| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: psargs - Parse AML opcode arguments |
| 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 "acnamesp.h" |
| 49 | #include "acdispat.h" |
| 50 | |
| 51 | #define _COMPONENT ACPI_PARSER |
| 52 | ACPI_MODULE_NAME ("psargs" ) |
| 53 | |
| 54 | /* Local prototypes */ |
| 55 | |
| 56 | static UINT32 |
| 57 | AcpiPsGetNextPackageLength ( |
| 58 | ACPI_PARSE_STATE *ParserState); |
| 59 | |
| 60 | static ACPI_PARSE_OBJECT * |
| 61 | AcpiPsGetNextField ( |
| 62 | ACPI_PARSE_STATE *ParserState); |
| 63 | |
| 64 | |
| 65 | /******************************************************************************* |
| 66 | * |
| 67 | * FUNCTION: AcpiPsGetNextPackageLength |
| 68 | * |
| 69 | * PARAMETERS: ParserState - Current parser state object |
| 70 | * |
| 71 | * RETURN: Decoded package length. On completion, the AML pointer points |
| 72 | * past the length byte or bytes. |
| 73 | * |
| 74 | * DESCRIPTION: Decode and return a package length field. |
| 75 | * Note: Largest package length is 28 bits, from ACPI specification |
| 76 | * |
| 77 | ******************************************************************************/ |
| 78 | |
| 79 | static UINT32 |
| 80 | AcpiPsGetNextPackageLength ( |
| 81 | ACPI_PARSE_STATE *ParserState) |
| 82 | { |
| 83 | UINT8 *Aml = ParserState->Aml; |
| 84 | UINT32 PackageLength = 0; |
| 85 | UINT32 ByteCount; |
| 86 | UINT8 ByteZeroMask = 0x3F; /* Default [0:5] */ |
| 87 | |
| 88 | |
| 89 | ACPI_FUNCTION_TRACE (PsGetNextPackageLength); |
| 90 | |
| 91 | |
| 92 | /* |
| 93 | * Byte 0 bits [6:7] contain the number of additional bytes |
| 94 | * used to encode the package length, either 0,1,2, or 3 |
| 95 | */ |
| 96 | ByteCount = (Aml[0] >> 6); |
| 97 | ParserState->Aml += ((ACPI_SIZE) ByteCount + 1); |
| 98 | |
| 99 | /* Get bytes 3, 2, 1 as needed */ |
| 100 | |
| 101 | while (ByteCount) |
| 102 | { |
| 103 | /* |
| 104 | * Final bit positions for the package length bytes: |
| 105 | * Byte3->[20:27] |
| 106 | * Byte2->[12:19] |
| 107 | * Byte1->[04:11] |
| 108 | * Byte0->[00:03] |
| 109 | */ |
| 110 | PackageLength |= (Aml[ByteCount] << ((ByteCount << 3) - 4)); |
| 111 | |
| 112 | ByteZeroMask = 0x0F; /* Use bits [0:3] of byte 0 */ |
| 113 | ByteCount--; |
| 114 | } |
| 115 | |
| 116 | /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */ |
| 117 | |
| 118 | PackageLength |= (Aml[0] & ByteZeroMask); |
| 119 | return_UINT32 (PackageLength); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | /******************************************************************************* |
| 124 | * |
| 125 | * FUNCTION: AcpiPsGetNextPackageEnd |
| 126 | * |
| 127 | * PARAMETERS: ParserState - Current parser state object |
| 128 | * |
| 129 | * RETURN: Pointer to end-of-package +1 |
| 130 | * |
| 131 | * DESCRIPTION: Get next package length and return a pointer past the end of |
| 132 | * the package. Consumes the package length field |
| 133 | * |
| 134 | ******************************************************************************/ |
| 135 | |
| 136 | UINT8 * |
| 137 | AcpiPsGetNextPackageEnd ( |
| 138 | ACPI_PARSE_STATE *ParserState) |
| 139 | { |
| 140 | UINT8 *Start = ParserState->Aml; |
| 141 | UINT32 PackageLength; |
| 142 | |
| 143 | |
| 144 | ACPI_FUNCTION_TRACE (PsGetNextPackageEnd); |
| 145 | |
| 146 | |
| 147 | /* Function below updates ParserState->Aml */ |
