1 /****************************************************************************** 2 * 3 * Module Name: aeregion - Handler for operation regions 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 "aecommon.h" 153 154 #define _COMPONENT ACPI_TOOLS 155 ACPI_MODULE_NAME ("aeregion") 156 157 158 static AE_DEBUG_REGIONS AeRegions; 159 160 161 /****************************************************************************** 162 * 163 * FUNCTION: AeRegionHandler 164 * 165 * PARAMETERS: Standard region handler parameters 166 * 167 * RETURN: Status 168 * 169 * DESCRIPTION: Test handler - Handles some dummy regions via memory that can 170 * be manipulated in Ring 3. Simulates actual reads and writes. 171 * 172 *****************************************************************************/ 173 174 ACPI_STATUS 175 AeRegionHandler ( 176 UINT32 Function, 177 ACPI_PHYSICAL_ADDRESS Address, 178 UINT32 BitWidth, 179 UINT64 *Value, 180 void *HandlerContext, 181 void *RegionContext) 182 { 183 184 ACPI_OPERAND_OBJECT *RegionObject = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, RegionContext); 185 UINT8 *Buffer = ACPI_CAST_PTR (UINT8, Value); 186 UINT8 *OldBuffer; 187 UINT8 *NewBuffer; 188 ACPI_PHYSICAL_ADDRESS BaseAddress; 189 ACPI_PHYSICAL_ADDRESS BaseAddressEnd; 190 ACPI_PHYSICAL_ADDRESS RegionAddress; 191 ACPI_PHYSICAL_ADDRESS RegionAddressEnd; 192 UINT32 Length; 193 UINT8 DataLength; 194 UINT8 *DataBuffer; 195 BOOLEAN BufferExists; 196 BOOLEAN BufferResize; 197 AE_REGION *RegionElement; 198 void *BufferValue; 199 ACPI_STATUS Status; 200 UINT32 ByteWidth; 201 UINT32 RegionLength; 202 UINT32 i; 203 UINT8 SpaceId; 204 ACPI_CONNECTION_INFO *MyContext; 205 UINT32 Value1; 206 UINT32 Value2; 207 ACPI_RESOURCE *Resource; 208 209 210 ACPI_FUNCTION_NAME (AeRegionHandler); 211 212 213 /* If the object is not a region, simply return */ 214 215 if (RegionObject->Region.Type != ACPI_TYPE_REGION) 216 { 217 return (AE_OK); 218 } 219 220 /* Check that we actually got back our context parameter */ 221 222 if (HandlerContext != &AeMyContext) 223 { 224 AcpiOsPrintf ( 225 "Region handler received incorrect context %p, should be %p\n", 226 HandlerContext, &AeMyContext); 227 } 228 229 MyContext = ACPI_CAST_PTR (ACPI_CONNECTION_INFO, HandlerContext); 230 231 /* 232 * Find the region's address space and length before searching 233 * the linked list. 234 */ 235 BaseAddress = RegionObject->Region.Address; 236 Length = RegionObject->Region.Length; 237 SpaceId = RegionObject->Region.SpaceId; 238 239 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 240 "Operation Region request on %s at 0x%X, BitWidth 0x%X, RegionLength 0x%X\n", 241 AcpiUtGetRegionName (RegionObject->Region.SpaceId), 242 (UINT32) Address, BitWidth, (UINT32) Length)); 243 244 /* 245 * Region support can be disabled with the -do option. 