1 /******************************************************************************
2 *
3 * Module Name: exutils - interpreter/scanner utilities
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2023, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 /*
153 * DEFINE_AML_GLOBALS is tested in amlcode.h
154 * to determine whether certain global names should be "defined" or only
155 * "declared" in the current compilation. This enhances maintainability
156 * by enabling a single header file to embody all knowledge of the names
157 * in question.
158 *
159 * Exactly one module of any executable should #define DEFINE_GLOBALS
160 * before #including the header files which use this convention. The
161 * names in question will be defined and initialized in that module,
162 * and declared as extern in all other modules which #include those
163 * header files.
164 */
165
166 #define DEFINE_AML_GLOBALS
167
168 #include "acpi.h"
169 #include "accommon.h"
170 #include "acinterp.h"
171 #include "amlcode.h"
172
173 #define _COMPONENT ACPI_EXECUTER
174 ACPI_MODULE_NAME ("exutils")
175
176 /* Local prototypes */
177
178 static UINT32
179 AcpiExDigitsNeeded (
180 UINT64 Value,
181 UINT32 Base);
182
183
184 /*******************************************************************************
185 *
186 * FUNCTION: AcpiExEnterInterpreter
187 *
188 * PARAMETERS: None
189 *
190 * RETURN: None
191 *
192 * DESCRIPTION: Enter the interpreter execution region. Failure to enter
193 * the interpreter region is a fatal system error. Used in
194 * conjunction with ExitInterpreter.
195 *
196 ******************************************************************************/
197
198 void
AcpiExEnterInterpreter(void)199 AcpiExEnterInterpreter (
200 void)
201 {
202 ACPI_STATUS Status;
203
204
205 ACPI_FUNCTION_TRACE (ExEnterInterpreter);
206
207
208 Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER);
209 if (ACPI_FAILURE (Status))
210 {
211 ACPI_ERROR ((AE_INFO, "Could not acquire AML Interpreter mutex"));
212 }
213 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
214 if (ACPI_FAILURE (Status))
215 {
216 ACPI_ERROR ((AE_INFO, "Could not acquire AML Namespace mutex"));
217 }
218
219 return_VOID;
220 }
221
222
223 /*******************************************************************************
224 *
225 * FUNCTION: AcpiExExitInterpreter
226 *
227 * PARAMETERS: None
228 *
229 * RETURN: None
230 *
231 * DESCRIPTION: Exit the interpreter execution region. This is the top level
232 * routine used to exit the interpreter when all processing has
233 * been completed, or when the method blocks.
234 *
235 * Cases where the interpreter is unlocked internally:
236 * 1) Method will be blocked on a Sleep() AML opcode
237 * 2) Method will be blocked on an Acquire() AML opcode
238 * 3) Method will be blocked on a Wait() AML opcode
239 * 4) Method will be blocked to acquire the global lock
240 * 5) Method will be blocked waiting to execute a serialized control
241 * method that is currently executing
242 * 6) About to invoke a user-installed opregion handler
243 *
244 ******************************************************************************/
245
246 void
AcpiExExitInterpreter(void)247 AcpiExExitInterpreter (
248 void)
249 {
250 ACPI_STATUS Status;
251
252
253 ACPI_FUNCTION_TRACE (ExExitInterpreter);
254
255
256 Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
257 if (ACPI_FAILURE (Status))
258 {
259 ACPI_ERROR ((AE_INFO, "Could not release AML Namespace mutex"));
260 }
261 Status = AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER);
262 if (ACPI_FAILURE (Status))
263 {
264 ACPI_ERROR ((AE_INFO, "Could not release AML Interpreter mutex"));
265 }
266
267 return_VOID;
268 }
269
270
271 /*******************************************************************************
272 *
273 * FUNCTION: AcpiExTruncateFor32bitTable
274 *
275 * PARAMETERS: ObjDesc - Object to be truncated
276 *
277 * RETURN: TRUE if a truncation was performed, FALSE otherwise.
278 *
279 * DESCRIPTION: Truncate an ACPI Integer to 32 bits if the execution mode is
280 * 32-bit, as determined by the revision of the DSDT.
281 *
282 ******************************************************************************/
283
284 BOOLEAN
AcpiExTruncateFor32bitTable(ACPI_OPERAND_OBJECT * ObjDesc)285 AcpiExTruncateFor32bitTable (
286 ACPI_OPERAND_OBJECT *ObjDesc)
287 {
288
289 ACPI_FUNCTION_ENTRY ();
290
291
292 /*
293 * Object must be a valid number and we must be executing
294 * a control method. Object could be NS node for AML_INT_NAMEPATH_OP.
