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 - 2017, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include <contrib/dev/acpica/include/acpi.h> 153 #include <contrib/dev/acpica/include/accommon.h> 154 #include <contrib/dev/acpica/include/amlcode.h> 155 #include <contrib/dev/acpica/include/acdispat.h> 156 #include <contrib/dev/acpica/include/acinterp.h> 157 #include <contrib/dev/acpica/include/acnamesp.h> 158 #include <contrib/dev/acpica/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 <contrib/dev/acpica/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 return_ACPI_STATUS (AE_AML_INTERNAL); 317 } 318 319 /* Creating new namespace node, should not already exist */ 320 321 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 322 ACPI_NS_ERROR_IF_FOUND; 323 324 /* 325 * Mark node temporary if we are executing a normal control 326 * method. (Don't mark if this is a module-level code method) 327 */ 328 if (WalkState->MethodNode && 329 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) 330 { 331 Flags |= ACPI_NS_TEMPORARY; 332 } 333 334 /* Enter the NameString into the namespace */ 335 336 Status = AcpiNsLookup (WalkState->ScopeInfo, 337 Arg->Common.Value.String, ACPI_TYPE_ANY, 338 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node); 339 if (ACPI_FAILURE (Status)) 340 { 341 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 342 return_ACPI_STATUS (Status); 343 } 344 } 345 346 /* 347 * We could put the returned object (Node) on the object stack for later, 348 * but for now, we will put it in the "op" object that the parser uses, 349 * so we can get it again at the end of this scope. 350 */ 351 Op->Common.Node = Node; 352 353 /* 354 * If there is no object attached to the node, this node was just created 355 * and we need to create the field object. Otherwise, this was a lookup 356 * of an existing node and we don't want to create the field object again. 357 */ 358 ObjDesc = AcpiNsGetAttachedObject (Node); 359 if (ObjDesc) 360 { 361 return_ACPI_STATUS (AE_OK); 362 } 363 364 /* 365 * The Field definition is not fully parsed at this time. 366 * (We must save the address of the AML for the buffer and index operands) 367 */ 368 369 /* Create the buffer field object */ 370 371 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD); 372 if (!ObjDesc) 373 { 374 Status = AE_NO_MEMORY; 375 goto Cleanup; 376 } 377 378 /* 379 * Remember location in AML stream of the field unit opcode and operands 380 * -- since the buffer and index operands must be evaluated. 381 */ 382 SecondDesc = ObjDesc->Common.NextObject; 383 SecondDesc->Extra.AmlStart = Op->Named.Data; 384 SecondDesc->Extra.AmlLength = Op->Named.Length; 385 ObjDesc->BufferField.Node = Node; 386 387 /* Attach constructed field descriptors to parent node */ 388 389 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD); 390 if (ACPI_FAILURE (Status)) 391 { 392 goto Cleanup; 393 } 394 395 396 Cleanup: 397 398 /* Remove local reference to the object */ 399 400 AcpiUtRemoveReference (ObjDesc); 401 return_ACPI_STATUS (Status); 402 } 403 404 405 /******************************************************************************* 406 * 407 * FUNCTION: AcpiDsGetFieldNames 408 * 409 * PARAMETERS: Info - CreateField info structure 410 * ` WalkState - Current method state 411 * Arg - First parser arg for the field name list 412 * 413 * RETURN: Status 414 * 415 * DESCRIPTION: Process all named fields in a field declaration. Names are 416 * entered into the namespace. 417 * 418 ******************************************************************************/ 419 420 static ACPI_STATUS 421 AcpiDsGetFieldNames ( 422 ACPI_CREATE_FIELD_INFO *Info, 423 ACPI_WALK_STATE *WalkState, 424 ACPI_PARSE_OBJECT *Arg) 425 { 426 ACPI_STATUS Status; 427 UINT64 Position; 428 ACPI_PARSE_OBJECT *Child; 429 430 431 ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info); 432 433 434 /* First field starts at bit zero */ 435 436 Info->FieldBitPosition = 0; 437 438 /* Process all elements in the field list (of parse nodes) */ 439 440 while (Arg) 441 { 442 /* 443 * Four types of field elements are handled: 444 * 1) Name - Enters a new named field into the namespace 445 * 2) Offset - specifies a bit offset 446 * 3) AccessAs - changes the access mode/attributes 447 * 4) Connection - Associate a resource template with the field 448 */ 449 switch (Arg->Common.AmlOpcode) 450 { 451 case AML_INT_RESERVEDFIELD_OP: 452 453 Position = (UINT64) Info->FieldBitPosition + 454 (UINT64) Arg->Common.Value.Size; 455 456 if (Position > ACPI_UINT32_MAX) 457 { 458 ACPI_ERROR ((AE_INFO, 459 "Bit offset within field too large (> 0xFFFFFFFF)")); 460 return_ACPI_STATUS (AE_SUPPORT); 461 } 462 463 Info->FieldBitPosition = (UINT32) Position; 464 break; 465 466 case AML_INT_ACCESSFIELD_OP: 467 case AML_INT_EXTACCESSFIELD_OP: 468 /* 469 * Get new AccessType, AccessAttribute, and AccessLength fields 470 * -- to be used for all field units that follow, until the 471 * end-of-field or another AccessAs keyword is encountered. 