The uvm_sequence class provides the interfaces necessary in order to create streams of sequence items and/or other sequences.
| uvm_sequence #(REQ,RSP) | ||||||||||||||||||||||
| The uvm_sequence class provides the interfaces necessary in order to create streams of sequence items and/or other sequences. | ||||||||||||||||||||||
| Class Hierarchy | ||||||||||||||||||||||
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| Class Declaration | ||||||||||||||||||||||
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| Methods | ||||||||||||||||||||||
| new | Creates and initializes a new sequence object. | |||||||||||||||||||||
| send_request | This method will send the request item to the sequencer, which will forward it to the driver. | |||||||||||||||||||||
| get_current_item | Returns the request item currently being executed by the sequencer. | |||||||||||||||||||||
| get_response | By default, sequences must retrieve responses by calling get_response. | |||||||||||||||||||||
function void send_request( uvm_sequence_item request, bit rerandomize = 0 )
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 task get_response( output RSP response, input int transaction_id = -1 )
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 recieved.
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.
The uvm_object class is the base class for all UVM data and hierarchical classes.
virtual class uvm_object extends uvm_void
The uvm_transaction class is the root base class for UVM transactions.
virtual class uvm_transaction extends uvm_object
The base class for user-defined sequence items and also the base class for the uvm_sequence class.
class uvm_sequence_item extends uvm_transaction
The uvm_sequence_base class provides the interfaces needed to create streams of sequence items and/or other sequences.
class uvm_sequence_base extends uvm_sequence_item
The uvm_sequence class provides the interfaces necessary in order to create streams of sequence items and/or other sequences.
virtual class uvm_sequence #( type REQ = uvm_sequence_item, type RSP = REQ ) extends uvm_sequence_base
Creates and initializes a new sequence object.
function new ( string name = "uvm_sequence" )
This method will send the request item to the sequencer, which will forward it to the driver.
function void send_request( uvm_sequence_item request, bit rerandomize = 0 )
Returns the request item currently being executed by the sequencer.
function REQ get_current_item()
By default, sequences must retrieve responses by calling get_response.
virtual task get_response( output RSP response, input int transaction_id = -1 )
This task issues a request to the current sequencer.
virtual task wait_for_grant( int item_priority = -1, bit lock_request = 0 )