1 /*******************************************************************************
2 *
3 * Module Name: utresrc - Resource management utilities
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2016, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include "acpi.h"
45 #include "accommon.h"
46 #include "acresrc.h"
47
48
49 #define _COMPONENT ACPI_UTILITIES
50 ACPI_MODULE_NAME ("utresrc")
51
52
53 #if defined(ACPI_DEBUG_OUTPUT) || defined (ACPI_DISASSEMBLER) || defined (ACPI_DEBUGGER)
54
55 /*
56 * Strings used to decode resource descriptors.
57 * Used by both the disassembler and the debugger resource dump routines
58 */
59 const char *AcpiGbl_BmDecode[] =
60 {
61 "NotBusMaster",
62 "BusMaster"
63 };
64
65 const char *AcpiGbl_ConfigDecode[] =
66 {
67 "0 - Good Configuration",
68 "1 - Acceptable Configuration",
69 "2 - Suboptimal Configuration",
70 "3 - ***Invalid Configuration***",
71 };
72
73 const char *AcpiGbl_ConsumeDecode[] =
74 {
75 "ResourceProducer",
76 "ResourceConsumer"
77 };
78
79 const char *AcpiGbl_DecDecode[] =
80 {
81 "PosDecode",
82 "SubDecode"
83 };
84
85 const char *AcpiGbl_HeDecode[] =
86 {
87 "Level",
88 "Edge"
89 };
90
91 const char *AcpiGbl_IoDecode[] =
92 {
93 "Decode10",
94 "Decode16"
95 };
96
97 const char *AcpiGbl_LlDecode[] =
98 {
99 "ActiveHigh",
100 "ActiveLow",
101 "ActiveBoth",
102 "Reserved"
103 };
104
105 const char *AcpiGbl_MaxDecode[] =
106 {
107 "MaxNotFixed",
108 "MaxFixed"
109 };
110
111 const char *AcpiGbl_MemDecode[] =
112 {
113 "NonCacheable",
114 "Cacheable",
115 "WriteCombining",
116 "Prefetchable"
117 };
118
119 const char *AcpiGbl_MinDecode[] =
120 {
121 "MinNotFixed",
122 "MinFixed"
123 };
124
125 const char *AcpiGbl_MtpDecode[] =
126 {
127 "AddressRangeMemory",
128 "AddressRangeReserved",
129 "AddressRangeACPI",
130 "AddressRangeNVS"
131 };
132
133 const char *AcpiGbl_RngDecode[] =
134 {
135 "InvalidRanges",
136 "NonISAOnlyRanges",
137 "ISAOnlyRanges",
138 "EntireRange"
139 };
140
141 const char *AcpiGbl_RwDecode[] =
142 {
143 "ReadOnly",
144 "ReadWrite"
145 };
146
147 const char *AcpiGbl_ShrDecode[] =
148 {
149 "Exclusive",
150 "Shared",
151 "ExclusiveAndWake", /* ACPI 5.0 */
152 "SharedAndWake" /* ACPI 5.0 */
153 };
154
155 const char *AcpiGbl_SizDecode[] =
156 {
157 "Transfer8",
158 "Transfer8_16",
159 "Transfer16",
160 "InvalidSize"
161 };
162
163 const char *AcpiGbl_TrsDecode[] =
164 {
165 "DenseTranslation",
166 "SparseTranslation"
167 };
168
169 const char *AcpiGbl_TtpDecode[] =
170 {
171 "TypeStatic",
172 "TypeTranslation"
173 };
174
175 const char *AcpiGbl_TypDecode[] =
176 {
177 "Compatibility",
178 "TypeA",
179 "TypeB",
180 "TypeF"
181 };
182
183 const char *AcpiGbl_PpcDecode[] =
184 {
185 "PullDefault",
186 "PullUp",
187 "PullDown",
188 "PullNone"
189 };
