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

////                                                              ////

////  File name "wb_slave_unit.v"                                 ////

////                                                              ////

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

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

////                                                              ////

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

////      - Miha Dolenc (mihad@opencores.org)                     ////

////                                                              ////

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

////  file.                                                       ////

////                                                              ////

////                                                              ////

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

////                                                              ////

//// Copyright (C) 2001 Miha Dolenc, mihad@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 1.3  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 15:33:46  mihad

// New project directory structure

//

//

// Module instantiates and connects other modules lower in hierarcy

// Wishbone slave unit consists of modules that together form datapath

// between external WISHBONE masters and external PCI targets

`include "pci_constants.v"

// synopsys translate_off

`include "timescale.v"

// synopsys translate_on

module WB_SLAVE_UNIT

(

    reset_in,

    wb_clock_in,

    pci_clock_in,

    ADDR_I,

    SDATA_I,

    SDATA_O,

    CYC_I,

    STB_I,

    WE_I,

    SEL_I,

    ACK_O,

    RTY_O,

    ERR_O,

    CAB_I,

    wbu_map_in,

    wbu_pref_en_in,

    wbu_mrl_en_in,

    wbu_pci_drcomp_pending_in,

    wbu_conf_data_in,

    wbu_pciw_empty_in,

    wbu_bar0_in,

    wbu_bar1_in,

    wbu_bar2_in,

    wbu_bar3_in,

    wbu_bar4_in,

    wbu_bar5_in,

    wbu_am0_in,

    wbu_am1_in,

    wbu_am2_in,

    wbu_am3_in,

    wbu_am4_in,

    wbu_am5_in,

    wbu_ta0_in,

    wbu_ta1_in,

    wbu_ta2_in,

    wbu_ta3_in,

    wbu_ta4_in,

    wbu_ta5_in,

    wbu_at_en_in,

    wbu_ccyc_addr_in ,

    wbu_master_enable_in,

    wbu_cache_line_size_not_zero,

    wbu_cache_line_size_in,

    wbu_pciif_gnt_in,

    wbu_pciif_frame_in,

    wbu_pciif_irdy_in,

    wbu_pciif_trdy_in,

    wbu_pciif_trdy_reg_in,

    wbu_pciif_stop_in,

    wbu_pciif_stop_reg_in,

    wbu_pciif_devsel_in,

    wbu_pciif_devsel_reg_in,

    wbu_pciif_ad_reg_in,

    wbu_pciif_req_out,

    wbu_pciif_frame_out,

    wbu_pciif_frame_en_out,

    wbu_pciif_frame_en_in,

    wbu_pciif_frame_out_in,

    wbu_pciif_frame_load_out,

    wbu_pciif_irdy_out,

    wbu_pciif_irdy_en_out,

    wbu_pciif_ad_out,

    wbu_pciif_ad_en_out,

    wbu_pciif_cbe_out,

    wbu_pciif_cbe_en_out,

    wbu_err_addr_out,

    wbu_err_bc_out,

    wbu_err_signal_out,

    wbu_err_source_out,

    wbu_err_rty_exp_out,

    wbu_tabort_rec_out,

    wbu_mabort_rec_out,

    wbu_conf_offset_out,

    wbu_conf_renable_out,

    wbu_conf_wenable_out,

    wbu_conf_be_out,

    wbu_conf_data_out,

    wbu_del_read_comp_pending_out,

    wbu_wbw_fifo_empty_out,

    wbu_latency_tim_val_in,

    wbu_ad_load_out,

    wbu_ad_load_on_transfer_out

);

input reset_in,

      wb_clock_in,

      pci_clock_in ;

input   [31:0]  ADDR_I   ;

input   [31:0]  SDATA_I  ;

output  [31:0]  SDATA_O  ;

input           CYC_I    ;

input           STB_I    ;

input           WE_I     ;

input   [3:0]   SEL_I    ;

