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 - 2019, 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 <contrib/dev/acpica/include/acpi.h> 153 #include <contrib/dev/acpica/include/accommon.h> 154 #include <contrib/dev/acpica/include/acnamesp.h> 155 #include <contrib/dev/acpica/include/acdispat.h> 156 #include <contrib/dev/acpica/include/acinterp.h> 157 #include <contrib/dev/acpica/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 "Final data object initialization: ")); 216 217 /* Clear the info block */ 218 219 memset (&Info, 0, sizeof (ACPI_INIT_WALK_INFO)); 220 221 /* Walk entire namespace from the supplied root */ 222 223 /* 224 * TBD: will become ACPI_TYPE_PACKAGE as this type object 225 * is now the only one that supports deferred initialization 226 * (forward references). 227 */ 228 Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 229 ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL, &Info, NULL); 230 if (ACPI_FAILURE (Status)) 231 { 232 ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace")); 233 } 234 235 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 236 "Namespace contains %u (0x%X) objects\n", 237 Info.ObjectCount, 238 Info.ObjectCount)); 239 240 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 241 "%u Control Methods found\n%u Op Regions found\n", 242 Info.MethodCount, Info.OpRegionCount)); 243 244 return_ACPI_STATUS (AE_OK); 245 } 246 247 248 /******************************************************************************* 249 * 250 * FUNCTION: AcpiNsInitializeDevices 251 * 252 * PARAMETERS: None 253 * 254 * RETURN: ACPI_STATUS 255 * 256 * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. 257 * This means running _INI on all present devices. 258 * 259 * Note: We install PCI config space handler on region access, 260 * not here. 261 * 262 ******************************************************************************/ 263 264 ACPI_STATUS 265 AcpiNsInitializeDevices ( 266 UINT32 Flags) 267 { 268 ACPI_STATUS Status = AE_OK; 269 ACPI_DEVICE_WALK_INFO Info; 270 ACPI_HANDLE Handle; 271 272 273 ACPI_FUNCTION_TRACE (NsInitializeDevices); 274 275 276 if (!(Flags & ACPI_NO_DEVICE_INIT)) 277 { 278 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 279 "[Init] Initializing ACPI Devices\n")); 280 281 /* Init counters */ 282 283 Info.DeviceCount = 0; 284 Info.Num_STA = 0; 285 Info.Num_INI = 0; 286 287 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 288 "Initializing Device/Processor/Thermal objects " 289 "and executing _INI/_STA methods:\n")); 290 291 /* Tree analysis: find all subtrees that contain _INI methods */ 292 293 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 294 ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL); 295 if (ACPI_FAILURE (Status)) 296 { 297 goto ErrorExit; 298 } 299 300 /* Allocate the evaluation information block */ 301 302 Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); 303 if (!Info.EvaluateInfo) 304 { 305 Status = AE_NO_MEMORY; 306 goto ErrorExit; 307 } 308 309 /* 310 * Execute the "global" _INI method that may appear at the root. 311 * This support is provided for Windows compatibility (Vista+) and 312 * is not part of the ACPI specification. 313 */ 314 Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode; 315 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI; 316 Info.EvaluateInfo->Parameters = NULL; 317 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE; 318 319 Status = AcpiNsEvaluate (Info.EvaluateInfo); 320 if (ACPI_SUCCESS (Status)) 321 { 322 Info.Num_INI++; 323 } 324 325 /* 326 * Execute \_SB._INI. 327 * There appears to be a strict order requirement for \_SB._INI, 328 * which should be evaluated before any _REG evaluations. 