the uvm_event class makes it easy by providing uvm_event_pool. Eventually, everything in UVM is derived from this base class, including uvm_sequence_item. This class will also need to be able to get information from the config_db using hierarchical paths, and plain old uvm_objects don't have hierarchy. e. uvm_object¶ class uvm. UVM TestBench to verify Memory Model. Share. Example 1 - Standard new() constructor for UVM components For transactions (data objects), each object is a unit of data with multiple fields, and transactions do not have a parent. 2? I tried the following, which looked like it may work. Objections provide a facility for coordinating status information between two or more participating. Imagine a UVM sequence generating 20-25 SIZED Ethernet packets followed by a PAUSE packet followed by 30-40 QTAGGED packets. Implement the function "create()" `define m_uvm_object_create_func(T) function uvm_object create (string name=""); T tmp; `ifdef. They are distinct objects. We would like to show you a description here but the site won’t allow us. Nested classes are fully supported by SystemVerilog. e. virtual function uvm_object. The constructor of uvm_component adds a uvm_component parent argument which is used to create. Such a configuration database allows us to store different configuration settings under different names. This is useful when you want to affect the with in a particular uvm_object can can be made scalable by overriding the do_print() method. {"payload":{"allShortcutsEnabled":false,"fileTree":{"distrib/src":{"items":[{"name":"base","path":"distrib/src/base","contentType":"directory"},{"name":"comps","path. UVM_Object: uvm_object is basically the main class. Gets the data, if any, provided by the last call to trigger. `uvm_object_utils_begin. wait_trigger_data. To avoid the overhead of creating an instance of every component and object that get registered, the factory holds lightweight wrappers, or proxies. This code follows the convention that member variables start with the prefix of. event_object_h =. Hi, QIN. Overall Implementation To link the RAL with the configuration object, we initialize the registers in every configuration object as handlesThe callback pool is a singleton object that can be accessed by calling uvm_callbacks#(T)::get_global_pool() or uvm_component::get_callback_pool(), where T is the type of the UVM class or component. Uvm_components contains all methods the uvm_objects have. Yes, the UVM create() method calls new() constructor on the object without any arguments (string name is not passed in there). UVM 상세 사항에 대하여 언급하지 전에, 간단한 Testbench를 다시 작성해 봅니다. Let’s look at how we. The important thing to remember is that each entry needs a unique field name or label (if the global scope is being used), or the path needs toThese macros are used to start sequences and sequence items on default sequencer, m_sequencer. 613. A flat uvm_config_db with wildcard scopes and many entries can be a performance hog. UVM automation macros also include mechanisms to pack class variables into a bit or byte stream, and unpack a bit stream and populate the class contents. uvm_object. You can use wildcards in the scope strings, but limit them to the end of the string to help performance. g. virtual function void print_object (string name, uvm_object value, byte scope_separator = ” . Classes deriving from uvm_object must implement the pure virtual methods such as create and get_type_name. By applying stimulus to the register model, the actual design registers will exhibit the changes applied by the stimulus. The UVM factory allows an object of one type to be overridden with an object of its derived type without changing the testbench structure. A utils macro should be used inside every user-defined class that extends uvm_object directly or indirectly, including uvm_sequence_item and uvm_component. 02. The function that is actually called depends on the context where the macro is used. FollowSimple (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. UVMRegBlock(name='', has_coverage=0) [source] ¶. We would like to show you a description here but the site won’t allow us. The register model can be used to read and write registers in the DUT, including signals connected to those registers. do_pack. uvm_resource_db; uvm_config_db; Passing interface handle and two agent example; UVM testbench Top; UVM Test; UVM Environment; UVM Sequence Items; UVM Driver;The uvm_driver is parameterized to accept a class object of the type my_data and the driver is expected to unpack this class object and drive the signals appropriately to the DUT via the interface. logger. 08 Subroutines 01. Bases: uvm. As I understood for all items inherited from uvm_component, they all need uvm_component parent as part of constructor input argument. SNUG 2012 6 The OVM/UVM Factory & Factory OverridesThe UVM register layer acts similarly by modeling and abstracting registers of a design. Unlike registers, memories are not mirrored because of the potentially large data space: tests that walk the entire memory space would negate any benefit from sparse memory modelling techniques. print_topology() or factory. The create () method essentially just calls uvm_factory::create_object_by_type (). The driver receives the item and drives it to the DUT through a virtual interface. Say the object is "my_tb". 