addr_mapper.cc revision 11284
1/* 2 * Copyright (c) 2012 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Andreas Hansson 38 */ 39 40#include "mem/addr_mapper.hh" 41 42AddrMapper::AddrMapper(const AddrMapperParams* p) 43 : MemObject(p), 44 masterPort(name() + "-master", *this), 45 slavePort(name() + "-slave", *this) 46{ 47} 48 49void 50AddrMapper::init() 51{ 52 if (!slavePort.isConnected() || !masterPort.isConnected()) 53 fatal("Address mapper is not connected on both sides.\n"); 54} 55 56BaseMasterPort& 57AddrMapper::getMasterPort(const std::string& if_name, PortID idx) 58{ 59 if (if_name == "master") { 60 return masterPort; 61 } else { 62 return MemObject::getMasterPort(if_name, idx); 63 } 64} 65 66BaseSlavePort& 67AddrMapper::getSlavePort(const std::string& if_name, PortID idx) 68{ 69 if (if_name == "slave") { 70 return slavePort; 71 } else { 72 return MemObject::getSlavePort(if_name, idx); 73 } 74} 75 76void 77AddrMapper::recvFunctional(PacketPtr pkt) 78{ 79 Addr orig_addr = pkt->getAddr(); 80 pkt->setAddr(remapAddr(orig_addr)); 81 masterPort.sendFunctional(pkt); 82 pkt->setAddr(orig_addr); 83} 84 85void 86AddrMapper::recvFunctionalSnoop(PacketPtr pkt) 87{ 88 Addr orig_addr = pkt->getAddr(); 89 pkt->setAddr(remapAddr(orig_addr)); 90 slavePort.sendFunctionalSnoop(pkt); 91 pkt->setAddr(orig_addr); 92} 93 94Tick 95AddrMapper::recvAtomic(PacketPtr pkt) 96{ 97 Addr orig_addr = pkt->getAddr(); 98 pkt->setAddr(remapAddr(orig_addr)); 99 Tick ret_tick = masterPort.sendAtomic(pkt); 100 pkt->setAddr(orig_addr); 101 return ret_tick; 102} 103 104Tick 105AddrMapper::recvAtomicSnoop(PacketPtr pkt) 106{ 107 Addr orig_addr = pkt->getAddr(); 108 pkt->setAddr(remapAddr(orig_addr)); 109 Tick ret_tick = slavePort.sendAtomicSnoop(pkt); 110 pkt->setAddr(orig_addr); 111 return ret_tick; 112} 113 114bool 115AddrMapper::recvTimingReq(PacketPtr pkt) 116{ 117 Addr orig_addr = pkt->getAddr(); 118 bool needsResponse = pkt->needsResponse(); 119 bool cacheResponding = pkt->cacheResponding(); 120 121 if (needsResponse && !cacheResponding) { 122 pkt->pushSenderState(new AddrMapperSenderState(orig_addr)); 123 } 124 125 pkt->setAddr(remapAddr(orig_addr)); 126 127 // Attempt to send the packet 128 bool successful = masterPort.sendTimingReq(pkt); 129 130 // If not successful, restore the address and sender state 131 if (!successful) { 132 pkt->setAddr(orig_addr); 133 134 if (needsResponse) { 135 delete pkt->popSenderState(); 136 } 137 } 138 139 return successful; 140} 141 142bool 143AddrMapper::recvTimingResp(PacketPtr pkt) 144{ 145 AddrMapperSenderState* receivedState = 146 dynamic_cast<AddrMapperSenderState*>(pkt->senderState); 147 148 // Restore initial sender state 149 if (receivedState == NULL) 150 panic("AddrMapper %s got a response without sender state\n", 151 name()); 152 153 Addr remapped_addr = pkt->getAddr(); 154 155 // Restore the state and address 156 pkt->senderState = receivedState->predecessor; 157 pkt->setAddr(receivedState->origAddr); 158 159 // Attempt to send the packet 160 bool successful = slavePort.sendTimingResp(pkt); 161 162 // If packet successfully sent, delete the sender state, otherwise 163 // restore state 164 if (successful) { 165 delete receivedState; 166 } else { 167 // Don't delete anything and let the packet look like we did 168 // not touch it 169 pkt->senderState = receivedState; 170 pkt->setAddr(remapped_addr); 171 } 172 return successful; 173} 174 175void 176AddrMapper::recvTimingSnoopReq(PacketPtr pkt) 177{ 178 slavePort.sendTimingSnoopReq(pkt); 179} 180 181bool 182AddrMapper::recvTimingSnoopResp(PacketPtr pkt) 183{ 184 return masterPort.sendTimingSnoopResp(pkt); 185} 186 187bool 188AddrMapper::isSnooping() const 189{ 190 if (slavePort.isSnooping()) 191 fatal("AddrMapper doesn't support remapping of snooping requests\n"); 192 return false; 193} 194 195void 196AddrMapper::recvReqRetry() 197{ 198 slavePort.sendRetryReq(); 199} 200 201void 202AddrMapper::recvRespRetry() 203{ 204 masterPort.sendRetryResp(); 205} 206 207void 208AddrMapper::recvRangeChange() 209{ 210 slavePort.sendRangeChange(); 211} 212 213RangeAddrMapper::RangeAddrMapper(const RangeAddrMapperParams* p) : 214 AddrMapper(p), 215 originalRanges(p->original_ranges), 216 remappedRanges(p->remapped_ranges) 217{ 218 if (originalRanges.size() != remappedRanges.size()) 219 fatal("AddrMapper: original and shadowed range list must " 220 "be same size\n"); 221 222 for (size_t x = 0; x < originalRanges.size(); x++) { 223 if (originalRanges[x].size() != remappedRanges[x].size()) 224 fatal("AddrMapper: original and shadowed range list elements" 225 " aren't all of the same size\n"); 226 } 227} 228 229RangeAddrMapper* 230RangeAddrMapperParams::create() 231{ 232 return new RangeAddrMapper(this); 233} 234 235Addr 236RangeAddrMapper::remapAddr(Addr addr) const 237{ 238 for (int i = 0; i < originalRanges.size(); ++i) { 239 if (originalRanges[i].contains(addr)) { 240 Addr offset = addr - originalRanges[i].start(); 241 return offset + remappedRanges[i].start(); 242 } 243 } 244 245 return addr; 246} 247 248AddrRangeList 249RangeAddrMapper::getAddrRanges() const 250{ 251 // Simply return the original ranges as given by the parameters 252 AddrRangeList ranges(originalRanges.begin(), originalRanges.end()); 253 return ranges; 254} 255 256 257