Reserving a fixed physical address page of RAM.

["Jon Ringle" <JRingle@vertical.com>]

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.

Thanks,

Jon