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magro732 |
-------------------------------------------------------------------------------
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--
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-- RapidIO IP Library Core
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--
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-- This file is part of the RapidIO IP library project
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-- http://www.opencores.org/cores/rio/
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--
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-- Description
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-- Containing RapidIO packet parsers and generators.
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--
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-- To Do:
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-- - Add support for maint-request and response in both directions.
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-- - Add support for portWrite in both directions.
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-- - Add generic to disable support for specified packets.
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-- - Dont set complete before the packet is ready in inbound packet
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-- handler.
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-- - Add error indication if erronous sizes are received.
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--
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-- Author(s):
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-- - Magnus Rosenius, magro732@opencores.org
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--
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-------------------------------------------------------------------------------
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--
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-- Copyright (C) 2014 Authors and OPENCORES.ORG
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--
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-- This source file may be used and distributed without
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-- restriction provided that this copyright statement is not
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-- removed from the file and that any derivative work contains
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-- the original copyright notice and the associated disclaimer.
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--
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-- This source file is free software; you can redistribute it
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-- and/or modify it under the terms of the GNU Lesser General
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-- Public License as published by the Free Software Foundation;
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-- either version 2.1 of the License, or (at your option) any
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-- later version.
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--
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-- This source is distributed in the hope that it will be
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-- useful, but WITHOUT ANY WARRANTY; without even the implied
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-- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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-- PURPOSE. See the GNU Lesser General Public License for more
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-- details.
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--
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-- You should have received a copy of the GNU Lesser General
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-- Public License along with this source; if not, download it
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-- from http://www.opencores.org/lgpl.shtml
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--
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-- MaintenanceInbound
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-------------------------------------------------------------------------------
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.numeric_std.all;
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use work.rio_common.all;
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-------------------------------------------------------------------------------
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-- Entity for MaintenanceInbound.
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-------------------------------------------------------------------------------
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entity MaintenanceInbound is
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port(
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clk : in std_logic;
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areset_n : in std_logic;
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enable : in std_logic;
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readRequestReady_o : out std_logic;
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writeRequestReady_o : out std_logic;
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readResponseReady_o : out std_logic;
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writeResponseReady_o : out std_logic;
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portWriteReady_o : out std_logic;
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vc_o : out std_logic;
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crf_o : out std_logic;
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prio_o : out std_logic_vector(1 downto 0);
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tt_o : out std_logic_vector(1 downto 0);
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dstid_o : out std_logic_vector(31 downto 0);
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srcid_o : out std_logic_vector(31 downto 0);
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magro732 |
size_o : out std_logic_vector(3 downto 0);
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status_o : out std_logic_vector(3 downto 0);
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magro732 |
tid_o : out std_logic_vector(7 downto 0);
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hop_o : out std_logic_vector(7 downto 0);
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offset_o : out std_logic_vector(20 downto 0);
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wdptr_o : out std_logic;
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magro732 |
payloadLength_o : out std_logic_vector(2 downto 0);
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payloadIndex_i : in std_logic_vector(2 downto 0);
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payload_o : out std_logic_vector(63 downto 0);
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magro732 |
done_i : in std_logic;
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inboundCyc_i : in std_logic;
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inboundStb_i : in std_logic;
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inboundAdr_i : in std_logic_vector(7 downto 0);
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inboundDat_i : in std_logic_vector(31 downto 0);
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inboundAck_o : out std_logic);
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end entity;
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-------------------------------------------------------------------------------
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-- Architecture for MaintenanceInbound.
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-------------------------------------------------------------------------------
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architecture MaintenanceInbound of MaintenanceInbound is
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type StateType is (RECEIVE_PACKET, READY);
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signal state : StateType;
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signal wdptr : std_logic;
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signal size : std_logic_vector(3 downto 0);
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signal inboundAck : std_logic;
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magro732 |
signal readRequestComplete : std_logic;
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signal writeRequestComplete : std_logic;
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signal readResponseComplete : std_logic;
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signal writeResponseComplete : std_logic;
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magro732 |
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magro732 |
signal packetIndex : natural range 0 to 21;
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signal packetData : std_logic_vector(47 downto 0);
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magro732 |
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signal memoryWrite : std_logic;
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magro732 |
signal memoryAddress : std_logic_vector(2 downto 0);
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signal memoryDataIn : std_logic_vector(63 downto 0);
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magro732 |
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begin
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magro732 |
readRequestReady_o <= readRequestComplete when (state = READY) else '0';
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writeRequestReady_o <= writeRequestComplete when (state = READY) else '0';
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readResponseReady_o <= readResponseComplete when (state = READY) else '0';
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writeResponseReady_o <= writeResponseComplete when (state = READY) else '0';
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magro732 |
portWriteReady_o <= '0';
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inboundAck_o <= inboundAck;
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MaintenanceRequest: process(clk, areset_n)
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begin
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if (areset_n = '0') then
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inboundAck <= '0';
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magro732 |
readRequestComplete <= '0';
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writeRequestComplete <= '0';
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readResponseComplete <= '0';
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writeResponseComplete <= '0';
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magro732 |
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vc_o <= '0';
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crf_o <= '0';
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prio_o <= "00";
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tt_o <= "00";
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dstid_o <= (others=>'0');
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srcid_o <= (others=>'0');
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magro732 |
status_o <= (others=>'0');
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magro732 |
tid_o <= (others=>'0');
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hop_o <= (others=>'0');
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offset_o <= (others=>'0');
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wdptr <= '0';
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size <= (others=>'0');
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packetIndex <= 0;
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memoryWrite <= '0';
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memoryAddress <= (others=>'0');
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memoryDataIn <= (others=>'0');
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elsif (clk'event and clk = '1') then
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case state is
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when RECEIVE_PACKET =>
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---------------------------------------------------------------------
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-- This state waits for a new maintenance packet, receives it
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-- and parses it.
