1/******************************************************************************* 2 * 3 * Module Name: nssearch - Namespace search
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4 * $Revision: 84 $
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4 * $Revision: 86 $ |
5 * 6 ******************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117#define __NSSEARCH_C__ 118 119#include "acpi.h"
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120#include "amlcode.h"
121#include "acinterp.h"
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120#include "acnamesp.h" 121 122 123#define _COMPONENT ACPI_NAMESPACE 124 ACPI_MODULE_NAME ("nssearch") 125 126 127/******************************************************************************* 128 * 129 * FUNCTION: AcpiNsSearchNode 130 * 131 * PARAMETERS: *TargetName - Ascii ACPI name to search for 132 * *Node - Starting table where search will begin 133 * Type - Object type to match 134 * **ReturnNode - Where the matched Named obj is returned 135 * 136 * RETURN: Status 137 * 138 * DESCRIPTION: Search a single namespace table. Performs a simple search, 139 * does not add entries or search parents. 140 * 141 * 142 * Named object lists are built (and subsequently dumped) in the 143 * order in which the names are encountered during the namespace load; 144 * 145 * All namespace searching is linear in this implementation, but 146 * could be easily modified to support any improved search 147 * algorithm. However, the linear search was chosen for simplicity 148 * and because the trees are small and the other interpreter 149 * execution overhead is relatively high. 150 * 151 ******************************************************************************/ 152 153ACPI_STATUS 154AcpiNsSearchNode ( 155 UINT32 TargetName, 156 ACPI_NAMESPACE_NODE *Node, 157 ACPI_OBJECT_TYPE Type, 158 ACPI_NAMESPACE_NODE **ReturnNode) 159{ 160 ACPI_NAMESPACE_NODE *NextNode; 161 162 163 ACPI_FUNCTION_TRACE ("NsSearchNode"); 164 165 166#ifdef ACPI_DEBUG 167 if (ACPI_LV_NAMES & AcpiDbgLevel) 168 { 169 NATIVE_CHAR *ScopeName; 170 171 ScopeName = AcpiNsGetExternalPathname (Node); 172 if (ScopeName) 173 { 174 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Searching %s [%p] For %4.4s (type %s)\n", 175 ScopeName, Node, (char *) &TargetName, AcpiUtGetTypeName (Type))); 176 177 ACPI_MEM_FREE (ScopeName); 178 } 179 } 180#endif 181 182 /* 183 * Search for name in this table, which is to say that we must search 184 * for the name among the children of this object 185 */ 186 NextNode = Node->Child; 187 while (NextNode) 188 { 189 /* Check for match against the name */ 190 191 if (NextNode->Name.Integer == TargetName) 192 { 193 /* 194 * Found matching entry. Capture the type if appropriate, before 195 * returning the entry. 196 * 197 * The DefFieldDefn and BankFieldDefn cases are actually looking up 198 * the Region in which the field will be defined 199 */ 200 if ((INTERNAL_TYPE_FIELD_DEFN == Type) || 201 (INTERNAL_TYPE_BANK_FIELD_DEFN == Type)) 202 { 203 Type = ACPI_TYPE_REGION; 204 } 205 206 /* 207 * Scope, DefAny, and IndexFieldDefn are bogus "types" which do not 208 * actually have anything to do with the type of the name being 209 * looked up. For any other value of Type, if the type stored in 210 * the entry is Any (i.e. unknown), save the actual type. 211 */ 212 if (Type != INTERNAL_TYPE_SCOPE && 213 Type != INTERNAL_TYPE_DEF_ANY && 214 Type != INTERNAL_TYPE_INDEX_FIELD_DEFN && 215 NextNode->Type == ACPI_TYPE_ANY) 216 { 217 NextNode->Type = (UINT8) Type; 218 } 219 220 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 221 "Name %4.4s Type [%s] found at %p\n", 222 (char *) &TargetName, AcpiUtGetTypeName (NextNode->Type), NextNode)); 223 224 *ReturnNode = NextNode; 225 return_ACPI_STATUS (AE_OK); 226 } 227 228 /* 229 * The last entry in the list points back to the parent, 230 * so a flag is used to indicate the end-of-list 231 */ 232 if (NextNode->Flags & ANOBJ_END_OF_PEER_LIST) 233 { 234 /* Searched entire list, we are done */ 235 236 break; 237 } 238 239 /* Didn't match name, move on to the next peer object */ 240 241 NextNode = NextNode->Peer; 242 } 243 244 /* Searched entire table, not found */ 245 246 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Name %4.4s Type [%s] not found at %p\n", 247 (char *) &TargetName, AcpiUtGetTypeName (Type), NextNode)); 248 249 return_ACPI_STATUS (AE_NOT_FOUND); 250} 251 252 253/******************************************************************************* 254 * 255 * FUNCTION: AcpiNsSearchParentTree 256 * 257 * PARAMETERS: *TargetName - Ascii ACPI name to search for 258 * *Node - Starting table where search will begin 259 * Type - Object type to match 260 * **ReturnNode - Where the matched Named Obj is returned 261 * 262 * RETURN: Status 263 * 264 * DESCRIPTION: Called when a name has not been found in the current namespace 265 * table. Before adding it or giving up, ACPI scope rules require 266 * searching enclosing scopes in cases identified by AcpiNsLocal(). 267 * 268 * "A name is located by finding the matching name in the current 269 * name space, and then in the parent name space. If the parent 270 * name space does not contain the name, the search continues 271 * recursively until either the name is found or the name space 272 * does not have a parent (the root of the name space). This 273 * indicates that the name is not found" (From ACPI Specification, 274 * section 5.3) 275 * 276 ******************************************************************************/ 277 278static ACPI_STATUS 279AcpiNsSearchParentTree ( 280 UINT32 TargetName, 281 ACPI_NAMESPACE_NODE *Node, 282 ACPI_OBJECT_TYPE Type, 283 ACPI_NAMESPACE_NODE **ReturnNode) 284{ 285 ACPI_STATUS Status; 286 ACPI_NAMESPACE_NODE *ParentNode; 287 288 289 ACPI_FUNCTION_TRACE ("NsSearchParentTree"); 290 291 292 ParentNode = AcpiNsGetParentNode (Node); 293 294 /* 295 * If there is no parent (at the root) or type is "local", we won't be 296 * searching the parent tree. 297 */ 298 if ((AcpiNsLocal (Type)) || 299 (!ParentNode)) 300 { 301 if (!ParentNode) 302 { 303 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "[%4.4s] has no parent\n", 304 (char *) &TargetName)); 305 } 306 307 if (AcpiNsLocal (Type)) 308 {
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311 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "[%4.4s] type [%s] must be local to this scope (no parent search)\n",
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309 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 310 "[%4.4s] type [%s] must be local to this scope (no parent search)\n", |
311 (char *) &TargetName, AcpiUtGetTypeName (Type))); 312 } 313 314 return_ACPI_STATUS (AE_NOT_FOUND); 315 } 316 317 /* Search the parent tree */ 318 319 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Searching parent for %4.4s\n", (char *) &TargetName)); 320 321 /* 322 * Search parents until found the target or we have backed up to 323 * the root 324 */ 325 while (ParentNode) 326 { 327 /* 328 * Search parent scope. Use TYPE_ANY because we don't care about the 329 * object type at this point, we only care about the existence of 330 * the actual name we are searching for. Typechecking comes later. 331 */ 332 Status = AcpiNsSearchNode (TargetName, ParentNode, 333 ACPI_TYPE_ANY, ReturnNode); 334 if (ACPI_SUCCESS (Status)) 335 { 336 return_ACPI_STATUS (Status); 337 } 338 339 /* 340 * Not found here, go up another level 341 * (until we reach the root) 342 */ 343 ParentNode = AcpiNsGetParentNode (ParentNode); 344 } 345 346 /* Not found in parent tree */ 347 348 return_ACPI_STATUS (AE_NOT_FOUND); 349} 350 351 352/******************************************************************************* 353 * 354 * FUNCTION: AcpiNsSearchAndEnter 355 * 356 * PARAMETERS: TargetName - Ascii ACPI name to search for (4 chars) 357 * WalkState - Current state of the walk 358 * *Node - Starting table where search will begin 359 * InterpreterMode - Add names only in MODE_LoadPassX. 360 * Otherwise,search only. 361 * Type - Object type to match 362 * Flags - Flags describing the search restrictions 363 * **ReturnNode - Where the Node is returned 364 * 365 * RETURN: Status 366 * 367 * DESCRIPTION: Search for a name segment in a single name table, 368 * optionally adding it if it is not found. If the passed 369 * Type is not Any and the type previously stored in the 370 * entry was Any (i.e. unknown), update the stored type. 371 * 372 * In IMODE_EXECUTE, search only. 373 * In other modes, search and add if not found. 374 * 375 ******************************************************************************/ 376 377ACPI_STATUS 378AcpiNsSearchAndEnter ( 379 UINT32 TargetName, 380 ACPI_WALK_STATE *WalkState, 381 ACPI_NAMESPACE_NODE *Node, 382 ACPI_INTERPRETER_MODE InterpreterMode, 383 ACPI_OBJECT_TYPE Type, 384 UINT32 Flags, 385 ACPI_NAMESPACE_NODE **ReturnNode) 386{ 387 ACPI_STATUS Status; 388 ACPI_NAMESPACE_NODE *NewNode; 389 390 391 ACPI_FUNCTION_TRACE ("NsSearchAndEnter"); 392 393 394 /* Parameter validation */ 395 396 if (!Node || !TargetName || !ReturnNode) 397 { 398 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null param- Table %p Name %X Return %p\n", 399 Node, TargetName, ReturnNode)); 400 401 ACPI_REPORT_ERROR (("NsSearchAndEnter: bad (null) parameter\n")); 402 return_ACPI_STATUS (AE_BAD_PARAMETER); 403 } 404 405 /* Name must consist of printable characters */ 406 407 if (!AcpiUtValidAcpiName (TargetName)) 408 { 409 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "*** Bad character in name: %08x *** \n", 410 TargetName)); 411 412 ACPI_REPORT_ERROR (("NsSearchAndEnter: Bad character in ACPI Name\n")); 413 return_ACPI_STATUS (AE_BAD_CHARACTER); 414 } 415 416 /* Try to find the name in the table specified by the caller */ 417 418 *ReturnNode = ACPI_ENTRY_NOT_FOUND; 419 Status = AcpiNsSearchNode (TargetName, Node, Type, ReturnNode); 420 if (Status != AE_NOT_FOUND) 421 { 422 /* 423 * If we found it AND the request specifies that a find is an error, 424 * return the error 425 */ 426 if ((Status == AE_OK) && 427 (Flags & ACPI_NS_ERROR_IF_FOUND)) 428 { 429 Status = AE_ALREADY_EXISTS; 430 } 431 432 /* 433 * Either found it or there was an error 434 * -- finished either way 435 */ 436 return_ACPI_STATUS (Status); 437 } 438 439 /* 440 * The name was not found. If we are NOT performing the 441 * first pass (name entry) of loading the namespace, search 442 * the parent tree (all the way to the root if necessary.) 443 * We don't want to perform the parent search when the 444 * namespace is actually being loaded. We want to perform 445 * the search when namespace references are being resolved 446 * (load pass 2) and during the execution phase. 447 */ 448 if ((InterpreterMode != ACPI_IMODE_LOAD_PASS1) && 449 (Flags & ACPI_NS_SEARCH_PARENT)) 450 { 451 /* 452 * Not found in table - search parent tree according 453 * to ACPI specification 454 */ 455 Status = AcpiNsSearchParentTree (TargetName, Node, 456 Type, ReturnNode); 457 if (ACPI_SUCCESS (Status)) 458 { 459 return_ACPI_STATUS (Status); 460 } 461 } 462 463 /* 464 * In execute mode, just search, never add names. Exit now. 465 */ 466 if (InterpreterMode == ACPI_IMODE_EXECUTE) 467 { 468 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%4.4s Not found in %p [Not adding]\n", 469 (char *) &TargetName, Node)); 470 471 return_ACPI_STATUS (AE_NOT_FOUND); 472 } 473 474 /* Create the new named object */ 475 476 NewNode = AcpiNsCreateNode (TargetName); 477 if (!NewNode) 478 { 479 return_ACPI_STATUS (AE_NO_MEMORY); 480 } 481 482 /* Install the new object into the parent's list of children */ 483 484 AcpiNsInstallNode (WalkState, Node, NewNode, Type); 485 *ReturnNode = NewNode; 486 487 return_ACPI_STATUS (AE_OK); 488} 489
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