1 /****************************************************************************** 2 * 3 * Module Name: evrgnini- ACPI AddressSpace (OpRegion) init 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/acevents.h> 155 #include <contrib/dev/acpica/include/acnamesp.h> 156 #include <contrib/dev/acpica/include/acinterp.h> 157 158 #define _COMPONENT ACPI_EVENTS 159 ACPI_MODULE_NAME ("evrgnini") 160 161 162 /******************************************************************************* 163 * 164 * FUNCTION: AcpiEvSystemMemoryRegionSetup 165 * 166 * PARAMETERS: Handle - Region we are interested in 167 * Function - Start or stop 168 * HandlerContext - Address space handler context 169 * RegionContext - Region specific context 170 * 171 * RETURN: Status 172 * 173 * DESCRIPTION: Setup a SystemMemory operation region 174 * 175 ******************************************************************************/ 176 177 ACPI_STATUS 178 AcpiEvSystemMemoryRegionSetup ( 179 ACPI_HANDLE Handle, 180 UINT32 Function, 181 void *HandlerContext, 182 void **RegionContext) 183 { 184 ACPI_OPERAND_OBJECT *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle; 185 ACPI_MEM_SPACE_CONTEXT *LocalRegionContext; 186 187 188 ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup); 189 190 191 if (Function == ACPI_REGION_DEACTIVATE) 192 { 193 if (*RegionContext) 194 { 195 LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext; 196 197 /* Delete a cached mapping if present */ 198 199 if (LocalRegionContext->MappedLength) 200 { 201 AcpiOsUnmapMemory (LocalRegionContext->MappedLogicalAddress, 202 LocalRegionContext->MappedLength); 203 } 204 ACPI_FREE (LocalRegionContext); 205 *RegionContext = NULL; 206 } 207 return_ACPI_STATUS (AE_OK); 208 } 209 210 /* Create a new context */ 211 212 LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT)); 213 if (!(LocalRegionContext)) 214 { 215 return_ACPI_STATUS (AE_NO_MEMORY); 216 } 217 218 /* Save the region length and address for use in the handler */ 219 220 LocalRegionContext->Length = RegionDesc->Region.Length; 221 LocalRegionContext->Address = RegionDesc->Region.Address; 222 223 *RegionContext = LocalRegionContext; 224 return_ACPI_STATUS (AE_OK); 225 } 226 227 228 /******************************************************************************* 229 * 230 * FUNCTION: AcpiEvIoSpaceRegionSetup 231 * 232 * PARAMETERS: Handle - Region we are interested in 233 * Function - Start or stop 234 * HandlerContext - Address space handler context 235 * RegionContext - Region specific context 236 * 237 * RETURN: Status 238 * 239 * DESCRIPTION: Setup a IO operation region 240 * 241 ******************************************************************************/ 242 243 ACPI_STATUS 244 AcpiEvIoSpaceRegionSetup ( 245 ACPI_HANDLE Handle, 246 UINT32 Function, 247 void *HandlerContext, 248 void **RegionContext) 249 { 250 ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup); 251 252 253 if (Function == ACPI_REGION_DEACTIVATE) 254 { 255 *RegionContext = NULL; 256 } 257 else 258 { 259 *RegionContext = HandlerContext; 260 } 261 262 return_ACPI_STATUS (AE_OK); 263 } 264 265 266 /******************************************************************************* 267 * 268 * FUNCTION: AcpiEvPciConfigRegionSetup 269 * 270 * PARAMETERS: Handle - Region we are interested in 271 * Function - Start or stop 272 * HandlerContext - Address space handler context 273 * RegionContext - Region specific context 274 * 275 * RETURN: Status 276 * 277 * DESCRIPTION: Setup a PCI_Config operation region 278 * 279 * MUTEX: Assumes namespace is not locked 280 * 281 ******************************************************************************/ 282 283 ACPI_STATUS 284 AcpiEvPciConfigRegionSetup ( 285 ACPI_HANDLE Handle, 286 UINT32 Function, 287 void *HandlerContext, 288 void **RegionContext) 289 { 290 ACPI_STATUS Status = AE_OK; 291 UINT64 PciValue; 292 ACPI_PCI_ID *PciId = *RegionContext; 293 ACPI_OPERAND_OBJECT *HandlerObj; 294 ACPI_NAMESPACE_NODE *ParentNode; 295 ACPI_NAMESPACE_NODE *PciRootNode; 296 ACPI_NAMESPACE_NODE *PciDeviceNode; 297 ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle; 298 299 300 ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup); 301 302 303 HandlerObj = RegionObj->Region.Handler; 304 if (!HandlerObj) 305 { 306 /* 307 * No installed handler. This shouldn't happen because the dispatch 308 * routine checks before we get here, but we check again just in case. 309 */ 310 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 311 "Attempting to init a region %p, with no handler\n", RegionObj)); 312 return_ACPI_STATUS (AE_NOT_EXIST); 313 } 314 315 *RegionContext = NULL; 316 if (Function == ACPI_REGION_DEACTIVATE) 317 { 318 if (PciId) 319 { 320 ACPI_FREE (PciId); 321 } 322 return_ACPI_STATUS (Status); 323 } 324 325 ParentNode = RegionObj->Region.Node->Parent; 326 327 /* 328 * Get the _SEG and _BBN values from the device upon which the handler 329 * is installed. 330 * 331 * We need to get the _SEG and _BBN objects relative to the PCI BUS device. 332 * This is the device the handler has been registered to handle. 333 */ 334 335 /* 336 * If the AddressSpace.Node is still pointing to the root, we need 337 * to scan upward for a PCI Root bridge and re-associate the OpRegion 338 * handlers with that device. 339 */ 340 if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode) 341 { 342 /* Start search from the parent object */ 343 344 PciRootNode = ParentNode; 345 while (PciRootNode != AcpiGbl_RootNode) 346 { 347 /* Get the _HID/_CID in order to detect a RootBridge */ 348 349 if (AcpiEvIsPciRootBridge (PciRootNode)) 350 { 351 /* Install a handler for this PCI root bridge */ 352 353 Status = AcpiInstallAddressSpaceHandler ( 354 (ACPI_HANDLE) PciRootNode, 355 ACPI_ADR_SPACE_PCI_CONFIG, 356 ACPI_DEFAULT_HANDLER, NULL, NULL); 357 if (ACPI_FAILURE (Status)) 358 { 359 if (Status == AE_SAME_HANDLER) 360 { 361 /* 362 * It is OK if the handler is already installed on the 363 * root bridge. Still need to return a context object 364 * for the new PCI_Config operation region, however. 365 */ 366 Status = AE_OK; 367 } 368 else 369 { 370 ACPI_EXCEPTION ((AE_INFO, Status, 371 "Could not install PciConfig handler " 372 "for Root Bridge %4.4s", 373 AcpiUtGetNodeName (PciRootNode))); 374 } 375 } 376 break; 377 } 378 379 PciRootNode = PciRootNode->Parent; 380 } 381 382 /* PCI root bridge not found, use namespace root node */ 383 } 384 else 385 { 386 PciRootNode = HandlerObj->AddressSpace.Node; 387 } 388 389 /* 390 * If this region is now initialized, we are done. 391 * (InstallAddressSpaceHandler could have initialized it) 392 */ 393 if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE) 394 { 395 return_ACPI_STATUS (AE_OK); 396 } 397 398 /* Region is still not initialized. Create a new context */ 399 400 PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID)); 401 if (!PciId) 402 { 403 return_ACPI_STATUS (AE_NO_MEMORY); 404 } 405 406 /* 407 * For PCI_Config space access, we need the segment, bus, device and 408 * function numbers. Acquire them here. 409 * 410 * Find the parent device object. (This allows the operation region to be 411 * within a subscope under the device, such as a control method.) 412 */ 413 PciDeviceNode = RegionObj->Region.Node; 414 while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE)) 415 { 416 PciDeviceNode = PciDeviceNode->Parent; 417 } 418 419 if (!PciDeviceNode) 420 { 421 ACPI_FREE (PciId); 422 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 423 } 424 425 /* 426 * Get the PCI device and function numbers from the _ADR object 427 * contained in the parent's scope. 428 */ 429 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, 430 PciDeviceNode, &PciValue); 431 432 /* 433 * The default is zero, and since the allocation above zeroed the data, 434 * just do nothing on failure. 435 */ 436 if (ACPI_SUCCESS (Status)) 437 { 438 PciId->Device = ACPI_HIWORD (ACPI_LODWORD (PciValue)); 439 PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue)); 440 } 441 442 /* The PCI segment number comes from the _SEG method */ 443 444 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG, 445 PciRootNode, &PciValue); 446 if (ACPI_SUCCESS (Status)) 447 { 448 PciId->Segment = ACPI_LOWORD (PciValue); 449 } 450 451 /* The PCI bus number comes from the _BBN method */ 452 453 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN, 454 PciRootNode, &PciValue); 455 if (ACPI_SUCCESS (Status)) 456 { 457 PciId->Bus = ACPI_LOWORD (PciValue); 458 } 459 460 /* Complete/update the PCI ID for this device */ 461 462 Status = AcpiHwDerivePciId (PciId, PciRootNode, RegionObj->Region.Node); 463 if (ACPI_FAILURE (Status)) 464 { 465 ACPI_FREE (PciId); 466 return_ACPI_STATUS (Status); 467 } 468 469 *RegionContext = PciId; 470 return_ACPI_STATUS (AE_OK); 471 } 472 473 474 /******************************************************************************* 475 * 476 * FUNCTION: AcpiEvIsPciRootBridge 477 * 478 * PARAMETERS: Node - Device node being examined 479 * 480 * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge 481 * 482 * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by 483 * examining the _HID and _CID for the device. 484 * 485 ******************************************************************************/ 486 487 BOOLEAN 488 AcpiEvIsPciRootBridge ( 489 ACPI_NAMESPACE_NODE *Node) 490 { 491 ACPI_STATUS Status; 492 ACPI_PNP_DEVICE_ID *Hid; 493 ACPI_PNP_DEVICE_ID_LIST *Cid; 494 UINT32 i; 495 BOOLEAN Match; 496 497 498 /* Get the _HID and check for a PCI Root Bridge */ 499 500 Status = AcpiUtExecute_HID (Node, &Hid); 501 if (ACPI_FAILURE (Status)) 502 { 503 return (FALSE); 504 } 505 506 Match = AcpiUtIsPciRootBridge (Hid->String); 507 ACPI_FREE (Hid); 508 509 if (Match) 510 { 511 return (TRUE); 512 } 513 514 /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */ 515 516 Status = AcpiUtExecute_CID (Node, &Cid); 517 if (ACPI_FAILURE (Status)) 518 { 519 return (FALSE); 520 } 521 522 /* Check all _CIDs in the returned list */ 523 524 for (i = 0; i < Cid->Count; i++) 525 { 526 if (AcpiUtIsPciRootBridge (Cid->Ids[i].String)) 527 { 528 ACPI_FREE (Cid); 529 return (TRUE); 530 } 531 } 532 533 ACPI_FREE (Cid); 534 return (FALSE); 535 } 536 537 538 /******************************************************************************* 539 * 540 * FUNCTION: AcpiEvPciBarRegionSetup 541 * 542 * PARAMETERS: Handle - Region we are interested in 543 * Function - Start or stop 544 * HandlerContext - Address space handler context 545 * RegionContext - Region specific context 546 * 547 * RETURN: Status 548 * 549 * DESCRIPTION: Setup a PciBAR operation region 550 * 551 * MUTEX: Assumes namespace is not locked 552 * 553 ******************************************************************************/ 554 555 ACPI_STATUS 556 AcpiEvPciBarRegionSetup ( 557 ACPI_HANDLE Handle, 558 UINT32 Function, 559 void *HandlerContext, 560 void **RegionContext) 561 { 562 ACPI_FUNCTION_TRACE (EvPciBarRegionSetup); 563 564 565 return_ACPI_STATUS (AE_OK); 566 } 567 568 569 /******************************************************************************* 570 * 571 * FUNCTION: AcpiEvCmosRegionSetup 572 * 573 * PARAMETERS: Handle - Region we are interested in 574 * Function - Start or stop 575 * HandlerContext - Address space handler context 576 * RegionContext - Region specific context 577 * 578 * RETURN: Status 579 * 580 * DESCRIPTION: Setup a CMOS operation region 581 * 582 * MUTEX: Assumes namespace is not locked 583 * 584 ******************************************************************************/ 585 586 ACPI_STATUS 587 AcpiEvCmosRegionSetup ( 588 ACPI_HANDLE Handle, 589 UINT32 Function, 590 void *HandlerContext, 591 void **RegionContext) 592 { 593 ACPI_FUNCTION_TRACE (EvCmosRegionSetup); 594 595 596 return_ACPI_STATUS (AE_OK); 597 } 598 599 600 /******************************************************************************* 601 * 602 * FUNCTION: AcpiEvDefaultRegionSetup 603 * 604 * PARAMETERS: Handle - Region we are interested in 605 * Function - Start or stop 606 * HandlerContext - Address space handler context 607 * RegionContext - Region specific context 608 * 609 * RETURN: Status 610 * 611 * DESCRIPTION: Default region initialization 612 * 613 ******************************************************************************/ 614 615 ACPI_STATUS 616 AcpiEvDefaultRegionSetup ( 617 ACPI_HANDLE Handle, 618 UINT32 Function, 619 void *HandlerContext, 620 void **RegionContext) 621 { 622 ACPI_FUNCTION_TRACE (EvDefaultRegionSetup); 623 624 625 if (Function == ACPI_REGION_DEACTIVATE) 626 { 627 *RegionContext = NULL; 628 } 629 else 630 { 631 *RegionContext = HandlerContext; 632 } 633 634 return_ACPI_STATUS (AE_OK); 635 } 636 637 638 /******************************************************************************* 639 * 640 * FUNCTION: AcpiEvInitializeRegion 641 * 642 * PARAMETERS: RegionObj - Region we are initializing 643 * 644 * RETURN: Status 645 * 646 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them 647 * for execution at a later time 648 * 649 * Get the appropriate address space handler for a newly 650 * created region. 