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 - 2024, 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 <contrib/dev/acpica/include/acpi.h> 153 #include <contrib/dev/acpica/include/accommon.h> 154 #include <contrib/dev/acpica/include/acinterp.h> 155 #include <contrib/dev/acpica/include/amlcode.h> 156 157 158 #define _COMPONENT ACPI_EXECUTER 159 ACPI_MODULE_NAME ("exconvrt") 160 161 /* Local prototypes */ 162 163 static UINT32 164 AcpiExConvertToAscii ( 165 UINT64 Integer, 166 UINT16 Base, 167 UINT8 *String, 168 UINT8 MaxLength, 169 BOOLEAN LeadingZeros); 170 171 172 /******************************************************************************* 173 * 174 * FUNCTION: AcpiExConvertToInteger 175 * 176 * PARAMETERS: ObjDesc - Object to be converted. Must be an 177 * Integer, Buffer, or String 178 * ResultDesc - Where the new Integer object is returned 179 * ImplicitConversion - Used for string conversion 180 * 181 * RETURN: Status 182 * 183 * DESCRIPTION: Convert an ACPI Object to an integer. 184 * 185 ******************************************************************************/ 186 187 ACPI_STATUS 188 AcpiExConvertToInteger ( 189 ACPI_OPERAND_OBJECT *ObjDesc, 190 ACPI_OPERAND_OBJECT **ResultDesc, 191 UINT32 ImplicitConversion) 192 { 193 ACPI_OPERAND_OBJECT *ReturnDesc; 194 UINT8 *Pointer; 195 UINT64 Result; 196 UINT32 i; 197 UINT32 Count; 198 199 200 ACPI_FUNCTION_TRACE_PTR (ExConvertToInteger, ObjDesc); 201 202 203 switch (ObjDesc->Common.Type) 204 { 205 case ACPI_TYPE_INTEGER: 206 207 /* No conversion necessary */ 208 209 *ResultDesc = ObjDesc; 210 return_ACPI_STATUS (AE_OK); 211 212 case ACPI_TYPE_BUFFER: 213 case ACPI_TYPE_STRING: 214 215 /* Note: Takes advantage of common buffer/string fields */ 216 217 Pointer = ObjDesc->Buffer.Pointer; 218 Count = ObjDesc->Buffer.Length; 219 break; 220 221 default: 222 223 return_ACPI_STATUS (AE_TYPE); 224 } 225 226 /* 227 * Convert the buffer/string to an integer. Note that both buffers and 228 * strings are treated as raw data - we don't convert ascii to hex for 229 * strings. 230 * 231 * There are two terminating conditions for the loop: 232 * 1) The size of an integer has been reached, or 233 * 2) The end of the buffer or string has been reached 234 */ 235 Result = 0; 236 237 /* String conversion is different than Buffer conversion */ 238 239 switch (ObjDesc->Common.Type) 240 { 241 case ACPI_TYPE_STRING: 242 /* 243 * Convert string to an integer - for most cases, the string must be 244 * hexadecimal as per the ACPI specification. The only exception (as 245 * of ACPI 3.0) is that the ToInteger() operator allows both decimal 246 * and hexadecimal strings (hex prefixed with "0x"). 247 * 248 * Explicit conversion is used only by ToInteger. 249 * All other string-to-integer conversions are implicit conversions. 250 */ 251 if (ImplicitConversion) 252 { 253 Result = AcpiUtImplicitStrtoul64 (ACPI_CAST_PTR (char, Pointer)); 254 } 255 else 256 { 257 Result = AcpiUtExplicitStrtoul64 (ACPI_CAST_PTR (char, Pointer)); 258 } 259 break; 260 261 case ACPI_TYPE_BUFFER: 262 263 /* Check for zero-length buffer */ 264 265 if (!Count) 266 { 267 return_ACPI_STATUS (AE_AML_BUFFER_LIMIT); 268 } 269 270 /* Transfer no more than an integer's worth of data */ 271 272 if (Count > AcpiGbl_IntegerByteWidth) 273 { 274 Count = AcpiGbl_IntegerByteWidth; 275 } 276 277 /* 278 * Convert buffer to an integer - we simply grab enough raw data 279 * from the buffer to fill an integer 280 */ 281 for (i = 0; i < Count; i++) 282 { 283 /* 284 * Get next byte and shift it into the Result. 285 * Little endian is used, meaning that the first byte of the buffer 286 * is the LSB of the integer 287 */ 288 Result |= (((UINT64) Pointer[i]) << (i * 8)); 289 } 290 break; 291 292 default: 293 294 /* No other types can get here */ 295 296 break; 297 } 298 299 /* Create a new integer */ 300 301 ReturnDesc = AcpiUtCreateIntegerObject (Result); 302 if (!ReturnDesc) 303 { 304 return_ACPI_STATUS (AE_NO_MEMORY); 305 } 306 307 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n", 308 ACPI_FORMAT_UINT64 (Result))); 309 310 /* Save the Result */ 311 312 (void) AcpiExTruncateFor32bitTable (ReturnDesc); 313 *ResultDesc = ReturnDesc; 314 return_ACPI_STATUS (AE_OK); 315 } 316 317 318 /******************************************************************************* 319 * 320 * FUNCTION: AcpiExConvertToBuffer 321 * 322 * PARAMETERS: ObjDesc - Object to be converted. Must be an 323 * Integer, Buffer, or String 324 * ResultDesc - Where the new buffer object is returned 325 * 326 * RETURN: Status 327 * 328 * DESCRIPTION: Convert an ACPI Object to a Buffer 329 * 330 ******************************************************************************/ 331 332 ACPI_STATUS 333 AcpiExConvertToBuffer ( 334 ACPI_OPERAND_OBJECT *ObjDesc, 335 ACPI_OPERAND_OBJECT **ResultDesc) 336 { 337 ACPI_OPERAND_OBJECT *ReturnDesc; 338 UINT8 *NewBuf; 339 340 341 ACPI_FUNCTION_TRACE_PTR (ExConvertToBuffer, ObjDesc); 342 343 344 switch (ObjDesc->Common.Type) 345 { 346 case ACPI_TYPE_BUFFER: 347 348 /* No conversion necessary */ 349 350 *ResultDesc = ObjDesc; 351 return_ACPI_STATUS (AE_OK); 352 353 354 case ACPI_TYPE_INTEGER: 355 /* 356 * Create a new Buffer object. 357 * Need enough space for one integer 358 */ 359 ReturnDesc = AcpiUtCreateBufferObject (AcpiGbl_IntegerByteWidth); 360 if (!ReturnDesc) 361 { 362 return_ACPI_STATUS (AE_NO_MEMORY); 363 } 364 365 /* Copy the integer to the buffer, LSB first */ 366 367 NewBuf = ReturnDesc->Buffer.Pointer; 368 memcpy (NewBuf, &ObjDesc->Integer.Value, AcpiGbl_IntegerByteWidth); 369 break; 370 371 case ACPI_TYPE_STRING: 372 /* 373 * Create a new Buffer object 374 * Size will be the string length 375 * 376 * NOTE: Add one to the string length to include the null terminator. 377 * The ACPI spec is unclear on this subject, but there is existing 378 * ASL/AML code that depends on the null being transferred to the new 379 * buffer. 380 */ 381 ReturnDesc = AcpiUtCreateBufferObject ((ACPI_SIZE) 382 ObjDesc->String.Length + 1); 383 if (!ReturnDesc) 384 { 385 return_ACPI_STATUS (AE_NO_MEMORY); 386 } 387 388 /* Copy the string to the buffer */ 389 390 NewBuf = ReturnDesc->Buffer.Pointer; 391 strncpy ((char *) NewBuf, (char *) ObjDesc->String.Pointer, 392 ObjDesc->String.Length); 393 break; 394 395 default: 396 397 return_ACPI_STATUS (AE_TYPE); 398 } 399 400 /* Mark buffer initialized */ 401 402 ReturnDesc->Common.Flags |= AOPOBJ_DATA_VALID; 403 *ResultDesc = ReturnDesc; 404 return_ACPI_STATUS (AE_OK); 405 } 406 407 408 /******************************************************************************* 409 * 410 * FUNCTION: AcpiExConvertToAscii 411 * 412 * PARAMETERS: Integer - Value to be converted 413 * Base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX 414 * String - Where the string is returned 415 * DataWidth - Size of data item to be converted, in bytes 416 * LeadingZeros - Allow leading zeros 417 * 418 * RETURN: Actual string length 419 * 420 * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string 421 * 422 ******************************************************************************/ 423 424 static UINT32 425 AcpiExConvertToAscii ( 426 UINT64 Integer, 427 UINT16 Base, 428 UINT8 *String, 429 UINT8 DataWidth, 430 BOOLEAN LeadingZeros) 431 { 432 UINT64 Digit; 433 UINT32 i; 434 UINT32 j; 435 UINT32 k = 0; 436 UINT32 HexLength; 437 UINT32 DecimalLength; 438 UINT32 Remainder; 439 BOOLEAN SupressZeros = !LeadingZeros; 440 UINT8 HexChar; 441 442 443 ACPI_FUNCTION_ENTRY (); 444 445 446 switch (Base) 447 { 448 case 10: 449 450 /* Setup max length for the decimal number */ 451 452 switch (DataWidth) 453 { 454 case 1: 455 456 DecimalLength = ACPI_MAX8_DECIMAL_DIGITS; 457 break; 458 459 case 4: 460 461 DecimalLength = ACPI_MAX32_DECIMAL_DIGITS; 462 break; 463 464 case 8: 465 default: 466 467 DecimalLength = ACPI_MAX64_DECIMAL_DIGITS; 468 break; 469 } 470 471 Remainder = 0; 472 473 for (i = DecimalLength; i > 0; i--) 474 { 475 /* Divide by nth factor of 10 */ 476 477 Digit = Integer; 478 for (j = 0; j < i; j++) 479 { 480 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Remainder); 481 } 482 483 /* Handle leading zeros */ 484 485 if (Remainder != 0) 486 { 487 SupressZeros = FALSE; 488 } 489 490 if (!SupressZeros) 491 { 492 String[k] = (UINT8) (ACPI_ASCII_ZERO + Remainder); 493 k++; 494 } 495 } 496 break; 497 498 case 16: 499 500 /* HexLength: 2 ascii hex chars per data byte */ 501 502 HexLength = (DataWidth * 2); 503 for (i = 0, j = (HexLength-1); i < HexLength; i++, j--) 504 { 505 /* Get one hex digit, most significant digits first */ 506 507 HexChar = (UINT8) 508 AcpiUtHexToAsciiChar (Integer, ACPI_MUL_4 (j)); 509 510 /* Supress leading zeros until the first non-zero character */ 511 512 if (HexChar == ACPI_ASCII_ZERO && SupressZeros) 513 { 514 continue; 515 } 516 517 SupressZeros = FALSE; 518 String[k] = HexChar; 519 k++; 520 } 521 break; 522 523 default: 524 return (0); 525 } 526 527 /* 528 * Since leading zeros are suppressed, we must check for the case where 529 * the integer equals 0 530 * 531 * Finally, null terminate the string and return the length 532 */ 533 if (!k) 534 { 535 String [0] = ACPI_ASCII_ZERO; 536 k = 1; 537 } 538 539 String [k] = 0; 540 return ((UINT32) k); 541 } 542 543 544 /******************************************************************************* 545 * 546 * FUNCTION: AcpiExConvertToString 547 * 548 * PARAMETERS: ObjDesc - Object to be converted. Must be an 549 * Integer, Buffer, or String 550 * ResultDesc - Where the string object is returned 551 * Type - String flags (base and conversion type) 552 * 553 * RETURN: Status 554 * 555 * DESCRIPTION: Convert an ACPI Object to a string. Supports both implicit 556 * and explicit conversions and related rules. 557 * 558 ******************************************************************************/ 559 560 ACPI_STATUS 561 AcpiExConvertToString ( 562 ACPI_OPERAND_OBJECT *ObjDesc, 563 ACPI_OPERAND_OBJECT **ResultDesc, 564 UINT32 Type) 565 { 566 ACPI_OPERAND_OBJECT *ReturnDesc; 567 UINT8 *NewBuf; 568 UINT32 i; 569 UINT32 StringLength = 0; 570 UINT16 Base = 16; 571 UINT8 Separator = ','; 572 BOOLEAN LeadingZeros; 573 574 575 ACPI_FUNCTION_TRACE_PTR (ExConvertToString, ObjDesc); 576 577 578 switch (ObjDesc->Common.Type) 579 { 580 case ACPI_TYPE_STRING: 581 582 /* No conversion necessary */ 583 584 *ResultDesc = ObjDesc; 585 return_ACPI_STATUS (AE_OK); 586 587 case ACPI_TYPE_INTEGER: 588 589 switch (Type) 590 { 591 case ACPI_EXPLICIT_CONVERT_DECIMAL: 592 /* 593 * From ToDecimalString, integer source. 594 * 595 * Make room for the maximum decimal number size 596 */ 597 StringLength = ACPI_MAX_DECIMAL_DIGITS; 598 LeadingZeros = FALSE; 599 Base = 10; 600 break; 601 602 case ACPI_EXPLICIT_CONVERT_HEX: 603 /* 604 * From ToHexString. 