uteval.c revision 129684
1/****************************************************************************** 2 * 3 * Module Name: uteval - Object evaluation 4 * $Revision: 54 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2004, 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 __UTEVAL_C__ 118 119#include "acpi.h" 120#include "acnamesp.h" 121#include "acinterp.h" 122 123 124#define _COMPONENT ACPI_UTILITIES 125 ACPI_MODULE_NAME ("uteval") 126 127 128/******************************************************************************* 129 * 130 * FUNCTION: AcpiUtOsiImplementation 131 * 132 * PARAMETERS: WalkState - Current walk state 133 * 134 * RETURN: Status 135 * 136 * DESCRIPTION: Implementation of _OSI predefined control method 137 * Supported = _OSI (String) 138 * 139 ******************************************************************************/ 140 141ACPI_STATUS 142AcpiUtOsiImplementation ( 143 ACPI_WALK_STATE *WalkState) 144{ 145 ACPI_OPERAND_OBJECT *StringDesc; 146 ACPI_OPERAND_OBJECT *ReturnDesc; 147 ACPI_NATIVE_UINT i; 148 149 150 ACPI_FUNCTION_TRACE ("UtOsiImplementation"); 151 152 153 /* Validate the string input argument */ 154 155 StringDesc = WalkState->Arguments[0].Object; 156 if (!StringDesc || (StringDesc->Common.Type != ACPI_TYPE_STRING)) 157 { 158 return_ACPI_STATUS (AE_TYPE); 159 } 160 161 /* Create a return object (Default value = 0) */ 162 163 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 164 if (!ReturnDesc) 165 { 166 return_ACPI_STATUS (AE_NO_MEMORY); 167 } 168 169 /* Compare input string to table of supported strings */ 170 171 for (i = 0; i < ACPI_NUM_OSI_STRINGS; i++) 172 { 173 if (!ACPI_STRCMP (StringDesc->String.Pointer, 174 (char *) AcpiGbl_ValidOsiStrings[i])) 175 { 176 /* This string is supported */ 177 178 ReturnDesc->Integer.Value = 0xFFFFFFFF; 179 break; 180 } 181 } 182 183 WalkState->ReturnDesc = ReturnDesc; 184 return_ACPI_STATUS (AE_CTRL_TERMINATE); 185} 186 187 188/******************************************************************************* 189 * 190 * FUNCTION: AcpiUtEvaluateObject 191 * 192 * PARAMETERS: PrefixNode - Starting node 193 * Path - Path to object from starting node 194 * ExpectedReturnTypes - Bitmap of allowed return types 195 * ReturnDesc - Where a return value is stored 196 * 197 * RETURN: Status 198 * 199 * DESCRIPTION: Evaluates a namespace object and verifies the type of the 200 * return object. Common code that simplifies accessing objects 201 * that have required return objects of fixed types. 202 * 203 * NOTE: Internal function, no parameter validation 204 * 205 ******************************************************************************/ 206 207ACPI_STATUS 208AcpiUtEvaluateObject ( 209 ACPI_NAMESPACE_NODE *PrefixNode, 210 char *Path, 211 UINT32 ExpectedReturnBtypes, 212 ACPI_OPERAND_OBJECT **ReturnDesc) 213{ 214 ACPI_PARAMETER_INFO Info; 215 ACPI_STATUS Status; 216 UINT32 ReturnBtype; 217 218 219 ACPI_FUNCTION_TRACE ("UtEvaluateObject"); 220 221 222 Info.Node = PrefixNode; 223 Info.Parameters = NULL; 224 Info.ParameterType = ACPI_PARAM_ARGS; 225 226 /* Evaluate the object/method */ 227 228 Status = AcpiNsEvaluateRelative (Path, &Info); 229 if (ACPI_FAILURE (Status)) 230 { 231 if (Status == AE_NOT_FOUND) 232 { 233 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n", 234 AcpiUtGetNodeName (PrefixNode), Path)); 235 } 236 else 237 { 238 ACPI_REPORT_METHOD_ERROR ("Method execution failed", 239 PrefixNode, Path, Status); 240 } 241 242 return_ACPI_STATUS (Status); 243 } 244 245 /* Did we get a return object? */ 246 247 if (!Info.ReturnObject) 248 { 249 if (ExpectedReturnBtypes) 250 { 251 ACPI_REPORT_METHOD_ERROR ("No object was returned from", 252 PrefixNode, Path, AE_NOT_EXIST); 253 254 return_ACPI_STATUS (AE_NOT_EXIST); 255 } 256 257 return_ACPI_STATUS (AE_OK); 258 } 259 260 /* Map the return object type to the bitmapped type */ 261 262 switch (ACPI_GET_OBJECT_TYPE (Info.ReturnObject)) 263 { 264 case ACPI_TYPE_INTEGER: 265 ReturnBtype = ACPI_BTYPE_INTEGER; 266 break; 267 268 case ACPI_TYPE_BUFFER: 269 ReturnBtype = ACPI_BTYPE_BUFFER; 270 break; 271 272 case ACPI_TYPE_STRING: 273 ReturnBtype = ACPI_BTYPE_STRING; 274 break; 275 276 case ACPI_TYPE_PACKAGE: 277 ReturnBtype = ACPI_BTYPE_PACKAGE; 278 break; 279 280 default: 281 ReturnBtype = 0; 282 break; 283 } 284 285 /* Is the return object one of the expected types? */ 286 287 if (!(ExpectedReturnBtypes & ReturnBtype)) 288 { 289 ACPI_REPORT_METHOD_ERROR ("Return object type is incorrect", 290 PrefixNode, Path, AE_TYPE); 291 292 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 293 "Type returned from %s was incorrect: %X\n", 294 Path, ACPI_GET_OBJECT_TYPE (Info.ReturnObject))); 295 296 /* On error exit, we must delete the return object */ 297 298 AcpiUtRemoveReference (Info.ReturnObject); 299 return_ACPI_STATUS (AE_TYPE); 300 } 301 302 /* Object type is OK, return it */ 303 304 *ReturnDesc = Info.ReturnObject; 305 return_ACPI_STATUS (AE_OK); 306} 307 308 309/******************************************************************************* 310 * 311 * FUNCTION: AcpiUtEvaluateNumericObject 312 * 313 * PARAMETERS: *ObjectName - Object name to be evaluated 314 * DeviceNode - Node for the device 315 * *Address - Where the value is returned 316 * 317 * RETURN: Status 318 * 319 * DESCRIPTION: Evaluates a numeric namespace object for a selected device 320 * and stores result in *Address. 321 * 322 * NOTE: Internal function, no parameter validation 323 * 324 ******************************************************************************/ 325 326ACPI_STATUS 327AcpiUtEvaluateNumericObject ( 328 char *ObjectName, 329 ACPI_NAMESPACE_NODE *DeviceNode, 330 ACPI_INTEGER *Address) 331{ 332 ACPI_OPERAND_OBJECT *ObjDesc; 333 ACPI_STATUS Status; 334 335 336 ACPI_FUNCTION_TRACE ("UtEvaluateNumericObject"); 337 338 339 Status = AcpiUtEvaluateObject (DeviceNode, ObjectName, 340 ACPI_BTYPE_INTEGER, &ObjDesc); 341 if (ACPI_FAILURE (Status)) 342 { 343 return_ACPI_STATUS (Status); 344 } 345 346 /* Get the returned Integer */ 347 348 *Address = ObjDesc->Integer.Value; 349 350 /* On exit, we must delete the return object */ 351 352 AcpiUtRemoveReference (ObjDesc); 353 return_ACPI_STATUS (Status); 354} 355 356 357/******************************************************************************* 358 * 359 * FUNCTION: AcpiUtCopyIdString 360 * 361 * PARAMETERS: Destination - Where to copy the string 362 * Source - Source string 363 * MaxLength - Length of the destination buffer 364 * 365 * RETURN: None 366 * 367 * DESCRIPTION: Copies an ID string for the _HID, _CID, and _UID methods. 368 * Performs removal of a leading asterisk if present -- workaround 369 * for a known issue on a bunch of machines. 370 * 371 ******************************************************************************/ 372 373static void 374AcpiUtCopyIdString ( 375 char *Destination, 376 char *Source, 377 ACPI_SIZE MaxLength) 378{ 379 380 381 /* 382 * Workaround for ID strings that have a leading asterisk. This construct 383 * is not allowed by the ACPI specification (ID strings must be 384 * alphanumeric), but enough existing machines have this embedded in their 385 * ID strings that the following code is useful. 386 */ 387 if (*Source == '*') 388 { 389 Source++; 390 } 391 392 /* Do the actual copy */ 393 394 ACPI_STRNCPY (Destination, Source, MaxLength); 395} 396 397 398/******************************************************************************* 399 * 400 * FUNCTION: AcpiUtExecute_HID 401 * 402 * PARAMETERS: DeviceNode - Node for the device 403 * *Hid - Where the HID is returned 404 * 405 * RETURN: Status 406 * 407 * DESCRIPTION: Executes the _HID control method that returns the hardware 408 * ID of the device. 409 * 410 * NOTE: Internal function, no parameter validation 411 * 412 ******************************************************************************/ 413 414ACPI_STATUS 415AcpiUtExecute_HID ( 416 ACPI_NAMESPACE_NODE *DeviceNode, 417 ACPI_DEVICE_ID *Hid) 418{ 419 ACPI_OPERAND_OBJECT *ObjDesc; 420 ACPI_STATUS Status; 421 422 423 ACPI_FUNCTION_TRACE ("UtExecute_HID"); 424 425 426 Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__HID, 427 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc); 428 if (ACPI_FAILURE (Status)) 429 { 430 return_ACPI_STATUS (Status); 431 } 432 433 if (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_INTEGER) 434 { 435 /* Convert the Numeric HID to string */ 436 437 AcpiExEisaIdToString ((UINT32) ObjDesc->Integer.Value, Hid->Value); 438 } 439 else 440 { 441 /* Copy the String HID from the returned object */ 442 443 AcpiUtCopyIdString (Hid->Value, ObjDesc->String.Pointer, 444 sizeof (Hid->Value)); 445 } 446 447 /* On exit, we must delete the return object */ 448 449 AcpiUtRemoveReference (ObjDesc); 450 return_ACPI_STATUS (Status); 451} 452 453 454/******************************************************************************* 455 * 456 * FUNCTION: AcpiUtTranslateOneCid 457 * 458 * PARAMETERS: ObjDesc - _CID object, must be integer or string 459 * OneCid - Where the CID string is returned 460 * 461 * RETURN: Status 462 * 463 * DESCRIPTION: Return a numeric or string _CID value as a string. 464 * (Compatible ID) 465 * 466 * NOTE: Assumes a maximum _CID string length of 467 * ACPI_MAX_CID_LENGTH. 468 * 469 ******************************************************************************/ 470 471static ACPI_STATUS 472AcpiUtTranslateOneCid ( 473 ACPI_OPERAND_OBJECT *ObjDesc, 474 ACPI_COMPATIBLE_ID *OneCid) 475{ 476 477 478 switch (ACPI_GET_OBJECT_TYPE (ObjDesc)) 479 { 480 case ACPI_TYPE_INTEGER: 481 482 /* Convert the Numeric CID to string */ 483 484 AcpiExEisaIdToString ((UINT32) ObjDesc->Integer.Value, OneCid->Value); 485 return (AE_OK); 486 487 case ACPI_TYPE_STRING: 488 489 if (ObjDesc->String.Length > ACPI_MAX_CID_LENGTH) 490 { 491 return (AE_AML_STRING_LIMIT); 492 } 493 494 /* Copy the String CID from the returned object */ 495 496 AcpiUtCopyIdString (OneCid->Value, ObjDesc->String.Pointer, 497 ACPI_MAX_CID_LENGTH); 498 return (AE_OK); 499 500 default: 501 502 return (AE_TYPE); 503 } 504} 505 506 507/******************************************************************************* 508 * 509 * FUNCTION: AcpiUtExecute_CID 510 * 511 * PARAMETERS: DeviceNode - Node for the device 512 * *Cid - Where the CID is returned 513 * 514 * RETURN: Status 515 * 516 * DESCRIPTION: Executes the _CID control method that returns one or more 517 * compatible hardware IDs for the device. 