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AXI-Verification
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manojkumar 1 år sedan
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      axi_driver.sv

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axi_driver.sv Visa fil

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class driver extends uvm_driver #(packet);

`uvm_component_utils(driver)

virtual axi_if vif;


int data_bus_byte;

packet write_address_queue [$];
packet write_address;
packet write_data_queue [$];
packet write_data;
packet write_response_queue [$];
packet read_address_queue [$];
packet read_address;
packet read_data_response_queue [$];
packet read_data;

semaphore write_address_sema = new (1);
semaphore write_data_sema = new (1);
semaphore write_data_sema_1 = new (1);
semaphore write_response_sema = new (1);
semaphore write_response_sema_1 = new (1);
semaphore read_address_sema = new (1);
semaphore read_data_response_sema = new (1);
semaphore read_data_response_sema_1 = new (1);
extern function new (string name = "driver", uvm_component parent);
extern function void build_phase (uvm_phase phase);
extern function void connect_phase (uvm_phase phase);
extern task run_phase (uvm_phase phase);
extern task send_to_dut ();
extern task write_address_channel ();
extern task write_data_channel ();
extern task fixed_burst ();
extern task incr_burst();

extern task write_response_channel ();

extern task read_address_channel ();

extern task read_data_response_channel ();

extern task rd_incr_burst();
endclass

//////////////////////////////////////// NEW FUNCTION

function driver::new (string name = "driver", uvm_component parent);

super.new (name,parent);

endfunction

/////////////////////////////////////// BUILD PHASE
virtual function void build_phase(uvm_phase phase);
super.build_phase(phase);
pkt=packet::type_id::create("pkt");
if(!uvm_config_db#(virtual axi_if)::get(this,"","vif",vif))
`uvm_error("drv","Unable to access Interface");
endfunction
///////////////////////////////////////////////////// RUN PHASE

task driver::run_phase (uvm_phase phase);

forever
begin
seq_item_port.get_next_item(req);
send_to_dut();
seq_item_port.item_done();
end
endtask

/////////////////////////////////////// SEND TO DUT

task driver::send_to_dut ();

write_address_queue.push_back (req);
write_data_queue.push_back (req);
write_response_queue.push_back (req);
read_address_queue.push_back (req);
read_data_response_queue.push_back(req);
fork
write_address_channel();
write_data_channel();
write_response_channel();
read_address_channel ();
read_data_response_channel ();
join_any

endtask

/////////////////////////////////////// WRITE ADDRESS CHANNEL

task driver::write_address_channel();

write_address_sema.get(1);
write_address = write_address_queue.pop_front();
@(vif.mas_dr);
req.control = 1;
`uvm_info("MASTER_DRIVER",$sformatf("PRINTING FROM DRIVER \n %s",write_address.sprint()),UVM_HIGH)

vif.mas_dr.awid <= write_address.awid;
vif.mas_dr.awaddr <= write_address.awaddr;
vif.mas_dr.awlen <= write_address.awlen;
vif.mas_dr.awsize <= write_address.awsize;
vif.mas_dr.awburst <= write_address.awburst;
vif.mas_dr.awvalid <= 1;

@(vif.mas_dr);
wait (vif.mas_dr.awready);

vif.mas_dr.awvalid <= 0;
write_data_sema.put(1);
write_address_sema.put(1);

repeat(2)
@(vif.mas_dr);
endtask

//////////////////////////////////////// WRITE DATA CHANNEL

task driver::write_data_channel();

write_data_sema.get(2);
write_data_sema_1.get(1);
write_data = write_data_queue.pop_front();

@(vif.mas_dr);
write_data.control = 2;
`uvm_info("MASTER_DRIVER",$sformatf("PRINTING FROM DRIVER \n %s",write_data.sprint()),UVM_HIGH)
case (write_data.awburst)

2'b00 : fixed_burst;
2'b01 : incr_burst;
2'b10 : incr_burst;

endcase
write_data_sema.put(1);
write_data_sema_1.put(1);
write_response_sema.put(1);
read_address_sema.put(1);

endtask

/////////////////////////////////////// INCREMENT BURST

task driver::incr_burst();

foreach(write_data.wdata[i])
begin
case (write_data.wstrobe[i])
4'b0001 : vif.mas_dr.wdata [7:0] <= write_data.wdata[i];
4'b0010 : vif.mas_dr.wdata [15:8] <= write_data.wdata[i];
4'b0100 : vif.mas_dr.wdata [23:16] <= write_data.wdata[i];
4'b1000 : vif.mas_dr.wdata [31:24] <= write_data.wdata[i];
4'b0011 : vif.mas_dr.wdata [15:0] <= write_data.wdata[i];
4'b1100 : vif.mas_dr.wdata [31:16] <= write_data.wdata[i];
4'b1110 : vif.mas_dr.wdata [31:8] <= write_data.wdata[i];
4'b1111 : vif.mas_dr.wdata <= write_data.wdata[i];
endcase

vif.mas_dr.wstrobe <= write_data.wstrobe[i];
vif.mas_dr.wid <= write_data.wid;
if (i == write_data.burst_len - 1)
vif.mas_dr.wlast <= 1;
else
vif.mas_dr.wlast <= 0;
vif.mas_dr.wvalid <= 1;

