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minix/drivers/acpi/executer/exregion.c
Tomas Hruby 9560b6dea8 ACPI driver 
- 99% of the code is Intel's ACPICA. The license is compliant with BSD
  and GNU and virtually all systems that use ACPI use this code, For
  instance it is part of the Linux kernel.

- The only minix specific files are

  acpi.c
  osminixxf.c
  platform/acminix.h

  and

  include/minix/acpi.h

- At the moment the driver does not register interrupt hooks which I
  believe is mainly for handling PnP, events like "battery level is
  low" and power management. Should not be difficult to add it if need
  be.

- The interface to the outside world is virtually non-existent except
  a trivial message based service for PCI driver to query which device
  is connected to what IRQ line. This will evolve as more components
  start using this driver. VM, Scheduler and IOMMU are the possible
  users right now.

- because of dependency on a native 64bit (long long, part of c99) it
  is compiled only with a gnu-like compilers which in case of Minix
  includes gcc llvm-gcc and clang
2010-09-02 15:44:04 +00:00

638 lines
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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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