472 * NOTE. These three bytes are encoded in the integer value 473 * of the parseop for convenience. 474 * 475 * In FieldFlags, preserve the flag bits other than the 476 * ACCESS_TYPE bits. 477 */ 478 479 /* AccessType (ByteAcc, WordAcc, etc.) */ 480 481 Info->FieldFlags = (UINT8) 482 ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | 483 ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07)))); 484 485 /* AccessAttribute (AttribQuick, AttribByte, etc.) */ 486 487 Info->Attribute = (UINT8) 488 ((Arg->Common.Value.Integer >> 8) & 0xFF); 489 490 /* AccessLength (for serial/buffer protocols) */ 491 492 Info->AccessLength = (UINT8) 493 ((Arg->Common.Value.Integer >> 16) & 0xFF); 494 break; 495 496 case AML_INT_CONNECTION_OP: 497 /* 498 * Clear any previous connection. New connection is used for all 499 * fields that follow, similar to AccessAs 500 */ 501 Info->ResourceBuffer = NULL; 502 Info->ConnectionNode = NULL; 503 Info->PinNumberIndex = 0; 504 505 /* 506 * A Connection() is either an actual resource descriptor (buffer) 507 * or a named reference to a resource template 508 */ 509 Child = Arg->Common.Value.Arg; 510 if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP) 511 { 512 Info->ResourceBuffer = Child->Named.Data; 513 Info->ResourceLength = (UINT16) Child->Named.Value.Integer; 514 } 515 else 516 { 517 /* Lookup the Connection() namepath, it should already exist */ 518 519 Status = AcpiNsLookup (WalkState->ScopeInfo, 520 Child->Common.Value.Name, ACPI_TYPE_ANY, 521 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, 522 WalkState, &Info->ConnectionNode); 523 if (ACPI_FAILURE (Status)) 524 { 525 ACPI_ERROR_NAMESPACE (Child->Common.Value.Name, Status); 526 return_ACPI_STATUS (Status); 527 } 528 } 529 break; 530 531 case AML_INT_NAMEDFIELD_OP: 532 533 /* Lookup the name, it should already exist */ 534 535 Status = AcpiNsLookup (WalkState->ScopeInfo, 536 (char *) &Arg->Named.Name, Info->FieldType, 537 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, 538 WalkState, &Info->FieldNode); 539 if (ACPI_FAILURE (Status)) 540 { 541 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status); 542 return_ACPI_STATUS (Status); 543 } 544 else 545 { 546 Arg->Common.Node = Info->FieldNode; 547 Info->FieldBitLength = Arg->Common.Value.Size; 548 549 /* 550 * If there is no object attached to the node, this node was 551 * just created and we need to create the field object. 552 * Otherwise, this was a lookup of an existing node and we 553 * don't want to create the field object again. 554 */ 555 if (!AcpiNsGetAttachedObject (Info->FieldNode)) 556 { 557 Status = AcpiExPrepFieldValue (Info); 558 if (ACPI_FAILURE (Status)) 559 { 560 return_ACPI_STATUS (Status); 561 } 562 } 563 } 564 565 /* Keep track of bit position for the next field */ 566 567 Position = (UINT64) Info->FieldBitPosition + 568 (UINT64) Arg->Common.Value.Size; 569 570 if (Position > ACPI_UINT32_MAX) 571 { 572 ACPI_ERROR ((AE_INFO, 573 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", 574 ACPI_CAST_PTR (char, &Info->FieldNode->Name))); 575 return_ACPI_STATUS (AE_SUPPORT); 576 } 577 578 Info->FieldBitPosition += Info->FieldBitLength; 579 Info->PinNumberIndex++; /* Index relative to previous Connection() */ 580 break; 581 582 default: 583 584 ACPI_ERROR ((AE_INFO, 585 "Invalid opcode in field list: 0x%X", 586 Arg->Common.AmlOpcode)); 587 return_ACPI_STATUS (AE_AML_BAD_OPCODE); 588 } 589 590 Arg = Arg->Common.Next; 591 } 592 593 return_ACPI_STATUS (AE_OK); 594 } 595 596 597 /******************************************************************************* 598 * 599 * FUNCTION: AcpiDsCreateField 600 * 601 * PARAMETERS: Op - Op containing the Field definition and args 602 * RegionNode - Object for the containing Operation Region 603 * ` WalkState - Current method state 604 * 605 * RETURN: Status 606 * 607 * DESCRIPTION: Create a new field in the specified operation region 608 * 609 ******************************************************************************/ 610 611 ACPI_STATUS 612 AcpiDsCreateField ( 613 ACPI_PARSE_OBJECT *Op, 614 ACPI_NAMESPACE_NODE *RegionNode, 615 ACPI_WALK_STATE *WalkState) 616 { 617 ACPI_STATUS Status; 618 ACPI_PARSE_OBJECT *Arg; 619 ACPI_CREATE_FIELD_INFO Info; 620 621 622 ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op); 623 624 625 /* First arg is the name of the parent OpRegion (must already exist) */ 626 627 Arg = Op->Common.Value.Arg; 628 629 if (!RegionNode) 630 { 631 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 632 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 633 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 634 #ifdef ACPI_ASL_COMPILER 635 Status = AcpiDsCreateExternalRegion (Status, Arg, 636 Arg->Common.Value.Name, WalkState, &RegionNode); 637 #endif 638 if (ACPI_FAILURE (Status)) 639 { 640 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status); 641 return_ACPI_STATUS (Status); 642 } 643 } 644 645 memset (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO)); 646 647 /* Second arg is the field flags */ 648 649 Arg = Arg->Common.Next; 650 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 651 Info.Attribute = 0; 652 653 /* Each remaining arg is a Named Field */ 654 655 Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD; 656 Info.RegionNode = RegionNode; 657 658 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 659 return_ACPI_STATUS (Status); 660 } 661 662 663 /******************************************************************************* 664 * 665 * FUNCTION: AcpiDsInitFieldObjects 666 * 667 * PARAMETERS: Op - Op containing the Field definition and args 668 * ` WalkState - Current method state 669 * 670 * RETURN: Status 671 * 672 * DESCRIPTION: For each "Field Unit" name in the argument list that is 673 * part of the field declaration, enter the name into the 674 * namespace. 675 * 676 ******************************************************************************/ 677 678 ACPI_STATUS 679 AcpiDsInitFieldObjects ( 680 ACPI_PARSE_OBJECT *Op, 681 ACPI_WALK_STATE *WalkState) 682 { 683 ACPI_STATUS Status; 684 ACPI_PARSE_OBJECT *Arg = NULL; 685 ACPI_NAMESPACE_NODE *Node; 686 UINT8 Type = 0; 687 UINT32 Flags; 688 689 690 ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op); 691 692 693 /* Execute flag should always be set when this function is entered */ 694 695 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) 696 { 697 if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP) 698 { 699 /* BankField Op is deferred, just return OK */ 700 701 return_ACPI_STATUS (AE_OK); 702 } 703 704 return_ACPI_STATUS (AE_AML_INTERNAL); 705 } 706 707 /* 708 * Get the FieldList argument for this opcode. This is the start of the 709 * list of field elements. 710 */ 711 switch (WalkState->Opcode) 712 { 713 case AML_FIELD_OP: 714 715 Arg = AcpiPsGetArg (Op, 2); 716 Type = ACPI_TYPE_LOCAL_REGION_FIELD; 717 break; 718 719 case AML_BANK_FIELD_OP: 720 721 Arg = AcpiPsGetArg (Op, 4); 722 Type = ACPI_TYPE_LOCAL_BANK_FIELD; 723 break; 724 725 case AML_INDEX_FIELD_OP: 726 727 Arg = AcpiPsGetArg (Op, 3); 728 Type = ACPI_TYPE_LOCAL_INDEX_FIELD; 729 break; 730 731 default: 732 733 return_ACPI_STATUS (AE_BAD_PARAMETER); 734 } 735 736 /* Creating new namespace node(s), should not already exist */ 737 738 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 739 ACPI_NS_ERROR_IF_FOUND; 740 741 /* 742 * Mark node(s) temporary if we are executing a normal control 743 * method. (Don't mark if this is a module-level code method) 744 */ 745 if (WalkState->MethodNode && 746 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) 747 { 748 Flags |= ACPI_NS_TEMPORARY; 749 } 750 751 /* 752 * Walk the list of entries in the FieldList 753 * Note: FieldList can be of zero length. In this case, Arg will be NULL. 754 */ 755 while (Arg) 756 { 757 /* 758 * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested 759 * in the field names in order to enter them into the namespace. 760 */ 761 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP) 762 { 763 Status = AcpiNsLookup (WalkState->ScopeInfo, 764 (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1, 765 Flags, WalkState, &Node); 766 if (ACPI_FAILURE (Status)) 767 { 768 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status); 769 if (Status != AE_ALREADY_EXISTS) 770 { 771 return_ACPI_STATUS (Status); 772 } 773 774 /* Name already exists, just ignore this error */ 775 776 Status = AE_OK; 777 } 778 779 Arg->Common.Node = Node; 780 } 781 782 /* Get the next field element in the list */ 783 784 Arg = Arg->Common.Next; 785 } 786 787 return_ACPI_STATUS (AE_OK); 788 } 789 790 791 /******************************************************************************* 792 * 793 * FUNCTION: AcpiDsCreateBankField 794 * 795 * PARAMETERS: Op - Op containing the Field definition and args 796 * RegionNode - Object for the containing Operation