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---------------------------------------------------------------------
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if (inboundCyc_i = '1') then
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if (inboundAck = '0') then
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if (inboundStb_i = '1') then
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if (inboundAdr_i = x"80") then
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-------------------------------------------------------------
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-- Maintenance Read Request packet parser.
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-------------------------------------------------------------
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case (packetIndex) is
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when 0 =>
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-- x"0000" & ackid & vc & crf & prio & tt & ftype
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vc_o <= inboundDat_i(9);
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crf_o <= inboundDat_i(8);
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prio_o <= inboundDat_i(7 downto 6);
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tt_o <= inboundDat_i(5 downto 4);
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packetIndex <= packetIndex + 1;
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when 1 =>
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-- dstid
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dstid_o <= inboundDat_i;
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packetIndex <= packetIndex + 1;
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when 2 =>
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-- srcid
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srcid_o <= inboundDat_i;
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packetIndex <= packetIndex + 1;
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when 3 =>
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-- transaction & rdsize & srcTID & hop & config_offset(20:13)
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size <= inboundDat_i(27 downto 24);
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tid_o <= inboundDat_i(23 downto 16);
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hop_o <= inboundDat_i(15 downto 8);
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offset_o(20 downto 13) <= inboundDat_i(7 downto 0);
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packetIndex <= packetIndex + 1;
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when 4 =>
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-- config_offset(12:0) & wdptr & rsrv & crc(15:0)
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offset_o(12 downto 0) <= inboundDat_i(31 downto 19);
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wdptr <= inboundDat_i(18);
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packetIndex <= packetIndex + 1;
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magro732 |
readRequestComplete <= '1';
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magro732 |
when others =>
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-- There should be no more content in a maintenance read request.
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-- Discard.
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magro732 |
--report "Received unexpected packet content in read request." severity warning;
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magro732 |
end case;
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inboundAck <= '1';
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elsif (inboundAdr_i = x"81") then
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-------------------------------------------------------------
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-- Maintenance Write Request packet parser.
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-------------------------------------------------------------
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case (packetIndex) is
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when 0 =>
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-- x"0000" & ackid & vc & crf & prio & tt & ftype
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vc_o <= inboundDat_i(9);
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crf_o <= inboundDat_i(8);
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prio_o <= inboundDat_i(7 downto 6);
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tt_o <= inboundDat_i(5 downto 4);
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packetIndex <= packetIndex + 1;
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when 1 =>
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-- destId
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dstid_o <= inboundDat_i;
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packetIndex <= packetIndex + 1;
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when 2 =>
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-- srcId
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srcid_o <= inboundDat_i;
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packetIndex <= packetIndex + 1;
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when 3 =>
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-- transaction & wrsize & srcTID & hop & config_offset(20:13)
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size <= inboundDat_i(27 downto 24);
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tid_o <= inboundDat_i(23 downto 16);
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hop_o <= inboundDat_i(15 downto 8);
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offset_o(20 downto 13) <= inboundDat_i(7 downto 0);
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packetIndex <= packetIndex + 1;
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when 4 =>
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-- config_offset(12:0) & wdptr & rsrv & double-word(63:48)
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offset_o(12 downto 0) <= inboundDat_i(31 downto 19);
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wdptr <= inboundDat_i(18);
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magro732 |
packetData(47 downto 32) <= inboundDat_i(15 downto 0);
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46 |
magro732 |
packetIndex <= packetIndex + 1;
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241 |
47 |
magro732 |
when 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 =>
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magro732 |
-- double-word(47:16)
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47 |
magro732 |
packetData(31 downto 0) <= inboundDat_i;
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46 |
magro732 |
packetIndex <= packetIndex + 1;
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245 |
47 |
magro732 |
when 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 =>
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46 |
magro732 |
-- double-word(15:0) & double-word(63:48)
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magro732 |
packetData(47 downto 32) <= inboundDat_i(15 downto 0);
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46 |
magro732 |
packetIndex <= packetIndex + 1;
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memoryWrite <= '1';
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250 |
47 |
magro732 |
memoryDataIn <= packetData & inboundDat_i(31 downto 16);
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writeRequestComplete <= '1';
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46 |
magro732 |
when others =>
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253 |
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-- There should be no more content in a maintenance write request.
