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-- ZPU
--
-- Copyright 2004-2008 oharboe - yvind Harboe - oyvind.harboe@zylin.com
--
-- The FreeBSD license
--
-- 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 ZPU PROJECT ``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
-- ZPU PROJECT 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.
--
-- The views and conclusions contained in the software and documentation
-- are those of the authors and should not be interpreted as representing
-- official policies, either expressed or implied, of the ZPU Project.
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
library work;
use work.zpu_top_pkg.all;
use work.wishbone_pkg.all;
use work.zpupkg.all;
use work.zpu_config.all;
entity zpu_wb_bridge is
port ( -- Native ZPU interface
clk : in std_logic;
areset : in std_logic;
mem_req : in std_logic;
mem_we : in std_logic;
mem_ack : out std_logic;
mem_read : out std_logic_vector(wordSize-1 downto 0);
mem_write : in std_logic_vector(wordSize-1 downto 0);
out_mem_addr : in std_logic_vector(maxAddrBitIncIO downto 0);
mem_writeMask : in std_logic_vector(wordBytes-1 downto 0);
-- Wishbone from ZPU
zpu_wb_i : in wishbone_bus_out;
zpu_wb_o : out wishbone_bus_in);
end zpu_wb_bridge;
architecture behave of zpu_wb_bridge is
begin
mem_read <= zpu_wb_i.dat;
mem_ack <= zpu_wb_i.ack;
zpu_wb_o.adr <= out_mem_addr;
zpu_wb_o.dat <= mem_write;
zpu_wb_o.sel <= mem_writeMask;
zpu_wb_o.stb <= mem_req;
zpu_wb_o.cyc <= mem_req;
zpu_wb_o.we <= mem_we;
end behave;
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