Subversion Repositories scarts

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

-- This file is part of SCARTS.

-- 

-- SCARTS 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 3 of the License, or

-- (at your option) any later version.

-- 

-- SCARTS 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 SCARTS.  If not, see <http://www.gnu.org/licenses/>.

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

library ieee;

use ieee.std_logic_1164.all;

package scarts_amba_pkg is

  constant MAX_AHB_IRQ    : integer := 8;   -- maximum interrupts

  constant HSIZE_BYTE:    std_logic_vector(2 downto 0) := "000";

  constant HSIZE_HWORD:   std_logic_vector(2 downto 0) := "001";

  constant HSIZE_WORD:    std_logic_vector(2 downto 0) := "010";

  constant HSIZE_DWORD:   std_logic_vector(2 downto 0) := "011";

  constant HSIZE_4WORD:   std_logic_vector(2 downto 0) := "100";

  constant HSIZE_8WORD:   std_logic_vector(2 downto 0) := "101";

  constant HSIZE_16WORD:  std_logic_vector(2 downto 0) := "110";

  constant HSIZE_32WORD:  std_logic_vector(2 downto 0) := "111";

  constant HRESP_OKAY:    std_logic_vector(1 downto 0) := "00";

  constant HRESP_ERROR:   std_logic_vector(1 downto 0) := "01";

  constant HRESP_RETRY:   std_logic_vector(1 downto 0) := "10";

  constant HRESP_SPLIT:   std_logic_vector(1 downto 0) := "11";

  constant HBURST_SINGLE: std_logic_vector(2 downto 0) := "000";

  constant HBURST_INCR:   std_logic_vector(2 downto 0) := "001";

  constant HBURST_WRAP4:  std_logic_vector(2 downto 0) := "010";

  constant HBURST_INCR4:  std_logic_vector(2 downto 0) := "011";

  constant HBURST_WRAP8:  std_logic_vector(2 downto 0) := "100";

  constant HBURST_INCR8:  std_logic_vector(2 downto 0) := "101";

  constant HBURST_WRAP16: std_logic_vector(2 downto 0) := "110";

  constant HBURST_INCR16: std_logic_vector(2 downto 0) := "111";

  constant HTRANS_IDLE:   std_logic_vector(1 downto 0) := "00";

  constant HTRANS_BUSY:   std_logic_vector(1 downto 0) := "01";

  constant HTRANS_NONSEQ: std_logic_vector(1 downto 0) := "10";

  constant HTRANS_SEQ:    std_logic_vector(1 downto 0) := "11";

  -- AHB master inputs (based on AMBA 2.0 specification)

  type ahb_master_in_type is record

    hgrant      : std_logic;

    hready      : std_ulogic;

    hresp       : std_logic_vector(1 downto 0);

    hrdata      : std_logic_vector(31 downto 0);

    hirq        : std_logic_vector(MAX_AHB_IRQ-1 downto 0); -- interrupt bus   

  end record;

  constant AMBA_MASTER_IN_VOID : ahb_master_in_type := ('0', '0',

                                                        (others => '0'),

                                                        (others => '0'),

                                                        (others => '0'));

  -- AHB master outputs (based on AMBA 2.0 specification) 

  type ahb_master_out_type is record

    hbusreq     : std_ulogic;

    hlock       : std_ulogic;

    htrans      : std_logic_vector(1 downto 0);

    haddr       : std_logic_vector(31 downto 0);

    hwrite      : std_ulogic;

    hsize       : std_logic_vector(2 downto 0);

    hburst      : std_logic_vector(2 downto 0);

    hprot       : std_logic_vector(3 downto 0);

    hwdata      : std_logic_vector(31 downto 0);

  end record;

  constant AMBA_MASTER_OUT_VOID : ahb_master_out_type := ('0', '0', (others => '0'),

                                                          (others => '0'), '0',

                                                          (others => '0'),

                                                          (others => '0'),

                                                          (others => '0'),

                                                          (others => '0'));

end scarts_amba_pkg;