1 /****************************************************************************** 2 * 3 * Module Name: exconvrt - Object conversion routines 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2016, 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 #include "acpi.h" 117 #include "accommon.h" 118 #include "acinterp.h" 119 #include "amlcode.h" 120 121 122 #define _COMPONENT ACPI_EXECUTER 123 ACPI_MODULE_NAME ("exconvrt") 124 125 /* Local prototypes */ 126 127 static UINT32 128 AcpiExConvertToAscii ( 129 UINT64 Integer, 130 UINT16 Base, 131 UINT8 *String, 132 UINT8 MaxLength); 133 134 135 /******************************************************************************* 136 * 137 * FUNCTION: AcpiExConvertToInteger 138 * 139 * PARAMETERS: ObjDesc - Object to be converted. Must be an 140 * Integer, Buffer, or String 141 * ResultDesc - Where the new Integer object is returned 142 * Flags - Used for string conversion 143 * 144 * RETURN: Status 145 * 146 * DESCRIPTION: Convert an ACPI Object to an integer. 147 * 148 ******************************************************************************/ 149 150 ACPI_STATUS 151 AcpiExConvertToInteger ( 152 ACPI_OPERAND_OBJECT *ObjDesc, 153 ACPI_OPERAND_OBJECT **ResultDesc, 154 UINT32 Flags) 155 { 156 ACPI_OPERAND_OBJECT *ReturnDesc; 157 UINT8 *Pointer; 158 UINT64 Result; 159 UINT32 i; 160 UINT32 Count; 161 ACPI_STATUS Status; 162 163 164 ACPI_FUNCTION_TRACE_PTR (ExConvertToInteger, ObjDesc); 165 166 167 switch (ObjDesc->Common.Type) 168 { 169 case ACPI_TYPE_INTEGER: 170 171 /* No conversion necessary */ 172 173 *ResultDesc = ObjDesc; 174 return_ACPI_STATUS (AE_OK); 175 176 case ACPI_TYPE_BUFFER: 177 case ACPI_TYPE_STRING: 178 179 /* Note: Takes advantage of common buffer/string fields */ 180 181 Pointer = ObjDesc->Buffer.Pointer; 182 Count = ObjDesc->Buffer.Length; 183 break; 184 185 default: 186 187 return_ACPI_STATUS (AE_TYPE); 188 } 189 190 /* 191 * Convert the buffer/string to an integer. Note that both buffers and 192 * strings are treated as raw data - we don't convert ascii to hex for 193 * strings. 194 * 195 * There are two terminating conditions for the loop: 196 * 1) The size of an integer has been reached, or 197 * 2) The end of the buffer or string has been reached 198 */ 199 Result = 0; 200 201 /* String conversion is different than Buffer conversion */ 202 203 switch (ObjDesc->Common.Type) 204 { 205 case ACPI_TYPE_STRING: 206 /* 207 * Convert string to an integer - for most cases, the string must be 208 * hexadecimal as per the ACPI specification. The only exception (as 209 * of ACPI 3.0) is that the ToInteger() operator allows both decimal 210 * and hexadecimal strings (hex prefixed with "0x"). 211 */ 212 Status = AcpiUtStrtoul64 ((char *) Pointer, Flags, 213 AcpiGbl_IntegerByteWidth, &Result); 214 if (ACPI_FAILURE (Status)) 215 { 216 return_ACPI_STATUS (Status); 217 } 218 break; 219 220 case ACPI_TYPE_BUFFER: 221 222 /* Check for zero-length buffer */ 223 224 if (!Count) 225 { 226 return_ACPI_STATUS (AE_AML_BUFFER_LIMIT); 227 } 228 229 /* Transfer no more than an integer's worth of data */ 230 231 if (Count > AcpiGbl_IntegerByteWidth) 232 { 233 Count = AcpiGbl_IntegerByteWidth; 234 } 235 236 /* 237 * Convert buffer to an integer - we simply grab enough raw data 238 * from the buffer to fill an integer 239 */ 240 for (i = 0; i < Count; i++) 241 { 242 /* 243 * Get next byte and shift it into the Result. 