1 /******************************************************************************
3 * Module Name: exregion - ACPI default OpRegion (address space) handlers
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2018, Intel Corp.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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.
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
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37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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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.
49 #define _COMPONENT ACPI_EXECUTER
50 ACPI_MODULE_NAME ("exregion")
53 /*******************************************************************************
55 * FUNCTION: AcpiExSystemMemorySpaceHandler
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
67 * DESCRIPTION: Handler for the System Memory address space (Op Region)
69 ******************************************************************************/
72 AcpiExSystemMemorySpaceHandler (
74 ACPI_PHYSICAL_ADDRESS Address
,
80 ACPI_STATUS Status
= AE_OK
;
81 void *LogicalAddrPtr
= NULL
;
82 ACPI_MEM_SPACE_CONTEXT
*MemInfo
= RegionContext
;
85 ACPI_SIZE PageBoundaryMapLength
;
86 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
91 ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler
);
94 /* Validate and translate the bit width */
120 ACPI_ERROR ((AE_INFO
, "Invalid SystemMemory width %u",
122 return_ACPI_STATUS (AE_AML_OPERAND_VALUE
);
125 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
127 * Hardware does not support non-aligned data transfers, we must verify
130 (void) AcpiUtShortDivide ((UINT64
) Address
, Length
, NULL
, &Remainder
);
133 return_ACPI_STATUS (AE_AML_ALIGNMENT
);
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?
142 if ((Address
< MemInfo
->MappedPhysicalAddress
) ||
143 (((UINT64
) Address
+ Length
) >
145 MemInfo
->MappedPhysicalAddress
+ MemInfo
->MappedLength
)))
148 * The request cannot be resolved by the current memory mapping;
149 * Delete the existing mapping and create a new one.
151 if (MemInfo
->MappedLength
)
153 /* Valid mapping, delete it */
155 AcpiOsUnmapMemory (MemInfo
->MappedLogicalAddress
,
156 MemInfo
->MappedLength
);
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.
164 MapLength
= (ACPI_SIZE
)
165 ((MemInfo
->Address
+ MemInfo
->Length
) - Address
);
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.
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
178 PageBoundaryMapLength
= (ACPI_SIZE
)
179 (ACPI_ROUND_UP (Address
, ACPI_DEFAULT_PAGE_SIZE
) - Address
);
180 if (PageBoundaryMapLength
== 0)
182 PageBoundaryMapLength
= ACPI_DEFAULT_PAGE_SIZE
;
185 if (MapLength
> PageBoundaryMapLength
)
187 MapLength
= PageBoundaryMapLength
;
190 /* Create a new mapping starting at the address given */
192 MemInfo
->MappedLogicalAddress
= AcpiOsMapMemory (Address
, MapLength
);
193 if (!MemInfo
->MappedLogicalAddress
)
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
);
202 /* Save the physical address and mapping size */
204 MemInfo
->MappedPhysicalAddress
= Address
;
205 MemInfo
->MappedLength
= MapLength
;
209 * Generate a logical pointer corresponding to the address we want to
212 LogicalAddrPtr
= MemInfo
->MappedLogicalAddress
+
213 ((UINT64
) Address
- (UINT64
) MemInfo
->MappedPhysicalAddress
);
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
)));
220 * Perform the memory read or write
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.
