| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: dsobject - Dispatcher object management 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 "acparser.h" |
| 47 | #include "amlcode.h" |
| 48 | #include "acdispat.h" |
| 49 | #include "acnamesp.h" |
| 50 | #include "acinterp.h" |
| 51 | |
| 52 | #define _COMPONENT ACPI_DISPATCHER |
| 53 | ACPI_MODULE_NAME ("dsobject" ) |
| 54 | |
| 55 | /* Local prototypes */ |
| 56 | |
| 57 | static ACPI_STATUS |
| 58 | AcpiDsBuildInternalObject ( |
| 59 | ACPI_WALK_STATE *WalkState, |
| 60 | ACPI_PARSE_OBJECT *Op, |
| 61 | ACPI_OPERAND_OBJECT **ObjDescPtr); |
| 62 | |
| 63 | |
| 64 | #ifndef ACPI_NO_METHOD_EXECUTION |
| 65 | /******************************************************************************* |
| 66 | * |
| 67 | * FUNCTION: AcpiDsBuildInternalObject |
| 68 | * |
| 69 | * PARAMETERS: WalkState - Current walk state |
| 70 | * Op - Parser object to be translated |
| 71 | * ObjDescPtr - Where the ACPI internal object is returned |
| 72 | * |
| 73 | * RETURN: Status |
| 74 | * |
| 75 | * DESCRIPTION: Translate a parser Op object to the equivalent namespace object |
| 76 | * Simple objects are any objects other than a package object! |
| 77 | * |
| 78 | ******************************************************************************/ |
| 79 | |
| 80 | static ACPI_STATUS |
| 81 | AcpiDsBuildInternalObject ( |
| 82 | ACPI_WALK_STATE *WalkState, |
| 83 | ACPI_PARSE_OBJECT *Op, |
| 84 | ACPI_OPERAND_OBJECT **ObjDescPtr) |
| 85 | { |
| 86 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 87 | ACPI_STATUS Status; |
| 88 | ACPI_OBJECT_TYPE Type; |
| 89 | |
| 90 | |
| 91 | ACPI_FUNCTION_TRACE (DsBuildInternalObject); |
| 92 | |
| 93 | |
| 94 | *ObjDescPtr = NULL; |
| 95 | if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP) |
| 96 | { |
| 97 | /* |
| 98 | * This is a named object reference. If this name was |
| 99 | * previously looked up in the namespace, it was stored in this op. |
| 100 | * Otherwise, go ahead and look it up now |
| 101 | */ |
| 102 | if (!Op->Common.Node) |
| 103 | { |
| 104 | Status = AcpiNsLookup (WalkState->ScopeInfo, |
| 105 | Op->Common.Value.String, |
| 106 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, |
| 107 | ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, |
| 108 | ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &(Op->Common.Node))); |
| 109 | if (ACPI_FAILURE (Status)) |
| 110 | { |
| 111 | /* Check if we are resolving a named reference within a package */ |
| 112 | |
| 113 | if ((Status == AE_NOT_FOUND) && (AcpiGbl_EnableInterpreterSlack) && |
| 114 | |
| 115 | ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || |
| 116 | (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))) |
| 117 | { |
| 118 | /* |
| 119 | * We didn't find the target and we are populating elements |
| 120 | * of a package - ignore if slack enabled. Some ASL code |
| 121 | * contains dangling invalid references in packages and |
| 122 | * expects that no exception will be issued. Leave the |
| 123 | * element as a null element. It cannot be used, but it |
| 124 | * can be overwritten by subsequent ASL code - this is |
| 125 | * typically the case. |
| 126 | */ |
| 127 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| 128 | "Ignoring unresolved reference in package [%4.4s]\n" , |
| 129 | WalkState->ScopeInfo->Scope.Node->Name.Ascii)); |
| 130 | |
| 131 | return_ACPI_STATUS (AE_OK); |
| 132 | } |
| 133 | else |
| 134 | { |
| 135 | ACPI_ERROR_NAMESPACE (Op->Common.Value.String, Status); |
