exregion.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acinterp.h"

Include dependency graph for exregion.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_EXECUTER

Functions
ACPI_STATUS	AcpiExSystemMemorySpaceHandler (UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 BitWidth, UINT64 *Value, void *HandlerContext, void *RegionContext)
ACPI_STATUS	AcpiExSystemIoSpaceHandler (UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 BitWidth, UINT64 *Value, void *HandlerContext, void *RegionContext)
ACPI_STATUS	AcpiExPciConfigSpaceHandler (UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 BitWidth, UINT64 *Value, void *HandlerContext, void *RegionContext)
ACPI_STATUS	AcpiExCmosSpaceHandler (UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 BitWidth, UINT64 *Value, void *HandlerContext, void *RegionContext)
ACPI_STATUS	AcpiExPciBarSpaceHandler (UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 BitWidth, UINT64 *Value, void *HandlerContext, void *RegionContext)
ACPI_STATUS	AcpiExDataTableSpaceHandler (UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 BitWidth, UINT64 *Value, void *HandlerContext, void *RegionContext)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_EXECUTER

Definition at line 49 of file exregion.c.

Function Documentation

AcpiExCmosSpaceHandler()

ACPI_STATUS AcpiExCmosSpaceHandler	(	UINT32	Function,
		ACPI_PHYSICAL_ADDRESS	Address,
		UINT32	BitWidth,
		UINT64 *	Value,
		void *	HandlerContext,
		void *	RegionContext
	)

Definition at line 505 of file exregion.c.

{
    ACPI_STATUS             Status = AE_OK;
 
 
    ACPI_FUNCTION_TRACE (ExCmosSpaceHandler);
 
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEvInstallSpaceHandler().

AcpiExDataTableSpaceHandler()

ACPI_STATUS AcpiExDataTableSpaceHandler	(	UINT32	Function,
		ACPI_PHYSICAL_ADDRESS	Address,
		UINT32	BitWidth,
		UINT64 *	Value,
		void *	HandlerContext,
		void *	RegionContext
	)

Definition at line 579 of file exregion.c.

{
    ACPI_DATA_TABLE_MAPPING *Mapping;
    char                    *Pointer;
 
 
    ACPI_FUNCTION_TRACE (ExDataTableSpaceHandler);
 
 
    Mapping = (ACPI_DATA_TABLE_MAPPING *) RegionContext;
    Pointer = ACPI_CAST_PTR (char, Mapping->Pointer) +
        (Address - ACPI_PTR_TO_PHYSADDR (Mapping->Pointer));
 
    /*
     * Perform the memory read or write. The BitWidth was already
     * validated.
     */
    switch (Function)
    {
    case ACPI_READ:
 
        memcpy (ACPI_CAST_PTR (char, Value), Pointer, ACPI_DIV_8 (BitWidth));
        break;
 
    case ACPI_WRITE:
 
        memcpy (Pointer, ACPI_CAST_PTR (char, Value), ACPI_DIV_8 (BitWidth));
        break;
 
    default:
 
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiEvInstallSpaceHandler().

AcpiExPciBarSpaceHandler()

ACPI_STATUS AcpiExPciBarSpaceHandler	(	UINT32	Function,
		ACPI_PHYSICAL_ADDRESS	Address,
		UINT32	BitWidth,
		UINT64 *	Value,
		void *	HandlerContext,
		void *	RegionContext
	)

Definition at line 542 of file exregion.c.

{
    ACPI_STATUS             Status = AE_OK;
 
 
    ACPI_FUNCTION_TRACE (ExPciBarSpaceHandler);
 
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEvInstallSpaceHandler().

AcpiExPciConfigSpaceHandler()

ACPI_STATUS AcpiExPciConfigSpaceHandler	(	UINT32	Function,
		ACPI_PHYSICAL_ADDRESS	Address,
		UINT32	BitWidth,
		UINT64 *	Value,
		void *	HandlerContext,
		void *	RegionContext
	)

Definition at line 424 of file exregion.c.

{
    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);
}

Referenced by AcpiEvInstallSpaceHandler().

