Class uvm_sequence

• uvm_pkg :: uvm_void

  • uvm_pkg :: uvm_object

    • uvm_pkg :: uvm_transaction

      • uvm_pkg :: uvm_sequence_item

        • uvm_pkg :: uvm_sequence_base

          • uvm_pkg :: uvm_sequence

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Inheritance Diagram of uvm_sequence

CLASS

uvm_sequence #(REQ,RSP)

The uvm_sequence class provides the interfaces necessary in order to create streams of sequence items and/or other sequences.

Parameters

Name	Default value	Description
REQ	uvm_sequence_item
RSP	REQ

Variables

Name	Type	Description
param_sequencer	sequencer_t
req	uvm_sequence_item	The sequence contains a field of the request type called req. The user can use this field, if desired, or create another field to use. The default do_print will print this field.
rsp	uvm_sequence_item	The sequence contains a field of the response type called rsp. The user can use this field, if desired, or create another field to use. The default do_print will print this field.

Typedefs

Name	Actual Type	Description
sequencer_t	uvm_sequencer_param_base#(REQ, RSP)

Constructors

function new ( string name )

Creates and initializes a new sequence object.

Functions

virtual function void send_request ( uvm_sequence_item request, bit rerandomize )

This method will send the request item to the sequencer, which will forward it to the driver. If the rerandomize bit is set, the item will be randomized before being sent to the driver. The send_request function may only be called after uvm_sequence_base::wait_for_grant returns.

function REQ get_current_item ( )

Returns the request item currently being executed by the sequencer. If the sequencer is not currently executing an item, this method will return null .

The sequencer is executing an item from the time that get_next_item or peek is called until the time that get or item_done is called.

Note that a driver that only calls get will never show a current item, since the item is completed at the same time as it is requested.

virtual function void put_response ( uvm_sequence_item response_item )

Function- put_response

Internal method.

virtual function void do_print ( uvm_printer printer )

Function- do_print

Tasks

virtual function get_response ( uvm_sequence_item response, int transaction_id )

By default, sequences must retrieve responses by calling get_response. If no transaction_id is specified, this task will return the next response sent to this sequence. If no response is available in the response queue, the method will block until a response is received.

If a transaction_id is parameter is specified, the task will block until a response with that transaction_id is received in the response queue.

The default size of the response queue is 8. The get_response method must be called soon enough to avoid an overflow of the response queue to prevent responses from being dropped.

If a response is dropped in the response queue, an error will be reported unless the error reporting is disabled via set_response_queue_error_report_disabled.

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