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//////////////////////////////////////////////////////////////////////

////                                                              ////

////  File name: pci_target_unit.v                                ////

////                                                              ////

////  This file is part of the "PCI bridge" project               ////

////  http://www.opencores.org/cores/pci/                         ////

////                                                              ////

////  Author(s):                                                  ////

////      - Tadej Markovic, tadej@opencores.org                   ////

////                                                              ////

////  All additional information is avaliable in the README.txt   ////

////  file.                                                       ////

////                                                              ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

////                                                              ////

//// Copyright (C) 2000 Tadej Markovic, tadej@opencores.org       ////

////                                                              ////

//// This source file may be used and distributed without         ////

//// restriction provided that this copyright statement is not    ////

//// removed from the file and that any derivative work contains  ////

//// the original copyright notice and the associated disclaimer. ////

////                                                              ////

//// 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 2.1 of the License, or (at your option) any   ////

//// later version.                                               ////

////                                                              ////

//// This source 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; if not, download it   ////

//// from http://www.opencores.org/lgpl.shtml                     ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

//

// CVS Revision History

//

// $Log: not supported by cvs2svn $

// Revision 1.12  2003/08/08 16:36:33  tadejm

// Added 'three_left_out' to pci_pciw_fifo signaling three locations before full. Added comparison between current registered cbe and next unregistered cbe to signal wb_master whether it is allowed to performe burst or not. Due to this, I needed 'three_left_out' so that writing to pci_pciw_fifo can be registered, otherwise timing problems would occure.

//

// Revision 1.11  2003/01/27 16:49:31  mihad

// Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed.

//

// Revision 1.10  2002/10/18 03:36:37  tadejm

// Changed wrong signal name scanb_sen into scanb_en.

//

// Revision 1.9  2002/10/17 22:51:08  tadejm

// Changed BIST signals for RAMs.

//

// Revision 1.8  2002/10/11 10:09:01  mihad

// Added additional testcase and changed rst name in BIST to trst

//

// Revision 1.7  2002/10/08 17:17:05  mihad

// Added BIST signals for RAMs.

//

// Revision 1.6  2002/09/25 15:53:52  mihad

// Removed all logic from asynchronous reset network

//

// Revision 1.5  2002/03/05 11:53:47  mihad

// Added some testcases, removed un-needed fifo signals

//

// Revision 1.4  2002/02/19 16:32:37  mihad

// Modified testbench and fixed some bugs

//

// Revision 1.3  2002/02/01 15:25:13  mihad

// Repaired a few bugs, updated specification, added test bench files and design document

//

// Revision 1.2  2001/10/05 08:14:30  mihad

// Updated all files with inclusion of timescale file for simulation purposes.

//

// Revision 1.1.1.1  2001/10/02 15:33:47  mihad

// New project directory structure

//

//

// Module instantiates and connects other modules lower in hierarcy

// PCI target unit consists of modules that together form datapath

// between external WISHBONE slaves and external PCI initiators

`include "pci_constants.v"

// synopsys translate_off

`include "timescale.v"

