AW: Re: __setup_cpu_be problem

[Jimi Xenidis]

On Feb 15, 2006, at 6:30 AM, Paul Mackerras wrote:

> Jimi Xenidis writes:
>
>> Are thinking of using Large PAges in IO space? Cuz I don't think you
>> can.
>
> Why not?

 From the 970 User manual:
   To avoid accidental large/small page translation aliasing, the  
970FX implements a HID4 bit (HID4[61]) to
   disable the large page facility and does not permit cache  
inhibited accesses to an address in a large page.

I'm not 100% but I believe this effects P4, and maybe even P5.
WRT Cell, I believe the BPA_Map can be mapped with large pages but  
I'm not sure about "real" devices.
-JX