src/include/gpxe/acpi.h

   1 #ifndef _GPXE_ACPI_H
   2 #define _GPXE_ACPI_H
   3
   4 /** @file
   5  *
   6  * ACPI data structures
   7  *
   8  */
   9
  10 #include <stdint.h>
  11
  12 /**
  13  * An ACPI description header
  14  *
  15  * This is the structure common to the start of all ACPI system
  16  * description tables.
  17  */
  18 struct acpi_description_header {
  19         /** ACPI signature (4 ASCII characters) */
  20         char signature[4];
  21         /** Length of table, in bytes, including header */
  22         uint32_t length;
  23         /** ACPI Specification minor version number */
  24         uint8_t revision;
  25         /** To make sum of entire table == 0 */
  26         uint8_t checksum;
  27         /** OEM identification */
  28         char oem_id[6];
  29         /** OEM table identification */
  30         char oem_table_id[8];
  31         /** OEM revision number */
  32         uint32_t oem_revision;
  33         /** ASL compiler vendor ID */
  34         char asl_compiler_id[4];
  35         /** ASL compiler revision number */
  36         uint32_t asl_compiler_revision;
  37 } __attribute__ (( packed ));
  38
  39 extern void acpi_fix_checksum ( struct acpi_description_header *acpi );
  40
  41 #endif /* _GPXE_ACPI_H */