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<span id="Getting_a_Platform_Firmware"></span>
<span id="Getting_a_Platform_Firmware"></span>
=== Obtenir un ''micrologiciel de plateforme'' ===
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== Obtenir un ''micrologiciel de plateforme'' ==
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{{expansion|D'avantage de détails et des solutions alternatives seraient appréciés}}
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As an opinionated example, you can get started with [https://github.com/Tow-Boot/Tow-Boot Tow-Boot, a ''U-Boot'' distribution], which is intended to make the initial setup a bit easier by abstracting the platform differences so that they do not matter.
As an opinionated example, you can get started with [https://github.com/Tow-Boot/Tow-Boot Tow-Boot, a ''U-Boot'' distribution], which is intended to make the initial setup a bit easier by abstracting the platform differences so that they do not matter.
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Where supported, Nix can be used to build U-boot from its main-line repositories. See [[U-Boot#Building a packaged U-Boot]] for further information. The resulting firmware image can then be flashed to SPI with tools such as <code>flashcp</code> or <code>flashrom</code>, or installed to EMMC/SD card by writing to specific offsets. This is platform specific, refer to [https://github.com/u-boot/u-boot/tree/master/doc/board upstream U-boot documentation for your platform or board].
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<span id="General_Tips"></span>
=== General Tips ===
=== Astuces générales ===
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Utiliser le dernier noyau disponible est une bonne idée. Le support matériel pour les plateformes ARM étant en constante amélioration, utiliser le dernier noyau plutôt que la "dernière LTS" pourrait être bénéfique… ou pas.
Using the latest kernel is probably a good idea. Hardware support for ARM platforms is always improving, and using the latest kernel, rather than the "latest LTS", might be enough to break it or make it.
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<span id="Known_Issues"></span>
== Known Issues ==
== Problèmes connus ==
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<span id="Device_Trees"></span>
=== Device Trees ===
=== Arborescence de périphériques ===
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À ce jour, il n'y a pas de consensus parmi les distributions Linux à propos de la gestion de l'arborescence des périphériques lors de processus de démarrage UEFI.
As of right now, there is no consensus within Linux distros about the topic of managing device trees for the boot process with UEFI.
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La configuration actuelle s'appuie sur le micrologiciel de plateforme pour fournir une arborescence de périphériques appropriée pour le noyau à exécuter.
This current setup relies on the platform firmware providing an appropriate device tree for the kernel that will run.
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Il est possible de faire charger une arborescence de périphériques par ''U-Boot'', plus récente par exemple, en plaçaant le dossier dtb d'une construction de noyau à l'emplacement <code>/dtb</code> de l'ESP. ''U-Boot'' chargera automatiquement une arborescence de périphériques selon l'heuristique, qui devrait être la bonne.
With ''U-Boot'', it is possible to make it load a device tree, for example a more up-to-date one, by placing the dtb folder from a kernel build output at the <code>/dtb</code> location in the ESP. ''U-Boot'' will automatically load a device tree according to heuristics, which should be the right one.
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En pratique, on ne sait pas dans quelle mesure cela constituerait un réel problème.
It is unknown how much of an actual issue this is in practice.
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Retrieved from "https://wiki.nixos.org/wiki/NixOS_on_ARM/UEFI/fr"