| 1 |
412 |
julius |
// File intended to be included in the generate statement for each DDR2 part.
|
| 2 |
|
|
// The following loads a vmem file, "sram.vmem" by default, into the SDRAM.
|
| 3 |
|
|
|
| 4 |
|
|
// Wait until the DDR memory is initialised, and then magically
|
| 5 |
|
|
// load it
|
| 6 |
|
|
@(posedge dut.xilinx_ddr2_0.xilinx_ddr2_if0.phy_init_done);
|
| 7 |
|
|
//$display("%t: Loading DDR2",$time);
|
| 8 |
|
|
|
| 9 |
|
|
$readmemh("sram.vmem", program_array);
|
| 10 |
|
|
/* Now dish it out to the DDR2 model's memory */
|
| 11 |
|
|
for(ram_ptr = 0 ; ram_ptr < 4096 ; ram_ptr = ram_ptr + 1)
|
| 12 |
|
|
begin
|
| 13 |
|
|
|
| 14 |
|
|
// Construct the burst line, with every second word from where we
|
| 15 |
|
|
// started, and picking the correct half of the word with i%2
|
| 16 |
|
|
program_word_ptr = ram_ptr * 16 + (i/2) ; // Start on word0 or word1
|
| 17 |
|
|
tmp_program_word = program_array[program_word_ptr];
|
| 18 |
|
|
ddr2_ram_mem_line[15:0] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];
|
| 19 |
|
|
|
| 20 |
|
|
program_word_ptr = program_word_ptr + 2;
|
| 21 |
|
|
tmp_program_word = program_array[program_word_ptr];
|
| 22 |
|
|
ddr2_ram_mem_line[31:16] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];
|
| 23 |
|
|
|
| 24 |
|
|
program_word_ptr = program_word_ptr + 2;
|
| 25 |
|
|
tmp_program_word = program_array[program_word_ptr];
|
| 26 |
|
|
ddr2_ram_mem_line[47:32] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];
|
| 27 |
|
|
|
| 28 |
|
|
program_word_ptr = program_word_ptr + 2;
|
| 29 |
|
|
tmp_program_word = program_array[program_word_ptr];
|
| 30 |
|
|
ddr2_ram_mem_line[63:48] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];
|
| 31 |
|
|
|
| 32 |
|
|
program_word_ptr = program_word_ptr + 2;
|
| 33 |
|
|
tmp_program_word = program_array[program_word_ptr];
|
| 34 |
|
|
ddr2_ram_mem_line[79:64] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];
|
| 35 |
|
|
|
| 36 |
|
|
program_word_ptr = program_word_ptr + 2;
|
| 37 |
|
|
tmp_program_word = program_array[program_word_ptr];
|
| 38 |
|
|
ddr2_ram_mem_line[95:80] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];
|
| 39 |
|
|
|
| 40 |
|
|
program_word_ptr = program_word_ptr + 2;
|
| 41 |
|
|
tmp_program_word = program_array[program_word_ptr];
|
| 42 |
|
|
ddr2_ram_mem_line[111:96] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];
|
| 43 |
|
|
|
| 44 |
|
|
program_word_ptr = program_word_ptr + 2;
|
| 45 |
|
|
tmp_program_word = program_array[program_word_ptr];
|
| 46 |
|
|
ddr2_ram_mem_line[127:112] = tmp_program_word[15 + ((i%2)*16):((i%2)*16)];
|
| 47 |
|
|
|
| 48 |
|
|
// Put this assembled line into the RAM using its memory writing TASK
|
| 49 |
|
|
u_mem0.memory_write(2'b00,ram_ptr[19:7],
|
| 50 |
|
|
{ram_ptr[6:0],3'b000},ddr2_ram_mem_line);
|
| 51 |
|
|
|
| 52 |
|
|
//$display("Writing 0x%h, ramline=%d",ddr2_ram_mem_line, ram_ptr);
|
| 53 |
|
|
|
| 54 |
|
|
end // for (ram_ptr = 0 ; ram_ptr < ...
|
| 55 |
|
|
$display("(%t) * DDR2 RAM %1d preloaded",$time, i);
|
| 56 |
|
|
end // initial begin
|