| 148 | |
| 149 | PackageLength = AcpiPsGetNextPackageLength (ParserState); |
| 150 | |
| 151 | return_PTR (Start + PackageLength); /* end of package */ |
| 152 | } |
| 153 | |
| 154 | |
| 155 | /******************************************************************************* |
| 156 | * |
| 157 | * FUNCTION: AcpiPsGetNextNamestring |
| 158 | * |
| 159 | * PARAMETERS: ParserState - Current parser state object |
| 160 | * |
| 161 | * RETURN: Pointer to the start of the name string (pointer points into |
| 162 | * the AML. |
| 163 | * |
| 164 | * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name |
| 165 | * prefix characters. Set parser state to point past the string. |
| 166 | * (Name is consumed from the AML.) |
| 167 | * |
| 168 | ******************************************************************************/ |
| 169 | |
| 170 | char * |
| 171 | AcpiPsGetNextNamestring ( |
| 172 | ACPI_PARSE_STATE *ParserState) |
| 173 | { |
| 174 | UINT8 *Start = ParserState->Aml; |
| 175 | UINT8 *End = ParserState->Aml; |
| 176 | |
| 177 | |
| 178 | ACPI_FUNCTION_TRACE (PsGetNextNamestring); |
| 179 | |
| 180 | |
| 181 | /* Point past any namestring prefix characters (backslash or carat) */ |
| 182 | |
| 183 | while (ACPI_IS_ROOT_PREFIX (*End) || |
| 184 | ACPI_IS_PARENT_PREFIX (*End)) |
| 185 | { |
| 186 | End++; |
| 187 | } |
| 188 | |
| 189 | /* Decode the path prefix character */ |
| 190 | |
| 191 | switch (*End) |
| 192 | { |
| 193 | case 0: |
| 194 | |
| 195 | /* NullName */ |
| 196 | |
| 197 | if (End == Start) |
| 198 | { |
| 199 | Start = NULL; |
| 200 | } |
| 201 | End++; |
| 202 | break; |
| 203 | |
| 204 | case AML_DUAL_NAME_PREFIX: |
| 205 | |
| 206 | /* Two name segments */ |
| 207 | |
| 208 | End += 1 + (2 * ACPI_NAME_SIZE); |
| 209 | break; |
| 210 | |
| 211 | case AML_MULTI_NAME_PREFIX_OP: |
| 212 | |
| 213 | /* Multiple name segments, 4 chars each, count in next byte */ |
| 214 | |
| 215 | End += 2 + (*(End + 1) * ACPI_NAME_SIZE); |
| 216 | break; |
| 217 | |
| 218 | default: |
| 219 | |
| 220 | /* Single name segment */ |
| 221 | |
| 222 | End += ACPI_NAME_SIZE; |
| 223 | break; |
| 224 | } |
| 225 | |
| 226 | ParserState->Aml = End; |
| 227 | return_PTR ((char *) Start); |
| 228 | } |
| 229 | |
| 230 | |
| 231 | /******************************************************************************* |
| 232 | * |
| 233 | * FUNCTION: AcpiPsGetNextNamepath |
| 234 | * |
| 235 | * PARAMETERS: ParserState - Current parser state object |
| 236 | * Arg - Where the namepath will be stored |
| 237 | * ArgCount - If the namepath points to a control method |
| 238 | * the method's argument is returned here. |
| 239 | * PossibleMethodCall - Whether the namepath can possibly be the |
| 240 | * start of a method call |
| 241 | * |
| 242 | * RETURN: Status |
| 243 | * |
| 244 | * DESCRIPTION: Get next name (if method call, return # of required args). |
| 245 | * Names are looked up in the internal namespace to determine |
| 246 | * if the name represents a control method. If a method |
| 247 | * is found, the number of arguments to the method is returned. |
| 248 | * This information is critical for parsing to continue correctly. |
| 249 | * |
| 250 | ******************************************************************************/ |
| 251 | |
| 252 | ACPI_STATUS |
| 253 | AcpiPsGetNextNamepath ( |
