util/lxbios/layout.h

/*****************************************************************************\
 * layout.h
 * $Id: layout.h,v 1.2 2006/01/24 00:25:40 dsp_llnl Exp $
 *****************************************************************************
 *  Copyright (C) 2002-2005 The Regents of the University of California.
 *  Produced at the Lawrence Livermore National Laboratory.
 *  Written by Dave 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_LAYOUT_H
#define LXBIOS_LAYOUT_H

#include "common.h"
#include "linuxbios_tables.h"

#define LAYOUT_ENTRY_OVERLAP (LAYOUT_RESULT_START + 0)
#define LAYOUT_ENTRY_BAD_LENGTH (LAYOUT_RESULT_START + 1)
#define LAYOUT_DUPLICATE_ENUM (LAYOUT_RESULT_START + 2)
#define LAYOUT_SUMMED_AREA_START_NOT_ALIGNED (LAYOUT_RESULT_START + 3)
#define LAYOUT_SUMMED_AREA_END_NOT_ALIGNED (LAYOUT_RESULT_START + 4)
#define LAYOUT_CHECKSUM_LOCATION_NOT_ALIGNED (LAYOUT_RESULT_START + 5)
#define LAYOUT_INVALID_SUMMED_AREA (LAYOUT_RESULT_START + 6)
#define LAYOUT_CHECKSUM_OVERLAPS_SUMMED_AREA (LAYOUT_RESULT_START + 7)
#define LAYOUT_SUMMED_AREA_OUT_OF_RANGE (LAYOUT_RESULT_START + 8)
#define LAYOUT_CHECKSUM_LOCATION_OUT_OF_RANGE (LAYOUT_RESULT_START + 9)

typedef enum
 { CMOS_ENTRY_ENUM,
   CMOS_ENTRY_HEX,
   CMOS_ENTRY_RESERVED
 }
cmos_entry_config_t;

/* This represents a CMOS parameter. */
typedef struct
 { unsigned bit;
   unsigned length;
   cmos_entry_config_t config;
   unsigned config_id;
   char name[CMOS_MAX_NAME_LENGTH];
 }
cmos_entry_t;

/* This represents a possible value for a CMOS parameter of type
 * CMOS_ENTRY_ENUM.
 */
typedef struct
 { unsigned config_id;
   unsigned long long value;
   char text[CMOS_MAX_TEXT_LENGTH];
 }
cmos_enum_t;

/* This represents the location of the CMOS checksum and the area over which
 * it is computed.  Depending on the context, the values may be represented as
 * either bit positions or byte positions.
 */
typedef struct
 { unsigned summed_area_start;  /* first checksummed location */
   unsigned summed_area_end;  /* last checksummed location */
   unsigned checksum_at;  /* location of checksum */
 }
cmos_checksum_layout_t;

extern const char checksum_param_name[];

extern unsigned cmos_checksum_start;

extern unsigned cmos_checksum_end;

extern unsigned cmos_checksum_index;

typedef void (*cmos_layout_get_fn_t) (void);

void register_cmos_layout_get_fn (cmos_layout_get_fn_t fn);
void get_cmos_layout (void);
int add_cmos_entry (const cmos_entry_t *e, const cmos_entry_t **conflict);
const cmos_entry_t * find_cmos_entry (const char name[]);
const cmos_entry_t * first_cmos_entry (void);
const cmos_entry_t * next_cmos_entry (const cmos_entry_t *last);
int add_cmos_enum (const cmos_enum_t *e);
const cmos_enum_t * find_cmos_enum (unsigned config_id,
                                    unsigned long long value);
const cmos_enum_t * first_cmos_enum (void);
const cmos_enum_t * next_cmos_enum (const cmos_enum_t *last);
const cmos_enum_t * first_cmos_enum_id (unsigned config_id);
const cmos_enum_t * next_cmos_enum_id (const cmos_enum_t *last);
int is_checksum_name (const char name[]);
int checksum_layout_to_bytes (cmos_checksum_layout_t *layout);
void checksum_layout_to_bits (cmos_checksum_layout_t *layout);

#endif  /* LXBIOS_LAYOUT_H */