design/sys/iop/dmu/rtl/dmu_imu_rds_mess_addr_decode.v

// ========== Copyright Header Begin ==========================================
//
// OpenSPARC T2 Processor File: dmu_imu_rds_mess_addr_decode.v
// Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved
// 4150 Network Circle, Santa Clara, California 95054, U.S.A.
//
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//
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// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
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// along with this program; if not, write to the Free Software
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//
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// choice is available it will apply instead, Sun elects to use only
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// ========== Copyright Header End ============================================
module dmu_imu_rds_mess_addr_decode
        (
        clk,
        rst_l,
        daemon_csrbus_valid,
        daemon_csrbus_addr,
        csrbus_src_bus,
        daemon_csrbus_wr,
        daemon_csrbus_wr_out,
        daemon_csrbus_wr_data,
        daemon_csrbus_wr_data_out,
        daemon_csrbus_mapped,
        csrbus_acc_vio,
        daemon_transaction_in_progress,
        instance_id,
        daemon_csrbus_done,
        err_cor_mapping_select_pulse,
        err_nonfatal_mapping_select_pulse,
        err_fatal_mapping_select_pulse,
        pm_pme_mapping_select_pulse,
        pme_to_ack_mapping_select_pulse
        );

//====================================================================
//     Polarity declarations
//====================================================================
input  clk;  // Clock signal
input  rst_l;  // Reset
input  daemon_csrbus_valid;  // Daemon_Valid
input  [`FIRE_CSRBUS_ADDR_WIDTH - 1:0] daemon_csrbus_addr;  // Daemon_Addr
input  [1:0] csrbus_src_bus;  // Source bus
input  daemon_csrbus_wr;  // Read/Write signal
output daemon_csrbus_wr_out;  // Read/Write signal
input  [`FIRE_CSRBUS_DATA_WIDTH-1:0] daemon_csrbus_wr_data;  // Write data
output [`FIRE_CSRBUS_DATA_WIDTH-1:0] daemon_csrbus_wr_data_out;  // Write data
output daemon_csrbus_mapped;  // mapped
output csrbus_acc_vio;  // acc_vio
input  daemon_transaction_in_progress;  // daemon_transaction_in_progress
input  instance_id;  // Instance ID
output daemon_csrbus_done;  // Operation is done
output err_cor_mapping_select_pulse;  // select signal
output err_nonfatal_mapping_select_pulse;  // select signal
output err_fatal_mapping_select_pulse;  // select signal
output pm_pme_mapping_select_pulse;  // select signal
output pme_to_ack_mapping_select_pulse;  // select signal

//====================================================================
//     Type declarations
//====================================================================
wire clk;  // Clock signal
wire rst_l;  // Reset
wire daemon_csrbus_valid;  // Daemon_Valid
wire [`FIRE_CSRBUS_ADDR_WIDTH - 1:0] daemon_csrbus_addr;  // Daemon_Addr
wire [1:0] csrbus_src_bus;  // Source bus
wire daemon_csrbus_wr;  // Read/Write signal
reg daemon_csrbus_wr_out;  // Read/Write signal
wire [`FIRE_CSRBUS_DATA_WIDTH-1:0] daemon_csrbus_wr_data;  // Write data
reg [`FIRE_CSRBUS_DATA_WIDTH-1:0] daemon_csrbus_wr_data_out;  // Write data
wire daemon_csrbus_mapped;  // mapped
wire csrbus_acc_vio;  // acc_vio
wire daemon_transaction_in_progress;  // daemon_transaction_in_progress
wire instance_id;  // Instance ID
wire daemon_csrbus_done;  // Operation is done
reg err_cor_mapping_select_pulse;  // select signal
reg err_nonfatal_mapping_select_pulse;  // select signal
reg err_fatal_mapping_select_pulse;  // select signal
reg pm_pme_mapping_select_pulse;  // select signal
reg pme_to_ack_mapping_select_pulse;  // select signal


//====================================================================
//     Clocked valid
//====================================================================
reg clocked_valid;
reg clocked_valid_pulse;
always @(posedge clk)
  begin
     if(~rst_l)
       begin
          clocked_valid <= 1'b0;
          clocked_valid_pulse <= 1'b0;
       end
     else
       begin
          clocked_valid <= daemon_csrbus_valid;
          clocked_valid_pulse <= daemon_csrbus_valid & ~clocked_valid;
       end
  end

