1 /*******************************************************************************
2 *
3 * Module Name: rscalc - Calculate stream and list lengths
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 #include "acnamesp.h"
48
49
50 #define _COMPONENT ACPI_RESOURCES
51 ACPI_MODULE_NAME ("rscalc")
52
53
54 /* Local prototypes */
55
56 static UINT8
57 AcpiRsCountSetBits (
58 UINT16 BitField);
59
60 static ACPI_RS_LENGTH
61 AcpiRsStructOptionLength (
62 ACPI_RESOURCE_SOURCE *ResourceSource);
63
64 static UINT32
65 AcpiRsStreamOptionLength (
66 UINT32 ResourceLength,
67 UINT32 MinimumTotalLength);
68
69
70 /*******************************************************************************
71 *
72 * FUNCTION: AcpiRsCountSetBits
73 *
74 * PARAMETERS: BitField - Field in which to count bits
75 *
76 * RETURN: Number of bits set within the field
77 *
78 * DESCRIPTION: Count the number of bits set in a resource field. Used for
79 * (Short descriptor) interrupt and DMA lists.
80 *
81 ******************************************************************************/
82
83 static UINT8
AcpiRsCountSetBits(UINT16 BitField)84 AcpiRsCountSetBits (
85 UINT16 BitField)
86 {
87 UINT8 BitsSet;
88
89
90 ACPI_FUNCTION_ENTRY ();
91
92
93 for (BitsSet = 0; BitField; BitsSet++)
94 {
95 /* Zero the least significant bit that is set */
96
97 BitField &= (UINT16) (BitField - 1);
98 }
99
100 return (BitsSet);
101 }
102
103
104 /*******************************************************************************
105 *
106 * FUNCTION: AcpiRsStructOptionLength
107 *
108 * PARAMETERS: ResourceSource - Pointer to optional descriptor field
109 *
110 * RETURN: Status
111 *
112 * DESCRIPTION: Common code to handle optional ResourceSourceIndex and
113 * ResourceSource fields in some Large descriptors. Used during
114 * list-to-stream conversion
115 *
116 ******************************************************************************/
117
118 static ACPI_RS_LENGTH
AcpiRsStructOptionLength(ACPI_RESOURCE_SOURCE * ResourceSource)119 AcpiRsStructOptionLength (
120 ACPI_RESOURCE_SOURCE *ResourceSource)
121 {
122 ACPI_FUNCTION_ENTRY ();
123
124
125 /*
126 * If the ResourceSource string is valid, return the size of the string
127 * (StringLength includes the NULL terminator) plus the size of the
128 * ResourceSourceIndex (1).
129 */
130 if (ResourceSource->StringPtr)
131 {
132 return ((ACPI_RS_LENGTH) (ResourceSource->StringLength + 1));
133 }
134
135 return (0);
136 }
137
138
139 /*******************************************************************************
140 *
141 * FUNCTION: AcpiRsStreamOptionLength
142 *
143 * PARAMETERS: ResourceLength - Length from the resource header
144 * MinimumTotalLength - Minimum length of this resource, before
145 * any optional fields. Includes header size
146 *
147 * RETURN: Length of optional string (0 if no string present)
148 *
149 * DESCRIPTION: Common code to handle optional ResourceSourceIndex and
150 * ResourceSource fields in some Large descriptors. Used during
151 * stream-to-list conversion
152 *
153 ******************************************************************************/
154
155 static UINT32
AcpiRsStreamOptionLength(UINT32 ResourceLength,UINT32 MinimumAmlResourceLength)156 AcpiRsStreamOptionLength (
157 UINT32 ResourceLength,
158 UINT32 MinimumAmlResourceLength)
159 {
160 UINT32 StringLength = 0;
161
162
163 ACPI_FUNCTION_ENTRY ();
164
165
166 /*
167 * The ResourceSourceIndex and ResourceSource are optional elements of
168 * some Large-type resource descriptors.
169 */
170
171 /*
172 * If the length of the actual resource descriptor is greater than the
173 * ACPI spec-defined minimum length, it means that a ResourceSourceIndex
174 * exists and is followed by a (required) null terminated string. The
175 * string length (including the null terminator) is the resource length
176 * minus the minimum length, minus one byte for the ResourceSourceIndex
177 * itself.
