1 /******************************************************************************* 2 * 3 * Module Name: utmisc - common utility procedures 4 * 5 ******************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, 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 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "acpi.h" 153 #include "accommon.h" 154 #include "acnamesp.h" 155 156 157 #define _COMPONENT ACPI_UTILITIES 158 ACPI_MODULE_NAME ("utmisc") 159 160 161 /******************************************************************************* 162 * 163 * FUNCTION: AcpiUtIsPciRootBridge 164 * 165 * PARAMETERS: Id - The HID/CID in string format 166 * 167 * RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge 168 * 169 * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID. 170 * 171 ******************************************************************************/ 172 173 BOOLEAN 174 AcpiUtIsPciRootBridge ( 175 char *Id) 176 { 177 178 /* 179 * Check if this is a PCI root bridge. 180 * ACPI 3.0+: check for a PCI Express root also. 181 */ 182 if (!(strcmp (Id, 183 PCI_ROOT_HID_STRING)) || 184 185 !(strcmp (Id, 186 PCI_EXPRESS_ROOT_HID_STRING))) 187 { 188 return (TRUE); 189 } 190 191 return (FALSE); 192 } 193 194 195 #if (defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP || defined ACPI_NAMES_APP) 196 /******************************************************************************* 197 * 198 * FUNCTION: AcpiUtIsAmlTable 199 * 200 * PARAMETERS: Table - An ACPI table 201 * 202 * RETURN: TRUE if table contains executable AML; FALSE otherwise 203 * 204 * DESCRIPTION: Check ACPI Signature for a table that contains AML code. 205 * Currently, these are DSDT,SSDT,PSDT. All other table types are 206 * data tables that do not contain AML code. 207 * 208 ******************************************************************************/ 209 210 BOOLEAN 211 AcpiUtIsAmlTable ( 212 ACPI_TABLE_HEADER *Table) 213 { 214 215 /* These are the only tables that contain executable AML */ 216 217 if (ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT) || 218 ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_PSDT) || 219 ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT) || 220 ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_OSDT)) 221 { 222 return (TRUE); 223 } 224 225 return (FALSE); 226 } 227 #endif 228 229 230 /******************************************************************************* 231 * 232 * FUNCTION: AcpiUtDwordByteSwap 233 * 234 * PARAMETERS: Value - Value to be converted 235 * 236 * RETURN: UINT32 integer with bytes swapped 237 * 238 * DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes) 239 * 240 ******************************************************************************/ 241 242 UINT32 243 AcpiUtDwordByteSwap ( 244 UINT32 Value) 245 { 246 union 247 { 248 UINT32 Value; 249 UINT8 Bytes[4]; 250 } Out; 251 union 252 { 253 UINT32 Value; 254 UINT8 Bytes[4]; 255 } In; 256 257 258 ACPI_FUNCTION_ENTRY (); 259 260 261 In.Value = Value; 262 263 Out.Bytes[0] = In.Bytes[3]; 264 Out.Bytes[1] = In.Bytes[2]; 265 Out.Bytes[2] = In.Bytes[1]; 266 Out.Bytes[3] = In.Bytes[0]; 267 268 return (Out.Value); 269 } 270 271 272 /******************************************************************************* 273 * 274 * FUNCTION: AcpiUtSetIntegerWidth 275 * 276 * PARAMETERS: Revision From DSDT header 277 * 278 * RETURN: None 279 * 280 * DESCRIPTION: Set the global integer bit width based upon the revision 281 * of the DSDT. For Revision 1 and 0, Integers are 32 bits. 282 * For Revision 2 and above, Integers are 64 bits. Yes, this 283 * makes a difference. 284 * 285 ******************************************************************************/ 286 287 void 288 AcpiUtSetIntegerWidth ( 289 UINT8 Revision) 290 { 291 292 if (Revision < 2) 293 { 294 /* 32-bit case */ 295 296 AcpiGbl_IntegerBitWidth = 32; 297 AcpiGbl_IntegerNybbleWidth = 8; 298 AcpiGbl_IntegerByteWidth = 4; 299 } 300 else 301 { 302 /* 64-bit case (ACPI 2.0+) */ 303 304 AcpiGbl_IntegerBitWidth = 64; 305 AcpiGbl_IntegerNybbleWidth = 16; 306 AcpiGbl_IntegerByteWidth = 8; 307 } 308 } 309 310 311 /******************************************************************************* 312 * 313 * FUNCTION: AcpiUtCreateUpdateStateAndPush 314 * 315 * PARAMETERS: Object - Object to be added to the new state 316 * Action - Increment/Decrement 317 * StateList - List the state will be added to 318 * 319 * RETURN: Status 320 * 321 * DESCRIPTION: Create a new state and push it 322 * 323 ******************************************************************************/ 324 325 ACPI_STATUS 326 AcpiUtCreateUpdateStateAndPush ( 327 ACPI_OPERAND_OBJECT *Object, 328 UINT16 Action, 329 ACPI_GENERIC_STATE **StateList) 330 { 331 ACPI_GENERIC_STATE *State; 332 333 334 ACPI_FUNCTION_ENTRY (); 335 336 337 /* Ignore null objects; these are expected */ 338 339 if (!Object) 340 { 341 return (AE_OK); 342 } 343 344 State = AcpiUtCreateUpdateState (Object, Action); 345 if (!State) 346 { 347 return (AE_NO_MEMORY); 348 } 349 350 AcpiUtPushGenericState (StateList, State); 351 return (AE_OK); 352 } 353 354 355 /******************************************************************************* 356 * 357 * FUNCTION: AcpiUtWalkPackageTree 358 * 359 * PARAMETERS: SourceObject - The package to walk 360 * TargetObject - Target object (if package is being copied) 361 * WalkCallback - Called once for each package element 362 * Context - Passed to the callback function 363 * 364 * RETURN: Status 365 * 366 * DESCRIPTION: Walk through a package, including subpackages 367 * 368 ******************************************************************************/ 369 370 ACPI_STATUS 371 AcpiUtWalkPackageTree ( 372 ACPI_OPERAND_OBJECT *SourceObject, 373 void *TargetObject, 374 ACPI_PKG_CALLBACK WalkCallback, 375 void *Context) 376 { 377 ACPI_STATUS Status = AE_OK; 378 ACPI_GENERIC_STATE *StateList = NULL; 379 ACPI_GENERIC_STATE *State; 380 ACPI_OPERAND_OBJECT *ThisSourceObj; 381 UINT32 ThisIndex; 382 383 384 ACPI_FUNCTION_TRACE (UtWalkPackageTree); 385 386 387 State = AcpiUtCreatePkgState (SourceObject, TargetObject, 0); 388 if (!State) 389 { 390 return_ACPI_STATUS (AE_NO_MEMORY); 391 } 392 393 while (State) 394 { 395 /* Get one element of the package */ 396 397 ThisIndex = State->Pkg.Index; 398 ThisSourceObj = 399 State->Pkg.SourceObject->Package.Elements[ThisIndex]; 400 State->Pkg.ThisTargetObj = 401 &State->Pkg.SourceObject->Package.Elements[ThisIndex]; 402 403 /* 404 * Check for: 405 * 1) An uninitialized package element. It is completely 406 * legal to declare a package and leave it uninitialized 407 * 2) Not an internal object - can be a namespace node instead 408 * 3) Any type other than a package. Packages are handled in else 409 * case below. 