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=-10.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 10BEDC2D0DC for ; Thu, 2 Jan 2020 11:11:33 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CE57B2085B for ; Thu, 2 Jan 2020 11:11:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CE57B2085B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=vivier.eu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:39748 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1imyO4-00008i-0v for qemu-devel@archiver.kernel.org; Thu, 02 Jan 2020 06:11:32 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:42330) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1imyNS-000846-QB for qemu-devel@nongnu.org; Thu, 02 Jan 2020 06:10:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1imyNR-00008T-J9 for qemu-devel@nongnu.org; Thu, 02 Jan 2020 06:10:54 -0500 Received: from mout.kundenserver.de ([212.227.17.10]:33387) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1imyNR-0008VV-AE for qemu-devel@nongnu.org; Thu, 02 Jan 2020 06:10:53 -0500 Received: from [192.168.100.1] ([78.238.229.36]) by mrelayeu.kundenserver.de (mreue109 [213.165.67.119]) with ESMTPSA (Nemesis) id 1Mz9d7-1jiFel3Vcx-00wAgk; Thu, 02 Jan 2020 12:10:48 +0100 Subject: Re: [PATCH] q800: implement mac rom reset function for BIOS-less mode To: "Jason A. Donenfeld" , qemu-devel@nongnu.org References: <20200102103644.233370-1-Jason@zx2c4.com> From: Laurent Vivier Autocrypt: addr=laurent@vivier.eu; prefer-encrypt=mutual; keydata= mQINBFYFJhkBEAC2me7w2+RizYOKZM+vZCx69GTewOwqzHrrHSG07MUAxJ6AY29/+HYf6EY2 WoeuLWDmXE7A3oJoIsRecD6BXHTb0OYS20lS608anr3B0xn5g0BX7es9Mw+hV/pL+63EOCVm SUVTEQwbGQN62guOKnJJJfphbbv82glIC/Ei4Ky8BwZkUuXd7d5NFJKC9/GDrbWdj75cDNQx UZ9XXbXEKY9MHX83Uy7JFoiFDMOVHn55HnncflUncO0zDzY7CxFeQFwYRbsCXOUL9yBtqLer Ky8/yjBskIlNrp0uQSt9LMoMsdSjYLYhvk1StsNPg74+s4u0Q6z45+l8RAsgLw5OLtTa+ePM JyS7OIGNYxAX6eZk1+91a6tnqfyPcMbduxyBaYXn94HUG162BeuyBkbNoIDkB7pCByed1A7q q9/FbuTDwgVGVLYthYSfTtN0Y60OgNkWCMtFwKxRaXt1WFA5ceqinN/XkgA+vf2Ch72zBkJL RBIhfOPFv5f2Hkkj0MvsUXpOWaOjatiu0fpPo6Hw14UEpywke1zN4NKubApQOlNKZZC4hu6/ 8pv2t4HRi7s0K88jQYBRPObjrN5+owtI51xMaYzvPitHQ2053LmgsOdN9EKOqZeHAYG2SmRW LOxYWKX14YkZI5j/TXfKlTpwSMvXho+efN4kgFvFmP6WT+tPnwARAQABtCJMYXVyZW50IFZp dmllciA8bGF1cmVudEB2aXZpZXIuZXU+iQI4BBMBAgAiBQJWBTDeAhsDBgsJCAcDAgYVCAIJ CgsEFgIDAQIeAQIXgAAKCRDzDDi9Py++PCEdD/oD8LD5UWxhQrMQCsUgLlXCSM7sxGLkwmmF