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-.\"
-.\" This file and its contents are supplied under the terms of the
-.\" Common Development and Distribution License ("CDDL"), version 1.0.
-.\" You may only use this file in accordance with the terms of version
-.\" 1.0 of the CDDL.
-.\"
-.\" A full copy of the text of the CDDL should have accompanied this
-.\" source. A copy of the CDDL is also available via the Internet at
-.\" http://www.illumos.org/license/CDDL.
-.\"
-.\"
-.\" Copyright 2021 Oxide Computer Company
-.\"
-.Dd July 30, 2021
-.Dt USMN 7D
-.Os
-.Sh NAME
-.Nm usmn
-.Nd AMD SMN user access driver
-.Sh SYNOPSIS
-.Pa /devices/pseudo/amdzen@0/usmn@2:usmn.*
-.Sh DESCRIPTION
-The
-.Nm
-driver provides the ability to read and write data from the AMD System
-Management Network
-.Pq SMN
-on AMD Family 17h
-.Pq Zen, Zen+, and Zen 2
-and AMD Family 19h
-.Pq Zen 3
-processors.
-.Pp
-This driver is intended strictly for facilitating platform development
-and is not recommended for systems that aren't doing kernel and platform
-development on AMD Zen platforms.
-Arbitrary writes to the SMN can severely damage and destabilize the system.
-If you do not need access to the SMN, then this driver should not be
-present on the system.
-.Sh SEE ALSO
-.Xr amdzen 7D ,
-.Xr zen_udf 7D