| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing |
| 4 | * parents and siblings and Scope manipulation |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
| 9 | * Copyright (C) 2000 - 2016, Intel Corp. |
| 10 | * All rights reserved. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions, and the following disclaimer, |
| 17 | * without modification. |
| 18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 19 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 20 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 21 | * including a substantially similar Disclaimer requirement for further |
| 22 | * binary redistribution. |
| 23 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 24 | * of any contributors may be used to endorse or promote products derived |
| 25 | * from this software without specific prior written permission. |
| 26 | * |
| 27 | * Alternatively, this software may be distributed under the terms of the |
| 28 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 29 | * Software Foundation. |
| 30 | * |
| 31 | * NO WARRANTY |
| 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 42 | * POSSIBILITY OF SUCH DAMAGES. |
| 43 | */ |
| 44 | |
| 45 | #include "acpi.h" |
| 46 | #include "accommon.h" |
| 47 | #include "acnamesp.h" |
| 48 | #include "amlcode.h" |
| 49 | |
| 50 | #define _COMPONENT ACPI_NAMESPACE |
| 51 | ACPI_MODULE_NAME ("nsutils" ) |
| 52 | |
| 53 | /* Local prototypes */ |
| 54 | |
| 55 | #ifdef ACPI_OBSOLETE_FUNCTIONS |
| 56 | ACPI_NAME |
| 57 | AcpiNsFindParentName ( |
| 58 | ACPI_NAMESPACE_NODE *NodeToSearch); |
| 59 | #endif |
| 60 | |
| 61 | |
| 62 | /******************************************************************************* |
| 63 | * |
| 64 | * FUNCTION: AcpiNsPrintNodePathname |
| 65 | * |
| 66 | * PARAMETERS: Node - Object |
| 67 | * Message - Prefix message |
| 68 | * |
| 69 | * DESCRIPTION: Print an object's full namespace pathname |
| 70 | * Manages allocation/freeing of a pathname buffer |
| 71 | * |
| 72 | ******************************************************************************/ |
| 73 | |
| 74 | void |
| 75 | AcpiNsPrintNodePathname ( |
| 76 | ACPI_NAMESPACE_NODE *Node, |
| 77 | const char *Message) |
| 78 | { |
| 79 | ACPI_BUFFER Buffer; |
| 80 | ACPI_STATUS Status; |
| 81 | |
| 82 | |
| 83 | if (!Node) |
| 84 | { |
| 85 | AcpiOsPrintf ("[NULL NAME]" ); |
| 86 | return; |
| 87 | } |
| 88 | |
| 89 | /* Convert handle to full pathname and print it (with supplied message) */ |
| 90 | |
| 91 | Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; |
| 92 | |
| 93 | Status = AcpiNsHandleToPathname (Node, &Buffer, TRUE); |
| 94 | if (ACPI_SUCCESS (Status)) |
| 95 | { |
| 96 | if (Message) |
| 97 | { |
| 98 | AcpiOsPrintf ("%s " , Message); |
| 99 | } |
| 100 | |
| 101 | AcpiOsPrintf ("[%s] (Node %p)" , (char *) Buffer.Pointer, Node); |
| 102 | ACPI_FREE (Buffer.Pointer); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | |
| 107 | /******************************************************************************* |
| 108 | * |
| 109 | * FUNCTION: AcpiNsGetType |
| 110 | * |
| 111 | * PARAMETERS: Node - Parent Node to be examined |
| 112 | * |
| 113 | * RETURN: Type field from Node whose handle is passed |
| 114 | * |
| 115 | * DESCRIPTION: Return the type of a Namespace node |
| 116 | * |
| 117 | ******************************************************************************/ |
| 118 | |
