1 /****************************************************************************** 2 * 3 * Module Name: dswload - Dispatcher namespace load callbacks 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2017, 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/compiler/aslcompiler.h> 153 #include <contrib/dev/acpica/include/amlcode.h> 154 #include <contrib/dev/acpica/include/acdispat.h> 155 #include <contrib/dev/acpica/include/acnamesp.h> 156 157 #include "aslcompiler.y.h" 158 159 #define _COMPONENT ACPI_COMPILER 160 ACPI_MODULE_NAME ("aslload") 161 162 /* Local prototypes */ 163 164 static ACPI_STATUS 165 LdLoadFieldElements ( 166 ACPI_PARSE_OBJECT *Op, 167 ACPI_WALK_STATE *WalkState); 168 169 static ACPI_STATUS 170 LdLoadResourceElements ( 171 ACPI_PARSE_OBJECT *Op, 172 ACPI_WALK_STATE *WalkState); 173 174 static ACPI_STATUS 175 LdNamespace1Begin ( 176 ACPI_PARSE_OBJECT *Op, 177 UINT32 Level, 178 void *Context); 179 180 static ACPI_STATUS 181 LdNamespace2Begin ( 182 ACPI_PARSE_OBJECT *Op, 183 UINT32 Level, 184 void *Context); 185 186 static ACPI_STATUS 187 LdCommonNamespaceEnd ( 188 ACPI_PARSE_OBJECT *Op, 189 UINT32 Level, 190 void *Context); 191 192 193 /******************************************************************************* 194 * 195 * FUNCTION: LdLoadNamespace 196 * 197 * PARAMETERS: RootOp - Root of the parse tree 198 * 199 * RETURN: Status 200 * 201 * DESCRIPTION: Perform a walk of the parse tree that in turn loads all of the 202 * named ASL/AML objects into the namespace. The namespace is 203 * constructed in order to resolve named references and references 204 * to named fields within resource templates/descriptors. 205 * 206 ******************************************************************************/ 207 208 ACPI_STATUS 209 LdLoadNamespace ( 210 ACPI_PARSE_OBJECT *RootOp) 211 { 212 ACPI_WALK_STATE *WalkState; 213 214 215 /* Create a new walk state */ 216 217 WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL); 218 if (!WalkState) 219 { 220 return (AE_NO_MEMORY); 221 } 222 223 /* Walk the entire parse tree, first pass */ 224 225 TrWalkParseTree (RootOp, ASL_WALK_VISIT_TWICE, LdNamespace1Begin, 226 LdCommonNamespaceEnd, WalkState); 227 228 /* Second pass to handle forward references */ 229 230 TrWalkParseTree (RootOp, ASL_WALK_VISIT_TWICE, LdNamespace2Begin, 231 LdCommonNamespaceEnd, WalkState); 232 233 /* Dump the namespace if debug is enabled */ 234 235 AcpiNsDumpTables (ACPI_NS_ALL, ACPI_UINT32_MAX); 236 ACPI_FREE (WalkState); 237 return (AE_OK); 238 } 239 240 241 /******************************************************************************* 242 * 243 * FUNCTION: LdLoadFieldElements 244 * 245 * PARAMETERS: Op - Parent node (Field) 246 * WalkState - Current walk state 247 * 248 * RETURN: Status 249 * 250 * DESCRIPTION: Enter the named elements of the field (children of the parent) 251 * into the namespace. 