| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: dsfield - Dispatcher field routines |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
| 44 | #include "acpi.h" |
| 45 | #include "accommon.h" |
| 46 | #include "amlcode.h" |
| 47 | #include "acdispat.h" |
| 48 | #include "acinterp.h" |
| 49 | #include "acnamesp.h" |
| 50 | #include "acparser.h" |
| 51 | |
| 52 | |
| 53 | #define _COMPONENT ACPI_DISPATCHER |
| 54 | ACPI_MODULE_NAME ("dsfield" ) |
| 55 | |
| 56 | /* Local prototypes */ |
| 57 | |
| 58 | #ifdef ACPI_ASL_COMPILER |
| 59 | #include "acdisasm.h" |
| 60 | |
| 61 | static ACPI_STATUS |
| 62 | AcpiDsCreateExternalRegion ( |
| 63 | ACPI_STATUS LookupStatus, |
| 64 | ACPI_PARSE_OBJECT *Op, |
| 65 | char *Path, |
| 66 | ACPI_WALK_STATE *WalkState, |
| 67 | ACPI_NAMESPACE_NODE **Node); |
| 68 | #endif |
| 69 | |
| 70 | static ACPI_STATUS |
| 71 | AcpiDsGetFieldNames ( |
| 72 | ACPI_CREATE_FIELD_INFO *Info, |
| 73 | ACPI_WALK_STATE *WalkState, |
| 74 | ACPI_PARSE_OBJECT *Arg); |
| 75 | |
| 76 | |
| 77 | #ifdef ACPI_ASL_COMPILER |
| 78 | /******************************************************************************* |
| 79 | * |
| 80 | * FUNCTION: AcpiDsCreateExternalRegion (iASL Disassembler only) |
| 81 | * |
| 82 | * PARAMETERS: LookupStatus - Status from NsLookup operation |
| 83 | * Op - Op containing the Field definition and args |
| 84 | * Path - Pathname of the region |
| 85 | * ` WalkState - Current method state |
| 86 | * Node - Where the new region node is returned |
| 87 | * |
| 88 | * RETURN: Status |
| 89 | * |
| 90 | * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new |
| 91 | * region node/object. |
| 92 | * |
| 93 | ******************************************************************************/ |
| 94 | |
| 95 | static ACPI_STATUS |
| 96 | AcpiDsCreateExternalRegion ( |
| 97 | ACPI_STATUS LookupStatus, |
| 98 | ACPI_PARSE_OBJECT *Op, |
| 99 | char *Path, |
| 100 | ACPI_WALK_STATE *WalkState, |
| 101 | ACPI_NAMESPACE_NODE **Node) |
| 102 | { |
| 103 | ACPI_STATUS Status; |
| 104 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 105 | |
| 106 | |
| 107 | if (LookupStatus != AE_NOT_FOUND) |
| 108 | { |
| 109 | return (LookupStatus); |
| 110 | } |
| 111 | |
| 112 | /* |
| 113 | * Table disassembly: |
| 114 | * OperationRegion not found. Generate an External for it, and |
| 115 | * insert the name into the namespace. |
| 116 | */ |
| 117 | AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_REGION, 0, 0); |
| 118 | |
| 119 | Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_REGION, |
| 120 | ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT, WalkState, Node); |
| 121 | if (ACPI_FAILURE (Status)) |
| 122 | { |
| 123 | return (Status); |
| 124 | } |
| 125 | |
| 126 | /* Must create and install a region object for the new node */ |
| 127 | |
| 128 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION); |
| 129 | if (!ObjDesc) |
| 130 | { |
| 131 | return (AE_NO_MEMORY); |
| 132 | } |
| 133 | |
| 134 | ObjDesc->Region.Node = *Node; |
| 135 | Status = AcpiNsAttachObject (*Node, ObjDesc, ACPI_TYPE_REGION); |
| 136 | return (Status); |
| 137 | } |
| 138 | #endif |
| 139 | |
| 140 | |
| 141 | /******************************************************************************* |
| 142 | * |
| 143 | * FUNCTION: AcpiDsCreateBufferField |
| 144 | * |
| 145 | * PARAMETERS: Op - Current parse op (CreateXXField) |
