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- #ifndef _IPXE_ACPI_H
- #define _IPXE_ACPI_H
-
- /** @file
- *
- * ACPI data structures
- *
- */
-
- FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
- #include <stdint.h>
- #include <ipxe/interface.h>
-
- /**
- * An ACPI description header
- *
- * This is the structure common to the start of all ACPI system
- * description tables.
- */
- struct acpi_description_header {
- /** ACPI signature (4 ASCII characters) */
- uint32_t signature;
- /** 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;
- } __attribute__ (( packed ));
-
- /**
- * Build ACPI signature
- *
- * @v a First character of ACPI signature
- * @v b Second character of ACPI signature
- * @v c Third character of ACPI signature
- * @v d Fourth character of ACPI signature
- * @ret signature ACPI signature
- */
- #define ACPI_SIGNATURE( a, b, c, d ) \
- ( ( (a) << 0 ) | ( (b) << 8 ) | ( (c) << 16 ) | ( (d) << 24 ) )
-
- extern int acpi_describe ( struct interface *interface,
- struct acpi_description_header *acpi, size_t len );
- #define acpi_describe_TYPE( object_type ) \
- typeof ( int ( object_type, \
- struct acpi_description_header *acpi, \
- size_t len ) )
-
- extern void acpi_fix_checksum ( struct acpi_description_header *acpi );
-
- #endif /* _IPXE_ACPI_H */
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