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https://github.com/openhwgroup/cva6.git
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2ef1c1b1fc
Add support for Superscalar with ZCMP, ZCMT and CVXIF. ZCMP decoder, ZCMT decoder and CVXIF interface driver are using port 0. Standard RVC and 32 bits instruction can take port 0 or 1.
66 lines
2.5 KiB
Systemverilog
66 lines
2.5 KiB
Systemverilog
// Copyright 2024 Thales DIS France SAS
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//
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// Licensed under the Solderpad Hardware Licence, 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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// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.0
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// You may obtain a copy of the License at https://solderpad.org/licenses/
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//
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// Original Author: Guillaume Chauvon
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module cvxif_compressed_if_driver #(
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parameter config_pkg::cva6_cfg_t CVA6Cfg = config_pkg::cva6_cfg_empty,
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parameter type x_compressed_req_t = logic,
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parameter type x_compressed_resp_t = logic
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) (
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// Subsystem Clock - SUBSYSTEM
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input logic clk_i,
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// Asynchronous reset active low - SUBSYSTEM
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input logic rst_ni,
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input logic flush_i,
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// CVA6 Hart id
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input logic [CVA6Cfg.XLEN-1:0] hart_id_i,
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input logic is_compressed_i,
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input logic is_illegal_i,
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input logic [31:0] instruction_i,
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output logic is_compressed_o,
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output logic is_illegal_o,
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output logic [31:0] instruction_o,
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input logic stall_i,
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output logic stall_o,
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// CVXIF Compressed interface
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input logic compressed_ready_i,
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input x_compressed_resp_t compressed_resp_i,
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output logic compressed_valid_o,
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output x_compressed_req_t compressed_req_o
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);
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always_comb begin
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is_illegal_o = is_illegal_i;
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instruction_o = instruction_i;
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is_compressed_o = is_compressed_i;
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compressed_valid_o = 1'b0;
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compressed_req_o.instr = '0;
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compressed_req_o.hartid = hart_id_i;
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stall_o = stall_i;
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if (is_illegal_i) begin
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compressed_valid_o = is_illegal_i;
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compressed_req_o.instr = instruction_i[15:0];
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is_illegal_o = ~compressed_resp_i.accept;
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instruction_o = compressed_resp_i.accept ? compressed_resp_i.instr : instruction_i;
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is_compressed_o = compressed_resp_i.accept ? 1'b0 : is_compressed_i;
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if (~stall_i) begin
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// Propagate stall from macro decoder or wait for compressed ready if compressed transaction is happening.
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stall_o = (compressed_valid_o && ~compressed_ready_i);
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end
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end
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if (flush_i) begin
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compressed_valid_o = 1'b0;
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compressed_req_o.instr = '0;
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compressed_req_o.hartid = hart_id_i;
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end
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end
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endmodule
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