AcpiExSystemIoSpaceHandler()

ACPI_STATUS AcpiExSystemIoSpaceHandler	(	UINT32	Function,
		ACPI_PHYSICAL_ADDRESS	Address,
		UINT32	BitWidth,
		UINT64 *	Value,
		void *	HandlerContext,
		void *	RegionContext
	)

Definition at line 359 of file exregion.c.

{
    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_UINT64 (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);
}

Referenced by AcpiEvInstallSpaceHandler().

AcpiExSystemMemorySpaceHandler()

ACPI_STATUS AcpiExSystemMemorySpaceHandler	(	UINT32	Function,
		ACPI_PHYSICAL_ADDRESS	Address,
		UINT32	BitWidth,
		UINT64 *	Value,
		void *	HandlerContext,
		void *	RegionContext
	)

Definition at line 72 of file exregion.c.

{
    ACPI_STATUS             Status = AE_OK;
    void                    *LogicalAddrPtr = NULL;
    ACPI_MEM_SPACE_CONTEXT  *MemInfo = RegionContext;
    ACPI_MEM_MAPPING        *Mm = MemInfo->CurMm;
    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 (!Mm || (Address < Mm->PhysicalAddress) ||
        ((UINT64) Address + Length > (UINT64) Mm->PhysicalAddress + Mm->Length))
    {
        /*
         * The request cannot be resolved by the current memory mapping.
         *
         * Look for an existing saved mapping covering the address range
         * at hand. If found, save it as the current one and carry out
         * the access.
         */
        for (Mm = MemInfo->FirstMm; Mm; Mm = Mm->NextMm)
        {
            if (Mm == MemInfo->CurMm)
            {
                continue;
            }
 
            if (Address < Mm->PhysicalAddress)
            {
                continue;
            }
 
            if ((UINT64) Address + Length > (UINT64) Mm->PhysicalAddress + Mm->Length)
            {
                continue;
            }
 
            MemInfo->CurMm = Mm;
            goto access;
        }
 
        /* Create a new mappings list entry */
 
        Mm = ACPI_ALLOCATE_ZEROED(sizeof(*Mm));
        if (!Mm)
        {
            ACPI_ERROR((AE_INFO,
                "Unable to save memory mapping at 0x%8.8X%8.8X, size %u",
                ACPI_FORMAT_UINT64(Address), Length));
            return_ACPI_STATUS(AE_NO_MEMORY);
        }
 
        /*
         * 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_SIZE)
            (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 */
 
        LogicalAddrPtr = AcpiOsMapMemory(Address, MapLength);
        if (!LogicalAddrPtr)
        {
            ACPI_ERROR ((AE_INFO,
                "Could not map memory at 0x%8.8X%8.8X, size %u",
                ACPI_FORMAT_UINT64 (Address), (UINT32) MapLength));
            ACPI_FREE(Mm);
            return_ACPI_STATUS (AE_NO_MEMORY);
        }
 
        /* Save the physical address and mapping size */
 
        Mm->LogicalAddress = LogicalAddrPtr;
        Mm->PhysicalAddress = Address;
        Mm->Length = MapLength;
 
        /*
         * Add the new entry to the mappigs list and save it as the
         * current mapping.
         */
        Mm->NextMm = MemInfo->FirstMm;
        MemInfo->FirstMm = Mm;
        MemInfo->CurMm = Mm;
    }
 
access:
    /*
     * Generate a logical pointer corresponding to the address we want to
     * access
     */
    LogicalAddrPtr = Mm->LogicalAddress +
        ((UINT64) Address - (UINT64) Mm->PhysicalAddress);
 
    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
        "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
        BitWidth, Function, ACPI_FORMAT_UINT64 (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, *Value);
            break;
 
        case 16:
 
            ACPI_SET16 (LogicalAddrPtr, *Value);
            break;
 
        case 32:
 
            ACPI_SET32 (LogicalAddrPtr, *Value);
            break;
 
        case 64:
 
            ACPI_SET64 (LogicalAddrPtr, *Value);
            break;
 
        default:
 
            /* BitWidth was already validated */
 
            break;
        }
        break;
 
    default:
 
        Status = AE_BAD_PARAMETER;
        break;
    }
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEvInstallSpaceHandler().