[bug#72457] [PATCH v6 08/12] gnu: bootloader: u-boot: Rewrite completely.

[Herman Rimm]

From: Lilah Tascheter <lilah@lunabee.space>

* gnu/bootloader/u-boot.scm (u-boot-bootloader): Delete variable.
(make-install-u-boot): Add procedure.
(define-u-bootloader): Add macro.
(u-boot-*-bootloader): Use define-u-bootloader.
(install-*u-boot): Remove variables.
* gnu/system/install.scm (os-with-u-boot): Remove procedure.
* doc/guix.texi (System Installation)[Building the Installation Image]:
Use beaglebone as the example.

Change-Id: I3654d160f7306bb45a78b82ea6b249ff4281f739
---
 doc/guix.texi             |   8 +-
 gnu/bootloader/u-boot.scm | 466 +++++++++++++-------------------------
 gnu/system/install.scm    |  16 +-
 3 files changed, 168 insertions(+), 322 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 4168310135..a3338b098a 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -2666,11 +2666,13 @@ Building the Installation Image
 includes the bootloader, specifically:
 
 @example
-guix system image --system=armhf-linux -e '((@@ (gnu system install) 
os-with-u-boot) (@@ (gnu system install) installation-os) 
"A20-OLinuXino-Lime2")'
+guix system image --system=armhf-linux -e '(@ (gnu system install) 
beaglebone-black-installation-os)'
 @end example
 
-@code{A20-OLinuXino-Lime2} is the name of the board.  If you specify an invalid
-board, a list of possible boards will be printed.
+@code{beaglebone-black} is the name of the board.  Similar
+@code{installation-os} variables exist for most other supported boards.
+Otherwise, you can use @code{embedded-installation-os}, passing it a u-boot
+bootloader and the desired console tty.
 
 
 @c *********************************************************************
diff --git a/gnu/bootloader/u-boot.scm b/gnu/bootloader/u-boot.scm
index 7fd7288854..2d351c9dc2 100644
--- a/gnu/bootloader/u-boot.scm
+++ b/gnu/bootloader/u-boot.scm
@@ -7,6 +7,7 @@
 ;;; Copyright © 2023 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2023-2024 Herman Rimm <herman@rimm.ee>
 ;;; Copyright © 2024 Zheng Junjie <873216071@qq.com>
+;;; Copyright © 2024 Lilah Tascheter <lilah@lunabee.space>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -24,12 +25,11 @@
 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (gnu bootloader u-boot)
-  #:use-module (gnu bootloader extlinux)
   #:use-module (gnu bootloader)
+  #:use-module (gnu bootloader extlinux)
   #:use-module (gnu packages bootloaders)
   #:use-module (guix gexp)
-  #:export (u-boot-bootloader
-            u-boot-a20-olinuxino-lime-bootloader
+  #:export (u-boot-a20-olinuxino-lime-bootloader
             u-boot-a20-olinuxino-lime2-bootloader
             u-boot-a20-olinuxino-micro-bootloader
             u-boot-bananapi-m2-ultra-bootloader
@@ -55,321 +55,179 @@ (define-module (gnu bootloader u-boot)
             u-boot-ts7970-q-2g-1000mhz-c-bootloader
             u-boot-wandboard-bootloader))
 
