1 /******************************************************************************* 2 * 3 * Module Name: nseval - Object evaluation, includes control method execution 4 * 5 ******************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2017, 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 * 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 * Alternatively, you may choose to be licensed under the terms of the 118 * following license: 119 * 120 * Redistribution and use in source and binary forms, with or without 121 * modification, are permitted provided that the following conditions 122 * are met: 123 * 1. Redistributions of source code must retain the above copyright 124 * notice, this list of conditions, and the following disclaimer, 125 * without modification. 126 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 127 * substantially similar to the "NO WARRANTY" disclaimer below 128 * ("Disclaimer") and any redistribution must be conditioned upon 129 * including a substantially similar Disclaimer requirement for further 130 * binary redistribution. 131 * 3. Neither the names of the above-listed copyright holders nor the names 132 * of any contributors may be used to endorse or promote products derived 133 * from this software without specific prior written permission. 134 * 135 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 136 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 137 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 138 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 139 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 140 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 141 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 142 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 143 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 144 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 145 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 146 * 147 * Alternatively, you may choose to be licensed under the terms of the 148 * GNU General Public License ("GPL") version 2 as published by the Free 149 * Software Foundation. 150 * 151 *****************************************************************************/ 152 153 #include <contrib/dev/acpica/include/acpi.h> 154 #include <contrib/dev/acpica/include/accommon.h> 155 #include <contrib/dev/acpica/include/acparser.h> 156 #include <contrib/dev/acpica/include/acinterp.h> 157 #include <contrib/dev/acpica/include/acnamesp.h> 158 159 160 #define _COMPONENT ACPI_NAMESPACE 161 ACPI_MODULE_NAME ("nseval") 162 163 /* Local prototypes */ 164 165 static void 166 AcpiNsExecModuleCode ( 167 ACPI_OPERAND_OBJECT *MethodObj, 168 ACPI_EVALUATE_INFO *Info); 169 170 171 /******************************************************************************* 172 * 173 * FUNCTION: AcpiNsEvaluate 174 * 175 * PARAMETERS: Info - Evaluation info block, contains these fields 176 * and more: 177 * PrefixNode - Prefix or Method/Object Node to execute 178 * RelativePath - Name of method to execute, If NULL, the 179 * Node is the object to execute 180 * Parameters - List of parameters to pass to the method, 181 * terminated by NULL. Params itself may be 182 * NULL if no parameters are being passed. 183 * ParameterType - Type of Parameter list 184 * ReturnObject - Where to put method's return value (if 185 * any). If NULL, no value is returned. 186 * Flags - ACPI_IGNORE_RETURN_VALUE to delete return 187 * 188 * RETURN: Status 189 * 190 * DESCRIPTION: Execute a control method or return the current value of an 191 * ACPI namespace object. 