output          ACK_O    ;

output          RTY_O    ;

output          ERR_O    ;

input           CAB_I    ;

input   [5:0]   wbu_map_in ;

input   [5:0]   wbu_pref_en_in ;

input   [5:0]   wbu_mrl_en_in ;

input           wbu_pci_drcomp_pending_in ;

input   [31:0]  wbu_conf_data_in ;

input           wbu_pciw_empty_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_bar0_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_bar1_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_bar2_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_bar3_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_bar4_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_bar5_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_am0_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_am1_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_am2_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_am3_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_am4_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_am5_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_ta0_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_ta1_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_ta2_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_ta3_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_ta4_in ;

input   [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] wbu_ta5_in ;

input   [5:0]                               wbu_at_en_in ;

input   [23:0]  wbu_ccyc_addr_in ;

input           wbu_master_enable_in ;

input                   wbu_cache_line_size_not_zero ;

input   [7:0]   wbu_cache_line_size_in ;

input           wbu_pciif_gnt_in ;

input           wbu_pciif_frame_in ;

input           wbu_pciif_frame_en_in ;

input           wbu_pciif_irdy_in ;

input           wbu_pciif_trdy_in;

input           wbu_pciif_trdy_reg_in;

input           wbu_pciif_stop_in ;

input           wbu_pciif_stop_reg_in ;

input           wbu_pciif_devsel_in ;

input           wbu_pciif_devsel_reg_in ;

input [31:0]    wbu_pciif_ad_reg_in ;

output          wbu_pciif_req_out ;

output          wbu_pciif_frame_out ;

output          wbu_pciif_frame_en_out ;

input           wbu_pciif_frame_out_in ;

output          wbu_pciif_frame_load_out ;

output          wbu_pciif_irdy_out ;

output          wbu_pciif_irdy_en_out ;

output  [31:0]  wbu_pciif_ad_out ;

output          wbu_pciif_ad_en_out ;

output  [3:0]   wbu_pciif_cbe_out ;

output          wbu_pciif_cbe_en_out ;

output  [31:0]  wbu_err_addr_out ;

output  [3:0]   wbu_err_bc_out ;

output          wbu_err_signal_out ;

output          wbu_err_source_out ;

output          wbu_err_rty_exp_out ;

output          wbu_tabort_rec_out ;

output          wbu_mabort_rec_out ;

output  [11:0]  wbu_conf_offset_out ;

output          wbu_conf_renable_out ;

output          wbu_conf_wenable_out ;

output  [3:0]   wbu_conf_be_out ;

output  [31:0]  wbu_conf_data_out ;

output          wbu_del_read_comp_pending_out ;

output          wbu_wbw_fifo_empty_out ;

input   [7:0]   wbu_latency_tim_val_in ;

output          wbu_ad_load_out ;

output          wbu_ad_load_on_transfer_out ;

// pci master interface outputs

wire [31:0] pcim_if_address_out ;

wire [3:0]  pcim_if_bc_out ;

wire [31:0] pcim_if_data_out ;

wire [3:0]  pcim_if_be_out ;

wire        pcim_if_req_out ;

wire        pcim_if_rdy_out ;

wire        pcim_if_last_out ;

wire        pcim_if_wbw_renable_out ;

wire        pcim_if_wbr_wenable_out ;

wire [31:0] pcim_if_wbr_data_out ;

wire [3:0]  pcim_if_wbr_be_out ;

wire [3:0]  pcim_if_wbr_control_out ;

wire        pcim_if_del_complete_out ;

wire        pcim_if_del_error_out ;

wire        pcim_if_del_rty_exp_out ;

wire [31:0] pcim_if_err_addr_out ;

wire [3:0]  pcim_if_err_bc_out ;

wire        pcim_if_err_signal_out ;

wire        pcim_if_err_source_out ;

wire        pcim_if_err_rty_exp_out ;

