1 /****************************************************************************** 2 * 3 * Module Name: dsfield - Dispatcher field routines 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, 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 "acpi.h" 153 #include "accommon.h" 154 #include "amlcode.h" 155 #include "acdispat.h" 156 #include "acinterp.h" 157 #include "acnamesp.h" 158 #include "acparser.h" 159 160 161 #define _COMPONENT ACPI_DISPATCHER 162 ACPI_MODULE_NAME ("dsfield") 163 164 /* Local prototypes */ 165 166 #ifdef ACPI_ASL_COMPILER 167 #include "acdisasm.h" 168 169 static ACPI_STATUS 170 AcpiDsCreateExternalRegion ( 171 ACPI_STATUS LookupStatus, 172 ACPI_PARSE_OBJECT *Op, 173 char *Path, 174 ACPI_WALK_STATE *WalkState, 175 ACPI_NAMESPACE_NODE **Node); 176 #endif 177 178 static ACPI_STATUS 179 AcpiDsGetFieldNames ( 180 ACPI_CREATE_FIELD_INFO *Info, 181 ACPI_WALK_STATE *WalkState, 182 ACPI_PARSE_OBJECT *Arg); 183 184 185 #ifdef ACPI_ASL_COMPILER 186 /******************************************************************************* 187 * 188 * FUNCTION: AcpiDsCreateExternalRegion (iASL Disassembler only) 189 * 190 * PARAMETERS: LookupStatus - Status from NsLookup operation 191 * Op - Op containing the Field definition and args 192 * Path - Pathname of the region 193 * ` WalkState - Current method state 194 * Node - Where the new region node is returned 195 * 196 * RETURN: Status 197 * 198 * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new 199 * region node/object. 200 * 201 ******************************************************************************/ 202 203 static ACPI_STATUS 204 AcpiDsCreateExternalRegion ( 205 ACPI_STATUS LookupStatus, 206 ACPI_PARSE_OBJECT *Op, 207 char *Path, 208 ACPI_WALK_STATE *WalkState, 209 ACPI_NAMESPACE_NODE **Node) 210 { 211 ACPI_STATUS Status; 212 ACPI_OPERAND_OBJECT *ObjDesc; 213 214 215 if (LookupStatus != AE_NOT_FOUND) 216 { 217 return (LookupStatus); 218 } 219 220 /* 221 * Table disassembly: 222 * OperationRegion not found. Generate an External for it, and 223 * insert the name into the namespace. 224 */ 225 AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_REGION, 0, 0); 226 227 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_REGION, 228 ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT, WalkState, Node); 229 if (ACPI_FAILURE (Status)) 230 { 231 return (Status); 232 } 233 234 /* Must create and install a region object for the new node */ 235 236 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION); 237 if (!ObjDesc) 238 { 239 return (AE_NO_MEMORY); 240 } 241 242 ObjDesc->Region.Node = *Node; 243 Status = AcpiNsAttachObject (*Node, ObjDesc, ACPI_TYPE_REGION); 244 return (Status); 245 } 246 #endif 247 248 249 /******************************************************************************* 250 * 251 * FUNCTION: AcpiDsCreateBufferField 252 * 253 * PARAMETERS: Op - Current parse op (CreateXXField) 254 * WalkState - Current state 255 * 256 * RETURN: Status 257 * 258 * DESCRIPTION: Execute the CreateField operators: 259 * CreateBitFieldOp, 260 * CreateByteFieldOp, 261 * CreateWordFieldOp, 262 * CreateDwordFieldOp, 263 * CreateQwordFieldOp, 264 * CreateFieldOp (all of which define a field in a buffer) 265 * 266 ******************************************************************************/ 267 268 ACPI_STATUS 269 AcpiDsCreateBufferField ( 270 ACPI_PARSE_OBJECT *Op, 271 ACPI_WALK_STATE *WalkState) 272 { 273 ACPI_PARSE_OBJECT *Arg; 274 ACPI_NAMESPACE_NODE *Node; 275 ACPI_STATUS Status; 276 ACPI_OPERAND_OBJECT *ObjDesc; 277 ACPI_OPERAND_OBJECT *SecondDesc = NULL; 278 UINT32 Flags; 279 280 281 ACPI_FUNCTION_TRACE (DsCreateBufferField); 282 283 284 /* 285 * Get the NameString argument (name of the new BufferField) 286 */ 287 if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP) 