59 lines
2 KiB
Nix
59 lines
2 KiB
Nix
# 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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let
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extlinux-conf-builder =
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import ../../system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.nix {
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inherit pkgs;
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};
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in
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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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assertions = lib.singleton {
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assertion = pkgs.stdenv.system == "aarch64-linux";
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message = "sd-image-aarch64.nix can be only built natively on Aarch64 / ARM64; " +
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"it cannot be cross compiled";
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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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boot.kernelPackages = pkgs.linuxPackages_latest;
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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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sdImage = {
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populateBootCommands = 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/boot/)
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cp ${pkgs.ubootRaspberryPi3_64bit}/u-boot.bin boot/u-boot-rpi3.bin
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cp ${configTxt} boot/config.txt
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${extlinux-conf-builder} -t 3 -c ${config.system.build.toplevel} -d ./boot
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'';
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};
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}
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