From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Mon, 19 Mar 2007 12:36:57 +0000 (GMT) Received: from h155.mvista.com ([63.81.120.155]:5309 "EHLO imap.sh.mvista.com") by ftp.linux-mips.org with ESMTP id S20021845AbXCSMgw (ORCPT ); Mon, 19 Mar 2007 12:36:52 +0000 Received: from [192.168.1.248] (unknown [10.150.0.9]) by imap.sh.mvista.com (Postfix) with ESMTP id C65063ED1; Mon, 19 Mar 2007 05:36:14 -0700 (PDT) Message-ID: <45FE83B6.3040100@ru.mvista.com> Date: Mon, 19 Mar 2007 15:36:06 +0300 From: Sergei Shtylyov Organization: MontaVista Software Inc. User-Agent: Mozilla/5.0 (X11; U; Linux i686; rv:1.7.2) Gecko/20040803 X-Accept-Language: ru, en-us, en-gb MIME-Version: 1.0 To: Marco Braga Cc: Michael Stickel , linux-mips@linux-mips.org Subject: Re: Au1500 and TI PCI1510 cardbus References: <45FBB9C7.9060800@cubic.org> <45FBF0F1.70302@cubic.org> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 14545 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: sshtylyov@ru.mvista.com Precedence: bulk X-list: linux-mips Marco Braga wrote: >> I am sory, I meant the datasheet of the Au1500. I do not find the >> paragraph anymore, but can tell you more on monday. I think Michael actually mean the specification update, not datasheet. Indeed, errata 32 > Thank you. I've checked the data book but I've not found anything so > explicit. Paragraph 4.3.10 "Other notes" states: > "The Au1500 PCI contoller cannot be used with external PCI-to-PCI bridges > that have PCI bus-mastering devices on the > secondary bus which target the Au1500 memory." > But this is not exactly an explanation.. I've found nothing regarding race > conditions or delayed transactions. I'll wait eagerly for monday when all > the truths will be revealed. :) Hrm, this seems enough of an explanation -- it basically says that you can't use any decent PCI device behind the bridge. The abovementioned errata tells that "any mastering device on the other side of a P2P bridge, where the target is the Au1500 processor, will eventually lead to a lock-up condition of the PCI bus or even the entire system". > Thanks!! WBR, Sergei