// synopsys translate_on

module pci_target_unit

(

    reset_in,

    wb_clock_in,

    pci_clock_in,

    pciu_wbm_adr_o,

    pciu_wbm_dat_o,

    pciu_wbm_dat_i,

    pciu_wbm_cyc_o,

    pciu_wbm_stb_o,

    pciu_wbm_we_o,

    pciu_wbm_cti_o,

    pciu_wbm_bte_o,

    pciu_wbm_sel_o,

    pciu_wbm_ack_i,

    pciu_wbm_rty_i,

    pciu_wbm_err_i,

    pciu_mem_enable_in,

    pciu_io_enable_in,

    pciu_map_in,

    pciu_pref_en_in,

    pciu_conf_data_in,

    pciu_wbw_fifo_empty_in,

    pciu_wbu_del_read_comp_pending_in,

    pciu_wbu_frame_en_in,

    pciu_bar0_in,

    pciu_bar1_in,

    pciu_bar2_in,

    pciu_bar3_in,

    pciu_bar4_in,

    pciu_bar5_in,

    pciu_am0_in,

    pciu_am1_in,

    pciu_am2_in,

    pciu_am3_in,

    pciu_am4_in,

    pciu_am5_in,

    pciu_ta0_in,

    pciu_ta1_in,

    pciu_ta2_in,

    pciu_ta3_in,

    pciu_ta4_in,

    pciu_ta5_in,

    pciu_at_en_in,

    pciu_cache_line_size_in,

    pciu_cache_lsize_not_zero_in,

    pciu_pciif_frame_in,

    pciu_pciif_irdy_in,

    pciu_pciif_idsel_in,

    pciu_pciif_frame_reg_in,

    pciu_pciif_irdy_reg_in,

    pciu_pciif_idsel_reg_in,

    pciu_pciif_ad_reg_in,

    pciu_pciif_cbe_reg_in,

    pciu_pciif_cbe_in,

    pciu_pciif_bckp_trdy_en_in,

    pciu_pciif_bckp_devsel_in,

    pciu_pciif_bckp_trdy_in,

    pciu_pciif_bckp_stop_in,

    pciu_pciif_trdy_reg_in,

    pciu_pciif_stop_reg_in,

    pciu_pciif_trdy_out,

    pciu_pciif_stop_out,

    pciu_pciif_devsel_out,

    pciu_pciif_trdy_en_out,

    pciu_pciif_stop_en_out,

    pciu_pciif_devsel_en_out,

    pciu_ad_load_out,

    pciu_ad_load_on_transfer_out,

    pciu_pciif_ad_out,

    pciu_pciif_ad_en_out,

    pciu_pciif_tabort_set_out,

    pciu_err_addr_out,

    pciu_err_bc_out,

    pciu_err_data_out,

    pciu_err_be_out,

    pciu_err_signal_out,

    pciu_err_source_out,

    pciu_err_rty_exp_out,

    pciu_conf_offset_out,

    pciu_conf_renable_out,

    pciu_conf_wenable_out,

    pciu_conf_be_out,

    pciu_conf_data_out,

    pciu_conf_select_out,

    pciu_pci_drcomp_pending_out,

    pciu_pciw_fifo_empty_out

`ifdef PCI_BIST

    ,

    // debug chain signals

    scanb_rst,      // bist scan reset

    scanb_clk,      // bist scan clock

    scanb_si,       // bist scan serial in

    scanb_so,       // bist scan serial out

    scanb_en        // bist scan shift enable

`endif

);

input reset_in,

      wb_clock_in,

      pci_clock_in ;

output  [31:0]  pciu_wbm_adr_o   ;

output  [31:0]  pciu_wbm_dat_o ;

input   [31:0]  pciu_wbm_dat_i ;

output          pciu_wbm_cyc_o   ;

output          pciu_wbm_stb_o   ;

output          pciu_wbm_we_o    ;

output  [2:0]   pciu_wbm_cti_o   ;

output  [1:0]   pciu_wbm_bte_o   ;

output  [3:0]   pciu_wbm_sel_o   ;

input           pciu_wbm_ack_i   ;

input           pciu_wbm_rty_i   ;

input           pciu_wbm_err_i   ;

input           pciu_wbw_fifo_empty_in ;

input                   pciu_wbu_del_read_comp_pending_in ;

input           pciu_wbu_frame_en_in ;

input           pciu_mem_enable_in ;

input           pciu_io_enable_in ;

input   [5:0]   pciu_map_in ;

input   [5:0]   pciu_pref_en_in ;

input   [31:0]  pciu_conf_data_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_bar0_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_bar1_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_bar2_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_bar3_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_bar4_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_bar5_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_am0_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_am1_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_am2_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_am3_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_am4_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_am5_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_ta0_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_ta1_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_ta2_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_ta3_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_ta4_in ;

input   [(`PCI_NUM_OF_DEC_ADDR_LINES - 1):0] pciu_ta5_in ;

input   [5:0]                               pciu_at_en_in ;

input   [7:0]   pciu_cache_line_size_in ;

input           pciu_cache_lsize_not_zero_in ;

input           pciu_pciif_frame_in ;

input           pciu_pciif_irdy_in ;

input           pciu_pciif_idsel_in ;

input           pciu_pciif_frame_reg_in ;

input           pciu_pciif_irdy_reg_in ;