178 */
179 if (ResourceLength > MinimumAmlResourceLength)
180 {
181 /* Compute the length of the optional string */
182
183 StringLength = ResourceLength - MinimumAmlResourceLength - 1;
184 }
185
186 /*
187 * Round the length up to a multiple of the native word in order to
188 * guarantee that the entire resource descriptor is native word aligned
189 */
190 return ((UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (StringLength));
191 }
192
193
194 /*******************************************************************************
195 *
196 * FUNCTION: AcpiRsGetAmlLength
197 *
198 * PARAMETERS: Resource - Pointer to the resource linked list
199 * ResourceListSize - Size of the resource linked list
200 * SizeNeeded - Where the required size is returned
201 *
202 * RETURN: Status
203 *
204 * DESCRIPTION: Takes a linked list of internal resource descriptors and
205 * calculates the size buffer needed to hold the corresponding
206 * external resource byte stream.
207 *
208 ******************************************************************************/
209
210 ACPI_STATUS
AcpiRsGetAmlLength(ACPI_RESOURCE * Resource,ACPI_SIZE ResourceListSize,ACPI_SIZE * SizeNeeded)211 AcpiRsGetAmlLength (
212 ACPI_RESOURCE *Resource,
213 ACPI_SIZE ResourceListSize,
214 ACPI_SIZE *SizeNeeded)
215 {
216 ACPI_SIZE AmlSizeNeeded = 0;
217 ACPI_RESOURCE *ResourceEnd;
218 ACPI_RS_LENGTH TotalSize;
219
220
221 ACPI_FUNCTION_TRACE (RsGetAmlLength);
222
223
224 /* Traverse entire list of internal resource descriptors */
225
226 ResourceEnd = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, ResourceListSize);
227 while (Resource < ResourceEnd)
228 {
229 /* Validate the descriptor type */
230
231 if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
232 {
233 return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
234 }
235
236 /* Sanity check the length. It must not be zero, or we loop forever */
237
238 if (!Resource->Length)
239 {
240 return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
241 }
242
243 /* Get the base size of the (external stream) resource descriptor */
244
245 TotalSize = AcpiGbl_AmlResourceSizes [Resource->Type];
246
247 /*
248 * Augment the base size for descriptors with optional and/or
249 * variable-length fields
250 */
251 switch (Resource->Type)
252 {
253 case ACPI_RESOURCE_TYPE_IRQ:
254
255 /* Length can be 3 or 2 */
256
257 if (Resource->Data.Irq.DescriptorLength == 2)
258 {
259 TotalSize--;
260 }
261 break;
262
263
264 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
265
266 /* Length can be 1 or 0 */
267
268 if (Resource->Data.Irq.DescriptorLength == 0)
269 {
270 TotalSize--;
271 }
272 break;
273
274
275 case ACPI_RESOURCE_TYPE_VENDOR:
276 /*
277 * Vendor Defined Resource:
278 * For a Vendor Specific resource, if the Length is between 1 and 7
279 * it will be created as a Small Resource data type, otherwise it
280 * is a Large Resource data type.
281 */
282 if (Resource->Data.Vendor.ByteLength > 7)
283 {
284 /* Base size of a Large resource descriptor */
285
286 TotalSize = sizeof (AML_RESOURCE_LARGE_HEADER);
287 }
288
289 /* Add the size of the vendor-specific data */
290
291 TotalSize = (ACPI_RS_LENGTH)
292 (TotalSize + Resource->Data.Vendor.ByteLength);
293 break;
294
295
296 case ACPI_RESOURCE_TYPE_END_TAG:
297 /*
298 * End Tag:
299 * We are done -- return the accumulated total size.
