From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=68.232.149.214; helo=esa4.dell-outbound.iphmx.com; envelope-from=mohammadyounaskhan.p@dell.com; receiver=edk2-devel@lists.01.org Received: from esa4.dell-outbound.iphmx.com (esa4.dell-outbound.iphmx.com [68.232.149.214]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 45603210D853E for ; Mon, 13 Aug 2018 20:48:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=dell.com; i=@dell.com; q=dns/txt; s=smtpout; t=1534218503; x=1565754503; h=from:to:subject:date:message-id:references:in-reply-to: mime-version; bh=YzvfEN5TKdf17xPPhbA5XQ3LDVuJsI5o7J5JexOOi28=; b=suoMs+jt+ntUcOrHmjudzeyO7pBIO2FqFHhU5kLq1+ybfV+dkrL/BflB Ulex1MBgJb2X/QGW9/o0bOwgs0nZj4bPVBtEaLZyNehD0kRIZWUfcy9V1 MO0p/b3k9izH6hCdGUQcq3j11G1mHQJKcJYxum2y7NXh1NuvCwuMVMrJu k=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A2GvAgDOUHJbhyWd50NcHQEBBQELAYJ?= =?us-ascii?q?XgVt/MoxNnkyHJAsshEACg2s3FQECAQECAQECAQECEAEBAQoLCQgpL4I1IoJ?= =?us-ascii?q?iAgEDEhtcAgEIRk0BBgMBAQQbGoMAAYEdYwGiW4lXAQEBghuKWYsrgRKDEoV?= =?us-ascii?q?LhQkCkjSIKwcCgRqOM45BkmwCBAIEBQIUgVeBdXCDOoIhEQmOF4IFinwBgRo?= =?us-ascii?q?BAQ?= X-IPAS-Result: =?us-ascii?q?A2GvAgDOUHJbhyWd50NcHQEBBQELAYJXgVt/MoxNnkyHJ?= =?us-ascii?q?AsshEACg2s3FQECAQECAQECAQECEAEBAQoLCQgpL4I1IoJiAgEDEhtcAgEIR?= =?us-ascii?q?k0BBgMBAQQbGoMAAYEdYwGiW4lXAQEBghuKWYsrgRKDEoVLhQkCkjSIKwcCg?= =?us-ascii?q?RqOM45BkmwCBAIEBQIUgVeBdXCDOoIhEQmOF4IFinwBgRoBAQ?= Received: from mx0b-00154901.pphosted.com (HELO mx0a-00154901.pphosted.com) ([67.231.157.37]) by esa4.dell-outbound.iphmx.com with ESMTP/TLS/AES256-SHA256; 13 Aug 2018 22:47:58 -0500 Received: from pps.filterd (m0089484.ppops.net [127.0.0.1]) by mx0b-00154901.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w7E3gXnE044264 for ; Mon, 13 Aug 2018 23:47:58 -0400 Received: from esa6.dell-outbound2.iphmx.com (esa6.dell-outbound2.iphmx.com [68.232.154.99]) by mx0b-00154901.pphosted.com with ESMTP id 2ku8gymmhg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Mon, 13 Aug 2018 23:47:57 -0400 From: Received: from ausxipps310.us.dell.com ([143.166.148.211]) by esa6.dell-outbound2.iphmx.com with ESMTP/TLS/DHE-RSA-AES256-SHA256; 14 Aug 2018 09:47:47 +0600 X-LoopCount0: from 10.166.137.68 X-IronPort-AV: E=Sophos;i="5.53,236,1531803600"; d="scan'208,217";a="224732255" To: Thread-Topic: Question regarding CMOS regions. Thread-Index: AdQwbXw0bU09G6E1SGqYwJK+xDH0yQCldFkAAABUloAAHxeNsA== Date: Tue, 14 Aug 2018 03:47:25 +0000 Message-ID: <2d9aeae9d4c94b2c9c1f63161b94c9f5@BLRX13MDC420.AMER.DELL.COM> References: <1b14d8bcb83c4db48a7f4b72f8b8dff6@BLRX13MDC420.AMER.DELL.COM> In-Reply-To: Accept-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [163.244.186.30] MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-08-14_01:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=670 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808140036 X-Content-Filtered-By: Mailman/MimeDel 2.1.27 Subject: FW: Question regarding CMOS regions. X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Aug 2018 03:48:23 -0000 Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi All, As we know CMOS data can be 128 or 256 bytes. CMOS lower 128 bytes are stor= ed in IO ports 0x70-0x71 whereas CMOS upper 128 bytes are stored using IO p= orts 0x72-0x73. 1. How to know that the system has 128bytes of CMOS or 256 bytes of CMOS= region? 2. Is there any CMOS location which represents CMOS upper region is exis= ts or valid or any other mechanism for it? 3. Are we replicating lower 128 bytes to upper 128 bytes in CMOS locatio= n 0x70-0x71 (or 0x72-0x73)? If yes, Why are we doing that? Thank you, Younas.