input           pciu_pciif_idsel_reg_in ;

input  [31:0]   pciu_pciif_ad_reg_in ;

input   [3:0]   pciu_pciif_cbe_reg_in ;

input   [3:0]   pciu_pciif_cbe_in;

input           pciu_pciif_bckp_trdy_en_in ;

input           pciu_pciif_bckp_devsel_in ;

input           pciu_pciif_bckp_trdy_in ;

input           pciu_pciif_bckp_stop_in ;

input           pciu_pciif_trdy_reg_in ;

input           pciu_pciif_stop_reg_in ;

output          pciu_pciif_trdy_out ;

output          pciu_pciif_stop_out ;

output          pciu_pciif_devsel_out ;

output          pciu_pciif_trdy_en_out ;

output          pciu_pciif_stop_en_out ;

output          pciu_pciif_devsel_en_out ;

output          pciu_ad_load_out ;

output          pciu_ad_load_on_transfer_out ;

output [31:0]   pciu_pciif_ad_out ;

output          pciu_pciif_ad_en_out ;

output          pciu_pciif_tabort_set_out ;

output  [31:0]  pciu_err_addr_out ;

output  [3:0]   pciu_err_bc_out ;

output  [31:0]  pciu_err_data_out ;

output  [3:0]   pciu_err_be_out ;

output          pciu_err_signal_out ;

output          pciu_err_source_out ;

output          pciu_err_rty_exp_out ;

output          pciu_conf_select_out ;

output  [11:0]  pciu_conf_offset_out ;

output          pciu_conf_renable_out ;

output          pciu_conf_wenable_out ;

output  [3:0]   pciu_conf_be_out ;

output  [31:0]  pciu_conf_data_out ;

output          pciu_pci_drcomp_pending_out ;

output          pciu_pciw_fifo_empty_out ;

`ifdef PCI_BIST

/*-----------------------------------------------------

BIST debug chain port signals

-----------------------------------------------------*/

input   scanb_rst;      // bist scan reset

input   scanb_clk;      // bist scan clock

input   scanb_si;       // bist scan serial in

output  scanb_so;       // bist scan serial out

input   scanb_en;       // bist scan shift enable

`endif

// pci target state machine and interface outputs

wire        pcit_sm_trdy_out ;

wire        pcit_sm_stop_out ;

wire        pcit_sm_devsel_out ;

wire        pcit_sm_trdy_en_out ;

wire        pcit_sm_stop_en_out ;

wire        pcit_sm_devsel_en_out ;

wire        pcit_sm_ad_load_out ;

wire        pcit_sm_ad_load_on_transfer_out ;

wire [31:0] pcit_sm_ad_out ;

wire        pcit_sm_ad_en_out ;

wire [31:0] pcit_sm_address_out ;

wire  [3:0] pcit_sm_bc_out ;

wire        pcit_sm_bc0_out ;

wire [31:0] pcit_sm_data_out ;

wire  [3:0] pcit_sm_be_out ;

wire  [3:0] pcit_sm_next_be_out ;

wire        pcit_sm_req_out ;

wire        pcit_sm_rdy_out ;

wire        pcit_sm_addr_phase_out ;

wire            pcit_sm_bckp_devsel_out ;

wire        pcit_sm_bckp_trdy_out ;

wire            pcit_sm_bckp_stop_out ;

wire        pcit_sm_last_reg_out ;

wire        pcit_sm_frame_reg_out ;

wire        pcit_sm_fetch_pcir_fifo_out ;

wire        pcit_sm_load_medium_reg_out ;

wire        pcit_sm_sel_fifo_mreg_out ;

wire        pcit_sm_sel_conf_fifo_out ;

wire        pcit_sm_fetch_conf_out ;

wire        pcit_sm_load_to_pciw_fifo_out ;

wire        pcit_sm_load_to_conf_out ;

wire        pcit_sm_target_abort_set_out ; // to conf space

assign  pciu_pciif_trdy_out             =   pcit_sm_trdy_out ;

assign  pciu_pciif_stop_out             =   pcit_sm_stop_out ;

assign  pciu_pciif_devsel_out           =   pcit_sm_devsel_out ;

