1 /******************************************************************************
   2  *
   3  * Module Name: exconvrt - Object conversion routines
   4  *
   5  *****************************************************************************/
   6 
   7 /*
   8  * Copyright (C) 2000 - 2013, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43 
  44 
  45 #define __EXCONVRT_C__
  46 
  47 #include "acpi.h"
  48 #include "accommon.h"
  49 #include "acinterp.h"
  50 #include "amlcode.h"
  51 
  52 
  53 #define _COMPONENT          ACPI_EXECUTER
  54         ACPI_MODULE_NAME    ("exconvrt")
  55 
  56 /* Local prototypes */
  57 
  58 static UINT32
  59 AcpiExConvertToAscii (
  60     UINT64                  Integer,
  61     UINT16                  Base,
  62     UINT8                   *String,
  63     UINT8                   MaxLength);
  64 
  65 
  66 /*******************************************************************************
  67  *
  68  * FUNCTION:    AcpiExConvertToInteger
  69  *
  70  * PARAMETERS:  ObjDesc         - Object to be converted. Must be an
  71  *                                Integer, Buffer, or String
  72  *              ResultDesc      - Where the new Integer object is returned
  73  *              Flags           - Used for string conversion
  74  *
  75  * RETURN:      Status
  76  *
  77  * DESCRIPTION: Convert an ACPI Object to an integer.
  78  *
  79  ******************************************************************************/
  80 
  81 ACPI_STATUS
  82 AcpiExConvertToInteger (
  83     ACPI_OPERAND_OBJECT     *ObjDesc,
  84     ACPI_OPERAND_OBJECT     **ResultDesc,
  85     UINT32                  Flags)
  86 {
  87     ACPI_OPERAND_OBJECT     *ReturnDesc;
  88     UINT8                   *Pointer;
  89     UINT64                  Result;
  90     UINT32                  i;
  91     UINT32                  Count;
  92     ACPI_STATUS             Status;
  93 
  94 
  95     ACPI_FUNCTION_TRACE_PTR (ExConvertToInteger, ObjDesc);
  96 
  97 
  98     switch (ObjDesc->Common.Type)
  99     {
 100     case ACPI_TYPE_INTEGER:
 101 
 102         /* No conversion necessary */
 103 
 104         *ResultDesc = ObjDesc;
 105         return_ACPI_STATUS (AE_OK);
 106 
 107     case ACPI_TYPE_BUFFER:
 108     case ACPI_TYPE_STRING:
 109 
 110         /* Note: Takes advantage of common buffer/string fields */
 111 
 112         Pointer = ObjDesc->Buffer.Pointer;
 113         Count   = ObjDesc->Buffer.Length;
 114         break;
 115 
 116     default:
 117 
 118         return_ACPI_STATUS (AE_TYPE);
 119     }
 120 
 121     /*
 122      * Convert the buffer/string to an integer. Note that both buffers and
 123      * strings are treated as raw data - we don't convert ascii to hex for
 124      * strings.
 125      *
 126      * There are two terminating conditions for the loop:
 127      * 1) The size of an integer has been reached, or
 128      * 2) The end of the buffer or string has been reached
 129      */
 130     Result = 0;
 131 
 132     /* String conversion is different than Buffer conversion */
 133 
 134     switch (ObjDesc->Common.Type)
 135     {
 136     case ACPI_TYPE_STRING:
 137         /*
 138          * Convert string to an integer - for most cases, the string must be
 139          * hexadecimal as per the ACPI specification. The only exception (as
 140          * of ACPI 3.0) is that the ToInteger() operator allows both decimal
 141          * and hexadecimal strings (hex prefixed with "0x").
 142          */
 143         Status = AcpiUtStrtoul64 ((char *) Pointer, Flags, &Result);
 144         if (ACPI_FAILURE (Status))
 145         {
 146             return_ACPI_STATUS (Status);
 147         }
 148         break;
 149 
 150     case ACPI_TYPE_BUFFER:
 151 
 152         /* Check for zero-length buffer */
 153 
 154         if (!Count)
 155         {
 156             return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
 157         }
 158 
 159         /* Transfer no more than an integer's worth of data */
 160 
 161         if (Count > AcpiGbl_IntegerByteWidth)
 162         {
 163             Count = AcpiGbl_IntegerByteWidth;
 164         }
 165 
 166         /*
 167          * Convert buffer to an integer - we simply grab enough raw data
 168          * from the buffer to fill an integer
 169          */
 170         for (i = 0; i < Count; i++)
 171         {
 172             /*
 173              * Get next byte and shift it into the Result.
