1 /****************************************************************************** 2 * 3 * Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2020, 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 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/acinterp.h> 156 #include <contrib/dev/acpica/include/amlcode.h> 157 158 159 #define _COMPONENT ACPI_EXECUTER 160 ACPI_MODULE_NAME ("exmisc") 161 162 163 /******************************************************************************* 164 * 165 * FUNCTION: AcpiExGetObjectReference 166 * 167 * PARAMETERS: ObjDesc - Create a reference to this object 168 * ReturnDesc - Where to store the reference 169 * WalkState - Current state 170 * 171 * RETURN: Status 172 * 173 * DESCRIPTION: Obtain and return a "reference" to the target object 174 * Common code for the RefOfOp and the CondRefOfOp. 175 * 176 ******************************************************************************/ 177 178 ACPI_STATUS 179 AcpiExGetObjectReference ( 180 ACPI_OPERAND_OBJECT *ObjDesc, 181 ACPI_OPERAND_OBJECT **ReturnDesc, 182 ACPI_WALK_STATE *WalkState) 183 { 184 ACPI_OPERAND_OBJECT *ReferenceObj; 185 ACPI_OPERAND_OBJECT *ReferencedObj; 186 187 188 ACPI_FUNCTION_TRACE_PTR (ExGetObjectReference, ObjDesc); 189 190 191 *ReturnDesc = NULL; 192 193 switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc)) 194 { 195 case ACPI_DESC_TYPE_OPERAND: 196 197 if (ObjDesc->Common.Type != ACPI_TYPE_LOCAL_REFERENCE) 198 { 199 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 200 } 201 202 /* 203 * Must be a reference to a Local or Arg 204 */ 205 switch (ObjDesc->Reference.Class) 206 { 207 case ACPI_REFCLASS_LOCAL: 208 case ACPI_REFCLASS_ARG: 209 case ACPI_REFCLASS_DEBUG: 210 211 /* The referenced object is the pseudo-node for the local/arg */ 212 213 ReferencedObj = ObjDesc->Reference.Object; 214 break; 215 216 default: 217 218 ACPI_ERROR ((AE_INFO, "Invalid Reference Class 0x%2.2X", 219 ObjDesc->Reference.Class)); 220 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 221 } 222 break; 223 224 case ACPI_DESC_TYPE_NAMED: 225 /* 226 * A named reference that has already been resolved to a Node 227 */ 228 ReferencedObj = ObjDesc; 229 break; 230 231 default: 232 233 ACPI_ERROR ((AE_INFO, "Invalid descriptor type 0x%X", 234 ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))); 235 return_ACPI_STATUS (AE_TYPE); 236 } 237 238 239 /* Create a new reference object */ 240 241 ReferenceObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE); 242 if (!ReferenceObj) 243 { 244 return_ACPI_STATUS (AE_NO_MEMORY); 245 } 246 247 ReferenceObj->Reference.Class = ACPI_REFCLASS_REFOF; 248 ReferenceObj->Reference.Object = ReferencedObj; 249 *ReturnDesc = ReferenceObj; 250 251 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 252 "Object %p Type [%s], returning Reference %p\n", 253 ObjDesc, AcpiUtGetObjectTypeName (ObjDesc), *ReturnDesc)); 254 255 return_ACPI_STATUS (AE_OK); 256 } 257 258 259 /******************************************************************************* 260 * 261 * FUNCTION: AcpiExDoMathOp 262 * 263 * PARAMETERS: Opcode - AML opcode 264 * Integer0 - Integer operand #0 265 * Integer1 - Integer operand #1 266 * 267 * RETURN: Integer result of the operation 268 * 269 * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the 270 * math functions here is to prevent a lot of pointer dereferencing 271 * to obtain the operands. 272 * 273 ******************************************************************************/ 274 275 UINT64 276 AcpiExDoMathOp ( 277 UINT16 Opcode, 278 UINT64 Integer0, 279 UINT64 Integer1) 280 { 281 282 ACPI_FUNCTION_ENTRY (); 283 284 285 switch (Opcode) 286 { 287 case AML_ADD_OP: /* Add (Integer0, Integer1, Result) */ 288 289 return (Integer0 + Integer1); 290 291 case AML_BIT_AND_OP: /* And (Integer0, Integer1, Result) */ 292 293 return (Integer0 & Integer1); 294 295 case AML_BIT_NAND_OP: /* NAnd (Integer0, Integer1, Result) */ 296 297 return (~(Integer0 & Integer1)); 298 299 case AML_BIT_OR_OP: /* Or (Integer0, Integer1, Result) */ 300 301 return (Integer0 | Integer1); 302 303 case AML_BIT_NOR_OP: /* NOr (Integer0, Integer1, Result) */ 304 305 return (~(Integer0 | Integer1)); 306 307 case AML_BIT_XOR_OP: /* XOr (Integer0, Integer1, Result) */ 308 309 return (Integer0 ^ Integer1); 310 311 case AML_MULTIPLY_OP: /* Multiply (Integer0, Integer1, Result) */ 312 313 return (Integer0 * Integer1); 314 315 case AML_SHIFT_LEFT_OP: /* ShiftLeft (Operand, ShiftCount, Result)*/ 316 317 /* 318 * We need to check if the shiftcount is larger than the integer bit 319 * width since the behavior of this is not well-defined in the C language. 