Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
ResourceSource is an optional argument which evaluates to a string containing the path of a device
which produces the pool of resources from which this I/O range is allocated. If this argument is
specified, but the ResourceSourceIndex argument is not specified, a zero value is assumed.
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 WordSpace macro evaluates to a buffer which contains a 16-bit Address Space resource
descriptor. The format of the 16-bit Address Space resource descriptor can be found in “Word
Address Space Descriptor ” (page 360). The macro is designed to be used inside of a
ResourceTemplate (page 882).
19.6.147 XOr (Integer Bitwise Xor)
Syntax
XOr (Source1, Source2, Result) => Integer
Result = Source1 ^ Source2 => Integer
Result ^= Source => Integer
Arguments
Source1 and Source2 are evaluated as Integers.
Description
A bitwise XOR is performed and the result is optionally stored into Result.
19.6.148 Zero (Constant Zero Integer)
Syntax
Zero => Integer
Description
The Zero operator returns an Integer with the value 0. Writes to this object are not allowed. The use
of this operator can reduce AML code size, since it is represented by a one-byte AML opcode.
906 April, 2015 Version 6.0