518 * 519 * NOTE: Internal function, no parameter validation 520 * 521 ******************************************************************************/ 522 523ACPI_STATUS 524AcpiUtExecute_CID ( 525 ACPI_NAMESPACE_NODE *DeviceNode, 526 ACPI_COMPATIBLE_ID_LIST **ReturnCidList) 527{ 528 ACPI_OPERAND_OBJECT *ObjDesc; 529 ACPI_STATUS Status; 530 UINT32 Count; 531 UINT32 Size; 532 ACPI_COMPATIBLE_ID_LIST *CidList; 533 ACPI_NATIVE_UINT i; 534 535 536 ACPI_FUNCTION_TRACE ("UtExecute_CID"); 537 538 539 /* Evaluate the _CID method for this device */ 540 541 Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__CID, 542 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING | ACPI_BTYPE_PACKAGE, 543 &ObjDesc); 544 if (ACPI_FAILURE (Status)) 545 { 546 return_ACPI_STATUS (Status); 547 } 548 549 /* Get the number of _CIDs returned */ 550 551 Count = 1; 552 if (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_PACKAGE) 553 { 554 Count = ObjDesc->Package.Count; 555 } 556 557 /* Allocate a worst-case buffer for the _CIDs */ 558 559 Size = (((Count - 1) * sizeof (ACPI_COMPATIBLE_ID)) + 560 sizeof (ACPI_COMPATIBLE_ID_LIST)); 561 562 CidList = ACPI_MEM_CALLOCATE ((ACPI_SIZE) Size); 563 if (!CidList) 564 { 565 return_ACPI_STATUS (AE_NO_MEMORY); 566 } 567 568 /* Init CID list */ 569 570 CidList->Count = Count; 571 CidList->Size = Size; 572 573 /* 574 * A _CID can return either a single compatible ID or a package of compatible 575 * IDs. Each compatible ID can be one of the following: 576 * -- Number (32 bit compressed EISA ID) or 577 * -- String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss"). 578 */ 579 580 /* The _CID object can be either a single CID or a package (list) of CIDs */ 581 582 if (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_PACKAGE) 583 { 584 /* Translate each package element */ 585 586 for (i = 0; i < Count; i++) 587 { 588 Status = AcpiUtTranslateOneCid (ObjDesc->Package.Elements[i], 589 &CidList->Id[i]); 590 if (ACPI_FAILURE (Status)) 591 { 592 break; 593 } 594 } 595 } 596 else 597 { 598 /* Only one CID, translate to a string */ 599 600 Status = AcpiUtTranslateOneCid (ObjDesc, CidList->Id); 601 } 602 603 /* Cleanup on error */ 604 605 if (ACPI_FAILURE (Status)) 606 { 607 ACPI_MEM_FREE (CidList); 608 } 609 else 610 { 611 *ReturnCidList = CidList; 612 } 613 614 /* On exit, we must delete the _CID return object */ 615 616 AcpiUtRemoveReference (ObjDesc); 617 return_ACPI_STATUS (Status); 618} 619 620 621/******************************************************************************* 622 * 623 * FUNCTION: AcpiUtExecute_UID 624 * 625 * PARAMETERS: DeviceNode - Node for the device 626 * *Uid - Where the UID is returned 627 * 628 * RETURN: Status 629 * 630 * DESCRIPTION: Executes the _UID control method that returns the hardware 631 * ID of the device. 632 * 633 * NOTE: Internal function, no parameter validation 634 * 635 ******************************************************************************/ 636 637ACPI_STATUS 638AcpiUtExecute_UID ( 639 ACPI_NAMESPACE_NODE *DeviceNode, 640 ACPI_DEVICE_ID *Uid) 641{ 642 ACPI_OPERAND_OBJECT *ObjDesc; 643 ACPI_STATUS Status; 644 645 646 ACPI_FUNCTION_TRACE ("UtExecute_UID"); 647 648 649 Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__UID, 650 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc); 651 if (ACPI_FAILURE (Status)) 652 { 653 return_ACPI_STATUS (Status); 654 } 655 656 if (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_INTEGER) 657 { 658 /* Convert the Numeric UID to string */ 659 660 AcpiExUnsignedIntegerToString (ObjDesc->Integer.Value, Uid->Value); 661 } 662 else 663 { 664 /* Copy the String UID from the returned object */ 665 666 AcpiUtCopyIdString (Uid->Value, ObjDesc->String.Pointer, 667 sizeof (Uid->Value)); 668 } 669 670 /* On exit, we must delete the return object */ 671 672 AcpiUtRemoveReference (ObjDesc); 673 return_ACPI_STATUS (Status); 674} 675 676 677/******************************************************************************* 678 * 679 * FUNCTION: AcpiUtExecute_STA 680 * 681 * PARAMETERS: DeviceNode - Node for the device 682 * *Flags - Where the status flags are returned 683 * 684 * RETURN: Status 685 * 686 * DESCRIPTION: Executes _STA for selected device and stores results in 687 * *Flags. 688 * 689 * NOTE: Internal function, no parameter validation 690 * 691 ******************************************************************************/ 692 693ACPI_STATUS 694AcpiUtExecute_STA ( 695 ACPI_NAMESPACE_NODE *DeviceNode, 696 UINT32 *Flags) 697{ 698 ACPI_OPERAND_OBJECT *ObjDesc; 699 ACPI_STATUS Status; 700 701 702 ACPI_FUNCTION_TRACE ("UtExecute_STA"); 703 704 705 Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__STA, 706 ACPI_BTYPE_INTEGER, &ObjDesc); 707 if (ACPI_FAILURE (Status)) 708 { 709 if (AE_NOT_FOUND == Status) 710 { 711 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 712 "_STA on %4.4s was not found, assuming device is present\n", 713 AcpiUtGetNodeName (DeviceNode))); 714 715 *Flags = 0x0F; 716 Status = AE_OK; 717 } 718 719 return_ACPI_STATUS (Status); 720 } 721 722 /* Extract the status flags */ 723 724 *Flags = (UINT32) ObjDesc->Integer.Value; 725 726 /* On exit, we must delete the return object */ 727 728 AcpiUtRemoveReference (ObjDesc); 729 return_ACPI_STATUS (Status); 730} 731 732 733/******************************************************************************* 734 * 735 * FUNCTION: AcpiUtExecute_Sxds 736 * 737 * PARAMETERS: DeviceNode - Node for the device 738 * *Flags - Where the status flags are returned 739 * 740 * RETURN: Status 741 * 742 * DESCRIPTION: Executes _STA for selected device and stores results in 743 * *Flags. 744 * 745 * NOTE: Internal function, no parameter validation 746 * 747 ******************************************************************************/ 748 749ACPI_STATUS 750AcpiUtExecute_Sxds ( 751 ACPI_NAMESPACE_NODE *DeviceNode, 752 UINT8 *Highest) 753{ 754 ACPI_OPERAND_OBJECT *ObjDesc; 755 ACPI_STATUS Status; 756 UINT32 i; 757 758 759 ACPI_FUNCTION_TRACE ("UtExecute_Sxds"); 760 761 762 for (i = 0; i < 4; i++) 763 { 764 Highest[i] = 0xFF; 765 Status = AcpiUtEvaluateObject (DeviceNode, 766 (char *) AcpiGbl_HighestDstateNames[i], 767 ACPI_BTYPE_INTEGER, &ObjDesc); 768 if (ACPI_FAILURE (Status)) 769 { 770 if (Status != AE_NOT_FOUND) 771 { 772 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 773 "%s on Device %4.4s, %s\n", 774 (char *) AcpiGbl_HighestDstateNames[i], 775 AcpiUtGetNodeName (DeviceNode), 776 AcpiFormatException (Status))); 777 778 return_ACPI_STATUS (Status); 779 } 780 } 781 else 782 { 783 /* Extract the Dstate value */ 784 785 Highest[i] = (UINT8) ObjDesc->Integer.Value; 786 787 /* Delete the return object */ 788 789 AcpiUtRemoveReference (ObjDesc); 790 } 791 } 792 793 return_ACPI_STATUS (AE_OK); 794} 795