190
191 const char *AcpiGbl_IorDecode[] =
192 {
193 "IoRestrictionNone",
194 "IoRestrictionInputOnly",
195 "IoRestrictionOutputOnly",
196 "IoRestrictionNoneAndPreserve"
197 };
198
199 const char *AcpiGbl_DtsDecode[] =
200 {
201 "Width8bit",
202 "Width16bit",
203 "Width32bit",
204 "Width64bit",
205 "Width128bit",
206 "Width256bit",
207 };
208
209 /* GPIO connection type */
210
211 const char *AcpiGbl_CtDecode[] =
212 {
213 "Interrupt",
214 "I/O"
215 };
216
217 /* Serial bus type */
218
219 const char *AcpiGbl_SbtDecode[] =
220 {
221 "/* UNKNOWN serial bus type */",
222 "I2C",
223 "SPI",
224 "UART"
225 };
226
227 /* I2C serial bus access mode */
228
229 const char *AcpiGbl_AmDecode[] =
230 {
231 "AddressingMode7Bit",
232 "AddressingMode10Bit"
233 };
234
235 /* I2C serial bus slave mode */
236
237 const char *AcpiGbl_SmDecode[] =
238 {
239 "ControllerInitiated",
240 "DeviceInitiated"
241 };
242
243 /* SPI serial bus wire mode */
244
245 const char *AcpiGbl_WmDecode[] =
246 {
247 "FourWireMode",
248 "ThreeWireMode"
249 };
250
251 /* SPI serial clock phase */
252
253 const char *AcpiGbl_CphDecode[] =
254 {
255 "ClockPhaseFirst",
256 "ClockPhaseSecond"
257 };
258
259 /* SPI serial bus clock polarity */
260
261 const char *AcpiGbl_CpoDecode[] =
262 {
263 "ClockPolarityLow",
264 "ClockPolarityHigh"
265 };
266
267 /* SPI serial bus device polarity */
268
269 const char *AcpiGbl_DpDecode[] =
270 {
271 "PolarityLow",
272 "PolarityHigh"
273 };
274
275 /* UART serial bus endian */
276
277 const char *AcpiGbl_EdDecode[] =
278 {
279 "LittleEndian",
280 "BigEndian"
281 };
282
283 /* UART serial bus bits per byte */
284
285 const char *AcpiGbl_BpbDecode[] =
286 {
287 "DataBitsFive",
288 "DataBitsSix",
289 "DataBitsSeven",
290 "DataBitsEight",
291 "DataBitsNine",
292 "/* UNKNOWN Bits per byte */",
293 "/* UNKNOWN Bits per byte */",
294 "/* UNKNOWN Bits per byte */"
295 };
296
297 /* UART serial bus stop bits */
298
299 const char *AcpiGbl_SbDecode[] =
300 {
301 "StopBitsZero",
302 "StopBitsOne",
303 "StopBitsOnePlusHalf",
304 "StopBitsTwo"
305 };
306
307 /* UART serial bus flow control */
308
309 const char *AcpiGbl_FcDecode[] =
310 {
311 "FlowControlNone",
312 "FlowControlHardware",
313 "FlowControlXON",
314 "/* UNKNOWN flow control keyword */"
315 };
316
317 /* UART serial bus parity type */
318
319 const char *AcpiGbl_PtDecode[] =
320 {
321 "ParityTypeNone",
322 "ParityTypeEven",
323 "ParityTypeOdd",
324 "ParityTypeMark",
325 "ParityTypeSpace",
326 "/* UNKNOWN parity keyword */",
327 "/* UNKNOWN parity keyword */",
328 "/* UNKNOWN parity keyword */"
329 };
330
331 #endif
332
333
334 /*
335 * Base sizes of the raw AML resource descriptors, indexed by resource type.
336 * Zero indicates a reserved (and therefore invalid) resource type.