192 * 193 * MUTEX: Locks interpreter 194 * 195 ******************************************************************************/ 196 197 ACPI_STATUS 198 AcpiNsEvaluate ( 199 ACPI_EVALUATE_INFO *Info) 200 { 201 ACPI_STATUS Status; 202 203 204 ACPI_FUNCTION_TRACE (NsEvaluate); 205 206 207 if (!Info) 208 { 209 return_ACPI_STATUS (AE_BAD_PARAMETER); 210 } 211 212 if (!Info->Node) 213 { 214 /* 215 * Get the actual namespace node for the target object if we 216 * need to. Handles these cases: 217 * 218 * 1) Null node, valid pathname from root (absolute path) 219 * 2) Node and valid pathname (path relative to Node) 220 * 3) Node, Null pathname 221 */ 222 Status = AcpiNsGetNode (Info->PrefixNode, Info->RelativePathname, 223 ACPI_NS_NO_UPSEARCH, &Info->Node); 224 if (ACPI_FAILURE (Status)) 225 { 226 return_ACPI_STATUS (Status); 227 } 228 } 229 230 /* 231 * For a method alias, we must grab the actual method node so that 232 * proper scoping context will be established before execution. 233 */ 234 if (AcpiNsGetType (Info->Node) == ACPI_TYPE_LOCAL_METHOD_ALIAS) 235 { 236 Info->Node = ACPI_CAST_PTR ( 237 ACPI_NAMESPACE_NODE, Info->Node->Object); 238 } 239 240 /* Complete the info block initialization */ 241 242 Info->ReturnObject = NULL; 243 Info->NodeFlags = Info->Node->Flags; 244 Info->ObjDesc = AcpiNsGetAttachedObject (Info->Node); 245 246 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n", 247 Info->RelativePathname, Info->Node, 248 AcpiNsGetAttachedObject (Info->Node))); 249 250 /* Get info if we have a predefined name (_HID, etc.) */ 251 252 Info->Predefined = AcpiUtMatchPredefinedMethod (Info->Node->Name.Ascii); 253 254 /* Get the full pathname to the object, for use in warning messages */ 255 256 Info->FullPathname = AcpiNsGetNormalizedPathname (Info->Node, TRUE); 257 if (!Info->FullPathname) 258 { 259 return_ACPI_STATUS (AE_NO_MEMORY); 260 } 261 262 /* Count the number of arguments being passed in */ 263 264 Info->ParamCount = 0; 265 if (Info->Parameters) 266 { 267 while (Info->Parameters[Info->ParamCount]) 268 { 269 Info->ParamCount++; 270 } 271 272 /* Warn on impossible argument count */ 273 274 if (Info->ParamCount > ACPI_METHOD_NUM_ARGS) 275 { 276 ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS, 277 "Excess arguments (%u) - using only %u", 278 Info->ParamCount, ACPI_METHOD_NUM_ARGS)); 279 280 Info->ParamCount = ACPI_METHOD_NUM_ARGS; 281 } 282 } 283 284 /* 285 * For predefined names: Check that the declared argument count 286 * matches the ACPI spec -- otherwise this is a BIOS error. 287 */ 288 AcpiNsCheckAcpiCompliance (Info->FullPathname, Info->Node, 289 Info->Predefined); 290 291 /* 292 * For all names: Check that the incoming argument count for 293 * this method/object matches the actual ASL/AML definition. 294 */ 295 AcpiNsCheckArgumentCount (Info->FullPathname, Info->Node, 296 Info->ParamCount, Info->Predefined); 297 298 /* For predefined names: Typecheck all incoming arguments */ 299 300 AcpiNsCheckArgumentTypes (Info); 301 302 /* 303 * Three major evaluation cases: 304 * 305 * 1) Object types that cannot be evaluated by definition 306 * 2) The object is a control method -- execute it 307 * 3) The object is not a method -- just return it's current value 308 */ 309 switch (AcpiNsGetType (Info->Node)) 310 { 311 case ACPI_TYPE_DEVICE: 312 case ACPI_TYPE_EVENT: 313 case ACPI_TYPE_MUTEX: 314 case ACPI_TYPE_REGION: 315 case ACPI_TYPE_THERMAL: 316 case ACPI_TYPE_LOCAL_SCOPE: 317 /* 318 * 1) Disallow evaluation of certain object types. For these, 319 * object evaluation is undefined and not supported. 320 */ 321 ACPI_ERROR ((AE_INFO, 322 "%s: Evaluation of object type [%s] is not supported", 323 Info->FullPathname, 324 AcpiUtGetTypeName (Info->Node->Type))); 325 326 Status = AE_TYPE; 327 goto Cleanup; 328 329 case ACPI_TYPE_METHOD: 330 /* 331 * 2) Object is a control method - execute it 332 */ 333 334 /* Verify that there is a method object associated with this node */ 335 336 if (!Info->ObjDesc) 337 { 338 ACPI_ERROR ((AE_INFO, "%s: Method has no attached sub-object", 339 Info->FullPathname)); 340 Status = AE_NULL_OBJECT; 341 goto Cleanup; 342 } 343 344 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 345 "**** Execute method [%s] at AML address %p length %X\n", 346 Info->FullPathname, 347 Info->ObjDesc->Method.AmlStart + 1, 348 Info->ObjDesc->Method.AmlLength - 1)); 349 350 /* 351 * Any namespace deletion must acquire both the namespace and 352 * interpreter locks to ensure that no thread is using the portion of 353 * the namespace that is being deleted. 