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 - 2021, 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 #ifdef ACPI_EXEC_APP 161 #include "aecommon.h" 162 #endif 163 164 165 #define _COMPONENT ACPI_DISPATCHER 166 ACPI_MODULE_NAME ("dsfield") 167 168 /* Local prototypes */ 169 170 #ifdef ACPI_ASL_COMPILER 171 #include "acdisasm.h" 172 173 static ACPI_STATUS 174 AcpiDsCreateExternalRegion ( 175 ACPI_STATUS LookupStatus, 176 ACPI_PARSE_OBJECT *Op, 177 char *Path, 178 ACPI_WALK_STATE *WalkState, 179 ACPI_NAMESPACE_NODE **Node); 180 #endif 181 182 static ACPI_STATUS 183 AcpiDsGetFieldNames ( 184 ACPI_CREATE_FIELD_INFO *Info, 185 ACPI_WALK_STATE *WalkState, 186 ACPI_PARSE_OBJECT *Arg); 187 188 189 #ifdef ACPI_ASL_COMPILER 190 /******************************************************************************* 191 * 192 * FUNCTION: AcpiDsCreateExternalRegion (iASL Disassembler only) 193 * 194 * PARAMETERS: LookupStatus - Status from NsLookup operation 195 * Op - Op containing the Field definition and args 196 * Path - Pathname of the region 197 * ` WalkState - Current method state 198 * Node - Where the new region node is returned 199 * 200 * RETURN: Status 201 * 202 * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new 203 * region node/object. 204 * 205 ******************************************************************************/ 206 207 static ACPI_STATUS 208 AcpiDsCreateExternalRegion ( 209 ACPI_STATUS LookupStatus, 210 ACPI_PARSE_OBJECT *Op, 211 char *Path, 212 ACPI_WALK_STATE *WalkState, 213 ACPI_NAMESPACE_NODE **Node) 214 { 215 ACPI_STATUS Status; 216 ACPI_OPERAND_OBJECT *ObjDesc; 217 218 219 if (LookupStatus != AE_NOT_FOUND) 220 { 221 return (LookupStatus); 222 } 223 224 /* 225 * Table disassembly: 226 * OperationRegion not found. Generate an External for it, and 227 * insert the name into the namespace. 228 */ 229 AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_REGION, 0, 0); 230 231 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_REGION, 232 ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT, WalkState, Node); 233 if (ACPI_FAILURE (Status)) 234 { 235 return (Status); 236 } 237 238 /* Must create and install a region object for the new node */ 239 240 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION); 241 if (!ObjDesc) 242 { 243 return (AE_NO_MEMORY); 244 } 245 246 ObjDesc->Region.Node = *Node; 247 Status = AcpiNsAttachObject (*Node, ObjDesc, ACPI_TYPE_REGION); 248 return (Status); 249 } 250 #endif 251 252 253 /******************************************************************************* 254 * 255 * FUNCTION: AcpiDsCreateBufferField 256 * 257 * PARAMETERS: Op - Current parse op (CreateXXField) 258 * WalkState - Current state 259 * 260 * RETURN: Status 261 * 262 * DESCRIPTION: Execute the CreateField operators: 263 * CreateBitFieldOp, 264 * CreateByteFieldOp, 265 * CreateWordFieldOp, 266 * CreateDwordFieldOp, 267 * CreateQwordFieldOp, 268 * CreateFieldOp (all of which define a field in a buffer) 269 * 270 ******************************************************************************/ 271 272 ACPI_STATUS 273 AcpiDsCreateBufferField ( 274 ACPI_PARSE_OBJECT *Op, 275 ACPI_WALK_STATE *WalkState) 276 { 277 ACPI_PARSE_OBJECT *Arg; 278 ACPI_NAMESPACE_NODE *Node; 279 ACPI_STATUS Status; 280 ACPI_OPERAND_OBJECT *ObjDesc; 281 ACPI_OPERAND_OBJECT *SecondDesc = NULL; 282 UINT32 Flags; 283 284 285 ACPI_FUNCTION_TRACE (DsCreateBufferField); 286 287 288 /* 289 * Get the NameString argument (name of the new BufferField) 290 */ 291 if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP) 292 { 293 /* For CreateField, name is the 4th argument */ 294 295 Arg = AcpiPsGetArg (Op, 3); 296 } 297 else 298 { 299 /* For all other CreateXXXField operators, name is the 3rd argument */ 300 301 Arg = AcpiPsGetArg (Op, 2); 302 } 303 304 if (!Arg) 305 { 306 return_ACPI_STATUS (AE_AML_NO_OPERAND); 307 } 308 309 if (WalkState->DeferredNode) 310 { 311 Node = WalkState->DeferredNode; 312 } 313 else 314 { 315 /* Execute flag should always be set when this function is entered */ 316 317 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) 318 { 319 ACPI_ERROR ((AE_INFO, 320 "Parse execute mode is not set")); 321 return_ACPI_STATUS (AE_AML_INTERNAL); 322 } 323 324 /* Creating new namespace node, should not already exist */ 325 326 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 327 ACPI_NS_ERROR_IF_FOUND; 328 329 /* 330 * Mark node temporary if we are executing a normal control 331 * method. (Don't mark if this is a module-level code method) 332 */ 333 if (WalkState->MethodNode && 334 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) 335 { 336 Flags |= ACPI_NS_TEMPORARY; 337 } 338 339 /* Enter the NameString into the namespace */ 340 341 Status = AcpiNsLookup (WalkState->ScopeInfo, 342 Arg->Common.Value.String, ACPI_TYPE_ANY, 343 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node); 344 if ((WalkState->ParseFlags & ACPI_PARSE_DISASSEMBLE) && 345 Status == AE_ALREADY_EXISTS) 346 { 347 Status = AE_OK; 348 } 349 else if (ACPI_FAILURE (Status)) 350 { 351 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 352 Arg->Common.Value.String, Status); 353 return_ACPI_STATUS (Status); 354 } 355 } 356 357 /* 358 * We could put the returned object (Node) on the object stack for later, 359 * but for now, we will put it in the "op" object that the parser uses, 360 * so we can get it again at the end of this scope. 361 */ 362 Op->Common.Node = Node; 363 364 /* 365 * If there is no object attached to the node, this node was just created 366 * and we need to create the field object. Otherwise, this was a lookup 367 * of an existing node and we don't want to create the field object again. 368 */ 369 ObjDesc = AcpiNsGetAttachedObject (Node); 370 if (ObjDesc) 371 { 372 return_ACPI_STATUS (AE_OK); 373 } 374 375 /* 376 * The Field definition is not fully parsed at this time. 377 * (We must save the address of the AML for the buffer and index operands) 378 */ 379 380 /* Create the buffer field object */ 381 382 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD); 383 if (!ObjDesc) 384 { 385 Status = AE_NO_MEMORY; 386 goto Cleanup; 387 } 388 389 /* 390 * Remember location in AML stream of the field unit opcode and operands 391 * -- since the buffer and index operands must be evaluated. 392 */ 393 SecondDesc = ObjDesc->Common.NextObject; 394 SecondDesc->Extra.AmlStart = Op->Named.Data; 395 SecondDesc->Extra.AmlLength = Op->Named.Length; 396 ObjDesc->BufferField.Node = Node; 397 398 /* Attach constructed field descriptors to parent node */ 399 400 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD); 401 if (ACPI_FAILURE (Status)) 402 { 403 goto Cleanup; 404 } 405 406 407 Cleanup: 408 409 /* Remove local reference to the object */ 410 411 AcpiUtRemoveReference (ObjDesc); 412 return_ACPI_STATUS (Status); 413 } 414 415 416 /******************************************************************************* 417 * 418 * FUNCTION: AcpiDsGetFieldNames 419 * 420 * PARAMETERS: Info - CreateField info structure 421 * WalkState - Current method state 422 * Arg - First parser arg for the field name list 423 * 424 * RETURN: Status 425 * 426 * DESCRIPTION: Process all named fields in a field declaration. Names are 427 * entered into the namespace. 