diff options
| -rw-r--r-- | src/tb/tb_sha256.v | 220 |
1 files changed, 148 insertions, 72 deletions
diff --git a/src/tb/tb_sha256.v b/src/tb/tb_sha256.v index 72e7d21..b6916cd 100644 --- a/src/tb/tb_sha256.v +++ b/src/tb/tb_sha256.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(); - + //---------------------------------------------------------------- // Internal constant and parameter definitions. //---------------------------------------------------------------- @@ -67,7 +67,7 @@ module tb_sha256(); parameter ADDR_STATUS = 8'h09; parameter STATUS_READY_BIT = 0; parameter STATUS_VALID_BIT = 1; - + parameter ADDR_BLOCK0 = 8'h10; parameter ADDR_BLOCK1 = 8'h11; parameter ADDR_BLOCK2 = 8'h12; @@ -84,7 +84,7 @@ module tb_sha256(); parameter ADDR_BLOCK13 = 8'h1d; parameter ADDR_BLOCK14 = 8'h1e; parameter ADDR_BLOCK15 = 8'h1f; - + parameter ADDR_DIGEST0 = 8'h20; parameter ADDR_DIGEST1 = 8'h21; parameter ADDR_DIGEST2 = 8'h22; @@ -94,7 +94,16 @@ module tb_sha256(); parameter ADDR_DIGEST6 = 8'h26; parameter ADDR_DIGEST7 = 8'h27; - + parameter ADDR_STATE0 = 8'h30; + parameter ADDR_STATE1 = 8'h31; + parameter ADDR_STATE2 = 8'h32; + parameter ADDR_STATE3 = 8'h33; + parameter ADDR_STATE4 = 8'h34; + parameter ADDR_STATE5 = 8'h35; + parameter ADDR_STATE6 = 8'h36; + parameter ADDR_STATE7 = 8'h37; + + //---------------------------------------------------------------- // Register and Wire declarations. //---------------------------------------------------------------- @@ -113,36 +122,36 @@ module tb_sha256(); reg [31 : 0] read_data; reg [255 : 0] digest_data; - - + + //---------------------------------------------------------------- // Device Under Test. //---------------------------------------------------------------- sha256 dut( .clk(tb_clk), .reset_n(tb_reset_n), - + .cs(tb_cs), .we(tb_we), - - + + .address(tb_address), .write_data(tb_write_data), .read_data(tb_read_data), .error(tb_error) ); - + //---------------------------------------------------------------- // clk_gen // - // Clock generator process. + // Clock generator process. //---------------------------------------------------------------- - always + always begin : clk_gen #CLK_HALF_PERIOD tb_clk = !tb_clk; end // clk_gen - + //---------------------------------------------------------------- // sys_monitor @@ -156,7 +165,7 @@ module tb_sha256(); cycle_ctr = cycle_ctr + 1; end - + //---------------------------------------------------------------- // dump_dut_state() // @@ -167,20 +176,20 @@ module tb_sha256(); $display("State of DUT"); $display("------------"); $display("Inputs and outputs:"); - $display("cs = 0x%01x, we = 0x%01x", + $display("cs = 0x%01x, we = 0x%01x", dut.cs, dut.we); $display("address = 0x%02x", dut.address); - $display("write_data = 0x%08x, read_data = 0x%08x", + $display("write_data = 0x%08x, read_data = 0x%08x", dut.write_data, dut.read_data); $display("tmp_read_data = 0x%08x", dut.tmp_read_data); $display(""); $display("Control and status:"); - $display("ctrl = 0x%02x, status = 0x%02x", - {dut.next_reg, dut.init_reg}, + $display("ctrl = 0x%02x, status = 0x%02x", + {dut.next_reg, dut.init_reg}, {dut.digest_valid_reg, dut.ready_reg}); $display(""); - + $display("Message block:"); $display("block0 = 0x%08x, block1 = 0x%08x, block2 = 0x%08x, block3 = 0x%08x", dut.block0_reg, dut.block1_reg, dut.block2_reg, dut.block3_reg); @@ -192,15 +201,31 @@ module tb_sha256(); $display("block12 = 0x%08x, block13 = 0x%08x, block14 = 0x%08x, block15 = 0x%08x", dut.block12_reg, dut.block13_reg, dut.block14_reg, dut.block15_reg); $display(""); - + $display("Digest:"); $display("digest = 0x%064x", dut.digest_reg); $display(""); - + end endtask // dump_dut_state - - + + + //---------------------------------------------------------------- + // dump_H_state() + // + // Dump the state of the H registers when needed. + //---------------------------------------------------------------- + task dump_H_state(); + begin + $display("H0_reg = 0x%08x, H1_reg = 0x%08x, H2_reg = 0x%08x, H3_reg = 0x%08x", + dut.core.H0_reg, dut.core.H1_reg, dut.core.H2_reg, dut.core.H3_reg); + $display("H4_reg = 0x%08x, H5_reg = 0x%08x, H6_reg = 0x%08x, H7_reg = 0x%08x", + dut.core.H4_reg, dut.core.H5_reg, dut.core.H6_reg, dut.core.H7_reg); + $display(""); + end + endtask // dump_H_state + + //---------------------------------------------------------------- // reset_dut() // @@ -215,7 +240,7 @@ module tb_sha256(); end endtask // reset_dut - + //---------------------------------------------------------------- // init_sim() // @@ -227,7 +252,7 @@ module tb_sha256(); cycle_ctr = 32'h00000000; error_ctr = 32'h00000000; tc_ctr = 32'h00000000; - + tb_clk = 0; tb_reset_n = 0; tb_cs = 0; @@ -237,7 +262,7 @@ module tb_sha256(); end endtask // init_dut - + //---------------------------------------------------------------- // display_test_result() // @@ -256,8 +281,8 @@ module tb_sha256(); end end endtask // display_test_result - - + + //---------------------------------------------------------------- // wait_ready() // @@ -271,14 +296,14 @@ module tb_sha256(); task wait_ready(); begin read_data = 0; - + while (read_data == 0) begin read_word(ADDR_STATUS); end end endtask // wait_ready - + //---------------------------------------------------------------- // write_word() @@ -293,7 +318,7 @@ module tb_sha256(); $display("*** Writing 0x%08x to 0x%02x.", word, address); $display(""); end - + tb_address = address; tb_write_data = word; tb_cs = 1; @@ -330,7 +355,7 @@ module tb_sha256(); write_word(ADDR_BLOCK15, block[31 : 0]); end endtask // write_block - + //---------------------------------------------------------------- // read_word() @@ -356,7 +381,7 @@ module tb_sha256(); end endtask // read_word - + //---------------------------------------------------------------- // check_name_version() // @@ -382,7 +407,7 @@ module tb_sha256(); version[31 : 24], version[23 : 16], version[15 : 8], version[7 : 0]); end endtask // check_name_version - + //---------------------------------------------------------------- // read_digest() @@ -410,8 +435,8 @@ module tb_sha256(); digest_data[31 : 0] = read_data; end endtask // read_digest - - + + //---------------------------------------------------------------- // single_block_test() // @@ -421,8 +446,8 @@ module tb_sha256(); task single_block_test(input [511 : 0] block, input [255 : 0] expected); begin - $display("*** TC%01d - Single block test started.", tc_ctr); - + $display("*** TC%01d - Single block test started.", tc_ctr); + write_block(block); write_word(ADDR_CTRL, CTRL_INIT_VALUE); #(CLK_PERIOD); @@ -440,12 +465,12 @@ module tb_sha256(); $display("TC%01d: Got: 0x%064x", tc_ctr, digest_data); error_ctr = error_ctr + 1; end - $display("*** TC%01d - Single block test done.", tc_ctr); + $display("*** TC%01d - Single block test done.", tc_ctr); tc_ctr = tc_ctr + 1; end endtask // single_block_test - - + + //---------------------------------------------------------------- // double_block_test() // @@ -459,7 +484,7 @@ module tb_sha256(); input [255 : 0] expected1 ); begin - $display("*** TC%01d - Double block test started.", tc_ctr); + $display("*** TC%01d - Double block test started.", tc_ctr); // First block write_block(block0); @@ -486,7 +511,7 @@ module tb_sha256(); #(CLK_PERIOD); wait_ready(); read_digest(); - + if (digest_data == expected1) begin $display("TC%01d final block: OK.", tc_ctr); @@ -499,15 +524,64 @@ module tb_sha256(); error_ctr = error_ctr + 1; end - $display("*** TC%01d - Double block test done.", tc_ctr); + $display("*** TC%01d - Double block test done.", tc_ctr); tc_ctr = tc_ctr + 1; end endtask // double_block_test - + + //---------------------------------------------------------------- + // restore_state_test() + // + // + // Perform test of a double block digest. Note that we check + // the digests for both the first and final block. + //---------------------------------------------------------------- + task restore_state_test(input [255 : 0] state, + input [511 : 0] block, + input [255 : 0] expected + ); + begin + $display("*** TC%01d - Restore state test started.", tc_ctr); + + // Write state. + write_word(ADDR_STATE0, state[255 : 224]); + write_word(ADDR_STATE1, state[223 : 192]); + write_word(ADDR_STATE2, state[191 : 160]); + write_word(ADDR_STATE3, state[159 : 128]); + write_word(ADDR_STATE4, state[127 : 096]); + write_word(ADDR_STATE5, state[095 : 0064]); + write_word(ADDR_STATE6, state[063 : 0032]); + write_word(ADDR_STATE7, state[031 : 000]); + + // Process block. + write_block(block); + write_word(ADDR_CTRL, CTRL_NEXT_VALUE); + #(CLK_PERIOD); + wait_ready(); + read_digest(); + + if (digest_data == expected) + begin + $display("TC%01d final digest: OK.", tc_ctr); + end + else + begin + $display("TC%01d: ERROR in final digest", tc_ctr); + $display("TC%01d: Expected: 0x%064x", tc_ctr, expected); + $display("TC%01d: Got: 0x%064x", tc_ctr, digest_data); + error_ctr = error_ctr + 1; + end + + $display("*** TC%01d - Restore state test done.", tc_ctr); + tc_ctr = tc_ctr + 1; + end + endtask // restore_state_test + + //---------------------------------------------------------------- // sha256_test - // The main test functionality. + // The main test functionality. // // Test cases taken from: // http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA256.pdf @@ -521,7 +595,7 @@ module tb_sha256(); reg [255 : 0] res1_0; reg [511 : 0] tc1_1; reg [255 : 0] res1_1; - + $display(" -- Testbench for sha256 started --"); init_sim(); @@ -543,9 +617,11 @@ module tb_sha256(); tc1_1 = 512'h000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001C0; res1_1 = 256'h248D6A61D20638B8E5C026930C3E6039A33CE45964FF2167F6ECEDD419DB06C1; double_block_test(tc1_0, res1_0, tc1_1, res1_1); - + + restore_state_test(res1_0, tc1_1, res1_1); + display_test_result(); - + $display(" -- Testbench for sha256 done. --"); $finish; end // sha256_test |