| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: exconvrt - Object conversion routines |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2016, 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 | #include "acpi.h" |
| 45 | #include "accommon.h" |
| 46 | #include "acinterp.h" |
| 47 | #include "amlcode.h" |
| 48 | |
| 49 | |
| 50 | #define _COMPONENT ACPI_EXECUTER |
| 51 | ACPI_MODULE_NAME ("exconvrt" ) |
| 52 | |
| 53 | /* Local prototypes */ |
| 54 | |
| 55 | static UINT32 |
| 56 | AcpiExConvertToAscii ( |
| 57 | UINT64 Integer, |
| 58 | UINT16 Base, |
| 59 | UINT8 *String, |
| 60 | UINT8 MaxLength); |
| 61 | |
| 62 | |
| 63 | /******************************************************************************* |
| 64 | * |
| 65 | * FUNCTION: AcpiExConvertToInteger |
| 66 | * |
| 67 | * PARAMETERS: ObjDesc - Object to be converted. Must be an |
| 68 | * Integer, Buffer, or String |
| 69 | * ResultDesc - Where the new Integer object is returned |
| 70 | * Flags - Used for string conversion |
| 71 | * |
| 72 | * RETURN: Status |
| 73 | * |
| 74 | * DESCRIPTION: Convert an ACPI Object to an integer. |
| 75 | * |
| 76 | ******************************************************************************/ |
| 77 | |
| 78 | ACPI_STATUS |
| 79 | AcpiExConvertToInteger ( |
| 80 | ACPI_OPERAND_OBJECT *ObjDesc, |
| 81 | ACPI_OPERAND_OBJECT **ResultDesc, |
| 82 | UINT32 Flags) |
| 83 | { |
| 84 | ACPI_OPERAND_OBJECT *ReturnDesc; |
| 85 | UINT8 *Pointer; |
| 86 | UINT64 Result; |
| 87 | UINT32 i; |
| 88 | UINT32 Count; |
| 89 | ACPI_STATUS Status; |
| 90 | |
| 91 | |
| 92 | ACPI_FUNCTION_TRACE_PTR (ExConvertToInteger, ObjDesc); |
| 93 | |
| 94 | |
| 95 | switch (ObjDesc->Common.Type) |
| 96 | { |
| 97 | case ACPI_TYPE_INTEGER: |
| 98 | |
| 99 | /* No conversion necessary */ |
| 100 | |
| 101 | *ResultDesc = ObjDesc; |
| 102 | return_ACPI_STATUS (AE_OK); |
| 103 | |
| 104 | case ACPI_TYPE_BUFFER: |
| 105 | case ACPI_TYPE_STRING: |
| 106 | |
| 107 | /* Note: Takes advantage of common buffer/string fields */ |
| 108 | |
| 109 | Pointer = ObjDesc->Buffer.Pointer; |
| 110 | Count = ObjDesc->Buffer.Length; |
| 111 | break; |
| 112 | |
| 113 | default: |
| 114 | |
| 115 | return_ACPI_STATUS (AE_TYPE); |
| 116 | } |
| 117 | |
| 118 | /* |
| 119 | * Convert the buffer/string to an integer. Note that both buffers and |
| 120 | * strings are treated as raw data - we don't convert ascii to hex for |
| 121 | * strings. |
| 122 | * |
| 123 | * There are two terminating conditions for the loop: |
| 124 | * 1) The size of an integer has been reached, or |
| 125 | * 2) The end of the buffer or string has been reached |
| 126 | */ |
| 127 | Result = 0; |
| 128 | |
| 129 | /* String conversion is different than Buffer conversion */ |
| 130 | |
| 131 | switch (ObjDesc->Common.Type) |
| 132 | { |
| 133 | case ACPI_TYPE_STRING: |
| 134 | /* |
| 135 | * Convert string to an integer - for most cases, the string must be |
| 136 | * hexadecimal as per the ACPI specification. The only exception (as |
