1 /****************************************************************************** 2 * 3 * Module Name: aeregion - Operation region support for acpiexec 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2015, 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 "aecommon.h" 45 46 #define _COMPONENT ACPI_TOOLS 47 ACPI_MODULE_NAME ("aeregion") 48 49 50 /* Local prototypes */ 51 52 static ACPI_STATUS 53 AeRegionInit ( 54 ACPI_HANDLE RegionHandle, 55 UINT32 Function, 56 void *HandlerContext, 57 void **RegionContext); 58 59 static ACPI_STATUS 60 AeInstallEcHandler ( 61 ACPI_HANDLE ObjHandle, 62 UINT32 Level, 63 void *Context, 64 void **ReturnValue); 65 66 static ACPI_STATUS 67 AeInstallPciHandler ( 68 ACPI_HANDLE ObjHandle, 69 UINT32 Level, 70 void *Context, 71 void **ReturnValue); 72 73 74 static AE_DEBUG_REGIONS AeRegions; 75 BOOLEAN AcpiGbl_DisplayRegionAccess = FALSE; 76 ACPI_CONNECTION_INFO AeMyContext; 77 78 79 /* 80 * We will override some of the default region handlers, especially 81 * the SystemMemory handler, which must be implemented locally. 82 * These handlers are installed "early" - before any _REG methods 83 * are executed - since they are special in the sense that the ACPI spec 84 * declares that they must "always be available". Cannot override the 85 * DataTable region handler either -- needed for test execution. 86 * 87 * NOTE: The local region handler will simulate access to these address 88 * spaces by creating a memory buffer behind each operation region. 89 */ 90 static ACPI_ADR_SPACE_TYPE DefaultSpaceIdList[] = 91 { 92 ACPI_ADR_SPACE_SYSTEM_MEMORY, 93 ACPI_ADR_SPACE_SYSTEM_IO, 94 ACPI_ADR_SPACE_PCI_CONFIG, 95 ACPI_ADR_SPACE_EC 96 }; 97 98 /* 99 * We will install handlers for some of the various address space IDs. 100 * Test one user-defined address space (used by aslts). 101 */ 102 #define ACPI_ADR_SPACE_USER_DEFINED1 0x80 103 #define ACPI_ADR_SPACE_USER_DEFINED2 0xE4 104 105 static ACPI_ADR_SPACE_TYPE SpaceIdList[] = 106 { 107 ACPI_ADR_SPACE_SMBUS, 108 ACPI_ADR_SPACE_CMOS, 109 ACPI_ADR_SPACE_PCI_BAR_TARGET, 110 ACPI_ADR_SPACE_IPMI, 111 ACPI_ADR_SPACE_GPIO, 112 ACPI_ADR_SPACE_GSBUS, 113 ACPI_ADR_SPACE_FIXED_HARDWARE, 114 ACPI_ADR_SPACE_USER_DEFINED1, 115 ACPI_ADR_SPACE_USER_DEFINED2 116 }; 117 118 119 /****************************************************************************** 120 * 121 * FUNCTION: AeRegionInit 122 * 123 * PARAMETERS: Region init handler 124 * 125 * RETURN: Status 126 * 127 * DESCRIPTION: Opregion init function. 128 * 129 *****************************************************************************/ 130 131 static ACPI_STATUS 132 AeRegionInit ( 133 ACPI_HANDLE RegionHandle, 134 UINT32 Function, 135 void *HandlerContext, 136 void **RegionContext) 137 { 138 139 if (Function == ACPI_REGION_DEACTIVATE) 140 { 141 *RegionContext = NULL; 142 } 143 else 144 { 145 *RegionContext = RegionHandle; 146 } 147 148 return (AE_OK); 149 } 150 151 152 void 153 AeInstallRegionHandlers ( 154 void) 155 { 156 UINT32 i; 157 ACPI_STATUS Status; 158 159 /* 160 * Install handlers for some of the "device