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=-3.8 required=3.0 tests=BAYES_00, 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 1EAA8C43381 for ; Mon, 11 Jan 2021 09:17:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E4E0F2063A for ; Mon, 11 Jan 2021 09:17:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728419AbhAKJRK (ORCPT ); Mon, 11 Jan 2021 04:17:10 -0500 Received: from mail-ot1-f54.google.com ([209.85.210.54]:42495 "EHLO mail-ot1-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727839AbhAKJRJ (ORCPT ); Mon, 11 Jan 2021 04:17:09 -0500 Received: by mail-ot1-f54.google.com with SMTP id 11so16237434oty.9 for ; Mon, 11 Jan 2021 01:16:54 -0800 (PST) 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=qbLH4yGYqbtLKF6oBWytPMqudqDk3RPsz1g1dGPkH40=; b=FBTSO5D4B0wmpksbvRx5eZaRYY3eqZrvW5VvvfUes4isgjNqbw9Q5ohwRfLqyUag59 kptNXCjG1F1+rGO4tV+KTGgeuYkIte7X2G4tyZ+U9HVgdsh7paDChvu0sl6jKCXN4vuk udAuSGA6VdYvvWJcd3tzf2+jK3M2dh/mRwgh1nDgvJI2wHI7RL5Koo/axy0ncO7Nur6G xa7gZpxXgp0ZQx1D3YWSmcEQk3DGq+pU+uLCCJgNvCTXhwATLO5WKB3A135BGgVj5aM2 tQ1bHUMcYNxAK00o/YlQ0uGjgd6WYdMXpHSBtlOFjLpmXcPVlMwjIVd40A/nVdaoTLeD 5Rgg== X-Gm-Message-State: AOAM531dHWFcLItHhWrqT2MF52dpcgOP04lJGo1t2llX4m4+EV70R2io 7W2fE/BeXtPzVhiNwinsN+D56jIglQYLaXIcmM8= X-Google-Smtp-Source: ABdhPJzJsjUbVcVpKewqdTIkdfgOGgN0UhmT48yM4kHOx2SafgEcdazp3jzXue/PMKiIAM40oihXbdDthTVlgdbZORk= X-Received: by 2002:a05:6830:210a:: with SMTP id i10mr10429218otc.145.1610356588773; Mon, 11 Jan 2021 01:16:28 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Geert Uytterhoeven Date: Mon, 11 Jan 2021 10:16:17 +0100 Message-ID: Subject: Re: Old platforms: bring out your dead To: Arnd Bergmann Cc: 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 , Linus Walleij , 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 Hi Arnd, On Mon, Jan 11, 2021 at 9:59 AM Arnd Bergmann wrote: > On Mon, Jan 11, 2021 at 9:19 AM Geert Uytterhoeven wrote: > > On Fri, Jan 8, 2021 at 11:55 PM Arnd Bergmann wrote: > > > * MIPS R3000/TX39xx: 32-bit MIPS-II generation, mostly superseded by > > > 64-bit MIPS-III (R4000 and higher) starting in 1991. arch/mips still > > > supports these in DECstation and Toshiba Txx9, but it appears that most > > > of those machines are of the 64-bit kind. Later MIPS32 such as 4Kc and > > > later are rather different and widely used. > > > > I have a (32-bit) RBTX4927 development board in my board farm, boot-test > > every bi-weekly renesas-drivers release on it, and fix kernel issues > > when they appear. > > Right, I was specifically thinking of the MIPS-II/R3000 ones here, I know > there are users on multiple actively maintained MIPS-III platforms. > > Regarding 32-bit vs 64-bit kernels, can you clarify what makes this one > a 32-bit board? Is this just your preference for which kernel you install, > or are there dependencies on firmware or hardware that require running > this machine in 32-bit mode? TX492x is 32-bit (/proc/cpuinfo says mips1/mips2/mips3), TX493x is 64-bit. As Debian dropped support for mips3 and older, I'm stuck at a Jessie nfsroot. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds