//------------------------------------------------------------------------------
//
// ecdsa256_banks_array.v
// -----------------------------------------------------------------------------
// ECDSA Operand Banks Array
//
// Authors: Pavel Shatov
//
// Copyright (c) 2018, NORDUnet A/S
//
// 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.
//
//------------------------------------------------------------------------------
module ecdsa256_banks_array
(
input clk,
input banks, // 0: LO -> HI, 1: HI -> LO
input [ 5:0] src1_operand,
input [ 5:0] src2_operand,
input [ 5:0] dst_operand,
input [ 2:0] src1_addr,
input [ 2:0] src2_addr,
input [ 2:0] dst_addr,
input dst_wren,
output [31:0] src1_dout,
output [31:0] src2_dout,
input [31:0] dst_din
);
//
// Banks
//
wire [31:0] bank_lo1_dout;
wire [31:0] bank_lo2_dout;
wire [31:0] bank_hi1_dout;
wire [31:0] bank_hi2_dout;
assign src1_dout = !banks ? bank_lo1_dout : bank_hi1_dout;
assign src2_dout = !banks ? bank_lo2_dout : bank_hi2_dout;
ecdsa256_operand_bank bank_operand_lo1
(
.clk (clk),
.a_addr ({dst_operand, dst_addr}),
.a_wr (dst_wren & banks),
.a_in (dst_din),
.b_addr ({src1_operand, src1_addr}),
.b_out (bank_lo1_dout)
);
ecdsa256_operand_bank bank_operand_lo2
(
.clk (clk),
.a_addr ({dst_operand, dst_addr}),
.a_wr (dst_wren & banks),
.a_in (dst_din),
.b_addr ({src2_operand, src2_addr}),
.b_out (bank_lo2_dout)
);
ecdsa256_operand_bank bank_operand_hi1
(
.clk (clk),
.a_addr ({dst_operand, dst_addr}),
.a_wr (dst_wren & ~banks),
.a_in (dst_din),
.b_addr ({src1_operand, src1_addr}),
.b_out (bank_hi1_dout)
);
ecdsa256_operand_bank bank_operand_hi2
(
.clk (clk),
.a_addr ({dst_operand, dst_addr}),
.a_wr (dst_wren & ~banks),
.a_in (dst_din),
.b_addr ({src2_operand, src2_addr}),
.b_out (bank_hi2_dout)
);
endmodule
//------------------------------------------------------------------------------
// End-of-File
//------------------------------------------------------------------------------
