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 - 2018, 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 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "acpi.h" 153 #include "accommon.h" 154 #include "acnamesp.h" 155 #include "acdispat.h" 156 #include "acinterp.h" 157 #include "acevents.h" 158 159 #define _COMPONENT ACPI_NAMESPACE 160 ACPI_MODULE_NAME ("nsinit") 161 162 /* Local prototypes */ 163 164 static ACPI_STATUS 165 AcpiNsInitOneObject ( 166 ACPI_HANDLE ObjHandle, 167 UINT32 Level, 168 void *Context, 169 void **ReturnValue); 170 171 static ACPI_STATUS 172 AcpiNsInitOneDevice ( 173 ACPI_HANDLE ObjHandle, 174 UINT32 NestingLevel, 175 void *Context, 176 void **ReturnValue); 177 178 static ACPI_STATUS 179 AcpiNsFindIniMethods ( 180 ACPI_HANDLE ObjHandle, 181 UINT32 NestingLevel, 182 void *Context, 183 void **ReturnValue); 184 185 186 /******************************************************************************* 187 * 188 * FUNCTION: AcpiNsInitializeObjects 189 * 190 * PARAMETERS: None 191 * 192 * RETURN: Status 193 * 194 * DESCRIPTION: Walk the entire namespace and perform any necessary 195 * initialization on the objects found therein 196 * 197 ******************************************************************************/ 198 199 ACPI_STATUS 200 AcpiNsInitializeObjects ( 201 void) 202 { 203 ACPI_STATUS Status; 204 ACPI_INIT_WALK_INFO Info; 205 206 207 ACPI_FUNCTION_TRACE (NsInitializeObjects); 208 209 210 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 211 "[Init] Completing Initialization of ACPI Objects\n")); 212 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 213 "**** Starting initialization of namespace objects ****\n")); 214 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 215 "Completing Region/Field/Buffer/Package initialization:\n")); 216 217 /* Set all init info to zero */ 218 219 memset (&Info, 0, sizeof (ACPI_INIT_WALK_INFO)); 220 221 /* Walk entire namespace from the supplied root */ 222 223 Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 224 ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL, 225 &Info, NULL); 226 if (ACPI_FAILURE (Status)) 227 { 228 ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace")); 229 } 230 231 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 232 " Initialized %u/%u Regions %u/%u Fields %u/%u " 233 "Buffers %u/%u Packages (%u nodes)\n", 234 Info.OpRegionInit, Info.OpRegionCount, 235 Info.FieldInit, Info.FieldCount, 236 Info.BufferInit, Info.BufferCount, 237 Info.PackageInit, Info.PackageCount, Info.ObjectCount)); 238 239 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 240 "%u Control Methods found\n%u Op Regions found\n", 241 Info.MethodCount, Info.OpRegionCount)); 242 243 return_ACPI_STATUS (AE_OK); 244 } 245 246 247 /******************************************************************************* 248 * 249 * FUNCTION: AcpiNsInitializeDevices 250 * 251 * PARAMETERS: None 252 * 253 * RETURN: ACPI_STATUS 254 * 255 * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. 256 * This means running _INI on all present devices. 257 * 258 * Note: We install PCI config space handler on region access, 259 * not here. 260 * 261 ******************************************************************************/ 262 263 ACPI_STATUS 264 AcpiNsInitializeDevices ( 265 UINT32 Flags) 266 { 267 ACPI_STATUS Status = AE_OK; 268 ACPI_DEVICE_WALK_INFO Info; 269 ACPI_HANDLE Handle; 270 271 272 ACPI_FUNCTION_TRACE (NsInitializeDevices); 273 274 275 if (!(Flags & ACPI_NO_DEVICE_INIT)) 276 { 277 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 278 "[Init] Initializing ACPI Devices\n")); 279 280 /* Init counters */ 281 282 Info.DeviceCount = 0; 283 Info.Num_STA = 0; 284 Info.Num_INI = 0; 285 286 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 287 "Initializing Device/Processor/Thermal objects " 288 "and executing _INI/_STA methods:\n")); 289 290 /* Tree analysis: find all subtrees that contain _INI methods */ 291 292 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 293 ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL); 294 if (ACPI_FAILURE (Status)) 295 { 296 goto ErrorExit; 297 } 298 299 /* Allocate the evaluation information block */ 300 301 Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); 302 if (!Info.EvaluateInfo) 303 { 304 Status = AE_NO_MEMORY; 305 goto ErrorExit; 306 } 307 308 /* 309 * Execute the "global" _INI method that may appear at the root. 310 * This support is provided for Windows compatibility (Vista+) and 311 * is not part of the ACPI specification. 