exconfig.c revision 193249
1/****************************************************************************** 2 * 3 * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) 4 * $Revision: 1.103 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2007, 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 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#define __EXCONFIG_C__ 119 120#include <contrib/dev/acpica/acpi.h> 121#include <contrib/dev/acpica/acinterp.h> 122#include <contrib/dev/acpica/amlcode.h> 123#include <contrib/dev/acpica/acnamesp.h> 124#include <contrib/dev/acpica/acevents.h> 125#include <contrib/dev/acpica/actables.h> 126#include <contrib/dev/acpica/acdispat.h> 127 128 129#define _COMPONENT ACPI_EXECUTER 130 ACPI_MODULE_NAME ("exconfig") 131 132/* Local prototypes */ 133 134static ACPI_STATUS 135AcpiExAddTable ( 136 ACPI_NATIVE_UINT TableIndex, 137 ACPI_NAMESPACE_NODE *ParentNode, 138 ACPI_OPERAND_OBJECT **DdbHandle); 139 140 141/******************************************************************************* 142 * 143 * FUNCTION: AcpiExAddTable 144 * 145 * PARAMETERS: Table - Pointer to raw table 146 * ParentNode - Where to load the table (scope) 147 * DdbHandle - Where to return the table handle. 148 * 149 * RETURN: Status 150 * 151 * DESCRIPTION: Common function to Install and Load an ACPI table with a 152 * returned table handle. 153 * 154 ******************************************************************************/ 155 156static ACPI_STATUS 157AcpiExAddTable ( 158 ACPI_NATIVE_UINT TableIndex, 159 ACPI_NAMESPACE_NODE *ParentNode, 160 ACPI_OPERAND_OBJECT **DdbHandle) 161{ 162 ACPI_STATUS Status; 163 ACPI_OPERAND_OBJECT *ObjDesc; 164 165 166 ACPI_FUNCTION_TRACE (ExAddTable); 167 168 169 /* Create an object to be the table handle */ 170 171 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE); 172 if (!ObjDesc) 173 { 174 return_ACPI_STATUS (AE_NO_MEMORY); 175 } 176 177 /* Init the table handle */ 178 179 ObjDesc->Reference.Opcode = AML_LOAD_OP; 180 *DdbHandle = ObjDesc; 181 182 /* Install the new table into the local data structures */ 183 184 ObjDesc->Reference.Object = ACPI_CAST_PTR (void, TableIndex); 185 186 /* Add the table to the namespace */ 187 188 Status = AcpiNsLoadTable (TableIndex, ParentNode); 189 if (ACPI_FAILURE (Status)) 190 { 191 AcpiUtRemoveReference (ObjDesc); 192 *DdbHandle = NULL; 193 } 194 195 return_ACPI_STATUS (Status); 196} 197 198 199/******************************************************************************* 200 * 201 * FUNCTION: AcpiExLoadTableOp 202 * 203 * PARAMETERS: WalkState - Current state with operands 204 * ReturnDesc - Where to store the return object 205 * 206 * RETURN: Status 207 * 208 * DESCRIPTION: Load an ACPI table from the RSDT/XSDT 209 * 210 ******************************************************************************/ 211 212ACPI_STATUS 213AcpiExLoadTableOp ( 214 ACPI_WALK_STATE *WalkState, 215 ACPI_OPERAND_OBJECT **ReturnDesc) 216{ 217 ACPI_STATUS Status; 218 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 219 ACPI_NATIVE_UINT TableIndex; 220 ACPI_NAMESPACE_NODE *ParentNode; 221 ACPI_NAMESPACE_NODE *StartNode; 222 ACPI_NAMESPACE_NODE *ParameterNode = NULL; 223 ACPI_OPERAND_OBJECT *DdbHandle; 224 ACPI_TABLE_HEADER *Table; 225 226 227 ACPI_FUNCTION_TRACE (ExLoadTableOp); 228 229 230 /* Find the ACPI table in the RSDT/XSDT */ 231 232 Status = AcpiTbFindTable (Operand[0]->String.Pointer, 233 Operand[1]->String.Pointer, 234 Operand[2]->String.Pointer, &TableIndex); 235 if (ACPI_FAILURE (Status)) 236 { 237 if (Status != AE_NOT_FOUND) 238 { 239 return_ACPI_STATUS (Status); 240 } 241 242 /* Table not found, return an Integer=0 and AE_OK */ 243 244 DdbHandle = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 245 if (!DdbHandle) 246 { 247 return_ACPI_STATUS (AE_NO_MEMORY); 248 } 249 250 DdbHandle->Integer.Value = 0; 251 *ReturnDesc = DdbHandle; 252 253 return_ACPI_STATUS (AE_OK); 254 } 255 256 /* Default nodes */ 257 258 StartNode = WalkState->ScopeInfo->Scope.Node; 259 ParentNode = AcpiGbl_RootNode; 260 261 /* RootPath (optional parameter) */ 262 263 if (Operand[3]->String.Length > 0) 264 { 265 /* 266 * Find the node referenced by the RootPathString. This is the 267 * location within the namespace where the table will be loaded. 