excreate.c revision 128212
1/****************************************************************************** 2 * 3 * Module Name: excreate - Named object creation 4 * $Revision: 103 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2004, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#define __EXCREATE_C__ 119 120#include "acpi.h" 121#include "acinterp.h" 122#include "amlcode.h" 123#include "acnamesp.h" 124#include "acevents.h" 125#include "actables.h" 126 127 128#define _COMPONENT ACPI_EXECUTER 129 ACPI_MODULE_NAME ("excreate") 130 131 132#ifndef ACPI_NO_METHOD_EXECUTION 133/***************************************************************************** 134 * 135 * FUNCTION: AcpiExCreateAlias 136 * 137 * PARAMETERS: WalkState - Current state, contains operands 138 * 139 * RETURN: Status 140 * 141 * DESCRIPTION: Create a new named alias 142 * 143 ****************************************************************************/ 144 145ACPI_STATUS 146AcpiExCreateAlias ( 147 ACPI_WALK_STATE *WalkState) 148{ 149 ACPI_NAMESPACE_NODE *TargetNode; 150 ACPI_NAMESPACE_NODE *AliasNode; 151 ACPI_STATUS Status = AE_OK; 152 153 154 ACPI_FUNCTION_TRACE ("ExCreateAlias"); 155 156 157 /* Get the source/alias operands (both namespace nodes) */ 158 159 AliasNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0]; 160 TargetNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[1]; 161 162 if ((TargetNode->Type == ACPI_TYPE_LOCAL_ALIAS) || 163 (TargetNode->Type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) 164 { 165 /* 166 * Dereference an existing alias so that we don't create a chain 167 * of aliases. With this code, we guarantee that an alias is 168 * always exactly one level of indirection away from the 169 * actual aliased name. 170 */ 171 TargetNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, TargetNode->Object); 172 } 173 174 /* 175 * For objects that can never change (i.e., the NS node will 176 * permanently point to the same object), we can simply attach 177 * the object to the new NS node. For other objects (such as 178 * Integers, buffers, etc.), we have to point the Alias node 179 * to the original Node. 180 */ 181 switch (TargetNode->Type) 182 { 183 case ACPI_TYPE_INTEGER: 184 case ACPI_TYPE_STRING: 185 case ACPI_TYPE_BUFFER: 186 case ACPI_TYPE_PACKAGE: 187 case ACPI_TYPE_BUFFER_FIELD: 188 189 /* 190 * The new alias has the type ALIAS and points to the original 191 * NS node, not the object itself. This is because for these 192 * types, the object can change dynamically via a Store. 193 */ 194 AliasNode->Type = ACPI_TYPE_LOCAL_ALIAS; 195 AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode); 196 break; 197 198 case ACPI_TYPE_METHOD: 199 200 /* 201 * The new alias has the type ALIAS and points to the original 202 * NS node, not the object itself. This is because for these 203 * types, the object can change dynamically via a Store. 