| 136 | } |
| 137 | |
| 138 | return_ACPI_STATUS (Status); |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | /* Special object resolution for elements of a package */ |
| 143 | |
| 144 | if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || |
| 145 | (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)) |
| 146 | { |
| 147 | /* |
| 148 | * Attempt to resolve the node to a value before we insert it into |
| 149 | * the package. If this is a reference to a common data type, |
| 150 | * resolve it immediately. According to the ACPI spec, package |
| 151 | * elements can only be "data objects" or method references. |
| 152 | * Attempt to resolve to an Integer, Buffer, String or Package. |
| 153 | * If cannot, return the named reference (for things like Devices, |
| 154 | * Methods, etc.) Buffer Fields and Fields will resolve to simple |
| 155 | * objects (int/buf/str/pkg). |
| 156 | * |
| 157 | * NOTE: References to things like Devices, Methods, Mutexes, etc. |
| 158 | * will remain as named references. This behavior is not described |
| 159 | * in the ACPI spec, but it appears to be an oversight. |
| 160 | */ |
| 161 | ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Op->Common.Node); |
| 162 | |
| 163 | Status = AcpiExResolveNodeToValue ( |
| 164 | ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc), |
| 165 | WalkState); |
| 166 | if (ACPI_FAILURE (Status)) |
| 167 | { |
| 168 | return_ACPI_STATUS (Status); |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * Special handling for Alias objects. We need to setup the type |
| 173 | * and the Op->Common.Node to point to the Alias target. Note, |
| 174 | * Alias has at most one level of indirection internally. |
| 175 | */ |
| 176 | Type = Op->Common.Node->Type; |
| 177 | if (Type == ACPI_TYPE_LOCAL_ALIAS) |
| 178 | { |
| 179 | Type = ObjDesc->Common.Type; |
| 180 | Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, |
| 181 | Op->Common.Node->Object); |
| 182 | } |
| 183 | |
| 184 | switch (Type) |
| 185 | { |
| 186 | /* |
| 187 | * For these types, we need the actual node, not the subobject. |
| 188 | * However, the subobject did not get an extra reference count above. |
| 189 | * |
| 190 | * TBD: should ExResolveNodeToValue be changed to fix this? |
| 191 | */ |
| 192 | case ACPI_TYPE_DEVICE: |
| 193 | case ACPI_TYPE_THERMAL: |
| 194 | |
| 195 | AcpiUtAddReference (Op->Common.Node->Object); |
| 196 | |
| 197 | /*lint -fallthrough */ |
| 198 | /* |
| 199 | * For these types, we need the actual node, not the subobject. |
| 200 | * The subobject got an extra reference count in ExResolveNodeToValue. |
| 201 | */ |
| 202 | case ACPI_TYPE_MUTEX: |
| 203 | case ACPI_TYPE_METHOD: |
| 204 | case ACPI_TYPE_POWER: |
| 205 | case ACPI_TYPE_PROCESSOR: |
| 206 | case ACPI_TYPE_EVENT: |
| 207 | case ACPI_TYPE_REGION: |
| 208 | |
| 209 | /* We will create a reference object for these types below */ |
| 210 | break; |
| 211 | |
| 212 | default: |
| 213 | /* |
| 214 | * All other types - the node was resolved to an actual |
| 215 | * object, we are done. |
| 216 | */ |
| 217 | goto Exit; |
| 218 | } |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | /* Create and init a new internal ACPI object */ |
| 223 | |
| 224 | ObjDesc = AcpiUtCreateInternalObject ( |
| 225 | (AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode))->ObjectType); |
| 226 | if (!ObjDesc) |
| 227 | { |
| 228 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 229 | } |
| 230 | |
| 231 | Status = AcpiDsInitObjectFromOp ( |
