acpi.h

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00001 #ifndef _GPXE_ACPI_H
00002 #define _GPXE_ACPI_H
00003 
00004 /** @file
00005  *
00006  * ACPI data structures
00007  *
00008  */
00009 
00010 FILE_LICENCE ( GPL2_OR_LATER );
00011 
00012 #include <stdint.h>
00013 
00014 /**
00015  * An ACPI description header
00016  *
00017  * This is the structure common to the start of all ACPI system
00018  * description tables.
00019  */
00020 struct acpi_description_header {
00021         /** ACPI signature (4 ASCII characters) */
00022         char signature[4];
00023         /** Length of table, in bytes, including header */
00024         uint32_t length;
00025         /** ACPI Specification minor version number */
00026         uint8_t revision;
00027         /** To make sum of entire table == 0 */
00028         uint8_t checksum;
00029         /** OEM identification */
00030         char oem_id[6];
00031         /** OEM table identification */
00032         char oem_table_id[8];
00033         /** OEM revision number */
00034         uint32_t oem_revision;
00035         /** ASL compiler vendor ID */
00036         char asl_compiler_id[4];
00037         /** ASL compiler revision number */
00038         uint32_t asl_compiler_revision;
00039 } __attribute__ (( packed ));
00040 
00041 extern void acpi_fix_checksum ( struct acpi_description_header *acpi );
00042 
00043 #endif /* _GPXE_ACPI_H */