| 254 | ACPI_WALK_STATE *WalkState, |
| 255 | ACPI_PARSE_STATE *ParserState, |
| 256 | ACPI_PARSE_OBJECT *Arg, |
| 257 | BOOLEAN PossibleMethodCall) |
| 258 | { |
| 259 | ACPI_STATUS Status; |
| 260 | char *Path; |
| 261 | ACPI_PARSE_OBJECT *NameOp; |
| 262 | ACPI_OPERAND_OBJECT *MethodDesc; |
| 263 | ACPI_NAMESPACE_NODE *Node; |
| 264 | UINT8 *Start = ParserState->Aml; |
| 265 | |
| 266 | |
| 267 | ACPI_FUNCTION_TRACE (PsGetNextNamepath); |
| 268 | |
| 269 | |
| 270 | Path = AcpiPsGetNextNamestring (ParserState); |
| 271 | AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); |
| 272 | |
| 273 | /* Null path case is allowed, just exit */ |
| 274 | |
| 275 | if (!Path) |
| 276 | { |
| 277 | Arg->Common.Value.Name = Path; |
| 278 | return_ACPI_STATUS (AE_OK); |
| 279 | } |
| 280 | |
| 281 | /* |
| 282 | * Lookup the name in the internal namespace, starting with the current |
| 283 | * scope. We don't want to add anything new to the namespace here, |
| 284 | * however, so we use MODE_EXECUTE. |
| 285 | * Allow searching of the parent tree, but don't open a new scope - |
| 286 | * we just want to lookup the object (must be mode EXECUTE to perform |
| 287 | * the upsearch) |
| 288 | */ |
| 289 | Status = AcpiNsLookup (WalkState->ScopeInfo, Path, |
| 290 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, |
| 291 | ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node); |
| 292 | |
| 293 | /* |
| 294 | * If this name is a control method invocation, we must |
| 295 | * setup the method call |
| 296 | */ |
| 297 | if (ACPI_SUCCESS (Status) && |
| 298 | PossibleMethodCall && |
| 299 | (Node->Type == ACPI_TYPE_METHOD)) |
| 300 | { |
| 301 | if (WalkState->Opcode == AML_UNLOAD_OP) |
| 302 | { |
| 303 | /* |
| 304 | * AcpiPsGetNextNamestring has increased the AML pointer, |
| 305 | * so we need to restore the saved AML pointer for method call. |
| 306 | */ |
| 307 | WalkState->ParserState.Aml = Start; |
| 308 | WalkState->ArgCount = 1; |
| 309 | AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP); |
| 310 | return_ACPI_STATUS (AE_OK); |
| 311 | } |
| 312 | |
| 313 | /* This name is actually a control method invocation */ |
| 314 | |
| 315 | MethodDesc = AcpiNsGetAttachedObject (Node); |
| 316 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, |
| 317 | "Control Method - %p Desc %p Path=%p\n" , Node, MethodDesc, Path)); |
| 318 | |
| 319 | NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, Start); |
| 320 | if (!NameOp) |
| 321 | { |
| 322 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 323 | } |
| 324 | |
| 325 | /* Change Arg into a METHOD CALL and attach name to it */ |
| 326 | |
| 327 | AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP); |
| 328 | NameOp->Common.Value.Name = Path; |
| 329 | |
| 330 | /* Point METHODCALL/NAME to the METHOD Node */ |
| 331 | |
| 332 | NameOp->Common.Node = Node; |
| 333 | AcpiPsAppendArg (Arg, NameOp); |
| 334 | |
| 335 | if (!MethodDesc) |
| 336 | { |
| 337 | ACPI_ERROR ((AE_INFO, |
| 338 | "Control Method %p has no attached object" , |
| 339 | Node)); |
| 340 | return_ACPI_STATUS (AE_AML_INTERNAL); |
| 341 | } |
| 342 | |
| 343 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, |
| 344 | "Control Method - %p Args %X\n" , |
| 345 | Node, MethodDesc->Method.ParamCount)); |
| 346 | |
| 347 | /* Get the number of arguments to expect */ |
| 348 | |
