rscalc.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acresrc.h"
#include "acnamesp.h"

Include dependency graph for rscalc.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_RESOURCES

Functions
static UINT8	AcpiRsCountSetBits (UINT16 BitField)
static ACPI_RS_LENGTH	AcpiRsStructOptionLength (ACPI_RESOURCE_SOURCE *ResourceSource)
static UINT32	AcpiRsStreamOptionLength (UINT32 ResourceLength, UINT32 MinimumTotalLength)
ACPI_STATUS	AcpiRsGetAmlLength (ACPI_RESOURCE *Resource, ACPI_SIZE ResourceListSize, ACPI_SIZE *SizeNeeded)
ACPI_STATUS	AcpiRsGetListLength (UINT8 *AmlBuffer, UINT32 AmlBufferLength, ACPI_SIZE *SizeNeeded)
ACPI_STATUS	AcpiRsGetPciRoutingTableLength (ACPI_OPERAND_OBJECT *PackageObject, ACPI_SIZE *BufferSizeNeeded)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_RESOURCES

Definition at line 50 of file rscalc.c.

Function Documentation

AcpiRsCountSetBits()

static UINT8 AcpiRsCountSetBits ( UINT16  BitField )

static

Definition at line 84 of file rscalc.c.

{
    UINT8                   BitsSet;
 
 
    ACPI_FUNCTION_ENTRY ();
 
 
    for (BitsSet = 0; BitField; BitsSet++)
    {
        /* Zero the least significant bit that is set */
 
        BitField &= (UINT16) (BitField - 1);
    }
 
    return (BitsSet);
}

Referenced by AcpiRsGetListLength().

AcpiRsGetAmlLength()

ACPI_STATUS AcpiRsGetAmlLength	(	ACPI_RESOURCE *	Resource,
		ACPI_SIZE	ResourceListSize,
		ACPI_SIZE *	SizeNeeded
	)

Definition at line 211 of file rscalc.c.

{
    ACPI_SIZE               AmlSizeNeeded = 0;
    ACPI_RESOURCE           *ResourceEnd;
    ACPI_RS_LENGTH          TotalSize;
 
 
    ACPI_FUNCTION_TRACE (RsGetAmlLength);
 
 
    /* Traverse entire list of internal resource descriptors */
 
    ResourceEnd = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, ResourceListSize);
    while (Resource < ResourceEnd)
    {
        /* Validate the descriptor type */
 
        if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
        {
            return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
        }
 
        /* Sanity check the length. It must not be zero, or we loop forever */
 
        if (!Resource->Length)
        {
            return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
        }
 
        /* Get the base size of the (external stream) resource descriptor */
 
        TotalSize = AcpiGbl_AmlResourceSizes [Resource->Type];
 
        /*
         * Augment the base size for descriptors with optional and/or
         * variable-length fields
         */
        switch (Resource->Type)
        {
        case ACPI_RESOURCE_TYPE_IRQ:
 
            /* Length can be 3 or 2 */
 
            if (Resource->Data.Irq.DescriptorLength == 2)
            {
                TotalSize--;
            }
            break;
 
 
        case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 
            /* Length can be 1 or 0 */
 
            if (Resource->Data.Irq.DescriptorLength == 0)
            {
                TotalSize--;
            }
            break;
 
 
        case ACPI_RESOURCE_TYPE_VENDOR:
            /*
             * Vendor Defined Resource:
             * For a Vendor Specific resource, if the Length is between 1 and 7
             * it will be created as a Small Resource data type, otherwise it
             * is a Large Resource data type.
             */
            if (Resource->Data.Vendor.ByteLength > 7)
            {
                /* Base size of a Large resource descriptor */
 
                TotalSize = sizeof (AML_RESOURCE_LARGE_HEADER);
            }
 
            /* Add the size of the vendor-specific data */
 
            TotalSize = (ACPI_RS_LENGTH)
                (TotalSize + Resource->Data.Vendor.ByteLength);
            break;
 
 
        case ACPI_RESOURCE_TYPE_END_TAG:
            /*
             * End Tag:
             * We are done -- return the accumulated total size.
             */
            *SizeNeeded = AmlSizeNeeded + TotalSize;
 
            /* Normal exit */
 
            return_ACPI_STATUS (AE_OK);
 
 
        case ACPI_RESOURCE_TYPE_ADDRESS16:
            /*
             * 16-Bit Address Resource:
             * Add the size of the optional ResourceSource info
             */
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                AcpiRsStructOptionLength (
                    &Resource->Data.Address16.ResourceSource));
            break;
 
 
        case ACPI_RESOURCE_TYPE_ADDRESS32:
            /*
             * 32-Bit Address Resource:
             * Add the size of the optional ResourceSource info
             */
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                AcpiRsStructOptionLength (
                    &Resource->Data.Address32.ResourceSource));
            break;
 
 
        case ACPI_RESOURCE_TYPE_ADDRESS64:
            /*
             * 64-Bit Address Resource:
             * Add the size of the optional ResourceSource info
             */
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                AcpiRsStructOptionLength (
                    &Resource->Data.Address64.ResourceSource));
            break;
 
 
        case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
            /*
             * Extended IRQ Resource:
             * Add the size of each additional optional interrupt beyond the
             * required 1 (4 bytes for each UINT32 interrupt number)
             */
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                ((Resource->Data.ExtendedIrq.InterruptCount - 1) * 4) +
 
                /* Add the size of the optional ResourceSource info */
 
                AcpiRsStructOptionLength (
                    &Resource->Data.ExtendedIrq.ResourceSource));
            break;
 
 
        case ACPI_RESOURCE_TYPE_GPIO:
 
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                (Resource->Data.Gpio.PinTableLength * 2) +
                Resource->Data.Gpio.ResourceSource.StringLength +
                Resource->Data.Gpio.VendorLength);
 
            break;
 
        case ACPI_RESOURCE_TYPE_PIN_FUNCTION:
 
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                (Resource->Data.PinFunction.PinTableLength * 2) +
                Resource->Data.PinFunction.ResourceSource.StringLength +
                Resource->Data.PinFunction.VendorLength);
 
            break;
 
 
        case ACPI_RESOURCE_TYPE_SERIAL_BUS:
 
            TotalSize = AcpiGbl_AmlResourceSerialBusSizes [
                Resource->Data.CommonSerialBus.Type];
 
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                Resource->Data.I2cSerialBus.ResourceSource.StringLength +
                Resource->Data.I2cSerialBus.VendorLength);
 
            break;
 
        case ACPI_RESOURCE_TYPE_PIN_CONFIG:
 
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                (Resource->Data.PinConfig.PinTableLength * 2) +
                Resource->Data.PinConfig.ResourceSource.StringLength +
                Resource->Data.PinConfig.VendorLength);
 
            break;
 
        case ACPI_RESOURCE_TYPE_PIN_GROUP:
 
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                (Resource->Data.PinGroup.PinTableLength * 2) +
                Resource->Data.PinGroup.ResourceLabel.StringLength +
                Resource->Data.PinGroup.VendorLength);
 
            break;
 
        case ACPI_RESOURCE_TYPE_PIN_GROUP_FUNCTION:
 
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                Resource->Data.PinGroupFunction.ResourceSource.StringLength +
                Resource->Data.PinGroupFunction.ResourceSourceLabel.StringLength +
                Resource->Data.PinGroupFunction.VendorLength);
 
            break;
 
        case ACPI_RESOURCE_TYPE_PIN_GROUP_CONFIG:
 
            TotalSize = (ACPI_RS_LENGTH) (TotalSize +
                Resource->Data.PinGroupConfig.ResourceSource.StringLength +
                Resource->Data.PinGroupConfig.ResourceSourceLabel.StringLength +
                Resource->Data.PinGroupConfig.VendorLength);
 
            break;
 
        default:
 
            break;
        }
 
        /* Update the total */
 
        AmlSizeNeeded += TotalSize;
 
        /* Point to the next object */
 
        Resource = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, Resource->Length);
    }
 
    /* Did not find an EndTag resource descriptor */
 
    return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
}

Referenced by AcpiRsCreateAmlResources().

AcpiRsGetListLength()

ACPI_STATUS AcpiRsGetListLength	(	UINT8 *	AmlBuffer,
		UINT32	AmlBufferLength,
		ACPI_SIZE *	SizeNeeded
	)

Definition at line 460 of file rscalc.c.

{
    ACPI_STATUS             Status;
    UINT8                   *EndAml;
    UINT8                   *Buffer;
    UINT32                  BufferSize;
    UINT16                  Temp16;
    UINT16                  ResourceLength;
    UINT32                  ExtraStructBytes;
    UINT8                   ResourceIndex;
    UINT8                   MinimumAmlResourceLength;
    AML_RESOURCE            *AmlResource;
 
 
    ACPI_FUNCTION_TRACE (RsGetListLength);
 
 
    *SizeNeeded = ACPI_RS_SIZE_MIN;         /* Minimum size is one EndTag */
    EndAml = AmlBuffer + AmlBufferLength;
 
