rscalc.c revision 193267
1/******************************************************************************* 2 * 3 * Module Name: rscalc - Calculate stream and list lengths 4 * 5 ******************************************************************************/ 6 7/****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2009, 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#define __RSCALC_C__ 117 118#include "acpi.h" 119#include "accommon.h" 120#include "acresrc.h" 121#include "acnamesp.h" 122 123 124#define _COMPONENT ACPI_RESOURCES 125 ACPI_MODULE_NAME ("rscalc") 126 127 128/* Local prototypes */ 129 130static UINT8 131AcpiRsCountSetBits ( 132 UINT16 BitField); 133 134static ACPI_RS_LENGTH 135AcpiRsStructOptionLength ( 136 ACPI_RESOURCE_SOURCE *ResourceSource); 137 138static UINT32 139AcpiRsStreamOptionLength ( 140 UINT32 ResourceLength, 141 UINT32 MinimumTotalLength); 142 143 144/******************************************************************************* 145 * 146 * FUNCTION: AcpiRsCountSetBits 147 * 148 * PARAMETERS: BitField - Field in which to count bits 149 * 150 * RETURN: Number of bits set within the field 151 * 152 * DESCRIPTION: Count the number of bits set in a resource field. Used for 153 * (Short descriptor) interrupt and DMA lists. 154 * 155 ******************************************************************************/ 156 157static UINT8 158AcpiRsCountSetBits ( 159 UINT16 BitField) 160{ 161 UINT8 BitsSet; 162 163 164 ACPI_FUNCTION_ENTRY (); 165 166 167 for (BitsSet = 0; BitField; BitsSet++) 168 { 169 /* Zero the least significant bit that is set */ 170 171 BitField &= (UINT16) (BitField - 1); 172 } 173 174 return (BitsSet); 175} 176 177 178/******************************************************************************* 179 * 180 * FUNCTION: AcpiRsStructOptionLength 181 * 182 * PARAMETERS: ResourceSource - Pointer to optional descriptor field 183 * 184 * RETURN: Status 185 * 186 * DESCRIPTION: Common code to handle optional ResourceSourceIndex and 187 * ResourceSource fields in some Large descriptors. Used during 188 * list-to-stream conversion 189 * 190 ******************************************************************************/ 191 192static ACPI_RS_LENGTH 193AcpiRsStructOptionLength ( 194 ACPI_RESOURCE_SOURCE *ResourceSource) 195{ 196 ACPI_FUNCTION_ENTRY (); 197 198 199 /* 200 * If the ResourceSource string is valid, return the size of the string 201 * (StringLength includes the NULL terminator) plus the size of the 202 * ResourceSourceIndex (1). 203 */ 204 if (ResourceSource->StringPtr) 205 { 206 return ((ACPI_RS_LENGTH) (ResourceSource->StringLength + 1)); 207 } 208 209 return (0); 210} 211 212 213/******************************************************************************* 214 * 215 * FUNCTION: AcpiRsStreamOptionLength 216 * 217 * PARAMETERS: ResourceLength - Length from the resource header 218 * MinimumTotalLength - Minimum length of this resource, before 219 * any optional fields. Includes header size 220 * 221 * RETURN: Length of optional string (0 if no string present) 222 * 223 * DESCRIPTION: Common code to handle optional ResourceSourceIndex and 224 * ResourceSource fields in some Large descriptors. Used during 225 * stream-to-list conversion 226 * 227 ******************************************************************************/ 228 229static UINT32 230AcpiRsStreamOptionLength ( 231 UINT32 ResourceLength, 232 UINT32 MinimumAmlResourceLength) 233{ 234 UINT32 StringLength = 0; 235 236 237 ACPI_FUNCTION_ENTRY (); 238 239 240 /* 241 * The ResourceSourceIndex and ResourceSource are optional elements of some 242 * Large-type resource descriptors. 