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 - 2023, 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 ACPI_MEM_MAPPING *Mm; 187 188 189 ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup); 190 191 192 if (Function == ACPI_REGION_DEACTIVATE) 193 { 194 if (*RegionContext) 195 { 196 LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext; 197 198 /* Delete memory mappings if present */ 199 200 while (LocalRegionContext->FirstMm) 201 { 202 Mm = LocalRegionContext->FirstMm; 203 LocalRegionContext->FirstMm = Mm->NextMm; 204 AcpiOsUnmapMemory(Mm->LogicalAddress, Mm->Length); 205 ACPI_FREE(Mm); 206 } 207 ACPI_FREE (LocalRegionContext); 208 *RegionContext = NULL; 209 } 210 return_ACPI_STATUS (AE_OK); 211 } 212 213 /* Create a new context */ 214 215 LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT)); 216 if (!(LocalRegionContext)) 217 { 218 return_ACPI_STATUS (AE_NO_MEMORY); 219 } 220 221 /* Save the region length and address for use in the handler */ 222 223 LocalRegionContext->Length = RegionDesc->Region.Length; 224 LocalRegionContext->Address = RegionDesc->Region.Address; 225 226 *RegionContext = LocalRegionContext; 227 return_ACPI_STATUS (AE_OK); 228 } 229 230 231 /******************************************************************************* 232 * 233 * FUNCTION: AcpiEvIoSpaceRegionSetup 234 * 235 * PARAMETERS: Handle - Region we are interested in 236 * Function - Start or stop 237 * HandlerContext - Address space handler context 238 * RegionContext - Region specific context 239 * 240 * RETURN: Status 241 * 242 * DESCRIPTION: Setup a IO operation region 243 * 244 ******************************************************************************/ 245 246 ACPI_STATUS 247 AcpiEvIoSpaceRegionSetup ( 248 ACPI_HANDLE Handle, 249 UINT32 Function, 250 void *HandlerContext, 251 void **RegionContext) 252 { 253 ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup); 254 255 256 if (Function == ACPI_REGION_DEACTIVATE) 257 { 258 *RegionContext = NULL; 259 } 260 else 261 { 262 *RegionContext = HandlerContext; 263 } 264 265 return_ACPI_STATUS (AE_OK); 266 } 267 268 269 /******************************************************************************* 270 * 271 * FUNCTION: AcpiEvPciConfigRegionSetup 272 * 273 * PARAMETERS: Handle - Region we are interested in 274 * Function - Start or stop 275 * HandlerContext - Address space handler context 276 * RegionContext - Region specific context 277 * 278 * RETURN: Status 279 * 280 * DESCRIPTION: Setup a PCI_Config operation region 281 * 282 * MUTEX: Assumes namespace is not locked 283 * 284 ******************************************************************************/ 285 286 ACPI_STATUS 287 AcpiEvPciConfigRegionSetup ( 288 ACPI_HANDLE Handle, 289 UINT32 Function, 290 void *HandlerContext, 291 void **RegionContext) 292 { 293 ACPI_STATUS Status = AE_OK; 294 UINT64 PciValue; 295 ACPI_PCI_ID *PciId = *RegionContext; 296 ACPI_OPERAND_OBJECT *HandlerObj; 297 ACPI_NAMESPACE_NODE *ParentNode; 298 ACPI_NAMESPACE_NODE *PciRootNode; 299 ACPI_NAMESPACE_NODE *PciDeviceNode; 300 ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle; 301 302 303 ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup); 304 305 306 HandlerObj = RegionObj->Region.Handler; 307 if (!HandlerObj) 308 { 309 /* 310 * No installed handler. This shouldn't happen because the dispatch 311 * routine checks before we get here, but we check again just in case. 312 */ 313 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 314 "Attempting to init a region %p, with no handler\n", RegionObj)); 315 return_ACPI_STATUS (AE_NOT_EXIST); 316 } 317 318 *RegionContext = NULL; 319 if (Function == ACPI_REGION_DEACTIVATE) 320 { 321 if (PciId) 322 { 323 ACPI_FREE (PciId); 324 } 325 return_ACPI_STATUS (Status); 326 } 327 328 ParentNode = RegionObj->Region.Node->Parent; 329 330 /* 331 * Get the _SEG and _BBN values from the device upon which the handler 332 * is installed. 333 * 334 * We need to get the _SEG and _BBN objects relative to the PCI BUS device. 335 * This is the device the handler has been registered to handle. 336 */ 337 338 /* 339 * If the AddressSpace.Node is still pointing to the root, we need 340 * to scan upward for a PCI Root bridge and re-associate the OpRegion 341 * handlers with that device. 