605 * 606 * Supress leading zeros and append "0x" 607 */ 608 StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth) + 2; 609 LeadingZeros = FALSE; 610 break; 611 default: 612 613 /* Two hex string characters for each integer byte */ 614 615 StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth); 616 LeadingZeros = TRUE; 617 break; 618 } 619 620 /* 621 * Create a new String 622 * Need enough space for one ASCII integer (plus null terminator) 623 */ 624 ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength); 625 if (!ReturnDesc) 626 { 627 return_ACPI_STATUS (AE_NO_MEMORY); 628 } 629 630 NewBuf = ReturnDesc->Buffer.Pointer; 631 if (Type == ACPI_EXPLICIT_CONVERT_HEX) 632 { 633 /* Append "0x" prefix for explicit hex conversion */ 634 635 *NewBuf++ = '0'; 636 *NewBuf++ = 'x'; 637 } 638 639 /* Convert integer to string */ 640 641 StringLength = AcpiExConvertToAscii ( 642 ObjDesc->Integer.Value, Base, NewBuf, AcpiGbl_IntegerByteWidth, LeadingZeros); 643 644 /* Null terminate at the correct place */ 645 646 ReturnDesc->String.Length = StringLength; 647 if (Type == ACPI_EXPLICIT_CONVERT_HEX) 648 { 649 /* Take "0x" prefix into account */ 650 651 ReturnDesc->String.Length += 2; 652 } 653 654 NewBuf [StringLength] = 0; 655 break; 656 657 case ACPI_TYPE_BUFFER: 658 659 /* Setup string length, base, and separator */ 660 661 switch (Type) 662 { 663 case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by ToDecimalString */ 664 /* 665 * Explicit conversion from the ToDecimalString ASL operator. 666 * 667 * From ACPI: "If the input is a buffer, it is converted to a 668 * a string of decimal values separated by commas." 669 */ 670 LeadingZeros = FALSE; 671 Base = 10; 672 673 /* 674 * Calculate the final string length. Individual string values 675 * are variable length (include separator for each) 676 */ 677 for (i = 0; i < ObjDesc->Buffer.Length; i++) 678 { 679 if (ObjDesc->Buffer.Pointer[i] >= 100) 680 { 681 StringLength += 4; 682 } 683 else if (ObjDesc->Buffer.Pointer[i] >= 10) 684 { 685 StringLength += 3; 686 } 687 else 688 { 689 StringLength += 2; 690 } 691 } 692 break; 693 694 case ACPI_IMPLICIT_CONVERT_HEX: 695 /* 696 * Implicit buffer-to-string conversion 697 * 698 * From the ACPI spec: 699 * "The entire contents of the buffer are converted to a string of 700 * two-character hexadecimal numbers, each separated by a space." 701 * 702 * Each hex number is prefixed with 0x (11/2018) 703 */ 704 LeadingZeros = TRUE; 705 Separator = ' '; 706 StringLength = (ObjDesc->Buffer.Length * 5); 707 break; 708 709 case ACPI_EXPLICIT_CONVERT_HEX: 710 /* 711 * Explicit conversion from the ToHexString ASL operator. 712 * 713 * From ACPI: "If Data is a buffer, it is converted to a string of 714 * hexadecimal values separated by commas." 715 * 716 * Each hex number is prefixed with 0x (11/2018) 717 */ 718 LeadingZeros = TRUE; 719 Separator = ','; 720 StringLength = (ObjDesc->Buffer.Length * 5); 721 break; 722 723 default: 724 return_ACPI_STATUS (AE_BAD_PARAMETER); 725 } 726 727 /* 728 * Create a new string object and string buffer 729 * (-1 because of extra separator included in StringLength from above) 730 * Allow creation of zero-length strings from zero-length buffers. 731 */ 732 if (StringLength) 733 { 734 StringLength--; 735 } 736 737 ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength); 738 if (!ReturnDesc) 739 { 740 return_ACPI_STATUS (AE_NO_MEMORY); 741 } 742 743 NewBuf = ReturnDesc->Buffer.Pointer; 744 745 /* 746 * Convert buffer bytes to hex or decimal values 747 * (separated by commas or spaces) 748 */ 749 for (i = 0; i < ObjDesc->Buffer.Length; i++) 750 { 751 if (Base == 16) 752 { 753 /* Emit 0x prefix for explicit/implicit hex conversion */ 754 755 *NewBuf++ = '0'; 756 *NewBuf++ = 'x'; 757 } 758 759 NewBuf += AcpiExConvertToAscii ( 760 (UINT64) ObjDesc->Buffer.Pointer[i], Base, NewBuf, 1, LeadingZeros); 761 762 /* Each digit is separated by either a comma or space */ 763 764 *NewBuf++ = Separator; 765 } 766 767 /* 768 * Null terminate the string 769 * (overwrites final comma/space from above) 770 */ 771 if (ObjDesc->Buffer.Length) 772 { 773 NewBuf--; 774 } 775 *NewBuf = 0; 776 break; 777 778 default: 779 780 return_ACPI_STATUS (AE_TYPE); 781 } 782 783 *ResultDesc = ReturnDesc; 784 return_ACPI_STATUS (AE_OK); 785 } 786 787 788 /******************************************************************************* 789 * 790 * FUNCTION: AcpiExConvertToTargetType 791 * 792 * PARAMETERS: DestinationType - Current type of the destination 793 * SourceDesc - Source object to be converted. 