Advanced Configuration and Power Interface Specification

ACPI Source Language (ASL)Reference
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.
TypeSpecificFlags evaluates to an 8-bit integer. The flags are specific to the ResourceType.
AddressGranularity evaluates to a 64-bit integer that specifies the power-of-two boundary (- 1) on
which the Memory range must be aligned. The 64-bit field DescriptorName. _GRA is automatically
created to refer to this portion of the resource descriptor.
AddressMinimum evaluates to a 64-bit integer that specifies the lowest possible base address of the
Memory range. The value must have ‘0’ in all bits where the corresponding bit in
AddressGranularity is ‘1’. For bridge devices which translate addresses, this is the address on the
secondary bus. The 64-bit field DescriptorName._MIN is automatically created to refer to this
portion of the resource descriptor.
AddressMaximum evaluates to a 64-bit integer that specifies the highest possible base address of the
Memory range. The value must have ‘0’ in all bits where the corresponding bit in
AddressGranularity is ‘1’. For bridge devices which translate addresses, this is the address on the
secondary bus. The 64-bit field DescriptorName._MAX is automatically created to refer to this
portion of the resource descriptor.
AddressTranslation evaluates to a 64-bit integer that specifies the offset to be added to a secondary
bus I/O address which results in the corresponding primary bus I/O address. For all non-bridge
devices or bridges which do not perform translation, this must be ‘0’. The 64-bit field
DescriptorName._TRA is automatically created to refer to this portion of the resource descriptor.
RangeLength evaluates to a 64-bit integer that specifies the total number of bytes decoded in the
Memory range. The 64-bit field DescriptorName. _LEN is automatically created to refer to this
portion of the resource descriptor.
TypeSpecificAttributes is an optional argument that specifies attributes specific to this resource type.
See Section 6.4.3.5.4.1,”Type Specific Attributes”.
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
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