[Cryptech-Commits] [core/sha512] 01/01: Adding source RTL files for the sha512 core.
git at cryptech.is
git at cryptech.is
Sat Apr 5 12:13:15 UTC 2014
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joachim at secworks.se pushed a commit to branch master
in repository core/sha512.
commit b4b54c02f73007312a3e759215d2e23a1df3ee88
Author: Joachim Strömbergson <joachim at secworks.se>
Date: Sat Apr 5 14:13:09 2014 +0200
Adding source RTL files for the sha512 core.
---
src/rtl/sha512.v | 1060 ++++++++++++++++++++++++++++++++++++++++++
src/rtl/sha512_core.v | 537 +++++++++++++++++++++
src/rtl/sha512_h_constants.v | 143 ++++++
src/rtl/sha512_k_constants.v | 472 +++++++++++++++++++
src/rtl/sha512_w_mem.v | 346 ++++++++++++++
5 files changed, 2558 insertions(+)
diff --git a/src/rtl/sha512.v b/src/rtl/sha512.v
new file mode 100644
index 0000000..e3608e7
--- /dev/null
+++ b/src/rtl/sha512.v
@@ -0,0 +1,1060 @@
+//======================================================================
+//
+// sha512.v
+// --------
+// Top level wrapper for the SHA-512 hash function providing
+// a simple memory like interface with 32 bit data access.
+//
+//
+// 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,
+// 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.
+//
+//======================================================================
+
+module sha512(
+ // Clock and reset.
+ input wire clk,
+ input wire reset_n,
+
+ // Control.
+ input wire cs,
+ input wire we,
+
+ // Data ports.
+ input wire [7 : 0] address,
+ input wire [31 : 0] write_data,
+ output wire [31 : 0] read_data,
+ output wire error
+ );
+
+ //----------------------------------------------------------------
+ // Internal constant and parameter definitions.
+ //----------------------------------------------------------------
+ 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_NEXT_BIT = 1;
+ parameter CTRL_MODE_LOW_BIT = 2;
+ parameter CTRL_MODE_HIGH_BIT = 3;
+
+ 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_BLOCK16 = 8'h20;
+ parameter ADDR_BLOCK17 = 8'h21;
+ parameter ADDR_BLOCK18 = 8'h22;
+ parameter ADDR_BLOCK19 = 8'h23;
+ parameter ADDR_BLOCK20 = 8'h24;
+ parameter ADDR_BLOCK21 = 8'h25;
+ parameter ADDR_BLOCK22 = 8'h26;
+ parameter ADDR_BLOCK23 = 8'h27;
+ parameter ADDR_BLOCK24 = 8'h28;
+ parameter ADDR_BLOCK25 = 8'h29;
+ parameter ADDR_BLOCK26 = 8'h2a;
+ parameter ADDR_BLOCK27 = 8'h2b;
+ parameter ADDR_BLOCK28 = 8'h2c;
+ parameter ADDR_BLOCK29 = 8'h2d;
+ parameter ADDR_BLOCK30 = 8'h2e;
+ parameter ADDR_BLOCK31 = 8'h2f;
+
+ parameter ADDR_DIGEST0 = 8'h40;
+ parameter ADDR_DIGEST1 = 8'h41;
+ parameter ADDR_DIGEST2 = 8'h42;
+ parameter ADDR_DIGEST3 = 8'h43;
+ parameter ADDR_DIGEST4 = 8'h44;
+ parameter ADDR_DIGEST5 = 8'h45;
+ parameter ADDR_DIGEST6 = 8'h46;
+ parameter ADDR_DIGEST7 = 8'h47;
+ parameter ADDR_DIGEST8 = 8'h48;
+ parameter ADDR_DIGEST9 = 8'h49;
+ parameter ADDR_DIGEST10 = 8'h4a;
+ parameter ADDR_DIGEST11 = 8'h4b;
+ parameter ADDR_DIGEST12 = 8'h4c;
+ parameter ADDR_DIGEST13 = 8'h4d;
+ parameter ADDR_DIGEST14 = 8'h4e;
+ parameter ADDR_DIGEST15 = 8'h4f;
+
+ parameter CORE_NAME0 = 32'h73686132; // "sha2"
+ parameter CORE_NAME1 = 32'h2d353132; // "-512"
+ parameter CORE_VERSION = 32'h302e3830; // "0.80"
+
+ parameter MODE_SHA_512_224 = 2'h0;
+ parameter MODE_SHA_512_256 = 2'h1;
+ parameter MODE_SHA_384 = 2'h2;
+ parameter MODE_SHA_512 = 2'h3;
+
+
+ //----------------------------------------------------------------
+ // Registers including update variables and write enable.
+ //----------------------------------------------------------------
+ reg init_reg;
+ reg init_new;
+ reg init_we;
+ reg init_set;
+
+ reg next_reg;
+ reg next_new;
+ reg next_we;
+ reg next_set;
+
+ reg [1 : 0] mode_reg;
+ reg [1 : 0] mode_new;
+ reg mode_we;
+
+ reg ready_reg;
+
+ reg [31 : 0] block0_reg;
+ reg block0_we;
+ reg [31 : 0] block1_reg;
+ reg block1_we;
+ reg [31 : 0] block2_reg;
+ reg block2_we;
+ reg [31 : 0] block3_reg;
+ reg block3_we;
+ reg [31 : 0] block4_reg;
+ reg block4_we;
+ reg [31 : 0] block5_reg;
+ reg block5_we;
+ reg [31 : 0] block6_reg;
+ reg block6_we;
+ reg [31 : 0] block7_reg;
+ reg block7_we;
+ reg [31 : 0] block8_reg;
+ reg block8_we;
+ reg [31 : 0] block9_reg;
+ reg block9_we;
+ reg [31 : 0] block10_reg;
+ reg block10_we;
+ reg [31 : 0] block11_reg;
+ reg block11_we;
+ reg [31 : 0] block12_reg;
+ reg block12_we;
+ reg [31 : 0] block13_reg;
+ reg block13_we;
+ reg [31 : 0] block14_reg;
+ reg block14_we;
+ reg [31 : 0] block15_reg;
+ reg block15_we;
+ reg [31 : 0] block16_reg;
+ reg block16_we;
+ reg [31 : 0] block17_reg;
+ reg block17_we;
+ reg [31 : 0] block18_reg;
+ reg block18_we;
+ reg [31 : 0] block19_reg;
+ reg block19_we;
+ reg [31 : 0] block20_reg;
+ reg block20_we;
+ reg [31 : 0] block21_reg;
+ reg block21_we;
+ reg [31 : 0] block22_reg;
+ reg block22_we;
+ reg [31 : 0] block23_reg;
+ reg block23_we;
+ reg [31 : 0] block24_reg;
+ reg block24_we;
+ reg [31 : 0] block25_reg;
+ reg block25_we;
+ reg [31 : 0] block26_reg;
+ reg block26_we;
+ reg [31 : 0] block27_reg;
+ reg block27_we;
+ reg [31 : 0] block28_reg;
+ reg block28_we;
+ reg [31 : 0] block29_reg;
+ reg block29_we;
+ reg [31 : 0] block30_reg;
+ reg block30_we;
+ reg [31 : 0] block31_reg;
+ reg block31_we;
+
+ reg [511 : 0] digest_reg;
+ reg digest_valid_reg;
+
+
+ //----------------------------------------------------------------
+ // Wires.
+ //----------------------------------------------------------------
+ wire core_init;
+ wire core_next;
+ wire [1 : 0] core_mode;
+ wire core_ready;
+ wire [1023 : 0] core_block;
+ wire [511 : 0] core_digest;
+ wire core_digest_valid;
+
+ reg [31 : 0] tmp_read_data;
+ reg tmp_error;
+
+
+ //----------------------------------------------------------------
+ // Concurrent connectivity for ports etc.
+ //----------------------------------------------------------------
+ assign core_init = init_reg;
+
+ assign core_next = next_reg;
+
+ assign core_mode = mode_reg;
+
+ assign core_block = {block0_reg, block1_reg, block2_reg, block3_reg, block4_reg,
+ block5_reg, block6_reg, block7_reg, block8_reg, block9_reg,
+ block10_reg, block11_reg, block12_reg, block13_reg, block14_reg,
+ block15_reg, block16_reg, block17_reg, block18_reg, block19_reg,
+ block20_reg, block21_reg, block22_reg, block23_reg, block24_reg,
+ block25_reg, block26_reg, block27_reg, block28_reg, block29_reg,
+ block30_reg, block31_reg};
+
+ assign read_data = tmp_read_data;
+ assign error = tmp_error;
+
+
+ //----------------------------------------------------------------
+ // core instantiation.
