| 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: dsmthdat - control method arguments and local variables |
| 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 "acnamesp.h" |
| 48 | #include "acinterp.h" |
| 49 | |
| 50 | |
| 51 | #define _COMPONENT ACPI_DISPATCHER |
| 52 | ACPI_MODULE_NAME ("dsmthdat" ) |
| 53 | |
| 54 | /* Local prototypes */ |
| 55 | |
| 56 | static void |
| 57 | AcpiDsMethodDataDeleteValue ( |
| 58 | UINT8 Type, |
| 59 | UINT32 Index, |
| 60 | ACPI_WALK_STATE *WalkState); |
| 61 | |
| 62 | static ACPI_STATUS |
| 63 | AcpiDsMethodDataSetValue ( |
| 64 | UINT8 Type, |
| 65 | UINT32 Index, |
| 66 | ACPI_OPERAND_OBJECT *Object, |
| 67 | ACPI_WALK_STATE *WalkState); |
| 68 | |
| 69 | #ifdef ACPI_OBSOLETE_FUNCTIONS |
| 70 | ACPI_OBJECT_TYPE |
| 71 | AcpiDsMethodDataGetType ( |
| 72 | UINT16 Opcode, |
| 73 | UINT32 Index, |
| 74 | ACPI_WALK_STATE *WalkState); |
| 75 | #endif |
| 76 | |
| 77 | |
| 78 | /******************************************************************************* |
| 79 | * |
| 80 | * FUNCTION: AcpiDsMethodDataInit |
| 81 | * |
| 82 | * PARAMETERS: WalkState - Current walk state object |
| 83 | * |
| 84 | * RETURN: Status |
| 85 | * |
| 86 | * DESCRIPTION: Initialize the data structures that hold the method's arguments |
| 87 | * and locals. The data struct is an array of namespace nodes for |
| 88 | * each - this allows RefOf and DeRefOf to work properly for these |
| 89 | * special data types. |
| 90 | * |
| 91 | * NOTES: WalkState fields are initialized to zero by the |
| 92 | * ACPI_ALLOCATE_ZEROED(). |
| 93 | * |
| 94 | * A pseudo-Namespace Node is assigned to each argument and local |
| 95 | * so that RefOf() can return a pointer to the Node. |
| 96 | * |
| 97 | ******************************************************************************/ |
| 98 | |
| 99 | void |
| 100 | AcpiDsMethodDataInit ( |
| 101 | ACPI_WALK_STATE *WalkState) |
| 102 | { |
| 103 | UINT32 i; |
| 104 | |
| 105 | |
| 106 | ACPI_FUNCTION_TRACE (DsMethodDataInit); |
| 107 | |
| 108 | |
| 109 | /* Init the method arguments */ |
| 110 | |
| 111 | for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) |
| 112 | { |
| 113 | ACPI_MOVE_32_TO_32 (&WalkState->Arguments[i].Name, |
| 114 | NAMEOF_ARG_NTE); |
| 115 | |
| 116 | WalkState->Arguments[i].Name.Integer |= (i << 24); |
| 117 | WalkState->Arguments[i].DescriptorType = ACPI_DESC_TYPE_NAMED; |
| 118 | WalkState->Arguments[i].Type = ACPI_TYPE_ANY; |
| 119 | WalkState->Arguments[i].Flags = ANOBJ_METHOD_ARG; |
| 120 | } |
| 121 | |
| 122 | /* Init the method locals */ |
| 123 | |
| 124 | for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++) |
| 125 | { |
| 126 | ACPI_MOVE_32_TO_32 (&WalkState->LocalVariables[i].Name, |
| 127 | NAMEOF_LOCAL_NTE); |
| 128 | |
| 129 | WalkState->LocalVariables[i].Name.Integer |= (i << 24); |
| 130 | WalkState->LocalVariables[i].DescriptorType = ACPI_DESC_TYPE_NAMED; |
| 131 | WalkState->LocalVariables[i].Type = ACPI_TYPE_ANY; |
| 132 | WalkState->LocalVariables[i].Flags = ANOBJ_METHOD_LOCAL; |
| 133 | } |
| 134 | |
| 135 | return_VOID; |
| 136 | } |
| 137 | |
| 138 | |
| 139 | /******************************************************************************* |
| 140 | * |
| 141 | * FUNCTION: AcpiDsMethodDataDeleteAll |
| 142 | * |
| 143 | * PARAMETERS: WalkState - Current walk state object |
| 144 | * |
| 145 | * RETURN: None |
| 146 | * |
| 147 | * DESCRIPTION: Delete method locals and arguments. Arguments are only |
