1 /****************************************************************************** 2 * 3 * Module Name: excreate - Named object creation 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2012, 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 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117 #define __EXCREATE_C__ 118 119 #include "acpi.h" 120 #include "accommon.h" 121 #include "acinterp.h" 122 #include "amlcode.h" 123 #include "acnamesp.h" 124 125 126 #define _COMPONENT ACPI_EXECUTER 127 ACPI_MODULE_NAME ("excreate") 128 129 130 #ifndef ACPI_NO_METHOD_EXECUTION 131 /******************************************************************************* 132 * 133 * FUNCTION: AcpiExCreateAlias 134 * 135 * PARAMETERS: WalkState - Current state, contains operands 136 * 137 * RETURN: Status 138 * 139 * DESCRIPTION: Create a new named alias 140 * 141 ******************************************************************************/ 142 143 ACPI_STATUS 144 AcpiExCreateAlias ( 145 ACPI_WALK_STATE *WalkState) 146 { 147 ACPI_NAMESPACE_NODE *TargetNode; 148 ACPI_NAMESPACE_NODE *AliasNode; 149 ACPI_STATUS Status = AE_OK; 150 151 152 ACPI_FUNCTION_TRACE (ExCreateAlias); 153 154 155 /* Get the source/alias operands (both namespace nodes) */ 156 157 AliasNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0]; 158 TargetNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[1]; 159 160 if ((TargetNode->Type == ACPI_TYPE_LOCAL_ALIAS) || 161 (TargetNode->Type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) 162 { 163 /* 164 * Dereference an existing alias so that we don't create a chain 165 * of aliases. With this code, we guarantee that an alias is 166 * always exactly one level of indirection away from the 167 * actual aliased name. 168 */ 169 TargetNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, TargetNode->Object); 170 } 171 172 /* 173 * For objects that can never change (i.e., the NS node will 174 * permanently point to the same object), we can simply attach 175 * the object to the new NS node. For other objects (such as 176 * Integers, buffers, etc.), we have to point the Alias node 177 * to the original Node. 178 */ 179 switch (TargetNode->Type) 180 { 181 182 /* For these types, the sub-object can change dynamically via a Store */ 183 184 case ACPI_TYPE_INTEGER: 185 case ACPI_TYPE_STRING: 186 case ACPI_TYPE_BUFFER: 187 case ACPI_TYPE_PACKAGE: 188 case ACPI_TYPE_BUFFER_FIELD: 189 190 /* 191 * These types open a new scope, so we need the NS node in order to access 192 * any children. 193 */ 194 case ACPI_TYPE_DEVICE: 195 case ACPI_TYPE_POWER: 196 case ACPI_TYPE_PROCESSOR: 197 case ACPI_TYPE_THERMAL: 198 case ACPI_TYPE_LOCAL_SCOPE: 199 200 /* 201 * The new alias has the type ALIAS and points to the original 202 * NS node, not the object itself. 203 */ 204 AliasNode->Type = ACPI_TYPE_LOCAL_ALIAS; 205 AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode); 206 break; 207 208 case ACPI_TYPE_METHOD: 209 210 /* 211 * Control method aliases need to be differentiated 212 */ 213 AliasNode->Type = ACPI_TYPE_LOCAL_METHOD_ALIAS; 214 AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode); 215 break; 216 217 default: 218 219 /* Attach the original source object to the new Alias Node */ 220 221 /* 222 * The new alias assumes the type of the target, and it points 223 * to the same object. The reference count of the object has an 224 * additional reference to prevent deletion out from under either the 225 * target node or the alias Node 226 */ 227 Status = AcpiNsAttachObject (AliasNode, 228 AcpiNsGetAttachedObject (TargetNode), TargetNode->Type); 229 break; 230 } 231 