1 /****************************************************************************** 2 * 3 * Module Name: exregion - ACPI default OpRegion (address space) handlers 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2016, 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 #include "acpi.h" 117 #include "accommon.h" 118 #include "acinterp.h" 119 120 121 #define _COMPONENT ACPI_EXECUTER 122 ACPI_MODULE_NAME ("exregion") 123 124 125 /******************************************************************************* 126 * 127 * FUNCTION: AcpiExSystemMemorySpaceHandler 128 * 129 * PARAMETERS: Function - Read or Write operation 130 * Address - Where in the space to read or write 131 * BitWidth - Field width in bits (8, 16, or 32) 132 * Value - Pointer to in or out value 133 * HandlerContext - Pointer to Handler's context 134 * RegionContext - Pointer to context specific to the 135 * accessed region 136 * 137 * RETURN: Status 138 * 139 * DESCRIPTION: Handler for the System Memory address space (Op Region) 140 * 141 ******************************************************************************/ 142 143 ACPI_STATUS 144 AcpiExSystemMemorySpaceHandler ( 145 UINT32 Function, 146 ACPI_PHYSICAL_ADDRESS Address, 147 UINT32 BitWidth, 148 UINT64 *Value, 149 void *HandlerContext, 150 void *RegionContext) 151 { 152 ACPI_STATUS Status = AE_OK; 153 void *LogicalAddrPtr = NULL; 154 ACPI_MEM_SPACE_CONTEXT *MemInfo = RegionContext; 155 UINT32 Length; 156 ACPI_SIZE MapLength; 157 ACPI_SIZE PageBoundaryMapLength; 158 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED 159 UINT32 Remainder; 160 #endif 161 162 163 ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler); 164 165 166 /* Validate and translate the bit width */ 167 168 switch (BitWidth) 169 { 170 case 8: 171 172 Length = 1; 173 break; 174 175 case 16: 176 177 Length = 2; 178 break; 179 180 case 32: 181 182 Length = 4; 183 break; 184 185 case 64: 186 187 Length = 8; 188 break; 189 190 default: 191 192 ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %u", 193 BitWidth)); 194 return_ACPI_STATUS (AE_AML_OPERAND_VALUE); 195 } 196 197 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED 198 /* 199 * Hardware does not support non-aligned data transfers, we must verify 200 * the request. 201 */ 202 (void) AcpiUtShortDivide ((UINT64) Address, Length, NULL, &Remainder); 203 if (Remainder != 0) 204 { 205 return_ACPI_STATUS (AE_AML_ALIGNMENT); 206 } 207 #endif 208 209 /* 210 * Does the request fit into the cached memory mapping? 211 * Is 1) Address below the current mapping? OR 212 * 2) Address beyond the current mapping? 213 */ 214 if ((Address < MemInfo->MappedPhysicalAddress) || 215 (((UINT64) Address + Length) > 216 ((UINT64) 217 MemInfo->MappedPhysicalAddress + MemInfo->MappedLength))) 218 { 219 /* 220 * The request cannot be resolved by the current memory mapping; 221 * Delete the existing mapping and create a new one. 222 */ 223 if (MemInfo->MappedLength) 224 { 225 /* Valid mapping, delete it */ 226 227 AcpiOsUnmapMemory (MemInfo->MappedLogicalAddress, 228 MemInfo->MappedLength); 229 } 230 231 /* 232 * October 2009: Attempt to map from the requested address to the 233 * end of the region. However, we will never map more than one 234 * page, nor will we cross a page boundary. 235 */ 236 MapLength = (ACPI_SIZE) 237 ((MemInfo->Address + MemInfo->Length) - Address); 238 239 /* 240 * If mapping the entire remaining portion of the region will cross 241 * a page boundary, just map up to the page boundary, do not cross. 