50 lines
1.4 KiB
Nix
50 lines
1.4 KiB
Nix
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# Base image for building SD images for my Pi 3's
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#
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# To build, use:
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# imports = [ ./sd-image_paidh-base ]
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{ config, lib, pkgs, ... }:
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let
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extlinux-conf-builder =
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import <nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.nix> {
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pkgs = pkgs.buildPackages;
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};
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in
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{
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imports = [
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<nixpkgs/nixos/modules/profiles/base.nix>
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<nixpkgs/nixos/modules/installer/cd-dvd/sd-image.nix>
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];
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boot.consoleLogLevel = lib.mkDefault 7;
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sdImage = {
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populateFirmwareCommands = let
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configTxt = pkgs.writeText "config.txt" ''
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kernel=u-boot-rpi3.bin
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# Boot in 64-bit mode.
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arm_control=0x200
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# U-Boot used to need this to work, regardless of whether UART is actually used or not.
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# TODO: check when/if this can be removed.
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enable_uart=1
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# Prevent the firmware from smashing the framebuffer setup done by the mainline kernel
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# when attempting to show low-voltage or overtemperature warnings.
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avoid_warnings=1
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'';
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in ''
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(cd ${pkgs.raspberrypifw}/share/raspberrypi/boot && cp bootcode.bin fixup*.dat start*.elf $NIX_BUILD_TOP/firmware/)
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cp ${pkgs.ubootRaspberryPi3_64bit}/u-boot.bin firmware/u-boot-rpi3.bin
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cp ${configTxt} firmware/config.txt
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'';
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populateRootCommands = ''
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mkdir -p ./files/boot
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${extlinux-conf-builder} -t 3 -c ${config.system.build.toplevel} -d ./files/boot
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'';
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};
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}
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