Re: [PATCH] IP28 support

[Ralf Baechle <ralf@linux-mips.org>]

On Thu, Nov 29, 2007 at 10:58:44AM +0100, Thomas Bogendoerfer wrote:

> I've changed that in the updated IP28 patch. I don't see a way to
> support ISA busmaster devices, because they will generate a physical
> address between 0 and 0x1000000, which will only hit the 512 KB
> mirrored RAM. Anything which uses ISA slave DMA is able to address
> the full 32bit address space.

Those 512kB could be used as a fairly claustrophobic ZONE_DMA.  Not
pretty though.

  Ralf