+ //----------------------------------------------------------------
+ sha512_core core(
+ .clk(clk),
+ .reset_n(reset_n),
+
+ .init(core_init),
+ .next(core_next),
+ .mode(core_mode),
+
+ .block(core_block),
+
+ .ready(core_ready),
+
+ .digest(core_digest),
+ .digest_valid(core_digest_valid)
+ );
+
+
+ //----------------------------------------------------------------
+ // reg_update
+ //
+ // Update functionality for all registers in the core.
+ // All registers are positive edge triggered with synchronous
+ // active low reset. All registers have write enable.
+ //----------------------------------------------------------------
+ always @ (posedge clk)
+ begin
+ if (!reset_n)
+ begin
+ init_reg <= 0;
+ next_reg <= 0;
+ mode_reg <= MODE_SHA_512;
+ ready_reg <= 0;
+ digest_reg <= {16{32'h00000000}};
+ digest_valid_reg <= 0;
+ block0_reg <= 32'h00000000;
+ block1_reg <= 32'h00000000;
+ block2_reg <= 32'h00000000;
+ block3_reg <= 32'h00000000;
+ block4_reg <= 32'h00000000;
+ block5_reg <= 32'h00000000;
+ block6_reg <= 32'h00000000;
+ block7_reg <= 32'h00000000;
+ block8_reg <= 32'h00000000;
+ block9_reg <= 32'h00000000;
+ block10_reg <= 32'h00000000;
+ block11_reg <= 32'h00000000;
+ block12_reg <= 32'h00000000;
+ block13_reg <= 32'h00000000;
+ block14_reg <= 32'h00000000;
+ block15_reg <= 32'h00000000;
+ block16_reg <= 32'h00000000;
+ block17_reg <= 32'h00000000;
+ block18_reg <= 32'h00000000;
+ block19_reg <= 32'h00000000;
+ block20_reg <= 32'h00000000;
+ block21_reg <= 32'h00000000;
+ block22_reg <= 32'h00000000;
+ block23_reg <= 32'h00000000;
+ block24_reg <= 32'h00000000;
+ block25_reg <= 32'h00000000;
+ block26_reg <= 32'h00000000;
+ block27_reg <= 32'h00000000;
+ block28_reg <= 32'h00000000;
+ block29_reg <= 32'h00000000;
+ block30_reg <= 32'h00000000;
+ block31_reg <= 32'h00000000;
+ end
+ else
+ begin
+ ready_reg <= core_ready;
+ digest_valid_reg <= core_digest_valid;
+
+ if (init_we)
+ begin
+ init_reg <= init_new;
+ end
+
+ if (next_we)
+ begin
+ next_reg <= next_new;
+ end
+
+ if (mode_we)
+ begin
+ mode_reg <= mode_new;
+ end
+
+ if (core_digest_valid)
+ begin
+ digest_reg <= core_digest;
+ end
+
+ if (block0_we)
+ begin
+ block0_reg <= write_data;
+ end
+
+ if (block1_we)
+ begin
+ block1_reg <= write_data;
+ end
+
+ if (block2_we)
+ begin
+ block2_reg <= write_data;
+ end
+
+ if (block3_we)
+ begin
+ block3_reg <= write_data;
+ end
+
+ if (block4_we)
+ begin
+ block4_reg <= write_data;
+ end
+
+ if (block5_we)
+ begin
+ block5_reg <= write_data;
+ end
+
+ if (block6_we)
+ begin
+ block6_reg <= write_data;
+ end
+
+ if (block7_we)
+ begin
+ block7_reg <= write_data;
+ end
+
+ if (block8_we)
+ begin
+ block8_reg <= write_data;
+ end
+
+ if (block9_we)
+ begin
+ block9_reg <= write_data;
+ end
+
+ if (block10_we)
+ begin
+ block10_reg <= write_data;
+ end
+
+ if (block11_we)
+ begin
+ block11_reg <= write_data;
+ end
+
+ if (block12_we)
+ begin
+ block12_reg <= write_data;
+ end
+
+ if (block13_we)
+ begin
+ block13_reg <= write_data;
+ end
+
+ if (block14_we)
+ begin
+ block14_reg <= write_data;
+ end
+
+ if (block15_we)
+ begin
+ block15_reg <= write_data;
+ end
+
+ if (block16_we)
+ begin
+ block16_reg <= write_data;
+ end
+
+ if (block17_we)
+ begin
+ block17_reg <= write_data;
+ end
+
+ if (block18_we)
+ begin
+ block18_reg <= write_data;
+ end
+
+ if (block19_we)
+ begin
+ block19_reg <= write_data;
+ end
+
+ if (block20_we)
+ begin
+ block20_reg <= write_data;
+ end
+
+ if (block21_we)
+ begin
+ block21_reg <= write_data;
+ end
+
+ if (block22_we)
+ begin
+ block22_reg <= write_data;
+ end
+
+ if (block23_we)
+ begin
+ block23_reg <= write_data;
+ end
+
+ if (block24_we)
+ begin
+ block24_reg <= write_data;
+ end
+
+ if (block25_we)
+ begin
+ block25_reg <= write_data;
+ end
+
+ if (block26_we)
+ begin
+ block26_reg <= write_data;
+ end
+
+ if (block27_we)
+ begin
+ block27_reg <= write_data;
+ end
+
+ if (block28_we)
+ begin
+ block28_reg <= write_data;
+ end
+
+ if (block29_we)
+ begin
+ block29_reg <= write_data;
+ end
+
+ if (block30_we)
+ begin
+ block30_reg <= write_data;
+ end
+
+ if (block31_we)
+ begin
+ block31_reg <= write_data;
+ end
+ end
+ end // reg_update
+
+
+ //----------------------------------------------------------------
+ // flag_reset
+ //
+ // Logic to reset init and next flags that has been set.
+ //----------------------------------------------------------------
+ always @*
+ begin : flag_reset
+ init_new = 0;
+ init_we = 0;
+ next_new = 0;
+ next_we = 0;
+
+ if (init_set)
+ begin
+ init_new = 1;
+ init_we = 1;
+ end
+ else if (init_reg)
+ begin
+ init_new = 0;
+ init_we = 1;
+ end
+
+ if (next_set)
+ begin
+ next_new = 1;
+ next_we = 1;
+ end
+ else if (next_reg)
+ begin
+ next_new = 0;
+ next_we = 1;
+ end
+ end
+
+
+ //----------------------------------------------------------------
+ // api_logic
+ //
+ // Implementation of the api logic. If cs is enabled will either
+ // try to write to or read from the internal registers.
+ //----------------------------------------------------------------
+ always @*
+ begin : api_logic
+ init_set = 0;
+ next_set = 0;
+ mode_new = 2'b00;
+ mode_we = 0;
+ block0_we = 0;
+ block1_we = 0;
+ block2_we = 0;
+ block3_we = 0;
+ block4_we = 0;
+ block5_we = 0;
+ block6_we = 0;
+ block7_we = 0;
+ block8_we = 0;
+ block9_we = 0;
+ block10_we = 0;
+ block11_we = 0;
+ block12_we = 0;
+ block13_we = 0;
+ block14_we = 0;
+ block15_we = 0;
+ block16_we = 0;
+ block17_we = 0;
+ block18_we = 0;
+ block19_we = 0;
+ block20_we = 0;
+ block21_we = 0;
+ block22_we = 0;
+ block23_we = 0;
+ block24_we = 0;
+ block25_we = 0;
+ block26_we = 0;
+ block27_we = 0;
+ block28_we = 0;
+ block29_we = 0;
+ block30_we = 0;
+ block31_we = 0;
+ tmp_read_data = 32'h00000000;
+ tmp_error = 0;
+
+ if (cs)
+ begin
+ if (we)
+ begin
+ case (address)
+ // Write operations.