243 */ 244 245 /* 246 * If the length of the actual resource descriptor is greater than the ACPI 247 * spec-defined minimum length, it means that a ResourceSourceIndex exists 248 * and is followed by a (required) null terminated string. The string length 249 * (including the null terminator) is the resource length minus the minimum 250 * length, minus one byte for the ResourceSourceIndex itself. 251 */ 252 if (ResourceLength > MinimumAmlResourceLength) 253 { 254 /* Compute the length of the optional string */ 255 256 StringLength = ResourceLength - MinimumAmlResourceLength - 1; 257 } 258 259 /* 260 * Round the length up to a multiple of the native word in order to 261 * guarantee that the entire resource descriptor is native word aligned 262 */ 263 return ((UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (StringLength)); 264} 265 266 267/******************************************************************************* 268 * 269 * FUNCTION: AcpiRsGetAmlLength 270 * 271 * PARAMETERS: Resource - Pointer to the resource linked list 272 * SizeNeeded - Where the required size is returned 273 * 274 * RETURN: Status 275 * 276 * DESCRIPTION: Takes a linked list of internal resource descriptors and 277 * calculates the size buffer needed to hold the corresponding 278 * external resource byte stream. 279 * 280 ******************************************************************************/ 281 282ACPI_STATUS 283AcpiRsGetAmlLength ( 284 ACPI_RESOURCE *Resource, 285 ACPI_SIZE *SizeNeeded) 286{ 287 ACPI_SIZE AmlSizeNeeded = 0; 288 ACPI_RS_LENGTH TotalSize; 289 290 291 ACPI_FUNCTION_TRACE (RsGetAmlLength); 292 293 294 /* Traverse entire list of internal resource descriptors */ 295 296 while (Resource) 297 { 298 /* Validate the descriptor type */ 299 300 if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) 301 { 302 return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); 303 } 304 305 /* Get the base size of the (external stream) resource descriptor */ 306 307 TotalSize = AcpiGbl_AmlResourceSizes [Resource->Type]; 308 309 /* 310 * Augment the base size for descriptors with optional and/or 311 * variable-length fields 312 */ 313 switch (Resource->Type) 314 { 315 case ACPI_RESOURCE_TYPE_IRQ: 316 317 /* Length can be 3 or 2 */ 318 319 if (Resource->Data.Irq.DescriptorLength == 2) 320 { 321 TotalSize--; 322 } 323 break; 324 325 326 case ACPI_RESOURCE_TYPE_START_DEPENDENT: 327 328 /* Length can be 1 or 0 */ 329 330 if (Resource->Data.Irq.DescriptorLength == 0) 331 { 332 TotalSize--; 333 } 334 break; 335 336 337 case ACPI_RESOURCE_TYPE_VENDOR: 338 /* 339 * Vendor Defined Resource: 340 * For a Vendor Specific resource, if the Length is between 1 and 7 341 * it will be created as a Small Resource data type, otherwise it 342 * is a Large Resource data type. 343 */ 344 if (Resource->Data.Vendor.ByteLength > 7) 345 { 346 /* Base size of a Large resource descriptor */ 347 348 TotalSize = sizeof (AML_RESOURCE_LARGE_HEADER); 349 } 350 351 /* Add the size of the vendor-specific data */ 352 353 TotalSize = (ACPI_RS_LENGTH) 354 (TotalSize + Resource->Data.Vendor.ByteLength); 355 break; 356 357 358 case ACPI_RESOURCE_TYPE_END_TAG: 