68 lines
2.0 KiB
Markdown
68 lines
2.0 KiB
Markdown
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# Personal NixOS RISC-V 64 flake
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Goals:
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* I want to flash NixOS on to the M.2 NVMe SSD of a VisionFive2
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* I want a flake with a neat cross story / UX
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# Nix?
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* https://nixos.org/
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* https://determinate.systems/posts/determinate-nix-installer
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# How?
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The VisionFive2 shipped with a stinky firmware, which does not support booting from the SSD.
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This capability was later added in [starfive uboot v3.0.4](https://github.com/starfive-tech/u-boot/commit/2139bf20ea67250c9dc426735fb9daf14e21bb9f).
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As such we have to flash an SD card, use it to flash new firmware to the VisionFive2 SPI flash, then finally boot from the NVMe, all the while [fiddling with DIP switches](dip-pics.md).
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## Building an image
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Pick a host, then pick your poison:
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| Hostname | Description |
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| -------------- | ------------------- |
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| `demo-r12a` | Board rev 1.2A |
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| `demo-r12a-8g` | Board rev 1.2A, 8GB |
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| `demo-r13b` | Board rev 1.3B |
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| `demo-r13b-8g` | Board rev 1.3B, 8GB |
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| `asgaut` | Asgaut |
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| `gunder` | Gunder |
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```shell
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nix build .#asgaut-qemu # emulation go brr
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nix build .#asgaut-nvme-image
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nix build .#asgaut-sd-image
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nix build .#asgaut-sd-installer
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```
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## Building without cross compilation
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Either use a `riscv64-linux` host, or run the following command with `riscv64-linux` [binfmt emulation](https://search.nixos.org/options?query=boot.binfmt.emulatedSystems) configured:
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```shell
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nix build .#packages.riscv64-linux.demo-nvme-image
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```
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## Flashing an image
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```shell
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nix build .#something
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lsblk # locate your SD card
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umount /run/media/pbsds/9C33-6BBD # example mounts
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sudo dd if=result/sd-image/*.img of=/dev/sdX bs=4M conf=fsync status=progress
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sync
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```
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## Booting
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Here are some sweet [dip pics](https://doc-en.rvspace.org/VisionFive2/Boot_UG/VisionFive2_SDK_QSG/boot_mode_settings.html).
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After flashing the firmware you can boot using quad SPI. Use SDIO3.0 to boot using the u-boot SPL and FIT firmware on the sd card.
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## Updating SPI firmware
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```shell
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sudo update-firmware
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```
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