288 { 289 /* For CreateField, name is the 4th argument */ 290 291 Arg = AcpiPsGetArg (Op, 3); 292 } 293 else 294 { 295 /* For all other CreateXXXField operators, name is the 3rd argument */ 296 297 Arg = AcpiPsGetArg (Op, 2); 298 } 299 300 if (!Arg) 301 { 302 return_ACPI_STATUS (AE_AML_NO_OPERAND); 303 } 304 305 if (WalkState->DeferredNode) 306 { 307 Node = WalkState->DeferredNode; 308 Status = AE_OK; 309 } 310 else 311 { 312 /* Execute flag should always be set when this function is entered */ 313 314 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) 315 { 316 ACPI_ERROR ((AE_INFO, 317 "Parse execute mode is not set")); 318 return_ACPI_STATUS (AE_AML_INTERNAL); 319 } 320 321 /* Creating new namespace node, should not already exist */ 322 323 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 324 ACPI_NS_ERROR_IF_FOUND; 325 326 /* 327 * Mark node temporary if we are executing a normal control 328 * method. (Don't mark if this is a module-level code method) 329 */ 330 if (WalkState->MethodNode && 331 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) 332 { 333 Flags |= ACPI_NS_TEMPORARY; 334 } 335 336 /* Enter the NameString into the namespace */ 337 338 Status = AcpiNsLookup (WalkState->ScopeInfo, 339 Arg->Common.Value.String, ACPI_TYPE_ANY, 340 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node); 341 if (ACPI_FAILURE (Status)) 342 { 343 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 344 Arg->Common.Value.String, Status); 345 return_ACPI_STATUS (Status); 346 } 347 } 348 349 /* 350 * We could put the returned object (Node) on the object stack for later, 351 * but for now, we will put it in the "op" object that the parser uses, 352 * so we can get it again at the end of this scope. 353 */ 354 Op->Common.Node = Node; 355 356 /* 357 * If there is no object attached to the node, this node was just created 358 * and we need to create the field object. Otherwise, this was a lookup 359 * of an existing node and we don't want to create the field object again. 360 */ 361 ObjDesc = AcpiNsGetAttachedObject (Node); 362 if (ObjDesc) 363 { 364 return_ACPI_STATUS (AE_OK); 365 } 366 367 /* 368 * The Field definition is not fully parsed at this time. 369 * (We must save the address of the AML for the buffer and index operands) 370 */ 371 372 /* Create the buffer field object */ 373 374 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD); 375 if (!ObjDesc) 376 { 377 Status = AE_NO_MEMORY; 378 goto Cleanup; 379 } 380 381 /* 382 * Remember location in AML stream of the field unit opcode and operands 383 * -- since the buffer and index operands must be evaluated. 384 */ 385 SecondDesc = ObjDesc->Common.NextObject; 386 SecondDesc->Extra.AmlStart = Op->Named.Data; 387 SecondDesc->Extra.AmlLength = Op->Named.Length; 388 ObjDesc->BufferField.Node = Node; 389 390 /* Attach constructed field descriptors to parent node */ 391 392 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD); 393 if (ACPI_FAILURE (Status)) 394 { 395 goto Cleanup; 396 } 397 398 399 Cleanup: 400 401 /* Remove local reference to the object */ 402 403 AcpiUtRemoveReference (ObjDesc); 404 return_ACPI_STATUS (Status); 405 } 406 407 408 /******************************************************************************* 409 * 410 * FUNCTION: AcpiDsGetFieldNames 411 * 412 * PARAMETERS: Info - CreateField info structure 413 * ` WalkState - Current method state 414 * Arg - First parser arg for the field name list 415 * 416 * RETURN: Status 417 * 418 * DESCRIPTION: Process all named fields in a field declaration. Names are 419 * entered into the namespace. 