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minix3/drivers/power/acpi/executer/exregion.c

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/******************************************************************************
*
* Module Name: exregion - ACPI default OpRegion (address space) handlers
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __EXREGION_C__
#include "acpi.h"
#include "accommon.h"
#include "acinterp.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exregion")
/*******************************************************************************
*
* FUNCTION: AcpiExSystemMemorySpaceHandler
*
* PARAMETERS: Function - Read or Write operation
* Address - Where in the space to read or write
* BitWidth - Field width in bits (8, 16, or 32)
* Value - Pointer to in or out value
* HandlerContext - Pointer to Handler's context
* RegionContext - Pointer to context specific to the
* accessed region
*
* RETURN: Status
*
* DESCRIPTION: Handler for the System Memory address space (Op Region)
*
******************************************************************************/
ACPI_STATUS
AcpiExSystemMemorySpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
void *LogicalAddrPtr = NULL;
ACPI_MEM_SPACE_CONTEXT *MemInfo = RegionContext;
UINT32 Length;
ACPI_SIZE MapLength;
ACPI_SIZE PageBoundaryMapLength;
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
UINT32 Remainder;
#endif
ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);
/* Validate and translate the bit width */
switch (BitWidth)
{
case 8:
Length = 1;
break;
case 16:
Length = 2;
break;
case 32:
Length = 4;
break;
case 64:
Length = 8;
break;
default:
ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %u",
BitWidth));
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
}
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
/*
* Hardware does not support non-aligned data transfers, we must verify
* the request.
*/
(void) AcpiUtShortDivide ((UINT64) Address, Length, NULL, &Remainder);
if (Remainder != 0)
{
return_ACPI_STATUS (AE_AML_ALIGNMENT);
}
#endif
/*
* Does the request fit into the cached memory mapping?
* Is 1) Address below the current mapping? OR
* 2) Address beyond the current mapping?
*/
if ((Address < MemInfo->MappedPhysicalAddress) ||
(((UINT64) Address + Length) >
((UINT64)
MemInfo->MappedPhysicalAddress + MemInfo->MappedLength)))
{
/*
* The request cannot be resolved by the current memory mapping;
* Delete the existing mapping and create a new one.
*/
if (MemInfo->MappedLength)
{
/* Valid mapping, delete it */
AcpiOsUnmapMemory (MemInfo->MappedLogicalAddress,
MemInfo->MappedLength);
}
/*
* October 2009: Attempt to map from the requested address to the
* end of the region. However, we will never map more than one
* page, nor will we cross a page boundary.
*/
MapLength = (ACPI_SIZE)
((MemInfo->Address + MemInfo->Length) - Address);
/*
* If mapping the entire remaining portion of the region will cross
* a page boundary, just map up to the page boundary, do not cross.
* On some systems, crossing a page boundary while mapping regions
* can cause warnings if the pages have different attributes
* due to resource management.
*
* This has the added benefit of constraining a single mapping to
* one page, which is similar to the original code that used a 4k
* maximum window.
*/
PageBoundaryMapLength =
ACPI_ROUND_UP (Address, ACPI_DEFAULT_PAGE_SIZE) - Address;
if (PageBoundaryMapLength == 0)
{
PageBoundaryMapLength = ACPI_DEFAULT_PAGE_SIZE;
}
if (MapLength > PageBoundaryMapLength)
{
MapLength = PageBoundaryMapLength;
}
/* Create a new mapping starting at the address given */
MemInfo->MappedLogicalAddress = AcpiOsMapMemory (
(ACPI_PHYSICAL_ADDRESS) Address, MapLength);
if (!MemInfo->MappedLogicalAddress)
{
ACPI_ERROR ((AE_INFO,
"Could not map memory at 0x%8.8X%8.8X, size %u",
ACPI_FORMAT_NATIVE_UINT (Address), (UINT32) MapLength));
MemInfo->MappedLength = 0;
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Save the physical address and mapping size */
MemInfo->MappedPhysicalAddress = Address;
MemInfo->MappedLength = MapLength;
}
/*
* Generate a logical pointer corresponding to the address we want to
* access
*/
LogicalAddrPtr = MemInfo->MappedLogicalAddress +
((UINT64) Address - (UINT64) MemInfo->MappedPhysicalAddress);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));
/*
* Perform the memory read or write
*
* Note: For machines that do not support non-aligned transfers, the target
* address was checked for alignment above. We do not attempt to break the
* transfer up into smaller (byte-size) chunks because the AML specifically
* asked for a transfer width that the hardware may require.
