awready and wready set high in master without slave value

[sazam0]

I am a newbie to axi-lite. I was trying to mimic the example figure in the documentation. I have 1x1 crossbar. My master awchannel and wchannel are the following. From the slave side I assign awready and wready to 0. But I see these signals asserts themselves in master. Is it bug, or am I missing something?

// w_en signal is external signal from testbench.
// aw channel
always_ff @(posedge clk) begin
   if (rst) begin
        awaddr  <= 32'h0;
        awvalid <= 1'b0;
        su_addr <= DEFAULT_VAL;
   end
    else if(w_en) begin
        awvalid <= 1'b1;
        awaddr <= su_addr;
    end
    else awvalid <= 1'b0;
end 

// wchannel
always_ff @(posedge clk) begin
   if(rst) begin
        wvalid <= 1'b0;
        su_data <= DEFAULT_VAL;
    end
   else if(w_en) begin
         wvalid <= 1'b1;
         wdata <= su_data;
      end
    else wvalid <= 1'b0;
end