    /* Walk the list of AML resource descriptors */
 
    while (AmlBuffer < EndAml)
    {
        /* Validate the Resource Type and Resource Length */
 
        Status = AcpiUtValidateResource (NULL, AmlBuffer, &ResourceIndex);
        if (ACPI_FAILURE (Status))
        {
            /*
             * Exit on failure. Cannot continue because the descriptor length
             * may be bogus also.
             */
            return_ACPI_STATUS (Status);
        }
 
        AmlResource = (void *) AmlBuffer;
 
        /* Get the resource length and base (minimum) AML size */
 
        ResourceLength = AcpiUtGetResourceLength (AmlBuffer);
        MinimumAmlResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex];
 
        /*
         * Augment the size for descriptors with optional
         * and/or variable length fields
         */
        ExtraStructBytes = 0;
        Buffer = AmlBuffer + AcpiUtGetResourceHeaderLength (AmlBuffer);
 
        switch (AcpiUtGetResourceType (AmlBuffer))
        {
        case ACPI_RESOURCE_NAME_IRQ:
            /*
             * IRQ Resource:
             * Get the number of bits set in the 16-bit IRQ mask
             */
            ACPI_MOVE_16_TO_16 (&Temp16, Buffer);
            ExtraStructBytes = AcpiRsCountSetBits (Temp16);
            break;
 
 
        case ACPI_RESOURCE_NAME_DMA:
            /*
             * DMA Resource:
             * Get the number of bits set in the 8-bit DMA mask
             */
            ExtraStructBytes = AcpiRsCountSetBits (*Buffer);
            break;
 
 
        case ACPI_RESOURCE_NAME_VENDOR_SMALL:
        case ACPI_RESOURCE_NAME_VENDOR_LARGE:
            /*
             * Vendor Resource:
             * Get the number of vendor data bytes
             */
            ExtraStructBytes = ResourceLength;
 
            /*
             * There is already one byte included in the minimum
             * descriptor size. If there are extra struct bytes,
             * subtract one from the count.
             */
            if (ExtraStructBytes)
            {
                ExtraStructBytes--;
            }
            break;
 
 
        case ACPI_RESOURCE_NAME_END_TAG:
            /*
             * End Tag: This is the normal exit
             */
            return_ACPI_STATUS (AE_OK);
 
 
        case ACPI_RESOURCE_NAME_ADDRESS32:
        case ACPI_RESOURCE_NAME_ADDRESS16:
        case ACPI_RESOURCE_NAME_ADDRESS64:
            /*
             * Address Resource:
             * Add the size of the optional ResourceSource
             */
            ExtraStructBytes = AcpiRsStreamOptionLength (
                ResourceLength, MinimumAmlResourceLength);
            break;
 
 
        case ACPI_RESOURCE_NAME_EXTENDED_IRQ:
            /*
             * Extended IRQ Resource:
             * Using the InterruptTableLength, add 4 bytes for each additional
             * interrupt. Note: at least one interrupt is required and is
             * included in the minimum descriptor size (reason for the -1)
             */
            ExtraStructBytes = (Buffer[1] - 1) * sizeof (UINT32);
 
            /* Add the size of the optional ResourceSource */
 
            ExtraStructBytes += AcpiRsStreamOptionLength (
                ResourceLength - ExtraStructBytes, MinimumAmlResourceLength);
            break;
 
        case ACPI_RESOURCE_NAME_GPIO:
 
            /* Vendor data is optional */
 
            if (AmlResource->Gpio.VendorLength)
            {
                ExtraStructBytes +=
                    AmlResource->Gpio.VendorOffset -
                    AmlResource->Gpio.PinTableOffset +
                    AmlResource->Gpio.VendorLength;
            }
            else
            {
                ExtraStructBytes +=
                    AmlResource->LargeHeader.ResourceLength +
                    sizeof (AML_RESOURCE_LARGE_HEADER) -
                    AmlResource->Gpio.PinTableOffset;
            }
            break;
 
        case ACPI_RESOURCE_NAME_PIN_FUNCTION:
 
            /* Vendor data is optional */
 
            if (AmlResource->PinFunction.VendorLength)
            {
                ExtraStructBytes +=
                    AmlResource->PinFunction.VendorOffset -
                    AmlResource->PinFunction.PinTableOffset +
                    AmlResource->PinFunction.VendorLength;
            }
            else
            {
                ExtraStructBytes +=
                    AmlResource->LargeHeader.ResourceLength +
                    sizeof (AML_RESOURCE_LARGE_HEADER) -
                    AmlResource->PinFunction.PinTableOffset;
            }
            break;
 
        case ACPI_RESOURCE_NAME_SERIAL_BUS:
 
