Advanced Configuration and Power Interface Specification

ACPI Source Language (ASL)Reference
as ACPI reclaimable space (AddressRangeACPI) or as system reserved
(AddressRangeReserved). If nothing is specified, then AddressRangeMemory is assumed. The 2-
bit field DescriptorName._MTP is automatically created in order to refer to this portion of the
resource descriptor, where ‘0’ is AddressRangeMemory, ‘1’ is AddressRangeReserved, ‘2’ is
AddressRangeACPI and ‘3’ is AddressRangeNVS.
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 I/O. 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.
Description
The DWordMemory macro evaluates to a buffer which contains a 32-bit memory resource
descriptor. The format of the 32-bit memory 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).
19.6.35 DWordSpace (DWord Space Resource Descriptor Macro)
Syntax
DWordSpace (ResourceType, ResourceUsage, Decode, IsMinFixed, IsMaxFixed,
TypeSpecificFlags, AddressGranularity, AddressMinimum, AddressMaximum, AddressTranslation,
RangeLength, ResourceSourceIndex, ResourceSource, DescriptorName)
Arguments
ResourceType evaluates to an 8-bit integer that specifies the type of this resource. Acceptable values
are 0xC0 through 0xFF.
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
field DescriptorName._MAF is automatically created to refer to this portion of the resource
descriptor, where ‘1’ is MaxFixed and ‘0’ is MaxNotFixed.
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