02. In a previous article , print, do_print and use of automation macros to print were discussed. Please see Register Abstraction for how each property is packed. uvm_object ¶. UVM tutorial for beginners Introduction Introduction to UVM UVM TestBench TestBecnh Hierarchy and BlockDiagram UVM Sequence item Utility & Field Macros Methods with example Create Print Copy Clone Compare Pack UnPack UVM Sequence Sequence Methods Sequence Macros Sequence Example codes UVM Sequence control UVM. uvm_component::set_inst_override (relative_inst_path, original_type_name, override_type_name) The fourth method is using the set_inst_override function of the uvm_component. uvm_object is the one of the base classes from where almost all UVM classes are derived. Stimulus는 아직 작성하지 않고, testbench 골격만을 작성해 봅니다. uvm_object is the main class in which common functions to print, copy, and compare two objects of the same class are defined. It helps increase flexibility and resuability of our testbench. It consists of all the basic methods, macros, identification fields in it. One of the classes contains a handle for the other class. base. In our case, two uvm_queues are created; one for the "jb_if1" and the other for the "jb_if2". For convenience, you can use the subtype, uvm_in_order_built_in_comparator # (T) for built-in types. Test program작성 및 script 작성. Each resource has a set of scope. ) and random seeding were defined in it. e. Why uvm_object constructors are now mandatory. Create uvm_object base class. There are different variations to this macro, just like `uvm_do_*. argument object. Because this will be created during the run_phase it can't extend uvm_component, and it wouldn't make sense for this class to have phases. It is an abstract class with no data members or functions. The update can be performed using the using the physical interfaces (frontdoor) or uvm_reg::poke () (backdoor) access. Class: UVMObjection. data = 2; t1. 03 Operators 01. The create() method essentially just calls uvm_factory::create_object_by_type(). Share. g. In order to create a user-defined sequence : Derive from uvm_sequence base class with a specified data object type. UVM is based on Open Verification Methodology (OVM) and Verification Methodology Manual (VVM). The factory (or to be precise, uvm_component_registry) will call new on behalf of you. This class provides base functionality for both user-defined RegModel test sequences and “register translation sequences”. The handle to the uvm_resource object is stored in two kinds of uvm_queues. env. The uvm_object_registry serves as a lightweight proxy for a uvm_object of type T and type name Tname, a string. UVM Testbench 작성 00장 둘러보기 00. Bases: object. uvm_config_db#(TYPE)::set(this,"*. To do this job easier, uvm has predefined macros. The handle to the uvm_resource object is stored in two kinds of uvm_queues. Block abstraction base class. A environment class can also be. Intro. ; The user-defined subscriber is derived from uvm_subscriber that must define the write method (A write method is a pure virtual method that is declared in the uvm_subscriber class). virtual function void print_string (string name, string value, byte scope_separator = “. UVM has a rich reporting facility. uvm event callbacks are an alternative to using processes that wait on events. `uvm_create (Item/Seq) This macro creates the item or sequence. This is particularly useful when dealing with serial forms of communication like SPI, I 2 C and RS-232. Pack. The most common UVM macros are: uvm_component_utils: registers a new class type when the class derives from the class uvm_component; uvm_object_utils: similar to uvm_component_utils, but the class is derived from the. Does an abstract class (virtual class. The scope, which is a uvm_component handle plus a string. Line 11-Line 15 Use the UVM functions to automatically implement functions such as copy(), compare(), print(), pack(), and so on. UVM_WARNING @ 0: reporter [TPRGED] Type name 'packet2mem_comp_Str' already registered with factory. OOP design patterns take reuse another step. This makes them more flexible, and able to work on a range of data types instead of just a single one. new (name, parent); endfunction. The monitor captures values on the DUT's input and output pin. 2 Class Reference, but is not the only way. UVMObject (name: str) [source] ¶ Bases: sv_obj. The uvm_config_db class provides a convenience interface on top of the uvm_resource_db to simplify the basic interface used for uvm_component instances. 1. Inside the test class, another uvm_config_db method i. After the utility macro are the field automation macros in the form ‘uvm_field_*(data member, flag). The first kind of queues store the handles to the uvm_resource objects that have the common field_name. Its intention is to print the name of the type of a given object instance. This object must be factory-enabled. Skills Needed: Students should have experience with object-oriented programming, C/C++, or. The utils macros define the infrastructure needed to enable the object/component for correct factory operation. That means the default value is going to be used in new(). com Welcome to our site! EDAboard. wait_ptrigger_data. Calling Functions. You can: Derive your object_a from uvm_report_object instead of uvm_object. The factory is a special class in UVM that creates an instance for you of whatever uvm_object or uvm_component type you specify. uvm_comparer is the standalone class used to set a policy for doing comparisons and determines how miscompares are counted. After new'ing , it uses set_name() to assign the appropriate value to the name string. It can contain registers, register files, memories and sub-blocks. These loggers are part of the cocotb logging system. Connect and share knowledge within a single location that is structured and easy to search. This means that all uvm_components are report objects, which is why you must call super(). The print method is used to deep print UVM object class properties in a well-formatted manner. 1 Answer. If you want to use the fifo path, you need to create and connect a generic port in the driver class. com Each component goes through a pre-defined set of phases, and it cannot proceed to the next phase until all components finish their execution in the current phase. Supposed that your component name is "comp" in ENV, and the env is named "env" in the uvm_test, so in test bench top module, you should use below code to get the configuration handle. by extending the uvm_object or the uvm_sequence_item base class. We have seen put and get methods to operate with only one outstanding transaction at a time i. As you see the following diagram, the uvm_object::copy() calls the __m_uvm_field_automation() with UVM_COPY as the value of the what__. The print method is used to deep print UVM object class properties in a well-formatted manner. Unfortunately, SystemVerilog does not provide a good way to save Creates a new event object. So, a data class derived from uvm_sequence_item or uvm_component will have access to the print() function as well. The do_pack() is used to pack each propery of the jelly_bean_transaction object using a uvm_packer policy object. 03. uvm_object-based class declarations may contain one of the above forms of utility macros. Classes deriving from UVMObject must implement methods such as create and get_type_name. We use uvm_config_db::set to put something into the database and uvm_config_db::get to retrieve information from the database. UVM Field Macros. However, I downloaded the UVM library from accelera's website and looked at the code and it looks like it's just some SystemVerilog. In Manufacturing, Casting is a process in which liquid metal is converted into the desired object. That is different from the strategy that you might choose in order to drive signals. uvm_config_db#(TYPE)::set(this,"*. It also becomes easier to connect to design regardless of the number of ports it has since that information is encapsulated in an interface. without modifying the object class being operated on. After all, you just set the value of data and id with the name “t1”. The uvm_object class is the base class for all UVM data and hierarchical classes. This class will also need to be able to get information from the config_db using hierarchical paths, and plain old uvm_objects don't have hierarchy. 3. The UVM is completely described in the IEEE 1800. Create and register the callback object. Note that all the functions are static and must be called using the :: scope operator. 01 SystemVerilog Testbench 구조 01. See `uvm_object_utils and `uvm_component_utils for details. That method looks through an array of type overrides to see if you ever called set_type_override() for this class, then calls new() for. The uvm_object class is the base class for all uvm hierarchical classes such as uvm_report_object, uvm_component, uvm_transaction, uvm_sequence_item, uvm_sequence etc. zhang@amd. Core class based operational methods (create, copy,. 02. Instances of these lightweight proxies, representing every uvm_object-based and uvm_component-based object available in the test environment, are registered with the uvm_factory. get_next_item (t). We would like to show you a description here but the site won’t allow us. 0a version of the standards document: “The goal is to allow stimulus and tests, including coverage and results checking, to be. The recommended method in UVM for creating components or transaction objects is to use the built-in method::type_id::create () instead of calling the constructor new () directly. As the name suggests, it keeps a track of the sequences that are registered with it, and calls them a number of times in a random fashion. T(semaphore)) semaphore_pool To get the handle of. 1 Answer. Typically configuration classes and data objects are derived from this class and are passed to different testbench components during the course of a simulation. pyuvm implements the most often-used parts of the UVM while taking advantage of the fact that Python does not have strict typing and. ” ) Prints an object and it is recursed depending on depth knob setting. Here is a transaction class. This guide is a way to apply the UVM 1. Read more: UVM Object [uvm_object] In my last post, I recommended that you give every SystemVerilog object either a unique ID or name. The clone () method was declared in uvm_object and returns a handle of type uvm_object. All counts are cleared and the any processes waiting on a call to wait_for(UVM_ALL_DROPPED, uvm_top) are released. The proxy enables efficient registration with the uvm_factory. UVMFactory is used to create objects of type UVMComponent and UVMObject (and their derived user-defined types). First, let's. drop_objection (uvm_object obj = null, string description = ” “, int count = 1) Drops number of objections for corresponding object with default count = 1 The copy method does a copy of the mentioned object. UVM objects are. Divide the DB into smaller domains by grouping values into config objects. The lack of typing means a lack of parameterized ports, exports, and uvm_tlm_fifos. In our case, two uvm_queues are created; one for the "jb_if1" and the other for the "jb_if2". 