320 */ 321 if (Integer1 >= AcpiGbl_IntegerBitWidth) 322 { 323 return (0); 324 } 325 return (Integer0 << Integer1); 326 327 case AML_SHIFT_RIGHT_OP: /* ShiftRight (Operand, ShiftCount, Result) */ 328 329 /* 330 * We need to check if the shiftcount is larger than the integer bit 331 * width since the behavior of this is not well-defined in the C language. 332 */ 333 if (Integer1 >= AcpiGbl_IntegerBitWidth) 334 { 335 return (0); 336 } 337 return (Integer0 >> Integer1); 338 339 case AML_SUBTRACT_OP: /* Subtract (Integer0, Integer1, Result) */ 340 341 return (Integer0 - Integer1); 342 343 default: 344 345 return (0); 346 } 347 } 348 349 350 /******************************************************************************* 351 * 352 * FUNCTION: AcpiExDoLogicalNumericOp 353 * 354 * PARAMETERS: Opcode - AML opcode 355 * Integer0 - Integer operand #0 356 * Integer1 - Integer operand #1 357 * LogicalResult - TRUE/FALSE result of the operation 358 * 359 * RETURN: Status 360 * 361 * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric 362 * operators (LAnd and LOr), both operands must be integers. 363 * 364 * Note: cleanest machine code seems to be produced by the code 365 * below, rather than using statements of the form: 366 * Result = (Integer0 && Integer1); 367 * 368 ******************************************************************************/ 369 370 ACPI_STATUS 371 AcpiExDoLogicalNumericOp ( 372 UINT16 Opcode, 373 UINT64 Integer0, 374 UINT64 Integer1, 375 BOOLEAN *LogicalResult) 376 { 377 ACPI_STATUS Status = AE_OK; 378 BOOLEAN LocalResult = FALSE; 379 380 381 ACPI_FUNCTION_TRACE (ExDoLogicalNumericOp); 382 383 384 switch (Opcode) 385 { 386 case AML_LOGICAL_AND_OP: /* LAnd (Integer0, Integer1) */ 387 388 if (Integer0 && Integer1) 389 { 390 LocalResult = TRUE; 391 } 392 break; 393 394 case AML_LOGICAL_OR_OP: /* LOr (Integer0, Integer1) */ 395 396 if (Integer0 || Integer1) 397 { 398 LocalResult = TRUE; 399 } 400 break; 401 402 default: 403 404 ACPI_ERROR ((AE_INFO, 405 "Invalid numeric logical opcode: %X", Opcode)); 406 Status = AE_AML_INTERNAL; 407 break; 408 } 409 410 /* Return the logical result and status */ 411 412 *LogicalResult = LocalResult; 413 return_ACPI_STATUS (Status); 414 } 415 416 417 /******************************************************************************* 418 * 419 * FUNCTION: AcpiExDoLogicalOp 420 * 421 * PARAMETERS: Opcode - AML opcode 422 * Operand0 - operand #0 423 * Operand1 - operand #1 424 * LogicalResult - TRUE/FALSE result of the operation 425 * 426 * RETURN: Status 427 * 428 * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the 429 * functions here is to prevent a lot of pointer dereferencing 430 * to obtain the operands and to simplify the generation of the 431 * logical value. For the Numeric operators (LAnd and LOr), both 432 * operands must be integers. For the other logical operators, 433 * operands can be any combination of Integer/String/Buffer. The 434 * first operand determines the type to which the second operand 435 * will be converted. 436 * 437 * Note: cleanest machine code seems to be produced by the code 438 * below, rather than using statements of the form: 439 * Result = (Operand0 == Operand1); 440 * 441 ******************************************************************************/ 442 443 ACPI_STATUS 444 AcpiExDoLogicalOp ( 445 UINT16 Opcode, 446 ACPI_OPERAND_OBJECT *Operand0, 447 ACPI_OPERAND_OBJECT *Operand1, 448 BOOLEAN *LogicalResult) 449 { 450 ACPI_OPERAND_OBJECT *LocalOperand1 = Operand1; 451 UINT64 Integer0; 452 UINT64 Integer1; 453 UINT32 Length0; 454 UINT32 Length1; 455 ACPI_STATUS Status = AE_OK; 456 BOOLEAN LocalResult = FALSE; 457 int Compare; 458 459 460 ACPI_FUNCTION_TRACE (ExDoLogicalOp); 461 462 463 /* 464 * Convert the second operand if necessary. The first operand 465 * determines the type of the second operand, (See the Data Types 466 * section of the ACPI 3.0+ specification.) Both object types are 467 * guaranteed to be either Integer/String/Buffer by the operand 468 * resolution mechanism. 