312 */ 313 Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode; 314 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI; 315 Info.EvaluateInfo->Parameters = NULL; 316 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE; 317 318 Status = AcpiNsEvaluate (Info.EvaluateInfo); 319 if (ACPI_SUCCESS (Status)) 320 { 321 Info.Num_INI++; 322 } 323 324 /* 325 * Execute \_SB._INI. 326 * There appears to be a strict order requirement for \_SB._INI, 327 * which should be evaluated before any _REG evaluations. 328 */ 329 Status = AcpiGetHandle (NULL, "\\_SB", &Handle); 330 if (ACPI_SUCCESS (Status)) 331 { 332 memset (Info.EvaluateInfo, 0, sizeof (ACPI_EVALUATE_INFO)); 333 Info.EvaluateInfo->PrefixNode = Handle; 334 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI; 335 Info.EvaluateInfo->Parameters = NULL; 336 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE; 337 338 Status = AcpiNsEvaluate (Info.EvaluateInfo); 339 if (ACPI_SUCCESS (Status)) 340 { 341 Info.Num_INI++; 342 } 343 } 344 } 345 346 /* 347 * Run all _REG methods 348 * 349 * Note: Any objects accessed by the _REG methods will be automatically 350 * initialized, even if they contain executable AML (see the call to 351 * AcpiNsInitializeObjects below). 352 * 353 * Note: According to the ACPI specification, we actually needn't execute 354 * _REG for SystemMemory/SystemIo operation regions, but for PCI_Config 355 * operation regions, it is required to evaluate _REG for those on a PCI 356 * root bus that doesn't contain _BBN object. So this code is kept here 357 * in order not to break things. 358 */ 359 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT)) 360 { 361 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 362 "[Init] Executing _REG OpRegion methods\n")); 363 364 Status = AcpiEvInitializeOpRegions (); 365 if (ACPI_FAILURE (Status)) 366 { 367 goto ErrorExit; 368 } 369 } 370 371 if (!(Flags & ACPI_NO_DEVICE_INIT)) 372 { 373 /* Walk namespace to execute all _INIs on present devices */ 374 375 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 376 ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL); 377 378 /* 379 * Any _OSI requests should be completed by now. If the BIOS has 380 * requested any Windows OSI strings, we will always truncate 381 * I/O addresses to 16 bits -- for Windows compatibility. 382 */ 383 if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000) 384 { 385 AcpiGbl_TruncateIoAddresses = TRUE; 386 } 387 388 ACPI_FREE (Info.EvaluateInfo); 389 if (ACPI_FAILURE (Status)) 390 { 391 goto ErrorExit; 392 } 393 394 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 395 " Executed %u _INI methods requiring %u _STA executions " 396 "(examined %u objects)\n", 397 Info.Num_INI, Info.Num_STA, Info.DeviceCount)); 398 } 399 400 return_ACPI_STATUS (Status); 401 402 403 ErrorExit: 404 ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization")); 405 return_ACPI_STATUS (Status); 406 } 407 408 409 /******************************************************************************* 410 * 411 * FUNCTION: AcpiNsInitOnePackage 412 * 413 * PARAMETERS: ObjHandle - Node 414 * Level - Current nesting level 415 * Context - Not used 416 * ReturnValue - Not used 417 * 418 * RETURN: Status 419 * 420 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every package 421 * within the namespace. Used during dynamic load of an SSDT. 422 * 423 ******************************************************************************/ 424 425 ACPI_STATUS 426 AcpiNsInitOnePackage ( 427 ACPI_HANDLE ObjHandle, 428 UINT32 Level, 429 void *Context, 430 void **ReturnValue) 431 { 432 ACPI_STATUS Status; 433 ACPI_OPERAND_OBJECT *ObjDesc; 434 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; 435 436 437 ObjDesc = AcpiNsGetAttachedObject (Node); 438 if (!ObjDesc) 439 { 440 return (AE_OK); 441 } 442 443 /* Exit if package is already initialized */ 444 445 if (ObjDesc->Package.Flags & AOPOBJ_DATA_VALID) 446 { 447 return (AE_OK); 448 } 449 450 Status = AcpiDsGetPackageArguments (ObjDesc); 451 if (ACPI_FAILURE (Status)) 452 { 453 return (AE_OK); 454 } 455 456 Status = AcpiUtWalkPackageTree (ObjDesc, NULL, AcpiDsInitPackageElement, 457 NULL); 458 if (ACPI_FAILURE (Status)) 459 { 460 return (AE_OK); 461 } 462 463 ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID; 464 return (AE_OK); 465 } 466 467 468 /******************************************************************************* 469 * 470 * FUNCTION: AcpiNsInitOneObject 471 * 472 * PARAMETERS: ObjHandle - Node 473 * Level - Current nesting level 474 * Context - Points to a init info struct 475 * ReturnValue - Not used 476 * 477 * RETURN: Status 478 * 479 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object 480 * within the namespace. 481 * 482 * Currently, the only objects that require initialization are: 483 * 1) Methods 484 * 2) Op Regions 485 * 486 ******************************************************************************/ 487 488 static ACPI_STATUS 489 AcpiNsInitOneObject ( 490 ACPI_HANDLE ObjHandle, 491 UINT32 Level, 492 void *Context, 493 void **ReturnValue) 494 { 495 ACPI_OBJECT_TYPE Type; 496 ACPI_STATUS Status = AE_OK; 497 ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context; 498 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; 499 ACPI_OPERAND_OBJECT *ObjDesc; 500 501 502 ACPI_FUNCTION_NAME (NsInitOneObject); 503 504 505 Info->ObjectCount++; 506 507 /* And even then, we are only interested in a few object types */ 508 509 Type = AcpiNsGetType (ObjHandle); 510 ObjDesc = AcpiNsGetAttachedObject (Node); 511 if (!ObjDesc) 512 { 513 return (AE_OK); 514 } 515 516 /* Increment counters for object types we are looking for */ 517 518 switch (Type) 519 { 520 case ACPI_TYPE_REGION: 521 522 Info->OpRegionCount++; 523 break; 524 525 case ACPI_TYPE_BUFFER_FIELD: 526 527 Info->FieldCount++; 528 break; 529 530 case ACPI_TYPE_LOCAL_BANK_FIELD: 531 532 Info->FieldCount++; 533 break; 534 535 case ACPI_TYPE_BUFFER: 536 537 Info->BufferCount++; 538 break; 539 540 case ACPI_TYPE_PACKAGE: 541 542 Info->PackageCount++; 543 break; 544 545 default: 546 547 /* No init required, just exit now */ 548 549 return (AE_OK); 550 } 551 552 /* If the object is already initialized, nothing else to do */ 553 554 if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID) 555 { 556 return (AE_OK); 557 } 558 559 /* Must lock the interpreter before executing AML code */ 560 561 AcpiExEnterInterpreter (); 562 563 /* 564 * Each of these types can contain executable AML code within the 565 * declaration. 566 */ 567 switch (Type) 568 { 569 case ACPI_TYPE_REGION: 570 571 Info->OpRegionInit++; 572 Status = AcpiDsGetRegionArguments (ObjDesc); 573 break; 574 575 case ACPI_TYPE_BUFFER_FIELD: 576 577 Info->FieldInit++; 578 Status = AcpiDsGetBufferFieldArguments (ObjDesc); 579 break; 580 581 case ACPI_TYPE_LOCAL_BANK_FIELD: 582 583 Info->FieldInit++; 584 Status = AcpiDsGetBankFieldArguments (ObjDesc); 585 break; 586 587 case ACPI_TYPE_BUFFER: 588 589 Info->BufferInit++; 590 Status = AcpiDsGetBufferArguments (ObjDesc); 591 break; 592 593 case ACPI_TYPE_PACKAGE: 594 595 /* Complete the initialization/resolution of the package object */ 596 597 Info->PackageInit++; 598 Status = AcpiNsInitOnePackage (ObjHandle, Level, NULL, NULL); 599 break; 600 601 default: 602 603 /* No other types can get here */ 604 605 break; 606 } 607 608 if (ACPI_FAILURE (Status)) 609 { 610 ACPI_EXCEPTION ((AE_INFO, Status, 611 "Could not execute arguments for [%4.4s] (%s)", 612 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type))); 613 } 614 615 /* 616 * We ignore errors from above, and always return OK, since we don't want 617 * to abort the walk on any single error. 