quasar/soc/vsrc/dmi_wrapper.sv

91 lines
3.9 KiB
Systemverilog
Raw Normal View History

2022-03-10 11:56:21 +08:00
// SPDX-License-Identifier: Apache-2.0
// Copyright 2018 Western Digital Corporation or it's affiliates.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the 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.
//------------------------------------------------------------------------------------
//
// Copyright Western Digital, 2018
// Owner : Anusha Narayanamoorthy
// Description:
// Wrapper module for JTAG_TAP and DMI synchronizer
//
//-------------------------------------------------------------------------------------
module dmi_wrapper(
// JTAG signals
input trst_n, // JTAG reset
input tck, // JTAG clock
input tms, // Test mode select
input tdi, // Test Data Input
output tdo, // Test Data Output
output tdoEnable, // Test Data Output enable
// Processor Signals
input core_rst_n, // Core reset
input core_clk, // Core clock
input [31:1] jtag_id, // JTAG ID
input [31:0] rd_data, // 32 bit Read data from Processor
output [31:0] reg_wr_data, // 32 bit Write data to Processor
output [6:0] reg_wr_addr, // 7 bit reg address to Processor
output reg_en, // 1 bit Read enable to Processor
output reg_wr_en, // 1 bit Write enable to Processor
output dmi_hard_reset
);
//Wire Declaration
wire rd_en;
wire wr_en;
wire dmireset;
//jtag_tap instantiation
rvjtag_tap i_jtag_tap(
.trst(trst_n), // dedicated JTAG TRST (active low) pad signal or asynchronous active low power on reset
.tck(tck), // dedicated JTAG TCK pad signal
.tms(tms), // dedicated JTAG TMS pad signal
.tdi(tdi), // dedicated JTAG TDI pad signal
.tdo(tdo), // dedicated JTAG TDO pad signal
.tdoEnable(tdoEnable), // enable for TDO pad
.wr_data(reg_wr_data), // 32 bit Write data
.wr_addr(reg_wr_addr), // 7 bit Write address
.rd_en(rd_en), // 1 bit read enable
.wr_en(wr_en), // 1 bit Write enable
.rd_data(rd_data), // 32 bit Read data
.rd_status(2'b0),
.idle(3'h0), // no need to wait to sample data
.dmi_stat(2'b0), // no need to wait or error possible
.version(4'h1), // debug spec 0.13 compliant
.jtag_id(jtag_id),
.dmi_hard_reset(dmi_hard_reset),
.dmi_reset(dmireset)
);
// dmi_jtag_to_core_sync instantiation
dmi_jtag_to_core_sync i_dmi_jtag_to_core_sync(
.wr_en(wr_en), // 1 bit Write enable
.rd_en(rd_en), // 1 bit Read enable
.rst_n(core_rst_n),
.clk(core_clk),
.reg_en(reg_en), // 1 bit Write interface bit
.reg_wr_en(reg_wr_en) // 1 bit Write enable
);
endmodule