Changes between Initial Version and Version 1 of Component/Vci Initiator Transactor

Timestamp:

Feb 24, 2010, 10:56:50 PM (16 years ago)

Author:

alinevieiramello@…

Comment:

--

Component/Vci Initiator Transactor

@@ +1 @@
+[wiki:Component SocLib Components General Index] 
+
+= !VciInitiatorTransactor =
+
+== 1) Functional Description ==
+
+All VCI commands received on the CABA interface are registered in a buffer indexed by the TRDID field. Each entry in this Pending_Transaction_Buffer contains a transaction status, a transaction time, and enough space to store a complete VCI TLM-DT transaction payload. 
+As for any TLM-DT initiator, the behavior() sc_thread associated to the VciInitiatorTransactor is permanently running. It is descheduled twice per simulated cycle to drive the CK signal on the CABA interface. It implement the same look-ahead mechanism as any TLM-DT initiator to send NULL messages with a bounded period when there is no regular (Read or Write) VCI transactions. 
+Regarding the VCI command, the behavior() thread read the command signals (cycle per cycle), on the CABA ports,  and stores a complete transaction payload in the Pending_Transaction_Buffer. When the transaction is completed, the behavior() thread calls the nb_transport_fw() method on the TLM-DT port.
+
+[[Image(initiator_vci_transactor.png, nolink)]]
+
+Regarding the VCI response, the interface nb_transport_bw() method updates the status of the proper entry in the Pending_Transaction_Buffer when a response is received on the TLM-DT port. This response is then transmitted (cycle per cycle) by the behaviour() thread on the CABA ports.
+If the VCI initiator can receive interrupts, the transactor provides an optional service of translation : When an IRQ is received on the TLM-DT IRQ port (by the interface nb_transport_fw() method)  this information is registered, and the IRQ is transmited on the IRQ CABA port by the behaviour() thread.
+
+== 2) Implementation ==
+
+=== template parameters ===
+
+This component have two template parameters, defining respectively the width of the CABA and TLM-DT VCI parameters.
+{{{
+template<typename vci_param-caba, typename vci_param_tlmdt>
+}}}
+ 
+=== sources ===
+
+ * interface : source:trunk/soclib/soclib/module/network_component/vci_initiator_transactor/tlmdt/source/include/vci_initiator_transactor.h
+ * implementation : source:trunk/soclib/soclib/module/network_component/vci_initiator_transactor/tlmdt/source/src/vci_initiator_transactor.cpp
+
+=== Constructor parameters ===
+
+{{{
+VciInitiatorTransactor(
+     sc_module_name name,  // Instance name
+     size_t n_irq);        // optional : number of interruption ports (default = 0)
+}}}
+
+
+=== CABA Ports ===
+
+ * sc_out<bool> '''p_resetn''' : hardware reset
+ * sc_out<bool> '''p_clk''' :  clock
+ * sc_out<bool> '''*p_irq_initiator''' : IRQ initiator ports (from transactor to CABA initiator)
+ * VciTarget<vci_param_caba> '''p_vci_target''' : VCI target port (from CABA initiator to transactor)
+
+=== TLM-DT Ports ===
+
+ * '''p_vci_initiator''' : VCI initiator port (from transactor to TLM-DT platform)
+ * '''*p_irq_target ''' : IRQ target ports (from TLM-DT platform to transactor)