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From:   Linus Walleij <linus.walleij@linaro.org>
Date:   Wed, 13 Jan 2021 13:02:20 +0100
Message-ID: <CACRpkdaH-1s8DnRUPVRSQgqUE99MdWjKGLv_y6iYnXU6p4dwUg@mail.gmail.com>
Subject: Re: Old platforms: bring out your dead
To:     Andy Shevchenko <andy.shevchenko@gmail.com>,
        William Breathitt Gray <vilhelm.gray@gmail.com>
Cc:     David Laight <David.Laight@aculab.com>,
        Arnd Bergmann <arnd@kernel.org>, Willy Tarreau <w@1wt.eu>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Krzysztof Adamski <krzysztof.adamski@nokia.com>,
        Oleksij Rempel <o.rempel@pengutronix.de>,
        Baruch Siach <baruch@tkos.co.il>,
        Russell King - ARM Linux <linux@armlinux.org.uk>,
        Daniel Tang <dt.tangr@gmail.com>,
        =?UTF-8?Q?Uwe_Kleine=2DK=C3=B6nig?= 
        <u.kleine-koenig@pengutronix.de>, Jamie Iles <jamie@jamieiles.com>,
        Barry Song <song.bao.hua@hisilicon.com>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        Jonas Jensen <jonas.jensen@gmail.com>,
        Marc Gonzalez <marc.w.gonzalez@free.fr>,
        Hartley Sweeten <hsweeten@visionengravers.com>,
        Lubomir Rintel <lkundrak@v3.sk>,
        Neil Armstrong <narmstrong@baylibre.com>,
        Shawn Guo <shawnguo@kernel.org>, Alex Elder <elder@linaro.org>,
        Alexander Shiyan <shc_work@mail.ru>,
        Koen Vandeputte <koen.vandeputte@ncentric.com>,
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        Steven Rostedt <rostedt@goodmis.org>,
        Yoshinori Sato <ysato@users.osdn.me>,
        Mark Salter <msalter@redhat.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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On Wed, Jan 13, 2021 at 11:27 AM Andy Shevchenko
<andy.shevchenko@gmail.com> wrote:
> On Mon, Jan 11, 2021 at 11:55 AM David Laight <David.Laight@aculab.com> 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