driver" address spaces 161 * such as SMBus, etc. 162 */ 163 for (i = 0; i < ACPI_ARRAY_LENGTH (SpaceIdList); i++) 164 { 165 /* Install handler at the root object */ 166 167 Status = AcpiInstallAddressSpaceHandler (ACPI_ROOT_OBJECT, 168 SpaceIdList[i], AeRegionHandler, 169 AeRegionInit, &AeMyContext); 170 if (ACPI_FAILURE (Status)) 171 { 172 ACPI_EXCEPTION ((AE_INFO, Status, 173 "Could not install an OpRegion handler for %s space(%u)", 174 AcpiUtGetRegionName((UINT8) SpaceIdList[i]), SpaceIdList[i])); 175 return; 176 } 177 } 178 } 179 180 181 void 182 AeOverrideRegionHandlers ( 183 void) 184 { 185 UINT32 i; 186 ACPI_STATUS Status; 187 188 /* 189 * Install handlers that will override the default handlers for some of 190 * the space IDs. 191 */ 192 for (i = 0; i < ACPI_ARRAY_LENGTH (DefaultSpaceIdList); i++) 193 { 194 /* Install handler at the root object */ 195 196 Status = AcpiInstallAddressSpaceHandler (ACPI_ROOT_OBJECT, 197 DefaultSpaceIdList[i], AeRegionHandler, 198 AeRegionInit, &AeMyContext); 199 if (ACPI_FAILURE (Status)) 200 { 201 ACPI_EXCEPTION ((AE_INFO, Status, 202 "Could not install a default OpRegion handler for %s space(%u)", 203 AcpiUtGetRegionName ((UINT8) DefaultSpaceIdList[i]), 204 DefaultSpaceIdList[i])); 205 return; 206 } 207 } 208 } 209 210 211 /******************************************************************************* 212 * 213 * FUNCTION: AeInstallDeviceHandlers, 214 * AeInstallEcHandler, 215 * AeInstallPciHandler 216 * 217 * PARAMETERS: ACPI_WALK_NAMESPACE callback 218 * 219 * RETURN: Status 220 * 221 * DESCRIPTION: Walk entire namespace, install a handler for every EC 222 * and PCI device found. 223 * 224 ******************************************************************************/ 225 226 static ACPI_STATUS 227 AeInstallEcHandler ( 228 ACPI_HANDLE ObjHandle, 229 UINT32 Level, 230 void *Context, 231 void **ReturnValue) 232 { 233 ACPI_STATUS Status; 234 235 236 /* Install the handler for this EC device */ 237 238 Status = AcpiInstallAddressSpaceHandler (ObjHandle, ACPI_ADR_SPACE_EC, 239 AeRegionHandler, AeRegionInit, &AeMyContext); 240 if (ACPI_FAILURE (Status)) 241 { 242 ACPI_EXCEPTION ((AE_INFO, Status, 243 "Could not install an OpRegion handler for EC device (%p)", 244 ObjHandle)); 245 } 246 247 return (Status); 248 } 249 250 251 static ACPI_STATUS 252 AeInstallPciHandler ( 253 ACPI_HANDLE ObjHandle, 254 UINT32 Level, 255 void *Context, 256 void **ReturnValue) 257 { 258 ACPI_STATUS Status; 259 260 261 /* Install memory and I/O handlers for the PCI device */ 262 263 Status = AcpiInstallAddressSpaceHandler (ObjHandle, ACPI_ADR_SPACE_SYSTEM_IO, 264 AeRegionHandler, AeRegionInit, &AeMyContext); 265 if (ACPI_FAILURE (Status)) 266 { 267 ACPI_EXCEPTION ((AE_INFO, Status, 268 "Could not install an OpRegion handler for PCI device (%p)", 269 ObjHandle)); 270 } 271 272 Status = AcpiInstallAddressSpaceHandler (ObjHandle, ACPI_ADR_SPACE_SYSTEM_MEMORY, 273 AeRegionHandler, AeRegionInit, &AeMyContext); 274 if (ACPI_FAILURE (Status)) 275 { 276 ACPI_EXCEPTION ((AE_INFO, Status, 277 "Could not install an OpRegion handler for PCI device (%p)", 278 ObjHandle)); 279 } 280 281 return (AE_CTRL_TERMINATE); 282 } 283 284 285 ACPI_STATUS 286 AeInstallDeviceHandlers ( 287 void) 288 { 289 290 /* Find all Embedded Controller devices */ 291 292 AcpiGetDevices ("PNP0C09", AeInstallEcHandler, NULL, NULL); 293 294 /* Install a PCI handler */ 295 296 AcpiGetDevices ("PNP0A08", AeInstallPciHandler, NULL, NULL); 297 return (AE_OK); 298 } 299 300 301 /****************************************************************************** 302 * 303 * FUNCTION: AeRegionHandler 304 * 305 * PARAMETERS: Standard region handler parameters 306 * 307 * RETURN: Status 308 * 309 * DESCRIPTION: Test handler - Handles some dummy regions via memory that can 310 * be manipulated in Ring 3. Simulates actual reads and writes. 311 * 312 *****************************************************************************/ 313 314 ACPI_STATUS 315 AeRegionHandler ( 316 UINT32 Function, 317 ACPI_PHYSICAL_ADDRESS Address, 318 UINT32 BitWidth, 319 UINT64 *Value, 320 void *HandlerContext, 321 void *RegionContext) 322 { 323 324 ACPI_OPERAND_OBJECT *RegionObject = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, RegionContext); 325 UINT8 *Buffer = ACPI_CAST_PTR (UINT8, Value); 326 UINT8 *OldBuffer; 327 UINT8 *NewBuffer; 328 ACPI_PHYSICAL_ADDRESS BaseAddress; 329 ACPI_PHYSICAL_ADDRESS BaseAddressEnd; 330 ACPI_PHYSICAL_ADDRESS RegionAddress; 331 ACPI_PHYSICAL_ADDRESS RegionAddressEnd; 332 ACPI_SIZE Length; 333 BOOLEAN BufferExists; 334 BOOLEAN BufferResize; 335 AE_REGION *RegionElement; 336 void *BufferValue; 337 ACPI_STATUS Status; 338 UINT32 ByteWidth; 339 UINT32 RegionLength; 340 UINT32 i; 341 UINT8 SpaceId; 342 ACPI_CONNECTION_INFO *MyContext; 343 UINT32 Value1; 344 UINT32 Value2; 345 ACPI_RESOURCE *Resource; 346 347 348 ACPI_FUNCTION_NAME (AeRegionHandler); 349 350 /* 351 * If the object is not a region, simply return 352 */ 353 if (RegionObject->Region.Type != ACPI_TYPE_REGION) 354 { 355 return (AE_OK); 356 } 357 358 /* Check that we actually got back our context parameter */ 359 360 if (HandlerContext != &AeMyContext) 361 { 362 printf ("Region handler received incorrect context %p, should be %p\n", 363 HandlerContext, &AeMyContext); 364 } 365 366 MyContext = ACPI_CAST_PTR (ACPI_CONNECTION_INFO, HandlerContext); 367 368 /* 369 * Find the region's address space and length before searching 370 * the linked list. 371 */ 372 BaseAddress = RegionObject->Region.Address; 373 Length = (ACPI_SIZE) RegionObject->Region.Length; 374 SpaceId = RegionObject->Region.SpaceId; 375 376 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Operation Region request on %s at 0x%X\n", 377 AcpiUtGetRegionName (RegionObject->Region.SpaceId), 378 (UINT32) Address)); 379 380 /* 381 * Region support can be disabled with the -do option. 