/*****************************************************************************\ * cmos_lowlevel.h ***************************************************************************** * 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 nvramtool, a utility for reading/writing coreboot * parameters and displaying information from the coreboot table. * For details, see http://coreboot.org/nvramtool. * * 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. \*****************************************************************************/ #ifndef NVRAMTOOL_CMOS_LOWLEVEL_H #define NVRAMTOOL_CMOS_LOWLEVEL_H #include "common.h" #include "layout.h" typedef struct { void (*init)(void* data); unsigned char (*read)(unsigned addr); void (*write)(unsigned addr, unsigned char value); void (*set_iopl)(int level); } cmos_access_t; typedef enum { HAL_CMOS, HAL_MEMORY } hal_t; void select_hal(hal_t hal, void *data); #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(const cmos_entry_t * e); void cmos_write(const cmos_entry_t * e, 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, cmos_entry_config_t config); #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 /* NVRAMTOOL_CMOS_LOWLEVEL_H */