assign  pciu_pciif_trdy_en_out          =   pcit_sm_trdy_en_out ;

assign  pciu_pciif_stop_en_out          =   pcit_sm_stop_en_out ;

assign  pciu_pciif_devsel_en_out        =   pcit_sm_devsel_en_out ;

assign  pciu_ad_load_out                =   pcit_sm_ad_load_out ;

assign  pciu_ad_load_on_transfer_out    =   pcit_sm_ad_load_on_transfer_out ;

assign  pciu_pciif_ad_out               =   pcit_sm_ad_out ;

assign  pciu_pciif_ad_en_out            =   pcit_sm_ad_en_out ;

assign  pciu_pciif_tabort_set_out       =   pcit_sm_target_abort_set_out ;

wire        pcit_if_addr_claim_out ;

wire [31:0] pcit_if_data_out ;

wire        pcit_if_same_read_out ;

wire        pcit_if_norm_access_to_config_out ;

wire        pcit_if_read_completed_out ;

wire        pcit_if_read_processing_out ;

wire        pcit_if_target_abort_out ;

wire        pcit_if_disconect_wo_data_out ;

wire            pcit_if_disconect_w_data_out ;

wire        pcit_if_pciw_fifo_full_out ;

wire        pcit_if_pcir_fifo_data_err_out ;

wire        pcit_if_wbw_fifo_empty_out ;

wire            pcit_if_wbu_del_read_comp_pending_out ;

wire        pcit_if_req_out ;

wire        pcit_if_done_out ;

wire        pcit_if_in_progress_out ;

wire [31:0] pcit_if_addr_out ;

wire  [3:0] pcit_if_be_out ;

wire        pcit_if_we_out ;

wire  [3:0] pcit_if_bc_out ;

wire        pcit_if_burst_ok_out ;

wire        pcit_if_pcir_fifo_renable_out ;

wire        pcit_if_pcir_fifo_flush_out ;

wire        pcit_if_pciw_fifo_wenable_out ;

wire [31:0] pcit_if_pciw_fifo_addr_data_out ;

wire  [3:0] pcit_if_pciw_fifo_cbe_out ;

wire  [3:0] pcit_if_pciw_fifo_control_out ;

wire        pcit_if_conf_hit_out ;

wire [11:0] pcit_if_conf_addr_out ;

wire [31:0] pcit_if_conf_data_out ;

wire  [3:0] pcit_if_conf_be_out ;

wire        pcit_if_conf_we_out ;

wire        pcit_if_conf_re_out ;

// pci target state machine outputs

// pci interface signals

assign  pciu_conf_select_out    =   pcit_if_conf_hit_out ;

assign  pciu_conf_offset_out    =   pcit_if_conf_addr_out ;

assign  pciu_conf_renable_out   =   pcit_if_conf_re_out ;

assign  pciu_conf_wenable_out   =   pcit_if_conf_we_out ;

assign  pciu_conf_be_out        =   pcit_if_conf_be_out ;

assign  pciu_conf_data_out      =   pcit_if_conf_data_out ;

// wishbone master state machine outputs

wire        wbm_sm_wb_read_done ;

wire            wbm_sm_write_attempt ;

wire        wbm_sm_pcir_fifo_wenable_out ;

wire [31:0] wbm_sm_pcir_fifo_data_out ;

wire  [3:0] wbm_sm_pcir_fifo_be_out ;

wire  [3:0] wbm_sm_pcir_fifo_control_out ;

wire        wbm_sm_pciw_fifo_renable_out ;

wire        wbm_sm_pci_error_sig_out ;

wire  [3:0] wbm_sm_pci_error_bc ;

wire        wbm_sm_write_rty_cnt_exp_out ;

wire        wbm_sm_error_source_out ;

wire        wbm_sm_read_rty_cnt_exp_out ;

wire        wbm_sm_cyc_out ;

wire        wbm_sm_stb_out ;

wire        wbm_sm_we_out ;

wire  [2:0] wbm_sm_cti_out ;

wire  [1:0] wbm_sm_bte_out ;

wire  [3:0] wbm_sm_sel_out ;

wire [31:0] wbm_sm_adr_out ;

wire [31:0] wbm_sm_mdata_out ;