382 * We use this to support dynamically loaded tables where we pass a valid 383 * address to the AML. 384 */ 385 if (AcpiGbl_DbOpt_NoRegionSupport) 386 { 387 BufferValue = ACPI_TO_POINTER (Address); 388 ByteWidth = (BitWidth / 8); 389 390 if (BitWidth % 8) 391 { 392 ByteWidth += 1; 393 } 394 goto DoFunction; 395 } 396 397 switch (SpaceId) 398 { 399 case ACPI_ADR_SPACE_SYSTEM_IO: 400 /* 401 * For I/O space, exercise the port validation 402 * Note: ReadPort currently always returns all ones, length=BitLength 403 */ 404 switch (Function & ACPI_IO_MASK) 405 { 406 case ACPI_READ: 407 408 if (BitWidth == 64) 409 { 410 /* Split the 64-bit request into two 32-bit requests */ 411 412 Status = AcpiHwReadPort (Address, &Value1, 32); 413 AE_CHECK_OK (AcpiHwReadPort, Status); 414 Status = AcpiHwReadPort (Address+4, &Value2, 32); 415 AE_CHECK_OK (AcpiHwReadPort, Status); 416 417 *Value = Value1 | ((UINT64) Value2 << 32); 418 } 419 else 420 { 421 Status = AcpiHwReadPort (Address, &Value1, BitWidth); 422 AE_CHECK_OK (AcpiHwReadPort, Status); 423 *Value = (UINT64) Value1; 424 } 425 break; 426 427 case ACPI_WRITE: 428 429 if (BitWidth == 64) 430 { 431 /* Split the 64-bit request into two 32-bit requests */ 432 433 Status = AcpiHwWritePort (Address, ACPI_LODWORD (*Value), 32); 434 AE_CHECK_OK (AcpiHwWritePort, Status); 435 Status = AcpiHwWritePort (Address+4, ACPI_HIDWORD (*Value), 32); 436 AE_CHECK_OK (AcpiHwWritePort, Status); 437 } 438 else 439 { 440 Status = AcpiHwWritePort (Address, (UINT32) *Value, BitWidth); 441 AE_CHECK_OK (AcpiHwWritePort, Status); 442 } 443 break; 444 445 default: 446 447 Status = AE_BAD_PARAMETER; 448 break; 449 } 450 451 if (ACPI_FAILURE (Status)) 452 { 453 return (Status); 454 } 455 456 /* Now go ahead and simulate the hardware */ 457 break; 458 459 /* 460 * SMBus and GenericSerialBus support the various bidirectional 461 * protocols. 462 */ 463 case ACPI_ADR_SPACE_SMBUS: 464 case ACPI_ADR_SPACE_GSBUS: /* ACPI 5.0 */ 465 466 Length = 0; 467 468 switch (Function & ACPI_IO_MASK) 469 { 470 case ACPI_READ: 471 472 switch (Function >> 16) 473 { 474 case AML_FIELD_ATTRIB_QUICK: 475 476 Length = 0; 477 break; 478 479 case AML_FIELD_ATTRIB_SEND_RCV: 480 case AML_FIELD_ATTRIB_BYTE: 481 482 Length = 1; 483 break; 484 485 case AML_FIELD_ATTRIB_WORD: 486 case AML_FIELD_ATTRIB_WORD_CALL: 487 488 Length = 2; 489 break; 490 491 case AML_FIELD_ATTRIB_BLOCK: 492 case AML_FIELD_ATTRIB_BLOCK_CALL: 493 494 Length = 32; 495 break; 496 497 case AML_FIELD_ATTRIB_MULTIBYTE: 498 case AML_FIELD_ATTRIB_RAW_BYTES: 499 case AML_FIELD_ATTRIB_RAW_PROCESS: 500 501 Length = MyContext->AccessLength; 502 break; 503 504 default: 505 506 break; 507 } 508 break; 509 510 case ACPI_WRITE: 511 512 switch (Function >> 16) 513 { 514 case AML_FIELD_ATTRIB_QUICK: 515 case AML_FIELD_ATTRIB_SEND_RCV: 516 case AML_FIELD_ATTRIB_BYTE: 517 case AML_FIELD_ATTRIB_WORD: 518 case AML_FIELD_ATTRIB_BLOCK: 519 520 Length = 0; 521 break; 522 523 case AML_FIELD_ATTRIB_WORD_CALL: 524 Length = 2; 525 break; 526 527 case AML_FIELD_ATTRIB_BLOCK_CALL: 528 Length = 32; 529 break; 530 531 case AML_FIELD_ATTRIB_MULTIBYTE: 532 case AML_FIELD_ATTRIB_RAW_BYTES: 533 case AML_FIELD_ATTRIB_RAW_PROCESS: 534 535 Length = MyContext->AccessLength; 536 break; 537 538 default: 539 540 break; 541 } 542 break; 543 544 default: 545 546 break; 547 } 548 549 if (AcpiGbl_DisplayRegionAccess) 550 { 551 AcpiOsPrintf ("AcpiExec: %s " 552 "%s: Attr %X Addr %.4X BaseAddr %.4X Len %.2X Width %X BufLen %X", 553 AcpiUtGetRegionName (SpaceId), 554 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 555 (UINT32) (Function >> 16), 556 (UINT32) Address, (UINT32) BaseAddress, 557 Length, BitWidth, Buffer[1]); 558 559 /* GenericSerialBus has a Connection() parameter */ 560 561 if (SpaceId == ACPI_ADR_SPACE_GSBUS) 562 { 563 Status = AcpiBufferToResource (MyContext->Connection, 564 MyContext->Length, &Resource); 565 566 AcpiOsPrintf (" [AccLen %.2X Conn %p]", 567 MyContext->AccessLength, MyContext->Connection); 568 } 569 AcpiOsPrintf ("\n"); 570 } 571 572 /* Setup the return buffer. Note: ASLTS depends on these fill values */ 573 574 for (i = 0; i < Length; i++) 575 { 576 Buffer[i+2] = (UINT8) (0xA0 + i); 577 } 578 579 Buffer[0] = 0x7A; 580 Buffer[1] = (UINT8) Length; 581 return (AE_OK); 582 583 584 case ACPI_ADR_SPACE_IPMI: /* ACPI 4.0 */ 585 586 if (AcpiGbl_DisplayRegionAccess) 587 { 588 AcpiOsPrintf ("AcpiExec: IPMI " 589 "%s: Attr %X Addr %.4X BaseAddr %.4X Len %.2X Width %X BufLen %X\n", 590 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 591 (UINT32) (Function >> 16), (UINT32) Address, (UINT32) BaseAddress, 592 Length, BitWidth, Buffer[1]); 593 } 594 595 /* 596 * Regardless of a READ or WRITE, this handler is passed a 66-byte 597 * buffer in which to return the IPMI status/length/data. 598 * 599 * Return some example data to show use of the bidirectional buffer 600 */ 601 Buffer[0] = 0; /* Status byte */ 602 Buffer[1] = 64; /* Return buffer data length */ 603 Buffer[2] = 0; /* Completion code */ 604 Buffer[3] = 0; /* Reserved */ 605 606 /* 607 * Fill the 66-byte buffer with the return data. 608 * Note: ASLTS depends on these fill values. 609 */ 610 for (i = 4; i < 66; i++) 611 { 612 Buffer[i] = (UINT8) (i); 613 } 614 return (AE_OK); 615 616 /* 617 * GPIO has some special semantics: 618 * 1) Address is the pin number index into the Connection() pin list 619 * 2) BitWidth is the actual number of bits (pins) defined by the field 620 */ 621 case ACPI_ADR_SPACE_GPIO: /* ACPI 5.0 */ 622 623 if (AcpiGbl_DisplayRegionAccess) 624 { 625 AcpiOsPrintf ("AcpiExec: GPIO " 626 "%s: Addr %.4X Width %X Conn %p\n", 627 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 628 (UINT32) Address, BitWidth, MyContext->Connection); 629 } 630 return (AE_OK); 631 632 default: 633 break; 634 } 635 636 /* 637 * Search through the linked list for this region's buffer 638 */ 639 BufferExists = FALSE; 640 BufferResize = FALSE; 641 RegionElement = AeRegions.RegionList; 642 643 if (AeRegions.NumberOfRegions) 644 { 645 BaseAddressEnd = BaseAddress + Length - 1; 646 while (!BufferExists && RegionElement) 647 { 648 RegionAddress = RegionElement->Address; 649 RegionAddressEnd = RegionElement->Address + RegionElement->Length - 1; 650 RegionLength = RegionElement->Length; 651 652 /* 653 * Overlapping Region Support 654 * 655 * While searching through the region buffer list, determine if an 656 * overlap exists between the requested