1 /******************************************************************************
2 *
3 * Module Name: exregion - ACPI default OpRegion (address space) handlers
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2014, 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 "acpi.h"
45 #include "accommon.h"
46 #include "acinterp.h"
47
48
49 #define _COMPONENT ACPI_EXECUTER
50 ACPI_MODULE_NAME ("exregion")
51
52
53 /*******************************************************************************
54 *
55 * FUNCTION: AcpiExSystemMemorySpaceHandler
56 *
57 * PARAMETERS: Function - Read or Write operation
58 * Address - Where in the space to read or write
59 * BitWidth - Field width in bits (8, 16, or 32)
60 * Value - Pointer to in or out value
61 * HandlerContext - Pointer to Handler's context
62 * RegionContext - Pointer to context specific to the
63 * accessed region
64 *
65 * RETURN: Status
66 *
67 * DESCRIPTION: Handler for the System Memory address space (Op Region)
68 *
69 ******************************************************************************/
70
71 ACPI_STATUS
AcpiExSystemMemorySpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)72 AcpiExSystemMemorySpaceHandler (
73 UINT32 Function,
74 ACPI_PHYSICAL_ADDRESS Address,
75 UINT32 BitWidth,
76 UINT64 *Value,
77 void *HandlerContext,
78 void *RegionContext)
79 {
80 ACPI_STATUS Status = AE_OK;
81 void *LogicalAddrPtr = NULL;
82 ACPI_MEM_SPACE_CONTEXT *MemInfo = RegionContext;
83 UINT32 Length;
84 ACPI_SIZE MapLength;
85 ACPI_SIZE PageBoundaryMapLength;
86 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
87 UINT32 Remainder;
88 #endif
89
90
91 ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);
92
93
94 /* Validate and translate the bit width */
95
96 switch (BitWidth)
97 {
98 case 8:
99
100 Length = 1;
101 break;
102
103 case 16:
104
105 Length = 2;
106 break;
107
108 case 32:
109
110 Length = 4;
111 break;
112
113 case 64:
114
115 Length = 8;
116 break;
117
118 default:
119
120 ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %u",
121 BitWidth));
122 return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
123 }
124
125 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
126 /*
127 * Hardware does not support non-aligned data transfers, we must verify
128 * the request.
129 */
130 (void) AcpiUtShortDivide ((UINT64) Address, Length, NULL, &Remainder);
131 if (Remainder != 0)
132 {
133 return_ACPI_STATUS (AE_AML_ALIGNMENT);
134 }
135 #endif
136
137 /*
138 * Does the request fit into the cached memory mapping?
139 * Is 1) Address below the current mapping? OR
140 * 2) Address beyond the current mapping?
141 */
142 if ((Address < MemInfo->MappedPhysicalAddress) ||
143 (((UINT64) Address + Length) >
144 ((UINT64)
145 MemInfo->MappedPhysicalAddress + MemInfo->MappedLength)))
146 {
147 /*
148 * The request cannot be resolved by the current memory mapping;
149 * Delete the existing mapping and create a new one.
150 */
151 if (MemInfo->MappedLength)
152 {
153 /* Valid mapping, delete it */
154
155 AcpiOsUnmapMemory (MemInfo->MappedLogicalAddress,
156 MemInfo->MappedLength);
157 }
158
159 /*
160 * October 2009: Attempt to map from the requested address to the
161 * end of the region. However, we will never map more than one
162 * page, nor will we cross a page boundary.
163 */
164 MapLength = (ACPI_SIZE)
165 ((MemInfo->Address + MemInfo->Length) - Address);
166
167 /*
168 * If mapping the entire remaining portion of the region will cross
169 * a page boundary, just map up to the page boundary, do not cross.
170 * On some systems, crossing a page boundary while mapping regions
171 * can cause warnings if the pages have different attributes
172 * due to resource management.
