| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: exstore - AML Interpreter object store support |
| 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 "acdispat.h" |
| 47 | #include "acinterp.h" |
| 48 | #include "amlcode.h" |
| 49 | #include "acnamesp.h" |
| 50 | |
| 51 | |
| 52 | #define _COMPONENT ACPI_EXECUTER |
| 53 | ACPI_MODULE_NAME ("exstore" ) |
| 54 | |
| 55 | /* Local prototypes */ |
| 56 | |
| 57 | static ACPI_STATUS |
| 58 | AcpiExStoreObjectToIndex ( |
| 59 | ACPI_OPERAND_OBJECT *ValDesc, |
| 60 | ACPI_OPERAND_OBJECT *DestDesc, |
| 61 | ACPI_WALK_STATE *WalkState); |
| 62 | |
| 63 | static ACPI_STATUS |
| 64 | AcpiExStoreDirectToNode ( |
| 65 | ACPI_OPERAND_OBJECT *SourceDesc, |
| 66 | ACPI_NAMESPACE_NODE *Node, |
| 67 | ACPI_WALK_STATE *WalkState); |
| 68 | |
| 69 | |
| 70 | /******************************************************************************* |
| 71 | * |
| 72 | * FUNCTION: AcpiExStore |
| 73 | * |
| 74 | * PARAMETERS: *SourceDesc - Value to be stored |
| 75 | * *DestDesc - Where to store it. Must be an NS node |
| 76 | * or ACPI_OPERAND_OBJECT of type |
| 77 | * Reference; |
| 78 | * WalkState - Current walk state |
| 79 | * |
| 80 | * RETURN: Status |
| 81 | * |
| 82 | * DESCRIPTION: Store the value described by SourceDesc into the location |
| 83 | * described by DestDesc. Called by various interpreter |
| 84 | * functions to store the result of an operation into |
| 85 | * the destination operand -- not just simply the actual "Store" |
| 86 | * ASL operator. |
| 87 | * |
| 88 | ******************************************************************************/ |
| 89 | |
| 90 | ACPI_STATUS |
| 91 | AcpiExStore ( |
| 92 | ACPI_OPERAND_OBJECT *SourceDesc, |
| 93 | ACPI_OPERAND_OBJECT *DestDesc, |
| 94 | ACPI_WALK_STATE *WalkState) |
| 95 | { |
| 96 | ACPI_STATUS Status = AE_OK; |
| 97 | ACPI_OPERAND_OBJECT *RefDesc = DestDesc; |
| 98 | |
| 99 | |
| 100 | ACPI_FUNCTION_TRACE_PTR (ExStore, DestDesc); |
| 101 | |
| 102 | |
| 103 | /* Validate parameters */ |
| 104 | |
| 105 | if (!SourceDesc || !DestDesc) |
| 106 | { |
| 107 | ACPI_ERROR ((AE_INFO, "Null parameter" )); |
| 108 | return_ACPI_STATUS (AE_AML_NO_OPERAND); |
| 109 | } |
| 110 | |
| 111 | /* DestDesc can be either a namespace node or an ACPI object */ |
| 112 | |
| 113 | if (ACPI_GET_DESCRIPTOR_TYPE (DestDesc) == ACPI_DESC_TYPE_NAMED) |
| 114 | { |
| 115 | /* |
| 116 | * Dest is a namespace node, |
| 117 | * Storing an object into a Named node. |
| 118 | */ |
| 119 | Status = AcpiExStoreObjectToNode (SourceDesc, |
| 120 | (ACPI_NAMESPACE_NODE *) DestDesc, WalkState, |
| 121 | ACPI_IMPLICIT_CONVERSION); |
| 122 | |
| 123 | return_ACPI_STATUS (Status); |
| 124 | } |
| 125 | |
| 126 | /* Destination object must be a Reference or a Constant object */ |
| 127 | |
| 128 | switch (DestDesc->Common.Type) |
| 129 | { |
| 130 | case ACPI_TYPE_LOCAL_REFERENCE: |
| 131 | |
| 132 | break; |
| 133 | |
| 134 | case ACPI_TYPE_INTEGER: |
| 135 | |
| 136 | /* Allow stores to Constants -- a Noop as per ACPI spec */ |
| 137 | |
| 138 | if (DestDesc->Common.Flags & AOPOBJ_AML_CONSTANT) |
| 139 | { |
| 140 | return_ACPI_STATUS (AE_OK); |
| 141 | } |
| 142 | |
| 143 | /*lint -fallthrough */ |
| 144 | |
| 145 | default: |
| 146 | |
| 147 | /* Destination is not a Reference object */ |
| 148 | |
| 149 | ACPI_ERROR ((AE_INFO, |
| 150 | "Target is not a Reference or Constant object - [%s] %p" , |