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254 |
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-- Discard.
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255 |
47 |
magro732 |
--report "Received unexpected packet content in write request." severity warning;
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256 |
46 |
magro732 |
end case;
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257 |
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inboundAck <= '1';
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258 |
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elsif (inboundAdr_i = x"82") then
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259 |
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-------------------------------------------------------------
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260 |
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-- Maintenance Read Response packet parser.
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261 |
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-------------------------------------------------------------
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262 |
47 |
magro732 |
case (packetIndex) is
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263 |
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when 0 =>
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264 |
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-- x"0000" & ackid & vc & crf & prio & tt & ftype
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265 |
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vc_o <= inboundDat_i(9);
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266 |
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crf_o <= inboundDat_i(8);
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267 |
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prio_o <= inboundDat_i(7 downto 6);
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268 |
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tt_o <= inboundDat_i(5 downto 4);
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269 |
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packetIndex <= packetIndex + 1;
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270 |
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when 1 =>
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271 |
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-- destid
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272 |
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dstid_o <= inboundDat_i;
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273 |
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packetIndex <= packetIndex + 1;
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274 |
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when 2 =>
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275 |
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-- srcid
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276 |
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srcid_o <= inboundDat_i;
|
277 |
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packetIndex <= packetIndex + 1;
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278 |
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when 3 =>
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279 |
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-- transaction & status & srcTID & hop & reserved(7:0)
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280 |
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status_o <= inboundDat_i(27 downto 24);
|
281 |
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tid_o <= inboundDat_i(23 downto 16);
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282 |
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hop_o <= inboundDat_i(15 downto 8);
|
283 |
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packetIndex <= packetIndex + 1;
|
284 |
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when 4 =>
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285 |
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-- reserved(15:0) & wdptr & rsrv & double-word(63:48)
|
286 |
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packetData(47 downto 32) <= inboundDat_i(15 downto 0);
|
287 |
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packetIndex <= packetIndex + 1;
|
288 |
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when 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 =>
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289 |
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-- double-word(47:16)
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290 |
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packetData(31 downto 0) <= inboundDat_i;
|
291 |
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packetIndex <= packetIndex + 1;
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292 |
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when 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 =>
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293 |
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-- double-word(15:0) & double-word(63:48)
|
294 |
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packetData(47 downto 32) <= inboundDat_i(15 downto 0);
|
295 |
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packetIndex <= packetIndex + 1;
|
296 |
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memoryWrite <= '1';
|
297 |
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memoryDataIn <= packetData & inboundDat_i(31 downto 16);
|
298 |
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readResponseComplete <= '1';
|
299 |
|
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when others =>
|
300 |
|
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-- There should be no more content in a maintenance write request.
|
301 |
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-- Discard.
|
302 |
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--report "Received unexpected packet content in read response." severity warning;
|
303 |
|
|
end case;
|
304 |
|
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inboundAck <= '1';
|
305 |
46 |
magro732 |
elsif (inboundAdr_i = x"83") then
|
306 |
|
|
-------------------------------------------------------------
|
307 |
|
|
-- Maintenance Write Response packet parser.
|
308 |
|
|
-------------------------------------------------------------
|
309 |
47 |
magro732 |
case (packetIndex) is
|
310 |
|
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when 0 =>
|
311 |
|
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-- x"0000" & ackid & vc & crf & prio & tt & ftype
|
312 |
|
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vc_o <= inboundDat_i(9);
|
313 |
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crf_o <= inboundDat_i(8);
|
314 |
|
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prio_o <= inboundDat_i(7 downto 6);
|
315 |
|
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tt_o <= inboundDat_i(5 downto 4);
|
316 |
|
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packetIndex <= packetIndex + 1;
|
317 |
|
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when 1 =>
|
318 |
|
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-- dstid
|
319 |
|
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dstid_o <= inboundDat_i;
|
320 |
|
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packetIndex <= packetIndex + 1;
|
321 |
|
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when 2 =>
|
322 |
|
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-- srcid
|
323 |
|
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srcid_o <= inboundDat_i;
|
324 |
|
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packetIndex <= packetIndex + 1;
|
325 |
|
|
when 3 =>
|
326 |
|
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-- transaction & status & srcTID & hop & reserved(7:0)
|
327 |
|
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status_o <= inboundDat_i(27 downto 24);
|
328 |
|
|
tid_o <= inboundDat_i(23 downto 16);
|
329 |
|
|
hop_o <= inboundDat_i(15 downto 8);
|
330 |
|
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packetIndex <= packetIndex + 1;
|
331 |
|
|
when 4 =>
|
332 |
|
|
-- reserved(15:0) & crc(15:0)
|
333 |
|
|
packetIndex <= packetIndex + 1;
|
334 |
|
|
writeResponseComplete <= '1';
|
335 |
|
|
when others =>
|
336 |
|
|
-- There should be no more content in a maintenance read request.
