Subversion Repositories rio

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

-- 

-- RapidIO IP Library Core

-- 

-- This file is part of the RapidIO IP library project

-- http://www.opencores.org/cores/rio/

-- 

-- Description

-- Containing RapidIO packet parsers and generators.

-- 

-- To Do:

-- - Add support for all Request-class packets.

-- - Add support for all Write-class packets.

-- - Add support for Doorbell-class packets.

-- - Add support for Message-class packets.

-- 

-- Author(s): 

-- - Magnus Rosenius, magro732@opencores.org 

-- 

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

-- 

-- Copyright (C) 2014 Authors and OPENCORES.ORG 

-- 

-- This source file may be used and distributed without 

-- restriction provided that this copyright statement is not 

-- removed from the file and that any derivative work contains 

-- the original copyright notice and the associated disclaimer. 

-- 

-- This source file is free software; you can redistribute it 

-- and/or modify it under the terms of the GNU Lesser General 

-- Public License as published by the Free Software Foundation; 

-- either version 2.1 of the License, or (at your option) any 

-- later version. 

-- 

-- This source 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 Lesser General Public License for more 

-- details. 

-- 

-- You should have received a copy of the GNU Lesser General 

-- Public License along with this source; if not, download it 

-- from http://www.opencores.org/lgpl.shtml 

-- 

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

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

-- MaintenanceInbound

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

library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

use work.rio_common.all;

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

-- Entity for MaintenanceInbound.

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

entity MaintenanceInbound is

  generic(

    ENABLE_READ_REQUEST : boolean := true;

    ENABLE_WRITE_REQUEST : boolean := true;

    ENABLE_READ_RESPONSE : boolean := true;

    ENABLE_WRITE_RESPONSE : boolean := true;

    ENABLE_PORT_WRITE : boolean := true);

  port(

    clk : in std_logic;

    areset_n : in std_logic;

    enable : in std_logic;

    readRequestReady_o : out std_logic;

    writeRequestReady_o : out std_logic;

    readResponseReady_o : out std_logic;

    writeResponseReady_o : out std_logic;

    portWriteReady_o : out std_logic;

    vc_o : out std_logic;

    crf_o : out std_logic;

    prio_o : out std_logic_vector(1 downto 0);

    tt_o : out std_logic_vector(1 downto 0);

    dstid_o : out std_logic_vector(31 downto 0);

    srcid_o : out std_logic_vector(31 downto 0);

    size_o : out std_logic_vector(3 downto 0);

    status_o : out std_logic_vector(3 downto 0);

    tid_o : out std_logic_vector(7 downto 0);

    hop_o : out std_logic_vector(7 downto 0);

    offset_o : out std_logic_vector(20 downto 0);

    wdptr_o : out std_logic;

    payloadLength_o : out std_logic_vector(2 downto 0);

    payloadIndex_i : in std_logic_vector(2 downto 0);

    payload_o : out std_logic_vector(63 downto 0);

    done_i : in std_logic;

    inboundStb_i : in std_logic;

    inboundAdr_i : in std_logic_vector(3 downto 0);

    inboundDat_i : in std_logic_vector(31 downto 0);

    inboundStall_o : out std_logic);

end entity;

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

-- Architecture for MaintenanceInbound.

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

architecture MaintenanceInbound of MaintenanceInbound is

  signal busy : std_ulogic;

  signal transaction : std_logic_vector(3 downto 0);

  signal payloadIndex : unsigned(2 downto 0);

  signal packetIndex : natural range 0 to 21;

  signal packetData : std_logic_vector(47 downto 0);

  signal readRequestComplete : std_logic;

  signal writeRequestComplete : std_logic;

  signal readResponseComplete : std_logic;

  signal writeResponseComplete : std_logic;

  signal portWriteComplete : std_logic;

  signal memoryWrite : std_logic;

  signal memoryAddress : std_logic_vector(2 downto 0);

  signal memoryDataIn : std_logic_vector(63 downto 0);

begin

  readRequestReady_o <= readRequestComplete and busy;

  writeRequestReady_o <= writeRequestComplete and busy;

  readResponseReady_o <= readResponseComplete and busy;

  writeResponseReady_o <= writeResponseComplete and busy;

  portWriteReady_o <= portWriteComplete and busy;

  payloadLength_o <= std_logic_vector(payloadIndex);

  inboundStall_o <= busy when ((inboundStb_i = '1') and (inboundAdr_i = x"8")) else '0';