//====================================================================
//    Address Decode
//====================================================================
reg err_cor_mapping_addr_decoded;
reg err_nonfatal_mapping_addr_decoded;
reg err_fatal_mapping_addr_decoded;
reg pm_pme_mapping_addr_decoded;
reg pme_to_ack_mapping_addr_decoded;

always @(daemon_csrbus_addr or daemon_csrbus_valid or instance_id)
  begin
    if (~daemon_csrbus_valid)
      begin
        err_cor_mapping_addr_decoded = 1'b0;
        err_nonfatal_mapping_addr_decoded = 1'b0;
        err_fatal_mapping_addr_decoded = 1'b0;
        pm_pme_mapping_addr_decoded = 1'b0;
        pme_to_ack_mapping_addr_decoded = 1'b0;
      end
    else
      case (instance_id)

        `FIRE_DLC_IMU_RDS_MESS_INSTANCE_ID_VALUE_A:
          begin
        err_cor_mapping_addr_decoded =
                daemon_csrbus_addr[26:0] == `FIRE_DLC_IMU_RDS_MESS_CSR_A_ERR_COR_MAPPING_HW_ADDR;
        err_nonfatal_mapping_addr_decoded =
                daemon_csrbus_addr[26:0] == `FIRE_DLC_IMU_RDS_MESS_CSR_A_ERR_NONFATAL_MAPPING_HW_ADDR;
        err_fatal_mapping_addr_decoded =
                daemon_csrbus_addr[26:0] == `FIRE_DLC_IMU_RDS_MESS_CSR_A_ERR_FATAL_MAPPING_HW_ADDR;
        pm_pme_mapping_addr_decoded =
                daemon_csrbus_addr[26:0] == `FIRE_DLC_IMU_RDS_MESS_CSR_A_PM_PME_MAPPING_HW_ADDR;
        pme_to_ack_mapping_addr_decoded =
                daemon_csrbus_addr[26:0] == `FIRE_DLC_IMU_RDS_MESS_CSR_A_PME_TO_ACK_MAPPING_HW_ADDR;
          end

        `FIRE_DLC_IMU_RDS_MESS_INSTANCE_ID_VALUE_B:
          begin
        err_cor_mapping_addr_decoded =
                daemon_csrbus_addr[26:0] == `FIRE_DLC_IMU_RDS_MESS_CSR_B_ERR_COR_MAPPING_HW_ADDR;
        err_nonfatal_mapping_addr_decoded =
                daemon_csrbus_addr[26:0] == `FIRE_DLC_IMU_RDS_MESS_CSR_B_ERR_NONFATAL_MAPPING_HW_ADDR;
        err_fatal_mapping_addr_decoded =
                daemon_csrbus_addr[26:0] == `FIRE_DLC_IMU_RDS_MESS_CSR_B_ERR_FATAL_MAPPING_HW_ADDR;
        pm_pme_mapping_addr_decoded =
                daemon_csrbus_addr[26:0] == `FIRE_DLC_IMU_RDS_MESS_CSR_B_PM_PME_MAPPING_HW_ADDR;
        pme_to_ack_mapping_addr_decoded =
                daemon_csrbus_addr[26:0] == `FIRE_DLC_IMU_RDS_MESS_CSR_B_PME_TO_ACK_MAPPING_HW_ADDR;
          end

        default:
          begin
            err_cor_mapping_addr_decoded = 1'b0;
            err_nonfatal_mapping_addr_decoded = 1'b0;
            err_fatal_mapping_addr_decoded = 1'b0;
            pm_pme_mapping_addr_decoded = 1'b0;
            pme_to_ack_mapping_addr_decoded = 1'b0;
// vlint flag_system_call off
            // synopsys translate_off
            if(daemon_csrbus_valid)
               begin // axis tbcall_region
`ifdef PR_ERROR if ($time > 1 && rst_l) `PR_ERROR("dmu_imu_rds_mess_addr_decode",`MON_ERROR,"ERROR: Instance ID for module dmu_imu_rds_mess_csr is bad"); `endif
               end // end of tbcall_region
            // synopsys translate_on
// vlint flag_system_call on
          end
      endcase
  end

//====================================================================
//      Register violations
//====================================================================
//----- reg_acc_vio: err_cor_mapping
reg err_cor_mapping_acc_vio;
always @(csrbus_src_bus or daemon_csrbus_wr or
         err_cor_mapping_addr_decoded or
         daemon_transaction_in_progress)
  begin
    if (daemon_transaction_in_progress | ~err_cor_mapping_addr_decoded)
      err_cor_mapping_acc_vio = 1'b0;
    else
      case ({csrbus_src_bus, daemon_csrbus_wr})
        // reads
          {`FIRE_CSRBUS_SRC_BUS_ENC_JTAG, 1'b0}:
              err_cor_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_SLOW, 1'b0}:
              err_cor_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_MED, 1'b0}:
              err_cor_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_FAST, 1'b0}:
              err_cor_mapping_acc_vio = 1'b0;
        // writes
          {`FIRE_CSRBUS_SRC_BUS_ENC_JTAG, 1'b1}:
              err_cor_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_SLOW, 1'b1}:
              err_cor_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_MED, 1'b1}:
              err_cor_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_FAST, 1'b1}:
              err_cor_mapping_acc_vio = 1'b0;

