|
|
------------------------------------------------------------------------------
|
|
|
-- This file is a part of the GRLIB VHDL IP LIBRARY
|
|
|
-- Copyright (C) 2003 - 2008, Gaisler Research
|
|
|
-- Copyright (C) 2008 - 2010, Aeroflex Gaisler
|
|
|
--
|
|
|
-- This program is free software; you can redistribute it and/or modify
|
|
|
-- it under the terms of the GNU General Public License as published by
|
|
|
-- the Free Software Foundation; either version 2 of the License, or
|
|
|
-- (at your option) any later version.
|
|
|
--
|
|
|
-- This program is distributed in the hope that it will be useful,
|
|
|
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
-- GNU General Public License for more details.
|
|
|
--
|
|
|
-- You should have received a copy of the GNU General Public License
|
|
|
-- along with this program; if not, write to the Free Software
|
|
|
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
--============================================================================--
|
|
|
-- Design unit : DMA2AHB_Package (package declaration)
|
|
|
--
|
|
|
-- File name : dma2ahb_pkg.vhd
|
|
|
--
|
|
|
-- Purpose : Interface package for AMBA AHB master interface with DMA input
|
|
|
--
|
|
|
-- Reference : AMBA(TM) Specification (Rev 2.0), ARM IHI 0011A,
|
|
|
-- 13th May 1999, issue A, first release, ARM Limited
|
|
|
-- The document can be retrieved from http://www.arm.com
|
|
|
-- AMBA is a trademark of ARM Limited.
|
|
|
-- ARM is a registered trademark of ARM Limited.
|
|
|
--
|
|
|
-- Note : Naming convention according to AMBA(TM) Specification:
|
|
|
-- Signal names are in upper case, except for the following:
|
|
|
-- A lower case 'n' in the name indicates that the signal
|
|
|
-- is active low.
|
|
|
-- Constant names are in upper case.
|
|
|
-- The least significant bit of an array is located to the right,
|
|
|
-- carrying the index number zero.
|
|
|
--
|
|
|
-- Limitations : See DMA2AHB VHDL core
|
|
|
--
|
|
|
-- Library : gaisler
|
|
|
--
|
|
|
-- Authors : Aeroflex Gaisler AB
|
|
|
--
|
|
|
-- Contact : mailto:support@gaisler.com
|
|
|
-- http://www.gaisler.com
|
|
|
--
|
|
|
-- Disclaimer : All information is provided "as is", there is no warranty that
|
|
|
-- the information is correct or suitable for any purpose,
|
|
|
-- neither implicit nor explicit.
|
|
|
--
|
|
|
--------------------------------------------------------------------------------
|
|
|
-- Version Author Date Changes
|
|
|
--
|
|
|
-- 1.4 SH 1 Jul 2005 Support for fixed length incrementing bursts
|
|
|
-- Support for record types
|
|
|
-- 1.5 SH 1 Sep 2005 New library gaisler
|
|
|
-- 1.6 SH 20 Sep 2005 Added transparent HSIZE support
|
|
|
-- 1.7 SH 6 Dec 2007 Added syncrst generic
|
|
|
--------------------------------------------------------------------------------
|
|
|
library ieee;
|
|
|
use ieee.std_logic_1164.all;
|
|
|
|
|
|
library grlib;
|
|
|
use grlib.amba.all;
|
|
|
|
|
|
package DMA2AHB_Package is
|
|
|
-----------------------------------------------------------------------------
|
|
|
-- Direct Memory Access to AMBA AHB Master Interface Types
|
|
|
-----------------------------------------------------------------------------
|
|
|
type DMA_In_Type is record
|
|
|
Reset: Std_Logic;
|
|
|
Address: Std_Logic_Vector(32-1 downto 0);
|
|
|
Data: Std_Logic_Vector(32-1 downto 0);
|
|
|
Request: Std_Logic; -- access requested
|
|
|
Burst: Std_Logic; -- burst requested
|
|
|
Beat: Std_Logic_Vector(1 downto 0); -- incrementing beat
|
|
|
Size: Std_Logic_Vector(1 downto 0); -- size
|
|
|
Store: Std_Logic; -- data write requested
|
|
|
Lock: Std_Logic; -- locked Transfer
|
|
|
end record;
|
|
|
|
|
|
type DMA_Out_Type is record
|
|
|
Grant: Std_Logic; -- access accepted
|
|
|
OKAY: Std_Logic; -- write access ready
|
|
|
Ready: Std_Logic; -- read data ready
|
|
|
Retry: Std_Logic; -- retry
|
|
|
Fault: Std_Logic; -- error occured
|
|
|
Data: Std_Logic_Vector(32-1 downto 0);
|
|
|
end record;
|
|
|
|
|
|
-- constants for HBURST definition (used with dma_in_type.Beat)
|
|
|
constant HINCR: Std_Logic_Vector(1 downto 0) := "00";
|
|
|
constant HINCR4: Std_Logic_Vector(1 downto 0) := "01";
|
|
|
constant HINCR8: Std_Logic_Vector(1 downto 0) := "10";
|
|
|
constant HINCR16: Std_Logic_Vector(1 downto 0) := "11";
|
|
|
|
|
|
-- constants for HSIZE definition (used with dma_in_type.Size)
|
|
|
constant HSIZE8: Std_Logic_Vector(1 downto 0) := "00";
|
|
|
constant HSIZE16: Std_Logic_Vector(1 downto 0) := "01";
|
|
|
constant HSIZE32: Std_Logic_Vector(1 downto 0) := "10";
|
|
|
|
|
|
-----------------------------------------------------------------------------
|
|
|
-- Direct Memory Access to AMBA AHB Master Interface
|
|
|
-----------------------------------------------------------------------------
|
|
|
component DMA2AHB is
|
|
|
generic(
|
|
|
hindex: in Integer := 0;
|
|
|
vendorid: in Integer := 0;
|
|
|
deviceid: in Integer := 0;
|
|
|
version: in Integer := 0;
|
|
|
syncrst: in Integer := 1;
|
|
|
boundary: in Integer := 1);
|
|
|
port(
|
|
|
-- AMBA AHB system signals
|
|
|
HCLK: in Std_ULogic;
|
|
|
HRESETn: in Std_ULogic;
|
|
|
|
|
|
-- Direct Memory Access Interface
|
|
|
DMAIn: in DMA_In_Type;
|
|
|
DMAOut: out DMA_OUt_Type;
|
|
|
|
|
|
-- AMBA AHB Master Interface
|
|
|
AHBIn: in AHB_Mst_In_Type;
|
|
|
AHBOut: out AHB_Mst_Out_Type);
|
|
|
end component DMA2AHB;
|
|
|
end package DMA2AHB_Package; --===============================================--
|
|
|
|
