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-rw-r--r--src/rtl/keywrap.v6
-rw-r--r--src/rtl/keywrap_core.v6
-rw-r--r--src/tb/tb_keywrap.v53
-rw-r--r--src/tb/tb_keywrap_core.v4
4 files changed, 63 insertions, 6 deletions
diff --git a/src/rtl/keywrap.v b/src/rtl/keywrap.v
index d6a2b5e..b41f476 100644
--- a/src/rtl/keywrap.v
+++ b/src/rtl/keywrap.v
@@ -166,6 +166,7 @@ module keywrap #(parameter ADDR_BITS = 13)
wire [63 : 0] core_a_init;
wire [63 : 0] core_a_result;
wire [31 : 0] core_api_rd_data;
+ wire core_timeout;
//----------------------------------------------------------------
@@ -198,9 +199,10 @@ module keywrap #(parameter ADDR_BITS = 13)
.valid(core_valid),
.loaded(core_loaded),
- .timeout(timeout_reg),
+ .timeout_delay(timeout_reg),
.ping(ping_reg),
.zeroise(zeroise_reg),
+ .timeout(core_timeout),
.rlen(rlen_reg),
@@ -270,7 +272,7 @@ module keywrap #(parameter ADDR_BITS = 13)
if (a1_we)
a1_reg <= write_data;
- if (zeroise_reg)
+ if (zeroise_reg || core_timeout)
begin
for (i = 0 ; i < 8 ; i = i + 1)
key_reg[i] <= 32'h0;
diff --git a/src/rtl/keywrap_core.v b/src/rtl/keywrap_core.v
index adb3099..5a6f953 100644
--- a/src/rtl/keywrap_core.v
+++ b/src/rtl/keywrap_core.v
@@ -53,9 +53,10 @@ module keywrap_core #(parameter MEM_BITS = 11)
output wire valid,
output wire loaded,
- input wire [31 : 0] timeout,
+ input wire [31 : 0] timeout_delay,
input wire ping,
input wire zeroise,
+ output wire timeout,
input wire [(MEM_BITS - 2) : 0] rlen,
@@ -205,6 +206,7 @@ module keywrap_core #(parameter MEM_BITS = 11)
assign ready = ready_reg;
assign valid = valid_reg;
assign loaded = key_loaded_reg;
+ assign timeout = key_timeout;
//----------------------------------------------------------------
@@ -396,7 +398,7 @@ module keywrap_core #(parameter MEM_BITS = 11)
if (key_timeout_ctr_set || ping)
begin
- key_timeout_ctr_new = timeout;
+ key_timeout_ctr_new = timeout_delay;
key_timeout_ctr_we = 1'h1;
end
else if (key_timeout_ctr_dec)
diff --git a/src/tb/tb_keywrap.v b/src/tb/tb_keywrap.v
index 82a827c..d0800fa 100644
--- a/src/tb/tb_keywrap.v
+++ b/src/tb/tb_keywrap.v
@@ -1236,6 +1236,12 @@ module tb_keywrap();
read_word(ADDR_STATUS);
$display("Status register: 0x%032b", read_data);
+ $display("Contents of the API key registers:");
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[0], dut.key_reg[1], dut.key_reg[2], dut.key_reg[3]);
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[4], dut.key_reg[5], dut.key_reg[6], dut.key_reg[7]);
+
// Display contents in one of the key expansion registers
$display("Contents in key_mem[2]: 0x%016x",
dut.core.aes.keymem.key_mem[2]);
@@ -1262,6 +1268,12 @@ module tb_keywrap();
$display("Contents in key_mem[2] after timeout: 0x%016x",
dut.core.aes.keymem.key_mem[2]);
+ $display("Contents of the API key registers:");
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[0], dut.key_reg[1], dut.key_reg[2], dut.key_reg[3]);
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[4], dut.key_reg[5], dut.key_reg[6], dut.key_reg[7]);
+
if (dut.core.aes.keymem.key_mem[2] != 128'h62636363626363636263636362636363)
begin
error_ctr = error_ctr + 1;
@@ -1367,6 +1379,13 @@ module tb_keywrap();
dut.core.key_timeout_ctr_reg);
read_word(ADDR_STATUS);
$display("Status register: 0x%032b", read_data);
+
+ $display("Contents of the API key registers:");
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[0], dut.key_reg[1], dut.key_reg[2], dut.key_reg[3]);
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[4], dut.key_reg[5], dut.key_reg[6], dut.key_reg[7]);
+
$display("Contents of the key_mem[2]: 0x%016x",
dut.core.aes.keymem.key_mem[2]);
@@ -1392,9 +1411,23 @@ module tb_keywrap();
#(40 * CLK_PERIOD);
read_word(ADDR_STATUS);
$display("Status register: 0x%032b", read_data);
+
+ $display("Contents of the API key registers:");
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[0], dut.key_reg[1], dut.key_reg[2], dut.key_reg[3]);
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[4], dut.key_reg[5], dut.key_reg[6], dut.key_reg[7]);
+
$display("Contents of the key_mem[2]: 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_zeroise2 END.\n");
end
endtask // test_zeroise2
@@ -1430,7 +1463,6 @@ module tb_keywrap();
// 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);
@@ -1441,6 +1473,12 @@ module tb_keywrap();
read_word(ADDR_STATUS);
$display("Status register: 0b%032b", read_data);
+ $display("Contents of the API key registers:");
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[0], dut.key_reg[1], dut.key_reg[2], dut.key_reg[3]);
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[4], dut.key_reg[5], dut.key_reg[6], dut.key_reg[7]);
+
// Display contents in key expansion register 2.
$display("Contents of the key_mem[2] after init: 0x%016x",
dut.core.aes.keymem.key_mem[2]);
@@ -1457,10 +1495,23 @@ module tb_keywrap();
read_word(ADDR_STATUS);
$display("Status register: 0x%032b", read_data);
+ $display("Contents of the API key registers:");
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[0], dut.key_reg[1], dut.key_reg[2], dut.key_reg[3]);
+ $display("0x%04x 0x%04x 0x%04x 0x%04x",
+ dut.key_reg[4], dut.key_reg[5], dut.key_reg[6], dut.key_reg[7]);
+
// Display contents in key expansion register 2.
$display("Contents of the key_mem[2] after zeroisation: 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_zerois3 END.\n");
end
endtask // test_zeroise3
diff --git a/src/tb/tb_keywrap_core.v b/src/tb/tb_keywrap_core.v
index 7f9c42d..6ec76be 100644
--- a/src/tb/tb_keywrap_core.v
+++ b/src/tb/tb_keywrap_core.v
@@ -71,6 +71,7 @@ module tb_keywrap_core();
reg [31 : 0] tb_timeout;
reg tb_ping;
reg tb_zeroise;
+ wire tb_dut_timeout;
reg [(RLEN_BITS - 1) : 0] tb_rlen;
reg [255 : 0] tb_key;
reg tb_keylen;
@@ -98,9 +99,10 @@ module tb_keywrap_core();
.valid(tb_valid),
.loaded(tb_loaded),
- .timeout(tb_timeout),
+ .timeout_delay(tb_timeout),
.ping(tb_ping),
.zeroise(tb_zeroise),
+ .timeout(tb_dut_timeout),
.rlen(tb_rlen),
.key(tb_key),
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 06:16:17 +0000