428 * 429 ******************************************************************************/ 430 431 static ACPI_STATUS 432 AcpiDsGetFieldNames ( 433 ACPI_CREATE_FIELD_INFO *Info, 434 ACPI_WALK_STATE *WalkState, 435 ACPI_PARSE_OBJECT *Arg) 436 { 437 ACPI_STATUS Status; 438 UINT64 Position; 439 ACPI_PARSE_OBJECT *Child; 440 441 #ifdef ACPI_EXEC_APP 442 ACPI_OPERAND_OBJECT *ResultDesc; 443 ACPI_OPERAND_OBJECT *ObjDesc; 444 char *NamePath; 445 #endif 446 447 448 ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info); 449 450 451 /* First field starts at bit zero */ 452 453 Info->FieldBitPosition = 0; 454 455 /* Process all elements in the field list (of parse nodes) */ 456 457 while (Arg) 458 { 459 /* 460 * Four types of field elements are handled: 461 * 1) Name - Enters a new named field into the namespace 462 * 2) Offset - specifies a bit offset 463 * 3) AccessAs - changes the access mode/attributes 464 * 4) Connection - Associate a resource template with the field 465 */ 466 switch (Arg->Common.AmlOpcode) 467 { 468 case AML_INT_RESERVEDFIELD_OP: 469 470 Position = (UINT64) Info->FieldBitPosition + 471 (UINT64) Arg->Common.Value.Size; 472 473 if (Position > ACPI_UINT32_MAX) 474 { 475 ACPI_ERROR ((AE_INFO, 476 "Bit offset within field too large (> 0xFFFFFFFF)")); 477 return_ACPI_STATUS (AE_SUPPORT); 478 } 479 480 Info->FieldBitPosition = (UINT32) Position; 481 break; 482 483 case AML_INT_ACCESSFIELD_OP: 484 case AML_INT_EXTACCESSFIELD_OP: 485 /* 486 * Get new AccessType, AccessAttribute, and AccessLength fields 487 * -- to be used for all field units that follow, until the 488 * end-of-field or another AccessAs keyword is encountered. 489 * NOTE. These three bytes are encoded in the integer value 490 * of the parseop for convenience. 491 * 492 * In FieldFlags, preserve the flag bits other than the 493 * ACCESS_TYPE bits. 494 */ 495 496 /* AccessType (ByteAcc, WordAcc, etc.) */ 497 498 Info->FieldFlags = (UINT8) 499 ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | 500 ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07)))); 501 502 /* AccessAttribute (AttribQuick, AttribByte, etc.) */ 503 504 Info->Attribute = (UINT8) 505 ((Arg->Common.Value.Integer >> 8) & 0xFF); 506 507 /* AccessLength (for serial/buffer protocols) */ 508 509 Info->AccessLength = (UINT8) 510 ((Arg->Common.Value.Integer >> 16) & 0xFF); 511 break; 512 513 case AML_INT_CONNECTION_OP: 514 /* 515 * Clear any previous connection. New connection is used for all 516 * fields that follow, similar to AccessAs 517 */ 518 Info->ResourceBuffer = NULL; 519 Info->ConnectionNode = NULL; 520 Info->PinNumberIndex = 0; 521 522 /* 523 * A Connection() is either an actual resource descriptor (buffer) 524 * or a named reference to a resource template 525 */ 526 Child = Arg->Common.Value.Arg; 527 if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP) 528 { 529 Info->ResourceBuffer = Child->Named.Data; 530 Info->ResourceLength = (UINT16) Child->Named.Value.Integer; 531 } 532 else 533 { 534 /* Lookup the Connection() namepath, it should already exist */ 535 536 Status = AcpiNsLookup (WalkState->ScopeInfo, 537 Child->Common.Value.Name, ACPI_TYPE_ANY, 538 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, 539 WalkState, &Info->ConnectionNode); 540 if (ACPI_FAILURE (Status)) 541 { 542 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 543 Child->Common.Value.Name, Status); 544 return_ACPI_STATUS (Status); 545 } 546 } 547 break; 548 549 case AML_INT_NAMEDFIELD_OP: 550 551 /* Lookup the name, it should already exist */ 552 553 Status = AcpiNsLookup (WalkState->ScopeInfo, 554 (char *) &Arg->Named.Name, Info->FieldType, 555 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, 556 WalkState, &Info->FieldNode); 557 if (ACPI_FAILURE (Status)) 558 { 559 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 560 (char *) &Arg->Named.Name, Status); 561 return_ACPI_STATUS (Status); 562 } 563 else 564 { 565 Arg->Common.Node = Info->FieldNode; 566 Info->FieldBitLength = Arg->Common.Value.Size; 567 568 /* 569 * If there is no object attached to the node, this node was 570 * just created and we need to create the field object. 571 * Otherwise, this was a lookup of an existing node and we 572 * don't want to create the field object again. 