1.\" $NetBSD: gem.4,v 1.2 2003/02/14 15:20:18 grant Exp $ 2.\" 3.\" Copyright (c) 2002 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the NetBSD 17.\" Foundation, Inc. and its contributors. 18.\" 4. Neither the name of The NetBSD Foundation nor the names of its 19.\" contributors may be used to endorse or promote products derived 20.\" from this software without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32.\" POSSIBILITY OF SUCH DAMAGE. 33.\" 34.\" $FreeBSD$ 35.\" 36.Dd September 2, 2006 37.Dt GEM 4 38.Os 39.Sh NAME 40.Nm gem 41.Nd ERI/GEM/GMAC Ethernet device driver 42.Sh SYNOPSIS 43To compile this driver into the kernel, 44place the following lines in your 45kernel configuration file: 46.Bd -ragged -offset indent 47.Cd "device miibus" 48.Cd "device gem" 49.Ed 50.Pp 51Alternatively, to load the driver as a 52module at boot time, place the following line in 53.Xr loader.conf 5 : 54.Bd -literal -offset indent 55if_gem_load="YES" 56.Ed 57.Sh DESCRIPTION 58The 59.Nm 60driver provides support for the GMac Ethernet hardware found mostly in 61the last Apple PowerBooks G3s and most G4-based Apple hardware, as 62well as many Sun UltraSPARCs. 63.Sh HARDWARE 64.Pp 65Chips supported by the 66.Nm 67driver include: 68.Pp 69.Bl -bullet -compact 70.It 71Apple GMAC 72.It 73Sun ERI 10/100 Mbps Ethernet 74.It 75Sun GEM Gigabit Ethernet 76.El 77.Sh NOTES 78On sparc64 the 79.Nm 80driver respects the 81.Va local-mac-address? 82system configuration variable which can be set in the Open Firmware boot 83monitor using the 84.Ic setenv 85command or by 86.Xr eeprom 8 . 87If set to 88.Dq Li false 89(the default), the 90.Nm 91driver will use the system's default MAC address for all of its devices. 92If set to 93.Dq Li true , 94the unique MAC address of each interface is used if present rather than 95the system's default MAC address. 96.Pp 97Supported interfaces having their own MAC address include the on-board 98Sun ERI 10/100 Mbps on boards equipped with more than one Ethernet interface 99and the Sun Gigabit Ethernet 2.0/3.0 GBE add-on cards. 100.Sh CAVEATS 101Currently the 102.Nm 103driver fails to attach to Sun Gigabit Ethernet 2.0/3.0 (GBE/P) cards, 104as the SERDES used on these cards is not supported so far. 105The 106.Nm 107driver will also fail to probe and attach to Sun Gigabit Ethernet 2.0/3.0 (GBE/S) cards, 108as no SBus front-end has been written so far. 109.Sh SEE ALSO 110.Xr hme 4 , 111.Xr miibus 4 , 112.Xr netintro 4 , 113.Xr eeprom 8 , 114.Xr ifconfig 8 115.Sh HISTORY 116The 117.Nm 118device driver appeared in 119.Nx 1.6 . 120The first 121.Fx 122version to include it was 123.Fx 5.0 . 124.Sh AUTHORS 125.An -nosplit 126The 127.Nm 128driver was written by 129.An Eduardo Horvath 130.Aq eeh@NetBSD.org . 131The man page was written by 132.An Thomas Klausner 133.Aq wiz@NetBSD.org . 134