| 137 | * of ACPI 3.0) is that the ToInteger() operator allows both decimal |
| 138 | * and hexadecimal strings (hex prefixed with "0x"). |
| 139 | */ |
| 140 | Status = AcpiUtStrtoul64 (ACPI_CAST_PTR (char, Pointer), |
| 141 | (AcpiGbl_IntegerByteWidth | Flags), &Result); |
| 142 | if (ACPI_FAILURE (Status)) |
| 143 | { |
| 144 | return_ACPI_STATUS (Status); |
| 145 | } |
| 146 | break; |
| 147 | |
| 148 | case ACPI_TYPE_BUFFER: |
| 149 | |
| 150 | /* Check for zero-length buffer */ |
| 151 | |
| 152 | if (!Count) |
| 153 | { |
| 154 | return_ACPI_STATUS (AE_AML_BUFFER_LIMIT); |
| 155 | } |
| 156 | |
| 157 | /* Transfer no more than an integer's worth of data */ |
| 158 | |
| 159 | if (Count > AcpiGbl_IntegerByteWidth) |
| 160 | { |
| 161 | Count = AcpiGbl_IntegerByteWidth; |
| 162 | } |
| 163 | |
| 164 | /* |
| 165 | * Convert buffer to an integer - we simply grab enough raw data |
| 166 | * from the buffer to fill an integer |
| 167 | */ |
| 168 | for (i = 0; i < Count; i++) |
| 169 | { |
| 170 | /* |
| 171 | * Get next byte and shift it into the Result. |
| 172 | * Little endian is used, meaning that the first byte of the buffer |
| 173 | * is the LSB of the integer |
| 174 | */ |
| 175 | Result |= (((UINT64) Pointer[i]) << (i * 8)); |
| 176 | } |
| 177 | break; |
| 178 | |
| 179 | default: |
| 180 | |
| 181 | /* No other types can get here */ |
| 182 | |
| 183 | break; |
| 184 | } |
| 185 | |
| 186 | /* Create a new integer */ |
| 187 | |
| 188 | ReturnDesc = AcpiUtCreateIntegerObject (Result); |
| 189 | if (!ReturnDesc) |
| 190 | { |
| 191 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 192 | } |
| 193 | |
| 194 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n" , |
| 195 | ACPI_FORMAT_UINT64 (Result))); |
| 196 | |
| 197 | /* Save the Result */ |
| 198 | |
| 199 | (void) AcpiExTruncateFor32bitTable (ReturnDesc); |
| 200 | *ResultDesc = ReturnDesc; |
| 201 | return_ACPI_STATUS (AE_OK); |
| 202 | } |
| 203 | |
| 204 | |
| 205 | /******************************************************************************* |
| 206 | * |
| 207 | * FUNCTION: AcpiExConvertToBuffer |
| 208 | * |
| 209 | * PARAMETERS: ObjDesc - Object to be converted. Must be an |
| 210 | * Integer, Buffer, or String |
| 211 | * ResultDesc - Where the new buffer object is returned |
| 212 | * |
| 213 | * RETURN: Status |
| 214 | * |
| 215 | * DESCRIPTION: Convert an ACPI Object to a Buffer |
| 216 | * |
| 217 | ******************************************************************************/ |
| 218 | |
| 219 | ACPI_STATUS |
| 220 | AcpiExConvertToBuffer ( |
| 221 | ACPI_OPERAND_OBJECT *ObjDesc, |
| 222 | ACPI_OPERAND_OBJECT **ResultDesc) |
| 223 | { |
| 224 | ACPI_OPERAND_OBJECT *ReturnDesc; |
| 225 | UINT8 *NewBuf; |
| 226 | |
| 227 | |
| 228 | ACPI_FUNCTION_TRACE_PTR (ExConvertToBuffer, ObjDesc); |
| 229 | |
| 230 | |
| 231 | switch (ObjDesc->Common.Type) |
| 232 | { |
| 233 | case ACPI_TYPE_BUFFER: |
| 234 | |
| 235 | /* No conversion necessary */ |
| 236 | |
| 237 | *ResultDesc = ObjDesc; |
