1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: utdecode - Utility decoding routines (value-to-string)
5 *
6 * Copyright (C) 2000 - 2025, Intel Corp.
7 *
8 *****************************************************************************/
9
10#include <acpi/acpi.h>
11#include "accommon.h"
12#include "acnamesp.h"
13#include "amlcode.h"
14
15#define _COMPONENT ACPI_UTILITIES
16ACPI_MODULE_NAME("utdecode")
17
18/*
19 * Properties of the ACPI Object Types, both internal and external.
20 * The table is indexed by values of acpi_object_type
21 */
22const u8 acpi_gbl_ns_properties[ACPI_NUM_NS_TYPES] = {
23 ACPI_NS_NORMAL, /* 00 Any */
24 ACPI_NS_NORMAL, /* 01 Number */
25 ACPI_NS_NORMAL, /* 02 String */
26 ACPI_NS_NORMAL, /* 03 Buffer */
27 ACPI_NS_NORMAL, /* 04 Package */
28 ACPI_NS_NORMAL, /* 05 field_unit */
29 ACPI_NS_NEWSCOPE, /* 06 Device */
30 ACPI_NS_NORMAL, /* 07 Event */
31 ACPI_NS_NEWSCOPE, /* 08 Method */
32 ACPI_NS_NORMAL, /* 09 Mutex */
33 ACPI_NS_NORMAL, /* 10 Region */
34 ACPI_NS_NEWSCOPE, /* 11 Power */
35 ACPI_NS_NEWSCOPE, /* 12 Processor */
36 ACPI_NS_NEWSCOPE, /* 13 Thermal */
37 ACPI_NS_NORMAL, /* 14 buffer_field */
38 ACPI_NS_NORMAL, /* 15 ddb_handle */
39 ACPI_NS_NORMAL, /* 16 Debug Object */
40 ACPI_NS_NORMAL, /* 17 def_field */
41 ACPI_NS_NORMAL, /* 18 bank_field */
42 ACPI_NS_NORMAL, /* 19 index_field */
43 ACPI_NS_NORMAL, /* 20 Reference */
44 ACPI_NS_NORMAL, /* 21 Alias */
45 ACPI_NS_NORMAL, /* 22 method_alias */
46 ACPI_NS_NORMAL, /* 23 Notify */
47 ACPI_NS_NORMAL, /* 24 Address Handler */
48 ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL, /* 25 Resource Desc */
49 ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL, /* 26 Resource Field */
50 ACPI_NS_NEWSCOPE, /* 27 Scope */
51 ACPI_NS_NORMAL, /* 28 Extra */
52 ACPI_NS_NORMAL, /* 29 Data */
53 ACPI_NS_NORMAL /* 30 Invalid */
54};
55
56/*******************************************************************************
57 *
58 * FUNCTION: acpi_ut_get_region_name
59 *
60 * PARAMETERS: Space ID - ID for the region
61 *
62 * RETURN: Decoded region space_id name
63 *
64 * DESCRIPTION: Translate a Space ID into a name string (Debug only)
65 *
66 ******************************************************************************/
67
68/* Region type decoding */
69
70const char *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] = {
71 "SystemMemory", /* 0x00 */
72 "SystemIO", /* 0x01 */
73 "PCI_Config", /* 0x02 */
74 "EmbeddedControl", /* 0x03 */
75 "SMBus", /* 0x04 */
76 "SystemCMOS", /* 0x05 */
77 "PCIBARTarget", /* 0x06 */
78 "IPMI", /* 0x07 */
79 "GeneralPurposeIo", /* 0x08 */
80 "GenericSerialBus", /* 0x09 */
81 "PCC", /* 0x0A */
82 "PlatformRtMechanism" /* 0x0B */
83};
84
85const char *acpi_ut_get_region_name(u8 space_id)
86{
87
88 if (space_id >= ACPI_USER_REGION_BEGIN) {
89 return ("UserDefinedRegion");
90 } else if (space_id == ACPI_ADR_SPACE_DATA_TABLE) {
91 return ("DataTable");
92 } else if (space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {
93 return ("FunctionalFixedHW");
94 } else if (space_id >= ACPI_NUM_PREDEFINED_REGIONS) {
95 return ("InvalidSpaceId");
96 }
97
98 return (acpi_gbl_region_types[space_id]);
99}
100
101/*******************************************************************************
102 *
103 * FUNCTION: acpi_ut_get_event_name
104 *
105 * PARAMETERS: event_id - Fixed event ID
106 *
107 * RETURN: Decoded event ID name
108 *
109 * DESCRIPTION: Translate a Event ID into a name string (Debug only)
110 *
111 ******************************************************************************/
112
113/* Event type decoding */
114
115static const char *acpi_gbl_event_types[ACPI_NUM_FIXED_EVENTS] = {
116 "PM_Timer",
117 "GlobalLock",
118 "PowerButton",
119 "SleepButton",
120 "RealTimeClock",
121};
122
123const char *acpi_ut_get_event_name(u32 event_id)
124{
125
126 if (event_id > ACPI_EVENT_MAX) {
127 return ("InvalidEventID");
128 }
129
130 return (acpi_gbl_event_types[event_id]);
131}
132
133/*******************************************************************************
134 *
135 * FUNCTION: acpi_ut_get_type_name
136 *
137 * PARAMETERS: type - An ACPI object type
138 *
139 * RETURN: Decoded ACPI object type name
140 *
141 * DESCRIPTION: Translate a Type ID into a name string (Debug only)
142 *
143 ******************************************************************************/
144
145/*
146 * Elements of acpi_gbl_ns_type_names below must match
147 * one-to-one with values of acpi_object_type
148 *
149 * The type ACPI_TYPE_ANY (Untyped) is used as a "don't care" when searching;
150 * when stored in a table it really means that we have thus far seen no
151 * evidence to indicate what type is actually going to be stored for this
152 & entry.
153 */
154static const char acpi_gbl_bad_type[] = "UNDEFINED";
155
156/* Printable names of the ACPI object types */
157
158static const char *acpi_gbl_ns_type_names[] = {
159 /* 00 */ "Untyped",
160 /* 01 */ "Integer",
161 /* 02 */ "String",
162 /* 03 */ "Buffer",
163 /* 04 */ "Package",
164 /* 05 */ "FieldUnit",
165 /* 06 */ "Device",
166 /* 07 */ "Event",
167 /* 08 */ "Method",
168 /* 09 */ "Mutex",
169 /* 10 */ "Region",
170 /* 11 */ "Power",
171 /* 12 */ "Processor",
172 /* 13 */ "Thermal",
173 /* 14 */ "BufferField",
174 /* 15 */ "DdbHandle",
175 /* 16 */ "DebugObject",
176 /* 17 */ "RegionField",
177 /* 18 */ "BankField",
178 /* 19 */ "IndexField",
179 /* 20 */ "Reference",
180 /* 21 */ "Alias",
181 /* 22 */ "MethodAlias",
182 /* 23 */ "Notify",
183 /* 24 */ "AddrHandler",
184 /* 25 */ "ResourceDesc",
185 /* 26 */ "ResourceFld",
186 /* 27 */ "Scope",
187 /* 28 */ "Extra",
188 /* 29 */ "Data",
189 /* 30 */ "Invalid"
190};
191
192const char *acpi_ut_get_type_name(acpi_object_type type)
193{
194
195 if (type > ACPI_TYPE_INVALID) {
196 return (acpi_gbl_bad_type);
197 }
198
199 return (acpi_gbl_ns_type_names[type]);
200}
201
202const char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
203{
204 ACPI_FUNCTION_TRACE(ut_get_object_type_name);
205
206 if (!obj_desc) {
207 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Null Object Descriptor\n"));
208 return_STR("[NULL Object Descriptor]");
209 }
210
211 /* These descriptor types share a common area */
212
213 if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != ACPI_DESC_TYPE_OPERAND) &&
214 (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != ACPI_DESC_TYPE_NAMED)) {
215 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
216 "Invalid object descriptor type: 0x%2.2X [%s] (%p)\n",
217 ACPI_GET_DESCRIPTOR_TYPE(obj_desc),
218 acpi_ut_get_descriptor_name(obj_desc),
219 obj_desc));
220
221 return_STR("Invalid object");
222 }
223
224 return_STR(acpi_ut_get_type_name(obj_desc->common.type));
225}
226
227/*******************************************************************************
228 *
229 * FUNCTION: acpi_ut_get_node_name
230 *
231 * PARAMETERS: object - A namespace node
232 *
233 * RETURN: ASCII name of the node
234 *
235 * DESCRIPTION: Validate the node and return the node's ACPI name.
236 *
237 ******************************************************************************/
238
239const char *acpi_ut_get_node_name(void *object)
240{
241 struct acpi_namespace_node *node = (struct acpi_namespace_node *)object;
242
243 /* Must return a string of exactly 4 characters == ACPI_NAMESEG_SIZE */
244
245 if (!object) {
246 return ("NULL");
247 }
248
249 /* Check for Root node */
250
251 if ((object == ACPI_ROOT_OBJECT) || (object == acpi_gbl_root_node)) {
252 return ("\"\\\" ");
253 }
254
255 /* Descriptor must be a namespace node */
256
257 if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
258 return ("####");
259 }
260
261 /*
262 * Ensure name is valid. The name was validated/repaired when the node
263 * was created, but make sure it has not been corrupted.
264 */
265 acpi_ut_repair_name(name: node->name.ascii);
266
267 /* Return the name */
268
269 return (node->name.ascii);
270}
271
272/*******************************************************************************
273 *
274 * FUNCTION: acpi_ut_get_descriptor_name
275 *
276 * PARAMETERS: object - An ACPI object
277 *
278 * RETURN: Decoded name of the descriptor type
279 *
280 * DESCRIPTION: Validate object and return the descriptor type
281 *
282 ******************************************************************************/
283
284/* Printable names of object descriptor types */
285
286static const char *acpi_gbl_desc_type_names[] = {
287 /* 00 */ "Not a Descriptor",
288 /* 01 */ "Cached Object",
289 /* 02 */ "State-Generic",
290 /* 03 */ "State-Update",
291 /* 04 */ "State-Package",
292 /* 05 */ "State-Control",
293 /* 06 */ "State-RootParseScope",
294 /* 07 */ "State-ParseScope",
295 /* 08 */ "State-WalkScope",
296 /* 09 */ "State-Result",
297 /* 10 */ "State-Notify",
298 /* 11 */ "State-Thread",
299 /* 12 */ "Tree Walk State",
300 /* 13 */ "Parse Tree Op",
301 /* 14 */ "Operand Object",
302 /* 15 */ "Namespace Node"
303};
304
305const char *acpi_ut_get_descriptor_name(void *object)
306{
307
308 if (!object) {
309 return ("NULL OBJECT");
310 }
311
312 if (ACPI_GET_DESCRIPTOR_TYPE(object) > ACPI_DESC_TYPE_MAX) {
313 return ("Not a Descriptor");
314 }
315
316 return (acpi_gbl_desc_type_names[ACPI_GET_DESCRIPTOR_TYPE(object)]);
317}
318
319/*******************************************************************************
320 *
321 * FUNCTION: acpi_ut_get_reference_name
322 *
323 * PARAMETERS: object - An ACPI reference object
324 *
325 * RETURN: Decoded name of the type of reference
326 *
327 * DESCRIPTION: Decode a reference object sub-type to a string.
