Subversion Repositories openhmc

/*
 *                              .--------------. .----------------. .------------.
 *                             | .------------. | .--------------. | .----------. |
 *                             | | ____  ____ | | | ____    ____ | | |   ______ | |
 *                             | ||_   ||   _|| | ||_   \  /   _|| | | .' ___  || |
 *       ___  _ __   ___ _ __  | |  | |__| |  | | |  |   \/   |  | | |/ .'   \_|| |
 *      / _ \| '_ \ / _ \ '_ \ | |  |  __  |  | | |  | |\  /| |  | | || |       | |
 *       (_) | |_) |  __/ | | || | _| |  | |_ | | | _| |_\/_| |_ | | |\ `.___.'\| |
 *      \___/| .__/ \___|_| |_|| ||____||____|| | ||_____||_____|| | | `._____.'| |
 *           | |               | |            | | |              | | |          | |
 *           |_|               | '------------' | '--------------' | '----------' |
 *                              '--------------' '----------------' '------------'
 *
 *  openHMC - An Open Source Hybrid Memory Cube Controller
 *  (C) Copyright 2014 Computer Architecture Group - University of Heidelberg
 *  www.ziti.uni-heidelberg.de
 *  B6, 26
 *  68159 Mannheim
 *  Germany
 *
 *  Contact: openhmc@ziti.uni-heidelberg.de
 *  http://ra.ziti.uni-heidelberg.de/openhmc
 *
 *   This source file is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This source file is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this source file.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 */
//
//
// hmc link tag checker
//
//

`ifndef hmc_tag_mon_SV
`define hmc_tag_mon_SV

class hmc_tag_mon  extends uvm_component;


        int tags_in_use[int];
        int current_tag;
        int transaction_count;
        int max_tags_in_use;
        
        int max_tags_available = 512;
        
        
        covergroup tags_cg;
                option.per_instance = 1;
                TAGS_IN_USE : coverpoint tags_in_use.size(){
                        bins low_usage[]        = {[1:20]};
                        bins medium_usage[]     = {[21:250]};
                        bins high_usage[]       = {[251:511]};
                        bins no_tags_available = {512};
                }
                
                USED_TAGS       : coverpoint current_tag{
                        bins TAGS[] = {[1:511]};
                }
        endgroup
        
        `uvm_component_utils_begin(hmc_tag_mon)
                `uvm_field_int(max_tags_available, UVM_DEFAULT)
        `uvm_component_utils_end


        function new ( string name="hmc_tag_mon", uvm_component parent );
                super.new(name, parent);
                tags_in_use.delete();
                max_tags_in_use = 0;
                transaction_count = 0;
                tags_cg = new();
        endfunction : new

        function void reset();
                tags_in_use.delete();
        endfunction : reset

        function void use_tag(input bit [8:0] tag);
                int tmp[];
                
                if (tag > max_tags_available-1)
                        `uvm_fatal(get_type_name(), $psprintf("use_tag: tag (%0d) out of range!", tag))
                
                 if(!tags_in_use.exists(tag) ) begin
                        tags_in_use[tag] = tag;
                        current_tag = tag;
                        tags_cg.sample();
                end
        
        endfunction : use_tag

        function void release_tag(input bit [8:0] tag);
                if (tags_in_use.exists(tag))
                        tags_in_use.delete(tag);
                else
                        `uvm_fatal(get_type_name(), $psprintf("release_tag: tag (%0d) not in use!", tag))

                transaction_count++;
        endfunction : release_tag

        function bit idle_check();
                idle_check = 1;
                if (tags_in_use.size() > 0) begin
                        foreach (tags_in_use[i])
                                `uvm_info(get_type_name(), $psprintf("%0d tags still in use, Tag %0d is in use!", tags_in_use.size(), i),UVM_LOW)
                        idle_check = 0;
                end
        endfunction : idle_check

        function void check_phase(uvm_phase phase);
                if (!idle_check())
                        `uvm_fatal(get_type_name(),$psprintf("Tags are still in use"))
        endfunction : check_phase

        function void report_phase(uvm_phase phase);
                `uvm_info(get_type_name(),$psprintf("max_tags_in_use %0d, transaction_count %0d", max_tags_in_use, transaction_count), UVM_LOW)
        endfunction : report_phase

endclass : hmc_tag_mon

`endif // hmc_tag_mon_SV