charan_axi_code/axi_seq_item.sv

[Yesterday 10:04 am] Mandla Ravali
class axi_seq_item extends uvm_sequence_item;
 
//factory registration for object

	'uvm_object_utils(axi_seq_item);

//////write address channel///////////////
             bit wr_rd;
             bit reset;
	randc logic [31:0] awaddr;
	rand logic [3:0]  awlen;
	rand logic [2:0]  awsize;
	rand logic [1:0]  awburst;
	rand logic [1:0] awlock;
	rand logic [3:0] awcache;
	     bit awvalid;
	     bit awready;
             bit [1:0] awlock;
	rand logic [2:0] awprot;
      	 bit [3:0] awid;
/////////write data channel//////////////
             bit [3:0] wid;
             bit [2:0] wstrb[];
          logic [7:0] wdata[];
             bit [1:0] bresp
	     bit wvalid;
	     bit wready;
	     bit wlast;
	     bit wstrb;
//////read address channel /////////////////        
         bit [3:0] arid;
        randc  logic [31:0] araddr;
	rand logic [2:0] arsize;
	rand logic [1:0] arburst;
	rand logic [3:0] arlen;
	rand logic [2:0] arprot;
	rand logic [1:0] arlock;
	rand logic [3:0] arcache;
	     bit arvalid;
	     bit arready;
 ///////////read data channel////////////
	 bit [3:0] rid;
	 logic [7:0] rdata;
	    bit  rresp;
	    bit rvalid;
	    bit rready;
	    bit rlast;
function new (input string name = "axi_seq_item");
	super.new(name);  
endfunction

////4kb boundary///////////////////

constraint awaddr_4k{ awaddr % 4096 <= {(awaddr+(awsize*awlen) % 4096;} 
constraint araddr_4k{ araddr % 4096 <= {(araddr+(arsize*arlen) % 4096;}

////last two bits of aligned address should be zero//////////

constraint ali_w_addr{ awaddr[1:0]==0;}
constraint ali_r_addr{ araddr[1:0]==0;}
//constraint burst_type{ awburst==2'b01;arburst==2'b01;}// burst type INCR 

//////id's shoud be same for read and write////////////
constraint wr_id{ wid==awid;}
constraint rd_id{ rid==arid;}
constraint rd_rid{rid inside {[wid,awid];}}
//constraint wr_id{ wid inside{[awid]};}
//constraint rd_id{ rid inside{[arid]};}

//////increment burst////////////////////////
constraint wr_data_size{if(awburst==2'b01)

                           (wdata inside{[1:((2**awsize)*16)]});}           

constraint rd_data_size{if(arburst==2'b01)

                           (rdata inside{[1:((2**arsize)*16)]});}
 
 
///// data for wrap burst///////////////////////////////////		   

constraint awdata{ if(awburst==2'b10)

                    wdata inside {((2**awsize)*2),((2**awsize)*4),((2**awsize)*8),((2**awsize)*16)};}
 
constraint ardata{ if(arburst==2'b10)

                    wdata inside {((2**arsize)*2),((2**arsize)*4),((2**arsize)*8),((2**arsize)*16)};}

endclass