| 232 | WalkState, Op, Op->Common.AmlOpcode, &ObjDesc); |
| 233 | if (ACPI_FAILURE (Status)) |
| 234 | { |
| 235 | AcpiUtRemoveReference (ObjDesc); |
| 236 | return_ACPI_STATUS (Status); |
| 237 | } |
| 238 | |
| 239 | Exit: |
| 240 | *ObjDescPtr = ObjDesc; |
| 241 | return_ACPI_STATUS (Status); |
| 242 | } |
| 243 | |
| 244 | |
| 245 | /******************************************************************************* |
| 246 | * |
| 247 | * FUNCTION: AcpiDsBuildInternalBufferObj |
| 248 | * |
| 249 | * PARAMETERS: WalkState - Current walk state |
| 250 | * Op - Parser object to be translated |
| 251 | * BufferLength - Length of the buffer |
| 252 | * ObjDescPtr - Where the ACPI internal object is returned |
| 253 | * |
| 254 | * RETURN: Status |
| 255 | * |
| 256 | * DESCRIPTION: Translate a parser Op package object to the equivalent |
| 257 | * namespace object |
| 258 | * |
| 259 | ******************************************************************************/ |
| 260 | |
| 261 | ACPI_STATUS |
| 262 | AcpiDsBuildInternalBufferObj ( |
| 263 | ACPI_WALK_STATE *WalkState, |
| 264 | ACPI_PARSE_OBJECT *Op, |
| 265 | UINT32 BufferLength, |
| 266 | ACPI_OPERAND_OBJECT **ObjDescPtr) |
| 267 | { |
| 268 | ACPI_PARSE_OBJECT *Arg; |
| 269 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 270 | ACPI_PARSE_OBJECT *ByteList; |
| 271 | UINT32 ByteListLength = 0; |
| 272 | |
| 273 | |
| 274 | ACPI_FUNCTION_TRACE (DsBuildInternalBufferObj); |
| 275 | |
| 276 | |
| 277 | /* |
| 278 | * If we are evaluating a Named buffer object "Name (xxxx, Buffer)". |
| 279 | * The buffer object already exists (from the NS node), otherwise it must |
| 280 | * be created. |
| 281 | */ |
| 282 | ObjDesc = *ObjDescPtr; |
| 283 | if (!ObjDesc) |
| 284 | { |
| 285 | /* Create a new buffer object */ |
| 286 | |
| 287 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER); |
| 288 | *ObjDescPtr = ObjDesc; |
| 289 | if (!ObjDesc) |
| 290 | { |
| 291 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | /* |
| 296 | * Second arg is the buffer data (optional) ByteList can be either |
| 297 | * individual bytes or a string initializer. In either case, a |
| 298 | * ByteList appears in the AML. |
| 299 | */ |
| 300 | Arg = Op->Common.Value.Arg; /* skip first arg */ |
| 301 | |
| 302 | ByteList = Arg->Named.Next; |
| 303 | if (ByteList) |
| 304 | { |
| 305 | if (ByteList->Common.AmlOpcode != AML_INT_BYTELIST_OP) |
| 306 | { |
| 307 | ACPI_ERROR ((AE_INFO, |
| 308 | "Expecting bytelist, found AML opcode 0x%X in op %p" , |
| 309 | ByteList->Common.AmlOpcode, ByteList)); |
| 310 | |
| 311 | AcpiUtRemoveReference (ObjDesc); |
| 312 | return (AE_TYPE); |
| 313 | } |
| 314 | |
| 315 | ByteListLength = (UINT32) ByteList->Common.Value.Integer; |
| 316 | } |
| 317 | |
| 318 | /* |
| 319 | * The buffer length (number of bytes) will be the larger of: |
| 320 | * 1) The specified buffer length and |
| 321 | * 2) The length of the initializer byte list |
| 322 | */ |
| 323 | ObjDesc->Buffer.Length = BufferLength; |
| 324 | if (ByteListLength > BufferLength) |
| 325 | { |
| 326 | ObjDesc->Buffer.Length = ByteListLength; |
| 327 | } |
| 328 | |
| 329 | /* Allocate the buffer */ |
| 330 | |
| 331 | if (ObjDesc->Buffer.Length == 0) |
| 332 | { |
| 333 | ObjDesc->Buffer.Pointer = NULL; |
| 334 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 335 | "Buffer defined with zero length in AML, creating\n" )); |
| 336 | } |
| 337 | else |
| 338 | { |
| 339 | ObjDesc->Buffer.Pointer = |
| 340 | ACPI_ALLOCATE_ZEROED (ObjDesc->Buffer.Length); |