*/
switch (Function)
{
case ACPI_READ:
*Value = 0;
switch (BitWidth)
{
case 8:
*Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);
break;
case 16:
*Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);
break;
case 32:
*Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);
break;
case 64:
*Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);
break;
default:
/* BitWidth was already validated */
break;
}
break;
case ACPI_WRITE:
switch (BitWidth)
{
case 8:
ACPI_SET8 (LogicalAddrPtr) = (UINT8) *Value;
break;
case 16:
ACPI_SET16 (LogicalAddrPtr) = (UINT16) *Value;
break;
case 32:
ACPI_SET32 ( LogicalAddrPtr) = (UINT32) *Value;
break;
case 64:
ACPI_SET64 (LogicalAddrPtr) = (UINT64) *Value;
break;
default:
/* BitWidth was already validated */
break;
}
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExSystemIoSpaceHandler
*
* PARAMETERS: Function - Read or Write operation
* Address - Where in the space to read or write
* BitWidth - Field width in bits (8, 16, or 32)
* Value - Pointer to in or out value
* HandlerContext - Pointer to Handler's context
* RegionContext - Pointer to context specific to the
* accessed region
*
* RETURN: Status
*
* DESCRIPTION: Handler for the System IO address space (Op Region)
*
******************************************************************************/
ACPI_STATUS
AcpiExSystemIoSpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
UINT32 Value32;
ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));
/* Decode the function parameter */
switch (Function)
{
case ACPI_READ:
Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address,
&Value32, BitWidth);
*Value = Value32;
break;
case ACPI_WRITE:
Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address,
(UINT32) *Value, BitWidth);
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExPciConfigSpaceHandler
*
* PARAMETERS: Function - Read or Write operation
* Address - Where in the space to read or write
* BitWidth - Field width in bits (8, 16, or 32)
* Value - Pointer to in or out value
* HandlerContext - Pointer to Handler's context
* RegionContext - Pointer to context specific to the
* accessed region
*
* RETURN: Status
*
* DESCRIPTION: Handler for the PCI Config address space (Op Region)
*
******************************************************************************/
ACPI_STATUS
AcpiExPciConfigSpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
ACPI_PCI_ID *PciId;
UINT16 PciRegister;
ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler);
/*
* The arguments to AcpiOs(Read|Write)PciConfiguration are:
*
* PciSegment is the PCI bus segment range 0-31
* PciBus is the PCI bus number range 0-255
* PciDevice is the PCI device number range 0-31
* PciFunction is the PCI device function number
* PciRegister is the Config space register range 0-255 bytes
*
* Value - input value for write, output address for read
*
*/
PciId = (ACPI_PCI_ID *) RegionContext;
PciRegister = (UINT16) (UINT32) Address;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Pci-Config %u (%u) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
Function, BitWidth, PciId->Segment, PciId->Bus, PciId->Device,
PciId->Function, PciRegister));
switch (Function)
{
case ACPI_READ:
*Value = 0;
Status = AcpiOsReadPciConfiguration (PciId, PciRegister,
Value, BitWidth);
break;
case ACPI_WRITE:
Status = AcpiOsWritePciConfiguration (PciId, PciRegister,
*Value, BitWidth);
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExCmosSpaceHandler
*
* PARAMETERS: Function - Read or Write operation
* Address - Where in the space to read or write
* BitWidth - Field width in bits (8, 16, or 32)
* Value - Pointer to in or out value
* HandlerContext - Pointer to Handler's context
* RegionContext - Pointer to context specific to the
* accessed region
*
* RETURN: Status
*
* DESCRIPTION: Handler for the CMOS address space (Op Region)
*
******************************************************************************/
ACPI_STATUS
AcpiExCmosSpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (ExCmosSpaceHandler);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExPciBarSpaceHandler
*
* PARAMETERS: Function - Read or Write operation
* Address - Where in the space to read or write
* BitWidth - Field width in bits (8, 16, or 32)
* Value - Pointer to in or out value
* HandlerContext - Pointer to Handler's context
* RegionContext - Pointer to context specific to the
* accessed region
*
* RETURN: Status
*
* DESCRIPTION: Handler for the PCI BarTarget address space (Op Region)
*
******************************************************************************/
ACPI_STATUS
AcpiExPciBarSpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (ExPciBarSpaceHandler);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExDataTableSpaceHandler
*
* PARAMETERS: Function - Read or Write operation
* Address - Where in the space to read or write
* BitWidth - Field width in bits (8, 16, or 32)
* Value - Pointer to in or out value
* HandlerContext - Pointer to Handler's context
* RegionContext - Pointer to context specific to the
* accessed region
*
* RETURN: Status
*
* DESCRIPTION: Handler for the Data Table address space (Op Region)
*
******************************************************************************/
ACPI_STATUS
AcpiExDataTableSpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_FUNCTION_TRACE (ExDataTableSpaceHandler);
/*
* Perform the memory read or write. The BitWidth was already
* validated.
*/
switch (Function)
{
case ACPI_READ:
ACPI_MEMCPY (ACPI_CAST_PTR (char, Value), ACPI_PHYSADDR_TO_PTR (Address),
ACPI_DIV_8 (BitWidth));
break;
case ACPI_WRITE:
ACPI_MEMCPY (ACPI_PHYSADDR_TO_PTR (Address), ACPI_CAST_PTR (char, Value),
ACPI_DIV_8 (BitWidth));
break;
default:
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
return_ACPI_STATUS (AE_OK);
}
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