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 - 2023, 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
AeRegionHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)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
