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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2023 Efraim Flashner <efraim@flashner.co.il>
+;;;
+;;; 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 unmatched)
+ #: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 (guix platforms riscv)
+ #:use-module (srfi srfi-26)
+ #:export (unmatched-barebones-os
+ unmatched-image-type
+ unmatched-barebones-raw-image))
+
+(define unmatched-barebones-os
+ (operating-system
+ (host-name "unmatched")
+ (timezone "Asia/Jerusalem")
+ (locale "en_US.utf8")
+ (bootloader (bootloader-configuration
+ (bootloader u-boot-sifive-unmatched-bootloader)
+ (targets '("/dev/vda"))))
+ (initrd-modules '())
+ (kernel linux-libre-riscv64-generic)
+ (file-systems (cons (file-system
+ (device (file-system-label "my-root"))
+ (mount-point "/")
+ (type "ext4"))
+ %base-file-systems))
+ (services
+ (append (list (service agetty-service-type
+ (agetty-configuration
+ (extra-options '("-L")) ; no carrier detect
+ (baud-rate "115200")
+ (term "vt100")
+ (tty "ttySIF0")))
+ (service dhcp-client-service-type))
+ %base-services))))
+
+(define unmatched-disk-image
+ (image-without-os
+ (format 'disk-image)
+ (partition-table-type 'gpt)
+ ;; https://source.denx.de/u-boot/u-boot/-/blob/master/doc/board/sifive/unmatched.rst
+ ;; The boot process goes:
+ ;; * zero-stage bootloader (ZSBL) in ROM and first-stage bootloader (FSBL)
+ ;; together perform the SoC initialization and hand off to the next stage.
+ ;; * BBL (Berkeley bootloader) takes the device-tree and brings up the rest
+ ;; of the board, then boots the desired operating system.
+ (partitions (list
+ (partition
+ ;; Special UUID for HiFive first-stage bootloader (FSBL).
+ (size (* 1 (expt 2 20)))
+ (label "spl")
+ (offset (* 34 512))
+ (file-system "unformatted")
+ (uuid (uuid "5b193300-fc78-40cd-8002-e86c45580b47")))
+ (partition
+ ;; Specific offset for compatibility with the defaults for
+ ;; u-boot SPL. Special UUID for HiFive BBL (Berkeley bootloader).
+ (size (* 4 (expt 2 20)))
+ (label "uboot")
+ (offset (* 2082 512))
+ (file-system "unformatted")
+ (uuid (uuid "2e54b353-1271-4842-806f-e436d6af6985")))
+ root-partition))))
+
+(define unmatched-image-type
+ (image-type
+ (name 'unmatched-raw)
+ (constructor (cut image-with-os unmatched-disk-image <>))))
+
+(define unmatched-barebones-raw-image
+ (image
+ (inherit
+ (os+platform->image unmatched-barebones-os riscv64-linux
+ #:type unmatched-image-type))
+ (name 'unmatched-barebones-raw-image)))
+
+;; Return the default image.
+unmatched-barebones-raw-image