[OpenBIOS] pgmap

[Blue Swirl]

Hi,

This patch adds pgmap@ and pgmap! functions that NetBSD loader needs.
But the functions are only available at /iommu node. How can I make
them global?

0 > 0 pgmap@ pgmap@: undefined word.
0 > cd /iommu  ok
0 > words pgmap! pgmap@ decode-unit encode-unit close open
 ok
0 > .properties
name                      "iommu"
#address-cells            2
#size-cells               1
page-size                 1000
cache-coherence?          0
address                   ffdae000
reg                       -- c : 0 0 0 0 10 0 0 0 0 0 3 0
 ok
0 > ffdae000 pgmap@ . 100007e  ok