| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: psloop - Main AML parse loop |
| 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 | /* |
| 45 | * Parse the AML and build an operation tree as most interpreters, (such as |
| 46 | * Perl) do. Parsing is done by hand rather than with a YACC generated parser |
| 47 | * to tightly constrain stack and dynamic memory usage. Parsing is kept |
| 48 | * flexible and the code fairly compact by parsing based on a list of AML |
| 49 | * opcode templates in AmlOpInfo[]. |
| 50 | */ |
| 51 | |
| 52 | #include "acpi.h" |
| 53 | #include "accommon.h" |
| 54 | #include "acinterp.h" |
| 55 | #include "acparser.h" |
| 56 | #include "acdispat.h" |
| 57 | #include "amlcode.h" |
| 58 | |
| 59 | #define _COMPONENT ACPI_PARSER |
| 60 | ACPI_MODULE_NAME ("psloop" ) |
| 61 | |
| 62 | |
| 63 | /* Local prototypes */ |
| 64 | |
| 65 | static ACPI_STATUS |
| 66 | AcpiPsGetArguments ( |
| 67 | ACPI_WALK_STATE *WalkState, |
| 68 | UINT8 *AmlOpStart, |
| 69 | ACPI_PARSE_OBJECT *Op); |
| 70 | |
| 71 | static void |
| 72 | AcpiPsLinkModuleCode ( |
| 73 | ACPI_PARSE_OBJECT *ParentOp, |
| 74 | UINT8 *AmlStart, |
| 75 | UINT32 AmlLength, |
| 76 | ACPI_OWNER_ID OwnerId); |
| 77 | |
| 78 | |
| 79 | /******************************************************************************* |
| 80 | * |
| 81 | * FUNCTION: AcpiPsGetArguments |
| 82 | * |
| 83 | * PARAMETERS: WalkState - Current state |
| 84 | * AmlOpStart - Op start in AML |
| 85 | * Op - Current Op |
| 86 | * |
| 87 | * RETURN: Status |
| 88 | * |
| 89 | * DESCRIPTION: Get arguments for passed Op. |
| 90 | * |
| 91 | ******************************************************************************/ |
| 92 | |
| 93 | static ACPI_STATUS |
| 94 | AcpiPsGetArguments ( |
| 95 | ACPI_WALK_STATE *WalkState, |
| 96 | UINT8 *AmlOpStart, |
| 97 | ACPI_PARSE_OBJECT *Op) |
| 98 | { |
| 99 | ACPI_STATUS Status = AE_OK; |
| 100 | ACPI_PARSE_OBJECT *Arg = NULL; |
| 101 | const ACPI_OPCODE_INFO *OpInfo; |
| 102 | |
| 103 | |
| 104 | ACPI_FUNCTION_TRACE_PTR (PsGetArguments, WalkState); |
| 105 | |
| 106 | |
| 107 | switch (Op->Common.AmlOpcode) |
| 108 | { |
| 109 | case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ |
| 110 | case AML_WORD_OP: /* AML_WORDDATA_ARG */ |
| 111 | case AML_DWORD_OP: /* AML_DWORDATA_ARG */ |
| 112 | case AML_QWORD_OP: /* AML_QWORDATA_ARG */ |
| 113 | case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ |
| 114 | |
| 115 | /* Fill in constant or string argument directly */ |
| 116 | |
| 117 | AcpiPsGetNextSimpleArg (&(WalkState->ParserState), |
| 118 | GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), Op); |
| 119 | break; |
| 120 | |
| 121 | case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ |
| 122 | |
| 123 | Status = AcpiPsGetNextNamepath (WalkState, |
| 124 | &(WalkState->ParserState), Op, ACPI_POSSIBLE_METHOD_CALL); |
| 125 | if (ACPI_FAILURE (Status)) |
| 126 | { |
| 127 | return_ACPI_STATUS (Status); |
| 128 | } |
| 129 | |
| 130 | WalkState->ArgTypes = 0; |
| 131 | break; |
| 132 | |
| 133 | default: |
| 134 | /* |
| 135 | * Op is not a constant or string, append each argument to the Op |
| 136 | */ |
