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 - 2019, 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 Status = AE_OK; 313 } 314 else 315 { 316 /* Execute flag should always be set when this function is entered */ 317 318 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) 319 { 320 ACPI_ERROR ((AE_INFO, 321 "Parse execute mode is not set")); 322 return_ACPI_STATUS (AE_AML_INTERNAL); 323 } 324 325 /* Creating new namespace node, should not already exist */ 326 327 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 328 ACPI_NS_ERROR_IF_FOUND; 329 330 /* 331 * Mark node temporary if we are executing a normal control 332 * method. (Don't mark if this is a module-level code method) 333 */ 334 if (WalkState->MethodNode && 335 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) 336 { 337 Flags |= ACPI_NS_TEMPORARY; 338 } 339 340 /* Enter the NameString into the namespace */ 341 342 Status = AcpiNsLookup (WalkState->ScopeInfo, 343 Arg->Common.Value.String, ACPI_TYPE_ANY, 344 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node); 345 if (ACPI_FAILURE (Status)) 346 { 347 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 348 Arg->Common.Value.String, Status); 349 return_ACPI_STATUS (Status); 350 } 351 } 352 353 /* 354 * We could put the returned object (Node) on the object stack for later, 355 * but for now, we will put it in the "op" object that the parser uses, 356 * so we can get it again at the end of this scope. 357 */ 358 Op->Common.Node = Node; 359 360 /* 361 * If there is no object attached to the node, this node was just created 362 * and we need to create the field object. Otherwise, this was a lookup 363 * of an existing node and we don't want to create the field object again. 364 */ 365 ObjDesc = AcpiNsGetAttachedObject (Node); 366 if (ObjDesc) 367 { 368 return_ACPI_STATUS (AE_OK); 369 } 370 371 /* 372 * The Field definition is not fully parsed at this time. 373 * (We must save the address of the AML for the buffer and index operands) 374 */ 375 376 /* Create the buffer field object */ 377 378 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD); 379 if (!ObjDesc) 380 { 381 Status = AE_NO_MEMORY; 382 goto Cleanup; 383 } 384 385 /* 386 * Remember location in AML stream of the field unit opcode and operands 387 * -- since the buffer and index operands must be evaluated. 388 */ 389 SecondDesc = ObjDesc->Common.NextObject; 390 SecondDesc->Extra.AmlStart = Op->Named.Data; 391 SecondDesc->Extra.AmlLength = Op->Named.Length; 392 ObjDesc->BufferField.Node = Node; 393 394 /* Attach constructed field descriptors to parent node */ 395 396 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD); 397 if (ACPI_FAILURE (Status)) 398 { 399 goto Cleanup; 400 } 401 402 403 Cleanup: 404 405 /* Remove local reference to the object */ 406 407 AcpiUtRemoveReference (ObjDesc); 408 return_ACPI_STATUS (Status); 409 } 410 411 412 /******************************************************************************* 413 * 414 * FUNCTION: AcpiDsGetFieldNames 415 * 416 * PARAMETERS: Info - CreateField info structure 417 * ` WalkState - Current method state 418 * Arg - First parser arg for the field name list 419 * 420 * RETURN: Status 421 * 422 * DESCRIPTION: Process all named fields in a field declaration. Names are 423 * entered into the namespace. 424 * 425 ******************************************************************************/ 426 427 static ACPI_STATUS 428 AcpiDsGetFieldNames ( 429 ACPI_CREATE_FIELD_INFO *Info, 430 ACPI_WALK_STATE *WalkState, 431 ACPI_PARSE_OBJECT *Arg) 432 { 433 ACPI_STATUS Status; 434 UINT64 Position; 435 ACPI_PARSE_OBJECT *Child; 436 437 #ifdef ACPI_EXEC_APP 438 UINT64 Value = 0; 439 ACPI_OPERAND_OBJECT *ResultDesc; 440 ACPI_OPERAND_OBJECT *ObjDesc; 441 char *NamePath; 442 #endif 443 444 445 ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info); 446 447 448 /* First field starts at bit zero */ 449 450 Info->FieldBitPosition = 0; 451 452 /* Process all elements in the field list (of parse nodes) */ 453 454 while (Arg) 455 { 456 /* 457 * Four types of field elements are handled: 458 * 1) Name - Enters a new named field into the namespace 459 * 2) Offset - specifies a bit offset 460 * 3) AccessAs - changes the access mode/attributes 461 * 4) Connection - Associate a resource template with the field 462 */ 463 switch (Arg->Common.AmlOpcode) 464 { 465 case AML_INT_RESERVEDFIELD_OP: 466 467 Position = (UINT64) Info->FieldBitPosition + 468 (UINT64) Arg->Common.Value.Size; 469 470 if (Position > ACPI_UINT32_MAX) 471 { 472 ACPI_ERROR ((AE_INFO, 473 "Bit offset within field too large (> 0xFFFFFFFF)")); 474 return_ACPI_STATUS (AE_SUPPORT); 475 } 476 477 Info->FieldBitPosition = (UINT32) Position; 478 break; 479 480 case AML_INT_ACCESSFIELD_OP: 481 case AML_INT_EXTACCESSFIELD_OP: 482 /* 483 * Get new AccessType, AccessAttribute, and AccessLength fields 484 * -- to be used for all field units that follow, until the 485 * end-of-field or another AccessAs keyword is encountered. 486 * NOTE. These three bytes are encoded in the integer value 487 * of the parseop for convenience. 488 * 489 * In FieldFlags, preserve the flag bits other than the 490 * ACCESS_TYPE bits. 491 */ 492 493 /* AccessType (ByteAcc, WordAcc, etc.) */ 494 495 Info->FieldFlags = (UINT8) 496 ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | 497 ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07)))); 498 499 /* AccessAttribute (AttribQuick, AttribByte, etc.) */ 500 501 Info->Attribute = (UINT8) 502 ((Arg->Common.Value.Integer >> 8) & 0xFF); 503 504 /* AccessLength (for serial/buffer protocols) */ 505 506 Info->AccessLength = (UINT8) 507 ((Arg->Common.Value.Integer >> 16) & 0xFF); 508 break; 509 510 case AML_INT_CONNECTION_OP: 511 /* 512 * Clear any previous connection. New connection is used for all 513 * fields that follow, similar to AccessAs 514 */ 515 Info->ResourceBuffer = NULL; 516 Info->ConnectionNode = NULL; 517 Info->PinNumberIndex = 0; 518 519 /* 520 * A Connection() is either an actual resource descriptor (buffer) 521 * or a named reference to a resource template 522 */ 523 Child = Arg->Common.Value.Arg; 524 if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP) 525 { 526 Info->ResourceBuffer = Child->Named.Data; 527 Info->ResourceLength = (UINT16) Child->Named.Value.Integer; 528 } 529 else 530 { 531 /* Lookup the Connection() namepath, it should already exist */ 532 533 Status = AcpiNsLookup (WalkState->ScopeInfo, 534 Child->Common.Value.Name, ACPI_TYPE_ANY, 535 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, 536 WalkState, &Info->ConnectionNode); 537 if (ACPI_FAILURE (Status)) 538 { 539 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 540 Child->Common.Value.Name, Status); 541 return_ACPI_STATUS (Status); 542 } 543 } 544 break; 545 546 case AML_INT_NAMEDFIELD_OP: 547 548 /* Lookup the name, it should already exist */ 549 550 Status = AcpiNsLookup (WalkState->ScopeInfo, 551 (char *) &Arg->Named.Name, Info->FieldType, 552 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, 553 WalkState, &Info->FieldNode); 554 if (ACPI_FAILURE (Status)) 555 { 556 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 557 (char *) &Arg->Named.Name, Status); 558 return_ACPI_STATUS (Status); 559 } 560 else 561 { 562 Arg->Common.Node = Info->FieldNode; 563 Info->FieldBitLength = Arg->Common.Value.Size; 564 565 /* 566 * If there is no object attached to the node, this node was 567 * just created and we need to create the field object. 568 * Otherwise, this was a lookup of an existing node and we 569 * don't want to create the field object again. 570 */ 571 if (!AcpiNsGetAttachedObject (Info->FieldNode)) 572 { 573 Status = AcpiExPrepFieldValue (Info); 574 if (ACPI_FAILURE (Status)) 575 { 576 return_ACPI_STATUS (Status); 577 } 578 #ifdef ACPI_EXEC_APP 579 NamePath = AcpiNsGetExternalPathname (Info->FieldNode); 580 ObjDesc = AcpiUtCreateIntegerObject (Value); 581 if (ACPI_SUCCESS (AeLookupInitFileEntry (NamePath, &Value))) 582 { 583 AcpiExWriteDataToField (ObjDesc, 584 AcpiNsGetAttachedObject (Info->FieldNode), 585 &ResultDesc); 586 } 587 AcpiUtRemoveReference (ObjDesc); 588 ACPI_FREE (NamePath); 589 #endif 590 } 591 } 592 593 /* Keep track of bit position for the next field */ 594 595 Position = (UINT64) Info->FieldBitPosition + 596 (UINT64) Arg->Common.Value.Size; 597 598 if (Position > ACPI_UINT32_MAX) 599 { 600 ACPI_ERROR ((AE_INFO, 601 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", 602 ACPI_CAST_PTR (char, &Info->FieldNode->Name))); 603 return_ACPI_STATUS (AE_SUPPORT); 604 } 605 606 Info->FieldBitPosition += Info->FieldBitLength; 607 Info->PinNumberIndex++; /* Index relative to previous Connection() */ 608 break; 609 610 default: 611 612 ACPI_ERROR ((AE_INFO, 613 "Invalid opcode in field list: 0x%X", 614 Arg->Common.AmlOpcode)); 615 return_ACPI_STATUS (AE_AML_BAD_OPCODE); 616 } 617 618 Arg = Arg->Common.Next; 619 } 620 621 return_ACPI_STATUS (AE_OK); 622 } 623 624 625 /******************************************************************************* 626 * 627 * FUNCTION: AcpiDsCreateField 628 * 629 * PARAMETERS: Op - Op containing the Field definition and args 630 * RegionNode - Object for the containing Operation Region 631 * ` WalkState - Current method state 632 * 633 * RETURN: Status 634 * 635 * DESCRIPTION: Create a new field in the specified operation region 636 * 637 ******************************************************************************/ 638 639 ACPI_STATUS 640 AcpiDsCreateField ( 641 ACPI_PARSE_OBJECT *Op, 642 ACPI_NAMESPACE_NODE *RegionNode, 643 ACPI_WALK_STATE *WalkState) 644 { 645 ACPI_STATUS Status; 646 ACPI_PARSE_OBJECT *Arg; 647 ACPI_CREATE_FIELD_INFO Info; 648 649 650 ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op); 651 652 653 /* First arg is the name of the parent OpRegion (must already exist) */ 654 655 Arg = Op->Common.Value.Arg; 656 657 if (!RegionNode) 658 { 659 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 660 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 661 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 662 #ifdef ACPI_ASL_COMPILER 663 Status = AcpiDsCreateExternalRegion (Status, Arg, 664 Arg->Common.Value.Name, WalkState, &RegionNode); 665 #endif 666 if (ACPI_FAILURE (Status)) 667 { 668 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 669 Arg->Common.Value.Name, Status); 670 return_ACPI_STATUS (Status); 671 } 672 } 673 674 memset (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO)); 675 676 /* Second arg is the field flags */ 677 678 Arg = Arg->Common.Next; 679 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 680 Info.Attribute = 0; 681 682 /* Each remaining arg is a Named Field */ 683 684 Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD; 685 Info.RegionNode = RegionNode; 686 687 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 688 if (Info.RegionNode->Type == ACPI_ADR_SPACE_PLATFORM_COMM && 689 !(RegionNode->Object->Field.InternalPccBuffer 690 = ACPI_ALLOCATE_ZEROED(Info.RegionNode->Object->Region.Length))) 691 { 692 return_ACPI_STATUS (AE_NO_MEMORY); 693 } 694 return_ACPI_STATUS (Status); 695 } 696 697 698 /******************************************************************************* 699 * 700 * FUNCTION: AcpiDsInitFieldObjects 701 * 702 * PARAMETERS: Op - Op containing the Field definition and args 703 * ` WalkState - Current method state 704 * 705 * RETURN: Status 706 * 707 * DESCRIPTION: For each "Field Unit" name in the argument list that is 708 * part of the field declaration, enter the name into the 709 * namespace. 710 * 711 ******************************************************************************/ 712 713 ACPI_STATUS 714 AcpiDsInitFieldObjects ( 715 ACPI_PARSE_OBJECT *Op, 716 ACPI_WALK_STATE *WalkState) 717 { 718 ACPI_STATUS Status; 719 ACPI_PARSE_OBJECT *Arg = NULL; 720 ACPI_NAMESPACE_NODE *Node; 721 UINT8 Type = 0; 722 UINT32 Flags; 723 724 725 ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op); 726 727 728 /* Execute flag should always be set when this function is entered */ 729 730 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) 731 { 732 if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP) 733 { 734 /* BankField Op is deferred, just return OK */ 735 736 return_ACPI_STATUS (AE_OK); 737 } 738 739 ACPI_ERROR ((AE_INFO, 740 "Parse deferred mode is not set")); 741 return_ACPI_STATUS (AE_AML_INTERNAL); 742 } 743 744 /* 745 * Get the FieldList argument for this opcode. This is the start of the 746 * list of field elements. 747 */ 748 switch (WalkState->Opcode) 749 { 750 case AML_FIELD_OP: 751 752 Arg = AcpiPsGetArg (Op, 2); 753 Type = ACPI_TYPE_LOCAL_REGION_FIELD; 754 break; 755 756 case AML_BANK_FIELD_OP: 757 758 Arg = AcpiPsGetArg (Op, 4); 759 Type = ACPI_TYPE_LOCAL_BANK_FIELD; 760 break; 761 762 case AML_INDEX_FIELD_OP: 763 764 Arg = AcpiPsGetArg (Op, 3); 765 Type = ACPI_TYPE_LOCAL_INDEX_FIELD; 766 break; 767 768 default: 769 770 return_ACPI_STATUS (AE_BAD_PARAMETER); 771 } 772 773 /* Creating new namespace node(s), should not already exist */ 774 775 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 776 ACPI_NS_ERROR_IF_FOUND; 777 778 /* 779 * Mark node(s) temporary if we are executing a normal control 780 * method. (Don't mark if this is a module-level code method) 781 */ 782 if (WalkState->MethodNode && 783 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) 784 { 785 Flags |= ACPI_NS_TEMPORARY; 786 } 787 788 #ifdef ACPI_EXEC_APP 789 Flags |= ACPI_NS_OVERRIDE_IF_FOUND; 790 #endif 791 /* 792 * Walk the list of entries in the FieldList 793 * Note: FieldList can be of zero length. In this case, Arg will be NULL. 794 */ 795 while (Arg) 796 { 797 /* 798 * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested 799 * in the field names in order to enter them into the namespace. 800 */ 801 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP) 802 { 803 Status = AcpiNsLookup (WalkState->ScopeInfo, 804 (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1, 805 Flags, WalkState, &Node); 806 if (ACPI_FAILURE (Status)) 807 { 808 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 809 (char *) &Arg->Named.Name, Status); 810 if (Status != AE_ALREADY_EXISTS) 811 { 812 return_ACPI_STATUS (Status); 813 } 814 815 /* Name already exists, just ignore this error */ 816 817 Status = AE_OK; 818 } 819 820 Arg->Common.Node = Node; 821 } 822 823 /* Get the next field element in the list */ 824 825 Arg = Arg->Common.Next; 826 } 827 828 return_ACPI_STATUS (AE_OK); 829 } 830 831 832 /******************************************************************************* 833 * 834 * FUNCTION: AcpiDsCreateBankField 835 * 836 * PARAMETERS: Op - Op containing the Field definition and args 837 * RegionNode - Object for the containing Operation Region 838 * WalkState - Current method state 839 * 840 * RETURN: Status 841 * 842 * DESCRIPTION: Create a new bank field in the specified operation region 843 * 844 ******************************************************************************/ 845 846 ACPI_STATUS 847 AcpiDsCreateBankField ( 848 ACPI_PARSE_OBJECT *Op, 849 ACPI_NAMESPACE_NODE *RegionNode, 850 ACPI_WALK_STATE *WalkState) 851 { 852 ACPI_STATUS Status; 853 ACPI_PARSE_OBJECT *Arg; 854 ACPI_CREATE_FIELD_INFO Info; 855 856 857 ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op); 858 859 860 /* First arg is the name of the parent OpRegion (must already exist) */ 861 862 Arg = Op->Common.Value.Arg; 863 if (!RegionNode) 864 { 865 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 866 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 867 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 