Table of Contents
- 1 What is the advantage of uvm_component_utils () and Uvm_object_utils ()?
- 2 What is the use of uvm_component_utils?
- 3 What is difference between Uvm_config_db & Uvm_resource_db?
- 4 What is difference between Create and new in UVM?
- 5 What is utility macro?
- 6 What are Macros in Verilog?
- 7 What is the difference between UVM_objects and UVM_components?
- 8 Can the behavior of a UVM testbench be varied without code changes?
What is the advantage of uvm_component_utils () and Uvm_object_utils ()?
What are the advantages of `uvm_component_utils and `uvm_object_utils? These macros are used to register a class with the factory. `uvm_component_utils is used when the class is a component derived from uvm_component , and `uvm_object_utils is used if it’s an object derived from uvm_object .
What is the use of uvm_component_utils?
(1) uvm_components are used to construct the UVM environment. They are used to make testbench components. The registration with the factory is made with the macro `uvm_component_utils.
What is a macro in UVM?
The term ‘macro’ refers to the substitution of a line or a few lines of text code. The directive “`define” creates a macro for substitution code. Once the macro is defined, it can be used anywhere in a compilation unit scope, wherever required.
What is meant by factory override and what are different types of overriding possible with UVM factory?
There are UVM macros that allow classes to be registered with the factory, and methods that allow certain types and instances of class objects to be overridden by its derived types. …
What is difference between Uvm_config_db & Uvm_resource_db?
In particular, uvm_resource_db uses a “last write wins” approach. The uvm_config_db, on the other hand, looks at where things are in the hierarchy up through end_of_elaboration, so “parent wins.” Once you start start_of_simulation, the config_db becomes “last write wins.”
What is difference between Create and new in UVM?
The create function goes through the UVM factory and checks for registered type or instance overrides. The new function is a SystemVerilog constructor for an object and is called everytime an object is to be created (whether through the factory or not).
What is the use of Uvm_object_utils?
The utils macro is used primarily to register an object or component with the factory and is required for it to function correctly. It is required to be used inside every user-defined class that is derived from uvm_object which includes all types of sequence items and components.
What is the difference between Create and new method in UVM?
What is utility macro?
Utility Macros. The utils macros define the infrastructure needed to enable the object/component for correct factory operation.
What are Macros in Verilog?
A macro is a literal name used in a program that is substituted by some value before the program is compiled. Macros are useful as an alias without using program resources. Almost all modern languages, including Verilog, support macro definition.
Why should we register a class with factory?
Having registered your objects and components with the factory, you can now make requests for new objects and components via the factory. Using the factory instead of allocating them directly (via new) allows different objects to be substituted for the original without modifying the requesting class.
Why do we need two macros for UVM_object_utils and component macros?
A more basic reason to have separate `uvm_object_utils and `uvm_component)utils macros is that the factory create methods need to be defined with a hard coded set of arguments for the constructors: a name for a uvm_object and a name and parent for uvm_component.
What is the difference between UVM_objects and UVM_components?
In other words, uvm_objects are transient, such as transactions that are created when needed and disappear when not used anymore. Uvm_components contains all methods the uvm_objects have. e.g. uvm_objects have clone/do_copy virtual methods, that can be used to clone/ do a deep copy of an object.
Can the behavior of a UVM testbench be varied without code changes?
Hence if a UVM testbench and stimulus are architect ed correctly using proper class inheritance and factory registration mechanisms, behavior of testbench can be varied without any code changes across different tests. The other answer has good links to more details about the factory.
How do simplesimple objects use UVM_object_utils?
Simple (non-parameterized) objects use the uvm_object_utils* versions, which do the following: Implements get_type_name, which returns TYPE as a string Implements create, which allocates an object of type TYPE by calling its constructor with no arguments. TYPE’s constructor, if defined, must have default values on all it arguments.