+ ADDR_CTRL:
+ begin
+ init_set = write_data[CTRL_INIT_BIT];
+ next_set = write_data[CTRL_NEXT_BIT];
+ mode_new = write_data[CTRL_MODE_HIGH_BIT : CTRL_MODE_LOW_BIT];
+ mode_we = 1;
+ end
+
+ ADDR_BLOCK0:
+ begin
+ block0_we = 1;
+ end
+
+ ADDR_BLOCK1:
+ begin
+ block1_we = 1;
+ end
+
+ ADDR_BLOCK2:
+ begin
+ block2_we = 1;
+ end
+
+ ADDR_BLOCK3:
+ begin
+ block3_we = 1;
+ end
+
+ ADDR_BLOCK4:
+ begin
+ block4_we = 1;
+ end
+
+ ADDR_BLOCK5:
+ begin
+ block5_we = 1;
+ end
+
+ ADDR_BLOCK6:
+ begin
+ block6_we = 1;
+ end
+
+ ADDR_BLOCK7:
+ begin
+ block7_we = 1;
+ end
+
+ ADDR_BLOCK8:
+ begin
+ block8_we = 1;
+ end
+
+ ADDR_BLOCK9:
+ begin
+ block9_we = 1;
+ end
+
+ ADDR_BLOCK10:
+ begin
+ block10_we = 1;
+ end
+
+ ADDR_BLOCK11:
+ begin
+ block11_we = 1;
+ end
+
+ ADDR_BLOCK12:
+ begin
+ block12_we = 1;
+ end
+
+ ADDR_BLOCK13:
+ begin
+ block13_we = 1;
+ end
+
+ ADDR_BLOCK14:
+ begin
+ block14_we = 1;
+ end
+
+ ADDR_BLOCK15:
+ begin
+ block15_we = 1;
+ end
+
+ ADDR_BLOCK16:
+ begin
+ block16_we = 1;
+ end
+
+ ADDR_BLOCK17:
+ begin
+ block17_we = 1;
+ end
+
+ ADDR_BLOCK18:
+ begin
+ block18_we = 1;
+ end
+
+ ADDR_BLOCK19:
+ begin
+ block19_we = 1;
+ end
+
+ ADDR_BLOCK20:
+ begin
+ block20_we = 1;
+ end
+
+ ADDR_BLOCK21:
+ begin
+ block21_we = 1;
+ end
+
+ ADDR_BLOCK22:
+ begin
+ block22_we = 1;
+ end
+
+ ADDR_BLOCK23:
+ begin
+ block23_we = 1;
+ end
+
+ ADDR_BLOCK24:
+ begin
+ block24_we = 1;
+ end
+
+ ADDR_BLOCK25:
+ begin
+ block25_we = 1;
+ end
+
+ ADDR_BLOCK26:
+ begin
+ block26_we = 1;
+ end
+
+ ADDR_BLOCK27:
+ begin
+ block27_we = 1;
+ end
+
+ ADDR_BLOCK28:
+ begin
+ block28_we = 1;
+ end
+
+ ADDR_BLOCK29:
+ begin
+ block29_we = 1;
+ end
+
+ ADDR_BLOCK30:
+ begin
+ block30_we = 1;
+ end
+
+ ADDR_BLOCK31:
+ begin
+ block31_we = 1;
+ end
+
+ default:
+ begin
+ tmp_error = 1;
+ end
+ endcase // case (address)
+ end // if (we)
+
+ else
+ begin
+ case (address)
+ // Read operations.
+ ADDR_NAME0:
+ begin
+ tmp_read_data = CORE_NAME0;
+ end
+
+ ADDR_NAME1:
+ begin
+ tmp_read_data = CORE_NAME1;
+ end
+
+ ADDR_VERSION:
+ begin
+ tmp_read_data = CORE_VERSION;
+ end
+
+ ADDR_CTRL:
+ begin
+ tmp_read_data = {28'h0000000, mode_reg, next_reg, init_reg};
+ end
+
+ ADDR_STATUS:
+ begin
+ tmp_read_data = {28'h0000000, 2'b00, digest_valid_reg, ready_reg};
+ end
+
+ ADDR_BLOCK0:
+ begin
+ tmp_read_data = block0_reg;
+ end
+
+ ADDR_BLOCK1:
+ begin
+ tmp_read_data = block1_reg;
+ end
+
+ ADDR_BLOCK2:
+ begin
+ tmp_read_data = block2_reg;
+ end
+
+ ADDR_BLOCK3:
+ begin
+ tmp_read_data = block3_reg;
+ end
+
+ ADDR_BLOCK4:
+ begin
+ tmp_read_data = block4_reg;
+ end
+
+ ADDR_BLOCK5:
+ begin
+ tmp_read_data = block5_reg;
+ end
+
+ ADDR_BLOCK6:
+ begin
+ tmp_read_data = block6_reg;
+ end
+
+ ADDR_BLOCK7:
+ begin
+ tmp_read_data = block7_reg;
+ end
+
+ ADDR_BLOCK8:
+ begin
+ tmp_read_data = block8_reg;
+ end
+
+ ADDR_BLOCK9:
+ begin
+ tmp_read_data = block9_reg;
+ end
+
+ ADDR_BLOCK10:
+ begin
+ tmp_read_data = block10_reg;
+ end
+
+ ADDR_BLOCK11:
+ begin
+ tmp_read_data = block11_reg;
+ end
+
+ ADDR_BLOCK12:
+ begin
+ tmp_read_data = block12_reg;
+ end
+
+ ADDR_BLOCK13:
+ begin
+ tmp_read_data = block13_reg;
+ end
+
+ ADDR_BLOCK14:
+ begin
+ tmp_read_data = block14_reg;
+ end
+
+ ADDR_BLOCK15:
+ begin
+ tmp_read_data = block15_reg;
+ end
+
+ ADDR_BLOCK16:
+ begin
+ tmp_read_data = block16_reg;
+ end
+
+ ADDR_BLOCK17:
+ begin
+ tmp_read_data = block17_reg;
+ end
+
+ ADDR_BLOCK18:
+ begin
+ tmp_read_data = block18_reg;
+ end
+
+ ADDR_BLOCK19:
+ begin
+ tmp_read_data = block19_reg;
+ end
+
+ ADDR_BLOCK20:
+ begin
+ tmp_read_data = block20_reg;
+ end
+
+ ADDR_BLOCK21:
+ begin
+ tmp_read_data = block21_reg;
+ end
+
+ ADDR_BLOCK22:
+ begin
+ tmp_read_data = block22_reg;
+ end
+
+ ADDR_BLOCK23:
+ begin
+ tmp_read_data = block23_reg;
+ end
+
+ ADDR_BLOCK24:
+ begin
+ tmp_read_data = block24_reg;
+ end
+
+ ADDR_BLOCK25:
+ begin
+ tmp_read_data = block25_reg;
+ end
+
+ ADDR_BLOCK26:
+ begin
+ tmp_read_data = block26_reg;
+ end
+
+ ADDR_BLOCK27:
+ begin
+ tmp_read_data = block27_reg;
+ end
+
+ ADDR_BLOCK28:
+ begin
+ tmp_read_data = block28_reg;
+ end
+
+ ADDR_BLOCK29:
+ begin
+ tmp_read_data = block29_reg;
+ end
+
+ ADDR_BLOCK30:
+ begin
+ tmp_read_data = block30_reg;
+ end
+
+ ADDR_BLOCK31:
+ begin
+ tmp_read_data = block31_reg;
+ end
+
+ ADDR_DIGEST0:
+ begin
+ tmp_read_data = digest_reg[511 : 480];
+ end
+
+ ADDR_DIGEST1:
+ begin
+ tmp_read_data = digest_reg[479 : 448];
+ end
+
+ ADDR_DIGEST2:
+ begin
+ tmp_read_data = digest_reg[447 : 416];
+ end
+
+ ADDR_DIGEST3:
+ begin
+ tmp_read_data = digest_reg[415 : 384];
+ end
+
+ ADDR_DIGEST4:
+ begin
+ tmp_read_data = digest_reg[383 : 352];
+ end
+
+ ADDR_DIGEST5:
+ begin
+ tmp_read_data = digest_reg[351 : 320];
+ end
+
+ ADDR_DIGEST6:
+ begin
+ tmp_read_data = digest_reg[319 : 288];
+ end
+
+ ADDR_DIGEST7:
+ begin
+ tmp_read_data = digest_reg[287 : 256];
+ end
+
+ ADDR_DIGEST8:
+ begin
+ tmp_read_data = digest_reg[255 : 224];
+ end
+
+ ADDR_DIGEST9:
+ begin
+ tmp_read_data = digest_reg[223 : 192];
+ end
+
+ ADDR_DIGEST10:
+ begin
+ tmp_read_data = digest_reg[191 : 160];
+ end
+
+ ADDR_DIGEST11:
+ begin
+ tmp_read_data = digest_reg[159 : 128];
+ end
+
+ ADDR_DIGEST12:
+ begin
+ tmp_read_data = digest_reg[127 : 96];
+ end
+
+ ADDR_DIGEST13:
+ begin
+ tmp_read_data = digest_reg[95 : 64];
+ end
+
+ ADDR_DIGEST14:
+ begin
+ tmp_read_data = digest_reg[63 : 32];
+ end
+
+ ADDR_DIGEST15:
+ begin
+ tmp_read_data = digest_reg[31 : 0];
+ end
+
+ default:
+ begin
+ tmp_error = 1;
+ end
+ endcase // case (address)
+ end
+ end
+ end // addr_decoder
+endmodule // sha512
+
+//======================================================================
+// EOF sha512.v
+//======================================================================
diff --git a/src/rtl/sha512_core.v b/src/rtl/sha512_core.v
new file mode 100644
index 0000000..c3a2de6
--- /dev/null
+++ b/src/rtl/sha512_core.v
@@ -0,0 +1,537 @@
+//======================================================================
+//
+// sha512_core.v
+// -------------
+// Verilog 2001 implementation of the SHA-512 hash function.
