liminix/modules/ramdisk.nix

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{
config
, pkgs
, lib
, ...
}:
let
inherit (lib) mkIf mkEnableOption mkOption; # types concatStringsSep;
in {
options = {
boot = {
ramdisk = {
enable = mkEnableOption (lib.mdDoc ''
Configure kernel to enable reserving part of memory as
an MTD-based RAM disk. Needed for TFTP booting or for
kexec-based revertable upgrade
'');
};
};
};
config = mkIf config.boot.ramdisk.enable {
kernel = {
config = {
MTD = "y";
MTD_PHRAM = "y";
MTD_CMDLINE_PARTS = "y";
MTD_OF_PARTS = "y";
PARTITION_ADVANCED = "y";
MTD_BLKDEVS = "y";
MTD_BLOCK = "y";
};
};
};
}