359 /* 360 * End Tag: 361 * We are done -- return the accumulated total size. 362 */ 363 *SizeNeeded = AmlSizeNeeded + TotalSize; 364 365 /* Normal exit */ 366 367 return_ACPI_STATUS (AE_OK); 368 369 370 case ACPI_RESOURCE_TYPE_ADDRESS16: 371 /* 372 * 16-Bit Address Resource: 373 * Add the size of the optional ResourceSource info 374 */ 375 TotalSize = (ACPI_RS_LENGTH) 376 (TotalSize + AcpiRsStructOptionLength ( 377 &Resource->Data.Address16.ResourceSource)); 378 break; 379 380 381 case ACPI_RESOURCE_TYPE_ADDRESS32: 382 /* 383 * 32-Bit Address Resource: 384 * Add the size of the optional ResourceSource info 385 */ 386 TotalSize = (ACPI_RS_LENGTH) 387 (TotalSize + AcpiRsStructOptionLength ( 388 &Resource->Data.Address32.ResourceSource)); 389 break; 390 391 392 case ACPI_RESOURCE_TYPE_ADDRESS64: 393 /* 394 * 64-Bit Address Resource: 395 * Add the size of the optional ResourceSource info 396 */ 397 TotalSize = (ACPI_RS_LENGTH) 398 (TotalSize + AcpiRsStructOptionLength ( 399 &Resource->Data.Address64.ResourceSource)); 400 break; 401 402 403 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 404 /* 405 * Extended IRQ Resource: 406 * Add the size of each additional optional interrupt beyond the 407 * required 1 (4 bytes for each UINT32 interrupt number) 408 */ 409 TotalSize = (ACPI_RS_LENGTH) 410 (TotalSize + 411 ((Resource->Data.ExtendedIrq.InterruptCount - 1) * 4) + 412 413 /* Add the size of the optional ResourceSource info */ 414 415 AcpiRsStructOptionLength ( 416 &Resource->Data.ExtendedIrq.ResourceSource)); 417 break; 418 419 420 default: 421 break; 422 } 423 424 /* Update the total */ 425 426 AmlSizeNeeded += TotalSize; 427 428 /* Point to the next object */ 429 430 Resource = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, Resource->Length); 431 } 432 433 /* Did not find an EndTag resource descriptor */ 434 435 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 436} 437 438 439/******************************************************************************* 440 * 441 * FUNCTION: AcpiRsGetListLength 442 * 443 * PARAMETERS: AmlBuffer - Pointer to the resource byte stream 444 * AmlBufferLength - Size of AmlBuffer 445 * SizeNeeded - Where the size needed is returned 446 * 447 * RETURN: Status 448 * 449 * DESCRIPTION: Takes an external resource byte stream and calculates the size 450 * buffer needed to hold the corresponding internal resource 451 * descriptor linked list. 452 * 453 ******************************************************************************/ 454 455ACPI_STATUS 456AcpiRsGetListLength ( 457 UINT8 *AmlBuffer, 458 UINT32 AmlBufferLength, 459 ACPI_SIZE *SizeNeeded) 460{ 461 ACPI_STATUS Status; 462 UINT8 *EndAml; 463 UINT8 *Buffer; 464 UINT32 BufferSize; 465 UINT16 Temp16; 466 UINT16 ResourceLength; 467 UINT32 ExtraStructBytes; 468 UINT8 ResourceIndex; 469 UINT8 MinimumAmlResourceLength; 470 471 472 ACPI_FUNCTION_TRACE (RsGetListLength); 473 474 475 *SizeNeeded = 0; 476 EndAml = AmlBuffer + AmlBufferLength; 477 478 /* Walk the list of AML resource descriptors */ 479 480 while (AmlBuffer < EndAml) 481 { 482 /* Validate the Resource Type and Resource Length */ 483 484 Status = AcpiUtValidateResource (AmlBuffer, &ResourceIndex); 485 if (ACPI_FAILURE (Status)) 486 { 487 return_ACPI_STATUS (Status); 488 } 489 490 /* Get the resource length and base (minimum) AML size */ 491 492 ResourceLength = AcpiUtGetResourceLength (AmlBuffer); 