| 151 | AcpiUtGetObjectTypeName (DestDesc), DestDesc)); |
| 152 | |
| 153 | return_ACPI_STATUS (AE_AML_OPERAND_TYPE); |
| 154 | } |
| 155 | |
| 156 | /* |
| 157 | * Examine the Reference class. These cases are handled: |
| 158 | * |
| 159 | * 1) Store to Name (Change the object associated with a name) |
| 160 | * 2) Store to an indexed area of a Buffer or Package |
| 161 | * 3) Store to a Method Local or Arg |
| 162 | * 4) Store to the debug object |
| 163 | */ |
| 164 | switch (RefDesc->Reference.Class) |
| 165 | { |
| 166 | case ACPI_REFCLASS_REFOF: |
| 167 | |
| 168 | /* Storing an object into a Name "container" */ |
| 169 | |
| 170 | Status = AcpiExStoreObjectToNode (SourceDesc, |
| 171 | RefDesc->Reference.Object, |
| 172 | WalkState, ACPI_IMPLICIT_CONVERSION); |
| 173 | break; |
| 174 | |
| 175 | case ACPI_REFCLASS_INDEX: |
| 176 | |
| 177 | /* Storing to an Index (pointer into a packager or buffer) */ |
| 178 | |
| 179 | Status = AcpiExStoreObjectToIndex (SourceDesc, RefDesc, WalkState); |
| 180 | break; |
| 181 | |
| 182 | case ACPI_REFCLASS_LOCAL: |
| 183 | case ACPI_REFCLASS_ARG: |
| 184 | |
| 185 | /* Store to a method local/arg */ |
| 186 | |
| 187 | Status = AcpiDsStoreObjectToLocal (RefDesc->Reference.Class, |
| 188 | RefDesc->Reference.Value, SourceDesc, WalkState); |
| 189 | break; |
| 190 | |
| 191 | case ACPI_REFCLASS_DEBUG: |
| 192 | /* |
| 193 | * Storing to the Debug object causes the value stored to be |
| 194 | * displayed and otherwise has no effect -- see ACPI Specification |
| 195 | */ |
| 196 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 197 | "**** Write to Debug Object: Object %p [%s] ****:\n\n" , |
| 198 | SourceDesc, AcpiUtGetObjectTypeName (SourceDesc))); |
| 199 | |
| 200 | ACPI_DEBUG_OBJECT (SourceDesc, 0, 0); |
| 201 | break; |
| 202 | |
| 203 | default: |
| 204 | |
| 205 | ACPI_ERROR ((AE_INFO, "Unknown Reference Class 0x%2.2X" , |
| 206 | RefDesc->Reference.Class)); |
| 207 | ACPI_DUMP_ENTRY (RefDesc, ACPI_LV_INFO); |
| 208 | |
| 209 | Status = AE_AML_INTERNAL; |
| 210 | break; |
| 211 | } |
| 212 | |
| 213 | return_ACPI_STATUS (Status); |
| 214 | } |
| 215 | |
| 216 | |
| 217 | /******************************************************************************* |
| 218 | * |
| 219 | * FUNCTION: AcpiExStoreObjectToIndex |
| 220 | * |
| 221 | * PARAMETERS: *SourceDesc - Value to be stored |
| 222 | * *DestDesc - Named object to receive the value |
| 223 | * WalkState - Current walk state |
| 224 | * |
| 225 | * RETURN: Status |
| 226 | * |
| 227 | * DESCRIPTION: Store the object to indexed Buffer or Package element |
| 228 | * |
| 229 | ******************************************************************************/ |
| 230 | |
| 231 | static ACPI_STATUS |
| 232 | AcpiExStoreObjectToIndex ( |
| 233 | ACPI_OPERAND_OBJECT *SourceDesc, |
| 234 | ACPI_OPERAND_OBJECT *IndexDesc, |
| 235 | ACPI_WALK_STATE *WalkState) |
| 236 | { |
| 237 | ACPI_STATUS Status = AE_OK; |
| 238 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 239 | ACPI_OPERAND_OBJECT *NewDesc; |
| 240 | UINT8 Value = 0; |
| 241 | UINT32 i; |
| 242 | |
| 243 | |
| 244 | ACPI_FUNCTION_TRACE (ExStoreObjectToIndex); |
| 245 | |
| 246 | |
| 247 | /* |
| 248 | * Destination must be a reference pointer, and |
| 249 | * must point to either a buffer or a package |
| 250 | */ |
| 251 | switch (IndexDesc->Reference.TargetType) |
| 252 | { |