| 137 | while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) && |
| 138 | !WalkState->ArgCount) |
| 139 | { |
| 140 | WalkState->Aml = WalkState->ParserState.Aml; |
| 141 | |
| 142 | Status = AcpiPsGetNextArg (WalkState, &(WalkState->ParserState), |
| 143 | GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), &Arg); |
| 144 | if (ACPI_FAILURE (Status)) |
| 145 | { |
| 146 | return_ACPI_STATUS (Status); |
| 147 | } |
| 148 | |
| 149 | if (Arg) |
| 150 | { |
| 151 | AcpiPsAppendArg (Op, Arg); |
| 152 | } |
| 153 | |
| 154 | INCREMENT_ARG_LIST (WalkState->ArgTypes); |
| 155 | } |
| 156 | |
| 157 | |
| 158 | /* |
| 159 | * Handle executable code at "module-level". This refers to |
| 160 | * executable opcodes that appear outside of any control method. |
| 161 | */ |
| 162 | if ((WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2) && |
| 163 | ((WalkState->ParseFlags & ACPI_PARSE_DISASSEMBLE) == 0)) |
| 164 | { |
| 165 | /* |
| 166 | * We want to skip If/Else/While constructs during Pass1 because we |
| 167 | * want to actually conditionally execute the code during Pass2. |
| 168 | * |
| 169 | * Except for disassembly, where we always want to walk the |
| 170 | * If/Else/While packages |
| 171 | */ |
| 172 | switch (Op->Common.AmlOpcode) |
| 173 | { |
| 174 | case AML_IF_OP: |
| 175 | case AML_ELSE_OP: |
| 176 | case AML_WHILE_OP: |
| 177 | /* |
| 178 | * Currently supported module-level opcodes are: |
| 179 | * IF/ELSE/WHILE. These appear to be the most common, |
| 180 | * and easiest to support since they open an AML |
| 181 | * package. |
| 182 | */ |
| 183 | if (WalkState->PassNumber == ACPI_IMODE_LOAD_PASS1) |
| 184 | { |
| 185 | AcpiPsLinkModuleCode (Op->Common.Parent, AmlOpStart, |
| 186 | (UINT32) (WalkState->ParserState.PkgEnd - AmlOpStart), |
| 187 | WalkState->OwnerId); |
| 188 | } |
| 189 | |
| 190 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, |
| 191 | "Pass1: Skipping an If/Else/While body\n" )); |
| 192 | |
| 193 | /* Skip body of if/else/while in pass 1 */ |
| 194 | |
| 195 | WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; |
| 196 | WalkState->ArgCount = 0; |
| 197 | break; |
| 198 | |
| 199 | default: |
| 200 | /* |
| 201 | * Check for an unsupported executable opcode at module |
| 202 | * level. We must be in PASS1, the parent must be a SCOPE, |
| 203 | * The opcode class must be EXECUTE, and the opcode must |
| 204 | * not be an argument to another opcode. |
| 205 | */ |
| 206 | if ((WalkState->PassNumber == ACPI_IMODE_LOAD_PASS1) && |
| 207 | (Op->Common.Parent->Common.AmlOpcode == AML_SCOPE_OP)) |
| 208 | { |
| 209 | OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); |
| 210 | if ((OpInfo->Class == AML_CLASS_EXECUTE) && |
| 211 | (!Arg)) |
| 212 | { |
| 213 | ACPI_WARNING ((AE_INFO, |
| 214 | "Unsupported module-level executable opcode " |
| 215 | "0x%.2X at table offset 0x%.4X" , |
| 216 | Op->Common.AmlOpcode, |
| 217 | (UINT32) (ACPI_PTR_DIFF (AmlOpStart, |
| 218 | WalkState->ParserState.AmlStart) + |
| 219 | sizeof (ACPI_TABLE_HEADER)))); |
| 220 | } |
| 221 | } |
| 222 | break; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | /* Special processing for certain opcodes */ |
