chaoyangnz / rvz

xv6 port on RISC-V VisionFive2 / Nezha in Zig

RVZ

A xv6 port on JH7110 / D1-H using Zig.

Currently I run on VisionFive2. In rvx, I managed to port on Nezha D1 in C.

Development (Ubuntu)

Prerequisite

• VisionFive2
• Nezha

Unbuntu:

• USB-UART driver: sudo apt install libusb-1.0-0-dev
• packages:
  • Zig: snap install zig --classic --edge
  • toolchain: npm i xpm & xpm i
  • (optional): sudo apt-get install -y gcc-riscv64-linux-gnu

Validation

• lsusb

Bus 001 Device 004: ID 0403:6001 Future Technology Devices International, Ltd FT232 Serial (UART) IC

sudo adduser <user> dialout

Tools

These tools may be needed during build, so better to put them in $PATH.

• vf2flash

A utility to help load your kernel into DRAM and run and also flash your kernel into SPI Flash sector. It also can act as a Serial terminal.

• vf2-uboot-fit-imager

• xfel

A CLI tool to build U-boot FIT image with visionfive ITS.

Build (test bare metal)

./dev

The above will load the binary to DRAM 0x40000000 and run.

You should be able to see UART output at the end.