| 238 | return_ACPI_STATUS (AE_OK); |
| 239 | |
| 240 | |
| 241 | case ACPI_TYPE_INTEGER: |
| 242 | /* |
| 243 | * Create a new Buffer object. |
| 244 | * Need enough space for one integer |
| 245 | */ |
| 246 | ReturnDesc = AcpiUtCreateBufferObject (AcpiGbl_IntegerByteWidth); |
| 247 | if (!ReturnDesc) |
| 248 | { |
| 249 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 250 | } |
| 251 | |
| 252 | /* Copy the integer to the buffer, LSB first */ |
| 253 | |
| 254 | NewBuf = ReturnDesc->Buffer.Pointer; |
| 255 | memcpy (NewBuf, &ObjDesc->Integer.Value, AcpiGbl_IntegerByteWidth); |
| 256 | break; |
| 257 | |
| 258 | case ACPI_TYPE_STRING: |
| 259 | /* |
| 260 | * Create a new Buffer object |
| 261 | * Size will be the string length |
| 262 | * |
| 263 | * NOTE: Add one to the string length to include the null terminator. |
| 264 | * The ACPI spec is unclear on this subject, but there is existing |
| 265 | * ASL/AML code that depends on the null being transferred to the new |
| 266 | * buffer. |
| 267 | */ |
| 268 | ReturnDesc = AcpiUtCreateBufferObject ((ACPI_SIZE) |
| 269 | ObjDesc->String.Length + 1); |
| 270 | if (!ReturnDesc) |
| 271 | { |
| 272 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 273 | } |
| 274 | |
| 275 | /* Copy the string to the buffer */ |
| 276 | |
| 277 | NewBuf = ReturnDesc->Buffer.Pointer; |
| 278 | strncpy ((char *) NewBuf, (char *) ObjDesc->String.Pointer, |
| 279 | ObjDesc->String.Length); |
| 280 | break; |
| 281 | |
| 282 | default: |
| 283 | |
| 284 | return_ACPI_STATUS (AE_TYPE); |
| 285 | } |
| 286 | |
| 287 | /* Mark buffer initialized */ |
| 288 | |
| 289 | ReturnDesc->Common.Flags |= AOPOBJ_DATA_VALID; |
| 290 | *ResultDesc = ReturnDesc; |
| 291 | return_ACPI_STATUS (AE_OK); |
| 292 | } |
| 293 | |
| 294 | |
| 295 | /******************************************************************************* |
| 296 | * |
| 297 | * FUNCTION: AcpiExConvertToAscii |
| 298 | * |
| 299 | * PARAMETERS: Integer - Value to be converted |
| 300 | * Base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX |
| 301 | * String - Where the string is returned |
| 302 | * DataWidth - Size of data item to be converted, in bytes |
| 303 | * |
| 304 | * RETURN: Actual string length |
| 305 | * |
| 306 | * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string |
| 307 | * |
| 308 | ******************************************************************************/ |
| 309 | |
| 310 | static UINT32 |
| 311 | AcpiExConvertToAscii ( |
| 312 | UINT64 Integer, |
| 313 | UINT16 Base, |
| 314 | UINT8 *String, |
| 315 | UINT8 DataWidth) |
| 316 | { |
| 317 | UINT64 Digit; |
| 318 | UINT32 i; |
| 319 | UINT32 j; |
| 320 | UINT32 k = 0; |
| 321 | UINT32 HexLength; |
| 322 | UINT32 DecimalLength; |
| 323 | UINT32 Remainder; |
| 324 | BOOLEAN SupressZeros; |
| 325 | |
| 326 | |
| 327 | ACPI_FUNCTION_ENTRY (); |
| 328 | |
| 329 | |
| 330 | switch (Base) |
| 331 | { |
| 332 | case 10: |
| 333 | |
| 334 | /* Setup max length for the decimal number */ |
| 335 | |
| 336 | switch (DataWidth) |