573 */ 574 if (!AcpiNsGetAttachedObject (Info->FieldNode)) 575 { 576 Status = AcpiExPrepFieldValue (Info); 577 if (ACPI_FAILURE (Status)) 578 { 579 return_ACPI_STATUS (Status); 580 } 581 #ifdef ACPI_EXEC_APP 582 NamePath = AcpiNsGetExternalPathname (Info->FieldNode); 583 if (ACPI_SUCCESS (AeLookupInitFileEntry (NamePath, &ObjDesc))) 584 { 585 AcpiExWriteDataToField (ObjDesc, 586 AcpiNsGetAttachedObject (Info->FieldNode), 587 &ResultDesc); 588 AcpiUtRemoveReference (ObjDesc); 589 } 590 ACPI_FREE (NamePath); 591 #endif 592 } 593 } 594 595 /* Keep track of bit position for the next field */ 596 597 Position = (UINT64) Info->FieldBitPosition + 598 (UINT64) Arg->Common.Value.Size; 599 600 if (Position > ACPI_UINT32_MAX) 601 { 602 ACPI_ERROR ((AE_INFO, 603 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", 604 ACPI_CAST_PTR (char, &Info->FieldNode->Name))); 605 return_ACPI_STATUS (AE_SUPPORT); 606 } 607 608 Info->FieldBitPosition += Info->FieldBitLength; 609 Info->PinNumberIndex++; /* Index relative to previous Connection() */ 610 break; 611 612 default: 613 614 ACPI_ERROR ((AE_INFO, 615 "Invalid opcode in field list: 0x%X", 616 Arg->Common.AmlOpcode)); 617 return_ACPI_STATUS (AE_AML_BAD_OPCODE); 618 } 619 620 Arg = Arg->Common.Next; 621 } 622 623 return_ACPI_STATUS (AE_OK); 624 } 625 626 627 /******************************************************************************* 628 * 629 * FUNCTION: AcpiDsCreateField 630 * 631 * PARAMETERS: Op - Op containing the Field definition and args 632 * RegionNode - Object for the containing Operation Region 633 * ` WalkState - Current method state 634 * 635 * RETURN: Status 636 * 637 * DESCRIPTION: Create a new field in the specified operation region 638 * 639 ******************************************************************************/ 640 641 ACPI_STATUS 642 AcpiDsCreateField ( 643 ACPI_PARSE_OBJECT *Op, 644 ACPI_NAMESPACE_NODE *RegionNode, 645 ACPI_WALK_STATE *WalkState) 646 { 647 ACPI_STATUS Status; 648 ACPI_PARSE_OBJECT *Arg; 649 ACPI_CREATE_FIELD_INFO Info; 650 651 652 ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op); 653 654 655 /* First arg is the name of the parent OpRegion (must already exist) */ 656 657 Arg = Op->Common.Value.Arg; 658 659 if (!RegionNode) 660 { 661 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 662 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 663 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 664 #ifdef ACPI_ASL_COMPILER 665 Status = AcpiDsCreateExternalRegion (Status, Arg, 666 Arg->Common.Value.Name, WalkState, &RegionNode); 667 #endif 668 if (ACPI_FAILURE (Status)) 669 { 670 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 671 Arg->Common.Value.Name, Status); 672 return_ACPI_STATUS (Status); 673 } 674 } 675 676 memset (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO)); 677 678 /* Second arg is the field flags */ 679 680 Arg = Arg->Common.Next; 681 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 682 Info.Attribute = 0; 683 684 /* Each remaining arg is a Named Field */ 685 686 Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD; 687 Info.RegionNode = RegionNode; 688 689 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 690 if (ACPI_FAILURE (Status)) 691 { 692 return_ACPI_STATUS (Status); 693 } 694 695 if (Info.RegionNode->Object->Region.SpaceId == ACPI_ADR_SPACE_PLATFORM_COMM) 696 { 697 RegionNode->Object->Field.InternalPccBuffer = 698 ACPI_ALLOCATE_ZEROED(Info.RegionNode->Object->Region.Length); 699 if (!RegionNode->Object->Field.InternalPccBuffer) 700 { 701 return_ACPI_STATUS (AE_NO_MEMORY); 702 } 703 } 704 705 return_ACPI_STATUS (Status); 706 } 707 708 709 /******************************************************************************* 710 * 711 * FUNCTION: AcpiDsInitFieldObjects 712 * 713 * PARAMETERS: Op - Op containing the Field definition and args 714 * ` WalkState - Current method state 715 * 716 * RETURN: Status 717 * 718 * DESCRIPTION: For each "Field Unit" name in the argument list that is 719 * part of the field declaration, enter the name into the 720 * namespace. 