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Removed floprc with synchronous reset and synchornous clear

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This commit is contained in:
David Harris 2024-02-19 22:28:55 -08:00
parent 6f3a0575ab
commit c77afcb7e6
2 changed files with 2 additions and 40 deletions
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38
src/generic/flop/floprc.sv
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@ -1,38 +0,0 @@
///////////////////////////////////////////
// floprc.sv
//
// Written: David_Harris@hmc.edu 9 January 2021
// Modified:
//
// Purpose: D flip-flop with synchronous reset and clear
//
// A component of the CORE-V-WALLY configurable RISC-V project.
// https://github.com/openhwgroup/cvw
//
// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
//
// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
//
// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file
// except in compliance with the License, or, at your option, the Apache License version 2.0. You
// may obtain a copy of the License at
//
// https://solderpad.org/licenses/SHL-2.1/
//
// Unless required by applicable law or agreed to in writing, any work 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.
////////////////////////////////////////////////////////////////////////////////////////////////
module floprc #(parameter WIDTH = 8) (
input logic clk,
input logic reset,
input logic clear,
input logic [WIDTH-1:0] d,
output logic [WIDTH-1:0] q);
always_ff @(posedge clk)
if (reset | clear ) q <= #1 0;
else q <= #1 d;
endmodule

4
src/privileged/privdec.sv
View file

@ -80,8 +80,8 @@ module privdec import cvw::*; #(parameter cvw_t P) (
if (P.U_SUPPORTED) begin:wfi
logic [P.WFI_TIMEOUT_BIT:0] WFICount, WFICountPlus1;
assign WFICountPlus1 = WFICount + 1;
floprc #(P.WFI_TIMEOUT_BIT+1) wficountreg(clk, reset, ~wfiM, WFICountPlus1, WFICount); // count while in WFI
assign WFICountPlus1 = wfiM ? '0 : WFICount + 1; // restart counting on WFI
flopr #(P.WFI_TIMEOUT_BIT+1) wficountreg(clk, reset, WFICountPlus1, WFICount); // count while in WFI
// coverage off -item e 1 -fecexprrow 1
// 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.
assign WFITimeoutM = ((STATUS_TW & PrivilegeModeW != P.M_MODE) | (P.S_SUPPORTED & PrivilegeModeW == P.U_MODE)) & WFICount[P.WFI_TIMEOUT_BIT];