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=-6.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 628F4C4332B for ; Mon, 11 Jan 2021 09:00:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23F0F22581 for ; Mon, 11 Jan 2021 09:00:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728246AbhAKJAX (ORCPT ); Mon, 11 Jan 2021 04:00:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:45626 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728191AbhAKJAW (ORCPT ); Mon, 11 Jan 2021 04:00:22 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 27A0922B3A for ; Mon, 11 Jan 2021 08:59:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1610355581; bh=ybK5U+BUdI/pR3b5T1Dl4Bho1Rzl4FeKk+oMZheLGLs=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=oYOGz8iRjB6gT7LGQTIvmjjlbkTVgNFV16Iv5lOpEYl42PTzz/cGZ1PbOkycLN/Fb 3W8WKJOxjej8yhSCS253Osksp+OK8huzmyeKnso3d0OVicTBQu7bX5SkWrnFe2oVqv fTQHAOXrHo9TQNufgcI5GMgjzeU1mFt3eV8oBhnDeaULOxQHsAc8GdWZDUEsdLvfRv Iq62lOcSx3+dAmNEdSJ12ywdjRAV+H85VqFVN7vvN8mMzxfPibnZ9ar6yp9CU/mpXq 49veFvDKWkvp/yhR7/XSvnCL2MAX6iQV9oGYAe3S4ayuaL6Xz4uIx4dlDetmMBFLu0 2Wrt2B72YUl4w== Received: by mail-ot1-f43.google.com with SMTP id 11so16201060oty.9 for ; Mon, 11 Jan 2021 00:59:41 -0800 (PST) X-Gm-Message-State: AOAM533chRoq+TQobOCCypQoaTj521Q5NOAntZVlzVutkX2nMDOMUmWH PVLDm6ahMKxDOhYO2TD/wiMa/m7PvwzUxNlITNo= X-Google-Smtp-Source: ABdhPJyJdWIN/3oMwPmrSVTEmowKiKlaukdf+1svNcF71wYiTOofYL4DsZZY5Q2W6C+ANSD79TxZX+lV9hDtm/8s8lQ= X-Received: by 2002:a05:6830:2413:: with SMTP id j19mr10780215ots.251.1610355580235; Mon, 11 Jan 2021 00:59:40 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Arnd Bergmann Date: Mon, 11 Jan 2021 09:59:23 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: Old platforms: bring out your dead To: Geert Uytterhoeven 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 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? (MIPS is not my area anyway, I'm just curious) Arnd