1 /******************************************************************************
3 * Module Name: exregion - ACPI default OpRegion (address space) handlers
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2014, Intel Corp.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
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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
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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 =
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 (
193 (ACPI_PHYSICAL_ADDRESS) Address, MapLength);
194 if (!MemInfo->MappedLogicalAddress)
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);
203 /* Save the physical address and mapping size */
205 MemInfo->MappedPhysicalAddress = Address;
206 MemInfo->MappedLength = MapLength;
210 * Generate a logical pointer corresponding to the address we want to
213 LogicalAddrPtr = MemInfo->MappedLogicalAddress +
214 ((UINT64) Address - (UINT64) MemInfo->MappedPhysicalAddress);
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)));
221 * Perform the memory read or write
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.
237 *Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);
242 *Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);
247 *Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);
252 *Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);
257 /* BitWidth was already validated */
269 ACPI_SET8 (LogicalAddrPtr, *Value);
274 ACPI_SET16 (LogicalAddrPtr, *Value);
279 ACPI_SET32 (LogicalAddrPtr, *Value);
284 ACPI_SET64 (LogicalAddrPtr, *Value);
289 /* BitWidth was already validated */
297 Status = AE_BAD_PARAMETER;
301 return_ACPI_STATUS (Status);
305 /*******************************************************************************
307 * FUNCTION: AcpiExSystemIoSpaceHandler
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
319 * DESCRIPTION: Handler for the System IO address space (Op Region)
321 ******************************************************************************/
324 AcpiExSystemIoSpaceHandler (
326 ACPI_PHYSICAL_ADDRESS Address,
329 void *HandlerContext,
332 ACPI_STATUS Status = AE_OK;
336 ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler);
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)));
343 /* Decode the function parameter */
349 Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address,
356 Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address,
357 (UINT32) *Value, BitWidth);
362 Status = AE_BAD_PARAMETER;
366 return_ACPI_STATUS (Status);
370 /*******************************************************************************
372 * FUNCTION: AcpiExPciConfigSpaceHandler
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
384 * DESCRIPTION: Handler for the PCI Config address space (Op Region)
386 ******************************************************************************/
389 AcpiExPciConfigSpaceHandler (
391 ACPI_PHYSICAL_ADDRESS Address,
394 void *HandlerContext,
397 ACPI_STATUS Status = AE_OK;
402 ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler);
406 * The arguments to AcpiOs(Read|Write)PciConfiguration are:
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
414 * Value - input value for write, output address for read
417 PciId = (ACPI_PCI_ID *) RegionContext;
418 PciRegister = (UINT16) (UINT32) Address;
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));
430 Status = AcpiOsReadPciConfiguration (PciId, PciRegister,
436 Status = AcpiOsWritePciConfiguration (PciId, PciRegister,
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 ACPI_MEMCPY (ACPI_CAST_PTR (char, Value), ACPI_PHYSADDR_TO_PTR (Address),
563 ACPI_DIV_8 (BitWidth));
568 ACPI_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);