+// This is the internal core with wide interfaces.
+//
+//
+// 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,
+// 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.
+//
+//======================================================================
+
+module sha512_core(
+ input wire clk,
+ input wire reset_n,
+
+ input wire init,
+ input wire next,
+ input wire [1 : 0] mode,
+
+ input wire [1023 : 0] block,
+
+ output wire ready,
+ output wire [511 : 0] digest,
+ output wire digest_valid
+ );
+
+
+ //----------------------------------------------------------------
+ // Internal constant and parameter definitions.
+ //----------------------------------------------------------------
+ parameter SHA512_ROUNDS = 79;
+
+ parameter CTRL_IDLE = 0;
+ parameter CTRL_ROUNDS = 1;
+ parameter CTRL_DONE = 2;
+
+
+ //----------------------------------------------------------------
+ // Registers including update variables and write enable.
+ //----------------------------------------------------------------
+ reg [63 : 0] a_reg;
+ reg [63 : 0] a_new;
+ reg [63 : 0] b_reg;
+ reg [63 : 0] b_new;
+ reg [63 : 0] c_reg;
+ reg [63 : 0] c_new;
+ reg [63 : 0] d_reg;
+ reg [63 : 0] d_new;
+ reg [63 : 0] e_reg;
+ reg [63 : 0] e_new;
+ reg [63 : 0] f_reg;
+ reg [63 : 0] f_new;
+ reg [63 : 0] g_reg;
+ reg [63 : 0] g_new;
+ reg [63 : 0] h_reg;
+ reg [63 : 0] h_new;
+ reg a_h_we;
+
+ reg [63 : 0] H0_reg;
+ reg [63 : 0] H0_new;
+ reg [63 : 0] H1_reg;
+ reg [63 : 0] H1_new;
+ reg [63 : 0] H2_reg;
+ reg [63 : 0] H2_new;
+ reg [63 : 0] H3_reg;
+ reg [63 : 0] H3_new;
+ reg [63 : 0] H4_reg;
+ reg [63 : 0] H4_new;
+ reg [63 : 0] H5_reg;
+ reg [63 : 0] H5_new;
+ reg [63 : 0] H6_reg;
+ reg [63 : 0] H6_new;
+ reg [63 : 0] H7_reg;
+ reg [63 : 0] H7_new;
+ reg H_we;
+
+ reg [6 : 0] t_ctr_reg;
+ reg [6 : 0] t_ctr_new;
+ reg t_ctr_we;
+ reg t_ctr_inc;
+ reg t_ctr_rst;
+
+ reg digest_valid_reg;
+ reg digest_valid_new;
+ reg digest_valid_we;
+
+ reg [1 : 0] sha512_ctrl_reg;
+ reg [1 : 0] sha512_ctrl_new;
+ reg sha512_ctrl_we;
+
+
+ //----------------------------------------------------------------
+ // Wires.
+ //----------------------------------------------------------------
+ reg digest_init;
+ reg digest_update;
+
+ reg state_init;
+ reg state_update;
+
+ reg first_block;
+
+ reg ready_flag;
+
+ reg [63 : 0] t1;
+ reg [63 : 0] t2;
+
+ wire [63 : 0] k_data;
+
+ reg w_init;
+ reg w_next;
+ wire [63 : 0] w_data;
+
+ wire [63 : 0] H0_0;
+ wire [63 : 0] H0_1;
+ wire [63 : 0] H0_2;
+ wire [63 : 0] H0_3;
+ wire [63 : 0] H0_4;
+ wire [63 : 0] H0_5;
+ wire [63 : 0] H0_6;
+ wire [63 : 0] H0_7;
+
+
+ //----------------------------------------------------------------
+ // Module instantiantions.
+ //----------------------------------------------------------------
+ sha512_k_constants k_constants(
+ .addr(t_ctr_reg),
+ .K(k_data)
+ );
+
+
+ sha512_h_constants h_constants(
+ .mode(mode),
+
+ .H0(H0_0),
+ .H1(H0_1),
+ .H2(H0_2),
+ .H3(H0_3),
+ .H4(H0_4),
+ .H5(H0_5),
+ .H6(H0_6),
+ .H7(H0_7)
+ );
+
+
+ sha512_w_mem w_mem(
+ .clk(clk),
+ .reset_n(reset_n),
+
+ .block(block),
+
+ .init(w_init),
+ .next(w_next),
+ .w(w_data)
+ );
+
+
+ //----------------------------------------------------------------
+ // Concurrent connectivity for ports etc.
+ //----------------------------------------------------------------
+ assign ready = ready_flag;
+
+ assign digest = {H0_reg, H1_reg, H2_reg, H3_reg,
+ H4_reg, H5_reg, H6_reg, H7_reg};
+
+ assign digest_valid = digest_valid_reg;
+
+
+ //----------------------------------------------------------------
+ // reg_update
+ // Update functionality for all registers in the core.
+ // All registers are positive edge triggered with synchronous
+ // active low reset. All registers have write enable.
+ //----------------------------------------------------------------
+ always @ (posedge clk)
+ begin : reg_update
+ if (!reset_n)
+ begin
+ a_reg <= 64'h00000000;
+ b_reg <= 64'h00000000;
+ c_reg <= 64'h00000000;
+ d_reg <= 64'h00000000;
+ e_reg <= 64'h00000000;
+ f_reg <= 64'h00000000;
+ g_reg <= 64'h00000000;
+ h_reg <= 64'h00000000;
+ H0_reg <= 64'h00000000;
+ H1_reg <= 64'h00000000;
+ H2_reg <= 64'h00000000;
+ H3_reg <= 64'h00000000;
+ H4_reg <= 64'h00000000;
+ H5_reg <= 64'h00000000;
+ H6_reg <= 64'h00000000;
+ H7_reg <= 64'h00000000;
+ digest_valid_reg <= 0;
+ t_ctr_reg <= 7'h00;
+ sha512_ctrl_reg <= CTRL_IDLE;
+ end
+ else
+ begin
+
+ if (a_h_we)
+ begin
+ a_reg <= a_new;
+ b_reg <= b_new;
+ c_reg <= c_new;
+ d_reg <= d_new;
+ e_reg <= e_new;
+ f_reg <= f_new;
+ g_reg <= g_new;
+ h_reg <= h_new;
+ end
+
+ if (H_we)
+ begin
+ H0_reg <= H0_new;
+ H1_reg <= H1_new;
+ H2_reg <= H2_new;
+ H3_reg <= H3_new;
+ H4_reg <= H4_new;
+ H5_reg <= H5_new;
+ H6_reg <= H6_new;
+ H7_reg <= H7_new;
+ end
+
+ if (t_ctr_we)
+ begin
+ t_ctr_reg <= t_ctr_new;
+ end
+
+ if (digest_valid_we)
+ begin
+ digest_valid_reg <= digest_valid_new;
+ end
+
+ if (sha512_ctrl_we)
+ begin
+ sha512_ctrl_reg <= sha512_ctrl_new;
+ end
+ end
+ end // reg_update
+
+
+ //----------------------------------------------------------------
+ // digest_logic
+ //
+ // The logic needed to init as well as update the digest.