246 * We use this to support dynamically loaded tables where we pass a valid 247 * address to the AML. 248 */ 249 if (AcpiGbl_DbOpt_NoRegionSupport) 250 { 251 BufferValue = ACPI_TO_POINTER (Address); 252 ByteWidth = (BitWidth / 8); 253 254 if (BitWidth % 8) 255 { 256 ByteWidth += 1; 257 } 258 goto DoFunction; 259 } 260 261 switch (SpaceId) 262 { 263 case ACPI_ADR_SPACE_SYSTEM_IO: 264 /* 265 * For I/O space, exercise the port validation 266 * Note: ReadPort currently always returns all ones, length=BitLength 267 */ 268 switch (Function & ACPI_IO_MASK) 269 { 270 case ACPI_READ: 271 272 if (BitWidth == 64) 273 { 274 /* Split the 64-bit request into two 32-bit requests */ 275 276 Status = AcpiHwReadPort (Address, &Value1, 32); 277 ACPI_CHECK_OK (AcpiHwReadPort, Status); 278 Status = AcpiHwReadPort (Address+4, &Value2, 32); 279 ACPI_CHECK_OK (AcpiHwReadPort, Status); 280 281 *Value = Value1 | ((UINT64) Value2 << 32); 282 } 283 else 284 { 285 Status = AcpiHwReadPort (Address, &Value1, BitWidth); 286 ACPI_CHECK_OK (AcpiHwReadPort, Status); 287 *Value = (UINT64) Value1; 288 } 289 break; 290 291 case ACPI_WRITE: 292 293 if (BitWidth == 64) 294 { 295 /* Split the 64-bit request into two 32-bit requests */ 296 297 Status = AcpiHwWritePort (Address, ACPI_LODWORD (*Value), 32); 298 ACPI_CHECK_OK (AcpiHwWritePort, Status); 299 Status = AcpiHwWritePort (Address+4, ACPI_HIDWORD (*Value), 32); 300 ACPI_CHECK_OK (AcpiHwWritePort, Status); 301 } 302 else 303 { 304 Status = AcpiHwWritePort (Address, (UINT32) *Value, BitWidth); 305 ACPI_CHECK_OK (AcpiHwWritePort, Status); 306 } 307 break; 308 309 default: 310 311 Status = AE_BAD_PARAMETER; 312 break; 313 } 314 315 if (ACPI_FAILURE (Status)) 316 { 317 return (Status); 318 } 319 320 /* Now go ahead and simulate the hardware */ 321 break; 322 323 /* 324 * SMBus and GenericSerialBus support the various bidirectional 325 * protocols. 326 */ 327 case ACPI_ADR_SPACE_SMBUS: 328 case ACPI_ADR_SPACE_GSBUS: /* ACPI 5.0 */ 329 330 Status = AcpiExGetProtocolBufferLength ((Function >> 16), &Length); 331 if (ACPI_FAILURE (Status)) 332 { 333 AcpiOsPrintf ("AcpiExec: Invalid SMbus/GSbus protocol ID: 0x%X\n", 334 (Function >> 16)); 335 return (Status); 336 } 337 338 /* Adjust for fixed SMBus buffer size */ 339 340 if ((SpaceId == ACPI_ADR_SPACE_SMBUS) && 341 (Length > ACPI_SMBUS_DATA_SIZE)) 342 { 343 Length = ACPI_SMBUS_DATA_SIZE; /* SMBus buffer is fixed-length */ 344 } 345 346 if (AcpiGbl_DisplayRegionAccess) 347 { 348 AcpiOsPrintf ("AcpiExec: %s " 349 "%s: Attr %X Addr %.4X BaseAddr %.4X Length %.2X BitWidth %X BufLen %X\n", 350 AcpiUtGetRegionName (SpaceId), 351 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 352 (UINT32) (Function >> 16), 353 (UINT32) Address, (UINT32) BaseAddress, 354 Length, BitWidth, Buffer[1]); 355 356 /* GenericSerialBus has a Connection() parameter */ 357 358 if ((SpaceId == ACPI_ADR_SPACE_GSBUS) && MyContext) 359 { 360 Status = AcpiBufferToResource (MyContext->Connection, 361 MyContext->Length, &Resource); 362 if (ACPI_SUCCESS (Status)) 363 { 364 ACPI_FREE (Resource); 365 } 366 367 AcpiOsPrintf (" [AccessLength %.2X Connection %p]", 368 MyContext->AccessLength, MyContext->Connection); 369 } 370 371 AcpiOsPrintf ("\n"); 372 } 373 374 DataBuffer = &Buffer[2]; 375 DataLength = (UINT8) Length; 376 377 /* Setup the return buffer. Note: ASLTS depends on these fill values */ 378 379 if (Length == ACPI_MAX_GSBUS_DATA_SIZE) 380 { 381 DataLength = 0x20; /* For ASLTS only */ 382 } 383 384 for (i = 0; i < Length; i++) 385 { 386 DataBuffer[i] = (UINT8) (0xA0 + i); 387 } 388 389 Buffer[0] = 0; /* Return Status, OK */ 390 Buffer[1] = DataLength; /* Length of valid data */ 391 return (AE_OK); 392 393 case ACPI_ADR_SPACE_IPMI: /* ACPI 4.0 */ 394 395 if (AcpiGbl_DisplayRegionAccess) 396 { 397 AcpiOsPrintf ("AcpiExec: IPMI " 398 "%s: Attr %X Addr %.4X BaseAddr %.4X Len %.2X Width %X BufLen %X\n", 399 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 400 (UINT32) (Function >> 16), (UINT32) Address, (UINT32) BaseAddress, 401 Length, BitWidth, Buffer[1]); 402 } 403 404 /* 405 * Regardless of a READ or WRITE, this handler is passed a 66-byte 406 * buffer in which to return the IPMI status/length/data. 407 * 408 * Return some example data to show use of the bidirectional buffer 409 */ 410 Buffer[0] = 0; /* Status byte */ 411 Buffer[1] = ACPI_IPMI_DATA_SIZE; /* Return buffer data length */ 412 Buffer[2] = 0; /* Completion code */ 413 Buffer[3] = 0; /* Reserved */ 414 415 /* 416 * Fill the 66-byte buffer with the return data. 417 * Note: ASLTS depends on these fill values. 418 */ 419 for (i = 4; i < ACPI_IPMI_BUFFER_SIZE; i++) 420 { 421 Buffer[i] = (UINT8) (i); 422 } 423 return (AE_OK); 424 425 /* 426 * GPIO has some special semantics: 427 * 1) Address is the pin number index into the Connection() pin list 428 * 2) BitWidth is the actual number of bits (pins) defined by the field 429 */ 430 case ACPI_ADR_SPACE_GPIO: /* ACPI 5.0 */ 431 432 if (AcpiGbl_DisplayRegionAccess) 433 { 434 AcpiOsPrintf ("AcpiExec: GPIO " 435 "%s: Address %.4X Length %X BitWidth %X Conn %p\n", 436 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 437 (UINT32) Address, Length, BitWidth, MyContext->Connection); 438 } 439 440 /* Now perform the "normal" SystemMemory handling, for AcpiExec only */ 441 break; 442 443 /* 444 * PCC operation region will write the entire subspace's data and expect 445 * a response from the hardware. For acpiexec, we'll fill the buffer with 446 * default values. Note: ASLTS will depend on these values. 447 */ 448 case ACPI_ADR_SPACE_PLATFORM_COMM: /* ACPI 6.3 */ 449 if (AcpiGbl_DisplayRegionAccess) 450 { 451 AcpiOsPrintf ("AcpiExec: PCC Write : Addr %.4X Width %X\n", 452 (UINT32) Address, BitWidth); 453 } 454 for (i = 0; i < Length; ++i) 455 { 456 Buffer[i] = (UINT8) i; 457 } 458 return (AE_OK); 459 460 default: 461 break; 462 } 463 464 /* 465 * Search through the linked list for this region's buffer 466 */ 467 BufferExists = FALSE; 468 BufferResize = FALSE; 469 RegionElement = AeRegions.RegionList; 470 471 if (AeRegions.NumberOfRegions) 472 { 473 BaseAddressEnd = BaseAddress + Length - 1; 474 while (!BufferExists && RegionElement) 475 { 476 RegionAddress = RegionElement->Address; 477 RegionAddressEnd = RegionElement->Address + RegionElement->Length - 1; 478 RegionLength = RegionElement->Length; 479 480 /* 481 * Overlapping Region Support 482 * 483 * While searching through the region buffer list, determine if an 484 * overlap exists between the requested buffer space and the current 485 * RegionElement space. If there is an overlap then replace the old 486 * buffer with a