AxiArbiter< axiCfg, numMasters, maxOutstandingRequests > Class Template Reference

An n-way arbiter that connects multiple AXI master ports to a single AXI slave port. More...

#include <AxiArbiter.h>

Inheritance diagram for AxiArbiter< axiCfg, numMasters, maxOutstandingRequests >:

Public Types
typedef axi::axi4< axiCfg >	axi_
typedef axi_::read::template slave::ARPort	axi_rd_slave_ar
typedef axi_::read::template slave::RPort	axi_rd_slave_r
typedef axi_::write::template slave::AWPort	axi_wr_slave_aw
typedef axi_::write::template slave::WPort	axi_wr_slave_w
typedef axi_::write::template slave::BPort	axi_wr_slave_b

Public Member Functions
typedef	NVUINTW (numMasters_width) inFlight_t
	SC_HAS_PROCESS (AxiArbiter)
	AxiArbiter (sc_module_name name)
void	run_ar ()
void	run_r ()
void	run_aw ()
void	run_w ()
void	run_b ()

Public Attributes
sc_in< bool >	clk
sc_in< bool >	reset_bar
nvhls::nv_array< axi_rd_slave_ar, numMasters >	axi_rd_m_ar
nvhls::nv_array< axi_rd_slave_r, numMasters >	axi_rd_m_r
nvhls::nv_array< axi_wr_slave_aw, numMasters >	axi_wr_m_aw
nvhls::nv_array< axi_wr_slave_w, numMasters >	axi_wr_m_w
nvhls::nv_array< axi_wr_slave_b, numMasters >	axi_wr_m_b
axi_::read::template master	axi_rd_s
axi_::write::template master	axi_wr_s
FIFO< inFlight_t, maxOutstandingRequests >	readQ
Connections::Combinational< inFlight_t >	read_in_flight
FIFO< inFlight_t, maxOutstandingRequests >	writeQ
Connections::Combinational< inFlight_t >	write_in_flight
Connections::Combinational< inFlight_t >	active_write_master
Connections::Combinational< NVUINT1 >	w_last

Static Public Attributes
static const int	kDebugLevel = 5
static const int	numMasters_width = nvhls::log2_ceil<numMasters>::val

Detailed Description

template<typename axiCfg, int numMasters, int maxOutstandingRequests>
class AxiArbiter< axiCfg, numMasters, maxOutstandingRequests >

An n-way arbiter that connects multiple AXI master ports to a single AXI slave port.

Template Parameters

axiCfg	A valid AXI config.
numMasters	The number of masters to arbitrate between.
maxOutstandingRequests	The number of oustanding read or write requests that can be tracked with internal state.

Overview

AxiArbiter connects one or more AXI masters to a single AXI slave. In the case of contention, a round-robin Arbiter selects the next request to pass through.

• The arbiter assumes that responses are returned in the order that requests are sent. Downstream request reordering is currently not supported.
• The AXI configs of all ports must be the same.

Usage Guidelines

This module sets the stall mode to flush by default to mitigate possible RTL bugs that can occur in the default stall mode. If you are confident that this class of bugs will not occur in your use case, you can change the stall mode via TCL directive:

directive set /path/to/AxiArbiter/run_ar/while -PIPELINE_STALL_MODE stall

This may reduce area/power.

Definition at line 58 of file AxiArbiter.h.

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The documentation for this class was generated from the following file:

• AxiArbiter.h