244 * Little endian is used, meaning that the first byte of the buffer 245 * is the LSB of the integer 246 */ 247 Result |= (((UINT64) Pointer[i]) << (i * 8)); 248 } 249 break; 250 251 default: 252 253 /* No other types can get here */ 254 255 break; 256 } 257 258 /* Create a new integer */ 259 260 ReturnDesc = AcpiUtCreateIntegerObject (Result); 261 if (!ReturnDesc) 262 { 263 return_ACPI_STATUS (AE_NO_MEMORY); 264 } 265 266 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n", 267 ACPI_FORMAT_UINT64 (Result))); 268 269 /* Save the Result */ 270 271 (void) AcpiExTruncateFor32bitTable (ReturnDesc); 272 *ResultDesc = ReturnDesc; 273 return_ACPI_STATUS (AE_OK); 274 } 275 276 277 /******************************************************************************* 278 * 279 * FUNCTION: AcpiExConvertToBuffer 280 * 281 * PARAMETERS: ObjDesc - Object to be converted. Must be an 282 * Integer, Buffer, or String 283 * ResultDesc - Where the new buffer object is returned 284 * 285 * RETURN: Status 286 * 287 * DESCRIPTION: Convert an ACPI Object to a Buffer 288 * 289 ******************************************************************************/ 290 291 ACPI_STATUS 292 AcpiExConvertToBuffer ( 293 ACPI_OPERAND_OBJECT *ObjDesc, 294 ACPI_OPERAND_OBJECT **ResultDesc) 295 { 296 ACPI_OPERAND_OBJECT *ReturnDesc; 297 UINT8 *NewBuf; 298 299 300 ACPI_FUNCTION_TRACE_PTR (ExConvertToBuffer, ObjDesc); 301 302 303 switch (ObjDesc->Common.Type) 304 { 305 case ACPI_TYPE_BUFFER: 306 307 /* No conversion necessary */ 308 309 *ResultDesc = ObjDesc; 310 return_ACPI_STATUS (AE_OK); 311 312 313 case ACPI_TYPE_INTEGER: 314 /* 315 * Create a new Buffer object. 316 * Need enough space for one integer 317 */ 318 ReturnDesc = AcpiUtCreateBufferObject (AcpiGbl_IntegerByteWidth); 319 if (!ReturnDesc) 320 { 321 return_ACPI_STATUS (AE_NO_MEMORY); 322 } 323 324 /* Copy the integer to the buffer, LSB first */ 325 326 NewBuf = ReturnDesc->Buffer.Pointer; 327 memcpy (NewBuf, &ObjDesc->Integer.Value, AcpiGbl_IntegerByteWidth); 328 break; 329 330 case ACPI_TYPE_STRING: 331 /* 332 * Create a new Buffer object 333 * Size will be the string length 334 * 335 * NOTE: Add one to the string length to include the null terminator. 336 * The ACPI spec is unclear on this subject, but there is existing 337 * ASL/AML code that depends on the null being transferred to the new 338 * buffer. 339 */ 340 ReturnDesc = AcpiUtCreateBufferObject ((ACPI_SIZE) 341 ObjDesc->String.Length + 1); 342 if (!ReturnDesc) 343 { 344 return_ACPI_STATUS (AE_NO_MEMORY); 345 } 346 347 /* Copy the string to the buffer */ 348 349 NewBuf = ReturnDesc->Buffer.Pointer; 350 strncpy ((char *) NewBuf, (char *) ObjDesc->String.Pointer, 351 ObjDesc->String.Length); 352 break; 353 354 default: 355 356 return_ACPI_STATUS (AE_TYPE); 357 } 358 359 /* Mark buffer initialized */ 360 361 ReturnDesc->Common.Flags |= AOPOBJ_DATA_VALID; 362 *ResultDesc = ReturnDesc; 363 return_ACPI_STATUS (AE_OK); 364 } 365 366 367 /******************************************************************************* 368 * 369 * FUNCTION: AcpiExConvertToAscii 370 * 371 * PARAMETERS: Integer - Value to be converted 372 * Base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX 373 * String - Where the string is returned 374 * DataWidth - Size of data item to be converted, in bytes 375 * 376 * RETURN: Actual string length 