From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0B5ADC5DF87 for ; Fri, 21 Aug 2026 13:16:52 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 84EF040F6C; Fri, 21 Aug 2026 13:16:48 +0000 (UTC) X-Virus-Scanned: amavis at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavis, port 10024) with ESMTP id G1mqgsItIIMW; Fri, 21 Aug 2026 13:16:47 +0000 (UTC) X-Comment: SPF check N/A for local connections - client-ip=140.211.166.142; helo=lists1.osuosl.org; envelope-from=u-boot-bounces@lists.u-boot-project.org; receiver= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lists.u-boot-project.org; s=default; t=1787318180; bh=oUX8Qa5GaaBPrcF+48PW/F9FY0sCMoVfogaoHl0KhGY=; h=From:To:Cc:Subject:In-Reply-To:References:Date:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=zpAadZ0oXAM9WB1LxT6fRrGifP1jiU7RYTOK/SbYhnCOuXpd6Nu1a60VeHZjQ2BTP cMVzFRMEAhawJDbuo2izfoUwJVP8IRKRm+VYOkD+Vb0GR26jn7n5VRlAQDsUv0j9at WMe2js7RErjiAtrkPzMRbmjeCdZDBigbsevrwxfNPcl/tGXH4bwntWuB3sliSDOHzA Y/x7EtBtj/xnCMvqWoXby7jVl1a7w5TOENxqKakX4M/5AO++McVbRZxXma2WCe/EGX KgmmSQwJpKGd2AeluHN1n/OQvrnApDR7Aa8Sx6823A7Shli0YurJeP6In4yXK3383G FkkC7E4q3RLrw== Received: from lists1.osuosl.org (lists1.osuosl.org [140.211.166.142]) by smtp4.osuosl.org (Postfix) with ESMTP id 614B340E6D; Fri, 21 Aug 2026 13:16:19 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [IPv6:2605:bc80:3010::137]) by lists1.osuosl.org (Postfix) with ESMTP id BC63D29B for ; Fri, 21 Aug 2026 12:21:45 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id AE2C1408AD for ; Fri, 21 Aug 2026 12:21:45 +0000 (UTC) X-Virus-Scanned: amavis at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavis, port 10024) with ESMTP id HNofLknzrF9M for ; Fri, 21 Aug 2026 12:21:45 +0000 (UTC) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=132.204.25.50; helo=mailscanner.iro.umontreal.ca; envelope-from=monnier@iro.umontreal.ca; receiver= Authentication-Results: smtp4.osuosl.org; dmarc=pass (p=quarantine dis=none) header.from=iro.umontreal.ca Authentication-Results: smtp4.osuosl.org; dkim=pass (2048-bit key, unprotected) header.d=iro.umontreal.ca header.i=@iro.umontreal.ca header.a=rsa-sha256 header.s=mail header.b=E3scE2xt Received: from mailscanner.iro.umontreal.ca (mailscanner.iro.umontreal.ca [132.204.25.50]) by smtp4.osuosl.org (Postfix) with ESMTPS id C1E0B408BC for ; Fri, 21 Aug 2026 12:21:43 +0000 (UTC) Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 60E80802F9; Fri, 21 Aug 2026 08:21:39 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1787314898; bh=zbNiTbctDElauB8o5NY7kJL+Ea8qtMywar2VczjbajY=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=E3scE2xt1XCxZ0WxoVcG7Io9u90KhyB0bEx6iicnWbPflC5KhhaXGWZdqisrkLuIm ZhjLkF4r28SV1ctEpkcY/ZKwgaquIBPhaPUFf5kkMxUYvcqJPfk8+zZ5CfUmSfNHmY qwAr+3oSn7sTYIIGkjHlCXMrLoHLOX3HwHJU+/24W0I5VkEr8AoXTKvlk5sAB05j12 51/dXlU2wnpc7NmyiDzRZyJoCKNE4VjTe/eIHikes8jwPBEY7AgNsiuXi3QojUvA+D xuOfRyY3xLXIpsQ1ZyUUQ+qfX0gpIcXrxRxeFQh3iHnRUNmqycq34ZjBUluELEW/Nn Ju3E3yMrYed4Q== Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id B002780216; Fri, 21 Aug 2026 08:21:38 -0400 (EDT) Received: from pastel (104-195-211-127.cpe.teksavvy.com [104.195.211.127]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 6AD0E120497; Fri, 21 Aug 2026 08:21:38 -0400 (EDT) From: Stefan Monnier To: "Carlo Caione" Cc: , "Jonas Karlman" , "E Shattow" Subject: Re: [PATCH v4 0/5] Add fastboot to SPL In-Reply-To: Message-ID: References: <20260820-ccaione-upstream-spl-fastboot-v4-0-57e5ef71c74d__17726.0234997206$1787249364$gmane$org@baylibre.com> Date: Fri, 21 Aug 2026 08:21:30 -0400 User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Mailman-Approved-At: Fri, 21 Aug 2026 13:12:32 +0000 X-BeenThere: u-boot@lists.u-boot-project.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.u-boot-project.org Carlo Caione [2026-08-21 09:05:37] wrote: > It is possible to include U-Boot proper in the host-loaded bootstrap > and use its existing fastboot implementation. That is a valid approach > and is preferable where the Boot ROM download limit and memory budget > allow it. Right, that's the situation I'm familiar with. > But it is not always possible: some platforms (like the one we are > enabling) impose a strict size limit on the bootstrap, or only provide > enough early memory for the DDR initialization code and (small) > SPL-sized payload. I associate "fastboot" with the Android nebula, so I find it hard to imagine a machine with enough resources to run Android yet with a small enough boot memory for U-Boot not to fit into it. I assume the SPL is pre-installed in some dedicated boot memory (SPI NOR?) whereas the main storage is left uninitialized during production. And the NOR flash is so small that it can't even accommodate a proper U-Boot? I wonder how many cents it saves the manufacturer (e.g. compared to having a slightly bigger NOR, or not having the NOR at all and pre-installing U-Boot on the main storage) =F0=9F=99=81 Anyway, this is clearly getting offtopic. Thanks for the answer. =3D=3D=3D Stefan