300 */
301 *SizeNeeded = AmlSizeNeeded + TotalSize;
302
303 /* Normal exit */
304
305 return_ACPI_STATUS (AE_OK);
306
307
308 case ACPI_RESOURCE_TYPE_ADDRESS16:
309 /*
310 * 16-Bit Address Resource:
311 * Add the size of the optional ResourceSource info
312 */
313 TotalSize = (ACPI_RS_LENGTH) (TotalSize +
314 AcpiRsStructOptionLength (
315 &Resource->Data.Address16.ResourceSource));
316 break;
317
318
319 case ACPI_RESOURCE_TYPE_ADDRESS32:
320 /*
321 * 32-Bit Address Resource:
322 * Add the size of the optional ResourceSource info
323 */
324 TotalSize = (ACPI_RS_LENGTH) (TotalSize +
325 AcpiRsStructOptionLength (
326 &Resource->Data.Address32.ResourceSource));
327 break;
328
329
330 case ACPI_RESOURCE_TYPE_ADDRESS64:
331 /*
332 * 64-Bit Address Resource:
333 * Add the size of the optional ResourceSource info
334 */
335 TotalSize = (ACPI_RS_LENGTH) (TotalSize +
336 AcpiRsStructOptionLength (
337 &Resource->Data.Address64.ResourceSource));
338 break;
339
340
341 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
342 /*
343 * Extended IRQ Resource:
344 * Add the size of each additional optional interrupt beyond the
345 * required 1 (4 bytes for each UINT32 interrupt number)
346 */
347 TotalSize = (ACPI_RS_LENGTH) (TotalSize +
348 ((Resource->Data.ExtendedIrq.InterruptCount - 1) * 4) +
349
350 /* Add the size of the optional ResourceSource info */
351
352 AcpiRsStructOptionLength (
353 &Resource->Data.ExtendedIrq.ResourceSource));
354 break;
355
356
357 case ACPI_RESOURCE_TYPE_GPIO:
358
359 TotalSize = (ACPI_RS_LENGTH) (TotalSize +
360 (Resource->Data.Gpio.PinTableLength * 2) +
361 Resource->Data.Gpio.ResourceSource.StringLength +
362 Resource->Data.Gpio.VendorLength);
363
364 break;
365
366
367 case ACPI_RESOURCE_TYPE_SERIAL_BUS:
368
369 TotalSize = AcpiGbl_AmlResourceSerialBusSizes [
370 Resource->Data.CommonSerialBus.Type];
371
372 TotalSize = (ACPI_RS_LENGTH) (TotalSize +
373 Resource->Data.I2cSerialBus.ResourceSource.StringLength +
374 Resource->Data.I2cSerialBus.VendorLength);
375
376 break;
377
378 default:
379
380 break;
381 }
382
383 /* Update the total */
384
385 AmlSizeNeeded += TotalSize;
386
387 /* Point to the next object */
388
389 Resource = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, Resource->Length);
390 }
391
392 /* Did not find an EndTag resource descriptor */
393
394 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
395 }
396
397
398 /*******************************************************************************
399 *
400 * FUNCTION: AcpiRsGetListLength
401 *
402 * PARAMETERS: AmlBuffer - Pointer to the resource byte stream
403 * AmlBufferLength - Size of AmlBuffer
404 * SizeNeeded - Where the size needed is returned
405 *
406 * RETURN: Status
407 *
408 * DESCRIPTION: Takes an external resource byte stream and calculates the size
409 * buffer needed to hold the corresponding internal resource
410 * descriptor linked list.
411 *
412 ******************************************************************************/
413
414 ACPI_STATUS
AcpiRsGetListLength(UINT8 * AmlBuffer,UINT32 AmlBufferLength,ACPI_SIZE * SizeNeeded)415 AcpiRsGetListLength (
416 UINT8 *AmlBuffer,
417 UINT32 AmlBufferLength,
418 ACPI_SIZE *SizeNeeded)
419 {
420 ACPI_STATUS Status;
421 UINT8 *EndAml;
422 UINT8 *Buffer;
423 UINT32 BufferSize;
424 UINT16 Temp16;
425 UINT16 ResourceLength;
426 UINT32 ExtraStructBytes;
427 UINT8 ResourceIndex;
428 UINT8 MinimumAmlResourceLength;
429 AML_RESOURCE *AmlResource;
430
431
432 ACPI_FUNCTION_TRACE (RsGetListLength);
433
434
435 *SizeNeeded = ACPI_RS_SIZE_MIN; /* Minimum size is one EndTag */
436 EndAml = AmlBuffer + AmlBufferLength;
437
438 /* Walk the list of AML resource descriptors */
439
440 while (AmlBuffer < EndAml)
441 {
442 /* Validate the Resource Type and Resource Length */
443
444 Status = AcpiUtValidateResource (NULL, AmlBuffer, &ResourceIndex);
445 if (ACPI_FAILURE (Status))
446 {
447 /*
448 * Exit on failure. Cannot continue because the descriptor length
449 * may be bogus also.
450 */
451 return_ACPI_STATUS (Status);
452 }
453
454 AmlResource = (void *) AmlBuffer;
455
456 /* Get the resource length and base (minimum) AML size */
457
458 ResourceLength = AcpiUtGetResourceLength (AmlBuffer);
459 MinimumAmlResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex];
460
461 /*
462 * Augment the size for descriptors with optional
463 * and/or variable length fields
464 */
465 ExtraStructBytes = 0;
466 Buffer = AmlBuffer + AcpiUtGetResourceHeaderLength (AmlBuffer);
467
468 switch (AcpiUtGetResourceType (AmlBuffer))
469 {
470 case ACPI_RESOURCE_NAME_IRQ:
471 /*
472 * IRQ Resource:
473 * Get the number of bits set in the 16-bit IRQ mask
474 */
475 ACPI_MOVE_16_TO_16 (&Temp16, Buffer);
476 ExtraStructBytes = AcpiRsCountSetBits (Temp16);
477 break;
478
479
480 case ACPI_RESOURCE_NAME_DMA:
481 /*
482 * DMA Resource:
483 * Get the number of bits set in the 8-bit DMA mask
484 */
485 ExtraStructBytes = AcpiRsCountSetBits (*Buffer);
486 break;
487
488
489 case ACPI_RESOURCE_NAME_VENDOR_SMALL:
490 case ACPI_RESOURCE_NAME_VENDOR_LARGE:
491 /*
492 * Vendor Resource:
493 * Get the number of vendor data bytes
494 */
495 ExtraStructBytes = ResourceLength;
496
497 /*
498 * There is already one byte included in the minimum
499 * descriptor size. If there are extra struct bytes,
500 * subtract one from the count.