| 253 | case ACPI_TYPE_PACKAGE: |
| 254 | /* |
| 255 | * Storing to a package element. Copy the object and replace |
| 256 | * any existing object with the new object. No implicit |
| 257 | * conversion is performed. |
| 258 | * |
| 259 | * The object at *(IndexDesc->Reference.Where) is the |
| 260 | * element within the package that is to be modified. |
| 261 | * The parent package object is at IndexDesc->Reference.Object |
| 262 | */ |
| 263 | ObjDesc = *(IndexDesc->Reference.Where); |
| 264 | |
| 265 | if (SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE && |
| 266 | SourceDesc->Reference.Class == ACPI_REFCLASS_TABLE) |
| 267 | { |
| 268 | /* This is a DDBHandle, just add a reference to it */ |
| 269 | |
| 270 | AcpiUtAddReference (SourceDesc); |
| 271 | NewDesc = SourceDesc; |
| 272 | } |
| 273 | else |
| 274 | { |
| 275 | /* Normal object, copy it */ |
| 276 | |
| 277 | Status = AcpiUtCopyIobjectToIobject ( |
| 278 | SourceDesc, &NewDesc, WalkState); |
| 279 | if (ACPI_FAILURE (Status)) |
| 280 | { |
| 281 | return_ACPI_STATUS (Status); |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | if (ObjDesc) |
| 286 | { |
| 287 | /* Decrement reference count by the ref count of the parent package */ |
| 288 | |
| 289 | for (i = 0; |
| 290 | i < ((ACPI_OPERAND_OBJECT *) |
| 291 | IndexDesc->Reference.Object)->Common.ReferenceCount; |
| 292 | i++) |
| 293 | { |
| 294 | AcpiUtRemoveReference (ObjDesc); |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | *(IndexDesc->Reference.Where) = NewDesc; |
| 299 | |
| 300 | /* Increment ref count by the ref count of the parent package-1 */ |
| 301 | |
| 302 | for (i = 1; |
| 303 | i < ((ACPI_OPERAND_OBJECT *) |
| 304 | IndexDesc->Reference.Object)->Common.ReferenceCount; |
| 305 | i++) |
| 306 | { |
| 307 | AcpiUtAddReference (NewDesc); |
| 308 | } |
| 309 | |
| 310 | break; |
| 311 | |
| 312 | case ACPI_TYPE_BUFFER_FIELD: |
| 313 | /* |
| 314 | * Store into a Buffer or String (not actually a real BufferField) |
| 315 | * at a location defined by an Index. |
| 316 | * |
| 317 | * The first 8-bit element of the source object is written to the |
| 318 | * 8-bit Buffer location defined by the Index destination object, |
| 319 | * according to the ACPI 2.0 specification. |
| 320 | */ |
| 321 | |
| 322 | /* |
| 323 | * Make sure the target is a Buffer or String. An error should |
| 324 | * not happen here, since the ReferenceObject was constructed |
| 325 | * by the INDEX_OP code. |
| 326 | */ |
| 327 | ObjDesc = IndexDesc->Reference.Object; |
| 328 | if ((ObjDesc->Common.Type != ACPI_TYPE_BUFFER) && |
| 329 | (ObjDesc->Common.Type != ACPI_TYPE_STRING)) |
| 330 | { |
| 331 | return_ACPI_STATUS (AE_AML_OPERAND_TYPE); |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * The assignment of the individual elements will be slightly |
| 336 | * different for each source type. |
| 337 | */ |
| 338 | switch (SourceDesc->Common.Type) |
| 339 | { |
| 340 | case ACPI_TYPE_INTEGER: |
| 341 | |
| 342 | /* Use the least-significant byte of the integer */ |
| 343 | |
| 344 | Value = (UINT8) (SourceDesc->Integer.Value); |
| 345 | break; |
| 346 | |
| 347 | case ACPI_TYPE_BUFFER: |
| 348 | case ACPI_TYPE_STRING: |
| 349 | |
| 350 | /* Note: Takes advantage of common string/buffer fields */ |
| 351 | |
| 352 | Value = SourceDesc->Buffer.Pointer[0]; |
| 353 | break; |
| 354 | |
| 355 | default: |
| 356 | |
| 357 | /* All other types are invalid */ |