493 MinimumAmlResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex]; 494 495 /* 496 * Augment the size for descriptors with optional 497 * and/or variable length fields 498 */ 499 ExtraStructBytes = 0; 500 Buffer = AmlBuffer + AcpiUtGetResourceHeaderLength (AmlBuffer); 501 502 switch (AcpiUtGetResourceType (AmlBuffer)) 503 { 504 case ACPI_RESOURCE_NAME_IRQ: 505 /* 506 * IRQ Resource: 507 * Get the number of bits set in the 16-bit IRQ mask 508 */ 509 ACPI_MOVE_16_TO_16 (&Temp16, Buffer); 510 ExtraStructBytes = AcpiRsCountSetBits (Temp16); 511 break; 512 513 514 case ACPI_RESOURCE_NAME_DMA: 515 /* 516 * DMA Resource: 517 * Get the number of bits set in the 8-bit DMA mask 518 */ 519 ExtraStructBytes = AcpiRsCountSetBits (*Buffer); 520 break; 521 522 523 case ACPI_RESOURCE_NAME_VENDOR_SMALL: 524 case ACPI_RESOURCE_NAME_VENDOR_LARGE: 525 /* 526 * Vendor Resource: 527 * Get the number of vendor data bytes 528 */ 529 ExtraStructBytes = ResourceLength; 530 break; 531 532 533 case ACPI_RESOURCE_NAME_END_TAG: 534 /* 535 * End Tag: 536 * This is the normal exit, add size of EndTag 537 */ 538 *SizeNeeded += ACPI_RS_SIZE_MIN; 539 return_ACPI_STATUS (AE_OK); 540 541 542 case ACPI_RESOURCE_NAME_ADDRESS32: 543 case ACPI_RESOURCE_NAME_ADDRESS16: 544 case ACPI_RESOURCE_NAME_ADDRESS64: 545 /* 546 * Address Resource: 547 * Add the size of the optional ResourceSource 548 */ 549 ExtraStructBytes = AcpiRsStreamOptionLength ( 550 ResourceLength, MinimumAmlResourceLength); 551 break; 552 553 554 case ACPI_RESOURCE_NAME_EXTENDED_IRQ: 555 /* 556 * Extended IRQ Resource: 557 * Using the InterruptTableLength, add 4 bytes for each additional 558 * interrupt. Note: at least one interrupt is required and is 559 * included in the minimum descriptor size (reason for the -1) 560 */ 561 ExtraStructBytes = (Buffer[1] - 1) * sizeof (UINT32); 562 563 /* Add the size of the optional ResourceSource */ 564 565 ExtraStructBytes += AcpiRsStreamOptionLength ( 566 ResourceLength - ExtraStructBytes, MinimumAmlResourceLength); 567 break; 568 569 570 default: 571 break; 572 } 573 574 /* 575 * Update the required buffer size for the internal descriptor structs 576 * 577 * Important: Round the size up for the appropriate alignment. This 578 * is a requirement on IA64. 579 */ 580 BufferSize = AcpiGbl_ResourceStructSizes[ResourceIndex] + 581 ExtraStructBytes; 582 BufferSize = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (BufferSize); 583 584 *SizeNeeded += BufferSize; 585 586 ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES, 587 "Type %.2X, AmlLength %.2X InternalLength %.2X\n", 588 AcpiUtGetResourceType (AmlBuffer), 589 AcpiUtGetDescriptorLength (AmlBuffer), BufferSize)); 590 591 /* 592 * Point to the next resource within the AML stream using the length 593 * contained in the resource descriptor header 594 */ 595 AmlBuffer += AcpiUtGetDescriptorLength (AmlBuffer); 596 } 597 598 /* Did not find an EndTag resource descriptor */ 599 600 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 601} 602 603 604/******************************************************************************* 605 * 606 * FUNCTION: AcpiRsGetPciRoutingTableLength 607 * 608 * PARAMETERS: PackageObject - Pointer to the package object 609 * BufferSizeNeeded - UINT32 pointer of the size buffer 610 * needed to properly return the 611 * parsed data 612 * 613 * RETURN: Status 614 * 615 * DESCRIPTION: Given a package representing a PCI routing table, this 616 * calculates the size of the corresponding linked list of 617 * descriptions. 