//=============================AXI TRANSACTION CLASSS ==========================================//
class axi_seq_item extends uvm_sequence_item;

//FACTORY REGISTRATION 

	'uvm_object_utils(axi_seq_item);

//WRITE ADDRESS CHANNEL
	rand logic [31:0] AWADDR;
	rand logic [3:0]  AWLEN;
	rand logic [2:0]  AWSIZE;
	rand logic [1:0]  AWBURST;
	       bit        AWVALID;
	       bit        AWREADY;
               bit [1:0]  AWLOCK;
	rand logic [2:0]  AWPROT;
	rand logic [3:0]  AWCACHE;
	rand   bit [3:0]  AWID;

//WRITE DATA CHANNEL
          rand bit [3:0]  WID;
               bit [2:0]  WSTRB;
        rand logic [7:0]  WDATA;
	       bit        WVALID;
	       bit        WREADY;
	       bit        WLAST;
//WRITE RESPONSE CHANNEL
               bit [1:0]  BRESP;
	       bit        BVALID;
	       bit        BREADY;

//READ ADDRESS CHANNEL         
        rand   bit [3:0]  ARID;
        rand 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 [3:0]  ARCACHE;
	rand logic [1:0]  AELOCK;
	       bit        ARVALID;
	       bit        ARREADY;

//READ DATA CHANNEL
	       bit [3:0]  RID;
	     logic [7:0]  RDATA;
	       bit [1:0]  RRESP;
	       bit        RVALID;
	       bit        RREADY;
	       bit [3:0]  RSTRB;
	       bit        RLAST;


//==============================================4kb boundary=====================================//
constraint awaddr_4k{ AWADDR % 4096 + (AWLEN + (1 << AWSIZE) <= 4096;} 
constraint araddr_4k{ ARADDR % 4096 + (ARLEN + (1 << ARSIZE) <= 4096;} 

//==============================================id must be same for bot read/write operation =====================================//
constraint ali_w_addr{ AWID==ARID;}
constraint ali_r_addr{WID==RID;}

//==============================================burst type always not reserved=====================================//
constraint burst_type{ AWBURST!=2'b11; ARBURST!=2'b11;}

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)]});} 



constraint wrap_data{ if(AWBURST==2'b10)
                    WDATA inside {((2**AWSIZE)*2),((2**AWSIZE)*4),((2**AWSIZE)*8),((2**AWSIZE)*16)};}

	   
endclass


        	
	
//=============================AXI SEQUENCE CLASSS ==========================================//
class axi_wrap_sequence extends uvm_sequence #(axi_seq_item);

	`uvm_object_utills(axi_wrap_sequence)
	axi_wrap_sequence wrap_xtn;

	function new(string name ="axi_wrap_sequene")
		super.new(name);
	endfunction
	
	task body();
		repeat(10)
		begin
		wrap_xtn=axi_seq_item::type_id::create("wrap_xtn");
		start_item(wrap_xtn);
		assert(wrap_xtn.randomize() with {AWBURST==2;});
		finish_item(wrap_xtn);
	end
endtask
endclass


       	
	
//=============================AXI SEQUENCE CLASSS ==========================================//
class axi_wrap_read_seq extends uvm_sequence #(axi_seq_item);

	`uvm_object_utills(axi_wrap_read_seq)
	axi_wrap_sequence rwrap_xtn;

	function new(string name ="axi_wrap_read_seq")
		super.new(name);
	endfunction

	task body();
		repeat(10)
		begin
		rwrap_xtn=axi_seq_item::type_id::create("rwrap_xtn");
		start_item(rwrap_xtn);
		assert(rwrap_xtn.randomize() with {ARBURST==2;});
		finish_item(rwrap_xtn);
	end
endtask
endclass