1781d283f3
This is effective on the Pi 400 and on newer board revisions of the Pi 4B. From the official documentation: > New Raspberry Pi OS images from Bullseye onwards come with > this setting by default. <https://www.raspberrypi.com/documentation/computers/config_txt.html>
75 lines
2.3 KiB
Nix
75 lines
2.3 KiB
Nix
# To build, use:
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# nix-build nixos -I nixos-config=nixos/modules/installer/sd-card/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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./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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boot.kernelParams = ["console=ttyS0,115200n8" "console=ttyAMA0,115200n8" "console=tty0"];
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sdImage = {
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populateFirmwareCommands = let
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configTxt = pkgs.writeText "config.txt" ''
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[pi3]
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kernel=u-boot-rpi3.bin
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[pi02]
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kernel=u-boot-rpi3.bin
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[pi4]
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kernel=u-boot-rpi4.bin
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enable_gic=1
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armstub=armstub8-gic.bin
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# Otherwise the resolution will be weird in most cases, compared to
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# what the pi3 firmware does by default.
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disable_overscan=1
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# Supported in newer board revisions
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arm_boost=1
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[all]
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# Boot in 64-bit mode.
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arm_64bit=1
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# U-Boot needs this to work, regardless of whether UART is actually used or not.
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# Look in arch/arm/mach-bcm283x/Kconfig in the U-Boot tree to see if this is still
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# a requirement in the future.
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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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# Add the config
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cp ${configTxt} firmware/config.txt
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# Add pi3 specific files
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cp ${pkgs.ubootRaspberryPi3_64bit}/u-boot.bin firmware/u-boot-rpi3.bin
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# Add pi4 specific files
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cp ${pkgs.ubootRaspberryPi4_64bit}/u-boot.bin firmware/u-boot-rpi4.bin
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cp ${pkgs.raspberrypi-armstubs}/armstub8-gic.bin firmware/armstub8-gic.bin
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cp ${pkgs.raspberrypifw}/share/raspberrypi/boot/bcm2711-rpi-4-b.dtb firmware/
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'';
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populateRootCommands = ''
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mkdir -p ./files/boot
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${config.boot.loader.generic-extlinux-compatible.populateCmd} -c ${config.system.build.toplevel} -d ./files/boot
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'';
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};
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}
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