assign  pciu_err_addr_out       =   wbm_sm_adr_out ;

assign  pciu_err_bc_out         =   wbm_sm_pci_error_bc ;

assign  pciu_err_data_out       =   wbm_sm_mdata_out ;

assign  pciu_err_be_out         =   ~wbm_sm_sel_out ;

assign  pciu_err_signal_out     =   wbm_sm_pci_error_sig_out ;

assign  pciu_err_source_out     =   wbm_sm_error_source_out ;

assign  pciu_err_rty_exp_out    =   wbm_sm_write_rty_cnt_exp_out ;

assign  pciu_wbm_adr_o       =   wbm_sm_adr_out ;

assign  pciu_wbm_dat_o       =   wbm_sm_mdata_out ;

assign  pciu_wbm_cyc_o       =   wbm_sm_cyc_out ;

assign  pciu_wbm_stb_o       =   wbm_sm_stb_out ;

assign  pciu_wbm_we_o        =   wbm_sm_we_out ;

assign  pciu_wbm_cti_o       =   wbm_sm_cti_out ;

assign  pciu_wbm_bte_o       =   wbm_sm_bte_out ;

assign  pciu_wbm_sel_o       =   wbm_sm_sel_out ;

// pciw_pcir fifo outputs

// pciw_fifo_outputs:

wire [31:0] fifos_pciw_addr_data_out ;

wire [3:0]  fifos_pciw_cbe_out ;

wire [3:0]  fifos_pciw_control_out ;

wire        fifos_pciw_three_left_out ;

wire        fifos_pciw_two_left_out ;

wire        fifos_pciw_almost_full_out ;

wire        fifos_pciw_full_out ;

wire        fifos_pciw_almost_empty_out ;

wire        fifos_pciw_empty_out ;

wire        fifos_pciw_transaction_ready_out ;

assign  pciu_pciw_fifo_empty_out = !wbm_sm_write_attempt;

// pcir_fifo_outputs

wire [31:0] fifos_pcir_data_out ;

wire [3:0]  fifos_pcir_be_out ;

wire [3:0]  fifos_pcir_control_out ;

wire        fifos_pcir_almost_empty_out ;

wire        fifos_pcir_empty_out ;

// delayed transaction logic outputs

wire [31:0] del_sync_addr_out ;

wire [3:0]  del_sync_be_out ;

wire        del_sync_we_out ;

wire        del_sync_comp_req_pending_out ;

wire        del_sync_comp_comp_pending_out ;

wire        del_sync_req_req_pending_out ;

wire        del_sync_req_comp_pending_out ;

wire [3:0]  del_sync_bc_out ;

wire        del_sync_status_out ;

wire        del_sync_comp_flush_out ;

wire        del_sync_burst_out ;

assign  pciu_pci_drcomp_pending_out = del_sync_comp_comp_pending_out ;

// WISHBONE master interface inputs

wire        wbm_sm_pci_tar_read_request             =   del_sync_comp_req_pending_out ;

wire [31:0] wbm_sm_pci_tar_address                  =   del_sync_addr_out ;

wire  [3:0] wbm_sm_pci_tar_cmd                      =   del_sync_bc_out ;

wire  [3:0] wbm_sm_pci_tar_be                       =   del_sync_be_out ;

wire        wbm_sm_pci_tar_burst_ok                 =   del_sync_burst_out ;

wire  [7:0] wbm_sm_pci_cache_line_size              =   pciu_cache_line_size_in ;

wire        wbm_sm_cache_lsize_not_zero_in          =   pciu_cache_lsize_not_zero_in ;

wire [31:0] wbm_sm_pciw_fifo_addr_data_in           =   fifos_pciw_addr_data_out ;

wire  [3:0] wbm_sm_pciw_fifo_cbe_in                 =   fifos_pciw_cbe_out ;

wire  [3:0] wbm_sm_pciw_fifo_control_in             =   fifos_pciw_control_out ;

wire        wbm_sm_pciw_fifo_almost_empty_in        =   fifos_pciw_almost_empty_out ;

wire        wbm_sm_pciw_fifo_empty_in               =   fifos_pciw_empty_out ;

wire        wbm_sm_pciw_fifo_transaction_ready_in   =   fifos_pciw_transaction_ready_out ;

wire [31:0] wbm_sm_mdata_in                         =   pciu_wbm_dat_i ;

wire        wbm_sm_ack_in                           =   pciu_wbm_ack_i ;

wire        wbm_sm_rty_in                           =   pciu_wbm_rty_i ;

wire        wbm_sm_err_in                           =   pciu_wbm_err_i ;