Region 797 * WalkState - Current method state 798 * 799 * RETURN: Status 800 * 801 * DESCRIPTION: Create a new bank field in the specified operation region 802 * 803 ******************************************************************************/ 804 805 ACPI_STATUS 806 AcpiDsCreateBankField ( 807 ACPI_PARSE_OBJECT *Op, 808 ACPI_NAMESPACE_NODE *RegionNode, 809 ACPI_WALK_STATE *WalkState) 810 { 811 ACPI_STATUS Status; 812 ACPI_PARSE_OBJECT *Arg; 813 ACPI_CREATE_FIELD_INFO Info; 814 815 816 ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op); 817 818 819 /* First arg is the name of the parent OpRegion (must already exist) */ 820 821 Arg = Op->Common.Value.Arg; 822 if (!RegionNode) 823 { 824 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 825 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 826 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 827 #ifdef ACPI_ASL_COMPILER 828 Status = AcpiDsCreateExternalRegion (Status, Arg, 829 Arg->Common.Value.Name, WalkState, &RegionNode); 830 #endif 831 if (ACPI_FAILURE (Status)) 832 { 833 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status); 834 return_ACPI_STATUS (Status); 835 } 836 } 837 838 /* Second arg is the Bank Register (Field) (must already exist) */ 839 840 Arg = Arg->Common.Next; 841 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 842 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 843 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 844 if (ACPI_FAILURE (Status)) 845 { 846 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 847 return_ACPI_STATUS (Status); 848 } 849 850 /* 851 * Third arg is the BankValue 852 * This arg is a TermArg, not a constant 853 * It will be evaluated later, by AcpiDsEvalBankFieldOperands 854 */ 855 Arg = Arg->Common.Next; 856 857 /* Fourth arg is the field flags */ 858 859 Arg = Arg->Common.Next; 860 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 861 862 /* Each remaining arg is a Named Field */ 863 864 Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD; 865 Info.RegionNode = RegionNode; 866 867 /* 868 * Use Info.DataRegisterNode to store BankField Op 869 * It's safe because DataRegisterNode will never be used when create 870 * bank field \we store AmlStart and AmlLength in the BankField Op for 871 * late evaluation. Used in AcpiExPrepFieldValue(Info) 872 * 873 * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like 874 * "void *ParentOp"? 875 */ 876 Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op; 877 878 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 879 return_ACPI_STATUS (Status); 880 } 881 882 883 /******************************************************************************* 884 * 885 * FUNCTION: AcpiDsCreateIndexField 886 * 887 * PARAMETERS: Op - Op containing the Field definition and args 888 * RegionNode - Object for the containing Operation Region 889 * ` WalkState - Current method state 890 * 891 * RETURN: Status 892 * 893 * DESCRIPTION: Create a new index field in the specified operation region 894 * 895 ******************************************************************************/ 896 897 ACPI_STATUS 898 AcpiDsCreateIndexField ( 899 ACPI_PARSE_OBJECT *Op, 900 ACPI_NAMESPACE_NODE *RegionNode, 901 ACPI_WALK_STATE *WalkState) 902 { 903 ACPI_STATUS Status; 904 ACPI_PARSE_OBJECT *Arg; 905 ACPI_CREATE_FIELD_INFO Info; 906 907 908 ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op); 909 910 911 /* First arg is the name of the Index register (must already exist) */ 912 913 Arg = Op->Common.Value.Arg; 914 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 915 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 916 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 917 if (ACPI_FAILURE (Status)) 918 { 919 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 920 return_ACPI_STATUS (Status); 921 } 922 923 /* Second arg is the data register (must already exist) */ 924 925 Arg = Arg->Common.Next; 926 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 927 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 928 ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode); 929 if (ACPI_FAILURE (Status)) 930 { 931 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 932 return_ACPI_STATUS (Status); 933 } 934 935 /* Next arg is the field flags */ 936 937 Arg = Arg->Common.Next; 938 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 939 940 /* Each remaining arg is a Named Field */ 941 942 Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD; 943 Info.RegionNode = RegionNode; 944 945 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 946 return_ACPI_STATUS (Status); 947 } 948