| 349 | WalkState->ArgCount = MethodDesc->Method.ParamCount; |
| 350 | return_ACPI_STATUS (AE_OK); |
| 351 | } |
| 352 | |
| 353 | /* |
| 354 | * Special handling if the name was not found during the lookup - |
| 355 | * some NotFound cases are allowed |
| 356 | */ |
| 357 | if (Status == AE_NOT_FOUND) |
| 358 | { |
| 359 | /* 1) NotFound is ok during load pass 1/2 (allow forward references) */ |
| 360 | |
| 361 | if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) != |
| 362 | ACPI_PARSE_EXECUTE) |
| 363 | { |
| 364 | Status = AE_OK; |
| 365 | } |
| 366 | |
| 367 | /* 2) NotFound during a CondRefOf(x) is ok by definition */ |
| 368 | |
| 369 | else if (WalkState->Op->Common.AmlOpcode == AML_COND_REF_OF_OP) |
| 370 | { |
| 371 | Status = AE_OK; |
| 372 | } |
| 373 | |
| 374 | /* |
| 375 | * 3) NotFound while building a Package is ok at this point, we |
| 376 | * may flag as an error later if slack mode is not enabled. |
| 377 | * (Some ASL code depends on allowing this behavior) |
| 378 | */ |
| 379 | else if ((Arg->Common.Parent) && |
| 380 | ((Arg->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || |
| 381 | (Arg->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))) |
| 382 | { |
| 383 | Status = AE_OK; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | /* Final exception check (may have been changed from code above) */ |
| 388 | |
| 389 | if (ACPI_FAILURE (Status)) |
| 390 | { |
| 391 | ACPI_ERROR_NAMESPACE (Path, Status); |
| 392 | |
| 393 | if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) == |
| 394 | ACPI_PARSE_EXECUTE) |
| 395 | { |
| 396 | /* Report a control method execution error */ |
| 397 | |
| 398 | Status = AcpiDsMethodError (Status, WalkState); |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | /* Save the namepath */ |
| 403 | |
| 404 | Arg->Common.Value.Name = Path; |
| 405 | return_ACPI_STATUS (Status); |
| 406 | } |
| 407 | |
| 408 | |
| 409 | /******************************************************************************* |
| 410 | * |
| 411 | * FUNCTION: AcpiPsGetNextSimpleArg |
| 412 | * |
| 413 | * PARAMETERS: ParserState - Current parser state object |
| 414 | * ArgType - The argument type (AML_*_ARG) |
| 415 | * Arg - Where the argument is returned |
| 416 | * |
| 417 | * RETURN: None |
| 418 | * |
| 419 | * DESCRIPTION: Get the next simple argument (constant, string, or namestring) |
| 420 | * |
| 421 | ******************************************************************************/ |
| 422 | |
| 423 | void |
| 424 | AcpiPsGetNextSimpleArg ( |
| 425 | ACPI_PARSE_STATE *ParserState, |
| 426 | UINT32 ArgType, |
| 427 | ACPI_PARSE_OBJECT *Arg) |
| 428 | { |
| 429 | UINT32 Length; |
| 430 | UINT16 Opcode; |
| 431 | UINT8 *Aml = ParserState->Aml; |
| 432 | |
| 433 | |
| 434 | ACPI_FUNCTION_TRACE_U32 (PsGetNextSimpleArg, ArgType); |
| 435 | |
| 436 | |
| 437 | switch (ArgType) |
| 438 | { |
| 439 | case ARGP_BYTEDATA: |
| 440 | |
| 441 | /* Get 1 byte from the AML stream */ |
| 442 | |
| 443 | Opcode = AML_BYTE_OP; |
| 444 | Arg->Common.Value.Integer = (UINT64) *Aml; |
| 445 | Length = 1; |
| 446 | break; |
| 447 | |
| 448 | case ARGP_WORDDATA: |
| 449 | |
| 450 | /* Get 2 bytes from the AML stream */ |
| 451 | |
| 452 | Opcode = AML_WORD_OP; |
| 453 | ACPI_MOVE_16_TO_64 (&Arg->Common.Value.Integer, Aml); |
| 454 | Length = 2; |
| 455 | break; |
| 456 | |
| 457 | case ARGP_DWORDDATA: |
