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-rw-r--r--src/tb/tb_wb_sha256.v556
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diff --git a/src/tb/tb_wb_sha256.v b/src/tb/tb_wb_sha256.v
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-//======================================================================
-//
-// tb_wb_sha256.v
-// --------------
-// Testbench for the SHA-256 top level Wishbone wrapper.
-//
-//
-// Author: Joachim Strombergson
-// Copyright (c) 2014, SUNET
-//
-// 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
-// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-//======================================================================
-
-//------------------------------------------------------------------
-// Simulator directives.
-//------------------------------------------------------------------
-`timescale 1ns/10ps
-
-
-//------------------------------------------------------------------
-// Test module.
-//------------------------------------------------------------------
-module tb_wb_sha256();
-
- //----------------------------------------------------------------
- // Internal constant and parameter definitions.
- //----------------------------------------------------------------
- parameter DEBUG = 0;
-
- parameter CLK_HALF_PERIOD = 2;
-
- // The address map.
- parameter ADDR_NAME0 = 8'h00;
- parameter ADDR_NAME1 = 8'h01;
- parameter ADDR_VERSION = 8'h02;
-
- parameter ADDR_CTRL = 8'h08;
- parameter CTRL_INIT_BIT = 0;
- parameter CTRL_INIT_VALUE = 8'h01;
- parameter CTRL_NEXT_BIT = 1;
- parameter CTRL_NEXT_VALUE = 8'h02;
-
- 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;
- parameter ADDR_BLOCK3 = 8'h13;
- parameter ADDR_BLOCK4 = 8'h14;
- parameter ADDR_BLOCK5 = 8'h15;
- parameter ADDR_BLOCK6 = 8'h16;
- parameter ADDR_BLOCK7 = 8'h17;
- parameter ADDR_BLOCK8 = 8'h18;
- parameter ADDR_BLOCK9 = 8'h19;
- parameter ADDR_BLOCK10 = 8'h1a;
- parameter ADDR_BLOCK11 = 8'h1b;
- parameter ADDR_BLOCK12 = 8'h1c;
- 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;
- parameter ADDR_DIGEST3 = 8'h23;
- parameter ADDR_DIGEST4 = 8'h24;
- parameter ADDR_DIGEST5 = 8'h25;
- parameter ADDR_DIGEST6 = 8'h26;
- parameter ADDR_DIGEST7 = 8'h27;
-
-
- //----------------------------------------------------------------
- // Register and Wire declarations.
- //----------------------------------------------------------------
- reg [31 : 0] cycle_ctr;
- reg [31 : 0] error_ctr;
- reg [31 : 0] tc_ctr;
-
- reg tb_clk;
- reg tb_reset;
- reg tb_cs;
- reg tb_write_read;
- reg [7 : 0] tb_address;
- reg [31 : 0] tb_data_in;
- wire [31 : 0] tb_data_out;
-
- reg [31 : 0] read_data;
- reg [255 : 0] digest_data;
-
-
- //----------------------------------------------------------------
- // Device Under Test.
- //----------------------------------------------------------------
- wb_sha256 dut(
- .CLK_I(tb_clk),
- .RST_I(tb_reset),
-
- .STB_I(tb_cs),
- .WE_I(tb_write_read),
- .ACK_O(tb_ack),
- .ERR_O(tb_err),
-
- .ADR_I(tb_address),
- .DAT_I(tb_data_in),
- .DAT_O(tb_data_out)
- );
-
-
- //----------------------------------------------------------------
- // clk_gen
- //
- // Clock generator process.
- //----------------------------------------------------------------
- always
- begin : clk_gen
- #CLK_HALF_PERIOD tb_clk = !tb_clk;
- end // clk_gen
-
-
- //----------------------------------------------------------------
- // sys_monitor
- //
- // Generates a cycle counter and displays information about
- // the dut as needed.
- //----------------------------------------------------------------
- always
- begin : sys_monitor
- #(2 * CLK_HALF_PERIOD);
- cycle_ctr = cycle_ctr + 1;
- end
-
-
- //----------------------------------------------------------------
- // dump_dut_state()
- //
- // Dump the state of the dump when needed.
