//-----------------------------------------------------------------------------
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//-----------------------------------------------------------------------------
// Project    : Series-7 Integrated Block for PCI Express
// File       : board.v
// Version    : 1.7
// Description:  Top level testbench
//
//------------------------------------------------------------------------------

`timescale 1ns/1ns

`define SIMULATION



module board;

`include "helper_tasks.v"

parameter          REF_CLK_FREQ       = 0;      // 0 - 100 MHz, 1 - 125 MHz,  2 - 250 MHz

localparam         REF_CLK_HALF_CYCLE = (REF_CLK_FREQ == 0) ? 5000 :
                                        (REF_CLK_FREQ == 1) ? 4000 :
                                        (REF_CLK_FREQ == 2) ? 2000 : 0;
integer            i;

// System-level clock and reset
reg                sys_rst_n;

wire               ep_sys_clk;
wire               rp_sys_clk;

//
// PCI-Express Serial Interconnect
//

wire  [0:0]  ep_pci_exp_txn;
wire  [0:0]  ep_pci_exp_txp;
wire  [0:0]  rp_pci_exp_txn;
wire  [0:0]  rp_pci_exp_txp;


  ////////////////////////////////
  //// Global registers declarations
  //////////////////////////////////
  // random seed
  reg [127: 0] Op_Random;

  // Generated Array
  reg [15:00]  ii;
  
  reg [31: 0]  Hdr_Array[3:0];
  reg [31: 0]  D_Array[1023:0];
  reg [10: 0]  Rx_TLP_Length;
  reg [ 7: 0]  Rx_MWr_Tag;
  reg [ 4: 0]  Rx_MRd_Tag;
  reg [31:00] 	Tx_MRd_Addr;
  reg [31:00] 	Tx_MRd_Leng;
  reg [10: 0] 	tx_MRd_Length;
  reg [ 7: 0] 	tx_MRd_Tag;
  reg [ 7: 0] 	tx_MRd_Tag_k;

  reg [31:00] 	DMA_PA;
  reg [63:00] 	DMA_HA;
  reg [63:00] 	DMA_BDA;
  reg [31:00] 	DMA_Leng;
  reg [31:00] 	DMA_L1;
  reg [31:00] 	DMA_L2;
  reg [02:00] 	DMA_bar;
  reg [31:00] 	CplD_Index;

  reg 		Desc_tx_MRd_Valid;
  reg [10:00] 	Desc_tx_MRd_Leng;
  reg [31:00] 	Desc_tx_MRd_Addr;
  reg [07:00] 	Desc_tx_MRd_TAG;
 
  reg [63:00] 	PIO_Addr;
  reg [31:00] 	PIO_Leng;
  reg [ 3:00] 	PIO_1st_BE;
  reg [15:00]   localID;
  reg           DMA_ds_is_Last;
  reg           DMA_us_is_Last;
  
//
// PCI-Express Endpoint Instance
//

bpm_pcie_k7 # (

  .PL_FAST_TRAIN("TRUE")

)
EP (

  // SYS Inteface
  .sys_clk_n(ep_sys_clk_n),
  .sys_clk_p(ep_sys_clk_p),
  .sys_rst_n(sys_rst_n),

  // PCI-Express Interface
  .pci_exp_txn(ep_pci_exp_txn),
  .pci_exp_txp(ep_pci_exp_txp),
  .pci_exp_rxn(rp_pci_exp_txn),
  .pci_exp_rxp(rp_pci_exp_txp)

);

//
// PCI-Express Model Root Port Instance
//

xilinx_pcie_2_1_rport_7x # (

  .REF_CLK_FREQ(0),
  .PL_FAST_TRAIN("TRUE"),
  .ALLOW_X8_GEN2("FALSE"),
  .C_DATA_WIDTH(64),
  .LINK_CAP_MAX_LINK_WIDTH(6'h01),
  .DEVICE_ID(16'h7100),
  .LINK_CAP_MAX_LINK_SPEED(4'h2),
  .LINK_CTRL2_TARGET_LINK_SPEED(4'h2),
  .DEV_CAP_MAX_PAYLOAD_SUPPORTED(2),
  .TRN_DW("FALSE"),
  .VC0_TX_LASTPACKET(29),
  .VC0_RX_RAM_LIMIT(13'h7FF),
  .VC0_CPL_INFINITE("TRUE"),
  .VC0_TOTAL_CREDITS_PD(437),
  .VC0_TOTAL_CREDITS_CD(461),
  .USER_CLK_FREQ(1),
  .USER_CLK2_DIV2("FALSE")
)
RP (

  // SYS Inteface
  .sys_clk(rp_sys_clk),
  .sys_rst_n(sys_rst_n),

  // PCI-Express Interface
  .pci_exp_txn(rp_pci_exp_txn),
  .pci_exp_txp(rp_pci_exp_txp),
  .pci_exp_rxn(ep_pci_exp_txn),
  .pci_exp_rxp(ep_pci_exp_txp)

);


sys_clk_gen  # (

  .halfcycle(REF_CLK_HALF_CYCLE),
  .offset(0)

)
CLK_GEN_RP (

  .sys_clk(rp_sys_clk)

);


sys_clk_gen_ds # (

  .halfcycle(REF_CLK_HALF_CYCLE),
  .offset(0)

)
CLK_GEN_EP (

  .sys_clk_p(ep_sys_clk_p),
  .sys_clk_n(ep_sys_clk_n)

);



   // Randoms generated for process flow
  always @(posedge board.EP.user_clk) begin
    Op_Random[ 31:00] = $random();
    Op_Random[ 63:32] = $random();
    Op_Random[ 95:64] = $random();
    Op_Random[127:96] = $random();
  end

    // Initialization mem in host
  initial begin
    for (ii = 0; ii< `C_ARRAY_DIMENSION; ii= ii+1) begin
`ifdef  RANDOM_SEQUENCE
      D_Array[ii]    <= $random ();
`else
      D_Array[ii]    <= Inv_Endian ('H8760_0000 + ii + 1);
`endif
    end
  end

initial begin

  $display("[%t] : System Reset Asserted...", $realtime);

  sys_rst_n = 1'b0;

  for (i = 0; i < 500; i = i + 1) begin

    @(posedge ep_sys_clk_p);

  end

  $display("[%t] : System Reset De-asserted...", $realtime);

  sys_rst_n = 1'b1;

end


initial begin

  if ($test$plusargs ("dump_all")) begin

`ifdef NCV // Cadence TRN dump

    $recordsetup("design=board",
                 "compress",
                 "wrapsize=100M",
                 "version=1",
                 "run=1");
    $recordvars();

`elsif VCS //Synopsys VPD dump

    $vcdplusfile("board.vpd");
    $vcdpluson;
    $vcdplusglitchon;
    $vcdplusflush;

`else

    // Verilog VC dump
    $dumpfile("board.vcd");
    $dumpvars(0, board);

`endif

  end

end


endmodule // BOARD