268 */ 269 Status = AcpiNsGetNode (StartNode, Operand[3]->String.Pointer, 270 ACPI_NS_SEARCH_PARENT, &ParentNode); 271 if (ACPI_FAILURE (Status)) 272 { 273 return_ACPI_STATUS (Status); 274 } 275 } 276 277 /* ParameterPath (optional parameter) */ 278 279 if (Operand[4]->String.Length > 0) 280 { 281 if ((Operand[4]->String.Pointer[0] != '\\') && 282 (Operand[4]->String.Pointer[0] != '^')) 283 { 284 /* 285 * Path is not absolute, so it will be relative to the node 286 * referenced by the RootPathString (or the NS root if omitted) 287 */ 288 StartNode = ParentNode; 289 } 290 291 /* Find the node referenced by the ParameterPathString */ 292 293 Status = AcpiNsGetNode (StartNode, Operand[4]->String.Pointer, 294 ACPI_NS_SEARCH_PARENT, &ParameterNode); 295 if (ACPI_FAILURE (Status)) 296 { 297 return_ACPI_STATUS (Status); 298 } 299 } 300 301 /* Load the table into the namespace */ 302 303 Status = AcpiExAddTable (TableIndex, ParentNode, &DdbHandle); 304 if (ACPI_FAILURE (Status)) 305 { 306 return_ACPI_STATUS (Status); 307 } 308 309 /* Parameter Data (optional) */ 310 311 if (ParameterNode) 312 { 313 /* Store the parameter data into the optional parameter object */ 314 315 Status = AcpiExStore (Operand[5], 316 ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParameterNode), 317 WalkState); 318 if (ACPI_FAILURE (Status)) 319 { 320 (void) AcpiExUnloadTable (DdbHandle); 321 return_ACPI_STATUS (Status); 322 } 323 } 324 325 Status = AcpiGetTableByIndex (TableIndex, &Table); 326 if (ACPI_SUCCESS (Status)) 327 { 328 ACPI_INFO ((AE_INFO, 329 "Dynamic OEM Table Load - [%4.4s] OemId [%6.6s] OemTableId [%8.8s]", 330 Table->Signature, Table->OemId, Table->OemTableId)); 331 } 332 333 *ReturnDesc = DdbHandle; 334 return_ACPI_STATUS (Status); 335} 336 337 338/******************************************************************************* 339 * 340 * FUNCTION: AcpiExLoadOp 341 * 342 * PARAMETERS: ObjDesc - Region or Buffer/Field where the table will be 343 * obtained 344 * Target - Where a handle to the table will be stored 345 * WalkState - Current state 346 * 347 * RETURN: Status 348 * 349 * DESCRIPTION: Load an ACPI table from a field or operation region 350 * 351 * NOTE: Region Fields (Field, BankField, IndexFields) are resolved to buffer 352 * objects before this code is reached. 353 * 354 * If source is an operation region, it must refer to SystemMemory, as 355 * per the ACPI specification. 356 * 357 ******************************************************************************/ 358 359ACPI_STATUS 360AcpiExLoadOp ( 361 ACPI_OPERAND_OBJECT *ObjDesc, 362 ACPI_OPERAND_OBJECT *Target, 363 ACPI_WALK_STATE *WalkState) 364{ 365 ACPI_OPERAND_OBJECT *DdbHandle; 366 ACPI_TABLE_DESC TableDesc; 367 ACPI_NATIVE_UINT TableIndex; 368 ACPI_STATUS Status; 369 370 371 ACPI_FUNCTION_TRACE (ExLoadOp); 372 373 374 ACPI_MEMSET (&TableDesc, 0, sizeof (ACPI_TABLE_DESC)); 375 TableDesc.Flags = ACPI_TABLE_ORIGIN_ALLOCATED; 376 377 /* Source Object can be either an OpRegion or a Buffer/Field */ 378 379 switch (ACPI_GET_OBJECT_TYPE (ObjDesc)) 380 { 381 case ACPI_TYPE_REGION: 382 383 /* Region must be SystemMemory (from ACPI spec) */ 384 385 if (ObjDesc->Region.