[wiki:Component SocLib Components General Index] 

= !VciSimpleCrossbar Functional Description =

This hardware component is a generic VCI crossbar, it contains two
independant crossbars for VCI commands and VCI responses.

When several initiators try to reach the same target, the arbitration
policy is round-robin.
It gives the system designer a generic "communication black-box" with
a parametrized number of VCI initiator ports (NB_INITIATOR), 
and a parameterized number of VCI target ports (NB_TARGET). 

As any VCI advanced compliant interconnect, this component uses
the MSB bits of the VCI ADDRESS field to route the command packets
to the proper target, thanks to a routing table, implemented as a ROM.
This routing table is build by the constructor from the informations stored in
the [wiki:Component/MappingTable mapping table].
It uses the VCI RSRCID field to route the response packet to the initiator.

= Component definition =

Available in source:trunk/soclib/desc/soclib/vci_simple_crossbar.sd

== Usage ==

!VciSimpleCrossbar has no other parameter than VCI ones, it may be used like others,
see [wiki:SoclibCc/VciParameters SoclibCc/VciParameters]
{{{
Uses( 'vci_simple_crossbar', **vci_parameters )
}}}

= !VciSimpleCrossbar CABA  Implementation =

The caba implementation is in 
 * source:trunk/soclib/systemc/include/caba/interconnect/vci_simple_crossbar.h
 * source:trunk/soclib/systemc/src/caba/interconnect/vci_simple_crossbar.cc

== Template parameters ==

{{{
template<typename vci_param>
}}}

== Constructor parameters ==

{{{
VciSimpleCrossbar(
     sc_module_name name,
     const soclib::common::MappingTable &mt,
     size_t nb_initiator,
     size_t nb_target );
}}}

== Ports ==

 * sc_in<bool> '''p_resetn''' : Global system reset
 * sc_in<bool> '''p_clk''' : Global system clock
 * soclib::caba::!VciTarget<vci_param> '''p_from_initiator[]''' : Ports from VCI initiators
 * soclib::caba::!VciInitiator<vci_param> '''p_to_target[]''' : Ports to VCI targets