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