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) 386 { 387 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 388 } 389 390 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load from Region %p %s\n", 391 ObjDesc, AcpiUtGetObjectTypeName (ObjDesc))); 392 393 /* 394 * If the Region Address and Length have not been previously evaluated, 395 * evaluate them now and save the results. 396 */ 397 if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) 398 { 399 Status = AcpiDsGetRegionArguments (ObjDesc); 400 if (ACPI_FAILURE (Status)) 401 { 402 return_ACPI_STATUS (Status); 403 } 404 } 405 406 TableDesc.Address = ObjDesc->Region.Address; 407 TableDesc.Length = ObjDesc->Region.Length; 408 TableDesc.Flags = ACPI_TABLE_ORIGIN_MAPPED; 409 break; 410 411 case ACPI_TYPE_BUFFER: /* Buffer or resolved RegionField */ 412 413 /* Simply extract the buffer from the buffer object */ 414 415 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load from Buffer or Field %p %s\n", 416 ObjDesc, AcpiUtGetObjectTypeName (ObjDesc))); 417 418 TableDesc.Pointer = ACPI_CAST_PTR (ACPI_TABLE_HEADER, 419 ObjDesc->Buffer.Pointer); 420 TableDesc.Length = TableDesc.Pointer->Length; 421 TableDesc.Flags = ACPI_TABLE_ORIGIN_ALLOCATED; 422 423 ObjDesc->Buffer.Pointer = NULL; 424 break; 425 426 default: 427 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 428 } 429 430 /* 431 * Install the new table into the local data structures 432 */ 433 Status = AcpiTbAddTable (&TableDesc, &TableIndex); 434 if (ACPI_FAILURE (Status)) 435 { 436 goto Cleanup; 437 } 438 439 Status = AcpiExAddTable (TableIndex, AcpiGbl_RootNode, &DdbHandle); 440 if (ACPI_FAILURE (Status)) 441 { 442 /* On error, TablePtr was deallocated above */ 443 444 return_ACPI_STATUS (Status); 445 } 446 447 /* Store the DdbHandle into the Target operand */ 448 449 Status = AcpiExStore (DdbHandle, Target, WalkState); 450 if (ACPI_FAILURE (Status)) 451 { 452 (void) AcpiExUnloadTable (DdbHandle); 453 454 /* TablePtr was deallocated above */ 455 456 return_ACPI_STATUS (Status); 457 } 458 459Cleanup: 460 if (ACPI_FAILURE (Status)) 461 { 462 AcpiTbDeleteTable (&TableDesc); 463 } 464 return_ACPI_STATUS (Status); 465} 466 467 468/******************************************************************************* 469 * 470 * FUNCTION: AcpiExUnloadTable 471 * 472 * PARAMETERS: DdbHandle - Handle to a previously loaded table 473 * 474 * RETURN: Status 475 * 476 * DESCRIPTION: Unload an ACPI table 477 * 478 ******************************************************************************/ 479 480ACPI_STATUS 481AcpiExUnloadTable ( 482 ACPI_OPERAND_OBJECT *DdbHandle) 483{ 484 ACPI_STATUS Status = AE_OK; 485 ACPI_OPERAND_OBJECT *TableDesc = DdbHandle; 486 ACPI_NATIVE_UINT TableIndex; 487 488 489 ACPI_FUNCTION_TRACE (ExUnloadTable); 490 491 492 /* 493 * Validate the handle 494 * Although the handle is partially validated in AcpiExReconfiguration(), 495 * when it calls AcpiExResolveOperands(), the handle is more completely 496 * validated here. 497 */ 498 if ((!DdbHandle) || 499 (ACPI_GET_DESCRIPTOR_TYPE (DdbHandle) != ACPI_DESC_TYPE_OPERAND) || 500 (ACPI_GET_OBJECT_TYPE (DdbHandle) != ACPI_TYPE_LOCAL_REFERENCE)) 501 { 502 return_ACPI_STATUS (AE_BAD_PARAMETER); 503 } 504 505 /* Get the table index from the DdbHandle */ 506 507 TableIndex = (ACPI_NATIVE_UINT) TableDesc->Reference.Object; 508 509 /* 510 * Delete the entire namespace under this table Node 511 * (Offset contains the TableId) 512 */ 513 AcpiTbDeleteNamespaceByOwner (TableIndex); 514 AcpiTbReleaseOwnerId (TableIndex); 515 516 AcpiTbSetTableLoadedFlag (TableIndex, FALSE); 517 518 /* Delete the table descriptor (DdbHandle) */ 519 520 AcpiUtRemoveReference (TableDesc); 521 return_ACPI_STATUS (Status); 522} 523 524