From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ovro.ovro.caltech.edu (ovro.ovro.caltech.edu [192.100.16.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "sabrina.ovro.caltech.edu", Issuer "sabrina.ovro.caltech.edu" (not verified)) by ozlabs.org (Postfix) with ESMTP id AADC867B20 for ; Sat, 11 Feb 2006 17:05:47 +1100 (EST) Message-ID: <43ED7E1E.2030700@ovro.caltech.edu> Date: Fri, 10 Feb 2006 22:03:10 -0800 From: David Hawkins MIME-Version: 1.0 To: Wolfgang Denk Subject: Re: Yosemite/440EP 'issues' as a PCI target References: <20060210173133.964B53525CC@atlas.denx.de> In-Reply-To: <20060210173133.964B53525CC@atlas.denx.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi Wolfgang, >>Of course there is also the option of finding another >>PowerPC that matches my requirements; > ... > MPC834x comes to mind. But I have to admit that we never tried using > this as a PCI device yet... Indeed you were correct. The MPC834x series meets my requirements. It is also a 3.3V PCI device, so I'm checking into whether the Trenton CPUs I can use as host CPUs use a 3.3V PCI interface. If that is the case, then I'll move the Force CPUs into another system, and I'll just define the cPCI bus in the correlator system as 3.3V-only. The potential advantages of the MPC834x over the 440EP are; - it has doorbell registers and mailboxes for PCI host-to-host comms (though does not have an I2O interface) - its DDR-SDRAM controller can run faster than the 440EP - its external local bus is wider and faster than the 440EP - but I think the MPC834x internal buses are slower than the 440EP CoreConnect buses, so I'll need to benchmark to compare the two. - it exists! I can find them on distributors web sites (can't say the same for the 440EP yet!) So, I'll continue with my evalation of the 440EP, and then I'll want to evaluate the MPC834x devices. What MPC834x development kit are you using? What would you recommend? - I'd like to get a board in a PCI or cPCI-form factor, since I could use it as a PCI agent/peripheral - I'd really like to get access to the external bus too. Embedded Planet has a PrPMC module with an 8343E, but I doubt I can get to the local bus on that board. I found news releases of an MPC8349E QUICCstart board, but couldn't find anything on Freescale's web site. Wind River appears to have an eval board; SBC8347E/49E, which looks to be a cPCI board, but their web site didn't have much in the way of details (or pictures). Freescale do have the MPC8349EMDS 'MPC8349E Modular Development System', but its not clear how much of that system I would need to purchase just to test the board in a PCI system. Looks like its aimed toward AdvancedTCA development. Anyway, thanks for the pointer to the MPC834x series! Dave