          default:
             begin
                err_cor_mapping_acc_vio = 1'b0;
                begin // axis tbcall_region
                      // vlint flag_system_call off
                      // synopsys translate_off
`ifdef PR_ERROR if ($time > 1 && rst_l) `PR_ERROR("dmu_imu_rds_mess_addr_decode",`MON_ERROR,"acc_vio: default case of dmu_imu_rds_mess_csr_a_err_cor_mapping"); `endif
                    // synopsys translate_on
                    // vlint flag_system_call on
                end // end of tbcall_region
             end
      endcase
  end
//----- reg_acc_vio: err_nonfatal_mapping
reg err_nonfatal_mapping_acc_vio;
always @(csrbus_src_bus or daemon_csrbus_wr or
         err_nonfatal_mapping_addr_decoded or
         daemon_transaction_in_progress)
  begin
    if (daemon_transaction_in_progress | ~err_nonfatal_mapping_addr_decoded)
      err_nonfatal_mapping_acc_vio = 1'b0;
    else
      case ({csrbus_src_bus, daemon_csrbus_wr})
        // reads
          {`FIRE_CSRBUS_SRC_BUS_ENC_JTAG, 1'b0}:
              err_nonfatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_SLOW, 1'b0}:
              err_nonfatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_MED, 1'b0}:
              err_nonfatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_FAST, 1'b0}:
              err_nonfatal_mapping_acc_vio = 1'b0;
        // writes
          {`FIRE_CSRBUS_SRC_BUS_ENC_JTAG, 1'b1}:
              err_nonfatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_SLOW, 1'b1}:
              err_nonfatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_MED, 1'b1}:
              err_nonfatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_FAST, 1'b1}:
              err_nonfatal_mapping_acc_vio = 1'b0;

          default:
             begin
                err_nonfatal_mapping_acc_vio = 1'b0;
                begin // axis tbcall_region
                      // vlint flag_system_call off
                      // synopsys translate_off
`ifdef PR_ERROR if ($time > 1 && rst_l) `PR_ERROR("dmu_imu_rds_mess_addr_decode",`MON_ERROR,"acc_vio: default case of dmu_imu_rds_mess_csr_a_err_nonfatal_mapping"); `endif
                    // synopsys translate_on
                    // vlint flag_system_call on
                end // end of tbcall_region
             end
      endcase
  end
//----- reg_acc_vio: err_fatal_mapping
reg err_fatal_mapping_acc_vio;
always @(csrbus_src_bus or daemon_csrbus_wr or
         err_fatal_mapping_addr_decoded or
         daemon_transaction_in_progress)
  begin
    if (daemon_transaction_in_progress | ~err_fatal_mapping_addr_decoded)
      err_fatal_mapping_acc_vio = 1'b0;
    else
      case ({csrbus_src_bus, daemon_csrbus_wr})
        // reads
          {`FIRE_CSRBUS_SRC_BUS_ENC_JTAG, 1'b0}:
              err_fatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_SLOW, 1'b0}:
              err_fatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_MED, 1'b0}:
              err_fatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_FAST, 1'b0}:
              err_fatal_mapping_acc_vio = 1'b0;
        // writes
          {`FIRE_CSRBUS_SRC_BUS_ENC_JTAG, 1'b1}:
              err_fatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_SLOW, 1'b1}:
              err_fatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_MED, 1'b1}:
              err_fatal_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_FAST, 1'b1}:
              err_fatal_mapping_acc_vio = 1'b0;

