NAME

astro — Astro Memory and I/O controller

SYNOPSIS

astro* at mainbus?
elroy* at astro?

DESCRIPTION

The 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 coherent DMA.

SEE ALSO

cpu(4), elroy(4), intro(4)

HISTORY

The astro driver first appeared in OpenBSD 4.2. It was ported to NetBSD 6.0 by Nick Hudson.