// SPDX-License-Identifier: Apache-2.0
// Copyright 2020 Western Digital Corporation or its affiliates.
//
// Licensed 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.

//********************************************************************************
// $Id$
//
//
// Owner:
// Function: LSU Trigger logic
// Comments:
//
//********************************************************************************
module el2_lsu_trigger
  import el2_pkg::*;
#(
    `include "el2_param.vh"
) (
    input el2_trigger_pkt_t [ 3:0] trigger_pkt_any,  // trigger packet from dec
    input el2_lsu_pkt_t            lsu_pkt_m,        // lsu packet
    input logic             [31:0] lsu_addr_m,       // address
    input logic             [31:0] store_data_m,     // store data

    output logic [3:0] lsu_trigger_match_m  // match result
);

  logic              trigger_enable;
  logic [ 3:0][31:0] lsu_match_data;
  logic [ 3:0]       lsu_trigger_data_match;
  logic [31:0]       store_data_trigger_m;
  logic [31:0]       ldst_addr_trigger_m;

  // Generate the trigger enable (This is for power)
  always_comb begin
    trigger_enable = 1'b0;
    for (int i = 0; i < 4; i++) begin
      trigger_enable |= trigger_pkt_any[i].m;
    end
  end

  assign store_data_trigger_m[31:0] = {({16{lsu_pkt_m.word}} & store_data_m[31:16]),({8{(lsu_pkt_m.half | lsu_pkt_m.word)}} & store_data_m[15:8]), store_data_m[7:0]} & {32{trigger_enable}};
  assign ldst_addr_trigger_m[31:0] = lsu_addr_m[31:0] & {32{trigger_enable}};


  for (genvar i = 0; i < 4; i++) begin
    assign lsu_match_data[i][31:0] = ({32{~trigger_pkt_any[i].select}} & ldst_addr_trigger_m[31:0]) |
                                       ({32{trigger_pkt_any[i].select & trigger_pkt_any[i].store}} & store_data_trigger_m[31:0]);

    rvmaskandmatch trigger_match (
        .mask  (trigger_pkt_any[i].tdata2[31:0]),
        .data  (lsu_match_data[i][31:0]),
        .masken(trigger_pkt_any[i].match),
        .match (lsu_trigger_data_match[i])
    );

    assign lsu_trigger_match_m[i] = lsu_pkt_m.valid & ~lsu_pkt_m.dma & trigger_enable &
                                        ((trigger_pkt_any[i].store & lsu_pkt_m.store) | (trigger_pkt_any[i].load & lsu_pkt_m.load & ~trigger_pkt_any[i].select)) &
                                        lsu_trigger_data_match[i];
  end


endmodule  // el2_lsu_trigger