source: bootcd/isolinux/syslinux-6.03/com32/gplinclude/acpi/structs.h

/* ----------------------------------------------------------------------- *
 *
 *   Copyright 2009-2011 Erwan Velu - All Rights Reserved
 *
 *   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, Inc., 53 Temple Place Ste 330,
 *   Boston MA 02111-1307, USA; either version 2 of the License, or
 *   (at your option) any later version; incorporated herein by reference.
 *
 * ----------------------------------------------------------------------- */

#ifndef ACPI_STRUCTS_H
#define ACPI_STRUCTS_H
#include <inttypes.h>
#include <stdbool.h>

/* This value define the real size of the acpi structure 
 * Our is bigger as we manage the \0 of strings
 * */
#define ACPI_HEADER_SIZE 36

enum { GAS_SYSTEM_MEMORY=0, GAS_SYSTEM_IO=1 };

/* Generic Address Structure (GAS) Format */
typedef struct {
    /* address_space_id could be {GAS_SYSTEM_MEMORY | GAS_SYSTEM_IO} */
    uint8_t address_space_id;
    uint8_t register_bit_width;
    uint8_t register_bit_offset;
    uint8_t reserved;
    uint64_t address;
} __attribute__ ((packed)) s_gas;

typedef struct {
    uint8_t signature[4 + 1];
    uint32_t length;
    uint8_t revision;
    uint8_t checksum;
    uint8_t oem_id[6 + 1];
    uint8_t oem_table_id[8 + 1];
    uint32_t oem_revision;
    uint8_t creator_id[4 + 1];
    uint32_t creator_revision;
} s_acpi_description_header;

#endif