337 */
338 const UINT8 AcpiGbl_ResourceAmlSizes[] =
339 {
340 /* Small descriptors */
341
342 0,
343 0,
344 0,
345 0,
346 ACPI_AML_SIZE_SMALL (AML_RESOURCE_IRQ),
347 ACPI_AML_SIZE_SMALL (AML_RESOURCE_DMA),
348 ACPI_AML_SIZE_SMALL (AML_RESOURCE_START_DEPENDENT),
349 ACPI_AML_SIZE_SMALL (AML_RESOURCE_END_DEPENDENT),
350 ACPI_AML_SIZE_SMALL (AML_RESOURCE_IO),
351 ACPI_AML_SIZE_SMALL (AML_RESOURCE_FIXED_IO),
352 ACPI_AML_SIZE_SMALL (AML_RESOURCE_FIXED_DMA),
353 0,
354 0,
355 0,
356 ACPI_AML_SIZE_SMALL (AML_RESOURCE_VENDOR_SMALL),
357 ACPI_AML_SIZE_SMALL (AML_RESOURCE_END_TAG),
358
359 /* Large descriptors */
360
361 0,
362 ACPI_AML_SIZE_LARGE (AML_RESOURCE_MEMORY24),
363 ACPI_AML_SIZE_LARGE (AML_RESOURCE_GENERIC_REGISTER),
364 0,
365 ACPI_AML_SIZE_LARGE (AML_RESOURCE_VENDOR_LARGE),
366 ACPI_AML_SIZE_LARGE (AML_RESOURCE_MEMORY32),
367 ACPI_AML_SIZE_LARGE (AML_RESOURCE_FIXED_MEMORY32),
368 ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS32),
369 ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS16),
370 ACPI_AML_SIZE_LARGE (AML_RESOURCE_EXTENDED_IRQ),
371 ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS64),
372 ACPI_AML_SIZE_LARGE (AML_RESOURCE_EXTENDED_ADDRESS64),
373 ACPI_AML_SIZE_LARGE (AML_RESOURCE_GPIO),
374 0,
375 ACPI_AML_SIZE_LARGE (AML_RESOURCE_COMMON_SERIALBUS),
376 };
377
378 const UINT8 AcpiGbl_ResourceAmlSerialBusSizes[] =
379 {
380 0,
381 ACPI_AML_SIZE_LARGE (AML_RESOURCE_I2C_SERIALBUS),
382 ACPI_AML_SIZE_LARGE (AML_RESOURCE_SPI_SERIALBUS),
383 ACPI_AML_SIZE_LARGE (AML_RESOURCE_UART_SERIALBUS),
384 };
385
386
387 /*
388 * Resource types, used to validate the resource length field.
389 * The length of fixed-length types must match exactly, variable
390 * lengths must meet the minimum required length, etc.
391 * Zero indicates a reserved (and therefore invalid) resource type.
392 */
393 static const UINT8 AcpiGbl_ResourceTypes[] =
394 {
395 /* Small descriptors */
396
397 0,
398 0,
399 0,
400 0,
401 ACPI_SMALL_VARIABLE_LENGTH, /* 04 IRQ */
402 ACPI_FIXED_LENGTH, /* 05 DMA */
403 ACPI_SMALL_VARIABLE_LENGTH, /* 06 StartDependentFunctions */
404 ACPI_FIXED_LENGTH, /* 07 EndDependentFunctions */
405 ACPI_FIXED_LENGTH, /* 08 IO */
406 ACPI_FIXED_LENGTH, /* 09 FixedIO */
407 ACPI_FIXED_LENGTH, /* 0A FixedDMA */
408 0,
409 0,
410 0,
411 ACPI_VARIABLE_LENGTH, /* 0E VendorShort */
412 ACPI_FIXED_LENGTH, /* 0F EndTag */
413
414 /* Large descriptors */
415
416 0,
417 ACPI_FIXED_LENGTH, /* 01 Memory24 */
418 ACPI_FIXED_LENGTH, /* 02 GenericRegister */
419 0,
420 ACPI_VARIABLE_LENGTH, /* 04 VendorLong */
421 ACPI_FIXED_LENGTH, /* 05 Memory32 */
422 ACPI_FIXED_LENGTH, /* 06 Memory32Fixed */
423 ACPI_VARIABLE_LENGTH, /* 07 Dword* address */
424 ACPI_VARIABLE_LENGTH, /* 08 Word* address */
425 ACPI_VARIABLE_LENGTH, /* 09 ExtendedIRQ */
426 ACPI_VARIABLE_LENGTH, /* 0A Qword* address */
427 ACPI_FIXED_LENGTH, /* 0B Extended* address */
428 ACPI_VARIABLE_LENGTH, /* 0C Gpio* */
429 0,
430 ACPI_VARIABLE_LENGTH /* 0E *SerialBus */
431 };
432
433
434 /*******************************************************************************
435 *
436 * FUNCTION: AcpiUtWalkAmlResources
437 *
438 * PARAMETERS: WalkState - Current walk info
439 * PARAMETERS: Aml - Pointer to the raw AML resource template
440 * AmlLength - Length of the entire template
441 * UserFunction - Called once for each descriptor found. If
