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-rw-r--r--src/rtl/sha256.v115
-rw-r--r--src/tb/tb_sha256.v49
2 files changed, 83 insertions, 81 deletions
diff --git a/src/rtl/sha256.v b/src/rtl/sha256.v
index 8f7f7b6..06ebd3d 100644
--- a/src/rtl/sha256.v
+++ b/src/rtl/sha256.v
@@ -7,7 +7,8 @@
//
//
// Author: Joachim Strombergson
-// Copyright (c) 2014 SUNET
+// 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
@@ -43,12 +44,12 @@ module sha256(
// Control.
input wire cs,
- input wire write_read,
+ input wire we,
// Data ports.
input wire [7 : 0] address,
- input wire [31 : 0] data_in,
- output wire [31 : 0] data_out,
+ input wire [31 : 0] write_data,
+ output wire [31 : 0] read_data,
output wire error
);
@@ -155,7 +156,7 @@ module sha256(
wire [255 : 0] core_digest;
wire core_digest_valid;
- reg [31 : 0] tmp_data_out;
+ reg [31 : 0] tmp_read_data;
reg tmp_error;
@@ -171,8 +172,8 @@ module sha256(
block8_reg, block9_reg, block10_reg, block11_reg,
block12_reg, block13_reg, block14_reg, block15_reg};
- assign data_out = tmp_data_out;
- assign error = tmp_error;
+ assign read_data = tmp_read_data;
+ assign error = tmp_error;
//----------------------------------------------------------------
@@ -234,8 +235,8 @@ module sha256(
if (ctrl_we)
begin
- init_reg <= data_in[CTRL_INIT_BIT];
- next_reg <= data_in[CTRL_NEXT_BIT];
+ init_reg <= write_data[CTRL_INIT_BIT];
+ next_reg <= write_data[CTRL_NEXT_BIT];
end
if (core_digest_valid)
@@ -245,82 +246,82 @@ module sha256(
if (block0_we)
begin
- block0_reg <= data_in;
+ block0_reg <= write_data;
end
if (block1_we)
begin
- block1_reg <= data_in;
+ block1_reg <= write_data;
end
if (block2_we)
begin
- block2_reg <= data_in;
+ block2_reg <= write_data;
end
if (block3_we)
begin
- block3_reg <= data_in;
+ block3_reg <= write_data;
end
if (block4_we)
begin
- block4_reg <= data_in;
+ block4_reg <= write_data;
end
if (block5_we)
begin
- block5_reg <= data_in;
+ block5_reg <= write_data;
end
if (block6_we)
begin
- block6_reg <= data_in;
+ block6_reg <= write_data;
end
if (block7_we)
begin
- block7_reg <= data_in;
+ block7_reg <= write_data;
end
if (block8_we)
begin
- block8_reg <= data_in;
+ block8_reg <= write_data;
end
if (block9_we)
begin
- block9_reg <= data_in;
+ block9_reg <= write_data;
end
if (block10_we)
begin
- block10_reg <= data_in;
+ block10_reg <= write_data;
end
if (block11_we)
begin
- block11_reg <= data_in;
+ block11_reg <= write_data;
end
if (block12_we)
begin
- block12_reg <= data_in;
+ block12_reg <= write_data;
end
if (block13_we)
begin
- block13_reg <= data_in;
+ block13_reg <= write_data;
end
if (block14_we)
begin
- block14_reg <= data_in;
+ block14_reg <= write_data;
end
if (block15_we)
begin
- block15_reg <= data_in;
+ block15_reg <= write_data;
end
end
@@ -352,12 +353,12 @@ module sha256(
block13_we = 0;
block14_we = 0;
block15_we = 0;
- tmp_data_out = 32'h00000000;
+ tmp_read_data = 32'h00000000;
tmp_error = 0;
if (cs)
begin
- if (write_read)
+ if (we)
begin
case (address)
// Write operations.