204 */ 205 AliasNode->Type = ACPI_TYPE_LOCAL_METHOD_ALIAS; 206 AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode); 207 break; 208 209 default: 210 211 /* Attach the original source object to the new Alias Node */ 212 213 /* 214 * The new alias assumes the type of the target, and it points 215 * to the same object. The reference count of the object has an 216 * additional reference to prevent deletion out from under either the 217 * target node or the alias Node 218 */ 219 Status = AcpiNsAttachObject (AliasNode, 220 AcpiNsGetAttachedObject (TargetNode), 221 TargetNode->Type); 222 break; 223 } 224 225 /* Since both operands are Nodes, we don't need to delete them */ 226 227 return_ACPI_STATUS (Status); 228} 229 230 231/***************************************************************************** 232 * 233 * FUNCTION: AcpiExCreateEvent 234 * 235 * PARAMETERS: WalkState - Current state 236 * 237 * RETURN: Status 238 * 239 * DESCRIPTION: Create a new event object 240 * 241 ****************************************************************************/ 242 243ACPI_STATUS 244AcpiExCreateEvent ( 245 ACPI_WALK_STATE *WalkState) 246{ 247 ACPI_STATUS Status; 248 ACPI_OPERAND_OBJECT *ObjDesc; 249 250 251 ACPI_FUNCTION_TRACE ("ExCreateEvent"); 252 253 254 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_EVENT); 255 if (!ObjDesc) 256 { 257 Status = AE_NO_MEMORY; 258 goto Cleanup; 259 } 260 261 /* 262 * Create the actual OS semaphore, with zero initial units -- meaning 263 * that the event is created in an unsignalled state 264 */ 265 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, 266 &ObjDesc->Event.Semaphore); 267 if (ACPI_FAILURE (Status)) 268 { 269 goto Cleanup; 270 } 271 272 /* Attach object to the Node */ 273 274 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) WalkState->Operands[0], 275 ObjDesc, ACPI_TYPE_EVENT); 276 277Cleanup: 278 /* 279 * Remove local reference to the object (on error, will cause deletion 280 * of both object and semaphore if present.) 281 */ 282 AcpiUtRemoveReference (ObjDesc); 283 return_ACPI_STATUS (Status); 284} 285 286 287/***************************************************************************** 288 * 289 * FUNCTION: AcpiExCreateMutex 290 * 291 * PARAMETERS: WalkState - Current state 292 * 293 * RETURN: Status 294 * 295 * DESCRIPTION: Create a new mutex object 296 * 297 * Mutex (Name[0], SyncLevel[1]) 298 * 299 ****************************************************************************/ 300 301ACPI_STATUS 302AcpiExCreateMutex ( 303 ACPI_WALK_STATE *WalkState) 304{ 305 ACPI_STATUS Status = AE_OK; 306 ACPI_OPERAND_OBJECT *ObjDesc; 307 308 309 ACPI_FUNCTION_TRACE_PTR ("ExCreateMutex", ACPI_WALK_OPERANDS); 310 311 312 /* Create the new mutex object */ 313 314 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX); 315 if (!ObjDesc) 316 { 317 Status = AE_NO_MEMORY; 318 goto Cleanup; 319 } 320 321 /* 322 * Create the actual OS semaphore. 323 * One unit max to make it a mutex, with one initial unit to allow 324 * the mutex to be acquired. 325 */ 326 Status = AcpiOsCreateSemaphore (1, 1, &ObjDesc->Mutex.Semaphore); 327 if (ACPI_FAILURE (Status)) 328 { 329 goto Cleanup; 330 } 331 332 /* Init object and attach to NS node */ 333 334 ObjDesc->Mutex.SyncLevel = (UINT8) WalkState->Operands[1]->Integer.Value; 335 ObjDesc->Mutex.Node = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0]; 336 337 Status = AcpiNsAttachObject (ObjDesc->Mutex.Node, 338 ObjDesc, ACPI_TYPE_MUTEX); 339 340 341Cleanup: 342 /* 343 * Remove local reference to the object (on error, will cause deletion 344 * of both object and semaphore if present.) 