| 458 | |
| 459 | /* Get 4 bytes from the AML stream */ |
| 460 | |
| 461 | Opcode = AML_DWORD_OP; |
| 462 | ACPI_MOVE_32_TO_64 (&Arg->Common.Value.Integer, Aml); |
| 463 | Length = 4; |
| 464 | break; |
| 465 | |
| 466 | case ARGP_QWORDDATA: |
| 467 | |
| 468 | /* Get 8 bytes from the AML stream */ |
| 469 | |
| 470 | Opcode = AML_QWORD_OP; |
| 471 | ACPI_MOVE_64_TO_64 (&Arg->Common.Value.Integer, Aml); |
| 472 | Length = 8; |
| 473 | break; |
| 474 | |
| 475 | case ARGP_CHARLIST: |
| 476 | |
| 477 | /* Get a pointer to the string, point past the string */ |
| 478 | |
| 479 | Opcode = AML_STRING_OP; |
| 480 | Arg->Common.Value.String = ACPI_CAST_PTR (char, Aml); |
| 481 | |
| 482 | /* Find the null terminator */ |
| 483 | |
| 484 | Length = 0; |
| 485 | while (Aml[Length]) |
| 486 | { |
| 487 | Length++; |
| 488 | } |
| 489 | Length++; |
| 490 | break; |
| 491 | |
| 492 | case ARGP_NAME: |
| 493 | case ARGP_NAMESTRING: |
| 494 | |
| 495 | AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); |
| 496 | Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState); |
| 497 | return_VOID; |
| 498 | |
| 499 | default: |
| 500 | |
| 501 | ACPI_ERROR ((AE_INFO, "Invalid ArgType 0x%X" , ArgType)); |
| 502 | return_VOID; |
| 503 | } |
| 504 | |
| 505 | AcpiPsInitOp (Arg, Opcode); |
| 506 | ParserState->Aml += Length; |
| 507 | return_VOID; |
| 508 | } |
| 509 | |
| 510 | |
| 511 | /******************************************************************************* |
| 512 | * |
| 513 | * FUNCTION: AcpiPsGetNextField |
| 514 | * |
| 515 | * PARAMETERS: ParserState - Current parser state object |
| 516 | * |
| 517 | * RETURN: A newly allocated FIELD op |
| 518 | * |
| 519 | * DESCRIPTION: Get next field (NamedField, ReservedField, or AccessField) |
| 520 | * |
| 521 | ******************************************************************************/ |
| 522 | |
| 523 | static ACPI_PARSE_OBJECT * |
| 524 | AcpiPsGetNextField ( |
| 525 | ACPI_PARSE_STATE *ParserState) |
| 526 | { |
| 527 | UINT8 *Aml; |
| 528 | ACPI_PARSE_OBJECT *Field; |
| 529 | ACPI_PARSE_OBJECT *Arg = NULL; |
| 530 | UINT16 Opcode; |
| 531 | UINT32 Name; |
| 532 | UINT8 AccessType; |
| 533 | UINT8 AccessAttribute; |
| 534 | UINT8 AccessLength; |
| 535 | UINT32 PkgLength; |
| 536 | UINT8 *PkgEnd; |
| 537 | UINT32 BufferLength; |
| 538 | |
| 539 | |
| 540 | ACPI_FUNCTION_TRACE (PsGetNextField); |
| 541 | |
| 542 | |
| 543 | Aml = ParserState->Aml; |
| 544 | |
| 545 | /* Determine field type */ |
| 546 | |
| 547 | switch (ACPI_GET8 (ParserState->Aml)) |
| 548 | { |
| 549 | case AML_FIELD_OFFSET_OP: |
| 550 | |
| 551 | Opcode = AML_INT_RESERVEDFIELD_OP; |
| 552 | ParserState->Aml++; |
| 553 | break; |
| 554 | |
| 555 | case AML_FIELD_ACCESS_OP: |
| 556 | |
| 557 | Opcode = AML_INT_ACCESSFIELD_OP; |
| 558 | ParserState->Aml++; |
| 559 | break; |
| 560 | |
| 561 | case AML_FIELD_CONNECTION_OP: |
| 562 | |
| 563 | Opcode = AML_INT_CONNECTION_OP; |
| 564 | ParserState->Aml++; |
| 565 | break; |
| 566 | |
| 567 | case AML_FIELD_EXT_ACCESS_OP: |
| 568 | |
| 569 | Opcode = AML_INT_EXTACCESSFIELD_OP; |
| 570 | ParserState->Aml++; |
| 571 | break; |
| 572 | |
| 573 | default: |
| 574 | |
| 575 | Opcode = AML_INT_NAMEDFIELD_OP; |
| 576 | break; |
| 577 | } |
| 578 | |
| 579 | /* Allocate a new field op */ |
| 580 | |
| 581 | Field = AcpiPsAllocOp (Opcode, Aml); |
