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// File intended to be included in the generate statement for each DDR2 part.

// The following loads a vmem file, "sram.vmem" by default, into the SDRAM.

// Wait until the DDR memory is initialised, and then magically

// load it

@(posedge dut.xilinx_ddr2_0.xilinx_ddr2_if0.phy_init_done);

//$display("%t: Loading DDR2",$time);

$readmemh("sram.vmem", program_array);

/* Now dish it out to the DDR2 model's memory */

for(ram_ptr = 0 ; ram_ptr < 4096 ; ram_ptr = ram_ptr + 1)

  begin

     // Construct the burst line, with every second word from where we

     // started, and picking the correct half of the word with i%2

     program_word_ptr = ram_ptr * 16 + (i/2) ; // Start on word0 or word1

     tmp_program_word = program_array[program_word_ptr];

     ddr2_ram_mem_line[15:0] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];

     program_word_ptr = program_word_ptr + 2;

     tmp_program_word = program_array[program_word_ptr];

     ddr2_ram_mem_line[31:16] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];

     program_word_ptr = program_word_ptr + 2;

     tmp_program_word = program_array[program_word_ptr];

     ddr2_ram_mem_line[47:32] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];

     program_word_ptr = program_word_ptr + 2;

     tmp_program_word = program_array[program_word_ptr];

     ddr2_ram_mem_line[63:48] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];

     program_word_ptr = program_word_ptr + 2;

     tmp_program_word = program_array[program_word_ptr];

     ddr2_ram_mem_line[79:64] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];

     program_word_ptr = program_word_ptr + 2;

     tmp_program_word = program_array[program_word_ptr];

     ddr2_ram_mem_line[95:80] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];

     program_word_ptr = program_word_ptr + 2;

     tmp_program_word = program_array[program_word_ptr];

     ddr2_ram_mem_line[111:96] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];

     program_word_ptr = program_word_ptr + 2;

     tmp_program_word = program_array[program_word_ptr];

     ddr2_ram_mem_line[127:112] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];

     // Put this assembled line into the RAM using its memory writing TASK

     u_mem0.memory_write(2'b00,ram_ptr[19:7],

                         {ram_ptr[6:0],3'b000},ddr2_ram_mem_line);

     //$display("Writing 0x%h, ramline=%d",ddr2_ram_mem_line, ram_ptr);

  end // for (ram_ptr = 0 ; ram_ptr < ...

$display("(%t) * DDR2 RAM %1d preloaded",$time, i);