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 X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 716C7C433E0 for ; Wed, 13 Jan 2021 12:03:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 35677233FA for ; Wed, 13 Jan 2021 12:03:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726811AbhAMMDQ (ORCPT ); Wed, 13 Jan 2021 07:03:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726599AbhAMMDP (ORCPT ); Wed, 13 Jan 2021 07:03:15 -0500 Received: from mail-lj1-x22b.google.com (mail-lj1-x22b.google.com [IPv6:2a00:1450:4864:20::22b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E888EC061795 for ; Wed, 13 Jan 2021 04:02:34 -0800 (PST) Received: by mail-lj1-x22b.google.com with SMTP id m10so2260862lji.1 for ; Wed, 13 Jan 2021 04:02:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=biav/OGJ1AqNN5vKT9LXYu4evCRBaP34li8Uk403On8=; b=ZdkvNIknLKDpptiFDCF6ktEBbv8J8NBGZIkml0bBmGrhzRLdLI7+wTOvo8GzZA9d2/ EnC031LhCbDK+RVvdDs8RQfH2h05l6saC/U5y5QAYnGp3WM3lnfcyyBSlMHpUk1y9CqW gEd6AJrzhHSOiwPzUieAqfS68/6RwQnnD4RIf5HTEidr5SUOaph6ynhLkUMk5ssf7T4x Dfm2RZOXEeydnwoX8nnrW0sEobdhb0kRVljBMlp0x+nDZOODsF4xMQalNb/2d/VNtx79 BWkl3bv81pj+V6peVoyxYdvM/UnnOqykOe7/csWr8pFwu/+Wi9vwRBC5m9UdilM8iFQD mPJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=biav/OGJ1AqNN5vKT9LXYu4evCRBaP34li8Uk403On8=; b=FpJM2yTLCR/SorfC5Pc168xcnVxAD0hwkFpig1x7kujcjqNLmfR9Rw4tXJNfjF9msk NFGGJwhNHG8qSAdE4mhzymSE+AhqMKnfNGze7M2O9fLcbeOa2iaDeOYYZWeprD7Dl7X0 qCR03foDhPmwfDBvJ2KmwhRxxvJmiPHCEKDrbWgp8ZuzbTdRO5cHLi12HZwgcSv8XmP5 52tD19eIN27ZitBTvx+Jq/q79H5+vKGeij3hUmYaoAPnVBqcZe+ncVXNGd3lXd4Bf122 hJLzZy9vZHRAlhfLlTeUxQlOkkl4eq5Lj8nTXMvV9as3lHI/QtdPSP0GG57zvgqOjKuA /G5A== X-Gm-Message-State: AOAM532wcjECwM1JILDIcMHBHu8GzKjJTmOvpy0SawWy2gbMzPPV3sLf i2CWtmfKlkxmZuWHyuMGvKj7Uj9DAXnGzZ6aMUo5IA== X-Google-Smtp-Source: ABdhPJz2BTpLqXN69JXGylCi0jLqdXwjPBhLWpbeKJ7f6zCyyNYn5LX9wIyjGExoNYGWfwIiP2h+ipLEVy94WBL5Ij0= X-Received: by 2002:a2e:3503:: with SMTP id z3mr866790ljz.74.1610539353417; Wed, 13 Jan 2021 04:02:33 -0800 (PST) MIME-Version: 1.0 References: <20210109055645.GA2009@1wt.eu> <6fb7e3f5035d44fab9801001f1811b59@AcuMS.aculab.com> In-Reply-To: From: Linus Walleij Date: Wed, 13 Jan 2021 13:02:20 +0100 Message-ID: Subject: Re: Old platforms: bring out your dead To: Andy Shevchenko , William Breathitt Gray Cc: David Laight , Arnd Bergmann , Willy Tarreau , Linux ARM , Linux Kernel Mailing List , Krzysztof Adamski , Oleksij Rempel , Baruch Siach , Russell King - ARM Linux , Daniel Tang , =?UTF-8?Q?Uwe_Kleine=2DK=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 Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 13, 2021 at 11:27 AM Andy Shevchenko wrote: > On Mon, Jan 11, 2021 at 11:55 AM David Laight wrote: > > 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. What is the status of PC/104? https://en.wikipedia.org/wiki/PC/104 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? Paging William, I think he work on these daily. Yours, Linus Walleij