+ //----------------------------------------------------------------
+ always @*
+ begin : digest_logic
+ H0_new = 64'h00000000;
+ H1_new = 64'h00000000;
+ H2_new = 64'h00000000;
+ H3_new = 64'h00000000;
+ H4_new = 64'h00000000;
+ H5_new = 64'h00000000;
+ H6_new = 64'h00000000;
+ H7_new = 64'h00000000;
+ H_we = 0;
+
+ if (digest_init)
+ begin
+ H0_new = H0_0;
+ H1_new = H0_1;
+ H2_new = H0_2;
+ H3_new = H0_3;
+ H4_new = H0_4;
+ H5_new = H0_5;
+ H6_new = H0_6;
+ H7_new = H0_7;
+ H_we = 1;
+ end
+
+ if (digest_update)
+ begin
+ H0_new = H0_reg + a_reg;
+ H1_new = H1_reg + b_reg;
+ H2_new = H2_reg + c_reg;
+ H3_new = H3_reg + d_reg;
+ H4_new = H4_reg + e_reg;
+ H5_new = H5_reg + f_reg;
+ H6_new = H6_reg + g_reg;
+ H7_new = H7_reg + h_reg;
+ H_we = 1;
+ end
+ end // digest_logic
+
+
+ //----------------------------------------------------------------
+ // t1_logic
+ //
+ // The logic for the T1 function.
+ //----------------------------------------------------------------
+ always @*
+ begin : t1_logic
+ reg [63 : 0] sum1;
+ reg [63 : 0] ch;
+
+ sum1 = {e_reg[13 : 0], e_reg[63 : 14]} ^
+ {e_reg[17 : 0], e_reg[63 : 18]} ^
+ {e_reg[40 : 0], e_reg[63 : 41]};
+
+ ch = (e_reg & f_reg) ^ ((~e_reg) & g_reg);
+
+ t1 = h_reg + sum1 + ch + k_data + w_data;
+ end // t1_logic
+
+
+ //----------------------------------------------------------------
+ // t2_logic
+ //
+ // The logic for the T2 function
+ //----------------------------------------------------------------
+ always @*
+ begin : t2_logic
+ reg [63 : 0] sum0;
+ reg [63 : 0] maj;
+
+ sum0 = {a_reg[27 : 0], a_reg[63 : 28]} ^
+ {a_reg[33 : 0], a_reg[63 : 34]} ^
+ {a_reg[38 : 0], a_reg[63 : 39]};
+
+ maj = (a_reg & b_reg) ^ (a_reg & c_reg) ^ (b_reg & c_reg);
+
+ t2 = sum0 + maj;
+ end // t2_logic
+
+
+ //----------------------------------------------------------------
+ // state_logic
+ //
+ // The logic needed to init as well as update the state during
+ // round processing.
+ //----------------------------------------------------------------
+ always @*
+ begin : state_logic
+ reg [63 : 0] tmp1;
+ reg [63 : 0] tmp2;
+
+ a_new = 64'h00000000;
+ b_new = 64'h00000000;
+ c_new = 64'h00000000;
+ d_new = 64'h00000000;
+ e_new = 64'h00000000;
+ f_new = 64'h00000000;
+ g_new = 64'h00000000;
+ h_new = 64'h00000000;
+ a_h_we = 0;
+
+ if (state_init)
+ begin
+ if (first_block)
+ begin
+ a_new = H0_0;
+ b_new = H0_1;
+ c_new = H0_2;
+ d_new = H0_3;
+ e_new = H0_4;
+ f_new = H0_5;
+ g_new = H0_6;
+ h_new = H0_7;
+ a_h_we = 1;
+ end
+ else
+ begin
+ a_new = H0_reg;
+ b_new = H1_reg;
+ c_new = H2_reg;
+ d_new = H3_reg;
+ e_new = H4_reg;
+ f_new = H5_reg;
+ g_new = H6_reg;
+ h_new = H7_reg;
+ a_h_we = 1;
+ end
+ end
+
+ if (state_update)
+ begin
+ a_new = t1 + t2;
+ b_new = a_reg;
+ c_new = b_reg;
+ d_new = c_reg;
+ e_new = d_reg + t1;
+ f_new = e_reg;
+ g_new = f_reg;
+ h_new = g_reg;
+ a_h_we = 1;
+ end
+ end // state_logic
+
+
+ //----------------------------------------------------------------
+ // t_ctr
+ //
+ // Update logic for the round counter, a monotonically
+ // increasing counter with reset.
+ //----------------------------------------------------------------
+ always @*
+ begin : t_ctr
+ t_ctr_new = 7'h00;
+ t_ctr_we = 0;
+
+ if (t_ctr_rst)
+ begin
+ t_ctr_new = 7'h00;
+ t_ctr_we = 1;
+ end
+
+ if (t_ctr_inc)
+ begin
+ t_ctr_new = t_ctr_reg + 1'b1;
+ t_ctr_we = 1;
+ end
+ end // t_ctr
+
+
+ //----------------------------------------------------------------
+ // sha512_ctrl_fsm
+ //
+ // Logic for the state machine controlling the core behaviour.
+ //----------------------------------------------------------------
+ always @*
+ begin : sha512_ctrl_fsm
+ digest_init = 0;
+ digest_update = 0;
+
+ state_init = 0;
+ state_update = 0;
+
+ first_block = 0;
+ ready_flag = 0;
+
+ w_init = 0;
+ w_next = 0;
+
+ t_ctr_inc = 0;
+ t_ctr_rst = 0;
+
+ digest_valid_new = 0;
+ digest_valid_we = 0;
+
+ sha512_ctrl_new = CTRL_IDLE;
+ sha512_ctrl_we = 0;
+
+
+ case (sha512_ctrl_reg)
+ CTRL_IDLE:
+ begin
+ ready_flag = 1;
+
+ if (init)
+ begin
+ digest_init = 1;
+ w_init = 1;
+ state_init = 1;
+ first_block = 1;
+ t_ctr_rst = 1;
+ digest_valid_new = 0;
+ digest_valid_we = 1;
+ sha512_ctrl_new = CTRL_ROUNDS;
+ sha512_ctrl_we = 1;
+ end
+
+ if (next)
+ begin
+ w_init = 1;
+ state_init = 1;
+ t_ctr_rst = 1;
+ digest_valid_new = 0;
+ digest_valid_we = 1;
+ sha512_ctrl_new = CTRL_ROUNDS;
+ sha512_ctrl_we = 1;
+ end
+ end
+
+
+ CTRL_ROUNDS:
+ begin
+ w_next = 1;
+ state_update = 1;
+ t_ctr_inc = 1;
+
+ if (t_ctr_reg == SHA512_ROUNDS)
+ begin
+ sha512_ctrl_new = CTRL_DONE;
+ sha512_ctrl_we = 1;
+ end
+ end
+
+
+ CTRL_DONE:
+ begin
+ digest_update = 1;
+ digest_valid_new = 1;
+ digest_valid_we = 1;
+
+ sha512_ctrl_new = CTRL_IDLE;
+ sha512_ctrl_we = 1;
+ end
+ endcase // case (sha512_ctrl_reg)
+ end // sha512_ctrl_fsm
+
+endmodule // sha512_core
+
+//======================================================================
+// EOF sha512_core.v
+//======================================================================
diff --git a/src/rtl/sha512_h_constants.v b/src/rtl/sha512_h_constants.v
new file mode 100644
index 0000000..3a38712
--- /dev/null
+++ b/src/rtl/sha512_h_constants.v
@@ -0,0 +1,143 @@
+//======================================================================
+//
+// sha512_h_constants.v
+// ---------------------
+// The H initial constants for the different modes in SHA-512.
+//
+//
+// 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,
+// 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.
+//
+//======================================================================
+
+module sha512_h_constants(
+ input wire [1 : 0] mode,
+
+ output wire [63 : 0] H0,
+ output wire [63 : 0] H1,
+ output wire [63 : 0] H2,
+ output wire [63 : 0] H3,
+ output wire [63 : 0] H4,
+ output wire [63 : 0] H5,
+ output wire [63 : 0] H6,
+ output wire [63 : 0] H7
+ );
+
+ //----------------------------------------------------------------
+ // Wires.