- //----------------------------------------------------------------
- task dump_dut_state();
- begin
- $display("State of DUT");
- $display("------------");
- $display("Inputs and outputs:");
- $display("STB_I = 0x%01x, WE_I = 0x%01x",
- dut.STB_I, dut.WE_I);
- $display("ADR_I = 0x%02x", dut.ADR_I);
- $display("DAT_I = 0x%08x, DAT_O = 0x%08x",
- dut.DAT_I, dut.DAT_O);
- $display("tmp_data_out = 0x%08x", dut.tmp_data_out);
- $display("");
-
- $display("Control and status:");
- $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);
- $display("block4 = 0x%08x, block5 = 0x%08x, block6 = 0x%08x, block7 = 0x%08x",
- dut.block4_reg, dut.block5_reg, dut.block6_reg, dut.block7_reg);
-
- $display("block8 = 0x%08x, block9 = 0x%08x, block10 = 0x%08x, block11 = 0x%08x",
- dut.block8_reg, dut.block9_reg, dut.block10_reg, dut.block11_reg);
- $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
-
-
- //----------------------------------------------------------------
- // reset_dut()
- //
- // Toggles reset to force the DUT into a well defined state.
- //----------------------------------------------------------------
- task reset_dut();
- begin
- $display("*** Toggle reset.");
- tb_reset = 1;
- #(4 * CLK_HALF_PERIOD);
- tb_reset = 0;
- end
- endtask // reset_dut
-
-
- //----------------------------------------------------------------
- // init_sim()
- //
- // Initialize all counters and testbed functionality as well
- // as setting the DUT inputs to defined values.
- //----------------------------------------------------------------
- task init_sim();
- begin
- cycle_ctr = 32'h00000000;
- error_ctr = 32'h00000000;
- tc_ctr = 32'h00000000;
-
- tb_clk = 0;
- tb_reset = 0;
- tb_cs = 0;
- tb_write_read = 0;
- tb_address = 6'h00;
- tb_data_in = 32'h00000000;
- end
- endtask // init_dut
-
-
- //----------------------------------------------------------------
- // display_test_result()
- //
- // Display the accumulated test results.
- //----------------------------------------------------------------
- task display_test_result();
- begin
- if (error_ctr == 0)
- begin
- $display("*** All %02d test cases completed successfully.", tc_ctr);
- end
- else
- begin
- $display("*** %02d test cases completed.", tc_ctr);
- $display("*** %02d errors detected during testing.", error_ctr);
- end
- end
- endtask // display_test_result
-
-
- //----------------------------------------------------------------
- // wait_ready()
- //
- // Wait for the ready flag in the dut to be set.
- // (Actually we wait for either ready or valid to be set.)
- //
- // Note: It is the callers responsibility to call the function
- // when the dut is actively processing and will in fact at some
- // point set the flag.
- //----------------------------------------------------------------
- task wait_ready();
- begin
- read_data = 0;
-
- while (read_data == 0)
- begin
- read_word(ADDR_STATUS);
- end
- end
- endtask // wait_ready
-
-
- //----------------------------------------------------------------
- // write_word()
- //
- // Write the given word to the DUT using the DUT interface.
- //----------------------------------------------------------------
- task write_word(input [7 : 0] address,
- input [31 : 0] word);
- begin
- if (DEBUG)
- begin
- $display("*** Writing 0x%08x to 0x%02x.", word, address);
- $display("");
- end
-
- tb_address = address;
- tb_data_in = word;
- tb_cs = 1;
- tb_write_read = 1;
- #(2 * CLK_HALF_PERIOD);
- tb_cs = 0;
- tb_write_read = 0;
- end
- endtask // write_word
-
-
- //----------------------------------------------------------------
- // write_block()
- //
- // Write the given block to the dut.
