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This commit is contained in:
Travis Staton 2024-01-24 11:16:46 -05:00
parent b1ac1e98cd
commit 19a8570ec9
2 changed files with 108 additions and 18 deletions
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74
rpi/default.nix
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@ -1,6 +1,8 @@
{ core-overlay, libcamera-overlay }:
{ lib, pkgs, config, ... }:
let cfg = config.raspberry-pi-nix;
in
{
imports = [ ../sd-image ./config.nix ./i2c.nix ];
@ -18,18 +20,41 @@
type = types.bool;
};
};
uboot = {
enable = mkOption {
default = true;
type = types.bool;
};
};
};
};
config = {
boot.kernelParams =
if cfg.uboot.enable then [ ]
else [
"root=PARTUUID=2178694e-02" # todo: use option
"rootfstype=ext4"
"fsck.repair=yes"
"rootwait"
"init=/sbin/init"
];
systemd.services = {
"raspberry-pi-firmware-migrate" =
lib.mkIf config.raspberry-pi-nix.firmware-migration-service.enable {
{
description = "update the firmware partition";
wantedBy = [ "multi-user.target" ];
wantedBy = if cfg.firmware-migration-service.enable then [ "multi-user.target" ] else [ ];
serviceConfig =
let firmware-path = "/boot/firmware";
in {
let
firmware-path = "/boot/firmware";
kernel-params = pkgs.writeTextFile {
name = "cmdline.txt";
text = ''
${lib.strings.concatStringsSep " " config.boot.kernelParams}
'';
};
in
{
Type = "oneshot";
MountImages =
"/dev/disk/by-label/${config.sdImage.firmwarePartitionName}:${firmware-path}";
@ -41,6 +66,8 @@
TARGET_OVERLAYS_DIR="$TARGET_FIRMWARE_DIR/overlays"
TMPFILE="$TARGET_FIRMWARE_DIR/tmp"
UBOOT="${pkgs.uboot_rpi_arm64}/u-boot.bin"
KERNEL="${pkgs.rpi-kernels.latest.kernel}/Image"
SHOULD_UBOOT=${if cfg.uboot.enable then "1" else "0"}
SRC_FIRMWARE_DIR="${pkgs.raspberrypifw}/share/raspberrypi/boot"
STARTFILES=("$SRC_FIRMWARE_DIR"/start*.elf)
DTBS=("$SRC_FIRMWARE_DIR"/*.dtb)
@ -61,6 +88,28 @@
rm "$STATE_DIRECTORY/uboot-migration-in-progress"
}
migrate_kernel() {
echo "migrating kernel"
touch "$STATE_DIRECTORY/kernel-migration-in-progress"
cp "$KERNEL" "$TMPFILE"
mv -T "$TMPFILE" "$TARGET_FIRMWARE_DIR/kernel.img"
echo "${
builtins.toString pkgs.rpi-kernels.latest.kernel
}" > "$STATE_DIRECTORY/kernel-version"
rm "$STATE_DIRECTORY/kernel-migration-in-progress"
}
migrate_cmdline() {
echo "migrating cmdline"
touch "$STATE_DIRECTORY/cmdline-migration-in-progress"
cp "${kernel-params}" "$TMPFILE"
mv -T "$TMPFILE" "$TARGET_FIRMWARE_DIR/cmdline.txt"
echo "${
builtins.toString kernel-params
}" > "$STATE_DIRECTORY/cmdline-version"
rm "$STATE_DIRECTORY/cmdline-migration-in-progress"
}
migrate_config() {
echo "migrating config.txt"
touch "$STATE_DIRECTORY/config-migration-in-progress"
@ -94,12 +143,24 @@
rm "$STATE_DIRECTORY/firmware-migration-in-progress"
}
if [[ -f "$STATE_DIRECTORY/uboot-migration-in-progress" || ! -f "$STATE_DIRECTORY/uboot-version" || $(< "$STATE_DIRECTORY/uboot-version") != ${
if [[ "$SHOULD_UBOOT" -eq 1 ]] && [[ -f "$STATE_DIRECTORY/uboot-migration-in-progress" || ! -f "$STATE_DIRECTORY/uboot-version" || $(< "$STATE_DIRECTORY/uboot-version") != ${
builtins.toString pkgs.uboot_rpi_arm64
} ]]; then
migrate_uboot
fi
if [[ "$SHOULD_UBOOT" -ne 1 ]] && [[ ! -f "$STATE_DIRECTORY/kernel-version" || $(< "$STATE_DIRECTORY/kernel-version") != ${
builtins.toString pkgs.rpi-kernels.latest.kernel
} ]]; then
migrate_kernel
fi
if [[ "$SHOULD_UBOOT" -ne 1 ]] && [[ ! -f "$STATE_DIRECTORY/cmdline-version" || $(< "$STATE_DIRECTORY/cmdline-version") != ${
builtins.toString kernel-params
} ]]; then
migrate_cmdline
fi
if [[ -f "$STATE_DIRECTORY/config-migration-in-progress" || ! -f "$STATE_DIRECTORY/config-version" || $(< "$STATE_DIRECTORY/config-version") != ${
builtins.toString config.hardware.raspberry-pi.config-output
} ]]; then
@ -194,8 +255,9 @@
loader = {
grub.enable = lib.mkDefault false;
initScript.enable = !cfg.uboot.enable;
generic-extlinux-compatible = {
enable = lib.mkDefault true;
enable = lib.mkDefault cfg.uboot.enable;
# We want to use the device tree provided by firmware, so don't
# add FDTDIR to the extlinux conf file.
useGenerationDeviceTree = false;