377 * 378 * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string 379 * 380 ******************************************************************************/ 381 382 static UINT32 383 AcpiExConvertToAscii ( 384 UINT64 Integer, 385 UINT16 Base, 386 UINT8 *String, 387 UINT8 DataWidth) 388 { 389 UINT64 Digit; 390 UINT32 i; 391 UINT32 j; 392 UINT32 k = 0; 393 UINT32 HexLength; 394 UINT32 DecimalLength; 395 UINT32 Remainder; 396 BOOLEAN SupressZeros; 397 398 399 ACPI_FUNCTION_ENTRY (); 400 401 402 switch (Base) 403 { 404 case 10: 405 406 /* Setup max length for the decimal number */ 407 408 switch (DataWidth) 409 { 410 case 1: 411 412 DecimalLength = ACPI_MAX8_DECIMAL_DIGITS; 413 break; 414 415 case 4: 416 417 DecimalLength = ACPI_MAX32_DECIMAL_DIGITS; 418 break; 419 420 case 8: 421 default: 422 423 DecimalLength = ACPI_MAX64_DECIMAL_DIGITS; 424 break; 425 } 426 427 SupressZeros = TRUE; /* No leading zeros */ 428 Remainder = 0; 429 430 for (i = DecimalLength; i > 0; i--) 431 { 432 /* Divide by nth factor of 10 */ 433 434 Digit = Integer; 435 for (j = 0; j < i; j++) 436 { 437 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Remainder); 438 } 439 440 /* Handle leading zeros */ 441 442 if (Remainder != 0) 443 { 444 SupressZeros = FALSE; 445 } 446 447 if (!SupressZeros) 448 { 449 String[k] = (UINT8) (ACPI_ASCII_ZERO + Remainder); 450 k++; 451 } 452 } 453 break; 454 455 case 16: 456 457 /* HexLength: 2 ascii hex chars per data byte */ 458 459 HexLength = ACPI_MUL_2 (DataWidth); 460 for (i = 0, j = (HexLength-1); i < HexLength; i++, j--) 461 { 462 /* Get one hex digit, most significant digits first */ 463 464 String[k] = (UINT8) 465 AcpiUtHexToAsciiChar (Integer, ACPI_MUL_4 (j)); 466 k++; 467 } 468 break; 469 470 default: 471 return (0); 472 } 473 474 /* 475 * Since leading zeros are suppressed, we must check for the case where 476 * the integer equals 0 477 * 478 * Finally, null terminate the string and return the length 479 */ 480 if (!k) 481 { 482 String [0] = ACPI_ASCII_ZERO; 483 k = 1; 484 } 485 486 String [k] = 0; 487 return ((UINT32) k); 488 } 489 490 491 /******************************************************************************* 492 * 493 * FUNCTION: AcpiExConvertToString 494 * 495 * PARAMETERS: ObjDesc - Object to be converted. Must be an 496 * Integer, Buffer, or String 497 * ResultDesc - Where the string object is returned 498 * Type - String flags (base and conversion type) 499 * 500 * RETURN: Status 501 * 502 * DESCRIPTION: Convert an ACPI Object to a string 503 * 504 ******************************************************************************/ 505 506 ACPI_STATUS 507 AcpiExConvertToString ( 508 ACPI_OPERAND_OBJECT *ObjDesc, 509 ACPI_OPERAND_OBJECT **ResultDesc, 510 UINT32 Type) 511 { 512 ACPI_OPERAND_OBJECT *ReturnDesc; 513 UINT8 *NewBuf; 514 UINT32 i; 515 UINT32 StringLength = 0; 516 UINT16 Base = 16; 517 UINT8 Separator = ','; 518 519 520 ACPI_FUNCTION_TRACE_PTR (ExConvertToString, ObjDesc); 521 522 523 switch (ObjDesc->Common.Type) 524 { 525 case ACPI_TYPE_STRING: 526 527 /* No conversion necessary */ 528 529 *ResultDesc = ObjDesc; 530 return_ACPI_STATUS (AE_OK); 531 532 case ACPI_TYPE_INTEGER: 533 534 switch (Type) 535 { 536 case ACPI_EXPLICIT_CONVERT_DECIMAL: 537 538 /* Make room for maximum decimal number */ 539 540 StringLength = ACPI_MAX_DECIMAL_DIGITS; 541 Base = 10; 542 break; 543 544 default: 