# To build, use: # nix-build nixos -I nixos-config=nixos/modules/installer/sd-card/sd-image-aarch64.nix -A config.system.build.sdImage { config, lib, pkgs, ... }: { imports = [ ../../profiles/base.nix ./sd-image.nix ]; boot.loader.grub.enable = false; boot.loader.generic-extlinux-compatible.enable = true; boot.consoleLogLevel = lib.mkDefault 7; # The serial ports listed here are: # - ttyS0: for Tegra (Jetson TX1) # - ttyAMA0: for QEMU's -machine virt boot.kernelParams = ["console=ttyS0,115200n8" "console=ttyAMA0,115200n8" "console=tty0"]; boot.initrd.availableKernelModules = [ # Allows early (earlier) modesetting for the Raspberry Pi "vc4" "bcm2835_dma" "i2c_bcm2835" # Allows early (earlier) modesetting for Allwinner SoCs "sun4i_drm" "sun8i_drm_hdmi" "sun8i_mixer" ]; sdImage = { populateFirmwareCommands = let configTxt = pkgs.writeText "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 ''; }; }