| 337 | { |
| 338 | case 1: |
| 339 | |
| 340 | DecimalLength = ACPI_MAX8_DECIMAL_DIGITS; |
| 341 | break; |
| 342 | |
| 343 | case 4: |
| 344 | |
| 345 | DecimalLength = ACPI_MAX32_DECIMAL_DIGITS; |
| 346 | break; |
| 347 | |
| 348 | case 8: |
| 349 | default: |
| 350 | |
| 351 | DecimalLength = ACPI_MAX64_DECIMAL_DIGITS; |
| 352 | break; |
| 353 | } |
| 354 | |
| 355 | SupressZeros = TRUE; /* No leading zeros */ |
| 356 | Remainder = 0; |
| 357 | |
| 358 | for (i = DecimalLength; i > 0; i--) |
| 359 | { |
| 360 | /* Divide by nth factor of 10 */ |
| 361 | |
| 362 | Digit = Integer; |
| 363 | for (j = 0; j < i; j++) |
| 364 | { |
| 365 | (void) AcpiUtShortDivide (Digit, 10, &Digit, &Remainder); |
| 366 | } |
| 367 | |
| 368 | /* Handle leading zeros */ |
| 369 | |
| 370 | if (Remainder != 0) |
| 371 | { |
| 372 | SupressZeros = FALSE; |
| 373 | } |
| 374 | |
| 375 | if (!SupressZeros) |
| 376 | { |
| 377 | String[k] = (UINT8) (ACPI_ASCII_ZERO + Remainder); |
| 378 | k++; |
| 379 | } |
| 380 | } |
| 381 | break; |
| 382 | |
| 383 | case 16: |
| 384 | |
| 385 | /* HexLength: 2 ascii hex chars per data byte */ |
| 386 | |
| 387 | HexLength = ACPI_MUL_2 (DataWidth); |
| 388 | for (i = 0, j = (HexLength-1); i < HexLength; i++, j--) |
| 389 | { |
| 390 | /* Get one hex digit, most significant digits first */ |
| 391 | |
| 392 | String[k] = (UINT8) |
| 393 | AcpiUtHexToAsciiChar (Integer, ACPI_MUL_4 (j)); |
| 394 | k++; |
| 395 | } |
| 396 | break; |
| 397 | |
| 398 | default: |
| 399 | return (0); |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * Since leading zeros are suppressed, we must check for the case where |
| 404 | * the integer equals 0 |
| 405 | * |
| 406 | * Finally, null terminate the string and return the length |
| 407 | */ |
| 408 | if (!k) |
| 409 | { |
| 410 | String [0] = ACPI_ASCII_ZERO; |
| 411 | k = 1; |
| 412 | } |
| 413 | |
| 414 | String [k] = 0; |
| 415 | return ((UINT32) k); |
| 416 | } |
| 417 | |
| 418 | |
| 419 | /******************************************************************************* |
| 420 | * |
| 421 | * FUNCTION: AcpiExConvertToString |
| 422 | * |
| 423 | * PARAMETERS: ObjDesc - Object to be converted. Must be an |
| 424 | * Integer, Buffer, or String |
| 425 | * ResultDesc - Where the string object is returned |
| 426 | * Type - String flags (base and conversion type) |
| 427 | * |
| 428 | * RETURN: Status |
| 429 | * |
| 430 | * DESCRIPTION: Convert an ACPI Object to a string |
| 431 | * |
| 432 | ******************************************************************************/ |
| 433 | |
| 434 | ACPI_STATUS |
| 435 | AcpiExConvertToString ( |
| 436 | ACPI_OPERAND_OBJECT *ObjDesc, |
| 437 | ACPI_OPERAND_OBJECT **ResultDesc, |
| 438 | UINT32 Type) |
| 439 | { |
| 440 | ACPI_OPERAND_OBJECT *ReturnDesc; |
| 441 | UINT8 *NewBuf; |
| 442 | UINT32 i; |
| 443 | UINT32 StringLength = 0; |
| 444 | UINT16 Base = 16; |
| 445 | UINT8 Separator = ','; |
| 446 | |
| 447 | |
| 448 | ACPI_FUNCTION_TRACE_PTR (ExConvertToString, ObjDesc); |