 174              * Little endian is used, meaning that the first byte of the buffer
 175              * is the LSB of the integer
 176              */
 177             Result |= (((UINT64) Pointer[i]) << (i * 8));
 178         }
 179         break;
 180 
 181     default:
 182 
 183         /* No other types can get here */
 184 
 185         break;
 186     }
 187 
 188     /* Create a new integer */
 189 
 190     ReturnDesc = AcpiUtCreateIntegerObject (Result);
 191     if (!ReturnDesc)
 192     {
 193         return_ACPI_STATUS (AE_NO_MEMORY);
 194     }
 195 
 196     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
 197         ACPI_FORMAT_UINT64 (Result)));
 198 
 199     /* Save the Result */
 200 
 201     (void) AcpiExTruncateFor32bitTable (ReturnDesc);
 202     *ResultDesc = ReturnDesc;
 203     return_ACPI_STATUS (AE_OK);
 204 }
 205 
 206 
 207 /*******************************************************************************
 208  *
 209  * FUNCTION:    AcpiExConvertToBuffer
 210  *
 211  * PARAMETERS:  ObjDesc         - Object to be converted. Must be an
 212  *                                Integer, Buffer, or String
 213  *              ResultDesc      - Where the new buffer object is returned
 214  *
 215  * RETURN:      Status
 216  *
 217  * DESCRIPTION: Convert an ACPI Object to a Buffer
 218  *
 219  ******************************************************************************/
 220 
 221 ACPI_STATUS
 222 AcpiExConvertToBuffer (
 223     ACPI_OPERAND_OBJECT     *ObjDesc,
 224     ACPI_OPERAND_OBJECT     **ResultDesc)
 225 {
 226     ACPI_OPERAND_OBJECT     *ReturnDesc;
 227     UINT8                   *NewBuf;
 228 
 229 
 230     ACPI_FUNCTION_TRACE_PTR (ExConvertToBuffer, ObjDesc);
 231 
 232 
 233     switch (ObjDesc->Common.Type)
 234     {
 235     case ACPI_TYPE_BUFFER:
 236 
 237         /* No conversion necessary */
 238 
 239         *ResultDesc = ObjDesc;
 240         return_ACPI_STATUS (AE_OK);
 241 
 242 
 243     case ACPI_TYPE_INTEGER:
 244         /*
 245          * Create a new Buffer object.
 246          * Need enough space for one integer
 247          */
 248         ReturnDesc = AcpiUtCreateBufferObject (AcpiGbl_IntegerByteWidth);
 249         if (!ReturnDesc)
 250         {
 251             return_ACPI_STATUS (AE_NO_MEMORY);
 252         }
 253 
 254         /* Copy the integer to the buffer, LSB first */
 255 
 256         NewBuf = ReturnDesc->Buffer.Pointer;
 257         ACPI_MEMCPY (NewBuf,
 258                         &ObjDesc->Integer.Value,
 259                         AcpiGbl_IntegerByteWidth);
 260         break;
 261 
 262     case ACPI_TYPE_STRING:
 263         /*
 264          * Create a new Buffer object
 265          * Size will be the string length
 266          *
 267          * NOTE: Add one to the string length to include the null terminator.
 268          * The ACPI spec is unclear on this subject, but there is existing
 269          * ASL/AML code that depends on the null being transferred to the new
 270          * buffer.