1, the presence of such a constructor is not enforced by the library and they are technically optional. The UVM TLM library defines several abstract, transaction-level interfaces and the ports and exports that facilitate their use. Improve this answer. For example, if the knobs says we're in a certain mode, and the sequence shall be constrained according to the mode, then the knobs must be available at sequence pre/post/randomize(), it is too late to read them from a. Similarly, in the second line, the all to the "uvm_root" static get method returns a reference to the top-level "uvm_root" object and we are calling the "set_timeout" method on that object. Here are my codes: typedef class tmp_for_test; class config_agent extends uvm_agent; typedef config_agent this_type; tmp_for_test #(int, byte) tmp_f_t; // Provide implmentations of virtual me. Implement the callback method. e it is allowed to send the transaction Only after consumption of the previously sent transaction, in this case, the sender and receiver must be in sync else. event_object_h =. If you are looking to print the entire topology, create a uvm_table_printer in your base test, and then use it in your end_of_elaboration_phase to print your class heirarchy in table format. Built in types (such as ints, bits, logic, and structs) can be compared using the default values for comp_type, convert, and pair_type. The uvm_subscriber is derived from uvm_component and adds up the analysis_export port in the class. 02. uvm_config_db#(TYPE)::set(this,"*. uvm_object_utils() is used to register a class as a UVM object, which is a generic container for data used in a UVM testbench. Built in types (such as ints, bits, logic, and structs) can be compared using the default values for comp_type, convert, and pair_type. Understand the UVM hierarchies and various components needed to build a comprehensive UVM Testbench; Design and implement various testbench components, such as driver, monitor, sequencer, agent, environment, scoreboard, coverage, and environment. This port contains a list of analysis exports that are connected to it. To maintain uniformity in naming the components/objects, all the component/object name’s are starts with mem_ *. One thing that always confuses me: is whether add uvm_component parent in the class constructor of UVM objects or not. A grandparent class of uvm_sequence_item is uvm_transaction, which contains the following field definitions: class uvm_transaction extends uvm_object; const uvm_event_pool events = new; uvm_event begin_event; uvm_event end_event; //. A policy class to allow pairs of transactions to be handled as a single uvm_object type. Constraints may be added via inheritance in a derived class. Learn more about TeamsT – Object type where user-defined callback is used and it must be derived from uvm_object. svh compiler cannot resove monitor as it doesn't know that type. Blocks ¶. The do_pack() is used to pack each propery of the jelly_bean_transaction object using a uvm_packer policy object. uvm_resource_pool rp = uvm_resource_pool::get(); uvm_resource#(T) _type = new(); uvm_queue#(uvm_resource_base) q; q =. Factory is a singleton object and there is only one instance of the factory in a UVM environment. In a previous article, copy, do_copy and use of automation macros to print were discussed. `uvm_object_param_utils. A cleaner implementation would have been for uvm_component_registry to be its own class. Users can create/use packers anywhere in their code, not just in the context of a UVM object. KEY(int),. uvm_reg::update. The first step is to use macros to register all the class types with the factory. The UVM TLM library defines several abstract, transaction-level interfaces and the ports and exports that facilitate their use. This class constructor has a string name argument which is used for messaging and debugging. A uvm_queue is created for every unique field_name. pseudo code looks like this: class seq_item extends uvm_sequence_item; rand class_a a; rand class_b b; endclass// seq_item class class_a extends uvm_object; rand bit field_1; rand bit field_2; endclass//class_a class class_b. METHOD – callback method call to invoke. Must define a pool before use: typedef uvm_pool(. Using UVM in SystemC is a tutorial paper that presents the benefits and challenges of applying the Universal Verification Methodology (UVM) to SystemC-based verification environments. Why the factory is important, though, and how it helps us achieve that goal may be. It is intended for verification engineers who want to use UVM 1. It is the base class for all UVM data and hierarchical classes. Registration: While defining a class , its type has to be registered with the uvm factory. uvm_object The primary role of uvm_object class is to define a set of common utility functions like print, copy, compare and record which can be availed by any other class in a UVM testbench to save effort. 