295 */
296 if ((!ObjDesc) ||
297 (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) != ACPI_DESC_TYPE_OPERAND) ||
298 (ObjDesc->Common.Type != ACPI_TYPE_INTEGER))
299 {
300 return (FALSE);
301 }
302
303 if ((AcpiGbl_IntegerByteWidth == 4) &&
304 (ObjDesc->Integer.Value > (UINT64) ACPI_UINT32_MAX))
305 {
306 /*
307 * We are executing in a 32-bit ACPI table. Truncate
308 * the value to 32 bits by zeroing out the upper 32-bit field
309 */
310 ObjDesc->Integer.Value &= (UINT64) ACPI_UINT32_MAX;
311 return (TRUE);
312 }
313
314 return (FALSE);
315 }
316
317
318 /*******************************************************************************
319 *
320 * FUNCTION: AcpiExAcquireGlobalLock
321 *
322 * PARAMETERS: FieldFlags - Flags with Lock rule:
323 * AlwaysLock or NeverLock
324 *
325 * RETURN: None
326 *
327 * DESCRIPTION: Obtain the ACPI hardware Global Lock, only if the field
328 * flags specify that it is to be obtained before field access.
329 *
330 ******************************************************************************/
331
332 void
AcpiExAcquireGlobalLock(UINT32 FieldFlags)333 AcpiExAcquireGlobalLock (
334 UINT32 FieldFlags)
335 {
336 ACPI_STATUS Status;
337
338
339 ACPI_FUNCTION_TRACE (ExAcquireGlobalLock);
340
341
342 /* Only use the lock if the AlwaysLock bit is set */
343
344 if (!(FieldFlags & AML_FIELD_LOCK_RULE_MASK))
345 {
346 return_VOID;
347 }
348
349 /* Attempt to get the global lock, wait forever */
350
351 Status = AcpiExAcquireMutexObject (ACPI_WAIT_FOREVER,
352 AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ());
353
354 if (ACPI_FAILURE (Status))
355 {
356 ACPI_EXCEPTION ((AE_INFO, Status,
357 "Could not acquire Global Lock"));
358 }
359
360 return_VOID;
361 }
362
363
364 /*******************************************************************************
365 *
366 * FUNCTION: AcpiExReleaseGlobalLock
367 *
368 * PARAMETERS: FieldFlags - Flags with Lock rule:
369 * AlwaysLock or NeverLock
370 *
371 * RETURN: None
372 *
373 * DESCRIPTION: Release the ACPI hardware Global Lock
374 *
375 ******************************************************************************/
376
377 void
AcpiExReleaseGlobalLock(UINT32 FieldFlags)378 AcpiExReleaseGlobalLock (
379 UINT32 FieldFlags)
380 {
381 ACPI_STATUS Status;
382
383
384 ACPI_FUNCTION_TRACE (ExReleaseGlobalLock);
385
386
387 /* Only use the lock if the AlwaysLock bit is set */
388
389 if (!(FieldFlags & AML_FIELD_LOCK_RULE_MASK))
390 {
391 return_VOID;
392 }
393
394 /* Release the global lock */
395
396 Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex);
397 if (ACPI_FAILURE (Status))
398 {
399 /* Report the error, but there isn't much else we can do */
400
401 ACPI_EXCEPTION ((AE_INFO, Status,
402 "Could not release Global Lock"));
403 }
404
405 return_VOID;
406 }
407
408
409 /*******************************************************************************
410 *
411 * FUNCTION: AcpiExDigitsNeeded
412 *
413 * PARAMETERS: Value - Value to be represented
414 * Base - Base of representation
415 *
416 * RETURN: The number of digits.
417 *
418 * DESCRIPTION: Calculate the number of digits needed to represent the Value
419 * in the given Base (Radix)
420 *
421 ******************************************************************************/
422
423 static UINT32
AcpiExDigitsNeeded(UINT64 Value,UINT32 Base)424 AcpiExDigitsNeeded (
425 UINT64 Value,
426 UINT32 Base)
427 {
428 UINT32 NumDigits;
429 UINT64 CurrentValue;
430
431
432 ACPI_FUNCTION_TRACE (ExDigitsNeeded);
433
434
435 /* UINT64 is unsigned, so we don't worry about a '-' prefix */
436
437 if (Value == 0)
438 {
439 return_UINT32 (1);
440 }
441
442 CurrentValue = Value;
443 NumDigits = 0;
444
445 /* Count the digits in the requested base */
446
447 while (CurrentValue)
448 {
449 (void) AcpiUtShortDivide (CurrentValue, Base, &CurrentValue, NULL);
450 NumDigits++;
451 }
452
453 return_UINT32 (NumDigits);
454 }
455
456
457 /*******************************************************************************
458 *
459 * FUNCTION: AcpiExEisaIdToString
460 *
461 * PARAMETERS: OutString - Where to put the converted string (8 bytes)
462 * CompressedId - EISAID to be converted
463 *
464 * RETURN: None
465 *
466 * DESCRIPTION: Convert a numeric EISAID to string representation. Return
467 * buffer must be large enough to hold the string. The string
468 * returned is always exactly of length ACPI_EISAID_STRING_SIZE
469 * (includes null terminator). The EISAID is always 32 bits.
470 *
471 ******************************************************************************/
472
473 void
AcpiExEisaIdToString(char * OutString,UINT64 CompressedId)474 AcpiExEisaIdToString (
475 char *OutString,
476 UINT64 CompressedId)
477 {
478 UINT32 SwappedId;
479
480
481 ACPI_FUNCTION_ENTRY ();
482
483
484 /* The EISAID should be a 32-bit integer */
485
486 if (CompressedId > ACPI_UINT32_MAX)
487 {
488 ACPI_WARNING ((AE_INFO,
489 "Expected EISAID is larger than 32 bits: "
490 "0x%8.8X%8.8X, truncating",
491 ACPI_FORMAT_UINT64 (CompressedId)));
492 }
493
494 /* Swap ID to big-endian to get contiguous bits */
495
496 SwappedId = AcpiUtDwordByteSwap ((UINT32) CompressedId);
497
498 /* First 3 bytes are uppercase letters. Next 4 bytes are hexadecimal */
499
500 OutString[0] = (char) (0x40 + (((unsigned long) SwappedId >> 26) & 0x1F));
501 OutString[1] = (char) (0x40 + ((SwappedId >> 21) & 0x1F));
502 OutString[2] = (char) (0x40 + ((SwappedId >> 16) & 0x1F));
503 OutString[3] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 12);
504 OutString[4] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 8);
505 OutString[5] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 4);
506 OutString[6] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 0);
507 OutString[7] = 0;
508 }
509
510
511 /*******************************************************************************
512 *
513 * FUNCTION: AcpiExIntegerToString
514 *
515 * PARAMETERS: OutString - Where to put the converted string. At least
516 * 21 bytes are needed to hold the largest
517 * possible 64-bit integer.
518 * Value - Value to be converted
519 *
520 * RETURN: Converted string in OutString
521 *
522 * DESCRIPTION: Convert a 64-bit integer to decimal string representation.
523 * Assumes string buffer is large enough to hold the string. The
524 * largest string is (ACPI_MAX64_DECIMAL_DIGITS + 1).
525 *
526 ******************************************************************************/
527
528 void
AcpiExIntegerToString(char * OutString,UINT64 Value)529 AcpiExIntegerToString (
530 char *OutString,
531 UINT64 Value)
532 {
533 UINT32 Count;
534 UINT32 DigitsNeeded;
535 UINT32 Remainder;
536
537
538 ACPI_FUNCTION_ENTRY ();
539
540
541 DigitsNeeded = AcpiExDigitsNeeded (Value, 10);
542 OutString[DigitsNeeded] = 0;
543
544 for (Count = DigitsNeeded; Count > 0; Count--)
545 {
546 (void) AcpiUtShortDivide (Value, 10, &Value, &Remainder);
547 OutString[Count-1] = (char) ('0' + Remainder);\
548 }
549 }
550
551
552 /*******************************************************************************
553 *
554 * FUNCTION: AcpiExPciClsToString
555 *
556 * PARAMETERS: OutString - Where to put the converted string (7 bytes)
557 * ClassCode - PCI class code to be converted (3 bytes)
558 *
559 * RETURN: Converted string in OutString
560 *
561 * DESCRIPTION: Convert 3-bytes PCI class code to string representation.
562 * Return buffer must be large enough to hold the string. The
563 * string returned is always exactly of length
564 * ACPI_PCICLS_STRING_SIZE (includes null terminator).
565 *
566 ******************************************************************************/
567
568 void
AcpiExPciClsToString(char * OutString,UINT8 ClassCode[3])569 AcpiExPciClsToString (
570 char *OutString,
571 UINT8 ClassCode[3])
572 {
573
574 ACPI_FUNCTION_ENTRY ();
575
576
577 /* All 3 bytes are hexadecimal */
578
579 OutString[0] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[0], 4);
580 OutString[1] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[0], 0);
581 OutString[2] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[1], 4);
582 OutString[3] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[1], 0);
583 OutString[4] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[2], 4);
584 OutString[5] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[2], 0);
585 OutString[6] = 0;
586 }
587
588
589 /*******************************************************************************
590 *
591 * FUNCTION: AcpiIsValidSpaceId
592 *
593 * PARAMETERS: SpaceId - ID to be validated
594 *
595 * RETURN: TRUE if SpaceId is a valid/supported ID.
596 *
597 * DESCRIPTION: Validate an operation region SpaceID.
598 *
599 ******************************************************************************/
600
601 BOOLEAN
AcpiIsValidSpaceId(UINT8 SpaceId)602 AcpiIsValidSpaceId (
603 UINT8 SpaceId)
604 {
605
606 if ((SpaceId >= ACPI_NUM_PREDEFINED_REGIONS) &&
607 (SpaceId < ACPI_USER_REGION_BEGIN) &&
608 (SpaceId != ACPI_ADR_SPACE_DATA_TABLE) &&
609 (SpaceId != ACPI_ADR_SPACE_FIXED_HARDWARE))
610 {
611 return (FALSE);
612 }
613
614 return (TRUE);
615 }
616