|
337 |
|
|
-- Discard.
|
338 |
|
|
--report "Received unexpected packet content in write response." severity warning;
|
339 |
|
|
end case;
|
340 |
|
|
inboundAck <= '1';
|
341 |
46 |
magro732 |
elsif (inboundAdr_i = x"84") then
|
342 |
|
|
-------------------------------------------------------------
|
343 |
|
|
-- Maintenance Port-Write Request packet parser.
|
344 |
|
|
-------------------------------------------------------------
|
345 |
|
|
else
|
346 |
|
|
-------------------------------------------------------------
|
347 |
|
|
-- Unsupported maintenance packet.
|
348 |
|
|
-------------------------------------------------------------
|
349 |
47 |
magro732 |
-- Cannot handle these, dont answer.
|
350 |
46 |
magro732 |
end if;
|
351 |
|
|
end if;
|
352 |
|
|
else
|
353 |
|
|
if (memoryWrite = '1') then
|
354 |
|
|
memoryAddress <= std_logic_vector(unsigned(memoryAddress) + 1);
|
355 |
|
|
end if;
|
356 |
|
|
|
357 |
|
|
memoryWrite <= '0';
|
358 |
|
|
inboundAck <= '0';
|
359 |
|
|
end if;
|
360 |
|
|
else
|
361 |
47 |
magro732 |
if ((readRequestComplete = '1') or (writeRequestComplete = '1') or
|
362 |
|
|
(readResponseComplete = '1') or (writeResponseComplete = '1')) then
|
363 |
46 |
magro732 |
state <= READY;
|
364 |
47 |
magro732 |
else
|
365 |
|
|
packetIndex <= 0;
|
366 |
|
|
memoryAddress <= (others=>'0');
|
367 |
46 |
magro732 |
end if;
|
368 |
|
|
end if;
|
369 |
|
|
|
370 |
|
|
when READY =>
|
371 |
|
|
---------------------------------------------------------------------
|
372 |
|
|
-- Wait for the handler of the packet to signal that it has been
|
373 |
|
|
-- processed.
|
374 |
|
|
---------------------------------------------------------------------
|
375 |
|
|
if (done_i = '1') then
|
376 |
47 |
magro732 |
packetIndex <= 0;
|
377 |
|
|
memoryAddress <= (others=>'0');
|
378 |
|
|
|
379 |
|
|
readRequestComplete <= '0';
|
380 |
|
|
writeRequestComplete <= '0';
|
381 |
|
|
readResponseComplete <= '0';
|
382 |
|
|
writeResponseComplete <= '0';
|
383 |
46 |
magro732 |
state <= RECEIVE_PACKET;
|
384 |
|
|
end if;
|
385 |
|
|
|
386 |
|
|
when others =>
|
387 |
|
|
---------------------------------------------------------------------
|
388 |
|
|
--
|
389 |
|
|
---------------------------------------------------------------------
|
390 |
|
|
|
391 |
|
|
end case;
|
392 |
|
|
end if;
|
393 |
|
|
end process;
|
394 |
|
|
|
395 |
|
|
-----------------------------------------------------------------------------
|
396 |
|
|
-- Transformation of rdsize/wrsize into length of access and byte lanes.
|
397 |
|
|
-----------------------------------------------------------------------------
|
398 |
|
|
|
399 |
|
|
process(clk, areset_n)
|
400 |
|
|
begin
|
401 |
|
|
if (areset_n = '0') then
|
402 |
47 |
magro732 |
size_o <= (others=>'0');
|
403 |
|
|
wdptr_o <= '0';
|
404 |
46 |
magro732 |
payloadLength_o <= (others=>'0');
|
405 |
|
|
elsif (clk'event and clk = '1') then
|
406 |
47 |
magro732 |
if (readRequestComplete = '1') or (writeRequestComplete = '1') then
|
407 |
|
|
size_o <= size;
|
408 |
|
|
wdptr_o <= wdptr;
|
409 |
|
|
payloadLength_o <= memoryAddress;
|
410 |
|
|
elsif (readResponseComplete = '1') then
|
411 |
|
|
size_o <= size;
|
412 |
|
|
wdptr_o <= wdptr;
|
413 |
|
|
payloadLength_o <= memoryAddress;
|
414 |
|
|
else
|
415 |
|
|
size_o <= size;
|
416 |
|
|
wdptr_o <= wdptr;
|
417 |
|
|
payloadLength_o <= (others=>'0');
|
418 |
46 |
magro732 |
end if;
|
419 |
|
|
end if;
|
420 |
|
|
end process;
|
421 |
|
|
|
422 |
|
|
-----------------------------------------------------------------------------
|
423 |
|
|
-- Payload content memory.
