AXI Passthrough Agent Class.
The AXI passthrough agent is comprised of other classes which are monitor, runtime master write driver, runtime master read driver, runtime slave write driver, runtime slave read driver.
By default, passthrough agent is in monitor mode.
In order to issue transaction as master, it has to be switched to runtime master mode.
In order to receive transaction, it has to be switched into runtime slave mode.
Please refer PG 267 section about "Useful Coding Guidelines and Examples" for more details.
axi_monitor `AXI_PARAM_ORDER monitor;
axi_slv_wr_driver `AXI_PARAM_ORDER slv_wr_driver;
axi_slv_rd_driver `AXI_PARAM_ORDER slv_rd_driver;
axi_mst_wr_driver `AXI_PARAM_ORDER mst_wr_driver;
axi_mst_rd_driver `AXI_PARAM_ORDER mst_rd_driver;
axi_vif_mem_proxy `AXI_PARAM_ORDER vif_proxy;
axi_passthrough_agent includes a monitor, a master read driver, a master write driver, a slave read driver, a slave write driver and vif_proxy. Please refer below picture for more details about axi_passthrough_agent.
function new ( |
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Constructor to create an AXI Passthrough Agent.~name~ is the instance name and axi_vip_if is the interface in the design. Please see PG267 for how to find the interface in design hierarchy.
virtual function void set_verbosity( |
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Sets the verbosity of the axi_passthrough_agent and all sub classes to determine whether the information will be printed out or not.Refer xil_verbosity for usage
virtual function void set_agent_tag( |
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Sets the tag of the axi_passthrough_agent and all sub classes. If more than one VIPs(in passthrough mode) being used in the same testbench, User can use set_agent_tag with different tag to tell where exactly the log message comes from.
function void set_vif( |
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Sets the Agent's virtual interface. This is the interface that will be monitored and/or driven.
function void set_wr_transaction_depth( |
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Sets the maximum number of WRITE transactions that the axi_passthrough_agent will have in flight at one time.
Returns the maximum number of WRITE transactions that the axi_passthrough_agent will have in flight at one time.
function void set_rd_transaction_depth( |
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Sets the maximum number of READ transactions that the axi_passthrough_agent will have in flight at one time.
Returns the maximum number of READ transactions that the axi_passthrough_agent will have in flight at one time.
Turn on transaction depth check and its monitor's enable_transaction_depth_checks in axi_passthrough_agent
Turn off transaction depth check and its monitor's enable_transaction_depth_checks in axi_passthrough_agent
Enables the monitor in this agent to start collecting data.
Enables runtime master mode READ and WRITE drivers of this agent. Start monitor to collect data. The drivers will only issue axi transactions when the send functions are called.
Enables runtime slave mode READ and WRITE drivers of this agent. start monitor to collect data. The drivers will only issue ready when the send functions are called.
Disables the READ and WRITE drivers of the master. Once disabled, no further action will occur by the drivers.
Allows for all inflight transactions to complete and no new transaction will be serviced. All other transactions will halt.
Resumes processing of the pending transactions.
Disables the READ and WRITE drivers of the slave. Once disabled, no further action will occur by the drivers.
Disables the monitor in this agent from start collecting data. Once disabled, no further action will occur by the monitor.
Convenience function to set the RREADY/BREADY of the master and ARREADY/WREADY/AWREADY of the slave to not apply any backpressure to the simulation.
This API will be used when axi_passthrough_agent is in runtime master mode. It will not return until all the downstream transactions have completed.
virtual task AXI4_READ_BURST ( |
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This task does a full read process for AXI4 when this passthrough agent is in runtime master mode. It is composed of a series of tasks and functions,it first creates transaction from master read driver,sets up the transaction, sends it and then waits till response back. This task returns when the read transaction is complete.
virtual task AXI3_READ_BURST ( |
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This task does a full read process for AXI3 when this passthrough agent is in runtime master mode.It is composed of a series of tasks and functions,it first creates transaction from master read driver,sets up the transaction, sends it and then waits till response back. This task returns when the read transaction is complete.
virtual task AXI4LITE_READ_BURST ( |
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This task does a full read process for AXI4LITE when this passthrough agent is in runtime master mode.It is composed of a series of tasks and functions,it first creates transaction from master read driver,sets up the transaction, sends it and then waits till response back. This task returns when the read transaction is complete.
virtual task AXI4_WRITE_BURST ( |
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This task does a full write process for AXI4. It is composed of a series of tasks and functions.It first creates transaction from master write driver,sets up the transaction, sends it and then waits till response back. This task returns when the complete write transaction is complete.
virtual task AXI3_WRITE_BURST ( |
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This task does a full write process for AXI3.It is composed of a series of tasks and functions.It first creates transaction from master write driver,sets up the transaction, sends it and then waits till response back. This task returns when the complete write transaction is complete.
virtual task AXI4LITE_WRITE_BURST ( |
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This task does a full write process for AXI4LITE.It is composed of a series of tasks and functions.It first creates transaction from master write driver,sets up the transaction, sends it and then waits till response back. This task returns when the complete write transaction is complete.