545 546 /* Two hex string characters for each integer byte */ 547 548 StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth); 549 break; 550 } 551 552 /* 553 * Create a new String 554 * Need enough space for one ASCII integer (plus null terminator) 555 */ 556 ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength); 557 if (!ReturnDesc) 558 { 559 return_ACPI_STATUS (AE_NO_MEMORY); 560 } 561 562 NewBuf = ReturnDesc->Buffer.Pointer; 563 564 /* Convert integer to string */ 565 566 StringLength = AcpiExConvertToAscii ( 567 ObjDesc->Integer.Value, Base, NewBuf, AcpiGbl_IntegerByteWidth); 568 569 /* Null terminate at the correct place */ 570 571 ReturnDesc->String.Length = StringLength; 572 NewBuf [StringLength] = 0; 573 break; 574 575 case ACPI_TYPE_BUFFER: 576 577 /* Setup string length, base, and separator */ 578 579 switch (Type) 580 { 581 case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by ToDecimalString */ 582 /* 583 * From ACPI: "If Data is a buffer, it is converted to a string of 584 * decimal values separated by commas." 585 */ 586 Base = 10; 587 588 /* 589 * Calculate the final string length. Individual string values 590 * are variable length (include separator for each) 591 */ 592 for (i = 0; i < ObjDesc->Buffer.Length; i++) 593 { 594 if (ObjDesc->Buffer.Pointer[i] >= 100) 595 { 596 StringLength += 4; 597 } 598 else if (ObjDesc->Buffer.Pointer[i] >= 10) 599 { 600 StringLength += 3; 601 } 602 else 603 { 604 StringLength += 2; 605 } 606 } 607 break; 608 609 case ACPI_IMPLICIT_CONVERT_HEX: 610 /* 611 * From the ACPI spec: 612 *"The entire contents of the buffer are converted to a string of 613 * two-character hexadecimal numbers, each separated by a space." 614 */ 615 Separator = ' '; 616 StringLength = (ObjDesc->Buffer.Length * 3); 617 break; 618 619 case ACPI_EXPLICIT_CONVERT_HEX: /* Used by ToHexString */ 620 /* 621 * From ACPI: "If Data is a buffer, it is converted to a string of 622 * hexadecimal values separated by commas." 623 */ 624 StringLength = (ObjDesc->Buffer.Length * 3); 625 break; 626 627 default: 628 return_ACPI_STATUS (AE_BAD_PARAMETER); 629 } 630 631 /* 632 * Create a new string object and string buffer 633 * (-1 because of extra separator included in StringLength from above) 634 * Allow creation of zero-length strings from zero-length buffers. 635 */ 636 if (StringLength) 637 { 638 StringLength--; 639 } 640 641 ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength); 642 if (!ReturnDesc) 643 { 644 return_ACPI_STATUS (AE_NO_MEMORY); 645 } 646 647 NewBuf = ReturnDesc->Buffer.Pointer; 648 649 /* 650 * Convert buffer bytes to hex or decimal values 651 * (separated by commas or spaces) 652 */ 653 for (i = 0; i < ObjDesc->Buffer.Length; i++) 654 { 655 NewBuf += AcpiExConvertToAscii ( 656 (UINT64) ObjDesc->Buffer.Pointer[i], Base, NewBuf, 1); 657 *NewBuf++ = Separator; /* each separated by a comma or space */ 658 } 659 660 /* 661 * Null terminate the string 662 * (overwrites final comma/space from above) 663 */ 664 if (ObjDesc->Buffer.Length) 665 { 666 NewBuf--; 667 } 668 *NewBuf = 0; 669 break; 670 671 default: 672 673 return_ACPI_STATUS (AE_TYPE); 674 } 675 676 *ResultDesc = ReturnDesc; 677 return_ACPI_STATUS (AE_OK); 678 } 679 680 681 /******************************************************************************* 682 * 683 * FUNCTION: AcpiExConvertToTargetType 684 * 685 * PARAMETERS: DestinationType - Current type of the destination 686 * SourceDesc - Source object to be converted. 