wire        pcim_if_tabort_out ;

wire        pcim_if_mabort_out ;

wire [31:0] pcim_if_next_data_out ;

wire [3:0]  pcim_if_next_be_out ;

wire        pcim_if_next_last_out ;

wire        pcim_if_posted_write_not_present_out ;

wire        pcim_sm_req_out ;

wire        pcim_sm_frame_out ;

wire        pcim_sm_frame_en_out ;

wire        pcim_sm_irdy_out ;

wire        pcim_sm_irdy_en_out ;

wire [31:0] pcim_sm_ad_out ;

wire        pcim_sm_ad_en_out ;

wire [3:0]  pcim_sm_cbe_out ;

wire        pcim_sm_cbe_en_out ;

wire        pcim_sm_ad_load_out ;

wire        pcim_sm_ad_load_on_transfer_out ;

wire        pcim_sm_wait_out ;

wire        pcim_sm_wtransfer_out ;

wire        pcim_sm_rtransfer_out ;

wire        pcim_sm_retry_out ;

wire        pcim_sm_rerror_out ;

wire        pcim_sm_first_out ;

wire        pcim_sm_mabort_out ;

wire        pcim_sm_frame_load_out ;

assign wbu_pciif_frame_load_out = pcim_sm_frame_load_out ;

assign wbu_err_addr_out     =   pcim_if_err_addr_out ;

assign wbu_err_bc_out       =   pcim_if_err_bc_out ;

assign wbu_err_signal_out   =   pcim_if_err_signal_out ;

assign wbu_err_source_out   =   pcim_if_err_source_out ;

assign wbu_err_rty_exp_out  =   pcim_if_err_rty_exp_out ;

assign wbu_tabort_rec_out   =   pcim_if_tabort_out ;

assign wbu_mabort_rec_out   =   pcim_if_mabort_out ;

assign wbu_wbw_fifo_empty_out = pcim_if_posted_write_not_present_out ;

// pci master state machine outputs

// pci interface signals

assign  wbu_pciif_req_out           =           pcim_sm_req_out ;

assign  wbu_pciif_frame_out         =           pcim_sm_frame_out ;

assign  wbu_pciif_frame_en_out      =           pcim_sm_frame_en_out ;

assign  wbu_pciif_irdy_out          =           pcim_sm_irdy_out ;

assign  wbu_pciif_irdy_en_out       =           pcim_sm_irdy_en_out ;

assign  wbu_pciif_ad_out            =           pcim_sm_ad_out ;

assign  wbu_pciif_ad_en_out         =           pcim_sm_ad_en_out ;

assign  wbu_pciif_cbe_out           =           pcim_sm_cbe_out ;

assign  wbu_pciif_cbe_en_out        =           pcim_sm_cbe_en_out ;

assign  wbu_ad_load_out             =           pcim_sm_ad_load_out ;

assign  wbu_ad_load_on_transfer_out =           pcim_sm_ad_load_on_transfer_out ;

// signals to internal of the core

wire [31:0] pcim_sm_data_out ;

// wishbone slave state machine outputs

wire [3:0]  wbs_sm_del_bc_out ;

wire        wbs_sm_del_req_out ;

wire        wbs_sm_del_done_out ;

wire        wbs_sm_del_burst_out ;

wire        wbs_sm_del_write_out ;

wire [11:0] wbs_sm_conf_offset_out ;

wire        wbs_sm_conf_renable_out ;

wire        wbs_sm_conf_wenable_out ;

wire [3:0]  wbs_sm_conf_be_out ;

wire [31:0] wbs_sm_conf_data_out ;

wire [31:0] wbs_sm_data_out ;

wire [3:0]  wbs_sm_cbe_out ;

wire        wbs_sm_wbw_wenable_out ;

wire [3:0]  wbs_sm_wbw_control_out ;

wire        wbs_sm_wbr_renable_out ;