342 */ 343 if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode) 344 { 345 /* Start search from the parent object */ 346 347 PciRootNode = ParentNode; 348 while (PciRootNode != AcpiGbl_RootNode) 349 { 350 /* Get the _HID/_CID in order to detect a RootBridge */ 351 352 if (AcpiEvIsPciRootBridge (PciRootNode)) 353 { 354 /* Install a handler for this PCI root bridge */ 355 356 Status = AcpiInstallAddressSpaceHandler ( 357 (ACPI_HANDLE) PciRootNode, 358 ACPI_ADR_SPACE_PCI_CONFIG, 359 ACPI_DEFAULT_HANDLER, NULL, NULL); 360 if (ACPI_FAILURE (Status)) 361 { 362 if (Status == AE_SAME_HANDLER) 363 { 364 /* 365 * It is OK if the handler is already installed on the 366 * root bridge. Still need to return a context object 367 * for the new PCI_Config operation region, however. 368 */ 369 } 370 else 371 { 372 ACPI_EXCEPTION ((AE_INFO, Status, 373 "Could not install PciConfig handler " 374 "for Root Bridge %4.4s", 375 AcpiUtGetNodeName (PciRootNode))); 376 } 377 } 378 break; 379 } 380 381 PciRootNode = PciRootNode->Parent; 382 } 383 384 /* PCI root bridge not found, use namespace root node */ 385 } 386 else 387 { 388 PciRootNode = HandlerObj->AddressSpace.Node; 389 } 390 391 /* 392 * If this region is now initialized, we are done. 393 * (InstallAddressSpaceHandler could have initialized it) 394 */ 395 if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE) 396 { 397 return_ACPI_STATUS (AE_OK); 398 } 399 400 /* Region is still not initialized. Create a new context */ 401 402 PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID)); 403 if (!PciId) 404 { 405 return_ACPI_STATUS (AE_NO_MEMORY); 406 } 407 408 /* 409 * For PCI_Config space access, we need the segment, bus, device and 410 * function numbers. Acquire them here. 411 * 412 * Find the parent device object. (This allows the operation region to be 413 * within a subscope under the device, such as a control method.) 414 */ 415 PciDeviceNode = RegionObj->Region.Node; 416 while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE)) 417 { 418 PciDeviceNode = PciDeviceNode->Parent; 419 } 420 421 if (!PciDeviceNode) 422 { 423 ACPI_FREE (PciId); 424 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 425 } 426 427 /* 428 * Get the PCI device and function numbers from the _ADR object 429 * contained in the parent's scope. 430 */ 431 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, 432 PciDeviceNode, &PciValue); 433 434 /* 435 * The default is zero, and since the allocation above zeroed the data, 436 * just do nothing on failure. 437 */ 438 if (ACPI_SUCCESS (Status)) 439 { 440 PciId->Device = ACPI_HIWORD (ACPI_LODWORD (PciValue)); 441 PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue)); 442 } 443 444 /* The PCI segment number comes from the _SEG method */ 445 446 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG, 447 PciRootNode, &PciValue); 448 if (ACPI_SUCCESS (Status)) 449 { 450 PciId->Segment = ACPI_LOWORD (PciValue); 451 } 452 453 /* The PCI bus number comes from the _BBN method */ 454 455 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN, 456 PciRootNode, &PciValue); 457 if (ACPI_SUCCESS (Status)) 458 { 459 PciId->Bus = ACPI_LOWORD (PciValue); 460 } 461 462 /* Complete/update the PCI ID for this device */ 463 464 Status = AcpiHwDerivePciId (PciId, PciRootNode, RegionObj->Region.Node); 465 if (ACPI_FAILURE (Status)) 466 { 467 ACPI_FREE (PciId); 468 return_ACPI_STATUS (Status); 469 } 470 471 *RegionContext = PciId; 472 return_ACPI_STATUS (AE_OK); 473 } 474 475 476 /******************************************************************************* 477 * 478 * FUNCTION: AcpiEvIsPciRootBridge 479 * 480 * PARAMETERS: Node - Device node being examined 481 * 482 * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge 483 * 484 * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by 485 * examining the _HID and _CID for the device. 