-(define install-u-boot
-  #~(lambda (bootloader root-index image)
-      (if bootloader
-        (error "Failed to install U-Boot"))))
+(define (make-install-u-boot firmware installers)
+  (lambda* (#:key bootloader-config #:allow-other-keys . args)
+    (with-targets (bootloader-configuration-targets bootloader-config)
+      ('extlinux (apply install-extlinux-config args))
+      (('install => (path :path)) #~(let ((path #$path)) #$firmware))
+      (('disk => (disk :device)) #~(let ((disk #$disk)) #f #$@installers)))))
+
+(define-syntax-rule (define-u-bootloader def-name package firmware
+                                         (file size doffset) ...)
+  "Defines a U-Boot installer DEF-NAME, using u-boot PACKAGE.  Installs
+each given FILE of SIZE (or #f to autodetect) to the targeted disk at
+OFFSET.  FIRMWARE is ran on the U-Boot firmware directory to install
+supporting files, with the directory path as the local variable 'path'."
+  (define def-name
+    (bootloader
+      (name 'u-boot)
+      (default-targets (list (bootloader-target
+                               (type 'install)
+                               (offset 'root)
+                               (path "boot"))
+                             (bootloader-target
+                               (type 'extlinux)
+                               (offset 'install)
+                               (path "extlinux"))))
+      (installer
+        (make-install-u-boot
+          firmware
+          (list #~(let ((fw #$(file-append package "/libexec/" file)))
+                    (write-file-on-device fw
+                      #$(or size #~(stat:size (stat fw)))
+                      disk #$doffset)) ...))))))
+
+
+;;;
+;;; Bootloader definitions.
+;;;
 
-(define install-beaglebone-black-u-boot
+(define-u-bootloader u-boot-beaglebone-black-bootloader
+  u-boot-am335x-boneblack #f
   ;; 
http://wiki.beyondlogic.org/index.php?title=BeagleBoneBlack_Upgrading_uBoot
   ;; This first stage bootloader called MLO (U-Boot SPL) is expected at
   ;; 0x20000 by BBB ROM code. The second stage bootloader will be loaded by
   ;; the MLO and is expected at 0x60000.  Write both first stage ("MLO") and
-  ;; second stage ("u-boot.img") images, read in BOOTLOADER directory, to the
-  ;; specified DEVICE.
-  #~(lambda (bootloader root-index image)
-      (let ((mlo (string-append bootloader "/libexec/MLO"))
-            (u-boot (string-append bootloader "/libexec/u-boot.img")))
-        (write-file-on-device mlo (* 256 512)
-                              image (* 256 512))
-        (write-file-on-device u-boot (* 1024 512)
-                              image (* 768 512)))))
-
-(define install-allwinner-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((u-boot (string-append bootloader
-                                   "/libexec/u-boot-sunxi-with-spl.bin")))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 8 1024)))))
-
-(define install-allwinner64-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((spl (string-append bootloader 
"/libexec/u-boot-sunxi-with-spl.bin"))
-            (u-boot (string-append bootloader 
"/libexec/u-boot-sunxi-with-spl.fit.itb")))
-        (write-file-on-device spl (stat:size (stat spl))
-                              image (* 8 1024))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 40 1024)))))
-
-(define install-imx-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((spl (string-append bootloader "/libexec/SPL"))
-            (u-boot (string-append bootloader "/libexec/u-boot.img")))
-        (write-file-on-device spl (stat:size (stat spl))
-                              image (* 1 1024))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 69 1024)))))
-
-(define install-nanopi-r4s-rk3399-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((spl (string-append bootloader "/libexec/idbloader.img"))
-            (u-boot (string-append bootloader "/libexec/u-boot.itb")))
-        (write-file-on-device spl (stat:size (stat spl))
-                              image (* 64 512))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 16384 512)))))
-
-(define install-orangepi-r1-plus-lts-rk3328-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((idb (string-append bootloader "/libexec/idbloader.img"))
-            (u-boot (string-append bootloader "/libexec/u-boot.itb")))
-        (write-file-on-device idb (stat:size (stat idb))
-                              image (* 64 512))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 16384 512)))))
-
-(define install-puma-rk3399-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((spl (string-append bootloader "/libexec/idbloader.img"))
-            (u-boot (string-append bootloader "/libexec/u-boot.itb")))
-        (write-file-on-device spl (stat:size (stat spl))
-                              image (* 64 512))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 512 512)))))
-
-(define install-firefly-rk3399-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((idb (string-append bootloader "/libexec/idbloader.img"))
-            (u-boot (string-append bootloader "/libexec/u-boot.itb")))
-        (write-file-on-device idb (stat:size (stat idb))
-                              image (* 64 512))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 16384 512)))))
-
-(define install-rock64-rk3328-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((idb (string-append bootloader "/libexec/idbloader.img"))
-            (u-boot (string-append bootloader "/libexec/u-boot.itb")))
-        (write-file-on-device idb (stat:size (stat idb))
-                              image (* 64 512))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 16384 512)))))
-
-(define install-rockpro64-rk3399-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((idb (string-append bootloader "/libexec/idbloader.img"))
-            (u-boot (string-append bootloader "/libexec/u-boot.itb")))
-        (write-file-on-device idb (stat:size (stat idb))
-                              image (* 64 512))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 16384 512)))))
-
-(define install-pinebook-pro-rk3399-u-boot install-rockpro64-rk3399-u-boot)
-
-(define install-u-boot-ts7970-q-2g-1000mhz-c-u-boot
-  #~(lambda (bootloader device mount-point)
-      (let ((u-boot.imx (string-append bootloader "/libexec/u-boot.imx"))
-            (install-dir (string-append mount-point "/boot")))
-        (install-file u-boot.imx install-dir))))
-
-(define install-sifive-unmatched-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((spl (string-append bootloader "/libexec/spl/u-boot-spl.bin"))
-            (u-boot (string-append bootloader "/libexec/u-boot.itb")))
-        (write-file-on-device spl (stat:size (stat spl))
-                              image (* 34 512))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 2082 512)))))
-
-(define install-starfive-visionfive2-u-boot
-  #~(lambda (bootloader root-index image)
-      (let ((spl (string-append
-                  bootloader "/libexec/spl/u-boot-spl.bin.normal.out"))
-            (u-boot (string-append bootloader "/libexec/u-boot.itb")))
-        (write-file-on-device spl (stat:size (stat spl))
-                              image (* 34 512))
-        (write-file-on-device u-boot (stat:size (stat u-boot))
-                              image (* 2082 512)))))
-
-(define install-starfive-visionfive2-uEnv.txt
-  #~(lambda (bootloader device mount-point)
-      (mkdir-p (string-append mount-point "/boot"))
-      (call-with-output-file (string-append mount-point "/boot/uEnv.txt")
+  ;; second stage ("u-boot.img") images to the target.
+  ("MLO"        (* 256 512)  (* 256 512))
+  ("u-boot.img" (* 1024 512) (* 768 512)))
+
+(define-u-bootloader u-boot-sifive-unmatched-bootloader
+  u-boot-sifive-unmatched #f
+  ("spl/u-boot-spl.bin" #f (* 34 512))
+  ("u-boot.itb"         #f (* 2082 512)))
+
+(define-u-bootloader u-boot-starfive-visionfive2-bootloader
+  u-boot-starfive-visionfive2
+  #~(begin (mkdir-p path)
+      (call-with-output-file (string-append path "/uEnv.txt")
         (lambda (port)
           (format port
-                  ;; if board SPI use vender's u-boot, will find
-                  ;; ""starfive/starfive_visionfive2.dtb"", We cannot guarantee
-                  ;; that users will update this u-boot, so set it.
-                  
"fdtfile=starfive/jh7110-starfive-visionfive-2-v1.3b.dtb~%")))))
+            ;; if board SPI use vender's u-boot, will find
+            ;; ""starfive/starfive_visionfive2.dtb"", We cannot guarantee
+            ;; that users will update this u-boot, so set it.
+            "fdtfile=starfive/jh7110-starfive-visionfive-2-v1.3b.dtb~%"))))
+  ("spl/u-boot-spl.bin.normal.out" #f (* 34 512))
+  ("u-boot.itb"                    #f (* 2082 512)))
+
+
+;;;
+;;; Allwinner bootloader definitions.
+;;;
+(define-syntax-rule (define-u-bootloader-allwinner def-name package)
+  (define-u-bootloader def-name package #f
+    ("u-boot-sunxi-with-spl.bin" #f (* 8 1024))))
+
 
-(define install-qemu-riscv64-u-boot
-  #~(lambda (bootloader device mount-point)
-      (let ((u-boot.bin (string-append bootloader "/libexec/u-boot.bin"))
-            (install-dir (string-append mount-point "/boot")))
-        (install-file u-boot.bin install-dir))))
+(define-u-bootloader-allwinner u-boot-nintendo-nes-classic-edition-bootloader
+  u-boot-nintendo-nes-classic-edition)
+
+(define-u-bootloader-allwinner u-boot-a20-olinuxino-lime-bootloader
+  u-boot-a20-olinuxino-lime)
+
+(define-u-bootloader-allwinner u-boot-a20-olinuxino-lime2-bootloader
+  u-boot-a20-olinuxino-lime2)
+
+(define-u-bootloader-allwinner u-boot-a20-olinuxino-micro-bootloader
+  u-boot-a20-olinuxino-micro)
+
+(define-u-bootloader-allwinner u-boot-bananapi-m2-ultra-bootloader
+  u-boot-bananapi-m2-ultra)
+
+(define-u-bootloader-allwinner u-boot-cubietruck-bootloader u-boot-cubietruck)
+
+(define-u-bootloader-allwinner u-boot-pine64-lts-bootloader u-boot-pine64-lts)
+
+(define-u-bootloader-allwinner u-boot-orangepi-zero2w-bootloader
+  u-boot-orangepi-zero2w)
 
 
+;;;
+;;; Allwinner64 bootloader definitions.
+;;;
+(define-syntax-rule (define-u-bootloader-allwinner64 def-name package)
+  (define-u-bootloader def-name package #f
+    ("u-boot-sunxi-with-spl.bin"     #f (* 8 1024))
+    ("u-boot-sunxi-with-spl.fit.itb" #f (* 40 1024))))
 
+(define-u-bootloader-allwinner64 u-boot-pine64-plus-bootloader
+  u-boot-pine64-plus)
+
+(define-u-bootloader-allwinner64 u-boot-pinebook-bootloader u-boot-pinebook)
+
+
 ;;;
-;;; Bootloader definitions.
+;;; IMX bootloader definitions.
 ;;;
+(define-syntax-rule (define-u-bootloader-imx def-name package)
+  (define-u-bootloader def-name package #f
+    ("SPL"        #f (* 8 1024))
+    ("u-boot.img" #f (* 40 1024))))
 