|
424 |
|
|
-----------------------------------------------------------------------------
|
425 |
|
|
PayloadMemory: MemorySimpleDualPort
|
426 |
47 |
magro732 |
generic map(ADDRESS_WIDTH=>3, DATA_WIDTH=>64)
|
427 |
46 |
magro732 |
port map(clkA_i=>clk,
|
428 |
|
|
enableA_i=>memoryWrite,
|
429 |
|
|
addressA_i=>memoryAddress,
|
430 |
|
|
dataA_i=>memoryDataIn,
|
431 |
|
|
clkB_i=>clk,
|
432 |
|
|
enableB_i=>enable,
|
433 |
|
|
addressB_i=>payloadIndex_i,
|
434 |
|
|
dataB_o=>payload_o);
|
435 |
|
|
|
436 |
|
|
end architecture;
|
437 |
|
|
|
438 |
|
|
|
439 |
|
|
-------------------------------------------------------------------------------
|
440 |
|
|
-- MaintenanceOutbound.
|
441 |
|
|
-------------------------------------------------------------------------------
|
442 |
|
|
library ieee;
|
443 |
|
|
use ieee.std_logic_1164.all;
|
444 |
|
|
use ieee.numeric_std.all;
|
445 |
|
|
use work.rio_common.all;
|
446 |
|
|
|
447 |
|
|
-------------------------------------------------------------------------------
|
448 |
|
|
-- Entity for MaintenanceOutbound.
|
449 |
|
|
-------------------------------------------------------------------------------
|
450 |
|
|
entity MaintenanceOutbound is
|
451 |
|
|
port(
|
452 |
|
|
clk : in std_logic;
|
453 |
|
|
areset_n : in std_logic;
|
454 |
|
|
enable : in std_logic;
|
455 |
|
|
|
456 |
|
|
readRequestReady_i : in std_logic;
|
457 |
|
|
writeRequestReady_i : in std_logic;
|
458 |
|
|
readResponseReady_i : in std_logic;
|
459 |
|
|
writeResponseReady_i : in std_logic;
|
460 |
|
|
portWriteReady_i : in std_logic;
|
461 |
|
|
vc_i : in std_logic;
|
462 |
|
|
crf_i : in std_logic;
|
463 |
|
|
prio_i : in std_logic_vector(1 downto 0);
|
464 |
|
|
tt_i : in std_logic_vector(1 downto 0);
|
465 |
|
|
dstid_i : in std_logic_vector(31 downto 0);
|
466 |
|
|
srcid_i : in std_logic_vector(31 downto 0);
|
467 |
47 |
magro732 |
size_i : in std_logic_vector(3 downto 0);
|
468 |
46 |
magro732 |
status_i : in std_logic_vector(3 downto 0);
|
469 |
|
|
tid_i : in std_logic_vector(7 downto 0);
|
470 |
|
|
hop_i : in std_logic_vector(7 downto 0);
|
471 |
47 |
magro732 |
offset_i : in std_logic_vector(20 downto 0);
|
472 |
46 |
magro732 |
wdptr_i : in std_logic;
|
473 |
47 |
magro732 |
payloadLength_i : in std_logic_vector(2 downto 0);
|
474 |
|
|
payloadIndex_o : out std_logic_vector(2 downto 0);
|
475 |
|
|
payload_i : in std_logic_vector(63 downto 0);
|
476 |
46 |
magro732 |
done_o : out std_logic;
|
477 |
|
|
|
478 |
|
|
outboundCyc_o : out std_logic;
|
479 |
|
|
outboundStb_o : out std_logic;
|
480 |
|
|
outboundDat_o : out std_logic_vector(31 downto 0);
|
481 |
|
|
outboundAck_i : in std_logic);
|
482 |
|
|
end entity;
|
483 |
|
|
|
484 |
|
|
|
485 |
|
|
-------------------------------------------------------------------------------
|
486 |
|
|
-- Architecture for MaintenanceOutbound.
