1 /****************************************************************************** 2 * 3 * Module Name: nsinit - namespace initialization 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2013, 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 *****************************************************************************/ 115 116 117 #define __NSXFINIT_C__ 118 119 #include "acpi.h" 120 #include "accommon.h" 121 #include "acnamesp.h" 122 #include "acdispat.h" 123 #include "acinterp.h" 124 125 #define _COMPONENT ACPI_NAMESPACE 126 ACPI_MODULE_NAME ("nsinit") 127 128 /* Local prototypes */ 129 130 static ACPI_STATUS 131 AcpiNsInitOneObject ( 132 ACPI_HANDLE ObjHandle, 133 UINT32 Level, 134 void *Context, 135 void **ReturnValue); 136 137 static ACPI_STATUS 138 AcpiNsInitOneDevice ( 139 ACPI_HANDLE ObjHandle, 140 UINT32 NestingLevel, 141 void *Context, 142 void **ReturnValue); 143 144 static ACPI_STATUS 145 AcpiNsFindIniMethods ( 146 ACPI_HANDLE ObjHandle, 147 UINT32 NestingLevel, 148 void *Context, 149 void **ReturnValue); 150 151 152 /******************************************************************************* 153 * 154 * FUNCTION: AcpiNsInitializeObjects 155 * 156 * PARAMETERS: None 157 * 158 * RETURN: Status 159 * 160 * DESCRIPTION: Walk the entire namespace and perform any necessary 161 * initialization on the objects found therein 162 * 163 ******************************************************************************/ 164 165 ACPI_STATUS 166 AcpiNsInitializeObjects ( 167 void) 168 { 169 ACPI_STATUS Status; 170 ACPI_INIT_WALK_INFO Info; 171 172 173 ACPI_FUNCTION_TRACE (NsInitializeObjects); 174 175 176 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 177 "**** Starting initialization of namespace objects ****\n")); 178 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 179 "Completing Region/Field/Buffer/Package initialization:\n")); 180 181 /* Set all init info to zero */ 182 183 ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO)); 184 185 /* Walk entire namespace from the supplied root */ 186 187 Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 188 ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL, 189 &Info, NULL); 190 if (ACPI_FAILURE (Status)) 191 { 192 ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace")); 193 } 194 195 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 196 " Initialized %u/%u Regions %u/%u Fields %u/%u " 197 "Buffers %u/%u Packages (%u nodes)\n", 198 Info.OpRegionInit, Info.OpRegionCount, 199 Info.FieldInit, Info.FieldCount, 200 Info.BufferInit, Info.BufferCount, 201 Info.PackageInit, Info.PackageCount, Info.ObjectCount)); 202 203 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 204 "%u Control Methods found\n", Info.MethodCount)); 205 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 206 "%u Op Regions found\n", Info.OpRegionCount)); 207 208 return_ACPI_STATUS (AE_OK); 209 } 210 211 212 /******************************************************************************* 213 * 214 * FUNCTION: AcpiNsInitializeDevices 215 * 216 * PARAMETERS: None 217 * 218 * RETURN: ACPI_STATUS 219 * 220 * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. 221 * This means running _INI on all present devices. 222 * 223 * Note: We install PCI config space handler on region access, 224 * not here. 225 * 226 ******************************************************************************/ 227 228 ACPI_STATUS 229 AcpiNsInitializeDevices ( 230 void) 231 { 232 ACPI_STATUS Status; 233 ACPI_DEVICE_WALK_INFO Info; 234 235 236 ACPI_FUNCTION_TRACE (NsInitializeDevices); 237 238 239 /* Init counters */ 240 241 Info.DeviceCount = 0; 242 Info.Num_STA = 0; 243 Info.Num_INI = 0; 244 245 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 246 "Initializing Device/Processor/Thermal objects " 247 "and executing _INI/_STA methods:\n")); 248 249 /* Tree analysis: find all subtrees that contain _INI methods */ 250 251 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 252 ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL); 253 if (ACPI_FAILURE (Status)) 254 { 255 goto ErrorExit; 256 } 257 258 /* Allocate the evaluation information block */ 259 260 Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); 261 if (!Info.EvaluateInfo) 262 { 263 Status = AE_NO_MEMORY; 264 goto ErrorExit; 265 } 266 267 /* 268 * Execute the "global" _INI method that may appear at the root. This 269 * support is provided for Windows compatibility (Vista+) and is not 270 * part of the ACPI specification. 