868 #ifdef ACPI_ASL_COMPILER 869 Status = AcpiDsCreateExternalRegion (Status, Arg, 870 Arg->Common.Value.Name, WalkState, &RegionNode); 871 #endif 872 if (ACPI_FAILURE (Status)) 873 { 874 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 875 Arg->Common.Value.Name, Status); 876 return_ACPI_STATUS (Status); 877 } 878 } 879 880 /* Second arg is the Bank Register (Field) (must already exist) */ 881 882 Arg = Arg->Common.Next; 883 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 884 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 885 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 886 if (ACPI_FAILURE (Status)) 887 { 888 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 889 Arg->Common.Value.String, Status); 890 return_ACPI_STATUS (Status); 891 } 892 893 /* 894 * Third arg is the BankValue 895 * This arg is a TermArg, not a constant 896 * It will be evaluated later, by AcpiDsEvalBankFieldOperands 897 */ 898 Arg = Arg->Common.Next; 899 900 /* Fourth arg is the field flags */ 901 902 Arg = Arg->Common.Next; 903 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 904 905 /* Each remaining arg is a Named Field */ 906 907 Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD; 908 Info.RegionNode = RegionNode; 909 910 /* 911 * Use Info.DataRegisterNode to store BankField Op 912 * It's safe because DataRegisterNode will never be used when create 913 * bank field \we store AmlStart and AmlLength in the BankField Op for 914 * late evaluation. Used in AcpiExPrepFieldValue(Info) 915 * 916 * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like 917 * "void *ParentOp"? 918 */ 919 Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op; 920 921 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 922 return_ACPI_STATUS (Status); 923 } 924 925 926 /******************************************************************************* 927 * 928 * FUNCTION: AcpiDsCreateIndexField 929 * 930 * PARAMETERS: Op - Op containing the Field definition and args 931 * RegionNode - Object for the containing Operation Region 932 * ` WalkState - Current method state 933 * 934 * RETURN: Status 935 * 936 * DESCRIPTION: Create a new index field in the specified operation region 937 * 938 ******************************************************************************/ 939 940 ACPI_STATUS 941 AcpiDsCreateIndexField ( 942 ACPI_PARSE_OBJECT *Op, 943 ACPI_NAMESPACE_NODE *RegionNode, 944 ACPI_WALK_STATE *WalkState) 945 { 946 ACPI_STATUS Status; 947 ACPI_PARSE_OBJECT *Arg; 948 ACPI_CREATE_FIELD_INFO Info; 949 950 951 ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op); 952 953 954 /* First arg is the name of the Index register (must already exist) */ 955 956 Arg = Op->Common.Value.Arg; 957 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 958 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 959 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 960 if (ACPI_FAILURE (Status)) 961 { 962 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 963 Arg->Common.Value.String, Status); 964 return_ACPI_STATUS (Status); 965 } 966 967 /* Second arg is the data register (must already exist) */ 968 969 Arg = Arg->Common.Next; 970 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 971 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 972 ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode); 973 if (ACPI_FAILURE (Status)) 974 { 975 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 976 Arg->Common.Value.String, Status); 977 return_ACPI_STATUS (Status); 978 } 979 980 /* Next arg is the field flags */ 981 982 Arg = Arg->Common.Next; 983 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 984 985 /* Each remaining arg is a Named Field */ 986 987 Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD; 988 Info.RegionNode = RegionNode; 989 990 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 991 return_ACPI_STATUS (Status); 992 } 993