TagInterface class

An interface to a Content-Addressable Memory (CAM) that allows querying for tags and returns the index of the matching tag if found.

For lookups, tag is the query and idx/hit are the results. Only entries with their valid bit set will match during lookups.

For writes, en enables the write, idx is the destination address, tag is the data to write, and hit sets/clears the valid bit (hit=1 marks the entry valid, hit=0 marks it invalid).

Inheritance

Constructors

TagInterface(int idWidth, int tagWidth)
Constructs a new interface of specified idWidth and tagWidth for querying a CAM.

Properties

en → Logic
Enable signal for write operations.
no setter
hashCode → int
The hash code for this object.
no setterinherited
hit → Logic
For lookups: indicates whether a valid match was found. For writes: sets/clears the valid bit (1=valid, 0=invalid).
no setter
idWidth → int
The width of addresses in the memory.
final
idx → Logic
The entry number (index) where the tag was found (lookup) or the destination address (write).
no setter
ports → Map<String, Logic>
Maps from the Interface's defined port name to an instance of a Logic.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
tag → Logic
The "tag" to match (for lookup) or write (for write operations).
no setter
tagWidth → int
The width of data in the memory.
final

Methods

clone() → TagInterface
Makes a copy of this TagInterface with matching configuration.
override
conditionalDriveOther(Interface<DataPortGroup> other, Iterable<DataPortGroup> tags) → Conditional
Makes this conditionally drive interface signals tagged with tags on other.
inherited
conditionalReceiveOther(Interface<DataPortGroup> other, Iterable<DataPortGroup> tags) → Conditional
Makes this signals tagged with tags be driven conditionally by other.
inherited
connectIO(Module module, Interface srcInterface, {Iterable<DataPortGroup>? inputTags, Iterable<DataPortGroup>? outputTags, Iterable<DataPortGroup>? inOutTags, String uniquify(String original)?}) → void
Connects module's inputs, outputs, and inOuts up to srcInterface and this Interface.
inherited
driveOther(Interface<DataPortGroup> other, Iterable<DataPortGroup> tags) → void
Makes this drive interface signals tagged with tags on other.
inherited
getPorts([Iterable<DataPortGroup>? tags]) → Map<String, Logic>
Returns all interface ports associated with the provided tags as a Map from the port name to the Logic port.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
port(String name) → Logic
Accesses a port named name.
inherited
receiveOther(Interface<DataPortGroup> other, Iterable<DataPortGroup> tags) → void
Makes this signals tagged with tags be driven by other.
inherited
setPorts(List<Logic> ports, [Iterable<DataPortGroup>? tags]) → void
Adds a collection of ports to this Interface, each associated with all of tags.
inherited
toString() → String
A string representation of this object.
inherited
tryPort(String name) → Logic?
Provides the port named name if it exists, otherwise null.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited