1 /****************************************************************************** 2 * 3 * Module Name: utxface - External interfaces, miscellaneous utility functions 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2016, 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 EXPORT_ACPI_INTERFACES 117 118 #include "acpi.h" 119 #include "accommon.h" 120 #include "acdebug.h" 121 122 #define _COMPONENT ACPI_UTILITIES 123 ACPI_MODULE_NAME ("utxface") 124 125 126 /******************************************************************************* 127 * 128 * FUNCTION: AcpiTerminate 129 * 130 * PARAMETERS: None 131 * 132 * RETURN: Status 133 * 134 * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources. 135 * 136 ******************************************************************************/ 137 138 ACPI_STATUS ACPI_INIT_FUNCTION 139 AcpiTerminate ( 140 void) 141 { 142 ACPI_STATUS Status; 143 144 145 ACPI_FUNCTION_TRACE (AcpiTerminate); 146 147 148 /* Shutdown and free all resources */ 149 150 AcpiUtSubsystemShutdown (); 151 152 /* Free the mutex objects */ 153 154 AcpiUtMutexTerminate (); 155 156 /* Now we can shutdown the OS-dependent layer */ 157 158 Status = AcpiOsTerminate (); 159 return_ACPI_STATUS (Status); 160 } 161 162 ACPI_EXPORT_SYMBOL_INIT (AcpiTerminate) 163 164 165 #ifndef ACPI_ASL_COMPILER 166 /******************************************************************************* 167 * 168 * FUNCTION: AcpiSubsystemStatus 169 * 170 * PARAMETERS: None 171 * 172 * RETURN: Status of the ACPI subsystem 173 * 174 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this 175 * before making any other calls, to ensure the subsystem 176 * initialized successfully. 177 * 178 ******************************************************************************/ 179 180 ACPI_STATUS 181 AcpiSubsystemStatus ( 182 void) 183 { 184 185 if (AcpiGbl_StartupFlags & ACPI_INITIALIZED_OK) 186 { 187 return (AE_OK); 188 } 189 else 190 { 191 return (AE_ERROR); 192 } 193 } 194 195 ACPI_EXPORT_SYMBOL (AcpiSubsystemStatus) 196 197 198 /******************************************************************************* 199 * 200 * FUNCTION: AcpiGetSystemInfo 201 * 202 * PARAMETERS: OutBuffer - A buffer to receive the resources for the 203 * device 204 * 205 * RETURN: Status - the status of the call 206 * 207 * DESCRIPTION: This function is called to get information about the current 208 * state of the ACPI subsystem. It will return system information 209 * in the OutBuffer. 210 * 211 * If the function fails an appropriate status will be returned 212 * and the value of OutBuffer is undefined. 213 * 214 ******************************************************************************/ 215 216 ACPI_STATUS 217 AcpiGetSystemInfo ( 218 ACPI_BUFFER *OutBuffer) 219 { 220 ACPI_SYSTEM_INFO *InfoPtr; 221 ACPI_STATUS Status; 222 223 224 ACPI_FUNCTION_TRACE (AcpiGetSystemInfo); 225 226 227 /* Parameter validation */ 228 229 Status = AcpiUtValidateBuffer (OutBuffer); 230 if (ACPI_FAILURE (Status)) 231 { 232 return_ACPI_STATUS (Status); 233 } 234 235 /* Validate/Allocate/Clear caller buffer */ 236 237 Status = AcpiUtInitializeBuffer (OutBuffer, sizeof (ACPI_SYSTEM_INFO)); 238 if (ACPI_FAILURE (Status)) 239 { 240 return_ACPI_STATUS (Status); 241 } 242 243 /* 244 * Populate the return buffer 245 */ 246 InfoPtr = (ACPI_SYSTEM_INFO *) OutBuffer->Pointer; 247 InfoPtr->AcpiCaVersion = ACPI_CA_VERSION; 248 249 /* System flags (ACPI capabilities) */ 250 251 InfoPtr->Flags = ACPI_SYS_MODE_ACPI; 252 253 /* Timer resolution - 24 or 32 bits */ 254 255 if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 256 { 257 InfoPtr->TimerResolution = 24; 258 } 259 else 260 { 261 InfoPtr->TimerResolution = 32; 262 } 263 264 /* Clear the reserved fields */ 265 266 InfoPtr->Reserved1 = 0; 267 InfoPtr->Reserved2 = 0; 268 269 /* Current debug levels */ 270 271 InfoPtr->DebugLayer = AcpiDbgLayer; 272 