410 */ 411 if ((!ThisSourceObj) || 412 (ACPI_GET_DESCRIPTOR_TYPE (ThisSourceObj) != 413 ACPI_DESC_TYPE_OPERAND) || 414 (ThisSourceObj->Common.Type != ACPI_TYPE_PACKAGE)) 415 { 416 Status = WalkCallback (ACPI_COPY_TYPE_SIMPLE, ThisSourceObj, 417 State, Context); 418 if (ACPI_FAILURE (Status)) 419 { 420 return_ACPI_STATUS (Status); 421 } 422 423 State->Pkg.Index++; 424 while (State->Pkg.Index >= 425 State->Pkg.SourceObject->Package.Count) 426 { 427 /* 428 * We've handled all of the objects at this level, This means 429 * that we have just completed a package. That package may 430 * have contained one or more packages itself. 431 * 432 * Delete this state and pop the previous state (package). 433 */ 434 AcpiUtDeleteGenericState (State); 435 State = AcpiUtPopGenericState (&StateList); 436 437 /* Finished when there are no more states */ 438 439 if (!State) 440 { 441 /* 442 * We have handled all of the objects in the top level 443 * package just add the length of the package objects 444 * and exit 445 */ 446 return_ACPI_STATUS (AE_OK); 447 } 448 449 /* 450 * Go back up a level and move the index past the just 451 * completed package object. 452 */ 453 State->Pkg.Index++; 454 } 455 } 456 else 457 { 458 /* This is a subobject of type package */ 459 460 Status = WalkCallback ( 461 ACPI_COPY_TYPE_PACKAGE, ThisSourceObj, State, Context); 462 if (ACPI_FAILURE (Status)) 463 { 464 return_ACPI_STATUS (Status); 465 } 466 467 /* 468 * Push the current state and create a new one 469 * The callback above returned a new target package object. 470 */ 471 AcpiUtPushGenericState (&StateList, State); 472 State = AcpiUtCreatePkgState ( 473 ThisSourceObj, State->Pkg.ThisTargetObj, 0); 474 if (!State) 475 { 476 /* Free any stacked Update State objects */ 477 478 while (StateList) 479 { 480 State = AcpiUtPopGenericState (&StateList); 481 AcpiUtDeleteGenericState (State); 482 } 483 return_ACPI_STATUS (AE_NO_MEMORY); 484 } 485 } 486 } 487 488 /* We should never get here */ 489 490 ACPI_ERROR ((AE_INFO, 491 "State list did not terminate correctly")); 492 493 return_ACPI_STATUS (AE_AML_INTERNAL); 494 } 495 496 497 #ifdef ACPI_DEBUG_OUTPUT 498 /******************************************************************************* 499 * 500 * FUNCTION: AcpiUtDisplayInitPathname 501 * 502 * PARAMETERS: Type - Object type of the node 503 * ObjHandle - Handle whose pathname will be displayed 504 * Path - Additional path string to be appended. 505 * (NULL if no extra path) 506 * 507 * RETURN: ACPI_STATUS 508 * 509 * DESCRIPTION: Display full pathname of an object, DEBUG ONLY 510 * 511 ******************************************************************************/ 512 513 void 514 AcpiUtDisplayInitPathname ( 515 UINT8 Type, 516 ACPI_NAMESPACE_NODE *ObjHandle, 517 const char *Path) 518 { 519 ACPI_STATUS Status; 520 ACPI_BUFFER Buffer; 521 522 523 ACPI_FUNCTION_ENTRY (); 524 525 526 /* Only print the path if the appropriate debug level is enabled */ 527 528 if (!(AcpiDbgLevel & ACPI_LV_INIT_NAMES)) 529 { 530 return; 531 } 532 533 /* Get the full pathname to the node */ 534 535 Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; 536 Status = AcpiNsHandleToPathname (ObjHandle, &Buffer, TRUE); 537 if (ACPI_FAILURE (Status)) 538 { 539 return; 540 } 541 542 /* Print what we're doing */ 543 544 switch (Type) 545 { 546 case ACPI_TYPE_METHOD: 547 548 AcpiOsPrintf ("Executing "); 549 break; 550 551 default: 552 553 AcpiOsPrintf ("Initializing "); 554 break; 555 } 556 557 /* Print the object type and pathname */ 558 559 AcpiOsPrintf ("%-12s %s", 560 AcpiUtGetTypeName (Type), (char *) Buffer.Pointer); 561 562 /* Extra path is used to append names like _STA, _INI, etc. */ 563 564 if (Path) 565 { 566 AcpiOsPrintf (".%s", Path); 567 } 568 AcpiOsPrintf ("\n"); 569 570 ACPI_FREE (Buffer.Pointer); 571 } 572 #endif 573