add initrd

Author: tstat

rpi/default.nix

@@ -6,6 +6,7 @@ let
   version = cfg.kernel-version;
   board = cfg.board;
   kernel = pkgs.rpi-kernels."${version}"."${board}";
+  initrd = "${config.system.build.initialRamdisk}/${config.system.boot.loader.initrdFile}";
 in
 {
   imports = [ ./config.nix ./i2c.nix ];
@@ -130,6 +131,8 @@ in
                   touch "$STATE_DIRECTORY/kernel-migration-in-progress"
                   cp "$KERNEL" "$TMPFILE"
                   mv -T "$TMPFILE" "$TARGET_FIRMWARE_DIR/kernel.img"
+                  cp "${initrd}" "$TMPFILE"
+                  mv -T "$TMPFILE" "$TARGET_FIRMWARE_DIR/initrd"
                   echo "${
                     builtins.toString kernel
                   }" > "$STATE_DIRECTORY/kernel-version"
@@ -243,6 +246,14 @@ in
             enable = true;
             value = if cfg.uboot.enable then "u-boot-rpi-arm64.bin" else "kernel.img";
           };
+          ramfsfile = {
+            enable = !cfg.uboot.enable;
+            value = "initrd";
+          };
+          ramfsaddr = {
+            enable = !cfg.uboot.enable;
+            value = -1;
+          };
           arm_64bit = {
             enable = true;
             value = true;

sd-image/default.nix

@@ -23,13 +23,15 @@
         version = cfg.kernel-version;
         board = cfg.board;
         kernel = pkgs.rpi-kernels."${version}"."${board}";
+        initrd = "${config.system.build.initialRamdisk}/${config.system.boot.loader.initrdFile}";
         populate-kernel =
           if cfg.uboot.enable
           then ''
             cp ${cfg.uboot.package}/u-boot.bin firmware/u-boot-rpi-arm64.bin
           ''
           else ''
             cp "${kernel}/Image" firmware/kernel.img
+            cp "${initrd}" firmware/initrd
             cp "${kernel-params}" firmware/cmdline.txt
           '';
       in