From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: Making only part of memory DMA-able [CONFIG_DISCONTIGMEM?] From: Adrian Cox To: Anders Blomdell Cc: linuxppc-embedded@lists.linuxppc.org In-Reply-To: <5E0FB922-2FB1-11D7-9939-0003931C2BFA@control.lth.se> References: <5E0FB922-2FB1-11D7-9939-0003931C2BFA@control.lth.se> Content-Type: text/plain Date: 24 Jan 2003 16:14:43 +0000 Message-Id: <1043424894.782.17.camel@newt> Mime-Version: 1.0 Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: On Fri, 2003-01-24 at 15:34, Anders Blomdell wrote: > Is there anybody working on DISCONTIGOUS memory allocation for PowerPC's, > that could shed some light on what should be done? A lot of memory > management seems to be specialized for CONFIG_440, which further clutters > my vision... I've dealt with a very similar system architecture^(1). The main lesson I learned from this was to always use a non-transparent PCI-PCI bridge. In your case, I presume that this is a fixed system design, and you don't have to make every device driver in the Linux kernel work. You might consider writing a special purpose allocator and modifying the individual drivers you require to use it. (1: http://www.varisys.co.uk/tpe3.html ) -- Adrian Cox http://www.humboldt.co.uk/ ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/