345 */ 346 AcpiUtRemoveReference (ObjDesc); 347 return_ACPI_STATUS (Status); 348} 349 350 351/***************************************************************************** 352 * 353 * FUNCTION: AcpiExCreateRegion 354 * 355 * PARAMETERS: AmlStart - Pointer to the region declaration AML 356 * AmlLength - Max length of the declaration AML 357 * Operands - List of operands for the opcode 358 * WalkState - Current state 359 * 360 * RETURN: Status 361 * 362 * DESCRIPTION: Create a new operation region object 363 * 364 ****************************************************************************/ 365 366ACPI_STATUS 367AcpiExCreateRegion ( 368 UINT8 *AmlStart, 369 UINT32 AmlLength, 370 UINT8 RegionSpace, 371 ACPI_WALK_STATE *WalkState) 372{ 373 ACPI_STATUS Status; 374 ACPI_OPERAND_OBJECT *ObjDesc; 375 ACPI_NAMESPACE_NODE *Node; 376 ACPI_OPERAND_OBJECT *RegionObj2; 377 378 379 ACPI_FUNCTION_TRACE ("ExCreateRegion"); 380 381 382 /* Get the Namespace Node */ 383 384 Node = WalkState->Op->Common.Node; 385 386 /* 387 * If the region object is already attached to this node, 388 * just return 389 */ 390 if (AcpiNsGetAttachedObject (Node)) 391 { 392 return_ACPI_STATUS (AE_OK); 393 } 394 395 /* 396 * Space ID must be one of the predefined IDs, or in the user-defined 397 * range 398 */ 399 if ((RegionSpace >= ACPI_NUM_PREDEFINED_REGIONS) && 400 (RegionSpace < ACPI_USER_REGION_BEGIN)) 401 { 402 ACPI_REPORT_ERROR (("Invalid AddressSpace type %X\n", RegionSpace)); 403 return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID); 404 } 405 406 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (%X)\n", 407 AcpiUtGetRegionName (RegionSpace), RegionSpace)); 408 409 /* Create the region descriptor */ 410 411 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION); 412 if (!ObjDesc) 413 { 414 Status = AE_NO_MEMORY; 415 goto Cleanup; 416 } 417 418 /* 419 * Remember location in AML stream of address & length 420 * operands since they need to be evaluated at run time. 421 */ 422 RegionObj2 = ObjDesc->Common.NextObject; 423 RegionObj2->Extra.AmlStart = AmlStart; 424 RegionObj2->Extra.AmlLength = AmlLength; 425 426 /* Init the region from the operands */ 427 428 ObjDesc->Region.SpaceId = RegionSpace; 429 ObjDesc->Region.Address = 0; 430 ObjDesc->Region.Length = 0; 431 ObjDesc->Region.Node = Node; 432 433 /* Install the new region object in the parent Node */ 434 435 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION); 436 437 438Cleanup: 439 440 /* Remove local reference to the object */ 441 442 AcpiUtRemoveReference (ObjDesc); 443 return_ACPI_STATUS (Status); 444} 445 446 447/***************************************************************************** 448 * 449 * FUNCTION: AcpiExCreateTableRegion 450 * 451 * PARAMETERS: WalkState - Current state 452 * 453 * RETURN: Status 454 * 455 * DESCRIPTION: Create a new DataTableRegion object 456 * 457 ****************************************************************************/ 458 459ACPI_STATUS 460AcpiExCreateTableRegion ( 461 ACPI_WALK_STATE *WalkState) 462{ 463 ACPI_STATUS Status; 464 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 465 ACPI_OPERAND_OBJECT *ObjDesc; 466 ACPI_NAMESPACE_NODE *Node; 467 ACPI_TABLE_HEADER *Table; 468 ACPI_OPERAND_OBJECT *RegionObj2; 469 470 471 ACPI_FUNCTION_TRACE ("ExCreateTableRegion"); 472 473 474 /* Get the Node from the object stack */ 475 476 Node = WalkState->Op->Common.Node; 477 478 /* 479 * If the region object is already attached to this node, 480 * just return 481 */ 482 if (AcpiNsGetAttachedObject (Node)) 483 { 484 return_ACPI_STATUS (AE_OK); 485 } 486 487 /* Find the ACPI