1 | /****************************************************************************** |
2 | * |
3 | * Module Name: exregion - ACPI default OpRegion (address space) handlers |
4 | * |
5 | *****************************************************************************/ |
6 | |
7 | /* |
8 | * Copyright (C) 2000 - 2016, 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 |
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 = (ACPI_SIZE) |
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 (Address, MapLength); |
193 | if (!MemInfo->MappedLogicalAddress) |
194 | { |
195 | ACPI_ERROR ((AE_INFO, |
196 | "Could not map memory at 0x%8.8X%8.8X, size %u" , |
197 | ACPI_FORMAT_UINT64 (Address), (UINT32) MapLength)); |
198 | MemInfo->MappedLength = 0; |
199 | return_ACPI_STATUS (AE_NO_MEMORY); |
200 | } |
201 | |
202 | /* Save the physical address and mapping size */ |
203 | |
204 | MemInfo->MappedPhysicalAddress = Address; |
205 | MemInfo->MappedLength = MapLength; |
206 | } |
207 | |
208 | /* |
209 | * Generate a logical pointer corresponding to the address we want to |
210 | * access |
211 | */ |
212 | LogicalAddrPtr = MemInfo->MappedLogicalAddress + |
213 | ((UINT64) Address - (UINT64) MemInfo->MappedPhysicalAddress); |
214 | |
215 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
216 | "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n" , |
217 | BitWidth, Function, ACPI_FORMAT_UINT64 (Address))); |
218 | |
219 | /* |
220 | * Perform the memory read or write |
221 | * |
222 | * Note: For machines that do not support non-aligned transfers, the target |
223 | * address was checked for alignment above. We do not attempt to break the |
224 | * transfer up into smaller (byte-size) chunks because the AML specifically |
225 | * asked for a transfer width that the hardware may require. |
226 | */ |
227 | switch (Function) |
228 | { |
229 | case ACPI_READ: |
230 | |
231 | *Value = 0; |
232 | switch (BitWidth) |
233 | { |
234 | case 8: |
235 | |
236 | *Value = (UINT64) ACPI_GET8 (LogicalAddrPtr); |
237 | break; |
238 | |
239 | case 16: |
240 | |
241 | *Value = (UINT64) ACPI_GET16 (LogicalAddrPtr); |
242 | break; |
243 | |
244 | case 32: |
245 | |
246 | *Value = (UINT64) ACPI_GET32 (LogicalAddrPtr); |
247 | break; |
248 | |
249 | case 64: |
250 | |
251 | *Value = (UINT64) ACPI_GET64 (LogicalAddrPtr); |
252 | break; |
253 | |
254 | default: |
255 | |
256 | /* BitWidth was already validated */ |
257 | |
258 | break; |
259 | } |
260 | break; |
261 | |
262 | case ACPI_WRITE: |
263 | |
264 | switch (BitWidth) |
265 | { |
266 | case 8: |
267 | |
268 | ACPI_SET8 (LogicalAddrPtr, *Value); |
269 | break; |
270 | |
271 | case 16: |
272 | |
273 | ACPI_SET16 (LogicalAddrPtr, *Value); |
274 | break; |
275 | |
276 | case 32: |
277 | |
278 | ACPI_SET32 (LogicalAddrPtr, *Value); |
279 | break; |
280 | |
281 | case 64: |
282 | |
283 | ACPI_SET64 (LogicalAddrPtr, *Value); |
284 | break; |
285 | |
286 | default: |
287 | |
288 | /* BitWidth was already validated */ |
289 | |
290 | break; |
291 | } |
292 | break; |
293 | |
294 | default: |
295 | |
296 | Status = AE_BAD_PARAMETER; |
297 | break; |
298 | } |
299 | |
300 | return_ACPI_STATUS (Status); |
301 | } |
302 | |
303 | |
304 | /******************************************************************************* |
305 | * |
306 | * FUNCTION: AcpiExSystemIoSpaceHandler |
307 | * |
308 | * PARAMETERS: Function - Read or Write operation |
309 | * Address - Where in the space to read or write |
310 | * BitWidth - Field width in bits (8, 16, or 32) |
311 | * Value - Pointer to in or out value |
312 | * HandlerContext - Pointer to Handler's context |
313 | * RegionContext - Pointer to context specific to the |
314 | * accessed region |
315 | * |
316 | * RETURN: Status |
317 | * |