2) Add "-clean" to the irun command. The uvm_void class is the base class for all UVM classes. Blocks. Using clone method. Follow. March 24, 2021. An uvm_component inherits from. An appropriate `uvm_field_* macro is required to use based on the data type of class properties. If you are using OVM/UVM then get_full_name() / get_name() will return the name of the component in the testbench hierarchy. UVM uses the concept of a factory where all objects are registered with it so that it can return an object of the requested type when required. The configuration object also allows for a higher-level view of the DUTs functions, providing test writers with an abstracted constraint layer not tied to the underlying registers. // For example, "set_type_override_by_type" is actually a function defined in the class uvm_factory // A wrapper function. ”. answered Jun 19, 2014 at 23:32. I'm looking for a way to get all instances of a given uvm_object class, preferably filtering with hierarchy/scope and name. The record function of uvm_object calls the do_record. Since the uvm_sequence_item class is extended from the uvm_object class, it inherits the print method which is used to display the class variables. 2. as you can see from your log that isnt the case for IUS. No string-based lookup support for multiple types with the same type name. It consists of all the basic methods, macros, identification fields in it. In other words, uvm_objects are transient, such as transactions that are created when needed and disappear when not used anymore. Then the UVM test bench utilizes virtual interfaces at dynamic driver, monitor class to access static interfaces [3], it retrieves the bind interface instance handle by reading uvm_resouce_db: Figure 2 – connect RTL and UVM by interface bind uvm_pkg::uvm_resource_db#( virtual svt_axi_slave_if)::read_by_name. 1 Answer. gz. Using automation macros. Both the main sequence and the other sequence get an uvm_event with. It attempts to mirror the design registers by creating a model in the verification testbench. The uvm_void class is the base class for all UVM classes. Let’s discuss the macro-based approach in UVM sequence macro and existing methods approach in the uvm_sequence_base class methods section. For transactions, the typical constructor is shown in Example 2. Then,. Object Overriding; UVM Phases; UVM Objections; UVM Object. The create method internally makes a call to the factory to look up the requested type and then. The clone method calls the create() method followed by copy(). class tx_item extends uvm_sequence_item;. 1. Unlike the above three methods, this function takes three strings. This doesn't have any purpose, but serves as the base class for all UVM classes. The record function takes a recording policy object as the argument (line 14). The UVM Test typically performs three main functions: Instantiates the top-level environment, configures the environment (via configuration objects, factory overrides or the configuration database), and applies stimulus by. Unfortunately, SystemVerilog does not provide a good way to saveThere are two important aspects to pay attention to here: Use the `uvm_do_callbacks macro to call the appropriate function from our base callback class ; Use the `uvm_register_cb macro to register the callback class (acme_callback_addr_width) with the given object type (acme_env_config); Step #4: Define custom callback functions. The important thing to remember is that each entry needs a unique field name or label (if the global scope is being used), or the path needs to1 Answer. typedef uvm_object_string_pool #(uvm_event #(uvm_object)) uvm_event_pool; We’ll go in detail of uvm_pool in another post. The do_pack() method is called by the pack(), pack_bytes(), and pack_ints() methods. The reason when case2 work is that P1 is assigned to P2 as P2 handle, so a cast from P2 to P2 itself is always ok. Phases : UVM defines a set of simulation phases that enable users to control the order in which testbench components are created, initialized, and executed. 1 to create reusable and portable testbenches. This improves flexibility and scalability of testbench. This section defines the proxy component and object classes used by the factory. In the UVM, there are mechanisms to automate the retrieval of data from the configuration database. For example: `define STR (str) `"str`". ; Once you convert your testbench from passing individual values to passing config objects, you can see the bigger picture, which is that a testbench is configured and built from the top down, guided by the configuration. Static components & Dynamic components. UVM 1. They are dynamic in nature and have a limited lifetime within the simulation. Let's take an example of three sequences, all derived from the same base_sequence class, as we. This works in conjunction with the Register Adapter, as its bus2reg() function simply grabs the data from the top of its queue and returns its uvm_reg_bus_op object. It supports all methods like copy, compare, clone, print, etc as discussed in the UVM object section. If we already have a data object that we simply want to send to a sequencer, we can use `uvm_send. UVM TestBench to verify Memory Model. To implement some important methods in classes and variables, UVM provides the UVM Macros. UVM 1. The compare method returns 1 if comparison matches for the current object when it is compared with the R. Then you can do: typedef uvm_object_registry# (abc_test_seq,`STR (`SEQ_NAME (abc))) type_id;. They allow access to the functions copy, compare, pack, unpack, record. There are two important parts to using the factory. ; Once you convert your testbench from passing individual values to passing config objects, you can see the bigger picture, which is that a testbench is configured and built from the top down, guided by the configuration. 