-(define u-boot-bootloader
-  (bootloader
-   (inherit extlinux-bootloader)
-   (name 'u-boot)
-   (package #f)
-   (installer #f)
-   (disk-image-installer install-u-boot)))
-
-(define u-boot-beaglebone-black-bootloader
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-am335x-boneblack)
-   (disk-image-installer install-beaglebone-black-u-boot)))
-
-(define u-boot-allwinner-bootloader
-  (bootloader
-   (inherit u-boot-bootloader)
-   (disk-image-installer install-allwinner-u-boot)))
-
-(define u-boot-allwinner64-bootloader
-  (bootloader
-   (inherit u-boot-bootloader)
-   (disk-image-installer install-allwinner64-u-boot)))
-
-(define u-boot-imx-bootloader
-  (bootloader
-   (inherit u-boot-bootloader)
-   (disk-image-installer install-imx-u-boot)))
-
-(define u-boot-nintendo-nes-classic-edition-bootloader
-  (bootloader
-    (inherit u-boot-allwinner-bootloader)
-    (package u-boot-nintendo-nes-classic-edition)))
-
-(define u-boot-a20-olinuxino-lime-bootloader
-  (bootloader
-   (inherit u-boot-allwinner-bootloader)
-   (package u-boot-a20-olinuxino-lime)))
-
-(define u-boot-a20-olinuxino-lime2-bootloader
-  (bootloader
-   (inherit u-boot-allwinner-bootloader)
-   (package u-boot-a20-olinuxino-lime2)))
-
-(define u-boot-a20-olinuxino-micro-bootloader
-  (bootloader
-   (inherit u-boot-allwinner-bootloader)
-   (package u-boot-a20-olinuxino-micro)))
-
-(define u-boot-bananapi-m2-ultra-bootloader
-  (bootloader
-   (inherit u-boot-allwinner-bootloader)
-   (package u-boot-bananapi-m2-ultra)))
-
-(define u-boot-cubietruck-bootloader
-  (bootloader
-    (inherit u-boot-allwinner-bootloader)
-    (package u-boot-cubietruck)))
-
-(define u-boot-firefly-rk3399-bootloader
-  ;; SD and eMMC use the same format
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-firefly-rk3399)
-   (disk-image-installer install-firefly-rk3399-u-boot)))
-
-(define u-boot-mx6cuboxi-bootloader
-  (bootloader
-   (inherit u-boot-imx-bootloader)
-   (package u-boot-mx6cuboxi)))
-
-(define u-boot-wandboard-bootloader
-  (bootloader
-   (inherit u-boot-imx-bootloader)
-   (package u-boot-wandboard)))
-
-(define u-boot-novena-bootloader
-  (bootloader
-   (inherit u-boot-imx-bootloader)
-   (package u-boot-novena)))
-
-(define u-boot-nanopi-r4s-rk3399-bootloader
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-nanopi-r4s-rk3399)
-   (disk-image-installer install-nanopi-r4s-rk3399-u-boot)))
-
-(define u-boot-orangepi-r1-plus-lts-rk3328-bootloader
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-orangepi-r1-plus-lts-rk3328)
-   (disk-image-installer install-orangepi-r1-plus-lts-rk3328-u-boot)))
-
-(define u-boot-orangepi-zero2w-bootloader
-  (bootloader
-   (inherit u-boot-allwinner-bootloader)
-   (package u-boot-orangepi-zero2w)))
-
-(define u-boot-pine64-plus-bootloader
-  (bootloader
-   (inherit u-boot-allwinner64-bootloader)
-   (package u-boot-pine64-plus)))
-
-(define u-boot-pine64-lts-bootloader
-  (bootloader
-   (inherit u-boot-allwinner-bootloader)
-   (package u-boot-pine64-lts)))
-
-(define u-boot-pinebook-bootloader
-  (bootloader
-   (inherit u-boot-allwinner64-bootloader)
-   (package u-boot-pinebook)))
-
-(define u-boot-puma-rk3399-bootloader
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-puma-rk3399)
-   (disk-image-installer install-puma-rk3399-u-boot)))
-
-(define u-boot-rock64-rk3328-bootloader
-  ;; SD and eMMC use the same format
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-rock64-rk3328)
-   (disk-image-installer install-rock64-rk3328-u-boot)))
 
-(define u-boot-rockpro64-rk3399-bootloader
-  ;; SD and eMMC use the same format
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-rockpro64-rk3399)
-   (disk-image-installer install-rockpro64-rk3399-u-boot)))
+(define-u-bootloader-imx u-boot-mx6cuboxi-bootloader u-boot-mx6cuboxi)
+
+(define-u-bootloader-imx u-boot-wandboard-bootloader u-boot-wandboard)
+
+(define-u-bootloader-imx u-boot-novena-bootloader u-boot-novena)
 
