Re: ARM: Installation and Booting; was: Re: GuixSD on ARM;

[Efraim Flashner <efraim@flashner.co.il>]

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On Thu, Jul 14, 2016 at 12:22:13AM +0200, Danny Milosavljevic wrote:
> Work-in-progress gnu/packages/u-boot.scm :
> 
> ;;; GNU Guix --- Functional package management for GNU
> ;;; Copyright © 2016 Danny Milosavljevic <dannym+a@scratchpost.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 packages u-boot)
>   #:use-module (guix download)
>   #:use-module (guix packages)
>   #:use-module ((guix licenses) #:select (gpl2))
>   #:use-module (guix build-system gnu)
>   #:use-module (guix build-system trivial)
>   #:use-module (gnu packages)
>   #:use-module (gnu packages python)
>   #:use-module (gnu packages bison) ; for DTC
>   #:use-module (gnu packages flex) ; for DTC
>   #:use-module (srfi srfi-1)
>   #:use-module ((srfi srfi-1) #:select (last)))
> 

I forget why I cloned the repo, but I have one with a similar name
hanging around my computer
git.kernel.org/pub/scm/linux/kernel/git/devicetree/devicetree-rebasing.git

Also I think the same file as u-boot is the right place for it.

> ;; FIXME move somewhere more fitting
> ;; FIXME add https://launchpad.net/ubuntu/+archive/primary/+files/device-tree-compiler_1.4.0+dfsg-2ubuntu1.diff.gz (massive amount of patches)
> (define-public device-tree-compiler
>   (package
>     (name "device-tree-compiler")
>     (version "1.4.0")
>     (source (origin
>              (method url-fetch)
>              ;; or <https://git.kernel.org/cgit/utils/dtc/dtc.git>
>              (uri (string-append "https://launchpad.net/ubuntu/+archive/primary/+files/"
>                                  "device-tree-compiler_" version "+dfsg.orig.tar.gz"))
>              (sha256
>               (base32
>                "0hzsqkpbgl73fblpnaiczirgwn0hapa7z478xjy6vvkqljpa3ygm"))
>              (modules '((guix build utils)))

as long as you're deleting 'configure you could replace configure with
the substitute.

>              (snippet
>                '(substitute* "Makefile"
>                   (("/usr/bin/install")
>                    "install")))))
>     (home-page "https://git.kernel.org/cgit/utils/dtc/dtc.git")
>     (synopsis "Compiles Device Tree Source Files (.dts)")
>     (description "dtc compiles Device Tree Source Files to Device Tree Binary Files. 
> These are hardware (board) description files (used by Linux and BSD).")
>     (license gpl2)
>     (build-system gnu-build-system)
>     (native-inputs
>      `(("bison" ,bison)
>        ("flex" ,flex)))
>     (arguments
>      `(#:make-flags `("CC=gcc" ,(string-append "HOME=" (assoc-ref %outputs "out"))) ; Note: or patch out PREFIX
>        #:phases (modify-phases %standard-phases
>           (delete 'configure))))))
> 

I think this is the right approach, with a general u-boot that each
board can inherit and make work for them.

> (define u-boot
>   (package
>     (name "u-boot")
>     (version "2016.07")
>     (source (origin
>              (method url-fetch)
>              (uri (string-append "ftp://ftp.denx.de/pub/u-boot/u-boot-" version ".tar.bz2"))
>              (sha256
>               (base32
>                "0lqj4ckmfqiap8mc6z2d5albs3g2h5mzccbn60hsgxhabhibfkwp"))))

we could probably add a snippet here and remove most of the
architectures, but at 11MB its probably not worth it.

>     (home-page "http://www.denx.de/wiki/U-Boot/")
>     (synopsis "ARM Universal Bootloader")
>     (description "FIXME")
>     (license gpl2)
>     (native-inputs
>       `(("python" ,python) ; FIXME required version?
>         ("device-tree-compiler" ,device-tree-compiler)))
>     (build-system  gnu-build-system)
>     (arguments ; FIXME #:tests? #f
>      `(#:make-flags '("HOSTCC=gcc") ; ignored?
>        #:phases (modify-phases %standard-phases
>                   (replace
>                    'configure
>                    (lambda* (#:key outputs #:allow-other-keys)
>                      (let* ((out (assoc-ref outputs "out"))
>                             (parts (string-split (basename out) #\-))
>                             (nameparts (cdddr parts))
>                             (name (string-join nameparts "-"))
>                             (configprefix (string-take name (string-index-right name #\-)))
>                             (configname (string-append configprefix "_defconfig")) #| example: A20-OLinuXino-Lime2_defconfig |#)
>                        (system* "echo" configname)
>                        (zero? (system* "make" "HOSTCC=gcc" configname))
>                        ))))))))
> 
> (define-public u-boot-A20-OLinuXino-Lime2
>   (package (inherit u-boot)
>     (name "u-boot-A20-OLinuXino-Lime2")))
> 
> ; something should:
> ; - create boot.cmd
> ; - run mkimage -C none -A arm -T script -d boot.cmd boot.scr 
> ; - put boot.scr on the first partition
> ; - dd if=u-boot-sunxi-with-spl.bin of=/dev/sdX bs=1024 seek=8
> ;    ^^^ better make sure no partition is there (or just a dummy partition)
> 

with dd being so potentially destructive I think we should have the
users run the dd command themselves, or it could be included as part of
a `guix system init --target=arm-board=/dev/sdX arm-config.scm'


-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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