442 * NULL, a pointer to the EndTag is returned
443 * Context - Passed to UserFunction
444 *
445 * RETURN: Status
446 *
447 * DESCRIPTION: Walk a raw AML resource list(buffer). User function called
448 * once for each resource found.
449 *
450 ******************************************************************************/
451
452 ACPI_STATUS
AcpiUtWalkAmlResources(ACPI_WALK_STATE * WalkState,UINT8 * Aml,ACPI_SIZE AmlLength,ACPI_WALK_AML_CALLBACK UserFunction,void ** Context)453 AcpiUtWalkAmlResources (
454 ACPI_WALK_STATE *WalkState,
455 UINT8 *Aml,
456 ACPI_SIZE AmlLength,
457 ACPI_WALK_AML_CALLBACK UserFunction,
458 void **Context)
459 {
460 ACPI_STATUS Status;
461 UINT8 *EndAml;
462 UINT8 ResourceIndex;
463 UINT32 Length;
464 UINT32 Offset = 0;
465 UINT8 EndTag[2] = {0x79, 0x00};
466
467
468 ACPI_FUNCTION_TRACE (UtWalkAmlResources);
469
470
471 /* The absolute minimum resource template is one EndTag descriptor */
472
473 if (AmlLength < sizeof (AML_RESOURCE_END_TAG))
474 {
475 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
476 }
477
478 /* Point to the end of the resource template buffer */
479
480 EndAml = Aml + AmlLength;
481
482 /* Walk the byte list, abort on any invalid descriptor type or length */
483
484 while (Aml < EndAml)
485 {
486 /* Validate the Resource Type and Resource Length */
487
488 Status = AcpiUtValidateResource (WalkState, Aml, &ResourceIndex);
489 if (ACPI_FAILURE (Status))
490 {
491 /*
492 * Exit on failure. Cannot continue because the descriptor
493 * length may be bogus also.
494 */
495 return_ACPI_STATUS (Status);
496 }
497
498 /* Get the length of this descriptor */
499
500 Length = AcpiUtGetDescriptorLength (Aml);
501
502 /* Invoke the user function */
503
504 if (UserFunction)
505 {
506 Status = UserFunction (
507 Aml, Length, Offset, ResourceIndex, Context);
508 if (ACPI_FAILURE (Status))
509 {
510 return_ACPI_STATUS (Status);
511 }
512 }
513
514 /* An EndTag descriptor terminates this resource template */
515
516 if (AcpiUtGetResourceType (Aml) == ACPI_RESOURCE_NAME_END_TAG)
517 {
518 /*
519 * There must be at least one more byte in the buffer for
520 * the 2nd byte of the EndTag
521 */
522 if ((Aml + 1) >= EndAml)
523 {
524 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
525 }
526
527 /* Return the pointer to the EndTag if requested */
528
529 if (!UserFunction)
530 {
531 *Context = Aml;
532 }
533
534 /* Normal exit */
535
536 return_ACPI_STATUS (AE_OK);
537 }
538
539 Aml += Length;
540 Offset += Length;
541 }
542
543 /* Did not find an EndTag descriptor */
544
545 if (UserFunction)
546 {
547 /* Insert an EndTag anyway. AcpiRsGetListLength always leaves room */
548
549 (void) AcpiUtValidateResource (WalkState, EndTag, &ResourceIndex);
550 Status = UserFunction (EndTag, 2, Offset, ResourceIndex, Context);
551 if (ACPI_FAILURE (Status))
552 {
553 return_ACPI_STATUS (Status);
554 }
555 }
556
557 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
558 }
559
560
561 /*******************************************************************************
562 *
563 * FUNCTION: AcpiUtValidateResource
564 *
565 * PARAMETERS: WalkState - Current walk info
566 * Aml - Pointer to the raw AML resource descriptor
567 * ReturnIndex - Where the resource index is returned. NULL
568 * if the index is not required.