469 */ 470 switch (Operand0->Common.Type) 471 { 472 case ACPI_TYPE_INTEGER: 473 474 Status = AcpiExConvertToInteger (Operand1, &LocalOperand1, 475 ACPI_IMPLICIT_CONVERSION); 476 break; 477 478 case ACPI_TYPE_STRING: 479 480 Status = AcpiExConvertToString ( 481 Operand1, &LocalOperand1, ACPI_IMPLICIT_CONVERT_HEX); 482 break; 483 484 case ACPI_TYPE_BUFFER: 485 486 Status = AcpiExConvertToBuffer (Operand1, &LocalOperand1); 487 break; 488 489 default: 490 491 ACPI_ERROR ((AE_INFO, 492 "Invalid object type for logical operator: %X", 493 Operand0->Common.Type)); 494 Status = AE_AML_INTERNAL; 495 break; 496 } 497 498 if (ACPI_FAILURE (Status)) 499 { 500 goto Cleanup; 501 } 502 503 /* 504 * Two cases: 1) Both Integers, 2) Both Strings or Buffers 505 */ 506 if (Operand0->Common.Type == ACPI_TYPE_INTEGER) 507 { 508 /* 509 * 1) Both operands are of type integer 510 * Note: LocalOperand1 may have changed above 511 */ 512 Integer0 = Operand0->Integer.Value; 513 Integer1 = LocalOperand1->Integer.Value; 514 515 switch (Opcode) 516 { 517 case AML_LOGICAL_EQUAL_OP: /* LEqual (Operand0, Operand1) */ 518 519 if (Integer0 == Integer1) 520 { 521 LocalResult = TRUE; 522 } 523 break; 524 525 case AML_LOGICAL_GREATER_OP: /* LGreater (Operand0, Operand1) */ 526 527 if (Integer0 > Integer1) 528 { 529 LocalResult = TRUE; 530 } 531 break; 532 533 case AML_LOGICAL_LESS_OP: /* LLess (Operand0, Operand1) */ 534 535 if (Integer0 < Integer1) 536 { 537 LocalResult = TRUE; 538 } 539 break; 540 541 default: 542 543 ACPI_ERROR ((AE_INFO, 544 "Invalid comparison opcode: %X", Opcode)); 545 Status = AE_AML_INTERNAL; 546 break; 547 } 548 } 549 else 550 { 551 /* 552 * 2) Both operands are Strings or both are Buffers 553 * Note: Code below takes advantage of common Buffer/String 554 * object fields. LocalOperand1 may have changed above. Use 555 * memcmp to handle nulls in buffers. 556 */ 557 Length0 = Operand0->Buffer.Length; 558 Length1 = LocalOperand1->Buffer.Length; 559 560 /* Lexicographic compare: compare the data bytes */ 561 562 Compare = memcmp (Operand0->Buffer.Pointer, 563 LocalOperand1->Buffer.Pointer, 564 (Length0 > Length1) ? Length1 : Length0); 565 566 switch (Opcode) 567 { 568 case AML_LOGICAL_EQUAL_OP: /* LEqual (Operand0, Operand1) */ 569 570 /* Length and all bytes must be equal */ 571 572 if ((Length0 == Length1) && 573 (Compare == 0)) 574 { 575 /* Length and all bytes match ==> TRUE */ 576 577 LocalResult = TRUE; 578 } 579 break; 580 581 case AML_LOGICAL_GREATER_OP: /* LGreater (Operand0, Operand1) */ 582 583 if (Compare > 0) 584 { 585 LocalResult = TRUE; 586 goto Cleanup; /* TRUE */ 587 } 588 if (Compare < 0) 589 { 590 goto Cleanup; /* FALSE */ 591 } 592 593 /* Bytes match (to shortest length), compare lengths */ 594 595 if (Length0 > Length1) 596 { 597 LocalResult = TRUE; 598 } 599 break; 600 601 case AML_LOGICAL_LESS_OP: /* LLess (Operand0, Operand1) */ 602 603 if (Compare > 0) 604 { 605 goto Cleanup; /* FALSE */ 606 } 607 if (Compare < 0) 608 { 609 LocalResult = TRUE; 610 goto Cleanup; /* TRUE */ 611 } 612 613 /* Bytes match (to shortest length), compare lengths */ 614 615 if (Length0 < Length1) 616 { 617 LocalResult = TRUE; 618 } 619 break; 620 621 default: 622 623 ACPI_ERROR ((AE_INFO, 624 "Invalid comparison opcode: %X", Opcode)); 625 Status = AE_AML_INTERNAL; 626 break; 627 } 628 } 629 630 Cleanup: 631 632 /* New object was created if implicit conversion performed - delete */ 633 634 if (LocalOperand1 != Operand1) 635 { 636 AcpiUtRemoveReference (LocalOperand1); 637 } 638 639 /* Return the logical result and status */ 640 641 *LogicalResult = LocalResult; 642 return_ACPI_STATUS (Status); 643 } 644