diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/tb/tb_keywrap.v | 158 |
1 files changed, 125 insertions, 33 deletions
diff --git a/src/tb/tb_keywrap.v b/src/tb/tb_keywrap.v index 4d1c25c..867b4a3 100644 --- a/src/tb/tb_keywrap.v +++ b/src/tb/tb_keywrap.v @@ -51,38 +51,42 @@ module tb_keywrap(); // API for the core. - localparam ADDR_NAME0 = 8'h00; - localparam ADDR_NAME1 = 8'h01; - localparam ADDR_VERSION = 8'h02; + localparam ADDR_NAME0 = 8'h00; + localparam ADDR_NAME1 = 8'h01; + localparam ADDR_VERSION = 8'h02; - localparam ADDR_CTRL = 8'h08; - localparam CTRL_INIT_BIT = 0; - localparam CTRL_NEXT_BIT = 1; + localparam ADDR_CTRL = 8'h08; + localparam CTRL_INIT_BIT = 0; + localparam CTRL_NEXT_BIT = 1; + localparam CTRL_ZEROISE_BIT = 2; - localparam ADDR_STATUS = 8'h09; - localparam STATUS_READY_BIT = 0; - localparam STATUS_VALID_BIT = 1; + localparam ADDR_STATUS = 8'h09; + localparam STATUS_READY_BIT = 0; + localparam STATUS_VALID_BIT = 1; + localparam STATUS_LOADED_BIT = 2; - localparam ADDR_CONFIG = 8'h0a; - localparam CTRL_ENCDEC_BIT = 0; - localparam CTRL_KEYLEN_BIT = 1; + localparam ADDR_CONFIG = 8'h0a; + localparam CTRL_ENCDEC_BIT = 0; + localparam CTRL_KEYLEN_BIT = 1; - localparam ADDR_RLEN = 8'h0c; - localparam ADDR_R_BANK = 8'h0d; - localparam ADDR_A0 = 8'h0e; - localparam ADDR_A1 = 8'h0f; + localparam ADDR_TIMEOUT = 8'h0b; - localparam ADDR_KEY0 = 8'h10; - localparam ADDR_KEY1 = 8'h11; - localparam ADDR_KEY2 = 8'h12; - localparam ADDR_KEY3 = 8'h13; - localparam ADDR_KEY4 = 8'h14; - localparam ADDR_KEY5 = 8'h15; - localparam ADDR_KEY6 = 8'h16; - localparam ADDR_KEY7 = 8'h17; + localparam ADDR_RLEN = 8'h0c; + localparam ADDR_R_BANK = 8'h0d; + localparam ADDR_A0 = 8'h0e; + localparam ADDR_A1 = 8'h0f; - localparam ADDR_R_DATA0 = 8'h80; - localparam ADDR_R_DATA127 = 8'hff; + localparam ADDR_KEY0 = 8'h10; + localparam ADDR_KEY1 = 8'h11; + localparam ADDR_KEY2 = 8'h12; + localparam ADDR_KEY3 = 8'h13; + localparam ADDR_KEY4 = 8'h14; + localparam ADDR_KEY5 = 8'h15; + localparam ADDR_KEY6 = 8'h16; + localparam ADDR_KEY7 = 8'h17; + + localparam ADDR_R_DATA0 = 8'h80; + localparam ADDR_R_DATA127 = 8'hff; //---------------------------------------------------------------- @@ -1055,7 +1059,6 @@ module tb_keywrap(); endtask // test_kwp_ad_128_2 - //---------------------------------------------------------------- // test_big_wrap_256 // Implements wrap test with a huge (16 kB+) data object @@ -1142,6 +1145,93 @@ module tb_keywrap(); end endtask // test_big_wrap_256 + //---------------------------------------------------------------- + // test_zeroise + // 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 + integer i; + integer err; + + err = 0; + + $display("** TC test_zeroise START."); + $display("** Test 1: 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 6 * 16 = 96 cycles. + write_word(ADDR_TIMEOUT, 32'h00000006); + + $display("Contents of the key_mem[2]: 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 one of the key expansion registers + $display("Contents of the key_mem[2]: 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: 0x%032b", read_data); + + // Display the counter a few times. + $display("Contents of the key_mem[2]: 0x%05x", + dut.core.key_timeout_ctr_reg); + #(10 * CLK_PERIOD); + $display("Contents of the key_mem[2]: 0x%05x", + dut.core.key_timeout_ctr_reg); + #(10 * CLK_PERIOD); + $display("Contents of the key_mem[2]: 0x%05x", + dut.core.key_timeout_ctr_reg); + #(10 * CLK_PERIOD); + $display("Contents of the key_mem[2]: 0x%05x", + dut.core.key_timeout_ctr_reg); + #(10 * 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]); + + #(40 * CLK_PERIOD); + + read_word(ADDR_STATUS); + $display("Status register: 0x%032b", read_data); + + + $display("** TC test_zeroise END.\n"); + end + endtask // test_zeroise + //---------------------------------------------------------------- // main @@ -1162,14 +1252,16 @@ module tb_keywrap(); reset_dut(); dump_dut_state(); - test_core_access(); +// test_core_access(); + +// test_kwp_ae_128_1(); +// test_kwp_ad_128_1(); +// test_kwp_ae_128_2(); +// test_kwp_ad_128_2(); - test_kwp_ae_128_1(); - test_kwp_ad_128_1(); - test_kwp_ae_128_2(); - test_kwp_ad_128_2(); +// test_big_wrap_256(); - test_big_wrap_256(); + test_zeroise(); display_test_results(); |