173 *
174 * This has the added benefit of constraining a single mapping to
175 * one page, which is similar to the original code that used a 4k
176 * maximum window.
177 */
178 PageBoundaryMapLength =
179 ACPI_ROUND_UP (Address, ACPI_DEFAULT_PAGE_SIZE) - Address;
180 if (PageBoundaryMapLength == 0)
181 {
182 PageBoundaryMapLength = ACPI_DEFAULT_PAGE_SIZE;
183 }
184
185 if (MapLength > PageBoundaryMapLength)
186 {
187 MapLength = PageBoundaryMapLength;
188 }
189
190 /* Create a new mapping starting at the address given */
191
192 MemInfo->MappedLogicalAddress = AcpiOsMapMemory (
193 (ACPI_PHYSICAL_ADDRESS) Address, MapLength);
194 if (!MemInfo->MappedLogicalAddress)
195 {
196 ACPI_ERROR ((AE_INFO,
197 "Could not map memory at 0x%8.8X%8.8X, size %u",
198 ACPI_FORMAT_NATIVE_UINT (Address), (UINT32) MapLength));
199 MemInfo->MappedLength = 0;
200 return_ACPI_STATUS (AE_NO_MEMORY);
201 }
202
203 /* Save the physical address and mapping size */
204
205 MemInfo->MappedPhysicalAddress = Address;
206 MemInfo->MappedLength = MapLength;
207 }
208
209 /*
210 * Generate a logical pointer corresponding to the address we want to
211 * access
212 */
213 LogicalAddrPtr = MemInfo->MappedLogicalAddress +
214 ((UINT64) Address - (UINT64) MemInfo->MappedPhysicalAddress);
215
216 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
217 "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
218 BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));
219
220 /*
221 * Perform the memory read or write
222 *
223 * Note: For machines that do not support non-aligned transfers, the target
224 * address was checked for alignment above. We do not attempt to break the
225 * transfer up into smaller (byte-size) chunks because the AML specifically
226 * asked for a transfer width that the hardware may require.
227 */
228 switch (Function)
229 {
230 case ACPI_READ:
231
232 *Value = 0;
233 switch (BitWidth)
234 {
235 case 8:
236
237 *Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);
238 break;
239
240 case 16:
241
242 *Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);
243 break;
244
245 case 32:
246
247 *Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);
248 break;
249
250 case 64:
251
252 *Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);
253 break;
254
255 default:
256
257 /* BitWidth was already validated */
258
259 break;
260 }
261 break;
262
263 case ACPI_WRITE:
264
265 switch (BitWidth)
266 {
267 case 8:
268
269 ACPI_SET8 (LogicalAddrPtr, *Value);
270 break;
271
272 case 16:
273
274 ACPI_SET16 (LogicalAddrPtr, *Value);
275 break;
276
277 case 32:
278
279 ACPI_SET32 (LogicalAddrPtr, *Value);
280 break;
281
282 case 64:
283
284 ACPI_SET64 (LogicalAddrPtr, *Value);
285 break;
286
287 default:
288
289 /* BitWidth was already validated */
290
291 break;
292 }
293 break;
294
295 default:
296
297 Status = AE_BAD_PARAMETER;
298 break;
299 }
300
301 return_ACPI_STATUS (Status);
302 }
303
304
305 /*******************************************************************************
306 *
307 * FUNCTION: AcpiExSystemIoSpaceHandler
308 *
309 * PARAMETERS: Function - Read or Write operation
310 * Address - Where in the space to read or write
311 * BitWidth - Field width in bits (8, 16, or 32)
312 * Value - Pointer to in or out value
313 * HandlerContext - Pointer to Handler's context
314 * RegionContext - Pointer to context specific to the
315 * accessed region
316 *
317 * RETURN: Status
318 *
319 * DESCRIPTION: Handler for the System IO address space (Op Region)
320 *
321 ******************************************************************************/
