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[23.128.96.18]) by mx.google.com with ESMTP id l8si871016edt.265.2021.01.13.04.32.24; Wed, 13 Jan 2021 04:32:47 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b="gWIe/OZx"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726406AbhAMMb0 (ORCPT + 99 others); Wed, 13 Jan 2021 07:31:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726003AbhAMMbZ (ORCPT ); Wed, 13 Jan 2021 07:31:25 -0500 Received: from mail-io1-xd2a.google.com (mail-io1-xd2a.google.com [IPv6:2607:f8b0:4864:20::d2a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 264FEC061786 for ; Wed, 13 Jan 2021 04:30:45 -0800 (PST) Received: by mail-io1-xd2a.google.com with SMTP id r9so3646295ioo.7 for ; Wed, 13 Jan 2021 04:30:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=Qy2n0EEDF/FIPv3Pjpgkrjv/e7EmHyQ07JOMBlAK9gc=; b=gWIe/OZx+ut9emsJYi4FUSOeyMRsbSg1TgDmmceyc5HZwcopY6Ze9fXZBLextW/X+D UeCeFrR2FszDUAQiwRKRnrKXs/f0S4oTC3ura65e0NMnX25fYf272bUsmxfy8Hka7vg+ 2Mkx1ro66wsrp7Y8VWsBxkpmfjEaE+fQ6xDhORYvpDe7yO0MDCEO0Xik3ANSvvTcxaRB omxuvkfYbbS3X9irycc2dwvGf6AIDb911TmDHP+EJ0G4FsAE80hxOSSnl9FptW62UFEC jYDpUEo2OJMP+3DQnJmoBx4aNAk6Qskh3xllJn5xm9nKNw2dfq8ES954fBOp4oiA5GdZ i2sw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=Qy2n0EEDF/FIPv3Pjpgkrjv/e7EmHyQ07JOMBlAK9gc=; b=IDkdPOSy9+Iqsgm/FN7SQBNLXyfoL1Z5G28yyCQPeaOEI8hRso50YQciJOHINtG45D dqVc1Mbku+B7ROHrS8O6v3oatTb7nv0W83SxDToI92WwBS8hmEMrcjrsGe76lMcCZipa gQuNPaduu6xePGfw88RLJoA97QiLJS2HmvuO28+Jekqf6K9Lf6vabzuUOV2F15ZRD7jr awXIfLj0OzoQ71Jc3/h4f16desKNJwyHdn5V5QF8c0SnGkmdPAgKGPcSizrYxp83qEii vF+k8bx/M2MCrqWk0VztHhH1C0f9alW2if/DHxEXXAORL/WXRzWMhfmPi/7NadYFgsAu XkKA== X-Gm-Message-State: AOAM530UwLYjyqtldmYEftwelKCnU4D/wWaOti6MUfgnuJLdhIx8QYC5 Vd7AH4t8tbDvVt4yFulthJM= X-Received: by 2002:a6b:db01:: with SMTP id t1mr1546900ioc.10.1610541044564; Wed, 13 Jan 2021 04:30:44 -0800 (PST) Received: from shinobu ([193.27.12.132]) by smtp.gmail.com with ESMTPSA id t17sm1142070ioc.8.2021.01.13.04.30.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jan 2021 04:30:43 -0800 (PST) Date: Wed, 13 Jan 2021 21:30:28 +0900 From: William Breathitt Gray To: Linus Walleij Cc: Andy Shevchenko , David Laight , Arnd Bergmann , Willy Tarreau , Linux ARM , Linux Kernel Mailing List , Krzysztof Adamski , Oleksij Rempel , Baruch Siach , Russell King - ARM Linux , Daniel Tang , Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= , Jamie Iles , Barry Song , Viresh Kumar , Jonas Jensen , Marc Gonzalez , Hartley Sweeten , Lubomir Rintel , Neil Armstrong , Shawn Guo , Alex Elder , Alexander Shiyan , Koen Vandeputte , Hans Ulli Kroll , Vladimir Zapolskiy , Wei Xu , Steven Rostedt , Yoshinori Sato , Mark Salter , Michael Ellerman , Geert Uytterhoeven , Thomas Bogendoerfer Subject: Re: Old platforms: bring out your dead Message-ID: References: <20210109055645.GA2009@1wt.eu> <6fb7e3f5035d44fab9801001f1811b59@AcuMS.aculab.