table */ 488 489 Status = AcpiTbFindTable (Operand[1]->String.Pointer, 490 Operand[2]->String.Pointer, 491 Operand[3]->String.Pointer, &Table); 492 if (ACPI_FAILURE (Status)) 493 { 494 return_ACPI_STATUS (Status); 495 } 496 497 /* Create the region descriptor */ 498 499 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION); 500 if (!ObjDesc) 501 { 502 return_ACPI_STATUS (AE_NO_MEMORY); 503 } 504 505 RegionObj2 = ObjDesc->Common.NextObject; 506 RegionObj2->Extra.RegionContext = NULL; 507 508 /* Init the region from the operands */ 509 510 ObjDesc->Region.SpaceId = REGION_DATA_TABLE; 511 ObjDesc->Region.Address = (ACPI_PHYSICAL_ADDRESS) ACPI_TO_INTEGER (Table); 512 ObjDesc->Region.Length = Table->Length; 513 ObjDesc->Region.Node = Node; 514 ObjDesc->Region.Flags = AOPOBJ_DATA_VALID; 515 516 /* Install the new region object in the parent Node */ 517 518 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION); 519 if (ACPI_FAILURE (Status)) 520 { 521 goto Cleanup; 522 } 523 524 Status = AcpiEvInitializeRegion (ObjDesc, FALSE); 525 if (ACPI_FAILURE (Status)) 526 { 527 if (Status == AE_NOT_EXIST) 528 { 529 Status = AE_OK; 530 } 531 else 532 { 533 goto Cleanup; 534 } 535 } 536 537 ObjDesc->Region.Flags |= AOPOBJ_SETUP_COMPLETE; 538 539 540Cleanup: 541 542 /* Remove local reference to the object */ 543 544 AcpiUtRemoveReference (ObjDesc); 545 return_ACPI_STATUS (Status); 546} 547 548 549/***************************************************************************** 550 * 551 * FUNCTION: AcpiExCreateProcessor 552 * 553 * PARAMETERS: WalkState - Current state 554 * 555 * RETURN: Status 556 * 557 * DESCRIPTION: Create a new processor object and populate the fields 558 * 559 * Processor (Name[0], CpuID[1], PblockAddr[2], PblockLength[3]) 560 * 561 ****************************************************************************/ 562 563ACPI_STATUS 564AcpiExCreateProcessor ( 565 ACPI_WALK_STATE *WalkState) 566{ 567 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 568 ACPI_OPERAND_OBJECT *ObjDesc; 569 ACPI_STATUS Status; 570 571 572 ACPI_FUNCTION_TRACE_PTR ("ExCreateProcessor", WalkState); 573 574 575 /* Create the processor object */ 576 577 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PROCESSOR); 578 if (!ObjDesc) 579 { 580 return_ACPI_STATUS (AE_NO_MEMORY); 581 } 582 583 /* 584 * Initialize the processor object from the operands 585 */ 586 ObjDesc->Processor.ProcId = (UINT8) Operand[1]->Integer.Value; 587 ObjDesc->Processor.Address = (ACPI_IO_ADDRESS) Operand[2]->Integer.Value; 588 ObjDesc->Processor.Length = (UINT8) Operand[3]->Integer.Value; 589 590 /* Install the processor object in the parent Node */ 591 592 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], 593 ObjDesc, ACPI_TYPE_PROCESSOR); 594 595 /* Remove local reference to the object */ 596 597 AcpiUtRemoveReference (ObjDesc); 598 return_ACPI_STATUS (Status); 599} 600 601 602/***************************************************************************** 603 * 604 * FUNCTION: AcpiExCreatePowerResource 605 * 606 * PARAMETERS: WalkState - Current state 607 * 608 * RETURN: Status 609 * 610 * DESCRIPTION: Create a new PowerResource object and populate the fields 611 * 612 * PowerResource (Name[0], SystemLevel[1], ResourceOrder[2]) 613 * 614 ****************************************************************************/ 615 616ACPI_STATUS 617AcpiExCreatePowerResource ( 618 ACPI_WALK_STATE *WalkState) 619{ 620 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 621 ACPI_STATUS Status; 622 ACPI_OPERAND_OBJECT *ObjDesc; 623 624 625 ACPI_FUNCTION_TRACE_PTR ("ExCreatePowerResource", WalkState); 626 627 628 /* Create the power resource object */ 629 630 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_POWER); 631 if (!ObjDesc) 632 { 633 return_ACPI_STATUS (AE_NO_MEMORY); 634 } 635 636 /* Initialize the power object from the operands */ 637 638 ObjDesc->PowerResource.SystemLevel = (UINT8) Operand[1]->Integer.Value; 639 ObjDesc->PowerResource.ResourceOrder = (UINT16) Operand[2]->Integer.Value; 640 641 /* Install the power resource object in the parent Node */ 642 643 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], 644 ObjDesc, ACPI_TYPE_POWER); 645 646 /* Remove local reference to the object */ 647 648 AcpiUtRemoveReference (ObjDesc); 649 return_ACPI_STATUS (Status); 650} 651 652#endif 653 654/***************************************************************************** 655 * 656 * FUNCTION: AcpiExCreateMethod 657 * 658 * PARAMETERS: AmlStart - First byte of the method's AML 659 * AmlLength - AML byte count for this method 660 * WalkState - Current state 661 * 662 * RETURN: Status 663 * 664 * DESCRIPTION: Create a new method object 665 * 666 ****************************************************************************/ 667 668ACPI_STATUS 669AcpiExCreateMethod ( 670 UINT8 *AmlStart, 671 UINT32 AmlLength, 672 ACPI_WALK_STATE *WalkState) 673{ 674 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 675 ACPI_OPERAND_OBJECT *ObjDesc; 676 ACPI_STATUS Status; 677 UINT8 MethodFlags; 678 679 680 ACPI_FUNCTION_TRACE_PTR ("ExCreateMethod", WalkState); 681 682 683 /* Create a new method object */ 684 685 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); 686 if (!ObjDesc) 687 { 688 return_ACPI_STATUS (AE_NO_MEMORY); 689 } 690 691 /* Save the method's AML pointer and length */ 692 693 ObjDesc->Method.AmlStart = AmlStart; 694 ObjDesc->Method.AmlLength = AmlLength; 695 696 /* 697 * Disassemble the method flags. Split off the Arg Count 698 * for efficiency 699 */ 700 MethodFlags = (UINT8) Operand[1]->Integer.Value; 701 702 ObjDesc->Method.MethodFlags = (UINT8) (MethodFlags & ~AML_METHOD_ARG_COUNT); 703 ObjDesc->Method.ParamCount = (UINT8) (MethodFlags & AML_METHOD_ARG_COUNT); 704 705 /* 706 * Get the concurrency count. If required, a semaphore will be 707 * created for this method when it is parsed. 708 */ 709 if (AcpiGbl_AllMethodsSerialized) 710 { 711 ObjDesc->Method.Concurrency = 1; 712 ObjDesc->Method.MethodFlags |= AML_METHOD_SERIALIZED; 713 } 714 else if (MethodFlags & AML_METHOD_SERIALIZED) 715 { 716 /* 717 * ACPI 1.0: Concurrency = 1 718 * ACPI 2.0: Concurrency = (SyncLevel (in method declaration) + 1) 719 */ 720 ObjDesc->Method.Concurrency = (UINT8) 721 (((MethodFlags & AML_METHOD_SYNCH_LEVEL) >> 4) + 1); 722 } 723 else 724 { 725 ObjDesc->Method.Concurrency = ACPI_INFINITE_CONCURRENCY; 726 } 727 728 /* Attach the new object to the method Node */ 729 730 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], 731 ObjDesc, ACPI_TYPE_METHOD); 732 733 /* Remove local reference to the object */ 734 735 AcpiUtRemoveReference (ObjDesc); 736 737 /* Remove a reference to the operand */ 738 739 AcpiUtRemoveReference (Operand[1]); 740 return_ACPI_STATUS (Status); 741} 742 743 744