618 */ 619 AcpiExExitInterpreter (); 620 return (AE_OK); 621 } 622 623 624 /******************************************************************************* 625 * 626 * FUNCTION: AcpiNsFindIniMethods 627 * 628 * PARAMETERS: ACPI_WALK_CALLBACK 629 * 630 * RETURN: ACPI_STATUS 631 * 632 * DESCRIPTION: Called during namespace walk. Finds objects named _INI under 633 * device/processor/thermal objects, and marks the entire subtree 634 * with a SUBTREE_HAS_INI flag. This flag is used during the 635 * subsequent device initialization walk to avoid entire subtrees 636 * that do not contain an _INI. 637 * 638 ******************************************************************************/ 639 640 static ACPI_STATUS 641 AcpiNsFindIniMethods ( 642 ACPI_HANDLE ObjHandle, 643 UINT32 NestingLevel, 644 void *Context, 645 void **ReturnValue) 646 { 647 ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); 648 ACPI_NAMESPACE_NODE *Node; 649 ACPI_NAMESPACE_NODE *ParentNode; 650 651 652 /* Keep count of device/processor/thermal objects */ 653 654 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 655 if ((Node->Type == ACPI_TYPE_DEVICE) || 656 (Node->Type == ACPI_TYPE_PROCESSOR) || 657 (Node->Type == ACPI_TYPE_THERMAL)) 658 { 659 Info->DeviceCount++; 660 return (AE_OK); 661 } 662 663 /* We are only looking for methods named _INI */ 664 665 if (!ACPI_COMPARE_NAME (Node->Name.Ascii, METHOD_NAME__INI)) 666 { 667 return (AE_OK); 668 } 669 670 /* 671 * The only _INI methods that we care about are those that are 672 * present under Device, Processor, and Thermal objects. 673 */ 674 ParentNode = Node->Parent; 675 switch (ParentNode->Type) 676 { 677 case ACPI_TYPE_DEVICE: 678 case ACPI_TYPE_PROCESSOR: 679 case ACPI_TYPE_THERMAL: 680 681 /* Mark parent and bubble up the INI present flag to the root */ 682 683 while (ParentNode) 684 { 685 ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI; 686 ParentNode = ParentNode->Parent; 687 } 688 break; 689 690 default: 691 692 break; 693 } 694 695 return (AE_OK); 696 } 697 698 699 /******************************************************************************* 700 * 701 * FUNCTION: AcpiNsInitOneDevice 702 * 703 * PARAMETERS: ACPI_WALK_CALLBACK 704 * 705 * RETURN: ACPI_STATUS 706 * 707 * DESCRIPTION: This is called once per device soon after ACPI is enabled 708 * to initialize each device. It determines if the device is 709 * present, and if so, calls _INI. 710 * 711 ******************************************************************************/ 712 713 static ACPI_STATUS 714 AcpiNsInitOneDevice ( 715 ACPI_HANDLE ObjHandle, 716 UINT32 NestingLevel, 717 void *Context, 718 void **ReturnValue) 719 { 720 ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); 721 ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo; 722 UINT32 Flags; 723 ACPI_STATUS Status; 724 ACPI_NAMESPACE_NODE *DeviceNode; 725 726 727 ACPI_FUNCTION_TRACE (NsInitOneDevice); 728 729 730 /* We are interested in Devices, Processors and ThermalZones only */ 731 732 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 733 if ((DeviceNode->Type != ACPI_TYPE_DEVICE) && 734 (DeviceNode->Type != ACPI_TYPE_PROCESSOR) && 735 (DeviceNode->Type != ACPI_TYPE_THERMAL)) 736 { 737 return_ACPI_STATUS (AE_OK); 738 } 739 740 /* 741 * Because of an earlier namespace analysis, all subtrees that contain an 742 * _INI method are tagged. 743 * 744 * If this device subtree does not contain any _INI methods, we 745 * can exit now and stop traversing this entire subtree. 746 */ 747 if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI)) 748 { 749 return_ACPI_STATUS (AE_CTRL_DEPTH); 750 } 751 752 /* 753 * Run _STA to determine if this device is present and functioning. We 754 * must know this information for two important reasons (from ACPI spec): 755 * 756 * 1) We can only run _INI if the device is present. 757 * 2) We must abort the device tree walk on this subtree if the device is 758 * not present and is not functional (we will not examine the children) 759 * 760 * The _STA method is not required to be present under the device, we 761 * assume the device is present if _STA does not exist. 