memdisk/acpi.h

/*
 * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
 * This file derived almost in its entirety from gPXE.
 *
 * 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; either version 2 of the
 * License, or any later version.
 *
 * 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/** @file
 *
 * ACPI data structures
 *
 */

#include <stdint.h>

/**
 * An ACPI description header
 *
 * This is the structure common to the start of all ACPI system
 * description tables.
 */
MEMDISK_PACKED_PREFIX
struct acpi_description_header {
	/** ACPI signature (4 ASCII characters) */
	char signature[4];
	/** Length of table, in bytes, including header */
	uint32_t length;
	/** ACPI Specification minor version number */
	uint8_t revision;
	/** To make sum of entire table == 0 */
	uint8_t checksum;
	/** OEM identification */
	char oem_id[6];
	/** OEM table identification */
	char oem_table_id[8];
	/** OEM revision number */
	uint32_t oem_revision;
	/** ASL compiler vendor ID */
	char asl_compiler_id[4];
	/** ASL compiler revision number */
	uint32_t asl_compiler_revision;
} MEMDISK_PACKED_POSTFIX;