 271          */
 272         ReturnDesc = AcpiUtCreateBufferObject (
 273                         (ACPI_SIZE) ObjDesc->String.Length + 1);
 274         if (!ReturnDesc)
 275         {
 276             return_ACPI_STATUS (AE_NO_MEMORY);
 277         }
 278 
 279         /* Copy the string to the buffer */
 280 
 281         NewBuf = ReturnDesc->Buffer.Pointer;
 282         ACPI_STRNCPY ((char *) NewBuf, (char *) ObjDesc->String.Pointer,
 283             ObjDesc->String.Length);
 284         break;
 285 
 286     default:
 287 
 288         return_ACPI_STATUS (AE_TYPE);
 289     }
 290 
 291     /* Mark buffer initialized */
 292 
 293     ReturnDesc->Common.Flags |= AOPOBJ_DATA_VALID;
 294     *ResultDesc = ReturnDesc;
 295     return_ACPI_STATUS (AE_OK);
 296 }
 297 
 298 
 299 /*******************************************************************************
 300  *
 301  * FUNCTION:    AcpiExConvertToAscii
 302  *
 303  * PARAMETERS:  Integer         - Value to be converted
 304  *              Base            - ACPI_STRING_DECIMAL or ACPI_STRING_HEX
 305  *              String          - Where the string is returned
 306  *              DataWidth       - Size of data item to be converted, in bytes
 307  *
 308  * RETURN:      Actual string length
 309  *
 310  * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string
 311  *
 312  ******************************************************************************/
 313 
 314 static UINT32
 315 AcpiExConvertToAscii (
 316     UINT64                  Integer,
 317     UINT16                  Base,
 318     UINT8                   *String,
 319     UINT8                   DataWidth)
 320 {
 321     UINT64                  Digit;
 322     UINT32                  i;
 323     UINT32                  j;
 324     UINT32                  k = 0;
 325     UINT32                  HexLength;
 326     UINT32                  DecimalLength;
 327     UINT32                  Remainder;
 328     BOOLEAN                 SupressZeros;
 329 
 330 
 331     ACPI_FUNCTION_ENTRY ();
 332 
 333 
 334     switch (Base)
 335     {
 336     case 10:
 337 
 338         /* Setup max length for the decimal number */
 339 
 340         switch (DataWidth)
 341         {
 342         case 1:
 343 
 344             DecimalLength = ACPI_MAX8_DECIMAL_DIGITS;
 345             break;
 346 
 347         case 4:
 348 
 349             DecimalLength = ACPI_MAX32_DECIMAL_DIGITS;
 350             break;
 351 
 352         case 8:
 353         default:
 354 
 355             DecimalLength = ACPI_MAX64_DECIMAL_DIGITS;
 356             break;
 357         }
 358 
 359         SupressZeros = TRUE;     /* No leading zeros */
 360         Remainder = 0;
 361 
 362         for (i = DecimalLength; i > 0; i--)
 363         {
 364             /* Divide by nth factor of 10 */
 365 
 366             Digit = Integer;
 367             for (j = 0; j < i; j++)
 368             {
 369                 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Remainder);
 370             }
 371 
 372             /* Handle leading zeros */
 373 
 374             if (Remainder != 0)
 375             {
 376                 SupressZeros = FALSE;
 377             }
 378 
 379             if (!SupressZeros)
 380             {
 381                 String[k] = (UINT8) (ACPI_ASCII_ZERO + Remainder);
 382                 k++;
 383             }
 384         }
 385         break;
 386 
 387     case 16:
 388 
 389         /* HexLength: 2 ascii hex chars per data byte */
 390 
 391         HexLength = ACPI_MUL_2 (DataWidth);
 392         for (i = 0, j = (HexLength-1); i < HexLength; i++, j--)
 393         {
 394             /* Get one hex digit, most significant digits first */
 395 
 396             String[k] = (UINT8) AcpiUtHexToAsciiChar (Integer, ACPI_MUL_4 (j));
 397             k++;
 398         }
 399         break;
 400 
 401     default:
 402         return (0);
 403     }
 404 
 405     /*
 406      * Since leading zeros are suppressed, we must check for the case where
 407      * the integer equals 0
 408      *
 409      * Finally, null terminate the string and return the length
 410      */
 411     if (!k)
 412     {
 413         String [0] = ACPI_ASCII_ZERO;
 414         k = 1;
 415     }
 416 
 417     String [k] = 0;
 418     return ((UINT32) k);
 419 }
 420 
 421 
 422 /*******************************************************************************
 423  *
 424  * FUNCTION:    AcpiExConvertToString
 425  *
 426  * PARAMETERS:  ObjDesc         - Object to be converted. Must be an
 427  *                                Integer, Buffer, or String
 428  *              ResultDesc      - Where the string object is returned
 429  *              Type            - String flags (base and conversion type)
 430  *
 431  * RETURN:      Status
 432  *
 433  * DESCRIPTION: Convert an ACPI Object to a string
 434  *
 435  ******************************************************************************/
 436 
 437 ACPI_STATUS
 438 AcpiExConvertToString (
 439     ACPI_OPERAND_OBJECT     *ObjDesc,
 440     ACPI_OPERAND_OBJECT     **ResultDesc,
 441     UINT32                  Type)
 442 {
 443     ACPI_OPERAND_OBJECT     *ReturnDesc;
 444     UINT8                   *NewBuf;
 445     UINT32                  i;
 446     UINT32                  StringLength = 0;
 447     UINT16                  Base = 16;
 448     UINT8                   Separator = ',';
 449 
 450 
 451     ACPI_FUNCTION_TRACE_PTR (ExConvertToString, ObjDesc);