| 358 | |
| 359 | ACPI_ERROR ((AE_INFO, |
| 360 | "Source must be type [Integer/Buffer/String], found [%s]" , |
| 361 | AcpiUtGetObjectTypeName (SourceDesc))); |
| 362 | return_ACPI_STATUS (AE_AML_OPERAND_TYPE); |
| 363 | } |
| 364 | |
| 365 | /* Store the source value into the target buffer byte */ |
| 366 | |
| 367 | ObjDesc->Buffer.Pointer[IndexDesc->Reference.Value] = Value; |
| 368 | break; |
| 369 | |
| 370 | default: |
| 371 | ACPI_ERROR ((AE_INFO, |
| 372 | "Target is not of type [Package/BufferField]" )); |
| 373 | Status = AE_AML_TARGET_TYPE; |
| 374 | break; |
| 375 | } |
| 376 | |
| 377 | return_ACPI_STATUS (Status); |
| 378 | } |
| 379 | |
| 380 | |
| 381 | /******************************************************************************* |
| 382 | * |
| 383 | * FUNCTION: AcpiExStoreObjectToNode |
| 384 | * |
| 385 | * PARAMETERS: SourceDesc - Value to be stored |
| 386 | * Node - Named object to receive the value |
| 387 | * WalkState - Current walk state |
| 388 | * ImplicitConversion - Perform implicit conversion (yes/no) |
| 389 | * |
| 390 | * RETURN: Status |
| 391 | * |
| 392 | * DESCRIPTION: Store the object to the named object. |
| 393 | * |
| 394 | * The assignment of an object to a named object is handled here. |
| 395 | * The value passed in will replace the current value (if any) |
| 396 | * with the input value. |
| 397 | * |
| 398 | * When storing into an object the data is converted to the |
| 399 | * target object type then stored in the object. This means |
| 400 | * that the target object type (for an initialized target) will |
| 401 | * not be changed by a store operation. A CopyObject can change |
| 402 | * the target type, however. |
| 403 | * |
| 404 | * The ImplicitConversion flag is set to NO/FALSE only when |
| 405 | * storing to an ArgX -- as per the rules of the ACPI spec. |
| 406 | * |
| 407 | * Assumes parameters are already validated. |
| 408 | * |
| 409 | ******************************************************************************/ |
| 410 | |
| 411 | ACPI_STATUS |
| 412 | AcpiExStoreObjectToNode ( |
| 413 | ACPI_OPERAND_OBJECT *SourceDesc, |
| 414 | ACPI_NAMESPACE_NODE *Node, |
| 415 | ACPI_WALK_STATE *WalkState, |
| 416 | UINT8 ImplicitConversion) |
| 417 | { |
| 418 | ACPI_STATUS Status = AE_OK; |
| 419 | ACPI_OPERAND_OBJECT *TargetDesc; |
| 420 | ACPI_OPERAND_OBJECT *NewDesc; |
| 421 | ACPI_OBJECT_TYPE TargetType; |
| 422 | |
| 423 | |
| 424 | ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToNode, SourceDesc); |
| 425 | |
| 426 | |
| 427 | /* Get current type of the node, and object attached to Node */ |
| 428 | |
| 429 | TargetType = AcpiNsGetType (Node); |
| 430 | TargetDesc = AcpiNsGetAttachedObject (Node); |
| 431 | |
| 432 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Storing %p [%s] to node %p [%s]\n" , |
| 433 | SourceDesc, AcpiUtGetObjectTypeName (SourceDesc), |
| 434 | Node, AcpiUtGetTypeName (TargetType))); |
| 435 | |
| 436 | /* Only limited target types possible for everything except CopyObject */ |
| 437 | |
| 438 | if (WalkState->Opcode != AML_COPY_OP) |
| 439 | { |
| 440 | /* |
| 441 | * Only CopyObject allows all object types to be overwritten. For |
| 442 | * TargetRef(s), there are restrictions on the object types that |
| 443 | * are allowed. |
| 444 | * |
| 445 | * Allowable operations/typing for Store: |
| 446 | * |
| 447 | * 1) Simple Store |
