nsrepair2.c revision 202771
1/****************************************************************************** 2 * 3 * Module Name: nsrepair2 - Repair for objects returned by specific 4 * predefined methods 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117#define __NSREPAIR2_C__ 118 119#include <contrib/dev/acpica/include/acpi.h> 120#include <contrib/dev/acpica/include/accommon.h> 121#include <contrib/dev/acpica/include/acnamesp.h> 122 123#define _COMPONENT ACPI_NAMESPACE 124 ACPI_MODULE_NAME ("nsrepair2") 125 126 127/* 128 * Information structure and handler for ACPI predefined names that can 129 * be repaired on a per-name basis. 130 */ 131typedef 132ACPI_STATUS (*ACPI_REPAIR_FUNCTION) ( 133 ACPI_PREDEFINED_DATA *Data, 134 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 135 136typedef struct acpi_repair_info 137{ 138 char Name[ACPI_NAME_SIZE]; 139 ACPI_REPAIR_FUNCTION RepairFunction; 140 141} ACPI_REPAIR_INFO; 142 143 144/* Local prototypes */ 145 146static const ACPI_REPAIR_INFO * 147AcpiNsMatchRepairableName ( 148 ACPI_NAMESPACE_NODE *Node); 149 150static ACPI_STATUS 151AcpiNsRepair_ALR ( 152 ACPI_PREDEFINED_DATA *Data, 153 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 154 155static ACPI_STATUS 156AcpiNsRepair_FDE ( 157 ACPI_PREDEFINED_DATA *Data, 158 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 159 160static ACPI_STATUS 161AcpiNsRepair_PSS ( 162 ACPI_PREDEFINED_DATA *Data, 163 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 164 165static ACPI_STATUS 166AcpiNsRepair_TSS ( 167 ACPI_PREDEFINED_DATA *Data, 168 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 169 170static ACPI_STATUS 171AcpiNsCheckSortedList ( 172 ACPI_PREDEFINED_DATA *Data, 173 ACPI_OPERAND_OBJECT *ReturnObject, 174 UINT32 ExpectedCount, 175 UINT32 SortIndex, 176 UINT8 SortDirection, 177 char *SortKeyName); 178 179static void 180AcpiNsSortList ( 181 ACPI_OPERAND_OBJECT **Elements, 182 UINT32 Count, 183 UINT32 Index, 184 UINT8 SortDirection); 185 186/* Values for SortDirection above */ 187 188#define ACPI_SORT_ASCENDING 0 189#define ACPI_SORT_DESCENDING 1 190 191 192/* 193 * This table contains the names of the predefined methods for which we can 194 * perform more complex repairs. 195 * 196 * As necessary: 197 * 198 * _ALR: Sort the list ascending by AmbientIlluminance 199 * _FDE: Convert Buffer of BYTEs to a Buffer of DWORDs 200 * _GTM: Convert Buffer of BYTEs to a Buffer of DWORDs 201 * _PSS: Sort the list descending by Power 202 * _TSS: Sort the list descending by Power 203 */ 204static const ACPI_REPAIR_INFO AcpiNsRepairableNames[] = 205{ 206 {"_ALR", AcpiNsRepair_ALR}, 207 {"_FDE", AcpiNsRepair_FDE}, 208 {"_GTM", AcpiNsRepair_FDE}, /* _GTM has same repair as _FDE */ 209 {"_PSS", AcpiNsRepair_PSS}, 210 {"_TSS", AcpiNsRepair_TSS}, 211 {{0,0,0,0}, NULL} /* Table terminator */ 212}; 213 214 215#define ACPI_FDE_FIELD_COUNT 5 216#define ACPI_FDE_BYTE_BUFFER_SIZE 5 217#define ACPI_FDE_DWORD_BUFFER_SIZE (ACPI_FDE_FIELD_COUNT * sizeof (UINT32)) 218 219 220/****************************************************************************** 221 * 222 * FUNCTION: AcpiNsComplexRepairs 223 * 224 * PARAMETERS: Data - Pointer to validation data structure 225 * Node - Namespace node for the method/object 226 * ValidateStatus - Original status of earlier validation 227 * ReturnObjectPtr - Pointer to the object returned from the 228 * evaluation of a method or object 229 * 230 * RETURN: Status. AE_OK if repair was successful. If name is not 231 * matched, ValidateStatus is returned. 