271 */ 272 Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode; 273 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI; 274 Info.EvaluateInfo->Parameters = NULL; 275 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE; 276 277 Status = AcpiNsEvaluate (Info.EvaluateInfo); 278 if (ACPI_SUCCESS (Status)) 279 { 280 Info.Num_INI++; 281 } 282 283 /* Walk namespace to execute all _INIs on present devices */ 284 285 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 286 ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL); 287 288 /* 289 * Any _OSI requests should be completed by now. If the BIOS has 290 * requested any Windows OSI strings, we will always truncate 291 * I/O addresses to 16 bits -- for Windows compatibility. 292 */ 293 if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000) 294 { 295 AcpiGbl_TruncateIoAddresses = TRUE; 296 } 297 298 ACPI_FREE (Info.EvaluateInfo); 299 if (ACPI_FAILURE (Status)) 300 { 301 goto ErrorExit; 302 } 303 304 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 305 " Executed %u _INI methods requiring %u _STA executions " 306 "(examined %u objects)\n", 307 Info.Num_INI, Info.Num_STA, Info.DeviceCount)); 308 309 return_ACPI_STATUS (Status); 310 311 312 ErrorExit: 313 ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization")); 314 return_ACPI_STATUS (Status); 315 } 316 317 318 /******************************************************************************* 319 * 320 * FUNCTION: AcpiNsInitOneObject 321 * 322 * PARAMETERS: ObjHandle - Node 323 * Level - Current nesting level 324 * Context - Points to a init info struct 325 * ReturnValue - Not used 326 * 327 * RETURN: Status 328 * 329 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object 330 * within the namespace. 331 * 332 * Currently, the only objects that require initialization are: 333 * 1) Methods 334 * 2) Op Regions 335 * 336 ******************************************************************************/ 337 338 static ACPI_STATUS 339 AcpiNsInitOneObject ( 340 ACPI_HANDLE ObjHandle, 341 UINT32 Level, 342 void *Context, 343 void **ReturnValue) 344 { 345 ACPI_OBJECT_TYPE Type; 346 ACPI_STATUS Status = AE_OK; 347 ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context; 348 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; 349 ACPI_OPERAND_OBJECT *ObjDesc; 350 351 352 ACPI_FUNCTION_NAME (NsInitOneObject); 353 354 355 Info->ObjectCount++; 356 357 /* And even then, we are only interested in a few object types */ 358 359 Type = AcpiNsGetType (ObjHandle); 360 ObjDesc = AcpiNsGetAttachedObject (Node); 361 if (!ObjDesc) 362 { 363 return (AE_OK); 364 } 365 366 /* Increment counters for object types we are looking for */ 367 368 switch (Type) 369 { 370 case ACPI_TYPE_REGION: 371 372 Info->OpRegionCount++; 373 break; 374 375 case ACPI_TYPE_BUFFER_FIELD: 376 377 Info->FieldCount++; 378 break; 379 380 case ACPI_TYPE_LOCAL_BANK_FIELD: 381 382 Info->FieldCount++; 383 break; 384 385 case ACPI_TYPE_BUFFER: 386 387 Info->BufferCount++; 388 break; 389 390 case ACPI_TYPE_PACKAGE: 391 392 Info->PackageCount++; 393 break; 394 395 default: 396 397 /* No init required, just exit now */ 398 399 return (AE_OK); 400 } 401 402 /* If the object is already initialized, nothing else to do */ 403 404 if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID) 405 { 406 return (AE_OK); 407 } 408 409 /* Must lock the interpreter before executing AML code */ 410 411 AcpiExEnterInterpreter (); 412 413 /* 414 * Each of these types can contain executable AML code within the 415 * declaration. 