| 582 | if (!Field) |
| 583 | { |
| 584 | return_PTR (NULL); |
| 585 | } |
| 586 | |
| 587 | /* Decode the field type */ |
| 588 | |
| 589 | switch (Opcode) |
| 590 | { |
| 591 | case AML_INT_NAMEDFIELD_OP: |
| 592 | |
| 593 | /* Get the 4-character name */ |
| 594 | |
| 595 | ACPI_MOVE_32_TO_32 (&Name, ParserState->Aml); |
| 596 | AcpiPsSetName (Field, Name); |
| 597 | ParserState->Aml += ACPI_NAME_SIZE; |
| 598 | |
| 599 | /* Get the length which is encoded as a package length */ |
| 600 | |
| 601 | Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState); |
| 602 | break; |
| 603 | |
| 604 | |
| 605 | case AML_INT_RESERVEDFIELD_OP: |
| 606 | |
| 607 | /* Get the length which is encoded as a package length */ |
| 608 | |
| 609 | Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState); |
| 610 | break; |
| 611 | |
| 612 | |
| 613 | case AML_INT_ACCESSFIELD_OP: |
| 614 | case AML_INT_EXTACCESSFIELD_OP: |
| 615 | |
| 616 | /* |
| 617 | * Get AccessType and AccessAttrib and merge into the field Op |
| 618 | * AccessType is first operand, AccessAttribute is second. stuff |
| 619 | * these bytes into the node integer value for convenience. |
| 620 | */ |
| 621 | |
| 622 | /* Get the two bytes (Type/Attribute) */ |
| 623 | |
| 624 | AccessType = ACPI_GET8 (ParserState->Aml); |
| 625 | ParserState->Aml++; |
| 626 | AccessAttribute = ACPI_GET8 (ParserState->Aml); |
| 627 | ParserState->Aml++; |
| 628 | |
| 629 | Field->Common.Value.Integer = (UINT8) AccessType; |
| 630 | Field->Common.Value.Integer |= (UINT16) (AccessAttribute << 8); |
| 631 | |
| 632 | /* This opcode has a third byte, AccessLength */ |
| 633 | |
| 634 | if (Opcode == AML_INT_EXTACCESSFIELD_OP) |
| 635 | { |
| 636 | AccessLength = ACPI_GET8 (ParserState->Aml); |
| 637 | ParserState->Aml++; |
| 638 | |
| 639 | Field->Common.Value.Integer |= (UINT32) (AccessLength << 16); |
| 640 | } |
| 641 | break; |
| 642 | |
| 643 | |
| 644 | case AML_INT_CONNECTION_OP: |
| 645 | |
| 646 | /* |
| 647 | * Argument for Connection operator can be either a Buffer |
| 648 | * (resource descriptor), or a NameString. |
| 649 | */ |
| 650 | Aml = ParserState->Aml; |
| 651 | if (ACPI_GET8 (ParserState->Aml) == AML_BUFFER_OP) |
| 652 | { |
| 653 | ParserState->Aml++; |
| 654 | |
| 655 | PkgEnd = ParserState->Aml; |
| 656 | PkgLength = AcpiPsGetNextPackageLength (ParserState); |
| 657 | PkgEnd += PkgLength; |
| 658 | |
| 659 | if (ParserState->Aml < PkgEnd) |
| 660 | { |
| 661 | /* Non-empty list */ |
| 662 | |
| 663 | Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP, Aml); |
| 664 | if (!Arg) |
| 665 | { |
| 666 | AcpiPsFreeOp (Field); |
| 667 | return_PTR (NULL); |
| 668 | } |
| 669 | |
| 670 | /* Get the actual buffer length argument */ |
| 671 | |
| 672 | Opcode = ACPI_GET8 (ParserState->Aml); |
| 673 | ParserState->Aml++; |
| 674 | |
| 675 | switch (Opcode) |
| 676 | { |
| 677 | case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ |
| 678 | |
| 679 | BufferLength = ACPI_GET8 (ParserState->Aml); |
| 680 | ParserState->Aml += 1; |
| 681 | break; |
| 682 | |
| 683 | case AML_WORD_OP: /* AML_WORDDATA_ARG */ |
| 684 | |
| 685 | BufferLength = ACPI_GET16 (ParserState->Aml); |
| 686 | ParserState->Aml += 2; |
| 687 | break; |
| 688 | |
| 689 | case AML_DWORD_OP: /* AML_DWORDATA_ARG */ |
| 690 | |
| 691 | BufferLength = ACPI_GET32 (ParserState->Aml); |