| 341 | if (!ObjDesc->Buffer.Pointer) |
| 342 | { |
| 343 | AcpiUtDeleteObjectDesc (ObjDesc); |
| 344 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 345 | } |
| 346 | |
| 347 | /* Initialize buffer from the ByteList (if present) */ |
| 348 | |
| 349 | if (ByteList) |
| 350 | { |
| 351 | memcpy (ObjDesc->Buffer.Pointer, ByteList->Named.Data, |
| 352 | ByteListLength); |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | ObjDesc->Buffer.Flags |= AOPOBJ_DATA_VALID; |
| 357 | Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc); |
| 358 | return_ACPI_STATUS (AE_OK); |
| 359 | } |
| 360 | |
| 361 | |
| 362 | /******************************************************************************* |
| 363 | * |
| 364 | * FUNCTION: AcpiDsBuildInternalPackageObj |
| 365 | * |
| 366 | * PARAMETERS: WalkState - Current walk state |
| 367 | * Op - Parser object to be translated |
| 368 | * ElementCount - Number of elements in the package - this is |
| 369 | * the NumElements argument to Package() |
| 370 | * ObjDescPtr - Where the ACPI internal object is returned |
| 371 | * |
| 372 | * RETURN: Status |
| 373 | * |
| 374 | * DESCRIPTION: Translate a parser Op package object to the equivalent |
| 375 | * namespace object |
| 376 | * |
| 377 | * NOTE: The number of elements in the package will be always be the NumElements |
| 378 | * count, regardless of the number of elements in the package list. If |
| 379 | * NumElements is smaller, only that many package list elements are used. |
| 380 | * if NumElements is larger, the Package object is padded out with |
| 381 | * objects of type Uninitialized (as per ACPI spec.) |
| 382 | * |
| 383 | * Even though the ASL compilers do not allow NumElements to be smaller |
| 384 | * than the Package list length (for the fixed length package opcode), some |
| 385 | * BIOS code modifies the AML on the fly to adjust the NumElements, and |
| 386 | * this code compensates for that. This also provides compatibility with |
| 387 | * other AML interpreters. |
| 388 | * |
| 389 | ******************************************************************************/ |
| 390 | |
| 391 | ACPI_STATUS |
| 392 | AcpiDsBuildInternalPackageObj ( |
| 393 | ACPI_WALK_STATE *WalkState, |
| 394 | ACPI_PARSE_OBJECT *Op, |
| 395 | UINT32 ElementCount, |
| 396 | ACPI_OPERAND_OBJECT **ObjDescPtr) |
| 397 | { |
| 398 | ACPI_PARSE_OBJECT *Arg; |
| 399 | ACPI_PARSE_OBJECT *Parent; |
| 400 | ACPI_OPERAND_OBJECT *ObjDesc = NULL; |
| 401 | ACPI_STATUS Status = AE_OK; |
| 402 | UINT32 i; |
| 403 | UINT16 Index; |
| 404 | UINT16 ReferenceCount; |
| 405 | |
| 406 | |
| 407 | ACPI_FUNCTION_TRACE (DsBuildInternalPackageObj); |
| 408 | |
| 409 | |
| 410 | /* Find the parent of a possibly nested package */ |
| 411 | |
| 412 | Parent = Op->Common.Parent; |
| 413 | while ((Parent->Common.AmlOpcode == AML_PACKAGE_OP) || |
| 414 | (Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)) |
| 415 | { |
| 416 | Parent = Parent->Common.Parent; |
| 417 | } |
| 418 | |
| 419 | /* |
| 420 | * If we are evaluating a Named package object "Name (xxxx, Package)", |
| 421 | * the package object already exists, otherwise it must be created. |
| 422 | */ |
| 423 | ObjDesc = *ObjDescPtr; |
| 424 | if (!ObjDesc) |
| 425 | { |
| 426 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE); |
| 427 | *ObjDescPtr = ObjDesc; |
| 428 | if (!ObjDesc) |
| 429 | { |
| 430 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 431 | } |
| 432 | |
| 433 | ObjDesc->Package.Node = Parent->Common.Node; |
| 434 | } |
