Radeon drivers on PowerPC (e500)

[Benjamin Herrenschmidt]

On Wed, 2014-06-18 at 11:05 +1000, Dave Airlie wrote:
> 
> I don't think we ever ioremap GART, it should kmap GART pages, ioremap
> should only happen for VRAM areas AFAIK,
> 
> This isn't some 32-bit vs 36-bit BAR or something, I seem to remember BenH
> mentioning something like that before.

Yes, it's a recurring problem in the DRM with physical addresses that are
bigger than 32-bit on 32-bit systems. There have been patches done to
fix that but afaik never quite "completed". I can dig internally if
I can put my hand onto something.

If possible at all, can you try to configure your SoC to bring the MMIO
space of the PCIe within the bottom 32-bit of the chip address space ?

(Or use a 64-bit e5500 based chip ? :-)

Cheers,
Ben.