InfoPtr->DebugLevel = AcpiDbgLevel; 273 274 return_ACPI_STATUS (AE_OK); 275 } 276 277 ACPI_EXPORT_SYMBOL (AcpiGetSystemInfo) 278 279 280 /******************************************************************************* 281 * 282 * FUNCTION: AcpiGetStatistics 283 * 284 * PARAMETERS: Stats - Where the statistics are returned 285 * 286 * RETURN: Status - the status of the call 287 * 288 * DESCRIPTION: Get the contents of the various system counters 289 * 290 ******************************************************************************/ 291 292 ACPI_STATUS 293 AcpiGetStatistics ( 294 ACPI_STATISTICS *Stats) 295 { 296 ACPI_FUNCTION_TRACE (AcpiGetStatistics); 297 298 299 /* Parameter validation */ 300 301 if (!Stats) 302 { 303 return_ACPI_STATUS (AE_BAD_PARAMETER); 304 } 305 306 /* Various interrupt-based event counters */ 307 308 Stats->SciCount = AcpiSciCount; 309 Stats->GpeCount = AcpiGpeCount; 310 311 memcpy (Stats->FixedEventCount, AcpiFixedEventCount, 312 sizeof (AcpiFixedEventCount)); 313 314 /* Other counters */ 315 316 Stats->MethodCount = AcpiMethodCount; 317 return_ACPI_STATUS (AE_OK); 318 } 319 320 ACPI_EXPORT_SYMBOL (AcpiGetStatistics) 321 322 323 /***************************************************************************** 324 * 325 * FUNCTION: AcpiInstallInitializationHandler 326 * 327 * PARAMETERS: Handler - Callback procedure 328 * Function - Not (currently) used, see below 329 * 330 * RETURN: Status 331 * 332 * DESCRIPTION: Install an initialization handler 333 * 334 * TBD: When a second function is added, must save the Function also. 335 * 336 ****************************************************************************/ 337 338 ACPI_STATUS 339 AcpiInstallInitializationHandler ( 340 ACPI_INIT_HANDLER Handler, 341 UINT32 Function) 342 { 343 344 if (!Handler) 345 { 346 return (AE_BAD_PARAMETER); 347 } 348 349 if (AcpiGbl_InitHandler) 350 { 351 return (AE_ALREADY_EXISTS); 352 } 353 354 AcpiGbl_InitHandler = Handler; 355 return (AE_OK); 356 } 357 358 ACPI_EXPORT_SYMBOL (AcpiInstallInitializationHandler) 359 360 361 /***************************************************************************** 362 * 363 * FUNCTION: AcpiPurgeCachedObjects 364 * 365 * PARAMETERS: None 366 * 367 * RETURN: Status 368 * 369 * DESCRIPTION: Empty all caches (delete the cached objects) 370 * 371 ****************************************************************************/ 372 373 ACPI_STATUS 374 AcpiPurgeCachedObjects ( 375 void) 376 { 377 ACPI_FUNCTION_TRACE (AcpiPurgeCachedObjects); 378 379 380 (void) AcpiOsPurgeCache (AcpiGbl_StateCache); 381 (void) AcpiOsPurgeCache (AcpiGbl_OperandCache); 382 (void) AcpiOsPurgeCache (AcpiGbl_PsNodeCache); 383 (void) AcpiOsPurgeCache (AcpiGbl_PsNodeExtCache); 384 385 return_ACPI_STATUS (AE_OK); 386 } 387 388 ACPI_EXPORT_SYMBOL (AcpiPurgeCachedObjects) 389 390 391 /***************************************************************************** 392 * 393 * FUNCTION: AcpiInstallInterface 394 * 395 * PARAMETERS: InterfaceName - The interface to install 396 * 397 * RETURN: Status 398 * 399 * DESCRIPTION: Install an _OSI interface to the global list 400 * 401 ****************************************************************************/ 402 403 ACPI_STATUS 404 AcpiInstallInterface ( 405 ACPI_STRING InterfaceName) 406 { 407 ACPI_STATUS Status; 408 ACPI_INTERFACE_INFO *InterfaceInfo; 409 410 411 /* Parameter validation */ 412 413 if (!InterfaceName || (strlen (InterfaceName) == 0)) 414 { 415 return (AE_BAD_PARAMETER); 416 } 417 418 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 419 if (ACPI_FAILURE (Status)) 420 { 421 return (Status); 422 } 423 424 /* Check if the interface name is already in the global list */ 425 426 InterfaceInfo = AcpiUtGetInterface (InterfaceName); 427 if (InterfaceInfo) 428 { 429 /* 430 * The interface already exists in the list. This is OK if the 431 * interface has been marked invalid -- just clear