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 - 2013, 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 * These types open a new scope, so we need the NS node in order to access 191 * any children. 192 */ 193 case ACPI_TYPE_DEVICE: 194 case ACPI_TYPE_POWER: 195 case ACPI_TYPE_PROCESSOR: 196 case ACPI_TYPE_THERMAL: 197 case ACPI_TYPE_LOCAL_SCOPE: 198 /* 199 * The new alias has the type ALIAS and points to the original 200 * NS node, not the object itself. 201 */ 202 AliasNode->Type = ACPI_TYPE_LOCAL_ALIAS; 203 AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode); 204 break; 205 206 case ACPI_TYPE_METHOD: 207 /* 208 * Control method aliases need to be differentiated 209 */ 210 AliasNode->Type = ACPI_TYPE_LOCAL_METHOD_ALIAS; 211 AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode); 212 break; 213 214 default: 215 216 /* Attach the original source object to the new Alias Node */ 217 218 /* 219 * The new alias assumes the type of the target, and it points 220 * to the same object. The reference count of the object has an 221 * additional reference to prevent deletion out from under either the 222 * target node or the alias Node 223 */ 224 Status = AcpiNsAttachObject (AliasNode, 225 AcpiNsGetAttachedObject (TargetNode), TargetNode->Type); 226 break; 227 } 228 229 /* Since both operands are Nodes, we don't need to delete them */ 230 231 return_ACPI_STATUS (Status); 232 } 233 234 235 /******************************************************************************* 236 * 237 * FUNCTION: AcpiExCreateEvent 238 * 239 * PARAMETERS: WalkState - Current state 240 * 241 * RETURN: Status 242 * 243 * DESCRIPTION: Create a new event object 244 * 245 ******************************************************************************/ 246 247 ACPI_STATUS 248 AcpiExCreateEvent ( 249 ACPI_WALK_STATE *WalkState) 250 { 251 ACPI_STATUS Status; 252 ACPI_OPERAND_OBJECT *ObjDesc; 253 254 255 ACPI_FUNCTION_TRACE (ExCreateEvent); 256 257 258 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_EVENT); 259 if (!ObjDesc) 260 { 261 Status = AE_NO_MEMORY; 262 goto Cleanup; 263 } 264 265 /* 266 * Create the actual OS semaphore, with zero initial units -- meaning 267 * that the event is created in an unsignalled state 268 */ 269 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, 270 &ObjDesc->Event.OsSemaphore); 271 if (ACPI_FAILURE (Status)) 272 { 273 goto Cleanup; 274 } 275 276 /* Attach object to the Node */ 277 278 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) WalkState->Operands[0], 279 ObjDesc, ACPI_TYPE_EVENT); 280 281 Cleanup: 282 /* 283 * Remove local reference to the object (on error, will cause deletion 284 * of both object and semaphore if present.) 285 */ 286 AcpiUtRemoveReference (ObjDesc); 287 return_ACPI_STATUS (Status); 288 } 289 290 291 /******************************************************************************* 292 * 293 * FUNCTION: AcpiExCreateMutex 294 * 295 * PARAMETERS: WalkState - Current state 296 * 297 * RETURN: Status 298 * 299 * DESCRIPTION: Create a new mutex object 300 * 301 * Mutex (Name[0], SyncLevel[1]) 302 * 303 ******************************************************************************/ 304 305 ACPI_STATUS 306 AcpiExCreateMutex ( 307 ACPI_WALK_STATE *WalkState) 308 { 309 ACPI_STATUS Status = AE_OK; 310 ACPI_OPERAND_OBJECT *ObjDesc; 311 312 313 ACPI_FUNCTION_TRACE_PTR (ExCreateMutex, ACPI_WALK_OPERANDS); 314 315 316 /* Create the new mutex object */ 317 318 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX); 319 if (!ObjDesc) 320 { 321 Status = AE_NO_MEMORY; 322 goto Cleanup; 323 } 324 325 /* Create the actual OS Mutex */ 326 327 Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex); 328 if (ACPI_FAILURE (Status)) 329 { 330 goto