From 3c0ce8cc00a82478170b8c60c56a172ee9b721e1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Joachim=20Stro=CC=88mbergson?= Date: Fri, 14 Dec 2018 15:20:56 +0100 Subject: Splitted the auto-zeroise test case into three separate tests. --- src/tb/tb_keywrap.v | 225 ++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 217 insertions(+), 8 deletions(-) diff --git a/src/tb/tb_keywrap.v b/src/tb/tb_keywrap.v index e0b82c4..ba23f4d 100644 --- a/src/tb/tb_keywrap.v +++ b/src/tb/tb_keywrap.v @@ -1162,22 +1162,229 @@ module tb_keywrap(); end endtask // test_big_wrap_256 + //---------------------------------------------------------------- - // test_zeroise + // 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. //---------------------------------------------------------------- - task test_zeroise; - begin : test_zeroise + task test_zeroise1; + begin : test_zeroise1 + integer i; + integer err; + + err = 0; + + $display("** TC test_zeroise1 START."); + $display("** Test of auto zeroise."); + + tc_ctr = tc_ctr + 1; + + // Write key and keylength, we also want to encrypt/wrap. + write_word(ADDR_KEY0, 32'h55aa55aa); + write_word(ADDR_KEY1, 32'h55aa55aa); + write_word(ADDR_KEY2, 32'h55aa55aa); + write_word(ADDR_KEY3, 32'h55aa55aa); + write_word(ADDR_KEY4, 32'h55aa55aa); + write_word(ADDR_KEY5, 32'h55aa55aa); + write_word(ADDR_KEY6, 32'h55aa55aa); + write_word(ADDR_KEY7, 32'h55aa55aa); + write_word(ADDR_CONFIG, 32'h00000003); + + 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. + $display("* Initializing."); + write_word(ADDR_CTRL, 32'h00000001); + #(2 * CLK_PERIOD); + wait_ready(); + $display("* Init done."); + + // Display contents in key expansion register 2 again. + $display("Contents of the key_mem[2] after init: 0x%016x", + dut.core.aes.keymem.key_mem[2]); + + // Check if key is loaded, according to the loaded flag. + read_word(ADDR_STATUS); + $display("Status register: 0b%032b", read_data); + + // Display the timeout counter a few times. + $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); + + 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("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); + read_word(ADDR_STATUS); + #(400 * CLK_PERIOD); + + + read_word(ADDR_STATUS); + $display("Status register: 0x%032b", read_data); + + + $display("** TC test_zeroise1 END.\n"); + end + endtask // test_zeroise1 + + + //---------------------------------------------------------------- + // test_zeroise2 + // Test the auto_zeroise functionality. We test that: + // 2. We can init a key and keep it alive. + //---------------------------------------------------------------- + task test_zeroise2; + begin : test_zeroise2 + integer i; + integer err; + + err = 0; + + $display("** TC test_zeroise2 START."); + $display("** Test of key keep alive.."); + + tc_ctr = tc_ctr + 1; + + // Write key and keylength, we also want to encrypt/wrap. + write_word(ADDR_KEY0, 32'h55aa55aa); + write_word(ADDR_KEY1, 32'h55aa55aa); + write_word(ADDR_KEY2, 32'h55aa55aa); + write_word(ADDR_KEY3, 32'h55aa55aa); + write_word(ADDR_KEY4, 32'h55aa55aa); + write_word(ADDR_KEY5, 32'h55aa55aa); + write_word(ADDR_KEY6, 32'h55aa55aa); + write_word(ADDR_KEY7, 32'h55aa55aa); + write_word(ADDR_CONFIG, 32'h00000003); + + 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. + $display("* Initializing."); + write_word(ADDR_CTRL, 32'h00000001); + #(2 * CLK_PERIOD); + wait_ready(); + $display("* Init done."); + + // Display contents in key expansion register 2 again. + $display("Contents of the key_mem[2] after init: 0x%016x", + dut.core.aes.keymem.key_mem[2]); + + // Check if key is loaded, according to the loaded flag. + read_word(ADDR_STATUS); + $display("Status register: 0b%032b", read_data); + + // Display the timeout counter a few times. + $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); + + 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("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); + read_word(ADDR_STATUS); + #(400 * CLK_PERIOD); + + + read_word(ADDR_STATUS); + $display("Status register: 0x%032b", read_data); + + + $display("** TC test_zeroise2 END.\n"); + end + endtask // test_zeroise2 + + + //---------------------------------------------------------------- + // test_zeroise3 + // Test the auto_zeroise functionality. We test that: + // 3. We can init a key and the force zeroisation. + //---------------------------------------------------------------- + task test_zeroise3; + begin : test_zeroise3 integer i; integer err; err = 0; - $display("** TC test_zeroise START."); - $display("** Test 1: Auto zeroise."); + $display("** TC test_zeroise3 START."); + $display("** Test of forceed zeroisation."); tc_ctr = tc_ctr + 1; @@ -1262,9 +1469,9 @@ module tb_keywrap(); $display("Status register: 0x%032b", read_data); - $display("** TC test_zeroise END.\n"); + $display("** TC test_zerois3 END.\n"); end - endtask // test_zeroise + endtask // test_zeroise3 //---------------------------------------------------------------- @@ -1295,7 +1502,9 @@ module tb_keywrap(); // test_big_wrap_256(); - test_zeroise(); + test_zeroise1(); + test_zeroise2(); + test_zeroise3(); display_test_results(); -- cgit v1.2.3