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diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h
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+/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
+/******************************************************************************
+ *
+ * Name: acconfig.h - Global configuration constants
+ *
+ * Copyright (C) 2000 - 2020, Intel Corp.
+ *
+ *****************************************************************************/
+
+#ifndef _ACCONFIG_H
+#define _ACCONFIG_H
+
+/******************************************************************************
+ *
+ * Configuration options
+ *
+ *****************************************************************************/
+
+/*
+ * ACPI_DEBUG_OUTPUT - This switch enables all the debug facilities of the
+ * ACPI subsystem. This includes the DEBUG_PRINT output
+ * statements. When disabled, all DEBUG_PRINT
+ * statements are compiled out.
+ *
+ * ACPI_APPLICATION - Use this switch if the subsystem is going to be run
+ * at the application level.
+ *
+ */
+
+/*
+ * OS name, used for the _OS object. The _OS object is essentially obsolete,
+ * but there is a large base of ASL/AML code in existing machines that check
+ * for the string below. The use of this string usually guarantees that
+ * the ASL will execute down the most tested code path. Also, there is some
+ * code that will not execute the _OSI method unless _OS matches the string
+ * below. Therefore, change this string at your own risk.
+ */
+#define ACPI_OS_NAME "Microsoft Windows NT"
+
+/* Maximum objects in the various object caches */
+
+#define ACPI_MAX_STATE_CACHE_DEPTH 96 /* State objects */
+#define ACPI_MAX_PARSE_CACHE_DEPTH 96 /* Parse tree objects */
+#define ACPI_MAX_EXTPARSE_CACHE_DEPTH 96 /* Parse tree objects */
+#define ACPI_MAX_OBJECT_CACHE_DEPTH 96 /* Interpreter operand objects */
+#define ACPI_MAX_NAMESPACE_CACHE_DEPTH 96 /* Namespace objects */
+#define ACPI_MAX_COMMENT_CACHE_DEPTH 96 /* Comments for the -ca option */
+
+/*
+ * Should the subsystem abort the loading of an ACPI table if the
+ * table checksum is incorrect?
+ */
+#ifndef ACPI_CHECKSUM_ABORT
+#define ACPI_CHECKSUM_ABORT FALSE
+#endif
+
+/*
+ * Generate a version of ACPICA that only supports "reduced hardware"
+ * platforms (as defined in ACPI 5.0). Set to TRUE to generate a specialized
+ * version of ACPICA that ONLY supports the ACPI 5.0 "reduced hardware"
+ * model. In other words, no ACPI hardware is supported.
+ *
+ * If TRUE, this means no support for the following:
+ * PM Event and Control registers
+ * SCI interrupt (and handler)
+ * Fixed Events
+ * General Purpose Events (GPEs)
+ * Global Lock
+ * ACPI PM timer
+ * FACS table (Waking vectors and Global Lock)
+ */
+#ifndef ACPI_REDUCED_HARDWARE
+#define ACPI_REDUCED_HARDWARE FALSE
+#endif
+
+/******************************************************************************
+ *
+ * Subsystem Constants
+ *
+ *****************************************************************************/
+
+/* Version of ACPI supported */
+
+#define ACPI_CA_SUPPORT_LEVEL 5
+
+/* Maximum count for a semaphore object */
+
+#define ACPI_MAX_SEMAPHORE_COUNT 256
+
+/* Maximum object reference count (detects object deletion issues) */
+
+#define ACPI_MAX_REFERENCE_COUNT 0x4000
+
+/* Default page size for use in mapping memory for operation regions */
+
+#define ACPI_DEFAULT_PAGE_SIZE 4096 /* Must be power of 2 */
+
+/* owner_id tracking. 128 entries allows for 4095 owner_ids */
+
+#define ACPI_NUM_OWNERID_MASKS 128
+
+/* Size of the root table array is increased by this increment */
+
+#define ACPI_ROOT_TABLE_SIZE_INCREMENT 4
+
+/* Maximum sleep allowed via Sleep() operator */
+
+#define ACPI_MAX_SLEEP 2000 /* 2000 millisec == two seconds */
+
+/* Address Range lists are per-space_id (Memory and I/O only) */
+
+#define ACPI_ADDRESS_RANGE_MAX 2
+
+/* Maximum time (default 30s) of While() loops before abort */
+
+#define ACPI_MAX_LOOP_TIMEOUT 30
+
+/******************************************************************************
+ *
+ * ACPI Specification constants (Do not change unless the specification changes)
+ *
+ *****************************************************************************/
+
+/* Method info (in WALK_STATE), containing local variables and arguments */
+
+#define ACPI_METHOD_NUM_LOCALS 8
+#define ACPI_METHOD_MAX_LOCAL 7
+
+#define ACPI_METHOD_NUM_ARGS 7
+#define ACPI_METHOD_MAX_ARG 6
+
+/*
+ * Operand Stack (in WALK_STATE), Must be large enough to contain METHOD_MAX_ARG
+ */
+#define ACPI_OBJ_NUM_OPERANDS 8
+#define ACPI_OBJ_MAX_OPERAND 7
+
+/* Number of elements in the Result Stack frame, can be an arbitrary value */
+
+#define ACPI_RESULTS_FRAME_OBJ_NUM 8
+
+/*
+ * Maximal number of elements the Result Stack can contain,
+ * it may be an arbitrary value not exceeding the types of
+ * result_size and result_count (now u8).
