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-rw-r--r--src/tb/tb_keywrap.v225
1 files 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();
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 06:02:16 +0000