| 146 | * WalkState - Current state |
| 147 | * |
| 148 | * RETURN: Status |
| 149 | * |
| 150 | * DESCRIPTION: Execute the CreateField operators: |
| 151 | * CreateBitFieldOp, |
| 152 | * CreateByteFieldOp, |
| 153 | * CreateWordFieldOp, |
| 154 | * CreateDwordFieldOp, |
| 155 | * CreateQwordFieldOp, |
| 156 | * CreateFieldOp (all of which define a field in a buffer) |
| 157 | * |
| 158 | ******************************************************************************/ |
| 159 | |
| 160 | ACPI_STATUS |
| 161 | AcpiDsCreateBufferField ( |
| 162 | ACPI_PARSE_OBJECT *Op, |
| 163 | ACPI_WALK_STATE *WalkState) |
| 164 | { |
| 165 | ACPI_PARSE_OBJECT *Arg; |
| 166 | ACPI_NAMESPACE_NODE *Node; |
| 167 | ACPI_STATUS Status; |
| 168 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 169 | ACPI_OPERAND_OBJECT *SecondDesc = NULL; |
| 170 | UINT32 Flags; |
| 171 | |
| 172 | |
| 173 | ACPI_FUNCTION_TRACE (DsCreateBufferField); |
| 174 | |
| 175 | |
| 176 | /* |
| 177 | * Get the NameString argument (name of the new BufferField) |
| 178 | */ |
| 179 | if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP) |
| 180 | { |
| 181 | /* For CreateField, name is the 4th argument */ |
| 182 | |
| 183 | Arg = AcpiPsGetArg (Op, 3); |
| 184 | } |
| 185 | else |
| 186 | { |
| 187 | /* For all other CreateXXXField operators, name is the 3rd argument */ |
| 188 | |
| 189 | Arg = AcpiPsGetArg (Op, 2); |
| 190 | } |
| 191 | |
| 192 | if (!Arg) |
| 193 | { |
| 194 | return_ACPI_STATUS (AE_AML_NO_OPERAND); |
| 195 | } |
| 196 | |
| 197 | if (WalkState->DeferredNode) |
| 198 | { |
| 199 | Node = WalkState->DeferredNode; |
| 200 | Status = AE_OK; |
| 201 | } |
| 202 | else |
| 203 | { |
| 204 | /* Execute flag should always be set when this function is entered */ |
| 205 | |
| 206 | if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) |
| 207 | { |
| 208 | return_ACPI_STATUS (AE_AML_INTERNAL); |
| 209 | } |
| 210 | |
| 211 | /* Creating new namespace node, should not already exist */ |
| 212 | |
| 213 | Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | |
| 214 | ACPI_NS_ERROR_IF_FOUND; |
| 215 | |
| 216 | /* |
| 217 | * Mark node temporary if we are executing a normal control |
| 218 | * method. (Don't mark if this is a module-level code method) |
| 219 | */ |
| 220 | if (WalkState->MethodNode && |
| 221 | !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) |
| 222 | { |
| 223 | Flags |= ACPI_NS_TEMPORARY; |
| 224 | } |
| 225 | |
| 226 | /* Enter the NameString into the namespace */ |
| 227 | |
| 228 | Status = AcpiNsLookup (WalkState->ScopeInfo, |
| 229 | Arg->Common.Value.String, ACPI_TYPE_ANY, |
| 230 | ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node); |
| 231 | if (ACPI_FAILURE (Status)) |
| 232 | { |
| 233 | ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); |
| 234 | return_ACPI_STATUS (Status); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | /* |
| 239 | * We could put the returned object (Node) on the object stack for later, |
| 240 | * but for now, we will put it in the "op" object that the parser uses, |
| 241 | * so we can get it again at the end of this scope. |
| 242 | */ |
| 243 | Op->Common.Node = Node; |
| 244 | |
| 245 | /* |
| 246 | * If there is no object attached to the node, this node was just created |
| 247 | * and we need to create the field object. Otherwise, this was a lookup |
