Re: [PATCH] fix ppc ioremap prototype

David S. Miller
2003-09-04T14:22:41Z

On Thu, 4 Sep 2003 07:15:35 -0700
Matt Porter <mporter@kernel.crashing.org> wrote:

> The global space method doesn't allow for proper resource management
> in systems with a small floating physical address window but a huge
> bus address space to be accessed. MPC8245's DAC scheme is a good
> example of this as well as numerous Xscale PCI implementations.
> Paul's suggestion would allow the removal of lots of ugly hacks.

There is nothing that cannot be represented with a big integer.
Encode the "window" in the upper bits, or whatever, get creative.