252 * 253 ******************************************************************************/ 254 255 static ACPI_STATUS 256 LdLoadFieldElements ( 257 ACPI_PARSE_OBJECT *Op, 258 ACPI_WALK_STATE *WalkState) 259 { 260 ACPI_PARSE_OBJECT *Child = NULL; 261 ACPI_NAMESPACE_NODE *Node; 262 ACPI_STATUS Status; 263 264 265 /* Get the first named field element */ 266 267 switch (Op->Asl.AmlOpcode) 268 { 269 case AML_BANK_FIELD_OP: 270 271 Child = UtGetArg (Op, 6); 272 break; 273 274 case AML_INDEX_FIELD_OP: 275 276 Child = UtGetArg (Op, 5); 277 break; 278 279 case AML_FIELD_OP: 280 281 Child = UtGetArg (Op, 4); 282 break; 283 284 default: 285 286 /* No other opcodes should arrive here */ 287 288 return (AE_BAD_PARAMETER); 289 } 290 291 /* Enter all elements into the namespace */ 292 293 while (Child) 294 { 295 switch (Child->Asl.AmlOpcode) 296 { 297 case AML_INT_RESERVEDFIELD_OP: 298 case AML_INT_ACCESSFIELD_OP: 299 case AML_INT_CONNECTION_OP: 300 break; 301 302 default: 303 304 Status = AcpiNsLookup (WalkState->ScopeInfo, 305 Child->Asl.Value.String, 306 ACPI_TYPE_LOCAL_REGION_FIELD, 307 ACPI_IMODE_LOAD_PASS1, 308 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 309 ACPI_NS_ERROR_IF_FOUND, NULL, &Node); 310 if (ACPI_FAILURE (Status)) 311 { 312 if (Status != AE_ALREADY_EXISTS) 313 { 314 AslError (ASL_ERROR, ASL_MSG_CORE_EXCEPTION, Child, 315 Child->Asl.Value.String); 316 return (Status); 317 } 318 else if (Status == AE_ALREADY_EXISTS && 319 (Node->Flags & ANOBJ_IS_EXTERNAL) && 320 Node->OwnerId != WalkState->OwnerId) 321 { 322 Node->Type = (UINT8) ACPI_TYPE_LOCAL_REGION_FIELD; 323 } 324 else 325 { 326 /* 327 * The name already exists in this scope 328 * But continue processing the elements 329 */ 330 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Child, 331 Child->Asl.Value.String); 332 } 333 } 334 else 335 { 336 Child->Asl.Node = Node; 337 Node->Op = Child; 338 } 339 break; 340 } 341 342 Child = Child->Asl.Next; 343 } 344 345 return (AE_OK); 346 } 347 348 349 /******************************************************************************* 350 * 351 * FUNCTION: LdLoadResourceElements 352 * 353 * PARAMETERS: Op - Parent node (Resource Descriptor) 354 * WalkState - Current walk state 355 * 356 * RETURN: Status 357 * 358 * DESCRIPTION: Enter the named elements of the resource descriptor (children 359 * of the parent) into the namespace. 360 * 361 * NOTE: In the real AML namespace, these named elements never exist. But 362 * we simply use the namespace here as a symbol table so we can look 363 * them up as they are referenced. 364 * 365 ******************************************************************************/ 366 367 static ACPI_STATUS 368 LdLoadResourceElements ( 369 ACPI_PARSE_OBJECT *Op, 370 ACPI_WALK_STATE *WalkState) 371 { 372 ACPI_PARSE_OBJECT *InitializerOp = NULL; 373 ACPI_NAMESPACE_NODE *Node; 374 ACPI_STATUS Status; 375 376 377 /* 378 * Enter the resource name into the namespace. Name must not already exist. 379 * This opens a scope, so later field names are guaranteed to be new/unique. 380 */ 381 Status = AcpiNsLookup (WalkState->ScopeInfo, Op->Asl.Namepath, 382 ACPI_TYPE_LOCAL_RESOURCE, ACPI_IMODE_LOAD_PASS1, 383 ACPI_NS_NO_UPSEARCH | ACPI_NS_ERROR_IF_FOUND, 384 WalkState, &Node); 385 if (ACPI_FAILURE (Status)) 386 { 387 if (Status == AE_ALREADY_EXISTS) 388 { 389 /* Actual node causing the error was saved in ParentMethod */ 390 391 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, 392 (ACPI_PARSE_OBJECT *) Op->Asl.ParentMethod, Op->Asl.Namepath); 393 return (AE_OK); 394 } 395 return (Status); 396 } 397 398 Node->Value = (UINT32) Op->Asl.Value.Integer; 399 Node->Op = Op; 400 Op->Asl.Node = Node; 401 402 /* 403 * Now enter the predefined fields, for easy lookup when referenced 404 * by the source ASL 405 */ 406 InitializerOp = ASL_GET_CHILD_NODE (Op); 407 while (InitializerOp) 408 { 409 if (InitializerOp->Asl.ExternalName) 410 { 411 Status = AcpiNsLookup (WalkState->ScopeInfo, 412 InitializerOp->Asl.ExternalName, 413 ACPI_TYPE_LOCAL_RESOURCE_FIELD, 414 ACPI_IMODE_LOAD_PASS1, 415 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE, 416 NULL, &Node); 417 if (ACPI_FAILURE (Status)) 418 { 419 return (Status); 420 } 421 422 /* 423 * Store the field offset and length in the namespace node 424 * so it can be used when the field is referenced 425 */ 426 Node->Value = InitializerOp->Asl.Value.Tag.BitOffset; 427 Node->Length = InitializerOp->Asl.Value.Tag.BitLength; 428 InitializerOp->Asl.Node = Node; 429 Node->Op = InitializerOp; 430 } 431 432 InitializerOp = ASL_GET_PEER_NODE (InitializerOp); 433 } 434 435 return (AE_OK); 436 } 437 438 439 /******************************************************************************* 440 * 441 * FUNCTION: LdNamespace1Begin 442 * 443 * PARAMETERS: ASL_WALK_CALLBACK 444 * 445 * RETURN: Status 446 * 447 * DESCRIPTION: Descending callback used during the parse tree walk. If this 448 * is a named AML opcode, enter into the namespace 449 * 450 ******************************************************************************/ 451 452 static ACPI_STATUS 453 LdNamespace1Begin ( 454 ACPI_PARSE_OBJECT *Op, 455 UINT32 Level, 456 void *Context) 457 { 458 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; 459 ACPI_NAMESPACE_NODE *Node; 460 ACPI_PARSE_OBJECT *MethodOp; 461 ACPI_STATUS Status; 462 ACPI_OBJECT_TYPE ObjectType; 463 ACPI_OBJECT_TYPE ActualObjectType = ACPI_TYPE_ANY; 464 char *Path; 465 UINT32 Flags = ACPI_NS_NO_UPSEARCH; 466 ACPI_PARSE_OBJECT *Arg; 467 UINT32 i; 468 BOOLEAN ForceNewScope = FALSE; 469 ACPI_OWNER_ID OwnerId = 0; 470 471 472 ACPI_FUNCTION_NAME (LdNamespace1Begin); 473 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n", 474 Op, Op->Asl.ParseOpName)); 475 476 if (Op->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK) 477 { 478 /* 479 * Allocate an OwnerId for this block. This helps identify the owners 480 * of each namespace node. This is used in determining whether if 481 * certain external declarations cause redefinition errors. 482 */ 483 Status = AcpiUtAllocateOwnerId (&OwnerId); 484 WalkState->OwnerId = OwnerId; 485 if (ACPI_FAILURE (Status)) 486 { 487 AslCoreSubsystemError (Op, Status, 488 "Failure to allocate owner ID to this definition block.", FALSE); 489 return_ACPI_STATUS (Status); 490 } 491 } 492 493 /* 494 * We are only interested in opcodes that have an associated name 495 * (or multiple names) 496 */ 497 switch (Op->Asl.AmlOpcode) 498 { 499 case AML_BANK_FIELD_OP: 500 case AML_INDEX_FIELD_OP: 501 case AML_FIELD_OP: 502 503 Status = LdLoadFieldElements (Op, WalkState); 504 return (Status); 505 506 case AML_INT_CONNECTION_OP: 507 508 509 if (Op->Asl.Child->Asl.AmlOpcode != AML_INT_NAMEPATH_OP) 510 { 511 break; 512 } 513 Arg = Op->Asl.Child; 514 515 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Asl.ExternalName, 516 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, 517 WalkState, &Node); 518 if (ACPI_FAILURE (Status)) 519 { 520 break; 521 } 522 523 if (Node->Type == ACPI_TYPE_BUFFER) 524 { 525 Arg->Asl.Node = Node; 526 527 Arg = Node->Op->Asl.Child; /* Get namepath */ 528 Arg = Arg->Asl.Next; /* Get actual buffer */ 529 Arg = Arg->Asl.Child; /* Buffer length */ 530 Arg = Arg->Asl.Next; /* RAW_DATA buffer */ 531 } 532 break; 533 534 default: 535 536 /* All other opcodes go below */ 537 538 break; 539 } 540 541 /* Check if this object has already been installed in the namespace */ 542 543 if (Op->Asl.Node) 544 { 545 return (AE_OK); 546 } 547 548 Path = Op->Asl.Namepath; 549 if (!Path) 550 { 551 return (AE_OK); 552 } 553 554 /* Map the raw opcode into an internal object type */ 555 556 switch (Op->Asl.ParseOpcode) 557 { 558 case PARSEOP_NAME: 559 560 Arg = Op->Asl.Child; /* Get the NameSeg/NameString node */ 561 Arg = Arg->Asl.Next; /* First peer is the object to be associated with the name */ 562 563 /* 564 * If this name refers to a ResourceTemplate, we will need to open 565 * a new scope so that the resource subfield names can be entered into 566 * the namespace underneath this name 567 */ 568 if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC) 569 { 570 ForceNewScope = TRUE; 571 } 572 573 /* Get the data type associated with the named object, not the name itself */ 574 575 /* Log2 loop to convert from Btype (binary) to Etype (encoded) */ 576 577 ObjectType = 1; 578 for (i = 1; i < Arg->Asl.AcpiBtype; i *= 2) 579 { 580 ObjectType++; 581 } 582 break; 583 584 585 case PARSEOP_EXTERNAL: 586 /* 587 * "External" simply enters a name and type into the namespace. 588 * We must be careful to not open a new scope, however, no matter 589 * what type the external name refers to (e.g., a method) 590 * 591 * first child is name, next child is ObjectType 592 */ 593 ActualObjectType = (UINT8) Op->Asl.Child->Asl.Next->Asl.Value.Integer; 594 ObjectType = ACPI_TYPE_ANY; 595 596 /* 597 * We will mark every new node along the path as "External". This 598 * allows some or all of the nodes to be created later in the ASL 599 * code. Handles cases like this: 600 * 601 * External (\_SB_.PCI0.ABCD, IntObj) 602 * Scope (_SB_) 603 * { 604 * Device (PCI0) 605 * { 606 * } 607 * } 608 * Method (X) 609 * { 610 * Store (\_SB_.PCI0.ABCD, Local0) 611 * } 612 */ 613 Flags |= ACPI_NS_EXTERNAL; 614 break; 615 616 case PARSEOP_DEFAULT_ARG: 617 618 if (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC) 619 { 620 Status = LdLoadResourceElements (Op, WalkState); 621 return_ACPI_STATUS (Status); 622 } 623 624 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); 625 break; 626 627 case PARSEOP_SCOPE: 628 /* 629 * The name referenced by Scope(Name) must already exist at this point. 630 * In other words, forward references for Scope() are not supported. 631 * The only real reason for this is that the MS interpreter cannot 632 * handle this case. Perhaps someday this case can go away. 633 */ 634 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY, 635 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, 636 WalkState, &(Node)); 637 if (ACPI_FAILURE (Status)) 638 { 639 if (Status == AE_NOT_FOUND) 640 { 641 /* The name was not found, go ahead and create it */ 642 643 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, 644 ACPI_TYPE_LOCAL_SCOPE, 645 ACPI_IMODE_LOAD_PASS1, Flags, 646 WalkState, &(Node)); 647 if (ACPI_FAILURE (Status)) 648 { 649 return_ACPI_STATUS (Status); 650 } 651 652 /* 653 * However, this is an error -- primarily because the MS 654 * interpreter can't handle a forward reference from the 655 * Scope() operator. 656 */ 657 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op, 658 Op->Asl.ExternalName); 659 AslError (ASL_ERROR, ASL_MSG_SCOPE_FWD_REF, Op, 660 Op->Asl.ExternalName); 661 goto FinishNode; 662 } 663 664 AslCoreSubsystemError (Op, Status, 665 "Failure from namespace lookup", FALSE); 666 667 return_ACPI_STATUS (Status); 668 } 669 else /* Status AE_OK */ 670 { 671 /* 672 * Do not allow references to external scopes from the DSDT. 673 * This is because the DSDT is always loaded first, and the 674 * external reference cannot be resolved -- causing a runtime 675 * error because Scope() must be resolved immediately. 676 * 10/2015. 677 */ 678 if ((Node->Flags & ANOBJ_IS_EXTERNAL) && 679 (ACPI_COMPARE_NAME (Gbl_TableSignature, "DSDT"))) 680 { 681 /* However, allowed if the reference is within a method */ 682 683 MethodOp = Op->Asl.Parent; 684 while (MethodOp && 685 (MethodOp->Asl.ParseOpcode != PARSEOP_METHOD)) 686 { 687 MethodOp = MethodOp->Asl.Parent; 688 } 689 690 if (!MethodOp) 691 { 692 /* Not in a control method, error */ 693 694 AslError (ASL_ERROR, ASL_MSG_CROSS_TABLE_SCOPE, Op, NULL); 695 } 696 } 697 } 698 699 /* We found a node with this name, now check the type */ 700 701 switch (Node->Type) 702 { 703 case ACPI_TYPE_LOCAL_SCOPE: 704 case ACPI_TYPE_DEVICE: 705 case ACPI_TYPE_POWER: 706 case ACPI_TYPE_PROCESSOR: 707 case ACPI_TYPE_THERMAL: 708 709 /* These are acceptable types - they all open a new scope */ 710 break; 711 712 case ACPI_TYPE_INTEGER: 713 case ACPI_TYPE_STRING: 714 case ACPI_TYPE_BUFFER: 715 /* 716 * These types we will allow, but we will change the type. 717 * This enables some existing code of the form: 718 * 719 * Name (DEB, 0) 720 * Scope (DEB) { ... } 721 * 722 * Which is used to workaround the fact that the MS interpreter 723 * does not allow Scope() forward references. 724 */ 725 sprintf (MsgBuffer, "%s [%s], changing type to [Scope]", 726 Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type)); 727 AslError (ASL_REMARK, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer); 728 729 /* Switch the type to scope, open the new scope */ 730 731 Node->Type = ACPI_TYPE_LOCAL_SCOPE; 732 Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE, 733 WalkState); 734 if (ACPI_FAILURE (Status)) 735 { 736 return_ACPI_STATUS (Status); 737 } 738 break; 739 740 default: 741 742 /* All other types are an error */ 743 744 sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName, 745 AcpiUtGetTypeName (Node->Type)); 746 AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer); 747 748 /* 749 * However, switch the type to be an actual scope so 750 * that compilation can continue without generating a whole 751 * cascade of additional errors. Open the new scope. 752 */ 753 Node->Type = ACPI_TYPE_LOCAL_SCOPE; 754 Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE, 755 WalkState); 756 if (ACPI_FAILURE (Status)) 757 { 758 return_ACPI_STATUS (Status); 759 } 760 break; 761 } 762 763 Status = AE_OK; 764 goto FinishNode; 765 766 767 default: 768 769 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); 770 break; 771 } 772 773 774 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Loading name: %s, (%s)\n", 775 Op->Asl.ExternalName, AcpiUtGetTypeName (ObjectType))); 776 777 /* The name must not already exist */ 778 779 Flags |= ACPI_NS_ERROR_IF_FOUND; 780 781 /* 782 * Enter the named type into the internal namespace. We enter the name 783 * as we go downward in the parse tree. Any necessary subobjects that 784 * involve arguments to the opcode must be created as we go back up the 785 * parse tree later. 786 */ 787 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType, 788 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node); 789 if (ACPI_FAILURE (Status)) 790 { 791 if (Status == AE_ALREADY_EXISTS) 792 { 793 /* The name already exists in this scope */ 794 795 if (Node->Type == ACPI_TYPE_LOCAL_SCOPE) 796 { 797 /* Allow multiple references to the same scope */ 798 799 Node->Type = (UINT8) ObjectType; 800 Status = AE_OK; 801 } 802 else if ((Node->Flags & ANOBJ_IS_EXTERNAL) && 803 (Op->Asl.ParseOpcode != PARSEOP_EXTERNAL)) 804 { 805 /* 806 * Allow one create on an object or segment that was 807 * previously declared External only if WalkState->OwnerId and 808 * Node->OwnerId are found in different tables (meaning that 809 * they have differnt OwnerIds). 810 */ 811 Node->Flags &= ~ANOBJ_IS_EXTERNAL; 812 Node->Type = (UINT8) ObjectType; 813 814 /* Just retyped a node, probably will need to open a scope */ 815 816 if (AcpiNsOpensScope (ObjectType)) 817 { 818 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState); 819 if (ACPI_FAILURE (Status)) 820 { 821 return_ACPI_STATUS (Status); 822 } 823 } 824 825 Status = AE_OK; 826 827 if (Node->OwnerId == WalkState->OwnerId && 828 !(Node->Flags & IMPLICIT_EXTERNAL)) 829 { 830 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op, 831 Op->Asl.ExternalName); 832 } 833 if (Node->Flags & IMPLICIT_EXTERNAL) 834 { 835 Node->Flags &= ~IMPLICIT_EXTERNAL; 836 } 837 } 838 else if (!(Node->Flags & ANOBJ_IS_EXTERNAL) && 839 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL)) 840 { 841 /* 842 * Allow externals in same scope as the definition of the 843 * actual object. Similar to C. Allows multiple definition 844 * blocks that refer to each other in the same file. However, 845 * do not allow name declaration and an external declaration 846 * within the same table. This is considered a re-declaration. 847 */ 848 Status = AE_OK; 849 850 if (Node->OwnerId == WalkState->OwnerId) 851 { 852 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op, 853 Op->Asl.ExternalName); 854 } 855 } 856 else if ((Node->Flags & ANOBJ_IS_EXTERNAL) && 857 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL) && 858 (ObjectType == ACPI_TYPE_ANY)) 859 { 860 /* 861 * Allow update of externals of unknown type. 862 * In the case that multiple definition blocks are being 863 * parsed, updating the OwnerId allows enables subsequent calls 864 * of this method to understand which table the most recent 865 * external declaration was seen. Without this OwnerId update, 866 * code like the following is allowed to compile: 867 * 868 * DefinitionBlock("externtest.aml", "DSDT", 0x02, "Intel", "Many", 0x00000001) 869 * { 870 * External(ERRS,methodobj) 871 * Method (MAIN) 872 * { 873 * Name(NUM2, 0) 874 * ERRS(1,2,3) 875 * } 876 * } 877 * 878 * DefinitionBlock("externtest.aml", "SSDT", 0x02, "Intel", "Many", 0x00000001) 879 * { 880 * if (0) 881 * { 882 * External(ERRS,methodobj) 883 * } 884 * Method (ERRS,3) 885 * {} 886 * 887 * } 888 */ 889 Node->OwnerId = WalkState->OwnerId; 890 891 if (AcpiNsOpensScope (ActualObjectType)) 892 { 893 Node->Type = (UINT8) ActualObjectType; 894 Status = AE_OK; 895 } 896 else 897 { 898 sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName, 899 AcpiUtGetTypeName (Node->Type)); 900 AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer); 