|
487 |
|
|
-------------------------------------------------------------------------------
|
488 |
|
|
architecture MaintenanceOutbound of MaintenanceOutbound is
|
489 |
|
|
type StateType is (WAIT_PACKET,
|
490 |
47 |
magro732 |
READ_REQUEST, WRITE_REQUEST,
|
491 |
46 |
magro732 |
READ_RESPONSE, WRITE_RESPONSE,
|
492 |
|
|
WAIT_COMPLETE, RESPONSE_DONE);
|
493 |
|
|
signal state : StateType;
|
494 |
47 |
magro732 |
signal packetIndex : natural range 0 to 21;
|
495 |
|
|
|
496 |
46 |
magro732 |
signal header : std_logic_vector(31 downto 0);
|
497 |
|
|
signal payload : std_logic_vector(15 downto 0);
|
498 |
47 |
magro732 |
signal payloadIndex : std_logic_vector(2 downto 0);
|
499 |
46 |
magro732 |
|
500 |
|
|
begin
|
501 |
|
|
|
502 |
|
|
-- unused(31:16) | ackId(15:10) | vc(9) | crf(8) | prio(7:6) | tt(5:4) | ftype(3:0).
|
503 |
|
|
header <= x"0000" & "000000" & vc_i & crf_i & prio_i & tt_i & x"8";
|
504 |
|
|
|
505 |
|
|
payloadIndex_o <= payloadIndex;
|
506 |
|
|
|
507 |
|
|
MaintenanceResponse: process(clk, areset_n)
|
508 |
|
|
begin
|
509 |
|
|
if (areset_n = '0') then
|
510 |
|
|
state <= WAIT_PACKET;
|
511 |
|
|
packetIndex <= 0;
|
512 |
|
|
|
513 |
|
|
payload <= (others=>'0');
|
514 |
|
|
payloadIndex <= (others=>'0');
|
515 |
|
|
|
516 |
|
|
outboundCyc_o <= '0';
|
517 |
|
|
outboundStb_o <= '0';
|
518 |
|
|
|
519 |
|
|
done_o <= '0';
|
520 |
|
|
elsif (clk'event and clk = '1') then
|
521 |
|
|
if (enable = '1') then
|
522 |
|
|
case state is
|
523 |
|
|
when WAIT_PACKET =>
|
524 |
|
|
-------------------------------------------------------------------
|
525 |
|
|
--
|
526 |
|
|
-------------------------------------------------------------------
|
527 |
47 |
magro732 |
payloadIndex <= (others=>'0');
|
528 |
|
|
if (readRequestReady_i = '1') then
|
529 |
46 |
magro732 |
outboundCyc_o <= '1';
|
530 |
|
|
outboundStb_o <= '1';
|
531 |
|
|
outboundDat_o <= header;
|
532 |
|
|
packetIndex <= 1;
|
533 |
47 |
magro732 |
state <= READ_REQUEST;
|
534 |
|
|
elsif (writeRequestReady_i = '1') then
|
535 |
|
|
outboundCyc_o <= '1';
|
536 |
|
|
outboundStb_o <= '1';
|
537 |
|
|
outboundDat_o <= header;
|
538 |
|
|
packetIndex <= 1;
|
539 |
|
|
state <= WRITE_REQUEST;
|
540 |
|
|
elsif (readResponseReady_i = '1') then
|
541 |
|
|
outboundCyc_o <= '1';
|
542 |
|
|
outboundStb_o <= '1';
|
543 |
|
|
outboundDat_o <= header;
|
544 |
|
|
packetIndex <= 1;
|
545 |
46 |
magro732 |
state <= READ_RESPONSE;
|
546 |
|
|
elsif (writeResponseReady_i = '1') then
|
547 |
|
|
outboundCyc_o <= '1';
|
548 |
|
|
outboundStb_o <= '1';
|
549 |
|
|
outboundDat_o <= header;
|
550 |
|
|
packetIndex <= 1;
|
551 |
|
|
state <= WRITE_RESPONSE;
|
552 |
|
|
end if;
|
553 |
|
|
|
554 |
47 |
magro732 |
when READ_REQUEST =>
|
555 |
|
|
---------------------------------------------------------------------
|
556 |
|
|
--
|
557 |
|
|
---------------------------------------------------------------------
|
558 |
|
|
if (outboundAck_i = '1') then
|
559 |
|
|
case (packetIndex) is
|
560 |
|
|
when 1 =>
|
561 |
|
|
-- dstid
|
562 |
|
|
outboundDat_o <= dstid_i;
|
563 |
|
|
packetIndex <= packetIndex + 1;
|
564 |
|
|
when 2 =>
|
565 |
|
|
-- srcid
|
566 |
|
|
outboundDat_o <= srcid_i;
|
567 |
|
|
packetIndex <= packetIndex + 1;
|
568 |
|
|
when 3 =>
|
569 |
|
|
-- transaction & rdsize & srcTID & hop & config_offset(20:13)
