Advanced Configuration and Power Interface Specification

ACPI Source Language (ASL)Reference
DescriptorName is an optional argument that specifies a name for an integer constant that will be
created in the current scope that contains the offset of this resource descriptor within the current
resource template buffer. The predefined descriptor field names may be appended to this name to
access individual fields within the descriptor via the Buffer Field operators.
TranslationType is an optional argument that specifies whether the resource type on the secondary
side of the bus is different (TypeTranslation) from that on the primary side of the bus or the same
(TypeStatic). If TypeTranslation is specified, then the secondary side of the bus is Memory. If
TypeStatic is specified, then the secondary side of the bus is I/O. If nothing is specified, then
TypeStatic is assumed. The 1-bit field DescriptorName._TTP is automatically created to refer to this
portion of the resource descriptor, where ‘1’ is TypeTranslation and ‘0’ is TypeStatic. See _TTP
(page 365) for more information
TranslationDensity is an optional argument that specifies whether or not the translation from the
primary to secondary bus is sparse (SparseTranslation) or dense (DenseTranslation). It is only
used when TranslationType is TypeTranslation. If nothing is specified, then DenseTranslation is
assumed. The 1-bit field DescriptorName._TRS is automatically created to refer to this portion of
the resource descriptor, where ‘1’ is SparseTranslation and ‘0’ is DenseTranslation. See _TRS
(page 366) for more information.
Description
The DWordIO macro evaluates to a buffer which contains a 32-bit I/O range resource descriptor.
The format of the 32-bit I/O range resource descriptor can be found in “DWord Address Space
Descriptor ” (page 358). The macro is designed to be used inside of a ResourceTemplate (page 882).
19.6.34 DWordMemory (DWord Memory Resource Descriptor Macro)
Syntax
DWordMemory (ResourceUsage, Decode, IsMinFixed, IsMaxFixed, Cacheable, ReadAndWrite,
AddressGranularity, AddressMinimum, AddressMaximum, AddressTranslation, RangeLength,
ResourceSourceIndex, ResourceSource, DescriptorName, MemoryRangeType, TranslationType)
Arguments
ResourceUsage specifies whether the Memory range is consumed by this device
(ResourceConsumer) or passed on to child devices (ResourceProducer). If nothing is specified,
then ResourceConsumer is assumed.
Decode specifies whether or not the device decodes the Memory range using positive (PosDecode)
or subtractive (SubDecode) decode. If nothing is specified, then PosDecode is assumed. The 1-bit
field DescriptorName._DEC is automatically created to refer to this portion of the resource
descriptor, where ‘1’ is SubDecode and ‘0’ is PosDecode.
IsMinFixed specifies whether the minimum address of this Memory range is fixed (MinFixed) or
can be changed (MinNotFixed). If nothing is specified, then MinNotFixed is assumed. The 1-bit
field DescriptorName._MIF is automatically created to refer to this portion of the resource
descriptor, where ‘1’ is MinFixed and ‘0’ is MinNotFixed.
IsMaxFixed specifies whether the maximum address of this Memory range is fixed (MaxFixed) or
can be changed (MaxNotFixed). If nothing is specified, then MaxNotFixed is assumed. The 1-bit
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