420 * 421 ******************************************************************************/ 422 423 static ACPI_STATUS 424 AcpiDsGetFieldNames ( 425 ACPI_CREATE_FIELD_INFO *Info, 426 ACPI_WALK_STATE *WalkState, 427 ACPI_PARSE_OBJECT *Arg) 428 { 429 ACPI_STATUS Status; 430 UINT64 Position; 431 ACPI_PARSE_OBJECT *Child; 432 433 434 ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info); 435 436 437 /* First field starts at bit zero */ 438 439 Info->FieldBitPosition = 0; 440 441 /* Process all elements in the field list (of parse nodes) */ 442 443 while (Arg) 444 { 445 /* 446 * Four types of field elements are handled: 447 * 1) Name - Enters a new named field into the namespace 448 * 2) Offset - specifies a bit offset 449 * 3) AccessAs - changes the access mode/attributes 450 * 4) Connection - Associate a resource template with the field 451 */ 452 switch (Arg->Common.AmlOpcode) 453 { 454 case AML_INT_RESERVEDFIELD_OP: 455 456 Position = (UINT64) Info->FieldBitPosition + 457 (UINT64) Arg->Common.Value.Size; 458 459 if (Position > ACPI_UINT32_MAX) 460 { 461 ACPI_ERROR ((AE_INFO, 462 "Bit offset within field too large (> 0xFFFFFFFF)")); 463 return_ACPI_STATUS (AE_SUPPORT); 464 } 465 466 Info->FieldBitPosition = (UINT32) Position; 467 break; 468 469 case AML_INT_ACCESSFIELD_OP: 470 case AML_INT_EXTACCESSFIELD_OP: 471 /* 472 * Get new AccessType, AccessAttribute, and AccessLength fields 473 * -- to be used for all field units that follow, until the 474 * end-of-field or another AccessAs keyword is encountered. 475 * NOTE. These three bytes are encoded in the integer value 476 * of the parseop for convenience. 477 * 478 * In FieldFlags, preserve the flag bits other than the 479 * ACCESS_TYPE bits. 480 */ 481 482 /* AccessType (ByteAcc, WordAcc, etc.) */ 483 484 Info->FieldFlags = (UINT8) 485 ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | 486 ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07)))); 487 488 /* AccessAttribute (AttribQuick, AttribByte, etc.) */ 489 490 Info->Attribute = (UINT8) 491 ((Arg->Common.Value.Integer >> 8) & 0xFF); 492 493 /* AccessLength (for serial/buffer protocols) */ 494 495 Info->AccessLength = (UINT8) 496 ((Arg->Common.Value.Integer >> 16) & 0xFF); 497 break; 498 499 case AML_INT_CONNECTION_OP: 500 /* 501 * Clear any previous connection. New connection is used for all 502 * fields that follow, similar to AccessAs 503 */ 504 Info->ResourceBuffer = NULL; 505 Info->ConnectionNode = NULL; 506 Info->PinNumberIndex = 0; 507 508 /* 509 * A Connection() is either an actual resource descriptor (buffer) 510 * or a named reference to a resource template 511 */ 512 Child = Arg->Common.Value.Arg; 513 if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP) 514 { 515 Info->ResourceBuffer = Child->Named.Data; 516 Info->ResourceLength = (UINT16) Child->Named.Value.Integer; 517 } 518 else 519 { 520 /* Lookup the Connection() namepath, it should already exist */ 521 522 Status = AcpiNsLookup (WalkState->ScopeInfo, 523 Child->Common.Value.Name, ACPI_TYPE_ANY, 524 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, 525 WalkState, &Info->ConnectionNode); 526 if (ACPI_FAILURE (Status)) 527 { 528 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 529 Child->Common.Value.Name, Status); 530 return_ACPI_STATUS (Status); 531 } 532 } 533 break; 534 535 case AML_INT_NAMEDFIELD_OP: 536 537 /* Lookup the name, it should already exist */ 538 539 Status = AcpiNsLookup (WalkState->ScopeInfo, 540 (char *) &Arg->Named.Name, Info->FieldType, 541 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, 542 WalkState, &Info->FieldNode); 543 if (ACPI_FAILURE (Status)) 544 { 545 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 546 (char *) &Arg->Named.Name, Status); 547 return_ACPI_STATUS (Status); 548 } 549 else 550 { 551 Arg->Common.Node = Info->FieldNode; 552 Info->FieldBitLength = Arg->Common.Value.Size; 553 554 /* 555 * If there is no object attached to the node, this node was 556 * just created and we need to create the field object. 