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Re: REQ64#PROBLEM
- To: navaneeth shivothama ks <navaneeth_2002@rediffmail.com>
- Subject: Re: REQ64#PROBLEM
- From: Neal Palmer <neal@dinigroup.com>
- Date: Mon, 29 Jul 2002 20:04:46 -0700 (PDT)
- cc: dan.weaver@znyx.com, <Andrew.Ingraham@compaq.com>, <markus.kirchmayer@mchr2.siemens.de>, <wtx@umem.com>, <brooks.lame@motorola.com>, <austin@darkroom.com>, <jdc_odi@hotmail.com>, <pci-sig@znyx.com>, <Gord_Wait@spectrumsignal.com>
- In-Reply-To: <20020729120017.11406.qmail@webmail25.rediffmail.com>
- Resent-Date: Mon, 29 Jul 2002 22:41:27 -0700
- Resent-From: pci-sig@znyx.com
- Resent-Message-ID: <nIL5e.A.RCE.VXiR9@electra>
- Resent-Sender: pci-sig-request@znyx.com
Navaneeth,
There are very few motherboard chipsets that will generate a 64-bit
transaction from a processor memory access. Off the top of my head,
I can't name a single one (please somebody chime in and prove me wrong)...
If you want to do 64-bit PCI transactions, then you will need to get a
bus mastering chip to initiate the transactions.
-- Neal
On 29 Jul 2002, navaneeth shivothama ks wrote:
> Dear Sir,
> I am trying for 64 bit PCI transactions. But the problem
> is I am not getting REQ64 asserted and unless I get that I can't
> achieve 64 bit transactions. During reset req64 gets asserted and
> goes back to high and thereafter it never gets asserted. I am
> using MMX MOVQ instructions for data transfer. I am using STL2
> Pentium III motherboard and OS is redhat linux 6.1.
> I referred PCI specs 2.1 and I couldn't find the
> solution.
>
> Can you please help me to come out of the problem.
>
> Thanks a lot.
>
> Navaneetha Shivothama K.S.
>
--
-- Neal Palmer
The Dini Group
1010 Pearl St #6
La Jolla, CA 92037
(858) 454-3419 x16
(858) 454-1728 (Fax)