+ //----------------------------------------------------------------
+ reg [63 : 0] tmp_H0;
+ reg [63 : 0] tmp_H1;
+ reg [63 : 0] tmp_H2;
+ reg [63 : 0] tmp_H3;
+ reg [63 : 0] tmp_H4;
+ reg [63 : 0] tmp_H5;
+ reg [63 : 0] tmp_H6;
+ reg [63 : 0] tmp_H7;
+
+
+ //----------------------------------------------------------------
+ // Concurrent connectivity for ports etc.
+ //----------------------------------------------------------------
+ assign H0 = tmp_H0;
+ assign H1 = tmp_H1;
+ assign H2 = tmp_H2;
+ assign H3 = tmp_H3;
+ assign H4 = tmp_H4;
+ assign H5 = tmp_H5;
+ assign H6 = tmp_H6;
+ assign H7 = tmp_H7;
+
+
+ //----------------------------------------------------------------
+ // mode_mux
+ //
+ // Based on the given mode, the correct H constants are selected.
+ //----------------------------------------------------------------
+ always @*
+ begin : mode_mux
+ case(mode)
+ 0:
+ begin
+ // SHA-512/224
+ tmp_H0 = 64'h8c3d37c819544da2;
+ tmp_H1 = 64'h73e1996689dcd4d6;
+ tmp_H2 = 64'h1dfab7ae32ff9c82;
+ tmp_H3 = 64'h679dd514582f9fcf;
+ tmp_H4 = 64'h0f6d2b697bd44da8;
+ tmp_H5 = 64'h77e36f7304c48942;
+ tmp_H6 = 64'h3f9d85a86a1d36c8;
+ tmp_H7 = 64'h1112e6ad91d692a1;
+ end
+
+ 1:
+ begin
+ // SHA-512/256
+ tmp_H0 = 64'h22312194fc2bf72c;
+ tmp_H1 = 64'h9f555fa3c84c64c2;
+ tmp_H2 = 64'h2393b86b6f53b151;
+ tmp_H3 = 64'h963877195940eabd;
+ tmp_H4 = 64'h96283ee2a88effe3;
+ tmp_H5 = 64'hbe5e1e2553863992;
+ tmp_H6 = 64'h2b0199fc2c85b8aa;
+ tmp_H7 = 64'h0eb72ddc81c52ca2;
+ end
+
+ 2:
+ begin
+ // SHA-384
+ tmp_H0 = 64'hcbbb9d5dc1059ed8;
+ tmp_H1 = 64'h629a292a367cd507;
+ tmp_H2 = 64'h9159015a3070dd17;
+ tmp_H3 = 64'h152fecd8f70e5939;
+ tmp_H4 = 64'h67332667ffc00b31;
+ tmp_H5 = 64'h8eb44a8768581511;
+ tmp_H6 = 64'hdb0c2e0d64f98fa7;
+ tmp_H7 = 64'h47b5481dbefa4fa4;
+ end
+
+ 3:
+ begin
+ // SHA-512
+ tmp_H0 = 64'h6a09e667f3bcc908;
+ tmp_H1 = 64'hbb67ae8584caa73b;
+ tmp_H2 = 64'h3c6ef372fe94f82b;
+ tmp_H3 = 64'ha54ff53a5f1d36f1;
+ tmp_H4 = 64'h510e527fade682d1;
+ tmp_H5 = 64'h9b05688c2b3e6c1f;
+ tmp_H6 = 64'h1f83d9abfb41bd6b;
+ tmp_H7 = 64'h5be0cd19137e2179;
+ end
+ endcase // case (addr)
+ end // block: mode_mux
+endmodule // sha512_h_constants
+
+//======================================================================
+// sha512_h_constants.v
+//======================================================================
diff --git a/src/rtl/sha512_k_constants.v b/src/rtl/sha512_k_constants.v
new file mode 100644
index 0000000..61cfb6d
--- /dev/null
+++ b/src/rtl/sha512_k_constants.v
@@ -0,0 +1,472 @@
+//======================================================================
+//
+// sha512_k_constants.v
+// --------------------
+// The table K with constants in the SHA-512 hash function.
+//
+//
+// 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,
+// 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.
+//
+//======================================================================
+
+module sha512_k_constants(
+ input wire [6 : 0] addr,
+ output wire [63 : 0] K
+ );
+
+ //----------------------------------------------------------------
+ // Wires.
+ //----------------------------------------------------------------
+ reg [63 : 0] tmp_K;
+
+
+ //----------------------------------------------------------------
+ // Concurrent connectivity for ports etc.
+ //----------------------------------------------------------------
+ assign K = tmp_K;
+
+
+ //----------------------------------------------------------------
+ // addr_mux
+ //----------------------------------------------------------------
+ always @*
+ begin : addr_mux
+ case(addr)
+ 0:
+ begin
+ tmp_K = 64'h428a2f98d728ae22;
+ end
+
+ 1:
+ begin
+ tmp_K = 64'h7137449123ef65cd;
+ end
+
+ 2:
+ begin
+ tmp_K = 64'hb5c0fbcfec4d3b2f;
+ end
+
+ 3:
+ begin
+ tmp_K = 64'he9b5dba58189dbbc;
+ end
+
+ 4:
+ begin
+ tmp_K = 64'h3956c25bf348b538;
+ end
+
+ 5:
+ begin
+ tmp_K = 64'h59f111f1b605d019;
+ end
+
+ 6:
+ begin
+ tmp_K = 64'h923f82a4af194f9b;
+ end
+
+ 7:
+ begin
+ tmp_K = 64'hab1c5ed5da6d8118;
+ end
+
+ 8:
+ begin
+ tmp_K = 64'hd807aa98a3030242;
+ end
+
+ 9:
+ begin
+ tmp_K = 64'h12835b0145706fbe;
+ end
+
+ 10:
+ begin
+ tmp_K = 64'h243185be4ee4b28c;
+ end
+
+ 11:
+ begin
+ tmp_K = 64'h550c7dc3d5ffb4e2;
+ end
+
+ 12:
+ begin
+ tmp_K = 64'h72be5d74f27b896f;
+ end
+
+ 13:
+ begin
+ tmp_K = 64'h80deb1fe3b1696b1;
+ end
+
+ 14:
+ begin
+ tmp_K = 64'h9bdc06a725c71235;
+ end
+
+ 15:
+ begin
+ tmp_K = 64'hc19bf174cf692694;
+ end
+
+ 16:
+ begin
+ tmp_K = 64'he49b69c19ef14ad2;
+ end
+
+ 17:
+ begin
+ tmp_K = 64'hefbe4786384f25e3;
+ end
+
+ 18:
+ begin
+ tmp_K = 64'h0fc19dc68b8cd5b5;
+ end
+
+ 19:
+ begin
+ tmp_K = 64'h240ca1cc77ac9c65;
+ end
+
+ 20:
+ begin
+ tmp_K = 64'h2de92c6f592b0275;
+ end
+
+ 21:
+ begin
+ tmp_K = 64'h4a7484aa6ea6e483;
+ end
+
+ 22:
+ begin
+ tmp_K = 64'h5cb0a9dcbd41fbd4;
+ end
+
+ 23:
+ begin
+ tmp_K = 64'h76f988da831153b5;
+ end
+
+ 24:
+ begin
+ tmp_K = 64'h983e5152ee66dfab;
+ end
+
+ 25:
+ begin
+ tmp_K = 64'ha831c66d2db43210;
+ end
+
+ 26:
+ begin
+ tmp_K = 64'hb00327c898fb213f;
+ end
+
+ 27:
+ begin
+ tmp_K = 64'hbf597fc7beef0ee4;
+ end
+
+ 28:
+ begin
+ tmp_K = 64'hc6e00bf33da88fc2;
+ end
+
+ 29:
+ begin
+ tmp_K = 64'hd5a79147930aa725;
+ end
+
+ 30:
+ begin
+ tmp_K = 64'h06ca6351e003826f;
+ end
+
+ 31:
+ begin
+ tmp_K = 64'h142929670a0e6e70;
+ end
+
+ 32:
+ begin
+ tmp_K = 64'h27b70a8546d22ffc;
+ end
+
+ 33:
+ begin
+ tmp_K = 64'h2e1b21385c26c926;
+ end
+
+ 34:
+ begin
+ tmp_K = 64'h4d2c6dfc5ac42aed;
+ end
+
+ 35:
+ begin
+ tmp_K = 64'h53380d139d95b3df;
+ end
+
+ 36:
+ begin
+ tmp_K = 64'h650a73548baf63de;
+ end
+
+ 37:
+ begin
+ tmp_K = 64'h766a0abb3c77b2a8;
+ end
+
+ 38:
+ begin
+ tmp_K = 64'h81c2c92e47edaee6;
+ end
+
+ 39:
+ begin
+ tmp_K = 64'h92722c851482353b;
+ end
+
+ 40:
+ begin
+ tmp_K = 64'ha2bfe8a14cf10364;
+ end
+
+ 41:
+ begin
+ tmp_K = 64'ha81a664bbc423001;
+ end
+
+ 42:
+ begin
+ tmp_K = 64'hc24b8b70d0f89791;
+ end
+
+ 43:
+ begin
+ tmp_K = 64'hc76c51a30654be30;
+ end
+
+ 44:
+ begin
+ tmp_K = 64'hd192e819d6ef5218;
+ end
+
+ 45:
+ begin
+ tmp_K = 64'hd69906245565a910;
+ end
+
+ 46:
+ begin
+ tmp_K = 64'hf40e35855771202a;
+ end
+
+ 47:
+ begin
+ tmp_K = 64'h106aa07032bbd1b8;
+ end
+
+ 48:
+ begin
+ tmp_K = 64'h19a4c116b8d2d0c8;
+ end
+
+ 49:
+ begin
+ tmp_K = 64'h1e376c085141ab53;
+ end
+
+ 50:
+ begin
+ tmp_K = 64'h2748774cdf8eeb99;
+ end
+
+ 51:
+ begin
+ tmp_K = 64'h34b0bcb5e19b48a8;
+ end
+
+ 52:
+ begin
+ tmp_K = 64'h391c0cb3c5c95a63;
+ end
+
+ 53:
+ begin
+ tmp_K = 64'h4ed8aa4ae3418acb;
+ end
+
+ 54:
+ begin
+ tmp_K = 64'h5b9cca4f7763e373;
+ end
+
+ 55:
+ begin
+ tmp_K = 64'h682e6ff3d6b2b8a3;
+ end
+
+ 56:
+ begin
+ tmp_K = 64'h748f82ee5defb2fc;
+ end
+
+ 57:
+ begin
+ tmp_K = 64'h78a5636f43172f60;
+ end
+
+ 58:
+ begin
+ tmp_K = 64'h84c87814a1f0ab72;
+ end
+
+ 59:
+ begin
+ tmp_K = 64'h8cc702081a6439ec;
+ end
+
+ 60:
+ begin
+ tmp_K = 64'h90befffa23631e28;
+ end
+
+ 61:
+ begin
+ tmp_K = 64'ha4506cebde82bde9;
+ end
+
+ 62:
+ begin
+ tmp_K = 64'hbef9a3f7b2c67915;
+ end
+
+ 63:
+ begin
+ tmp_K = 64'hc67178f2e372532b;
+ end
+
+ 64:
+ begin
+ tmp_K = 64'hca273eceea26619c;
+ end
+
+ 65:
+ begin
+ tmp_K = 64'hd186b8c721c0c207;
+ end
+
+ 66:
+ begin
+ tmp_K = 64'heada7dd6cde0eb1e;
+ end
+
+ 67:
+ begin
+ tmp_K = 64'hf57d4f7fee6ed178;
+ end
+
+ 68:
+ begin
+ tmp_K = 64'h06f067aa72176fba;
+ end
+
+ 69:
+ begin
+ tmp_K = 64'h0a637dc5a2c898a6;
+ end
+
+ 70:
+ begin
+ tmp_K = 64'h113f9804bef90dae;
+ end
+
+ 71:
+ begin
+ tmp_K = 64'h1b710b35131c471b;
+ end
+
+ 72:
+ begin
+ tmp_K = 64'h28db77f523047d84;
+ end
+
+ 73:
+ begin
+ tmp_K = 64'h32caab7b40c72493;
+ end
+
+ 74:
+ begin
+ tmp_K = 64'h3c9ebe0a15c9bebc;
+ end
+
+ 75:
+ begin
+ tmp_K = 64'h431d67c49c100d4c;
+ end
+
+ 76:
+ begin
+ tmp_K = 64'h4cc5d4becb3e42b6;
+ end
+
+ 77:
+ begin
+ tmp_K = 64'h597f299cfc657e2a;
+ end
+
+ 78:
+ begin
+ tmp_K = 64'h5fcb6fab3ad6faec;
+ end
+
+ 79:
+ begin
+ tmp_K = 64'h6c44198c4a475817;
+ end
+
+ default:
+ begin
+ tmp_K = 64'h0000000000000000;
+ end
+ endcase // case (addr)
+ end // block: addr_mux
+endmodule // sha512_k_constants
+
+//======================================================================
+// sha512_k_constants.v
+//======================================================================
diff --git a/src/rtl/sha512_w_mem.v b/src/rtl/sha512_w_mem.v
new file mode 100644
index 0000000..57e6d68
--- /dev/null
+++ b/src/rtl/sha512_w_mem.v
@@ -0,0 +1,346 @@
+//======================================================================
+//
+// sha512_w_mem_regs.v
+// -------------------
+// The W memory for the SHA-512 core. This version uses 16
+// 32-bit registers as a sliding window to generate the 64 words.
+//
+//
+// Author: Joachim Strombergson
+// Copyright (c) 2014 Secworks Sweden AB
+// 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,
+// 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.
+//
+//======================================================================
+
+module sha512_w_mem(
+ input wire clk,
+ input wire reset_n,
+
+ input wire [1023 : 0] block,
+
+ input wire init,
+ input wire next,
+ output wire [63 : 0] w
+ );
+
+
+ //----------------------------------------------------------------
+ // Internal constant and parameter definitions.
+ //----------------------------------------------------------------
+ parameter CTRL_IDLE = 1'b0;
+ parameter CTRL_UPDATE = 1'b1;
+
+
+ //----------------------------------------------------------------
+ // Registers including update variables and write enable.
+ //----------------------------------------------------------------
+ reg [63 : 0] w_mem [0 : 15];
+ reg [63 : 0] w_mem00_new;
+ reg [63 : 0] w_mem01_new;
+ reg [63 : 0] w_mem02_new;
+ reg [63 : 0] w_mem03_new;
+ reg [63 : 0] w_mem04_new;
+ reg [63 : 0] w_mem05_new;
+ reg [63 : 0] w_mem06_new;
+ reg [63 : 0] w_mem07_new;
+ reg [63 : 0] w_mem08_new;
+ reg [63 : 0] w_mem09_new;
+ reg [63 : 0] w_mem10_new;
+ reg [63 : 0] w_mem11_new;
+ reg [63 : 0] w_mem12_new;
+ reg [63 : 0] w_mem13_new;
+ reg [63 : 0] w_mem14_new;
+ reg [63 : 0] w_mem15_new;
+ reg w_mem_we;
+
+ reg [6 : 0] w_ctr_reg;
+ reg [6 : 0] w_ctr_new;
+ reg w_ctr_we;
+ reg w_ctr_inc;
+ reg w_ctr_rst;
+
+ reg sha512_w_mem_ctrl_reg;
+ reg sha512_w_mem_ctrl_new;
+ reg sha512_w_mem_ctrl_we;
+
+
+ //----------------------------------------------------------------
+ // Wires.
+ //----------------------------------------------------------------
+ reg [63 : 0] w_tmp;
+ reg [63 : 0] w_new;
+
+
+ //----------------------------------------------------------------
+ // Concurrent connectivity for ports etc.
+ //----------------------------------------------------------------
+ assign w = w_tmp;
+
+
+ //----------------------------------------------------------------
+ // reg_update
+ // Update functionality for all registers in the core.
+ // All registers are positive edge triggered with synchronous
+ // active low reset. All registers have write enable.