| 435 | |
| 436 | /* |
| 437 | * Allocate the element array (array of pointers to the individual |
| 438 | * objects) based on the NumElements parameter. Add an extra pointer slot |
| 439 | * so that the list is always null terminated. |
| 440 | */ |
| 441 | ObjDesc->Package.Elements = ACPI_ALLOCATE_ZEROED ( |
| 442 | ((ACPI_SIZE) ElementCount + 1) * sizeof (void *)); |
| 443 | |
| 444 | if (!ObjDesc->Package.Elements) |
| 445 | { |
| 446 | AcpiUtDeleteObjectDesc (ObjDesc); |
| 447 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 448 | } |
| 449 | |
| 450 | ObjDesc->Package.Count = ElementCount; |
| 451 | |
| 452 | /* |
| 453 | * Initialize the elements of the package, up to the NumElements count. |
| 454 | * Package is automatically padded with uninitialized (NULL) elements |
| 455 | * if NumElements is greater than the package list length. Likewise, |
| 456 | * Package is truncated if NumElements is less than the list length. |
| 457 | */ |
| 458 | Arg = Op->Common.Value.Arg; |
| 459 | Arg = Arg->Common.Next; |
| 460 | for (i = 0; Arg && (i < ElementCount); i++) |
| 461 | { |
| 462 | if (Arg->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP) |
| 463 | { |
| 464 | if (Arg->Common.Node->Type == ACPI_TYPE_METHOD) |
| 465 | { |
| 466 | /* |
| 467 | * A method reference "looks" to the parser to be a method |
| 468 | * invocation, so we special case it here |
| 469 | */ |
| 470 | Arg->Common.AmlOpcode = AML_INT_NAMEPATH_OP; |
| 471 | Status = AcpiDsBuildInternalObject ( |
| 472 | WalkState, Arg, &ObjDesc->Package.Elements[i]); |
| 473 | } |
| 474 | else |
| 475 | { |
| 476 | /* This package element is already built, just get it */ |
| 477 | |
| 478 | ObjDesc->Package.Elements[i] = |
| 479 | ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Arg->Common.Node); |
| 480 | } |
| 481 | } |
| 482 | else |
| 483 | { |
| 484 | Status = AcpiDsBuildInternalObject ( |
| 485 | WalkState, Arg, &ObjDesc->Package.Elements[i]); |
| 486 | } |
| 487 | |
| 488 | if (*ObjDescPtr) |
| 489 | { |
| 490 | /* Existing package, get existing reference count */ |
| 491 | |
| 492 | ReferenceCount = (*ObjDescPtr)->Common.ReferenceCount; |
| 493 | if (ReferenceCount > 1) |
| 494 | { |
| 495 | /* Make new element ref count match original ref count */ |
| 496 | |
| 497 | for (Index = 0; Index < (ReferenceCount - 1); Index++) |
| 498 | { |
| 499 | AcpiUtAddReference ((ObjDesc->Package.Elements[i])); |
| 500 | } |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | Arg = Arg->Common.Next; |
| 505 | } |
| 506 | |
| 507 | /* Check for match between NumElements and actual length of PackageList */ |
| 508 | |
| 509 | if (Arg) |
| 510 | { |
| 511 | /* |
| 512 | * NumElements was exhausted, but there are remaining elements in the |
| 513 | * PackageList. Truncate the package to NumElements. |
| 514 | * |
| 515 | * Note: technically, this is an error, from ACPI spec: "It is an error |
| 516 | * for NumElements to be less than the number of elements in the |
| 517 | * PackageList". However, we just print a message and |
| 518 | * no exception is returned. This provides Windows compatibility. Some |
| 519 | * BIOSs will alter the NumElements on the fly, creating this type |
| 520 | * of ill-formed package object. |
| 521 | */ |
| 522 | while (Arg) |
| 523 | { |
| 524 | /* |
| 525 | * We must delete any package elements that were created earlier |
| 526 | * and are not going to be used because of the package truncation. |
| 527 | */ |
| 528 | if (Arg->Common.Node) |
| 529 | { |
| 530 | AcpiUtRemoveReference ( |
