-- Copyright (c)2006, Jeremy Seth Henry
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-- Copyright (c)2006, Jeremy Seth Henry
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-- All rights reserved.
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-- All rights reserved.
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--
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--
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-- Redistribution and use in source and binary forms, with or without
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-- Redistribution and use in source and binary forms, with or without
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-- modification, are permitted provided that the following conditions are met:
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-- modification, are permitted provided that the following conditions are met:
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-- * Redistributions of source code must retain the above copyright
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-- * Redistributions of source code must retain the above copyright
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-- notice, this list of conditions and the following disclaimer.
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-- notice, this list of conditions and the following disclaimer.
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-- * Redistributions in binary form must reproduce the above copyright
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-- * Redistributions in binary form must reproduce the above copyright
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-- notice, this list of conditions and the following disclaimer in the
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-- notice, this list of conditions and the following disclaimer in the
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-- documentation and/or other materials provided with the distribution,
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-- documentation and/or other materials provided with the distribution,
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-- where applicable (as part of a user interface, debugging port, etc.)
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-- where applicable (as part of a user interface, debugging port, etc.)
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--
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--
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-- THIS SOFTWARE IS PROVIDED BY JEREMY SETH HENRY ``AS IS'' AND ANY
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-- THIS SOFTWARE IS PROVIDED BY JEREMY SETH HENRY ``AS IS'' AND ANY
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-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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-- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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-- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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-- DISCLAIMED. IN NO EVENT SHALL JEREMY SETH HENRY BE LIABLE FOR ANY
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-- DISCLAIMED. IN NO EVENT SHALL JEREMY SETH HENRY BE LIABLE FOR ANY
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-- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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-- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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-- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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-- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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-- ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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-- ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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-- VHDL Units : Open8_pkg
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-- VHDL Units : Open8_pkg
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-- Description: Contains constant definitions for the Open8 processor
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-- Description: Contains constant definitions for the Open8 processor
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-- Revision History
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-- Revision History
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-- Author Date Change
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-- Author Date Change
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------------------ -------- ---------------------------------------------------
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------------------ -------- ---------------------------------------------------
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-- Seth Henry 07/22/06 Design Start
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-- Seth Henry 07/22/06 Design Start
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library ieee;
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_1164.all;
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package Open8_pkg is
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package Open8_pkg is
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-- These subtypes can be used with external peripherals to simplify
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-- These subtypes can be used with external peripherals to simplify
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-- connection to the core.
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-- connection to the core.
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subtype ADDRESS_TYPE is std_logic_vector(15 downto 0);
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subtype ADDRESS_TYPE is std_logic_vector(15 downto 0);
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subtype DATA_TYPE is std_logic_vector(7 downto 0);
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subtype DATA_TYPE is std_logic_vector(7 downto 0);
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-- Note: INTERRUPT_BUNDLE must be exactly the same width as DATA_TYPE
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-- Note: INTERRUPT_BUNDLE must be exactly the same width as DATA_TYPE
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subtype INTERRUPT_BUNDLE is DATA_TYPE;
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subtype INTERRUPT_BUNDLE is DATA_TYPE;
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-- Component declaration
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-- Component declaration
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component Open8_CPU is
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component Open8_CPU is
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generic(
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generic(
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Stack_Start_Addr : ADDRESS_TYPE;
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Stack_Start_Addr : ADDRESS_TYPE;
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Allow_Stack_Address_Move : std_logic := '0';
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Allow_Stack_Address_Move : std_logic := '0';
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ISR_Start_Addr : ADDRESS_TYPE;
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ISR_Start_Addr : ADDRESS_TYPE;
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Program_Start_Addr : ADDRESS_TYPE;
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Program_Start_Addr : ADDRESS_TYPE;
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Default_Interrupt_Mask : DATA_TYPE;
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Default_Interrupt_Mask : DATA_TYPE;
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Enable_CPU_Halt : std_logic := '0';
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Enable_CPU_Halt : std_logic := '0';
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Enable_Auto_Increment : std_logic := '0' );
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Enable_Auto_Increment : std_logic := '0' );
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port(
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port(
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Clock : in std_logic;
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Clock : in std_logic;
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Reset_n : in std_logic;
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Reset_n : in std_logic;
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CPU_Halt : in std_logic;
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CPU_Halt : in std_logic;
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Interrupts : in INTERRUPT_BUNDLE;
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Interrupts : in INTERRUPT_BUNDLE;
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Address : out ADDRESS_TYPE;
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Address : out ADDRESS_TYPE;
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Rd_Data : in DATA_TYPE;
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Rd_Data : in DATA_TYPE;
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Rd_Enable : out std_logic;
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Rd_Enable : out std_logic;
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Wr_Data : out DATA_TYPE;
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Wr_Data : out DATA_TYPE;
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Wr_Enable : out std_logic );
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Wr_Enable : out std_logic );
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end component;
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end component;
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end Open8_pkg;
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end Open8_pkg;
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package body Open8_pkg is
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package body Open8_pkg is
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end package body;
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end package body;
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