721 * 722 ******************************************************************************/ 723 724 ACPI_STATUS 725 AcpiDsInitFieldObjects ( 726 ACPI_PARSE_OBJECT *Op, 727 ACPI_WALK_STATE *WalkState) 728 { 729 ACPI_STATUS Status; 730 ACPI_PARSE_OBJECT *Arg = NULL; 731 ACPI_NAMESPACE_NODE *Node; 732 UINT8 Type = 0; 733 UINT32 Flags; 734 735 736 ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op); 737 738 739 /* Execute flag should always be set when this function is entered */ 740 741 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) 742 { 743 if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP) 744 { 745 /* BankField Op is deferred, just return OK */ 746 747 return_ACPI_STATUS (AE_OK); 748 } 749 750 ACPI_ERROR ((AE_INFO, 751 "Parse deferred mode is not set")); 752 return_ACPI_STATUS (AE_AML_INTERNAL); 753 } 754 755 /* 756 * Get the FieldList argument for this opcode. This is the start of the 757 * list of field elements. 758 */ 759 switch (WalkState->Opcode) 760 { 761 case AML_FIELD_OP: 762 763 Arg = AcpiPsGetArg (Op, 2); 764 Type = ACPI_TYPE_LOCAL_REGION_FIELD; 765 break; 766 767 case AML_BANK_FIELD_OP: 768 769 Arg = AcpiPsGetArg (Op, 4); 770 Type = ACPI_TYPE_LOCAL_BANK_FIELD; 771 break; 772 773 case AML_INDEX_FIELD_OP: 774 775 Arg = AcpiPsGetArg (Op, 3); 776 Type = ACPI_TYPE_LOCAL_INDEX_FIELD; 777 break; 778 779 default: 780 781 return_ACPI_STATUS (AE_BAD_PARAMETER); 782 } 783 784 /* Creating new namespace node(s), should not already exist */ 785 786 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 787 ACPI_NS_ERROR_IF_FOUND; 788 789 /* 790 * Mark node(s) temporary if we are executing a normal control 791 * method. (Don't mark if this is a module-level code method) 792 */ 793 if (WalkState->MethodNode && 794 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) 795 { 796 Flags |= ACPI_NS_TEMPORARY; 797 } 798 799 #ifdef ACPI_EXEC_APP 800 Flags |= ACPI_NS_OVERRIDE_IF_FOUND; 801 #endif 802 /* 803 * Walk the list of entries in the FieldList 804 * Note: FieldList can be of zero length. In this case, Arg will be NULL. 805 */ 806 while (Arg) 807 { 808 /* 809 * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested 810 * in the field names in order to enter them into the namespace. 811 */ 812 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP) 813 { 814 Status = AcpiNsLookup (WalkState->ScopeInfo, 815 (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1, 816 Flags, WalkState, &Node); 817 if (ACPI_FAILURE (Status)) 818 { 819 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 820 (char *) &Arg->Named.Name, Status); 821 if (Status != AE_ALREADY_EXISTS) 822 { 823 return_ACPI_STATUS (Status); 824 } 825 826 /* Name already exists, just ignore this error */ 827 } 828 829 Arg->Common.Node = Node; 830 } 831 832 /* Get the next field element in the list */ 833 834 Arg = Arg->Common.Next; 835 } 836 837 return_ACPI_STATUS (AE_OK); 838 } 839 840 841 /******************************************************************************* 842 * 843 * FUNCTION: AcpiDsCreateBankField 844 * 845 * PARAMETERS: Op - Op containing the Field definition and args 846 * RegionNode - Object for the containing Operation Region 847 * WalkState - Current method state 848 * 849 * RETURN: Status 850 * 851 * DESCRIPTION: Create a new bank field in the specified operation region 852 * 853 ******************************************************************************/ 854 855 ACPI_STATUS 856 AcpiDsCreateBankField ( 857 ACPI_PARSE_OBJECT *Op, 858 ACPI_NAMESPACE_NODE *RegionNode, 859 ACPI_WALK_STATE *WalkState) 860 { 861 ACPI_STATUS Status; 862 ACPI_PARSE_OBJECT *Arg; 863 ACPI_CREATE_FIELD_INFO Info; 864 865 866 ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op); 867 868 869 /* First arg is the name of the parent OpRegion (must already exist) */ 870 871 Arg = Op->Common.Value.Arg; 872 if (!RegionNode) 873 { 874 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 875 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 876 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 