1 /****************************************************************************** 2 * 3 * Module Name: exfield - AML execution - FieldUnit read/write 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2021, 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 "acpi.h" 153 #include "accommon.h" 154 #include "acdispat.h" 155 #include "acinterp.h" 156 #include "amlcode.h" 157 158 159 #define _COMPONENT ACPI_EXECUTER 160 ACPI_MODULE_NAME ("exfield") 161 162 163 /* 164 * This table maps the various Attrib protocols to the byte transfer 165 * length. Used for the generic serial bus. 166 */ 167 #define ACPI_INVALID_PROTOCOL_ID 0x80 168 #define ACPI_MAX_PROTOCOL_ID 0x0F 169 170 static const UINT8 AcpiProtocolLengths[] = 171 { 172 ACPI_INVALID_PROTOCOL_ID, /* 0 - reserved */ 173 ACPI_INVALID_PROTOCOL_ID, /* 1 - reserved */ 174 0x00, /* 2 - ATTRIB_QUICK */ 175 ACPI_INVALID_PROTOCOL_ID, /* 3 - reserved */ 176 0x01, /* 4 - ATTRIB_SEND_RECEIVE */ 177 ACPI_INVALID_PROTOCOL_ID, /* 5 - reserved */ 178 0x01, /* 6 - ATTRIB_BYTE */ 179 ACPI_INVALID_PROTOCOL_ID, /* 7 - reserved */ 180 0x02, /* 8 - ATTRIB_WORD */ 181 ACPI_INVALID_PROTOCOL_ID, /* 9 - reserved */ 182 0xFF, /* A - ATTRIB_BLOCK */ 183 0xFF, /* B - ATTRIB_BYTES */ 184 0x02, /* C - ATTRIB_PROCESS_CALL */ 185 0xFF, /* D - ATTRIB_BLOCK_PROCESS_CALL */ 186 0xFF, /* E - ATTRIB_RAW_BYTES */ 187 0xFF /* F - ATTRIB_RAW_PROCESS_BYTES */ 188 }; 189 190 #define PCC_MASTER_SUBSPACE 3 191 192 /* 193 * The following macros determine a given offset is a COMD field. 194 * According to the specification, generic subspaces (types 0-2) contains a 195 * 2-byte COMD field at offset 4 and master subspaces (type 3) contains a 4-byte 196 * COMD field starting at offset 12. 197 */ 198 #define GENERIC_SUBSPACE_COMMAND(a) (4 == a || a == 5) 199 #define MASTER_SUBSPACE_COMMAND(a) (12 <= a && a <= 15) 200 201 202 /******************************************************************************* 203 * 204 * FUNCTION: AcpiExGetProtocolBufferLength 205 * 206 * PARAMETERS: ProtocolId - The type of the protocol indicated by region 207 * field access attributes 208 * ReturnLength - Where the protocol byte transfer length is 209 * returned 210 * 211 * RETURN: Status and decoded byte transfer length 212 * 213 * DESCRIPTION: This routine returns the length of the GenericSerialBus 214 * protocol bytes 215 * 216 ******************************************************************************/ 217 218 ACPI_STATUS 219 AcpiExGetProtocolBufferLength ( 220 UINT32 ProtocolId, 221 UINT32 *ReturnLength) 222 { 223 224 if ((ProtocolId > ACPI_MAX_PROTOCOL_ID) || 225 (AcpiProtocolLengths[ProtocolId] == ACPI_INVALID_PROTOCOL_ID)) 226 { 227 ACPI_ERROR ((AE_INFO, 228 "Invalid Field/AccessAs protocol ID: 0x%4.4X", ProtocolId)); 229 230 return (AE_AML_PROTOCOL); 231 } 232 233 *ReturnLength = AcpiProtocolLengths[ProtocolId]; 234 return (AE_OK); 235 } 236 237 238 /******************************************************************************* 239 * 240 * FUNCTION: AcpiExReadDataFromField 241 * 242 * PARAMETERS: WalkState - Current execution state 243 * ObjDesc - The named field 244 * RetBufferDesc - Where the return data object is stored 245 * 246 * RETURN: Status 247 * 248 * DESCRIPTION: Read from a named field. Returns either an Integer or a 249 * Buffer, depending on the size of the field and whether if a 250 * field is created by the CreateField() operator. 251 * 252 ******************************************************************************/ 253 254 ACPI_STATUS 255 AcpiExReadDataFromField ( 256 ACPI_WALK_STATE *WalkState, 257 ACPI_OPERAND_OBJECT *ObjDesc, 258 ACPI_OPERAND_OBJECT **RetBufferDesc) 259 { 260 ACPI_STATUS Status; 261 ACPI_OPERAND_OBJECT *BufferDesc; 262 void *Buffer; 263 UINT32 BufferLength; 264 265 266 ACPI_FUNCTION_TRACE_PTR (ExReadDataFromField, ObjDesc); 267 268 269 /* Parameter validation */ 270 271 if (!ObjDesc) 272 { 273 return_ACPI_STATUS (AE_AML_NO_OPERAND); 274 } 275 if (!RetBufferDesc) 276 { 277 return_ACPI_STATUS (AE_BAD_PARAMETER); 278 } 279 280 if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD) 281 { 282 /* 283 * If the BufferField arguments have not been previously evaluated, 284 * evaluate them now and save the results. 