diff options
| -rw-r--r-- | src/tb/tb_sha256_core.v | 307 |
1 files changed, 218 insertions, 89 deletions
diff --git a/src/tb/tb_sha256_core.v b/src/tb/tb_sha256_core.v index df0cafc..5fef6cf 100644 --- a/src/tb/tb_sha256_core.v +++ b/src/tb/tb_sha256_core.v @@ -8,30 +8,30 @@ // Author: Joachim Strombergson // Copyright (c) 2014, SUNET // All rights reserved. -// -// Redistribution and use in source and binary forms, with or -// without modification, are permitted provided that the following -// conditions are met: -// -// 1. Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// -// 2. Redistributions in binary form must reproduce the above copyright -// notice, this list of conditions and the following disclaimer in -// the documentation and/or other materials provided with the -// distribution. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +// +// Redistribution and use in source and binary forms, with or +// without modification, are permitted provided that the following +// conditions are met: +// +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in +// the documentation and/or other materials provided with the +// distribution. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, -// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // //====================================================================== @@ -46,7 +46,7 @@ // Test module. //------------------------------------------------------------------ module tb_sha256_core(); - + //---------------------------------------------------------------- // Internal constant and parameter definitions. //---------------------------------------------------------------- @@ -54,8 +54,8 @@ module tb_sha256_core(); parameter CLK_HALF_PERIOD = 2; parameter CLK_PERIOD = 2 * CLK_HALF_PERIOD; - - + + //---------------------------------------------------------------- // Register and Wire declarations. //---------------------------------------------------------------- @@ -68,41 +68,60 @@ module tb_sha256_core(); reg tb_init; reg tb_next; reg [511 : 0] tb_block; + reg [31 : 0] tb_state_wr_data; + reg tb_state0_we; + reg tb_state1_we; + reg tb_state2_we; + reg tb_state3_we; + reg tb_state4_we; + reg tb_state5_we; + reg tb_state6_we; + reg tb_state7_we; wire tb_ready; wire [255 : 0] tb_digest; wire tb_digest_valid; - - + + //---------------------------------------------------------------- // Device Under Test. //---------------------------------------------------------------- sha256_core dut( - .clk(tb_clk), - .reset_n(tb_reset_n), - - .init(tb_init), - .next(tb_next), - - .block(tb_block), - - .ready(tb_ready), - - .digest(tb_digest), - .digest_valid(tb_digest_valid) + .clk(tb_clk), + .reset_n(tb_reset_n), + + .init(tb_init), + .next(tb_next), + + .block(tb_block), + + .state_wr_data(tb_state_wr_data), + .state0_we(tb_state0_we), + .state1_we(tb_state1_we), + .state2_we(tb_state2_we), + .state3_we(tb_state3_we), + .state4_we(tb_state4_we), + .state5_we(tb_state5_we), + .state6_we(tb_state6_we), + .state7_we(tb_state7_we), + + .ready(tb_ready), + + .digest(tb_digest), + .digest_valid(tb_digest_valid) ); - + //---------------------------------------------------------------- // clk_gen // // Always running clock generator process. //---------------------------------------------------------------- - always + always begin : clk_gen #CLK_HALF_PERIOD; tb_clk = !tb_clk; end // clk_gen - + //---------------------------------------------------------------- // sys_monitor() @@ -120,7 +139,7 @@ module tb_sha256_core(); end end - + //---------------------------------------------------------------- // dump_dut_state() // @@ -131,40 +150,40 @@ module tb_sha256_core(); $display("State of DUT"); $display("------------"); $display("Inputs and outputs:"); - $display("init = 0x%01x, next = 0x%01x", + $display("init = 0x%01x, next = 0x%01x", dut.init, dut.next); $display("block = 0x%0128x", dut.block); - $display("ready = 0x%01x, valid = 0x%01x", + $display("ready = 0x%01x, valid = 0x%01x", dut.ready, dut.digest_valid); $display("digest = 0x%064x", dut.digest); - $display("H0_reg = 0x%08x, H1_reg = 0x%08x, H2_reg = 0x%08x, H3_reg = 0x%08x", + $display("H0_reg = 0x%08x, H1_reg = 0x%08x, H2_reg = 0x%08x, H3_reg = 0x%08x", dut.H0_reg, dut.H1_reg, dut.H2_reg, dut.H3_reg); - $display("H4_reg = 0x%08x, H5_reg = 0x%08x, H6_reg = 0x%08x, H7_reg = 0x%08x", + $display("H4_reg = 0x%08x, H5_reg = 0x%08x, H6_reg = 0x%08x, H7_reg = 0x%08x", dut.H4_reg, dut.H5_reg, dut.H6_reg, dut.H7_reg); $display(""); - + $display("Control signals and counter:"); $display("sha256_ctrl_reg = 0x%02x", dut.sha256_ctrl_reg); - $display("digest_init = 0x%01x, digest_update = 0x%01x", + $display("digest_init = 0x%01x, digest_update = 0x%01x", dut.digest_init, dut.digest_update); - $display("state_init = 0x%01x, state_update = 0x%01x", + $display("state_init = 0x%01x, state_update = 0x%01x", dut.state_init, dut.state_update); - $display("first_block = 0x%01x, ready_flag = 0x%01x, w_init = 0x%01x", + $display("first_block = 0x%01x, ready_flag = 0x%01x, w_init = 0x%01x", dut.first_block, dut.ready_flag, dut.w_init); - $display("t_ctr_inc = 0x%01x, t_ctr_rst = 0x%01x, t_ctr_reg = 0x%02x", + $display("t_ctr_inc = 0x%01x, t_ctr_rst = 0x%01x, t_ctr_reg = 0x%02x", dut.t_ctr_inc, dut.t_ctr_rst, dut.t_ctr_reg); $display(""); $display("State registers:"); - $display("a_reg = 0x%08x, b_reg = 0x%08x, c_reg = 0x%08x, d_reg = 0x%08x", + $display("a_reg = 0x%08x, b_reg = 0x%08x, c_reg = 0x%08x, d_reg = 0x%08x", dut.a_reg, dut.b_reg, dut.c_reg, dut.d_reg); - $display("e_reg = 0x%08x, f_reg = 0x%08x, g_reg = 0x%08x, h_reg = 0x%08x", + $display("e_reg = 0x%08x, f_reg = 0x%08x, g_reg = 0x%08x, h_reg = 0x%08x", dut.e_reg, dut.f_reg, dut.g_reg, dut.h_reg); $display(""); - $display("a_new = 0x%08x, b_new = 0x%08x, c_new = 0x%08x, d_new = 0x%08x", + $display("a_new = 0x%08x, b_new = 0x%08x, c_new = 0x%08x, d_new = 0x%08x", dut.a_new, dut.b_new, dut.c_new, dut.d_new); - $display("e_new = 0x%08x, f_new = 0x%08x, g_new = 0x%08x, h_new = 0x%08x", + $display("e_new = 0x%08x, f_new = 0x%08x, g_new = 0x%08x, h_new = 0x%08x", dut.e_new, dut.f_new, dut.g_new, dut.h_new); $display(""); @@ -174,8 +193,8 @@ module tb_sha256_core(); $display(""); end endtask // dump_dut_state - - + + //---------------------------------------------------------------- // reset_dut() // @@ -190,7 +209,7 @@ module tb_sha256_core(); end endtask // reset_dut - + //---------------------------------------------------------------- // init_sim() // @@ -199,20 +218,29 @@ module tb_sha256_core(); //---------------------------------------------------------------- task init_sim(); begin - cycle_ctr = 0; - error_ctr = 0; - tc_ctr = 0; - - tb_clk = 0; - tb_reset_n = 1; + cycle_ctr = 0; + error_ctr = 0; + tc_ctr = 0; + + tb_clk = 0; + tb_reset_n = 1; - tb_init = 0; - tb_next = 0; - tb_block = 512'h00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000; + tb_init = 0; + tb_next = 0; + tb_block = 512'h0; + tb_state_wr_data = 32'h0; + tb_state0_we = 0; + tb_state1_we = 0; + tb_state2_we = 0; + tb_state3_we = 0; + tb_state4_we = 0; + tb_state5_we = 0; + tb_state6_we = 0; + tb_state7_we = 0; end endtask // init_dut - + //---------------------------------------------------------------- // display_test_result() // @@ -230,7 +258,7 @@ module tb_sha256_core(); end end endtask // display_test_result - + //---------------------------------------------------------------- // wait_ready() @@ -250,7 +278,7 @@ module tb_sha256_core(); end endtask // wait_ready - + //---------------------------------------------------------------- // single_block_test() // @@ -268,25 +296,25 @@ module tb_sha256_core(); #(CLK_PERIOD); wait_ready(); - + if (tb_digest == expected) begin $display("*** TC %0d successful.", tc_number); $display(""); - end + end else begin $display("*** ERROR: TC %0d NOT successful.", tc_number); $display("Expected: 0x%064x", expected); $display("Got: 0x%064x", tb_digest); $display(""); - + error_ctr = error_ctr + 1; end end endtask // single_block_test - + //---------------------------------------------------------------- // double_block_test() // @@ -313,19 +341,19 @@ module tb_sha256_core(); wait_ready(); db_digest1 = tb_digest; $display("*** TC %0d first block done.", tc_number); - + $display("*** TC %0d second block started.", tc_number); tb_block = block2; tb_next = 1; #(CLK_PERIOD); wait_ready(); $display("*** TC %0d second block done.", tc_number); - + if (db_digest1 == expected1) begin $display("*** TC %0d first block successful", tc_number); $display(""); - end + end else