|
570 |
|
|
outboundDat_o <= "0000" & size_i & tid_i & hop_i & offset_i(20 downto 13);
|
571 |
|
|
packetIndex <= packetIndex + 1;
|
572 |
|
|
when others =>
|
573 |
|
|
-- config_offset(12:0) & wdptr & rsrv & crc(15:0)
|
574 |
|
|
outboundDat_o <= offset_i(12 downto 0) & wdptr_i & "00" & x"0000";
|
575 |
|
|
packetIndex <= packetIndex + 1;
|
576 |
|
|
state <= WAIT_COMPLETE;
|
577 |
|
|
end case;
|
578 |
|
|
end if;
|
579 |
|
|
|
580 |
|
|
when WRITE_REQUEST =>
|
581 |
|
|
---------------------------------------------------------------------
|
582 |
|
|
--
|
583 |
|
|
---------------------------------------------------------------------
|
584 |
|
|
if (outboundAck_i = '1') then
|
585 |
|
|
case (packetIndex) is
|
586 |
|
|
when 1 =>
|
587 |
|
|
-- dstid
|
588 |
|
|
outboundDat_o <= dstid_i;
|
589 |
|
|
packetIndex <= packetIndex + 1;
|
590 |
|
|
when 2 =>
|
591 |
|
|
-- srcid
|
592 |
|
|
outboundDat_o <= srcid_i;
|
593 |
|
|
packetIndex <= packetIndex + 1;
|
594 |
|
|
when 3 =>
|
595 |
|
|
-- transaction & size & srcTID & hop & config_offset(20:13)
|
596 |
|
|
outboundDat_o <= "0001" & size_i & tid_i & hop_i & offset_i(20 downto 13);
|
597 |
|
|
packetIndex <= packetIndex + 1;
|
598 |
|
|
when 4 =>
|
599 |
|
|
-- config_offset(12:0) & wdptr & rsrv & double-wordN(63:48)
|
600 |
|
|
outboundDat_o <= offset_i(12 downto 0) & wdptr_i & "00" & payload_i(63 downto 48);
|
601 |
|
|
packetIndex <= packetIndex + 1;
|
602 |
|
|
when 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 =>
|
603 |
|
|
-- double-wordN(47:16)
|
604 |
|
|
outboundDat_o <= payload_i(47 downto 16);
|
605 |
|
|
payload <= payload_i(15 downto 0);
|
606 |
|
|
payloadIndex <= std_logic_vector(unsigned(payloadIndex) + 1);
|
607 |
|
|
packetIndex <= packetIndex + 1;
|
608 |
|
|
when 6 | 8 | 10 | 12 | 14 | 16 | 18 =>
|
609 |
|
|
-- double-wordN(15:0) & double-wordN(63:48)
|
610 |
|
|
outboundDat_o <= payload & payload_i(63 downto 48);
|
611 |
|
|
packetIndex <= packetIndex + 1;
|
612 |
|
|
|
613 |
|
|
if (payloadIndex = payloadLength_i) then
|
614 |
|
|
state <= WAIT_COMPLETE;
|
615 |
|
|
end if;
|
616 |
|
|
when others =>
|
617 |
|
|
-- double-wordN(15:0) & double-wordN(63:48)
|
618 |
|
|
outboundDat_o <= payload & x"0000";
|
619 |
|
|
state <= WAIT_COMPLETE;
|
620 |
|
|
end case;
|
621 |
|
|
end if;
|
622 |
|
|
|
623 |
46 |
magro732 |
when READ_RESPONSE =>
|
624 |
|
|
---------------------------------------------------------------------
|
625 |
|
|
--
|
626 |
|
|
---------------------------------------------------------------------
|
627 |
|
|
if (outboundAck_i = '1') then
|
628 |
|
|
case (packetIndex) is
|
629 |
|
|
when 1 =>
|
630 |
47 |
magro732 |
-- dstid
|
631 |
46 |
magro732 |
outboundDat_o <= dstid_i;
|
632 |
|
|
packetIndex <= packetIndex + 1;
|
633 |
|
|
when 2 =>
|
634 |
47 |
magro732 |
-- srcid
|
635 |
46 |
magro732 |
outboundDat_o <= srcid_i;
|
636 |
|
|
packetIndex <= packetIndex + 1;
|
637 |
|
|
when 3 =>
|
638 |
|
|
-- transaction & status & targetTID & hop & reserved(7:0)
|
639 |
|
|
outboundDat_o <= "0010" & status_i & tid_i & hop_i & x"00";
|
640 |
|
|
packetIndex <= packetIndex + 1;
|
641 |
|
|
when 4 =>
|
642 |
|
|
-- reserved(15:0) & double-wordN(63:48)
|
643 |
47 |
magro732 |
outboundDat_o <= x"0000" & payload_i(63 downto 48);
|
644 |
46 |
magro732 |
packetIndex <= packetIndex + 1;
|
645 |