| 248 | * of an existing node and we don't want to create the field object again. |
| 249 | */ |
| 250 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 251 | if (ObjDesc) |
| 252 | { |
| 253 | return_ACPI_STATUS (AE_OK); |
| 254 | } |
| 255 | |
| 256 | /* |
| 257 | * The Field definition is not fully parsed at this time. |
| 258 | * (We must save the address of the AML for the buffer and index operands) |
| 259 | */ |
| 260 | |
| 261 | /* Create the buffer field object */ |
| 262 | |
| 263 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD); |
| 264 | if (!ObjDesc) |
| 265 | { |
| 266 | Status = AE_NO_MEMORY; |
| 267 | goto Cleanup; |
| 268 | } |
| 269 | |
| 270 | /* |
| 271 | * Remember location in AML stream of the field unit opcode and operands |
| 272 | * -- since the buffer and index operands must be evaluated. |
| 273 | */ |
| 274 | SecondDesc = ObjDesc->Common.NextObject; |
| 275 | SecondDesc->Extra.AmlStart = Op->Named.Data; |
| 276 | SecondDesc->Extra.AmlLength = Op->Named.Length; |
| 277 | ObjDesc->BufferField.Node = Node; |
| 278 | |
| 279 | /* Attach constructed field descriptors to parent node */ |
| 280 | |
| 281 | Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD); |
| 282 | if (ACPI_FAILURE (Status)) |
| 283 | { |
| 284 | goto Cleanup; |
| 285 | } |
| 286 | |
| 287 | |
| 288 | Cleanup: |
| 289 | |
| 290 | /* Remove local reference to the object */ |
| 291 | |
| 292 | AcpiUtRemoveReference (ObjDesc); |
| 293 | return_ACPI_STATUS (Status); |
| 294 | } |
| 295 | |
| 296 | |
| 297 | /******************************************************************************* |
| 298 | * |
| 299 | * FUNCTION: AcpiDsGetFieldNames |
| 300 | * |
| 301 | * PARAMETERS: Info - CreateField info structure |
| 302 | * ` WalkState - Current method state |
| 303 | * Arg - First parser arg for the field name list |
| 304 | * |
| 305 | * RETURN: Status |
| 306 | * |
| 307 | * DESCRIPTION: Process all named fields in a field declaration. Names are |
| 308 | * entered into the namespace. |
| 309 | * |
| 310 | ******************************************************************************/ |
| 311 | |
| 312 | static ACPI_STATUS |
| 313 | AcpiDsGetFieldNames ( |
| 314 | ACPI_CREATE_FIELD_INFO *Info, |
| 315 | ACPI_WALK_STATE *WalkState, |
| 316 | ACPI_PARSE_OBJECT *Arg) |
| 317 | { |
| 318 | ACPI_STATUS Status; |
| 319 | UINT64 Position; |
| 320 | ACPI_PARSE_OBJECT *Child; |
| 321 | |
| 322 | |
| 323 | ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info); |
| 324 | |
| 325 | |
| 326 | /* First field starts at bit zero */ |
| 327 | |
| 328 | Info->FieldBitPosition = 0; |
| 329 | |
| 330 | /* Process all elements in the field list (of parse nodes) */ |
| 331 | |
| 332 | while (Arg) |
| 333 | { |
| 334 | /* |
| 335 | * Four types of field elements are handled: |
| 336 | * 1) Name - Enters a new named field into the namespace |
| 337 | * 2) Offset - specifies a bit offset |
| 338 | * 3) AccessAs - changes the access mode/attributes |
| 339 | * 4) Connection - Associate a resource template with the field |
| 340 | */ |
| 341 | switch (Arg->Common.AmlOpcode) |
| 342 | { |
| 343 | case AML_INT_RESERVEDFIELD_OP: |
| 344 | |
| 345 | Position = (UINT64) Info->FieldBitPosition + |
| 346 | (UINT64) Arg->Common.Value.Size; |
| 347 | |
| 348 | if (Position > ACPI_UINT32_MAX) |
| 349 | { |
| 350 | ACPI_ERROR ((AE_INFO, |
