1 /****************************************************************************** 2 * 3 * Module Name: exutils - interpreter/scanner utilities 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2021, 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 /* 153 * DEFINE_AML_GLOBALS is tested in amlcode.h 154 * to determine whether certain global names should be "defined" or only 155 * "declared" in the current compilation. This enhances maintainability 156 * by enabling a single header file to embody all knowledge of the names 157 * in question. 158 * 159 * Exactly one module of any executable should #define DEFINE_GLOBALS 160 * before #including the header files which use this convention. The 161 * names in question will be defined and initialized in that module, 162 * and declared as extern in all other modules which #include those 163 * header files. 164 */ 165 166 #define DEFINE_AML_GLOBALS 167 168 #include "acpi.h" 169 #include "accommon.h" 170 #include "acinterp.h" 171 #include "amlcode.h" 172 173 #define _COMPONENT ACPI_EXECUTER 174 ACPI_MODULE_NAME ("exutils") 175 176 /* Local prototypes */ 177 178 static UINT32 179 AcpiExDigitsNeeded ( 180 UINT64 Value, 181 UINT32 Base); 182 183 184 /******************************************************************************* 185 * 186 * FUNCTION: AcpiExEnterInterpreter 187 * 188 * PARAMETERS: None 189 * 190 * RETURN: None 191 * 192 * DESCRIPTION: Enter the interpreter execution region. Failure to enter 193 * the interpreter region is a fatal system error. Used in 194 * conjunction with ExitInterpreter. 195 * 196 ******************************************************************************/ 197 198 void 199 AcpiExEnterInterpreter ( 200 void) 201 { 202 ACPI_STATUS Status; 203 204 205 ACPI_FUNCTION_TRACE (ExEnterInterpreter); 206 207 208 Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER); 209 if (ACPI_FAILURE (Status)) 210 { 211 ACPI_ERROR ((AE_INFO, "Could not acquire AML Interpreter mutex")); 212 } 213 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 214 if (ACPI_FAILURE (Status)) 215 { 216 ACPI_ERROR ((AE_INFO, "Could not acquire AML Namespace mutex")); 217 } 218 219 return_VOID; 220 } 221 222 223 /******************************************************************************* 224 * 225 * FUNCTION: AcpiExExitInterpreter 226 * 227 * PARAMETERS: None 228 * 229 * RETURN: None 230 * 231 * DESCRIPTION: Exit the interpreter execution region. This is the top level 232 * routine used to exit the interpreter when all processing has 233 * been completed, or when the method blocks. 234 * 235 * Cases where the interpreter is unlocked internally: 236 * 1) Method will be blocked on a Sleep() AML opcode 237 * 2) Method will be blocked on an Acquire() AML opcode 238 * 3) Method will be blocked on a Wait() AML opcode 239 * 4) Method will be blocked to acquire the global lock 240 * 5) Method will be blocked waiting to execute a serialized control 241 * method that is currently executing 242 * 6) About to invoke a user-installed opregion handler 243 * 244 ******************************************************************************/ 245 246 void 247 AcpiExExitInterpreter ( 248 void) 249 { 250 ACPI_STATUS Status; 251 252 253 ACPI_FUNCTION_TRACE (ExExitInterpreter); 254 255 256 Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 257 if (ACPI_FAILURE (Status)) 258 { 259 ACPI_ERROR ((AE_INFO, "Could not release AML Namespace mutex")); 260 } 261 Status = AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER); 262 if (ACPI_FAILURE (Status)) 263 { 264 ACPI_ERROR ((AE_INFO, "Could not release AML Interpreter mutex")); 265 } 266 267 return_VOID; 268 } 269 270 271 /******************************************************************************* 272 * 273 * FUNCTION: AcpiExTruncateFor32bitTable 274 * 275 * PARAMETERS: ObjDesc - Object to be truncated 276 * 277 * RETURN: TRUE if a truncation was performed, FALSE otherwise. 