+ //----------------------------------------------------------------
+ always @ (posedge clk)
+ begin : reg_update
+ if (!reset_n)
+ begin
+ w_mem[00] <= 64'h0000000000000000;
+ w_mem[01] <= 64'h0000000000000000;
+ w_mem[02] <= 64'h0000000000000000;
+ w_mem[03] <= 64'h0000000000000000;
+ w_mem[04] <= 64'h0000000000000000;
+ w_mem[05] <= 64'h0000000000000000;
+ w_mem[06] <= 64'h0000000000000000;
+ w_mem[07] <= 64'h0000000000000000;
+ w_mem[08] <= 64'h0000000000000000;
+ w_mem[09] <= 64'h0000000000000000;
+ w_mem[10] <= 64'h0000000000000000;
+ w_mem[11] <= 64'h0000000000000000;
+ w_mem[12] <= 64'h0000000000000000;
+ w_mem[13] <= 64'h0000000000000000;
+ w_mem[14] <= 64'h0000000000000000;
+ w_mem[15] <= 64'h0000000000000000;
+ w_ctr_reg <= 7'h00;
+ sha512_w_mem_ctrl_reg <= CTRL_IDLE;
+ end
+ else
+ begin
+ if (w_mem_we)
+ begin
+ w_mem[00] <= w_mem00_new;
+ w_mem[01] <= w_mem01_new;
+ w_mem[02] <= w_mem02_new;
+ w_mem[03] <= w_mem03_new;
+ w_mem[04] <= w_mem04_new;
+ w_mem[05] <= w_mem05_new;
+ w_mem[06] <= w_mem06_new;
+ w_mem[07] <= w_mem07_new;
+ w_mem[08] <= w_mem08_new;
+ w_mem[09] <= w_mem09_new;
+ w_mem[10] <= w_mem10_new;
+ w_mem[11] <= w_mem11_new;
+ w_mem[12] <= w_mem12_new;
+ w_mem[13] <= w_mem13_new;
+ w_mem[14] <= w_mem14_new;
+ w_mem[15] <= w_mem15_new;
+ end
+
+ if (w_ctr_we)
+ begin
+ w_ctr_reg <= w_ctr_new;
+ end
+
+ if (sha512_w_mem_ctrl_we)
+ begin
+ sha512_w_mem_ctrl_reg <= sha512_w_mem_ctrl_new;
+ end
+ end
+ end // reg_update
+
+
+ //----------------------------------------------------------------
+ // select_w
+ //
+ // Mux for the external read operation. This is where we exract
+ // the W variable.
+ //----------------------------------------------------------------
+ always @*
+ begin : select_w
+ if (w_ctr_reg < 16)
+ begin
+ w_tmp = w_mem[w_ctr_reg[3 : 0]];
+ end
+ else
+ begin
+ w_tmp = w_new;
+ end
+ end // select_w
+
+
+ //----------------------------------------------------------------
+ // w_new_logic
+ //
+ // Logic that calculates the next value to be inserted into
+ // the sliding window of the memory.
+ //----------------------------------------------------------------
+ always @*
+ begin : w_mem_update_logic
+ reg [63 : 0] w_0;
+ reg [63 : 0] w_1;
+ reg [63 : 0] w_9;
+ reg [63 : 0] w_14;
+ reg [63 : 0] d0;
+ reg [63 : 0] d1;
+
+ w_mem00_new = 64'h0000000000000000;
+ w_mem01_new = 64'h0000000000000000;
+ w_mem02_new = 64'h0000000000000000;
+ w_mem03_new = 64'h0000000000000000;
+ w_mem04_new = 64'h0000000000000000;
+ w_mem05_new = 64'h0000000000000000;
+ w_mem06_new = 64'h0000000000000000;
+ w_mem07_new = 64'h0000000000000000;
+ w_mem08_new = 64'h0000000000000000;
+ w_mem09_new = 64'h0000000000000000;
+ w_mem10_new = 64'h0000000000000000;
+ w_mem11_new = 64'h0000000000000000;
+ w_mem12_new = 64'h0000000000000000;
+ w_mem13_new = 64'h0000000000000000;
+ w_mem14_new = 64'h0000000000000000;
+ w_mem15_new = 64'h0000000000000000;
+ w_mem_we = 0;
+
+ w_0 = w_mem[0];
+ w_1 = w_mem[1];
+ w_9 = w_mem[9];
+ w_14 = w_mem[14];
+
+ d0 = {w_1[0], w_1[63 : 1]} ^ // ROTR1
+ {w_1[7 : 0], w_1[63 : 8]} ^ // ROTR8
+ {7'b0000000, w_1[63 : 7]}; // SHR7
+
+ d1 = {w_14[18 : 0], w_14[63 : 19]} ^ // ROTR19
+ {w_14[60 : 0], w_14[63 : 61]} ^ // ROTR61
+ {6'b000000, w_14[63 : 6]}; // SHR6
+
+ w_new = w_0 + d0 + w_9 + d1;
+
+ if (init)
+ begin
+ w_mem00_new = block[1023 : 960];
+ w_mem01_new = block[959 : 896];
+ w_mem02_new = block[895 : 832];
+ w_mem03_new = block[831 : 768];
+ w_mem04_new = block[767 : 704];
+ w_mem05_new = block[703 : 640];
+ w_mem06_new = block[639 : 576];
+ w_mem07_new = block[575 : 512];
+ w_mem08_new = block[511 : 448];
+ w_mem09_new = block[447 : 384];
+ w_mem10_new = block[383 : 320];
+ w_mem11_new = block[319 : 256];
+ w_mem12_new = block[255 : 192];
+ w_mem13_new = block[191 : 128];
+ w_mem14_new = block[127 : 64];
+ w_mem15_new = block[63 : 0];
+ w_mem_we = 1;
+ end
+ else if (w_ctr_reg > 15)
+ begin
+ w_mem00_new = w_mem[01];
+ w_mem01_new = w_mem[02];
+ w_mem02_new = w_mem[03];
+ w_mem03_new = w_mem[04];
+ w_mem04_new = w_mem[05];
+ w_mem05_new = w_mem[06];
+ w_mem06_new = w_mem[07];
+ w_mem07_new = w_mem[08];
+ w_mem08_new = w_mem[09];
+ w_mem09_new = w_mem[10];
+ w_mem10_new = w_mem[11];
+ w_mem11_new = w_mem[12];
+ w_mem12_new = w_mem[13];
+ w_mem13_new = w_mem[14];
+ w_mem14_new = w_mem[15];
+ w_mem15_new = w_new;
+ w_mem_we = 1;
+ end
+ end // w_mem_update_logic
+
+
+ //----------------------------------------------------------------
+ // w_ctr
+ // W schedule adress counter. Counts from 0x10 to 0x3f and
+ // is used to expand the block into words.
+ //----------------------------------------------------------------
+ always @*
+ begin : w_ctr
+ w_ctr_new = 0;
+ w_ctr_we = 0;
+
+ if (w_ctr_rst)
+ begin
+ w_ctr_new = 7'h00;
+ w_ctr_we = 1;
+ end
+
+ if (w_ctr_inc)
+ begin
+ w_ctr_new = w_ctr_reg + 7'h01;
+ w_ctr_we = 1;
+ end
+ end // w_ctr
+
+
+ //----------------------------------------------------------------
+ // sha512_w_mem_fsm
+ // Logic for the w shedule FSM.
+ //----------------------------------------------------------------
+ always @*
+ begin : sha512_w_mem_fsm
+ w_ctr_rst = 0;
+ w_ctr_inc = 0;
+
+ sha512_w_mem_ctrl_new = CTRL_IDLE;
+ sha512_w_mem_ctrl_we = 0;
+
+ case (sha512_w_mem_ctrl_reg)
+ CTRL_IDLE:
+ begin
+ if (init)
+ begin
+ w_ctr_rst = 1;
+ sha512_w_mem_ctrl_new = CTRL_UPDATE;
+ sha512_w_mem_ctrl_we = 1;
+ end
+ end
+
+ CTRL_UPDATE:
+ begin
+ if (next)
+ begin
+ w_ctr_inc = 1;
+ end
+
+ if (w_ctr_reg == 6'h3f)
+ begin
+ sha512_w_mem_ctrl_new = CTRL_IDLE;
+ sha512_w_mem_ctrl_we = 1;
+ end
+ end
+ endcase // case (sha512_ctrl_reg)
+ end // sha512_ctrl_fsm
+
+endmodule // sha512_w_mem
+
+//======================================================================
+// sha512_w_mem.v
+//======================================================================
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