901 return_ACPI_STATUS (AE_OK); 902 } 903 } 904 else 905 { 906 /* Valid error, object already exists */ 907 908 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op, 909 Op->Asl.ExternalName); 910 return_ACPI_STATUS (AE_OK); 911 } 912 } 913 else 914 { 915 AslCoreSubsystemError (Op, Status, 916 "Failure from namespace lookup", FALSE); 917 return_ACPI_STATUS (Status); 918 } 919 } 920 921 if (ForceNewScope) 922 { 923 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState); 924 if (ACPI_FAILURE (Status)) 925 { 926 return_ACPI_STATUS (Status); 927 } 928 } 929 930 FinishNode: 931 /* 932 * Point the parse node to the new namespace node, and point 933 * the Node back to the original Parse node 934 */ 935 Op->Asl.Node = Node; 936 Node->Op = Op; 937 938 /* Set the actual data type if appropriate (EXTERNAL term only) */ 939 940 if (ActualObjectType != ACPI_TYPE_ANY) 941 { 942 Node->Type = (UINT8) ActualObjectType; 943 Node->Value = ASL_EXTERNAL_METHOD; 944 } 945 946 if (Op->Asl.ParseOpcode == PARSEOP_METHOD) 947 { 948 /* 949 * Get the method argument count from "Extra" and save 950 * it in the namespace node 951 */ 952 Node->Value = (UINT32) Op->Asl.Extra; 953 } 954 955 return_ACPI_STATUS (Status); 956 } 957 958 959 /******************************************************************************* 960 * 961 * FUNCTION: LdNamespace2Begin 962 * 963 * PARAMETERS: ASL_WALK_CALLBACK 964 * 965 * RETURN: Status 966 * 967 * DESCRIPTION: Descending callback used during the pass 2 parse tree walk. 968 * Second pass resolves some forward references. 969 * 970 * Notes: 971 * Currently only needs to handle the Alias operator. 972 * Could be used to allow forward references from the Scope() operator, but 973 * the MS interpreter does not allow this, so this compiler does not either. 974 * 975 ******************************************************************************/ 976 977 static ACPI_STATUS 978 LdNamespace2Begin ( 979 ACPI_PARSE_OBJECT *Op, 980 UINT32 Level, 981 void *Context) 982 { 983 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; 984 ACPI_STATUS Status; 985 ACPI_NAMESPACE_NODE *Node; 986 ACPI_OBJECT_TYPE ObjectType; 987 BOOLEAN ForceNewScope = FALSE; 988 ACPI_PARSE_OBJECT *Arg; 989 char *Path; 990 ACPI_NAMESPACE_NODE *TargetNode; 991 992 993 ACPI_FUNCTION_NAME (LdNamespace2Begin); 994 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n", 995 Op, Op->Asl.ParseOpName)); 996 997 998 /* Ignore Ops with no namespace node */ 999 1000 Node = Op->Asl.Node; 1001 if (!Node) 1002 { 1003 return (AE_OK); 1004 } 1005 1006 /* Get the type to determine if we should push the scope */ 1007 1008 if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) && 1009 (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC)) 1010 { 1011 ObjectType = ACPI_TYPE_LOCAL_RESOURCE; 1012 } 1013 else 1014 { 1015 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); 1016 } 1017 1018 /* Push scope for Resource Templates */ 1019 1020 if (Op->Asl.ParseOpcode == PARSEOP_NAME) 1021 { 1022 if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC) 1023 { 1024 ForceNewScope = TRUE; 1025 } 1026 } 1027 1028 /* Push the scope stack */ 1029 1030 if (ForceNewScope || AcpiNsOpensScope (ObjectType)) 1031 { 1032 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState); 1033 if (ACPI_FAILURE (Status)) 1034 { 1035 return_ACPI_STATUS (Status); 1036 } 1037 } 