new buffer of increased size before continuing to 487 * do the read or write 488 */ 489 if (RegionElement->SpaceId != SpaceId || 490 BaseAddressEnd < RegionAddress || 491 BaseAddress > RegionAddressEnd) 492 { 493 /* 494 * Requested buffer is outside of the current RegionElement 495 * bounds 496 */ 497 RegionElement = RegionElement->NextRegion; 498 } 499 else 500 { 501 /* 502 * Some amount of buffer space sharing exists. There are 4 cases 503 * to consider: 504 * 505 * 1. Right overlap 506 * 2. Left overlap 507 * 3. Left and right overlap 508 * 4. Fully contained - no resizing required 509 */ 510 BufferExists = TRUE; 511 512 if ((BaseAddress >= RegionAddress) && 513 (BaseAddress <= RegionAddressEnd) && 514 (BaseAddressEnd > RegionAddressEnd)) 515 { 516 /* Right overlap */ 517 518 RegionElement->Length = (UINT32) (BaseAddress - 519 RegionAddress + Length); 520 BufferResize = TRUE; 521 } 522 523 else if ((BaseAddressEnd >= RegionAddress) && 524 (BaseAddressEnd <= RegionAddressEnd) && 525 (BaseAddress < RegionAddress)) 526 { 527 /* Left overlap */ 528 529 RegionElement->Address = BaseAddress; 530 RegionElement->Length = (UINT32) (RegionAddress - 531 BaseAddress + RegionElement->Length); 532 BufferResize = TRUE; 533 } 534 535 else if ((BaseAddress < RegionAddress) && 536 (BaseAddressEnd > RegionAddressEnd)) 537 { 538 /* Left and right overlap */ 539 540 RegionElement->Address = BaseAddress; 541 RegionElement->Length = Length; 542 BufferResize = TRUE; 543 } 544 545 /* 546 * only remaining case is fully contained for which we don't 547 * need to do anything 548 */ 549 if (BufferResize) 550 { 551 NewBuffer = AcpiOsAllocate (RegionElement->Length); 552 if (!NewBuffer) 553 { 554 return (AE_NO_MEMORY); 555 } 556 557 OldBuffer = RegionElement->Buffer; 558 RegionElement->Buffer = NewBuffer; 559 NewBuffer = NULL; 560 561 /* Initialize the region with the default fill value */ 562 563 memset (RegionElement->Buffer, 564 AcpiGbl_RegionFillValue, RegionElement->Length); 565 566 /* 567 * Get BufferValue to point (within the new buffer) to the 568 * base address of the old buffer 569 */ 570 BufferValue = (UINT8 *) RegionElement->Buffer + 571 (UINT64) RegionAddress - 572 (UINT64) RegionElement->Address; 573 574 /* 575 * Copy the old buffer to its same location within the new 576 * buffer 577 */ 578 memcpy (BufferValue, OldBuffer, RegionLength); 579 AcpiOsFree (OldBuffer); 580 } 581 } 582 } 583 } 584 585 /* 586 * If the Region buffer does not exist, create it now 587 */ 588 if (!BufferExists) 589 { 590 /* Do the memory allocations first */ 591 592 RegionElement = AcpiOsAllocate (sizeof (AE_REGION)); 593 if (!RegionElement) 594 { 595 return (AE_NO_MEMORY); 596 } 597 598 RegionElement->Buffer = AcpiOsAllocate (Length); 599 if (!RegionElement->Buffer) 600 { 601 AcpiOsFree (RegionElement); 602 return (AE_NO_MEMORY); 603 } 604 605 /* Initialize the region with the default fill value */ 606 607 memset (RegionElement->Buffer, AcpiGbl_RegionFillValue, Length); 608 609 RegionElement->Address = BaseAddress; 610 RegionElement->Length = Length; 611 RegionElement->SpaceId = SpaceId; 612 RegionElement->NextRegion = NULL; 613 614 /* 615 * Increment the number of regions and put this one 616 * at the head of the list as it will probably get accessed 617 * more often anyway. 