Initial commit of OpenSPARC T2 design and verification files.

[OpenSPARC-T2-DV] / verif / env / common / verilog / checkers / ncu / ncu_tcu_chkr.v

// ========== Copyright Header Begin ==========================================
// 
// OpenSPARC T2 Processor File: ncu_tcu_chkr.v
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module ncu_tcu_chkr();

wire por_reset_l = !`NCU.tcu_aclk;

 // 0in set_clock  -default   iol2clk   -module ncu

 // 0in default_reset `NCU.tcu_aclk -module ncu_tcu_chkr

`ifdef X_GUARD
// 0in known_driven -var ncu_tcu_stall   -name ncu_tcu_stall_x_guard -active por_reset_l -module ncu
// 0in known_driven -var tcu_ncu_vld     -name tcu_ncu_vld_x_guard   -active por_reset_l -module ncu
// 0in known_driven -var tcu_ncu_stall   -name tcu_ncu_stall_x_guard -active por_reset_l -module ncu
// 0in known_driven -var ncu_tcu_vld     -name ncu_tcu_vld_x_guard   -active por_reset_l -module ncu
`endif


//*********************************
// make sure vald and stall do not active to long  
//*********************************

reg [9:0] tcu_ncu_vld_cnt;
reg [9:0] tcu_ncu_stall_cnt;
reg [9:0] ncu_tcu_vld_cnt;
reg [9:0] ncu_tcu_stall_cnt;

/* 0in range
        -var tcu_ncu_vld_cnt
	-min 0 
        -max 16
	-clock `NCU.iol2clk
*/

/* 0in range
        -var tcu_ncu_stall_cnt
	-min 0 
        -max 1000
        -clock `NCU.iol2clk
*/

/* 0in range
        -var ncu_tcu_vld_cnt
	-min 0 
        -max 16
        -clock `NCU.iol2clk
*/

/* 0in range
        -var ncu_tcu_stall_cnt
	-min 0 
        -max 1000
        -clock `NCU.iol2clk

*/


reg tcu_ncu_stall_del ;
reg ncu_tcu_stall_del ;

always @(posedge `NCU.iol2clk) begin
  if (`NCU.tcu_ncu_vld && !ncu_tcu_stall_del) begin
        tcu_ncu_vld_cnt = tcu_ncu_vld_cnt + 1;
  end
  else if (!`NCU.tcu_ncu_vld) begin
        tcu_ncu_vld_cnt = 0;
  end

  if (tcu_ncu_stall_del) begin
        tcu_ncu_stall_cnt = tcu_ncu_stall_cnt + 1;
  end 
  else begin
        tcu_ncu_stall_cnt = 0; 
  end


  if (`NCU.ncu_tcu_vld && !tcu_ncu_stall_del) begin 
	ncu_tcu_vld_cnt = ncu_tcu_vld_cnt + 1;
  end
  else if (!`NCU.ncu_tcu_vld) begin
        ncu_tcu_vld_cnt = 0;
  end

  if (ncu_tcu_stall_del) begin 
	 ncu_tcu_stall_cnt = ncu_tcu_stall_cnt + 1;
  end 
  else begin
        ncu_tcu_stall_cnt = 0;
  end

  tcu_ncu_stall_del = `NCU.tcu_ncu_stall;
  ncu_tcu_stall_del = `NCU.ncu_tcu_stall;

end




endmodule