236 *Value
= (UINT64
) ACPI_GET8 (LogicalAddrPtr
);
241 *Value
= (UINT64
) ACPI_GET16 (LogicalAddrPtr
);
246 *Value
= (UINT64
) ACPI_GET32 (LogicalAddrPtr
);
251 *Value
= (UINT64
) ACPI_GET64 (LogicalAddrPtr
);
256 /* BitWidth was already validated */
268 ACPI_SET8 (LogicalAddrPtr
, *Value
);
273 ACPI_SET16 (LogicalAddrPtr
, *Value
);
278 ACPI_SET32 (LogicalAddrPtr
, *Value
);
283 ACPI_SET64 (LogicalAddrPtr
, *Value
);
288 /* BitWidth was already validated */
296 Status
= AE_BAD_PARAMETER
;
300 return_ACPI_STATUS (Status
);
304 /*******************************************************************************
306 * FUNCTION: AcpiExSystemIoSpaceHandler
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
318 * DESCRIPTION: Handler for the System IO address space (Op Region)
320 ******************************************************************************/
323 AcpiExSystemIoSpaceHandler (
325 ACPI_PHYSICAL_ADDRESS Address
,
328 void *HandlerContext
,
331 ACPI_STATUS Status
= AE_OK
;
335 ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler
);
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
)));
342 /* Decode the function parameter */
348 Status
= AcpiHwReadPort ((ACPI_IO_ADDRESS
) Address
,
355 Status
= AcpiHwWritePort ((ACPI_IO_ADDRESS
) Address
,
356 (UINT32
) *Value
, BitWidth
);
361 Status
= AE_BAD_PARAMETER
;
365 return_ACPI_STATUS (Status
);
369 /*******************************************************************************
371 * FUNCTION: AcpiExPciConfigSpaceHandler
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
383 * DESCRIPTION: Handler for the PCI Config address space (Op Region)
385 ******************************************************************************/
388 AcpiExPciConfigSpaceHandler (
390 ACPI_PHYSICAL_ADDRESS Address
,
393 void *HandlerContext
,
396 ACPI_STATUS Status
= AE_OK
;
401 ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler
);
405 * The arguments to AcpiOs(Read|Write)PciConfiguration are:
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
413 * Value - input value for write, output address for read
416 PciId
= (ACPI_PCI_ID
*) RegionContext
;
417 PciRegister
= (UINT16
) (UINT32
) Address
;
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
));
430 Status
= AcpiOsReadPciConfiguration (
431 PciId
, PciRegister
, Value
, BitWidth
);
436 Status
= AcpiOsWritePciConfiguration (
437 PciId
, PciRegister
, *Value
, BitWidth
);
442 Status
= AE_BAD_PARAMETER
;
446 return_ACPI_STATUS (Status
);
450 /*******************************************************************************
452 * FUNCTION: AcpiExCmosSpaceHandler
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
464 * DESCRIPTION: Handler for the CMOS address space (Op Region)
466 ******************************************************************************/
469 AcpiExCmosSpaceHandler (
471 ACPI_PHYSICAL_ADDRESS Address
,
474 void *HandlerContext
,
477 ACPI_STATUS Status
= AE_OK
;
480 ACPI_FUNCTION_TRACE (ExCmosSpaceHandler
);
483 return_ACPI_STATUS (Status
);
487 /*******************************************************************************
489 * FUNCTION: AcpiExPciBarSpaceHandler
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
501 * DESCRIPTION: Handler for the PCI BarTarget address space (Op Region)
503 ******************************************************************************/
506 AcpiExPciBarSpaceHandler (
508 ACPI_PHYSICAL_ADDRESS Address
,
511 void *HandlerContext
,
514 ACPI_STATUS Status
= AE_OK
;
517 ACPI_FUNCTION_TRACE (ExPciBarSpaceHandler
);
520 return_ACPI_STATUS (Status
);
524 /*******************************************************************************
526 * FUNCTION: AcpiExDataTableSpaceHandler
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
538 * DESCRIPTION: Handler for the Data Table address space (Op Region)
540 ******************************************************************************/
543 AcpiExDataTableSpaceHandler (
545 ACPI_PHYSICAL_ADDRESS Address
,
548 void *HandlerContext
,
551 ACPI_FUNCTION_TRACE (ExDataTableSpaceHandler
);
555 * Perform the memory read or write. The BitWidth was already
562 memcpy (ACPI_CAST_PTR (char, Value
), ACPI_PHYSADDR_TO_PTR (Address
),
563 ACPI_DIV_8 (BitWidth
));
568 memcpy (ACPI_PHYSADDR_TO_PTR (Address
), ACPI_CAST_PTR (char, Value
),
569 ACPI_DIV_8 (BitWidth
));
574 return_ACPI_STATUS (AE_BAD_PARAMETER
);
577 return_ACPI_STATUS (AE_OK
);