501 */
502 if (ExtraStructBytes)
503 {
504 ExtraStructBytes--;
505 }
506 break;
507
508
509 case ACPI_RESOURCE_NAME_END_TAG:
510 /*
511 * End Tag: This is the normal exit
512 */
513 return_ACPI_STATUS (AE_OK);
514
515
516 case ACPI_RESOURCE_NAME_ADDRESS32:
517 case ACPI_RESOURCE_NAME_ADDRESS16:
518 case ACPI_RESOURCE_NAME_ADDRESS64:
519 /*
520 * Address Resource:
521 * Add the size of the optional ResourceSource
522 */
523 ExtraStructBytes = AcpiRsStreamOptionLength (
524 ResourceLength, MinimumAmlResourceLength);
525 break;
526
527
528 case ACPI_RESOURCE_NAME_EXTENDED_IRQ:
529 /*
530 * Extended IRQ Resource:
531 * Using the InterruptTableLength, add 4 bytes for each additional
532 * interrupt. Note: at least one interrupt is required and is
533 * included in the minimum descriptor size (reason for the -1)
534 */
535 ExtraStructBytes = (Buffer[1] - 1) * sizeof (UINT32);
536
537 /* Add the size of the optional ResourceSource */
538
539 ExtraStructBytes += AcpiRsStreamOptionLength (
540 ResourceLength - ExtraStructBytes, MinimumAmlResourceLength);
541 break;
542
543 case ACPI_RESOURCE_NAME_GPIO:
544
545 /* Vendor data is optional */
546
547 if (AmlResource->Gpio.VendorLength)
548 {
549 ExtraStructBytes +=
550 AmlResource->Gpio.VendorOffset -
551 AmlResource->Gpio.PinTableOffset +
552 AmlResource->Gpio.VendorLength;
553 }
554 else
555 {
556 ExtraStructBytes +=
557 AmlResource->LargeHeader.ResourceLength +
558 sizeof (AML_RESOURCE_LARGE_HEADER) -
559 AmlResource->Gpio.PinTableOffset;
560 }
561 break;
562
563 case ACPI_RESOURCE_NAME_SERIAL_BUS:
564
565 MinimumAmlResourceLength = AcpiGbl_ResourceAmlSerialBusSizes[
566 AmlResource->CommonSerialBus.Type];
567 ExtraStructBytes +=
568 AmlResource->CommonSerialBus.ResourceLength -
569 MinimumAmlResourceLength;
570 break;
571
572 default:
573
574 break;
575 }
576
577 /*
578 * Update the required buffer size for the internal descriptor structs
579 *
580 * Important: Round the size up for the appropriate alignment. This
581 * is a requirement on IA64.
582 */
583 if (AcpiUtGetResourceType (AmlBuffer) ==
584 ACPI_RESOURCE_NAME_SERIAL_BUS)
585 {
586 BufferSize = AcpiGbl_ResourceStructSerialBusSizes[
587 AmlResource->CommonSerialBus.Type] + ExtraStructBytes;
588 }
589 else
590 {
591 BufferSize = AcpiGbl_ResourceStructSizes[ResourceIndex] +
592 ExtraStructBytes;
593 }
594
595 BufferSize = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (BufferSize);
596 *SizeNeeded += BufferSize;
597
598 ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES,
599 "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
600 AcpiUtGetResourceType (AmlBuffer),
601 AcpiUtGetDescriptorLength (AmlBuffer), BufferSize));
602
603 /*
604 * Point to the next resource within the AML stream using the length
605 * contained in the resource descriptor header
606 */
607 AmlBuffer += AcpiUtGetDescriptorLength (AmlBuffer);
608 }
609
610 /* Did not find an EndTag resource descriptor */
611
612 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
613 }
614
615
616 /*******************************************************************************
617 *
618 * FUNCTION: AcpiRsGetPciRoutingTableLength
619 *
620 * PARAMETERS: PackageObject - Pointer to the package object
621 * BufferSizeNeeded - UINT32 pointer of the size buffer
622 * needed to properly return the
623 * parsed data
624 *
625 * RETURN: Status
626 *
627 * DESCRIPTION: Given a package representing a PCI routing table, this
628 * calculates the size of the corresponding linked list of
629 * descriptions.