- //----------------------------------------------------------------
- task write_block(input [511 : 0] block);
- begin
- write_word(ADDR_BLOCK0, block[511 : 480]);
- write_word(ADDR_BLOCK1, block[479 : 448]);
- write_word(ADDR_BLOCK2, block[447 : 416]);
- write_word(ADDR_BLOCK3, block[415 : 384]);
- write_word(ADDR_BLOCK4, block[383 : 352]);
- write_word(ADDR_BLOCK5, block[351 : 320]);
- write_word(ADDR_BLOCK6, block[319 : 288]);
- write_word(ADDR_BLOCK7, block[287 : 256]);
- write_word(ADDR_BLOCK8, block[255 : 224]);
- write_word(ADDR_BLOCK9, block[223 : 192]);
- write_word(ADDR_BLOCK10, block[191 : 160]);
- write_word(ADDR_BLOCK11, block[159 : 128]);
- write_word(ADDR_BLOCK12, block[127 : 96]);
- write_word(ADDR_BLOCK13, block[95 : 64]);
- write_word(ADDR_BLOCK14, block[63 : 32]);
- write_word(ADDR_BLOCK15, block[31 : 0]);
- end
- endtask // write_block
-
-
- //----------------------------------------------------------------
- // read_word()
- //
- // Read a data word from the given address in the DUT.
- // the word read will be available in the global variable
- // read_data.
- //----------------------------------------------------------------
- task read_word(input [7 : 0] address);
- begin
- tb_address = address;
- tb_cs = 1;
- tb_write_read = 0;
- #(2 * CLK_HALF_PERIOD);
- read_data = tb_data_out;
- tb_cs = 0;
-
- if (DEBUG)
- begin
- $display("*** Reading 0x%08x from 0x%02x.", read_data, address);
- $display("");
- end
- end
- endtask // read_word
-
-
- //----------------------------------------------------------------
- // check_name_version()
- //
- // Read the name and version from the DUT.
- //----------------------------------------------------------------
- task check_name_version();
- reg [31 : 0] name0;
- reg [31 : 0] name1;
- reg [31 : 0] version;
- begin
-
- read_word(ADDR_NAME0);
- name0 = read_data;
- read_word(ADDR_NAME1);
- name1 = read_data;
- read_word(ADDR_VERSION);
- version = read_data;
-
- $display("DUT name: %c%c%c%c%c%c%c%c",
- name0[31 : 24], name0[23 : 16], name0[15 : 8], name0[7 : 0],
- name1[31 : 24], name1[23 : 16], name1[15 : 8], name1[7 : 0]);
- $display("DUT version: %c%c%c%c",
- version[31 : 24], version[23 : 16], version[15 : 8], version[7 : 0]);
- end
- endtask // check_name_version
-
-
- //----------------------------------------------------------------
- // read_digest()
- //
- // Read the digest in the dut. The resulting digest will be
- // available in the global variable digest_data.
- //----------------------------------------------------------------
- task read_digest();
- begin
- read_word(ADDR_DIGEST0);
- digest_data[255 : 224] = read_data;
- read_word(ADDR_DIGEST1);
- digest_data[223 : 192] = read_data;
- read_word(ADDR_DIGEST2);
- digest_data[191 : 160] = read_data;
- read_word(ADDR_DIGEST3);
- digest_data[159 : 128] = read_data;
- read_word(ADDR_DIGEST4);
- digest_data[127 : 96] = read_data;
- read_word(ADDR_DIGEST5);
- digest_data[95 : 64] = read_data;
- read_word(ADDR_DIGEST6);
- digest_data[63 : 32] = read_data;
- read_word(ADDR_DIGEST7);
- digest_data[31 : 0] = read_data;
- end
- endtask // read_digest
-
-
- //----------------------------------------------------------------
- // single_block_test()
- //
- //
- // Perform test of a single block digest.