| 351 | "Bit offset within field too large (> 0xFFFFFFFF)" )); |
| 352 | return_ACPI_STATUS (AE_SUPPORT); |
| 353 | } |
| 354 | |
| 355 | Info->FieldBitPosition = (UINT32) Position; |
| 356 | break; |
| 357 | |
| 358 | case AML_INT_ACCESSFIELD_OP: |
| 359 | case AML_INT_EXTACCESSFIELD_OP: |
| 360 | /* |
| 361 | * Get new AccessType, AccessAttribute, and AccessLength fields |
| 362 | * -- to be used for all field units that follow, until the |
| 363 | * end-of-field or another AccessAs keyword is encountered. |
| 364 | * NOTE. These three bytes are encoded in the integer value |
| 365 | * of the parseop for convenience. |
| 366 | * |
| 367 | * In FieldFlags, preserve the flag bits other than the |
| 368 | * ACCESS_TYPE bits. |
| 369 | */ |
| 370 | |
| 371 | /* AccessType (ByteAcc, WordAcc, etc.) */ |
| 372 | |
| 373 | Info->FieldFlags = (UINT8) |
| 374 | ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | |
| 375 | ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07)))); |
| 376 | |
| 377 | /* AccessAttribute (AttribQuick, AttribByte, etc.) */ |
| 378 | |
| 379 | Info->Attribute = (UINT8) |
| 380 | ((Arg->Common.Value.Integer >> 8) & 0xFF); |
| 381 | |
| 382 | /* AccessLength (for serial/buffer protocols) */ |
| 383 | |
| 384 | Info->AccessLength = (UINT8) |
| 385 | ((Arg->Common.Value.Integer >> 16) & 0xFF); |
| 386 | break; |
| 387 | |
| 388 | case AML_INT_CONNECTION_OP: |
| 389 | /* |
| 390 | * Clear any previous connection. New connection is used for all |
| 391 | * fields that follow, similar to AccessAs |
| 392 | */ |
| 393 | Info->ResourceBuffer = NULL; |
| 394 | Info->ConnectionNode = NULL; |
| 395 | Info->PinNumberIndex = 0; |
| 396 | |
| 397 | /* |
| 398 | * A Connection() is either an actual resource descriptor (buffer) |
| 399 | * or a named reference to a resource template |
| 400 | */ |
| 401 | Child = Arg->Common.Value.Arg; |
| 402 | if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP) |
| 403 | { |
| 404 | Info->ResourceBuffer = Child->Named.Data; |
| 405 | Info->ResourceLength = (UINT16) Child->Named.Value.Integer; |
| 406 | } |
| 407 | else |
| 408 | { |
| 409 | /* Lookup the Connection() namepath, it should already exist */ |
| 410 | |
| 411 | Status = AcpiNsLookup (WalkState->ScopeInfo, |
| 412 | Child->Common.Value.Name, ACPI_TYPE_ANY, |
| 413 | ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, |
| 414 | WalkState, &Info->ConnectionNode); |
| 415 | if (ACPI_FAILURE (Status)) |
| 416 | { |
| 417 | ACPI_ERROR_NAMESPACE (Child->Common.Value.Name, Status); |
| 418 | return_ACPI_STATUS (Status); |
| 419 | } |
| 420 | } |
| 421 | break; |
| 422 | |
| 423 | case AML_INT_NAMEDFIELD_OP: |
| 424 | |
| 425 | /* Lookup the name, it should already exist */ |
| 426 | |
| 427 | Status = AcpiNsLookup (WalkState->ScopeInfo, |
| 428 | (char *) &Arg->Named.Name, Info->FieldType, |
| 429 | ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, |
| 430 | WalkState, &Info->FieldNode); |
| 431 | if (ACPI_FAILURE (Status)) |
| 432 | { |
| 433 | ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status); |
| 434 | return_ACPI_STATUS (Status); |
| 435 | } |
| 436 | else |
| 437 | { |
| 438 | Arg->Common.Node = Info->FieldNode; |
| 439 | Info->FieldBitLength = Arg->Common.Value.Size; |
| 440 | |
| 441 | /* |
| 442 | * If there is no object attached to the node, this node was |
| 443 | * just created and we need to create the field object. |
