memdisk/acpi.h

   1 /*
   2  * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
   3  * This file derived almost in its entirety from gPXE.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 /** @file
  21  *
  22  * ACPI data structures
  23  *
  24  */
  25
  26 #include <stdint.h>
  27
  28 /**
  29  * An ACPI description header
  30  *
  31  * This is the structure common to the start of all ACPI system
  32  * description tables.
  33  */
  34 MEMDISK_PACKED_PREFIX
  35 struct acpi_description_header {
  36         /** ACPI signature (4 ASCII characters) */
  37         char signature[4];
  38         /** Length of table, in bytes, including header */
  39         uint32_t length;
  40         /** ACPI Specification minor version number */
  41         uint8_t revision;
  42         /** To make sum of entire table == 0 */
  43         uint8_t checksum;
  44         /** OEM identification */
  45         char oem_id[6];
  46         /** OEM table identification */
  47         char oem_table_id[8];
  48         /** OEM revision number */
  49         uint32_t oem_revision;
  50         /** ASL compiler vendor ID */
  51         char asl_compiler_id[4];
  52         /** ASL compiler revision number */
  53         uint32_t asl_compiler_revision;
  54 } MEMDISK_PACKED_POSTFIX;
  55