---
name: "upa"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/upa"
---

# upa(4)

SPARC64 Host/UPA bridge

## NAME

**upa** – SPARC64 Host/UPA bridge

## SYNOPSIS

**upa\* at mainbus0** **creator\* at upa0**

## DESCRIPTION

The **upa** device provides support for the **upa** bus on sparc64 systems, most often found on UltraSPARC III based systems.

## SEE ALSO

[creator(4)](/creator/4.md), [intro(4)](/intro/4.md)

## HISTORY

OpenBSD support for the **upa** first appeared in OpenBSD 3.2.