the bit. 432 */ 433 if (InterfaceInfo->Flags & ACPI_OSI_INVALID) 434 { 435 InterfaceInfo->Flags &= ~ACPI_OSI_INVALID; 436 Status = AE_OK; 437 } 438 else 439 { 440 Status = AE_ALREADY_EXISTS; 441 } 442 } 443 else 444 { 445 /* New interface name, install into the global list */ 446 447 Status = AcpiUtInstallInterface (InterfaceName); 448 } 449 450 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 451 return (Status); 452 } 453 454 ACPI_EXPORT_SYMBOL (AcpiInstallInterface) 455 456 457 /***************************************************************************** 458 * 459 * FUNCTION: AcpiRemoveInterface 460 * 461 * PARAMETERS: InterfaceName - The interface to remove 462 * 463 * RETURN: Status 464 * 465 * DESCRIPTION: Remove an _OSI interface from the global list 466 * 467 ****************************************************************************/ 468 469 ACPI_STATUS 470 AcpiRemoveInterface ( 471 ACPI_STRING InterfaceName) 472 { 473 ACPI_STATUS Status; 474 475 476 /* Parameter validation */ 477 478 if (!InterfaceName || (strlen (InterfaceName) == 0)) 479 { 480 return (AE_BAD_PARAMETER); 481 } 482 483 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 484 if (ACPI_FAILURE (Status)) 485 { 486 return (Status); 487 } 488 489 Status = AcpiUtRemoveInterface (InterfaceName); 490 491 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 492 return (Status); 493 } 494 495 ACPI_EXPORT_SYMBOL (AcpiRemoveInterface) 496 497 498 /***************************************************************************** 499 * 500 * FUNCTION: AcpiInstallInterfaceHandler 501 * 502 * PARAMETERS: Handler - The _OSI interface handler to install 503 * NULL means "remove existing handler" 504 * 505 * RETURN: Status 506 * 507 * DESCRIPTION: Install a handler for the predefined _OSI ACPI method. 508 * invoked during execution of the internal implementation of 509 * _OSI. A NULL handler simply removes any existing handler. 510 * 511 ****************************************************************************/ 512 513 ACPI_STATUS 514 AcpiInstallInterfaceHandler ( 515 ACPI_INTERFACE_HANDLER Handler) 516 { 517 ACPI_STATUS Status; 518 519 520 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 521 if (ACPI_FAILURE (Status)) 522 { 523 return (Status); 524 } 525 526 if (Handler && AcpiGbl_InterfaceHandler) 527 { 528 Status = AE_ALREADY_EXISTS; 529 } 530 else 531 { 532 AcpiGbl_InterfaceHandler = Handler; 533 } 534 535 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 536 return (Status); 537 } 538 539 ACPI_EXPORT_SYMBOL (AcpiInstallInterfaceHandler) 540 541 542 /***************************************************************************** 543 * 544 * FUNCTION: AcpiUpdateInterfaces 545 * 546 * PARAMETERS: Action - Actions to be performed during the 547 * update 548 * 549 * RETURN: Status 550 * 551 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor 552 * string or/and feature group strings. 553 * 554 ****************************************************************************/ 555 556 ACPI_STATUS 557 AcpiUpdateInterfaces ( 558 UINT8 Action) 559 { 560 ACPI_STATUS Status; 561 562 563 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 564 if (ACPI_FAILURE (Status)) 565 { 566 return (Status); 567 } 568 569 Status = AcpiUtUpdateInterfaces (Action); 570 571 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 572 return (Status); 573 } 574 575 576 /***************************************************************************** 577 * 578 * FUNCTION: AcpiCheckAddressRange 579 * 580 * PARAMETERS: SpaceId - Address space ID 581 * Address - Start address 582 * Length - Length 583 * Warn - TRUE if warning on overlap desired 584 * 585 * RETURN: Count of the number of conflicts detected. 586 * 587 * DESCRIPTION: Check if the input address range overlaps any of the 588 * ASL operation region address ranges. 