| 227 | |
| 228 | switch (Op->Common.AmlOpcode) |
| 229 | { |
| 230 | case AML_METHOD_OP: |
| 231 | /* |
| 232 | * Skip parsing of control method because we don't have enough |
| 233 | * info in the first pass to parse it correctly. |
| 234 | * |
| 235 | * Save the length and address of the body |
| 236 | */ |
| 237 | Op->Named.Data = WalkState->ParserState.Aml; |
| 238 | Op->Named.Length = (UINT32) |
| 239 | (WalkState->ParserState.PkgEnd - WalkState->ParserState.Aml); |
| 240 | |
| 241 | /* Skip body of method */ |
| 242 | |
| 243 | WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; |
| 244 | WalkState->ArgCount = 0; |
| 245 | break; |
| 246 | |
| 247 | case AML_BUFFER_OP: |
| 248 | case AML_PACKAGE_OP: |
| 249 | case AML_VAR_PACKAGE_OP: |
| 250 | |
| 251 | if ((Op->Common.Parent) && |
| 252 | (Op->Common.Parent->Common.AmlOpcode == AML_NAME_OP) && |
| 253 | (WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2)) |
| 254 | { |
| 255 | /* |
| 256 | * Skip parsing of Buffers and Packages because we don't have |
| 257 | * enough info in the first pass to parse them correctly. |
| 258 | */ |
| 259 | Op->Named.Data = AmlOpStart; |
| 260 | Op->Named.Length = (UINT32) |
| 261 | (WalkState->ParserState.PkgEnd - AmlOpStart); |
| 262 | |
| 263 | /* Skip body */ |
| 264 | |
| 265 | WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; |
| 266 | WalkState->ArgCount = 0; |
| 267 | } |
| 268 | break; |
| 269 | |
| 270 | case AML_WHILE_OP: |
| 271 | |
| 272 | if (WalkState->ControlState) |
| 273 | { |
| 274 | WalkState->ControlState->Control.PackageEnd = |
| 275 | WalkState->ParserState.PkgEnd; |
| 276 | } |
| 277 | break; |
| 278 | |
| 279 | default: |
| 280 | |
| 281 | /* No action for all other opcodes */ |
| 282 | |
| 283 | break; |
| 284 | } |
| 285 | |
| 286 | break; |
| 287 | } |
| 288 | |
| 289 | return_ACPI_STATUS (AE_OK); |
| 290 | } |
| 291 | |
| 292 | |
| 293 | /******************************************************************************* |
| 294 | * |
| 295 | * FUNCTION: AcpiPsLinkModuleCode |
| 296 | * |
| 297 | * PARAMETERS: ParentOp - Parent parser op |
| 298 | * AmlStart - Pointer to the AML |
| 299 | * AmlLength - Length of executable AML |
| 300 | * OwnerId - OwnerId of module level code |
| 301 | * |
| 302 | * RETURN: None. |
| 303 | * |
| 304 | * DESCRIPTION: Wrap the module-level code with a method object and link the |
| 305 | * object to the global list. Note, the mutex field of the method |
| 306 | * object is used to link multiple module-level code objects. |
| 307 | * |
| 308 | ******************************************************************************/ |
| 309 | |
| 310 | static void |
| 311 | AcpiPsLinkModuleCode ( |
| 312 | ACPI_PARSE_OBJECT *ParentOp, |
| 313 | UINT8 *AmlStart, |
| 314 | UINT32 AmlLength, |
| 315 | ACPI_OWNER_ID OwnerId) |
| 316 | { |
| 317 | ACPI_OPERAND_OBJECT *Prev; |
| 318 | ACPI_OPERAND_OBJECT *Next; |
| 319 | ACPI_OPERAND_OBJECT *MethodObj; |
| 320 | ACPI_NAMESPACE_NODE *ParentNode; |
| 321 | |
| 322 | |
| 323 | ACPI_FUNCTION_TRACE (PsLinkModuleCode); |
| 324 | |
| 325 | |
| 326 | /* Get the tail of the list */ |
| 327 | |