 452 
 453 
 454     switch (ObjDesc->Common.Type)
 455     {
 456     case ACPI_TYPE_STRING:
 457 
 458         /* No conversion necessary */
 459 
 460         *ResultDesc = ObjDesc;
 461         return_ACPI_STATUS (AE_OK);
 462 
 463     case ACPI_TYPE_INTEGER:
 464 
 465         switch (Type)
 466         {
 467         case ACPI_EXPLICIT_CONVERT_DECIMAL:
 468 
 469             /* Make room for maximum decimal number */
 470 
 471             StringLength = ACPI_MAX_DECIMAL_DIGITS;
 472             Base = 10;
 473             break;
 474 
 475         default:
 476 
 477             /* Two hex string characters for each integer byte */
 478 
 479             StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth);
 480             break;
 481         }
 482 
 483         /*
 484          * Create a new String
 485          * Need enough space for one ASCII integer (plus null terminator)
 486          */
 487         ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength);
 488         if (!ReturnDesc)
 489         {
 490             return_ACPI_STATUS (AE_NO_MEMORY);
 491         }
 492 
 493         NewBuf = ReturnDesc->Buffer.Pointer;
 494 
 495         /* Convert integer to string */
 496 
 497         StringLength = AcpiExConvertToAscii (ObjDesc->Integer.Value, Base,
 498                             NewBuf, AcpiGbl_IntegerByteWidth);
 499 
 500         /* Null terminate at the correct place */
 501 
 502         ReturnDesc->String.Length = StringLength;
 503         NewBuf [StringLength] = 0;
 504         break;
 505 
 506     case ACPI_TYPE_BUFFER:
 507 
 508         /* Setup string length, base, and separator */
 509 
 510         switch (Type)
 511         {
 512         case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by ToDecimalString */
 513             /*
 514              * From ACPI: "If Data is a buffer, it is converted to a string of
 515              * decimal values separated by commas."
 516              */
 517             Base = 10;
 518 
 519             /*
 520              * Calculate the final string length. Individual string values
 521              * are variable length (include separator for each)
 522              */
 523             for (i = 0; i < ObjDesc->Buffer.Length; i++)
 524             {
 525                 if (ObjDesc->Buffer.Pointer[i] >= 100)
 526                 {
 527                     StringLength += 4;
 528                 }
 529                 else if (ObjDesc->Buffer.Pointer[i] >= 10)
 530                 {
 531                     StringLength += 3;
 532                 }
 533                 else
 534                 {
 535                     StringLength += 2;
 536                 }
 537             }
 538             break;
 539 
 540         case ACPI_IMPLICIT_CONVERT_HEX:
 541             /*
 542              * From the ACPI spec:
 543              *"The entire contents of the buffer are converted to a string of
 544              * two-character hexadecimal numbers, each separated by a space."
 545              */
 546             Separator = ' ';
 547             StringLength = (ObjDesc->Buffer.Length * 3);
 548             break;
 549 
 550         case ACPI_EXPLICIT_CONVERT_HEX:     /* Used by ToHexString */
 551             /*
 552              * From ACPI: "If Data is a buffer, it is converted to a string of
 553              * hexadecimal values separated by commas."
 554              */
 555             StringLength = (ObjDesc->Buffer.Length * 3);
 556             break;
 557 
 558         default:
 559             return_ACPI_STATUS (AE_BAD_PARAMETER);
 560         }
 561 
 562         /*
 563          * Create a new string object and string buffer
 564          * (-1 because of extra separator included in StringLength from above)
 565          * Allow creation of zero-length strings from zero-length buffers.
 566          */
 567         if (StringLength)
 568         {
 569             StringLength--;
 570         }
 571 
 572         ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength);
 573         if (!ReturnDesc)
 574         {
 575             return_ACPI_STATUS (AE_NO_MEMORY);
 576         }
 577 
 578         NewBuf = ReturnDesc->Buffer.Pointer;
 579 
 580         /*
 581          * Convert buffer bytes to hex or decimal values
 582          * (separated by commas or spaces)
 583          */
 584         for (i = 0; i < ObjDesc->Buffer.Length; i++)
 585         {
 586             NewBuf += AcpiExConvertToAscii (
 587                         (UINT64) ObjDesc->Buffer.Pointer[i], Base,
 588                         NewBuf, 1);
 589             *NewBuf++ = Separator; /* each separated by a comma or space */
 590         }
 591 
 592         /*
 593          * Null terminate the string
 594          * (overwrites final comma/space from above)
 595          */
 596         if (ObjDesc->Buffer.Length)
 597         {
 598             NewBuf--;
 599         }
 600         *NewBuf = 0;
 601         break;
 602 
 603     default:
 604 
 605         return_ACPI_STATUS (AE_TYPE);
 606     }
 607 
 608     *ResultDesc = ReturnDesc;
 609     return_ACPI_STATUS (AE_OK);
 610 }
 611 
 612 
 613 /*******************************************************************************
 614  *
 615  * FUNCTION:    AcpiExConvertToTargetType
 616  *
 617  * PARAMETERS:  DestinationType     - Current type of the destination
 618  *              SourceDesc          - Source object to be converted.
