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 63B8DC433DB for ; Mon, 11 Jan 2021 10:38:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B7762073C for ; Mon, 11 Jan 2021 10:38:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729192AbhAKKiB (ORCPT ); Mon, 11 Jan 2021 05:38:01 -0500 Received: from mail.kernel.org ([198.145.29.99]:50140 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728893AbhAKKiA (ORCPT ); Mon, 11 Jan 2021 05:38:00 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 08F0F227C3 for ; Mon, 11 Jan 2021 10:37:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1610361440; bh=6G1vQMI+RmWGO2MiYs0O6CIsNyH049vZiLMXcbGgM0k=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=hIlWQ/FbzusvJSGGnVwi5q0D2RlFhd3JCMABDXSraP4Js0gXjyYc/4PUWsxNIi5q5 WXJ7KrlgUFl6ikHNjXu9nfK7jgpmePhgzJGUkGFOchuobBUJCydyoe+j1rvBluRrE9 D9I5zncDeIZJ9OwfYejpLKwxeiTs+s9f8Ar0cX3R6NbefeinG1CgLOQYmAKw0n+Z38 1Ru3c+8v9v+ja5aF6Vz43AI8i4UlRhYIgO6MsSp59p2lrudEz6JQTub+BpLO4k96Eo O7F9mjGXXmWxvTP3fchqdByyd8kfBUbpvR6Jk5XbLaYRae8aZGlCVEgogquDjl4Na4 syVezvqqKhPng== Received: by mail-ot1-f42.google.com with SMTP id a109so16463199otc.1 for ; Mon, 11 Jan 2021 02:37:19 -0800 (PST) X-Gm-Message-State: AOAM531jFQuTSOk0Jx7FLLwpDJqoN7Tw5ZnnuD8ircy8i+pMk7NT3oqQ dYku6E7AmYHSF1SPQPgHhDmRmcZcGH4CL0dJRTc= X-Google-Smtp-Source: ABdhPJzGHzTR0OnFdne+o46XOLbCPwtNJ3cY1fffePw33Cn3MIFminQKAXPx0wxtxd5CMEPTB/TujMA2BwR+xucqSOQ= X-Received: by 2002:a9d:7a4b:: with SMTP id z11mr10526720otm.305.1610361439166; Mon, 11 Jan 2021 02:37:19 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Arnd Bergmann Date: Mon, 11 Jan 2021 11:37:02 +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 11:28 AM Geert Uytterhoeven wrote: > > > 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. > > Upon closer look, all TX49xx are 64-bit, but the VxWorks boot loader > refuses to boot 64-bit kernels ("Size is incorrect"), hence I settled > for a 32-bit kernel config a long time ago. Ah, that makes sense. > Probably I need to write a 32-bit bootwrapper first. which would allow > me to upgrade the Debian userland beyond jessie using mips64el? No, I don't think it would help you here, as Debian Stretch requires either MIPS32r2 or MIPS64r2 processors, so neither MIPS-II nor MIPS-III work any more. Not sure what others are running on their pre-r2 hardware these days. Arnd