322
323 ACPI_STATUS
AcpiExSystemIoSpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)324 AcpiExSystemIoSpaceHandler (
325 UINT32 Function,
326 ACPI_PHYSICAL_ADDRESS Address,
327 UINT32 BitWidth,
328 UINT64 *Value,
329 void *HandlerContext,
330 void *RegionContext)
331 {
332 ACPI_STATUS Status = AE_OK;
333 UINT32 Value32;
334
335
336 ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler);
337
338
339 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
340 "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
341 BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));
342
343 /* Decode the function parameter */
344
345 switch (Function)
346 {
347 case ACPI_READ:
348
349 Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address,
350 &Value32, BitWidth);
351 *Value = Value32;
352 break;
353
354 case ACPI_WRITE:
355
356 Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address,
357 (UINT32) *Value, BitWidth);
358 break;
359
360 default:
361
362 Status = AE_BAD_PARAMETER;
363 break;
364 }
365
366 return_ACPI_STATUS (Status);
367 }
368
369
370 /*******************************************************************************
371 *
372 * FUNCTION: AcpiExPciConfigSpaceHandler
373 *
374 * PARAMETERS: Function - Read or Write operation
375 * Address - Where in the space to read or write
376 * BitWidth - Field width in bits (8, 16, or 32)
377 * Value - Pointer to in or out value
378 * HandlerContext - Pointer to Handler's context
379 * RegionContext - Pointer to context specific to the
380 * accessed region
381 *
382 * RETURN: Status
383 *
384 * DESCRIPTION: Handler for the PCI Config address space (Op Region)
385 *
386 ******************************************************************************/
387
388 ACPI_STATUS
AcpiExPciConfigSpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)389 AcpiExPciConfigSpaceHandler (
390 UINT32 Function,
391 ACPI_PHYSICAL_ADDRESS Address,
392 UINT32 BitWidth,
393 UINT64 *Value,
394 void *HandlerContext,
395 void *RegionContext)
396 {
397 ACPI_STATUS Status = AE_OK;
398 ACPI_PCI_ID *PciId;
399 UINT16 PciRegister;
400
401
402 ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler);
403
404
405 /*
406 * The arguments to AcpiOs(Read|Write)PciConfiguration are:
407 *
408 * PciSegment is the PCI bus segment range 0-31
409 * PciBus is the PCI bus number range 0-255
410 * PciDevice is the PCI device number range 0-31
411 * PciFunction is the PCI device function number
412 * PciRegister is the Config space register range 0-255 bytes
413 *
414 * Value - input value for write, output address for read
415 *
416 */
417 PciId = (ACPI_PCI_ID *) RegionContext;
418 PciRegister = (UINT16) (UINT32) Address;
419
420 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
421 "Pci-Config %u (%u) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
422 Function, BitWidth, PciId->Segment, PciId->Bus, PciId->Device,
423 PciId->Function, PciRegister));
424
425 switch (Function)
426 {
427 case ACPI_READ:
428
429 *Value = 0;
430 Status = AcpiOsReadPciConfiguration (PciId, PciRegister,
431 Value, BitWidth);
432 break;
433
434 case ACPI_WRITE:
435
436 Status = AcpiOsWritePciConfiguration (PciId, PciRegister,
437 *Value, BitWidth);
438 break;
439
440 default:
441
442 Status = AE_BAD_PARAMETER;
443 break;
444 }
445
446 return_ACPI_STATUS (Status);
447 }
448
449
450 /*******************************************************************************
451 *
452 * FUNCTION: AcpiExCmosSpaceHandler
453 *
454 * PARAMETERS: Function - Read or Write operation
