1 /****************************************************************************** 2 * 3 * Module Name: nsload - namespace loading/expanding/contracting procedures 4 * $Revision: 1.83 $ 5 * 6 *****************************************************************************/ 7 8 /****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2008, 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 #include "actables.h" 123 124 125 #define _COMPONENT ACPI_NAMESPACE 126 ACPI_MODULE_NAME ("nsload") 127 128 /* Local prototypes */ 129 130 #ifdef ACPI_FUTURE_IMPLEMENTATION 131 ACPI_STATUS 132 AcpiNsUnloadNamespace ( 133 ACPI_HANDLE Handle); 134 135 static ACPI_STATUS 136 AcpiNsDeleteSubtree ( 137 ACPI_HANDLE StartHandle); 138 #endif 139 140 141 #ifndef ACPI_NO_METHOD_EXECUTION 142 /******************************************************************************* 143 * 144 * FUNCTION: AcpiNsLoadTable 145 * 146 * PARAMETERS: TableIndex - Index for table to be loaded 147 * Node - Owning NS node 148 * 149 * RETURN: Status 150 * 151 * DESCRIPTION: Load one ACPI table into the namespace 152 * 153 ******************************************************************************/ 154 155 ACPI_STATUS 156 AcpiNsLoadTable ( 157 UINT32 TableIndex, 158 ACPI_NAMESPACE_NODE *Node) 159 { 160 ACPI_STATUS Status; 161 162 163 ACPI_FUNCTION_TRACE (NsLoadTable); 164 165 166 /* 167 * Parse the table and load the namespace with all named 168 * objects found within. Control methods are NOT parsed 169 * at this time. In fact, the control methods cannot be 170 * parsed until the entire namespace is loaded, because 171 * if a control method makes a forward reference (call) 172 * to another control method, we can't continue parsing 173 * because we don't know how many arguments to parse next! 174 */ 175 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 176 if (ACPI_FAILURE (Status)) 177 { 178 return_ACPI_STATUS (Status); 179 } 180 181 /* If table already loaded into namespace, just return */ 182 183 if (AcpiTbIsTableLoaded (TableIndex)) 184 { 185 Status = AE_ALREADY_EXISTS; 186 goto Unlock; 187 } 188 189 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 190 "**** Loading table into namespace ****\n")); 191 192 Status = AcpiTbAllocateOwnerId (TableIndex); 193 if (ACPI_FAILURE (Status)) 194 { 195 goto Unlock; 196 } 197 198 Status = AcpiNsParseTable (TableIndex, Node); 199 if (ACPI_SUCCESS (Status)) 200 { 201 AcpiTbSetTableLoadedFlag (TableIndex, TRUE); 202 } 203 else 204 { 205 (void) AcpiTbReleaseOwnerId (TableIndex); 206 } 207 208 Unlock: 209 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 210 211 if (ACPI_FAILURE (Status)) 212 { 213 return_ACPI_STATUS (Status); 214 } 215 216 /* 217 * Now we can parse the control methods. We always parse 218 * them here for a sanity check, and if configured for 219 * just-in-time parsing, we delete the control method 220 * parse trees. 221 */ 222 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 223 "**** Begin Table Method Parsing and Object Initialization ****\n")); 224 225 Status = AcpiDsInitializeObjects (TableIndex, Node); 226 227 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 228 "**** Completed Table Method Parsing and Object Initialization ****\n")); 229 230 return_ACPI_STATUS (Status); 231 } 232 233 234 #ifdef ACPI_OBSOLETE_FUNCTIONS 235 /******************************************************************************* 236 * 237 * FUNCTION: AcpiLoadNamespace 238 * 239 * PARAMETERS: None 240 * 241 * RETURN: Status 242 * 243 * DESCRIPTION: Load the name space from what ever is pointed to by DSDT. 244 * (DSDT points to either the BIOS or a buffer.) 245 * 246 ******************************************************************************/ 247 248 ACPI_STATUS 249 AcpiNsLoadNamespace ( 250 void) 251 { 252 ACPI_STATUS Status; 253 254 255 ACPI_FUNCTION_TRACE (AcpiLoadNameSpace); 256 257 258 /* There must be at least a DSDT installed */ 259 260 if (AcpiGbl_DSDT == NULL) 261 { 262 ACPI_ERROR ((AE_INFO, "DSDT is not in memory")); 263 return_ACPI_STATUS (AE_NO_ACPI_TABLES); 264 } 265 266 /* 267 * Load the namespace. The DSDT is required, 268 * but the SSDT and PSDT tables are optional. 