| 444 | * Otherwise, this was a lookup of an existing node and we |
| 445 | * don't want to create the field object again. |
| 446 | */ |
| 447 | if (!AcpiNsGetAttachedObject (Info->FieldNode)) |
| 448 | { |
| 449 | Status = AcpiExPrepFieldValue (Info); |
| 450 | if (ACPI_FAILURE (Status)) |
| 451 | { |
| 452 | return_ACPI_STATUS (Status); |
| 453 | } |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | /* Keep track of bit position for the next field */ |
| 458 | |
| 459 | Position = (UINT64) Info->FieldBitPosition + |
| 460 | (UINT64) Arg->Common.Value.Size; |
| 461 | |
| 462 | if (Position > ACPI_UINT32_MAX) |
| 463 | { |
| 464 | ACPI_ERROR ((AE_INFO, |
| 465 | "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)" , |
| 466 | ACPI_CAST_PTR (char, &Info->FieldNode->Name))); |
| 467 | return_ACPI_STATUS (AE_SUPPORT); |
| 468 | } |
| 469 | |
| 470 | Info->FieldBitPosition += Info->FieldBitLength; |
| 471 | Info->PinNumberIndex++; /* Index relative to previous Connection() */ |
| 472 | break; |
| 473 | |
| 474 | default: |
| 475 | |
| 476 | ACPI_ERROR ((AE_INFO, |
| 477 | "Invalid opcode in field list: 0x%X" , |
| 478 | Arg->Common.AmlOpcode)); |
| 479 | return_ACPI_STATUS (AE_AML_BAD_OPCODE); |
| 480 | } |
| 481 | |
| 482 | Arg = Arg->Common.Next; |
| 483 | } |
| 484 | |
| 485 | return_ACPI_STATUS (AE_OK); |
| 486 | } |
| 487 | |
| 488 | |
| 489 | /******************************************************************************* |
| 490 | * |
| 491 | * FUNCTION: AcpiDsCreateField |
| 492 | * |
| 493 | * PARAMETERS: Op - Op containing the Field definition and args |
| 494 | * RegionNode - Object for the containing Operation Region |
| 495 | * ` WalkState - Current method state |
| 496 | * |
| 497 | * RETURN: Status |
| 498 | * |
| 499 | * DESCRIPTION: Create a new field in the specified operation region |
| 500 | * |
| 501 | ******************************************************************************/ |
| 502 | |
| 503 | ACPI_STATUS |
| 504 | AcpiDsCreateField ( |
| 505 | ACPI_PARSE_OBJECT *Op, |
| 506 | ACPI_NAMESPACE_NODE *RegionNode, |
| 507 | ACPI_WALK_STATE *WalkState) |
| 508 | { |
| 509 | ACPI_STATUS Status; |
| 510 | ACPI_PARSE_OBJECT *Arg; |
| 511 | ACPI_CREATE_FIELD_INFO Info; |
| 512 | |
| 513 | |
| 514 | ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op); |
| 515 | |
| 516 | |
| 517 | /* First arg is the name of the parent OpRegion (must already exist) */ |
| 518 | |
| 519 | Arg = Op->Common.Value.Arg; |
| 520 | |
| 521 | if (!RegionNode) |
| 522 | { |
| 523 | Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, |
| 524 | ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, |
| 525 | ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); |
| 526 | #ifdef ACPI_ASL_COMPILER |
| 527 | Status = AcpiDsCreateExternalRegion (Status, Arg, |
| 528 | Arg->Common.Value.Name, WalkState, &RegionNode); |
| 529 | #endif |
| 530 | if (ACPI_FAILURE (Status)) |
| 531 | { |
| 532 | ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status); |
| 533 | return_ACPI_STATUS (Status); |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | memset (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO)); |
| 538 | |
| 539 | /* Second arg is the field flags */ |
| 540 | |
| 541 | Arg = Arg->Common.Next; |
| 542 | Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; |
| 543 | Info.Attribute = 0; |
