Welcome to Phytium Buildroot initrd"

# toolchain
BR2_TOOLCHAIN_EXTERNAL=y
BR2_TOOLCHAIN_EXTERNAL_ARM_AARCH64=y
BR2_TOOLCHAIN_USES_GLIBC=y
BR2_TOOLCHAIN_EXTERNAL_GLIBC=y

# Linux headers same as kernel
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_19=y

# Kernel
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="file://$(TOPDIR)/files/linux-4.19.tar.gz"
BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="$(LINUX_DIR)/arch/arm64/configs/sdk.config"
#BR2_LINUX_KERNEL_DTS_SUPPORT=y
#BR2_LINUX_KERNEL_INTREE_DTS_NAME="phytium/d2000-devboard-dsk"
BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM=y
BR2_LINUX_KERNEL_IMAGE_TARGET_NAME="Image"
BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y

# Bootloader
#BR2_TARGET_GRUB2=y
#BR2_TARGET_GRUB2_ARM64_EFI=y


# Serial port config
BR2_TARGET_GENERIC_GETTY=y
BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"

# required tools to create the microSD image
#BR2_PACKAGE_HOST_DOSFSTOOLS=y
#BR2_PACKAGE_HOST_GENIMAGE=y
#BR2_PACKAGE_HOST_MTOOLS=y

# busybox setting
#BR2_INIT_BUSYBOX=y

#eudev support
BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y
BR2_ROOTFS_OVERLAY="board/phytium/common/busybox_initrd_overlay"

# basic packages and tools
#BR2_PACKAGE_MTD=y
#BR2_PACKAGE_MTD_MTD_DEBUG=y
#BR2_PACKAGE_SYSSTAT=y
#BR2_PACKAGE_E2FSPROGS=y
#BR2_PACKAGE_RT_TESTS=y
#BR2_PACKAGE_OPENSSH=y
#BR2_PACKAGE_OPENSSL=y
#BR2_PACKAGE_WGET=y

# ca-certs packages
#BR2_PACKAGE_CA_CERTIFICATES=y

# dhcpd package
#BR2_PACKAGE_DHCPCD=y

# resize2fs package
#BR2_PACKAGE_E2FSPROGS_RESIZE2FS=y

# Text editors
#BR2_PACKAGE_NANO=y

# IGH ETHERCAT
#BR2_PACKAGE_IGH_ETHERCAT=y

#iproute2
#BR2_PACKAGE_IPROUTE2=y

#netperf
#BR2_PACKAGE_NETPERF=y

#BR2_PACKAGE_ETHTOOL=y
#BR2_PACKAGE_COLLECTD_CURL=y
#BR2_PACKAGE_COLLECTD_CURL_JSON=y
#BR2_PACKAGE_COLLECTD_CURL_XML=y
#BR2_PACKAGE_LIBCURL=y
#BR2_PACKAGE_LIBCURL_CURL=y
#BR2_PACKAGE_LIBCURL_VERBOSE=y
#BR2_PACKAGE_FLICKCURL=y
#BR2_PACKAGE_FLICKCURL_UTILS=y
BR2_PACKAGE_BASH=y
BR2_SYSTEM_BIN_SH_BASH=y
BR2_SYSTEM_BIN_SH="bash"

# haveged
#BR2_PACKAGE_HAVEGED=y

#avahi
#BR2_PACKAGE_AVAHI=y
#BR2_PACKAGE_AVAHI_AUTOIPD=y
#BR2_PACKAGE_AVAHI_DAEMON=y
#BR2_PACKAGE_AVAHI_LIBDNSSD_COMPATIBILITY=y
#BR2_PACKAGE_NSS_MDNS=y

# i2c-tools
#BR2_PACKAGE_I2C_TOOLS=y

BR2_USE_MMU=y
BR2_USE_WCHAR=y
#BR2_PACKAGE_VIM=y

#BR2_INSTALL_LIBSTDCPP=y
#BR2_PACKAGE_IPERF=y

BR2_TOOLCHAIN_HAS_THREADS=y
#BR2_PACKAGE_IPERF3=y
#BR2_PACKAGE_TCPDUMP=y

# OPC UA tools
#BR2_PACKAGE_LIBOPEN62541=y
#BR2_PACKAGE_LIBOPEN62541_BUILD_EXAMPLES=y

BR2_PACKAGE_XORG_ROGUE_UMLIBS=y