diff options
Diffstat (limited to 'nixos/modules/system/boot/loader/generic-extlinux-compatible/default.nix')
-rw-r--r-- | nixos/modules/system/boot/loader/generic-extlinux-compatible/default.nix | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/nixos/modules/system/boot/loader/generic-extlinux-compatible/default.nix b/nixos/modules/system/boot/loader/generic-extlinux-compatible/default.nix new file mode 100644 index 00000000000..545b594674f --- /dev/null +++ b/nixos/modules/system/boot/loader/generic-extlinux-compatible/default.nix @@ -0,0 +1,82 @@ +{ config, lib, pkgs, ... }: + +with lib; + +let + blCfg = config.boot.loader; + dtCfg = config.hardware.deviceTree; + cfg = blCfg.generic-extlinux-compatible; + + timeoutStr = if blCfg.timeout == null then "-1" else toString blCfg.timeout; + + # The builder used to write during system activation + builder = import ./extlinux-conf-builder.nix { inherit pkgs; }; + # The builder exposed in populateCmd, which runs on the build architecture + populateBuilder = import ./extlinux-conf-builder.nix { pkgs = pkgs.buildPackages; }; +in +{ + options = { + boot.loader.generic-extlinux-compatible = { + enable = mkOption { + default = false; + type = types.bool; + description = '' + Whether to generate an extlinux-compatible configuration file + under <literal>/boot/extlinux.conf</literal>. For instance, + U-Boot's generic distro boot support uses this file format. + + See <link xlink:href="http://git.denx.de/?p=u-boot.git;a=blob;f=doc/README.distro;hb=refs/heads/master">U-boot's documentation</link> + for more information. + ''; + }; + + useGenerationDeviceTree = mkOption { + default = true; + type = types.bool; + description = '' + Whether to generate Device Tree-related directives in the + extlinux configuration. + + When enabled, the bootloader will attempt to load the device + tree binaries from the generation's kernel. + + Note that this affects all generations, regardless of the + setting value used in their configurations. + ''; + }; + + configurationLimit = mkOption { + default = 20; + example = 10; + type = types.int; + description = '' + Maximum number of configurations in the boot menu. + ''; + }; + + populateCmd = mkOption { + type = types.str; + readOnly = true; + description = '' + Contains the builder command used to populate an image, + honoring all options except the <literal>-c <path-to-default-configuration></literal> + argument. + Useful to have for sdImage.populateRootCommands + ''; + }; + + }; + }; + + config = let + builderArgs = "-g ${toString cfg.configurationLimit} -t ${timeoutStr}" + + lib.optionalString (dtCfg.name != null) " -n ${dtCfg.name}" + + lib.optionalString (!cfg.useGenerationDeviceTree) " -r"; + in + mkIf cfg.enable { + system.build.installBootLoader = "${builder} ${builderArgs} -c"; + system.boot.loader.id = "generic-extlinux-compatible"; + + boot.loader.generic-extlinux-compatible.populateCmd = "${populateBuilder} ${builderArgs}"; + }; +} |