Memory and I/O controller
astro* at mainbus?
elroy* at astro?
driver provides support for the Astro
memory and I/O controller used on systems with PA-8500 and later 64-bit CPUs.
It functions as a bridge from the Runway bus to up to 8 I/O ropes that connect
to Elroy chips. Astro contains an IOMMU and provides support for cache
driver first appeared in