[ECOS] about MMU on PowerpcFADS8xx

[Gary Thomas]

ylyuan wrote:

> Hi,I don't know why enable MMU and use TLBs to simulate BATs.I think it would
> be faster if not use MMU.
>     Thanks a lot!

In general, we can't don that on the PPC since the MMU is the only way to
control cacheability of regions (in general).  Some platforms may be able to get
around this, but in this case, we've opted for the simpler, general case.