416 */ 417 switch (Type) 418 { 419 case ACPI_TYPE_REGION: 420 421 Info->OpRegionInit++; 422 Status = AcpiDsGetRegionArguments (ObjDesc); 423 break; 424 425 case ACPI_TYPE_BUFFER_FIELD: 426 427 Info->FieldInit++; 428 Status = AcpiDsGetBufferFieldArguments (ObjDesc); 429 break; 430 431 case ACPI_TYPE_LOCAL_BANK_FIELD: 432 433 Info->FieldInit++; 434 Status = AcpiDsGetBankFieldArguments (ObjDesc); 435 break; 436 437 case ACPI_TYPE_BUFFER: 438 439 Info->BufferInit++; 440 Status = AcpiDsGetBufferArguments (ObjDesc); 441 break; 442 443 case ACPI_TYPE_PACKAGE: 444 445 Info->PackageInit++; 446 Status = AcpiDsGetPackageArguments (ObjDesc); 447 break; 448 449 default: 450 451 /* No other types can get here */ 452 453 break; 454 } 455 456 if (ACPI_FAILURE (Status)) 457 { 458 ACPI_EXCEPTION ((AE_INFO, Status, 459 "Could not execute arguments for [%4.4s] (%s)", 460 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type))); 461 } 462 463 /* 464 * We ignore errors from above, and always return OK, since we don't want 465 * to abort the walk on any single error. 466 */ 467 AcpiExExitInterpreter (); 468 return (AE_OK); 469 } 470 471 472 /******************************************************************************* 473 * 474 * FUNCTION: AcpiNsFindIniMethods 475 * 476 * PARAMETERS: ACPI_WALK_CALLBACK 477 * 478 * RETURN: ACPI_STATUS 479 * 480 * DESCRIPTION: Called during namespace walk. Finds objects named _INI under 481 * device/processor/thermal objects, and marks the entire subtree 482 * with a SUBTREE_HAS_INI flag. This flag is used during the 483 * subsequent device initialization walk to avoid entire subtrees 484 * that do not contain an _INI. 485 * 486 ******************************************************************************/ 487 488 static ACPI_STATUS 489 AcpiNsFindIniMethods ( 490 ACPI_HANDLE ObjHandle, 491 UINT32 NestingLevel, 492 void *Context, 493 void **ReturnValue) 494 { 495 ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); 496 ACPI_NAMESPACE_NODE *Node; 497 ACPI_NAMESPACE_NODE *ParentNode; 498 499 500 /* Keep count of device/processor/thermal objects */ 501 502 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 503 if ((Node->Type == ACPI_TYPE_DEVICE) || 504 (Node->Type == ACPI_TYPE_PROCESSOR) || 505 (Node->Type == ACPI_TYPE_THERMAL)) 506 { 507 Info->DeviceCount++; 508 return (AE_OK); 509 } 510 511 /* We are only looking for methods named _INI */ 512 513 if (!ACPI_COMPARE_NAME (Node->Name.Ascii, METHOD_NAME__INI)) 514 { 515 return (AE_OK); 516 } 517 518 /* 519 * The only _INI methods that we care about are those that are 520 * present under Device, Processor, and Thermal objects. 521 */ 522 ParentNode = Node->Parent; 523 switch (ParentNode->Type) 524 { 525 case ACPI_TYPE_DEVICE: 526 case ACPI_TYPE_PROCESSOR: 527 case ACPI_TYPE_THERMAL: 528 529 /* Mark parent and bubble up the INI present flag to the root */ 530 531 while (ParentNode) 532 { 533 ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI; 534 ParentNode = ParentNode->Parent; 535 } 536 break; 537 538 default: 539 540 break; 541 } 542 543 return (AE_OK); 544 } 545 546 547 /******************************************************************************* 548 * 549 * FUNCTION: AcpiNsInitOneDevice 550 * 551 * PARAMETERS: ACPI_WALK_CALLBACK 552 * 553 * RETURN: ACPI_STATUS 554 * 555 * DESCRIPTION: This is called once per device soon after ACPI is enabled 556 * to initialize each device. It determines if the device is 557 * present, and if so, calls _INI. 558 * 559 ******************************************************************************/ 560 561 static ACPI_STATUS 562 AcpiNsInitOneDevice ( 563 ACPI_HANDLE ObjHandle, 564 UINT32 NestingLevel, 565 void *Context, 566 void **ReturnValue) 567 { 568 ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); 569 ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo; 570 UINT32 Flags; 571 ACPI_STATUS Status; 572 ACPI_NAMESPACE_NODE *DeviceNode; 573 574 575 ACPI_FUNCTION_TRACE (NsInitOneDevice); 576 577 578 /* We are interested in Devices, Processors and ThermalZones only */ 579 580 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 581 if ((DeviceNode->Type != ACPI_TYPE_DEVICE) && 582 (DeviceNode->Type != ACPI_TYPE_PROCESSOR) && 583 (DeviceNode->Type != ACPI_TYPE_THERMAL)) 584 { 585 return_ACPI_STATUS (AE_OK); 586 } 587 588 /* 589 * Because of an earlier namespace analysis, all subtrees that contain an 590 * _INI method are tagged. 591 * 592 * If this device subtree does not contain any _INI methods, we 593 * can exit now and stop traversing this entire subtree. 594 */ 595 if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI)) 596 { 597 return_ACPI_STATUS (AE_CTRL_DEPTH); 598 } 599 600 /* 601 * Run _STA to determine if this device is present and functioning. We 602 * must know this information for two important reasons (from ACPI spec): 603 * 604 * 1) We can only run _INI if the device is present. 