WIP2
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README.md
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README.md
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# VisionFive-Nix
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# NixOS on RISC-V
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This repository contains primarily instructions for the VisionFive 1 board.
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For now let's try to boot it in qemu.
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For experimental support for VisionFive 2, see [visionfive2/README.md](visionfive2/README.md).
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$ nix build .#nixosConfigurations.visionfive-cross.config.system.build.vm
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# Flashing the Bootloader (VisionFive 1)
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That would cross-build a bootable RISC-V qemu VM from x86.
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1. Do not apply power to the board
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2. Attach the board via serial to your system, ensuring power is still not applied
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3. Ensure the serial shows up in `/dev/ttyUSB*`, you can see this by running `dmesg` after plugging in the device
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```
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❯ dmesg
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[200199.253566] usb 1-2: new full-speed USB device number 79 using xhci_hcd
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[200199.386983] usb 1-2: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
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[200199.386988] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
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[200199.386990] usb 1-2: Product: FT232R USB UART
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[200199.386991] usb 1-2: Manufacturer: FTDI
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[200199.386992] usb 1-2: SerialNumber: A50285BI
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[200199.390344] ftdi_sio 1-2:1.0: FTDI USB Serial Device converter detected
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[200199.390363] usb 1-2: Detected FT232RL
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[200199.391207] usb 1-2: FTDI USB Serial Device converter now attached to ttyUSB0
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^^^^^^^
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^ This becomes /dev/ttyUSB0
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```
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4. `nix run github:matthewcroughan/visionfive-nix#flashBootloader /dev/ttyUSB0`
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5. Wait to be told to apply power to the board this may take a while as U-Boot and OpenSBI are being cross-compiled.
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```
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Terminal ready
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### Apply power to the VisionFive Board ###
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```
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Once power is applied, picocom will send the OpenSBI/U-Boot payload via XMODEM. You can then flash NixOS or any other distribution that follows the Distro Boot specification[^1] to an SD card and boot it.
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###### Why do I need to flash the bootloader?
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https://github.com/starfive-tech/u-boot/issues/30
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The VisionFive ships with a version of OpenSBI/U-Boot that does not follow the distro-boot specification. NixOS and other distros would like to remain generic, without vendor specific details entering their system. This means booting NixOS requires flashing the bootloader as described above.
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[^1]: https://source.denx.de/u-boot/u-boot/-/blob/v2022.04/doc/develop/distro.rst
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90
flake.nix
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flake.nix
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{
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{
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inherit (pkgs.pkgsCross.riscv64.linux) linuxPackages_visionfive;
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inherit (pkgs.pkgsCross.riscv64.linux) linuxPackages_visionfive;
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};
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};
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apps.${system} = {
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flashBootloader =
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let
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expectScript = pkgs.writeScript "expect-visionfive.sh" ''
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#!${pkgs.expect}/bin/expect -f
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set timeout -1
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spawn ${pkgs.picocom}/bin/picocom [lindex $argv 0] -b 115200 -s "${pkgs.lrzsz}/bin/sz -X"
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expect "Terminal ready"
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send_user "\n### Apply power to the VisionFive Board ###\n"
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expect "bootloader"
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expect "DDR"
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send "\r"
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expect "0:update uboot"
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expect "select the function:"
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send "0\r"
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expect "send file by xmodem"
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expect "CC"
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send "\x01\x13"
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expect "*** file:"
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send "${pkgs.pkgsCross.riscv64.firmware-visionfive}/opensbi_u-boot_visionfive.bin"
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send "\r"
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expect "Transfer complete"
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'';
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program = pkgs.writeShellScript "flash-visionfive.sh" ''
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if $(groups | grep --quiet --word-regexp "dialout"); then
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echo "User is in dialout group, flashing to board without sudo"
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${expectScript} $1
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else
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echo "User is not in dialout group, flashing to board with sudo"
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sudo ${expectScript} $1
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fi
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'';
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in
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{
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type = "app";
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program = "${program}";
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};
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flashOriginal =
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let
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flashScript = pkgs.writeScript "jh7100-recover-visionfive.sh" ''
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set -x
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${pkgs.lib.getExe self.packages.${system}.jh7100-recover} \
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-D $1 \
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-r ${jh7100_recovery_binary} \
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-b ${jh7100_secondBoot} \
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-d ${jh7100_ddrinit}
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'';
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program = pkgs.writeShellScript "flash-visionfive.sh" ''
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if $(groups | grep --quiet --word-regexp "dialout"); then
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echo "User is in dialout group, flashing to board without sudo"
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${flashScript} $1
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else
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echo "User is not in dialout group, flashing to board with sudo"
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sudo ${flashScript} $1
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fi
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'';
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in
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{
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type = "app";
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program = "${program}";
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};
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} // import ./visionfive2/commands.nix { inherit inputs pkgs; };
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packages.${system} = {
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jh7100-recover = pkgs.writeCBin "jh7100-recover" (builtins.readFile "${jh71xx-tools}/jh7100-recover.c");
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};
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images = {
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images = {
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visionfive-cross = self.nixosConfigurations.visionfive-cross.config.system.build.sdImage;
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visionfive-cross = self.nixosConfigurations.visionfive-cross.config.system.build.sdImage;
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visionfive-native = self.nixosConfigurations.visionfive-native.config.system.build.sdImage;
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visionfive-native = self.nixosConfigurations.visionfive-native.config.system.build.sdImage;
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visionfive2-sd-image = importApply ./visionfive2/sd-image.nix { inherit inputs importApply; };
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visionfive2-sd-image = importApply ./visionfive2/sd-image.nix { inherit inputs importApply; };
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visionfive2-kernel = importApply ./visionfive2/kernel/nixos-module.nix { inherit inputs importApply; };
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visionfive2-kernel = importApply ./visionfive2/kernel/nixos-module.nix { inherit inputs importApply; };
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};
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};
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nixosConfigurations =
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let
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visionfive2-example-modules = [
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./base.nix
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./configuration.nix
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self.nixosModules.visionfive2-sd-image
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];
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in
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{
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visionfive-cross = nixpkgs.lib.nixosSystem {
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visionfive-cross = nixpkgs.lib.nixosSystem {
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system = "${system}";
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system = "${system}";
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modules = modules ++ [
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modules = modules ++ [
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system = "riscv64-linux";
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system = "riscv64-linux";
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modules = modules;
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modules = modules;
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};
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};
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visionfive2-cross = nixpkgs.lib.nixosSystem {
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system = "${system}";
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modules = visionfive2-example-modules ++ [
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{
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nixpkgs.crossSystem = {
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system = "riscv64-linux";
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};
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}
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];
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};
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visionfive2-native = nixpkgs.lib.nixosSystem {
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system = "riscv64-linux";
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modules = visionfive2-example-modules;
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};
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};
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};
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};
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};
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}
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}
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