coherent_xbar.cc revision 2497
15647Sgblack@eecs.umich.edu/* 25647Sgblack@eecs.umich.edu * Copyright (c) 2006 The Regents of The University of Michigan 35647Sgblack@eecs.umich.edu * All rights reserved. 45647Sgblack@eecs.umich.edu * 55647Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 65647Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 75647Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 85647Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 95647Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 105647Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 115647Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 125647Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 135647Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 145647Sgblack@eecs.umich.edu * this software without specific prior written permission. 155647Sgblack@eecs.umich.edu * 165647Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 175647Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 185647Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 195647Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 205647Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 215647Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 225647Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235647Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245647Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255647Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 265647Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275647Sgblack@eecs.umich.edu */ 285647Sgblack@eecs.umich.edu 295647Sgblack@eecs.umich.edu/** 305647Sgblack@eecs.umich.edu * @file Definition of a bus object. 315647Sgblack@eecs.umich.edu */ 325647Sgblack@eecs.umich.edu 335647Sgblack@eecs.umich.edu 345647Sgblack@eecs.umich.edu#include "bus.hh" 355647Sgblack@eecs.umich.edu#include "sim/builder.hh" 365647Sgblack@eecs.umich.edu 375647Sgblack@eecs.umich.edu/** Function called by the port when the bus is recieving a Timing 385647Sgblack@eecs.umich.edu * transaction.*/ 395647Sgblack@eecs.umich.edubool 405647Sgblack@eecs.umich.eduBus::recvTiming(Packet &pkt, int id) 415647Sgblack@eecs.umich.edu{ 425647Sgblack@eecs.umich.edu 435647Sgblack@eecs.umich.edu panic("I need to be implemented, but not right now."); 445647Sgblack@eecs.umich.edu} 455647Sgblack@eecs.umich.edu 465647Sgblack@eecs.umich.eduPort * 475647Sgblack@eecs.umich.eduBus::findPort(Addr addr, int id) 485647Sgblack@eecs.umich.edu{ 495647Sgblack@eecs.umich.edu /* An interval tree would be a better way to do this. --ali. */ 505647Sgblack@eecs.umich.edu int dest_id = -1; 515647Sgblack@eecs.umich.edu int i = 0; 525647Sgblack@eecs.umich.edu bool found = false; 535647Sgblack@eecs.umich.edu 545647Sgblack@eecs.umich.edu while (i < portList.size() && !found) 555647Sgblack@eecs.umich.edu { 565647Sgblack@eecs.umich.edu if (portList[i].range == addr) { 575647Sgblack@eecs.umich.edu dest_id = portList[i].portId; 585648Sgblack@eecs.umich.edu found = true; 595647Sgblack@eecs.umich.edu } 605654Sgblack@eecs.umich.edu } 615647Sgblack@eecs.umich.edu assert(dest_id != -1 && "Unable to find destination"); 625654Sgblack@eecs.umich.edu // we shouldn't be sending this back to where it came from 636046Sgblack@eecs.umich.edu assert(dest_id != id); 645647Sgblack@eecs.umich.edu 655648Sgblack@eecs.umich.edu return interfaces[dest_id]; 665648Sgblack@eecs.umich.edu} 675647Sgblack@eecs.umich.edu 685647Sgblack@eecs.umich.edu/** Function called by the port when the bus is recieving a Atomic 695647Sgblack@eecs.umich.edu * transaction.*/ 705647Sgblack@eecs.umich.eduTick 715647Sgblack@eecs.umich.eduBus::recvAtomic(Packet &pkt, int id) 725647Sgblack@eecs.umich.edu{ 735647Sgblack@eecs.umich.edu return findPort(pkt.addr, id)->sendAtomic(pkt); 745647Sgblack@eecs.umich.edu} 755647Sgblack@eecs.umich.edu 765648Sgblack@eecs.umich.edu/** Function called by the port when the bus is recieving a Functional 775647Sgblack@eecs.umich.edu * transaction.*/ 785648Sgblack@eecs.umich.eduvoid 795648Sgblack@eecs.umich.eduBus::recvFunctional(Packet &pkt, int id) 805648Sgblack@eecs.umich.edu{ 815648Sgblack@eecs.umich.edu findPort(pkt.addr, id)->sendFunctional(pkt); 825648Sgblack@eecs.umich.edu} 835648Sgblack@eecs.umich.edu 845648Sgblack@eecs.umich.edu/** Function called by the port when the bus is recieving a status change.*/ 855648Sgblack@eecs.umich.eduvoid 865648Sgblack@eecs.umich.eduBus::recvStatusChange(Port::Status status, int id) 875648Sgblack@eecs.umich.edu{ 885648Sgblack@eecs.umich.edu assert(status == Port:: RangeChange && 895648Sgblack@eecs.umich.edu "The other statuses need to be implemented."); 905648Sgblack@eecs.umich.edu Port *port = interfaces[id]; 915648Sgblack@eecs.umich.edu AddrRangeList ranges; 925648Sgblack@eecs.umich.edu bool owner; 935648Sgblack@eecs.umich.edu 945648Sgblack@eecs.umich.edu port->getPeerAddressRanges(ranges, owner); 955648Sgblack@eecs.umich.edu // not dealing with snooping yet either 965648Sgblack@eecs.umich.edu assert(owner == true); 975648Sgblack@eecs.umich.edu // or multiple ranges 985648Sgblack@eecs.umich.edu assert(ranges.size() == 1); 995648Sgblack@eecs.umich.edu DevMap dm; 1005648Sgblack@eecs.umich.edu dm.portId = id; 1015648Sgblack@eecs.umich.edu dm.range = ranges.front(); 1025648Sgblack@eecs.umich.edu 1035648Sgblack@eecs.umich.edu portList.push_back(dm); 1045648Sgblack@eecs.umich.edu} 1055648Sgblack@eecs.umich.edu 1065648Sgblack@eecs.umich.eduvoid 1075648Sgblack@eecs.umich.eduBus::BusPort::addressRanges(AddrRangeList &range_list, bool &owner) 1085648Sgblack@eecs.umich.edu{ 1095648Sgblack@eecs.umich.edu panic("I'm not implemented.\n"); 1105648Sgblack@eecs.umich.edu} 1115648Sgblack@eecs.umich.edu 1125648Sgblack@eecs.umich.eduBEGIN_DECLARE_SIM_OBJECT_PARAMS(Bus) 1135648Sgblack@eecs.umich.edu 1145648Sgblack@eecs.umich.edu Param<int> bus_id; 1155648Sgblack@eecs.umich.edu 1165648Sgblack@eecs.umich.eduEND_DECLARE_SIM_OBJECT_PARAMS(Bus) 1175648Sgblack@eecs.umich.edu 1185648Sgblack@eecs.umich.eduBEGIN_INIT_SIM_OBJECT_PARAMS(Bus) 1195648Sgblack@eecs.umich.edu INIT_PARAM(bus_id, "junk bus id") 1205648Sgblack@eecs.umich.eduEND_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) 1215648Sgblack@eecs.umich.edu 1225648Sgblack@eecs.umich.eduCREATE_SIM_OBJECT(Bus) 1235648Sgblack@eecs.umich.edu{ 1245648Sgblack@eecs.umich.edu return new Bus(getInstanceName()); 1255648Sgblack@eecs.umich.edu} 1265648Sgblack@eecs.umich.edu 1275648Sgblack@eecs.umich.eduREGISTER_SIM_OBJECT("Bus", Bus) 1285648Sgblack@eecs.umich.edu