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1/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
2/******************************************************************************
3 *
4 * Name: acconfig.h - Global configuration constants
5 *
6 * Copyright (C) 2000 - 2026, Intel Corp.
7 *
8 *****************************************************************************/
9
10#ifndef _ACCONFIG_H
11#define _ACCONFIG_H
12
13/******************************************************************************
14 *
15 * Configuration options
16 *
17 *****************************************************************************/
18
19/*
20 * ACPI_DEBUG_OUTPUT - This switch enables all the debug facilities of the
21 * ACPI subsystem. This includes the DEBUG_PRINT output
22 * statements. When disabled, all DEBUG_PRINT
23 * statements are compiled out.
24 *
25 * ACPI_APPLICATION - Use this switch if the subsystem is going to be run
26 * at the application level.
27 *
28 */
29
30/*
31 * OS name, used for the _OS object. The _OS object is essentially obsolete,
32 * but there is a large base of ASL/AML code in existing machines that check
33 * for the string below. The use of this string usually guarantees that
34 * the ASL will execute down the most tested code path. Also, there is some
35 * code that will not execute the _OSI method unless _OS matches the string
36 * below. Therefore, change this string at your own risk.
37 */
38#define ACPI_OS_NAME "Microsoft Windows NT"
39
40/* Maximum objects in the various object caches */
41
42#define ACPI_MAX_STATE_CACHE_DEPTH 96 /* State objects */
43#define ACPI_MAX_PARSE_CACHE_DEPTH 96 /* Parse tree objects */
44#define ACPI_MAX_EXTPARSE_CACHE_DEPTH 96 /* Parse tree objects */
45#define ACPI_MAX_OBJECT_CACHE_DEPTH 96 /* Interpreter operand objects */
46#define ACPI_MAX_NAMESPACE_CACHE_DEPTH 96 /* Namespace objects */
47#define ACPI_MAX_COMMENT_CACHE_DEPTH 96 /* Comments for the -ca option */
48
49/*
50 * Should the subsystem abort the loading of an ACPI table if the
51 * table checksum is incorrect?
52 */
53#ifndef ACPI_CHECKSUM_ABORT
54#define ACPI_CHECKSUM_ABORT FALSE
55#endif
56
57/*
58 * Generate a version of ACPICA that only supports "reduced hardware"
59 * platforms (as defined in ACPI 5.0). Set to TRUE to generate a specialized
60 * version of ACPICA that ONLY supports the ACPI 5.0 "reduced hardware"
61 * model. In other words, no ACPI hardware is supported.
62 *
63 * If TRUE, this means no support for the following:
64 * PM Event and Control registers
65 * SCI interrupt (and handler)
66 * Fixed Events
67 * General Purpose Events (GPEs)
68 * Global Lock
69 * ACPI PM timer
70 */
71#ifndef ACPI_REDUCED_HARDWARE
72#define ACPI_REDUCED_HARDWARE FALSE
73#endif
74
75/******************************************************************************
76 *
77 * Subsystem Constants
78 *
79 *****************************************************************************/
80
81/* Version of ACPI supported */
82
83#define ACPI_CA_SUPPORT_LEVEL 5
84
85/* Maximum count for a semaphore object */
86
87#define ACPI_MAX_SEMAPHORE_COUNT 256
88
89/* Maximum object reference count (detects object deletion issues) */
90
91#define ACPI_MAX_REFERENCE_COUNT 0x4000
92
93/* Default page size for use in mapping memory for operation regions */
94
95#define ACPI_DEFAULT_PAGE_SIZE 4096 /* Must be power of 2 */
96
97/* owner_id tracking. 128 entries allows for 4095 owner_ids */
98
99#define ACPI_NUM_OWNERID_MASKS 128
100
101/* Size of the root table array is increased by this increment */
102
103#define ACPI_ROOT_TABLE_SIZE_INCREMENT 4
104
105/* Maximum sleep allowed via Sleep() operator */
106
107#define ACPI_MAX_SLEEP 2000 /* 2000 millisec == two seconds */
108
109/* Address Range lists are per-space_id (Memory and I/O only) */
110
111#define ACPI_ADDRESS_RANGE_MAX 2
112
113/* Maximum time (default 30s) of While() loops before abort */
114
115#define ACPI_MAX_LOOP_TIMEOUT 30
116
117/******************************************************************************
118 *
119 * ACPI Specification constants (Do not change unless the specification changes)
120 *
121 *****************************************************************************/
122
123/* Method info (in WALK_STATE), containing local variables and arguments */
124
125#define ACPI_METHOD_NUM_LOCALS 8
126#define ACPI_METHOD_MAX_LOCAL 7
127
128#define ACPI_METHOD_NUM_ARGS 7
129#define ACPI_METHOD_MAX_ARG 6
130
131/*
132 * Operand Stack (in WALK_STATE), Must be large enough to contain METHOD_MAX_ARG
133 */
134#define ACPI_OBJ_NUM_OPERANDS 8
135#define ACPI_OBJ_MAX_OPERAND 7
136
137/* Number of elements in the Result Stack frame, can be an arbitrary value */
138
139#define ACPI_RESULTS_FRAME_OBJ_NUM 8
140
141/*
142 * Maximal number of elements the Result Stack can contain,
143 * it may be an arbitrary value not exceeding the types of
144 * result_size and result_count (now u8).