| 119 | ACPI_OBJECT_TYPE |
| 120 | AcpiNsGetType ( |
| 121 | ACPI_NAMESPACE_NODE *Node) |
| 122 | { |
| 123 | ACPI_FUNCTION_TRACE (NsGetType); |
| 124 | |
| 125 | |
| 126 | if (!Node) |
| 127 | { |
| 128 | ACPI_WARNING ((AE_INFO, "Null Node parameter" )); |
| 129 | return_UINT8 (ACPI_TYPE_ANY); |
| 130 | } |
| 131 | |
| 132 | return_UINT8 (Node->Type); |
| 133 | } |
| 134 | |
| 135 | |
| 136 | /******************************************************************************* |
| 137 | * |
| 138 | * FUNCTION: AcpiNsLocal |
| 139 | * |
| 140 | * PARAMETERS: Type - A namespace object type |
| 141 | * |
| 142 | * RETURN: LOCAL if names must be found locally in objects of the |
| 143 | * passed type, 0 if enclosing scopes should be searched |
| 144 | * |
| 145 | * DESCRIPTION: Returns scope rule for the given object type. |
| 146 | * |
| 147 | ******************************************************************************/ |
| 148 | |
| 149 | UINT32 |
| 150 | AcpiNsLocal ( |
| 151 | ACPI_OBJECT_TYPE Type) |
| 152 | { |
| 153 | ACPI_FUNCTION_TRACE (NsLocal); |
| 154 | |
| 155 | |
| 156 | if (!AcpiUtValidObjectType (Type)) |
| 157 | { |
| 158 | /* Type code out of range */ |
| 159 | |
| 160 | ACPI_WARNING ((AE_INFO, "Invalid Object Type 0x%X" , Type)); |
| 161 | return_UINT32 (ACPI_NS_NORMAL); |
| 162 | } |
| 163 | |
| 164 | return_UINT32 (AcpiGbl_NsProperties[Type] & ACPI_NS_LOCAL); |
| 165 | } |
| 166 | |
| 167 | |
| 168 | /******************************************************************************* |
| 169 | * |
| 170 | * FUNCTION: AcpiNsGetInternalNameLength |
| 171 | * |
| 172 | * PARAMETERS: Info - Info struct initialized with the |
| 173 | * external name pointer. |
| 174 | * |
| 175 | * RETURN: None |
| 176 | * |
| 177 | * DESCRIPTION: Calculate the length of the internal (AML) namestring |
| 178 | * corresponding to the external (ASL) namestring. |
| 179 | * |
| 180 | ******************************************************************************/ |
| 181 | |
| 182 | void |
| 183 | AcpiNsGetInternalNameLength ( |
| 184 | ACPI_NAMESTRING_INFO *Info) |
| 185 | { |
| 186 | const char *NextExternalChar; |
| 187 | UINT32 i; |
| 188 | |
| 189 | |
| 190 | ACPI_FUNCTION_ENTRY (); |
| 191 | |
| 192 | |
| 193 | NextExternalChar = Info->ExternalName; |
| 194 | Info->NumCarats = 0; |
| 195 | Info->NumSegments = 0; |
| 196 | Info->FullyQualified = FALSE; |
| 197 | |
| 198 | /* |
| 199 | * For the internal name, the required length is 4 bytes per segment, |
| 200 | * plus 1 each for RootPrefix, MultiNamePrefixOp, segment count, |
| 201 | * trailing null (which is not really needed, but no there's harm in |
| 202 | * putting it there) |
| 203 | * |
| 204 | * strlen() + 1 covers the first NameSeg, which has no path separator |
| 205 | */ |
| 206 | if (ACPI_IS_ROOT_PREFIX (*NextExternalChar)) |
| 207 | { |
| 208 | Info->FullyQualified = TRUE; |
| 209 | NextExternalChar++; |
| 210 | |
| 211 | /* Skip redundant RootPrefix, like \\_SB.PCI0.SBRG.EC0 */ |
| 212 | |
| 213 | while (ACPI_IS_ROOT_PREFIX (*NextExternalChar)) |
| 214 | { |
| 215 | NextExternalChar++; |
| 216 | } |
| 217 | } |
| 218 | else |
| 219 | { |
| 220 | /* Handle Carat prefixes */ |
| 221 | |
| 222 | while (ACPI_IS_PARENT_PREFIX (*NextExternalChar)) |
| 223 | { |
| 224 | Info->NumCarats++; |
| 225 | NextExternalChar++; |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * Determine the number of ACPI name "segments" by counting the number of |
| 231 | * path separators within the string. Start with one segment since the |
| 232 | * segment count is [(# separators) + 1], and zero separators is ok. |
| 233 | */ |
| 234 | if (*NextExternalChar) |
| 235 | { |
| 236 | Info->NumSegments = 1; |
| 237 | for (i = 0; NextExternalChar[i]; i++) |
| 238 | { |
| 239 | if (ACPI_IS_PATH_SEPARATOR (NextExternalChar[i])) |
| 240 | { |
| 241 | Info->NumSegments++; |
| 242 | } |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | Info->Length = (ACPI_NAME_SIZE * Info->NumSegments) + |
| 247 | 4 + Info->NumCarats; |
| 248 | |
| 249 | Info->NextExternalChar = NextExternalChar; |
| 250 | } |
| 251 | |
| 252 | |
| 253 | /******************************************************************************* |
| 254 | * |
| 255 | * FUNCTION: AcpiNsBuildInternalName |
| 256 | * |
| 257 | * PARAMETERS: Info - Info struct fully initialized |
| 258 | * |
| 259 | * RETURN: Status |
| 260 | * |
| 261 | * DESCRIPTION: Construct the internal (AML) namestring |
| 262 | * corresponding to the external (ASL) namestring. |
| 263 | * |
| 264 | ******************************************************************************/ |
| 265 | |
| 266 | ACPI_STATUS |
| 267 | AcpiNsBuildInternalName ( |
| 268 | ACPI_NAMESTRING_INFO *Info) |
| 269 | { |
| 270 | UINT32 NumSegments = Info->NumSegments; |
| 271 | char *InternalName = Info->InternalName; |
| 272 | const char *ExternalName = Info->NextExternalChar; |
| 273 | char *Result = NULL; |
| 274 | UINT32 i; |
| 275 | |
| 276 | |
| 277 | ACPI_FUNCTION_TRACE (NsBuildInternalName); |
| 278 | |
| 279 | |
| 280 | /* Setup the correct prefixes, counts, and pointers */ |
| 281 | |
| 282 | if (Info->FullyQualified) |
| 283 | { |
| 284 | InternalName[0] = AML_ROOT_PREFIX; |
| 285 | |
| 286 | if (NumSegments <= 1) |
| 287 | { |
| 288 | Result = &InternalName[1]; |
| 289 | } |
| 290 | else if (NumSegments == 2) |
| 291 | { |
| 292 | InternalName[1] = AML_DUAL_NAME_PREFIX; |
| 293 | Result = &InternalName[2]; |
| 294 | } |
| 295 | else |
| 296 | { |
| 297 | InternalName[1] = AML_MULTI_NAME_PREFIX_OP; |
| 298 | InternalName[2] = (char) NumSegments; |
| 299 | Result = &InternalName[3]; |
| 300 | } |
| 301 | } |
| 302 | else |
| 303 | { |
| 304 | /* |
| 305 | * Not fully qualified. |
| 306 | * Handle Carats first, then append the name segments |
| 307 | */ |
| 308 | i = 0; |
| 309 | if (Info->NumCarats) |
| 310 | { |
| 311 | for (i = 0; i < Info->NumCarats; i++) |
| 312 | { |
| 313 | InternalName[i] = AML_PARENT_PREFIX; |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | if (NumSegments <= 1) |
| 318 | { |
| 319 | Result = &InternalName[i]; |
| 320 | } |
| 321 | else if (NumSegments == 2) |
| 322 | { |
| 323 | InternalName[i] = AML_DUAL_NAME_PREFIX; |
| 324 | Result = &InternalName[(ACPI_SIZE) i+1]; |
| 325 | } |
| 326 | else |
| 327 | { |
| 328 | InternalName[i] = AML_MULTI_NAME_PREFIX_OP; |
| 329 | InternalName[(ACPI_SIZE) i+1] = (char) NumSegments; |
| 330 | Result = &InternalName[(ACPI_SIZE) i+2]; |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | /* Build the name (minus path separators) */ |
| 335 | |
| 336 | for (; NumSegments; NumSegments--) |
| 337 | { |
| 338 | for (i = 0; i < ACPI_NAME_SIZE; i++) |
| 339 | { |
| 340 | if (ACPI_IS_PATH_SEPARATOR (*ExternalName) || |
| 341 | (*ExternalName == 0)) |
| 342 | { |
| 343 | /* Pad the segment with underscore(s) if segment is short */ |
