diff options
author | Joachim StroĢmbergson <joachim@secworks.se> | 2015-08-26 15:53:40 +0200 |
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committer | Joachim StroĢmbergson <joachim@secworks.se> | 2015-08-26 15:53:40 +0200 |
commit | 01336260cf2df771cd246c131238ef70b23d3c10 (patch) | |
tree | af81b72e34bd1f2b6089bb10dff01d21f2dc4f81 /src | |
parent | 173d61b457da53a4dec607113df76ebd35a56d40 (diff) |
Adding test case for verifying reseed functionality in csprng.
Diffstat (limited to 'src')
-rw-r--r-- | src/tb/tb_csprng.v | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/tb/tb_csprng.v b/src/tb/tb_csprng.v index 0404b56..7f7823e 100644 --- a/src/tb/tb_csprng.v +++ b/src/tb/tb_csprng.v @@ -353,6 +353,7 @@ module tb_csprng(); tb_seed_data = {8{64'haaaaaaaa55555555}}; tb_seed_syn = 1'b1; + // Start pulling data. tb_cs = 1'b1; tb_we = 1'b0; tb_address = ADDR_RND_DATA; @@ -365,6 +366,46 @@ module tb_csprng(); //---------------------------------------------------------------- + // tc2_reseed_csprng() + // + // TC2: Test that the CSPRNG is reseeded as expected. + // We set the max block size to a small value and pull data. + //---------------------------------------------------------------- + task tc2_reseed_csprng(); + begin + tc_ctr = tc_ctr + 1; + + $display("*** TC2: Test reseed of CSPRNG started."); + + tb_seed_data = {8{64'h0102030405060708}}; + tb_seed_syn = 1'b1; + + // Set the max block size to a low value + tb_cs = 1'b1; + tb_we = 1'b1; + tb_address = ADDR_NUM_BLOCKS_HIGH; + tb_write_data = 32'h00000000; + #(CLK_PERIOD); + tb_address = ADDR_NUM_BLOCKS_LOW; + tb_write_data = 32'h00000001; + #(CLK_PERIOD); + tb_cs = 1'b0; + tb_we = 1'b0; + #(CLK_PERIOD); + + // Start pulling data. + tb_cs = 1'b1; + tb_we = 1'b0; + tb_address = ADDR_RND_DATA; + + #(200 * CLK_PERIOD); + + $display("*** TC2 done.."); + end + endtask // tc2_reseed_csprng + + + //---------------------------------------------------------------- // csprng_test // // The main test functionality. @@ -382,6 +423,7 @@ module tb_csprng(); dump_dut_state(); tc1_init_csprng(); + tc2_reseed_csprng(); display_test_results(); |