// WISHBONE master interface instantiation

pci_wb_master wishbone_master

(

    .wb_clock_in                    (wb_clock_in),

    .reset_in                       (reset_in),

    .pci_tar_read_request           (wbm_sm_pci_tar_read_request),  //in

    .pci_tar_address                (wbm_sm_pci_tar_address),       //in

    .pci_tar_cmd                    (wbm_sm_pci_tar_cmd),           //in

    .pci_tar_be                     (wbm_sm_pci_tar_be),            //in

    .pci_tar_burst_ok                           (wbm_sm_pci_tar_burst_ok),              //in

    .pci_cache_line_size            (wbm_sm_pci_cache_line_size),   //in

    .cache_lsize_not_zero           (wbm_sm_cache_lsize_not_zero_in),

    .wb_read_done_out               (wbm_sm_wb_read_done),          //out

    .w_attempt                                          (wbm_sm_write_attempt),                 //out

    .pcir_fifo_wenable_out          (wbm_sm_pcir_fifo_wenable_out),

    .pcir_fifo_data_out             (wbm_sm_pcir_fifo_data_out),

    .pcir_fifo_be_out               (wbm_sm_pcir_fifo_be_out),

    .pcir_fifo_control_out          (wbm_sm_pcir_fifo_control_out),

    .pciw_fifo_renable_out          (wbm_sm_pciw_fifo_renable_out),

    .pciw_fifo_addr_data_in         (wbm_sm_pciw_fifo_addr_data_in),

    .pciw_fifo_cbe_in               (wbm_sm_pciw_fifo_cbe_in),

    .pciw_fifo_control_in           (wbm_sm_pciw_fifo_control_in),

    .pciw_fifo_almost_empty_in      (wbm_sm_pciw_fifo_almost_empty_in),

    .pciw_fifo_empty_in             (wbm_sm_pciw_fifo_empty_in),

    .pciw_fifo_transaction_ready_in (wbm_sm_pciw_fifo_transaction_ready_in),

    .pci_error_sig_out              (wbm_sm_pci_error_sig_out),

    .pci_error_bc                   (wbm_sm_pci_error_bc),

    .write_rty_cnt_exp_out          (wbm_sm_write_rty_cnt_exp_out),

    .error_source_out               (wbm_sm_error_source_out),

    .read_rty_cnt_exp_out           (wbm_sm_read_rty_cnt_exp_out),

    .wb_cyc_o                      (wbm_sm_cyc_out),

    .wb_stb_o                      (wbm_sm_stb_out),

    .wb_we_o                       (wbm_sm_we_out),

    .wb_cti_o                      (wbm_sm_cti_out),

    .wb_bte_o                      (wbm_sm_bte_out),

    .wb_sel_o                      (wbm_sm_sel_out),

    .wb_adr_o                      (wbm_sm_adr_out),

    .wb_dat_i                      (wbm_sm_mdata_in),

    .wb_dat_o                      (wbm_sm_mdata_out),

    .wb_ack_i                      (wbm_sm_ack_in),

    .wb_rty_i                      (wbm_sm_rty_in),

    .wb_err_i                      (wbm_sm_err_in)

);

// pciw_pcir_fifos inputs

// PCIW_FIFO inputs

wire        fifos_pciw_wenable_in       =   pcit_if_pciw_fifo_wenable_out ;

wire [31:0] fifos_pciw_addr_data_in     =   pcit_if_pciw_fifo_addr_data_out ;

wire [3:0]  fifos_pciw_cbe_in           =   pcit_if_pciw_fifo_cbe_out ;

wire [3:0]  fifos_pciw_control_in       =   pcit_if_pciw_fifo_control_out ;

wire        fifos_pciw_renable_in       =   wbm_sm_pciw_fifo_renable_out ;