            MinimumAmlResourceLength = AcpiGbl_ResourceAmlSerialBusSizes[
                AmlResource->CommonSerialBus.Type];
            ExtraStructBytes +=
                AmlResource->CommonSerialBus.ResourceLength -
                MinimumAmlResourceLength;
            break;
 
        case ACPI_RESOURCE_NAME_PIN_CONFIG:
 
            /* Vendor data is optional */
 
            if (AmlResource->PinConfig.VendorLength)
            {
                ExtraStructBytes +=
                    AmlResource->PinConfig.VendorOffset -
                    AmlResource->PinConfig.PinTableOffset +
                    AmlResource->PinConfig.VendorLength;
            }
            else
            {
                ExtraStructBytes +=
                    AmlResource->LargeHeader.ResourceLength +
                    sizeof (AML_RESOURCE_LARGE_HEADER) -
                    AmlResource->PinConfig.PinTableOffset;
            }
            break;
 
        case ACPI_RESOURCE_NAME_PIN_GROUP:
 
            ExtraStructBytes +=
                AmlResource->PinGroup.VendorOffset -
                AmlResource->PinGroup.PinTableOffset +
                AmlResource->PinGroup.VendorLength;
 
            break;
 
        case ACPI_RESOURCE_NAME_PIN_GROUP_FUNCTION:
 
            ExtraStructBytes +=
                AmlResource->PinGroupFunction.VendorOffset -
                AmlResource->PinGroupFunction.ResSourceOffset +
                AmlResource->PinGroupFunction.VendorLength;
 
            break;
 
        case ACPI_RESOURCE_NAME_PIN_GROUP_CONFIG:
 
            ExtraStructBytes +=
                AmlResource->PinGroupConfig.VendorOffset -
                AmlResource->PinGroupConfig.ResSourceOffset +
                AmlResource->PinGroupConfig.VendorLength;
 
            break;
 
        default:
 
            break;
        }
 
        /*
         * Update the required buffer size for the internal descriptor structs
         *
         * Important: Round the size up for the appropriate alignment. This
         * is a requirement on IA64.
         */
        if (AcpiUtGetResourceType (AmlBuffer) ==
            ACPI_RESOURCE_NAME_SERIAL_BUS)
        {
            BufferSize = AcpiGbl_ResourceStructSerialBusSizes[
                AmlResource->CommonSerialBus.Type] + ExtraStructBytes;
        }
        else
        {
            BufferSize = AcpiGbl_ResourceStructSizes[ResourceIndex] +
                ExtraStructBytes;
        }
 
        BufferSize = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (BufferSize);
        *SizeNeeded += BufferSize;
 
        ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES,
            "Type %.2X, AmlLength %.2X InternalLength %.2X%8X\n",
            AcpiUtGetResourceType (AmlBuffer),
            AcpiUtGetDescriptorLength (AmlBuffer), ACPI_FORMAT_UINT64(*SizeNeeded)));
 
        /*
         * Point to the next resource within the AML stream using the length
         * contained in the resource descriptor header
         */
        AmlBuffer += AcpiUtGetDescriptorLength (AmlBuffer);
    }
 
    /* Did not find an EndTag resource descriptor */
 
    return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
}

Referenced by AcpiBufferToResource(), and AcpiRsCreateResourceList().

AcpiRsGetPciRoutingTableLength()

ACPI_STATUS AcpiRsGetPciRoutingTableLength	(	ACPI_OPERAND_OBJECT *	PackageObject,
		ACPI_SIZE *	BufferSizeNeeded
	)

Definition at line 746 of file rscalc.c.

{
    UINT32                  NumberOfElements;
    ACPI_SIZE               TempSizeNeeded = 0;
    ACPI_OPERAND_OBJECT     **TopObjectList;
    UINT32                  Index;
    ACPI_OPERAND_OBJECT     *PackageElement;
    ACPI_OPERAND_OBJECT     **SubObjectList;
    BOOLEAN                 NameFound;
    UINT32                  TableIndex;
 
 
    ACPI_FUNCTION_TRACE (RsGetPciRoutingTableLength);
 
 
    NumberOfElements = PackageObject->Package.Count;
 
    /*
     * Calculate the size of the return buffer.
     * The base size is the number of elements * the sizes of the
     * structures. Additional space for the strings is added below.
     * The minus one is to subtract the size of the UINT8 Source[1]
     * member because it is added below.
     *
     * But each PRT_ENTRY structure has a pointer to a string and
     * the size of that string must be found.
     */
    TopObjectList = PackageObject->Package.Elements;
 
    for (Index = 0; Index < NumberOfElements; Index++)
    {
        /* Dereference the subpackage */
 
