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axi_dw_converter.sv
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axi_dw_converter.sv
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// Copyright 2020 ETH Zurich and University of Bologna.
// Copyright and related rights are licensed under the Solderpad Hardware
// License, Version 0.51 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://solderpad.org/licenses/SHL-0.51. Unless required by applicable law
// or agreed to in writing, software, hardware and materials distributed under
// this License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
//
// Authors:
// - Matheus Cavalcante <[email protected]>
// NOTE: The upsizer does not support WRAP bursts, and will answer with SLVERR
// upon receiving a burst of such type. In addition to that, the downsizer also
// does not support FIXED bursts with incoming axlen != 0.
module axi_dw_converter #(
parameter int unsigned AxiMaxReads = 1 , // Number of outstanding reads
parameter int unsigned AxiSlvPortDataWidth = 8 , // Data width of the slv port
parameter int unsigned AxiMstPortDataWidth = 8 , // Data width of the mst port
parameter int unsigned AxiAddrWidth = 1 , // Address width
parameter int unsigned AxiIdWidth = 1 , // ID width
parameter type aw_chan_t = logic, // AW Channel Type
parameter type mst_w_chan_t = logic, // W Channel Type for the mst port
parameter type slv_w_chan_t = logic, // W Channel Type for the slv port
parameter type b_chan_t = logic, // B Channel Type
parameter type ar_chan_t = logic, // AR Channel Type
parameter type mst_r_chan_t = logic, // R Channel Type for the mst port
parameter type slv_r_chan_t = logic, // R Channel Type for the slv port
parameter type axi_mst_req_t = logic, // AXI Request Type for mst ports
parameter type axi_mst_resp_t = logic, // AXI Response Type for mst ports
parameter type axi_slv_req_t = logic, // AXI Request Type for slv ports
parameter type axi_slv_resp_t = logic // AXI Response Type for slv ports
) (
input logic clk_i,
input logic rst_ni,
// Slave interface
input axi_slv_req_t slv_req_i,
output axi_slv_resp_t slv_resp_o,
// Master interface
output axi_mst_req_t mst_req_o,
input axi_mst_resp_t mst_resp_i
);
if (AxiMstPortDataWidth == AxiSlvPortDataWidth) begin: gen_no_dw_conversion
assign mst_req_o = slv_req_i ;
assign slv_resp_o = mst_resp_i;
end : gen_no_dw_conversion
if (AxiMstPortDataWidth > AxiSlvPortDataWidth) begin: gen_dw_upsize
axi_dw_upsizer #(
.AxiMaxReads (AxiMaxReads ),
.AxiSlvPortDataWidth(AxiSlvPortDataWidth),
.AxiMstPortDataWidth(AxiMstPortDataWidth),
.AxiAddrWidth (AxiAddrWidth ),
.AxiIdWidth (AxiIdWidth ),
.aw_chan_t (aw_chan_t ),
.mst_w_chan_t (mst_w_chan_t ),
.slv_w_chan_t (slv_w_chan_t ),
.b_chan_t (b_chan_t ),
.ar_chan_t (ar_chan_t ),
.mst_r_chan_t (mst_r_chan_t ),
.slv_r_chan_t (slv_r_chan_t ),
.axi_mst_req_t (axi_mst_req_t ),
.axi_mst_resp_t (axi_mst_resp_t ),
.axi_slv_req_t (axi_slv_req_t ),
.axi_slv_resp_t (axi_slv_resp_t )
) i_axi_dw_upsizer (
.clk_i (clk_i ),
.rst_ni (rst_ni ),
// Slave interface
.slv_req_i (slv_req_i ),
.slv_resp_o(slv_resp_o),
// Master interface
.mst_req_o (mst_req_o ),
.mst_resp_i(mst_resp_i)
);
end : gen_dw_upsize
if (AxiMstPortDataWidth < AxiSlvPortDataWidth) begin: gen_dw_downsize