329 */ 330 Status = AcpiGetHandle (NULL, "\\_SB", &Handle); 331 if (ACPI_SUCCESS (Status)) 332 { 333 memset (Info.EvaluateInfo, 0, sizeof (ACPI_EVALUATE_INFO)); 334 Info.EvaluateInfo->PrefixNode = Handle; 335 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI; 336 Info.EvaluateInfo->Parameters = NULL; 337 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE; 338 339 Status = AcpiNsEvaluate (Info.EvaluateInfo); 340 if (ACPI_SUCCESS (Status)) 341 { 342 Info.Num_INI++; 343 } 344 } 345 } 346 347 /* 348 * Run all _REG methods 349 * 350 * Note: Any objects accessed by the _REG methods will be automatically 351 * initialized, even if they contain executable AML (see the call to 352 * AcpiNsInitializeObjects below). 353 * 354 * Note: According to the ACPI specification, we actually needn't execute 355 * _REG for SystemMemory/SystemIo operation regions, but for PCI_Config 356 * operation regions, it is required to evaluate _REG for those on a PCI 357 * root bus that doesn't contain _BBN object. So this code is kept here 358 * in order not to break things. 359 */ 360 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT)) 361 { 362 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 363 "[Init] Executing _REG OpRegion methods\n")); 364 365 Status = AcpiEvInitializeOpRegions (); 366 if (ACPI_FAILURE (Status)) 367 { 368 goto ErrorExit; 369 } 370 } 371 372 if (!(Flags & ACPI_NO_DEVICE_INIT)) 373 { 374 /* Walk namespace to execute all _INIs on present devices */ 375 376 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 377 ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL); 378 379 /* 380 * Any _OSI requests should be completed by now. If the BIOS has 381 * requested any Windows OSI strings, we will always truncate 382 * I/O addresses to 16 bits -- for Windows compatibility. 383 */ 384 if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000) 385 { 386 AcpiGbl_TruncateIoAddresses = TRUE; 387 } 388 389 ACPI_FREE (Info.EvaluateInfo); 390 if (ACPI_FAILURE (Status)) 391 { 392 goto ErrorExit; 393 } 394 395 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 396 " Executed %u _INI methods requiring %u _STA executions " 397 "(examined %u objects)\n", 398 Info.Num_INI, Info.Num_STA, Info.DeviceCount)); 399 } 400 401 return_ACPI_STATUS (Status); 402 403 404 ErrorExit: 405 ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization")); 406 return_ACPI_STATUS (Status); 407 } 408 409 410 /******************************************************************************* 411 * 412 * FUNCTION: AcpiNsInitOnePackage 413 * 414 * PARAMETERS: ObjHandle - Node 415 * Level - Current nesting level 416 * Context - Not used 417 * ReturnValue - Not used 418 * 419 * RETURN: Status 420 * 421 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every package 422 * within the namespace. Used during dynamic load of an SSDT. 423 * 424 ******************************************************************************/ 425 426 ACPI_STATUS 427 AcpiNsInitOnePackage ( 428 ACPI_HANDLE ObjHandle, 429 UINT32 Level, 430 void *Context, 431 void **ReturnValue) 432 { 433 ACPI_STATUS Status; 434 ACPI_OPERAND_OBJECT *ObjDesc; 435 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; 436 437 438 ObjDesc = AcpiNsGetAttachedObject (Node); 439 if (!ObjDesc) 440 { 441 return (AE_OK); 442 } 443 444 /* Exit if package is already initialized */ 445 446 if (ObjDesc->Package.Flags & AOPOBJ_DATA_VALID) 447 { 448 return (AE_OK); 449 } 450 451 Status = AcpiDsGetPackageArguments (ObjDesc); 452 if (ACPI_FAILURE (Status)) 453 { 454 return (AE_OK); 455 } 456 457 Status = AcpiUtWalkPackageTree (ObjDesc, NULL, AcpiDsInitPackageElement, 458 NULL); 459 if (ACPI_FAILURE (Status)) 460 { 461 return (AE_OK); 462 } 463 464 ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID; 465 return (AE_OK); 466 } 467 468 469 /******************************************************************************* 470 * 471 * FUNCTION: AcpiNsInitOneObject 472 * 473 * PARAMETERS: ObjHandle - Node 474 * Level - Current nesting level 475 * Context - Points to a init info struct 476 * ReturnValue - Not used 477 * 478 * RETURN: Status 479 * 480 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object 481 * within the namespace. 