addr_mapper.cc revision 9542
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 if ((slavePort.peerBlockSize() != masterPort.peerBlockSize()) && 56 slavePort.peerBlockSize() && masterPort.peerBlockSize()) 57 fatal("Slave port size %d, master port size %d \n " 58 "don't have the same block size... Not supported.\n", 59 slavePort.peerBlockSize(), masterPort.peerBlockSize()); 60} 61 62BaseMasterPort& 63AddrMapper::getMasterPort(const std::string& if_name, PortID idx) 64{ 65 if (if_name == "master") { 66 return masterPort; 67 } else { 68 return MemObject::getMasterPort(if_name, idx); 69 } 70} 71 72BaseSlavePort& 73AddrMapper::getSlavePort(const std::string& if_name, PortID idx) 74{ 75 if (if_name == "slave") { 76 return slavePort; 77 } else { 78 return MemObject::getSlavePort(if_name, idx); 79 } 80} 81 82void 83AddrMapper::recvFunctional(PacketPtr pkt) 84{ 85 Addr orig_addr = pkt->getAddr(); 86 pkt->setAddr(remapAddr(orig_addr)); 87 masterPort.sendFunctional(pkt); 88 pkt->setAddr(orig_addr); 89} 90 91void 92AddrMapper::recvFunctionalSnoop(PacketPtr pkt) 93{ 94 Addr orig_addr = pkt->getAddr(); 95 pkt->setAddr(remapAddr(orig_addr)); 96 slavePort.sendFunctionalSnoop(pkt); 97 pkt->setAddr(orig_addr); 98} 99 100Tick 101AddrMapper::recvAtomic(PacketPtr pkt) 102{ 103 Addr orig_addr = pkt->getAddr(); 104 pkt->setAddr(remapAddr(orig_addr)); 105 Tick ret_tick = masterPort.sendAtomic(pkt); 106 pkt->setAddr(orig_addr); 107 return ret_tick; 108} 109 110Tick 111AddrMapper::recvAtomicSnoop(PacketPtr pkt) 112{ 113 Addr orig_addr = pkt->getAddr(); 114 pkt->setAddr(remapAddr(orig_addr)); 115 Tick ret_tick = slavePort.sendAtomicSnoop(pkt); 116 pkt->setAddr(orig_addr); 117 return ret_tick; 118} 119 120bool 121AddrMapper::recvTimingReq(PacketPtr pkt) 122{ 123 Addr orig_addr = pkt->getAddr(); 124 bool needsResponse = pkt->needsResponse(); 125 bool memInhibitAsserted = pkt->memInhibitAsserted(); 126 127 if (needsResponse && !memInhibitAsserted) { 128 pkt->pushSenderState(new AddrMapperSenderState(orig_addr)); 129 } 130 131 pkt->setAddr(remapAddr(orig_addr)); 132 133 // Attempt to send the packet (always succeeds for inhibited 134 // packets) 135 bool successful = masterPort.sendTimingReq(pkt); 136 137 // If not successful, restore the sender state 138 if (!successful && needsResponse) { 139 delete pkt->popSenderState(); 140 } 141 142 return successful; 143} 144 145bool 146AddrMapper::recvTimingResp(PacketPtr pkt) 147{ 148 AddrMapperSenderState* receivedState = 149 dynamic_cast<AddrMapperSenderState*>(pkt->senderState); 150 151 // Restore initial sender state 152 if (receivedState == NULL) 153 panic("AddrMapper %s got a response without sender state\n", 154 name()); 155 156 Addr remapped_addr = pkt->getAddr(); 157 158 // Restore the state and address 159 pkt->senderState = receivedState->predecessor; 160 pkt->setAddr(receivedState->origAddr); 161 162 // Attempt to send the packet 163 bool successful = slavePort.sendTimingResp(pkt); 164 165 // If packet successfully sent, delete the sender state, otherwise 166 // restore state 167 if (successful) { 168 delete receivedState; 169 } else { 170 // Don't delete anything and let the packet look like we did 171 // not touch it 172 pkt->senderState = receivedState; 173 pkt->setAddr(remapped_addr); 174 } 175 return successful; 176} 177 178void 179AddrMapper::recvTimingSnoopReq(PacketPtr pkt) 180{ 181 slavePort.sendTimingSnoopReq(pkt); 182} 183 184bool 185AddrMapper::recvTimingSnoopResp(PacketPtr pkt) 186{ 187 return masterPort.sendTimingSnoopResp(pkt); 188} 189 190bool 191AddrMapper::isSnooping() const 192{ 193 if (slavePort.isSnooping()) 194 fatal("AddrMapper doesn't support remapping of snooping requests\n"); 195 return false; 196} 197 198unsigned 199AddrMapper::deviceBlockSizeMaster() 200{ 201 return slavePort.peerBlockSize(); 202} 203 204unsigned 205AddrMapper::deviceBlockSizeSlave() 206{ 207 return masterPort.peerBlockSize(); 208} 209 210void 211AddrMapper::recvRetryMaster() 212{ 213 slavePort.sendRetry(); 214} 215 216void 217AddrMapper::recvRetrySlave() 218{ 219 masterPort.sendRetry(); 220} 221 222void 223AddrMapper::recvRangeChange() 224{ 225 slavePort.sendRangeChange(); 226} 227 228RangeAddrMapper::RangeAddrMapper(const RangeAddrMapperParams* p) : 229 AddrMapper(p), 230 originalRanges(p->original_ranges), 231 remappedRanges(p->remapped_ranges) 232{ 233 if (originalRanges.size() != remappedRanges.size()) 234 fatal("AddrMapper: original and shadowed range list must " 235 "be same size\n"); 236 237 for (size_t x = 0; x < originalRanges.size(); x++) { 238 if (originalRanges[x].size() != remappedRanges[x].size()) 239 fatal("AddrMapper: original and shadowed range list elements" 240 " aren't all of the same size\n"); 241 } 242} 243 244RangeAddrMapper* 245RangeAddrMapperParams::create() 246{ 247 return new RangeAddrMapper(this); 248} 249 250Addr 251RangeAddrMapper::remapAddr(Addr addr) const 252{ 253 for (int i = 0; i < originalRanges.size(); ++i) { 254 if (originalRanges[i].contains(addr)) { 255 Addr offset = addr - originalRanges[i].start(); 256 return offset + remappedRanges[i].start(); 257 } 258 } 259 260 return addr; 261} 262 263AddrRangeList 264RangeAddrMapper::getAddrRanges() const 265{ 266 // Simply return the original ranges as given by the parameters 267 AddrRangeList ranges(originalRanges.begin(), originalRanges.end()); 268 return ranges; 269} 270 271 272