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StarFiveTech VisionFive2 SDK

This builds a complete RISC-V cross-compile toolchain for the StarFiveTech JH7110 SoC. It also builds U-boot SPL, U-boot and a flattened image tree (FIT) image with a Opensbi binary, linux kernel, device tree, ramdisk image and rootfs image for the JH7110 VisionFive2 board. Note this SDK is built with the linux kernel version 5.15.


Recommend OS: Ubuntu 16.04/18.04/20.04/22.04 x86_64

Install required additional packages:

$ sudo apt update
$ sudo apt-get install build-essential automake libtool texinfo bison flex gawk
g++ git xxd curl wget gdisk gperf cpio bc screen texinfo unzip libgmp-dev
libmpfr-dev libmpc-dev libssl-dev libncurses-dev libglib2.0-dev libpixman-1-dev
libyaml-dev patchutils python3-pip zlib1g-dev device-tree-compiler dosfstools
mtools kpartx rsync

Additional packages for Git LFS support:

$ curl -s | sudo bash
$ sudo apt-get install git-lfs

Fetch Code Instructions

Checkout this repository (e.g.: branch JH7110_VisionFive2_devel). Then checkout all of the linked submodules using:

$ git clone
$ cd VisionFive2
$ git checkout JH7110_VisionFive2_devel
$ git submodule update --init --recursive

This will take some time and require around 9GB of disk space. Some modules may fail because certain dependencies don’t have the best git hosting. The only solution is to wait and try again later (or ask someone for a copy of that source repository).

For user who build the release tag version, the above command is enough. For developer, need to switch the 5 submodules buildroot, u-boot, linux, opensbi, soft_3rdpart to correct branch manually, also could refer to .gitmodule

$ cd buildroot && git checkout --track origin/JH7110_VisionFive2_devel && cd ..
$ cd u-boot && git checkout --track origin/JH7110_VisionFive2_devel && cd ..
$ cd linux && git checkout --track origin/JH7110_VisionFive2_devel && cd ..
$ cd opensbi && git checkout master && cd ..
$ cd soft_3rdpart && git checkout JH7110_VisionFive2_devel && cd ..

Quick Build Instructions

Below are the quick building for the initramfs image which could be translated to board through tftp and run on board. The completed toolchain, u-boot-spl.bin.normal.out, visionfive2_fw_payload.img, will be generated under work/ directory. The completed build tree will consume about 18G of disk space.

$ make -j$(nproc)

Then the below target files will be generated, copy files to tftp server workspace path:

├── visionfive2_fw_payload.img
├── initramfs.cpio.gz
├── u-boot-spl.bin.normal.out
├── linux/arch/riscv/boot
    ├── dts
    │   └── starfive
    │       ├── jh7110-visionfive-v2-ac108.dtb
    │       ├── jh7110-visionfive-v2.dtb
    │       ├── jh7110-visionfive-v2-wm8960.dtb
    │       ├── vf2-overlay
    │       │   └── vf2-overlay-uart3-i2c.dtbo
    └── Image.gz

Additional command to config buildroot, uboot, linux, busybox:

$ make buildroot_initramfs-menuconfig   # buildroot initramfs menuconfig
$ make buildroot_rootfs-menuconfig      # buildroot rootfs menuconfig
$ make uboot-menuconfig                 # uboot menuconfig
$ make linux-menuconfig                 # Kernel menuconfig
$ make -C ./work/buildroot_initramfs/ O=./work/buildroot_initramfs busybox-menuconfig  # for initramfs busybox menuconfig
$ make -C ./work/buildroot_rootfs/ O=./work/buildroot_rootfs busybox-menuconfig        # for rootfs busybox menuconfig

Additional command to build single package or module:

$ make vmlinux   # build linux kernel
$ make uboot     # build u-boot
$ make -C ./work/buildroot_rootfs/ O=./work/buildroot_rootfs busybox-rebuild   # build busybox package
$ make -C ./work/buildroot_rootfs/ O=./work/buildroot_rootfs ffmpeg-rebuild    # build ffmpeg package

Running on JH7110 VisionFive2 Board via Network

After the JH7110 VisionFive2 Board is properly connected to the serial port cable, network cable and power cord, turn on the power from the wall power socket to power and you will see the startup information as follows:

U-Boot SPL 2021.10 (Oct 31 2022 - 12:11:37 +0800)
DDR version: dc2e84f0.
Trying to boot from SPI

OpenSBI v1.0
   ____                    _____ ____ _____
  / __ \                  / ____|  _ \_   _|
 | |  | |_ __   ___ _ __ | (___ | |_) || |
 | |  | | '_ \ / _ \ '_ \ \___ \|  _ < | |
 | |__| | |_) |  __/ | | |____) | |_) || |_
  \____/| .__/ \___|_| |_|_____/|____/_____|
        | |