794 * ResultDesc - Where the converted object is returned 795 * WalkState - Current method state 796 * 797 * RETURN: Status 798 * 799 * DESCRIPTION: Implements "implicit conversion" rules for storing an object. 800 * 801 ******************************************************************************/ 802 803 ACPI_STATUS 804 AcpiExConvertToTargetType ( 805 ACPI_OBJECT_TYPE DestinationType, 806 ACPI_OPERAND_OBJECT *SourceDesc, 807 ACPI_OPERAND_OBJECT **ResultDesc, 808 ACPI_WALK_STATE *WalkState) 809 { 810 ACPI_STATUS Status = AE_OK; 811 812 813 ACPI_FUNCTION_TRACE (ExConvertToTargetType); 814 815 816 /* Default behavior */ 817 818 *ResultDesc = SourceDesc; 819 820 /* 821 * If required by the target, 822 * perform implicit conversion on the source before we store it. 823 */ 824 switch (GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs)) 825 { 826 case ARGI_SIMPLE_TARGET: 827 case ARGI_FIXED_TARGET: 828 case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */ 829 830 switch (DestinationType) 831 { 832 case ACPI_TYPE_LOCAL_REGION_FIELD: 833 /* 834 * Named field can always handle conversions 835 */ 836 break; 837 838 default: 839 840 /* No conversion allowed for these types */ 841 842 if (DestinationType != SourceDesc->Common.Type) 843 { 844 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 845 "Explicit operator, will store (%s) over existing type (%s)\n", 846 AcpiUtGetObjectTypeName (SourceDesc), 847 AcpiUtGetTypeName (DestinationType))); 848 Status = AE_TYPE; 849 } 850 } 851 break; 852 853 case ARGI_TARGETREF: 854 case ARGI_STORE_TARGET: 855 856 switch (DestinationType) 857 { 858 case ACPI_TYPE_INTEGER: 859 case ACPI_TYPE_BUFFER_FIELD: 860 case ACPI_TYPE_LOCAL_BANK_FIELD: 861 case ACPI_TYPE_LOCAL_INDEX_FIELD: 862 /* 863 * These types require an Integer operand. We can convert 864 * a Buffer or a String to an Integer if necessary. 865 */ 866 Status = AcpiExConvertToInteger (SourceDesc, ResultDesc, 867 ACPI_IMPLICIT_CONVERSION); 868 break; 869 870 case ACPI_TYPE_STRING: 871 /* 872 * The operand must be a String. We can convert an 873 * Integer or Buffer if necessary 874 */ 875 Status = AcpiExConvertToString (SourceDesc, ResultDesc, 876 ACPI_IMPLICIT_CONVERT_HEX); 877 break; 878 879 case ACPI_TYPE_BUFFER: 880 /* 881 * The operand must be a Buffer. We can convert an 882 * Integer or String if necessary 883 */ 884 Status = AcpiExConvertToBuffer (SourceDesc, ResultDesc); 885 break; 886 887 default: 888 889 ACPI_ERROR ((AE_INFO, 890 "Bad destination type during conversion: 0x%X", 891 DestinationType)); 892 Status = AE_AML_INTERNAL; 893 break; 894 } 895 break; 896 897 case ARGI_REFERENCE: 898 /* 899 * CreateXxxxField cases - we are storing the field object into the name 900 */ 901 break; 902 903 default: 904 905 ACPI_ERROR ((AE_INFO, 906 "Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s", 907 GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs), 908 WalkState->Opcode, AcpiUtGetTypeName (DestinationType))); 909 Status = AE_AML_INTERNAL; 910 } 911 912 /* 913 * Source-to-Target conversion semantics: 914 * 915 * If conversion to the target type cannot be performed, then simply 916 * overwrite the target with the new object and type. 917 */ 918 if (Status == AE_TYPE) 919 { 920 Status = AE_OK; 921 } 922 923 return_ACPI_STATUS (Status); 924 } 925