557 * Otherwise, this was a lookup of an existing node and we 558 * don't want to create the field object again. 559 */ 560 if (!AcpiNsGetAttachedObject (Info->FieldNode)) 561 { 562 Status = AcpiExPrepFieldValue (Info); 563 if (ACPI_FAILURE (Status)) 564 { 565 return_ACPI_STATUS (Status); 566 } 567 } 568 } 569 570 /* Keep track of bit position for the next field */ 571 572 Position = (UINT64) Info->FieldBitPosition + 573 (UINT64) Arg->Common.Value.Size; 574 575 if (Position > ACPI_UINT32_MAX) 576 { 577 ACPI_ERROR ((AE_INFO, 578 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", 579 ACPI_CAST_PTR (char, &Info->FieldNode->Name))); 580 return_ACPI_STATUS (AE_SUPPORT); 581 } 582 583 Info->FieldBitPosition += Info->FieldBitLength; 584 Info->PinNumberIndex++; /* Index relative to previous Connection() */ 585 break; 586 587 default: 588 589 ACPI_ERROR ((AE_INFO, 590 "Invalid opcode in field list: 0x%X", 591 Arg->Common.AmlOpcode)); 592 return_ACPI_STATUS (AE_AML_BAD_OPCODE); 593 } 594 595 Arg = Arg->Common.Next; 596 } 597 598 return_ACPI_STATUS (AE_OK); 599 } 600 601 602 /******************************************************************************* 603 * 604 * FUNCTION: AcpiDsCreateField 605 * 606 * PARAMETERS: Op - Op containing the Field definition and args 607 * RegionNode - Object for the containing Operation Region 608 * ` WalkState - Current method state 609 * 610 * RETURN: Status 611 * 612 * DESCRIPTION: Create a new field in the specified operation region 613 * 614 ******************************************************************************/ 615 616 ACPI_STATUS 617 AcpiDsCreateField ( 618 ACPI_PARSE_OBJECT *Op, 619 ACPI_NAMESPACE_NODE *RegionNode, 620 ACPI_WALK_STATE *WalkState) 621 { 622 ACPI_STATUS Status; 623 ACPI_PARSE_OBJECT *Arg; 624 ACPI_CREATE_FIELD_INFO Info; 625 626 627 ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op); 628 629 630 /* First arg is the name of the parent OpRegion (must already exist) */ 631 632 Arg = Op->Common.Value.Arg; 633 634 if (!RegionNode) 635 { 636 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 637 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 638 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 639 #ifdef ACPI_ASL_COMPILER 640 Status = AcpiDsCreateExternalRegion (Status, Arg, 641 Arg->Common.Value.Name, WalkState, &RegionNode); 642 #endif 643 if (ACPI_FAILURE (Status)) 644 { 645 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 646 Arg->Common.Value.Name, Status); 647 return_ACPI_STATUS (Status); 648 } 649 } 650 651 memset (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO)); 652 653 /* Second arg is the field flags */ 654 655 Arg = Arg->Common.Next; 656 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 657 Info.Attribute = 0; 658 659 /* Each remaining arg is a Named Field */ 660 661 Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD; 662 Info.RegionNode = RegionNode; 663 664 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 665 return_ACPI_STATUS (Status); 666 } 667 668 669 /******************************************************************************* 670 * 671 * FUNCTION: AcpiDsInitFieldObjects 672 * 673 * PARAMETERS: Op - Op containing the Field definition and args 674 * ` WalkState - Current method state 675 * 676 * RETURN: Status 677 * 678 * DESCRIPTION: For each "Field Unit" name in the argument list that is 679 * part of the field declaration, enter the name into the 680 * namespace. 