wire        wbs_sm_wbr_flush_out ;

wire        wbs_sm_del_in_progress_out ;

wire [31:0] wbs_sm_sdata_out ;

wire        wbs_sm_ack_out ;

wire        wbs_sm_rty_out ;

wire        wbs_sm_err_out ;

wire        wbs_sm_sample_address_out ;

assign wbu_conf_offset_out  = wbs_sm_conf_offset_out ;

assign wbu_conf_renable_out = wbs_sm_conf_renable_out ;

assign wbu_conf_wenable_out = wbs_sm_conf_wenable_out ;

assign wbu_conf_be_out      = ~wbs_sm_conf_be_out ;

assign wbu_conf_data_out    = wbs_sm_conf_data_out ;

assign SDATA_O = wbs_sm_sdata_out ;

assign ACK_O   = wbs_sm_ack_out ;

assign RTY_O   = wbs_sm_rty_out ;

assign ERR_O   = wbs_sm_err_out ;

// wbw_wbr fifo outputs

// wbw_fifo_outputs:

wire [31:0] fifos_wbw_addr_data_out ;

wire [3:0]  fifos_wbw_cbe_out ;

wire [3:0]  fifos_wbw_control_out ;

wire        fifos_wbw_almost_full_out ;

wire        fifos_wbw_full_out ;

wire        fifos_wbw_empty_out ;

wire        fifos_wbw_transaction_ready_out ;

// wbr_fifo_outputs

wire [31:0] fifos_wbr_data_out ;

wire [3:0]  fifos_wbr_be_out ;

wire [3:0]  fifos_wbr_control_out ;

wire        fifos_wbr_empty_out ;

// address multiplexer outputs

wire [5:0]  amux_hit_out ;

wire [31:0] amux_address_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 wbu_del_read_comp_pending_out = del_sync_comp_comp_pending_out ;

// delayed write storage output

wire [31:0] del_write_data_out ;

// config. cycle address decoder output

wire [31:0] ccyc_addr_out ;

// WISHBONE slave interface inputs

wire [4:0]  wbs_sm_hit_in                   =       amux_hit_out[5:1] ;

wire        wbs_sm_conf_hit_in              =       amux_hit_out[0]   ;

wire [4:0]  wbs_sm_map_in                   =       wbu_map_in[5:1]        ;

wire [4:0]  wbs_sm_pref_en_in               =       wbu_pref_en_in[5:1]    ;

wire [4:0]  wbs_sm_mrl_en_in                =       wbu_mrl_en_in[5:1]     ;

wire [31:0] wbs_sm_addr_in                  =       amux_address_out ;

wire [3:0]  wbs_sm_del_bc_in                =       del_sync_bc_out  ;

wire        wbs_sm_del_req_pending_in       =       del_sync_req_req_pending_out ;

wire        wbs_sm_wb_del_comp_pending_in   =       del_sync_req_comp_pending_out ;

wire        wbs_sm_pci_drcomp_pending_in    =       wbu_pci_drcomp_pending_in ;

wire        wbs_sm_del_write_in             =       del_sync_we_out ;

wire        wbs_sm_del_error_in             =       del_sync_status_out ;

wire [31:0] wbs_sm_del_addr_in              =       del_sync_addr_out ;

wire [3:0]  wbs_sm_del_be_in                =       del_sync_be_out ;

wire [31:0] wbs_sm_conf_data_in             =       wbu_conf_data_in ;

wire        wbs_sm_wbw_almost_full_in       =       fifos_wbw_almost_full_out ;

wire        wbs_sm_wbw_full_in              =       fifos_wbw_full_out ;

wire [3:0]  wbs_sm_wbr_be_in                =       fifos_wbr_be_out ;

wire [31:0] wbs_sm_wbr_data_in              =       fifos_wbr_data_out ;

wire [3:0]  wbs_sm_wbr_control_in           =       fifos_wbr_control_out ;