285 */ 286 if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) 287 { 288 Status = AcpiDsGetBufferFieldArguments (ObjDesc); 289 if (ACPI_FAILURE (Status)) 290 { 291 return_ACPI_STATUS (Status); 292 } 293 } 294 } 295 else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 296 (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS || 297 ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS || 298 ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI)) 299 { 300 /* SMBus, GSBus, IPMI serial */ 301 302 Status = AcpiExReadSerialBus (ObjDesc, RetBufferDesc); 303 return_ACPI_STATUS (Status); 304 } 305 306 /* 307 * Allocate a buffer for the contents of the field. 308 * 309 * If the field is larger than the current integer width, create 310 * a BUFFER to hold it. Otherwise, use an INTEGER. This allows 311 * the use of arithmetic operators on the returned value if the 312 * field size is equal or smaller than an Integer. 313 * 314 * However, all buffer fields created by CreateField operator needs to 315 * remain as a buffer to match other AML interpreter implementations. 316 * 317 * Note: Field.length is in bits. 318 */ 319 BufferLength = (ACPI_SIZE) ACPI_ROUND_BITS_UP_TO_BYTES ( 320 ObjDesc->Field.BitLength); 321 322 if (BufferLength > AcpiGbl_IntegerByteWidth || 323 (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD && 324 ObjDesc->BufferField.IsCreateField)) 325 { 326 /* Field is too large for an Integer, create a Buffer instead */ 327 328 BufferDesc = AcpiUtCreateBufferObject (BufferLength); 329 if (!BufferDesc) 330 { 331 return_ACPI_STATUS (AE_NO_MEMORY); 332 } 333 Buffer = BufferDesc->Buffer.Pointer; 334 } 335 else 336 { 337 /* Field will fit within an Integer (normal case) */ 338 339 BufferDesc = AcpiUtCreateIntegerObject ((UINT64) 0); 340 if (!BufferDesc) 341 { 342 return_ACPI_STATUS (AE_NO_MEMORY); 343 } 344 345 BufferLength = AcpiGbl_IntegerByteWidth; 346 Buffer = &BufferDesc->Integer.Value; 347 } 348 349 if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 350 (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GPIO)) 351 { 352 /* General Purpose I/O */ 353 354 Status = AcpiExReadGpio (ObjDesc, Buffer); 355 goto Exit; 356 } 357 else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 358 (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_PLATFORM_COMM)) 359 { 360 /* 361 * Reading from a PCC field unit does not require the handler because 362 * it only requires reading from the InternalPccBuffer. 363 */ 364 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 365 "PCC FieldRead bits %u\n", ObjDesc->Field.BitLength)); 366 367 memcpy (Buffer, ObjDesc->Field.RegionObj->Field.InternalPccBuffer + 368 ObjDesc->Field.BaseByteOffset, (ACPI_SIZE) ACPI_ROUND_BITS_UP_TO_BYTES ( 369 ObjDesc->Field.BitLength)); 370 371 *RetBufferDesc = BufferDesc; 372 return AE_OK; 373 } 374 375 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 376 "FieldRead [TO]: Obj %p, Type %X, Buf %p, ByteLen %X\n", 377 ObjDesc, ObjDesc->Common.Type, Buffer, BufferLength)); 378 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 379 "FieldRead [FROM]: BitLen %X, BitOff %X, ByteOff %X\n", 380 ObjDesc->CommonField.BitLength, 381 ObjDesc->CommonField.StartFieldBitOffset, 382 ObjDesc->CommonField.BaseByteOffset)); 383 384 /* Lock entire transaction if requested */ 385 386 AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 387 388 /* Read from the field */ 389 390 Status = AcpiExExtractFromField (ObjDesc, Buffer, BufferLength); 391 AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 392 393 394 Exit: 395 if (ACPI_FAILURE (Status)) 396 { 397 AcpiUtRemoveReference (BufferDesc); 398 } 399 else 400 { 401 *RetBufferDesc = BufferDesc; 402 } 403 404 return_ACPI_STATUS (Status); 405 } 406 407 408 /******************************************************************************* 409 * 410 * FUNCTION: AcpiExWriteDataToField 411 * 412 * PARAMETERS: SourceDesc - Contains data to write 413 * ObjDesc - The named field 414 * ResultDesc - Where the return value is returned, if any 415 * 416 * RETURN: Status 417 * 418 * DESCRIPTION: Write to a named field 419 * 420 ******************************************************************************/ 421 422 ACPI_STATUS 423 AcpiExWriteDataToField ( 424 ACPI_OPERAND_OBJECT *SourceDesc, 425 ACPI_OPERAND_OBJECT *ObjDesc, 426 ACPI_OPERAND_OBJECT **ResultDesc) 427 { 428 ACPI_STATUS Status; 429 UINT32 BufferLength; 430 UINT32 DataLength; 431 void *Buffer; 432 433 434 ACPI_FUNCTION_TRACE_PTR (ExWriteDataToField, ObjDesc); 435 436 437 /* Parameter validation */ 438 439 if (!SourceDesc || !ObjDesc) 440 { 441 return_ACPI_STATUS (AE_AML_NO_OPERAND); 442 } 443 444 if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD) 445 { 446 /* 447 * If the BufferField arguments have not been previously evaluated, 448 * evaluate them now and save the results. 