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="UmhiVe9cN4Tq8lpv" Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --UmhiVe9cN4Tq8lpv Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jan 13, 2021 at 01:02:20PM +0100, Linus Walleij wrote: > On Wed, Jan 13, 2021 at 11:27 AM Andy Shevchenko > wrote: > > On Mon, Jan 11, 2021 at 11:55 AM David Laight = wrote: >=20 > > > basically 486 but have a few extra instructions - probably just cpuid > > > and (IIRC) rdtsc. > > > Designed for low power embedded use they won't ever have been suitable > > > for a desktop - but are probably fast enough for some uses. > > > I'm not sure how much keeping 486 support actually costs, 386 was a > > > PITA - but the 486 fixed most of those issues. > > > > Right, we have "last of mohicans" (to date) Intel Quark family of CPUs > > (486 core + few i586 features). > > This is for the embedded world and probably not for powerful use. >=20 > What is the status of PC/104? > https://en.wikipedia.org/wiki/PC/104 >=20 > I have three GPIO drivers for PC/104 machines and these are for > embedded industrial usecases. I am curious about what CPUs these > beasts run on in practice? Are they getting upgraded? >=20 > Paging William, I think he work on these daily. >=20 > Yours, > Linus Walleij I don't really see pure PC/104 systems around that much anymore, but there are still plenty of PC/104-Plus and PCI-104 setups in production. The PC/104 form factor is popular because users can stack PC/104 compatible modules easily together to build custom solutions; see for example the diagram on this page: https://www.advantech.com/embedded-boards-design-in-services/embedded-singl= e-board-computers/pc104-and-pc104-plus As far as the CPU is concerned, these systems are typically for industrial applications and run CPUs geared for low-power consumption -- you're looking at processor series such as the Intel Bay trail (https://www.winsystems.com/product/epx-c414/), DMP Vortex86DX (http://www.diamondsystems.com/products/helios), and AMD G-series (https://www.advantech.com/products/1-2jkltu/pcm-3356/mod_0706f4d5-2e44-473= a-a7b7-53bd1a7bd1a0). TLDR; PC/104 is certainly a niche market focused on industrial consumers, but the form factor and devices are still popular and upgraded reguarly. William Breathitt Gray --UmhiVe9cN4Tq8lpv Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEk5I4PDJ2w1cDf/bghvpINdm7VJIFAl/+58sACgkQhvpINdm7 VJI8BRAArRPORTMYpY/tyUB0frIrCrrKW42Iu8h+qE4a9snxWF+5V6Iul58auY9e AQXFU1TUYcFHKcNglXb5YzGJ8zoafXl7RPAE7DKIcPIzIS8MAh3+rEXvRFdTcJ2s KE9bwo0+uBg3qu3YqKccWbTKT7gAKIZmAGKOYGQpxmRGYfiYqXb5Fb0VPD/ColAk b38WMUIBhXAo11DmHuGsGgah1Cz9H4blRU4fmUkw2jyhtGiTYRnTytv0Q76ZV+LY 1zH2eGPsd6RFsKeE3TWJQx6jDZI26DLvPFYmam6R2acNUdYGgH69izmRpAkVa/JJ 3ZIuWVctVUpm58JjjJ9rjekzZAHIOiw9wIRajHV3NCMjNBdJgDqYNVZjRFvF0WCZ s3kMhpxwURkefPUecHkQV7SY0NKZQH9noH44aRw0+M9FDSASwtJLDhOAaMSbgSA+ YCr4DsDe94I5HxpJNIAiBhAKq28NISSAorOlFFbtvDbXuzB4DHBsogiDCv1BbBCV jce3c2eRO/eB1fOgybtozGAizkPu0HloKgpOui0yPwjkowM4v/SZP9CX5T/GgxMA qt3c5y2wr19F1e9GEcjbObPW/hiYFRGkKxUCcQYZpdpsh4chNBJZDGUwvl6pjjtQ uTrqZyRll7sjCFcqE6FnNEOe6G+QL+fwQ5DlVnhVDQC6YiSgX04= =c68M -----END PGP SIGNATURE----- --UmhiVe9cN4Tq8lpv--