  MaintenanceRequest: process(clk, areset_n)

  begin

    if (areset_n = '0') then

      readRequestComplete <= '0';

      writeRequestComplete <= '0';

      readResponseComplete <= '0';

      writeResponseComplete <= '0';

      portWriteComplete <= '0';

      vc_o <= '0';

      crf_o <= '0';

      prio_o <= "00";

      tt_o <= "00";

      dstid_o <= (others=>'0');

      srcid_o <= (others=>'0');

      status_o <= (others=>'0');

      tid_o <= (others=>'0');

      hop_o <= (others=>'0');

      offset_o <= (others=>'0');

      wdptr_o <= '0';

      size_o <= (others=>'0');

      busy <= '0';

      transaction <= "0000";

      payloadIndex <= "000";

      packetIndex <= 0;

      memoryWrite <= '0';

      memoryAddress <= (others=>'0');

      memoryDataIn <= (others=>'0');

    elsif (clk'event and clk = '1') then

      if (enable = '1') then

        if (busy = '0') then

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

          -- This state waits for a new maintenance packet, receives it

          -- and parses it.

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

          if (inboundStb_i = '1') and (inboundAdr_i = x"8") then

            -- New inbound packet content.

            case (packetIndex) is

              when 0 =>

                -- x"0000" & ackid & vc & crf & prio & tt & ftype

                vc_o <= inboundDat_i(9);

                crf_o <= inboundDat_i(8);

                prio_o <= inboundDat_i(7 downto 6);

                tt_o <= inboundDat_i(5 downto 4);

                packetIndex <= packetIndex + 1;

              when 1 =>

                -- dstid

                dstid_o <= inboundDat_i;

                packetIndex <= packetIndex + 1;

              when 2 =>

                -- srcid

                srcid_o <= inboundDat_i;

                packetIndex <= packetIndex + 1;

              when 3 =>

                -- READ-REQUEST:   transaction & rdsize & srcTID & hop & config_offset(20:13)

                -- WRITE-REQUEST:  transaction & wrsize & srcTID & hop & config_offset(20:13)

                -- READ-RESPONSE:  transaction & status & srcTID & hop & reserved(7:0)

                -- WRITE-RESPONSE: transaction & status & srcTID & hop & reserved(7:0)

                -- PORT-WRITE:     transaction & status & reserved(7:0) & hop & reserved(7:0)

                transaction <= inboundDat_i(31 downto 28);

                size_o <= inboundDat_i(27 downto 24);

                status_o <= inboundDat_i(27 downto 24);

                tid_o <= inboundDat_i(23 downto 16);

                hop_o <= inboundDat_i(15 downto 8);

                offset_o(20 downto 13) <= inboundDat_i(7 downto 0);

                packetIndex <= packetIndex + 1;

              when 4 =>

                -- NO-PAYLOAD:   config_offset(12:0) & wdptr & rsrv(1:0) & crc(15:0)

                -- WITH-PAYLOAD: config_offset(12:0) & wdptr & rsrv(1:0) & double-word0(63:48)

                offset_o(12 downto 0) <= inboundDat_i(31 downto 19);

                wdptr_o <= inboundDat_i(18);

                packetData(47 downto 32) <= inboundDat_i(15 downto 0);

                if (ENABLE_READ_REQUEST and (transaction = TTYPE_MAINTENANCE_READ_REQUEST)) then

                  readRequestComplete <= '1';

                elsif (ENABLE_WRITE_RESPONSE and (transaction = TTYPE_MAINTENANCE_WRITE_RESPONSE)) then

                  writeResponseComplete <= '1';

