ASTRO(4) | Device Drivers Manual (hppa) | ASTRO(4)

# 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), runway(4)

# HISTORY

The `astro` driver first appeared in OpenBSD 4.2.

May 31, 2007 | Debian