605 * 2) We must abort the device tree walk on this subtree if the device is 606 * not present and is not functional (we will not examine the children) 607 * 608 * The _STA method is not required to be present under the device, we 609 * assume the device is present if _STA does not exist. 610 */ 611 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( 612 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA)); 613 614 Status = AcpiUtExecute_STA (DeviceNode, &Flags); 615 if (ACPI_FAILURE (Status)) 616 { 617 /* Ignore error and move on to next device */ 618 619 return_ACPI_STATUS (AE_OK); 620 } 621 622 /* 623 * Flags == -1 means that _STA was not found. In this case, we assume that 624 * the device is both present and functional. 625 * 626 * From the ACPI spec, description of _STA: 627 * 628 * "If a device object (including the processor object) does not have an 629 * _STA object, then OSPM assumes that all of the above bits are set (in 630 * other words, the device is present, ..., and functioning)" 631 */ 632 if (Flags != ACPI_UINT32_MAX) 633 { 634 WalkInfo->Num_STA++; 635 } 636 637 /* 638 * Examine the PRESENT and FUNCTIONING status bits 639 * 640 * Note: ACPI spec does not seem to specify behavior for the present but 641 * not functioning case, so we assume functioning if present. 642 */ 643 if (!(Flags & ACPI_STA_DEVICE_PRESENT)) 644 { 645 /* Device is not present, we must examine the Functioning bit */ 646 647 if (Flags & ACPI_STA_DEVICE_FUNCTIONING) 648 { 649 /* 650 * Device is not present but is "functioning". In this case, 651 * we will not run _INI, but we continue to examine the children 652 * of this device. 653 * 654 * From the ACPI spec, description of _STA: (Note - no mention 655 * of whether to run _INI or not on the device in question) 656 * 657 * "_STA may return bit 0 clear (not present) with bit 3 set 658 * (device is functional). This case is used to indicate a valid 659 * device for which no device driver should be loaded (for example, 660 * a bridge device.) Children of this device may be present and 661 * valid. OSPM should continue enumeration below a device whose 662 * _STA returns this bit combination" 663 */ 664 return_ACPI_STATUS (AE_OK); 665 } 666 else 667 { 668 /* 669 * Device is not present and is not functioning. We must abort the 670 * walk of this subtree immediately -- don't look at the children 671 * of such a device. 672 * 673 * From the ACPI spec, description of _INI: 674 * 675 * "If the _STA method indicates that the device is not present, 676 * OSPM will not run the _INI and will not examine the children 677 * of the device for _INI methods" 678 */ 679 return_ACPI_STATUS (AE_CTRL_DEPTH); 680 } 681 } 682 683 /* 684 * The device is present or is assumed present if no _STA exists. 685 * Run the _INI if it exists (not required to exist) 686 * 687 * Note: We know there is an _INI within this subtree, but it may not be 688 * under this particular device, it may be lower in the branch. 689 */ 690 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( 691 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI)); 692 693 ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO)); 694 Info->PrefixNode = DeviceNode; 695 Info->RelativePathname = METHOD_NAME__INI; 696 Info->Parameters = NULL; 697 Info->Flags = ACPI_IGNORE_RETURN_VALUE; 698 699 Status = AcpiNsEvaluate (Info); 700 if (ACPI_SUCCESS (Status)) 701 { 702 WalkInfo->Num_INI++; 703 } 704 705 #ifdef ACPI_DEBUG_OUTPUT 706 else if (Status != AE_NOT_FOUND) 707 { 708 /* Ignore error and move on to next device */ 709 710 char *ScopeName = AcpiNsGetExternalPathname (Info->Node); 711 712 ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution", 713 ScopeName)); 714 ACPI_FREE (ScopeName); 715 } 716 #endif 717 718 /* Ignore errors from above */ 719 720 Status = AE_OK; 721 722 /* 723 * The _INI method has been run if present; call the Global Initialization 724 * Handler for this device. 725 */ 726 if (AcpiGbl_InitHandler) 727 { 728 Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI); 729 } 730 731 return_ACPI_STATUS (Status); 732 } 733