| 544 | |
| 545 | /* Each remaining arg is a Named Field */ |
| 546 | |
| 547 | Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD; |
| 548 | Info.RegionNode = RegionNode; |
| 549 | |
| 550 | Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); |
| 551 | return_ACPI_STATUS (Status); |
| 552 | } |
| 553 | |
| 554 | |
| 555 | /******************************************************************************* |
| 556 | * |
| 557 | * FUNCTION: AcpiDsInitFieldObjects |
| 558 | * |
| 559 | * PARAMETERS: Op - Op containing the Field definition and args |
| 560 | * ` WalkState - Current method state |
| 561 | * |
| 562 | * RETURN: Status |
| 563 | * |
| 564 | * DESCRIPTION: For each "Field Unit" name in the argument list that is |
| 565 | * part of the field declaration, enter the name into the |
| 566 | * namespace. |
| 567 | * |
| 568 | ******************************************************************************/ |
| 569 | |
| 570 | ACPI_STATUS |
| 571 | AcpiDsInitFieldObjects ( |
| 572 | ACPI_PARSE_OBJECT *Op, |
| 573 | ACPI_WALK_STATE *WalkState) |
| 574 | { |
| 575 | ACPI_STATUS Status; |
| 576 | ACPI_PARSE_OBJECT *Arg = NULL; |
| 577 | ACPI_NAMESPACE_NODE *Node; |
| 578 | UINT8 Type = 0; |
| 579 | UINT32 Flags; |
| 580 | |
| 581 | |
| 582 | ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op); |
| 583 | |
| 584 | |
| 585 | /* Execute flag should always be set when this function is entered */ |
| 586 | |
| 587 | if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) |
| 588 | { |
| 589 | if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP) |
| 590 | { |
| 591 | /* BankField Op is deferred, just return OK */ |
| 592 | |
| 593 | return_ACPI_STATUS (AE_OK); |
| 594 | } |
| 595 | |
| 596 | return_ACPI_STATUS (AE_AML_INTERNAL); |
| 597 | } |
| 598 | |
| 599 | /* |
| 600 | * Get the FieldList argument for this opcode. This is the start of the |
| 601 | * list of field elements. |
| 602 | */ |
| 603 | switch (WalkState->Opcode) |
| 604 | { |
| 605 | case AML_FIELD_OP: |
| 606 | |
| 607 | Arg = AcpiPsGetArg (Op, 2); |
| 608 | Type = ACPI_TYPE_LOCAL_REGION_FIELD; |
| 609 | break; |
| 610 | |
| 611 | case AML_BANK_FIELD_OP: |
| 612 | |
| 613 | Arg = AcpiPsGetArg (Op, 4); |
| 614 | Type = ACPI_TYPE_LOCAL_BANK_FIELD; |
| 615 | break; |
| 616 | |
| 617 | case AML_INDEX_FIELD_OP: |
| 618 | |
| 619 | Arg = AcpiPsGetArg (Op, 3); |
| 620 | Type = ACPI_TYPE_LOCAL_INDEX_FIELD; |
| 621 | break; |
| 622 | |
| 623 | default: |
| 624 | |
| 625 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 626 | } |
| 627 | |
| 628 | /* Creating new namespace node(s), should not already exist */ |
| 629 | |
| 630 | Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | |
| 631 | ACPI_NS_ERROR_IF_FOUND; |
| 632 | |
| 633 | /* |
| 634 | * Mark node(s) temporary if we are executing a normal control |
| 635 | * method. (Don't mark if this is a module-level code method) |
| 636 | */ |
| 637 | if (WalkState->MethodNode && |
| 638 | !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) |
| 639 | { |
| 640 | Flags |= ACPI_NS_TEMPORARY; |
| 641 | } |
| 642 | |
| 643 | /* |
| 644 | * Walk the list of entries in the FieldList |
| 645 | * Note: FieldList can be of zero length. In this case, Arg will be NULL. |
| 646 | */ |
| 647 | while (Arg) |
| 648 | { |
| 649 | /* |
| 650 | * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested |
| 651 | * in the field names in order to enter them into the namespace. |
| 652 | */ |
| 653 | if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP) |
| 654 | { |
| 655 | Status = AcpiNsLookup (WalkState->ScopeInfo, |
| 656 | (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1, |
| 657 | Flags, WalkState, &Node); |
| 658 | if (ACPI_FAILURE (Status)) |
| 659 | { |
| 660 | ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status); |
| 661 | if (Status != AE_ALREADY_EXISTS) |
| 662 | { |
| 663 | return_ACPI_STATUS (Status); |
| 664 | } |
| 665 | |
| 666 | /* Name already exists, just ignore this error */ |
| 667 | |
| 668 | Status = AE_OK; |
| 669 | } |
| 670 | |
| 671 | Arg->Common.Node = Node; |
| 672 | } |
| 673 | |
| 674 | /* Get the next field element in the list */ |
| 675 | |
| 676 | Arg = Arg->Common.Next; |
| 677 | } |
| 678 | |
| 679 | return_ACPI_STATUS (AE_OK); |
| 680 | } |
| 681 | |
| 682 | |
| 683 | /******************************************************************************* |
| 684 | * |
| 685 | * FUNCTION: AcpiDsCreateBankField |
| 686 | * |
| 687 | * PARAMETERS: Op - Op containing the Field definition and args |
| 688 | * RegionNode - Object for the containing Operation Region |
| 689 | * WalkState - Current method state |
| 690 | * |
| 691 | * RETURN: Status |
| 692 | * |
| 693 | * DESCRIPTION: Create a new bank field in the specified operation region |
| 694 | * |
| 695 | ******************************************************************************/ |
| 696 | |
| 697 | ACPI_STATUS |
| 698 | AcpiDsCreateBankField ( |
| 699 | ACPI_PARSE_OBJECT *Op, |
| 700 | ACPI_NAMESPACE_NODE *RegionNode, |
| 701 | ACPI_WALK_STATE *WalkState) |
| 702 | { |
| 703 | ACPI_STATUS Status; |
| 704 | ACPI_PARSE_OBJECT *Arg; |
| 705 | ACPI_CREATE_FIELD_INFO Info; |
| 706 | |
| 707 | |
| 708 | ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op); |
| 709 | |
| 710 | |
| 711 | /* First arg is the name of the parent OpRegion (must already exist) */ |
| 712 | |
| 713 | Arg = Op->Common.Value.Arg; |
| 714 | if (!RegionNode) |
| 715 | { |
| 716 | Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, |
| 717 | ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, |
| 718 | ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); |
| 719 | #ifdef ACPI_ASL_COMPILER |
| 720 | Status = AcpiDsCreateExternalRegion (Status, Arg, |
| 721 | Arg->Common.Value.Name, WalkState, &RegionNode); |
| 722 | #endif |
| 723 | if (ACPI_FAILURE (Status)) |
| 724 | { |
| 725 | ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status); |
| 726 | return_ACPI_STATUS (Status); |
| 727 | } |
| 728 | } |
| 729 | |
| 730 | /* Second arg is the Bank Register (Field) (must already exist) */ |
| 731 | |
| 732 | Arg = Arg->Common.Next; |
| 733 | Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, |
| 734 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, |
| 735 | ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); |
| 736 | if (ACPI_FAILURE (Status)) |
| 737 | { |
| 738 | ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); |
| 739 | return_ACPI_STATUS (Status); |
| 740 | } |
| 741 | |
| 742 | /* |
| 743 | * Third arg is the BankValue |
| 744 | * This arg is a TermArg, not a constant |
| 745 | * It will be evaluated later, by AcpiDsEvalBankFieldOperands |
| 746 | */ |
| 747 | Arg = Arg->Common.Next; |
| 748 | |
| 749 | /* Fourth arg is the field flags */ |