          default:
             begin
                err_fatal_mapping_acc_vio = 1'b0;
                begin // axis tbcall_region
                      // vlint flag_system_call off
                      // synopsys translate_off
`ifdef PR_ERROR if ($time > 1 && rst_l) `PR_ERROR("dmu_imu_rds_mess_addr_decode",`MON_ERROR,"acc_vio: default case of dmu_imu_rds_mess_csr_a_err_fatal_mapping"); `endif
                    // synopsys translate_on
                    // vlint flag_system_call on
                end // end of tbcall_region
             end
      endcase
  end
//----- reg_acc_vio: pm_pme_mapping
reg pm_pme_mapping_acc_vio;
always @(csrbus_src_bus or daemon_csrbus_wr or
         pm_pme_mapping_addr_decoded or
         daemon_transaction_in_progress)
  begin
    if (daemon_transaction_in_progress | ~pm_pme_mapping_addr_decoded)
      pm_pme_mapping_acc_vio = 1'b0;
    else
      case ({csrbus_src_bus, daemon_csrbus_wr})
        // reads
          {`FIRE_CSRBUS_SRC_BUS_ENC_JTAG, 1'b0}:
              pm_pme_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_SLOW, 1'b0}:
              pm_pme_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_MED, 1'b0}:
              pm_pme_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_FAST, 1'b0}:
              pm_pme_mapping_acc_vio = 1'b0;
        // writes
          {`FIRE_CSRBUS_SRC_BUS_ENC_JTAG, 1'b1}:
              pm_pme_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_SLOW, 1'b1}:
              pm_pme_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_MED, 1'b1}:
              pm_pme_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_FAST, 1'b1}:
              pm_pme_mapping_acc_vio = 1'b0;

          default:
             begin
                pm_pme_mapping_acc_vio = 1'b0;
                begin // axis tbcall_region
                      // vlint flag_system_call off
                      // synopsys translate_off
`ifdef PR_ERROR if ($time > 1 && rst_l) `PR_ERROR("dmu_imu_rds_mess_addr_decode",`MON_ERROR,"acc_vio: default case of dmu_imu_rds_mess_csr_a_pm_pme_mapping"); `endif
                    // synopsys translate_on
                    // vlint flag_system_call on
                end // end of tbcall_region
             end
      endcase
  end
//----- reg_acc_vio: pme_to_ack_mapping
reg pme_to_ack_mapping_acc_vio;
always @(csrbus_src_bus or daemon_csrbus_wr or
         pme_to_ack_mapping_addr_decoded or
         daemon_transaction_in_progress)
  begin
    if (daemon_transaction_in_progress | ~pme_to_ack_mapping_addr_decoded)
      pme_to_ack_mapping_acc_vio = 1'b0;
    else
      case ({csrbus_src_bus, daemon_csrbus_wr})
        // reads
          {`FIRE_CSRBUS_SRC_BUS_ENC_JTAG, 1'b0}:
              pme_to_ack_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_SLOW, 1'b0}:
              pme_to_ack_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_MED, 1'b0}:
              pme_to_ack_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_FAST, 1'b0}:
              pme_to_ack_mapping_acc_vio = 1'b0;
        // writes
          {`FIRE_CSRBUS_SRC_BUS_ENC_JTAG, 1'b1}:
              pme_to_ack_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_SLOW, 1'b1}:
              pme_to_ack_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_MED, 1'b1}:
              pme_to_ack_mapping_acc_vio = 1'b0;
          {`FIRE_CSRBUS_SRC_BUS_ENC_PIO_FAST, 1'b1}:
              pme_to_ack_mapping_acc_vio = 1'b0;

          default:
             begin
                pme_to_ack_mapping_acc_vio = 1'b0;
                begin // axis tbcall_region
                      // vlint flag_system_call off
                      // synopsys translate_off
`ifdef PR_ERROR if ($time > 1 && rst_l) `PR_ERROR("dmu_imu_rds_mess_addr_decode",`MON_ERROR,"acc_vio: default case of dmu_imu_rds_mess_csr_a_pme_to_ack_mapping"); `endif
                    // synopsys translate_on
                    // vlint flag_system_call on
                end // end of tbcall_region
             end
      endcase
  end

//====================================================================
//    Status: daemon_csrbus_mapped / csrbus_acc_vio
//====================================================================
//----- OUTPUT: daemon_csrbus_mapped
assign daemon_csrbus_mapped = clocked_valid_pulse &
                                (
                                  err_cor_mapping_addr_decoded |
                                  err_nonfatal_mapping_addr_decoded |
                                  err_fatal_mapping_addr_decoded |
                                  pm_pme_mapping_addr_decoded |
                                  pme_to_ack_mapping_addr_decoded
                                );


// daemon_csrbus_mapped gets asserted after fixed number of cycles
// after daemon_csrbus_valid become high
/* 0in assert_together -name mapped_after_valid
       -leader $0in_rising_edge($0in_delay(daemon_csrbus_valid, 1))
       -follower $0in_rising_edge(daemon_csrbus_mapped)
       -message ("daemon_csrbus_mapped was not asserted 1 clock cycles from csrbus_valid")
       -module dmu_imu_rds_mess_addr_decode
       -clock clk
       -active $0in_rising_edge(daemon_csrbus_mapped)
*/

