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