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01/01: system: Add os-with-u-boot.

From: Danny Milosavljevic
Subject: 01/01: system: Add os-with-u-boot.
Date: Fri, 15 Jun 2018 08:16:51 -0400 (EDT)

dannym pushed a commit to branch master
in repository guix.

commit 4ce4fc501035a8ef461e10d5f3df6ea3a63c7572
Author: Danny Milosavljevic <address@hidden>
Date:   Fri Jun 15 09:52:42 2018 +0200

    system: Add os-with-u-boot.
    * gnu/system/install.scm (os-with-u-boot): New procedure.
    * gnu/packages/bootloaders.scm (make-u-boot-package): Export.
    * doc/guix.texi (Building the Installation Image for ARM Boards): New
 doc/guix.texi                | 16 ++++++++++++++++
 gnu/packages/bootloaders.scm |  2 +-
 gnu/system/install.scm       | 16 +++++++++++++++-
 3 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index d86ac50..a90af34 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -8881,6 +8881,22 @@ Have a look at @file{gnu/system/install.scm} in the 
source tree,
 and see also @ref{Invoking guix system} for more information
 about the installation image.
address@hidden Building the Installation Image for ARM Boards
+Many ARM boards require a specific variant of the
address@hidden://, U-Boot} bootloader.
+If you build a disk image and the bootloader is not available otherwise
+(on another boot drive etc), it's advisable to build an image that
+includes the bootloader, specifically:
+guix system disk-image --system=armhf-linux -e '((@@ (gnu system install) 
os-with-u-boot) (@@ (gnu system install) installation-os) 
address@hidden example
address@hidden is the name of the board.  If you specify an invalid
+board, a list of possible boards will be printed.
 @node System Configuration
 @section System Configuration
diff --git a/gnu/packages/bootloaders.scm b/gnu/packages/bootloaders.scm
index a86c737..c58fe07 100644
--- a/gnu/packages/bootloaders.scm
+++ b/gnu/packages/bootloaders.scm
@@ -439,7 +439,7 @@ def test_ctrl_c"))
 also initializes the boards (RAM etc).  This package provides its
 board-independent tools.")))
-(define (make-u-boot-package board triplet)
+(define-public (make-u-boot-package board triplet)
   "Returns a u-boot package for BOARD cross-compiled for TRIPLET."
   (let ((same-arch? (if (string-prefix? (%current-system)
                                         (gnu-triplet->nix-system triplet))
diff --git a/gnu/system/install.scm b/gnu/system/install.scm
index 35f4ba9..6a3ae19 100644
--- a/gnu/system/install.scm
+++ b/gnu/system/install.scm
@@ -54,7 +54,8 @@
-            wandboard-installation-os))
+            wandboard-installation-os
+            os-with-u-boot))
 ;;; Commentary:
@@ -386,6 +387,19 @@ You have been warned.  Thanks for being so brave.\x1b[0m
                      nvi                          ;:wq!
+(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))))
+                 (target bootloader-target)))))
 (define* (embedded-installation-os bootloader bootloader-target tty
                                    #:key (extra-modules '()))
   "Return an installation os for embedded systems.

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