328 *
329 ******************************************************************************/
330
331/* Printable names of reference object sub-types */
332
333static const char *acpi_gbl_ref_class_names[] = {
334 /* 00 */ "Local",
335 /* 01 */ "Argument",
336 /* 02 */ "RefOf",
337 /* 03 */ "Index",
338 /* 04 */ "DdbHandle",
339 /* 05 */ "Named Object",
340 /* 06 */ "Debug"
341};
342
343const char *acpi_ut_get_reference_name(union acpi_operand_object *object)
344{
345
346 if (!object) {
347 return ("NULL Object");
348 }
349
350 if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) {
351 return ("Not an Operand object");
352 }
353
354 if (object->common.type != ACPI_TYPE_LOCAL_REFERENCE) {
355 return ("Not a Reference object");
356 }
357
358 if (object->reference.class > ACPI_REFCLASS_MAX) {
359 return ("Unknown Reference class");
360 }
361
362 return (acpi_gbl_ref_class_names[object->reference.class]);
363}
364
365/*******************************************************************************
366 *
367 * FUNCTION: acpi_ut_get_mutex_name
368 *
369 * PARAMETERS: mutex_id - The predefined ID for this mutex.
370 *
371 * RETURN: Decoded name of the internal mutex
372 *
373 * DESCRIPTION: Translate a mutex ID into a name string (Debug only)
374 *
375 ******************************************************************************/
376
377/* Names for internal mutex objects, used for debug output */
378
379static const char *acpi_gbl_mutex_names[ACPI_NUM_MUTEX] = {
380 "ACPI_MTX_Interpreter",
381 "ACPI_MTX_Namespace",
382 "ACPI_MTX_Tables",
383 "ACPI_MTX_Events",
384 "ACPI_MTX_Caches",
385 "ACPI_MTX_Memory",
386};
387
388const char *acpi_ut_get_mutex_name(u32 mutex_id)
389{
390
391 if (mutex_id > ACPI_MAX_MUTEX) {
392 return ("Invalid Mutex ID");
393 }
394
395 return (acpi_gbl_mutex_names[mutex_id]);
396}
397
398#if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)
399
400/*
401 * Strings and procedures used for debug only
402 */
403
404/*******************************************************************************
405 *
406 * FUNCTION: acpi_ut_get_notify_name
407 *
408 * PARAMETERS: notify_value - Value from the Notify() request
409 *
410 * RETURN: Decoded name for the notify value
411 *
412 * DESCRIPTION: Translate a Notify Value to a notify namestring.
413 *
414 ******************************************************************************/
415
416/* Names for Notify() values, used for debug output */
417
418static const char *acpi_gbl_generic_notify[ACPI_GENERIC_NOTIFY_MAX + 1] = {
419 /* 00 */ "Bus Check",
420 /* 01 */ "Device Check",
421 /* 02 */ "Device Wake",
422 /* 03 */ "Eject Request",
423 /* 04 */ "Device Check Light",
424 /* 05 */ "Frequency Mismatch",
425 /* 06 */ "Bus Mode Mismatch",
426 /* 07 */ "Power Fault",
427 /* 08 */ "Capabilities Check",
428 /* 09 */ "Device PLD Check",
429 /* 0A */ "Reserved",
430 /* 0B */ "System Locality Update",
431 /* 0C */ "Reserved (was previously Shutdown Request)",
432 /* Reserved in ACPI 6.0 */
433 /* 0D */ "System Resource Affinity Update",
434 /* 0E */ "Heterogeneous Memory Attributes Update",
435 /* ACPI 6.2 */
436 /* 0F */ "Error Disconnect Recover"
437 /* ACPI 6.3 */
438};
439
440static const char *acpi_gbl_device_notify[5] = {
441 /* 80 */ "Status Change",
442 /* 81 */ "Information Change",
443 /* 82 */ "Device-Specific Change",
444 /* 83 */ "Device-Specific Change",
445 /* 84 */ "Reserved"
446};
447
448static const char *acpi_gbl_processor_notify[5] = {
449 /* 80 */ "Performance Capability Change",