354 * 355 * Execute the method via the interpreter. The interpreter is locked 356 * here before calling into the AML parser 357 */ 358 AcpiExEnterInterpreter (); 359 Status = AcpiPsExecuteMethod (Info); 360 AcpiExExitInterpreter (); 361 break; 362 363 default: 364 /* 365 * 3) All other non-method objects -- get the current object value 366 */ 367 368 /* 369 * Some objects require additional resolution steps (e.g., the Node 370 * may be a field that must be read, etc.) -- we can't just grab 371 * the object out of the node. 372 * 373 * Use ResolveNodeToValue() to get the associated value. 374 * 375 * NOTE: we can get away with passing in NULL for a walk state because 376 * the Node is guaranteed to not be a reference to either a method 377 * local or a method argument (because this interface is never called 378 * from a running method.) 379 * 380 * Even though we do not directly invoke the interpreter for object 381 * resolution, we must lock it because we could access an OpRegion. 382 * The OpRegion access code assumes that the interpreter is locked. 383 */ 384 AcpiExEnterInterpreter (); 385 386 /* TBD: ResolveNodeToValue has a strange interface, fix */ 387 388 Info->ReturnObject = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->Node); 389 390 Status = AcpiExResolveNodeToValue (ACPI_CAST_INDIRECT_PTR ( 391 ACPI_NAMESPACE_NODE, &Info->ReturnObject), NULL); 392 AcpiExExitInterpreter (); 393 394 if (ACPI_FAILURE (Status)) 395 { 396 Info->ReturnObject = NULL; 397 goto Cleanup; 398 } 399 400 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returned object %p [%s]\n", 401 Info->ReturnObject, 402 AcpiUtGetObjectTypeName (Info->ReturnObject))); 403 404 Status = AE_CTRL_RETURN_VALUE; /* Always has a "return value" */ 405 break; 406 } 407 408 /* 409 * For predefined names, check the return value against the ACPI 410 * specification. Some incorrect return value types are repaired. 411 */ 412 (void) AcpiNsCheckReturnValue (Info->Node, Info, Info->ParamCount, 413 Status, &Info->ReturnObject); 414 415 /* Check if there is a return value that must be dealt with */ 416 417 if (Status == AE_CTRL_RETURN_VALUE) 418 { 419 /* If caller does not want the return value, delete it */ 420 421 if (Info->Flags & ACPI_IGNORE_RETURN_VALUE) 422 { 423 AcpiUtRemoveReference (Info->ReturnObject); 424 Info->ReturnObject = NULL; 425 } 426 427 /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */ 428 429 Status = AE_OK; 430 } 431 432 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 433 "*** Completed evaluation of object %s ***\n", 434 Info->RelativePathname)); 435 436 Cleanup: 437 /* 438 * Namespace was unlocked by the handling AcpiNs* function, so we 439 * just free the pathname and return 440 */ 441 ACPI_FREE (Info->FullPathname); 442 Info->FullPathname = NULL; 443 return_ACPI_STATUS (Status); 444 } 445 446 447 /******************************************************************************* 448 * 449 * FUNCTION: AcpiNsExecModuleCodeList 450 * 451 * PARAMETERS: None 452 * 453 * RETURN: None. Exceptions during method execution are ignored, since 454 * we cannot abort a table load. 455 * 456 * DESCRIPTION: Execute all elements of the global module-level code list. 457 * Each element is executed as a single control method. 