| 449 | |
| 450 | |
| 451 | switch (ObjDesc->Common.Type) |
| 452 | { |
| 453 | case ACPI_TYPE_STRING: |
| 454 | |
| 455 | /* No conversion necessary */ |
| 456 | |
| 457 | *ResultDesc = ObjDesc; |
| 458 | return_ACPI_STATUS (AE_OK); |
| 459 | |
| 460 | case ACPI_TYPE_INTEGER: |
| 461 | |
| 462 | switch (Type) |
| 463 | { |
| 464 | case ACPI_EXPLICIT_CONVERT_DECIMAL: |
| 465 | |
| 466 | /* Make room for maximum decimal number */ |
| 467 | |
| 468 | StringLength = ACPI_MAX_DECIMAL_DIGITS; |
| 469 | Base = 10; |
| 470 | break; |
| 471 | |
| 472 | default: |
| 473 | |
| 474 | /* Two hex string characters for each integer byte */ |
| 475 | |
| 476 | StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth); |
| 477 | break; |
| 478 | } |
| 479 | |
| 480 | /* |
| 481 | * Create a new String |
| 482 | * Need enough space for one ASCII integer (plus null terminator) |
| 483 | */ |
| 484 | ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength); |
| 485 | if (!ReturnDesc) |
| 486 | { |
| 487 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 488 | } |
| 489 | |
| 490 | NewBuf = ReturnDesc->Buffer.Pointer; |
| 491 | |
| 492 | /* Convert integer to string */ |
| 493 | |
| 494 | StringLength = AcpiExConvertToAscii ( |
| 495 | ObjDesc->Integer.Value, Base, NewBuf, AcpiGbl_IntegerByteWidth); |
| 496 | |
| 497 | /* Null terminate at the correct place */ |
| 498 | |
| 499 | ReturnDesc->String.Length = StringLength; |
| 500 | NewBuf [StringLength] = 0; |
| 501 | break; |
| 502 | |
| 503 | case ACPI_TYPE_BUFFER: |
| 504 | |
| 505 | /* Setup string length, base, and separator */ |
| 506 | |
| 507 | switch (Type) |
| 508 | { |
| 509 | case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by ToDecimalString */ |
| 510 | /* |
| 511 | * From ACPI: "If Data is a buffer, it is converted to a string of |
| 512 | * decimal values separated by commas." |
| 513 | */ |
| 514 | Base = 10; |
| 515 | |
| 516 | /* |
| 517 | * Calculate the final string length. Individual string values |
| 518 | * are variable length (include separator for each) |
| 519 | */ |
| 520 | for (i = 0; i < ObjDesc->Buffer.Length; i++) |
| 521 | { |
| 522 | if (ObjDesc->Buffer.Pointer[i] >= 100) |
| 523 | { |
| 524 | StringLength += 4; |
| 525 | } |
| 526 | else if (ObjDesc->Buffer.Pointer[i] >= 10) |
| 527 | { |
| 528 | StringLength += 3; |
| 529 | } |
| 530 | else |
| 531 | { |
| 532 | StringLength += 2; |
| 533 | } |
| 534 | } |
| 535 | break; |
| 536 | |
| 537 | case ACPI_IMPLICIT_CONVERT_HEX: |
| 538 | /* |
| 539 | * From the ACPI spec: |
| 540 | *"The entire contents of the buffer are converted to a string of |
| 541 | * two-character hexadecimal numbers, each separated by a space." |
| 542 | */ |
| 543 | Separator = ' '; |
| 544 | StringLength = (ObjDesc->Buffer.Length * 3); |
| 545 | break; |
| 546 | |
| 547 | case ACPI_EXPLICIT_CONVERT_HEX: /* Used by ToHexString */ |
| 548 | /* |
| 549 | * From ACPI: "If Data is a buffer, it is converted to a string of |
| 550 | * hexadecimal values separated by commas." |
