nsload.c revision 114237
1/****************************************************************************** 2 * 3 * Module Name: nsload - namespace loading/expanding/contracting procedures 4 * $Revision: 64 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2003, 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 __NSLOAD_C__ 118 119#include "acpi.h" 120#include "acnamesp.h" 121#include "acdispat.h" 122 123 124#define _COMPONENT ACPI_NAMESPACE 125 ACPI_MODULE_NAME ("nsload") 126 127 128#ifndef ACPI_NO_METHOD_EXECUTION 129 130/******************************************************************************* 131 * 132 * FUNCTION: AcpiNsLoadTable 133 * 134 * PARAMETERS: TableDesc - Descriptor for table to be loaded 135 * Node - Owning NS node 136 * 137 * RETURN: Status 138 * 139 * DESCRIPTION: Load one ACPI table into the namespace 140 * 141 ******************************************************************************/ 142 143ACPI_STATUS 144AcpiNsLoadTable ( 145 ACPI_TABLE_DESC *TableDesc, 146 ACPI_NAMESPACE_NODE *Node) 147{ 148 ACPI_STATUS Status; 149 150 151 ACPI_FUNCTION_TRACE ("NsLoadTable"); 152 153 154 /* Check if table contains valid AML (must be DSDT, PSDT, SSDT, etc.) */ 155 156 if (!(AcpiGbl_AcpiTableData[TableDesc->Type].Flags & ACPI_TABLE_EXECUTABLE)) 157 { 158 /* Just ignore this table */ 159 160 return_ACPI_STATUS (AE_OK); 161 } 162 163 /* Check validity of the AML start and length */ 164 165 if (!TableDesc->AmlStart) 166 { 167 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null AML pointer\n")); 168 return_ACPI_STATUS (AE_BAD_PARAMETER); 169 } 170 171 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AML block at %p\n", TableDesc->AmlStart)); 172 173 /* Ignore table if there is no AML contained within */ 174 175 if (!TableDesc->AmlLength) 176 { 177 ACPI_REPORT_WARNING (("Zero-length AML block in table [%4.4s]\n", TableDesc->Pointer->Signature)); 178 return_ACPI_STATUS (AE_OK); 179 } 180 181 /* 182 * Parse the table and load the namespace with all named 183 * objects found within. Control methods are NOT parsed 184 * at this time. In fact, the control methods cannot be 185 * parsed until the entire namespace is loaded, because 186 * if a control method makes a forward reference (call) 187 * to another control method, we can't continue parsing 188 * because we don't know how many arguments to parse next! 189 */ 190 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "**** Loading table into namespace ****\n")); 191 192 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 193 if (ACPI_FAILURE (Status)) 194 { 195 return_ACPI_STATUS (Status); 196 } 197 198 Status = AcpiNsParseTable (TableDesc, Node->Child); 199 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 200 201 if (ACPI_FAILURE (Status)) 202 { 203 return_ACPI_STATUS (Status); 204 } 205 206 /* 207 * Now we can parse the control methods. We always parse 208 * them here for a sanity check, and if configured for 209 * just-in-time parsing, we delete the control method 210 * parse trees. 211 */ 212 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 213 "**** Begin Table Method Parsing and Object Initialization ****\n")); 214 215 Status = AcpiDsInitializeObjects (TableDesc, Node); 216 217 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 218 "**** Completed Table Method Parsing and Object Initialization ****\n")); 219 220 return_ACPI_STATUS (Status); 221} 222 223 224/******************************************************************************* 225 * 226 * FUNCTION: AcpiNsLoadTableByType 227 * 228 * PARAMETERS: TableType - Id of the table type to load 229 * 230 * RETURN: Status 231 * 232 * DESCRIPTION: Load an ACPI table or tables into the namespace. All tables 233 * of the given type are loaded. The mechanism allows this 234 * routine to be called repeatedly. 235 * 236 ******************************************************************************/ 237 238ACPI_STATUS 239AcpiNsLoadTableByType ( 240 ACPI_TABLE_TYPE TableType) 241{ 242 UINT32 i; 243 ACPI_STATUS Status; 244 ACPI_TABLE_DESC *TableDesc; 245 246 247 ACPI_FUNCTION_TRACE ("NsLoadTableByType"); 248 249 250 Status = AcpiUtAcquireMutex (ACPI_MTX_TABLES); 251 if (ACPI_FAILURE (Status)) 252 { 253 return_ACPI_STATUS (Status); 254 } 255 256 /* 257 * Table types supported are: 258 * DSDT (one), SSDT/PSDT (multiple) 259 */ 260 switch (TableType) 261 { 262 case ACPI_TABLE_DSDT: 263 264 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Loading DSDT\n")); 265 266 TableDesc = &AcpiGbl_AcpiTables[ACPI_TABLE_DSDT]; 267 268 /* If table already loaded into namespace, just return */ 269 270 if (TableDesc->LoadedIntoNamespace) 271 { 272 goto UnlockAndExit; 273 } 274 275 TableDesc->TableId = TABLE_ID_DSDT; 276 277 /* Now load the single DSDT */ 278 279 Status = AcpiNsLoadTable (TableDesc, AcpiGbl_RootNode); 280 if (ACPI_SUCCESS (Status)) 281 { 282 TableDesc->LoadedIntoNamespace = TRUE; 283 } 284 285 break; 286 287 288 case ACPI_TABLE_SSDT: 289 290 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Loading %d SSDTs\n", 291 AcpiGbl_AcpiTables[ACPI_TABLE_SSDT].Count)); 292 293 /* 294 * Traverse list of SSDT tables 295 */ 296 TableDesc = &AcpiGbl_AcpiTables[ACPI_TABLE_SSDT]; 297 for (i = 0; i < AcpiGbl_AcpiTables[ACPI_TABLE_SSDT].Count; i++) 298 { 299 /* 300 * Only attempt to load table if it is not 301 * already loaded! 302 */ 303 if (!TableDesc->LoadedIntoNamespace) 304 { 305 Status = AcpiNsLoadTable (TableDesc, AcpiGbl_RootNode); 306 if (ACPI_FAILURE (Status)) 307 { 308 break; 309 } 310 311 TableDesc->LoadedIntoNamespace = TRUE; 312 } 313 314 TableDesc = TableDesc->Next; 315 } 316 break; 317 318 319 case ACPI_TABLE_PSDT: 320 321 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Loading %d PSDTs\n", 322 AcpiGbl_AcpiTables[ACPI_TABLE_PSDT].Count)); 323 324 /* 325 * Traverse list of PSDT tables 326 */ 327 TableDesc = &AcpiGbl_AcpiTables[ACPI_TABLE_PSDT]; 328 329 for (i = 0; i < AcpiGbl_AcpiTables[ACPI_TABLE_PSDT].Count; i++) 330 { 331 /* Only attempt to load table if it is not already loaded! */ 332 333 if (!TableDesc->LoadedIntoNamespace) 334 { 335 Status = AcpiNsLoadTable (TableDesc, AcpiGbl_RootNode); 336 if (ACPI_FAILURE (Status)) 337 { 338 break; 339 } 340 341 TableDesc->LoadedIntoNamespace = TRUE; 342 } 343 344 TableDesc = TableDesc->Next; 345 } 346 347 break; 348 349 350 default: 351 Status = AE_SUPPORT; 352 break; 353 } 354 355 356UnlockAndExit: 357 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); 358 return_ACPI_STATUS (Status); 359} 360 361 362/******************************************************************************* 363 * 364 * FUNCTION: AcpiLoadNamespace 365 * 366 * PARAMETERS: None 367 * 368 * RETURN: Status 369 * 370 * DESCRIPTION: Load the name space from what ever is pointed to by DSDT. 371 * (DSDT points to either the BIOS or a buffer.) 372 * 373 ******************************************************************************/ 374 375ACPI_STATUS 376AcpiNsLoadNamespace ( 377 void) 378{ 379 ACPI_STATUS Status; 380 381 382 ACPI_FUNCTION_TRACE ("AcpiLoadNameSpace"); 383 384 385 /* There must be at least a DSDT installed */ 386 387 if (AcpiGbl_DSDT == NULL) 388 { 389 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "DSDT is not in memory\n")); 390 return_ACPI_STATUS (AE_NO_ACPI_TABLES); 391 } 392 393 /* 394 * Load the namespace. The DSDT is required, 395 * but the SSDT and PSDT tables are optional. 