482 * 483 * Currently, the only objects that require initialization are: 484 * 1) Methods 485 * 2) Op Regions 486 * 487 ******************************************************************************/ 488 489 static ACPI_STATUS 490 AcpiNsInitOneObject ( 491 ACPI_HANDLE ObjHandle, 492 UINT32 Level, 493 void *Context, 494 void **ReturnValue) 495 { 496 ACPI_OBJECT_TYPE Type; 497 ACPI_STATUS Status = AE_OK; 498 ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context; 499 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; 500 ACPI_OPERAND_OBJECT *ObjDesc; 501 502 503 ACPI_FUNCTION_NAME (NsInitOneObject); 504 505 506 Info->ObjectCount++; 507 508 /* And even then, we are only interested in a few object types */ 509 510 Type = AcpiNsGetType (ObjHandle); 511 ObjDesc = AcpiNsGetAttachedObject (Node); 512 if (!ObjDesc) 513 { 514 return (AE_OK); 515 } 516 517 /* Increment counters for object types we are looking for */ 518 519 switch (Type) 520 { 521 case ACPI_TYPE_REGION: 522 523 Info->OpRegionCount++; 524 break; 525 526 case ACPI_TYPE_BUFFER_FIELD: 527 528 Info->FieldCount++; 529 break; 530 531 case ACPI_TYPE_LOCAL_BANK_FIELD: 532 533 Info->FieldCount++; 534 break; 535 536 case ACPI_TYPE_BUFFER: 537 538 Info->BufferCount++; 539 break; 540 541 case ACPI_TYPE_PACKAGE: 542 543 Info->PackageCount++; 544 break; 545 546 default: 547 548 /* No init required, just exit now */ 549 550 return (AE_OK); 551 } 552 553 /* If the object is already initialized, nothing else to do */ 554 555 if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID) 556 { 557 return (AE_OK); 558 } 559 560 /* Must lock the interpreter before executing AML code */ 561 562 AcpiExEnterInterpreter (); 563 564 /* 565 * Only initialization of Package objects can be deferred, in order 566 * to support forward references. 567 */ 568 switch (Type) 569 { 570 case ACPI_TYPE_LOCAL_BANK_FIELD: 571 572 /* TBD: BankFields do not require deferred init, remove this code */ 573 574 Info->FieldInit++; 575 Status = AcpiDsGetBankFieldArguments (ObjDesc); 576 break; 577 578 case ACPI_TYPE_PACKAGE: 579 580 /* Complete the initialization/resolution of the package object */ 581 582 Info->PackageInit++; 583 Status = AcpiNsInitOnePackage (ObjHandle, Level, NULL, NULL); 584 break; 585 586 default: 587 588 /* No other types should get here */ 589 590 Status = AE_TYPE; 591 ACPI_EXCEPTION ((AE_INFO, Status, 592 "Opcode is not deferred [%4.4s] (%s)", 593 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type))); 594 break; 595 } 596 597 if (ACPI_FAILURE (Status)) 598 { 599 ACPI_EXCEPTION ((AE_INFO, Status, 600 "Could not execute arguments for [%4.4s] (%s)", 601 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type))); 602 } 603 604 /* 605 * We ignore errors from above, and always return OK, since we don't want 606 * to abort the walk on any single error. 