232 * 233 * DESCRIPTION: Attempt to repair/convert a return object of a type that was 234 * not expected. 235 * 236 *****************************************************************************/ 237 238ACPI_STATUS 239AcpiNsComplexRepairs ( 240 ACPI_PREDEFINED_DATA *Data, 241 ACPI_NAMESPACE_NODE *Node, 242 ACPI_STATUS ValidateStatus, 243 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 244{ 245 const ACPI_REPAIR_INFO *Predefined; 246 ACPI_STATUS Status; 247 248 249 /* Check if this name is in the list of repairable names */ 250 251 Predefined = AcpiNsMatchRepairableName (Node); 252 if (!Predefined) 253 { 254 return (ValidateStatus); 255 } 256 257 Status = Predefined->RepairFunction (Data, ReturnObjectPtr); 258 return (Status); 259} 260 261 262/****************************************************************************** 263 * 264 * FUNCTION: AcpiNsMatchRepairableName 265 * 266 * PARAMETERS: Node - Namespace node for the method/object 267 * 268 * RETURN: Pointer to entry in repair table. NULL indicates not found. 269 * 270 * DESCRIPTION: Check an object name against the repairable object list. 271 * 272 *****************************************************************************/ 273 274static const ACPI_REPAIR_INFO * 275AcpiNsMatchRepairableName ( 276 ACPI_NAMESPACE_NODE *Node) 277{ 278 const ACPI_REPAIR_INFO *ThisName; 279 280 281 /* Search info table for a repairable predefined method/object name */ 282 283 ThisName = AcpiNsRepairableNames; 284 while (ThisName->RepairFunction) 285 { 286 if (ACPI_COMPARE_NAME (Node->Name.Ascii, ThisName->Name)) 287 { 288 return (ThisName); 289 } 290 ThisName++; 291 } 292 293 return (NULL); /* Not found */ 294} 295 296 297/****************************************************************************** 298 * 299 * FUNCTION: AcpiNsRepair_ALR 300 * 301 * PARAMETERS: Data - Pointer to validation data structure 302 * ReturnObjectPtr - Pointer to the object returned from the 303 * evaluation of a method or object 304 * 305 * RETURN: Status. AE_OK if object is OK or was repaired successfully 306 * 307 * DESCRIPTION: Repair for the _ALR object. If necessary, sort the object list 308 * ascending by the ambient illuminance values. 309 * 310 *****************************************************************************/ 311 312static ACPI_STATUS 313AcpiNsRepair_ALR ( 314 ACPI_PREDEFINED_DATA *Data, 315 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 316{ 317 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 318 ACPI_STATUS Status; 319 320 321 Status = AcpiNsCheckSortedList (Data, ReturnObject, 2, 1, 322 ACPI_SORT_ASCENDING, "AmbientIlluminance"); 323 324 return (Status); 325} 326 327 328/****************************************************************************** 329 * 330 * FUNCTION: AcpiNsRepair_FDE 331 * 332 * PARAMETERS: Data - Pointer to validation data structure 333 * ReturnObjectPtr - Pointer to the object returned from the 334 * evaluation of a method or object 335 * 336 * RETURN: Status. AE_OK if object is OK or was repaired successfully 337 * 338 * DESCRIPTION: Repair for the _FDE and _GTM objects. The expected return 339 * value is a Buffer of 5 DWORDs. This function repairs a common 340 * problem where the return value is a Buffer of BYTEs, not 341 * DWORDs. 