| Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame^] | 1 | /*****************************************************************************\ |
| 2 | * cmos_lowlevel.h |
| 3 | * $Id: cmos_lowlevel.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $ |
| 4 | ***************************************************************************** |
| 5 | * Copyright (C) 2002-2005 The Regents of the University of California. |
| 6 | * Produced at the Lawrence Livermore National Laboratory. |
| 7 | * Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>. |
| 8 | * UCRL-CODE-2003-012 |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * This file is part of lxbios, a utility for reading/writing LinuxBIOS |
| 12 | * parameters and displaying information from the LinuxBIOS table. |
| 13 | * For details, see <http://www.llnl.gov/linux/lxbios/>. |
| 14 | * |
| 15 | * Please also read the file DISCLAIMER which is included in this software |
| 16 | * distribution. |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or modify it |
| 19 | * under the terms of the GNU General Public License (as published by the |
| 20 | * Free Software Foundation) version 2, dated June 1991. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, but |
| 23 | * WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and |
| 25 | * conditions of the GNU General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License along |
| 28 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 29 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 30 | \*****************************************************************************/ |
| 31 | |
| 32 | #ifndef LXBIOS_CMOS_LOWLEVEL_H |
| 33 | #define LXBIOS_CMOS_LOWLEVEL_H |
| 34 | |
| 35 | #include "common.h" |
| 36 | |
| 37 | #define CMOS_AREA_OUT_OF_RANGE (CMOS_RESULT_START + 0) |
| 38 | #define CMOS_AREA_OVERLAPS_RTC (CMOS_RESULT_START + 1) |
| 39 | #define CMOS_AREA_TOO_WIDE (CMOS_RESULT_START + 2) |
| 40 | |
| 41 | unsigned long long cmos_read (unsigned bit, unsigned length); |
| 42 | void cmos_write (unsigned bit, unsigned length, unsigned long long value); |
| 43 | unsigned char cmos_read_byte (unsigned index); |
| 44 | void cmos_write_byte (unsigned index, unsigned char value); |
| 45 | void cmos_read_all (unsigned char data[]); |
| 46 | void cmos_write_all (unsigned char data[]); |
| 47 | void set_iopl (int level); |
| 48 | int verify_cmos_op (unsigned bit, unsigned length); |
| 49 | |
| 50 | #define CMOS_SIZE 256 /* size of CMOS memory in bytes */ |
| 51 | #define CMOS_RTC_AREA_SIZE 14 /* first 14 bytes control real time clock */ |
| 52 | |
| 53 | /**************************************************************************** |
| 54 | * verify_cmos_byte_index |
| 55 | * |
| 56 | * Return 1 if 'index' does NOT specify a valid CMOS memory location. Else |
| 57 | * return 0. |
| 58 | ****************************************************************************/ |
| 59 | static inline int verify_cmos_byte_index (unsigned index) |
| 60 | { return (index < CMOS_RTC_AREA_SIZE) || (index >= CMOS_SIZE); } |
| 61 | |
| 62 | #endif /* LXBIOS_CMOS_LOWLEVEL_H */ |