// daemon_csrbus_mapped is a pulse
/* 0in assert_timer -name daemon_csrbus_mapped_pulse
       -var daemon_csrbus_mapped -max 1
       -message "daemon_csrbus_mapped pulse length is not 1"
       -module dmu_imu_rds_mess_addr_decode
       -clock clk
*/
//----- OUTPUT: csrbus_acc_vio
assign csrbus_acc_vio = clocked_valid_pulse &
                        err_cor_mapping_acc_vio |
                        err_nonfatal_mapping_acc_vio |
                        err_fatal_mapping_acc_vio |
                        pm_pme_mapping_acc_vio |
                        pme_to_ack_mapping_acc_vio;

//====================================================================
//    Select
//====================================================================
always @(posedge clk)
  begin
     if(~rst_l)
       begin
          err_cor_mapping_select_pulse <= 1'b0;
          err_nonfatal_mapping_select_pulse <= 1'b0;
          err_fatal_mapping_select_pulse <= 1'b0;
          pm_pme_mapping_select_pulse <= 1'b0;
          pme_to_ack_mapping_select_pulse <= 1'b0;
       end
     else
       begin
          err_cor_mapping_select_pulse <=
         ~err_cor_mapping_acc_vio &
         clocked_valid_pulse &
         err_cor_mapping_addr_decoded;

          err_nonfatal_mapping_select_pulse <=
         ~err_nonfatal_mapping_acc_vio &
         clocked_valid_pulse &
         err_nonfatal_mapping_addr_decoded;

          err_fatal_mapping_select_pulse <=
         ~err_fatal_mapping_acc_vio &
         clocked_valid_pulse &
         err_fatal_mapping_addr_decoded;

          pm_pme_mapping_select_pulse <=
         ~pm_pme_mapping_acc_vio &
         clocked_valid_pulse &
         pm_pme_mapping_addr_decoded;

          pme_to_ack_mapping_select_pulse <=
         ~pme_to_ack_mapping_acc_vio &
         clocked_valid_pulse &
         pme_to_ack_mapping_addr_decoded;

        end
  end

//====================================================================
//    daemon_csrbus_wr / daemon_csrbus_wr_data
//====================================================================
always @(posedge clk)
  begin
     if(~rst_l)
       begin
          daemon_csrbus_wr_out      <= 1'b0;
          daemon_csrbus_wr_data_out <= `FIRE_CSRBUS_DATA_WIDTH'b0;
       end
     else
       begin
          daemon_csrbus_wr_out      <= daemon_csrbus_wr;
          daemon_csrbus_wr_data_out <= daemon_csrbus_wr_data;
        end
  end

//====================================================================
//    Cycle Counter: Used for ExtReadTiming / ExtWriteTiming
//====================================================================

//====================================================================
//   OUTPUT: daemon_csrbus_done (pipelining)
//====================================================================
//----- DONE for internal/extern registers
reg stage_1_daemon_csrbus_done_internal_0;
reg stage_2_daemon_csrbus_done_internal_0;

always @(posedge clk)
  begin
     if(~rst_l)
       begin
         stage_1_daemon_csrbus_done_internal_0 <= 1'b0;
       end
     else
       begin
         stage_1_daemon_csrbus_done_internal_0 <=
                 err_cor_mapping_select_pulse |
                 err_nonfatal_mapping_select_pulse |
                 err_fatal_mapping_select_pulse |
                 pm_pme_mapping_select_pulse |
                 pme_to_ack_mapping_select_pulse;
       end
     if(~rst_l)
       begin
         stage_2_daemon_csrbus_done_internal_0 <= 1'b0;
       end
     else
       begin
         stage_2_daemon_csrbus_done_internal_0 <=
                 stage_1_daemon_csrbus_done_internal_0;
       end
  end

//----- OUTPUT: daemon_csrbus_done
assign daemon_csrbus_done = daemon_csrbus_valid &
          (
            stage_2_daemon_csrbus_done_internal_0
          );

// daemon_csrbus_done gets asserted only when csrbus_valid is high
/* 0in assert -name daemon_csrbus_done_high
       -var daemon_csrbus_valid -active daemon_csrbus_done
       -message "csrbus_done got asserted while csrbus_valid is low"
       -module dmu_imu_rds_mess_addr_decode
       -clock clk
*/

// daemon_csrbus_done is a pulse
/* 0in assert_timer -name daemon_csrbus_done_pulse
       -var daemon_csrbus_done -max 1
       -message "csrbus_done pulse length is not 1"
       -module dmu_imu_rds_mess_addr_decode
       -clock clk
*/

endmodule // dmu_imu_rds_mess_addr_decode