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 - 2018, 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 ACPI_SIZE Length; 193 BOOLEAN BufferExists; 194 BOOLEAN BufferResize; 195 AE_REGION *RegionElement; 196 void *BufferValue; 197 ACPI_STATUS Status; 198 UINT32 ByteWidth; 199 UINT32 RegionLength; 200 UINT32 i; 201 UINT8 SpaceId; 202 ACPI_CONNECTION_INFO *MyContext; 203 UINT32 Value1; 204 UINT32 Value2; 205 ACPI_RESOURCE *Resource; 206 207 208 ACPI_FUNCTION_NAME (AeRegionHandler); 209 210 /* 211 * If the object is not a region, simply return 212 */ 213 if (RegionObject->Region.Type != ACPI_TYPE_REGION) 214 { 215 return (AE_OK); 216 } 217 218 /* Check that we actually got back our context parameter */ 219 220 if (HandlerContext != &AeMyContext) 221 { 222 printf ("Region handler received incorrect context %p, should be %p\n", 223 HandlerContext, &AeMyContext); 224 } 225 226 MyContext = ACPI_CAST_PTR (ACPI_CONNECTION_INFO, HandlerContext); 227 228 /* 229 * Find the region's address space and length before searching 230 * the linked list. 231 */ 232 BaseAddress = RegionObject->Region.Address; 233 Length = (ACPI_SIZE) RegionObject->Region.Length; 234 SpaceId = RegionObject->Region.SpaceId; 235 236 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 237 "Operation Region request on %s at 0x%X, BitWidth 0x%X, RegionLength 0x%X\n", 238 AcpiUtGetRegionName (RegionObject->Region.SpaceId), 239 (UINT32) Address, BitWidth, (UINT32) Length)); 240 241 /* 242 * Region support can be disabled with the -do option. 243 * We use this to support dynamically loaded tables where we pass a valid 244 * address to the AML. 245 */ 246 if (AcpiGbl_DbOpt_NoRegionSupport) 247 { 248 BufferValue = ACPI_TO_POINTER (Address); 249 ByteWidth = (BitWidth / 8); 250 251 if (BitWidth % 8) 252 { 253 ByteWidth += 1; 254 } 255 goto DoFunction; 256 } 257 258 switch (SpaceId) 259 { 260 case ACPI_ADR_SPACE_SYSTEM_IO: 261 /* 262 * For I/O space, exercise the port validation 263 * Note: ReadPort currently always returns all ones, length=BitLength 264 */ 265 switch (Function & ACPI_IO_MASK) 266 { 267 case ACPI_READ: 268 269 if (BitWidth == 64) 270 { 271 /* Split the 64-bit request into two 32-bit requests */ 272 273 Status = AcpiHwReadPort (Address, &Value1, 32); 274 ACPI_CHECK_OK (AcpiHwReadPort, Status); 275 Status = AcpiHwReadPort (Address+4, &Value2, 32); 276 ACPI_CHECK_OK (AcpiHwReadPort, Status); 277 278 *Value = Value1 | ((UINT64) Value2 << 32); 279 } 280 else 281 { 282 Status = AcpiHwReadPort (Address, &Value1, BitWidth); 283 ACPI_CHECK_OK (AcpiHwReadPort, Status); 284 *Value = (UINT64) Value1; 285 } 286 break; 287 288 case ACPI_WRITE: 289 290 if (BitWidth == 64) 291 { 292 /* Split the 64-bit request into two 32-bit requests */ 293 294 Status = AcpiHwWritePort (Address, ACPI_LODWORD (*Value), 32); 295 ACPI_CHECK_OK (AcpiHwWritePort, Status); 296 Status = AcpiHwWritePort (Address+4, ACPI_HIDWORD (*Value), 32); 297 ACPI_CHECK_OK (AcpiHwWritePort, Status); 298 } 299 else 300 { 301 Status = AcpiHwWritePort (Address, (UINT32) *Value, BitWidth); 302 ACPI_CHECK_OK (AcpiHwWritePort, Status); 303 } 304 break; 305 306 default: 307 308 Status = AE_BAD_PARAMETER; 309 break; 310 } 311 312 if (ACPI_FAILURE (Status)) 313 { 314 return (Status); 315 } 316 317 /* Now go ahead and simulate the hardware */ 318 break; 319 320 /* 321 * SMBus and GenericSerialBus support the various bidirectional 322 * protocols. 