src/mem/protocol/RubySlicc_MemControl.sm

   1
   2 /*
   3  * Copyright (c) 1999-2005 Mark D. Hill and David A. Wood
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met: redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer;
  10  * redistributions in binary form must reproduce the above copyright
  11  * notice, this list of conditions and the following disclaimer in the
  12  * documentation and/or other materials provided with the distribution;
  13  * neither the name of the copyright holders nor the names of its
  14  * contributors may be used to endorse or promote products derived from
  15  * this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 /*
  31  * $Id$
  32  *
  33  */
  34
  35 // MemoryRequestType used in MemoryMsg
  36
  37 enumeration(MemoryRequestType, desc="...") {
  38
  39   // Southbound request: from directory to memory cache
  40   // or directory to memory or memory cache to memory
  41   MEMORY_READ,     desc="Read request to memory";
  42   MEMORY_WB,       desc="Write back data to memory";
  43
  44   // response from memory to directory
  45   // (These are currently unused!)
  46   MEMORY_DATA, desc="Data read from memory";
  47   MEMORY_ACK,  desc="Write to memory acknowledgement";
  48 }
  49
  50
  51 // Message to and from Memory Control
  52
  53 structure(MemoryMsg, desc="...", interface="Message") {
  54   Address Address,              desc="Physical address for this request";
  55   MemoryRequestType Type,       desc="Type of memory request (MEMORY_READ or MEMORY_WB)";
  56   MachineID Sender,             desc="What component sent the data";
  57   MachineID OriginalRequestorMachId, desc="What component originally requested";
  58   DataBlock DataBlk,            desc="Data to writeback";
  59   MessageSizeType MessageSize,  desc="size category of the message";
  60   // Not all fields used by all protocols:
  61   PrefetchBit Prefetch,         desc="Is this a prefetch request";
  62   bool ReadX,                   desc="Exclusive";
  63   int Acks,                     desc="How many acks to expect";
  64
  65
  66 }
  67