1 (IEEE 1800. get_trigger_data. Since the RTL code does not know anything about the test class, it uses a null handle, and “uvm_test_top“, the instance name of the test object. The SystemVerilog UVM contains a uvm_printer class, which provides an interface for printing uvm_objects in various formats. In create method, we have to construct a new object of configuration class and update all the important fields and return it. base. This method calls uvm_event_base::wait_ptrigger followed by. uvm_object. The UVM TLM library defines several abstract, transaction-level interfaces and the ports and. This article explains how to use a verbosity threshold to filter messages. UVM factory is a mechanism to improve flexibility and scalability of the testbench by allowing the user to substitute an existing class object by any of its inherited child class objects. Previous Article. UVM Heartbeat Usage. It is an abstract class with no data members or functions. The compare method returns 1 if comparison matches for the current object when it is compared with the R. It is a standardized methodology for verifying digital designs and systems-on-chip (SoCs) in the semiconductor industry. 2 Comments. This flexibility allows comprehensive testing of different configurations using a single, reusable testbench, significantly reducing development time and effort. Place the callback hook. A UVM sequence is just a SystemVerilog object that is constructed by calling new. Macro. This applies to all instances of that component type. 03 Basic UVM Testbench 작성. Define your virtual method, for example wait_state, but leave it empty. These macros can appear anywhere in the declaration space of the class declaration of T and will associate the string S to the object type T. The utils macros define the infrastructure needed to enable the object/component for correct factory operation. We would like to show you a description here but the site won’t allow us. For transactions, the typical constructor is shown in Example 2. base. The call to the "uvm_root" static get method returns a reference to the top-level "uvm_root" object. uvm_reg_block. 1-289-695-1969 shihua. This is applicable for uvm objects and components. uvm_sequence_item class hierarchy As shown in the above diagram, uvm_sequence_item is derived from the uvm_transaction class. If we expand the macro, it will call m_uvm_object_registry_param(T) define where there is a typedef of uvm_object_registry#(T). First, let's. When the factory is called upon to create an object. A message with the UVM_NONE level is. “virtual” keyword is common in all of them. In our case, two uvm_queues are created; one for the "jb_if1" and the other for the "jb_if2". Methods: Description: set(uvm_component cntxt, string inst_name, string field_name, T value); Create a new or update an existing field_name configuration setting based on cntxt and inst_name. Include the class inside the testbench and instantiate an object. You can also use get_id(), get_message() etc. svh" endpackage. 3. You can use the uvm_object_registry (T,S) or uvm_component_registry (T,S) registration macros. The utility macros help to register each object with the factory. The driver code is relatively simple. Here are the general steps to create and use a register. If we already have a data object that we simply want to send to a sequencer, we can use `uvm_send. 03 Operators 01. You always could use 'uvm_field_array_int and a pair of pack/unpack function that transforms the pixel info into an int (you would still have a byte of the int free) and the other way round. UVM REPORTING The uvm_report_object provides an interface to the UVM reporting facility. For Design specification and Verification plan, refer to Memory Model. Length: 4 Days (32 hours) The Universal Verification Methodology (UVM) is the IEEE1800. uvm config db set method void uvm_config_db#(type T = int)::set(uvm_component cntxt, string inst_name, string field_name, T value); Where, T is the type of element being configured. Steps involved are, Write callback class. Then you can do: typedef uvm_object_registry# (abc_test_seq,`STR (`SEQ_NAME (abc))) type_id;. The uvm_driver is parameterized to accept a class object of the type my_data and the driver is expected to unpack this class object and drive the signals appropriately to the DUT via the interface. To avoid the overhead of creating an instance of every component and object that get registered, the factory holds lightweight wrappers, or proxies. You can think of any method call as having an implicit this argument. Some Standard Data Methods of the uvm_object Class By now you might think that these field macros are convenient but not efficient. factory. Every uvm_object instance has a compare() method for performing comparisons with another object.