486 * 487 ******************************************************************************/ 488 489 BOOLEAN 490 AcpiEvIsPciRootBridge ( 491 ACPI_NAMESPACE_NODE *Node) 492 { 493 ACPI_STATUS Status; 494 ACPI_PNP_DEVICE_ID *Hid; 495 ACPI_PNP_DEVICE_ID_LIST *Cid; 496 UINT32 i; 497 BOOLEAN Match; 498 499 500 /* Get the _HID and check for a PCI Root Bridge */ 501 502 Status = AcpiUtExecute_HID (Node, &Hid); 503 if (ACPI_FAILURE (Status)) 504 { 505 return (FALSE); 506 } 507 508 Match = AcpiUtIsPciRootBridge (Hid->String); 509 ACPI_FREE (Hid); 510 511 if (Match) 512 { 513 return (TRUE); 514 } 515 516 /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */ 517 518 Status = AcpiUtExecute_CID (Node, &Cid); 519 if (ACPI_FAILURE (Status)) 520 { 521 return (FALSE); 522 } 523 524 /* Check all _CIDs in the returned list */ 525 526 for (i = 0; i < Cid->Count; i++) 527 { 528 if (AcpiUtIsPciRootBridge (Cid->Ids[i].String)) 529 { 530 ACPI_FREE (Cid); 531 return (TRUE); 532 } 533 } 534 535 ACPI_FREE (Cid); 536 return (FALSE); 537 } 538 539 540 /******************************************************************************* 541 * 542 * FUNCTION: AcpiEvPciBarRegionSetup 543 * 544 * PARAMETERS: Handle - Region we are interested in 545 * Function - Start or stop 546 * HandlerContext - Address space handler context 547 * RegionContext - Region specific context 548 * 549 * RETURN: Status 550 * 551 * DESCRIPTION: Setup a PciBAR operation region 552 * 553 * MUTEX: Assumes namespace is not locked 554 * 555 ******************************************************************************/ 556 557 ACPI_STATUS 558 AcpiEvPciBarRegionSetup ( 559 ACPI_HANDLE Handle, 560 UINT32 Function, 561 void *HandlerContext, 562 void **RegionContext) 563 { 564 ACPI_FUNCTION_TRACE (EvPciBarRegionSetup); 565 566 567 return_ACPI_STATUS (AE_OK); 568 } 569 570 571 /******************************************************************************* 572 * 573 * FUNCTION: AcpiEvCmosRegionSetup 574 * 575 * PARAMETERS: Handle - Region we are interested in 576 * Function - Start or stop 577 * HandlerContext - Address space handler context 578 * RegionContext - Region specific context 579 * 580 * RETURN: Status 581 * 582 * DESCRIPTION: Setup a CMOS operation region 583 * 584 * MUTEX: Assumes namespace is not locked 585 * 586 ******************************************************************************/ 587 588 ACPI_STATUS 589 AcpiEvCmosRegionSetup ( 590 ACPI_HANDLE Handle, 591 UINT32 Function, 592 void *HandlerContext, 593 void **RegionContext) 594 { 595 ACPI_FUNCTION_TRACE (EvCmosRegionSetup); 596 597 598 return_ACPI_STATUS (AE_OK); 599 } 600 601 602 /******************************************************************************* 603 * 604 * FUNCTION: AcpiEvDataTableRegionSetup 605 * 606 * PARAMETERS: Handle - Region we are interested in 607 * Function - Start or stop 608 * HandlerContext - Address space handler context 609 * RegionContext - Region specific context 610 * 611 * RETURN: Status 612 * 613 * DESCRIPTION: Setup a DataTableRegion 614 * 615 * MUTEX: Assumes namespace is not locked 616 * 617 ******************************************************************************/ 618 619 ACPI_STATUS 620 AcpiEvDataTableRegionSetup ( 621 ACPI_HANDLE Handle, 622 UINT32 Function, 623 void *HandlerContext, 624 void **RegionContext) 625 { 626 ACPI_OPERAND_OBJECT *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle; 627 ACPI_DATA_TABLE_MAPPING *LocalRegionContext; 628 629 630 ACPI_FUNCTION_TRACE (EvDataTableRegionSetup); 631 632 633 if (Function == ACPI_REGION_DEACTIVATE) 634 { 635 if (*RegionContext) 636 { 637 ACPI_FREE (*RegionContext); 638 *RegionContext = NULL; 639 } 640 return_ACPI_STATUS (AE_OK); 641 } 642 643 /* Create a new context */ 644 645 LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DATA_TABLE_MAPPING)); 646 if (!(LocalRegionContext)) 647 { 648 return_ACPI_STATUS (AE_NO_MEMORY); 649 } 650 651 /* Save the data table pointer for use in the handler */ 652 653 LocalRegionContext->Pointer = RegionDesc->Region.Pointer; 654 655 *RegionContext = LocalRegionContext; 656 return_ACPI_STATUS (AE_OK); 657 } 658 659 660 /******************************************************************************* 661 * 662 * FUNCTION: AcpiEvDefaultRegionSetup 663 * 664 * PARAMETERS: Handle - Region we are interested in 665 * Function - Start or stop 666 * HandlerContext - Address space handler context 667 * RegionContext - Region specific context 668 * 669 * RETURN: Status 670 * 671 * DESCRIPTION: Default region initialization 672 * 673 ******************************************************************************/ 674 675 ACPI_STATUS 676 AcpiEvDefaultRegionSetup ( 677 ACPI_HANDLE Handle, 