681 * 682 ******************************************************************************/ 683 684 ACPI_STATUS 685 AcpiDsInitFieldObjects ( 686 ACPI_PARSE_OBJECT *Op, 687 ACPI_WALK_STATE *WalkState) 688 { 689 ACPI_STATUS Status; 690 ACPI_PARSE_OBJECT *Arg = NULL; 691 ACPI_NAMESPACE_NODE *Node; 692 UINT8 Type = 0; 693 UINT32 Flags; 694 695 696 ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op); 697 698 699 /* Execute flag should always be set when this function is entered */ 700 701 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) 702 { 703 if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP) 704 { 705 /* BankField Op is deferred, just return OK */ 706 707 return_ACPI_STATUS (AE_OK); 708 } 709 710 ACPI_ERROR ((AE_INFO, 711 "Parse deferred mode is not set")); 712 return_ACPI_STATUS (AE_AML_INTERNAL); 713 } 714 715 /* 716 * Get the FieldList argument for this opcode. This is the start of the 717 * list of field elements. 718 */ 719 switch (WalkState->Opcode) 720 { 721 case AML_FIELD_OP: 722 723 Arg = AcpiPsGetArg (Op, 2); 724 Type = ACPI_TYPE_LOCAL_REGION_FIELD; 725 break; 726 727 case AML_BANK_FIELD_OP: 728 729 Arg = AcpiPsGetArg (Op, 4); 730 Type = ACPI_TYPE_LOCAL_BANK_FIELD; 731 break; 732 733 case AML_INDEX_FIELD_OP: 734 735 Arg = AcpiPsGetArg (Op, 3); 736 Type = ACPI_TYPE_LOCAL_INDEX_FIELD; 737 break; 738 739 default: 740 741 return_ACPI_STATUS (AE_BAD_PARAMETER); 742 } 743 744 /* Creating new namespace node(s), should not already exist */ 745 746 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 747 ACPI_NS_ERROR_IF_FOUND; 748 749 /* 750 * Mark node(s) temporary if we are executing a normal control 751 * method. (Don't mark if this is a module-level code method) 752 */ 753 if (WalkState->MethodNode && 754 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) 755 { 756 Flags |= ACPI_NS_TEMPORARY; 757 } 758 759 /* 760 * Walk the list of entries in the FieldList 761 * Note: FieldList can be of zero length. In this case, Arg will be NULL. 762 */ 763 while (Arg) 764 { 765 /* 766 * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested 767 * in the field names in order to enter them into the namespace. 768 */ 769 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP) 770 { 771 Status = AcpiNsLookup (WalkState->ScopeInfo, 772 (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1, 773 Flags, WalkState, &Node); 774 if (ACPI_FAILURE (Status)) 775 { 776 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 777 (char *) &Arg->Named.Name, Status); 778 if (Status != AE_ALREADY_EXISTS) 779 { 780 return_ACPI_STATUS (Status); 781 } 782 783 /* Name already exists, just ignore this error */ 784 785 Status = AE_OK; 786 } 787 788 Arg->Common.Node = Node; 789 } 790 791 /* Get the next field element in the list */ 792 793 Arg = Arg->Common.Next; 794 } 795 796 return_ACPI_STATUS (AE_OK); 797 } 798 799 800 /******************************************************************************* 801 * 802 * FUNCTION: AcpiDsCreateBankField 803 * 804 * PARAMETERS: Op - Op containing the Field definition and args 805 * RegionNode - Object for the containing Operation Region 806 * WalkState - Current method state 807 * 808 * RETURN: Status 809 * 810 * DESCRIPTION: Create a new bank field in the specified operation region 811 * 812 ******************************************************************************/ 813 814 ACPI_STATUS 815 AcpiDsCreateBankField ( 816 ACPI_PARSE_OBJECT *Op, 817 ACPI_NAMESPACE_NODE *RegionNode, 818 ACPI_WALK_STATE *WalkState) 819 { 820 ACPI_STATUS Status; 821 ACPI_PARSE_OBJECT *Arg; 822 ACPI_CREATE_FIELD_INFO Info; 823 824 825 ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op); 826 827 828 /* First arg is the name of the parent OpRegion (must already exist) */ 829 830 Arg = Op->Common.Value.Arg; 831 if (!RegionNode) 832 { 833 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 834 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 835 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 836 #ifdef ACPI_ASL_COMPILER 837 Status = AcpiDsCreateExternalRegion (Status, Arg, 838 