323 */ 324 case ACPI_ADR_SPACE_SMBUS: 325 case ACPI_ADR_SPACE_GSBUS: /* ACPI 5.0 */ 326 327 Length = 0; 328 329 switch (Function & ACPI_IO_MASK) 330 { 331 case ACPI_READ: 332 333 switch (Function >> 16) 334 { 335 case AML_FIELD_ATTRIB_QUICK: 336 337 Length = 0; 338 break; 339 340 case AML_FIELD_ATTRIB_SEND_RCV: 341 case AML_FIELD_ATTRIB_BYTE: 342 343 Length = 1; 344 break; 345 346 case AML_FIELD_ATTRIB_WORD: 347 case AML_FIELD_ATTRIB_WORD_CALL: 348 349 Length = 2; 350 break; 351 352 case AML_FIELD_ATTRIB_BLOCK: 353 case AML_FIELD_ATTRIB_BLOCK_CALL: 354 355 Length = 32; 356 break; 357 358 case AML_FIELD_ATTRIB_MULTIBYTE: 359 case AML_FIELD_ATTRIB_RAW_BYTES: 360 case AML_FIELD_ATTRIB_RAW_PROCESS: 361 362 Length = MyContext->AccessLength; 363 break; 364 365 default: 366 367 break; 368 } 369 break; 370 371 case ACPI_WRITE: 372 373 switch (Function >> 16) 374 { 375 case AML_FIELD_ATTRIB_QUICK: 376 case AML_FIELD_ATTRIB_SEND_RCV: 377 case AML_FIELD_ATTRIB_BYTE: 378 case AML_FIELD_ATTRIB_WORD: 379 case AML_FIELD_ATTRIB_BLOCK: 380 381 Length = 0; 382 break; 383 384 case AML_FIELD_ATTRIB_WORD_CALL: 385 Length = 2; 386 break; 387 388 case AML_FIELD_ATTRIB_BLOCK_CALL: 389 Length = 32; 390 break; 391 392 case AML_FIELD_ATTRIB_MULTIBYTE: 393 case AML_FIELD_ATTRIB_RAW_BYTES: 394 case AML_FIELD_ATTRIB_RAW_PROCESS: 395 396 Length = MyContext->AccessLength; 397 break; 398 399 default: 400 401 break; 402 } 403 break; 404 405 default: 406 407 break; 408 } 409 410 if (AcpiGbl_DisplayRegionAccess) 411 { 412 AcpiOsPrintf ("AcpiExec: %s " 413 "%s: Attr %X Addr %.4X BaseAddr %.4X Length %.2X BitWidth %X BufLen %X", 414 AcpiUtGetRegionName (SpaceId), 415 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 416 (UINT32) (Function >> 16), 417 (UINT32) Address, (UINT32) BaseAddress, 418 Length, BitWidth, Buffer[1]); 419 420 /* GenericSerialBus has a Connection() parameter */ 421 422 if (SpaceId == ACPI_ADR_SPACE_GSBUS) 423 { 424 Status = AcpiBufferToResource (MyContext->Connection, 425 MyContext->Length, &Resource); 426 427 AcpiOsPrintf (" [AccessLength %.2X Connnection %p]", 428 MyContext->AccessLength, MyContext->Connection); 429 } 430 AcpiOsPrintf ("\n"); 431 } 432 433 /* Setup the return buffer. Note: ASLTS depends on these fill values */ 434 435 for (i = 0; i < Length; i++) 436 { 437 Buffer[i+2] = (UINT8) (0xA0 + i); 438 } 439 440 Buffer[0] = 0x7A; 441 Buffer[1] = (UINT8) Length; 442 return (AE_OK); 443 444 445 case ACPI_ADR_SPACE_IPMI: /* ACPI 4.0 */ 446 447 if (AcpiGbl_DisplayRegionAccess) 448 { 449 AcpiOsPrintf ("AcpiExec: IPMI " 450 "%s: Attr %X Addr %.4X BaseAddr %.4X Len %.2X Width %X BufLen %X\n", 451 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 452 (UINT32) (Function >> 16), (UINT32) Address, (UINT32) BaseAddress, 453 Length, BitWidth, Buffer[1]); 454 } 455 456 /* 457 * Regardless of a READ or WRITE, this handler is passed a 66-byte 458 * buffer in which to return the IPMI status/length/data. 459 * 460 * Return some example data to show use of the bidirectional buffer 461 */ 462 Buffer[0] = 0; /* Status byte */ 463 Buffer[1] = 64; /* Return buffer data length */ 464 Buffer[2] = 0; /* Completion code */ 465 Buffer[3] = 0; /* Reserved */ 466 467 /* 468 * Fill the 66-byte buffer with the return data. 469 * Note: ASLTS depends on these fill values. 470 */ 471 for (i = 4; i < 66; i++) 472 { 473 Buffer[i] = (UINT8) (i); 474 } 475 return (AE_OK); 476 477 /* 478 * GPIO has some special semantics: 479 * 1) Address is the pin number index into the Connection() pin list 480 * 2) BitWidth is the actual number of bits (pins) defined by the field 481 */ 482 case ACPI_ADR_SPACE_GPIO: /* ACPI 5.0 */ 483 484 if (AcpiGbl_DisplayRegionAccess) 485 { 486 AcpiOsPrintf ("AcpiExec: GPIO " 487 "%s: Addr %.4X Width %X Conn %p\n", 488 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 489 (UINT32) Address, BitWidth, MyContext->Connection); 490 } 491 return (AE_OK); 492 493 default: 494 break; 495 } 496 497 /* 498 * Search through the linked list for this region's buffer 499 */ 500 BufferExists = FALSE; 501 BufferResize = FALSE; 502 RegionElement = AeRegions.RegionList; 503 504 if (AeRegions.NumberOfRegions) 505 { 506 BaseAddressEnd = BaseAddress + Length - 1; 507 while (!BufferExists && RegionElement) 508 { 509 RegionAddress = RegionElement->Address; 510 RegionAddressEnd = RegionElement->Address + RegionElement->Length - 1; 511 RegionLength = RegionElement->Length; 512 513 /* 514 * Overlapping Region Support 515 * 516 * While searching through the region buffer list, determine if an 517 * overlap exists between the requested buffer space and the current 518 * RegionElement space. If there is an overlap then replace the old 519 * buffer with a new buffer of increased size before continuing to 520 * do the read or write 521 */ 522 if (RegionElement->SpaceId != SpaceId || 523 BaseAddressEnd < RegionAddress || 524 BaseAddress > RegionAddressEnd) 525 { 526 /* 527 * Requested buffer is outside of the current RegionElement 528 * bounds 529 */ 530 RegionElement = RegionElement->NextRegion; 531 } 532 else 533 { 534 /* 535 * Some amount of buffer space sharing exists. There are 4 cases 536 * to consider: 537 * 538 * 1. Right overlap 539 * 2. Left overlap 540 * 3. Left and right overlap 541 * 4. Fully contained - no resizing required 542 */ 543 BufferExists = TRUE; 544 545 if ((BaseAddress >= RegionAddress) && 546 (BaseAddress <= RegionAddressEnd) && 547 (BaseAddressEnd > RegionAddressEnd)) 548 { 549 /* Right overlap */ 550 551 RegionElement->Length = (UINT32) (BaseAddress - 552 RegionAddress + Length); 553 BufferResize = TRUE; 554 } 555 556 else if ((BaseAddressEnd >= RegionAddress) && 557 (BaseAddressEnd <= RegionAddressEnd) && 558 (BaseAddress < RegionAddress)) 559 { 560 /* Left overlap */ 561 562 RegionElement->Address = BaseAddress; 563 RegionElement->Length = (UINT32) (RegionAddress - 564 BaseAddress + RegionElement->Length); 565 BufferResize = TRUE; 566 } 567 568 else if ((BaseAddress < RegionAddress) && 569 (BaseAddressEnd > RegionAddressEnd)) 570 { 571 /* Left and right overlap */ 572 573 RegionElement->Address = BaseAddress; 574 RegionElement->Length = Length; 575 BufferResize = TRUE; 576 } 577 578 /* 579 * only remaining case is fully contained for which we don't 580 * need to do anything 581 */ 582 if (BufferResize) 583 { 584 NewBuffer = AcpiOsAllocate (RegionElement->Length); 585 if (!NewBuffer) 586 { 587 return (AE_NO_MEMORY); 588 } 589 590 OldBuffer = RegionElement->Buffer; 591 RegionElement->Buffer = NewBuffer; 592 NewBuffer = NULL; 593 594 /* Initialize the region with the default fill value */ 595 596 memset (RegionElement->Buffer, 597 AcpiGbl_RegionFillValue, RegionElement->Length); 598 599 /* 600 * Get BufferValue to point (within the new buffer) to the 601 * base address of the old buffer 602 */ 603 BufferValue = (UINT8 *) RegionElement->Buffer + 604 (UINT64) RegionAddress - 605 (UINT64) RegionElement->Address; 606 607 /* 608 * Copy the old buffer to its same location within the new 609 * buffer 610 */ 611 memcpy (BufferValue, OldBuffer, RegionLength); 612 AcpiOsFree (OldBuffer); 613 } 614 } 615 } 616 } 617 618 /* 619 * If the Region buffer does not exist, create it now 620 */ 621 