630 *
631 ******************************************************************************/
632
633 ACPI_STATUS
AcpiRsGetPciRoutingTableLength(ACPI_OPERAND_OBJECT * PackageObject,ACPI_SIZE * BufferSizeNeeded)634 AcpiRsGetPciRoutingTableLength (
635 ACPI_OPERAND_OBJECT *PackageObject,
636 ACPI_SIZE *BufferSizeNeeded)
637 {
638 UINT32 NumberOfElements;
639 ACPI_SIZE TempSizeNeeded = 0;
640 ACPI_OPERAND_OBJECT **TopObjectList;
641 UINT32 Index;
642 ACPI_OPERAND_OBJECT *PackageElement;
643 ACPI_OPERAND_OBJECT **SubObjectList;
644 BOOLEAN NameFound;
645 UINT32 TableIndex;
646
647
648 ACPI_FUNCTION_TRACE (RsGetPciRoutingTableLength);
649
650
651 NumberOfElements = PackageObject->Package.Count;
652
653 /*
654 * Calculate the size of the return buffer.
655 * The base size is the number of elements * the sizes of the
656 * structures. Additional space for the strings is added below.
657 * The minus one is to subtract the size of the UINT8 Source[1]
658 * member because it is added below.
659 *
660 * But each PRT_ENTRY structure has a pointer to a string and
661 * the size of that string must be found.
662 */
663 TopObjectList = PackageObject->Package.Elements;
664
665 for (Index = 0; Index < NumberOfElements; Index++)
666 {
667 /* Dereference the subpackage */
668
669 PackageElement = *TopObjectList;
670
671 /* We must have a valid Package object */
672
673 if (!PackageElement ||
674 (PackageElement->Common.Type != ACPI_TYPE_PACKAGE))
675 {
676 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
677 }
678
679 /*
680 * The SubObjectList will now point to an array of the
681 * four IRQ elements: Address, Pin, Source and SourceIndex
682 */
683 SubObjectList = PackageElement->Package.Elements;
684
685 /* Scan the IrqTableElements for the Source Name String */
686
687 NameFound = FALSE;
688
689 for (TableIndex = 0;
690 TableIndex < PackageElement->Package.Count && !NameFound;
691 TableIndex++)
692 {
693 if (*SubObjectList && /* Null object allowed */
694
695 ((ACPI_TYPE_STRING ==
696 (*SubObjectList)->Common.Type) ||
697
698 ((ACPI_TYPE_LOCAL_REFERENCE ==
699 (*SubObjectList)->Common.Type) &&
700
701 ((*SubObjectList)->Reference.Class ==
702 ACPI_REFCLASS_NAME))))
703 {
704 NameFound = TRUE;
705 }
706 else
707 {
708 /* Look at the next element */
709
710 SubObjectList++;
711 }
712 }
713
714 TempSizeNeeded += (sizeof (ACPI_PCI_ROUTING_TABLE) - 4);
715
716 /* Was a String type found? */
717
718 if (NameFound)
719 {
720 if ((*SubObjectList)->Common.Type == ACPI_TYPE_STRING)
721 {
722 /*
723 * The length String.Length field does not include the
724 * terminating NULL, add 1
725 */
726 TempSizeNeeded += ((ACPI_SIZE)
727 (*SubObjectList)->String.Length + 1);
728 }
729 else
730 {
731 TempSizeNeeded += AcpiNsGetPathnameLength (
732 (*SubObjectList)->Reference.Node);
733 }
734 }
735 else
736 {
737 /*
738 * If no name was found, then this is a NULL, which is
739 * translated as a UINT32 zero.
740 */
741 TempSizeNeeded += sizeof (UINT32);
742 }
743
744 /* Round up the size since each element must be aligned */
745
746 TempSizeNeeded = ACPI_ROUND_UP_TO_64BIT (TempSizeNeeded);
747
748 /* Point to the next ACPI_OPERAND_OBJECT */
749
750 TopObjectList++;
751 }
752
753 /*
754 * Add an extra element to the end of the list, essentially a
755 * NULL terminator
756 */
757 *BufferSizeNeeded = TempSizeNeeded + sizeof (ACPI_PCI_ROUTING_TABLE);
758 return_ACPI_STATUS (AE_OK);
759 }
760