| 148 | * deleted if this method was called from another method. |
| 149 | * |
| 150 | ******************************************************************************/ |
| 151 | |
| 152 | void |
| 153 | AcpiDsMethodDataDeleteAll ( |
| 154 | ACPI_WALK_STATE *WalkState) |
| 155 | { |
| 156 | UINT32 Index; |
| 157 | |
| 158 | |
| 159 | ACPI_FUNCTION_TRACE (DsMethodDataDeleteAll); |
| 160 | |
| 161 | |
| 162 | /* Detach the locals */ |
| 163 | |
| 164 | for (Index = 0; Index < ACPI_METHOD_NUM_LOCALS; Index++) |
| 165 | { |
| 166 | if (WalkState->LocalVariables[Index].Object) |
| 167 | { |
| 168 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Local%u=%p\n" , |
| 169 | Index, WalkState->LocalVariables[Index].Object)); |
| 170 | |
| 171 | /* Detach object (if present) and remove a reference */ |
| 172 | |
| 173 | AcpiNsDetachObject (&WalkState->LocalVariables[Index]); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | /* Detach the arguments */ |
| 178 | |
| 179 | for (Index = 0; Index < ACPI_METHOD_NUM_ARGS; Index++) |
| 180 | { |
| 181 | if (WalkState->Arguments[Index].Object) |
| 182 | { |
| 183 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Arg%u=%p\n" , |
| 184 | Index, WalkState->Arguments[Index].Object)); |
| 185 | |
| 186 | /* Detach object (if present) and remove a reference */ |
| 187 | |
| 188 | AcpiNsDetachObject (&WalkState->Arguments[Index]); |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | return_VOID; |
| 193 | } |
| 194 | |
| 195 | |
| 196 | /******************************************************************************* |
| 197 | * |
| 198 | * FUNCTION: AcpiDsMethodDataInitArgs |
| 199 | * |
| 200 | * PARAMETERS: *Params - Pointer to a parameter list for the method |
| 201 | * MaxParamCount - The arg count for this method |
| 202 | * WalkState - Current walk state object |
| 203 | * |
| 204 | * RETURN: Status |
| 205 | * |
| 206 | * DESCRIPTION: Initialize arguments for a method. The parameter list is a list |
| 207 | * of ACPI operand objects, either null terminated or whose length |
| 208 | * is defined by MaxParamCount. |
| 209 | * |
| 210 | ******************************************************************************/ |
| 211 | |
| 212 | ACPI_STATUS |
| 213 | AcpiDsMethodDataInitArgs ( |
| 214 | ACPI_OPERAND_OBJECT **Params, |
| 215 | UINT32 MaxParamCount, |
| 216 | ACPI_WALK_STATE *WalkState) |
| 217 | { |
| 218 | ACPI_STATUS Status; |
| 219 | UINT32 Index = 0; |
| 220 | |
| 221 | |
| 222 | ACPI_FUNCTION_TRACE_PTR (DsMethodDataInitArgs, Params); |
| 223 | |
| 224 | |
| 225 | if (!Params) |
| 226 | { |
| 227 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 228 | "No parameter list passed to method\n" )); |
| 229 | return_ACPI_STATUS (AE_OK); |
| 230 | } |
| 231 | |
| 232 | /* Copy passed parameters into the new method stack frame */ |
| 233 | |
| 234 | while ((Index < ACPI_METHOD_NUM_ARGS) && |
| 235 | (Index < MaxParamCount) && |
| 236 | Params[Index]) |
| 237 | { |
| 238 | /* |
| 239 | * A valid parameter. |
| 240 | * Store the argument in the method/walk descriptor. |
| 241 | * Do not copy the arg in order to implement call by reference |
| 242 | */ |
| 243 | Status = AcpiDsMethodDataSetValue ( |
| 244 | ACPI_REFCLASS_ARG, Index, Params[Index], WalkState); |
| 245 | if (ACPI_FAILURE (Status)) |
| 246 | { |
| 247 | return_ACPI_STATUS (Status); |
| 248 | } |
| 249 | |
| 250 | Index++; |
| 251 | } |
| 252 | |