| 448 | * Integer --> Integer (Named/Local/Arg) |
| 449 | * String --> String (Named/Local/Arg) |
| 450 | * Buffer --> Buffer (Named/Local/Arg) |
| 451 | * Package --> Package (Named/Local/Arg) |
| 452 | * |
| 453 | * 2) Store with implicit conversion |
| 454 | * Integer --> String or Buffer (Named) |
| 455 | * String --> Integer or Buffer (Named) |
| 456 | * Buffer --> Integer or String (Named) |
| 457 | */ |
| 458 | switch (TargetType) |
| 459 | { |
| 460 | case ACPI_TYPE_PACKAGE: |
| 461 | /* |
| 462 | * Here, can only store a package to an existing package. |
| 463 | * Storing a package to a Local/Arg is OK, and handled |
| 464 | * elsewhere. |
| 465 | */ |
| 466 | if (WalkState->Opcode == AML_STORE_OP) |
| 467 | { |
| 468 | if (SourceDesc->Common.Type != ACPI_TYPE_PACKAGE) |
| 469 | { |
| 470 | ACPI_ERROR ((AE_INFO, |
| 471 | "Cannot assign type [%s] to [Package] " |
| 472 | "(source must be type Pkg)" , |
| 473 | AcpiUtGetObjectTypeName (SourceDesc))); |
| 474 | |
| 475 | return_ACPI_STATUS (AE_AML_TARGET_TYPE); |
| 476 | } |
| 477 | break; |
| 478 | } |
| 479 | |
| 480 | /* Fallthrough */ |
| 481 | |
| 482 | case ACPI_TYPE_DEVICE: |
| 483 | case ACPI_TYPE_EVENT: |
| 484 | case ACPI_TYPE_MUTEX: |
| 485 | case ACPI_TYPE_REGION: |
| 486 | case ACPI_TYPE_POWER: |
| 487 | case ACPI_TYPE_PROCESSOR: |
| 488 | case ACPI_TYPE_THERMAL: |
| 489 | |
| 490 | ACPI_ERROR ((AE_INFO, |
| 491 | "Target must be [Buffer/Integer/String/Reference]" |
| 492 | ", found [%s] (%4.4s)" , |
| 493 | AcpiUtGetTypeName (Node->Type), Node->Name.Ascii)); |
| 494 | |
| 495 | return_ACPI_STATUS (AE_AML_TARGET_TYPE); |
| 496 | |
| 497 | default: |
| 498 | break; |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | /* |
| 503 | * Resolve the source object to an actual value |
| 504 | * (If it is a reference object) |
| 505 | */ |
| 506 | Status = AcpiExResolveObject (&SourceDesc, TargetType, WalkState); |
| 507 | if (ACPI_FAILURE (Status)) |
| 508 | { |
| 509 | return_ACPI_STATUS (Status); |
| 510 | } |
| 511 | |
| 512 | /* Do the actual store operation */ |
| 513 | |
| 514 | switch (TargetType) |
| 515 | { |
| 516 | /* |
| 517 | * The simple data types all support implicit source operand |
| 518 | * conversion before the store. |
| 519 | */ |
| 520 | case ACPI_TYPE_INTEGER: |
| 521 | case ACPI_TYPE_STRING: |
| 522 | case ACPI_TYPE_BUFFER: |
| 523 | |
| 524 | if ((WalkState->Opcode == AML_COPY_OP) || |
| 525 | !ImplicitConversion) |
| 526 | { |
| 527 | /* |
| 528 | * However, CopyObject and Stores to ArgX do not perform |
| 529 | * an implicit conversion, as per the ACPI specification. |
| 530 | * A direct store is performed instead. |
| 531 | */ |
| 532 | Status = AcpiExStoreDirectToNode (SourceDesc, Node, WalkState); |
| 533 | break; |
| 534 | } |
| 535 | |
| 536 | /* Store with implicit source operand conversion support */ |
| 537 | |
| 538 | Status = AcpiExStoreObjectToObject (SourceDesc, TargetDesc, |
| 539 | &NewDesc, WalkState); |
| 540 | if (ACPI_FAILURE (Status)) |
| 541 | { |
| 542 | return_ACPI_STATUS (Status); |
| 543 | } |
| 544 | |
| 545 | if (NewDesc != TargetDesc) |
| 546 | { |
| 547 | /* |
| 548 | * Store the new NewDesc as the new value of the Name, and set |
| 549 | * the Name's type to that of the value being stored in it. |
| 550 | * SourceDesc reference count is incremented by AttachObject. |
| 551 | * |
| 552 | * Note: This may change the type of the node if an explicit |