1038 1039 if (Op->Asl.ParseOpcode == PARSEOP_ALIAS) 1040 { 1041 /* Complete the alias node by getting and saving the target node */ 1042 1043 /* First child is the alias target */ 1044 1045 Arg = Op->Asl.Child; 1046 1047 /* Get the target pathname */ 1048 1049 Path = Arg->Asl.Namepath; 1050 if (!Path) 1051 { 1052 Status = UtInternalizeName (Arg->Asl.ExternalName, &Path); 1053 if (ACPI_FAILURE (Status)) 1054 { 1055 return (Status); 1056 } 1057 } 1058 1059 /* Get the NS node associated with the target. It must exist. */ 1060 1061 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY, 1062 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, 1063 WalkState, &TargetNode); 1064 if (ACPI_FAILURE (Status)) 1065 { 1066 if (Status == AE_NOT_FOUND) 1067 { 1068 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op, 1069 Op->Asl.ExternalName); 1070 1071 /* 1072 * The name was not found, go ahead and create it. 1073 * This prevents more errors later. 1074 */ 1075 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, 1076 ACPI_TYPE_ANY, 1077 ACPI_IMODE_LOAD_PASS1, ACPI_NS_NO_UPSEARCH, 1078 WalkState, &(Node)); 1079 return (AE_OK); 1080 } 1081 1082 AslCoreSubsystemError (Op, Status, 1083 "Failure from namespace lookup", FALSE); 1084 return (AE_OK); 1085 } 1086 1087 /* Save the target node within the alias node */ 1088 1089 Node->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode); 1090 } 1091 1092 return (AE_OK); 1093 } 1094 1095 1096 /******************************************************************************* 1097 * 1098 * FUNCTION: LdCommonNamespaceEnd 1099 * 1100 * PARAMETERS: ASL_WALK_CALLBACK 1101 * 1102 * RETURN: Status 1103 * 1104 * DESCRIPTION: Ascending callback used during the loading of the namespace, 1105 * We only need to worry about managing the scope stack here. 1106 * 1107 ******************************************************************************/ 1108 1109 static ACPI_STATUS 1110 LdCommonNamespaceEnd ( 1111 ACPI_PARSE_OBJECT *Op, 1112 UINT32 Level, 1113 void *Context) 1114 { 1115 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; 1116 ACPI_OBJECT_TYPE ObjectType; 1117 BOOLEAN ForceNewScope = FALSE; 1118 1119 1120 ACPI_FUNCTION_NAME (LdCommonNamespaceEnd); 1121 1122 1123 /* We are only interested in opcodes that have an associated name */ 1124 1125 if (!Op->Asl.Namepath) 1126 { 1127 return (AE_OK); 1128 } 1129 1130 /* Get the type to determine if we should pop the scope */ 1131 1132 if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) && 1133 (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC)) 1134 { 1135 /* TBD: Merge into AcpiDsMapNamedOpcodeToDataType */ 1136 1137 ObjectType = ACPI_TYPE_LOCAL_RESOURCE; 1138 } 1139 else 1140 { 1141 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); 1142 } 1143 1144 /* Pop scope that was pushed for Resource Templates */ 1145 1146 if (Op->Asl.ParseOpcode == PARSEOP_NAME) 1147 { 1148 if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC) 1149 { 1150 ForceNewScope = TRUE; 1151 } 1152 } 1153 1154 /* Pop the scope stack */ 1155 1156 if (ForceNewScope || AcpiNsOpensScope (ObjectType)) 1157 { 1158 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 1159 "(%s): Popping scope for Op [%s] %p\n", 1160 AcpiUtGetTypeName (ObjectType), Op->Asl.ParseOpName, Op)); 1161 1162 (void) AcpiDsScopeStackPop (WalkState); 1163 } 1164 1165 return (AE_OK); 1166 } 1167