if (!BufferExists) 622 { 623 /* Do the memory allocations first */ 624 625 RegionElement = AcpiOsAllocate (sizeof (AE_REGION)); 626 if (!RegionElement) 627 { 628 return (AE_NO_MEMORY); 629 } 630 631 RegionElement->Buffer = AcpiOsAllocate (Length); 632 if (!RegionElement->Buffer) 633 { 634 AcpiOsFree (RegionElement); 635 return (AE_NO_MEMORY); 636 } 637 638 /* Initialize the region with the default fill value */ 639 640 memset (RegionElement->Buffer, AcpiGbl_RegionFillValue, Length); 641 642 RegionElement->Address = BaseAddress; 643 RegionElement->Length = Length; 644 RegionElement->SpaceId = SpaceId; 645 RegionElement->NextRegion = NULL; 646 647 /* 648 * Increment the number of regions and put this one 649 * at the head of the list as it will probably get accessed 650 * more often anyway. 651 */ 652 AeRegions.NumberOfRegions += 1; 653 654 if (AeRegions.RegionList) 655 { 656 RegionElement->NextRegion = AeRegions.RegionList; 657 } 658 659 AeRegions.RegionList = RegionElement; 660 } 661 662 /* Calculate the size of the memory copy */ 663 664 ByteWidth = (BitWidth / 8); 665 666 if (BitWidth % 8) 667 { 668 ByteWidth += 1; 669 } 670 671 /* 672 * The buffer exists and is pointed to by RegionElement. 673 * We now need to verify the request is valid and perform the operation. 674 * 675 * NOTE: RegionElement->Length is in bytes, therefore it we compare against 676 * ByteWidth (see above) 677 */ 678 if ((RegionObject->Region.SpaceId != ACPI_ADR_SPACE_GPIO) && 679 ((UINT64) Address + ByteWidth) > 680 ((UINT64)(RegionElement->Address) + RegionElement->Length)) 681 { 682 ACPI_WARNING ((AE_INFO, 683 "Request on [%4.4s] is beyond region limit " 684 "Req-0x%X+0x%X, Base=0x%X, Len-0x%X", 685 (RegionObject->Region.Node)->Name.Ascii, (UINT32) Address, 686 ByteWidth, (UINT32)(RegionElement->Address), 687 RegionElement->Length)); 688 689 return (AE_AML_REGION_LIMIT); 690 } 691 692 /* 693 * Get BufferValue to point to the "address" in the buffer 694 */ 695 BufferValue = ((UINT8 *) RegionElement->Buffer + 696 ((UINT64) Address - (UINT64) RegionElement->Address)); 697 698 DoFunction: 699 /* 700 * Perform a read or write to the buffer space 701 */ 702 switch (Function) 703 { 704 case ACPI_READ: 705 /* 706 * Set the pointer Value to whatever is in the buffer 707 */ 708 memcpy (Value, BufferValue, ByteWidth); 709 break; 710 711 case ACPI_WRITE: 712 /* 713 * Write the contents of Value to the buffer 714 */ 715 memcpy (BufferValue, Value, ByteWidth); 716 break; 717 718 default: 719 720 return (AE_BAD_PARAMETER); 721 } 722 723 if (AcpiGbl_DisplayRegionAccess) 724 { 725 switch (SpaceId) 726 { 727 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 728 729 AcpiOsPrintf ("AcpiExec: SystemMemory " 730 "%s: Val %.8X Addr %.4X Width %X [REGION: BaseAddr %.4X Len %.2X]\n", 731 (Function & ACPI_IO_MASK) ? "Write" : "Read ", 732 (UINT32) *Value, (UINT32) Address, BitWidth, (UINT32) BaseAddress, Length); 733 break; 734 735 case ACPI_ADR_SPACE_GPIO: /* ACPI 5.0 */ 736 737 /* This space is required to always be ByteAcc */ 738 739 Status = AcpiBufferToResource (MyContext->Connection, 740 MyContext->Length, &Resource); 741 742 AcpiOsPrintf ("AcpiExec: GeneralPurposeIo " 743 "%s: Val %.8X Addr %.4X BaseAddr %.4X Len %.2X Width %X AccLen %.2X Conn %p\n", 744 (Function & ACPI_IO_MASK) ? "Write" : "Read ", (UINT32) *Value, 745 (UINT32) Address, (UINT32) BaseAddress, Length, BitWidth, 746 MyContext->AccessLength, MyContext->Connection); 747 break; 748 749 default: 750 751 break; 752 } 753 } 754 755 return (AE_OK); 756 } 757