verilog/rtl/user_id_programming.v

// SPDX-FileCopyrightText: 2020 Efabless Corporation
//
// 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.
// SPDX-License-Identifier: Apache-2.0

`default_nettype none
// This module represents an unprogrammed mask revision
// block that is configured with via programming on the
// chip top level.  This value is passed to the block as
// a parameter

module user_id_programming #(
    parameter [ 0:0] USER_PROJECT_ID = 32'h0
) (
`ifdef USE_POWER_PINS
    inout VPWR,
    inout VGND,
`endif
    output [31:0] mask_rev
);
    wire [31:0] mask_rev;
    wire [31:0] user_proj_id_high;
    wire [31:0] user_proj_id_low;

    // For the mask revision input, use an array of digital constant logic cells

    sky130_fd_sc_hd__conb_1 mask_rev_value [31:0] (
`ifdef USE_POWER_PINS
            .VPWR(VPWR),
            .VPB(VPWR),
            .VNB(VGND),
            .VGND(VGND),
`endif
            .HI(user_proj_id_high),
            .LO(user_proj_id_low)
    );

    genvar i;
    generate
	for (i = 0; i < 32; i = i+1) begin
	    assign mask_rev[i] = (USER_PROJECT_ID & (32'h01 << i)) ?
			user_proj_id_high[i] : user_proj_id_low[i];
	end
    endgenerate

endmodule
`default_nettype wire