| 344 | |
| 345 | Result[i] = '_'; |
| 346 | } |
| 347 | else |
| 348 | { |
| 349 | /* Convert the character to uppercase and save it */ |
| 350 | |
| 351 | Result[i] = (char) toupper ((int) *ExternalName); |
| 352 | ExternalName++; |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | /* Now we must have a path separator, or the pathname is bad */ |
| 357 | |
| 358 | if (!ACPI_IS_PATH_SEPARATOR (*ExternalName) && |
| 359 | (*ExternalName != 0)) |
| 360 | { |
| 361 | return_ACPI_STATUS (AE_BAD_PATHNAME); |
| 362 | } |
| 363 | |
| 364 | /* Move on the next segment */ |
| 365 | |
| 366 | ExternalName++; |
| 367 | Result += ACPI_NAME_SIZE; |
| 368 | } |
| 369 | |
| 370 | /* Terminate the string */ |
| 371 | |
| 372 | *Result = 0; |
| 373 | |
| 374 | if (Info->FullyQualified) |
| 375 | { |
| 376 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (abs) \"\\%s\"\n" , |
| 377 | InternalName, InternalName)); |
| 378 | } |
| 379 | else |
| 380 | { |
| 381 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n" , |
| 382 | InternalName, InternalName)); |
| 383 | } |
| 384 | |
| 385 | return_ACPI_STATUS (AE_OK); |
| 386 | } |
| 387 | |
| 388 | |
| 389 | /******************************************************************************* |
| 390 | * |
| 391 | * FUNCTION: AcpiNsInternalizeName |
| 392 | * |
| 393 | * PARAMETERS: *ExternalName - External representation of name |
| 394 | * **Converted Name - Where to return the resulting |
| 395 | * internal represention of the name |
| 396 | * |
| 397 | * RETURN: Status |
| 398 | * |
| 399 | * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") |
| 400 | * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) |
| 401 | * |
| 402 | *******************************************************************************/ |
| 403 | |
| 404 | ACPI_STATUS |
| 405 | AcpiNsInternalizeName ( |
| 406 | const char *ExternalName, |
| 407 | char **ConvertedName) |
| 408 | { |
| 409 | char *InternalName; |
| 410 | ACPI_NAMESTRING_INFO Info; |
| 411 | ACPI_STATUS Status; |
| 412 | |
| 413 | |
| 414 | ACPI_FUNCTION_TRACE (NsInternalizeName); |
| 415 | |
| 416 | |
| 417 | if ((!ExternalName) || |
| 418 | (*ExternalName == 0) || |
| 419 | (!ConvertedName)) |
| 420 | { |
| 421 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 422 | } |
| 423 | |
| 424 | /* Get the length of the new internal name */ |
| 425 | |
| 426 | Info.ExternalName = ExternalName; |
| 427 | AcpiNsGetInternalNameLength (&Info); |
| 428 | |
| 429 | /* We need a segment to store the internal name */ |
| 430 | |
| 431 | InternalName = ACPI_ALLOCATE_ZEROED (Info.Length); |
| 432 | if (!InternalName) |
| 433 | { |
| 434 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 435 | } |
| 436 | |
| 437 | /* Build the name */ |
| 438 | |
| 439 | Info.InternalName = InternalName; |
| 440 | Status = AcpiNsBuildInternalName (&Info); |
| 441 | if (ACPI_FAILURE (Status)) |
| 442 | { |
| 443 | ACPI_FREE (InternalName); |
| 444 | return_ACPI_STATUS (Status); |
| 445 | } |
| 446 | |
| 447 | *ConvertedName = InternalName; |
| 448 | return_ACPI_STATUS (AE_OK); |
| 449 | } |
| 450 | |
| 451 | |
| 452 | /******************************************************************************* |
| 453 | * |
| 454 | * FUNCTION: AcpiNsExternalizeName |
| 455 | * |
| 456 | * PARAMETERS: InternalNameLength - Lenth of the internal name below |
| 457 | * InternalName - Internal representation of name |