232 /* Since both operands are Nodes, we don't need to delete them */ 233 234 return_ACPI_STATUS (Status); 235 } 236 237 238 /******************************************************************************* 239 * 240 * FUNCTION: AcpiExCreateEvent 241 * 242 * PARAMETERS: WalkState - Current state 243 * 244 * RETURN: Status 245 * 246 * DESCRIPTION: Create a new event object 247 * 248 ******************************************************************************/ 249 250 ACPI_STATUS 251 AcpiExCreateEvent ( 252 ACPI_WALK_STATE *WalkState) 253 { 254 ACPI_STATUS Status; 255 ACPI_OPERAND_OBJECT *ObjDesc; 256 257 258 ACPI_FUNCTION_TRACE (ExCreateEvent); 259 260 261 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_EVENT); 262 if (!ObjDesc) 263 { 264 Status = AE_NO_MEMORY; 265 goto Cleanup; 266 } 267 268 /* 269 * Create the actual OS semaphore, with zero initial units -- meaning 270 * that the event is created in an unsignalled state 271 */ 272 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, 273 &ObjDesc->Event.OsSemaphore); 274 if (ACPI_FAILURE (Status)) 275 { 276 goto Cleanup; 277 } 278 279 /* Attach object to the Node */ 280 281 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) WalkState->Operands[0], 282 ObjDesc, ACPI_TYPE_EVENT); 283 284 Cleanup: 285 /* 286 * Remove local reference to the object (on error, will cause deletion 287 * of both object and semaphore if present.) 288 */ 289 AcpiUtRemoveReference (ObjDesc); 290 return_ACPI_STATUS (Status); 291 } 292 293 294 /******************************************************************************* 295 * 296 * FUNCTION: AcpiExCreateMutex 297 * 298 * PARAMETERS: WalkState - Current state 299 * 300 * RETURN: Status 301 * 302 * DESCRIPTION: Create a new mutex object 303 * 304 * Mutex (Name[0], SyncLevel[1]) 305 * 306 ******************************************************************************/ 307 308 ACPI_STATUS 309 AcpiExCreateMutex ( 310 ACPI_WALK_STATE *WalkState) 311 { 312 ACPI_STATUS Status = AE_OK; 313 ACPI_OPERAND_OBJECT *ObjDesc; 314 315 316 ACPI_FUNCTION_TRACE_PTR (ExCreateMutex, ACPI_WALK_OPERANDS); 317 318 319 /* Create the new mutex object */ 320 321 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX); 322 if (!ObjDesc) 323 { 324 Status = AE_NO_MEMORY; 325 goto Cleanup; 326 } 327 328 /* Create the actual OS Mutex */ 329 330 Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex); 331 if (ACPI_FAILURE (Status)) 332 { 333 goto Cleanup; 334 } 335 336 /* Init object and attach to NS node */ 337 338 ObjDesc->Mutex.SyncLevel = (UINT8) WalkState->Operands[1]->Integer.Value; 339 ObjDesc->Mutex.Node = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0]; 340 341 Status = AcpiNsAttachObject (ObjDesc->Mutex.Node, ObjDesc, ACPI_TYPE_MUTEX); 342 343 344 Cleanup: 345 /* 346 * Remove local reference to the object (on error, will cause deletion 347 * of both object and semaphore if present.) 348 */ 349 AcpiUtRemoveReference (ObjDesc); 350 return_ACPI_STATUS (Status); 351 } 352 353 354 /******************************************************************************* 355 * 356 * FUNCTION: AcpiExCreateRegion 357 * 358 * PARAMETERS: AmlStart - Pointer to the region declaration AML 359 * AmlLength - Max length of the declaration AML 360 * SpaceId - Address space ID for the region 361 * WalkState - Current state 362 * 363 * RETURN: Status 364 * 365 * DESCRIPTION: Create a new operation region object 366 * 367 ******************************************************************************/ 368 369 ACPI_STATUS 370 AcpiExCreateRegion ( 371 UINT8 *AmlStart, 372 UINT32 AmlLength, 373 UINT8 SpaceId, 374 ACPI_WALK_STATE *WalkState) 375 { 376 ACPI_STATUS Status; 377 ACPI_OPERAND_OBJECT *ObjDesc; 378 ACPI_NAMESPACE_NODE *Node; 379 ACPI_OPERAND_OBJECT *RegionObj2; 380 381 382 ACPI_FUNCTION_TRACE (ExCreateRegion); 383 384 385 /* Get the Namespace Node */ 386 387 Node = WalkState->Op->Common.Node; 388 389 /* 390 * If the region object is already attached to this node, 391 * just return 392 */ 393 if (AcpiNsGetAttachedObject (Node)) 394 { 395 return_ACPI_STATUS (AE_OK); 396 } 397 398 /* 399 * Space ID must be one of the predefined IDs, or in the user-defined 400 * range 401 */ 402 if (!AcpiIsValidSpaceId (SpaceId)) 403 { 404 /* 405 * Print an error message, but continue. We don't want to abort 406 * a table load for this exception. Instead, if the region is 407 * actually used at runtime, abort the executing method. 408 */ 409 ACPI_ERROR ((AE_INFO, "Invalid/unknown Address Space ID: 0x%2.2X", SpaceId)); 410 } 411 412 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n", 413 AcpiUtGetRegionName (SpaceId), SpaceId)); 414 415 /* Create the region descriptor */ 416 417 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION); 418 if (!ObjDesc) 419 { 420 Status = AE_NO_MEMORY; 421 goto Cleanup; 422 } 423 424 /* 425 * Remember location in AML stream of address & length 426 * operands since they need to be evaluated at run time. 427 */ 428 RegionObj2 = ObjDesc->Common.NextObject; 429 RegionObj2->Extra.AmlStart = AmlStart; 430 RegionObj2->Extra.AmlLength = AmlLength; 431 if (WalkState->ScopeInfo) 432 { 433 RegionObj2->Extra.ScopeNode = WalkState->ScopeInfo->Scope.Node; 434 } 435 else 436 { 437 RegionObj2->Extra.ScopeNode = Node; 438 } 439 440 /* Init the region from the operands */ 441 442 ObjDesc->Region.SpaceId = SpaceId; 443 ObjDesc->Region.Address = 0; 444 ObjDesc->Region.Length = 0; 445 ObjDesc->Region.Node = Node; 446 447 /* Install the new region object in the parent Node */ 448 449 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION); 450 451 452 Cleanup: 453 454 /* Remove local reference to the object */ 455 456 AcpiUtRemoveReference (ObjDesc); 457 return_ACPI_STATUS (Status); 458 } 459 460 461 /******************************************************************************* 462 * 463 * FUNCTION: AcpiExCreateProcessor 464 * 465 * PARAMETERS: WalkState - Current state 466 * 467 * RETURN: Status 468 * 469 * DESCRIPTION: Create a new processor object and populate the fields 470 * 471 * Processor (Name[0], CpuID[1], PblockAddr[2], PblockLength[3]) 472 * 473 ******************************************************************************/ 474 475 ACPI_STATUS 476 AcpiExCreateProcessor ( 477 ACPI_WALK_STATE *WalkState) 478 { 479 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 480 ACPI_OPERAND_OBJECT *ObjDesc; 481 ACPI_STATUS Status; 482 483 484 ACPI_FUNCTION_TRACE_PTR (ExCreateProcessor, WalkState); 485 486 487 /* Create the processor object */ 488 489 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PROCESSOR); 490 if (!ObjDesc) 491 { 492 return_ACPI_STATUS (AE_NO_MEMORY); 493 } 494 495 /* Initialize the processor object from the operands */ 496 497 ObjDesc->Processor.ProcId = (UINT8) Operand[1]->Integer.Value; 498 ObjDesc->Processor.Length = (UINT8) Operand[3]->Integer.Value; 499 ObjDesc->Processor.Address = (ACPI_IO_ADDRESS) Operand[2]->Integer.Value; 500 501 /* Install the processor object in the parent Node */ 502 503 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], 504 ObjDesc, ACPI_TYPE_PROCESSOR); 505 506 /* Remove local reference to the object */ 507 508 AcpiUtRemoveReference (ObjDesc); 509 return_ACPI_STATUS (Status); 510 } 511 512 513 /******************************************************************************* 514 * 515 * FUNCTION: AcpiExCreatePowerResource 516 * 517 * PARAMETERS: WalkState - Current state 518 * 519 * RETURN: Status 520 * 521 * DESCRIPTION: Create a new PowerResource object and populate the fields 522 * 523 * PowerResource (Name[0], SystemLevel[1], ResourceOrder[2]) 524 * 525 ******************************************************************************/ 526 527 ACPI_STATUS 528 AcpiExCreatePowerResource ( 529 ACPI_WALK_STATE *WalkState) 530 { 531 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 532 ACPI_STATUS Status; 533 ACPI_OPERAND_OBJECT *ObjDesc; 534 535 536 ACPI_FUNCTION_TRACE_PTR (ExCreatePowerResource, WalkState); 537 538 539 /* Create the power resource object */ 540 541 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_POWER); 542 if (!ObjDesc) 543 { 544 return_ACPI_STATUS (AE_NO_MEMORY); 545 } 546 547 /* Initialize the power object from the operands */ 548 549 ObjDesc->PowerResource.SystemLevel = (UINT8) Operand[1]->Integer.Value; 550 ObjDesc->PowerResource.ResourceOrder = (UINT16) Operand[2]->Integer.Value; 551 552 /* Install the power resource object in the parent Node */ 553 554 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], 555 ObjDesc, ACPI_TYPE_POWER); 556 557 /* Remove local reference to the object */ 558 559 AcpiUtRemoveReference (ObjDesc); 560 return_ACPI_STATUS (Status); 561 } 562 #endif 563 564 565 /******************************************************************************* 566 * 567 * FUNCTION: AcpiExCreateMethod 568 * 569 * PARAMETERS: AmlStart - First byte of the method's AML 570 * AmlLength - AML byte count for this method 571 * WalkState - Current state 572 * 573 * RETURN: Status 574 * 575 * DESCRIPTION: Create a new method object 576 * 577 ******************************************************************************/ 578 579 ACPI_STATUS 580 AcpiExCreateMethod ( 581 UINT8 *AmlStart, 582 UINT32 AmlLength, 583 ACPI_WALK_STATE *WalkState) 584 { 585 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 586 ACPI_OPERAND_OBJECT *ObjDesc; 587 ACPI_STATUS Status; 588 UINT8 MethodFlags; 589 590 591 ACPI_FUNCTION_TRACE_PTR (ExCreateMethod, WalkState); 592 593 594 /* Create a new method object */ 595 596 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); 597 if (!ObjDesc) 598 { 599 Status = AE_NO_MEMORY; 600 goto Exit; 601 } 602 603 /* Save the method's AML pointer and length */ 604 605 ObjDesc->Method.AmlStart = AmlStart; 606 ObjDesc->Method.AmlLength = AmlLength; 607 608 /* 609 * Disassemble the method flags. Split off the ArgCount, Serialized 610 * flag, and SyncLevel for efficiency. 611 */ 612 MethodFlags = (UINT8) Operand[1]->Integer.Value; 613 ObjDesc->Method.ParamCount = (UINT8) (MethodFlags & AML_METHOD_ARG_COUNT); 614 615 /* 616 * Get the SyncLevel. If method is serialized, a mutex will be 617 * created for this method when it is parsed. 618 */ 619 if (MethodFlags & AML_METHOD_SERIALIZED) 620 { 621 ObjDesc->Method.InfoFlags = ACPI_METHOD_SERIALIZED; 622 623 /* 624 * ACPI 1.0: SyncLevel = 0 625 * ACPI 2.0: SyncLevel = SyncLevel in method declaration 626 */ 627 ObjDesc->Method.SyncLevel = (UINT8) 628 ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4); 629 } 630 631 /* Attach the new object to the method Node */ 632 633 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], 634 ObjDesc, ACPI_TYPE_METHOD); 635 636 /* Remove local reference to the object */ 637 638 AcpiUtRemoveReference (ObjDesc); 639 640 Exit: 641 /* Remove a reference to the operand */ 642 643 AcpiUtRemoveReference (Operand[1]); 644 return_ACPI_STATUS (Status); 645 } 646