1 /****************************************************************************** 2 * 3 * Module Name: tbxfload - Table load/unload external interfaces 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2013, 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 __TBXFLOAD_C__ 117 118 #include "acpi.h" 119 #include "accommon.h" 120 #include "acnamesp.h" 121 #include "actables.h" 122 123 #define _COMPONENT ACPI_TABLES 124 ACPI_MODULE_NAME ("tbxfload") 125 126 /* Local prototypes */ 127 128 static ACPI_STATUS 129 AcpiTbLoadNamespace ( 130 void); 131 132 133 /******************************************************************************* 134 * 135 * FUNCTION: AcpiLoadTables 136 * 137 * PARAMETERS: None 138 * 139 * RETURN: Status 140 * 141 * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT 142 * 143 ******************************************************************************/ 144 145 ACPI_STATUS 146 AcpiLoadTables ( 147 void) 148 { 149 ACPI_STATUS Status; 150 151 152 ACPI_FUNCTION_TRACE (AcpiLoadTables); 153 154 155 /* Load the namespace from the tables */ 156 157 Status = AcpiTbLoadNamespace (); 158 if (ACPI_FAILURE (Status)) 159 { 160 ACPI_EXCEPTION ((AE_INFO, Status, 161 "While loading namespace from ACPI tables")); 162 } 163 164 return_ACPI_STATUS (Status); 165 } 166 167 ACPI_EXPORT_SYMBOL (AcpiLoadTables) 168 169 170 /******************************************************************************* 171 * 172 * FUNCTION: AcpiTbLoadNamespace 173 * 174 * PARAMETERS: None 175 * 176 * RETURN: Status 177 * 178 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in 179 * the RSDT/XSDT. 180 * 181 ******************************************************************************/ 182 183 static ACPI_STATUS 184 AcpiTbLoadNamespace ( 185 void) 186 { 187 ACPI_STATUS Status; 188 UINT32 i; 189 ACPI_TABLE_HEADER *NewDsdt; 190 191 192 ACPI_FUNCTION_TRACE (TbLoadNamespace); 193 194 195 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); 196 197 /* 198 * Load the namespace. The DSDT is required, but any SSDT and 199 * PSDT tables are optional. Verify the DSDT. 200 */ 201 if (!AcpiGbl_RootTableList.CurrentTableCount || 202 !ACPI_COMPARE_NAME ( 203 &(AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Signature), 204 ACPI_SIG_DSDT) || 205 ACPI_FAILURE (AcpiTbVerifyTable ( 206 &AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT]))) 207 { 208 Status = AE_NO_ACPI_TABLES; 209 goto UnlockAndExit; 210 } 211 212 /* 213 * Save the DSDT pointer for simple access. This is the mapped memory 214 * address. We must take care here because the address of the .Tables 215 * array can change dynamically as tables are loaded at run-time. Note: 216 * .Pointer field is not validated until after call to AcpiTbVerifyTable. 217 */ 218 AcpiGbl_DSDT = AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Pointer; 219 220 /* 221 * Optionally copy the entire DSDT to local memory (instead of simply 222 * mapping it.) There are some BIOSs that corrupt or replace the original 223 * DSDT, creating the need for this option. Default is FALSE, do not copy 224 * the DSDT. 225 */ 226 if (AcpiGbl_CopyDsdtLocally) 227 { 228 NewDsdt = AcpiTbCopyDsdt (ACPI_TABLE_INDEX_DSDT); 229 if (NewDsdt) 230 { 231 AcpiGbl_DSDT = NewDsdt; 232 } 233 } 234 235 /* 236 * Save the original DSDT header for detection of table corruption 237 * and/or replacement of the DSDT from outside the OS. 238 */ 239 ACPI_MEMCPY (&AcpiGbl_OriginalDsdtHeader, AcpiGbl_DSDT, 240 sizeof (ACPI_TABLE_HEADER)); 241 242 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); 243 244 /* Load and parse tables */ 245 246 Status = AcpiNsLoadTable (ACPI_TABLE_INDEX_DSDT, AcpiGbl_RootNode); 247 if (ACPI_FAILURE (Status)) 248 { 249 return_ACPI_STATUS (Status); 250 } 251 252 /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */ 253 254 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); 255 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i) 256 { 257 if ((!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature), 258 ACPI_SIG_SSDT) && 259 !ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature), 260 ACPI_SIG_PSDT)) || 261 ACPI_FAILURE (AcpiTbVerifyTable ( 262 &AcpiGbl_RootTableList.Tables[i]))) 263 { 264 continue; 265 } 266 267 /* 268 * Optionally do not load any SSDTs from the RSDT/XSDT. This can 269 * be useful for debugging ACPI problems on some machines. 270 */ 271 if (AcpiGbl_DisableSsdtTableLoad) 272 { 273 ACPI_INFO ((AE_INFO, "Ignoring %4.4s at %p", 274 AcpiGbl_RootTableList.Tables[i].Signature.Ascii, 275 ACPI_CAST_PTR (void, AcpiGbl_RootTableList.Tables[i].Address))); 276 continue; 277 } 278 279 /* Ignore errors while loading tables, get as many as possible */ 280 281 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); 282 (void) AcpiNsLoadTable (i, AcpiGbl_RootNode); 283 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); 284 } 285 286 ACPI_INFO ((AE_INFO, "All ACPI Tables successfully acquired")); 287 288 UnlockAndExit: 289 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); 290 return_ACPI_STATUS (Status); 291 } 292 293 294 /******************************************************************************* 295 * 296 * FUNCTION: AcpiLoadTable 297 * 298 * PARAMETERS: Table - Pointer to a buffer containing the ACPI 299 * table to be loaded. 