607 */ 608 AcpiExExitInterpreter (); 609 return (AE_OK); 610 } 611 612 613 /******************************************************************************* 614 * 615 * FUNCTION: AcpiNsFindIniMethods 616 * 617 * PARAMETERS: ACPI_WALK_CALLBACK 618 * 619 * RETURN: ACPI_STATUS 620 * 621 * DESCRIPTION: Called during namespace walk. Finds objects named _INI under 622 * device/processor/thermal objects, and marks the entire subtree 623 * with a SUBTREE_HAS_INI flag. This flag is used during the 624 * subsequent device initialization walk to avoid entire subtrees 625 * that do not contain an _INI. 626 * 627 ******************************************************************************/ 628 629 static ACPI_STATUS 630 AcpiNsFindIniMethods ( 631 ACPI_HANDLE ObjHandle, 632 UINT32 NestingLevel, 633 void *Context, 634 void **ReturnValue) 635 { 636 ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); 637 ACPI_NAMESPACE_NODE *Node; 638 ACPI_NAMESPACE_NODE *ParentNode; 639 640 641 /* Keep count of device/processor/thermal objects */ 642 643 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 644 if ((Node->Type == ACPI_TYPE_DEVICE) || 645 (Node->Type == ACPI_TYPE_PROCESSOR) || 646 (Node->Type == ACPI_TYPE_THERMAL)) 647 { 648 Info->DeviceCount++; 649 return (AE_OK); 650 } 651 652 /* We are only looking for methods named _INI */ 653 654 if (!ACPI_COMPARE_NAMESEG (Node->Name.Ascii, METHOD_NAME__INI)) 655 { 656 return (AE_OK); 657 } 658 659 /* 660 * The only _INI methods that we care about are those that are 661 * present under Device, Processor, and Thermal objects. 662 */ 663 ParentNode = Node->Parent; 664 switch (ParentNode->Type) 665 { 666 case ACPI_TYPE_DEVICE: 667 case ACPI_TYPE_PROCESSOR: 668 case ACPI_TYPE_THERMAL: 669 670 /* Mark parent and bubble up the INI present flag to the root */ 671 672 while (ParentNode) 673 { 674 ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI; 675 ParentNode = ParentNode->Parent; 676 } 677 break; 678 679 default: 680 681 break; 682 } 683 684 return (AE_OK); 685 } 686 687 688 /******************************************************************************* 689 * 690 * FUNCTION: AcpiNsInitOneDevice 691 * 692 * PARAMETERS: ACPI_WALK_CALLBACK 693 * 694 * RETURN: ACPI_STATUS 695 * 696 * DESCRIPTION: This is called once per device soon after ACPI is enabled 697 * to initialize each device. It determines if the device is 698 * present, and if so, calls _INI. 699 * 700 ******************************************************************************/ 701 702 static ACPI_STATUS 703 AcpiNsInitOneDevice ( 704 ACPI_HANDLE ObjHandle, 705 UINT32 NestingLevel, 706 void *Context, 707 void **ReturnValue) 708 { 709 ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); 710 ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo; 711 UINT32 Flags; 712 ACPI_STATUS Status; 713 ACPI_NAMESPACE_NODE *DeviceNode; 714 715 716 ACPI_FUNCTION_TRACE (NsInitOneDevice); 717 718 719 /* We are interested in Devices, Processors and ThermalZones only */ 720 721 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 722 if ((DeviceNode->Type != ACPI_TYPE_DEVICE) && 723 (DeviceNode->Type != ACPI_TYPE_PROCESSOR) && 724 (DeviceNode->Type != ACPI_TYPE_THERMAL)) 725 { 726 return_ACPI_STATUS (AE_OK); 727 } 728 729 /* 730 * Because of an earlier namespace analysis, all subtrees that contain an 731 * _INI method are tagged. 732 * 733 * If this device subtree does not contain any _INI methods, we 734 * can exit now and stop traversing this entire subtree. 735 */ 736 if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI)) 737 { 738 return_ACPI_STATUS (AE_CTRL_DEPTH); 739 } 740 741 /* 742 * Run _STA to determine if this device is present and functioning. We 743 * must know this information for two important reasons (from ACPI spec): 744 * 745 * 1) We can only run _INI if the device is present. 746 * 2) We must abort the device tree walk on this subtree if the device is 747 * not present and is not functional (we will not examine the children) 748 * 749 * The _STA method is not required to be present under the device, we 750 * assume the device is present if _STA does not exist. 