wire        wbs_sm_wbr_empty_in             =       fifos_wbr_empty_out ;

wire        wbs_sm_pciw_empty_in            =       wbu_pciw_empty_in ;

wire        wbs_sm_lock_in                  =       ~wbu_master_enable_in ;

wire            wbs_sm_cache_line_size_not_zero =               wbu_cache_line_size_not_zero ;

wire        wbs_sm_cyc_in                   =       CYC_I ;

wire        wbs_sm_stb_in                   =       STB_I ;

wire        wbs_sm_we_in                    =       WE_I  ;

wire [3:0]  wbs_sm_sel_in                   =       SEL_I ;

wire [31:0] wbs_sm_sdata_in                 =       SDATA_I ;

wire        wbs_sm_cab_in                   =       CAB_I ;

wire [31:0] wbs_sm_ccyc_addr_in             =       ccyc_addr_out ;

// WISHBONE slave interface instantiation

WB_SLAVE wishbone_slave(

                        .wb_clock_in              (wb_clock_in) ,

                        .reset_in                 (reset_in) ,

                        .wb_hit_in                (wbs_sm_hit_in) ,

                        .wb_conf_hit_in           (wbs_sm_conf_hit_in) ,

                        .wb_map_in                (wbs_sm_map_in) ,

                        .wb_pref_en_in            (wbs_sm_pref_en_in) ,

                        .wb_mrl_en_in             (wbs_sm_mrl_en_in) ,

                        .wb_addr_in               (wbs_sm_addr_in),

                        .del_bc_in                (wbs_sm_del_bc_in),

                        .wb_del_req_pending_in    (wbs_sm_del_req_pending_in),

                        .wb_del_comp_pending_in   (wbs_sm_wb_del_comp_pending_in),

                        .pci_drcomp_pending_in    (wbs_sm_pci_drcomp_pending_in),

                        .del_bc_out               (wbs_sm_del_bc_out),

                        .del_req_out              (wbs_sm_del_req_out),

                        .del_done_out             (wbs_sm_del_done_out),

                        .del_burst_out            (wbs_sm_del_burst_out),

                        .del_write_out            (wbs_sm_del_write_out),

                        .del_write_in             (wbs_sm_del_write_in),

                        .del_error_in             (wbs_sm_del_error_in),

                        .wb_del_addr_in           (wbs_sm_del_addr_in),

                        .wb_del_be_in             (wbs_sm_del_be_in),

                        .wb_conf_offset_out       (wbs_sm_conf_offset_out),

                        .wb_conf_renable_out      (wbs_sm_conf_renable_out),

                        .wb_conf_wenable_out      (wbs_sm_conf_wenable_out),

                        .wb_conf_be_out           (wbs_sm_conf_be_out),

                        .wb_conf_data_in          (wbs_sm_conf_data_in),

                        .wb_conf_data_out         (wbs_sm_conf_data_out),

                        .wb_data_out              (wbs_sm_data_out),

                        .wb_cbe_out               (wbs_sm_cbe_out),

                        .wbw_fifo_wenable_out     (wbs_sm_wbw_wenable_out),

                        .wbw_fifo_control_out     (wbs_sm_wbw_control_out),

                        .wbw_fifo_almost_full_in  (wbs_sm_wbw_almost_full_in),

                        .wbw_fifo_full_in         (wbs_sm_wbw_full_in),

                        .wbr_fifo_renable_out     (wbs_sm_wbr_renable_out),

                        .wbr_fifo_be_in           (wbs_sm_wbr_be_in),

                        .wbr_fifo_data_in         (wbs_sm_wbr_data_in),

                        .wbr_fifo_control_in      (wbs_sm_wbr_control_in),

                        .wbr_fifo_flush_out       (wbs_sm_wbr_flush_out),

                        .wbr_fifo_empty_in        (wbs_sm_wbr_empty_in),

                        .pciw_fifo_empty_in       (wbs_sm_pciw_empty_in),

                        .wbs_lock_in              (wbs_sm_lock_in),