axi_dw_downsizer #(
.AxiMaxReads (AxiMaxReads ),
.AxiSlvPortDataWidth(AxiSlvPortDataWidth),
.AxiMstPortDataWidth(AxiMstPortDataWidth),
.AxiAddrWidth (AxiAddrWidth ),
.AxiIdWidth (AxiIdWidth ),
.aw_chan_t (aw_chan_t ),
.mst_w_chan_t (mst_w_chan_t ),
.slv_w_chan_t (slv_w_chan_t ),
.b_chan_t (b_chan_t ),
.ar_chan_t (ar_chan_t ),
.mst_r_chan_t (mst_r_chan_t ),
.slv_r_chan_t (slv_r_chan_t ),
.axi_mst_req_t (axi_mst_req_t ),
.axi_mst_resp_t (axi_mst_resp_t ),
.axi_slv_req_t (axi_slv_req_t ),
.axi_slv_resp_t (axi_slv_resp_t )
) i_axi_dw_downsizer (
.clk_i (clk_i ),
.rst_ni (rst_ni ),
// Slave interface
.slv_req_i (slv_req_i ),
.slv_resp_o(slv_resp_o),
// Master interface
.mst_req_o (mst_req_o ),
.mst_resp_i(mst_resp_i)
);
end : gen_dw_downsize
endmodule : axi_dw_converter
// Interface wrapper
`include "axi/assign.svh"
`include "axi/typedef.svh"
module axi_dw_converter_intf #(
parameter int unsigned AXI_ID_WIDTH = 1,
parameter int unsigned AXI_ADDR_WIDTH = 1,
parameter int unsigned AXI_SLV_PORT_DATA_WIDTH = 8,
parameter int unsigned AXI_MST_PORT_DATA_WIDTH = 8,
parameter int unsigned AXI_USER_WIDTH = 0,
parameter int unsigned AXI_MAX_READS = 8
) (
input logic clk_i,
input logic rst_ni,
AXI_BUS.Slave slv,
AXI_BUS.Master mst
);
typedef logic [AXI_ID_WIDTH-1:0] id_t ;
typedef logic [AXI_ADDR_WIDTH-1:0] addr_t ;
typedef logic [AXI_MST_PORT_DATA_WIDTH-1:0] mst_data_t ;
typedef logic [AXI_MST_PORT_DATA_WIDTH/8-1:0] mst_strb_t;
typedef logic [AXI_SLV_PORT_DATA_WIDTH-1:0] slv_data_t ;
typedef logic [AXI_SLV_PORT_DATA_WIDTH/8-1:0] slv_strb_t;
typedef logic [AXI_USER_WIDTH-1:0] user_t ;
`AXI_TYPEDEF_AW_CHAN_T(aw_chan_t, addr_t, id_t, user_t)
`AXI_TYPEDEF_W_CHAN_T(mst_w_chan_t, mst_data_t, mst_strb_t, user_t)
`AXI_TYPEDEF_W_CHAN_T(slv_w_chan_t, slv_data_t, slv_strb_t, user_t)
`AXI_TYPEDEF_B_CHAN_T(b_chan_t, id_t, user_t)
`AXI_TYPEDEF_AR_CHAN_T(ar_chan_t, addr_t, id_t, user_t)
`AXI_TYPEDEF_R_CHAN_T(mst_r_chan_t, mst_data_t, id_t, user_t)
`AXI_TYPEDEF_R_CHAN_T(slv_r_chan_t, slv_data_t, id_t, user_t)
`AXI_TYPEDEF_REQ_T(mst_req_t, aw_chan_t, mst_w_chan_t, ar_chan_t)
`AXI_TYPEDEF_RESP_T(mst_resp_t, b_chan_t, mst_r_chan_t)
`AXI_TYPEDEF_REQ_T(slv_req_t, aw_chan_t, slv_w_chan_t, ar_chan_t)
`AXI_TYPEDEF_RESP_T(slv_resp_t, b_chan_t, slv_r_chan_t)
slv_req_t slv_req;
slv_resp_t slv_resp;
mst_req_t mst_req;
mst_resp_t mst_resp;
`AXI_ASSIGN_TO_REQ(slv_req, slv)
`AXI_ASSIGN_FROM_RESP(slv, slv_resp)
`AXI_ASSIGN_FROM_REQ(mst, mst_req)
`AXI_ASSIGN_TO_RESP(mst_resp, mst)
axi_dw_converter #(
.AxiMaxReads ( AXI_MAX_READS ),
.AxiSlvPortDataWidth( AXI_SLV_PORT_DATA_WIDTH ),
.AxiMstPortDataWidth( AXI_MST_PORT_DATA_WIDTH ),
.AxiAddrWidth ( AXI_ADDR_WIDTH ),
.AxiIdWidth ( AXI_ID_WIDTH ),
.aw_chan_t ( aw_chan_t ),
.mst_w_chan_t ( mst_w_chan_t ),
.slv_w_chan_t ( slv_w_chan_t ),
.b_chan_t ( b_chan_t ),
.ar_chan_t ( ar_chan_t ),
.mst_r_chan_t ( mst_r_chan_t ),
.slv_r_chan_t ( slv_r_chan_t ),
.axi_mst_req_t ( mst_req_t ),
.axi_mst_resp_t ( mst_resp_t ),
.axi_slv_req_t ( slv_req_t ),
.axi_slv_resp_t ( slv_resp_t )
) i_axi_dw_converter (
.clk_i ( clk_i ),
.rst_ni ( rst_ni ),
// slave port
.slv_req_i ( slv_req ),
.slv_resp_o ( slv_resp ),
// master port
.mst_req_o ( mst_req ),
.mst_resp_i ( mst_resp )
);
endmodule : axi_dw_converter_intf