2007-07-12 18:35:42 +02:00
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/*****************************************************************************\
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* cmos_lowlevel.h
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* $Id: cmos_lowlevel.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
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*****************************************************************************
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* Copyright (C) 2002-2005 The Regents of the University of California.
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* Produced at the Lawrence Livermore National Laboratory.
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* Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
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* UCRL-CODE-2003-012
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* All rights reserved.
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*
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2008-01-18 16:33:49 +01:00
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* This file is part of lxbios, a utility for reading/writing coreboot
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* parameters and displaying information from the coreboot table.
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2007-07-12 18:35:42 +02:00
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* For details, see <http://www.llnl.gov/linux/lxbios/>.
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*
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* Please also read the file DISCLAIMER which is included in this software
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* distribution.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (as published by the
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* Free Software Foundation) version 2, dated June 1991.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
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* conditions of the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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\*****************************************************************************/
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#ifndef LXBIOS_CMOS_LOWLEVEL_H
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#define LXBIOS_CMOS_LOWLEVEL_H
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#include "common.h"
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#define CMOS_AREA_OUT_OF_RANGE (CMOS_RESULT_START + 0)
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#define CMOS_AREA_OVERLAPS_RTC (CMOS_RESULT_START + 1)
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#define CMOS_AREA_TOO_WIDE (CMOS_RESULT_START + 2)
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unsigned long long cmos_read (unsigned bit, unsigned length);
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void cmos_write (unsigned bit, unsigned length, unsigned long long value);
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unsigned char cmos_read_byte (unsigned index);
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void cmos_write_byte (unsigned index, unsigned char value);
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void cmos_read_all (unsigned char data[]);
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void cmos_write_all (unsigned char data[]);
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void set_iopl (int level);
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int verify_cmos_op (unsigned bit, unsigned length);
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#define CMOS_SIZE 256 /* size of CMOS memory in bytes */
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#define CMOS_RTC_AREA_SIZE 14 /* first 14 bytes control real time clock */
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/****************************************************************************
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* verify_cmos_byte_index
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*
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* Return 1 if 'index' does NOT specify a valid CMOS memory location. Else
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* return 0.
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****************************************************************************/
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static inline int verify_cmos_byte_index (unsigned index)
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{ return (index < CMOS_RTC_AREA_SIZE) || (index >= CMOS_SIZE); }
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#endif /* LXBIOS_CMOS_LOWLEVEL_H */
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