Advanced Configuration and Power Interface Specification

ACPI Source Language (ASL)Reference
TransmitBufferSize evaluates to a 16-bit integer that specifies the upper limit in bytes of the transmit
buffer that can be optimally utilized while communicating with this device. The bit field _TXL is
automatically created to refer to this portion of the resource descriptor.
ResourceSource is a string which uniquely identifies the UART bus controller referred to by this
descriptor. ResourceSource can be a fully-qualified name, a relative name or a name segment that
utilizes the namespace search rules.
ResourceSourceIndex is an optional argument and is assumed to be 0 for this revision.
ResourceUsage is an optional argument and is assumed to be ResourceConsumer for this revision.
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.
Shared is an optional argument and can be either Shared or Exclusive. If not specified, Exclusive is
assumed. The bit field name _SHR is automatically created to refer to this portion of the resource
descriptor.VendorData is an optional argument that specifies an object to be decoded by the OS
driver. It is a RawDataBuffer. The bit field name _VEN is automatically created to refer to this
portion of the resource descriptor.
Description
The UARTSerialBusV2 macro evaluates to a buffer that contains a UART Serial Bus resource
descriptor (Version 2). The macro is designed to be used inside of a ResourceTemplate
(seeSection 19.3.3 ).
19.6.138 Unicode (String To Unicode Conversion Macro)
Syntax
Unicode (String) => Buffer
Arguments
This macro will convert a string to a Unicode (UTF-16) string contained in a buffer. The format of
the Unicode string is 16 bits per character, with a 16-bit null terminator.
19.6.139 Unload (Unload Definition Block)
Syntax
Unload (Handle)
Arguments
Handle is evaluated as a DDBHandle data type.
Description
Performs a run-time unload of a Definition Block that was loaded using a Load term or LoadTable
term. Loading or unloading a Definition Block is a synchronous operation, and no control method
execution occurs during the function. On completion of the Unload operation, the Definition Block
Version 6.0 899