450 /* 81 */ "C-State Change",
451 /* 82 */ "Throttling Capability Change",
452 /* 83 */ "Guaranteed Change",
453 /* 84 */ "Minimum Excursion"
454};
455
456static const char *acpi_gbl_thermal_notify[5] = {
457 /* 80 */ "Thermal Status Change",
458 /* 81 */ "Thermal Trip Point Change",
459 /* 82 */ "Thermal Device List Change",
460 /* 83 */ "Thermal Relationship Change",
461 /* 84 */ "Reserved"
462};
463
464const char *acpi_ut_get_notify_name(u32 notify_value, acpi_object_type type)
465{
466
467 /* 00 - 0F are "common to all object types" (from ACPI Spec) */
468
469 if (notify_value <= ACPI_GENERIC_NOTIFY_MAX) {
470 return (acpi_gbl_generic_notify[notify_value]);
471 }
472
473 /* 10 - 7F are reserved */
474
475 if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
476 return ("Reserved");
477 }
478
479 /* 80 - 84 are per-object-type */
480
481 if (notify_value <= ACPI_SPECIFIC_NOTIFY_MAX) {
482 switch (type) {
483 case ACPI_TYPE_ANY:
484 case ACPI_TYPE_DEVICE:
485 return (acpi_gbl_device_notify[notify_value - 0x80]);
486
487 case ACPI_TYPE_PROCESSOR:
488 return (acpi_gbl_processor_notify[notify_value - 0x80]);
489
490 case ACPI_TYPE_THERMAL:
491 return (acpi_gbl_thermal_notify[notify_value - 0x80]);
492
493 default:
494 return ("Target object type does not support notifies");
495 }
496 }
497
498 /* 84 - BF are device-specific */
499
500 if (notify_value <= ACPI_MAX_DEVICE_SPECIFIC_NOTIFY) {
501 return ("Device-Specific");
502 }
503
504 /* C0 and above are hardware-specific */
505
506 return ("Hardware-Specific");
507}
508
509/*******************************************************************************
510 *
511 * FUNCTION: acpi_ut_get_argument_type_name
512 *
513 * PARAMETERS: arg_type - an ARGP_* parser argument type
514 *
515 * RETURN: Decoded ARGP_* type
516 *
517 * DESCRIPTION: Decode an ARGP_* parser type, as defined in the amlcode.h file,
518 * and used in the acopcode.h file. For example, ARGP_TERMARG.
519 * Used for debug only.
520 *
521 ******************************************************************************/
522
523static const char *acpi_gbl_argument_type[20] = {
524 /* 00 */ "Unknown ARGP",
525 /* 01 */ "ByteData",
526 /* 02 */ "ByteList",
527 /* 03 */ "CharList",
528 /* 04 */ "DataObject",
529 /* 05 */ "DataObjectList",
530 /* 06 */ "DWordData",
531 /* 07 */ "FieldList",
532 /* 08 */ "Name",
533 /* 09 */ "NameString",
534 /* 0A */ "ObjectList",
535 /* 0B */ "PackageLength",
536 /* 0C */ "SuperName",
537 /* 0D */ "Target",
538 /* 0E */ "TermArg",
539 /* 0F */ "TermList",
540 /* 10 */ "WordData",
541 /* 11 */ "QWordData",
542 /* 12 */ "SimpleName",
543 /* 13 */ "NameOrRef"
544};
545
546const char *acpi_ut_get_argument_type_name(u32 arg_type)
547{
548
549 if (arg_type > ARGP_MAX) {
550 return ("Unknown ARGP");
551 }
552
553 return (acpi_gbl_argument_type[arg_type]);
554}
555
556#endif
557
558/*******************************************************************************
559 *
560 * FUNCTION: acpi_ut_valid_object_type
561 *
562 * PARAMETERS: type - Object type to be validated
563 *
564 * RETURN: TRUE if valid object type, FALSE otherwise
565 *
566 * DESCRIPTION: Validate an object type
567 *
568 ******************************************************************************/
569
570u8 acpi_ut_valid_object_type(acpi_object_type type)
571{
572
573 if (type > ACPI_TYPE_LOCAL_MAX) {
574
575 /* Note: Assumes all TYPEs are contiguous (external/local) */
576
577 return (FALSE);
578 }
579
580 return (TRUE);
581}
582