                        .cache_line_size_not_zero (wbs_sm_cache_line_size_not_zero),

                        .del_in_progress_out      (wbs_sm_del_in_progress_out),

                        .ccyc_addr_in             (wbs_sm_ccyc_addr_in),

                        .sample_address_out       (wbs_sm_sample_address_out),

                        .CYC_I                    (wbs_sm_cyc_in),

                        .STB_I                    (wbs_sm_stb_in),

                        .WE_I                     (wbs_sm_we_in),

                        .SEL_I                    (wbs_sm_sel_in),

                        .SDATA_I                  (wbs_sm_sdata_in),

                        .SDATA_O                  (wbs_sm_sdata_out),

                        .ACK_O                    (wbs_sm_ack_out),

                        .RTY_O                    (wbs_sm_rty_out),

                        .ERR_O                    (wbs_sm_err_out),

                        .CAB_I                    (wbs_sm_cab_in)

                       );

// wbw_wbr_fifos inputs

// WBW_FIFO inputs

wire        fifos_wbw_wenable_in        =       wbs_sm_wbw_wenable_out;

wire [31:0] fifos_wbw_addr_data_in      =       wbs_sm_data_out ;

wire [3:0]  fifos_wbw_cbe_in            =       wbs_sm_cbe_out ;

wire [3:0]  fifos_wbw_control_in        =       wbs_sm_wbw_control_out ;

wire        fifos_wbw_renable_in        =       pcim_if_wbw_renable_out ;

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

// WBR_FIFO inputs

wire        fifos_wbr_wenable_in        =       pcim_if_wbr_wenable_out ;

wire [31:0] fifos_wbr_data_in           =       pcim_if_wbr_data_out ;

wire [3:0]  fifos_wbr_be_in             =       pcim_if_wbr_be_out ;

wire [3:0]  fifos_wbr_control_in        =       pcim_if_wbr_control_out ;

wire        fifos_wbr_renable_in        =       wbs_sm_wbr_renable_out ;

wire        fifos_wbr_flush_in          =       wbs_sm_wbr_flush_out || del_sync_comp_flush_out ;

// WBW_FIFO and WBR_FIFO instantiation

WBW_WBR_FIFOS fifos(

                    .wb_clock_in               (wb_clock_in),

                    .pci_clock_in              (pci_clock_in),

                    .reset_in                  (reset_in),

                    .wbw_wenable_in            (fifos_wbw_wenable_in),

                    .wbw_addr_data_in          (fifos_wbw_addr_data_in),

                    .wbw_cbe_in                (fifos_wbw_cbe_in),

                    .wbw_control_in            (fifos_wbw_control_in),

                    .wbw_renable_in            (fifos_wbw_renable_in),

                    .wbw_addr_data_out         (fifos_wbw_addr_data_out),

                    .wbw_cbe_out               (fifos_wbw_cbe_out),

                    .wbw_control_out           (fifos_wbw_control_out),

//                    .wbw_flush_in              (fifos_wbw_flush_in),        // flush for write fifo not used

                    .wbw_almost_full_out       (fifos_wbw_almost_full_out),

                    .wbw_full_out              (fifos_wbw_full_out),

                    .wbw_empty_out             (fifos_wbw_empty_out),

                    .wbw_transaction_ready_out (fifos_wbw_transaction_ready_out),

                    .wbr_wenable_in            (fifos_wbr_wenable_in),

                    .wbr_data_in               (fifos_wbr_data_in),

                    .wbr_be_in                 (fifos_wbr_be_in),

                    .wbr_control_in            (fifos_wbr_control_in),

                    .wbr_renable_in            (fifos_wbr_renable_in),

                    .wbr_data_out              (fifos_wbr_data_out),

                    .wbr_be_out                (fifos_wbr_be_out),

                    .wbr_control_out           (fifos_wbr_control_out),

                    .wbr_flush_in              (fifos_wbr_flush_in),

                    .wbr_empty_out             (fifos_wbr_empty_out)