| 553 | * store has been performed such that the node/object type |
| 554 | * has been changed. |
| 555 | */ |
| 556 | Status = AcpiNsAttachObject ( |
| 557 | Node, NewDesc, NewDesc->Common.Type); |
| 558 | |
| 559 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 560 | "Store type [%s] into [%s] via Convert/Attach\n" , |
| 561 | AcpiUtGetObjectTypeName (SourceDesc), |
| 562 | AcpiUtGetObjectTypeName (NewDesc))); |
| 563 | } |
| 564 | break; |
| 565 | |
| 566 | case ACPI_TYPE_BUFFER_FIELD: |
| 567 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 568 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 569 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 570 | /* |
| 571 | * For all fields, always write the source data to the target |
| 572 | * field. Any required implicit source operand conversion is |
| 573 | * performed in the function below as necessary. Note, field |
| 574 | * objects must retain their original type permanently. |
| 575 | */ |
| 576 | Status = AcpiExWriteDataToField (SourceDesc, TargetDesc, |
| 577 | &WalkState->ResultObj); |
| 578 | break; |
| 579 | |
| 580 | default: |
| 581 | /* |
| 582 | * CopyObject operator: No conversions for all other types. |
| 583 | * Instead, directly store a copy of the source object. |
| 584 | * |
| 585 | * This is the ACPI spec-defined behavior for the CopyObject |
| 586 | * operator. (Note, for this default case, all normal |
| 587 | * Store/Target operations exited above with an error). |
| 588 | */ |
| 589 | Status = AcpiExStoreDirectToNode (SourceDesc, Node, WalkState); |
| 590 | break; |
| 591 | } |
| 592 | |
| 593 | return_ACPI_STATUS (Status); |
| 594 | } |
| 595 | |
| 596 | |
| 597 | /******************************************************************************* |
| 598 | * |
| 599 | * FUNCTION: AcpiExStoreDirectToNode |
| 600 | * |
| 601 | * PARAMETERS: SourceDesc - Value to be stored |
| 602 | * Node - Named object to receive the value |
| 603 | * WalkState - Current walk state |
| 604 | * |
| 605 | * RETURN: Status |
| 606 | * |
| 607 | * DESCRIPTION: "Store" an object directly to a node. This involves a copy |
| 608 | * and an attach. |
| 609 | * |
| 610 | ******************************************************************************/ |
| 611 | |
| 612 | static ACPI_STATUS |
| 613 | AcpiExStoreDirectToNode ( |
| 614 | ACPI_OPERAND_OBJECT *SourceDesc, |
| 615 | ACPI_NAMESPACE_NODE *Node, |
| 616 | ACPI_WALK_STATE *WalkState) |
| 617 | { |
| 618 | ACPI_STATUS Status; |
| 619 | ACPI_OPERAND_OBJECT *NewDesc; |
| 620 | |
| 621 | |
| 622 | ACPI_FUNCTION_TRACE (ExStoreDirectToNode); |
| 623 | |
| 624 | |
| 625 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 626 | "Storing [%s] (%p) directly into node [%s] (%p)" |
| 627 | " with no implicit conversion\n" , |
| 628 | AcpiUtGetObjectTypeName (SourceDesc), SourceDesc, |
| 629 | AcpiUtGetTypeName (Node->Type), Node)); |
| 630 | |
| 631 | /* Copy the source object to a new object */ |
| 632 | |
| 633 | Status = AcpiUtCopyIobjectToIobject (SourceDesc, &NewDesc, WalkState); |
| 634 | if (ACPI_FAILURE (Status)) |
| 635 | { |
| 636 | return_ACPI_STATUS (Status); |
| 637 | } |
| 638 | |
| 639 | /* Attach the new object to the node */ |
| 640 | |
| 641 | Status = AcpiNsAttachObject (Node, NewDesc, NewDesc->Common.Type); |
| 642 | AcpiUtRemoveReference (NewDesc); |
| 643 | return_ACPI_STATUS (Status); |
| 644 | } |
| 645 | |