+ */
+#define ACPI_RESULTS_OBJ_NUM_MAX 255
+
+/* Constants used in searching for the RSDP in low memory */
+
+#define ACPI_EBDA_PTR_LOCATION 0x0000040E /* Physical Address */
+#define ACPI_EBDA_PTR_LENGTH 2
+#define ACPI_EBDA_WINDOW_SIZE 1024
+#define ACPI_HI_RSDP_WINDOW_BASE 0x000E0000 /* Physical Address */
+#define ACPI_HI_RSDP_WINDOW_SIZE 0x00020000
+#define ACPI_RSDP_SCAN_STEP 16
+
+/* Operation regions */
+
+#define ACPI_USER_REGION_BEGIN 0x80
+
+/* Maximum space_ids for Operation Regions */
+
+#define ACPI_MAX_ADDRESS_SPACE 255
+#define ACPI_NUM_DEFAULT_SPACES 4
+
+/* Array sizes. Used for range checking also */
+
+#define ACPI_MAX_MATCH_OPCODE 5
+
+/* RSDP checksums */
+
+#define ACPI_RSDP_CHECKSUM_LENGTH 20
+#define ACPI_RSDP_XCHECKSUM_LENGTH 36
+
+/*
+ * SMBus, GSBus and IPMI buffer sizes. All have a 2-byte header,
+ * containing both Status and Length.
+ */
+#define ACPI_SERIAL_HEADER_SIZE 2 /* Common for below. Status and Length fields */
+
+#define ACPI_SMBUS_DATA_SIZE 32
+#define ACPI_SMBUS_BUFFER_SIZE ACPI_SERIAL_HEADER_SIZE + ACPI_SMBUS_DATA_SIZE
+
+#define ACPI_IPMI_DATA_SIZE 64
+#define ACPI_IPMI_BUFFER_SIZE ACPI_SERIAL_HEADER_SIZE + ACPI_IPMI_DATA_SIZE
+
+#define ACPI_MAX_GSBUS_DATA_SIZE 255
+#define ACPI_MAX_GSBUS_BUFFER_SIZE ACPI_SERIAL_HEADER_SIZE + ACPI_MAX_GSBUS_DATA_SIZE
+
+/* _sx_d and _sx_w control methods */
+
+#define ACPI_NUM_sx_d_METHODS 4
+#define ACPI_NUM_sx_w_METHODS 5
+
+/******************************************************************************
+ *
+ * Miscellaneous constants
+ *
+ *****************************************************************************/
+
+/* UUID constants */
+
+#define UUID_BUFFER_LENGTH 16 /* Length of UUID in memory */
+#define UUID_STRING_LENGTH 36 /* Total length of a UUID string */
+
+/* Positions for required hyphens (dashes) in UUID strings */
+
+#define UUID_HYPHEN1_OFFSET 8
+#define UUID_HYPHEN2_OFFSET 13
+#define UUID_HYPHEN3_OFFSET 18
+#define UUID_HYPHEN4_OFFSET 23
+
+/******************************************************************************
+ *
+ * ACPI AML Debugger
+ *
+ *****************************************************************************/
+
+#define ACPI_DEBUGGER_MAX_ARGS ACPI_METHOD_NUM_ARGS + 4 /* Max command line arguments */
+#define ACPI_DB_LINE_BUFFER_SIZE 512
+
+#define ACPI_DEBUGGER_COMMAND_PROMPT '-'
+#define ACPI_DEBUGGER_EXECUTE_PROMPT '%'
+
+#endif /* _ACCONFIG_H */