762 */ 763 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( 764 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA)); 765 766 Status = AcpiUtExecute_STA (DeviceNode, &Flags); 767 if (ACPI_FAILURE (Status)) 768 { 769 /* Ignore error and move on to next device */ 770 771 return_ACPI_STATUS (AE_OK); 772 } 773 774 /* 775 * Flags == -1 means that _STA was not found. In this case, we assume that 776 * the device is both present and functional. 777 * 778 * From the ACPI spec, description of _STA: 779 * 780 * "If a device object (including the processor object) does not have an 781 * _STA object, then OSPM assumes that all of the above bits are set (in 782 * other words, the device is present, ..., and functioning)" 783 */ 784 if (Flags != ACPI_UINT32_MAX) 785 { 786 WalkInfo->Num_STA++; 787 } 788 789 /* 790 * Examine the PRESENT and FUNCTIONING status bits 791 * 792 * Note: ACPI spec does not seem to specify behavior for the present but 793 * not functioning case, so we assume functioning if present. 794 */ 795 if (!(Flags & ACPI_STA_DEVICE_PRESENT)) 796 { 797 /* Device is not present, we must examine the Functioning bit */ 798 799 if (Flags & ACPI_STA_DEVICE_FUNCTIONING) 800 { 801 /* 802 * Device is not present but is "functioning". In this case, 803 * we will not run _INI, but we continue to examine the children 804 * of this device. 805 * 806 * From the ACPI spec, description of _STA: (Note - no mention 807 * of whether to run _INI or not on the device in question) 808 * 809 * "_STA may return bit 0 clear (not present) with bit 3 set 810 * (device is functional). This case is used to indicate a valid 811 * device for which no device driver should be loaded (for example, 812 * a bridge device.) Children of this device may be present and 813 * valid. OSPM should continue enumeration below a device whose 814 * _STA returns this bit combination" 815 */ 816 return_ACPI_STATUS (AE_OK); 817 } 818 else 819 { 820 /* 821 * Device is not present and is not functioning. We must abort the 822 * walk of this subtree immediately -- don't look at the children 823 * of such a device. 824 * 825 * From the ACPI spec, description of _INI: 826 * 827 * "If the _STA method indicates that the device is not present, 828 * OSPM will not run the _INI and will not examine the children 829 * of the device for _INI methods" 830 */ 831 return_ACPI_STATUS (AE_CTRL_DEPTH); 832 } 833 } 834 835 /* 836 * The device is present or is assumed present if no _STA exists. 837 * Run the _INI if it exists (not required to exist) 838 * 839 * Note: We know there is an _INI within this subtree, but it may not be 840 * under this particular device, it may be lower in the branch. 841 */ 842 if (!ACPI_COMPARE_NAME (DeviceNode->Name.Ascii, "_SB_") || 843 DeviceNode->Parent != AcpiGbl_RootNode) 844 { 845 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( 846 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI)); 847 848 memset (Info, 0, sizeof (ACPI_EVALUATE_INFO)); 849 Info->PrefixNode = DeviceNode; 850 Info->RelativePathname = METHOD_NAME__INI; 851 Info->Parameters = NULL; 852 Info->Flags = ACPI_IGNORE_RETURN_VALUE; 853 854 Status = AcpiNsEvaluate (Info); 855 if (ACPI_SUCCESS (Status)) 856 { 857 WalkInfo->Num_INI++; 858 } 859 860 #ifdef ACPI_DEBUG_OUTPUT 861 else if (Status != AE_NOT_FOUND) 862 { 863 /* Ignore error and move on to next device */ 864 865 char *ScopeName = AcpiNsGetNormalizedPathname (DeviceNode, TRUE); 866 867 ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution", 868 ScopeName)); 869 ACPI_FREE (ScopeName); 870 } 871 #endif 872 } 873 874 /* Ignore errors from above */ 875 876 Status = AE_OK; 877 878 /* 879 * The _INI method has been run if present; call the Global Initialization 880 * Handler for this device. 881 */ 882 if (AcpiGbl_InitHandler) 883 { 884 Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI); 885 } 886 887 return_ACPI_STATUS (Status); 888 } 889