From nobody Sun Feb 8 16:34:08 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1649763788923664.8035439718486; Tue, 12 Apr 2022 04:43:08 -0700 (PDT) Received: from localhost ([::1]:49988 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1neEvL-0004Vi-LW for importer@patchew.org; Tue, 12 Apr 2022 07:43:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60474) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1neEqx-00034Z-9j for qemu-devel@nongnu.org; Tue, 12 Apr 2022 07:38:37 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:32407) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1neEqt-00035h-JL for qemu-devel@nongnu.org; Tue, 12 Apr 2022 07:38:33 -0400 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-189-lz-HTiozPJqzbQLHF_HBOg-1; Tue, 12 Apr 2022 07:38:27 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C84373820F61; Tue, 12 Apr 2022 11:38:26 +0000 (UTC) Received: from thuth.com (dhcp-192-183.str.redhat.com [10.33.192.183]) by smtp.corp.redhat.com (Postfix) with ESMTP id 19EFB2024CCF; Tue, 12 Apr 2022 11:38:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649763510; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=gc1mzdkZsq3HzQEd8C3kVAd70WJNr1x6mPofhyxy8+Q=; b=J0sq/Np1ZRiFEWwj9NJttAjmwXjwtpU3LJVBTj67RsSX1L7Sbzx4vqAX7WfO04Vjw6Ki2H lMFM5fXI3Q7/IV82FMwSiU99sv3b1pGK7gwhOyMQCvC5jttZeNGhv+W+rl6O18V54KUmMQ hZfH8cypkSAYmQ+AdHjPLdXNbOFm9JM= X-MC-Unique: lz-HTiozPJqzbQLHF_HBOg-1 From: Thomas Huth To: qemu-devel@nongnu.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH for-7.1] target/mips: Remove stale TODO file Date: Tue, 12 Apr 2022 13:38:24 +0200 Message-Id: <20220412113824.297108-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=thuth@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-trivial@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1649763789705100001 Content-Type: text/plain; charset="utf-8" The last change to this file has been done in 2012, so it seems like this is not really used anymore, and the content is likely very out of date now. Signed-off-by: Thomas Huth Reviewed-by: Richard Henderson --- target/mips/TODO | 51 ------------------------------------------------ 1 file changed, 51 deletions(-) delete mode 100644 target/mips/TODO diff --git a/target/mips/TODO b/target/mips/TODO deleted file mode 100644 index 1d782d8027..0000000000 --- a/target/mips/TODO +++ /dev/null @@ -1,51 +0,0 @@ -Unsolved issues/bugs in the mips/mipsel backend ------------------------------------------------ - -General -------- -- Unimplemented ASEs: - - MDMX - - SmartMIPS - - microMIPS DSP r1 & r2 encodings -- MT ASE only partially implemented and not functional -- Shadow register support only partially implemented, - lacks set switching on interrupt/exception. -- 34K ITC not implemented. -- A general lack of documentation, especially for technical internals. - Existing documentation is x86-centric. -- Reverse endianness bit not implemented -- The TLB emulation is very inefficient: - QEMU's softmmu implements a x86-style MMU, with separate entries - for read/write/execute, a TLB index which is just a modulo of the - virtual address, and a set of TLBs for each user/kernel/supervisor - MMU mode. - MIPS has a single entry for read/write/execute and only one MMU mode. - But it is fully associative with randomized entry indices, and uses - up to 256 ASID tags as additional matching criterion (which roughly - equates to 256 MMU modes). It also has a global flag which causes - entries to match regardless of ASID. - To cope with these differences, QEMU currently flushes the TLB at - each ASID change. Using the MMU modes to implement ASIDs hinges on - implementing the global bit efficiently. -- save/restore of the CPU state is not implemented (see machine.c). - -MIPS64 ------- -- Userland emulation (both n32 and n64) not functional. - -"Generic" 4Kc system emulation ------------------------------- -- Doesn't correspond to any real hardware. Should be removed some day, - U-Boot is the last remaining user. - -PICA 61 system emulation ------------------------- -- No framebuffer support yet. - -MALTA system emulation ----------------------- -- We fake firmware support instead of doing the real thing -- Real firmware (YAMON) falls over when trying to init RAM, presumably - due to lacking system controller emulation. -- Bonito system controller not implemented -- MSC1 system controller not implemented --=20 2.27.0