| 253 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%u args passed to method\n" , Index)); |
| 254 | return_ACPI_STATUS (AE_OK); |
| 255 | } |
| 256 | |
| 257 | |
| 258 | /******************************************************************************* |
| 259 | * |
| 260 | * FUNCTION: AcpiDsMethodDataGetNode |
| 261 | * |
| 262 | * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or |
| 263 | * ACPI_REFCLASS_ARG |
| 264 | * Index - Which Local or Arg whose type to get |
| 265 | * WalkState - Current walk state object |
| 266 | * Node - Where the node is returned. |
| 267 | * |
| 268 | * RETURN: Status and node |
| 269 | * |
| 270 | * DESCRIPTION: Get the Node associated with a local or arg. |
| 271 | * |
| 272 | ******************************************************************************/ |
| 273 | |
| 274 | ACPI_STATUS |
| 275 | AcpiDsMethodDataGetNode ( |
| 276 | UINT8 Type, |
| 277 | UINT32 Index, |
| 278 | ACPI_WALK_STATE *WalkState, |
| 279 | ACPI_NAMESPACE_NODE **Node) |
| 280 | { |
| 281 | ACPI_FUNCTION_TRACE (DsMethodDataGetNode); |
| 282 | |
| 283 | |
| 284 | /* |
| 285 | * Method Locals and Arguments are supported |
| 286 | */ |
| 287 | switch (Type) |
| 288 | { |
| 289 | case ACPI_REFCLASS_LOCAL: |
| 290 | |
| 291 | if (Index > ACPI_METHOD_MAX_LOCAL) |
| 292 | { |
| 293 | ACPI_ERROR ((AE_INFO, |
| 294 | "Local index %u is invalid (max %u)" , |
| 295 | Index, ACPI_METHOD_MAX_LOCAL)); |
| 296 | return_ACPI_STATUS (AE_AML_INVALID_INDEX); |
| 297 | } |
| 298 | |
| 299 | /* Return a pointer to the pseudo-node */ |
| 300 | |
| 301 | *Node = &WalkState->LocalVariables[Index]; |
| 302 | break; |
| 303 | |
| 304 | case ACPI_REFCLASS_ARG: |
| 305 | |
| 306 | if (Index > ACPI_METHOD_MAX_ARG) |
| 307 | { |
| 308 | ACPI_ERROR ((AE_INFO, |
| 309 | "Arg index %u is invalid (max %u)" , |
| 310 | Index, ACPI_METHOD_MAX_ARG)); |
| 311 | return_ACPI_STATUS (AE_AML_INVALID_INDEX); |
| 312 | } |
| 313 | |
| 314 | /* Return a pointer to the pseudo-node */ |
| 315 | |
| 316 | *Node = &WalkState->Arguments[Index]; |
| 317 | break; |
| 318 | |
| 319 | default: |
| 320 | |
| 321 | ACPI_ERROR ((AE_INFO, "Type %u is invalid" , Type)); |
| 322 | return_ACPI_STATUS (AE_TYPE); |
| 323 | } |
| 324 | |
| 325 | return_ACPI_STATUS (AE_OK); |
| 326 | } |
| 327 | |
| 328 | |
| 329 | /******************************************************************************* |
| 330 | * |
| 331 | * FUNCTION: AcpiDsMethodDataSetValue |
| 332 | * |
| 333 | * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or |
| 334 | * ACPI_REFCLASS_ARG |
| 335 | * Index - Which Local or Arg to get |
| 336 | * Object - Object to be inserted into the stack entry |
| 337 | * WalkState - Current walk state object |
| 338 | * |
| 339 | * RETURN: Status |
| 340 | * |
| 341 | * DESCRIPTION: Insert an object onto the method stack at entry Opcode:Index. |
| 342 | * Note: There is no "implicit conversion" for locals. |
| 343 | * |
| 344 | ******************************************************************************/ |
| 345 | |
| 346 | static ACPI_STATUS |
| 347 | AcpiDsMethodDataSetValue ( |
| 348 | UINT8 Type, |
| 349 | UINT32 Index, |
| 350 | ACPI_OPERAND_OBJECT *Object, |
| 351 | ACPI_WALK_STATE *WalkState) |
| 352 | { |
| 353 | ACPI_STATUS Status; |
| 354 | ACPI_NAMESPACE_NODE *Node; |
| 355 | |
| 356 | |
| 357 | ACPI_FUNCTION_TRACE (DsMethodDataSetValue); |
| 358 | |
| 359 | |
| 360 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 361 | "NewObj %p Type %2.2X, Refs=%u [%s]\n" , Object, |