278 * 279 * DESCRIPTION: Truncate an ACPI Integer to 32 bits if the execution mode is 280 * 32-bit, as determined by the revision of the DSDT. 281 * 282 ******************************************************************************/ 283 284 BOOLEAN 285 AcpiExTruncateFor32bitTable ( 286 ACPI_OPERAND_OBJECT *ObjDesc) 287 { 288 289 ACPI_FUNCTION_ENTRY (); 290 291 292 /* 293 * Object must be a valid number and we must be executing 294 * a control method. Object could be NS node for AML_INT_NAMEPATH_OP. 295 */ 296 if ((!ObjDesc) || 297 (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) != ACPI_DESC_TYPE_OPERAND) || 298 (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)) 299 { 300 return (FALSE); 301 } 302 303 if ((AcpiGbl_IntegerByteWidth == 4) && 304 (ObjDesc->Integer.Value > (UINT64) ACPI_UINT32_MAX)) 305 { 306 /* 307 * We are executing in a 32-bit ACPI table. Truncate 308 * the value to 32 bits by zeroing out the upper 32-bit field 309 */ 310 ObjDesc->Integer.Value &= (UINT64) ACPI_UINT32_MAX; 311 return (TRUE); 312 } 313 314 return (FALSE); 315 } 316 317 318 /******************************************************************************* 319 * 320 * FUNCTION: AcpiExAcquireGlobalLock 321 * 322 * PARAMETERS: FieldFlags - Flags with Lock rule: 323 * AlwaysLock or NeverLock 324 * 325 * RETURN: None 326 * 327 * DESCRIPTION: Obtain the ACPI hardware Global Lock, only if the field 328 * flags specify that it is to be obtained before field access. 329 * 330 ******************************************************************************/ 331 332 void 333 AcpiExAcquireGlobalLock ( 334 UINT32 FieldFlags) 335 { 336 ACPI_STATUS Status; 337 338 339 ACPI_FUNCTION_TRACE (ExAcquireGlobalLock); 340 341 342 /* Only use the lock if the AlwaysLock bit is set */ 343 344 if (!(FieldFlags & AML_FIELD_LOCK_RULE_MASK)) 345 { 346 return_VOID; 347 } 348 349 /* Attempt to get the global lock, wait forever */ 350 351 Status = AcpiExAcquireMutexObject (ACPI_WAIT_FOREVER, 352 AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ()); 353 354 if (ACPI_FAILURE (Status)) 355 { 356 ACPI_EXCEPTION ((AE_INFO, Status, 357 "Could not acquire Global Lock")); 358 } 359 360 return_VOID; 361 } 362 363 364 /******************************************************************************* 365 * 366 * FUNCTION: AcpiExReleaseGlobalLock 367 * 368 * PARAMETERS: FieldFlags - Flags with Lock rule: 369 * AlwaysLock or NeverLock 370 * 371 * RETURN: None 372 * 373 * DESCRIPTION: Release the ACPI hardware Global Lock 374 * 375 ******************************************************************************/ 376 377 void 378 AcpiExReleaseGlobalLock ( 379 UINT32 FieldFlags) 380 { 381 ACPI_STATUS Status; 382 383 384 ACPI_FUNCTION_TRACE (ExReleaseGlobalLock); 385 386 387 /* Only use the lock if the AlwaysLock bit is set */ 388 389 if (!(FieldFlags & AML_FIELD_LOCK_RULE_MASK)) 390 { 391 return_VOID; 392 } 393 394 /* Release the global lock */ 395 396 Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex); 397 if (ACPI_FAILURE (Status)) 398 { 399 /* Report the error, but there isn't much else we can do */ 400 401 ACPI_EXCEPTION ((AE_INFO, Status, 402 "Could not release Global Lock")); 403 } 404 405 return_VOID; 406 } 407 408 409 /******************************************************************************* 410 * 411 * FUNCTION: AcpiExDigitsNeeded 412 * 413 * PARAMETERS: Value - Value to be represented 414 * Base - Base of representation 415 * 416 * RETURN: The number of digits. 417 * 418 * DESCRIPTION: Calculate the number of digits needed to represent the Value 419 * in the given Base (Radix) 420 * 421 ******************************************************************************/ 422 423 static UINT32 424 AcpiExDigitsNeeded ( 425 UINT64 Value, 426 UINT32 Base) 427 { 428 UINT32 NumDigits; 429 UINT64 CurrentValue; 430 431 432 ACPI_FUNCTION_TRACE (ExDigitsNeeded); 433 434 435 /* UINT64 is unsigned, so we don't worry about a '-' prefix */ 436 437 if (Value == 0) 438 { 439 return_UINT32 (1); 440 } 441 442 CurrentValue = Value; 443 NumDigits = 0; 444 445 /* Count the digits in the requested base */ 446 447 while (CurrentValue) 448 { 449 (void) AcpiUtShortDivide (CurrentValue, Base, &CurrentValue, NULL); 450 NumDigits++; 451 } 452 453 return_UINT32 (NumDigits); 454 } 455 456 457 /******************************************************************************* 458 * 459 * FUNCTION: AcpiExEisaIdToString 460 * 461 * PARAMETERS: OutString - Where to put the converted string (8 bytes) 462 * CompressedId - EISAID to be converted 463 * 464 * RETURN: None 465 * 466 * DESCRIPTION: Convert a numeric EISAID to string representation. Return 467 * buffer must be large enough to hold the string. The string 468 * returned is always exactly of length ACPI_EISAID_STRING_SIZE 469 * (includes null terminator). The EISAID is always 32 bits. 470 * 471 ******************************************************************************/ 472 473 void 474 AcpiExEisaIdToString ( 475 char *OutString, 476 UINT64 CompressedId) 477 { 478 UINT32 SwappedId; 479 480 481 ACPI_FUNCTION_ENTRY (); 482 483 484 /* The EISAID should be a 32-bit integer */ 485 486 if (CompressedId > ACPI_UINT32_MAX) 487 { 488 ACPI_WARNING ((AE_INFO, 489 "Expected EISAID is larger than 32 bits: " 490 "0x%8.8X%8.8X, truncating", 491 ACPI_FORMAT_UINT64 (CompressedId))); 492 } 493 494 /* Swap ID to big-endian to get contiguous bits */ 495 496 SwappedId = AcpiUtDwordByteSwap ((UINT32) CompressedId); 497 498 /* First 3 bytes are uppercase letters. Next 4 bytes are hexadecimal */ 499 500 OutString[0] = (char) (0x40 + (((unsigned long) SwappedId >> 26) & 0x1F)); 501 OutString[1] = (char) (0x40 + ((SwappedId >> 21) & 0x1F)); 502 OutString[2] = (char) (0x40 + ((SwappedId >> 16) & 0x1F)); 503 OutString[3] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 12); 504 OutString[4] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 8); 505 OutString[5] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 4); 506 OutString[6] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 0); 507 OutString[7] = 0; 508 } 509 510 511 /******************************************************************************* 512 * 513 * FUNCTION: AcpiExIntegerToString 514 * 515 * PARAMETERS: OutString - Where to put the converted string. At least 516 * 21 bytes are needed to hold the largest 517 * possible 64-bit integer. 518 * Value - Value to be converted 519 * 520 * RETURN: Converted string in OutString 521 * 522 * DESCRIPTION: Convert a 64-bit integer to decimal string representation. 523 * Assumes string buffer is large enough to hold the string. The 524 * largest string is (ACPI_MAX64_DECIMAL_DIGITS + 1). 525 * 526 ******************************************************************************/ 527 528 void 529 AcpiExIntegerToString ( 530 char *OutString, 531 UINT64 Value) 532 { 533 UINT32 Count; 534 UINT32 DigitsNeeded; 535 UINT32 Remainder; 536 537 538 ACPI_FUNCTION_ENTRY (); 539 540 541 DigitsNeeded = AcpiExDigitsNeeded (Value, 10); 542 OutString[DigitsNeeded] = 0; 543 544 for (Count = DigitsNeeded; Count > 0; Count--) 545 { 546 (void) AcpiUtShortDivide (Value, 10, &Value, &Remainder); 547 OutString[Count-1] = (char) ('0' + Remainder);\ 548 } 549 } 550 551 552 /******************************************************************************* 553 * 554 * FUNCTION: AcpiExPciClsToString 555 * 556 * PARAMETERS: OutString - Where to put the converted string (7 bytes) 557 * ClassCode - PCI class code to be converted (3 bytes) 558 * 559 * RETURN: Converted string in OutString 560 * 561 * DESCRIPTION: Convert 3-bytes PCI class code to string representation. 562 * Return buffer must be large enough to hold the string. The 563 * string returned is always exactly of length 564 * ACPI_PCICLS_STRING_SIZE (includes null terminator). 565 * 566 ******************************************************************************/ 567 568 void 569 AcpiExPciClsToString ( 570 char *OutString, 571 UINT8 ClassCode[3]) 572 { 573 574 ACPI_FUNCTION_ENTRY (); 575 576 577 /* All 3 bytes are hexadecimal */ 578 579 OutString[0] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[0], 4); 580 OutString[1] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[0], 0); 581 OutString[2] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[1], 4); 582 OutString[3] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[1], 0); 583 OutString[4] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[2], 4); 584 OutString[5] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[2], 0); 585 OutString[6] = 0; 586 } 587 588 589 /******************************************************************************* 590 * 591 * FUNCTION: AcpiIsValidSpaceId 592 * 593 * PARAMETERS: SpaceId - ID to be validated 594 * 595 * RETURN: TRUE if SpaceId is a valid/supported ID. 596 * 597 * DESCRIPTION: Validate an operation region SpaceID. 598 * 599 ******************************************************************************/ 600 601 BOOLEAN 602 AcpiIsValidSpaceId ( 603 UINT8 SpaceId) 604 { 605 606 if ((SpaceId >= ACPI_NUM_PREDEFINED_REGIONS) && 607 (SpaceId < ACPI_USER_REGION_BEGIN) && 608 (SpaceId != ACPI_ADR_SPACE_DATA_TABLE) && 609 (SpaceId != ACPI_ADR_SPACE_FIXED_HARDWARE)) 610 { 611 return (FALSE); 612 } 613 614 return (TRUE); 615 } 616