| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| module VTASimDPI |
| ( |
| input clock, |
| input reset, |
| output logic dpi_wait |
| ); |
| |
| import "DPI-C" function void VTASimDPI |
| ( |
| output byte unsigned sim_wait, |
| output byte unsigned sim_exit |
| ); |
| |
| typedef logic dpi1_t; |
| typedef logic [7:0] dpi8_t; |
| |
| dpi1_t __reset; |
| dpi8_t __wait; |
| dpi8_t __exit; |
| |
| // reset |
| always_ff @(posedge clock) begin |
| __reset <= reset; |
| end |
| |
| // evaluate DPI function |
| always_ff @(posedge clock) begin |
| if (reset | __reset) begin |
| __wait = 0; |
| __exit = 0; |
| end |
| else begin |
| VTASimDPI( |
| __wait, |
| __exit); |
| end |
| end |
| |
| logic wait_reg; |
| |
| always_ff @(posedge clock) begin |
| if (reset | __reset) begin |
| wait_reg <= 1'b0; |
| end else if (__wait == 1) begin |
| wait_reg <= 1'b1; |
| end else begin |
| wait_reg <= 1'b0; |
| end |
| end |
| |
| assign dpi_wait = wait_reg; |
| |
| always_ff @(posedge clock) begin |
| if (__exit == 1) begin |
| $finish; |
| end |
| end |
| |
| endmodule |