| 692 | ParserState->Aml += 4; |
| 693 | break; |
| 694 | |
| 695 | default: |
| 696 | |
| 697 | BufferLength = 0; |
| 698 | break; |
| 699 | } |
| 700 | |
| 701 | /* Fill in bytelist data */ |
| 702 | |
| 703 | Arg->Named.Value.Size = BufferLength; |
| 704 | Arg->Named.Data = ParserState->Aml; |
| 705 | } |
| 706 | |
| 707 | /* Skip to End of byte data */ |
| 708 | |
| 709 | ParserState->Aml = PkgEnd; |
| 710 | } |
| 711 | else |
| 712 | { |
| 713 | Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, Aml); |
| 714 | if (!Arg) |
| 715 | { |
| 716 | AcpiPsFreeOp (Field); |
| 717 | return_PTR (NULL); |
| 718 | } |
| 719 | |
| 720 | /* Get the Namestring argument */ |
| 721 | |
| 722 | Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState); |
| 723 | } |
| 724 | |
| 725 | /* Link the buffer/namestring to parent (CONNECTION_OP) */ |
| 726 | |
| 727 | AcpiPsAppendArg (Field, Arg); |
| 728 | break; |
| 729 | |
| 730 | |
| 731 | default: |
| 732 | |
| 733 | /* Opcode was set in previous switch */ |
| 734 | break; |
| 735 | } |
| 736 | |
| 737 | return_PTR (Field); |
| 738 | } |
| 739 | |
| 740 | |
| 741 | /******************************************************************************* |
| 742 | * |
| 743 | * FUNCTION: AcpiPsGetNextArg |
| 744 | * |
| 745 | * PARAMETERS: WalkState - Current state |
| 746 | * ParserState - Current parser state object |
| 747 | * ArgType - The argument type (AML_*_ARG) |
| 748 | * ReturnArg - Where the next arg is returned |
| 749 | * |
| 750 | * RETURN: Status, and an op object containing the next argument. |
| 751 | * |
| 752 | * DESCRIPTION: Get next argument (including complex list arguments that require |
| 753 | * pushing the parser stack) |
| 754 | * |
| 755 | ******************************************************************************/ |
| 756 | |
| 757 | ACPI_STATUS |
| 758 | AcpiPsGetNextArg ( |
| 759 | ACPI_WALK_STATE *WalkState, |
| 760 | ACPI_PARSE_STATE *ParserState, |
| 761 | UINT32 ArgType, |
| 762 | ACPI_PARSE_OBJECT **ReturnArg) |
| 763 | { |
| 764 | ACPI_PARSE_OBJECT *Arg = NULL; |
| 765 | ACPI_PARSE_OBJECT *Prev = NULL; |
| 766 | ACPI_PARSE_OBJECT *Field; |
| 767 | UINT32 Subop; |
| 768 | ACPI_STATUS Status = AE_OK; |
| 769 | |
| 770 | |
| 771 | ACPI_FUNCTION_TRACE_PTR (PsGetNextArg, ParserState); |
| 772 | |
| 773 | |
| 774 | switch (ArgType) |
| 775 | { |
| 776 | case ARGP_BYTEDATA: |
| 777 | case ARGP_WORDDATA: |
| 778 | case ARGP_DWORDDATA: |
| 779 | case ARGP_CHARLIST: |
| 780 | case ARGP_NAME: |
| 781 | case ARGP_NAMESTRING: |
| 782 | |
| 783 | /* Constants, strings, and namestrings are all the same size */ |
| 784 | |
| 785 | Arg = AcpiPsAllocOp (AML_BYTE_OP, ParserState->Aml); |
| 786 | if (!Arg) |
| 787 | { |
| 788 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 789 | } |
| 790 | |
| 791 | AcpiPsGetNextSimpleArg (ParserState, ArgType, Arg); |
| 792 | break; |
| 793 | |
| 794 | case ARGP_PKGLENGTH: |
| 795 | |
| 796 | /* Package length, nothing returned */ |
| 797 | |
| 798 | ParserState->PkgEnd = AcpiPsGetNextPackageEnd (ParserState); |
| 799 | break; |
| 800 | |
| 801 | case ARGP_FIELDLIST: |
| 802 | |
| 803 | if (ParserState->Aml < ParserState->PkgEnd) |
| 804 | { |
| 805 | /* Non-empty list */ |
| 806 | |
| 807 | while (ParserState->Aml < ParserState->PkgEnd) |
| 808 | { |
| 809 | Field = AcpiPsGetNextField (ParserState); |
| 810 | if (!Field) |
| 811 | { |
| 812 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 813 | } |
| 814 | |
| 815 | if (Prev) |
| 816 | { |
| 817 | Prev->Common.Next = Field; |
| 818 | } |
| 819 | else |
| 820 | { |
| 821 | Arg = Field; |
| 822 | } |
| 823 | Prev = Field; |
| 824 | } |
| 825 | |
| 826 | /* Skip to End of byte data */ |
| 827 | |
| 828 | ParserState->Aml = ParserState->PkgEnd; |
| 829 | } |
| 830 | break; |
| 831 | |
| 832 | case ARGP_BYTELIST: |
| 833 | |
| 834 | if (ParserState->Aml < ParserState->PkgEnd) |
| 835 | { |
| 836 | /* Non-empty list */ |
| 837 | |
| 838 | Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP, |
| 839 | ParserState->Aml); |
| 840 | if (!Arg) |
| 841 | { |
| 842 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 843 | } |
| 844 | |
| 845 | /* Fill in bytelist data */ |
| 846 | |
| 847 | Arg->Common.Value.Size = (UINT32) |
| 848 | ACPI_PTR_DIFF (ParserState->PkgEnd, ParserState->Aml); |
| 849 | Arg->Named.Data = ParserState->Aml; |
| 850 | |
| 851 | /* Skip to End of byte data */ |
| 852 | |
| 853 | ParserState->Aml = ParserState->PkgEnd; |
| 854 | } |
| 855 | break; |
| 856 | |
| 857 | case ARGP_TARGET: |
| 858 | case ARGP_SUPERNAME: |
| 859 | case ARGP_SIMPLENAME: |
| 860 | case ARGP_NAME_OR_REF: |
| 861 | |
| 862 | Subop = AcpiPsPeekOpcode (ParserState); |
| 863 | if (Subop == 0 || |
| 864 | AcpiPsIsLeadingChar (Subop) || |
| 865 | ACPI_IS_ROOT_PREFIX (Subop) || |
| 866 | ACPI_IS_PARENT_PREFIX (Subop)) |
| 867 | { |
| 868 | /* NullName or NameString */ |
| 869 | |
| 870 | Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, ParserState->Aml); |
| 871 | if (!Arg) |
| 872 | { |
| 873 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 874 | } |
| 875 | |
| 876 | /* To support SuperName arg of Unload */ |
| 877 | |
| 878 | if (WalkState->Opcode == AML_UNLOAD_OP) |
| 879 | { |
| 880 | Status = AcpiPsGetNextNamepath (WalkState, ParserState, |
| 881 | Arg, ACPI_POSSIBLE_METHOD_CALL); |
| 882 | |
| 883 | /* |
| 884 | * If the SuperName argument is a method call, we have |
| 885 | * already restored the AML pointer, just free this Arg |
| 886 | */ |
| 887 | if (Arg->Common.AmlOpcode == AML_INT_METHODCALL_OP) |
| 888 | { |
| 889 | AcpiPsFreeOp (Arg); |
| 890 | Arg = NULL; |
| 891 | } |
| 892 | } |
| 893 | else |
| 894 | { |
| 895 | Status = AcpiPsGetNextNamepath (WalkState, ParserState, |
| 896 | Arg, ACPI_NOT_METHOD_CALL); |
| 897 | } |
| 898 | } |
| 899 | else |
| 900 | { |
| 901 | /* Single complex argument, nothing returned */ |
| 902 | |
| 903 | WalkState->ArgCount = 1; |
| 904 | } |
| 905 | break; |
| 906 | |
| 907 | case ARGP_DATAOBJ: |
| 908 | case ARGP_TERMARG: |
| 909 | |
| 910 | /* Single complex argument, nothing returned */ |
| 911 | |
| 912 | WalkState->ArgCount = 1; |
| 913 | break; |
| 914 | |
| 915 | case ARGP_DATAOBJLIST: |
| 916 | case ARGP_TERMLIST: |
| 917 | case ARGP_OBJLIST: |
| 918 | |
| 919 | if (ParserState->Aml < ParserState->PkgEnd) |
| 920 | { |
| 921 | /* Non-empty list of variable arguments, nothing returned */ |
| 922 | |
| 923 | WalkState->ArgCount = ACPI_VAR_ARGS; |
| 924 | } |
| 925 | break; |
| 926 | |
| 927 | default: |
| 928 | |
| 929 | ACPI_ERROR ((AE_INFO, "Invalid ArgType: 0x%X" , ArgType)); |
| 930 | Status = AE_AML_OPERAND_TYPE; |
| 931 | break; |
| 932 | } |
| 933 | |
| 934 | *ReturnArg = Arg; |
| 935 | return_ACPI_STATUS (Status); |
| 936 | } |
| 937 | |