                end if;

                packetIndex <= packetIndex + 1;

              when 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 =>

                -- double-word(47:16)

                packetData(31 downto 0) <= inboundDat_i;

                memoryWrite <= '0';

                packetIndex <= packetIndex + 1;

              when 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 =>

                -- double-word(15:0) & double-word(63:48)

                packetData(47 downto 32) <= inboundDat_i(15 downto 0);

                payloadIndex <= payloadIndex + 1;

                memoryWrite <= '1';

                memoryAddress <= std_logic_vector(payloadIndex);

                memoryDataIn <= packetData & inboundDat_i(31 downto 16);

                if (ENABLE_WRITE_REQUEST and (transaction = TTYPE_MAINTENANCE_WRITE_REQUEST)) then

                  writeRequestComplete <= '1';

                elsif (ENABLE_READ_RESPONSE and (transaction = TTYPE_MAINTENANCE_READ_RESPONSE)) then

                  readResponseComplete <= '1';

                elsif (ENABLE_PORT_WRITE and (transaction = TTYPE_MAINTENANCE_PORT_WRITE)) then

                  -- REMARK: Do this when 2 double words has been received?

                  portWriteComplete <= '1';

                end if;

                packetIndex <= packetIndex + 1;

              when others =>

                -- There should be no more content in a maintenance packet.

                -- Discard.

                report "MaintenanceClass: Received unexpected packet content." severity warning;

            end case;

          else

            -- No incoming packet content.

            -- Make sure there is no write access anymore.

            memoryWrite <= '0';

            -- Check if a packet has been completed.

            if ((readRequestComplete = '1') or (writeRequestComplete = '1') or

                (readResponseComplete = '1') or (writeResponseComplete = '1') or

                (portWriteComplete = '1')) then

              -- Packet completed.

              busy <= '1';

            else

              -- No packet completed.

              packetIndex <= 0;

              payloadIndex <= (others=>'0');

            end if;

          end if;

        else

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

          -- Stall any incoming maintenance packet until the current has been

          -- processed and wait for the handler of the packet to signal that it

          -- has been processed.

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

          if (done_i = '1') then

            busy <= '0';

            packetIndex <= 0;

            payloadIndex <= (others=>'0');

            readRequestComplete <= '0';

            writeRequestComplete <= '0';

            readResponseComplete <= '0';

            writeResponseComplete <= '0';

            portWriteComplete <= '0';

          end if;

        end if;

      end if;

    end if;

  end process;

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

  -- Payload content memory.

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

  PayloadMemory: MemorySimpleDualPort

    generic map(ADDRESS_WIDTH=>3, DATA_WIDTH=>64)

    port map(clkA_i=>clk,

             enableA_i=>memoryWrite,

             addressA_i=>memoryAddress,

             dataA_i=>memoryDataIn,

             clkB_i=>clk,

             enableB_i=>enable,

             addressB_i=>payloadIndex_i,

             dataB_o=>payload_o);

end architecture;

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

-- RequestClassInbound.

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

-- REMARK: Extended addresses are not supported yet...

library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

use work.rio_common.all;

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

-- 

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

entity RequestClassInbound is

  generic(

    EXTENDED_ADDRESS : natural range 0 to 2 := 0);

  port(

    clk : in std_logic;

    areset_n : in std_logic;

    enable : in std_logic;

    nreadReady_o : out std_logic;

    vc_o : out std_logic;

    crf_o : out std_logic;

    prio_o : out std_logic_vector(1 downto 0);

    tt_o : out std_logic_vector(1 downto 0);

    dstId_o : out std_logic_vector(31 downto 0);

    srcId_o : out std_logic_vector(31 downto 0);

    tid_o : out std_logic_vector(7 downto 0);

    address_o : out std_logic_vector(16*EXTENDED_ADDRESS+30 downto 0);

    length_o : out std_logic_vector(4 downto 0);

    select_o : out std_logic_vector(7 downto 0);

    done_i : in std_logic;

    inboundStb_i : in std_logic;

    inboundAdr_i : in std_logic_vector(3 downto 0);

    inboundDat_i : in std_logic_vector(31 downto 0);

    inboundStall_o : out std_logic);

end entity;