651 * 652 * This also performs address space specific initialization. For 653 * example, PCI regions must have an _ADR object that contains 654 * a PCI address in the scope of the definition. This address is 655 * required to perform an access to PCI config space. 656 * 657 * MUTEX: Interpreter should be unlocked, because we may run the _REG 658 * method for this region. 659 * 660 * NOTE: Possible incompliance: 661 * There is a behavior conflict in automatic _REG execution: 662 * 1. When the interpreter is evaluating a method, we can only 663 * automatically run _REG for the following case: 664 * Method(_REG, 2) {} 665 * OperationRegion (OPR1, 0x80, 0x1000010, 0x4) 666 * 2. When the interpreter is loading a table, we can also 667 * automatically run _REG for the following case: 668 * OperationRegion (OPR1, 0x80, 0x1000010, 0x4) 669 * Method(_REG, 2) {} 670 * Though this may not be compliant to the de-facto standard, the 671 * logic is kept in order not to trigger regressions. And keeping 672 * this logic should be taken care by the caller of this function. 673 * 674 ******************************************************************************/ 675 676 ACPI_STATUS 677 AcpiEvInitializeRegion ( 678 ACPI_OPERAND_OBJECT *RegionObj) 679 { 680 ACPI_OPERAND_OBJECT *HandlerObj; 681 ACPI_OPERAND_OBJECT *ObjDesc; 682 ACPI_ADR_SPACE_TYPE SpaceId; 683 ACPI_NAMESPACE_NODE *Node; 684 685 686 ACPI_FUNCTION_TRACE (EvInitializeRegion); 687 688 689 if (!RegionObj) 690 { 691 return_ACPI_STATUS (AE_BAD_PARAMETER); 692 } 693 694 if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED) 695 { 696 return_ACPI_STATUS (AE_OK); 697 } 698 699 RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED; 700 701 Node = RegionObj->Region.Node->Parent; 702 SpaceId = RegionObj->Region.SpaceId; 703 704 /* 705 * The following loop depends upon the root Node having no parent 706 * ie: AcpiGbl_RootNode->Parent being set to NULL 707 */ 708 while (Node) 709 { 710 /* Check to see if a handler exists */ 711 712 HandlerObj = NULL; 713 ObjDesc = AcpiNsGetAttachedObject (Node); 714 if (ObjDesc) 715 { 716 /* Can only be a handler if the object exists */ 717 718 switch (Node->Type) 719 { 720 case ACPI_TYPE_DEVICE: 721 case ACPI_TYPE_PROCESSOR: 722 case ACPI_TYPE_THERMAL: 723 724 HandlerObj = ObjDesc->CommonNotify.Handler; 725 break; 726 727 default: 728 729 /* Ignore other objects */ 730 731 break; 732 } 733 734 HandlerObj = AcpiEvFindRegionHandler (SpaceId, HandlerObj); 735 if (HandlerObj) 736 { 737 /* Found correct handler */ 738 739 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 740 "Found handler %p for region %p in obj %p\n", 741 HandlerObj, RegionObj, ObjDesc)); 742 743 (void) AcpiEvAttachRegion (HandlerObj, RegionObj, FALSE); 744 745 /* 746 * Tell all users that this region is usable by 747 * running the _REG method 748 */ 749 AcpiExExitInterpreter (); 750 (void) AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_CONNECT); 751 AcpiExEnterInterpreter (); 752 return_ACPI_STATUS (AE_OK); 753 } 754 } 755 756 /* This node does not have the handler we need; Pop up one level */ 757 758 Node = Node->Parent; 759 } 760 761 /* 762 * If we get here, there is no handler for this region. This is not 763 * fatal because many regions get created before a handler is installed 764 * for said region. 765 */ 766 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 767 "No handler for RegionType %s(%X) (RegionObj %p)\n", 768 AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj)); 769 770 return_ACPI_STATUS (AE_OK); 771 } 772