From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 9 Aug 2001 14:06:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 9 Aug 2001 14:06:39 -0400 Received: from smtp6.mindspring.com ([207.69.200.110]:25388 "EHLO smtp6.mindspring.com") by vger.kernel.org with ESMTP id ; Thu, 9 Aug 2001 14:06:33 -0400 Date: Thu, 9 Aug 2001 13:06:41 -0500 From: Tim Walberg To: linux-kernel@vger.kernel.org, hpa@zytor.com Subject: Re: Setting up MTRRs for 4096MB RAM Message-ID: <20010809130641.B10425@mindspring.com> Reply-To: Tim Walberg Mail-Followup-To: Tim Walberg , linux-kernel@vger.kernel.org, hpa@zytor.com In-Reply-To: <9kuils$q67$1@cesium.transmeta.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="WfZ7S8PLGjBY9Voh" Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <9kuils$q67$1@cesium.transmeta.com> from H. Peter Anvin on 08/09/2001 12:53 X-PGP-RSA-Key: 0x0C8BA2FD at www.pgp.com (pgp.ai.mit.edu) X-PGP-RSA-Fingerprint: FC08 4026 8A62 C72F 90A9 FA33 6EEA 542D X-PGP-DSS-Key: 0x6DAB2566 at www.pgp.com (pgp.ai.mit.edu) X-PGP-DSS-Fingerprint: 4E1B CD33 46D0 F383 1579 1CCA C3E5 9C8F 6DAB 2566 X-URL: http://www.concentric.net/~twalberg Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --WfZ7S8PLGjBY9Voh Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 08/09/2001 10:53 -0700, H. Peter Anvin wrote: >>=09 >> Intel MTRRs have to be a multiple of 2, so you'd need 2 MTRRs if you >> wanted to cover 3 GB. 0x80000000 is a multiple of 2; 0xC0000000 >> isn't, and 0xFFFFFFFF definitely isn't, although 0x100000000 is. Since when? Seems to me bit 0 of 0xC0000000 is 0, therefore it is a multiple of two. Perhaps you meant "power of 2" (i.e. only one bit set in the binary representation)? tw --=20 twalberg@mindspring.com --WfZ7S8PLGjBY9Voh Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: PGP 6.5.1i iQA/AwUBO3LRL8PlnI9tqyVmEQLd2gCff1lmpJPLwEgsmVUkAGjuEr8VGa4AoJo3 2dZ8eg+uXY+Jer/5wkWudlGj =s/4K -----END PGP SIGNATURE----- --WfZ7S8PLGjBY9Voh--