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Diffstat (limited to 'util/lxbios/cmos_lowlevel.h')
| -rw-r--r-- | util/lxbios/cmos_lowlevel.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/util/lxbios/cmos_lowlevel.h b/util/lxbios/cmos_lowlevel.h new file mode 100644 index 0000000000..ccc28dc589 --- /dev/null +++ b/util/lxbios/cmos_lowlevel.h @@ -0,0 +1,62 @@ +/*****************************************************************************\ + * cmos_lowlevel.h + * $Id: cmos_lowlevel.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $ + ***************************************************************************** + * 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 LinuxBIOS + * parameters and displaying information from the LinuxBIOS table. + * For details, see <http://www.llnl.gov/linux/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 */ |