687 * ResultDesc - Where the converted object is returned 688 * WalkState - Current method state 689 * 690 * RETURN: Status 691 * 692 * DESCRIPTION: Implements "implicit conversion" rules for storing an object. 693 * 694 ******************************************************************************/ 695 696 ACPI_STATUS 697 AcpiExConvertToTargetType ( 698 ACPI_OBJECT_TYPE DestinationType, 699 ACPI_OPERAND_OBJECT *SourceDesc, 700 ACPI_OPERAND_OBJECT **ResultDesc, 701 ACPI_WALK_STATE *WalkState) 702 { 703 ACPI_STATUS Status = AE_OK; 704 705 706 ACPI_FUNCTION_TRACE (ExConvertToTargetType); 707 708 709 /* Default behavior */ 710 711 *ResultDesc = SourceDesc; 712 713 /* 714 * If required by the target, 715 * perform implicit conversion on the source before we store it. 716 */ 717 switch (GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs)) 718 { 719 case ARGI_SIMPLE_TARGET: 720 case ARGI_FIXED_TARGET: 721 case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */ 722 723 switch (DestinationType) 724 { 725 case ACPI_TYPE_LOCAL_REGION_FIELD: 726 /* 727 * Named field can always handle conversions 728 */ 729 break; 730 731 default: 732 733 /* No conversion allowed for these types */ 734 735 if (DestinationType != SourceDesc->Common.Type) 736 { 737 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 738 "Explicit operator, will store (%s) over existing type (%s)\n", 739 AcpiUtGetObjectTypeName (SourceDesc), 740 AcpiUtGetTypeName (DestinationType))); 741 Status = AE_TYPE; 742 } 743 } 744 break; 745 746 case ARGI_TARGETREF: 747 case ARGI_STORE_TARGET: 748 749 switch (DestinationType) 750 { 751 case ACPI_TYPE_INTEGER: 752 case ACPI_TYPE_BUFFER_FIELD: 753 case ACPI_TYPE_LOCAL_BANK_FIELD: 754 case ACPI_TYPE_LOCAL_INDEX_FIELD: 755 /* 756 * These types require an Integer operand. We can convert 757 * a Buffer or a String to an Integer if necessary. 758 */ 759 Status = AcpiExConvertToInteger (SourceDesc, ResultDesc, 16); 760 break; 761 762 case ACPI_TYPE_STRING: 763 /* 764 * The operand must be a String. We can convert an 765 * Integer or Buffer if necessary 766 */ 767 Status = AcpiExConvertToString (SourceDesc, ResultDesc, 768 ACPI_IMPLICIT_CONVERT_HEX); 769 break; 770 771 case ACPI_TYPE_BUFFER: 772 /* 773 * The operand must be a Buffer. We can convert an 774 * Integer or String if necessary 775 */ 776 Status = AcpiExConvertToBuffer (SourceDesc, ResultDesc); 777 break; 778 779 default: 780 781 ACPI_ERROR ((AE_INFO, 782 "Bad destination type during conversion: 0x%X", 783 DestinationType)); 784 Status = AE_AML_INTERNAL; 785 break; 786 } 787 break; 788 789 case ARGI_REFERENCE: 790 /* 791 * CreateXxxxField cases - we are storing the field object into the name 792 */ 793 break; 794 795 default: 796 797 ACPI_ERROR ((AE_INFO, 798 "Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s", 799 GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs), 800 WalkState->Opcode, AcpiUtGetTypeName (DestinationType))); 801 Status = AE_AML_INTERNAL; 802 } 803 804 /* 805 * Source-to-Target conversion semantics: 806 * 807 * If conversion to the target type cannot be performed, then simply 808 * overwrite the target with the new object and type. 809 */ 810 if (Status == AE_TYPE) 811 { 812 Status = AE_OK; 813 } 814 815 return_ACPI_STATUS (Status); 816 } 817