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 char Uuid[ACPI_PRM_INPUT_BUFFER_SIZE + 1]; 209 210 211 ACPI_FUNCTION_NAME (AeRegionHandler); 212 213 214 /* If the object is not a region, simply return */ 215 216 if (RegionObject->Region.Type != ACPI_TYPE_REGION) 217 { 218 return (AE_OK); 219 } 220 221 /* Check that we actually got back our context parameter */ 222 223 if (HandlerContext != &AeMyContext) 224 { 225 AcpiOsPrintf ( 226 "Region handler received incorrect context %p, should be %p\n", 227 HandlerContext, &AeMyContext); 228 } 229 230 MyContext = ACPI_CAST_PTR (ACPI_CONNECTION_INFO, HandlerContext); 231 232 /* 233 * Find the region's address space and length before searching 234 * the linked list. 235 */ 236 BaseAddress = RegionObject->Region.Address; 237 Length = RegionObject->Region.Length; 238 SpaceId = RegionObject->Region.SpaceId; 239 240 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 241 "Operation Region request on %s at 0x%X, BitWidth 0x%X, RegionLength 0x%X\n", 242 AcpiUtGetRegionName (RegionObject->Region.SpaceId), 243 (UINT32) Address, BitWidth, (UINT32) Length)); 244 245 /* 246 * Region support can be disabled with the -do option. 247 * We use this to support dynamically loaded tables where we pass a valid 248 * address to the AML. 249 */ 250 if (AcpiGbl_DbOpt_NoRegionSupport) 251 { 252 BufferValue = ACPI_TO_POINTER (Address); 253 ByteWidth = (BitWidth / 8); 254 255 if (BitWidth % 8) 256 { 257 ByteWidth += 1; 258 } 259 goto DoFunction; 260 } 261 262 switch (SpaceId) 263 { 264 case ACPI_ADR_SPACE_SYSTEM_IO: 265 /* 266 * For I/O space, exercise the port validation 267 * Note: ReadPort currently always returns all ones, length=BitLength 268 */ 269 switch (Function & ACPI_IO_MASK) 270 { 271 case ACPI_READ: 272 273 if (BitWidth == 64) 274 { 275 /* Split the 64-bit request into two 32-bit requests */ 276 277 Status = AcpiHwReadPort (Address, &Value1, 32); 278 ACPI_CHECK_OK (AcpiHwReadPort, Status); 279 Status = AcpiHwReadPort (Address+4, &Value2, 32); 280 ACPI_CHECK_OK (AcpiHwReadPort, Status); 281 282 *Value = Value1 | ((UINT64) Value2 << 32); 283 } 284 else 285 { 286 Status = AcpiHwReadPort (Address, &Value1, BitWidth); 287 ACPI_CHECK_OK (AcpiHwReadPort, Status); 288 *Value = (UINT64) Value1; 289 } 290 break; 291 292 case ACPI_WRITE: 293 294 if (BitWidth == 64) 295 { 296 /* Split the 64-bit request into two 32-bit requests */ 297 298 Status = AcpiHwWritePort (Address, ACPI_LODWORD (*Value), 32); 299 ACPI_CHECK_OK (AcpiHwWritePort, Status); 300 Status = AcpiHwWritePort (Address+4, ACPI_HIDWORD (*Value), 32); 301 ACPI_CHECK_OK (AcpiHwWritePort, Status); 302 } 303 else 304 { 305 Status = AcpiHwWritePort (Address, (UINT32) *Value, BitWidth); 306 ACPI_CHECK_OK (AcpiHwWritePort, Status); 307 } 308 break; 309 310 default: 311 312 Status = AE_BAD_PARAMETER; 313 break; 314 } 315 316 if (ACPI_FAILURE (Status)) 317 { 318 return (Status); 319 } 320 321 /* Now go ahead and simulate the hardware */ 322 break; 323 324 /* 325 * SMBus and GenericSerialBus support the various bidirectional 326 * protocols. 327 */ 328 case ACPI_ADR_SPACE_SMBUS: 329 case ACPI_ADR_SPACE_GSBUS: /* ACPI 5.0 */ 330 331 Status = AcpiExGetProtocolBufferLength ((Function >> 16), &Length); 332 if (ACPI_FAILURE (Status)) 333 { 334 AcpiOsPrintf ("AcpiExec: Invalid SMbus/GSbus protocol ID: 0x%X\n", 335 (Function >> 16)); 336 return (Status); 337 } 338 339 /* Adjust for fixed SMBus buffer size */ 340 341 if ((SpaceId == ACPI_ADR_SPACE_SMBUS) && 342 (Length > ACPI_SMBUS_DATA_SIZE)) 343 { 344 Length = ACPI_SMBUS_DATA_SIZE; /* SMBus buffer is fixed-length */ 345 } 346 347 if (AcpiGbl_DisplayRegionAccess) 348 { 349 AcpiOsPrintf ("AcpiExec: %s " 350 "%s: Attr %X Addr %.4X BaseAddr %.4X Length %.2X BitWidth %X BufLen %X\n", 351 AcpiUtGetRegionName (SpaceId), 352 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 353 (UINT32) (Function >> 16), 354 (UINT32) Address, (UINT32) BaseAddress, 355 Length, BitWidth, Buffer[1]); 356 357 /* GenericSerialBus has a Connection() parameter */ 358 359 if ((SpaceId == ACPI_ADR_SPACE_GSBUS) && MyContext) 360 { 361 Status = AcpiBufferToResource (MyContext->Connection, 362 MyContext->Length, &Resource); 363 if (ACPI_SUCCESS (Status)) 364 { 365 ACPI_FREE (Resource); 366 } 367 368 AcpiOsPrintf (" [AccessLength %.2X Connection %p]", 369 MyContext->AccessLength, MyContext->Connection); 370 } 371 372 AcpiOsPrintf ("\n"); 373 } 374 375 DataBuffer = &Buffer[2]; 376 DataLength = (UINT8) Length; 377 378 /* Setup the return buffer. Note: ASLTS depends on these fill values */ 379 380 if (Length == ACPI_MAX_GSBUS_DATA_SIZE) 381 { 382 DataLength = 0x20; /* For ASLTS only */ 383 } 384 385 for (i = 0; i < Length; i++) 386 { 387 DataBuffer[i] = (UINT8) (0xA0 + i); 388 } 389 390 Buffer[0] = 0; /* Return Status, OK */ 391 Buffer[1] = DataLength; /* Length of valid data */ 392 return (AE_OK); 393 394 case ACPI_ADR_SPACE_IPMI: /* ACPI 4.0 */ 395 396 if (AcpiGbl_DisplayRegionAccess) 397 { 398 AcpiOsPrintf ("AcpiExec: IPMI " 399 "%s: Attr %X Addr %.4X BaseAddr %.4X Len %.2X Width %X BufLen %X\n", 400 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 401 (UINT32) (Function >> 16), (UINT32) Address, (UINT32) BaseAddress, 402 Length, BitWidth, Buffer[1]); 403 } 404 405 /* 406 * Regardless of a READ or WRITE, this handler is passed a 66-byte 407 * buffer in which to return the IPMI status/length/data. 408 * 409 * Return some example data to show use of the bidirectional buffer 410 */ 411 Buffer[0] = 0; /* Status byte */ 412 Buffer[1] = ACPI_IPMI_DATA_SIZE; /* Return buffer data length */ 413 Buffer[2] = 0; /* Completion code */ 414 Buffer[3] = 0; /* Reserved */ 415 416 /* 417 * Fill the 66-byte buffer with the return data. 418 * Note: ASLTS depends on these fill values. 419 */ 420 for (i = 4; i < ACPI_IPMI_BUFFER_SIZE; i++) 421 { 422 Buffer[i] = (UINT8) (i); 423 } 424 return (AE_OK); 425 426 /* 427 * GPIO has some special semantics: 428 * 1) Address is the pin number index into the Connection() pin list 429 * 2) BitWidth is the actual number of bits (pins) defined by the field 430 */ 431 case ACPI_ADR_SPACE_GPIO: /* ACPI 5.0 */ 432 433 if (AcpiGbl_DisplayRegionAccess) 434 { 435 AcpiOsPrintf ("AcpiExec: GPIO " 436 "%s: Address %.4X Length %X BitWidth %X Conn %p\n", 437 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 438 (UINT32) Address, Length, BitWidth, MyContext->Connection); 439 } 440 441 /* Now perform the "normal" SystemMemory handling, for AcpiExec only */ 442 break; 443 444 /* 445 * PCC operation region will write the entire subspace's data and expect 446 * a response from the hardware. For acpiexec, we'll fill the buffer with 447 * default values. Note: ASLTS will depend on these values. 448 */ 449 case ACPI_ADR_SPACE_PLATFORM_COMM: /* ACPI 6.3 */ 450 451 if (AcpiGbl_DisplayRegionAccess) 452 { 453 AcpiOsPrintf ("AcpiExec: PCC Write : Addr %.4X Width %X\n", 454 (UINT32) Address, BitWidth); 455 } 456 for (i = 0; i < Length; ++i) 457 { 458 Buffer[i] = (UINT8) i; 459 } 460 return (AE_OK); 461 462 case ACPI_ADR_SPACE_PLATFORM_RT: 463 464 AcpiOsPrintf ("Acpiexec: PRM %s invoked\n", 465 (Function & ACPI_IO_MASK) ? "Write" : "Read "); 466 467 if ((Function & ACPI_IO_MASK) == ACPI_WRITE) 468 { 469 AcpiUtConvertUuidToString((char *) Buffer + 10, Uuid); 470 AcpiOsPrintf ("Mode: %u GUID: %s\n", Buffer[0], Uuid); 471 } 472 473 /* Unpack the input buffer and print the contents for debug */ 474 475 break; 476 477 default: 478 break; 479 } 480 481 /* 482 * Search through the linked list for this region's buffer 483 */ 484 BufferExists = FALSE; 485 BufferResize = FALSE; 486 RegionElement = AeRegions.RegionList; 487 488 if (AeRegions.NumberOfRegions) 489 { 490 BaseAddressEnd = BaseAddress + Length - 1; 491 while (!BufferExists && RegionElement) 492 { 493 RegionAddress = RegionElement->Address; 494 RegionAddressEnd = RegionElement->Address + RegionElement->Length - 1; 495 RegionLength = RegionElement->Length; 496 497 /* 498 * Overlapping Region Support 499 * 500 * While searching through the region buffer list, determine if an 501 * overlap exists between the requested buffer space and the current 502 * RegionElement space. If there is an overlap then replace the old 503 * buffer with a new buffer of increased size before continuing to 504 * do the read or write 505 */ 506 if (RegionElement->SpaceId != SpaceId || 507 BaseAddressEnd < RegionAddress || 508 BaseAddress > RegionAddressEnd) 509 { 510 /* 511 * Requested buffer is outside of the current RegionElement 512 * bounds 513 */ 514 RegionElement = RegionElement->NextRegion; 515 } 516 else 517 { 518 /* 519 * Some amount of buffer space sharing exists. There are 4 cases 520 * to consider: 521 * 522 * 1. Right overlap 523 * 2. Left overlap 524 * 3. Left and right overlap 525 * 4. Fully contained - no resizing required 526 */ 527 BufferExists = TRUE; 528 529 if ((BaseAddress >= RegionAddress) && 530 (BaseAddress <= RegionAddressEnd) && 531 (BaseAddressEnd > RegionAddressEnd)) 532 { 533 /* Right overlap */ 534 535 RegionElement->Length = (UINT32) (BaseAddress - 536 RegionAddress + Length); 537 BufferResize = TRUE; 538 } 539 540 else if ((BaseAddressEnd >= RegionAddress) && 541 (BaseAddressEnd <= RegionAddressEnd) && 542 (BaseAddress < RegionAddress)) 543 { 544 /* Left overlap */ 545 546 RegionElement->Address = BaseAddress; 547 RegionElement->Length = (UINT32) (RegionAddress - 548 BaseAddress + RegionElement->Length); 549 BufferResize = TRUE; 550 } 551 552 else if ((BaseAddress < RegionAddress) && 553 (BaseAddressEnd > RegionAddressEnd)) 554 { 555 /* Left and right overlap */ 556 557 RegionElement->Address = BaseAddress; 558 RegionElement->Length = Length; 559 BufferResize = TRUE; 560 } 561 562 /* 563 * only remaining case is fully contained for which we don't 564 * need to do anything 565 */ 566 if (BufferResize) 567 { 568 NewBuffer = AcpiOsAllocate (RegionElement->Length); 569 if (!NewBuffer) 570 { 571 return (AE_NO_MEMORY); 572 } 573 574 OldBuffer = RegionElement->Buffer; 575 RegionElement->Buffer = NewBuffer; 576 NewBuffer = NULL; 577 578 /* Initialize the region with the default fill value */ 579 580 memset (RegionElement->Buffer, 581 AcpiGbl_RegionFillValue, RegionElement->Length); 582 583 /* 584 * Get BufferValue to point (within the new buffer) to the 585 * base address of the old buffer 586 */ 587 BufferValue = (UINT8 *) RegionElement->Buffer + 588 (UINT64) RegionAddress - 589 (UINT64) RegionElement->Address; 590 591 /* 592 * Copy the old buffer to its same location within the new 593 * buffer 594 */ 595 memcpy (BufferValue, OldBuffer, RegionLength); 596 AcpiOsFree (OldBuffer); 597 } 598 } 599 } 600 } 601 602 /* 603 * If the Region buffer does not exist, create it now 604 */ 605 if (!BufferExists) 606 { 607 /* Do the memory allocations first */ 608 609 RegionElement = AcpiOsAllocate (sizeof (AE_REGION)); 610 if (!RegionElement) 611 { 612 return (AE_NO_MEMORY); 613 } 614 615 RegionElement->Buffer = AcpiOsAllocate (Length); 616 if (!RegionElement->Buffer) 617 { 618 AcpiOsFree (RegionElement); 619 return (AE_NO_MEMORY); 620 } 621 622 /* Initialize the region with the default fill value */ 623 624 memset (RegionElement->Buffer, AcpiGbl_RegionFillValue, Length); 625 626 RegionElement->Address = BaseAddress; 627 RegionElement->Length = Length; 628 RegionElement->SpaceId = SpaceId; 629 RegionElement->NextRegion = NULL; 630 631 /* 632 * Increment the number of regions and put this one 633 * at the head of the list as it will probably get accessed 634 * more often anyway. 635 */ 636 AeRegions.NumberOfRegions += 1; 637 638 if (AeRegions.RegionList) 639 { 640 RegionElement->NextRegion = AeRegions.RegionList; 641 } 642 643 AeRegions.RegionList = RegionElement; 644 } 645 646 /* Calculate the size of the memory copy */ 647 648 ByteWidth = (BitWidth / 8); 649 if (BitWidth % 8) 650 { 651 ByteWidth += 1; 652 } 653 654 /* 655 * The buffer exists and is pointed to by RegionElement. 656 * We now need to verify the request is valid and perform the operation. 657 * 658 * NOTE: RegionElement->Length is in bytes, therefore it we compare against 659 * ByteWidth (see above) 660 */ 661 if ((RegionObject->Region.SpaceId != ACPI_ADR_SPACE_GPIO) && 662 ((UINT64) Address + ByteWidth) > 663 ((UINT64)(RegionElement->Address) + RegionElement->Length)) 664 { 665 ACPI_WARNING ((AE_INFO, 666 "Request on [%4.4s] is beyond region limit " 667 "Req-0x%X+0x%X, Base=0x%X, Len-0x%X", 668 (RegionObject->Region.Node)->Name.Ascii, (UINT32) Address, 669 ByteWidth, (UINT32)(RegionElement->Address), 670 RegionElement->Length)); 671 672 return (AE_AML_REGION_LIMIT); 673 } 674 675 /* 676 * Get BufferValue to point to the "address" in the buffer 677 */ 678 BufferValue = ((UINT8 *) RegionElement->Buffer + 679 ((UINT64) Address - (UINT64) RegionElement->Address)); 680 681 DoFunction: 682 /* 683 * Perform a read or write to the buffer space 684 */ 685 switch (Function) 686 { 687 case ACPI_READ: 688 /* 689 * Set the pointer Value to whatever is in the buffer 690 */ 691 memcpy (Value, BufferValue, ByteWidth); 692 break; 693 694 case ACPI_WRITE: 695 /* 696 * Write the contents of Value to the buffer 697 */ 698 memcpy (BufferValue, Value, ByteWidth); 699 break; 700 701 default: 702 703 return (AE_BAD_PARAMETER); 704 } 705 706 if (AcpiGbl_DisplayRegionAccess) 707 { 708 switch (SpaceId) 709 { 710 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 711 712 AcpiOsPrintf ("AcpiExec: SystemMemory " 713 "%s: Val %.8X Addr %.4X BitWidth %X [REGION: BaseAddr %.4X Len %.2X]\n", 714 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 715 (UINT32) *Value, (UINT32) Address, BitWidth, (UINT32) BaseAddress, Length); 716 break; 717 718 case ACPI_ADR_SPACE_GSBUS: 719 720 AcpiOsPrintf ("AcpiExec: GenericSerialBus\n"); 721 break; 722 723 case ACPI_ADR_SPACE_GPIO: /* ACPI 5.0 */ 724 725 /* This space is required to always be ByteAcc */ 726 727 Status = AcpiBufferToResource (MyContext->Connection, 728 MyContext->Length, &Resource); 729 730 AcpiOsPrintf ("AcpiExec: GeneralPurposeIo " 731 "%s: %.8X Addr %.4X BaseAddr %.4X Length %.2X " 732 "BitWidth %X AccLen %.2X Conn %p\n", 733 (Function & ACPI_IO_MASK) ? "Write" : "Read ", (UINT32) *Value, 734 (UINT32) Address, (UINT32) BaseAddress, Length, BitWidth, 735 MyContext->AccessLength, MyContext->Connection); 736 if (ACPI_SUCCESS (Status)) 737 { 738 ACPI_FREE (Resource); 739 } 740 break; 741 742 default: 743 744 AcpiOsPrintf ("AcpiExec: Region access on SpaceId %2.2X\n", SpaceId); 745 break; 746 } 747 } 748 749 return (AE_OK); 750 } 751