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https://github.com/openhwgroup/cvw
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Removed floprc with synchronous reset and synchornous clear
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///////////////////////////////////////////
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// floprc.sv
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//
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// Written: David_Harris@hmc.edu 9 January 2021
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// Modified:
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//
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// Purpose: D flip-flop with synchronous reset and clear
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//
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// A component of the CORE-V-WALLY configurable RISC-V project.
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// https://github.com/openhwgroup/cvw
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//
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// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
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//
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// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
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//
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// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file
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// except in compliance with the License, or, at your option, the Apache License version 2.0. You
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// may obtain a copy of the License at
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//
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// https://solderpad.org/licenses/SHL-2.1/
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//
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// Unless required by applicable law or agreed to in writing, any work distributed under the
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// License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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////////////////////////////////////////////////////////////////////////////////////////////////
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module floprc #(parameter WIDTH = 8) (
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input logic clk,
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input logic reset,
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input logic clear,
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input logic [WIDTH-1:0] d,
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output logic [WIDTH-1:0] q);
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always_ff @(posedge clk)
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if (reset | clear ) q <= #1 0;
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else q <= #1 d;
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endmodule
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@ -80,8 +80,8 @@ module privdec import cvw::*; #(parameter cvw_t P) (
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if (P.U_SUPPORTED) begin:wfi
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if (P.U_SUPPORTED) begin:wfi
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logic [P.WFI_TIMEOUT_BIT:0] WFICount, WFICountPlus1;
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logic [P.WFI_TIMEOUT_BIT:0] WFICount, WFICountPlus1;
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assign WFICountPlus1 = WFICount + 1;
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assign WFICountPlus1 = wfiM ? '0 : WFICount + 1; // restart counting on WFI
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floprc #(P.WFI_TIMEOUT_BIT+1) wficountreg(clk, reset, ~wfiM, WFICountPlus1, WFICount); // count while in WFI
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flopr #(P.WFI_TIMEOUT_BIT+1) wficountreg(clk, reset, WFICountPlus1, WFICount); // count while in WFI
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// coverage off -item e 1 -fecexprrow 1
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// coverage off -item e 1 -fecexprrow 1
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// WFI Timout trap will not occur when STATUS_TW is low while in supervisor mode, so the system gets stuck waiting for an interrupt and triggers a watchdog timeout.
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// WFI Timout trap will not occur when STATUS_TW is low while in supervisor mode, so the system gets stuck waiting for an interrupt and triggers a watchdog timeout.
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assign WFITimeoutM = ((STATUS_TW & PrivilegeModeW != P.M_MODE) | (P.S_SUPPORTED & PrivilegeModeW == P.U_MODE)) & WFICount[P.WFI_TIMEOUT_BIT];
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assign WFITimeoutM = ((STATUS_TW & PrivilegeModeW != P.M_MODE) | (P.S_SUPPORTED & PrivilegeModeW == P.U_MODE)) & WFICount[P.WFI_TIMEOUT_BIT];
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