455 * Address - Where in the space to read or write
456 * BitWidth - Field width in bits (8, 16, or 32)
457 * Value - Pointer to in or out value
458 * HandlerContext - Pointer to Handler's context
459 * RegionContext - Pointer to context specific to the
460 * accessed region
461 *
462 * RETURN: Status
463 *
464 * DESCRIPTION: Handler for the CMOS address space (Op Region)
465 *
466 ******************************************************************************/
467
468 ACPI_STATUS
AcpiExCmosSpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)469 AcpiExCmosSpaceHandler (
470 UINT32 Function,
471 ACPI_PHYSICAL_ADDRESS Address,
472 UINT32 BitWidth,
473 UINT64 *Value,
474 void *HandlerContext,
475 void *RegionContext)
476 {
477 ACPI_STATUS Status = AE_OK;
478
479
480 ACPI_FUNCTION_TRACE (ExCmosSpaceHandler);
481
482
483 return_ACPI_STATUS (Status);
484 }
485
486
487 /*******************************************************************************
488 *
489 * FUNCTION: AcpiExPciBarSpaceHandler
490 *
491 * PARAMETERS: Function - Read or Write operation
492 * Address - Where in the space to read or write
493 * BitWidth - Field width in bits (8, 16, or 32)
494 * Value - Pointer to in or out value
495 * HandlerContext - Pointer to Handler's context
496 * RegionContext - Pointer to context specific to the
497 * accessed region
498 *
499 * RETURN: Status
500 *
501 * DESCRIPTION: Handler for the PCI BarTarget address space (Op Region)
502 *
503 ******************************************************************************/
504
505 ACPI_STATUS
AcpiExPciBarSpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)506 AcpiExPciBarSpaceHandler (
507 UINT32 Function,
508 ACPI_PHYSICAL_ADDRESS Address,
509 UINT32 BitWidth,
510 UINT64 *Value,
511 void *HandlerContext,
512 void *RegionContext)
513 {
514 ACPI_STATUS Status = AE_OK;
515
516
517 ACPI_FUNCTION_TRACE (ExPciBarSpaceHandler);
518
519
520 return_ACPI_STATUS (Status);
521 }
522
523
524 /*******************************************************************************
525 *
526 * FUNCTION: AcpiExDataTableSpaceHandler
527 *
528 * PARAMETERS: Function - Read or Write operation
529 * Address - Where in the space to read or write
530 * BitWidth - Field width in bits (8, 16, or 32)
531 * Value - Pointer to in or out value
532 * HandlerContext - Pointer to Handler's context
533 * RegionContext - Pointer to context specific to the
534 * accessed region
535 *
536 * RETURN: Status
537 *
538 * DESCRIPTION: Handler for the Data Table address space (Op Region)
539 *
540 ******************************************************************************/
541
542 ACPI_STATUS
AcpiExDataTableSpaceHandler(UINT32 Function,ACPI_PHYSICAL_ADDRESS Address,UINT32 BitWidth,UINT64 * Value,void * HandlerContext,void * RegionContext)543 AcpiExDataTableSpaceHandler (
544 UINT32 Function,
545 ACPI_PHYSICAL_ADDRESS Address,
546 UINT32 BitWidth,
547 UINT64 *Value,
548 void *HandlerContext,
549 void *RegionContext)
550 {
551 ACPI_FUNCTION_TRACE (ExDataTableSpaceHandler);
552
553
554 /*
555 * Perform the memory read or write. The BitWidth was already
556 * validated.
557 */
558 switch (Function)
559 {
560 case ACPI_READ:
561
562 ACPI_MEMCPY (ACPI_CAST_PTR (char, Value), ACPI_PHYSADDR_TO_PTR (Address),
563 ACPI_DIV_8 (BitWidth));
564 break;
565
566 case ACPI_WRITE:
567
568 ACPI_MEMCPY (ACPI_PHYSADDR_TO_PTR (Address), ACPI_CAST_PTR (char, Value),
569 ACPI_DIV_8 (BitWidth));
570 break;
571
572 default:
573
574 return_ACPI_STATUS (AE_BAD_PARAMETER);
575 }
576
577 return_ACPI_STATUS (AE_OK);
578 }
579