449 */ 450 if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) 451 { 452 Status = AcpiDsGetBufferFieldArguments (ObjDesc); 453 if (ACPI_FAILURE (Status)) 454 { 455 return_ACPI_STATUS (Status); 456 } 457 } 458 } 459 else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 460 (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GPIO)) 461 { 462 /* General Purpose I/O */ 463 464 Status = AcpiExWriteGpio (SourceDesc, ObjDesc, ResultDesc); 465 return_ACPI_STATUS (Status); 466 } 467 else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 468 (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS || 469 ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS || 470 ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI)) 471 { 472 /* SMBus, GSBus, IPMI serial */ 473 474 Status = AcpiExWriteSerialBus (SourceDesc, ObjDesc, ResultDesc); 475 return_ACPI_STATUS (Status); 476 } 477 else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 478 (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_PLATFORM_COMM)) 479 { 480 /* 481 * According to the spec a write to the COMD field will invoke the 482 * region handler. Otherwise, write to the PccInternal buffer. This 483 * implementation will use the offsets specified rather than the name 484 * of the field. This is considered safer because some firmware tools 485 * are known to obfiscate named objects. 486 */ 487 DataLength = (ACPI_SIZE) ACPI_ROUND_BITS_UP_TO_BYTES ( 488 ObjDesc->Field.BitLength); 489 memcpy (ObjDesc->Field.RegionObj->Field.InternalPccBuffer + 490 ObjDesc->Field.BaseByteOffset, 491 SourceDesc->Buffer.Pointer, DataLength); 492 493 if ((ObjDesc->Field.RegionObj->Region.Address == PCC_MASTER_SUBSPACE && 494 MASTER_SUBSPACE_COMMAND (ObjDesc->Field.BaseByteOffset)) || 495 GENERIC_SUBSPACE_COMMAND (ObjDesc->Field.BaseByteOffset)) 496 { 497 /* Perform the write */ 498 499 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 500 "PCC COMD field has been written. Invoking PCC handler now.\n")); 501 502 Status = AcpiExAccessRegion ( 503 ObjDesc, 0, (UINT64 *) ObjDesc->Field.RegionObj->Field.InternalPccBuffer, 504 ACPI_WRITE); 505 return_ACPI_STATUS (Status); 506 } 507 return (AE_OK); 508 } 509 510 511 /* Get a pointer to the data to be written */ 512 513 switch (SourceDesc->Common.Type) 514 { 515 case ACPI_TYPE_INTEGER: 516 517 Buffer = &SourceDesc->Integer.Value; 518 BufferLength = sizeof (SourceDesc->Integer.Value); 519 break; 520 521 case ACPI_TYPE_BUFFER: 522 523 Buffer = SourceDesc->Buffer.Pointer; 524 BufferLength = SourceDesc->Buffer.Length; 525 break; 526 527 case ACPI_TYPE_STRING: 528 529 Buffer = SourceDesc->String.Pointer; 530 BufferLength = SourceDesc->String.Length; 531 break; 532 533 default: 534 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 535 } 536 537 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 538 "FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n", 539 SourceDesc, AcpiUtGetTypeName (SourceDesc->Common.Type), 540 SourceDesc->Common.Type, Buffer, BufferLength)); 541 542 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 543 "FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n", 544 ObjDesc, AcpiUtGetTypeName (ObjDesc->Common.Type), 545 ObjDesc->Common.Type, 546 ObjDesc->CommonField.BitLength, 547 ObjDesc->CommonField.StartFieldBitOffset, 548 ObjDesc->CommonField.BaseByteOffset)); 549 550 /* Lock entire transaction if requested */ 551 552 AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 553 554 /* Write to the field */ 555 556 Status = AcpiExInsertIntoField (ObjDesc, Buffer, BufferLength); 557 AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 558 return_ACPI_STATUS (Status); 559 } 560