diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/tb/tb_keywrap.v | 66 |
1 files changed, 36 insertions, 30 deletions
diff --git a/src/tb/tb_keywrap.v b/src/tb/tb_keywrap.v index ba23f4d..75e01e3 100644 --- a/src/tb/tb_keywrap.v +++ b/src/tb/tb_keywrap.v @@ -39,10 +39,10 @@ module tb_keywrap(); - parameter DEBUG = 1; + parameter DEBUG = 0; parameter DUMP_TOP = 0; parameter DUMP_CORE = 0; - parameter DUMP_TIMEOUT = 1; + parameter DUMP_TIMEOUT = 0; parameter CLK_HALF_PERIOD = 1; parameter CLK_PERIOD = 2 * CLK_HALF_PERIOD; @@ -1166,16 +1166,10 @@ module tb_keywrap(); //---------------------------------------------------------------- // test_zeroise1 // Test the auto_zeroise functionality. We test that: - // 1. We can init a key and have it auto zeroise. - // 2. We can init a key and keep it alive. - // 3. We can init a key and the force zeroisation. + // 1. We can init a key and have it be auto zeroised. //---------------------------------------------------------------- task test_zeroise1; begin : test_zeroise1 - integer i; - integer err; - - err = 0; $display("** TC test_zeroise1 START."); $display("** Test of auto zeroise."); @@ -1196,19 +1190,21 @@ module tb_keywrap(); read_word(ADDR_STATUS); $display("Status register: 0x%032b", read_data); - // Set the key timeout to 256 cycles. + // Set the key timeout to 0xdeadbeef 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); + begin + error_ctr = error_ctr + 1; + $display("Error. Timeout value = 0x%04x, expected 0xdeadbeef", read_data); + end // Display contents in key expansion register 2. - $display("Contents of the key_mem[2] before init: 0x%016x", + $display("Contents in 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. $display("* Initializing."); write_word(ADDR_CTRL, 32'h00000001); #(2 * CLK_PERIOD); @@ -1216,7 +1212,7 @@ module tb_keywrap(); $display("* Init done."); // Display contents in key expansion register 2 again. - $display("Contents of the key_mem[2] after init: 0x%016x", + $display("Contents in key_mem[2] after init: 0x%016x", dut.core.aes.keymem.key_mem[2]); // Check if key is loaded, according to the loaded flag. @@ -1224,16 +1220,16 @@ module tb_keywrap(); $display("Status register: 0b%032b", read_data); // Display the timeout counter a few times. - $display("Contents of timeout counter: 0x%04x", + $display("Status of timeout counter: 0x%04x", dut.core.key_timeout_ctr_reg); #(2 * CLK_PERIOD); - $display("Contents of timeout counter: 0x%04x", + $display("Status of timeout counter: 0x%04x", dut.core.key_timeout_ctr_reg); #(2 * CLK_PERIOD); - $display("Contents of timeout counter: 0x%04x", + $display("Status timeout counter: 0x%04x", dut.core.key_timeout_ctr_reg); #(2 * CLK_PERIOD); - $display("Contents of timeout counter: 0x%04x", + $display("Status of timeout counter: 0x%04x", dut.core.key_timeout_ctr_reg); #(2 * CLK_PERIOD); @@ -1241,27 +1237,37 @@ module tb_keywrap(); $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("Contents of the key_mem[2]: 0x%016x", + $display("Contents in 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. + $display("Setting the timeout to 0x10 cycles and checking status."); write_word(ADDR_TIMEOUT, 32'h00000010); read_word(ADDR_STATUS); - #(400 * CLK_PERIOD); + #(CLK_PERIOD); + read_word(ADDR_STATUS); + $display("Contents of timeout counter: 0x%04x", + dut.core.key_timeout_ctr_reg); + + $display("Waiting 0x40 cycles."); + #(64 * CLK_PERIOD); read_word(ADDR_STATUS); $display("Status register: 0x%032b", read_data); + $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", + dut.core.aes.keymem.key_mem[2]); + if (dut.core.aes.keymem.key_mem[2] != 128'h62636363626363636263636362636363) + begin + error_ctr = error_ctr + 1; + $display("Error. Contents in key_mem[2]: 0x%016x, expected 0x62636363626363636263636362636363", + dut.core.aes.keymem.key_mem[2]); + end $display("** TC test_zeroise1 END.\n"); end @@ -1503,8 +1509,8 @@ module tb_keywrap(); // test_big_wrap_256(); test_zeroise1(); - test_zeroise2(); - test_zeroise3(); +// test_zeroise2(); +// test_zeroise3(); display_test_results(); |