Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
GEM(4)                 FreeBSD Kernel Interfaces Manual                 GEM(4)

NAME
     gem -- ERI/GEM/GMAC Ethernet device driver

SYNOPSIS
     To compile this driver into the kernel, place the following lines in your
     kernel configuration file:

           device miibus
           device gem

     Alternatively, to load the driver as a module at boot time, place the
     following line in loader.conf(5):

           if_gem_load="YES"

DESCRIPTION
     The gem driver provides support for the GMac Ethernet hardware found
     mostly in the last Apple PowerBooks G3s and most G4-based Apple hardware,
     as well as many Sun UltraSPARCs.

HARDWARE
     Chips supported by the gem driver include:

     +o   Apple GMAC
     +o   Sun ERI 10/100 Mbps Ethernet
     +o   Sun GEM Gigabit Ethernet

NOTES
     On sparc64 the gem driver respects the local-mac-address? system configu-
     ration variable which can be set in the Open Firmware boot monitor using
     the setenv command or by eeprom(8).  If set to ``false'' (the default),
     the gem driver will use the system's default MAC address for all of its
     devices.  If set to ``true'', the unique MAC address of each interface is
     used if present rather than the system's default MAC address.

     Supported interfaces having their own MAC address include the on-board
     Sun ERI 10/100 Mbps on boards equipped with more than one Ethernet inter-
     face and the Sun Gigabit Ethernet 2.0/3.0 GBE add-on cards.

CAVEATS
     Currently the gem driver fails to attach to Sun Gigabit Ethernet 2.0/3.0
     (GBE/P) cards, as the SERDES used on these cards is not supported so far.
     The gem driver will also fail to probe and attach to Sun Gigabit Ethernet
     2.0/3.0 (GBE/S) cards, as no SBus front-end has been written so far.

SEE ALSO
     hme(4), miibus(4), netintro(4), eeprom(8), ifconfig(8)

HISTORY
     The gem device driver appeared in NetBSD 1.6.  The first FreeBSD version
     to include it was FreeBSD 5.0.

AUTHORS
     The gem driver was written by Eduardo Horvath <eeh@NetBSD.org>.  The man
     page was written by Thomas Klausner <wiz@NetBSD.org>.

FreeBSD 6.2                    September 2, 2006                   FreeBSD 6.2

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | NOTES | CAVEATS | SEE ALSO | HISTORY | AUTHORS

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=gem&sektion=4&manpath=FreeBSD+6.2-RELEASE>

home | help