| 531 | ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Arg->Common.Node)); |
| 532 | Arg->Common.Node = NULL; |
| 533 | } |
| 534 | |
| 535 | /* Find out how many elements there really are */ |
| 536 | |
| 537 | i++; |
| 538 | Arg = Arg->Common.Next; |
| 539 | } |
| 540 | |
| 541 | ACPI_INFO (( |
| 542 | "Actual Package length (%u) is larger than " |
| 543 | "NumElements field (%u), truncated" , |
| 544 | i, ElementCount)); |
| 545 | } |
| 546 | else if (i < ElementCount) |
| 547 | { |
| 548 | /* |
| 549 | * Arg list (elements) was exhausted, but we did not reach NumElements count. |
| 550 | * Note: this is not an error, the package is padded out with NULLs. |
| 551 | */ |
| 552 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| 553 | "Package List length (%u) smaller than NumElements " |
| 554 | "count (%u), padded with null elements\n" , |
| 555 | i, ElementCount)); |
| 556 | } |
| 557 | |
| 558 | ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID; |
| 559 | Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc); |
| 560 | return_ACPI_STATUS (Status); |
| 561 | } |
| 562 | |
| 563 | |
| 564 | /******************************************************************************* |
| 565 | * |
| 566 | * FUNCTION: AcpiDsCreateNode |
| 567 | * |
| 568 | * PARAMETERS: WalkState - Current walk state |
| 569 | * Node - NS Node to be initialized |
| 570 | * Op - Parser object to be translated |
| 571 | * |
| 572 | * RETURN: Status |
| 573 | * |
| 574 | * DESCRIPTION: Create the object to be associated with a namespace node |
| 575 | * |
| 576 | ******************************************************************************/ |
| 577 | |
| 578 | ACPI_STATUS |
| 579 | AcpiDsCreateNode ( |
| 580 | ACPI_WALK_STATE *WalkState, |
| 581 | ACPI_NAMESPACE_NODE *Node, |
| 582 | ACPI_PARSE_OBJECT *Op) |
| 583 | { |
| 584 | ACPI_STATUS Status; |
| 585 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 586 | |
| 587 | |
| 588 | ACPI_FUNCTION_TRACE_PTR (DsCreateNode, Op); |
| 589 | |
| 590 | |
| 591 | /* |
| 592 | * Because of the execution pass through the non-control-method |
| 593 | * parts of the table, we can arrive here twice. Only init |
| 594 | * the named object node the first time through |
| 595 | */ |
| 596 | if (AcpiNsGetAttachedObject (Node)) |
| 597 | { |
| 598 | return_ACPI_STATUS (AE_OK); |
| 599 | } |
| 600 | |
| 601 | if (!Op->Common.Value.Arg) |
| 602 | { |
| 603 | /* No arguments, there is nothing to do */ |
| 604 | |
| 605 | return_ACPI_STATUS (AE_OK); |
| 606 | } |
| 607 | |
| 608 | /* Build an internal object for the argument(s) */ |
| 609 | |
| 610 | Status = AcpiDsBuildInternalObject ( |
| 611 | WalkState, Op->Common.Value.Arg, &ObjDesc); |
| 612 | if (ACPI_FAILURE (Status)) |
| 613 | { |
| 614 | return_ACPI_STATUS (Status); |
| 615 | } |
| 616 | |
| 617 | /* Re-type the object according to its argument */ |
| 618 | |
| 619 | Node->Type = ObjDesc->Common.Type; |
| 620 | |
| 621 | /* Attach obj to node */ |
| 622 | |
| 623 | Status = AcpiNsAttachObject (Node, ObjDesc, Node->Type); |
| 624 | |
| 625 | /* Remove local reference to the object */ |
| 626 | |
| 627 | AcpiUtRemoveReference (ObjDesc); |
| 628 | return_ACPI_STATUS (Status); |
| 629 | } |
| 630 | |
| 631 | #endif /* ACPI_NO_METHOD_EXECUTION */ |
| 632 | |
| 633 | |
| 634 | /******************************************************************************* |
| 635 | * |
| 636 | * FUNCTION: AcpiDsInitObjectFromOp |
| 637 | * |
| 638 | * PARAMETERS: WalkState - Current walk state |