342 * 343 *****************************************************************************/ 344 345static ACPI_STATUS 346AcpiNsRepair_FDE ( 347 ACPI_PREDEFINED_DATA *Data, 348 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 349{ 350 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 351 ACPI_OPERAND_OBJECT *BufferObject; 352 UINT8 *ByteBuffer; 353 UINT32 *DwordBuffer; 354 UINT32 i; 355 356 357 ACPI_FUNCTION_NAME (NsRepair_FDE); 358 359 360 switch (ReturnObject->Common.Type) 361 { 362 case ACPI_TYPE_BUFFER: 363 364 /* This is the expected type. Length should be (at least) 5 DWORDs */ 365 366 if (ReturnObject->Buffer.Length >= ACPI_FDE_DWORD_BUFFER_SIZE) 367 { 368 return (AE_OK); 369 } 370 371 /* We can only repair if we have exactly 5 BYTEs */ 372 373 if (ReturnObject->Buffer.Length != ACPI_FDE_BYTE_BUFFER_SIZE) 374 { 375 ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags, 376 "Incorrect return buffer length %u, expected %u", 377 ReturnObject->Buffer.Length, ACPI_FDE_DWORD_BUFFER_SIZE)); 378 379 return (AE_AML_OPERAND_TYPE); 380 } 381 382 /* Create the new (larger) buffer object */ 383 384 BufferObject = AcpiUtCreateBufferObject (ACPI_FDE_DWORD_BUFFER_SIZE); 385 if (!BufferObject) 386 { 387 return (AE_NO_MEMORY); 388 } 389 390 /* Expand each byte to a DWORD */ 391 392 ByteBuffer = ReturnObject->Buffer.Pointer; 393 DwordBuffer = ACPI_CAST_PTR (UINT32, BufferObject->Buffer.Pointer); 394 395 for (i = 0; i < ACPI_FDE_FIELD_COUNT; i++) 396 { 397 *DwordBuffer = (UINT32) *ByteBuffer; 398 DwordBuffer++; 399 ByteBuffer++; 400 } 401 402 ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, 403 "%s Expanded Byte Buffer to expected DWord Buffer\n", 404 Data->Pathname)); 405 break; 406 407 default: 408 return (AE_AML_OPERAND_TYPE); 409 } 410 411 /* Delete the original return object, return the new buffer object */ 412 413 AcpiUtRemoveReference (ReturnObject); 414 *ReturnObjectPtr = BufferObject; 415 416 Data->Flags |= ACPI_OBJECT_REPAIRED; 417 return (AE_OK); 418} 419 420 421/****************************************************************************** 422 * 423 * FUNCTION: AcpiNsRepair_TSS 424 * 425 * PARAMETERS: Data - Pointer to validation data structure 426 * ReturnObjectPtr - Pointer to the object returned from the 427 * evaluation of a method or object 428 * 429 * RETURN: Status. AE_OK if object is OK or was repaired successfully 430 * 431 * DESCRIPTION: Repair for the _TSS object. If necessary, sort the object list 432 * descending by the power dissipation values. 433 * 434 *****************************************************************************/ 435 436static ACPI_STATUS 437AcpiNsRepair_TSS ( 438 ACPI_PREDEFINED_DATA *Data, 439 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 440{ 441 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 442 ACPI_STATUS Status; 443 444 445 Status = AcpiNsCheckSortedList (Data, ReturnObject, 5, 1, 446 ACPI_SORT_DESCENDING, "PowerDissipation"); 447 448 return (Status); 449} 450 451 452/****************************************************************************** 453 * 454 * FUNCTION: AcpiNsRepair_PSS 455 * 456 * PARAMETERS: Data - Pointer to validation data structure 457 * ReturnObjectPtr - Pointer to the object returned from the 458 * evaluation of a method or object 459 * 460 * RETURN: Status. AE_OK if object is OK or was repaired successfully 461 * 462 * DESCRIPTION: Repair for the _PSS object. If necessary, sort the object list 463 * by the CPU frequencies. Check that the power dissipation values 464 * are all proportional to CPU frequency (i.e., sorting by 465 * frequency should be the same as sorting by power.) 