318 | * DESCRIPTION: Handler for the System IO address space (Op Region) |
319 | * |
320 | ******************************************************************************/ |
321 | |
322 | ACPI_STATUS |
323 | AcpiExSystemIoSpaceHandler ( |
324 | UINT32 Function, |
325 | ACPI_PHYSICAL_ADDRESS Address, |
326 | UINT32 BitWidth, |
327 | UINT64 *Value, |
328 | void *HandlerContext, |
329 | void *RegionContext) |
330 | { |
331 | ACPI_STATUS Status = AE_OK; |
332 | UINT32 Value32; |
333 | |
334 | |
335 | ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler); |
336 | |
337 | |
338 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
339 | "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n" , |
340 | BitWidth, Function, ACPI_FORMAT_UINT64 (Address))); |
341 | |
342 | /* Decode the function parameter */ |
343 | |
344 | switch (Function) |
345 | { |
346 | case ACPI_READ: |
347 | |
348 | Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address, |
349 | &Value32, BitWidth); |
350 | *Value = Value32; |
351 | break; |
352 | |
353 | case ACPI_WRITE: |
354 | |
355 | Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address, |
356 | (UINT32) *Value, BitWidth); |
357 | break; |
358 | |
359 | default: |
360 | |
361 | Status = AE_BAD_PARAMETER; |
362 | break; |
363 | } |
364 | |
365 | return_ACPI_STATUS (Status); |
366 | } |
367 | |
368 | |
369 | /******************************************************************************* |
370 | * |
371 | * FUNCTION: AcpiExPciConfigSpaceHandler |
372 | * |
373 | * PARAMETERS: Function - Read or Write operation |
374 | * Address - Where in the space to read or write |
375 | * BitWidth - Field width in bits (8, 16, or 32) |
376 | * Value - Pointer to in or out value |
377 | * HandlerContext - Pointer to Handler's context |
378 | * RegionContext - Pointer to context specific to the |
379 | * accessed region |
380 | * |
381 | * RETURN: Status |
382 | * |
383 | * DESCRIPTION: Handler for the PCI Config address space (Op Region) |
384 | * |
385 | ******************************************************************************/ |
386 | |
387 | ACPI_STATUS |
388 | AcpiExPciConfigSpaceHandler ( |
389 | UINT32 Function, |
390 | ACPI_PHYSICAL_ADDRESS Address, |
391 | UINT32 BitWidth, |
392 | UINT64 *Value, |
393 | void *HandlerContext, |
394 | void *RegionContext) |
395 | { |
396 | ACPI_STATUS Status = AE_OK; |
397 | ACPI_PCI_ID *PciId; |
398 | UINT16 PciRegister; |
399 | |
400 | |
401 | ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler); |
402 | |
403 | |
404 | /* |
405 | * The arguments to AcpiOs(Read|Write)PciConfiguration are: |
406 | * |
407 | * PciSegment is the PCI bus segment range 0-31 |
408 | * PciBus is the PCI bus number range 0-255 |
409 | * PciDevice is the PCI device number range 0-31 |
410 | * PciFunction is the PCI device function number |
411 | * PciRegister is the Config space register range 0-255 bytes |
412 | * |
413 | * Value - input value for write, output address for read |
414 | * |
415 | */ |
416 | PciId = (ACPI_PCI_ID *) RegionContext; |
417 | PciRegister = (UINT16) (UINT32) Address; |
418 | |
419 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
420 | "Pci-Config %u (%u) Seg(%04x) Bus(%04x) " |
421 | "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 ( |
431 | PciId, PciRegister, Value, BitWidth); |
432 | break; |
433 | |
434 | case ACPI_WRITE: |
435 | |
436 | Status = AcpiOsWritePciConfiguration ( |
437 | PciId, PciRegister, *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 |
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 |
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 |
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 | 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 | 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 | |