| 362 | Type, Object->Common.ReferenceCount, |
| 363 | AcpiUtGetTypeName (Object->Common.Type))); |
| 364 | |
| 365 | /* Get the namespace node for the arg/local */ |
| 366 | |
| 367 | Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node); |
| 368 | if (ACPI_FAILURE (Status)) |
| 369 | { |
| 370 | return_ACPI_STATUS (Status); |
| 371 | } |
| 372 | |
| 373 | /* |
| 374 | * Increment ref count so object can't be deleted while installed. |
| 375 | * NOTE: We do not copy the object in order to preserve the call by |
| 376 | * reference semantics of ACPI Control Method invocation. |
| 377 | * (See ACPI Specification 2.0C) |
| 378 | */ |
| 379 | AcpiUtAddReference (Object); |
| 380 | |
| 381 | /* Install the object */ |
| 382 | |
| 383 | Node->Object = Object; |
| 384 | return_ACPI_STATUS (Status); |
| 385 | } |
| 386 | |
| 387 | |
| 388 | /******************************************************************************* |
| 389 | * |
| 390 | * FUNCTION: AcpiDsMethodDataGetValue |
| 391 | * |
| 392 | * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or |
| 393 | * ACPI_REFCLASS_ARG |
| 394 | * Index - Which localVar or argument to get |
| 395 | * WalkState - Current walk state object |
| 396 | * DestDesc - Where Arg or Local value is returned |
| 397 | * |
| 398 | * RETURN: Status |
| 399 | * |
| 400 | * DESCRIPTION: Retrieve value of selected Arg or Local for this method |
| 401 | * Used only in AcpiExResolveToValue(). |
| 402 | * |
| 403 | ******************************************************************************/ |
| 404 | |
| 405 | ACPI_STATUS |
| 406 | AcpiDsMethodDataGetValue ( |
| 407 | UINT8 Type, |
| 408 | UINT32 Index, |
| 409 | ACPI_WALK_STATE *WalkState, |
| 410 | ACPI_OPERAND_OBJECT **DestDesc) |
| 411 | { |
| 412 | ACPI_STATUS Status; |
| 413 | ACPI_NAMESPACE_NODE *Node; |
| 414 | ACPI_OPERAND_OBJECT *Object; |
| 415 | |
| 416 | |
| 417 | ACPI_FUNCTION_TRACE (DsMethodDataGetValue); |
| 418 | |
| 419 | |
| 420 | /* Validate the object descriptor */ |
| 421 | |
| 422 | if (!DestDesc) |
| 423 | { |
| 424 | ACPI_ERROR ((AE_INFO, "Null object descriptor pointer" )); |
| 425 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 426 | } |
| 427 | |
| 428 | /* Get the namespace node for the arg/local */ |
| 429 | |
| 430 | Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node); |
| 431 | if (ACPI_FAILURE (Status)) |
| 432 | { |
| 433 | return_ACPI_STATUS (Status); |
| 434 | } |
| 435 | |
| 436 | /* Get the object from the node */ |
| 437 | |
| 438 | Object = Node->Object; |
| 439 | |
| 440 | /* Examine the returned object, it must be valid. */ |
| 441 | |
| 442 | if (!Object) |
| 443 | { |
| 444 | /* |
| 445 | * Index points to uninitialized object. |
| 446 | * This means that either 1) The expected argument was |
| 447 | * not passed to the method, or 2) A local variable |
| 448 | * was referenced by the method (via the ASL) |
| 449 | * before it was initialized. Either case is an error. |
| 450 | */ |
| 451 | |
| 452 | /* If slack enabled, init the LocalX/ArgX to an Integer of value zero */ |
| 453 | |
| 454 | if (AcpiGbl_EnableInterpreterSlack) |
| 455 | { |
| 456 | Object = AcpiUtCreateIntegerObject ((UINT64) 0); |
| 457 | if (!Object) |
| 458 | { |
| 459 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 460 | } |
| 461 | |
| 462 | Node->Object = Object; |
| 463 | } |
| 464 | |
| 465 | /* Otherwise, return the error */ |
| 466 | |
| 467 | else switch (Type) |
