lkml.org 
[lkml]   [2006]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Reserving a fixed physical address page of RAM.
Jon Ringle wrote:
> Hi,
>
> I need to reserve a page of memory at a specific area of RAM that will
> be used as a "shared memory" with another processor over PCI. How can I
> ensure that the this area of RAM gets reseved so that the Linux's memory
> management (kmalloc() and friends) don't use it?
>
> Some things that I've considered are iotable_init() and ioremap().
> However, I've seen these used for memory mapped IO devices which are
> outside of the RAM memory. Can I use them for reseving RAM too?
>
> I appreciate any advice in this regard.

Sounds to me like dma_alloc_coherent is what you want..

--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-11-28 01:43    [W:0.115 / U:0.192 seconds]
©2003-2011 Jasper Spaans