751 */ 752 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( 753 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA)); 754 755 Status = AcpiUtExecute_STA (DeviceNode, &Flags); 756 if (ACPI_FAILURE (Status)) 757 { 758 /* Ignore error and move on to next device */ 759 760 return_ACPI_STATUS (AE_OK); 761 } 762 763 /* 764 * Flags == -1 means that _STA was not found. In this case, we assume that 765 * the device is both present and functional. 766 * 767 * From the ACPI spec, description of _STA: 768 * 769 * "If a device object (including the processor object) does not have an 770 * _STA object, then OSPM assumes that all of the above bits are set (in 771 * other words, the device is present, ..., and functioning)" 772 */ 773 if (Flags != ACPI_UINT32_MAX) 774 { 775 WalkInfo->Num_STA++; 776 } 777 778 /* 779 * Examine the PRESENT and FUNCTIONING status bits 780 * 781 * Note: ACPI spec does not seem to specify behavior for the present but 782 * not functioning case, so we assume functioning if present. 783 */ 784 if (!(Flags & ACPI_STA_DEVICE_PRESENT)) 785 { 786 /* Device is not present, we must examine the Functioning bit */ 787 788 if (Flags & ACPI_STA_DEVICE_FUNCTIONING) 789 { 790 /* 791 * Device is not present but is "functioning". In this case, 792 * we will not run _INI, but we continue to examine the children 793 * of this device. 794 * 795 * From the ACPI spec, description of _STA: (Note - no mention 796 * of whether to run _INI or not on the device in question) 797 * 798 * "_STA may return bit 0 clear (not present) with bit 3 set 799 * (device is functional). This case is used to indicate a valid 800 * device for which no device driver should be loaded (for example, 801 * a bridge device.) Children of this device may be present and 802 * valid. OSPM should continue enumeration below a device whose 803 * _STA returns this bit combination" 804 */ 805 return_ACPI_STATUS (AE_OK); 806 } 807 else 808 { 809 /* 810 * Device is not present and is not functioning. We must abort the 811 * walk of this subtree immediately -- don't look at the children 812 * of such a device. 813 * 814 * From the ACPI spec, description of _INI: 815 * 816 * "If the _STA method indicates that the device is not present, 817 * OSPM will not run the _INI and will not examine the children 818 * of the device for _INI methods" 819 */ 820 return_ACPI_STATUS (AE_CTRL_DEPTH); 821 } 822 } 823 824 /* 825 * The device is present or is assumed present if no _STA exists. 826 * Run the _INI if it exists (not required to exist) 827 * 828 * Note: We know there is an _INI within this subtree, but it may not be 829 * under this particular device, it may be lower in the branch. 830 */ 831 if (!ACPI_COMPARE_NAMESEG (DeviceNode->Name.Ascii, "_SB_") || 832 DeviceNode->Parent != AcpiGbl_RootNode) 833 { 834 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( 835 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI)); 836 837 memset (Info, 0, sizeof (ACPI_EVALUATE_INFO)); 838 Info->PrefixNode = DeviceNode; 839 Info->RelativePathname = METHOD_NAME__INI; 840 Info->Parameters = NULL; 841 Info->Flags = ACPI_IGNORE_RETURN_VALUE; 842 843 Status = AcpiNsEvaluate (Info); 844 if (ACPI_SUCCESS (Status)) 845 { 846 WalkInfo->Num_INI++; 847 } 848 849 #ifdef ACPI_DEBUG_OUTPUT 850 else if (Status != AE_NOT_FOUND) 851 { 852 /* Ignore error and move on to next device */ 853 854 char *ScopeName = AcpiNsGetNormalizedPathname (DeviceNode, TRUE); 855 856 ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution", 857 ScopeName)); 858 ACPI_FREE (ScopeName); 859 } 860 #endif 861 } 862 863 /* Ignore errors from above */ 864 865 Status = AE_OK; 866 867 /* 868 * The _INI method has been run if present; call the Global Initialization 869 * Handler for this device. 870 */ 871 if (AcpiGbl_InitHandler) 872 { 873 Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI); 874 } 875 876 return_ACPI_STATUS (Status); 877 } 878