- //----------------------------------------------------------------
- task single_block_test([511 : 0] block,
- [255 : 0] expected);
- begin
- $display("*** TC%01d - Single block test started.", tc_ctr);
-
- write_block(block);
- write_word(ADDR_CTRL, CTRL_INIT_VALUE);
- write_word(ADDR_CTRL, 8'h00);
- wait_ready();
- read_digest();
-
- if (digest_data == expected)
- begin
- $display("TC%01d: OK.", tc_ctr);
- end
- else
- begin
- $display("TC%01d: ERROR.", 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 - Single block test done.", tc_ctr);
- tc_ctr = tc_ctr + 1;
- end
- endtask // single_block_test
-
-
- //----------------------------------------------------------------
- // double_block_test()
- //
- //
- // Perform test of a double block digest. Note that we check
- // the digests for both the first and final block.
- //----------------------------------------------------------------
- task double_block_test([511 : 0] block0,
- [255 : 0] expected0,
- [511 : 0] block1,
- [255 : 0] expected1
- );
- begin
- $display("*** TC%01d - Double block test started.", tc_ctr);
-
- // First block
- write_block(block0);
- write_word(ADDR_CTRL, CTRL_INIT_VALUE);
- write_word(ADDR_CTRL, 8'h00);
- wait_ready();
- read_digest();
-
- if (digest_data == expected0)
- begin
- $display("TC%01d first block: OK.", tc_ctr);
- end
- else
- begin
- $display("TC%01d: ERROR in first digest", tc_ctr);
- $display("TC%01d: Expected: 0x%064x", tc_ctr, expected0);
- $display("TC%01d: Got: 0x%064x", tc_ctr, digest_data);
- error_ctr = error_ctr + 1;
- end
-
- // Final block
- write_block(block1);
- write_word(ADDR_CTRL, CTRL_NEXT_VALUE);
- write_word(ADDR_CTRL, 8'h00);
- wait_ready();
- read_digest();
-
- if (digest_data == expected1)
- begin
- $display("TC%01d final block: OK.", tc_ctr);
- end
- else
- begin
- $display("TC%01d: ERROR in final digest", tc_ctr);
- $display("TC%01d: Expected: 0x%064x", tc_ctr, expected1);
- $display("TC%01d: Got: 0x%064x", tc_ctr, digest_data);
- error_ctr = error_ctr + 1;
- end
-
- $display("*** TC%01d - Double block test done.", tc_ctr);
- tc_ctr = tc_ctr + 1;
- end
- endtask // double_block_test
-
-
- //----------------------------------------------------------------
- // wb_sha256_test
- //
- // The main test functionality.
- //
- // Test cases taken from:
- // http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA256.pdf
- //----------------------------------------------------------------
- initial
- begin : wb_sha256_test
- reg [511 : 0] tc0;
- reg [255 : 0] res0;
-
- reg [511 : 0] tc1_0;
- reg [255 : 0] res1_0;
- reg [511 : 0] tc1_1;
- reg [255 : 0] res1_1;
-
- $display(" -- Testbench for wb_sha256 started --");
-
- init_sim();
- reset_dut();
- check_name_version();
-
- // dump_dut_state();
- // write_word(ADDR_BLOCK0, 32'hdeadbeef);
- // dump_dut_state();
- // read_word(ADDR_BLOCK0);
- // dump_dut_state();
-
- tc0 = 512'h61626380000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000018;
- res0 = 256'hBA7816BF8F01CFEA414140DE5DAE2223B00361A396177A9CB410FF61F20015AD;
- single_block_test(tc0, res0);
-
- tc1_0 = 512'h6162636462636465636465666465666765666768666768696768696A68696A6B696A6B6C6A6B6C6D6B6C6D6E6C6D6E6F6D6E6F706E6F70718000000000000000;
- res1_0 = 256'h85E655D6417A17953363376A624CDE5C76E09589CAC5F811CC4B32C1F20E533A;
- tc1_1 = 512'h000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001C0;
- res1_1 = 256'h248D6A61D20638B8E5C026930C3E6039A33CE45964FF2167F6ECEDD419DB06C1;
- double_block_test(tc1_0, res1_0, tc1_1, res1_1);
-
- display_test_result();
-
- $display(" -- Testbench for wb_sha256 done. --");
- $finish;
- end // wb_sha256_test
-endmodule // tb_wb_sha256
-
-//======================================================================
-// EOF tb_wb_sha256.v
-//======================================================================
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