Arg->Common.Value.Name, WalkState, &RegionNode); 839 #endif 840 if (ACPI_FAILURE (Status)) 841 { 842 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 843 Arg->Common.Value.Name, Status); 844 return_ACPI_STATUS (Status); 845 } 846 } 847 848 /* Second arg is the Bank Register (Field) (must already exist) */ 849 850 Arg = Arg->Common.Next; 851 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 852 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 853 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 854 if (ACPI_FAILURE (Status)) 855 { 856 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 857 Arg->Common.Value.String, Status); 858 return_ACPI_STATUS (Status); 859 } 860 861 /* 862 * Third arg is the BankValue 863 * This arg is a TermArg, not a constant 864 * It will be evaluated later, by AcpiDsEvalBankFieldOperands 865 */ 866 Arg = Arg->Common.Next; 867 868 /* Fourth arg is the field flags */ 869 870 Arg = Arg->Common.Next; 871 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 872 873 /* Each remaining arg is a Named Field */ 874 875 Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD; 876 Info.RegionNode = RegionNode; 877 878 /* 879 * Use Info.DataRegisterNode to store BankField Op 880 * It's safe because DataRegisterNode will never be used when create 881 * bank field \we store AmlStart and AmlLength in the BankField Op for 882 * late evaluation. Used in AcpiExPrepFieldValue(Info) 883 * 884 * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like 885 * "void *ParentOp"? 886 */ 887 Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op; 888 889 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 890 return_ACPI_STATUS (Status); 891 } 892 893 894 /******************************************************************************* 895 * 896 * FUNCTION: AcpiDsCreateIndexField 897 * 898 * PARAMETERS: Op - Op containing the Field definition and args 899 * RegionNode - Object for the containing Operation Region 900 * ` WalkState - Current method state 901 * 902 * RETURN: Status 903 * 904 * DESCRIPTION: Create a new index field in the specified operation region 905 * 906 ******************************************************************************/ 907 908 ACPI_STATUS 909 AcpiDsCreateIndexField ( 910 ACPI_PARSE_OBJECT *Op, 911 ACPI_NAMESPACE_NODE *RegionNode, 912 ACPI_WALK_STATE *WalkState) 913 { 914 ACPI_STATUS Status; 915 ACPI_PARSE_OBJECT *Arg; 916 ACPI_CREATE_FIELD_INFO Info; 917 918 919 ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op); 920 921 922 /* First arg is the name of the Index register (must already exist) */ 923 924 Arg = Op->Common.Value.Arg; 925 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 926 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 927 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 928 if (ACPI_FAILURE (Status)) 929 { 930 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 931 Arg->Common.Value.String, Status); 932 return_ACPI_STATUS (Status); 933 } 934 935 /* Second arg is the data register (must already exist) */ 936 937 Arg = Arg->Common.Next; 938 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 939 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 940 ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode); 941 if (ACPI_FAILURE (Status)) 942 { 943 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 944 Arg->Common.Value.String, Status); 945 return_ACPI_STATUS (Status); 946 } 947 948 /* Next arg is the field flags */ 949 950 Arg = Arg->Common.Next; 951 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 952 953 /* Each remaining arg is a Named Field */ 954 955 Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD; 956 Info.RegionNode = RegionNode; 957 958 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 959 return_ACPI_STATUS (Status); 960 } 961