begin $display("*** ERROR: TC %0d first block NOT successful", tc_number); @@ -334,12 +362,12 @@ module tb_sha256_core(); $display(""); db_error = 1; end - + if (db_digest1 == expected1) begin $display("*** TC %0d second block successful", tc_number); $display(""); - end + end else begin $display("*** ERROR: TC %0d second block NOT successful", tc_number); @@ -354,12 +382,104 @@ module tb_sha256_core(); error_ctr = error_ctr + 1; end end - endtask // single_block_test - - + endtask // double_block_test + + + //---------------------------------------------------------------- + // state_restore_test() + // + // Run a test where the state for the first block is written + // to the core and then a second block is processed. The result + // should match the dual block test. + //---------------------------------------------------------------- + task state_restore_test(input [7 : 0] tc_number, + input [255 : 0] state, + input [511 : 0] block, + input [255 : 0] expected); + + reg [255 : 0] db_digest1; + reg db_error; + begin + $display("*** TC %0d state restore block test case started.", tc_number); + db_error = 0; + tc_ctr = tc_ctr + 1; + + $display("*** TC %0d Writing state to core.", tc_number); + + tb_state_wr_data = state[255 : 224]; + tb_state0_we = 1; + #(CLK_PERIOD); + tb_state0_we = 0; + + tb_state_wr_data = state[223 : 192]; + tb_state1_we = 1; + #(CLK_PERIOD); + tb_state1_we = 0; + + tb_state_wr_data = state[191 : 160]; + tb_state2_we = 1; + #(CLK_PERIOD); + tb_state2_we = 0; + + tb_state_wr_data = state[159 : 128]; + tb_state3_we = 1; + #(CLK_PERIOD); + tb_state3_we = 0; + + tb_state_wr_data = state[127 : 096]; + tb_state4_we = 1; + #(CLK_PERIOD); + tb_state4_we = 0; + + tb_state_wr_data = state[095 : 0064]; + tb_state5_we = 1; + #(CLK_PERIOD); + tb_state5_we = 0; + + tb_state_wr_data = state[063 : 0032]; + tb_state6_we = 1; + #(CLK_PERIOD); + tb_state6_we = 0; + + tb_state_wr_data = state[031 : 000]; + tb_state7_we = 1; + #(CLK_PERIOD); + tb_state7_we = 0; + + #(CLK_PERIOD); + + $display("*** TC %0d block started.", tc_number); + tb_block = block; + tb_next = 1; + #(CLK_PERIOD); + wait_ready(); + $display("*** TC %0d block done.", tc_number); + + if (db_digest1 == expected) + begin + $display("*** TC %0d block successful", tc_number); + $display(""); + end + else + begin + $display("*** ERROR: TC %0d block NOT successful", tc_number); + $display("Expected: 0x%064x", expected); + $display("Got: 0x%064x", tb_digest); + $display(""); + db_error = 1; + end + + if (db_error) + begin + error_ctr = error_ctr + 1; + end + end + endtask // state_restore_test + + //---------------------------------------------------------------- // sha256_core_test - // The main test functionality. + // The main test functionality. // // Test cases taken from: // http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA256.pdf @@ -373,14 +493,18 @@ module tb_sha256_core(); reg [255 : 0] res2_1; reg [511 : 0] tc2_2; reg [255 : 0] res2_2; - + + reg [255 : 0] tc3_state; + reg [511 : 0] tc3_block; + reg [255 : 0] tc3_res; + $display(" -- Testbench for sha256 core started --"); init_sim(); dump_dut_state(); reset_dut(); dump_dut_state(); - + // TC1: Single block message: "abc". tc1 = 512'h61626380000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018; res1 = 256'hBA7816BF8F01CFEA414140DE5DAE2223B00361A396177A9CB410FF61F20015AD; @@ -390,11 +514,16 @@ module tb_sha256_core(); // "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" tc2_1 = 512'h6162636462636465636465666465666765666768666768696768696A68696A6B696A6B6C6A6B6C6D6B6C6D6E6C6D6E6F6D6E6F706E6F70718000000000000000; res2_1 = 256'h85E655D6417A17953363376A624CDE5C76E09589CAC5F811CC4B32C1F20E533A; - + tc2_2 = 512'h000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001C0; res2_2 = 256'h248D6A61D20638B8E5C026930C3E6039A33CE45964FF2167F6ECEDD419DB06C1; double_block_test(2, tc2_1, res2_1, tc2_2, res2_2); - + + tc3_state = 256'h85E655D6417A17953363376A624CDE5C76E09589CAC5F811CC4B32C1F20E533A; + tc3_block = 512'h000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001C0; + tc3_res = 256'h248D6A61D20638B8E5C026930C3E6039A33CE45964FF2167F6ECEDD419DB06C1; + state_restore_test(3, tc3_state, tc3_block, tc3_res); + display_test_result(); $display("*** Simulation done."); $finish; |