-(define u-boot-pinebook-pro-rk3399-bootloader
+
+;;;
+;;; Rockchip bootloader definitions.
+;;;
+(define-syntax-rule (define-u-bootloader-rockchip def-name package)
   ;; SD and eMMC use the same format
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-pinebook-pro-rk3399)
-   (disk-image-installer install-pinebook-pro-rk3399-u-boot)))
-
-(define u-boot-ts7970-q-2g-1000mhz-c-bootloader
-  ;; This bootloader doesn't really need to be installed, as it is read from
-  ;; an SPI memory chip, not the SD card.  It is copied to /boot/u-boot.imx
-  ;; for convenience and should be manually flashed at the U-Boot prompt.
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-ts7970-q-2g-1000mhz-c)
-   (installer install-u-boot-ts7970-q-2g-1000mhz-c-u-boot)
-   (disk-image-installer #f)))
-
-(define u-boot-sifive-unmatched-bootloader
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-sifive-unmatched)
-   (disk-image-installer install-sifive-unmatched-u-boot)))
-
-(define u-boot-starfive-visionfive2-bootloader
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-starfive-visionfive2)
-   (installer install-starfive-visionfive2-uEnv.txt)
-   (disk-image-installer install-starfive-visionfive2-u-boot)))
-
-(define u-boot-qemu-riscv64-bootloader
-  (bootloader
-   (inherit u-boot-bootloader)
-   (package u-boot-qemu-riscv64)
-   (installer install-qemu-riscv64-u-boot)
-   (disk-image-installer #f)))
+  (define-u-bootloader def-name package #f
+    ("idbloader.img" #f (* 64 512))
+    ("u-boot.itb"    #f (* 16384 512))))
+
+(define-u-bootloader-rockchip u-boot-firefly-rk3399-bootloader
+  u-boot-firefly-rk3399)
+
+(define-u-bootloader-rockchip u-boot-nanopi-r4s-rk3399-bootloader
+  u-boot-nanopi-r4s-rk3399)
+
+(define-u-bootloader-rockchip u-boot-orangepi-r1-plus-lts-rk3328-bootloader
+  u-boot-orangepi-r1-plus-lts-rk3328)
+
+(define-u-bootloader-rockchip u-boot-rock64-rk3328-bootloader
+  u-boot-rock64-rk3328)
+
+(define-u-bootloader-rockchip u-boot-rockpro64-rk3399-bootloader
+  u-boot-rockpro64-rk3399)
+
+(define-u-bootloader-rockchip u-boot-pinebook-pro-rk3399-bootloader
+  u-boot-pinebook-pro-rk3399)
+
+(define-u-bootloader u-boot-puma-rk3399-bootloader u-boot-puma-rk3399 #f
+  ("idbloader.img" #f (* 64 512))
+  ("u-boot.itb"    #f (* 512 512)))
+
+
+;;;
+;;; Copy-only bootloader definitions.
+;;;
+
+;; These bootloaders don't really need to be installed, as they are read from
+;; an SPI memory chip  or directly from the FS, not the disk.
+(define-syntax-rule (define-u-bootloader-copy def-name package file)
+  (define-u-bootloader def-name package
+    #~(install-file #$(file-append package "/libexec/" file) path)))
+
+;; user should manually install this to SPI flash
+;; TODO: write directly to SPI flash? unless wear issues are a problem.
+(define-u-bootloader-copy u-boot-ts7970-q-2g-1000mhz-c-bootloader
+  u-boot-ts7970-q-2g-1000mhz-c "u-boot.imx")
+
+(define-u-bootloader-copy u-boot-qemu-riscv64-bootloader
+  u-boot-qemu-riscv64 "u-boot.bin")
diff --git a/gnu/system/install.scm b/gnu/system/install.scm
index 2d0c9875fb..82f2c451dd 100644
--- a/gnu/system/install.scm
+++ b/gnu/system/install.scm
@@ -78,8 +78,7 @@ (define-module (gnu system install)
             rock64-installation-os
             rockpro64-installation-os
             rk3399-puma-installation-os
-            wandboard-installation-os
-            os-with-u-boot))
+            wandboard-installation-os))
 
 ;;; Commentary:
 ;;;
@@ -555,19 +554,6 @@ (define installation-os
                 %installer-disk-utilities
                 %base-packages))))
 
-(define* (os-with-u-boot os board #:key (bootloader-target "/dev/mmcblk0")
-                         (triplet "arm-linux-gnueabihf"))
-  "Given OS, amend it with the u-boot bootloader for BOARD,
-installed to BOOTLOADER-TARGET (a drive), compiled for TRIPLET.
-
-If you want a serial console, make sure to specify one in your
-operating-system's kernel-arguments (\"console=ttyS0\" or similar)."
-  (operating-system (inherit os)
-    (bootloader (bootloader-configuration
-                 (bootloader (bootloader (inherit u-boot-bootloader)
-                              (package (make-u-boot-package board triplet))))
-                 (targets (list bootloader-target))))))
-
 (define* (embedded-installation-os bootloader #:optional
                                    (tty "ttyS0")
                                    (extra-modules '())
-- 
2.45.2