Initial commit of base point multiplier core for ECDSA curve P-256.

1 files changed, 101 insertions, 0 deletions

diff --git a/rtl/util/bram_1rw_1ro_readfirst.v b/rtl/util/bram_1rw_1ro_readfirst.v
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+++ b/rtl/util/bram_1rw_1ro_readfirst.v
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+//======================================================================
+//
+// Copyright (c) 2015, NORDUnet A/S All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// - Redistributions of source code must retain the above copyright
+//   notice, this list of conditions and the following disclaimer.
+//
+// - 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.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may
+//   be used to endorse or promote products derived from this software
+//   without specific prior written permission.
+//
+// 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
+// HOLDER 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.
+//
+//======================================================================
+
+`timescale 1ns / 1ps
+
+module bram_1rw_1ro_readfirst
+  #(parameter MEM_WIDTH            = 32,
+    parameter MEM_ADDR_BITS        = 8)
+   (
+    input wire                     clk,
+
+    input wire [MEM_ADDR_BITS-1:0] a_addr,
+    input wire                     a_wr,
+    input wire [MEM_WIDTH-1:0]     a_in,
+    output wire [MEM_WIDTH-1:0]    a_out,
+
+    input wire [MEM_ADDR_BITS-1:0] b_addr,
+    output wire [MEM_WIDTH-1:0]    b_out
+    );
+
+
+   //
+   // BRAM
+   //
+   (* RAM_STYLE="BLOCK" *)
+   reg [MEM_WIDTH-1:0]             bram[0:(2**MEM_ADDR_BITS)-1];

+	

+	

+	//

+	// Initialization

+	//

+	/**

+	integer c;

+	initial begin

+		for (c=0; c<(2**MEM_ADDR_BITS); c=c+1)

+			bram[c] = {MEM_WIDTH{1'b0}};

+	end

+	**/

+	
+
+
+   //
+   // Output Registers
+   //
+   reg [MEM_WIDTH-1:0]             bram_reg_a;
+   reg [MEM_WIDTH-1:0]             bram_reg_b;
+
+   assign a_out = bram_reg_a;
+   assign b_out = bram_reg_b;
+
+
+   //
+   // Read-Write Port A
+   //
+   always @(posedge clk) begin
+      //
+      bram_reg_a <= bram[a_addr];
+      //
+      if (a_wr) bram[a_addr] <= a_in;
+      //
+   end
+
+
+   //
+   // Read-Only Port B
+   //
+   always @(posedge clk)
+     //
+     bram_reg_b <= bram[b_addr];
+
+
+endmodule