buffer space and the current 657 * RegionElement space. If there is an overlap then replace the old 658 * buffer with a new buffer of increased size before continuing to 659 * do the read or write 660 */ 661 if (RegionElement->SpaceId != SpaceId || 662 BaseAddressEnd < RegionAddress || 663 BaseAddress > RegionAddressEnd) 664 { 665 /* 666 * Requested buffer is outside of the current RegionElement 667 * bounds 668 */ 669 RegionElement = RegionElement->NextRegion; 670 } 671 else 672 { 673 /* 674 * Some amount of buffer space sharing exists. There are 4 cases 675 * to consider: 676 * 677 * 1. Right overlap 678 * 2. Left overlap 679 * 3. Left and right overlap 680 * 4. Fully contained - no resizing required 681 */ 682 BufferExists = TRUE; 683 684 if ((BaseAddress >= RegionAddress) && 685 (BaseAddress <= RegionAddressEnd) && 686 (BaseAddressEnd > RegionAddressEnd)) 687 { 688 /* Right overlap */ 689 690 RegionElement->Length = (UINT32) (BaseAddress - 691 RegionAddress + Length); 692 BufferResize = TRUE; 693 } 694 695 else if ((BaseAddressEnd >= RegionAddress) && 696 (BaseAddressEnd <= RegionAddressEnd) && 697 (BaseAddress < RegionAddress)) 698 { 699 /* Left overlap */ 700 701 RegionElement->Address = BaseAddress; 702 RegionElement->Length = (UINT32) (RegionAddress - 703 BaseAddress + RegionElement->Length); 704 BufferResize = TRUE; 705 } 706 707 else if ((BaseAddress < RegionAddress) && 708 (BaseAddressEnd > RegionAddressEnd)) 709 { 710 /* Left and right overlap */ 711 712 RegionElement->Address = BaseAddress; 713 RegionElement->Length = Length; 714 BufferResize = TRUE; 715 } 716 717 /* 718 * only remaining case is fully contained for which we don't 719 * need to do anything 720 */ 721 if (BufferResize) 722 { 723 NewBuffer = AcpiOsAllocate (RegionElement->Length); 724 if (!NewBuffer) 725 { 726 return (AE_NO_MEMORY); 727 } 728 729 OldBuffer = RegionElement->Buffer; 730 RegionElement->Buffer = NewBuffer; 731 NewBuffer = NULL; 732 733 /* Initialize the region with the default fill value */ 734 735 memset (RegionElement->Buffer, 736 AcpiGbl_RegionFillValue, RegionElement->Length); 737 738 /* 739 * Get BufferValue to point (within the new buffer) to the 740 * base address of the old buffer 741 */ 742 BufferValue = (UINT8 *) RegionElement->Buffer + 743 (UINT64) RegionAddress - 744 (UINT64) RegionElement->Address; 745 746 /* 747 * Copy the old buffer to its same location within the new 748 * buffer 749 */ 750 memcpy (BufferValue, OldBuffer, RegionLength); 751 AcpiOsFree (OldBuffer); 752 } 753 } 754 } 755 } 756 757 /* 758 * If the Region buffer does not exist, create it now 759 */ 760 if (!BufferExists) 761 { 762 /* Do the memory allocations first */ 763 764 RegionElement = AcpiOsAllocate (sizeof (AE_REGION)); 765 if (!RegionElement) 766 { 767 return (AE_NO_MEMORY); 768 } 769 770 RegionElement->Buffer = AcpiOsAllocate (Length); 771 if (!RegionElement->Buffer) 772 { 773 AcpiOsFree (RegionElement); 774 return (AE_NO_MEMORY); 775 } 776 777 /* Initialize the region with the default fill value */ 778 779 memset (RegionElement->Buffer, AcpiGbl_RegionFillValue, Length); 780 781 RegionElement->Address = BaseAddress; 782 RegionElement->Length = Length; 783 RegionElement->SpaceId = SpaceId; 784 RegionElement->NextRegion = NULL; 785 786 /* 787 * Increment the number of regions and put this one 788 * at the head of the list as it will probably get accessed 789 * more often anyway. 