Colin
1064867194
this requires a patch to uboot: - uboot thinks the drive has a capacity of 0 (i.e. 'unknown'). unclear precisely why. could be noncompliant drive firmware, or a timeout somewhere. and a patch to the rpi bootloader: - in order to trampoline into the rpi-4 uboot. and custom kernel modules in the initrd: - in order to detect the USB hub (rpi fw). additionally, i'm MANUALLY placing `bcm2711-rpi-400.dtb` into `/boot/nixos/..-linux-5.10.111-dtbs/broadcom`. i'll want to do this automatically over time. i hope to simplify much of this over time: this is just the first thing which works after a couple days of hacking at it.
102 lines
2.8 KiB
Nix
102 lines
2.8 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.boot.loader.raspberryPiColin;
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builderUboot = import ./uboot-builder.nix { inherit pkgs configTxt; inherit (cfg) version; };
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builderGeneric = import ./raspberrypi-builder.nix { inherit pkgs configTxt; };
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builder =
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if cfg.uboot.enable then
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"${builderUboot} -g ${toString cfg.uboot.configurationLimit} -t ${timeoutStr} -c"
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else
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"${builderGeneric} -c";
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blCfg = config.boot.loader;
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timeoutStr = if blCfg.timeout == null then "-1" else toString blCfg.timeout;
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isAarch64 = pkgs.stdenv.hostPlatform.isAarch64;
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optional = pkgs.lib.optionalString;
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configTxt =
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pkgs.writeText "config.txt" (''
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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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'' + optional isAarch64 ''
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# Boot in 64-bit mode.
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arm_64bit=1
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'' + (if cfg.uboot.enable then ''
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kernel=u-boot-rpi.bin
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'' else ''
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kernel=kernel.img
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initramfs initrd followkernel
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'') + optional (cfg.firmwareConfig != null) cfg.firmwareConfig);
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in
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{
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options = {
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boot.loader.raspberryPiColin = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether to create files with the system generations in
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<literal>/boot</literal>.
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<literal>/boot/old</literal> will hold files from old generations.
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'';
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};
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version = mkOption {
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default = 2;
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type = types.enum [ 0 1 2 3 4 ];
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description = "";
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};
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uboot = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Enable using uboot as bootmanager for the raspberry pi.
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'';
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};
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configurationLimit = mkOption {
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default = 20;
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example = 10;
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type = types.int;
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description = ''
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Maximum number of configurations in the boot menu.
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'';
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};
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};
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firmwareConfig = mkOption {
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default = null;
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type = types.nullOr types.lines;
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description = ''
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Extra options that will be appended to <literal>/boot/config.txt</literal> file.
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For possible values, see: https://www.raspberrypi.org/documentation/configuration/config-txt/
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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system.build.installBootLoader = builder;
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system.boot.loader.id = "raspberrypi";
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system.boot.loader.kernelFile = pkgs.stdenv.hostPlatform.linux-kernel.target;
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};
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}
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