diff options
| -rw-r--r-- | src/tb/tb_keywrap.v | 80 |
1 files changed, 52 insertions, 28 deletions
diff --git a/src/tb/tb_keywrap.v b/src/tb/tb_keywrap.v index 75e01e3..ef266ab 100644 --- a/src/tb/tb_keywrap.v +++ b/src/tb/tb_keywrap.v @@ -1259,7 +1259,7 @@ module tb_keywrap(); $display("Status of timeout counter: 0x%04x", dut.core.key_timeout_ctr_reg); // Display contents in key expansion register 2 again. - $display("Contents in key_mem[2] after init: 0x%016x", + $display("Contents in key_mem[2] after timeout: 0x%016x", dut.core.aes.keymem.key_mem[2]); if (dut.core.aes.keymem.key_mem[2] != 128'h62636363626363636263636362636363) @@ -1305,16 +1305,6 @@ module tb_keywrap(); read_word(ADDR_STATUS); $display("Status register: 0x%032b", read_data); - // Set the key timeout to 256 cycles. - write_word(ADDR_TIMEOUT, 32'hdeadbeef); - read_word(ADDR_TIMEOUT); - if (read_data != 32'hdeadbeef) - $display("Error. Timout value = 0x%04x, expected 0xdeadbeef", read_data); - - // Display contents in key expansion register 2. - $display("Contents of the key_mem[2] before init: 0x%016x", - dut.core.aes.keymem.key_mem[2]); - // Initialize the AES engine (to expand the key). // Wait for init to complete. // Note, not actually needed to wait. We can write R data during init. @@ -1332,7 +1322,12 @@ module tb_keywrap(); read_word(ADDR_STATUS); $display("Status register: 0b%032b", read_data); + // Set the key timeout to 256 cycles. + $display("Setting timout to 16 cycles and then we keep it alive."); + write_word(ADDR_TIMEOUT, 32'h00000010); + // Display the timeout counter a few times. + // And then read status. Which should trigger reset of timout. $display("Contents of timeout counter: 0x%04x", dut.core.key_timeout_ctr_reg); #(2 * CLK_PERIOD); @@ -1344,33 +1339,61 @@ module tb_keywrap(); #(2 * CLK_PERIOD); $display("Contents of timeout counter: 0x%04x", dut.core.key_timeout_ctr_reg); - #(2 * CLK_PERIOD); - read_word(ADDR_STATUS); $display("Status register: 0x%032b", read_data); - // Display contents in one of the key expansion registers - $display("Contents of the key_mem[2]: 0x%016x", - dut.core.aes.keymem.key_mem[2]); - // Display contents in one of the key expansion registers - $display("Contents of the key_mem[2]: 0x%016x", - dut.core.aes.keymem.key_mem[2]); - // Display contents in one of the key expansion registers + // Display the timeout counter a few times. + // And then read status. Which should trigger reset of timout. + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + read_word(ADDR_STATUS); + $display("Status register: 0x%032b", read_data); $display("Contents of the key_mem[2]: 0x%016x", dut.core.aes.keymem.key_mem[2]); - #(40 * CLK_PERIOD); - - // Set the key timeout to 16 cycles. - // Read status to perform ping. - write_word(ADDR_TIMEOUT, 32'h00000010); + // Display the timeout counter a few times. + // And then read status. Which should trigger reset of timout. + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + #(2 * CLK_PERIOD); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); read_word(ADDR_STATUS); - #(400 * CLK_PERIOD); + $display("Status register: 0x%032b", read_data); + $display("We now allow the timer to expire"); + #(40 * CLK_PERIOD); read_word(ADDR_STATUS); $display("Status register: 0x%032b", read_data); - + $display("Contents of the key_mem[2]: 0x%016x", + dut.core.aes.keymem.key_mem[2]); $display("** TC test_zeroise2 END.\n"); end @@ -1508,8 +1531,9 @@ module tb_keywrap(); // test_big_wrap_256(); + reset_dut(); test_zeroise1(); -// test_zeroise2(); + test_zeroise2(); // test_zeroise3(); display_test_results(); |