300 * 301 * RETURN: Status 302 * 303 * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must 304 * be a valid ACPI table with a valid ACPI table header. 305 * Note1: Mainly intended to support hotplug addition of SSDTs. 306 * Note2: Does not copy the incoming table. User is responsible 307 * to ensure that the table is not deleted or unmapped. 308 * 309 ******************************************************************************/ 310 311 ACPI_STATUS 312 AcpiLoadTable ( 313 ACPI_TABLE_HEADER *Table) 314 { 315 ACPI_STATUS Status; 316 ACPI_TABLE_DESC TableDesc; 317 UINT32 TableIndex; 318 319 320 ACPI_FUNCTION_TRACE (AcpiLoadTable); 321 322 323 /* Parameter validation */ 324 325 if (!Table) 326 { 327 return_ACPI_STATUS (AE_BAD_PARAMETER); 328 } 329 330 /* Init local table descriptor */ 331 332 ACPI_MEMSET (&TableDesc, 0, sizeof (ACPI_TABLE_DESC)); 333 TableDesc.Address = ACPI_PTR_TO_PHYSADDR (Table); 334 TableDesc.Pointer = Table; 335 TableDesc.Length = Table->Length; 336 TableDesc.Flags = ACPI_TABLE_ORIGIN_UNKNOWN; 337 338 /* Must acquire the interpreter lock during this operation */ 339 340 Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER); 341 if (ACPI_FAILURE (Status)) 342 { 343 return_ACPI_STATUS (Status); 344 } 345 346 /* Install the table and load it into the namespace */ 347 348 ACPI_INFO ((AE_INFO, "Host-directed Dynamic ACPI Table Load:")); 349 Status = AcpiTbAddTable (&TableDesc, &TableIndex); 350 if (ACPI_FAILURE (Status)) 351 { 352 goto UnlockAndExit; 353 } 354 355 Status = AcpiNsLoadTable (TableIndex, AcpiGbl_RootNode); 356 357 /* Invoke table handler if present */ 358 359 if (AcpiGbl_TableHandler) 360 { 361 (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table, 362 AcpiGbl_TableHandlerContext); 363 } 364 365 UnlockAndExit: 366 (void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER); 367 return_ACPI_STATUS (Status); 368 } 369 370 ACPI_EXPORT_SYMBOL (AcpiLoadTable) 371 372 373 /******************************************************************************* 374 * 375 * FUNCTION: AcpiUnloadParentTable 376 * 377 * PARAMETERS: Object - Handle to any namespace object owned by 378 * the table to be unloaded 379 * 380 * RETURN: Status 381 * 382 * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads 383 * the table and deletes all namespace objects associated with 384 * that table. Unloading of the DSDT is not allowed. 385 * Note: Mainly intended to support hotplug removal of SSDTs. 386 * 387 ******************************************************************************/ 388 389 ACPI_STATUS 390 AcpiUnloadParentTable ( 391 ACPI_HANDLE Object) 392 { 393 ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Object); 394 ACPI_STATUS Status = AE_NOT_EXIST; 395 ACPI_OWNER_ID OwnerId; 396 UINT32 i; 397 398 399 ACPI_FUNCTION_TRACE (AcpiUnloadParentTable); 400 401 402 /* Parameter validation */ 403 404 if (!Object) 405 { 406 return_ACPI_STATUS (AE_BAD_PARAMETER); 407 } 408 409 /* 410 * The node OwnerId is currently the same as the parent table ID. 411 * However, this could change in the future. 412 */ 413 OwnerId = Node->OwnerId; 414 if (!OwnerId) 415 { 416 /* OwnerId==0 means DSDT is the owner. DSDT cannot be unloaded */ 417 418 return_ACPI_STATUS (AE_TYPE); 419 } 420 421 /* Must acquire the interpreter lock during this operation */ 422 423 Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER); 424 if (ACPI_FAILURE (Status)) 425 { 426 return_ACPI_STATUS (Status); 427 } 428 429 /* Find the table in the global table list */ 430 431 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++) 432 { 433 if (OwnerId != AcpiGbl_RootTableList.Tables[i].OwnerId) 434 { 435 continue; 436 } 437 438 /* 439 * Allow unload of SSDT and OEMx tables only. Do not allow unload 440 * of the DSDT. No other types of tables should get here, since 441 * only these types can contain AML and thus are the only types 442 * that can create namespace objects. 443 */ 444 if (ACPI_COMPARE_NAME ( 445 AcpiGbl_RootTableList.Tables[i].Signature.Ascii, 446 ACPI_SIG_DSDT)) 447 { 448 Status = AE_TYPE; 449 break; 450 } 451 452 /* Ensure the table is actually loaded */ 453 454 if (!AcpiTbIsTableLoaded (i)) 455 { 456 Status = AE_NOT_EXIST; 457 break; 458 } 459 460 /* Invoke table handler if present */ 461 462 if (AcpiGbl_TableHandler) 463 { 464 (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_UNLOAD, 465 AcpiGbl_RootTableList.Tables[i].Pointer, 466 AcpiGbl_TableHandlerContext); 467 } 468 469 /* 470 * Delete all namespace objects owned by this table. Note that 471 * these objects can appear anywhere in the namespace by virtue 472 * of the AML "Scope" operator. Thus, we need to track ownership 473 * by an ID, not simply a position within the hierarchy. 474 */ 475 Status = AcpiTbDeleteNamespaceByOwner (i); 476 if (ACPI_FAILURE (Status)) 477 { 478 break; 479 } 480 481 Status = AcpiTbReleaseOwnerId (i); 482 AcpiTbSetTableLoadedFlag (i, FALSE); 483 break; 484 } 485 486 (void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER); 487 return_ACPI_STATUS (Status); 488 } 489 490 ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable) 491