145 */
146#define ACPI_RESULTS_OBJ_NUM_MAX 255
147
148/* Constants used in searching for the RSDP in low memory */
149
150#define ACPI_EBDA_PTR_LOCATION 0x0000040E /* Physical Address */
151#define ACPI_EBDA_PTR_LENGTH 2
152#define ACPI_EBDA_WINDOW_SIZE 1024
153#define ACPI_HI_RSDP_WINDOW_BASE 0x000E0000 /* Physical Address */
154#define ACPI_HI_RSDP_WINDOW_SIZE 0x00020000
155#define ACPI_RSDP_SCAN_STEP 16
156
157/* Operation regions */
158
159#define ACPI_USER_REGION_BEGIN 0x80
160
161/* Maximum space_ids for Operation Regions */
162
163#define ACPI_MAX_ADDRESS_SPACE 255
164#define ACPI_NUM_DEFAULT_SPACES 4
165
166/* Array sizes. Used for range checking also */
167
168#define ACPI_MAX_MATCH_OPCODE 5
169
170/* RSDP checksums */
171
172#define ACPI_RSDP_CHECKSUM_LENGTH 20
173#define ACPI_RSDP_XCHECKSUM_LENGTH 36
174
175/*
176 * SMBus, GSBus and IPMI buffer sizes. All have a 2-byte header,
177 * containing both Status and Length.
178 */
179#define ACPI_SERIAL_HEADER_SIZE 2 /* Common for below. Status and Length fields */
180
181#define ACPI_SMBUS_DATA_SIZE 32
182#define ACPI_SMBUS_BUFFER_SIZE ACPI_SERIAL_HEADER_SIZE + ACPI_SMBUS_DATA_SIZE
183
184#define ACPI_IPMI_DATA_SIZE 64
185#define ACPI_IPMI_BUFFER_SIZE ACPI_SERIAL_HEADER_SIZE + ACPI_IPMI_DATA_SIZE
186
187#define ACPI_MAX_GSBUS_DATA_SIZE 255
188#define ACPI_MAX_GSBUS_BUFFER_SIZE ACPI_SERIAL_HEADER_SIZE + ACPI_MAX_GSBUS_DATA_SIZE
189
190#define ACPI_PRM_INPUT_BUFFER_SIZE 26
191
192#define ACPI_FFH_INPUT_BUFFER_SIZE 256
193
194/* _sx_d and _sx_w control methods */
195
196#define ACPI_NUM_sx_d_METHODS 4
197#define ACPI_NUM_sx_w_METHODS 5
198
199/******************************************************************************
200 *
201 * Miscellaneous constants
202 *
203 *****************************************************************************/
204
205/* UUID constants */
206
207#define UUID_BUFFER_LENGTH 16 /* Length of UUID in memory */
208#define UUID_STRING_LENGTH 36 /* Total length of a UUID string */
209
210/* Positions for required hyphens (dashes) in UUID strings */
211
212#define UUID_HYPHEN1_OFFSET 8
213#define UUID_HYPHEN2_OFFSET 13
214#define UUID_HYPHEN3_OFFSET 18
215#define UUID_HYPHEN4_OFFSET 23
216
217/******************************************************************************
218 *
219 * ACPI AML Debugger
220 *
221 *****************************************************************************/
222
223#define ACPI_DEBUGGER_MAX_ARGS ACPI_METHOD_NUM_ARGS + 4 /* Max command line arguments */
224#define ACPI_DB_LINE_BUFFER_SIZE 512
225
226#define ACPI_DEBUGGER_COMMAND_PROMPT '-'
227#define ACPI_DEBUGGER_EXECUTE_PROMPT '%'
228
229#endif /* _ACCONFIG_H */