@(vif.mas_dr);

wait (vif.mas_dr.wready);

vif.mas_dr.wlast <= 0;
vif.mas_dr.wvalid <= 0;
@(vif.mas_dr);

end
endtask

/////////////////////////////////////// FIXED BURST

task driver::fixed_burst ();

foreach(write_data.wdata[i])
begin
case (write_data.awsize)
2'b00 : vif.mas_dr.wdata[7:0] <= write_data.wdata[i];
2'b01 : vif.mas_dr.wdata[15:0] <= write_data.wdata[i];
2'b10 : vif.mas_dr.wdata[31:0] <= write_data.wdata[i];
endcase
vif.mas_dr.wid <= write_data.wid;
if (i == write_data.burst_len - 1)
vif.mas_dr.wlast <= 1;
else
vif.mas_dr.wlast <= 0;
vif.mas_dr.wvalid <= 1;

@(vif.mas_dr);

wait (vif.mas_dr.wready);
vif.mas_dr.wlast <= 0;
vif.mas_dr.wvalid <= 0;
@(vif.mas_dr);

end
endtask


/////////////////////////////////////// WRITE RESPONSE CHANNEL

task driver::write_response_channel ();

string s;
packet write_response = packet::type_id::create("Response");

write_response_sema.get(2);
write_response_sema_1.get(1);
@(vif.mas_dr);
wait(vif.mas_dr.bvalid)
write_response.bid = vif.mas_dr.bid;
write_response.bresp = vif.mas_dr.bresp;
vif.mas_dr.bready <= 1;
@(vif.mas_dr);
foreach (write_response_queue[i])
begin
if (write_response_queue[i].awid == write_response.bid)
begin
case (write_response.bresp)

2'b00 : s = "Transaction OKAY";
2'b01 : s = "Transaction FAILED";
2'b10 : s = "SLAVE ERROR";
2'b11 : s = "DEEOCDE ERROR";
endcase
`uvm_info("MASTER_DRIVER",$sformatf("\n\n \t\t\t\t\t\t %s RESPONSE FOR THE DATA \n",s),UVM_MEDIUM)
write_response_queue[i].control = 1;
`uvm_info("MASTER_DRIVER",$sformatf("\n %s \n",write_response_queue[i].sprint),UVM_MEDIUM);
write_response_queue[i].control = 2;
`uvm_info("MASTER_DRIVER",$sformatf("\n %s \n",write_response_queue[i].sprint),UVM_MEDIUM);
write_response_queue.delete(i);
break;
end
end
vif.mas_dr.bready <= 0;
@(vif.mas_dr);

write_response_sema.put(1);
write_response_sema_1.put(1);

endtask

/////////////////////////////////////// READ ADDRESS CHANNEL

task driver::read_address_channel();

read_address_sema.get(1);
read_address = read_address_queue.pop_front();
@(vif.mas_dr);
read_address.control = 4;
`uvm_info("MASTER_DRIVER",$sformatf("PRINTING FROM DRIVER \n %s",read_address.sprint()),UVM_HIGH)

vif.mas_dr.arid <= read_address.arid;
vif.mas_dr.araddr <= read_address.araddr;
vif.mas_dr.arlen <= read_address.arlen;
vif.mas_dr.arsize <= read_address.arsize;
vif.mas_dr.arburst <= read_address.arburst;
vif.mas_dr.arvalid <= 1;

@(vif.mas_dr);
wait (vif.mas_dr.arready);

vif.mas_dr.arvalid <= 0;
read_data_response_sema.put(1);
read_address_sema.put(1);

repeat(2)
@(vif.mas_dr);
endtask

////////////////////////////////////////// READ DATA AND RESPONSE CHANNEL

task driver::read_data_response_channel();

read_data_response_sema.get(2);
read_data_response_sema_1.get(1);
read_data = read_data_response_queue.pop_front();

case (read_data.awburst)

2'b00 : rd_incr_burst;
2'b01 : rd_incr_burst;
2'b10 : rd_incr_burst;

endcase

read_data_response_sema_1.put(1);
read_data_response_sema.put(1);

endtask

////////////////////////////////////////// READ INCREMENT BURST

task driver::rd_incr_burst();

for (int i = 0;i < read_data.arlen+1; i++)
begin
wait(vif.mas_dr.rvalid);
case (read_data.arsize)
2'b00 : read_data.rdata.push_back(vif.mas_dr.rdata[7:0]);
2'b01 : read_data.rdata.push_back(vif.mas_dr.rdata[15:0]);
2'b10 : read_data.rdata.push_back(vif.mas_dr.rdata[31:0]);
endcase

case(vif.mas_dr.rresp)
2'b00 : read_data.rresp[i] = "TRANSACTION OKAY \n";
2'b01 : read_data.rresp[i] = "TRANSACTION FAILED \n";
2'b10 : read_data.rresp[i] = "SLAVE ERROR \n";
2'b11 : read_data.rresp[i] = "DECODE ERROR \n";
endcase

repeat(read_data.rready_d)
@(vif.mas_dr);

vif.mas_dr.rready <= 1;

@(vif.mas_dr);
vif.mas_dr.rready <= 0;
@(vif.mas_dr);
end

read_data.control = 5;
`uvm_info("MASTER_DRIVER",$sformatf("PRINTING FROM DRIVER \n %s",read_data.sprint()),UVM_MEDIUM)

endtask

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