| 551 | */ |
| 552 | StringLength = (ObjDesc->Buffer.Length * 3); |
| 553 | break; |
| 554 | |
| 555 | default: |
| 556 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 557 | } |
| 558 | |
| 559 | /* |
| 560 | * Create a new string object and string buffer |
| 561 | * (-1 because of extra separator included in StringLength from above) |
| 562 | * Allow creation of zero-length strings from zero-length buffers. |
| 563 | */ |
| 564 | if (StringLength) |
| 565 | { |
| 566 | StringLength--; |
| 567 | } |
| 568 | |
| 569 | ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength); |
| 570 | if (!ReturnDesc) |
| 571 | { |
| 572 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 573 | } |
| 574 | |
| 575 | NewBuf = ReturnDesc->Buffer.Pointer; |
| 576 | |
| 577 | /* |
| 578 | * Convert buffer bytes to hex or decimal values |
| 579 | * (separated by commas or spaces) |
| 580 | */ |
| 581 | for (i = 0; i < ObjDesc->Buffer.Length; i++) |
| 582 | { |
| 583 | NewBuf += AcpiExConvertToAscii ( |
| 584 | (UINT64) ObjDesc->Buffer.Pointer[i], Base, NewBuf, 1); |
| 585 | *NewBuf++ = Separator; /* each separated by a comma or space */ |
| 586 | } |
| 587 | |
| 588 | /* |
| 589 | * Null terminate the string |
| 590 | * (overwrites final comma/space from above) |
| 591 | */ |
| 592 | if (ObjDesc->Buffer.Length) |
| 593 | { |
| 594 | NewBuf--; |
| 595 | } |
| 596 | *NewBuf = 0; |
| 597 | break; |
| 598 | |
| 599 | default: |
| 600 | |
| 601 | return_ACPI_STATUS (AE_TYPE); |
| 602 | } |
| 603 | |
| 604 | *ResultDesc = ReturnDesc; |
| 605 | return_ACPI_STATUS (AE_OK); |
| 606 | } |
| 607 | |
| 608 | |
| 609 | /******************************************************************************* |
| 610 | * |
| 611 | * FUNCTION: AcpiExConvertToTargetType |
| 612 | * |
| 613 | * PARAMETERS: DestinationType - Current type of the destination |
| 614 | * SourceDesc - Source object to be converted. |
| 615 | * ResultDesc - Where the converted object is returned |
| 616 | * WalkState - Current method state |
| 617 | * |
| 618 | * RETURN: Status |
| 619 | * |
| 620 | * DESCRIPTION: Implements "implicit conversion" rules for storing an object. |
| 621 | * |
| 622 | ******************************************************************************/ |
| 623 | |
| 624 | ACPI_STATUS |
| 625 | AcpiExConvertToTargetType ( |
| 626 | ACPI_OBJECT_TYPE DestinationType, |
| 627 | ACPI_OPERAND_OBJECT *SourceDesc, |
| 628 | ACPI_OPERAND_OBJECT **ResultDesc, |
| 629 | ACPI_WALK_STATE *WalkState) |
| 630 | { |
| 631 | ACPI_STATUS Status = AE_OK; |
| 632 | |
| 633 | |
| 634 | ACPI_FUNCTION_TRACE (ExConvertToTargetType); |
| 635 | |
| 636 | |
| 637 | /* Default behavior */ |
| 638 | |
| 639 | *ResultDesc = SourceDesc; |
| 640 | |
| 641 | /* |
| 642 | * If required by the target, |
| 643 | * perform implicit conversion on the source before we store it. |
| 644 | */ |
| 645 | switch (GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs)) |
| 646 | { |
| 647 | case ARGI_SIMPLE_TARGET: |
| 648 | case ARGI_FIXED_TARGET: |