466 * 467 *****************************************************************************/ 468 469static ACPI_STATUS 470AcpiNsRepair_PSS ( 471 ACPI_PREDEFINED_DATA *Data, 472 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 473{ 474 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 475 ACPI_OPERAND_OBJECT **OuterElements; 476 UINT32 OuterElementCount; 477 ACPI_OPERAND_OBJECT **Elements; 478 ACPI_OPERAND_OBJECT *ObjDesc; 479 UINT32 PreviousValue; 480 ACPI_STATUS Status; 481 UINT32 i; 482 483 484 /* 485 * Entries (sub-packages) in the _PSS Package must be sorted by power 486 * dissipation, in descending order. If it appears that the list is 487 * incorrectly sorted, sort it. We sort by CpuFrequency, since this 488 * should be proportional to the power. 489 */ 490 Status =AcpiNsCheckSortedList (Data, ReturnObject, 6, 0, 491 ACPI_SORT_DESCENDING, "CpuFrequency"); 492 if (ACPI_FAILURE (Status)) 493 { 494 return (Status); 495 } 496 497 /* 498 * We now know the list is correctly sorted by CPU frequency. Check if 499 * the power dissipation values are proportional. 500 */ 501 PreviousValue = ACPI_UINT32_MAX; 502 OuterElements = ReturnObject->Package.Elements; 503 OuterElementCount = ReturnObject->Package.Count; 504 505 for (i = 0; i < OuterElementCount; i++) 506 { 507 Elements = (*OuterElements)->Package.Elements; 508 ObjDesc = Elements[1]; /* Index1 = PowerDissipation */ 509 510 if ((UINT32) ObjDesc->Integer.Value > PreviousValue) 511 { 512 ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags, 513 "SubPackage[%u,%u] - suspicious power dissipation values", 514 i-1, i)); 515 } 516 517 PreviousValue = (UINT32) ObjDesc->Integer.Value; 518 OuterElements++; 519 } 520 521 return (AE_OK); 522} 523 524 525/****************************************************************************** 526 * 527 * FUNCTION: AcpiNsCheckSortedList 528 * 529 * PARAMETERS: Data - Pointer to validation data structure 530 * ReturnObject - Pointer to the top-level returned object 531 * ExpectedCount - Minimum length of each sub-package 532 * SortIndex - Sub-package entry to sort on 533 * SortDirection - Ascending or descending 534 * SortKeyName - Name of the SortIndex field 535 * 536 * RETURN: Status. AE_OK if the list is valid and is sorted correctly or 537 * has been repaired by sorting the list. 538 * 539 * DESCRIPTION: Check if the package list is valid and sorted correctly by the 540 * SortIndex. If not, then sort the list. 541 * 542 *****************************************************************************/ 543 544static ACPI_STATUS 545AcpiNsCheckSortedList ( 546 ACPI_PREDEFINED_DATA *Data, 547 ACPI_OPERAND_OBJECT *ReturnObject, 548 UINT32 ExpectedCount, 549 UINT32 SortIndex, 550 UINT8 SortDirection, 551 char *SortKeyName) 552{ 553 UINT32 OuterElementCount; 554 ACPI_OPERAND_OBJECT **OuterElements; 555 ACPI_OPERAND_OBJECT **Elements; 556 ACPI_OPERAND_OBJECT *ObjDesc; 557 UINT32 i; 558 UINT32 PreviousValue; 559 560 561 ACPI_FUNCTION_NAME (NsCheckSortedList); 562 563 564 /* The top-level object must be a package */ 565 566 if (ReturnObject->Common.Type != ACPI_TYPE_PACKAGE) 567 { 568 return (AE_AML_OPERAND_TYPE); 569 } 570 571 /* 572 * NOTE: assumes list of sub-packages contains no NULL elements. 