242 * On some systems, crossing a page boundary while mapping regions 243 * can cause warnings if the pages have different attributes 244 * due to resource management. 245 * 246 * This has the added benefit of constraining a single mapping to 247 * one page, which is similar to the original code that used a 4k 248 * maximum window. 249 */ 250 PageBoundaryMapLength = (ACPI_SIZE) 251 (ACPI_ROUND_UP (Address, ACPI_DEFAULT_PAGE_SIZE) - Address); 252 if (PageBoundaryMapLength == 0) 253 { 254 PageBoundaryMapLength = ACPI_DEFAULT_PAGE_SIZE; 255 } 256 257 if (MapLength > PageBoundaryMapLength) 258 { 259 MapLength = PageBoundaryMapLength; 260 } 261 262 /* Create a new mapping starting at the address given */ 263 264 MemInfo->MappedLogicalAddress = AcpiOsMapMemory (Address, MapLength); 265 if (!MemInfo->MappedLogicalAddress) 266 { 267 ACPI_ERROR ((AE_INFO, 268 "Could not map memory at 0x%8.8X%8.8X, size %u", 269 ACPI_FORMAT_UINT64 (Address), (UINT32) MapLength)); 270 MemInfo->MappedLength = 0; 271 return_ACPI_STATUS (AE_NO_MEMORY); 272 } 273 274 /* Save the physical address and mapping size */ 275 276 MemInfo->MappedPhysicalAddress = Address; 277 MemInfo->MappedLength = MapLength; 278 } 279 280 /* 281 * Generate a logical pointer corresponding to the address we want to 282 * access 283 */ 284 LogicalAddrPtr = MemInfo->MappedLogicalAddress + 285 ((UINT64) Address - (UINT64) MemInfo->MappedPhysicalAddress); 286 287 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 288 "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n", 289 BitWidth, Function, ACPI_FORMAT_UINT64 (Address))); 290 291 /* 292 * Perform the memory read or write 293 * 294 * Note: For machines that do not support non-aligned transfers, the target 295 * address was checked for alignment above. We do not attempt to break the 296 * transfer up into smaller (byte-size) chunks because the AML specifically 297 * asked for a transfer width that the hardware may require. 298 */ 299 switch (Function) 300 { 301 case ACPI_READ: 302 303 *Value = 0; 304 switch (BitWidth) 305 { 306 case 8: 307 308 *Value = (UINT64) ACPI_GET8 (LogicalAddrPtr); 309 break; 310 311 case 16: 312 313 *Value = (UINT64) ACPI_GET16 (LogicalAddrPtr); 314 break; 315 316 case 32: 317 318 *Value = (UINT64) ACPI_GET32 (LogicalAddrPtr); 319 break; 320 321 case 64: 322 323 *Value = (UINT64) ACPI_GET64 (LogicalAddrPtr); 324 break; 325 326 default: 327 328 /* BitWidth was already validated */ 329 330 break; 331 } 332 break; 333 334 case ACPI_WRITE: 335 336 switch (BitWidth) 337 { 338 case 8: 339 340 ACPI_SET8 (LogicalAddrPtr, *Value); 341 break; 342 343 case 16: 344 345 ACPI_SET16 (LogicalAddrPtr, *Value); 346 break; 347 348 case 32: 349 350 ACPI_SET32 (LogicalAddrPtr, *Value); 351 break; 352 353 case 64: 354 355 ACPI_SET64 (LogicalAddrPtr, *Value); 356 break; 357 358 default: 359 360 /* BitWidth was already validated */ 361 362 break; 363 } 364 break; 365 366 default: 367 368 Status = AE_BAD_PARAMETER; 369 break; 370 } 371 372 return_ACPI_STATUS (Status); 373 } 374 375 376 /******************************************************************************* 377 * 378 * FUNCTION: AcpiExSystemIoSpaceHandler 379 * 380 * PARAMETERS: Function - Read or Write operation 381 * Address - Where in the space to read or write 382 * BitWidth - Field width in bits (8, 16, or 32) 383 * Value - Pointer to in or out value 384 * HandlerContext - Pointer to Handler's