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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>
- #include <ipxe/uaccess.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 ) )
-
- /** Root System Description Pointer signature */
- #define RSDP_SIGNATURE { 'R', 'S', 'D', ' ', 'P', 'T', 'R', ' ' }
-
- /** Root System Description Pointer */
- struct acpi_rsdp {
- /** Signature */
- char signature[8];
- /** To make sum of entire table == 0 */
- uint8_t checksum;
- /** OEM identification */
- char oem_id[6];
- /** Revision */
- uint8_t revision;
- /** Physical address of RSDT */
- uint32_t rsdt;
- } __attribute__ (( packed ));
-
- /** EBDA RSDP length */
- #define RSDP_EBDA_LEN 0x400
-
- /** Fixed BIOS area RSDP start address */
- #define RSDP_BIOS_START 0xe0000
-
- /** Fixed BIOS area RSDP length */
- #define RSDP_BIOS_LEN 0x20000
-
- /** Stride at which to search for RSDP */
- #define RSDP_STRIDE 16
-
- /** Root System Description Table (RSDT) signature */
- #define RSDT_SIGNATURE ACPI_SIGNATURE ( 'R', 'S', 'D', 'T' )
-
- /** ACPI Root System Description Table (RSDT) */
- struct acpi_rsdt {
- /** ACPI header */
- struct acpi_description_header acpi;
- /** ACPI table entries */
- uint32_t entry[0];
- } __attribute__ (( packed ));
-
- /** Fixed ACPI Description Table (FADT) signature */
- #define FADT_SIGNATURE ACPI_SIGNATURE ( 'F', 'A', 'C', 'P' )
-
- /** Fixed ACPI Description Table (FADT) */
- struct acpi_fadt {
- /** ACPI header */
- struct acpi_description_header acpi;
- /** Physical address of FACS */
- uint32_t facs;
- /** Physical address of DSDT */
- uint32_t dsdt;
- /** Unused by iPXE */
- uint8_t unused[20];
- /** PM1a Control Register Block */
- uint32_t pm1a_cnt_blk;
- /** PM1b Control Register Block */
- uint32_t pm1b_cnt_blk;
- } __attribute__ (( packed ));
-
- /** ACPI PM1 Control Register (within PM1a_CNT_BLK or PM1A_CNT_BLK) */
- #define ACPI_PM1_CNT 0
- #define ACPI_PM1_CNT_SLP_TYP(x) ( (x) << 10 ) /**< Sleep type */
- #define ACPI_PM1_CNT_SLP_EN ( 1 << 13 ) /**< Sleep enable */
-
- /** Differentiated System Description Table (DSDT) signature */
- #define DSDT_SIGNATURE ACPI_SIGNATURE ( 'D', 'S', 'D', 'T' )
-
- /** Secondary System Description Table (SSDT) signature */
- #define SSDT_SIGNATURE ACPI_SIGNATURE ( 'S', 'S', 'D', 'T' )
-
- 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 );
- extern userptr_t acpi_find_rsdt ( userptr_t ebda );
- extern userptr_t acpi_find ( userptr_t rsdt, uint32_t signature,
- unsigned int index );
- extern int acpi_sx ( userptr_t rsdt, uint32_t signature );
-
- #endif /* _IPXE_ACPI_H */
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