678 UINT32 Function, 679 void *HandlerContext, 680 void **RegionContext) 681 { 682 ACPI_FUNCTION_TRACE (EvDefaultRegionSetup); 683 684 685 if (Function == ACPI_REGION_DEACTIVATE) 686 { 687 *RegionContext = NULL; 688 } 689 else 690 { 691 *RegionContext = HandlerContext; 692 } 693 694 return_ACPI_STATUS (AE_OK); 695 } 696 697 698 /******************************************************************************* 699 * 700 * FUNCTION: AcpiEvInitializeRegion 701 * 702 * PARAMETERS: RegionObj - Region we are initializing 703 * 704 * RETURN: Status 705 * 706 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them 707 * for execution at a later time 708 * 709 * Get the appropriate address space handler for a newly 710 * created region. 711 * 712 * This also performs address space specific initialization. For 713 * example, PCI regions must have an _ADR object that contains 714 * a PCI address in the scope of the definition. This address is 715 * required to perform an access to PCI config space. 716 * 717 * MUTEX: Interpreter should be unlocked, because we may run the _REG 718 * method for this region. 719 * 720 * NOTE: Possible incompliance: 721 * There is a behavior conflict in automatic _REG execution: 722 * 1. When the interpreter is evaluating a method, we can only 723 * automatically run _REG for the following case: 724 * Method(_REG, 2) {} 725 * OperationRegion (OPR1, 0x80, 0x1000010, 0x4) 726 * 2. When the interpreter is loading a table, we can also 727 * automatically run _REG for the following case: 728 * OperationRegion (OPR1, 0x80, 0x1000010, 0x4) 729 * Method(_REG, 2) {} 730 * Though this may not be compliant to the de-facto standard, the 731 * logic is kept in order not to trigger regressions. And keeping 732 * this logic should be taken care by the caller of this function. 733 * 734 ******************************************************************************/ 735 736 ACPI_STATUS 737 AcpiEvInitializeRegion ( 738 ACPI_OPERAND_OBJECT *RegionObj) 739 { 740 ACPI_OPERAND_OBJECT *HandlerObj; 741 ACPI_OPERAND_OBJECT *ObjDesc; 742 ACPI_ADR_SPACE_TYPE SpaceId; 743 ACPI_NAMESPACE_NODE *Node; 744 745 746 ACPI_FUNCTION_TRACE (EvInitializeRegion); 747 748 749 if (!RegionObj) 750 { 751 return_ACPI_STATUS (AE_BAD_PARAMETER); 752 } 753 754 if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED) 755 { 756 return_ACPI_STATUS (AE_OK); 757 } 758 759 RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED; 760 761 Node = RegionObj->Region.Node->Parent; 762 SpaceId = RegionObj->Region.SpaceId; 763 764 /* 765 * The following loop depends upon the root Node having no parent 766 * ie: AcpiGbl_RootNode->Parent being set to NULL 767 */ 768 while (Node) 769 { 770 /* Check to see if a handler exists */ 771 772 HandlerObj = NULL; 773 ObjDesc = AcpiNsGetAttachedObject (Node); 774 if (ObjDesc) 775 { 776 /* Can only be a handler if the object exists */ 777 778 switch (Node->Type) 779 { 780 case ACPI_TYPE_DEVICE: 781 case ACPI_TYPE_PROCESSOR: 782 case ACPI_TYPE_THERMAL: 783 784 HandlerObj = ObjDesc->CommonNotify.Handler; 785 break; 786 787 default: 788 789 /* Ignore other objects */ 790 791 break; 792 } 793 794 HandlerObj = AcpiEvFindRegionHandler (SpaceId, HandlerObj); 795 if (HandlerObj) 796 { 797 /* Found correct handler */ 798 799 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 800 "Found handler %p for region %p in obj %p\n", 801 HandlerObj, RegionObj, ObjDesc)); 802 803 (void) AcpiEvAttachRegion (HandlerObj, RegionObj, FALSE); 804 805 /* 806 * Tell all users that this region is usable by 807 * running the _REG method 808 */ 809 AcpiExExitInterpreter (); 810 (void) AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_CONNECT); 811 AcpiExEnterInterpreter (); 812 return_ACPI_STATUS (AE_OK); 813 } 814 } 815 816 /* This node does not have the handler we need; Pop up one level */ 817 818 Node = Node->Parent; 819 } 820 821 /* 822 * If we get here, there is no handler for this region. This is not 823 * fatal because many regions get created before a handler is installed 824 * for said region. 825 */ 826 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 827 "No handler for RegionType %s(%X) (RegionObj %p)\n", 828 AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj)); 829 830 return_ACPI_STATUS (AE_OK); 831 } 832