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

-- 

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

architecture RequestClassInbound of RequestClassInbound is

  signal busy : std_logic;

  signal transaction : std_logic_vector(3 downto 0);

  signal complete : std_logic;

  signal packetIndex : natural range 0 to 69;

  signal rdsize : std_logic_vector(3 downto 0);

  signal wdptr : std_logic;

begin

  nreadReady_o <= complete and busy;

  inboundStall_o <= busy when ((inboundStb_i = '1') and (inboundAdr_i = x"2")) else '0';

  RequestClass: process(clk, areset_n)

  begin

    if (areset_n = '0') then

      complete <= '0';

      transaction <= "0000";

      vc_o <= '0';

      crf_o <= '0';

      prio_o <= "00";

      tt_o <= "00";

      dstId_o <= (others=>'0');

      srcId_o <= (others=>'0');

      tid_o <= (others=>'0');

      address_o <= (others=>'0');

      rdsize <= (others=>'0');

      wdptr <= '0';

      busy <= '0';

      packetIndex <= 0;

    elsif (clk'event and clk = '1') then

      if (enable = '1') then

        if (busy = '0') then

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

          -- This state waits for a new REQUEST class packet, receives it

          -- and parses it.

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

          if ((inboundStb_i = '1') and (inboundAdr_i = x"2")) then

            -- New inbound packet content.

            case (packetIndex) is

              when 0 =>

                -- x"0000" & ackid & vc & crf & prio & tt & ftype

                vc_o <= inboundDat_i(9);

                crf_o <= inboundDat_i(8);

                prio_o <= inboundDat_i(7 downto 6);

                tt_o <= inboundDat_i(5 downto 4);

                packetIndex <= packetIndex + 1;

              when 1 =>

                -- dstid

                dstId_o <= inboundDat_i;

                packetIndex <= packetIndex + 1;

              when 2 =>

                -- srcid

                srcId_o <= inboundDat_i;

                packetIndex <= packetIndex + 1;

              when 3 =>

                -- transaction(3:0) & rdsize(3:0) & srcTID(7:0) & address(28:13)

                transaction <= inboundDat_i(31 downto 28);

                rdsize <= inboundDat_i(27 downto 24);

                tid_o <= inboundDat_i(23 downto 16);

                address_o(28 downto 13) <= inboundDat_i(15 downto 0);

                packetIndex <= packetIndex + 1;

              when 4 =>

                -- address(12:0) & wdptr & xamsbs(1:0) & crc(15:0)

                address_o(12 downto 0) <= inboundDat_i(31 downto 19);

                wdptr <= inboundDat_i(18);

                address_o(30 downto 29) <= inboundDat_i(17 downto 16);

                packetIndex <= packetIndex + 1;

                if (transaction = TTYPE_NREAD_TRANSACTION) then

                  -- An NREAD packet has been completed.

                  complete <= '1';

                end if;

              when others =>

                -- There should be no more content in a REQUEST.

                -- Discard.

                report "RequestClass: Received unexpected packet content." severity warning;

            end case;

          else

            -- No incoming packet content.

            busy <= complete;

          end if;

        else

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

          -- Stall any incoming REQUEST packet until the current has been

          -- processed and wait for the handler of the packet to signal that it

          -- has been processed.

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

          if (done_i = '1') then

            busy <= '0';

            packetIndex <= 0;

            complete <= '0';

          end if;

        end if;

      end if;

    end if;

  end process;

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

  -- Transformation of rdsize and wdptr into length of access and byte lanes.