| 458 | * ConvertedNameLength - Where the length is returned |
| 459 | * ConvertedName - Where the resulting external name |
| 460 | * is returned |
| 461 | * |
| 462 | * RETURN: Status |
| 463 | * |
| 464 | * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) |
| 465 | * to its external (printable) form (e.g. "\_PR_.CPU0") |
| 466 | * |
| 467 | ******************************************************************************/ |
| 468 | |
| 469 | ACPI_STATUS |
| 470 | AcpiNsExternalizeName ( |
| 471 | UINT32 InternalNameLength, |
| 472 | const char *InternalName, |
| 473 | UINT32 *ConvertedNameLength, |
| 474 | char **ConvertedName) |
| 475 | { |
| 476 | UINT32 NamesIndex = 0; |
| 477 | UINT32 NumSegments = 0; |
| 478 | UINT32 RequiredLength; |
| 479 | UINT32 PrefixLength = 0; |
| 480 | UINT32 i = 0; |
| 481 | UINT32 j = 0; |
| 482 | |
| 483 | |
| 484 | ACPI_FUNCTION_TRACE (NsExternalizeName); |
| 485 | |
| 486 | |
| 487 | if (!InternalNameLength || |
| 488 | !InternalName || |
| 489 | !ConvertedName) |
| 490 | { |
| 491 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 492 | } |
| 493 | |
| 494 | /* Check for a prefix (one '\' | one or more '^') */ |
| 495 | |
| 496 | switch (InternalName[0]) |
| 497 | { |
| 498 | case AML_ROOT_PREFIX: |
| 499 | |
| 500 | PrefixLength = 1; |
| 501 | break; |
| 502 | |
| 503 | case AML_PARENT_PREFIX: |
| 504 | |
| 505 | for (i = 0; i < InternalNameLength; i++) |
| 506 | { |
| 507 | if (ACPI_IS_PARENT_PREFIX (InternalName[i])) |
| 508 | { |
| 509 | PrefixLength = i + 1; |
| 510 | } |
| 511 | else |
| 512 | { |
| 513 | break; |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | if (i == InternalNameLength) |
| 518 | { |
| 519 | PrefixLength = i; |
| 520 | } |
| 521 | |
| 522 | break; |
| 523 | |
| 524 | default: |
| 525 | |
| 526 | break; |
| 527 | } |
| 528 | |
| 529 | /* |
| 530 | * Check for object names. Note that there could be 0-255 of these |
| 531 | * 4-byte elements. |
| 532 | */ |
| 533 | if (PrefixLength < InternalNameLength) |
| 534 | { |
| 535 | switch (InternalName[PrefixLength]) |
| 536 | { |
| 537 | case AML_MULTI_NAME_PREFIX_OP: |
| 538 | |
| 539 | /* <count> 4-byte names */ |
| 540 | |
| 541 | NamesIndex = PrefixLength + 2; |
| 542 | NumSegments = (UINT8) |
| 543 | InternalName[(ACPI_SIZE) PrefixLength + 1]; |
| 544 | break; |
| 545 | |
| 546 | case AML_DUAL_NAME_PREFIX: |
| 547 | |
| 548 | /* Two 4-byte names */ |
| 549 | |
| 550 | NamesIndex = PrefixLength + 1; |
| 551 | NumSegments = 2; |
| 552 | break; |
| 553 | |
| 554 | case 0: |
| 555 | |
| 556 | /* NullName */ |
| 557 | |
| 558 | NamesIndex = 0; |
| 559 | NumSegments = 0; |
| 560 | break; |
| 561 | |
| 562 | default: |
| 563 | |
| 564 | /* one 4-byte name */ |
| 565 | |
| 566 | NamesIndex = PrefixLength; |
| 567 | NumSegments = 1; |
| 568 | break; |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | /* |
| 573 | * Calculate the length of ConvertedName, which equals the length |
| 574 | * of the prefix, length of all object names, length of any required |
| 575 | * punctuation ('.') between object names, plus the NULL terminator. |
| 576 | */ |
| 577 | RequiredLength = PrefixLength + (4 * NumSegments) + |
| 578 | ((NumSegments > 0) ? (NumSegments - 1) : 0) + 1; |
| 579 | |
| 580 | /* |
| 581 | * Check to see if we're still in bounds. If not, there's a problem |
| 582 | * with InternalName (invalid format). |
| 583 | */ |