458 * 459 ******************************************************************************/ 460 461 void 462 AcpiNsExecModuleCodeList ( 463 void) 464 { 465 ACPI_OPERAND_OBJECT *Prev; 466 ACPI_OPERAND_OBJECT *Next; 467 ACPI_EVALUATE_INFO *Info; 468 UINT32 MethodCount = 0; 469 470 471 ACPI_FUNCTION_TRACE (NsExecModuleCodeList); 472 473 474 /* Exit now if the list is empty */ 475 476 Next = AcpiGbl_ModuleCodeList; 477 if (!Next) 478 { 479 return_VOID; 480 } 481 482 /* Allocate the evaluation information block */ 483 484 Info = ACPI_ALLOCATE (sizeof (ACPI_EVALUATE_INFO)); 485 if (!Info) 486 { 487 return_VOID; 488 } 489 490 /* Walk the list, executing each "method" */ 491 492 while (Next) 493 { 494 Prev = Next; 495 Next = Next->Method.Mutex; 496 497 /* Clear the link field and execute the method */ 498 499 Prev->Method.Mutex = NULL; 500 AcpiNsExecModuleCode (Prev, Info); 501 MethodCount++; 502 503 /* Delete the (temporary) method object */ 504 505 AcpiUtRemoveReference (Prev); 506 } 507 508 ACPI_INFO (( 509 "Executed %u blocks of module-level executable AML code", 510 MethodCount)); 511 512 ACPI_FREE (Info); 513 AcpiGbl_ModuleCodeList = NULL; 514 return_VOID; 515 } 516 517 518 /******************************************************************************* 519 * 520 * FUNCTION: AcpiNsExecModuleCode 521 * 522 * PARAMETERS: MethodObj - Object container for the module-level code 523 * Info - Info block for method evaluation 524 * 525 * RETURN: None. Exceptions during method execution are ignored, since 526 * we cannot abort a table load. 527 * 528 * DESCRIPTION: Execute a control method containing a block of module-level 529 * executable AML code. The control method is temporarily 530 * installed to the root node, then evaluated. 531 * 532 ******************************************************************************/ 533 534 static void 535 AcpiNsExecModuleCode ( 536 ACPI_OPERAND_OBJECT *MethodObj, 537 ACPI_EVALUATE_INFO *Info) 538 { 539 ACPI_OPERAND_OBJECT *ParentObj; 540 ACPI_NAMESPACE_NODE *ParentNode; 541 ACPI_OBJECT_TYPE Type; 542 ACPI_STATUS Status; 543 544 545 ACPI_FUNCTION_TRACE (NsExecModuleCode); 546 547 548 /* 549 * Get the parent node. We cheat by using the NextObject field 550 * of the method object descriptor. 551 */ 552 ParentNode = ACPI_CAST_PTR ( 553 ACPI_NAMESPACE_NODE, MethodObj->Method.NextObject); 554 Type = AcpiNsGetType (ParentNode); 555 556 /* 557 * Get the region handler and save it in the method object. We may need 558 * this if an operation region declaration causes a _REG method to be run. 559 * 560 * We can't do this in AcpiPsLinkModuleCode because 561 * AcpiGbl_RootNode->Object is NULL at PASS1. 562 */ 563 if ((Type == ACPI_TYPE_DEVICE) && ParentNode->Object) 564 { 565 MethodObj->Method.Dispatch.Handler = 566 ParentNode->Object->Device.Handler; 567 } 568 569 /* Must clear NextObject (AcpiNsAttachObject needs the field) */ 570 571 MethodObj->Method.NextObject = NULL; 572 573 /* Initialize the evaluation information block */ 574 575 memset (Info, 0, sizeof (ACPI_EVALUATE_INFO)); 576 Info->PrefixNode = ParentNode; 577 578 /* 579 * Get the currently attached parent object. Add a reference, 580 * because the ref count will be decreased when the method object 581 * is installed to the parent node. 582 */ 583 ParentObj = AcpiNsGetAttachedObject (ParentNode); 584 if (ParentObj) 585 { 586 AcpiUtAddReference (ParentObj); 587 } 588 589 /* Install the method (module-level code) in the parent node */ 590 591 Status = AcpiNsAttachObject (ParentNode, MethodObj, ACPI_TYPE_METHOD); 592 if (ACPI_FAILURE (Status)) 593 { 594 goto Exit; 595 } 596 597 /* Execute the parent node as a control method */ 598 599 Status = AcpiNsEvaluate (Info); 600 601 ACPI_DEBUG_PRINT ((ACPI_DB_INIT_NAMES, 602 "Executed module-level code at %p\n", 603 MethodObj->Method.AmlStart)); 604 605 /* Delete a possible implicit return value (in slack mode) */ 606 607 if (Info->ReturnObject) 608 { 609 AcpiUtRemoveReference (Info->ReturnObject); 610 } 611 612 /* Detach the temporary method object */ 613 614 AcpiNsDetachObject (ParentNode); 615 616 /* Restore the original parent object */ 617 618 if (ParentObj) 619 { 620 Status = AcpiNsAttachObject (ParentNode, ParentObj, Type); 621 } 622 else 623 { 624 ParentNode->Type = (UINT8) Type; 625 } 626 627 Exit: 628 if (ParentObj) 629 { 630 AcpiUtRemoveReference (ParentObj); 631 } 632 return_VOID; 633 } 634