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 - 2024, 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 <contrib/dev/acpica/include/acpi.h>
153 #include <contrib/dev/acpica/include/accommon.h>
154 #include <contrib/dev/acpica/include/acinterp.h>
155
156
157 #define _COMPONENT ACPI_EXECUTER
158 ACPI_MODULE_NAME ("exregion")
159
160
161 /*******************************************************************************
162 *
163 * FUNCTION: AcpiExSystemMemorySpaceHandler
164 *
165 * PARAMETERS: Function - Read or Write operation
166 * Address - Where in the space to read or write
167 * BitWidth - Field width in bits (8, 16, or 32)
168 * Value - Pointer to in or out value
169 * HandlerContext - Pointer to Handler's context
170 * RegionContext - Pointer to context specific to the
171 * accessed region
172 *
173 * RETURN: Status
174 *
175 * DESCRIPTION: Handler for the System Memory address space (Op Region)
176 *
177 ******************************************************************************/
178
179 ACPI_STATUS
AcpiExSystemMemorySpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)180 AcpiExSystemMemorySpaceHandler (
181 UINT32 Function,
182 ACPI_PHYSICAL_ADDRESS Address,
183 UINT32 BitWidth,
184 UINT64 *Value,
185 void *HandlerContext,
186 void *RegionContext)
187 {
188 ACPI_STATUS Status = AE_OK;
189 void *LogicalAddrPtr = NULL;
190 ACPI_MEM_SPACE_CONTEXT *MemInfo = RegionContext;
191 ACPI_MEM_MAPPING *Mm = MemInfo->CurMm;
192 UINT32 Length;
193 ACPI_SIZE MapLength;
194 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
195 UINT32 Remainder;
196 #endif
197
198
199 ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);
200
201
202 /* Validate and translate the bit width */
203
204 switch (BitWidth)
205 {
206 case 8:
207
208 Length = 1;
209 break;
210
211 case 16:
212
213 Length = 2;
214 break;
215
216 case 32:
217
218 Length = 4;
219 break;
220
221 case 64:
222
223 Length = 8;
224 break;
225
226 default:
227
228 ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %u",
229 BitWidth));
230 return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
231 }
232
233 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
234 /*
235 * Hardware does not support non-aligned data transfers, we must verify
236 * the request.
237 */
238 (void) AcpiUtShortDivide ((UINT64) Address, Length, NULL, &Remainder);
239 if (Remainder != 0)
240 {
241 return_ACPI_STATUS (AE_AML_ALIGNMENT);
242 }
243 #endif
244
245 /*
246 * Does the request fit into the cached memory mapping?
247 * Is 1) Address below the current mapping? OR
248 * 2) Address beyond the current mapping?
249 */
250 if (!Mm || (Address < Mm->PhysicalAddress) ||
251 ((UINT64) Address + Length > (UINT64) Mm->PhysicalAddress + Mm->Length))
252 {
253 /*
254 * The request cannot be resolved by the current memory mapping.
255 *
256 * Look for an existing saved mapping covering the address range
257 * at hand. If found, save it as the current one and carry out
258 * the access.
259 */
260 for (Mm = MemInfo->FirstMm; Mm; Mm = Mm->NextMm)
261 {
262 if (Mm == MemInfo->CurMm)
263 {
264 continue;
265 }
266
267 if (Address < Mm->PhysicalAddress)
268 {
269 continue;
270 }
271
272 if ((UINT64) Address + Length > (UINT64) Mm->PhysicalAddress + Mm->Length)
273 {
274 continue;
275 }
276
277 MemInfo->CurMm = Mm;
278 goto access;
279 }
280
281 /* Create a new mappings list entry */
282
283 Mm = ACPI_ALLOCATE_ZEROED(sizeof(*Mm));
284 if (!Mm)
285 {
286 ACPI_ERROR((AE_INFO,
287 "Unable to save memory mapping at 0x%8.8X%8.8X, size %u",
288 ACPI_FORMAT_UINT64(Address), Length));
289 return_ACPI_STATUS(AE_NO_MEMORY);
290 }
291
292 /*
293 * October 2009: Attempt to map from the requested address to the
294 * end of the region. However, we will never map more than one
295 * page, nor will we cross a page boundary.