//wire        fifos_pciw_flush_in         =   1'b0 ;    // flush not used for write fifo

// PCIR_FIFO inputs

wire        fifos_pcir_wenable_in       =   wbm_sm_pcir_fifo_wenable_out ;

wire [31:0] fifos_pcir_data_in          =   wbm_sm_pcir_fifo_data_out ;

wire [3:0]  fifos_pcir_be_in            =   wbm_sm_pcir_fifo_be_out ;

wire [3:0]  fifos_pcir_control_in       =   wbm_sm_pcir_fifo_control_out ;

wire        fifos_pcir_renable_in       =   pcit_if_pcir_fifo_renable_out ;

wire        fifos_pcir_flush_in         =   pcit_if_pcir_fifo_flush_out ;

// PCIW_FIFO and PCIR_FIFO instantiation

pci_pciw_pcir_fifos fifos

(

    .wb_clock_in                (wb_clock_in),

    .pci_clock_in               (pci_clock_in),

    .reset_in                   (reset_in),

    .pciw_wenable_in            (fifos_pciw_wenable_in),      //for PCI Target !!!

    .pciw_addr_data_in          (fifos_pciw_addr_data_in),    //for PCI Target !!!

    .pciw_cbe_in                (fifos_pciw_cbe_in),          //for PCI Target !!!

    .pciw_control_in            (fifos_pciw_control_in),      //for PCI Target !!!

    .pciw_renable_in            (fifos_pciw_renable_in),

    .pciw_addr_data_out         (fifos_pciw_addr_data_out),

    .pciw_cbe_out               (fifos_pciw_cbe_out),

    .pciw_control_out           (fifos_pciw_control_out),

//    .pciw_flush_in              (fifos_pciw_flush_in),      // flush not used for write fifo

    .pciw_three_left_out        (fifos_pciw_three_left_out),  //for PCI Target !!!

    .pciw_two_left_out          (fifos_pciw_two_left_out),    //for PCI Target !!!

    .pciw_almost_full_out       (fifos_pciw_almost_full_out), //for PCI Target !!!

    .pciw_full_out              (fifos_pciw_full_out),        //for PCI Target !!!

    .pciw_almost_empty_out      (fifos_pciw_almost_empty_out),

    .pciw_empty_out             (fifos_pciw_empty_out),

    .pciw_transaction_ready_out (fifos_pciw_transaction_ready_out),

    .pcir_wenable_in            (fifos_pcir_wenable_in),

    .pcir_data_in               (fifos_pcir_data_in),

    .pcir_be_in                 (fifos_pcir_be_in),

    .pcir_control_in            (fifos_pcir_control_in),

    .pcir_renable_in            (fifos_pcir_renable_in),      //for PCI Target !!!

    .pcir_data_out              (fifos_pcir_data_out),        //for PCI Target !!!

    .pcir_be_out                (fifos_pcir_be_out),          //for PCI Target !!!

    .pcir_control_out           (fifos_pcir_control_out),     //for PCI Target !!!

    .pcir_flush_in              (fifos_pcir_flush_in),        //for PCI Target !!!

    .pcir_full_out              (),

    .pcir_almost_empty_out      (fifos_pcir_almost_empty_out), //for PCI Target !!!

    .pcir_empty_out             (fifos_pcir_empty_out),        //for PCI Target !!!

    .pcir_transaction_ready_out ()

`ifdef PCI_BIST

    ,

    .scanb_rst      (scanb_rst),

    .scanb_clk      (scanb_clk),

    .scanb_si       (scanb_si),

    .scanb_so       (scanb_so),

    .scanb_en       (scanb_en)

`endif

) ;

// delayed transaction logic inputs

wire        del_sync_req_in             =   pcit_if_req_out ;

wire        del_sync_comp_in            =   wbm_sm_wb_read_done ;

wire        del_sync_done_in            =   pcit_if_done_out ;

wire        del_sync_in_progress_in     =   pcit_if_in_progress_out ;

wire [31:0] del_sync_addr_in            =   pcit_if_addr_out ;

wire  [3:0] del_sync_be_in              =   pcit_if_be_out ;

wire        del_sync_we_in              =   pcit_if_we_out ;

wire  [3:0] del_sync_bc_in              =   pcit_if_bc_out ;

wire        del_sync_status_in          =   1'b0 ;

wire        del_sync_burst_in           =   pcit_if_burst_ok_out ;

wire        del_sync_retry_expired_in   =   wbm_sm_read_rty_cnt_exp_out ;