| 639 | * Op - Parser op used to init the internal object |
| 640 | * Opcode - AML opcode associated with the object |
| 641 | * RetObjDesc - Namespace object to be initialized |
| 642 | * |
| 643 | * RETURN: Status |
| 644 | * |
| 645 | * DESCRIPTION: Initialize a namespace object from a parser Op and its |
| 646 | * associated arguments. The namespace object is a more compact |
| 647 | * representation of the Op and its arguments. |
| 648 | * |
| 649 | ******************************************************************************/ |
| 650 | |
| 651 | ACPI_STATUS |
| 652 | AcpiDsInitObjectFromOp ( |
| 653 | ACPI_WALK_STATE *WalkState, |
| 654 | ACPI_PARSE_OBJECT *Op, |
| 655 | UINT16 Opcode, |
| 656 | ACPI_OPERAND_OBJECT **RetObjDesc) |
| 657 | { |
| 658 | const ACPI_OPCODE_INFO *OpInfo; |
| 659 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 660 | ACPI_STATUS Status = AE_OK; |
| 661 | |
| 662 | |
| 663 | ACPI_FUNCTION_TRACE (DsInitObjectFromOp); |
| 664 | |
| 665 | |
| 666 | ObjDesc = *RetObjDesc; |
| 667 | OpInfo = AcpiPsGetOpcodeInfo (Opcode); |
| 668 | if (OpInfo->Class == AML_CLASS_UNKNOWN) |
| 669 | { |
| 670 | /* Unknown opcode */ |
| 671 | |
| 672 | return_ACPI_STATUS (AE_TYPE); |
| 673 | } |
| 674 | |
| 675 | /* Perform per-object initialization */ |
| 676 | |
| 677 | switch (ObjDesc->Common.Type) |
| 678 | { |
| 679 | case ACPI_TYPE_BUFFER: |
| 680 | /* |
| 681 | * Defer evaluation of Buffer TermArg operand |
| 682 | */ |
| 683 | ObjDesc->Buffer.Node = ACPI_CAST_PTR ( |
| 684 | ACPI_NAMESPACE_NODE, WalkState->Operands[0]); |
| 685 | ObjDesc->Buffer.AmlStart = Op->Named.Data; |
| 686 | ObjDesc->Buffer.AmlLength = Op->Named.Length; |
| 687 | break; |
| 688 | |
| 689 | case ACPI_TYPE_PACKAGE: |
| 690 | /* |
| 691 | * Defer evaluation of Package TermArg operand |
| 692 | */ |
| 693 | ObjDesc->Package.Node = ACPI_CAST_PTR ( |
| 694 | ACPI_NAMESPACE_NODE, WalkState->Operands[0]); |
| 695 | ObjDesc->Package.AmlStart = Op->Named.Data; |
| 696 | ObjDesc->Package.AmlLength = Op->Named.Length; |
| 697 | break; |
| 698 | |
| 699 | case ACPI_TYPE_INTEGER: |
| 700 | |
| 701 | switch (OpInfo->Type) |
| 702 | { |
| 703 | case AML_TYPE_CONSTANT: |
| 704 | /* |
| 705 | * Resolve AML Constants here - AND ONLY HERE! |
| 706 | * All constants are integers. |
| 707 | * We mark the integer with a flag that indicates that it started |
| 708 | * life as a constant -- so that stores to constants will perform |
| 709 | * as expected (noop). ZeroOp is used as a placeholder for optional |
| 710 | * target operands. |
| 711 | */ |
| 712 | ObjDesc->Common.Flags = AOPOBJ_AML_CONSTANT; |
| 713 | |
| 714 | switch (Opcode) |
| 715 | { |
| 716 | case AML_ZERO_OP: |
| 717 | |
| 718 | ObjDesc->Integer.Value = 0; |
| 719 | break; |
| 720 | |
| 721 | case AML_ONE_OP: |
| 722 | |
| 723 | ObjDesc->Integer.Value = 1; |
| 724 | break; |
| 725 | |
| 726 | case AML_ONES_OP: |
| 727 | |
| 728 | ObjDesc->Integer.Value = ACPI_UINT64_MAX; |
| 729 | |
| 730 | /* Truncate value if we are executing from a 32-bit ACPI table */ |
| 731 | |
| 732 | #ifndef ACPI_NO_METHOD_EXECUTION |
| 733 | (void) AcpiExTruncateFor32bitTable (ObjDesc); |
| 734 | #endif |
| 735 | break; |
| 736 | |
| 737 | case AML_REVISION_OP: |
| 738 | |
| 739 | ObjDesc->Integer.Value = ACPI_CA_VERSION; |
| 740 | break; |
| 741 | |
| 742 | default: |
| 743 | |
| 744 | ACPI_ERROR ((AE_INFO, |
| 745 | "Unknown constant opcode 0x%X" , Opcode)); |
| 746 | Status = AE_AML_OPERAND_TYPE; |
| 747 | break; |
| 748 | } |
| 749 | break; |
| 750 | |
| 751 | case AML_TYPE_LITERAL: |
| 752 | |
| 753 | ObjDesc->Integer.Value = Op->Common.Value.Integer; |
| 754 | |
| 755 | #ifndef ACPI_NO_METHOD_EXECUTION |
| 756 | if (AcpiExTruncateFor32bitTable (ObjDesc)) |
| 757 | { |
| 758 | /* Warn if we found a 64-bit constant in a 32-bit table */ |
| 759 | |
| 760 | ACPI_WARNING ((AE_INFO, |
| 761 | "Truncated 64-bit constant found in 32-bit table: %8.8X%8.8X => %8.8X" , |
| 762 | ACPI_FORMAT_UINT64 (Op->Common.Value.Integer), |
| 763 | (UINT32) ObjDesc->Integer.Value)); |
| 764 | } |
| 765 | #endif |
| 766 | break; |
| 767 | |
| 768 | default: |
| 769 | |
| 770 | ACPI_ERROR ((AE_INFO, "Unknown Integer type 0x%X" , |
| 771 | OpInfo->Type)); |
| 772 | Status = AE_AML_OPERAND_TYPE; |
| 773 | break; |
| 774 | } |
| 775 | break; |
| 776 | |
| 777 | case ACPI_TYPE_STRING: |
| 778 | |
| 779 | ObjDesc->String.Pointer = Op->Common.Value.String; |
| 780 | ObjDesc->String.Length = (UINT32) strlen (Op->Common.Value.String); |
| 781 | |
| 782 | /* |
| 783 | * The string is contained in the ACPI table, don't ever try |
| 784 | * to delete it |
| 785 | */ |
| 786 | ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER; |
| 787 | break; |
| 788 | |
| 789 | case ACPI_TYPE_METHOD: |
| 790 | break; |
| 791 | |
| 792 | case ACPI_TYPE_LOCAL_REFERENCE: |
| 793 | |
| 794 | switch (OpInfo->Type) |
| 795 | { |
| 796 | case AML_TYPE_LOCAL_VARIABLE: |
| 797 | |
| 798 | /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */ |
| 799 | |
| 800 | ObjDesc->Reference.Value = ((UINT32) Opcode) - AML_LOCAL_OP; |
| 801 | ObjDesc->Reference.Class = ACPI_REFCLASS_LOCAL; |
| 802 | |
| 803 | #ifndef ACPI_NO_METHOD_EXECUTION |
| 804 | Status = AcpiDsMethodDataGetNode (ACPI_REFCLASS_LOCAL, |
| 805 | ObjDesc->Reference.Value, WalkState, |
| 806 | ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, |
| 807 | &ObjDesc->Reference.Object)); |
| 808 | #endif |
| 809 | break; |
| 810 | |
| 811 | case AML_TYPE_METHOD_ARGUMENT: |
| 812 | |
| 813 | /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */ |
| 814 | |
| 815 | ObjDesc->Reference.Value = ((UINT32) Opcode) - AML_ARG_OP; |
| 816 | ObjDesc->Reference.Class = ACPI_REFCLASS_ARG; |
| 817 | |
| 818 | #ifndef ACPI_NO_METHOD_EXECUTION |
| 819 | Status = AcpiDsMethodDataGetNode (ACPI_REFCLASS_ARG, |
| 820 | ObjDesc->Reference.Value, WalkState, |
| 821 | ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, |
| 822 | &ObjDesc->Reference.Object)); |
| 823 | #endif |
| 824 | break; |
| 825 | |
| 826 | default: /* Object name or Debug object */ |
| 827 | |
| 828 | switch (Op->Common.AmlOpcode) |
| 829 | { |
| 830 | case AML_INT_NAMEPATH_OP: |
| 831 | |
| 832 | /* Node was saved in Op */ |
| 833 | |
| 834 | ObjDesc->Reference.Node = Op->Common.Node; |
| 835 | ObjDesc->Reference.Object = Op->Common.Node->Object; |
| 836 | ObjDesc->Reference.Class = ACPI_REFCLASS_NAME; |
| 837 | break; |
| 838 | |
| 839 | case AML_DEBUG_OP: |
| 840 | |
| 841 | ObjDesc->Reference.Class = ACPI_REFCLASS_DEBUG; |
| 842 | break; |
| 843 | |
| 844 | default: |
| 845 | |
| 846 | ACPI_ERROR ((AE_INFO, |
| 847 | "Unimplemented reference type for AML opcode: 0x%4.4X" , Opcode)); |
| 848 | return_ACPI_STATUS (AE_AML_OPERAND_TYPE); |
| 849 | } |
| 850 | break; |
| 851 | } |
| 852 | break; |
| 853 | |
| 854 | default: |
| 855 | |
| 856 | ACPI_ERROR ((AE_INFO, "Unimplemented data type: 0x%X" , |
| 857 | ObjDesc->Common.Type)); |
| 858 | |
| 859 | Status = AE_AML_OPERAND_TYPE; |
| 860 | break; |
| 861 | } |
| 862 | |
| 863 | return_ACPI_STATUS (Status); |
| 864 | } |
| 865 | |