618 * 619 ******************************************************************************/ 620 621ACPI_STATUS 622AcpiRsGetPciRoutingTableLength ( 623 ACPI_OPERAND_OBJECT *PackageObject, 624 ACPI_SIZE *BufferSizeNeeded) 625{ 626 UINT32 NumberOfElements; 627 ACPI_SIZE TempSizeNeeded = 0; 628 ACPI_OPERAND_OBJECT **TopObjectList; 629 UINT32 Index; 630 ACPI_OPERAND_OBJECT *PackageElement; 631 ACPI_OPERAND_OBJECT **SubObjectList; 632 BOOLEAN NameFound; 633 UINT32 TableIndex; 634 635 636 ACPI_FUNCTION_TRACE (RsGetPciRoutingTableLength); 637 638 639 NumberOfElements = PackageObject->Package.Count; 640 641 /* 642 * Calculate the size of the return buffer. 643 * The base size is the number of elements * the sizes of the 644 * structures. Additional space for the strings is added below. 645 * The minus one is to subtract the size of the UINT8 Source[1] 646 * member because it is added below. 647 * 648 * But each PRT_ENTRY structure has a pointer to a string and 649 * the size of that string must be found. 650 */ 651 TopObjectList = PackageObject->Package.Elements; 652 653 for (Index = 0; Index < NumberOfElements; Index++) 654 { 655 /* Dereference the sub-package */ 656 657 PackageElement = *TopObjectList; 658 659 /* We must have a valid Package object */ 660 661 if (!PackageElement || 662 (PackageElement->Common.Type != ACPI_TYPE_PACKAGE)) 663 { 664 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 665 } 666 667 /* 668 * The SubObjectList will now point to an array of the 669 * four IRQ elements: Address, Pin, Source and SourceIndex 670 */ 671 SubObjectList = PackageElement->Package.Elements; 672 673 /* Scan the IrqTableElements for the Source Name String */ 674 675 NameFound = FALSE; 676 677 for (TableIndex = 0; TableIndex < 4 && !NameFound; TableIndex++) 678 { 679 if (*SubObjectList && /* Null object allowed */ 680 681 ((ACPI_TYPE_STRING == 682 (*SubObjectList)->Common.Type) || 683 684 ((ACPI_TYPE_LOCAL_REFERENCE == 685 (*SubObjectList)->Common.Type) && 686 687 ((*SubObjectList)->Reference.Class == 688 ACPI_REFCLASS_NAME)))) 689 { 690 NameFound = TRUE; 691 } 692 else 693 { 694 /* Look at the next element */ 695 696 SubObjectList++; 697 } 698 } 699 700 TempSizeNeeded += (sizeof (ACPI_PCI_ROUTING_TABLE) - 4); 701 702 /* Was a String type found? */ 703 704 if (NameFound) 705 { 706 if ((*SubObjectList)->Common.Type == ACPI_TYPE_STRING) 707 { 708 /* 709 * The length String.Length field does not include the 710 * terminating NULL, add 1 711 */ 712 TempSizeNeeded += ((ACPI_SIZE) 713 (*SubObjectList)->String.Length + 1); 714 } 715 else 716 { 717 TempSizeNeeded += AcpiNsGetPathnameLength ( 718 (*SubObjectList)->Reference.Node); 719 } 720 } 721 else 722 { 723 /* 724 * If no name was found, then this is a NULL, which is 725 * translated as a UINT32 zero. 726 */ 727 TempSizeNeeded += sizeof (UINT32); 728 } 729 730 /* Round up the size since each element must be aligned */ 731 732 TempSizeNeeded = ACPI_ROUND_UP_TO_64BIT (TempSizeNeeded); 733 734 /* Point to the next ACPI_OPERAND_OBJECT */ 735 736 TopObjectList++; 737 } 738 739 /* 740 * Add an extra element to the end of the list, essentially a 741 * NULL terminator 742 */ 743 *BufferSizeNeeded = TempSizeNeeded + sizeof (ACPI_PCI_ROUTING_TABLE); 744 return_ACPI_STATUS (AE_OK); 745} 746