569 *
570 * RETURN: Status, and optionally the Index into the global resource tables
571 *
572 * DESCRIPTION: Validate an AML resource descriptor by checking the Resource
573 * Type and Resource Length. Returns an index into the global
574 * resource information/dispatch tables for later use.
575 *
576 ******************************************************************************/
577
578 ACPI_STATUS
AcpiUtValidateResource(ACPI_WALK_STATE * WalkState,void * Aml,UINT8 * ReturnIndex)579 AcpiUtValidateResource (
580 ACPI_WALK_STATE *WalkState,
581 void *Aml,
582 UINT8 *ReturnIndex)
583 {
584 AML_RESOURCE *AmlResource;
585 UINT8 ResourceType;
586 UINT8 ResourceIndex;
587 ACPI_RS_LENGTH ResourceLength;
588 ACPI_RS_LENGTH MinimumResourceLength;
589
590
591 ACPI_FUNCTION_ENTRY ();
592
593
594 /*
595 * 1) Validate the ResourceType field (Byte 0)
596 */
597 ResourceType = ACPI_GET8 (Aml);
598
599 /*
600 * Byte 0 contains the descriptor name (Resource Type)
601 * Examine the large/small bit in the resource header
602 */
603 if (ResourceType & ACPI_RESOURCE_NAME_LARGE)
604 {
605 /* Verify the large resource type (name) against the max */
606
607 if (ResourceType > ACPI_RESOURCE_NAME_LARGE_MAX)
608 {
609 goto InvalidResource;
610 }
611
612 /*
613 * Large Resource Type -- bits 6:0 contain the name
614 * Translate range 0x80-0x8B to index range 0x10-0x1B
615 */
616 ResourceIndex = (UINT8) (ResourceType - 0x70);
617 }
618 else
619 {
620 /*
621 * Small Resource Type -- bits 6:3 contain the name
622 * Shift range to index range 0x00-0x0F
623 */
624 ResourceIndex = (UINT8)
625 ((ResourceType & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3);
626 }
627
628 /*
629 * Check validity of the resource type, via AcpiGbl_ResourceTypes.
630 * Zero indicates an invalid resource.
631 */
632 if (!AcpiGbl_ResourceTypes[ResourceIndex])
633 {
634 goto InvalidResource;
635 }
636
637 /*
638 * Validate the ResourceLength field. This ensures that the length
639 * is at least reasonable, and guarantees that it is non-zero.
640 */
641 ResourceLength = AcpiUtGetResourceLength (Aml);
642 MinimumResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex];
643
644 /* Validate based upon the type of resource - fixed length or variable */
645
646 switch (AcpiGbl_ResourceTypes[ResourceIndex])
647 {
648 case ACPI_FIXED_LENGTH:
649
650 /* Fixed length resource, length must match exactly */
651
652 if (ResourceLength != MinimumResourceLength)
653 {
654 goto BadResourceLength;
655 }
656 break;
657
658 case ACPI_VARIABLE_LENGTH:
659
660 /* Variable length resource, length must be at least the minimum */
661
662 if (ResourceLength < MinimumResourceLength)
663 {
664 goto BadResourceLength;
665 }
666 break;
667
668 case ACPI_SMALL_VARIABLE_LENGTH:
669
670 /* Small variable length resource, length can be (Min) or (Min-1) */
671
672 if ((ResourceLength > MinimumResourceLength) ||
673 (ResourceLength < (MinimumResourceLength - 1)))
674 {
675 goto BadResourceLength;
676 }
677 break;
678
679 default:
680
681 /* Shouldn't happen (because of validation earlier), but be sure */
682
683 goto InvalidResource;
684 }
685
686 AmlResource = ACPI_CAST_PTR (AML_RESOURCE, Aml);
687 if (ResourceType == ACPI_RESOURCE_NAME_SERIAL_BUS)
688 {
689 /* Validate the BusType field */
690
691 if ((AmlResource->CommonSerialBus.Type == 0) ||
692 (AmlResource->CommonSerialBus.Type > AML_RESOURCE_MAX_SERIALBUSTYPE))
693 {
694 if (WalkState)
695 {
696 ACPI_ERROR ((AE_INFO,
697 "Invalid/unsupported SerialBus resource descriptor: BusType 0x%2.2X",
698 AmlResource->CommonSerialBus.Type));
699 }
700 return (AE_AML_INVALID_RESOURCE_TYPE);
701 }
702 }
703
704 /* Optionally return the resource table index */
705
706 if (ReturnIndex)
707 {
708 *ReturnIndex = ResourceIndex;
709 }
710
711 return (AE_OK);
712
713
714 InvalidResource:
715
716 if (WalkState)
717 {
718 ACPI_ERROR ((AE_INFO,
719 "Invalid/unsupported resource descriptor: Type 0x%2.2X",
720 ResourceType));
721 }
722 return (AE_AML_INVALID_RESOURCE_TYPE);
723
724 BadResourceLength:
725
726 if (WalkState)
727 {
728 ACPI_ERROR ((AE_INFO,
729 "Invalid resource descriptor length: Type "
730 "0x%2.2X, Length 0x%4.4X, MinLength 0x%4.4X",
731 ResourceType, ResourceLength, MinimumResourceLength));
732 }
733 return (AE_AML_BAD_RESOURCE_LENGTH);
734 }
735
736
737 /*******************************************************************************
738 *
739 * FUNCTION: AcpiUtGetResourceType
740 *
741 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor
742 *
743 * RETURN: The Resource Type with no extraneous bits (except the
744 * Large/Small descriptor bit -- this is left alone)
745 *
746 * DESCRIPTION: Extract the Resource Type/Name from the first byte of
747 * a resource descriptor.
748 *
749 ******************************************************************************/
750
751 UINT8
AcpiUtGetResourceType(void * Aml)752 AcpiUtGetResourceType (
753 void *Aml)
754 {
755 ACPI_FUNCTION_ENTRY ();
756
757
758 /*
759 * Byte 0 contains the descriptor name (Resource Type)
760 * Examine the large/small bit in the resource header
761 */
762 if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE)
763 {
764 /* Large Resource Type -- bits 6:0 contain the name */
765
766 return (ACPI_GET8 (Aml));
767 }
768 else
769 {
770 /* Small Resource Type -- bits 6:3 contain the name */
771
772 return ((UINT8) (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_SMALL_MASK));
773 }
774 }
775
776
777 /*******************************************************************************
778 *
779 * FUNCTION: AcpiUtGetResourceLength
780 *
781 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor
782 *
783 * RETURN: Byte Length
784 *
785 * DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By
786 * definition, this does not include the size of the descriptor
787 * header or the length field itself.
