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     ›€ОТ„ПЯНАХ ?ч     ›/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
/******************************************************************************
 *
 * Name: actbl.h - Basic ACPI Table Definitions
 *
 * Copyright (C) 2000 - 2025, Intel Corp.
 *
 *****************************************************************************/

#ifndef __ACTBL_H__
#define __ACTBL_H__

/*******************************************************************************
 *
 * Fundamental ACPI tables
 *
 * This file contains definitions for the ACPI tables that are directly consumed
 * by ACPICA. All other tables are consumed by the OS-dependent ACPI-related
 * device drivers and other OS support code.
 *
 * The RSDP and FACS do not use the common ACPI table header. All other ACPI
 * tables use the header.
 *
 ******************************************************************************/

/*
 * Values for description table header signatures for tables defined in this
 * file. Useful because they make it more difficult to inadvertently type in
 * the wrong signature.
 */
#define ACPI_SIG_DSDT           "DSDT"	/* Differentiated System Description Table */
#define ACPI_SIG_FADT           "FACP"	/* Fixed ACPI Description Table */
#define ACPI_SIG_FACS           "FACS"	/* Firmware ACPI Control Structure */
#define ACPI_SIG_OSDT           "OSDT"	/* Override System Description Table */
#define ACPI_SIG_PSDT           "PSDT"	/* Persistent System Description Table */
#define ACPI_SIG_RSDP           "RSD PTR "	/* Root System Description Pointer */
#define ACPI_SIG_RSDT           "RSDT"	/* Root System Description Table */
#define ACPI_SIG_XSDT           "XSDT"	/* Extended  System Description Table */
#define ACPI_SIG_SSDT           "SSDT"	/* Secondary System Description Table */
#define ACPI_RSDP_NAME          "RSDP"	/* Short name for RSDP, not signature */
#define ACPI_OEM_NAME           "OEM"	/* Short name for OEM, not signature */

/*
 * All tables and structures must be byte-packed to match the ACPI
 * specification, since the tables are provided by the system BIOS
 */
#pragma pack(1)

/*
 * Note: C bitfields are not used for this reason:
 *
 * "Bitfields are great and easy to read, but unfortunately the C language
 * does not specify the layout of bitfields in memory, which means they are
 * essentially useless for dealing with packed data in on-disk formats or
 * binary wire protocols." (Or ACPI tables and buffers.) "If you ask me,
 * this decision was a design error in C. Ritchie could have picked an order
 * and stuck with it." Norman Ramsey.
 * See http://stackoverflow.com/a/1053662/41661
 */

/*******************************************************************************
 *
 * Master ACPI Table Header. This common header is used by all ACPI tables
 * except the RSDP and FACS.
 *
 ******************************************************************************/

struct acpi_table_header {
	char signature[ACPI_NAMESEG_SIZE];	/* ASCII table signature */
	u32 length;		/* Length of table in bytes, including this header */
	u8 revision;		/* ACPI Specification minor version number */
	u8 checksum;		/* To make sum of entire table == 0 */
	char oem_id[ACPI_OEM_ID_SIZE];	/* ASCII OEM identification */
	char oem_table_id[ACPI_OEM_TABLE_ID_SIZE];	/* ASCII OEM table identification */
	u32 oem_revision;	/* OEM revision number */
	char asl_compiler_id[ACPI_NAMESEG_SIZE];	/* ASCII ASL compiler vendor ID */
	u32 asl_compiler_revision;	/* ASL compiler version */
};

/*******************************************************************************
 *
 * GAS - Generic Address Structure (ACPI 2.0+)
 *
 * Note: Since this structure is used in the ACPI tables, it is byte aligned.
 * If misaligned access is not supported by the hardware, accesses to the
 * 64-bit Address field must be performed with care.
 *
 ******************************************************************************/

struct acpi_generic_address {
	u8 space_id;		/* Address space where struct or register exists */
	u8 bit_width;		/* Size in bits of given register */
	u8 bit_offset;