From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Schwebel Subject: Re: Getting physical addresses of mmap'd pages from userspace Date: Mon, 13 Oct 2008 18:09:27 +0200 Message-ID: <20081013160927.GC9852@pengutronix.de> References: <200810101815.06249.thomas.cooksey@trolltech.com> <20081010191213.GC9852@pengutronix.de> <200810130833.26399.thomas.cooksey@trolltech.com> <20081013070017.GH9852@pengutronix.de> <48F34400.4000404@billgatliff.com> <20081013132303.GU9852@pengutronix.de> <20081013155820.GE2556@mvista.com> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <20081013155820.GE2556@mvista.com> Sender: linux-embedded-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "George G. Davis" Cc: Bill Gatliff , Tom Cooksey , linux-embedded mailing list , Denis Olvier Kropp On Mon, Oct 13, 2008 at 11:58:20AM -0400, George G. Davis wrote: > It comes down to decisions of bill-of-materials and performance, the > MBX/SGX options mentioned already are part of the SoCs and have high > bandwidth connections to the processor. External options increase cost > and won't match bandwidth of on chip options, but that's just my > ignorant opinion w/o looking at the low-level detail comparisons. > Unless you intend to encourage the SoC vendors to use the SM50x > instead? : ) Of course, that won't help for the current and planned > generation(s) of devices... The BoM argument is probably true for high volume consumer or automotive use cases. For industrial usage, long term maintainability and thus availability of documentation and code is usually a more important argument. Just my 0.02 ct. I'm just a poor open source guy :) rsc -- Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Hannoversche Str. 2, 31134 Hildesheim, Germany Phone: +49-5121-206917-0 | Fax: +49-5121-206917-9