| 750 | |
| 751 | Arg = Arg->Common.Next; |
| 752 | Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; |
| 753 | |
| 754 | /* Each remaining arg is a Named Field */ |
| 755 | |
| 756 | Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD; |
| 757 | Info.RegionNode = RegionNode; |
| 758 | |
| 759 | /* |
| 760 | * Use Info.DataRegisterNode to store BankField Op |
| 761 | * It's safe because DataRegisterNode will never be used when create |
| 762 | * bank field \we store AmlStart and AmlLength in the BankField Op for |
| 763 | * late evaluation. Used in AcpiExPrepFieldValue(Info) |
| 764 | * |
| 765 | * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like |
| 766 | * "void *ParentOp"? |
| 767 | */ |
| 768 | Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op; |
| 769 | |
| 770 | Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); |
| 771 | return_ACPI_STATUS (Status); |
| 772 | } |
| 773 | |
| 774 | |
| 775 | /******************************************************************************* |
| 776 | * |
| 777 | * FUNCTION: AcpiDsCreateIndexField |
| 778 | * |
| 779 | * PARAMETERS: Op - Op containing the Field definition and args |
| 780 | * RegionNode - Object for the containing Operation Region |
| 781 | * ` WalkState - Current method state |
| 782 | * |
| 783 | * RETURN: Status |
| 784 | * |
| 785 | * DESCRIPTION: Create a new index field in the specified operation region |
| 786 | * |
| 787 | ******************************************************************************/ |
| 788 | |
| 789 | ACPI_STATUS |
| 790 | AcpiDsCreateIndexField ( |
| 791 | ACPI_PARSE_OBJECT *Op, |
| 792 | ACPI_NAMESPACE_NODE *RegionNode, |
| 793 | ACPI_WALK_STATE *WalkState) |
| 794 | { |
| 795 | ACPI_STATUS Status; |
| 796 | ACPI_PARSE_OBJECT *Arg; |
| 797 | ACPI_CREATE_FIELD_INFO Info; |
| 798 | |
| 799 | |
| 800 | ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op); |
| 801 | |
| 802 | |
| 803 | /* First arg is the name of the Index register (must already exist) */ |
| 804 | |
| 805 | Arg = Op->Common.Value.Arg; |
| 806 | Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, |
| 807 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, |
| 808 | ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); |
| 809 | if (ACPI_FAILURE (Status)) |
| 810 | { |
| 811 | ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); |
| 812 | return_ACPI_STATUS (Status); |
| 813 | } |
| 814 | |
| 815 | /* Second arg is the data register (must already exist) */ |
| 816 | |
| 817 | Arg = Arg->Common.Next; |
| 818 | Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, |
| 819 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, |
| 820 | ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode); |
| 821 | if (ACPI_FAILURE (Status)) |
| 822 | { |
| 823 | ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); |
| 824 | return_ACPI_STATUS (Status); |
| 825 | } |
| 826 | |
| 827 | /* Next arg is the field flags */ |
| 828 | |
| 829 | Arg = Arg->Common.Next; |
| 830 | Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; |
| 831 | |
| 832 | /* Each remaining arg is a Named Field */ |
| 833 | |
| 834 | Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD; |
| 835 | Info.RegionNode = RegionNode; |
| 836 | |
| 837 | Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); |
| 838 | return_ACPI_STATUS (Status); |
| 839 | } |
| 840 | |