Platform Name             : StarFive VisionFive V2
Platform Features         : medeleg
Platform HART Count       : 5
Platform IPI Device       : aclint-mswi
Platform Timer Device     : aclint-mtimer @ 4000000Hz
Platform Console Device   : uart8250
Platform HSM Device       : ---
Platform Reboot Device    : ---
Platform Shutdown Device  : ---
Firmware Base             : 0x40000000
Firmware Size             : 360 KB
Runtime SBI Version       : 0.3

Domain0 Name              : root
Domain0 Boot HART         : 3
Domain0 HARTs             : 0*,1*,2*,3*,4*
Domain0 Region00          : 0x0000000002000000-0x000000000200ffff (I)
Domain0 Region01          : 0x0000000040000000-0x000000004007ffff ()
Domain0 Region02          : 0x0000000000000000-0xffffffffffffffff (R,W,X)
Domain0 Next Address      : 0x0000000040200000
Domain0 Next Arg1         : 0x0000000042200000
Domain0 Next Mode         : S-mode
Domain0 SysReset          : yes

Boot HART ID              : 3
Boot HART Domain          : root
Boot HART Priv Version    : v1.11
Boot HART Base ISA        : rv64imafdcbx
Boot HART ISA Extensions  : none
Boot HART PMP Count       : 8
Boot HART PMP Granularity : 4096
Boot HART PMP Address Bits: 34
Boot HART MHPM Count      : 2
Boot HART MIDELEG         : 0x0000000000000222
Boot HART MEDELEG         : 0x000000000000b109

U-Boot 2021.10 (Oct 31 2022 - 12:11:37 +0800), Build: jenkins-VF2_515_Branch_SDK_Release-10

CPU:   rv64imacu
Model: StarFive VisionFive V2
DRAM:  8 GiB
MMC:   sdio0@16010000: 0, sdio1@16020000: 1
Loading Environment from SPIFlash... SF: Detected gd25lq128 with page size 256 Bytes, erase size 4 KiB, total 16 MiB
*** Warning - bad CRC, using default environment

StarFive EEPROM format v2

--------EEPROM INFO--------
Vendor : StarFive Technology Co., Ltd.
Product full SN: VF7110A1-2243-D008E000-00000001
data version: 0x2
PCB revision: 0xa1
BOM revision: A
Ethernet MAC0 address: 6c:cf:39:00:14:5b
Ethernet MAC1 address: 6c:cf:39:00:14:5c
--------EEPROM INFO--------

In:    serial@10000000
Out:   serial@10000000
Err:   serial@10000000
Model: StarFive VisionFive V2
Net:   eth0: ethernet@16030000, eth1: ethernet@16040000
switch to partitions #0, OK
mmc1 is current device
found device 1
bootmode flash device 1
Failed to load 'uEnv.txt'
Can't set block device
Hit any key to stop autoboot:  0 
StarFive # 

Then press any key to stop and enter uboot terminal, there are two way to boot the board

1. Running with the default dtb jh7110-visionfive-v2.dtb

transfer through TFTP:

Step1: set environment parameters:

setenv ipaddr; setenv serverip;

Step2: upload image file to ddr:

tftpboot ${loadaddr};

Step3: load and execute:

bootm start ${loadaddr};bootm loados ${loadaddr};run chipa_set_linux;run cpu_vol_set; booti ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdt_addr_r};

When you see the buildroot login: message, then congratulations, the launch was successful

buildroot login:root
Password: starfive

2. Running the other dtb with the Image.gz and initramfs.cpio.gz

If we want to load the other dtb, e.g. jh7110-visionfive-v2-wm8960.dtb, follow the below

Step1: set environment parameters:

setenv ipaddr; setenv serverip;

Step2: upload files to ddr:

tftpboot ${fdt_addr_r} jh7110-visionfive-v2-wm8960.dtb;
tftpboot ${kernel_addr_r} Image.gz;
tftpboot ${ramdisk_addr_r} initramfs.cpio.gz;
run chipa_set_linux;run cpu_vol_set;

Step3: load and execute:

booti ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdt_addr_r}

When you see the buildroot login: message, then congratulations, the launch was successful

buildroot login:root
Password: starfive

APPENDIX I: Generate Booting SD Card

If you don’t already use a local tftp server, then you probably want to make the TF card target; the default size is 16 GBs. NOTE THIS WILL DESTROY ALL EXISTING DATA on the target TF card; The GPT Partition Table for the TF card is recommended.