396 */ 397 Status = AcpiNsLoadTableByType (ACPI_TABLE_DSDT); 398 if (ACPI_FAILURE (Status)) 399 { 400 return_ACPI_STATUS (Status); 401 } 402 403 /* Ignore exceptions from these */ 404 405 (void) AcpiNsLoadTableByType (ACPI_TABLE_SSDT); 406 (void) AcpiNsLoadTableByType (ACPI_TABLE_PSDT); 407 408 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 409 "ACPI Namespace successfully loaded at root %p\n", 410 AcpiGbl_RootNode)); 411 412 return_ACPI_STATUS (Status); 413} 414 415 416/******************************************************************************* 417 * 418 * FUNCTION: AcpiNsDeleteSubtree 419 * 420 * PARAMETERS: StartHandle - Handle in namespace where search begins 421 * 422 * RETURNS Status 423 * 424 * DESCRIPTION: Walks the namespace starting at the given handle and deletes 425 * all objects, entries, and scopes in the entire subtree. 426 * 427 * Namespace/Interpreter should be locked or the subsystem should 428 * be in shutdown before this routine is called. 429 * 430 ******************************************************************************/ 431 432ACPI_STATUS 433AcpiNsDeleteSubtree ( 434 ACPI_HANDLE StartHandle) 435{ 436 ACPI_STATUS Status; 437 ACPI_HANDLE ChildHandle; 438 ACPI_HANDLE ParentHandle; 439 ACPI_HANDLE NextChildHandle; 440 ACPI_HANDLE Dummy; 441 UINT32 Level; 442 443 444 ACPI_FUNCTION_TRACE ("NsDeleteSubtree"); 445 446 447 ParentHandle = StartHandle; 448 ChildHandle = 0; 449 Level = 1; 450 451 /* 452 * Traverse the tree of objects until we bubble back up 453 * to where we started. 454 */ 455 while (Level > 0) 456 { 457 /* Attempt to get the next object in this scope */ 458 459 Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle, 460 ChildHandle, &NextChildHandle); 461 462 ChildHandle = NextChildHandle; 463 464 /* Did we get a new object? */ 465 466 if (ACPI_SUCCESS (Status)) 467 { 468 /* Check if this object has any children */ 469 470 if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, ChildHandle, 471 0, &Dummy))) 472 { 473 /* 474 * There is at least one child of this object, 475 * visit the object 476 */ 477 Level++; 478 ParentHandle = ChildHandle; 479 ChildHandle = 0; 480 } 481 } 482 else 483 { 484 /* 485 * No more children in this object, go back up to 486 * the object's parent 487 */ 488 Level--; 489 490 /* Delete all children now */ 491 492 AcpiNsDeleteChildren (ChildHandle); 493 494 ChildHandle = ParentHandle; 495 Status = AcpiGetParent (ParentHandle, &ParentHandle); 496 if (ACPI_FAILURE (Status)) 497 { 498 return_ACPI_STATUS (Status); 499 } 500 } 501 } 502 503 /* Now delete the starting object, and we are done */ 504 505 AcpiNsDeleteNode (ChildHandle); 506 507 return_ACPI_STATUS (AE_OK); 508} 509 510 511/******************************************************************************* 512 * 513 * FUNCTION: AcpiNsUnloadNameSpace 514 * 515 * PARAMETERS: Handle - Root of namespace subtree to be deleted 516 * 517 * RETURN: Status 518 * 519 * DESCRIPTION: Shrinks the namespace, typically in response to an undocking 520 * event. Deletes an entire subtree starting from (and 521 * including) the given handle. 522 * 523 ******************************************************************************/ 524 525ACPI_STATUS 526AcpiNsUnloadNamespace ( 527 ACPI_HANDLE Handle) 528{ 529 ACPI_STATUS Status; 530 531 532 ACPI_FUNCTION_TRACE ("NsUnloadNameSpace"); 533 534 535 /* Parameter validation */ 536 537 if (!AcpiGbl_RootNode) 538 { 539 return_ACPI_STATUS (AE_NO_NAMESPACE); 540 } 541 542 if (!Handle) 543 { 544 return_ACPI_STATUS (AE_BAD_PARAMETER); 545 } 546 547 /* This function does the real work */ 548 549 Status = AcpiNsDeleteSubtree (Handle); 550 551 return_ACPI_STATUS (Status); 552} 553 554#endif 555 556