| 584 | if (RequiredLength > InternalNameLength) |
| 585 | { |
| 586 | ACPI_ERROR ((AE_INFO, "Invalid internal name" )); |
| 587 | return_ACPI_STATUS (AE_BAD_PATHNAME); |
| 588 | } |
| 589 | |
| 590 | /* Build the ConvertedName */ |
| 591 | |
| 592 | *ConvertedName = ACPI_ALLOCATE_ZEROED (RequiredLength); |
| 593 | if (!(*ConvertedName)) |
| 594 | { |
| 595 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 596 | } |
| 597 | |
| 598 | j = 0; |
| 599 | |
| 600 | for (i = 0; i < PrefixLength; i++) |
| 601 | { |
| 602 | (*ConvertedName)[j++] = InternalName[i]; |
| 603 | } |
| 604 | |
| 605 | if (NumSegments > 0) |
| 606 | { |
| 607 | for (i = 0; i < NumSegments; i++) |
| 608 | { |
| 609 | if (i > 0) |
| 610 | { |
| 611 | (*ConvertedName)[j++] = '.'; |
| 612 | } |
| 613 | |
| 614 | /* Copy and validate the 4-char name segment */ |
| 615 | |
| 616 | ACPI_MOVE_NAME (&(*ConvertedName)[j], |
| 617 | &InternalName[NamesIndex]); |
| 618 | AcpiUtRepairName (&(*ConvertedName)[j]); |
| 619 | |
| 620 | j += ACPI_NAME_SIZE; |
| 621 | NamesIndex += ACPI_NAME_SIZE; |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | if (ConvertedNameLength) |
| 626 | { |
| 627 | *ConvertedNameLength = (UINT32) RequiredLength; |
| 628 | } |
| 629 | |
| 630 | return_ACPI_STATUS (AE_OK); |
| 631 | } |
| 632 | |
| 633 | |
| 634 | /******************************************************************************* |
| 635 | * |
| 636 | * FUNCTION: AcpiNsValidateHandle |
| 637 | * |
| 638 | * PARAMETERS: Handle - Handle to be validated and typecast to a |
| 639 | * namespace node. |
| 640 | * |
| 641 | * RETURN: A pointer to a namespace node |
| 642 | * |
| 643 | * DESCRIPTION: Convert a namespace handle to a namespace node. Handles special |
| 644 | * cases for the root node. |
| 645 | * |
| 646 | * NOTE: Real integer handles would allow for more verification |
| 647 | * and keep all pointers within this subsystem - however this introduces |
| 648 | * more overhead and has not been necessary to this point. Drivers |
| 649 | * holding handles are typically notified before a node becomes invalid |
| 650 | * due to a table unload. |
| 651 | * |
| 652 | ******************************************************************************/ |
| 653 | |
| 654 | ACPI_NAMESPACE_NODE * |
| 655 | AcpiNsValidateHandle ( |
| 656 | ACPI_HANDLE Handle) |
| 657 | { |
| 658 | |
| 659 | ACPI_FUNCTION_ENTRY (); |
| 660 | |
| 661 | |
| 662 | /* Parameter validation */ |
| 663 | |
| 664 | if ((!Handle) || (Handle == ACPI_ROOT_OBJECT)) |
| 665 | { |
| 666 | return (AcpiGbl_RootNode); |
| 667 | } |
| 668 | |
| 669 | /* We can at least attempt to verify the handle */ |
| 670 | |
| 671 | if (ACPI_GET_DESCRIPTOR_TYPE (Handle) != ACPI_DESC_TYPE_NAMED) |
| 672 | { |
| 673 | return (NULL); |
| 674 | } |
| 675 | |
| 676 | return (ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle)); |
| 677 | } |
| 678 | |
| 679 | |
| 680 | /******************************************************************************* |
| 681 | * |
| 682 | * FUNCTION: AcpiNsTerminate |
| 683 | * |
| 684 | * PARAMETERS: none |
| 685 | * |
| 686 | * RETURN: none |
| 687 | * |
| 688 | * DESCRIPTION: free memory allocated for namespace and ACPI table storage. |
| 689 | * |
| 690 | ******************************************************************************/ |
| 691 | |
| 692 | void |
| 693 | AcpiNsTerminate ( |
| 694 | void) |
| 695 | { |
| 696 | ACPI_STATUS Status; |
