image: Add rock64 support.

* gnu/system/images/rock64.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Adjust accordingly.

gnu/local.mk

@@ -664,6 +664,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/system/images/novena.scm			\
   %D%/system/images/pine64.scm			\
   %D%/system/images/pinebook-pro.scm		\
+  %D%/system/images/rock64.scm			\
 						\
   %D%/machine.scm				\
 						\

gnu/system/images/rock64.scm

@@ -0,0 +1,64 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2021 Marius Bakke <marius@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu system images rock64)
+  #:use-module (gnu bootloader)
+  #:use-module (gnu bootloader u-boot)
+  #:use-module (gnu image)
+  #:use-module (gnu packages linux)
+  #:use-module (gnu services)
+  #:use-module (gnu services base)
+  #:use-module (gnu services networking)
+  #:use-module (gnu system)
+  #:use-module (gnu system file-systems)
+  #:use-module (gnu system image)
+  #:use-module (srfi srfi-26)
+  #:export (rock64-barebones-os
+            rock64-image-type
+            rock64-barebones-raw-image))
+
+(define rock64-barebones-os
+  (operating-system
+    (host-name "jiehkkevarri")
+    (timezone "Europe/Oslo")
+    (locale "en_US.utf8")
+    (bootloader (bootloader-configuration
+                 (bootloader u-boot-rock64-rk3328-bootloader)
+                 (target "/dev/sda")))
+    (initrd-modules '())
+    (kernel linux-libre-arm64-generic)
+    (file-systems (cons (file-system
+                          (device (file-system-label "my-root"))
+                          (mount-point "/")
+                          (type "ext4"))
+                        %base-file-systems))
+    (services (append (list (service dhcp-client-service-type))
+                      %base-services))))
+
+(define rock64-image-type
+  (image-type
+   (name 'rock64-raw)
+   (constructor (cut image-with-os (arm64-disk-image (expt 2 24)) <>))))
+
+(define rock64-barebones-raw-image
+  (image
+   (inherit
+    (os->image rock64-barebones-os #:type rock64-image-type))
+   (name 'rock64-barebones-raw-image)))
+
+rock64-barebones-raw-image