context 385 * RegionContext - Pointer to context specific to the 386 * accessed region 387 * 388 * RETURN: Status 389 * 390 * DESCRIPTION: Handler for the System IO address space (Op Region) 391 * 392 ******************************************************************************/ 393 394 ACPI_STATUS 395 AcpiExSystemIoSpaceHandler ( 396 UINT32 Function, 397 ACPI_PHYSICAL_ADDRESS Address, 398 UINT32 BitWidth, 399 UINT64 *Value, 400 void *HandlerContext, 401 void *RegionContext) 402 { 403 ACPI_STATUS Status = AE_OK; 404 UINT32 Value32; 405 406 407 ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler); 408 409 410 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 411 "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n", 412 BitWidth, Function, ACPI_FORMAT_UINT64 (Address))); 413 414 /* Decode the function parameter */ 415 416 switch (Function) 417 { 418 case ACPI_READ: 419 420 Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address, 421 &Value32, BitWidth); 422 *Value = Value32; 423 break; 424 425 case ACPI_WRITE: 426 427 Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address, 428 (UINT32) *Value, BitWidth); 429 break; 430 431 default: 432 433 Status = AE_BAD_PARAMETER; 434 break; 435 } 436 437 return_ACPI_STATUS (Status); 438 } 439 440 441 /******************************************************************************* 442 * 443 * FUNCTION: AcpiExPciConfigSpaceHandler 444 * 445 * PARAMETERS: Function - Read or Write operation 446 * Address - Where in the space to read or write 447 * BitWidth - Field width in bits (8, 16, or 32) 448 * Value - Pointer to in or out value 449 * HandlerContext - Pointer to Handler's context 450 * RegionContext - Pointer to context specific to the 451 * accessed region 452 * 453 * RETURN: Status 454 * 455 * DESCRIPTION: Handler for the PCI Config address space (Op Region) 456 * 457 ******************************************************************************/ 458 459 ACPI_STATUS 460 AcpiExPciConfigSpaceHandler ( 461 UINT32 Function, 462 ACPI_PHYSICAL_ADDRESS Address, 463 UINT32 BitWidth, 464 UINT64 *Value, 465 void *HandlerContext, 466 void *RegionContext) 467 { 468 ACPI_STATUS Status = AE_OK; 469 ACPI_PCI_ID *PciId; 470 UINT16 PciRegister; 471 472 473 ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler); 474 475 476 /* 477 * The arguments to AcpiOs(Read|Write)PciConfiguration are: 478 * 479 * PciSegment is the PCI bus segment range 0-31 480 * PciBus is the PCI bus number range 0-255 481 * PciDevice is the PCI device number range 0-31 482 * PciFunction is the PCI device function number 483 * PciRegister is the Config space register range 0-255 bytes 484 * 485 * Value - input value for write, output address for read 486 * 487 */ 488 PciId = (ACPI_PCI_ID *) RegionContext; 489 PciRegister = (UINT16) (UINT32) Address; 490 491 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 492 "Pci-Config %u (%u) Seg(%04x) Bus(%04x) " 493 "Dev(%04x) Func(%04x) Reg(%04x)\n", 494 Function, BitWidth, PciId->Segment, PciId->Bus, PciId->Device, 495 PciId->Function, PciRegister)); 496 497 switch (Function) 498 { 499 case ACPI_READ: 500 501 *Value = 0; 502 Status = AcpiOsReadPciConfiguration ( 503 PciId, PciRegister, Value, BitWidth); 504 break; 505 506 case ACPI_WRITE: 507 508 Status = AcpiOsWritePciConfiguration ( 509 PciId, PciRegister, *Value, BitWidth); 510 break; 511 512 default: 513 514 Status = AE_BAD_PARAMETER; 515 break; 516 } 517 518 return_ACPI_STATUS (Status); 