877 #ifdef ACPI_ASL_COMPILER 878 Status = AcpiDsCreateExternalRegion (Status, Arg, 879 Arg->Common.Value.Name, WalkState, &RegionNode); 880 #endif 881 if (ACPI_FAILURE (Status)) 882 { 883 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 884 Arg->Common.Value.Name, Status); 885 return_ACPI_STATUS (Status); 886 } 887 } 888 889 /* Second arg is the Bank Register (Field) (must already exist) */ 890 891 Arg = Arg->Common.Next; 892 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 893 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 894 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 895 if (ACPI_FAILURE (Status)) 896 { 897 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 898 Arg->Common.Value.String, Status); 899 return_ACPI_STATUS (Status); 900 } 901 902 /* 903 * Third arg is the BankValue 904 * This arg is a TermArg, not a constant 905 * It will be evaluated later, by AcpiDsEvalBankFieldOperands 906 */ 907 Arg = Arg->Common.Next; 908 909 /* Fourth arg is the field flags */ 910 911 Arg = Arg->Common.Next; 912 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 913 914 /* Each remaining arg is a Named Field */ 915 916 Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD; 917 Info.RegionNode = RegionNode; 918 919 /* 920 * Use Info.DataRegisterNode to store BankField Op 921 * It's safe because DataRegisterNode will never be used when create 922 * bank field \we store AmlStart and AmlLength in the BankField Op for 923 * late evaluation. Used in AcpiExPrepFieldValue(Info) 924 * 925 * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like 926 * "void *ParentOp"? 927 */ 928 Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op; 929 930 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 931 return_ACPI_STATUS (Status); 932 } 933 934 935 /******************************************************************************* 936 * 937 * FUNCTION: AcpiDsCreateIndexField 938 * 939 * PARAMETERS: Op - Op containing the Field definition and args 940 * RegionNode - Object for the containing Operation Region 941 * ` WalkState - Current method state 942 * 943 * RETURN: Status 944 * 945 * DESCRIPTION: Create a new index field in the specified operation region 946 * 947 ******************************************************************************/ 948 949 ACPI_STATUS 950 AcpiDsCreateIndexField ( 951 ACPI_PARSE_OBJECT *Op, 952 ACPI_NAMESPACE_NODE *RegionNode, 953 ACPI_WALK_STATE *WalkState) 954 { 955 ACPI_STATUS Status; 956 ACPI_PARSE_OBJECT *Arg; 957 ACPI_CREATE_FIELD_INFO Info; 958 959 960 ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op); 961 962 963 /* First arg is the name of the Index register (must already exist) */ 964 965 Arg = Op->Common.Value.Arg; 966 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 967 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 968 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 969 if (ACPI_FAILURE (Status)) 970 { 971 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 972 Arg->Common.Value.String, Status); 973 return_ACPI_STATUS (Status); 974 } 975 976 /* Second arg is the data register (must already exist) */ 977 978 Arg = Arg->Common.Next; 979 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 980 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 981 ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode); 982 if (ACPI_FAILURE (Status)) 983 { 984 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 985 Arg->Common.Value.String, Status); 986 return_ACPI_STATUS (Status); 987 } 988 989 /* Next arg is the field flags */ 990 991 Arg = Arg->Common.Next; 992 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 993 994 /* Each remaining arg is a Named Field */ 995 996 Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD; 997 Info.RegionNode = RegionNode; 998 999 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 1000 return_ACPI_STATUS (Status); 1001 } 1002