{ lib, pkgs, config, modulesPath, ... }: let inherit (lib.modules) mkForce mkDefault; inherit (builtins) toFile; in { imports = [ (modulesPath + "/installer/sd-card/sd-image.nix") ]; boot = { supportedFilesystems = mkForce ["vfat"]; consoleLogLevel = mkDefault 7; kernelParams = ["console=tty0"]; loader = { grub.enable = false; generic-extlinux-compatible.enable = true; }; }; sdImage = { compressImage = mkForce false; populateFirmwareCommands = let configTxt = toFile "config.txt" '' [pi3] kernel=u-boot-rpi3.bin [pi4] kernel=u-boot-rpi4.bin enable_gic=1 armstub=armstub8-gic.bin # Otherwise the resolution will be weird in most cases, compared to # what the pi3 firmware does by default. disable_overscan=1 [all] # Boot in 64-bit mode. arm_64bit=1 # U-Boot needs this to work, regardless of whether UART is actually used or not. # Look in arch/arm/mach-bcm283x/Kconfig in the U-Boot tree to see if this is still # a requirement in the future. enable_uart=1 # Prevent the firmware from smashing the framebuffer setup done by the mainline kernel # when attempting to show low-voltage or overtemperature warnings. avoid_warnings=1 ''; in '' (cd ${pkgs.raspberrypifw}/share/raspberrypi/boot && cp bootcode.bin fixup*.dat start*.elf $NIX_BUILD_TOP/firmware/) # Add the config cp ${configTxt} firmware/config.txt # Add pi3 specific files cp ${pkgs.ubootRaspberryPi3_64bit}/u-boot.bin firmware/u-boot-rpi3.bin # Add pi4 specific files cp ${pkgs.ubootRaspberryPi4_64bit}/u-boot.bin firmware/u-boot-rpi4.bin cp ${pkgs.raspberrypi-armstubs}/armstub8-gic.bin firmware/armstub8-gic.bin cp ${pkgs.raspberrypifw}/share/raspberrypi/boot/bcm2711-rpi-4-b.dtb firmware/ ''; populateRootCommands = '' mkdir -p ./files/boot ${config.boot.loader.generic-extlinux-compatible.populateCmd} -c ${config.system.build.toplevel} -d ./files/boot ''; }; }