519 } 520 521 522 /******************************************************************************* 523 * 524 * FUNCTION: AcpiExCmosSpaceHandler 525 * 526 * PARAMETERS: Function - Read or Write operation 527 * Address - Where in the space to read or write 528 * BitWidth - Field width in bits (8, 16, or 32) 529 * Value - Pointer to in or out value 530 * HandlerContext - Pointer to Handler's context 531 * RegionContext - Pointer to context specific to the 532 * accessed region 533 * 534 * RETURN: Status 535 * 536 * DESCRIPTION: Handler for the CMOS address space (Op Region) 537 * 538 ******************************************************************************/ 539 540 ACPI_STATUS 541 AcpiExCmosSpaceHandler ( 542 UINT32 Function, 543 ACPI_PHYSICAL_ADDRESS Address, 544 UINT32 BitWidth, 545 UINT64 *Value, 546 void *HandlerContext, 547 void *RegionContext) 548 { 549 ACPI_STATUS Status = AE_OK; 550 551 552 ACPI_FUNCTION_TRACE (ExCmosSpaceHandler); 553 554 555 return_ACPI_STATUS (Status); 556 } 557 558 559 /******************************************************************************* 560 * 561 * FUNCTION: AcpiExPciBarSpaceHandler 562 * 563 * PARAMETERS: Function - Read or Write operation 564 * Address - Where in the space to read or write 565 * BitWidth - Field width in bits (8, 16, or 32) 566 * Value - Pointer to in or out value 567 * HandlerContext - Pointer to Handler's context 568 * RegionContext - Pointer to context specific to the 569 * accessed region 570 * 571 * RETURN: Status 572 * 573 * DESCRIPTION: Handler for the PCI BarTarget address space (Op Region) 574 * 575 ******************************************************************************/ 576 577 ACPI_STATUS 578 AcpiExPciBarSpaceHandler ( 579 UINT32 Function, 580 ACPI_PHYSICAL_ADDRESS Address, 581 UINT32 BitWidth, 582 UINT64 *Value, 583 void *HandlerContext, 584 void *RegionContext) 585 { 586 ACPI_STATUS Status = AE_OK; 587 588 589 ACPI_FUNCTION_TRACE (ExPciBarSpaceHandler); 590 591 592 return_ACPI_STATUS (Status); 593 } 594 595 596 /******************************************************************************* 597 * 598 * FUNCTION: AcpiExDataTableSpaceHandler 599 * 600 * PARAMETERS: Function - Read or Write operation 601 * Address - Where in the space to read or write 602 * BitWidth - Field width in bits (8, 16, or 32) 603 * Value - Pointer to in or out value 604 * HandlerContext - Pointer to Handler's context 605 * RegionContext - Pointer to context specific to the 606 * accessed region 607 * 608 * RETURN: Status 609 * 610 * DESCRIPTION: Handler for the Data Table address space (Op Region) 611 * 612 ******************************************************************************/ 613 614 ACPI_STATUS 615 AcpiExDataTableSpaceHandler ( 616 UINT32 Function, 617 ACPI_PHYSICAL_ADDRESS Address, 618 UINT32 BitWidth, 619 UINT64 *Value, 620 void *HandlerContext, 621 void *RegionContext) 622 { 623 ACPI_FUNCTION_TRACE (ExDataTableSpaceHandler); 624 625 626 /* 627 * Perform the memory read or write. The BitWidth was already 628 * validated. 629 */ 630 switch (Function) 631 { 632 case ACPI_READ: 633 634 memcpy (ACPI_CAST_PTR (char, Value), ACPI_PHYSADDR_TO_PTR (Address), 635 ACPI_DIV_8 (BitWidth)); 636 break; 637 638 case ACPI_WRITE: 639 640 memcpy (ACPI_PHYSADDR_TO_PTR (Address), ACPI_CAST_PTR (char, Value), 641 ACPI_DIV_8 (BitWidth)); 642 break; 643 644 default: 645 646 return_ACPI_STATUS (AE_BAD_PARAMETER); 647 } 648 649 return_ACPI_STATUS (AE_OK); 650 } 651