 619  *              ResultDesc          - Where the converted object is returned
 620  *              WalkState           - Current method state
 621  *
 622  * RETURN:      Status
 623  *
 624  * DESCRIPTION: Implements "implicit conversion" rules for storing an object.
 625  *
 626  ******************************************************************************/
 627 
 628 ACPI_STATUS
 629 AcpiExConvertToTargetType (
 630     ACPI_OBJECT_TYPE        DestinationType,
 631     ACPI_OPERAND_OBJECT     *SourceDesc,
 632     ACPI_OPERAND_OBJECT     **ResultDesc,
 633     ACPI_WALK_STATE         *WalkState)
 634 {
 635     ACPI_STATUS             Status = AE_OK;
 636 
 637 
 638     ACPI_FUNCTION_TRACE (ExConvertToTargetType);
 639 
 640 
 641     /* Default behavior */
 642 
 643     *ResultDesc = SourceDesc;
 644 
 645     /*
 646      * If required by the target,
 647      * perform implicit conversion on the source before we store it.
 648      */
 649     switch (GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs))
 650     {
 651     case ARGI_SIMPLE_TARGET:
 652     case ARGI_FIXED_TARGET:
 653     case ARGI_INTEGER_REF:      /* Handles Increment, Decrement cases */
 654 
 655         switch (DestinationType)
 656         {
 657         case ACPI_TYPE_LOCAL_REGION_FIELD:
 658             /*
 659              * Named field can always handle conversions
 660              */
 661             break;
 662 
 663         default:
 664 
 665             /* No conversion allowed for these types */
 666 
 667             if (DestinationType != SourceDesc->Common.Type)
 668             {
 669                 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 670                     "Explicit operator, will store (%s) over existing type (%s)\n",
 671                     AcpiUtGetObjectTypeName (SourceDesc),
 672                     AcpiUtGetTypeName (DestinationType)));
 673                 Status = AE_TYPE;
 674             }
 675         }
 676         break;
 677 
 678     case ARGI_TARGETREF:
 679 
 680         switch (DestinationType)
 681         {
 682         case ACPI_TYPE_INTEGER:
 683         case ACPI_TYPE_BUFFER_FIELD:
 684         case ACPI_TYPE_LOCAL_BANK_FIELD:
 685         case ACPI_TYPE_LOCAL_INDEX_FIELD:
 686             /*
 687              * These types require an Integer operand. We can convert
 688              * a Buffer or a String to an Integer if necessary.
 689              */
 690             Status = AcpiExConvertToInteger (SourceDesc, ResultDesc,
 691                         16);
 692             break;
 693 
 694         case ACPI_TYPE_STRING:
 695             /*
 696              * The operand must be a String. We can convert an
 697              * Integer or Buffer if necessary
 698              */
 699             Status = AcpiExConvertToString (SourceDesc, ResultDesc,
 700                         ACPI_IMPLICIT_CONVERT_HEX);
 701             break;
 702 
 703         case ACPI_TYPE_BUFFER:
 704             /*
 705              * The operand must be a Buffer. We can convert an
 706              * Integer or String if necessary
 707              */
 708             Status = AcpiExConvertToBuffer (SourceDesc, ResultDesc);
 709             break;
 710 
 711         default:
 712 
 713             ACPI_ERROR ((AE_INFO, "Bad destination type during conversion: 0x%X",
 714                 DestinationType));
 715             Status = AE_AML_INTERNAL;
 716             break;
 717         }
 718         break;
 719 
 720     case ARGI_REFERENCE:
 721         /*
 722          * CreateXxxxField cases - we are storing the field object into the name
 723          */
 724         break;
 725 
 726     default:
 727 
 728         ACPI_ERROR ((AE_INFO,
 729             "Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s",
 730             GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs),
 731             WalkState->Opcode, AcpiUtGetTypeName (DestinationType)));
 732         Status = AE_AML_INTERNAL;
 733     }
 734 
 735     /*
 736      * Source-to-Target conversion semantics:
 737      *
 738      * If conversion to the target type cannot be performed, then simply
 739      * overwrite the target with the new object and type.
 740      */
 741     if (Status == AE_TYPE)
 742     {
 743         Status = AE_OK;
 744     }
 745 
 746     return_ACPI_STATUS (Status);
 747 }