Cleanup; 331 } 332 333 /* Init object and attach to NS node */ 334 335 ObjDesc->Mutex.SyncLevel = (UINT8) WalkState->Operands[1]->Integer.Value; 336 ObjDesc->Mutex.Node = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0]; 337 338 Status = AcpiNsAttachObject (ObjDesc->Mutex.Node, ObjDesc, ACPI_TYPE_MUTEX); 339 340 341 Cleanup: 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 * SpaceId - Address space ID for the region 358 * WalkState - Current state 359 * 360 * RETURN: Status 361 * 362 * DESCRIPTION: Create a new operation region object 363 * 364 ******************************************************************************/ 365 366 ACPI_STATUS 367 AcpiExCreateRegion ( 368 UINT8 *AmlStart, 369 UINT32 AmlLength, 370 UINT8 SpaceId, 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 (!AcpiIsValidSpaceId (SpaceId)) 400 { 401 /* 402 * Print an error message, but continue. We don't want to abort 403 * a table load for this exception. Instead, if the region is 404 * actually used at runtime, abort the executing method. 405 */ 406 ACPI_ERROR ((AE_INFO, "Invalid/unknown Address Space ID: 0x%2.2X", SpaceId)); 407 } 408 409 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n", 410 AcpiUtGetRegionName (SpaceId), SpaceId)); 411 412 /* Create the region descriptor */ 413 414 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION); 415 if (!ObjDesc) 416 { 417 Status = AE_NO_MEMORY; 418 goto Cleanup; 419 } 420 421 /* 422 * Remember location in AML stream of address & length 423 * operands since they need to be evaluated at run time. 424 */ 425 RegionObj2 = ObjDesc->Common.NextObject; 426 RegionObj2->Extra.AmlStart = AmlStart; 427 RegionObj2->Extra.AmlLength = AmlLength; 428 if (WalkState->ScopeInfo) 429 { 430 RegionObj2->Extra.ScopeNode = WalkState->ScopeInfo->Scope.Node; 431 } 432 else 433 { 434 RegionObj2->Extra.ScopeNode = Node; 435 } 436 437 /* Init the region from the operands */ 438 439 ObjDesc->Region.SpaceId = SpaceId; 440 ObjDesc->Region.Address = 0; 441 ObjDesc->Region.Length = 0; 442 ObjDesc->Region.Node = Node; 443 444 /* Install the new region object in the parent Node */ 445 446 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION); 447 448 449 Cleanup: 450 451 /* Remove local reference to the object */ 452 453 AcpiUtRemoveReference (ObjDesc); 454 return_ACPI_STATUS (Status); 455 } 456 457 458 /******************************************************************************* 459 * 460 * FUNCTION: AcpiExCreateProcessor 461 * 462 * PARAMETERS: WalkState - Current state 463 * 464 * RETURN: Status 465 * 466 * DESCRIPTION: Create a new processor object and populate the fields 467 * 468 * Processor (Name[0], CpuID[1], PblockAddr[2], PblockLength[3]) 469 * 470 ******************************************************************************/ 471 472 ACPI_STATUS 473 AcpiExCreateProcessor ( 474 ACPI_WALK_STATE *WalkState) 475 { 476 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 477 ACPI_OPERAND_OBJECT *ObjDesc; 478 ACPI_STATUS Status; 479 480 481 ACPI_FUNCTION_TRACE_PTR (ExCreateProcessor, WalkState); 482 483 484 /* Create the processor object */ 485 486 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PROCESSOR); 487 if (!ObjDesc) 488 { 489 return_ACPI_STATUS (AE_NO_MEMORY); 490 } 491 492 /* Initialize the processor object from the operands */ 493 494 ObjDesc->Processor.ProcId = (UINT8) Operand[1]->Integer.Value; 495 ObjDesc->Processor.Length = (UINT8) Operand[3]->Integer.Value; 496 ObjDesc->Processor.Address = (ACPI_IO_ADDRESS) Operand[2]->Integer.Value; 497 498 /* Install the processor object in the parent Node */ 499 500 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], 501 ObjDesc, ACPI_TYPE_PROCESSOR); 502 503 /* Remove local reference to the object */ 504 505 AcpiUtRemoveReference (ObjDesc); 506 return_ACPI_STATUS (Status); 507 } 508 509 510 /******************************************************************************* 511 * 512 * FUNCTION: AcpiExCreatePowerResource 513 * 514 * PARAMETERS: WalkState - Current state 515 * 516 * RETURN: Status 517 * 518 * DESCRIPTION: Create a new PowerResource object and populate the fields 519 * 520 * PowerResource (Name[0], SystemLevel[1], ResourceOrder[2]) 521 * 522 ******************************************************************************/ 523 524 ACPI_STATUS 525 AcpiExCreatePowerResource ( 526 ACPI_WALK_STATE *WalkState) 527 { 528 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 529 ACPI_STATUS Status; 530 ACPI_OPERAND_OBJECT *ObjDesc; 531 532 533 ACPI_FUNCTION_TRACE_PTR (ExCreatePowerResource, WalkState); 534 535 536 /* Create the power resource object */ 537 538 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_POWER); 539 if (!ObjDesc) 540 { 541 return_ACPI_STATUS (AE_NO_MEMORY); 542 } 543 544 /* Initialize the power object from the operands */ 545 546 ObjDesc->PowerResource.SystemLevel = (UINT8) Operand[1]->Integer.Value; 547 ObjDesc->PowerResource.ResourceOrder = (UINT16) Operand[2]->Integer.Value; 548 549 /* Install the power resource object in the parent Node */ 550 551 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], 552 ObjDesc, ACPI_TYPE_POWER); 553 554 /* Remove local reference to the object */ 555 556 AcpiUtRemoveReference (ObjDesc); 557 return_ACPI_STATUS (Status); 558 } 559 #endif 560 561 562 /******************************************************************************* 563 * 564 * FUNCTION: AcpiExCreateMethod 565 * 566 * PARAMETERS: AmlStart - First byte of the method's AML 567 * AmlLength - AML byte count for this method 568 * WalkState - Current state 569 * 570 * RETURN: Status 571 * 572 * DESCRIPTION: Create a new method object 573 * 574 ******************************************************************************/ 575 576 ACPI_STATUS 577 AcpiExCreateMethod ( 578 UINT8 *AmlStart, 579 UINT32 AmlLength, 580 ACPI_WALK_STATE *WalkState) 581 { 582 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 583 ACPI_OPERAND_OBJECT *ObjDesc; 584 ACPI_STATUS Status; 585 UINT8 MethodFlags; 586 587 588 ACPI_FUNCTION_TRACE_PTR (ExCreateMethod, WalkState); 589 590 591 /* Create a new method object */ 592 593 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); 594 if (!ObjDesc) 595 { 596 Status = AE_NO_MEMORY; 597 goto Exit; 598 } 599 600 /* Save the method's AML pointer and length */ 601 602 ObjDesc->Method.AmlStart = AmlStart; 603 ObjDesc->Method.AmlLength = AmlLength; 604 605 /* 606 * Disassemble the method flags. Split off the ArgCount, Serialized 607 * flag, and SyncLevel for efficiency. 608 */ 609 MethodFlags = (UINT8) Operand[1]->Integer.Value; 610 ObjDesc->Method.ParamCount = (UINT8) (MethodFlags & AML_METHOD_ARG_COUNT); 611 612 /* 613 * Get the SyncLevel. If method is serialized, a mutex will be 614 * created for this method when it is parsed. 615 */ 616 if (MethodFlags & AML_METHOD_SERIALIZED) 617 { 618 ObjDesc->Method.InfoFlags = ACPI_METHOD_SERIALIZED; 619 620 /* 621 * ACPI 1.0: SyncLevel = 0 622 * ACPI 2.0: SyncLevel = SyncLevel in method declaration 623 */ 624 ObjDesc->Method.SyncLevel = (UINT8) 625 ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4); 626 } 627 628 /* Attach the new object to the method Node */ 629 630 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0], 631 ObjDesc, ACPI_TYPE_METHOD); 632 633 /* Remove local reference to the object */ 634 635 AcpiUtRemoveReference (ObjDesc); 636 637 Exit: 638 /* Remove a reference to the operand */ 639 640 AcpiUtRemoveReference (Operand[1]); 641 return_ACPI_STATUS (Status); 642 } 643