Generate SD Card Image File

We could generate a sdcard image file by the below command. The sdcard image file could be copied to sd card or tf card through dd command, or rpi-imager or balenaEtcher tool

$ make -j$(nproc)
$ make buildroot_rootfs -j$(nproc)
$ make img

The output file work/sdcard.img will be generated.

Copy Image File to SD Card

The sdcard.img can be copied to a tf card. e.g. through dd command as below

$ sudo dd if=work/sdcard.img of=/dev/sdX bs=4096
$ sync

Then extend the tf card rootfs partition if needed. There are two ways to implement it.

The first way could be done on Ubuntu host, need to install the below package:

$ sudo apt install cloud-guest-utils e2fsprogs

Then insert the tf card to Ubuntu host, run the below, note /dev/sdX is the tf card device.

$ sudo growpart /dev/sdX 4  # extend partition 4
$ sudo e2fsck -f /dev/sdX4
$ sudo resize2fs /dev/sdX4  # extend filesystem
$ sudo fsck.ext4 /dev/sdX4

The second way could be done on VisionFive2 board, use fdisk and resize2fs command:

# fdisk /dev/mmcblk1
Welcome to fdisk (util-linux 2.37.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
This disk is currently in use - repartitioning is probably a bad idea.
It's recommended to umount all file systems, and swapoff all swap
partitions on this disk.
Command (m for help): d
Partition number (1-4, default 4): 4
Partition 4 has been deleted.
Command (m for help): n
Partition number (4-128, default 4): 4
First sector (614400-62333918, default 614400):
): t sector, +/-sectors or +/-size{K,M,G,T,P} (614400-62333918, default 62333918)
Created a new partition 4 of type 'Linux filesystem' and of size 29.4 GiB.
Partition #4 contains a ext4 signature.
Do you want to remove the signature? [Y]es/[N]o: N
Command (m for help): w
The partition table has been altered.
Syncing disks.

# resize2fs /dev/mmcblk1p4
resize2fs 1.46.4 (18-Aug-2021)
Filesystem at /d[
111.756178] EXT4-fs (mmcblk1p4): resizing filesystem from 512000
to 30859756 blocks
ev/mmcblk1p4 is [
111.765203] EXT4-fs (mmcblk1p4): resizing filesystem from 512000
to 30859265 blocks
mounted on /; on-line resizing required
old_desc_blocks = 2, new_desc_blocks = 118
[ 112.141953] random: crng init done
[ 112.145369] random: 7 urandom warning(s) missed due to ratelimiting
[ 115.474184] EXT4-fs (mmcblk1p4): resized filesystem to 30859265
The filesystem on /dev/mmcblk1p4 is now 30859756 (1k) blocks long.

If you need to add a new partition, such as a swap partition (here we do set the rest of disk space to swap partition, but normally swap partition size should be the same as DDR size or double of DDR size), you can use the following shell script afer the image running on board:

sgdisk -e /dev/mmcblk0
gdisk $disk << EOF


mkswap /dev/mmcblk0p5
swapoff -a
swapon /dev/mmcblk0p5

APPENDIX II: Using DTB Overlay Dynamically

The system support loading dtb overlay dynamically when the board is running. Run below on board:

# mount -t configfs none /sys/kernel/config
# mkdir -p /sys/kernel/config/device-tree/overlays/dtoverlay
# cd <the dtoverlay.dtbo path>
# cat vf2-overlay-uart3-i2c.dtbo > /sys/kernel/config/device-tree/overlays/dtoverlay/dtbo

Additional, you could remove the dtbo feature:

# rmdir /sys/kernel/config/device-tree/overlays/dtoverlay

APPENDIX III: Updating SPL and U-Boot binaries Under U-boot

Prepare the tftp sever. e.g. sudo apt install tftpd-hpa for Ubuntu host.

  1. Power on the VisionFive2 board and wait until enters the u-boot command line

  2. Configure the environment variables by executing:

    StarFive # setenv ipaddr;setenv serverip
  3. Check the connectivity by pinging the host PC from evaluation board;

  4. Initialize SPI flash:

    StarFive # sf probe
  5. Update SPL binary

    StarFive # tftpboot ${loadaddr}  u-boot-spl.bin.normal.out
    StarFive # sf update ${loadaddr} 0x0 $filesize
  6. Update U-Boot binary

    StarFive # tftpboot ${loadaddr}  visionfive2_fw_payload.img
    StarFive # sf update ${loadaddr} 0x100000 $filesize

APPENDIX IV: Recovering Bootloader

The SPL and U-Boot are stored inside the SPI flash on board. There may be situations where you accidentally emptied the flash or if the flash is damaged on your board. In these situations, it’s better to recover the bootloader.

Please jump to for more details