| 697 | |
| 698 | |
| 699 | ACPI_FUNCTION_TRACE (NsTerminate); |
| 700 | |
| 701 | |
| 702 | #ifdef ACPI_EXEC_APP |
| 703 | { |
| 704 | ACPI_OPERAND_OBJECT *Prev; |
| 705 | ACPI_OPERAND_OBJECT *Next; |
| 706 | |
| 707 | /* Delete any module-level code blocks */ |
| 708 | |
| 709 | Next = AcpiGbl_ModuleCodeList; |
| 710 | while (Next) |
| 711 | { |
| 712 | Prev = Next; |
| 713 | Next = Next->Method.Mutex; |
| 714 | Prev->Method.Mutex = NULL; /* Clear the Mutex (cheated) field */ |
| 715 | AcpiUtRemoveReference (Prev); |
| 716 | } |
| 717 | } |
| 718 | #endif |
| 719 | |
| 720 | /* |
| 721 | * Free the entire namespace -- all nodes and all objects |
| 722 | * attached to the nodes |
| 723 | */ |
| 724 | AcpiNsDeleteNamespaceSubtree (AcpiGbl_RootNode); |
| 725 | |
| 726 | /* Delete any objects attached to the root node */ |
| 727 | |
| 728 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| 729 | if (ACPI_FAILURE (Status)) |
| 730 | { |
| 731 | return_VOID; |
| 732 | } |
| 733 | |
| 734 | AcpiNsDeleteNode (AcpiGbl_RootNode); |
| 735 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| 736 | |
| 737 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n" )); |
| 738 | return_VOID; |
| 739 | } |
| 740 | |
| 741 | |
| 742 | /******************************************************************************* |
| 743 | * |
| 744 | * FUNCTION: AcpiNsOpensScope |
| 745 | * |
| 746 | * PARAMETERS: Type - A valid namespace type |
| 747 | * |
| 748 | * RETURN: NEWSCOPE if the passed type "opens a name scope" according |
| 749 | * to the ACPI specification, else 0 |
| 750 | * |
| 751 | ******************************************************************************/ |
| 752 | |
| 753 | UINT32 |
| 754 | AcpiNsOpensScope ( |
| 755 | ACPI_OBJECT_TYPE Type) |
| 756 | { |
| 757 | ACPI_FUNCTION_ENTRY (); |
| 758 | |
| 759 | |
| 760 | if (Type > ACPI_TYPE_LOCAL_MAX) |
| 761 | { |
| 762 | /* type code out of range */ |
| 763 | |
| 764 | ACPI_WARNING ((AE_INFO, "Invalid Object Type 0x%X" , Type)); |
| 765 | return (ACPI_NS_NORMAL); |
| 766 | } |
| 767 | |
| 768 | return (((UINT32) AcpiGbl_NsProperties[Type]) & ACPI_NS_NEWSCOPE); |
| 769 | } |
| 770 | |
| 771 | |
| 772 | /******************************************************************************* |
| 773 | * |
| 774 | * FUNCTION: AcpiNsGetNodeUnlocked |
| 775 | * |
| 776 | * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The |
| 777 | * \ (backslash) and ^ (carat) prefixes, and the |
| 778 | * . (period) to separate segments are supported. |
| 779 | * PrefixNode - Root of subtree to be searched, or NS_ALL for the |
| 780 | * root of the name space. If Name is fully |
| 781 | * qualified (first INT8 is '\'), the passed value |
| 782 | * of Scope will not be accessed. |
| 783 | * Flags - Used to indicate whether to perform upsearch or |
| 784 | * not. |
| 785 | * ReturnNode - Where the Node is returned |
| 786 | * |
| 787 | * DESCRIPTION: Look up a name relative to a given scope and return the |
| 788 | * corresponding Node. NOTE: Scope can be null. |
| 789 | * |
| 790 | * MUTEX: Doesn't locks namespace |
| 791 | * |
| 792 | ******************************************************************************/ |
| 793 | |
| 794 | ACPI_STATUS |
| 795 | AcpiNsGetNodeUnlocked ( |
| 796 | ACPI_NAMESPACE_NODE *PrefixNode, |
| 797 | const char *Pathname, |
| 798 | UINT32 Flags, |
| 799 | ACPI_NAMESPACE_NODE **ReturnNode) |
| 800 | { |
