pyrox.dev
1# To build, use:
2# nix-build nixos -I nixos-config=nixos/modules/installer/cd-dvd/sd-image-armv7l-multiplatform.nix -A config.system.build.sdImage
3{ config, lib, pkgs, ... }:
4
5let
6 extlinux-conf-builder =
7 import ../../system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.nix {
8 inherit pkgs;
9 };
10in
11{
12 imports = [
13 ../../profiles/base.nix
14 ../../profiles/installation-device.nix
15 ./sd-image.nix
16 ];
17
18 assertions = lib.singleton {
19 assertion = pkgs.stdenv.system == "armv7l-linux";
20 message = "sd-image-armv7l-multiplatform.nix can be only built natively on ARMv7; " +
21 "it cannot be cross compiled";
22 };
23
24 # Needed by RPi firmware
25 nixpkgs.config.allowUnfree = true;
26
27 boot.loader.grub.enable = false;
28 boot.loader.generic-extlinux-compatible.enable = true;
29
30 boot.consoleLogLevel = lib.mkDefault 7;
31 boot.kernelPackages = pkgs.linuxPackages_latest;
32 # The serial ports listed here are:
33 # - ttyS0: for Tegra (Jetson TK1)
34 # - ttymxc0: for i.MX6 (Wandboard)
35 # - ttyAMA0: for Allwinner (pcDuino3 Nano) and QEMU's -machine virt
36 # - ttyO0: for OMAP (BeagleBone Black)
37 # - ttySAC2: for Exynos (ODROID-XU3)
38 boot.kernelParams = ["console=ttyS0,115200n8" "console=ttymxc0,115200n8" "console=ttyAMA0,115200n8" "console=ttyO0,115200n8" "console=ttySAC2,115200n8" "console=tty0"];
39
40 # FIXME: this probably should be in installation-device.nix
41 users.extraUsers.root.initialHashedPassword = "";
42
43 sdImage = {
44 populateBootCommands = let
45 configTxt = pkgs.writeText "config.txt" ''
46 # Prevent the firmware from smashing the framebuffer setup done by the mainline kernel
47 # when attempting to show low-voltage or overtemperature warnings.
48 avoid_warnings=1
49
50 [pi2]
51 kernel=u-boot-rpi2.bin
52
53 [pi3]
54 kernel=u-boot-rpi3.bin
55
56 # U-Boot used to need this to work, regardless of whether UART is actually used or not.
57 # TODO: check when/if this can be removed.
58 enable_uart=1
59 '';
60 in ''
61 (cd ${pkgs.raspberrypifw}/share/raspberrypi/boot && cp bootcode.bin fixup*.dat start*.elf $NIX_BUILD_TOP/boot/)
62 cp ${pkgs.ubootRaspberryPi2}/u-boot.bin boot/u-boot-rpi2.bin
63 cp ${pkgs.ubootRaspberryPi3_32bit}/u-boot.bin boot/u-boot-rpi3.bin
64 cp ${configTxt} boot/config.txt
65 ${extlinux-conf-builder} -t 3 -c ${config.system.build.toplevel} -d ./boot
66 '';
67 };
68}