589 * 590 ****************************************************************************/ 591 592 UINT32 593 AcpiCheckAddressRange ( 594 ACPI_ADR_SPACE_TYPE SpaceId, 595 ACPI_PHYSICAL_ADDRESS Address, 596 ACPI_SIZE Length, 597 BOOLEAN Warn) 598 { 599 UINT32 Overlaps; 600 ACPI_STATUS Status; 601 602 603 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 604 if (ACPI_FAILURE (Status)) 605 { 606 return (0); 607 } 608 609 Overlaps = AcpiUtCheckAddressRange (SpaceId, Address, 610 (UINT32) Length, Warn); 611 612 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 613 return (Overlaps); 614 } 615 616 ACPI_EXPORT_SYMBOL (AcpiCheckAddressRange) 617 618 #endif /* !ACPI_ASL_COMPILER */ 619 620 621 /******************************************************************************* 622 * 623 * FUNCTION: AcpiDecodePldBuffer 624 * 625 * PARAMETERS: InBuffer - Buffer returned by _PLD method 626 * Length - Length of the InBuffer 627 * ReturnBuffer - Where the decode buffer is returned 628 * 629 * RETURN: Status and the decoded _PLD buffer. User must deallocate 630 * the buffer via ACPI_FREE. 631 * 632 * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into 633 * a local struct that is much more useful to an ACPI driver. 634 * 635 ******************************************************************************/ 636 637 ACPI_STATUS 638 AcpiDecodePldBuffer ( 639 UINT8 *InBuffer, 640 ACPI_SIZE Length, 641 ACPI_PLD_INFO **ReturnBuffer) 642 { 643 ACPI_PLD_INFO *PldInfo; 644 UINT32 *Buffer = ACPI_CAST_PTR (UINT32, InBuffer); 645 UINT32 Dword; 646 647 648 /* Parameter validation */ 649 650 if (!InBuffer || !ReturnBuffer || (Length < ACPI_PLD_REV1_BUFFER_SIZE)) 651 { 652 return (AE_BAD_PARAMETER); 653 } 654 655 PldInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PLD_INFO)); 656 if (!PldInfo) 657 { 658 return (AE_NO_MEMORY); 659 } 660 661 /* First 32-bit DWord */ 662 663 ACPI_MOVE_32_TO_32 (&Dword, &Buffer[0]); 664 PldInfo->Revision = ACPI_PLD_GET_REVISION (&Dword); 665 PldInfo->IgnoreColor = ACPI_PLD_GET_IGNORE_COLOR (&Dword); 666 PldInfo->Red = ACPI_PLD_GET_RED (&Dword); 667 PldInfo->Green = ACPI_PLD_GET_GREEN (&Dword); 668 PldInfo->Blue = ACPI_PLD_GET_BLUE (&Dword); 669 670 /* Second 32-bit DWord */ 671 672 ACPI_MOVE_32_TO_32 (&Dword, &Buffer[1]); 673 PldInfo->Width = ACPI_PLD_GET_WIDTH (&Dword); 674 PldInfo->Height = ACPI_PLD_GET_HEIGHT(&Dword); 675 676 /* Third 32-bit DWord */ 677 678 ACPI_MOVE_32_TO_32 (&Dword, &Buffer[2]); 679 PldInfo->UserVisible = ACPI_PLD_GET_USER_VISIBLE (&Dword); 680 PldInfo->Dock = ACPI_PLD_GET_DOCK (&Dword); 681 PldInfo->Lid = ACPI_PLD_GET_LID (&Dword); 682 PldInfo->Panel = ACPI_PLD_GET_PANEL (&Dword); 683 PldInfo->VerticalPosition = ACPI_PLD_GET_VERTICAL (&Dword); 684 PldInfo->HorizontalPosition = ACPI_PLD_GET_HORIZONTAL (&Dword); 685 PldInfo->Shape = ACPI_PLD_GET_SHAPE (&Dword); 686 PldInfo->GroupOrientation = ACPI_PLD_GET_ORIENTATION (&Dword); 687 PldInfo->GroupToken = ACPI_PLD_GET_TOKEN (&Dword); 688 PldInfo->GroupPosition = ACPI_PLD_GET_POSITION (&Dword); 689 PldInfo->Bay = ACPI_PLD_GET_BAY (&Dword); 690 691 /* Fourth 32-bit DWord */ 692 693 ACPI_MOVE_32_TO_32 (&Dword, &Buffer[3]); 694 PldInfo->Ejectable = ACPI_PLD_GET_EJECTABLE (&Dword); 695 PldInfo->OspmEjectRequired = ACPI_PLD_GET_OSPM_EJECT (&Dword); 696 PldInfo->CabinetNumber = ACPI_PLD_GET_CABINET (&Dword); 697 PldInfo->CardCageNumber = ACPI_PLD_GET_CARD_CAGE (&Dword); 698 PldInfo->Reference = ACPI_PLD_GET_REFERENCE (&Dword); 699 PldInfo->Rotation = ACPI_PLD_GET_ROTATION (&Dword); 700 PldInfo->Order = ACPI_PLD_GET_ORDER (&Dword); 701 702 if (Length >= ACPI_PLD_REV2_BUFFER_SIZE) 703 { 704 /* Fifth 32-bit DWord (Revision 2 of _PLD) */ 705 706 ACPI_MOVE_32_TO_32 (&Dword, &Buffer[4]); 707 PldInfo->VerticalOffset = ACPI_PLD_GET_VERT_OFFSET (&Dword); 708 PldInfo->HorizontalOffset = ACPI_PLD_GET_HORIZ_OFFSET (&Dword); 709 } 710 711 *ReturnBuffer = PldInfo; 712 return (AE_OK); 713 } 714 715 ACPI_EXPORT_SYMBOL (AcpiDecodePldBuffer) 716