573 * Any NULL elements should have been removed by earlier call 574 * to AcpiNsRemoveNullElements. 575 */ 576 OuterElements = ReturnObject->Package.Elements; 577 OuterElementCount = ReturnObject->Package.Count; 578 if (!OuterElementCount) 579 { 580 return (AE_AML_PACKAGE_LIMIT); 581 } 582 583 PreviousValue = 0; 584 if (SortDirection == ACPI_SORT_DESCENDING) 585 { 586 PreviousValue = ACPI_UINT32_MAX; 587 } 588 589 /* Examine each subpackage */ 590 591 for (i = 0; i < OuterElementCount; i++) 592 { 593 /* Each element of the top-level package must also be a package */ 594 595 if ((*OuterElements)->Common.Type != ACPI_TYPE_PACKAGE) 596 { 597 return (AE_AML_OPERAND_TYPE); 598 } 599 600 /* Each sub-package must have the minimum length */ 601 602 if ((*OuterElements)->Package.Count < ExpectedCount) 603 { 604 return (AE_AML_PACKAGE_LIMIT); 605 } 606 607 Elements = (*OuterElements)->Package.Elements; 608 ObjDesc = Elements[SortIndex]; 609 610 if (ObjDesc->Common.Type != ACPI_TYPE_INTEGER) 611 { 612 return (AE_AML_OPERAND_TYPE); 613 } 614 615 /* 616 * The list must be sorted in the specified order. If we detect a 617 * discrepancy, sort the entire list. 618 */ 619 if (((SortDirection == ACPI_SORT_ASCENDING) && 620 (ObjDesc->Integer.Value < PreviousValue)) || 621 ((SortDirection == ACPI_SORT_DESCENDING) && 622 (ObjDesc->Integer.Value > PreviousValue))) 623 { 624 AcpiNsSortList (ReturnObject->Package.Elements, 625 OuterElementCount, SortIndex, SortDirection); 626 627 Data->Flags |= ACPI_OBJECT_REPAIRED; 628 629 ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, 630 "%s: Repaired unsorted list - now sorted by %s\n", 631 Data->Pathname, SortKeyName)); 632 return (AE_OK); 633 } 634 635 PreviousValue = (UINT32) ObjDesc->Integer.Value; 636 OuterElements++; 637 } 638 639 return (AE_OK); 640} 641 642 643/****************************************************************************** 644 * 645 * FUNCTION: AcpiNsSortList 646 * 647 * PARAMETERS: Elements - Package object element list 648 * Count - Element count for above 649 * Index - Sort by which package element 650 * SortDirection - Ascending or Descending sort 651 * 652 * RETURN: None 653 * 654 * DESCRIPTION: Sort the objects that are in a package element list. 655 * 656 * NOTE: Assumes that all NULL elements have been removed from the package, 657 * and that all elements have been verified to be of type Integer. 658 * 659 *****************************************************************************/ 660 661static void 662AcpiNsSortList ( 663 ACPI_OPERAND_OBJECT **Elements, 664 UINT32 Count, 665 UINT32 Index, 666 UINT8 SortDirection) 667{ 668 ACPI_OPERAND_OBJECT *ObjDesc1; 669 ACPI_OPERAND_OBJECT *ObjDesc2; 670 ACPI_OPERAND_OBJECT *TempObj; 671 UINT32 i; 672 UINT32 j; 673 674 675 /* Simple bubble sort */ 676 677 for (i = 1; i < Count; i++) 678 { 679 for (j = (Count - 1); j >= i; j--) 680 { 681 ObjDesc1 = Elements[j-1]->Package.Elements[Index]; 682 ObjDesc2 = Elements[j]->Package.Elements[Index]; 683 684 if (((SortDirection == ACPI_SORT_ASCENDING) && 685 (ObjDesc1->Integer.Value > ObjDesc2->Integer.Value)) || 686 687 ((SortDirection == ACPI_SORT_DESCENDING) && 688 (ObjDesc1->Integer.Value < ObjDesc2->Integer.Value))) 689 { 690 TempObj = Elements[j-1]; 691 Elements[j-1] = Elements[j]; 692 Elements[j] = TempObj; 693 } 694 } 695 } 696} 697