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--

--      Input file         : config_Pkg.vhd

--      Design name        : config_Pkg

--      Author             : Tamar Kranenburg

--      Company            : Delft University of Technology

--                         : Faculty EEMCS, Department ME&CE

--                         : Systems and Circuits group

--

--      Description        : Configuration parameters for the design

--

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LIBRARY ieee;

USE ieee.std_logic_1164.ALL;

USE ieee.std_logic_unsigned.ALL;

PACKAGE config_Pkg IS

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    -- CORE PARAMETERS

    ----------------------------------------------------------------------------------------------

    -- Implement external interrupt

    CONSTANT CFG_INTERRUPT : boolean := true;      -- Disable or enable external interrupt [0,1]

     -- Implement hardware multiplier

    CONSTANT CFG_USE_HW_MUL : boolean := true;     -- Disable or enable multiplier [0,1]

    -- Implement hardware barrel shifter

    CONSTANT CFG_USE_BARREL : boolean := true;     -- Disable or enable barrel shifter [0,1]

    -- Debug mode

    CONSTANT CFG_DEBUG : boolean := true;          -- Resets some extra registers for better readability

                                                   -- and enables feedback (report) [0,1]

                                                   -- Set CFG_DEBUG to zero to obtain best performance.

    -- Memory parameters

    CONSTANT CFG_DMEM_SIZE  : positive := 32;      -- Data memory bus size in 2LOG # elements

    CONSTANT CFG_IMEM_SIZE  : positive := 16;      -- Instruction memory bus size in 2LOG # elements

    CONSTANT CFG_BYTE_ORDER : boolean := true;     -- Switch between MSB (1, default) and LSB (0) byte order policy

    -- Register parameters

    CONSTANT CFG_REG_FORCE_ZERO : boolean := true; -- Force data to zero if register address is zero [0,1]

    CONSTANT CFG_REG_FWD_WB     : boolean := true; -- Forward writeback to loosen register memory requirements [0,1]

    CONSTANT CFG_MEM_FWD_WB     : boolean := true; -- Forward memory result in stead of introducing stalls [0,1]

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    -- CONSTANTS (currently not configurable / not tested)

    ----------------------------------------------------------------------------------------------

    CONSTANT CFG_DMEM_WIDTH : positive := 32;   -- Data memory width in bits

    CONSTANT CFG_IMEM_WIDTH : positive := 32;   -- Instruction memory width in bits

    CONSTANT CFG_GPRF_SIZE  : positive :=  5;   -- General Purpose Register File Size in 2LOG # elements

    ----------------------------------------------------------------------------------------------

    -- BUS PARAMETERS

    ----------------------------------------------------------------------------------------------

    TYPE memory_map_type IS ARRAY(natural RANGE <>) OF std_ulogic_vector(CFG_DMEM_WIDTH - 1 DOWNTO 0);

    CONSTANT CFG_NUM_SLAVES : positive := 2;

    CONSTANT CFG_MEMORY_MAP : memory_map_type(0 TO CFG_NUM_SLAVES) := (X"00000000", X"00FFFFFF", X"FFFFFFFF");

END config_Pkg;