real mode limit

[Anton Blanchard]

> It doesn't.  Do do it "right", we need to detect how big the RMO region
> is and allocate it within min(RMO size, partition size, 4G).
>
> Anyone know how to get the RMO size? It'd be nice if it were a OF variable...

The safe thing here is to always allocate it in the first 256MB, since
we will want that for DLPAR.

PS Milton also reminded me that we need to make sure the region does not
cross a segment boundary.

Anton

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