790 */ 791 AeRegions.NumberOfRegions += 1; 792 793 if (AeRegions.RegionList) 794 { 795 RegionElement->NextRegion = AeRegions.RegionList; 796 } 797 798 AeRegions.RegionList = RegionElement; 799 } 800 801 /* Calculate the size of the memory copy */ 802 803 ByteWidth = (BitWidth / 8); 804 805 if (BitWidth % 8) 806 { 807 ByteWidth += 1; 808 } 809 810 /* 811 * The buffer exists and is pointed to by RegionElement. 812 * We now need to verify the request is valid and perform the operation. 813 * 814 * NOTE: RegionElement->Length is in bytes, therefore it we compare against 815 * ByteWidth (see above) 816 */ 817 if ((RegionObject->Region.SpaceId != ACPI_ADR_SPACE_GPIO) && 818 ((UINT64) Address + ByteWidth) > 819 ((UINT64)(RegionElement->Address) + RegionElement->Length)) 820 { 821 ACPI_WARNING ((AE_INFO, 822 "Request on [%4.4s] is beyond region limit Req-0x%X+0x%X, Base=0x%X, Len-0x%X", 823 (RegionObject->Region.Node)->Name.Ascii, (UINT32) Address, 824 ByteWidth, (UINT32)(RegionElement->Address), 825 RegionElement->Length)); 826 827 return (AE_AML_REGION_LIMIT); 828 } 829 830 /* 831 * Get BufferValue to point to the "address" in the buffer 832 */ 833 BufferValue = ((UINT8 *) RegionElement->Buffer + 834 ((UINT64) Address - (UINT64) RegionElement->Address)); 835 836 DoFunction: 837 /* 838 * Perform a read or write to the buffer space 839 */ 840 switch (Function) 841 { 842 case ACPI_READ: 843 /* 844 * Set the pointer Value to whatever is in the buffer 845 */ 846 memcpy (Value, BufferValue, ByteWidth); 847 break; 848 849 case ACPI_WRITE: 850 /* 851 * Write the contents of Value to the buffer 852 */ 853 memcpy (BufferValue, Value, ByteWidth); 854 break; 855 856 default: 857 858 return (AE_BAD_PARAMETER); 859 } 860 861 if (AcpiGbl_DisplayRegionAccess) 862 { 863 switch (SpaceId) 864 { 865 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 866 867 AcpiOsPrintf ("AcpiExec: SystemMemory " 868 "%s: Val %.8X Addr %.4X Width %X [REGION: BaseAddr %.4X Len %.2X]\n", 869 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 870 (UINT32) *Value, (UINT32) Address, BitWidth, (UINT32) BaseAddress, Length); 871 break; 872 873 case ACPI_ADR_SPACE_GPIO: /* ACPI 5.0 */ 874 875 /* This space is required to always be ByteAcc */ 876 877 Status = AcpiBufferToResource (MyContext->Connection, 878 MyContext->Length, &Resource); 879 880 AcpiOsPrintf ("AcpiExec: GeneralPurposeIo " 881 "%s: Val %.8X Addr %.4X BaseAddr %.4X Len %.2X Width %X AccLen %.2X Conn %p\n", 882 (Function & ACPI_IO_MASK) ? "Write" : "Read ", (UINT32) *Value, 883 (UINT32) Address, (UINT32) BaseAddress, Length, BitWidth, 884 MyContext->AccessLength, MyContext->Connection); 885 break; 886 887 default: 888 889 break; 890 } 891 } 892 893 return (AE_OK); 894 } 895