mirror of https://github.com/efabless/caravel.git
166 lines
4.9 KiB
Verilog
166 lines
4.9 KiB
Verilog
// SPDX-FileCopyrightText: 2020 Efabless Corporation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// SPDX-License-Identifier: Apache-2.0
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`default_nettype none
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/*
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*-------------------------------------------------------------
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*
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* user_project_wrapper
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*
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* This wrapper enumerates all of the pins available to the
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* user for the user project.
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*
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* An example user project is provided in this wrapper. The
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* example should be removed and replaced with the actual
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* user project.
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*
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*-------------------------------------------------------------
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*/
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module user_project_wrapper #(
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parameter BITS = 32
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)(
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`ifdef USE_POWER_PINS
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inout vdda1, // User area 1 3.3V supply
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inout vdda2, // User area 2 3.3V supply
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inout vssa1, // User area 1 analog ground
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inout vssa2, // User area 2 analog ground
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inout vccd1, // User area 1 1.8V supply
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inout vccd2, // User area 2 1.8v supply
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inout vssd1, // User area 1 digital ground
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inout vssd2, // User area 2 digital ground
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`endif
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// Wishbone Slave ports (WB MI A)
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input wb_clk_i,
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input wb_rst_i,
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input wbs_stb_i,
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input wbs_cyc_i,
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input wbs_we_i,
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input [3:0] wbs_sel_i,
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input [31:0] wbs_dat_i,
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input [31:0] wbs_adr_i,
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output wbs_ack_o,
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output [31:0] wbs_dat_o,
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// Logic Analyzer Signals
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input [127:0] la_data_in,
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output [127:0] la_data_out,
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input [127:0] la_oenb,
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// IOs
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input [`MPRJ_IO_PADS-1:0] io_in,
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output [`MPRJ_IO_PADS-1:0] io_out,
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output [`MPRJ_IO_PADS-1:0] io_oeb,
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// Analog (direct connection to GPIO pad---use with caution)
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// Note that analog I/O is not available on the 7 lowest-numbered
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// GPIO pads, and so the analog_io indexing is offset from the
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// GPIO indexing by 7 (also upper 2 GPIOs do not have analog_io).
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inout [`MPRJ_IO_PADS-10:0] analog_io,
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// Independent clock (on independent integer divider)
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input user_clock2,
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// User maskable interrupt signals
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output [2:0] user_irq
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);
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// Dummy assignments so that we can take it through the openlane flow
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`ifndef GPIO_TESTING
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`ifdef SIM
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// Needed for running GL simulation
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assign io_out = 0;
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assign io_oeb = 0;
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`else
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assign io_out = io_in;
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`endif
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`endif // GPIO_TESTING
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`ifdef LA_TESTING
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user_project_la_example la_testing(la_data_in,la_data_out,la_oenb);
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`endif
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// splitting the address space to user address space and debug address space
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// debug address space are the last 2 registers of user_project_wrapper address space
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wire wbs_cyc_i_user;
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wire wbs_ack_o_user;
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wire [31:0] wbs_dat_o_user;
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wire wbs_cyc_i_debug;
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wire wbs_ack_o_debug;
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`ifdef GPIO_TESTING
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wire wbs_ack_o_gpio;
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wire [31:0] wbs_dat_o_gpio;
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`endif
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wire [31:0] wbs_dat_o_debug;
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// reserve the last 2 regs for debugging registers
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`ifndef GPIO_TESTING
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assign wbs_cyc_i_user = (wbs_adr_i[31:3] != 29'h601FFFF) ? wbs_cyc_i : 0;
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assign wbs_cyc_i_debug = (wbs_adr_i[31:3] == 29'h601FFFF) ? wbs_cyc_i : 0;
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`endif
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`ifndef GPIO_TESTING
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assign wbs_ack_o = (wbs_adr_i[31:3] == 28'h601FFFF) ? wbs_ack_o_debug : wbs_ack_o_debug;
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assign wbs_dat_o = (wbs_adr_i[31:3] == 28'h601FFFF) ? wbs_dat_o_debug : wbs_dat_o_user;
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`endif
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// reserve the last 4 regs for debugging registers in case of user gpio testing
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`ifdef GPIO_TESTING
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assign wbs_cyc_i_user = (wbs_adr_i[31:4] != 28'h300FFFF) ? wbs_cyc_i : 0;
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assign wbs_cyc_i_debug = (wbs_adr_i[31:4] == 28'h300FFFF) ? wbs_cyc_i : 0;
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`endif
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`ifdef GPIO_TESTING
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assign wbs_ack_o = (wbs_adr_i[31:4] == 28'h300FFFF) ? (wbs_adr_i[3:0]>=4'h8) ? wbs_ack_o_debug : wbs_ack_o_gpio : wbs_ack_o_debug;
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assign wbs_dat_o = (wbs_adr_i[31:4] == 28'h300FFFF) ? (wbs_adr_i[3:0]>=4'h8) ? wbs_dat_o_debug : wbs_dat_o_gpio : wbs_dat_o_user;
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`endif
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`ifdef GPIO_TESTING
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user_project_gpio_example gpio_testing(
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.wb_clk_i(wb_clk_i),
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.wb_rst_i(wb_rst_i),
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.wbs_cyc_i(wbs_cyc_i_debug),
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.wbs_stb_i(wbs_stb_i),
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.wbs_we_i(wbs_we_i),
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.wbs_sel_i(wbs_sel_i),
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.wbs_adr_i(wbs_adr_i),
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.wbs_dat_i(wbs_dat_i),
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.wbs_ack_o(wbs_ack_o_gpio),
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.wbs_dat_o(wbs_dat_o_gpio),
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.io_in(io_in),
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.io_out(io_out),
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.io_oeb(io_oeb));
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`endif
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debug_regs debug(
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.wb_clk_i(wb_clk_i),
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.wb_rst_i(wb_rst_i),
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.wbs_cyc_i(wbs_cyc_i_debug),
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.wbs_stb_i(wbs_stb_i),
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.wbs_we_i(wbs_we_i),
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.wbs_sel_i(wbs_sel_i),
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.wbs_adr_i(wbs_adr_i),
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.wbs_dat_i(wbs_dat_i),
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.wbs_ack_o(wbs_ack_o_debug),
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.wbs_dat_o(wbs_dat_o_debug)
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);
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endmodule // user_project_wrapper
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