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-----------------------------------------------------------------------
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---- ----
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---- Present - a lightweight block cipher project ----
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---- ----
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---- This file is part of the Present - a lightweight block ----
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---- cipher project ----
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---- http://www.http://opencores.org/project,present ----
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---- ----
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---- Description: ----
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---- This file contains types and constant used by this ----
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---- implementation of Present project ----
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---- To Do: ----
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---- ----
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---- Author(s): ----
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---- - Krzysztof Gajewski, gajos@opencores.org ----
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---- k.gajewski@gmail.com ----
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---- ----
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-----------------------------------------------------------------------
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---- ----
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---- Copyright (C) 2013 Authors and OPENCORES.ORG ----
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---- ----
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---- This source file may be used and distributed without ----
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---- restriction provided that this copyright statement is not ----
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---- removed from the file and that any derivative work contains ----
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---- the original copyright notice and the associated disclaimer. ----
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---- ----
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---- This source file is free software; you can redistribute it ----
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---- and-or modify it under the terms of the GNU Lesser General ----
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---- Public License as published by the Free Software Foundation; ----
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---- either version 2.1 of the License, or (at your option) any ----
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---- later version. ----
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---- ----
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---- This source is distributed in the hope that it will be ----
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---- useful, but WITHOUT ANY WARRANTY; without even the implied ----
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---- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ----
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---- PURPOSE. See the GNU Lesser General Public License for more ----
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---- details. ----
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---- ----
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---- You should have received a copy of the GNU Lesser General ----
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---- Public License along with this source; if not, download it ----
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---- from http://www.opencores.org/lgpl.shtml ----
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---- ----
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-----------------------------------------------------------------------
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-- Package File Template
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--
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-- Purpose: This package defines supplemental types, subtypes,
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-- constants, and functions
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library IEEE;
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use IEEE.STD_LOGIC_1164.all;
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package kody is
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-- type for PresentStateMachine to control the datapath & circuit --
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type stany is (NOP, RDK1, RDK2, RDK3, RDT1, RDT2, COD, CTO1, CTO2);
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-- constant as control command from input --
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constant cnop : std_logic_vector(3 downto 0) := "0000"; --0 no operations
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constant cdec : std_logic_vector(3 downto 0) := "0001"; --1 decode text
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constant crdk1 : std_logic_vector(3 downto 0) := "0010"; --2 read key part 1
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constant crdk2 : std_logic_vector(3 downto 0) := "0011"; --3 read key part 2
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constant crdk3 : std_logic_vector(3 downto 0) := "0100"; --4 read key part 3
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constant cmkd : std_logic_vector(3 downto 0) := "0101"; --5 make decrypt key
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constant ccod : std_logic_vector(3 downto 0) := "0110"; --6 code text
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constant crdt1 : std_logic_vector(3 downto 0) := "0111"; --7 read text part 1
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constant crdt2 : std_logic_vector(3 downto 0) := "1000"; --8 read text part 2
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constant ccto1 : std_logic_vector(3 downto 0) := "1001"; --9 ciphertext output part 1 (LSW)
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constant ccto2 : std_logic_vector(3 downto 0) := "1010"; --A ciphertext output part 2 (MSW)
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-- For input registers (early version, now for mux's) --
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constant in_ld_reg_L : std_logic_vector(1 downto 0) := "00"; -- Load low part of the register (64 & 80 bit)
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constant in_ld_reg_H : std_logic_vector(1 downto 0) := "01"; -- Load high part of the register (64 & 80 bit)
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constant in_ld_reg_HH : std_logic_vector(1 downto 0) := "10"; -- Load highest part of the register (80 bit only)
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constant in_reg_Z : std_logic_vector(1 downto 0) := "11"; -- High impedance on the line (unused - in this design only for block input)
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-- For output register --
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constant out_ld_reg : std_logic_vector(1 downto 0) := "00"; -- Load the output register
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constant out_reg_L : std_logic_vector(1 downto 0) := "01"; -- send low part of the register to the output
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constant out_reg_H : std_logic_vector(1 downto 0) := "10"; -- senf high part of the register to the output
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constant out_reg_Z : std_logic_vector(1 downto 0) := "11"; -- High impedance on the line (unused - in this design only for block input)
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end kody;
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