Section: TLM Interfaces

The UVM TLM library defines several abstract, transaction-level interfaces
and the ports and exports that facilitate their use.
Each TLM interface consists of one or more methods used to transport data,
typically whole transactions (objects) at a time. Component designs that
use TLM ports and exports to communicate are inherently more reusable,
interoperable, and modular.

The UVM TLM library specifies the required behavior (semantic) of each
interface method. Classes (components) that implement a TLM interface
must meet the specified semantic.

Topic: TLM1

The TLM1 ports provide blocking and non-blocking pass-by-value
transaction-level interfaces.
The semantics of these interfaces are limited to message passing.

Topic: TLM2

The TLM2 sockets provide blocking and non-blocking transaction-level interfaces
with well-defined completion semantics.

Topic: Sequencer Port

A push or pull port, with well-defined completion semantics.
It is used to connect sequencers with drivers and layering sequences.


Topic: Analysis

The ~analysis~ interface is used to perform non-blocking broadcasts of
transactions to connected components.  It is typically used by
such components as monitors to publish transactions observed on a bus
to its subscribers, which are typically scoreboards and response/coverage
collectors. 

(see uvm_ref_tlm_analysis_if.gif)