guix/gnu/bootloader/depthcharge.scm

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Timothy Sample <samplet@ngyro.com>
;;; Copyright © 2024 Lilah Tascheter <lilah@lunabee.space>
;;;
;;; 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.
;;;
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;;; 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.
;;;
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;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu bootloader depthcharge)
  #:use-module (gnu bootloader)
  #:use-module (gnu packages bootloaders)
  #:use-module (gnu system boot)
  #:use-module (guix gexp)
  #:use-module (guix deprecation)
  #:use-module (guix diagnostics)
  #:use-module (guix i18n)
  #:use-module (guix records)
  #:use-module (guix utils)
  #:use-module (srfi srfi-26)
  #:use-module (srfi srfi-35)
  #:export (depthcharge-veyron-speedy-bootloader
            depthcharge-bootloader))

(define* (install-depthcharge arch dtb
                              #:key bootloader-config current-boot-alternative
                              #:allow-other-keys)
  (when (not (null? (bootloader-configuration-menu-entries bootloader-config)))
    (raise (formatted-message
             (G_ "extra menu-entries are not supported for depthcharge!"))))
  (with-targets (bootloader-configuration-targets bootloader-config)
    ;; use 'part instead of 'disk, cause we write an image directly into a
    ;; partition instead of the extra-partition disk space
    (('part => (disk :device))
     (match-menu-entry
       (boot-alternative->menu-entry current-boot-alternative)
       (linux linux-arguments initrd)
       #~(begin
           (use-modules (ice-9 binary-ports) (rnrs bytevectors))
           (set-path-environment-variable "PATH" '("bin") (list #$dtc))

           ;; TODO: These files have to be writable, so we copy them.
           ;; This can probably be fixed by using a ".its" file, just
           ;; be careful not to break initrd loading.
           (copy-file #$linux "zImage")
           (chmod "zImage" #o755)
           (copy-file (string-append (dirname #$linux) "/lib/dtbs/" #$dtb)
                      "dtb")
           (chmod "dtb" #o644)
           (copy-file #$initrd "initrd")
           (chmod "initrd" #o644)

           (invoke #+(file-append u-boot-tools "/bin/mkimage")
                     "-D" "-I dts -O dtb -p 2048"
                     "-f" "auto" ; format
                     "-A" #$arch ; architecture
                     "-O" "linux" ; os
                     "-T" "kernel" ; image type
                     "-C" "None" ; compression
                     "-d" "zImage" ; image data
                     "-a" "0" ; load address (hex)
                     "-b" "dtb" ; dtb for device
                     "-i" "initrd" ; initrd
                     "image.itb")
           (call-with-output-file "bootloader.bin"
             (lambda (port)
               (put-bytevector port (make-bytevector 512 0))))
           (call-with-output-file "kernel-arguments"
             (lambda (port)
               (display (string-join (list #$@linux-arguments)) port)))
           (invoke #+(file-append vboot-utils "/bin/vbutil_kernel")
                   "--version" "1"
                   "--vmlinuz" "image.itb"
                   "--arch" #$arch
                   "--keyblock"
                   #$(file-append vboot-utils
                       "/share/vboot-utils/devkeys/kernel.keyblock")
                   "--signprivate"
                   #$(file-append vboot-utils
                       "/share/vboot-utils/devkeys/kernel_data_key.vbprivk")
                   "--config" "kernel-arguments"
                   "--pack" "vmlinux.kpart")
           (write-file-on-device "vmlinux.kpart"
                                 (stat:size (stat "vmlinux.kpart"))
                                 #$disk 0))))))

(define depthcharge-veyron-speedy-bootloader
  (bootloader
   (name 'depthcharge)
   (installer (cute install-depthcharge "arm" "rk3288-veyron-speedy.dtb"
                    <...>))))

(define-deprecated/alias depthcharge-bootloader
  depthcharge-veyron-speedy-bootloader)