ozqSSljEGRhffxZvO35wMFcdX9Z0QOabVoFTKrT04YmvbjsErh/dP5zeM/4EhUByeOS7s6Yl HubMXVQTkak9Wa9Eq6irYC6L41QNzz/oTwNEqL1weV1+XC3TNnht9B76lIaELyrJvRfgsp9M rE+PzGPo5h7QHWdL/Cmu8yOtPLa8Y6l/ywEJ040IoiAUfzRoaJs2csMXf0eU6gVBhCJ4bs91 jtWTXhkzdl4tdV+NOwj3j0ukPy+RjqeL2Ej+bomnPTOW8nAZ32dapmu7Fj7VApuQO/BSIHyO NkowMMjB46yohEepJaJZkcgseaus0x960c4ua/SUm/Nm6vioRsxyUmWd2nG0m089pp8LPopq WfAk1l4GciiMepp1Cxn7cnn1kmG6fhzedXZ/8FzsKjvx/aVeZwoEmucA42uGJ3Vk9TiVdZes lqMITkHqDIpHjC79xzlWkXOsDbA2UY/P18AtgJEZQPXbcrRBtdSifCuXdDfHvI+3exIdTpvj BfbgZAar8x+lcsQBugvktlQWPfAXZu4Shobi3/mDYMEDOE92dnNRD2ChNXg2IuvAL4OW40wh gXlkHC1ZgToNGoYVvGcZFug1NI+vCeCFchX+L3bXyLMg3rAfWMFPAZLzn42plIDMsBs+x2yP +bkCDQRWBSYZARAAvFJBFuX9A6eayxUPFaEczlMbGXugs0mazbOYGlyaWsiyfyc3PStHLFPj rSTaeJpPCjBJErwpZUN4BbpkBpaJiMuVO6egrC8Xy8/cnJakHPR2JPEvmj7Gm/L9DphTcE15 92rxXLesWzGBbuYxKsj8LEnrrvLyi3kNW6B5LY3Id+ZmU8YTQ2zLuGV5tLiWKKxc6s3eMXNq wrJTCzdVd6ThXrmUfAHbcFXOycUyf9vD+s+WKpcZzCXwKgm7x1LKsJx3UhuzT8ier1L363RW ZaJBZ9CTPiu8R5NCSn9V+BnrP3wlFbtLqXp6imGhazT9nJF86b5BVKpF8Vl3F0/Y+UZ4gUwL d9cmDKBcmQU/JaRUSWvvolNu1IewZZu3rFSVgcpdaj7F/1aC0t5vLdx9KQRyEAKvEOtCmP4m 38kU/6r33t3JuTJnkigda4+Sfu5kYGsogeYG6dNyjX5wpK5GJIJikEhdkwcLM+BUOOTi+I9u tX03BGSZo7FW/J7S9y0l5a8nooDs2gBRGmUgYKqQJHCDQyYut+hmcr+BGpUn9/pp2FTWijrP inb/Pc96YDQLQA1q2AeAFv3Rx3XoBTGl0RCY4KZ02c0kX/dm3eKfMX40XMegzlXCrqtzUk+N 8LeipEsnOoAQcEONAWWo1HcgUIgCjhJhBEF0AcELOQzitbJGG5UAEQEAAYkCHwQYAQIACQUC VgUmGQIbDAAKCRDzDDi9Py++PCD3D/9VCtydWDdOyMTJvEMRQGbx0GacqpydMEWbE3kUW0ha US5jz5gyJZHKR3wuf1En/3z+CEAEfP1M3xNGjZvpaKZXrgWaVWfXtGLoWAVTfE231NMQKGoB w2Dzx5ivIqxikXB6AanBSVpRpoaHWb06tPNxDL6SVV9lZpUn03DSR6gZEZvyPheNWkvz7bE6 FcqszV/PNvwm0C5Ju7NlJA8PBAQjkIorGnvN/vonbVh5GsRbhYPOc/JVwNNr63P76rZL8Gk/ hb3xtcIEi5CCzab45+URG/lzc6OV2nTj9Lg0SNcRhFZ2ILE3txrmI+aXmAu26+EkxLLfqCVT ohb2SffQha5KgGlOSBXustQSGH0yzzZVZb+HZPEvx6d/HjQ+t9sO1bCpEgPdZjyMuuMp9N1H ctbwGdQM2Qb5zgXO+8ZSzwC+6rHHIdtcB8PH2j+Nd88dVGYlWFKZ36ELeZxD7iJflsE8E8yg OpKgu3nD0ahBDqANU/ZmNNarBJEwvM2vfusmNnWm3QMIwxNuJghRyuFfx694Im1js0ZY3LEU JGSHFG4ZynA+ZFUPA6Xf0wHeJOxGKCGIyeKORsteIqgnkINW9fnKJw2pgk8qHkwVc3Vu+wGS ZiJK0xFusPQehjWTHn9WjMG1zvQ5TQQHxau/2FkP45+nRPco6vVFQe8JmgtRF8WFJA== Message-ID: <60efe91c-af82-f6d7-36c5-c603971c2f33@vivier.eu> Date: Thu, 2 Jan 2020 12:10:47 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.1 MIME-Version: 1.0 In-Reply-To: <20200102103644.233370-1-Jason@zx2c4.com> Content-Type: text/plain; charset=utf-8 Content-Language: fr Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:QOlbt+QuUTeKELcDEx0bE5Zu1nwzjfdi+d4nUHykZmvKDkhR5PL +mP/R3s+nrTcT2nNnP/S7+BNT2UuiMc+dgdjLasf4gaIIqm+WxEm2n4ahDsKsRovM7Pqmtn A2+qozdd1ZQ5isYXtsYlBEVLXqphqRmG/S9PlWuM1vky+qpExnt7IWZu7xJWy0WJb4a4xJk FkFajRHww2P52iph8lpbw== X-UI-Out-Filterresults: notjunk:1;V03:K0:4eV7oRqaQ5A=:dD/l/bmJDE9L5BhG8fPRqz 1bsRbjbi55qFwPkXaBDhn3RkRvuBi7AoaTtip41S7gl8nNmTMlcNyp5Qbzrlsuy82YFFFz09D SpLfQ79LlGWDJy5iqqL2tIWTaGTieaOJHPzVbvxJf/4vRSmula8umdfdbVS4BUfokIYX+L/hO ujR/yZCYgD2/7WMhsOXpSCHqBf/uE+H722U9N+UmNbw+B88SznzsLJVllgrgcQS/gmaWRviXK ZQkVotRFDRYsJBQviDbyZI1AWk0Vix1U8WY16owqj7dZzy0vg7hbxzyIDD4X9Uz5/nDEt+Umd JZKVmelR68SyIiemOEXDacejl0+u/MgBI/Hfl9syu4qBki7BUkJ5ipdL7V3o7DzHU70cE/EGk rkk2eqkL3a4pw721NKE+A8rtjtoFeLIsxqGMGziSO2SwrdEQcWr7txbsOOI8qHeswq4ZJGxwm eG7hj5401AgpE7lSXUikfx4pSXFlLabXjYQKQU7Uj2EhvLi5CMQfK8qEyb7frCMJsyVC5Xzi6 6e+nYbQ6Kr5gkLTe5uGBA0/ZTrJyoYeUeGB+d66z2/HjsE1PP+O105Xb5O7qS+gsN8gBKuTrT hyQQEwlaOREbPRcTtOok6csYIYYZaCwlFBdPpN9wm1HMSm1pkiylOG2Ynqu5D5sOkfLx/Fej9 WtAAgVsNbf8LVtoYQRc6x80iAn3I8YLs/oou85aIOMT/PiK+2p5qPJbegG046y2PkKgAPjxNT VmiuXQQKidYWGGBfWb4amP8LscsH950cXJZNgkbyodAYxoe3iz65snJUENxIFE+du8cAzA5ig IazHxJh3ieDSbZ87+6WrGpL9MtSb1ee/wScIc5rgTe6IPmRATGiWfoOSa/D+nYanRNwfaLY8w Gn1gLEUfPtNE92NpVGpagygUXLVav8Cs5vIk2X1Kc= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 212.227.17.10 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Le 02/01/2020 à 11:36, Jason A. Donenfeld a écrit : > On Linux, calling `reboot(RB_AUTOBOOT);` will result in > arch/m68k/mac/misc.c's mac_reset function being called. That in turn > looks at the rombase (or uses 0x40800000 is there's no rombase), adds > 0xa, and jumps to that address. At the moment, there's nothing there, so > the kernel just crashes when trying to reboot. So, this commit adds a > very simple implementation at that location, which just writes to via2 > to power down. > > Signed-off-by: Jason A. Donenfeld > --- There are two cleaners solution to do that: 1- catch the jump to the ROM address in QEMU and shutdown the machine, see https://github.com/vivier/qemu-m68k/commit/51cd57d1128059819038b9800455fbf794430c15 2- or as you do, write a fake ROM but use the VIA2 port B bit 3 to shutdown the machine see hw/misc/mac_via.c mos6522_q800_via2_portB_write(). Thanks, Laurent