788 *
789 ******************************************************************************/
790
791 UINT16
AcpiUtGetResourceLength(void * Aml)792 AcpiUtGetResourceLength (
793 void *Aml)
794 {
795 ACPI_RS_LENGTH ResourceLength;
796
797
798 ACPI_FUNCTION_ENTRY ();
799
800
801 /*
802 * Byte 0 contains the descriptor name (Resource Type)
803 * Examine the large/small bit in the resource header
804 */
805 if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE)
806 {
807 /* Large Resource type -- bytes 1-2 contain the 16-bit length */
808
809 ACPI_MOVE_16_TO_16 (&ResourceLength, ACPI_ADD_PTR (UINT8, Aml, 1));
810
811 }
812 else
813 {
814 /* Small Resource type -- bits 2:0 of byte 0 contain the length */
815
816 ResourceLength = (UINT16) (ACPI_GET8 (Aml) &
817 ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
818 }
819
820 return (ResourceLength);
821 }
822
823
824 /*******************************************************************************
825 *
826 * FUNCTION: AcpiUtGetResourceHeaderLength
827 *
828 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor
829 *
830 * RETURN: Length of the AML header (depends on large/small descriptor)
831 *
832 * DESCRIPTION: Get the length of the header for this resource.
833 *
834 ******************************************************************************/
835
836 UINT8
AcpiUtGetResourceHeaderLength(void * Aml)837 AcpiUtGetResourceHeaderLength (
838 void *Aml)
839 {
840 ACPI_FUNCTION_ENTRY ();
841
842
843 /* Examine the large/small bit in the resource header */
844
845 if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE)
846 {
847 return (sizeof (AML_RESOURCE_LARGE_HEADER));
848 }
849 else
850 {
851 return (sizeof (AML_RESOURCE_SMALL_HEADER));
852 }
853 }
854
855
856 /*******************************************************************************
857 *
858 * FUNCTION: AcpiUtGetDescriptorLength
859 *
860 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor
861 *
862 * RETURN: Byte length
863 *
864 * DESCRIPTION: Get the total byte length of a raw AML descriptor, including the
865 * length of the descriptor header and the length field itself.
866 * Used to walk descriptor lists.
867 *
868 ******************************************************************************/
869
870 UINT32
AcpiUtGetDescriptorLength(void * Aml)871 AcpiUtGetDescriptorLength (
872 void *Aml)
873 {
874 ACPI_FUNCTION_ENTRY ();
875
876
877 /*
878 * Get the Resource Length (does not include header length) and add
879 * the header length (depends on if this is a small or large resource)
880 */
881 return (AcpiUtGetResourceLength (Aml) +
882 AcpiUtGetResourceHeaderLength (Aml));
883 }
884
885
886 /*******************************************************************************
887 *
888 * FUNCTION: AcpiUtGetResourceEndTag
889 *
890 * PARAMETERS: ObjDesc - The resource template buffer object
891 * EndTag - Where the pointer to the EndTag is returned
892 *
893 * RETURN: Status, pointer to the end tag
894 *
895 * DESCRIPTION: Find the EndTag resource descriptor in an AML resource template
896 * Note: allows a buffer length of zero.
897 *
898 ******************************************************************************/
899
900 ACPI_STATUS
AcpiUtGetResourceEndTag(ACPI_OPERAND_OBJECT * ObjDesc,UINT8 ** EndTag)901 AcpiUtGetResourceEndTag (
902 ACPI_OPERAND_OBJECT *ObjDesc,
903 UINT8 **EndTag)
904 {
905 ACPI_STATUS Status;
906
907
908 ACPI_FUNCTION_TRACE (UtGetResourceEndTag);
909
910
911 /* Allow a buffer length of zero */
912
913 if (!ObjDesc->Buffer.Length)
914 {
915 *EndTag = ObjDesc->Buffer.Pointer;
916 return_ACPI_STATUS (AE_OK);
917 }
918
919 /* Validate the template and get a pointer to the EndTag */
920
921 Status = AcpiUtWalkAmlResources (NULL, ObjDesc->Buffer.Pointer,
922 ObjDesc->Buffer.Length, NULL, (void **) EndTag);
923
924 return_ACPI_STATUS (Status);
925 }
926