| 649 | case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */ |
| 650 | |
| 651 | switch (DestinationType) |
| 652 | { |
| 653 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 654 | /* |
| 655 | * Named field can always handle conversions |
| 656 | */ |
| 657 | break; |
| 658 | |
| 659 | default: |
| 660 | |
| 661 | /* No conversion allowed for these types */ |
| 662 | |
| 663 | if (DestinationType != SourceDesc->Common.Type) |
| 664 | { |
| 665 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| 666 | "Explicit operator, will store (%s) over existing type (%s)\n" , |
| 667 | AcpiUtGetObjectTypeName (SourceDesc), |
| 668 | AcpiUtGetTypeName (DestinationType))); |
| 669 | Status = AE_TYPE; |
| 670 | } |
| 671 | } |
| 672 | break; |
| 673 | |
| 674 | case ARGI_TARGETREF: |
| 675 | case ARGI_STORE_TARGET: |
| 676 | |
| 677 | switch (DestinationType) |
| 678 | { |
| 679 | case ACPI_TYPE_INTEGER: |
| 680 | case ACPI_TYPE_BUFFER_FIELD: |
| 681 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 682 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 683 | /* |
| 684 | * These types require an Integer operand. We can convert |
| 685 | * a Buffer or a String to an Integer if necessary. |
| 686 | */ |
| 687 | Status = AcpiExConvertToInteger (SourceDesc, ResultDesc, |
| 688 | ACPI_STRTOUL_BASE16); |
| 689 | break; |
| 690 | |
| 691 | case ACPI_TYPE_STRING: |
| 692 | /* |
| 693 | * The operand must be a String. We can convert an |
| 694 | * Integer or Buffer if necessary |
| 695 | */ |
| 696 | Status = AcpiExConvertToString (SourceDesc, ResultDesc, |
| 697 | ACPI_IMPLICIT_CONVERT_HEX); |
| 698 | break; |
| 699 | |
| 700 | case ACPI_TYPE_BUFFER: |
| 701 | /* |
| 702 | * The operand must be a Buffer. We can convert an |
| 703 | * Integer or String if necessary |
| 704 | */ |
| 705 | Status = AcpiExConvertToBuffer (SourceDesc, ResultDesc); |
| 706 | break; |
| 707 | |
| 708 | default: |
| 709 | |
| 710 | ACPI_ERROR ((AE_INFO, |
| 711 | "Bad destination type during conversion: 0x%X" , |
| 712 | DestinationType)); |
| 713 | Status = AE_AML_INTERNAL; |
| 714 | break; |
| 715 | } |
| 716 | break; |
| 717 | |
| 718 | case ARGI_REFERENCE: |
| 719 | /* |
| 720 | * CreateXxxxField cases - we are storing the field object into the name |
| 721 | */ |
| 722 | break; |
| 723 | |
| 724 | default: |
| 725 | |
| 726 | ACPI_ERROR ((AE_INFO, |
| 727 | "Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s" , |
| 728 | GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs), |
| 729 | WalkState->Opcode, AcpiUtGetTypeName (DestinationType))); |
| 730 | Status = AE_AML_INTERNAL; |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * Source-to-Target conversion semantics: |
| 735 | * |
| 736 | * If conversion to the target type cannot be performed, then simply |
| 737 | * overwrite the target with the new object and type. |
| 738 | */ |
| 739 | if (Status == AE_TYPE) |
| 740 | { |
| 741 | Status = AE_OK; |
| 742 | } |
| 743 | |
| 744 | return_ACPI_STATUS (Status); |
| 745 | } |
| 746 | |