Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
Description
The Interrupt macro evaluates to a buffer that contains an interrupt resource descriptor. The format
of the interrupt resource descriptor can be found in “Extended Interrupt Descriptor ” (page 343). The
macro is designed to be used inside of a ResourceTemplate (page 882).
19.6.63 IO (IO Resource Descriptor Macro)
Syntax
IO (Decode, AddressMin, AddressMax, AddressAlignment, RangeLength, DescriptorName) =>
Buffer
Argument
Decode describes whether the I/O range uses 10-bit decode (Decode10) or 16-bit decode
(Decode16). The field DescriptorName. _DEC is automatically created to refer to this portion of the
resource descriptor, where ‘1’ is Decode16 and ‘0’ is Decode10.
AddressMin evaluates to a 16-bit integer that specifies the minimum acceptable starting address for
the I/O range. It must be an even multiple of AddressAlignment. The field DescriptorName._MIN is
automatically created to refer to this portion of the resource descriptor.
AddressMax evaluates to a 16-bit integer that specifies the maximum acceptable starting address for
the I/O range. It must be an even multiple of AddressAlignment. The field DescriptorName._MAX is
automatically created to refer to this portion of the resource descriptor.
AddressAlignment evaluates to an 8-bit integer that specifies the alignment granularity for the I/O
address assigned. The field DescriptorName. _ALN is automatically created to refer to this portion
of the resource descriptor.
RangeLength evaluates to an 8-bit integer that specifies the number of bytes in the I/O range. The
field DescriptorName. _LEN is automatically created to refer to this portion of the resource
descriptor.
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.
Description
The IO macro evaluates to a buffer which contains an IO resource descriptor. The format of the IO
descriptor can be found in “I/O Port Descriptor” (page 343). The macro is designed to be used inside
of a ResourceTemplate (page 882).
19.6.64 IRQ (Interrupt Resource Descriptor Macro)
Syntax
IRQ (EdgeLevel, ActiveLevel, Shared, DescriptorName) {InterruptList} => Buffer
852 April, 2015 Version 6.0