| 468 | { |
| 469 | case ACPI_REFCLASS_ARG: |
| 470 | |
| 471 | ACPI_ERROR ((AE_INFO, |
| 472 | "Uninitialized Arg[%u] at node %p" , |
| 473 | Index, Node)); |
| 474 | |
| 475 | return_ACPI_STATUS (AE_AML_UNINITIALIZED_ARG); |
| 476 | |
| 477 | case ACPI_REFCLASS_LOCAL: |
| 478 | /* |
| 479 | * No error message for this case, will be trapped again later to |
| 480 | * detect and ignore cases of Store(LocalX,LocalX) |
| 481 | */ |
| 482 | return_ACPI_STATUS (AE_AML_UNINITIALIZED_LOCAL); |
| 483 | |
| 484 | default: |
| 485 | |
| 486 | ACPI_ERROR ((AE_INFO, "Not a Arg/Local opcode: 0x%X" , Type)); |
| 487 | return_ACPI_STATUS (AE_AML_INTERNAL); |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | /* |
| 492 | * The Index points to an initialized and valid object. |
| 493 | * Return an additional reference to the object |
| 494 | */ |
| 495 | *DestDesc = Object; |
| 496 | AcpiUtAddReference (Object); |
| 497 | |
| 498 | return_ACPI_STATUS (AE_OK); |
| 499 | } |
| 500 | |
| 501 | |
| 502 | /******************************************************************************* |
| 503 | * |
| 504 | * FUNCTION: AcpiDsMethodDataDeleteValue |
| 505 | * |
| 506 | * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or |
| 507 | * ACPI_REFCLASS_ARG |
| 508 | * Index - Which localVar or argument to delete |
| 509 | * WalkState - Current walk state object |
| 510 | * |
| 511 | * RETURN: None |
| 512 | * |
| 513 | * DESCRIPTION: Delete the entry at Opcode:Index. Inserts |
| 514 | * a null into the stack slot after the object is deleted. |
| 515 | * |
| 516 | ******************************************************************************/ |
| 517 | |
| 518 | static void |
| 519 | AcpiDsMethodDataDeleteValue ( |
| 520 | UINT8 Type, |
| 521 | UINT32 Index, |
| 522 | ACPI_WALK_STATE *WalkState) |
| 523 | { |
| 524 | ACPI_STATUS Status; |
| 525 | ACPI_NAMESPACE_NODE *Node; |
| 526 | ACPI_OPERAND_OBJECT *Object; |
| 527 | |
| 528 | |
| 529 | ACPI_FUNCTION_TRACE (DsMethodDataDeleteValue); |
| 530 | |
| 531 | |
| 532 | /* Get the namespace node for the arg/local */ |
| 533 | |
| 534 | Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node); |
| 535 | if (ACPI_FAILURE (Status)) |
| 536 | { |
| 537 | return_VOID; |
| 538 | } |
| 539 | |
| 540 | /* Get the associated object */ |
| 541 | |
| 542 | Object = AcpiNsGetAttachedObject (Node); |
| 543 | |
| 544 | /* |
| 545 | * Undefine the Arg or Local by setting its descriptor |
| 546 | * pointer to NULL. Locals/Args can contain both |
| 547 | * ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs |
| 548 | */ |
| 549 | Node->Object = NULL; |
| 550 | |
| 551 | if ((Object) && |
| 552 | (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_OPERAND)) |
| 553 | { |
| 554 | /* |
| 555 | * There is a valid object. |
| 556 | * Decrement the reference count by one to balance the |
| 557 | * increment when the object was stored. |
| 558 | */ |
| 559 | AcpiUtRemoveReference (Object); |
| 560 | } |
| 561 | |
| 562 | return_VOID; |
| 563 | } |
| 564 | |
| 565 | |
| 566 | /******************************************************************************* |
| 567 | * |
| 568 | * FUNCTION: AcpiDsStoreObjectToLocal |
| 569 | * |
| 570 | * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or |
| 571 | * ACPI_REFCLASS_ARG |
| 572 | * Index - Which Local or Arg to set |
| 573 | * ObjDesc - Value to be stored |
| 574 | * WalkState - Current walk state |
| 575 | * |
| 576 | * RETURN: Status |
| 577 | * |
| 578 | * DESCRIPTION: Store a value in an Arg or Local. The ObjDesc is installed |
| 579 | * as the new value for the Arg or Local and the reference count |
| 580 | * for ObjDesc is incremented. |
| 581 | * |
| 582 | ******************************************************************************/ |
| 583 | |
| 584 | ACPI_STATUS |
| 585 | AcpiDsStoreObjectToLocal ( |
| 586 | UINT8 Type, |
| 587 | UINT32 Index, |
| 588 | ACPI_OPERAND_OBJECT *ObjDesc, |
| 589 | ACPI_WALK_STATE *WalkState) |
| 590 | { |
| 591 | ACPI_STATUS Status; |
| 592 | ACPI_NAMESPACE_NODE *Node; |
| 593 | ACPI_OPERAND_OBJECT *CurrentObjDesc; |
| 594 | ACPI_OPERAND_OBJECT *NewObjDesc; |
| 595 | |
| 596 | |
| 597 | ACPI_FUNCTION_TRACE (DsStoreObjectToLocal); |
| 598 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Type=%2.2X Index=%u Obj=%p\n" , |
| 599 | Type, Index, ObjDesc)); |
| 600 | |
| 601 | /* Parameter validation */ |
| 602 | |
| 603 | if (!ObjDesc) |
| 604 | { |
| 605 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 606 | } |
| 607 | |
| 608 | /* Get the namespace node for the arg/local */ |
| 609 | |
| 610 | Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node); |
| 611 | if (ACPI_FAILURE (Status)) |
| 612 | { |
| 613 | return_ACPI_STATUS (Status); |
| 614 | } |
| 615 | |
| 616 | CurrentObjDesc = AcpiNsGetAttachedObject (Node); |
| 617 | if (CurrentObjDesc == ObjDesc) |
| 618 | { |
| 619 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p already installed!\n" , |
| 620 | ObjDesc)); |
| 621 | return_ACPI_STATUS (Status); |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * If the reference count on the object is more than one, we must |
| 626 | * take a copy of the object before we store. A reference count |
| 627 | * of exactly 1 means that the object was just created during the |
| 628 | * evaluation of an expression, and we can safely use it since it |
| 629 | * is not used anywhere else. |
| 630 | */ |
| 631 | NewObjDesc = ObjDesc; |
| 632 | if (ObjDesc->Common.ReferenceCount > 1) |
| 633 | { |
| 634 | Status = AcpiUtCopyIobjectToIobject ( |
| 635 | ObjDesc, &NewObjDesc, WalkState); |
| 636 | if (ACPI_FAILURE (Status)) |
| 637 | { |
| 638 | return_ACPI_STATUS (Status); |
| 639 | } |
| 640 | } |
| 641 | |
| 642 | /* |
| 643 | * If there is an object already in this slot, we either |
| 644 | * have to delete it, or if this is an argument and there |
| 645 | * is an object reference stored there, we have to do |
| 646 | * an indirect store! |
| 647 | */ |
| 648 | if (CurrentObjDesc) |
| 649 | { |
| 650 | /* |
| 651 | * Check for an indirect store if an argument |
| 652 | * contains an object reference (stored as an Node). |
| 653 | * We don't allow this automatic dereferencing for |
| 654 | * locals, since a store to a local should overwrite |
| 655 | * anything there, including an object reference. |
| 656 | * |
| 657 | * If both Arg0 and Local0 contain RefOf (Local4): |
| 658 | * |
| 659 | * Store (1, Arg0) - Causes indirect store to local4 |
| 660 | * Store (1, Local0) - Stores 1 in local0, overwriting |
| 661 | * the reference to local4 |
| 662 | * Store (1, DeRefof (Local0)) - Causes indirect store to local4 |
| 663 | * |
| 664 | * Weird, but true. |
| 665 | */ |
| 666 | if (Type == ACPI_REFCLASS_ARG) |
| 667 | { |
| 668 | /* |
| 669 | * If we have a valid reference object that came from RefOf(), |
| 670 | * do the indirect store |
| 671 | */ |
| 672 | if ((ACPI_GET_DESCRIPTOR_TYPE (CurrentObjDesc) == |
| 673 | ACPI_DESC_TYPE_OPERAND) && |
| 674 | (CurrentObjDesc->Common.Type == |
| 675 | ACPI_TYPE_LOCAL_REFERENCE) && |
| 676 | (CurrentObjDesc->Reference.Class == |
| 677 | ACPI_REFCLASS_REFOF)) |
| 678 | { |
| 679 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 680 | "Arg (%p) is an ObjRef(Node), storing in node %p\n" , |
| 681 | NewObjDesc, CurrentObjDesc)); |
| 682 | |
| 683 | /* |
| 684 | * Store this object to the Node (perform the indirect store) |
| 685 | * NOTE: No implicit conversion is performed, as per the ACPI |
| 686 | * specification rules on storing to Locals/Args. |
| 687 | */ |
| 688 | Status = AcpiExStoreObjectToNode (NewObjDesc, |
| 689 | CurrentObjDesc->Reference.Object, WalkState, |
| 690 | ACPI_NO_IMPLICIT_CONVERSION); |
| 691 | |
| 692 | /* Remove local reference if we copied the object above */ |
| 693 | |
| 694 | if (NewObjDesc != ObjDesc) |
| 695 | { |
| 696 | AcpiUtRemoveReference (NewObjDesc); |
| 697 | } |
| 698 | |
| 699 | return_ACPI_STATUS (Status); |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | /* Delete the existing object before storing the new one */ |
| 704 | |
| 705 | AcpiDsMethodDataDeleteValue (Type, Index, WalkState); |
| 706 | } |
| 707 | |
| 708 | /* |
| 709 | * Install the Obj descriptor (*NewObjDesc) into |
| 710 | * the descriptor for the Arg or Local. |
| 711 | * (increments the object reference count by one) |
| 712 | */ |
| 713 | Status = AcpiDsMethodDataSetValue (Type, Index, NewObjDesc, WalkState); |
| 714 | |
| 715 | /* Remove local reference if we copied the object above */ |
| 716 | |
| 717 | if (NewObjDesc != ObjDesc) |
| 718 | { |
| 719 | AcpiUtRemoveReference (NewObjDesc); |
| 720 | } |
| 721 | |
| 722 | return_ACPI_STATUS (Status); |
| 723 | } |
| 724 | |
| 725 | |
| 726 | #ifdef ACPI_OBSOLETE_FUNCTIONS |
| 727 | /******************************************************************************* |
| 728 | * |
| 729 | * FUNCTION: AcpiDsMethodDataGetType |
| 730 | * |
| 731 | * PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP |
| 732 | * Index - Which Local or Arg whose type to get |
| 733 | * WalkState - Current walk state object |
| 734 | * |
| 735 | * RETURN: Data type of current value of the selected Arg or Local |
| 736 | * |
| 737 | * DESCRIPTION: Get the type of the object stored in the Local or Arg |
| 738 | * |
| 739 | ******************************************************************************/ |
| 740 | |
| 741 | ACPI_OBJECT_TYPE |
| 742 | AcpiDsMethodDataGetType ( |
| 743 | UINT16 Opcode, |
| 744 | UINT32 Index, |
| 745 | ACPI_WALK_STATE *WalkState) |
| 746 | { |
| 747 | ACPI_STATUS Status; |
| 748 | ACPI_NAMESPACE_NODE *Node; |
| 749 | ACPI_OPERAND_OBJECT *Object; |
| 750 | |
| 751 | |
| 752 | ACPI_FUNCTION_TRACE (DsMethodDataGetType); |
| 753 | |
| 754 | |
| 755 | /* Get the namespace node for the arg/local */ |
| 756 | |
| 757 | Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node); |
| 758 | if (ACPI_FAILURE (Status)) |
| 759 | { |
| 760 | return_VALUE ((ACPI_TYPE_NOT_FOUND)); |
| 761 | } |
| 762 | |
| 763 | /* Get the object */ |
| 764 | |
| 765 | Object = AcpiNsGetAttachedObject (Node); |
| 766 | if (!Object) |
| 767 | { |
| 768 | /* Uninitialized local/arg, return TYPE_ANY */ |
| 769 | |
| 770 | return_VALUE (ACPI_TYPE_ANY); |
| 771 | } |
| 772 | |
| 773 | /* Get the object type */ |
| 774 | |
| 775 | return_VALUE (Object->Type); |
| 776 | } |
| 777 | #endif |
| 778 | |