3
0
Fork 0
forked from mirrors/nixpkgs
nixpkgs/nixos/modules/installer/cd-dvd/sd-image-aarch64.nix
Samuel Dionne-Riel 5d92d16b49 sd-image-aarch64: Allows early modesetting for Allwinner boards
This will reduce the confusion at boot, where the only thing visible is
the last message from u-boot; where it looks like the board is
hung, while in reality it's likely resizing partitions.
2019-06-15 14:26:21 -04:00

60 lines
2 KiB
Nix

# To build, use:
# nix-build nixos -I nixos-config=nixos/modules/installer/cd-dvd/sd-image-aarch64.nix -A config.system.build.sdImage
{ config, lib, pkgs, ... }:
let
extlinux-conf-builder =
import ../../system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.nix {
pkgs = pkgs.buildPackages;
};
in
{
imports = [
../../profiles/base.nix
../../profiles/installation-device.nix
./sd-image.nix
];
boot.loader.grub.enable = false;
boot.loader.generic-extlinux-compatible.enable = true;
boot.consoleLogLevel = lib.mkDefault 7;
# The serial ports listed here are:
# - ttyS0: for Tegra (Jetson TX1)
# - ttyAMA0: for QEMU's -machine virt
# Also increase the amount of CMA to ensure the virtual console on the RPi3 works.
boot.kernelParams = ["cma=32M" "console=ttyS0,115200n8" "console=ttyAMA0,115200n8" "console=tty0"];
boot.initrd.availableKernelModules = [
# Allows early (earlier) modesetting for the Raspberry Pi
"vc4" "bcm2835_dma" "i2c_bcm2835"
# Allows early (earlier) modesetting for Allwinner SoCs
"sun4i_drm" "sun8i_drm_hdmi" "sun8i_mixer"
];
sdImage = {
populateBootCommands = let
configTxt = pkgs.writeText "config.txt" ''
kernel=u-boot-rpi3.bin
# Boot in 64-bit mode.
arm_control=0x200
# U-Boot used to need this to work, regardless of whether UART is actually used or not.
# TODO: check when/if this can be removed.
enable_uart=1
# Prevent the firmware from smashing the framebuffer setup done by the mainline kernel
# when attempting to show low-voltage or overtemperature warnings.
avoid_warnings=1
'';
in ''
(cd ${pkgs.raspberrypifw}/share/raspberrypi/boot && cp bootcode.bin fixup*.dat start*.elf $NIX_BUILD_TOP/boot/)
cp ${pkgs.ubootRaspberryPi3_64bit}/u-boot.bin boot/u-boot-rpi3.bin
cp ${configTxt} boot/config.txt
${extlinux-conf-builder} -t 3 -c ${config.system.build.toplevel} -d ./boot
'';
};
}