From owner-freebsd-hackers@FreeBSD.ORG Sat Aug 12 08:42:37 2006 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 49DBD16A4DD for ; Sat, 12 Aug 2006 08:42:37 +0000 (UTC) (envelope-from nike_d@cytexbg.com) Received: from mail.interbgc.com (mx04.interbgc.com [217.9.224.231]) by mx1.FreeBSD.org (Postfix) with SMTP id 0EDE943D49 for ; Sat, 12 Aug 2006 08:42:35 +0000 (GMT) (envelope-from nike_d@cytexbg.com) Received: (qmail 85497 invoked from network); 12 Aug 2006 08:42:34 -0000 Received: from nike_d@cytexbg.com by keeper.interbgc.com by uid 1002 with qmail-scanner-1.14 (uvscan: v4.2.40/v4374. spamassassin: 2.63. Clear:SA:0(0.1/8.0):. Processed in 2.186776 secs); 12 Aug 2006 08:42:34 -0000 X-Spam-Status: No, hits=0.1 required=8.0 Received: from niked.ddns.cablebg.net (HELO tormentor.totalterror.net) (85.130.14.211) by mx04.interbgc.com with SMTP; 12 Aug 2006 08:42:31 -0000 Received: (qmail 15036 invoked from network); 12 Aug 2006 08:42:31 -0000 Received: from unknown (HELO ?10.0.0.3?) (10.0.0.3) by tormentor.totalterror.net with SMTP; 12 Aug 2006 08:42:31 -0000 Message-ID: <44DD9476.7020706@cytexbg.com> Date: Sat, 12 Aug 2006 11:42:30 +0300 From: Niki Denev User-Agent: Thunderbird 1.5.0.5 (Windows/20060719) MIME-Version: 1.0 To: John Baldwin References: <44D4A5DC.7080403@cytexbg.com> <200608071527.50711.jhb@freebsd.org> In-Reply-To: <200608071527.50711.jhb@freebsd.org> X-Enigmail-Version: 0.94.0.0 OpenPGP: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-hackers@freebsd.org Subject: Re: jkh weird problem (reading pci device memory) X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 12 Aug 2006 08:42:37 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 John Baldwin wrote: > On Saturday 05 August 2006 10:06, Niki Denev wrote: >> for(i=0; i < sizeof(config_table_t); i++) { >> r = bus_space_read_1(sc->bar.tag, sc->bar.hdl, i); >> *((u_int8_t *)&sc->cfg_table + i) = r; >> } > > Note that you can replace this with: > > bus_space_read_multi_1(sc->bar.tag, sc->bar.hdl, 0, > (u_int8_t *)&sc->cfg_table, sizeof(config_table_t)); > I can't understand why the code above gives me different results. i.e.: for(i=0; i < sizeof(config_table_t); i++) { *((u_int8_t *)&sc->cfg_table + i) = bus_read_1(sc->res, i); } printf("cfg_table signature : %08X\n", sc->cfg_table.signature); This prints : cfg_table signaature 0xEFEFFEFE, which is the correct signature that should be read from the card. But this code : bus_read_multi_1(sc->res, 0, (u_int8_t *)&sc->cfg_table, sizeof(config_table_t)); printf("cfg_table signature : %08X\n", sc->cfg_table.signature); prints : cfg_table signature 0xFEFEFEFE which is not correct... Shouldn't the above examples do exactly the same thing? - --niki -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFE3ZR2HNAJ/fLbfrkRAlVBAJ42fHV0cQ4uw5SIdUl7TQHaKkBSKQCZAcd6 eCFWNusXoCuqm88OObX+AFw= =J0mZ -----END PGP SIGNATURE-----