269 */ 270 Status = AcpiNsLoadTableByType (ACPI_TABLE_ID_DSDT); 271 if (ACPI_FAILURE (Status)) 272 { 273 return_ACPI_STATUS (Status); 274 } 275 276 /* Ignore exceptions from these */ 277 278 (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_SSDT); 279 (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_PSDT); 280 281 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 282 "ACPI Namespace successfully loaded at root %p\n", 283 AcpiGbl_RootNode)); 284 285 return_ACPI_STATUS (Status); 286 } 287 #endif 288 289 #ifdef ACPI_FUTURE_IMPLEMENTATION 290 /******************************************************************************* 291 * 292 * FUNCTION: AcpiNsDeleteSubtree 293 * 294 * PARAMETERS: StartHandle - Handle in namespace where search begins 295 * 296 * RETURNS Status 297 * 298 * DESCRIPTION: Walks the namespace starting at the given handle and deletes 299 * all objects, entries, and scopes in the entire subtree. 300 * 301 * Namespace/Interpreter should be locked or the subsystem should 302 * be in shutdown before this routine is called. 303 * 304 ******************************************************************************/ 305 306 static ACPI_STATUS 307 AcpiNsDeleteSubtree ( 308 ACPI_HANDLE StartHandle) 309 { 310 ACPI_STATUS Status; 311 ACPI_HANDLE ChildHandle; 312 ACPI_HANDLE ParentHandle; 313 ACPI_HANDLE NextChildHandle; 314 ACPI_HANDLE Dummy; 315 UINT32 Level; 316 317 318 ACPI_FUNCTION_TRACE (NsDeleteSubtree); 319 320 321 ParentHandle = StartHandle; 322 ChildHandle = NULL; 323 Level = 1; 324 325 /* 326 * Traverse the tree of objects until we bubble back up 327 * to where we started. 328 */ 329 while (Level > 0) 330 { 331 /* Attempt to get the next object in this scope */ 332 333 Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle, 334 ChildHandle, &NextChildHandle); 335 336 ChildHandle = NextChildHandle; 337 338 /* Did we get a new object? */ 339 340 if (ACPI_SUCCESS (Status)) 341 { 342 /* Check if this object has any children */ 343 344 if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, ChildHandle, 345 NULL, &Dummy))) 346 { 347 /* 348 * There is at least one child of this object, 349 * visit the object 350 */ 351 Level++; 352 ParentHandle = ChildHandle; 353 ChildHandle = NULL; 354 } 355 } 356 else 357 { 358 /* 359 * No more children in this object, go back up to 360 * the object's parent 361 */ 362 Level--; 363 364 /* Delete all children now */ 365 366 AcpiNsDeleteChildren (ChildHandle); 367 368 ChildHandle = ParentHandle; 369 Status = AcpiGetParent (ParentHandle, &ParentHandle); 370 if (ACPI_FAILURE (Status)) 371 { 372 return_ACPI_STATUS (Status); 373 } 374 } 375 } 376 377 /* Now delete the starting object, and we are done */ 378 379 AcpiNsDeleteNode (ChildHandle); 380 381 return_ACPI_STATUS (AE_OK); 382 } 383 384 385 /******************************************************************************* 386 * 387 * FUNCTION: AcpiNsUnloadNameSpace 388 * 389 * PARAMETERS: Handle - Root of namespace subtree to be deleted 390 * 391 * RETURN: Status 392 * 393 * DESCRIPTION: Shrinks the namespace, typically in response to an undocking 394 * event. Deletes an entire subtree starting from (and 395 * including) the given handle. 396 * 397 ******************************************************************************/ 398 399 ACPI_STATUS 400 AcpiNsUnloadNamespace ( 401 ACPI_HANDLE Handle) 402 { 403 ACPI_STATUS Status; 404 405 406 ACPI_FUNCTION_TRACE (NsUnloadNameSpace); 407 408 409 /* Parameter validation */ 410 411 if (!AcpiGbl_RootNode) 412 { 413 return_ACPI_STATUS (AE_NO_NAMESPACE); 414 } 415 416 if (!Handle) 417 { 418 return_ACPI_STATUS (AE_BAD_PARAMETER); 419 } 420 421 /* This function does the real work */ 422 423 Status = AcpiNsDeleteSubtree (Handle); 424 425 return_ACPI_STATUS (Status); 426 } 427 #endif 428 #endif 429 430