@@ -451,7 +452,7 @@ module sha256(
tmp_error = 1;
end
endcase // case (address)
- end // if (write_read)
+ end // if (we)
else
begin
@@ -459,147 +460,147 @@ module sha256(
// Read operations.
ADDR_NAME0:
begin
- tmp_data_out = CORE_NAME0;
+ tmp_read_data = CORE_NAME0;
end
ADDR_NAME1:
begin
- tmp_data_out = CORE_NAME1;
+ tmp_read_data = CORE_NAME1;
end
ADDR_VERSION:
begin
- tmp_data_out = CORE_VERSION;
+ tmp_read_data = CORE_VERSION;
end
ADDR_CTRL:
begin
- tmp_data_out = {28'h0000000, 2'b00, next_reg, init_reg};
+ tmp_read_data = {28'h0000000, 2'b00, next_reg, init_reg};
end
ADDR_STATUS:
begin
- tmp_data_out = {28'h0000000, 2'b00, digest_valid_reg, ready_reg};
+ tmp_read_data = {28'h0000000, 2'b00, digest_valid_reg, ready_reg};
end
ADDR_BLOCK0:
begin
- tmp_data_out = block0_reg;
+ tmp_read_data = block0_reg;
end
ADDR_BLOCK1:
begin
- tmp_data_out = block1_reg;
+ tmp_read_data = block1_reg;
end
ADDR_BLOCK2:
begin
- tmp_data_out = block2_reg;
+ tmp_read_data = block2_reg;
end
ADDR_BLOCK3:
begin
- tmp_data_out = block3_reg;
+ tmp_read_data = block3_reg;
end
ADDR_BLOCK4:
begin
- tmp_data_out = block4_reg;
+ tmp_read_data = block4_reg;
end
ADDR_BLOCK5:
begin
- tmp_data_out = block5_reg;
+ tmp_read_data = block5_reg;
end
ADDR_BLOCK6:
begin
- tmp_data_out = block6_reg;
+ tmp_read_data = block6_reg;
end
ADDR_BLOCK7:
begin
- tmp_data_out = block7_reg;
+ tmp_read_data = block7_reg;
end
ADDR_BLOCK8:
begin
- tmp_data_out = block8_reg;
+ tmp_read_data = block8_reg;
end
ADDR_BLOCK9:
begin
- tmp_data_out = block9_reg;
+ tmp_read_data = block9_reg;
end
ADDR_BLOCK10:
begin
- tmp_data_out = block10_reg;
+ tmp_read_data = block10_reg;
end
ADDR_BLOCK11:
begin
- tmp_data_out = block11_reg;
+ tmp_read_data = block11_reg;
end
ADDR_BLOCK12:
begin
- tmp_data_out = block12_reg;
+ tmp_read_data = block12_reg;
end
ADDR_BLOCK13:
begin
- tmp_data_out = block13_reg;
+ tmp_read_data = block13_reg;
end
ADDR_BLOCK14:
begin
- tmp_data_out = block14_reg;
+ tmp_read_data = block14_reg;
end
ADDR_BLOCK15:
begin
- tmp_data_out = block15_reg;
+ tmp_read_data = block15_reg;
end
ADDR_DIGEST0:
begin
- tmp_data_out = digest_reg[255 : 224];
+ tmp_read_data = digest_reg[255 : 224];
end
ADDR_DIGEST1:
begin
- tmp_data_out = digest_reg[223 : 192];
+ tmp_read_data = digest_reg[223 : 192];
end
ADDR_DIGEST2:
begin
- tmp_data_out = digest_reg[191 : 160];
+ tmp_read_data = digest_reg[191 : 160];
end
ADDR_DIGEST3:
begin
- tmp_data_out = digest_reg[159 : 128];
+ tmp_read_data = digest_reg[159 : 128];
end
ADDR_DIGEST4:
begin
- tmp_data_out = digest_reg[127 : 96];
+ tmp_read_data = digest_reg[127 : 96];
end
ADDR_DIGEST5:
begin
- tmp_data_out = digest_reg[95 : 64];
+ tmp_read_data = digest_reg[95 : 64];
end
ADDR_DIGEST6:
begin
- tmp_data_out = digest_reg[63 : 32];
+ tmp_read_data = digest_reg[63 : 32];
end
ADDR_DIGEST7:
begin
- tmp_data_out = digest_reg[31 : 0];
+ tmp_read_data = digest_reg[31 : 0];
end
default:
diff --git a/src/tb/tb_sha256.v b/src/tb/tb_sha256.v
index eaee522..69f2186 100644
--- a/src/tb/tb_sha256.v
+++ b/src/tb/tb_sha256.v
@@ -7,6 +7,7 @@
//
// 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
@@ -103,10 +104,10 @@ module tb_sha256();
reg tb_clk;
reg tb_reset_n;
reg tb_cs;
- reg tb_write_read;
+ reg tb_we;
reg [7 : 0] tb_address;
- reg [31 : 0] tb_data_in;
- wire [31 : 0] tb_data_out;
+ reg [31 : 0] tb_write_data;
+ wire [31 : 0] tb_read_data;
wire tb_error;
reg [31 : 0] read_data;
@@ -121,12 +122,12 @@ module tb_sha256();
.reset_n(tb_reset_n),
.cs(tb_cs),
- .write_read(tb_write_read),
+ .we(tb_we),
.address(tb_address),
- .data_in(tb_data_in),
- .data_out(tb_data_out),
+ .write_data(tb_write_data),
+ .read_data(tb_read_data),
.error(tb_error)
);
@@ -165,12 +166,12 @@ module tb_sha256();
$display("State of DUT");
$display("------------");
$display("Inputs and outputs:");
- $display("cs = 0x%01x, write_read = 0x%01x",
- dut.cs, dut.write_read);
+ $display("cs = 0x%01x, we = 0x%01x",
+ dut.cs, dut.we);
$display("address = 0x%02x", dut.address);
- $display("data_in = 0x%08x, data_out = 0x%08x",
- dut.data_in, dut.data_out);
- $display("tmp_data_out = 0x%08x", dut.tmp_data_out);
+ $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:");
@@ -229,9 +230,9 @@ module tb_sha256();
tb_clk = 0;
tb_reset_n = 0;
tb_cs = 0;
- tb_write_read = 0;
+ tb_we = 0;
tb_address = 6'h00;
- tb_data_in = 32'h00000000;
+ tb_write_data = 32'h00000000;
end
endtask // init_dut
@@ -293,12 +294,12 @@ module tb_sha256();
end
tb_address = address;
- tb_data_in = word;
+ tb_write_data = word;
tb_cs = 1;
- tb_write_read = 1;
+ tb_we = 1;
#(2 * CLK_HALF_PERIOD);
tb_cs = 0;
- tb_write_read = 0;
+ tb_we = 0;
end
endtask // write_word
@@ -341,9 +342,9 @@ module tb_sha256();
begin
tb_address = address;
tb_cs = 1;
- tb_write_read = 0;
+ tb_we = 0;
#(2 * CLK_HALF_PERIOD);
- read_data = tb_data_out;
+ read_data = tb_read_data;
tb_cs = 0;
if (DEBUG)
@@ -416,8 +417,8 @@ module tb_sha256();
//
// Perform test of a single block digest.
//----------------------------------------------------------------
- task single_block_test([511 : 0] block,
- [255 : 0] expected);
+ task single_block_test(input [511 : 0] block,
+ input [255 : 0] expected);
begin
$display("*** TC%01d - Single block test started.", tc_ctr);
@@ -451,10 +452,10 @@ module tb_sha256();
// 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
+ task double_block_test(input [511 : 0] block0,
+ input [255 : 0] expected0,
+ input [511 : 0] block1,
+ input [255 : 0] expected1
);
begin
$display("*** TC%01d - Double block test started.", tc_ctr);