        PackageElement = *TopObjectList;
 
        /* We must have a valid Package object */
 
        if (!PackageElement ||
            (PackageElement->Common.Type != ACPI_TYPE_PACKAGE))
        {
            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }
 
        /*
         * The SubObjectList will now point to an array of the
         * four IRQ elements: Address, Pin, Source and SourceIndex
         */
        SubObjectList = PackageElement->Package.Elements;
 
        /* Scan the IrqTableElements for the Source Name String */
 
        NameFound = FALSE;
 
        for (TableIndex = 0;
             TableIndex < PackageElement->Package.Count && !NameFound;
             TableIndex++)
        {
            if (*SubObjectList && /* Null object allowed */
 
                ((ACPI_TYPE_STRING ==
                    (*SubObjectList)->Common.Type) ||
 
                ((ACPI_TYPE_LOCAL_REFERENCE ==
                    (*SubObjectList)->Common.Type) &&
 
                    ((*SubObjectList)->Reference.Class ==
                        ACPI_REFCLASS_NAME))))
            {
                NameFound = TRUE;
            }
            else
            {
                /* Look at the next element */
 
                SubObjectList++;
            }
        }
 
        TempSizeNeeded += (sizeof (ACPI_PCI_ROUTING_TABLE) - 4);
 
        /* Was a String type found? */
 
        if (NameFound)
        {
            if ((*SubObjectList)->Common.Type == ACPI_TYPE_STRING)
            {
                /*
                 * The length String.Length field does not include the
                 * terminating NULL, add 1
                 */
                TempSizeNeeded += ((ACPI_SIZE)
                    (*SubObjectList)->String.Length + 1);
            }
            else
            {
                TempSizeNeeded += AcpiNsGetPathnameLength (
                    (*SubObjectList)->Reference.Node);
            }
        }
        else
        {
            /*
             * If no name was found, then this is a NULL, which is
             * translated as a UINT32 zero.
             */
            TempSizeNeeded += sizeof (UINT32);
        }
 
        /* Round up the size since each element must be aligned */
 
        TempSizeNeeded = ACPI_ROUND_UP_TO_64BIT (TempSizeNeeded);
 
        /* Point to the next ACPI_OPERAND_OBJECT */
 
        TopObjectList++;
    }
 
    /*
     * Add an extra element to the end of the list, essentially a
     * NULL terminator
     */
    *BufferSizeNeeded = TempSizeNeeded + sizeof (ACPI_PCI_ROUTING_TABLE);
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiRsCreatePciRoutingTable().

AcpiRsStreamOptionLength()

static UINT32 AcpiRsStreamOptionLength ( UINT32  ResourceLength, UINT32  MinimumTotalLength  )

static

Definition at line 156 of file rscalc.c.

{
    UINT32                  StringLength = 0;
 
 
    ACPI_FUNCTION_ENTRY ();
 
 
    /*
     * The ResourceSourceIndex and ResourceSource are optional elements of
     * some Large-type resource descriptors.
     */
 
    /*
     * If the length of the actual resource descriptor is greater than the
     * ACPI spec-defined minimum length, it means that a ResourceSourceIndex
     * exists and is followed by a (required) null terminated string. The
     * string length (including the null terminator) is the resource length
     * minus the minimum length, minus one byte for the ResourceSourceIndex
     * itself.
     */
    if (ResourceLength > MinimumAmlResourceLength)
    {
        /* Compute the length of the optional string */
 
        StringLength = ResourceLength - MinimumAmlResourceLength - 1;
    }
 
    /*
     * Round the length up to a multiple of the native word in order to
     * guarantee that the entire resource descriptor is native word aligned
     */
    return ((UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (StringLength));
}

Referenced by AcpiRsGetListLength().

AcpiRsStructOptionLength()

static ACPI_RS_LENGTH AcpiRsStructOptionLength ( ACPI_RESOURCE_SOURCE *  ResourceSource )

static

Definition at line 119 of file rscalc.c.

{
    ACPI_FUNCTION_ENTRY ();
 
 
    /*
     * If the ResourceSource string is valid, return the size of the string
     * (StringLength includes the NULL terminator) plus the size of the
     * ResourceSourceIndex (1).
     */
    if (ResourceSource->StringPtr)
    {
        return ((ACPI_RS_LENGTH) (ResourceSource->StringLength + 1));
    }
 
    return (0);
}

Referenced by AcpiRsGetAmlLength().