| 328 | Prev = Next = AcpiGbl_ModuleCodeList; |
| 329 | while (Next) |
| 330 | { |
| 331 | Prev = Next; |
| 332 | Next = Next->Method.Mutex; |
| 333 | } |
| 334 | |
| 335 | /* |
| 336 | * Insert the module level code into the list. Merge it if it is |
| 337 | * adjacent to the previous element. |
| 338 | */ |
| 339 | if (!Prev || |
| 340 | ((Prev->Method.AmlStart + Prev->Method.AmlLength) != AmlStart)) |
| 341 | { |
| 342 | /* Create, initialize, and link a new temporary method object */ |
| 343 | |
| 344 | MethodObj = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); |
| 345 | if (!MethodObj) |
| 346 | { |
| 347 | return_VOID; |
| 348 | } |
| 349 | |
| 350 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, |
| 351 | "Create/Link new code block: %p\n" , MethodObj)); |
| 352 | |
| 353 | if (ParentOp->Common.Node) |
| 354 | { |
| 355 | ParentNode = ParentOp->Common.Node; |
| 356 | } |
| 357 | else |
| 358 | { |
| 359 | ParentNode = AcpiGbl_RootNode; |
| 360 | } |
| 361 | |
| 362 | MethodObj->Method.AmlStart = AmlStart; |
| 363 | MethodObj->Method.AmlLength = AmlLength; |
| 364 | MethodObj->Method.OwnerId = OwnerId; |
| 365 | MethodObj->Method.InfoFlags |= ACPI_METHOD_MODULE_LEVEL; |
| 366 | |
| 367 | /* |
| 368 | * Save the parent node in NextObject. This is cheating, but we |
| 369 | * don't want to expand the method object. |
| 370 | */ |
| 371 | MethodObj->Method.NextObject = |
| 372 | ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParentNode); |
| 373 | |
| 374 | if (!Prev) |
| 375 | { |
| 376 | AcpiGbl_ModuleCodeList = MethodObj; |
| 377 | } |
| 378 | else |
| 379 | { |
| 380 | Prev->Method.Mutex = MethodObj; |
| 381 | } |
| 382 | } |
| 383 | else |
| 384 | { |
| 385 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, |
| 386 | "Appending to existing code block: %p\n" , Prev)); |
| 387 | |
| 388 | Prev->Method.AmlLength += AmlLength; |
| 389 | } |
| 390 | |
| 391 | return_VOID; |
| 392 | } |
| 393 | |
| 394 | /******************************************************************************* |
| 395 | * |
| 396 | * FUNCTION: AcpiPsParseLoop |
| 397 | * |
| 398 | * PARAMETERS: WalkState - Current state |
| 399 | * |
| 400 | * RETURN: Status |
| 401 | * |
| 402 | * DESCRIPTION: Parse AML (pointed to by the current parser state) and return |
| 403 | * a tree of ops. |
| 404 | * |
| 405 | ******************************************************************************/ |
| 406 | |
| 407 | ACPI_STATUS |
| 408 | AcpiPsParseLoop ( |
| 409 | ACPI_WALK_STATE *WalkState) |
| 410 | { |
| 411 | ACPI_STATUS Status = AE_OK; |
| 412 | ACPI_PARSE_OBJECT *Op = NULL; /* current op */ |
| 413 | ACPI_PARSE_STATE *ParserState; |
| 414 | UINT8 *AmlOpStart = NULL; |
| 415 | |
| 416 | |
| 417 | ACPI_FUNCTION_TRACE_PTR (PsParseLoop, WalkState); |
| 418 | |
| 419 | |
| 420 | if (WalkState->DescendingCallback == NULL) |
| 421 | { |
| 422 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 423 | } |
| 424 | |
| 425 | ParserState = &WalkState->ParserState; |
| 426 | WalkState->ArgTypes = 0; |
| 427 | |
| 428 | #if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) |
| 429 | |
| 430 | if (WalkState->WalkType & ACPI_WALK_METHOD_RESTART) |
