addr_mapper.cc revision 10862
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 memInhibitAsserted = pkt->memInhibitAsserted(); 120 121 if (needsResponse && !memInhibitAsserted) { 122 pkt->pushSenderState(new AddrMapperSenderState(orig_addr)); 123 } 124 125 pkt->setAddr(remapAddr(orig_addr)); 126 127 // Attempt to send the packet (always succeeds for inhibited 128 // packets) 129 bool successful = masterPort.sendTimingReq(pkt); 130 131 // If not successful, restore the address and sender state 132 if (!successful) { 133 pkt->setAddr(orig_addr); 134 135 if (needsResponse) { 136 delete pkt->popSenderState(); 137 } 138 } 139 140 return successful; 141} 142 143bool 144AddrMapper::recvTimingResp(PacketPtr pkt) 145{ 146 AddrMapperSenderState* receivedState = 147 dynamic_cast<AddrMapperSenderState*>(pkt->senderState); 148 149 // Restore initial sender state 150 if (receivedState == NULL) 151 panic("AddrMapper %s got a response without sender state\n", 152 name()); 153 154 Addr remapped_addr = pkt->getAddr(); 155 156 // Restore the state and address 157 pkt->senderState = receivedState->predecessor; 158 pkt->setAddr(receivedState->origAddr); 159 160 // Attempt to send the packet 161 bool successful = slavePort.sendTimingResp(pkt); 162 163 // If packet successfully sent, delete the sender state, otherwise 164 // restore state 165 if (successful) { 166 delete receivedState; 167 } else { 168 // Don't delete anything and let the packet look like we did 169 // not touch it 170 pkt->senderState = receivedState; 171 pkt->setAddr(remapped_addr); 172 } 173 return successful; 174} 175 176void 177AddrMapper::recvTimingSnoopReq(PacketPtr pkt) 178{ 179 slavePort.sendTimingSnoopReq(pkt); 180} 181 182bool 183AddrMapper::recvTimingSnoopResp(PacketPtr pkt) 184{ 185 return masterPort.sendTimingSnoopResp(pkt); 186} 187 188bool 189AddrMapper::isSnooping() const 190{ 191 if (slavePort.isSnooping()) 192 fatal("AddrMapper doesn't support remapping of snooping requests\n"); 193 return false; 194} 195 196void 197AddrMapper::recvReqRetry() 198{ 199 slavePort.sendRetryReq(); 200} 201 202void 203AddrMapper::recvRespRetry() 204{ 205 masterPort.sendRetryResp(); 206} 207 208void 209AddrMapper::recvRangeChange() 210{ 211 slavePort.sendRangeChange(); 212} 213 214RangeAddrMapper::RangeAddrMapper(const RangeAddrMapperParams* p) : 215 AddrMapper(p), 216 originalRanges(p->original_ranges), 217 remappedRanges(p->remapped_ranges) 218{ 219 if (originalRanges.size() != remappedRanges.size()) 220 fatal("AddrMapper: original and shadowed range list must " 221 "be same size\n"); 222 223 for (size_t x = 0; x < originalRanges.size(); x++) { 224 if (originalRanges[x].size() != remappedRanges[x].size()) 225 fatal("AddrMapper: original and shadowed range list elements" 226 " aren't all of the same size\n"); 227 } 228} 229 230RangeAddrMapper* 231RangeAddrMapperParams::create() 232{ 233 return new RangeAddrMapper(this); 234} 235 236Addr 237RangeAddrMapper::remapAddr(Addr addr) const 238{ 239 for (int i = 0; i < originalRanges.size(); ++i) { 240 if (originalRanges[i].contains(addr)) { 241 Addr offset = addr - originalRanges[i].start(); 242 return offset + remappedRanges[i].start(); 243 } 244 } 245 246 return addr; 247} 248 249AddrRangeList 250RangeAddrMapper::getAddrRanges() const 251{ 252 // Simply return the original ranges as given by the parameters 253 AddrRangeList ranges(originalRanges.begin(), originalRanges.end()); 254 return ranges; 255} 256 257 258