47 |
magro732 |
when 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 =>
|
646 |
46 |
magro732 |
-- double-wordN(47:16)
|
647 |
47 |
magro732 |
outboundDat_o <= payload_i(47 downto 16);
|
648 |
|
|
payload <= payload_i(15 downto 0);
|
649 |
|
|
payloadIndex <= std_logic_vector(unsigned(payloadIndex) + 1);
|
650 |
46 |
magro732 |
packetIndex <= packetIndex + 1;
|
651 |
47 |
magro732 |
when 6 | 8 | 10 | 12 | 14 | 16 | 18 =>
|
652 |
46 |
magro732 |
-- double-wordN(15:0) & double-wordN(63:48)
|
653 |
47 |
magro732 |
outboundDat_o <= payload & payload_i(63 downto 48);
|
654 |
|
|
packetIndex <= packetIndex + 1;
|
655 |
|
|
|
656 |
|
|
if (payloadIndex = payloadLength_i) then
|
657 |
46 |
magro732 |
state <= WAIT_COMPLETE;
|
658 |
|
|
end if;
|
659 |
|
|
when others =>
|
660 |
47 |
magro732 |
-- double-wordN(15:0) & double-wordN(63:48)
|
661 |
|
|
outboundDat_o <= payload & x"0000";
|
662 |
|
|
state <= WAIT_COMPLETE;
|
663 |
46 |
magro732 |
end case;
|
664 |
|
|
end if;
|
665 |
|
|
|
666 |
|
|
when WRITE_RESPONSE =>
|
667 |
|
|
---------------------------------------------------------------------
|
668 |
|
|
--
|
669 |
|
|
---------------------------------------------------------------------
|
670 |
|
|
if (outboundAck_i = '1') then
|
671 |
|
|
case (packetIndex) is
|
672 |
|
|
when 1 =>
|
673 |
47 |
magro732 |
-- dstid
|
674 |
46 |
magro732 |
outboundDat_o <= dstid_i;
|
675 |
|
|
packetIndex <= packetIndex + 1;
|
676 |
|
|
when 2 =>
|
677 |
47 |
magro732 |
-- srcid
|
678 |
46 |
magro732 |
outboundDat_o <= srcid_i;
|
679 |
|
|
packetIndex <= packetIndex + 1;
|
680 |
|
|
when 3 =>
|
681 |
|
|
-- transaction & status & targetTID & hop & reserved(7:0)
|
682 |
|
|
outboundDat_o <= "0011" & status_i & tid_i & hop_i & x"00";
|
683 |
|
|
packetIndex <= packetIndex + 1;
|
684 |
|
|
when others =>
|
685 |
|
|
-- reserved(15:0) & crc(15:0)
|
686 |
|
|
outboundDat_o <= x"00000000";
|
687 |
|
|
packetIndex <= packetIndex + 1;
|
688 |
|
|
state <= WAIT_COMPLETE;
|
689 |
|
|
end case;
|
690 |
|
|
end if;
|
691 |
|
|
|
692 |
|
|
when WAIT_COMPLETE =>
|
693 |
|
|
-------------------------------------------------------------------
|
694 |
|
|
--
|
695 |
|
|
-------------------------------------------------------------------
|
696 |
|
|
if (outboundAck_i = '1') then
|
697 |
|
|
outboundCyc_o <= '0';
|
698 |
|
|
outboundStb_o <= '0';
|
699 |
|
|
state <= RESPONSE_DONE;
|
700 |
|
|
end if;
|
701 |
|
|
|
702 |
|
|
when RESPONSE_DONE =>
|
703 |
|
|
---------------------------------------------------------------------
|
704 |
|
|
--
|
705 |
|
|
---------------------------------------------------------------------
|
706 |
47 |
magro732 |
if ((readRequestReady_i = '0') and (writeRequestReady_i = '0') and
|
707 |
|
|
(readResponseReady_i = '0') and (writeResponseReady_i = '0')) then
|
708 |
46 |
magro732 |
state <= WAIT_PACKET;
|
709 |
|
|
done_o <= '0';
|
710 |
|
|
else
|
711 |
|
|
done_o <= '1';
|
712 |
|
|
end if;
|
713 |
|
|
|
714 |
|
|
when others =>
|
715 |
|
|
---------------------------------------------------------------------
|
716 |
|
|
--
|
717 |
|
|
---------------------------------------------------------------------
|
718 |
|
|
state <= WAIT_PACKET;
|
719 |
|
|
|
720 |
|
|
end case;
|
721 |
|
|
end if;
|
722 |
|
|
end if;
|
723 |
|
|
end process;
|
724 |
|
|
|
725 |
|
|
end architecture;
|