$NetBSD: geodecntr.4,v 1.3 2009/05/27 19:24:00 snj Exp $
Copyright (c) 2006 Frank Kardel.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
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1. Redistributions of source code must retain the above copyright
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2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.Dd June 24, 2006 .Dt GEODECNTR 4 .Os .Sh NAME .Nm geodecntr .Nd AMD Geode SC1100 High Resolution Counter .Sh SYNOPSIS .Cd "geodegcb* at pci? dev ? function ?" .Cd "geodecntr* at geodegcb?" .Sh DESCRIPTION The .Nm driver supports the .Tn AMD SC1100 controllers and provides a timecounter implementation for the 27MHz counter.
Copyright (c) 2006 Frank Kardel.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.Dd June 24, 2006 .Dt GEODECNTR 4 .Os .Sh NAME .Nm geodecntr .Nd AMD Geode SC1100 High Resolution Counter .Sh SYNOPSIS .Cd "geodegcb* at pci? dev ? function ?" .Cd "geodecntr* at geodegcb?" .Sh DESCRIPTION The .Nm driver supports the .Tn AMD SC1100 controllers and provides a timecounter implementation for the 27MHz counter.
p The other timing sources in the SC1100 suffer from power management features that prohibit i8254 and TSC from being used for time keeping. This .Nm driver makes the 27MHz counter available for the .Xr timecounter 9 framework. .Sh SEE ALSO .Xr timecounter 9