GCU(4)                    OpenBSD Programmer's Manual                   GCU(4)

NAME
     gcu - Intel EP80579 Global Configuration Unit

SYNOPSIS
     gcu* at pci?

DESCRIPTION
     The gcu driver provides access to the miibus that is hidden behind the
     GCU device.  It is used to control PHYs on embedded designs utilizing In-
     tel's EP80579 chips.

     The GCU also provides access to CAN, SSP and TDM signal strength drivers,
     but since they are not supported by OpenBSD the driver does not provide
     any functionality related to them.

SEE ALSO
     em(4), intro(4), netintro(4), pci(4)

     Intel's EP80579 Datasheet:
     http://download.intel.com/design/intarch/ep80579/320066.pdf

HISTORY
     The gcu driver first appeared in OpenBSD 4.7.

AUTHORS
     The gcu driver was written by Dariusz Swiderski <dms@openbsd.org>, par-
     tially based on the FreeBSD driver released by Intel under the ISC li-
     cense.

OpenBSD 4.7                    November 25, 2009                             1