| 801 | ACPI_GENERIC_STATE ScopeInfo; |
| 802 | ACPI_STATUS Status; |
| 803 | char *InternalPath; |
| 804 | |
| 805 | |
| 806 | ACPI_FUNCTION_TRACE_PTR (NsGetNodeUnlocked, ACPI_CAST_PTR (char, Pathname)); |
| 807 | |
| 808 | |
| 809 | /* Simplest case is a null pathname */ |
| 810 | |
| 811 | if (!Pathname) |
| 812 | { |
| 813 | *ReturnNode = PrefixNode; |
| 814 | if (!PrefixNode) |
| 815 | { |
| 816 | *ReturnNode = AcpiGbl_RootNode; |
| 817 | } |
| 818 | |
| 819 | return_ACPI_STATUS (AE_OK); |
| 820 | } |
| 821 | |
| 822 | /* Quick check for a reference to the root */ |
| 823 | |
| 824 | if (ACPI_IS_ROOT_PREFIX (Pathname[0]) && (!Pathname[1])) |
| 825 | { |
| 826 | *ReturnNode = AcpiGbl_RootNode; |
| 827 | return_ACPI_STATUS (AE_OK); |
| 828 | } |
| 829 | |
| 830 | /* Convert path to internal representation */ |
| 831 | |
| 832 | Status = AcpiNsInternalizeName (Pathname, &InternalPath); |
| 833 | if (ACPI_FAILURE (Status)) |
| 834 | { |
| 835 | return_ACPI_STATUS (Status); |
| 836 | } |
| 837 | |
| 838 | /* Setup lookup scope (search starting point) */ |
| 839 | |
| 840 | ScopeInfo.Scope.Node = PrefixNode; |
| 841 | |
| 842 | /* Lookup the name in the namespace */ |
| 843 | |
| 844 | Status = AcpiNsLookup (&ScopeInfo, InternalPath, ACPI_TYPE_ANY, |
| 845 | ACPI_IMODE_EXECUTE, (Flags | ACPI_NS_DONT_OPEN_SCOPE), |
| 846 | NULL, ReturnNode); |
| 847 | if (ACPI_FAILURE (Status)) |
| 848 | { |
| 849 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s, %s\n" , |
| 850 | Pathname, AcpiFormatException (Status))); |
| 851 | } |
| 852 | |
| 853 | ACPI_FREE (InternalPath); |
| 854 | return_ACPI_STATUS (Status); |
| 855 | } |
| 856 | |
| 857 | |
| 858 | /******************************************************************************* |
| 859 | * |
| 860 | * FUNCTION: AcpiNsGetNode |
| 861 | * |
| 862 | * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The |
| 863 | * \ (backslash) and ^ (carat) prefixes, and the |
| 864 | * . (period) to separate segments are supported. |
| 865 | * PrefixNode - Root of subtree to be searched, or NS_ALL for the |
| 866 | * root of the name space. If Name is fully |
| 867 | * qualified (first INT8 is '\'), the passed value |
| 868 | * of Scope will not be accessed. |
| 869 | * Flags - Used to indicate whether to perform upsearch or |
| 870 | * not. |
| 871 | * ReturnNode - Where the Node is returned |
| 872 | * |
| 873 | * DESCRIPTION: Look up a name relative to a given scope and return the |
| 874 | * corresponding Node. NOTE: Scope can be null. |
| 875 | * |
| 876 | * MUTEX: Locks namespace |
| 877 | * |
| 878 | ******************************************************************************/ |
| 879 | |
| 880 | ACPI_STATUS |
| 881 | AcpiNsGetNode ( |
| 882 | ACPI_NAMESPACE_NODE *PrefixNode, |
| 883 | const char *Pathname, |
| 884 | UINT32 Flags, |
| 885 | ACPI_NAMESPACE_NODE **ReturnNode) |
| 886 | { |
| 887 | ACPI_STATUS Status; |
| 888 | |
| 889 | |
| 890 | ACPI_FUNCTION_TRACE_PTR (NsGetNode, ACPI_CAST_PTR (char, Pathname)); |
| 891 | |
| 892 | |
| 893 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| 894 | if (ACPI_FAILURE (Status)) |
| 895 | { |
| 896 | return_ACPI_STATUS (Status); |
| 897 | } |
| 898 | |
| 899 | Status = AcpiNsGetNodeUnlocked (PrefixNode, Pathname, |
| 900 | Flags, ReturnNode); |
| 901 | |
| 902 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| 903 | return_ACPI_STATUS (Status); |
| 904 | } |
| 905 | |