2020-04-24 23:36:52 +00:00
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# To build, use:
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# nix-build nixos -I nixos-config=nixos/modules/installer/cd-dvd/sd-image-aarch64.nix -A config.system.build.sdImage
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{ config, lib, pkgs, ... }:
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{
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imports = [
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../../profiles/base.nix
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../../profiles/installation-device.nix
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./sd-image.nix
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];
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boot.loader.grub.enable = false;
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boot.loader.generic-extlinux-compatible.enable = true;
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boot.consoleLogLevel = lib.mkDefault 7;
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# The serial ports listed here are:
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# - ttyS0: for Tegra (Jetson TX1)
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# - ttyAMA0: for QEMU's -machine virt
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# Also increase the amount of CMA to ensure the virtual console on the RPi3 works.
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boot.kernelParams = ["cma=32M" "console=ttyS0,115200n8" "console=ttyAMA0,115200n8" "console=tty0"];
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boot.initrd.availableKernelModules = [
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# Allows early (earlier) modesetting for the Raspberry Pi
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"vc4" "bcm2835_dma" "i2c_bcm2835"
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# Allows early (earlier) modesetting for Allwinner SoCs
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"sun4i_drm" "sun8i_drm_hdmi" "sun8i_mixer"
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];
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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 ${configTxt} firmware/config.txt
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'';
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populateRootCommands = ''
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mkdir -p ./files/boot
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2020-07-18 16:06:22 +00:00
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${config.boot.loader.generic-extlinux-compatible.populateCmd} -c ${config.system.build.toplevel} -d ./files/boot
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2020-04-24 23:36:52 +00:00
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'';
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};
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# the installation media is also the installation target,
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# so we don't want to provide the installation configuration.nix.
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installer.cloneConfig = false;
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}
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