Access physical memory via mmap() on ppc440epx.

[Leonid]

Hi, Josh:

Thank you for your suggestion. Somehow it didn't work with mmap (may be,
my mistake, I'll double check), however it partially helped me with my
another problem.

I have kernel driver where I need read/write some HW device, connected
on address 0xea000000, chip select 4. This chip select configured
properly, here are EBC registers:

440EPx>rd ebc0_b4cr
ebc0_b4cr: 0xea01a000  -368992256
440EPx>rd ebc0_b4ap
ebc0_b4ap: 0x03037000  50556928