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

  process(clk, areset_n)

  begin

    if (areset_n = '0') then

      length_o <= "00000";

      select_o <= (others=>'0');

    elsif (clk'event and clk = '1') then

      if (complete = '1') then

        if (wdptr = '0') then

          case rdsize is

            when "0000" =>

              length_o <= "00001";

              select_o <= "10000000";

            when "0001" =>

              length_o <= "00001";

              select_o <= "01000000";

            when "0010" =>

              length_o <= "00001";

              select_o <= "00100000";

            when "0011" =>

              length_o <= "00001";

              select_o <= "00010000";

            when "0100" =>

              length_o <= "00001";

              select_o <= "11000000";

            when "0101" =>

              length_o <= "00001";

              select_o <= "11100000";

            when "0110" =>

              length_o <= "00001";

              select_o <= "00110000";

            when "0111" =>

              length_o <= "00001";

              select_o <= "11111000";

            when "1000" =>

              length_o <= "00001";

              select_o <= "11110000";

            when "1001" =>

              length_o <= "00001";

              select_o <= "11111100";

            when "1010" =>

              length_o <= "00001";

              select_o <= "11111110";

            when "1011" =>

              length_o <= "00001";

              select_o <= "11111111";

            when "1100" =>

              length_o <= "00100";

              select_o <= "11111111";

            when "1101" =>

              length_o <= "01100";

              select_o <= "11111111";

            when "1110" =>

              length_o <= "10100";

              select_o <= "11111111";

            when others =>

              length_o <= "11100";

              select_o <= "11111111";

          end case;

        else

          case rdsize is

            when "0000" =>

              length_o <= "00001";

              select_o <= "00001000";

            when "0001" =>

              length_o <= "00001";

              select_o <= "00000100";

            when "0010" =>

              length_o <= "00001";

              select_o <= "00000010";

            when "0011" =>

              length_o <= "00001";

              select_o <= "00000001";

            when "0100" =>

              length_o <= "00001";

              select_o <= "00001100";

            when "0101" =>

              length_o <= "00001";

              select_o <= "00000111";

            when "0110" =>

              length_o <= "00001";

              select_o <= "00000011";

            when "0111" =>

              length_o <= "00001";

              select_o <= "00011111";

            when "1000" =>

              length_o <= "00001";

              select_o <= "00001111";

            when "1001" =>

              length_o <= "00001";

              select_o <= "00111111";

            when "1010" =>

              length_o <= "00001";

              select_o <= "01111111";

            when "1011" =>

              length_o <= "00010";

              select_o <= "11111111";

            when "1100" =>

              length_o <= "01000";

              select_o <= "11111111";

            when "1101" =>

              length_o <= "10000";

              select_o <= "11111111";

            when "1110" =>

              length_o <= "11000";

              select_o <= "11111111";

            when others =>

              length_o <= "00000";

              select_o <= "11111111";

          end case;

        end if;

      end if;

    end if;

  end process;

end architecture;

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

-- 

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

library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

use work.rio_common.all;

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

-- 

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

-- REMARK: Add support for extended addresses...

-- length_o is the actual size of the access. A 32 double-word access has length=0.

entity WriteClassInbound is

  generic(

    ENABLE_NWRITE : boolean := true;

    ENABLE_NWRITER : boolean := true;

    EXTENDED_ADDRESS : natural range 0 to 2 := 0);

  port(

    clk : in std_logic;

    areset_n : in std_logic;

    enable : in std_logic;

    nwriteReady_o : out std_logic;

    nwriterReady_o : out std_logic;

    vc_o : out std_logic;

    crf_o : out std_logic;

    prio_o : out std_logic_vector(1 downto 0);

    tt_o : out std_logic_vector(1 downto 0);

    dstId_o : out std_logic_vector(31 downto 0);

    srcId_o : out std_logic_vector(31 downto 0);

    tid_o : out std_logic_vector(7 downto 0);

    address_o : out std_logic_vector(16*EXTENDED_ADDRESS+30 downto 0);

    length_o : out std_logic_vector(4 downto 0);

    select_o : out std_logic_vector(7 downto 0);

    payloadIndex_i : in std_logic_vector(4 downto 0);

    payload_o : out std_logic_vector(63 downto 0);

    done_i : in std_logic;

    inboundStb_i : in std_logic;

    inboundAdr_i : in std_logic_vector(3 downto 0);