296 */
297 MapLength = (ACPI_SIZE)
298 ((MemInfo->Address + MemInfo->Length) - Address);
299
300 if (MapLength > ACPI_DEFAULT_PAGE_SIZE)
301 {
302 MapLength = ACPI_DEFAULT_PAGE_SIZE;
303 }
304
305 /* Create a new mapping starting at the address given */
306
307 LogicalAddrPtr = AcpiOsMapMemory(Address, MapLength);
308 if (!LogicalAddrPtr)
309 {
310 ACPI_ERROR ((AE_INFO,
311 "Could not map memory at 0x%8.8X%8.8X, size %u",
312 ACPI_FORMAT_UINT64 (Address), (UINT32) MapLength));
313 ACPI_FREE(Mm);
314 return_ACPI_STATUS (AE_NO_MEMORY);
315 }
316
317 /* Save the physical address and mapping size */
318
319 Mm->LogicalAddress = LogicalAddrPtr;
320 Mm->PhysicalAddress = Address;
321 Mm->Length = MapLength;
322
323 /*
324 * Add the new entry to the mappigs list and save it as the
325 * current mapping.
326 */
327 Mm->NextMm = MemInfo->FirstMm;
328 MemInfo->FirstMm = Mm;
329 MemInfo->CurMm = Mm;
330 }
331
332 access:
333 /*
334 * Generate a logical pointer corresponding to the address we want to
335 * access
336 */
337 LogicalAddrPtr = Mm->LogicalAddress +
338 ((UINT64) Address - (UINT64) Mm->PhysicalAddress);
339
340 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
341 "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
342 BitWidth, Function, ACPI_FORMAT_UINT64 (Address)));
343
344 /*
345 * Perform the memory read or write
346 *
347 * Note: For machines that do not support non-aligned transfers, the target
348 * address was checked for alignment above. We do not attempt to break the
349 * transfer up into smaller (byte-size) chunks because the AML specifically
350 * asked for a transfer width that the hardware may require.
351 */
352 switch (Function)
353 {
354 case ACPI_READ:
355
356 *Value = 0;
357 switch (BitWidth)
358 {
359 case 8:
360
361 *Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);
362 break;
363
364 case 16:
365
366 *Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);
367 break;
368
369 case 32:
370
371 *Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);
372 break;
373
374 case 64:
375
376 *Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);
377 break;
378
379 default:
380
381 /* BitWidth was already validated */
382
383 break;
384 }
385 break;
386
387 case ACPI_WRITE:
388
389 switch (BitWidth)
390 {
391 case 8:
392
393 ACPI_SET8 (LogicalAddrPtr, *Value);
394 break;
395
396 case 16:
397
398 ACPI_SET16 (LogicalAddrPtr, *Value);
399 break;
400
401 case 32:
402
403 ACPI_SET32 (LogicalAddrPtr, *Value);
404 break;
405
406 case 64:
407
408 ACPI_SET64 (LogicalAddrPtr, *Value);
409 break;
410
411 default:
412
413 /* BitWidth was already validated */
414
415 break;
416 }
417 break;
418
419 default:
420
421 Status = AE_BAD_PARAMETER;
422 break;
423 }
424
425 return_ACPI_STATUS (Status);
426 }
427
428
429 /*******************************************************************************
430 *
431 * FUNCTION: AcpiExSystemIoSpaceHandler
432 *
433 * PARAMETERS: Function - Read or Write operation
434 * Address - Where in the space to read or write
435 * BitWidth - Field width in bits (8, 16, or 32)
436 * Value - Pointer to in or out value
437 * HandlerContext - Pointer to Handler's context
438 * RegionContext - Pointer to context specific to the
439 * accessed region
440 *
441 * RETURN: Status
442 *
443 * DESCRIPTION: Handler for the System IO address space (Op Region)
444 *
445 ******************************************************************************/
446
447 ACPI_STATUS
AcpiExSystemIoSpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)448 AcpiExSystemIoSpaceHandler (