618 */ 619 AeRegions.NumberOfRegions += 1; 620 621 if (AeRegions.RegionList) 622 { 623 RegionElement->NextRegion = AeRegions.RegionList; 624 } 625 626 AeRegions.RegionList = RegionElement; 627 } 628 629 /* Calculate the size of the memory copy */ 630 631 ByteWidth = (BitWidth / 8); 632 if (BitWidth % 8) 633 { 634 ByteWidth += 1; 635 } 636 637 /* 638 * The buffer exists and is pointed to by RegionElement. 639 * We now need to verify the request is valid and perform the operation. 640 * 641 * NOTE: RegionElement->Length is in bytes, therefore it we compare against 642 * ByteWidth (see above) 643 */ 644 if ((RegionObject->Region.SpaceId != ACPI_ADR_SPACE_GPIO) && 645 ((UINT64) Address + ByteWidth) > 646 ((UINT64)(RegionElement->Address) + RegionElement->Length)) 647 { 648 ACPI_WARNING ((AE_INFO, 649 "Request on [%4.4s] is beyond region limit " 650 "Req-0x%X+0x%X, Base=0x%X, Len-0x%X", 651 (RegionObject->Region.Node)->Name.Ascii, (UINT32) Address, 652 ByteWidth, (UINT32)(RegionElement->Address), 653 RegionElement->Length)); 654 655 return (AE_AML_REGION_LIMIT); 656 } 657 658 /* 659 * Get BufferValue to point to the "address" in the buffer 660 */ 661 BufferValue = ((UINT8 *) RegionElement->Buffer + 662 ((UINT64) Address - (UINT64) RegionElement->Address)); 663 664 DoFunction: 665 /* 666 * Perform a read or write to the buffer space 667 */ 668 switch (Function) 669 { 670 case ACPI_READ: 671 /* 672 * Set the pointer Value to whatever is in the buffer 673 */ 674 memcpy (Value, BufferValue, ByteWidth); 675 break; 676 677 case ACPI_WRITE: 678 /* 679 * Write the contents of Value to the buffer 680 */ 681 memcpy (BufferValue, Value, ByteWidth); 682 break; 683 684 default: 685 686 return (AE_BAD_PARAMETER); 687 } 688 689 if (AcpiGbl_DisplayRegionAccess) 690 { 691 switch (SpaceId) 692 { 693 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 694 695 AcpiOsPrintf ("AcpiExec: SystemMemory " 696 "%s: Val %.8X Addr %.4X BitWidth %X [REGION: BaseAddr %.4X Len %.2X]\n", 697 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 698 (UINT32) *Value, (UINT32) Address, BitWidth, (UINT32) BaseAddress, Length); 699 break; 700 701 case ACPI_ADR_SPACE_GSBUS: 702 703 AcpiOsPrintf ("AcpiExec: GenericSerialBus\n"); 704 break; 705 706 case ACPI_ADR_SPACE_GPIO: /* ACPI 5.0 */ 707 708 /* This space is required to always be ByteAcc */ 709 710 Status = AcpiBufferToResource (MyContext->Connection, 711 MyContext->Length, &Resource); 712 713 AcpiOsPrintf ("AcpiExec: GeneralPurposeIo " 714 "%s: %.8X Addr %.4X BaseAddr %.4X Length %.2X " 715 "BitWidth %X AccLen %.2X Conn %p\n", 716 (Function & ACPI_IO_MASK) ? "Write" : "Read ", (UINT32) *Value, 717 (UINT32) Address, (UINT32) BaseAddress, Length, BitWidth, 718 MyContext->AccessLength, MyContext->Connection); 719 if (ACPI_SUCCESS (Status)) 720 { 721 ACPI_FREE (Resource); 722 } 723 break; 724 725 default: 726 727 AcpiOsPrintf ("AcpiExec: Region access on SpaceId %2.2X\n", SpaceId); 728 break; 729 } 730 } 731 732 return (AE_OK); 733 } 734