transactor.vhd

-- Top level for the ipbus transactor module
--
-- Handles the decoding of ipbus packets and the transactions
-- on the bus itself,
--
-- This is the new version for ipbus 2.0
--
-- Dave Newbold, October 2012
 
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; 

library work;
use work.ipbus.all;
use work.ipbus_trans_decl.all;

entity transactor is
    port(
        clk: in std_logic; -- IPbus clock
        rst: in std_logic; -- Sync reset
        ipb_out: out ipb_wbus; -- IPbus bus signals
        ipb_in: in ipb_rbus;
        ipb_req: out std_logic; -- Bus arbitrator signals
        ipb_grant: in std_logic;
        trans_in: in ipbus_trans_in; -- Interface to packet buffers
        trans_out: out ipbus_trans_out;
        cfg_vector_in: in std_logic_vector(127 downto 0);
        cfg_vector_out: out std_logic_vector(127 downto 0);
        pkt_rx: out std_logic; -- 'Activity LED' lines (need stretching externally)
        pkt_tx: out std_logic
    );
        
end transactor;

architecture rtl of transactor is

    signal rx_data, tx_data: std_logic_vector(31 downto 0);
  signal rx_ready, rx_next, tx_we, tx_hdr, tx_err: std_logic;
  signal cfg_we: std_logic;
  signal cfg_addr: std_logic_vector(1 downto 0);
  signal cfg_din, cfg_dout: std_logic_vector(31 downto 0);

begin

    iface: entity work.transactor_if
        port map(
            clk  => clk,
            rst  => rst,
            trans_in  => trans_in,
            trans_out  => trans_out,
            ipb_req  => ipb_req,
            ipb_grant  => ipb_grant,
            rx_ready  => rx_ready,
            rx_next  => rx_next,
            rx_data  => rx_data,
            tx_data  => tx_data,
            tx_we  => tx_we,
            tx_hdr  => tx_hdr,
            tx_err  => tx_err,
            pkt_rx  => pkt_rx,
            pkt_tx  => pkt_tx
        );
    
    sm: entity work.transactor_sm
        port map(
            clk  => clk,
            rst  => rst,
            rx_data  => rx_data,
            rx_ready  => rx_ready,
            rx_next  => rx_next,
            tx_data  => tx_data,
            tx_we  => tx_we,
            tx_hdr  => tx_hdr,
            tx_err  => tx_err,
            ipb_out  => ipb_out,
            ipb_in  => ipb_in,
            cfg_we  => cfg_we,
            cfg_addr  => cfg_addr,
            cfg_din  => cfg_dout,
            cfg_dout  => cfg_din
        );

    cfg: entity work.transactor_cfg
        port map(
            clk  => clk,
            rst  => rst,
            we  => cfg_we ,
            addr  => cfg_addr,
            din  => cfg_din,
            dout  => cfg_dout,
            vec_in  => cfg_vector_in,
            vec_out  => cfg_vector_out 
        );    

end rtl;