449 UINT32 Function,
450 ACPI_PHYSICAL_ADDRESS Address,
451 UINT32 BitWidth,
452 UINT64 *Value,
453 void *HandlerContext,
454 void *RegionContext)
455 {
456 ACPI_STATUS Status = AE_OK;
457 UINT32 Value32;
458
459
460 ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler);
461
462
463 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
464 "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
465 BitWidth, Function, ACPI_FORMAT_UINT64 (Address)));
466
467 /* Decode the function parameter */
468
469 switch (Function)
470 {
471 case ACPI_READ:
472
473 Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address,
474 &Value32, BitWidth);
475 *Value = Value32;
476 break;
477
478 case ACPI_WRITE:
479
480 Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address,
481 (UINT32) *Value, BitWidth);
482 break;
483
484 default:
485
486 Status = AE_BAD_PARAMETER;
487 break;
488 }
489
490 return_ACPI_STATUS (Status);
491 }
492
493
494 /*******************************************************************************
495 *
496 * FUNCTION: AcpiExPciConfigSpaceHandler
497 *
498 * PARAMETERS: Function - Read or Write operation
499 * Address - Where in the space to read or write
500 * BitWidth - Field width in bits (8, 16, or 32)
501 * Value - Pointer to in or out value
502 * HandlerContext - Pointer to Handler's context
503 * RegionContext - Pointer to context specific to the
504 * accessed region
505 *
506 * RETURN: Status
507 *
508 * DESCRIPTION: Handler for the PCI Config address space (Op Region)
509 *
510 ******************************************************************************/
511
512 ACPI_STATUS
AcpiExPciConfigSpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)513 AcpiExPciConfigSpaceHandler (
514 UINT32 Function,
515 ACPI_PHYSICAL_ADDRESS Address,
516 UINT32 BitWidth,
517 UINT64 *Value,
518 void *HandlerContext,
519 void *RegionContext)
520 {
521 ACPI_STATUS Status = AE_OK;
522 ACPI_PCI_ID *PciId;
523 UINT16 PciRegister;
524
525
526 ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler);
527
528
529 /*
530 * The arguments to AcpiOs(Read|Write)PciConfiguration are:
531 *
532 * PciSegment is the PCI bus segment range 0-31
533 * PciBus is the PCI bus number range 0-255
534 * PciDevice is the PCI device number range 0-31
535 * PciFunction is the PCI device function number
536 * PciRegister is the Config space register range 0-255 bytes
537 *
538 * Value - input value for write, output address for read
539 *
540 */
541 PciId = (ACPI_PCI_ID *) RegionContext;
542 PciRegister = (UINT16) (UINT32) Address;
543
544 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
545 "Pci-Config %u (%u) Seg(%04x) Bus(%04x) "
546 "Dev(%04x) Func(%04x) Reg(%04x)\n",
547 Function, BitWidth, PciId->Segment, PciId->Bus, PciId->Device,
548 PciId->Function, PciRegister));
549
550 switch (Function)
551 {
552 case ACPI_READ:
553
554 *Value = 0;
555 Status = AcpiOsReadPciConfiguration (
556 PciId, PciRegister, Value, BitWidth);
557 break;
558
559 case ACPI_WRITE:
560
561 Status = AcpiOsWritePciConfiguration (
562 PciId, PciRegister, *Value, BitWidth);
563 break;
564
565 default:
566
567 Status = AE_BAD_PARAMETER;
568 break;
569 }
570
571 return_ACPI_STATUS (Status);
572 }
573
574
575 /*******************************************************************************
576 *
577 * FUNCTION: AcpiExCmosSpaceHandler
578 *
579 * PARAMETERS: Function - Read or Write operation
580 * Address - Where in the space to read or write
581 * BitWidth - Field width in bits (8, 16, or 32)
582 * Value - Pointer to in or out value
583 * HandlerContext - Pointer to Handler's context
584 * RegionContext - Pointer to context specific to the
585 * accessed region
586 *
587 * RETURN: Status
588 *
589 * DESCRIPTION: Handler for the CMOS address space (Op Region)
590 *
591 ******************************************************************************/
592
593 ACPI_STATUS
AcpiExCmosSpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)594 AcpiExCmosSpaceHandler (
595 UINT32 Function,
596 ACPI_PHYSICAL_ADDRESS Address,
597 UINT32 BitWidth,
598 UINT64 *Value,
599 void *HandlerContext,
600 void *RegionContext)
601 {
602 ACPI_STATUS Status = AE_OK;
603
604
605 ACPI_FUNCTION_TRACE (ExCmosSpaceHandler);
606
607
608 return_ACPI_STATUS (Status);
609 }
610
611
612 /*******************************************************************************
613 *
614 * FUNCTION: AcpiExPciBarSpaceHandler
615 *
616 * PARAMETERS: Function - Read or Write operation
617 * Address - Where in the space to read or write
618 * BitWidth - Field width in bits (8, 16, or 32)
619 * Value - Pointer to in or out value
620 * HandlerContext - Pointer to Handler's context
621 * RegionContext - Pointer to context specific to the
622 * accessed region
623 *
624 * RETURN: Status
625 *
626 * DESCRIPTION: Handler for the PCI BarTarget address space (Op Region)
627 *
628 ******************************************************************************/
629
630 ACPI_STATUS
AcpiExPciBarSpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)631 AcpiExPciBarSpaceHandler (
632 UINT32 Function,
633 ACPI_PHYSICAL_ADDRESS Address,
634 UINT32 BitWidth,
635 UINT64 *Value,
636 void *HandlerContext,
637 void *RegionContext)
638 {
639 ACPI_STATUS Status = AE_OK;
640
641
642 ACPI_FUNCTION_TRACE (ExPciBarSpaceHandler);
643
644
645 return_ACPI_STATUS (Status);
646 }
647
648
649 /*******************************************************************************
650 *
651 * FUNCTION: AcpiExDataTableSpaceHandler
652 *
653 * PARAMETERS: Function - Read or Write operation
654 * Address - Where in the space to read or write
655 * BitWidth - Field width in bits (8, 16, or 32)
656 * Value - Pointer to in or out value
657 * HandlerContext - Pointer to Handler's context
658 * RegionContext - Pointer to context specific to the
659 * accessed region
660 *
661 * RETURN: Status
662 *
663 * DESCRIPTION: Handler for the Data Table address space (Op Region)
664 *
665 ******************************************************************************/
666
667 ACPI_STATUS
AcpiExDataTableSpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)668 AcpiExDataTableSpaceHandler (
669 UINT32 Function,
670 ACPI_PHYSICAL_ADDRESS Address,
671 UINT32 BitWidth,
672 UINT64 *Value,
673 void *HandlerContext,
674 void *RegionContext)
675 {
676 ACPI_DATA_TABLE_MAPPING *Mapping;
677 char *Pointer;
678
679
680 ACPI_FUNCTION_TRACE (ExDataTableSpaceHandler);
681
682
683 Mapping = (ACPI_DATA_TABLE_MAPPING *) RegionContext;
684 Pointer = ACPI_CAST_PTR (char, Mapping->Pointer) +
685 (Address - ACPI_PTR_TO_PHYSADDR (Mapping->Pointer));
686
687 /*
688 * Perform the memory read or write. The BitWidth was already
689 * validated.
690 */
691 switch (Function)
692 {
693 case ACPI_READ:
694
695 memcpy (ACPI_CAST_PTR (char, Value), Pointer, ACPI_DIV_8 (BitWidth));
696 break;
697
698 case ACPI_WRITE:
699
700 memcpy (Pointer, ACPI_CAST_PTR (char, Value), ACPI_DIV_8 (BitWidth));
701 break;
702
703 default:
704
705 return_ACPI_STATUS (AE_BAD_PARAMETER);
706 }
707
708 return_ACPI_STATUS (AE_OK);
709 }
710