Advanced Configuration and Power Interface Specification

ACPI Source Language (ASL)Reference
128Bit or Width256Bit. If not specified, Width32Bit is assumed. The bit field name _SIZ 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 FixedDMA macro evaluates to a buffer that contains a Fixed DMA Descriptor (Section 6.4.3).
19.6.50 FixedIO (Fixed IO Resource Descriptor Macro)
Syntax
FixedIO (AddressBase, RangeLength, DescriptorName) => Buffer
Arguments
AddressBase evaluates to a 16-bit integer. It describes the starting address of the fixed I/O range.
The field DescriptorName. _BAS is automatically created to refer to this portion of the resource
descriptor.
RangeLength evaluates to an 8-bit integer. It describes the length of the fixed I/O range. The field
DescriptorName. _LEN is automatically created to refer to this portion of the resource descriptor.
DescriptorName evaluates to a name string which refers to the entire resource descriptor.
Description
The FixedIO macro evaluates to a buffer which contains a fixed I/O resource descriptor. The format
of the fixed I/O resource descriptor can be found in “Fixed Location I/O Port Descriptor ”
(page 347). The macro is designed to be used inside of a ResourceTemplate (page 882).
19.6.51 Fprintf (Create and Store formatted string)
Syntax
Fprintf (Destination, FormatString, FormatArgs) => String
Arguments
Fprintf is a macro that converts the evaluated FormatString into a series of string Concatenate
operations, storing the result in Destination.
FormatString is a string literal which may contain one or more uses of the format specifier, %o, to
indicate locations in the string where an object may be inserted. %o is the only format specifier
supported since the resulting object is a string and type conversion is handled automatically by
Concatenate.
FormatArgs is a comma separated list of Named Objects, Locals, or Args that can be evaluated to a
string. Each argument is added to the FormatString using the Concatenate operation at the location
specified by %o in order of appearance.
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