| 431 | { |
| 432 | /* We are restarting a preempted control method */ |
| 433 | |
| 434 | if (AcpiPsHasCompletedScope (ParserState)) |
| 435 | { |
| 436 | /* |
| 437 | * We must check if a predicate to an IF or WHILE statement |
| 438 | * was just completed |
| 439 | */ |
| 440 | if ((ParserState->Scope->ParseScope.Op) && |
| 441 | ((ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_IF_OP) || |
| 442 | (ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_WHILE_OP)) && |
| 443 | (WalkState->ControlState) && |
| 444 | (WalkState->ControlState->Common.State == |
| 445 | ACPI_CONTROL_PREDICATE_EXECUTING)) |
| 446 | { |
| 447 | /* |
| 448 | * A predicate was just completed, get the value of the |
| 449 | * predicate and branch based on that value |
| 450 | */ |
| 451 | WalkState->Op = NULL; |
| 452 | Status = AcpiDsGetPredicateValue (WalkState, ACPI_TO_POINTER (TRUE)); |
| 453 | if (ACPI_FAILURE (Status) && |
| 454 | ((Status & AE_CODE_MASK) != AE_CODE_CONTROL)) |
| 455 | { |
| 456 | if (Status == AE_AML_NO_RETURN_VALUE) |
| 457 | { |
| 458 | ACPI_EXCEPTION ((AE_INFO, Status, |
| 459 | "Invoked method did not return a value" )); |
| 460 | } |
| 461 | |
| 462 | ACPI_EXCEPTION ((AE_INFO, Status, "GetPredicate Failed" )); |
| 463 | return_ACPI_STATUS (Status); |
| 464 | } |
| 465 | |
| 466 | Status = AcpiPsNextParseState (WalkState, Op, Status); |
| 467 | } |
| 468 | |
| 469 | AcpiPsPopScope (ParserState, &Op, |
| 470 | &WalkState->ArgTypes, &WalkState->ArgCount); |
| 471 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n" , Op)); |
| 472 | } |
| 473 | else if (WalkState->PrevOp) |
| 474 | { |
| 475 | /* We were in the middle of an op */ |
| 476 | |
| 477 | Op = WalkState->PrevOp; |
| 478 | WalkState->ArgTypes = WalkState->PrevArgTypes; |
| 479 | } |
| 480 | } |
| 481 | #endif |
| 482 | |
| 483 | /* Iterative parsing loop, while there is more AML to process: */ |
| 484 | |
| 485 | while ((ParserState->Aml < ParserState->AmlEnd) || (Op)) |
| 486 | { |
| 487 | AmlOpStart = ParserState->Aml; |
| 488 | if (!Op) |
| 489 | { |
| 490 | Status = AcpiPsCreateOp (WalkState, AmlOpStart, &Op); |
| 491 | if (ACPI_FAILURE (Status)) |
| 492 | { |
| 493 | if (Status == AE_CTRL_PARSE_CONTINUE) |
| 494 | { |
| 495 | continue; |
| 496 | } |
| 497 | |
| 498 | if (Status == AE_CTRL_PARSE_PENDING) |
| 499 | { |
| 500 | Status = AE_OK; |
| 501 | } |
| 502 | |
| 503 | if (Status == AE_CTRL_TERMINATE) |
| 504 | { |
| 505 | return_ACPI_STATUS (Status); |
| 506 | } |
| 507 | |
| 508 | Status = AcpiPsCompleteOp (WalkState, &Op, Status); |
| 509 | if (ACPI_FAILURE (Status)) |
| 510 | { |
| 511 | return_ACPI_STATUS (Status); |
| 512 | } |
| 513 | |
| 514 | continue; |
| 515 | } |
| 516 | |
| 517 | AcpiExStartTraceOpcode (Op, WalkState); |
| 518 | } |
| 519 | |
| 520 | |
| 521 | /* |
| 522 | * Start ArgCount at zero because we don't know if there are |
| 523 | * any args yet |
| 524 | */ |
| 525 | WalkState->ArgCount = 0; |
| 526 | |
| 527 | /* Are there any arguments that must be processed? */ |
| 528 | |
| 529 | if (WalkState->ArgTypes) |
| 530 | { |
| 531 | /* Get arguments */ |
| 532 | |
| 533 | Status = AcpiPsGetArguments (WalkState, AmlOpStart, Op); |
| 534 | if (ACPI_FAILURE (Status)) |
| 535 | { |
| 536 | Status = AcpiPsCompleteOp (WalkState, &Op, Status); |
| 537 | if (ACPI_FAILURE (Status)) |
| 538 | { |
| 539 | return_ACPI_STATUS (Status); |
| 540 | } |
| 541 | |
| 542 | continue; |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | /* Check for arguments that need to be processed */ |
| 547 | |
| 548 | if (WalkState->ArgCount) |
| 549 | { |
| 550 | /* |
| 551 | * There are arguments (complex ones), push Op and |
| 552 | * prepare for argument |
| 553 | */ |
| 554 | Status = AcpiPsPushScope (ParserState, Op, |
| 555 | WalkState->ArgTypes, WalkState->ArgCount); |
| 556 | if (ACPI_FAILURE (Status)) |
| 557 | { |
| 558 | Status = AcpiPsCompleteOp (WalkState, &Op, Status); |
| 559 | if (ACPI_FAILURE (Status)) |
| 560 | { |
| 561 | return_ACPI_STATUS (Status); |
| 562 | } |
| 563 | |
| 564 | continue; |
| 565 | } |
| 566 | |
| 567 | Op = NULL; |
| 568 | continue; |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | * All arguments have been processed -- Op is complete, |
| 573 | * prepare for next |
| 574 | */ |
| 575 | WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); |
| 576 | if (WalkState->OpInfo->Flags & AML_NAMED) |
| 577 | { |
| 578 | if (Op->Common.AmlOpcode == AML_REGION_OP || |
| 579 | Op->Common.AmlOpcode == AML_DATA_REGION_OP) |
| 580 | { |
| 581 | /* |
| 582 | * Skip parsing of control method or opregion body, |
| 583 | * because we don't have enough info in the first pass |
| 584 | * to parse them correctly. |
| 585 | * |
| 586 | * Completed parsing an OpRegion declaration, we now |
| 587 | * know the length. |
| 588 | */ |
| 589 | Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | if (WalkState->OpInfo->Flags & AML_CREATE) |
| 594 | { |
| 595 | /* |
| 596 | * Backup to beginning of CreateXXXfield declaration (1 for |
| 597 | * Opcode) |
| 598 | * |
| 599 | * BodyLength is unknown until we parse the body |
| 600 | */ |
| 601 | Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); |
| 602 | } |
| 603 | |
| 604 | if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP) |
| 605 | { |
| 606 | /* |
| 607 | * Backup to beginning of BankField declaration |
| 608 | * |
| 609 | * BodyLength is unknown until we parse the body |
| 610 | */ |
| 611 | Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); |
| 612 | } |
| 613 | |
| 614 | /* This op complete, notify the dispatcher */ |
| 615 | |
| 616 | if (WalkState->AscendingCallback != NULL) |
| 617 | { |
| 618 | WalkState->Op = Op; |
| 619 | WalkState->Opcode = Op->Common.AmlOpcode; |
| 620 | |
| 621 | Status = WalkState->AscendingCallback (WalkState); |
| 622 | Status = AcpiPsNextParseState (WalkState, Op, Status); |
| 623 | if (Status == AE_CTRL_PENDING) |
| 624 | { |
| 625 | Status = AE_OK; |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | Status = AcpiPsCompleteOp (WalkState, &Op, Status); |
| 630 | if (ACPI_FAILURE (Status)) |
| 631 | { |
| 632 | return_ACPI_STATUS (Status); |
| 633 | } |
| 634 | |
| 635 | } /* while ParserState->Aml */ |
| 636 | |
| 637 | Status = AcpiPsCompleteFinalOp (WalkState, Op, Status); |
| 638 | return_ACPI_STATUS (Status); |
| 639 | } |
| 640 | |