SystemVerilog OOP Ovm Features Summary

OVM Features Summary Prepared by: Amal Khailtash

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

SystemVerilog OOP and Classes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

SystemVerilog OOP and Classes (continued…) ,[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. class Complex; real re; real im; function new( real r, real i ); this.re = r; this.im = i; endfunction : new function Complex add( Complex c ); Complex result; result.re = this.re+c.re; result.im = this.im+c.im; return result; endfunction : add function string toString; string s; $sformat( s, "(%0.3f %s %0.3fj)", this.re, (this.im<0?"-":"+"), (this.im<0?-this.im:this.im) ); return s; endfunction : toString endclass : Complex program test; initial begin Complex a = new(1.0,-1.0); Complex b = new(2.0,+1.0); $display( “a = %s", a.toString() ); $display( “b = %s", b.toString() ); Complex x = new(0.0,0.0); x = a.add( b ); $display( “x = %s", x.toString() ); end endprogram : test Output: # a = (1.000 - 1.000j) # b = (2.000 + 1.000j) # x = (3.000 + 0.000J) // Inheritance class SpecificComplex extends Complex; int flag; function new( real r, real i, bit f ); super.new( r, i ); this.flag = f; endfunction : new; endclass : SpecificComplex

SystemVerilog OOP and Classes (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. // EBNF overload_declaration : ‘bind’ overload_operator ‘function’ data_type function_identifier ‘(‘ overload_proto_formals ‘)’ ‘;’ overload_operator : ‘+’ | ‘++’ | ‘–’ | ‘--’ | ‘*’ | ‘**’ | ‘/‘ | ‘%’ | ‘==‘ | ‘!=‘ | ‘<‘ | ‘<=‘ | ‘>’ | ‘>=‘ | ‘=‘ overload_proto_formals : data_type (‘,’ data_type)* // bind + operator to functions bind + function Complex cadd1(Complex, Complex); bind + function Complex cadd2(Complex, real); bind + function Complex cadd3(Complex, int); … … function Complex cadd1( Complex a, Complex b ); return a.add(b); endfunction cadd function Complex cadd2( Complex a, real r ); Complex b = new Complex( r, 0.0 ); return a.add(b); endfunction cadd function Complex cadd3( Complex a, int i ); Complex b = new Complex( real’(i), 0.0 ); return a.add(b); endfunction cadd

SystemVerilog OOP and Classes (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. // Abstract Virtual Virtual class GenericPacket; virtual task Transmit(); // no implementation endclass : GenericPacket; class TCPPacket extends GenericPacket; // Transmit a TCP packet virtual task Transmit(); endtask : Transmit endclass : TCPPacket class UDPPacket extends GenericPacket; // Transmit a UDP Packet virtual task Transmit(); endtask : Transmit Endclass : UDPPacket GenericPacket gp; TCPPacket tp = new; // instance of TCPPacket UDPPakcet up = new; // instance of UDPPacket // ERROR: Cannot create and instance of virtual class! // gp = new; // ERROR: No implementation for Transmit in gp! // gp.Transmit(); // ERROR: Cannot assign base class object to child! // tp = gp; gp = tp; gp.Transmit(); // Sends a TCPPacket gp = up; gp.Transmit(); // Sends a UDPPacket

SystemVerilog OOP and Classes (continued…) ,[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. class stack #(type T = int); local T items[$]; task push( T a ); items.push_front(a); endtask : push task pop( ref T a ); a = items.pop_front(); endtask : pop endclass : stack program test; initial begin stack #(int) is = new; stack #(real) rs = new; for( int i=0; i<10; i++ ) begin $display( "Pushed -> %0d : %0.3f", i, i*3.14 ); is.push( i ); rs.push( i*3.14 ); end $display( "--------------------" ); for( int i=0; i<10; i++ ) begin int x; real y; is.pop(x); rs.pop(y); $display( "Popped -> %0d : %0.3f", x, y ); end end endprogram : test # Pushed -> 0 : 0.000 # Pushed -> 1 : 3.140 # Pushed -> 2 : 6.280 # Pushed -> 3 : 9.420 # Pushed -> 4 : 12.560 # Pushed -> 5 : 15.700 # Pushed -> 6 : 18.840 # Pushed -> 7 : 21.980 # Pushed -> 8 : 25.120 # Pushed -> 9 : 28.260 # -------------------- # Popped -> 9 : 28.260 # Popped -> 8 : 25.120 # Popped -> 7 : 21.980 # Popped -> 6 : 18.840 # Popped -> 5 : 15.700 # Popped -> 4 : 12.560 # Popped -> 3 : 9.420 # Popped -> 2 : 6.280 # Popped -> 1 : 3.140 # Popped -> 0 : 0.000

SystemVerilog OOP and Classes (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],virtual class shape; function new(); $display( “Cannot instantiate shape!” ); endfucntion : new virtual function area(); endfunction : area endclass shape; class square extends shape; real side; function new(real s); this.side=s; endfunction : new virtual function real area(); return side*side; endfucntion : area endclass : square class circle extends shape; real radius; function new(real r); this.radius=r; endfunction : new virtual function real area(); return 3.1415*radius*radius; endfucntion : area endclass : circle class factory; static function create_shape( string shape_name. real param ); case( shape_name ) “ circle” : begin circle sh; sh=new(param); return sh; end “ square” : begin squere sh; sh=new(param); return sh; end endcase endfunction : create_shape endclass : factory program top initial begin shape a = factory::create_shape(“square”, 10.0); shape b = factory::create_shape(“circle”, 10.0); $display( a.area() ); $display( b.area() ); end endprogram : top

SystemVerilog OOP and Classes (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is OVM? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Classes (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Class Hierarchy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. Association Composition Aggregation Dependence Generalization (Inheritance) Association

OVM Class Hierarchy (continued…) Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Class Hierarchy (continued…) ,[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Class Hierarchy (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Class Hierarchy (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Class Hierarchy (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Class Hierarchy (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Class Hierarchy (continued…) ,[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Class Hierarchy (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Class Hierarchy (continued…) ,[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Class Hierarchy (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Fundamentals ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OSCI TLM ,[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OSCI TLM (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OSCI TLM (continued…) ,[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. uni-if blocking_put put(T) nonblocking_put try_put(T), can_put() put put(T), try_put(T), can_put() blocking_get get(T) nonblocking_get try_get(T), can_get() get get(T), try_get(T), can_get() blocking_peek peek(T) nonblocking_peek try_peek(T), can_peek() peek peek(T), try_peek(T), can_peek() blocking_get_peek get(T) peek(T) nonblocking_get_peek try_peek(T), can_peek() try_get(T), can_get() get_peek get(T), try_get(T), can_get() peek(T). try_peek(T), can_peek() analysis write(T)

OSCI TLM (continued…) ,[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. bi-if blocking_master put(REQ) get(RSP) peek(RSP) nonblocking_master try_put(REQ), can_put() try_get(RSP), can_get() try_peek(RSP), can_peek() master put(REQ), try_put(REQ), can_put() get(RSP), try_get(RSP), can_get() peek(RSP), try_peek(RSP), can_peek() blocking_slave get(REQ) peek(REQ) put(RSP) nonblocking_slave try_get(REQ), can_get() try_peek(REQ), can_peek() try_put(RSP), can_put() slave get(REQ), try_get(REQ), can_get() peek(REQ), try_peek(REQ), can_peek() put(RSP), try_put(RSP), can_put() blocking_transport transport(REQ,RSP) nonblocking_transport nb_transport(REQ,RSP) transport transport(REQ,RSP) nb_transport(REQ,RSP)

Ports, Exports and Implementation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. port analysis port port export implementation export

Ports, Exports and Implementation (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. put_export get_peek_export port export port imp get_port put_port tlm_fifo export port export put port put export put imp get_peek imp get_peek export get port put port I T T I I T T I a b c X y d e ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],tlm_fifo

OVM Building Blocks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Building Blocks (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

OVM Building Blocks (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. agent DUV IF VIF config VIF analysis sequencer driver monitor

OVM Building Blocks (continued…) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

Structure of OVM Test-Benches ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization. Top test2 test1 DUV Clock/Reset IF IF IF VIF env1 VIF VIF env2 agent1 agent2 agent3

OVM Component Phases ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Report simulation results. function report Check simulation results. function check Collect information from run phase. function extract This is where the main guts of a component functionality resides. It can consume time and can spawn other processes. Stops when global_stop_request is called. task run Called before start of simulation. Can be used for printing banners, initializing memories, … function start_of_simulation Final configuration, topology, connection and integrity checks function end_of_elaboration Used for connecting ports, exports and implementations function connect Used for creation of components and component hierarchies function build Descripton Type Phase

References and Examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Company Confidential. Distribution of this document is not permitted without written authorization.

References and Examples (continued…) ,[object Object],my_test my_env seq_item_export seq_item_port dut_if vif dut my_sequencer my_driver

SystemVerilog OOP Ovm Features Summary

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