1 /****************************************************************************** 2 * 3 * Module Name: nsload - namespace loading/expanding/contracting procedures 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 *****************************************************************************/ 115 116 #define __NSLOAD_C__ 117 118 #include "acpi.h" 119 #include "accommon.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