                   ) ;

wire [31:0] amux_addr_in  = ADDR_I ;

wire        amux_sample_address_in = wbs_sm_sample_address_out ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_bar0_in   =   wbu_bar0_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_bar1_in   =   wbu_bar1_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_bar2_in   =   wbu_bar2_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_bar3_in   =   wbu_bar3_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_bar4_in   =   wbu_bar4_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_bar5_in   =   wbu_bar5_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_am0_in    =   wbu_am0_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_am1_in    =   wbu_am1_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_am2_in    =   wbu_am2_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_am3_in    =   wbu_am3_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_am4_in    =   wbu_am4_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_am5_in    =   wbu_am5_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_ta0_in    =   wbu_ta0_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_ta1_in    =   wbu_ta1_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_ta2_in    =   wbu_ta2_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_ta3_in    =   wbu_ta3_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_ta4_in    =   wbu_ta4_in ;

wire [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] amux_ta5_in    =   wbu_ta5_in ;

wire [5:0]  amux_at_en_in = wbu_at_en_in ;

WB_ADDR_MUX wb_addr_dec

(

    `ifdef REGISTER_WBS_OUTPUTS

    .clk_in      (wb_clock_in),

    .reset_in    (reset_in),

    .sample_address_in (amux_sample_address_in),

    `endif

    .address_in  (amux_addr_in),

    .bar0_in     (amux_bar0_in),

    .bar1_in     (amux_bar1_in),

    .bar2_in     (amux_bar2_in),

    .bar3_in     (amux_bar3_in),

    .bar4_in     (amux_bar4_in),

    .bar5_in     (amux_bar5_in),

    .am0_in      (amux_am0_in),

    .am1_in      (amux_am1_in),

    .am2_in      (amux_am2_in),

    .am3_in      (amux_am3_in),

    .am4_in      (amux_am4_in),

    .am5_in      (amux_am5_in),

    .ta0_in      (amux_ta0_in),

    .ta1_in      (amux_ta1_in),

    .ta2_in      (amux_ta2_in),

    .ta3_in      (amux_ta3_in),

    .ta4_in      (amux_ta4_in),

    .ta5_in      (amux_ta5_in),

    .at_en_in    (amux_at_en_in),

    .hit_out     (amux_hit_out),

    .address_out (amux_address_out)

);

// delayed transaction logic inputs

wire        del_sync_req_in             =       wbs_sm_del_req_out ;

wire        del_sync_comp_in            =       pcim_if_del_complete_out ;

wire        del_sync_done_in            =       wbs_sm_del_done_out ;

wire        del_sync_in_progress_in     =       wbs_sm_del_in_progress_out ;

wire [31:0] del_sync_addr_in            =       wbs_sm_data_out ;

wire [3:0]  del_sync_be_in              =       wbs_sm_conf_be_out ;

wire        del_sync_we_in              =       wbs_sm_del_write_out ;

wire [3:0]  del_sync_bc_in              =       wbs_sm_del_bc_out ;

wire        del_sync_status_in          =       pcim_if_del_error_out ;

wire        del_sync_burst_in           =       wbs_sm_del_burst_out ;

wire        del_sync_retry_expired_in   =       pcim_if_del_rty_exp_out ;

// delayed transaction logic instantiation

DELAYED_SYNC del_sync  (

                            .reset_in             (reset_in),

                            .req_clk_in           (wb_clock_in),

                            .comp_clk_in          (pci_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)

                        );

// delayed write storage inputs

wire        del_write_we_in         =       wbs_sm_del_req_out && wbs_sm_del_write_out ;

wire [31:0] del_write_data_in       =       wbs_sm_conf_data_out ;