Entity: axi_dma_desc_mux

• File: axi_dma_desc_mux.v

Diagram

Description

Generics

Generic name	Type	Value	Description
PORTS		2	Number of ports
AXI_ADDR_WIDTH		16	AXI address width
AXIS_ID_ENABLE		0	Propagate AXI stream tid signal
AXIS_ID_WIDTH		8	AXI stream tid signal width
AXIS_DEST_ENABLE		0	Propagate AXI stream tdest signal
AXIS_DEST_WIDTH		8	AXI stream tdest signal width
AXIS_USER_ENABLE		1	Propagate AXI stream tuser signal
AXIS_USER_WIDTH		1	AXI stream tuser signal width
LEN_WIDTH		20	Length field width
S_TAG_WIDTH		8	Input tag field width
M_TAG_WIDTH		S_TAG_WIDTH+$clog2(PORTS)	Output tag field width (towards CDMA module) Additional bits required for response routing
ARB_TYPE_ROUND_ROBIN		1	select round robin arbitration
ARB_LSB_HIGH_PRIORITY		1	LSB priority selection
CL_PORTS		$clog2(PORTS)

Ports

Port name	Direction	Type	Description
clk	input	wire
rst	input	wire
m_axis_desc_addr	output	wire [AXI_ADDR_WIDTH-1:0]	* Descriptor output (to AXI DMA core) */
m_axis_desc_len	output	wire [LEN_WIDTH-1:0]
m_axis_desc_tag	output	wire [M_TAG_WIDTH-1:0]
m_axis_desc_id	output	wire [AXIS_ID_WIDTH-1:0]
m_axis_desc_dest	output	wire [AXIS_DEST_WIDTH-1:0]
m_axis_desc_user	output	wire [AXIS_USER_WIDTH-1:0]
m_axis_desc_valid	output	wire
m_axis_desc_ready	input	wire
s_axis_desc_status_len	input	wire [LEN_WIDTH-1:0]	* Descriptor status input (from AXI DMA core) */
s_axis_desc_status_tag	input	wire [M_TAG_WIDTH-1:0]
s_axis_desc_status_id	input	wire [AXIS_ID_WIDTH-1:0]
s_axis_desc_status_dest	input	wire [AXIS_DEST_WIDTH-1:0]
s_axis_desc_status_user	input	wire [AXIS_USER_WIDTH-1:0]
s_axis_desc_status_error	input	wire [3:0]
s_axis_desc_status_valid	input	wire
s_axis_desc_addr	input	wire [PORTS*AXI_ADDR_WIDTH-1:0]	* Descriptor input */
s_axis_desc_len	input	wire [PORTS*LEN_WIDTH-1:0]
s_axis_desc_tag	input	wire [PORTS*S_TAG_WIDTH-1:0]
s_axis_desc_id	input	wire [PORTS*AXIS_ID_WIDTH-1:0]
s_axis_desc_dest	input	wire [PORTS*AXIS_DEST_WIDTH-1:0]
s_axis_desc_user	input	wire [PORTS*AXIS_USER_WIDTH-1:0]
s_axis_desc_valid	input	wire [PORTS-1:0]
s_axis_desc_ready	output	wire [PORTS-1:0]
m_axis_desc_status_len	output	wire [PORTS*LEN_WIDTH-1:0]	* Descriptor status output */
m_axis_desc_status_tag	output	wire [PORTS*S_TAG_WIDTH-1:0]
m_axis_desc_status_id	output	wire [PORTS*AXIS_ID_WIDTH-1:0]
m_axis_desc_status_dest	output	wire [PORTS*AXIS_DEST_WIDTH-1:0]
m_axis_desc_status_user	output	wire [PORTS*AXIS_USER_WIDTH-1:0]
m_axis_desc_status_error	output	wire [PORTS*4-1:0]
m_axis_desc_status_valid	output	wire [PORTS-1:0]

Signals

Name	Type	Description
request	wire [PORTS-1:0]	descriptor mux
acknowledge	wire [PORTS-1:0]
grant	wire [PORTS-1:0]
grant_valid	wire
grant_encoded	wire [CL_PORTS-1:0]
m_axis_desc_addr_int	reg [AXI_ADDR_WIDTH-1:0]	internal datapath
m_axis_desc_len_int	reg [LEN_WIDTH-1:0]
m_axis_desc_tag_int	reg [M_TAG_WIDTH-1:0]
m_axis_desc_id_int	reg [AXIS_ID_WIDTH-1:0]
m_axis_desc_dest_int	reg [AXIS_DEST_WIDTH-1:0]
m_axis_desc_user_int	reg [AXIS_USER_WIDTH-1:0]
m_axis_desc_valid_int	reg
m_axis_desc_ready_int_reg	reg
m_axis_desc_ready_int_early	wire
current_s_desc_addr	wire [AXI_ADDR_WIDTH-1:0]	mux for incoming packet
current_s_desc_len	wire [LEN_WIDTH-1:0]
current_s_desc_tag	wire [S_TAG_WIDTH-1:0]
current_s_desc_id	wire [AXIS_ID_WIDTH-1:0]
current_s_desc_dest	wire [AXIS_DEST_WIDTH-1:0]
current_s_desc_user	wire [AXIS_USER_WIDTH-1:0]
current_s_desc_valid	wire
current_s_desc_ready	wire
m_axis_desc_addr_reg	reg [AXI_ADDR_WIDTH-1:0]	output datapath logic
m_axis_desc_len_reg	reg [LEN_WIDTH-1:0]
m_axis_desc_tag_reg	reg [M_TAG_WIDTH-1:0]
m_axis_desc_id_reg	reg [AXIS_ID_WIDTH-1:0]
m_axis_desc_dest_reg	reg [AXIS_DEST_WIDTH-1:0]
m_axis_desc_user_reg	reg [AXIS_USER_WIDTH-1:0]
m_axis_desc_valid_reg	reg
m_axis_desc_valid_next	reg
temp_m_axis_desc_addr_reg	reg [AXI_ADDR_WIDTH-1:0]
temp_m_axis_desc_len_reg	reg [LEN_WIDTH-1:0]
temp_m_axis_desc_tag_reg	reg [M_TAG_WIDTH-1:0]
temp_m_axis_desc_id_reg	reg [AXIS_ID_WIDTH-1:0]
temp_m_axis_desc_dest_reg	reg [AXIS_DEST_WIDTH-1:0]
temp_m_axis_desc_user_reg	reg [AXIS_USER_WIDTH-1:0]
temp_m_axis_desc_valid_reg	reg
temp_m_axis_desc_valid_next	reg
store_axis_int_to_output	reg	datapath control
store_axis_int_to_temp	reg
store_axis_temp_to_output	reg
m_axis_desc_status_len_reg	reg [LEN_WIDTH-1:0]	descriptor status demux
m_axis_desc_status_tag_reg	reg [S_TAG_WIDTH-1:0]
m_axis_desc_status_id_reg	reg [AXIS_ID_WIDTH-1:0]
m_axis_desc_status_dest_reg	reg [AXIS_DEST_WIDTH-1:0]
m_axis_desc_status_user_reg	reg [AXIS_USER_WIDTH-1:0]
m_axis_desc_status_error_reg	reg [3:0]
m_axis_desc_status_valid_reg	reg [PORTS-1:0]

Processes

• unnamed: ( @* )

• unnamed: ( @* )

• unnamed: ( @(posedge clk) )

• unnamed: ( @(posedge clk) )

Instantiations

• arb_inst: arbiter