// delayed transaction logic instantiation

pci_delayed_sync del_sync

(

    .reset_in               (reset_in),

    .req_clk_in             (pci_clock_in),

    .comp_clk_in            (wb_clock_in),

    .req_in                 (del_sync_req_in),

    .comp_in                (del_sync_comp_in),

    .done_in                (del_sync_done_in),

    .in_progress_in         (del_sync_in_progress_in),

    .comp_req_pending_out   (del_sync_comp_req_pending_out),

    .comp_comp_pending_out  (del_sync_comp_comp_pending_out),

    .req_req_pending_out    (del_sync_req_req_pending_out),

    .req_comp_pending_out   (del_sync_req_comp_pending_out),

    .addr_in                (del_sync_addr_in),

    .be_in                  (del_sync_be_in),

    .addr_out               (del_sync_addr_out),

    .be_out                 (del_sync_be_out),

    .we_in                  (del_sync_we_in),

    .we_out                 (del_sync_we_out),

    .bc_in                  (del_sync_bc_in),

    .bc_out                 (del_sync_bc_out),

    .status_in              (del_sync_status_in),

    .status_out             (del_sync_status_out),

    .comp_flush_out         (del_sync_comp_flush_out),

    .burst_in               (del_sync_burst_in),

    .burst_out              (del_sync_burst_out),

    .retry_expired_in       (del_sync_retry_expired_in)

);

// pci target interface inputs

wire [31:0] pcit_if_address_in                      =   pcit_sm_address_out ;

wire  [3:0] pcit_if_bc_in                           =   pcit_sm_bc_out ;

wire        pcit_if_bc0_in                          =   pcit_sm_bc0_out ;

wire [31:0] pcit_if_data_in                         =   pcit_sm_data_out ;

wire  [3:0] pcit_if_be_in                           =   pcit_sm_be_out ;

wire  [3:0] pcit_if_next_be_in                      =   pcit_sm_next_be_out ;

wire        pcit_if_req_in                          =   pcit_sm_req_out ;

wire        pcit_if_rdy_in                          =   pcit_sm_rdy_out ;

wire        pcit_if_addr_phase_in                   =   pcit_sm_addr_phase_out ;

wire            pcit_if_bckp_devsel_in                                  =       pcit_sm_bckp_devsel_out ;

wire        pcit_if_bckp_trdy_in                    =   pcit_sm_bckp_trdy_out ;

wire            pcit_if_bckp_stop_in                                    =       pcit_sm_bckp_stop_out ;

wire        pcit_if_last_reg_in                     =   pcit_sm_last_reg_out ;

wire        pcit_if_frame_reg_in                    =   pcit_sm_frame_reg_out ;

wire        pcit_if_fetch_pcir_fifo_in              =   pcit_sm_fetch_pcir_fifo_out ;

wire        pcit_if_load_medium_reg_in              =   pcit_sm_load_medium_reg_out ;

wire        pcit_if_sel_fifo_mreg_in                =   pcit_sm_sel_fifo_mreg_out ;

wire        pcit_if_sel_conf_fifo_in                =   pcit_sm_sel_conf_fifo_out ;

wire        pcit_if_fetch_conf_in                   =   pcit_sm_fetch_conf_out ;

wire        pcit_if_load_to_pciw_fifo_in            =   pcit_sm_load_to_pciw_fifo_out ;

wire        pcit_if_load_to_conf_in                 =   pcit_sm_load_to_conf_out ;

wire        pcit_if_req_req_pending_in              =   del_sync_req_req_pending_out ;

wire        pcit_if_req_comp_pending_in             =   del_sync_req_comp_pending_out ;

wire        pcit_if_status_in                       =   del_sync_status_out ;

wire [31:0] pcit_if_strd_addr_in                    =   del_sync_addr_out ;

wire  [3:0] pcit_if_strd_bc_in                      =   del_sync_bc_out ;