caf6786ad5
This patch makes the address mapper less stringent about checking the before and after ranges, i.e. the original and remapped ranges. The checks were not really necessary, and there are situations when the previous checks were too strict.
274 lines
7.6 KiB
C++
274 lines
7.6 KiB
C++
/*
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* Copyright (c) 2012 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Andreas Hansson
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*/
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#include "mem/addr_mapper.hh"
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AddrMapper::AddrMapper(const AddrMapperParams* p)
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: MemObject(p),
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masterPort(name() + "-master", *this),
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slavePort(name() + "-slave", *this)
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{
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}
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void
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AddrMapper::init()
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{
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if (!slavePort.isConnected() || !masterPort.isConnected())
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fatal("Address mapper is not connected on both sides.\n");
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if ((slavePort.peerBlockSize() != masterPort.peerBlockSize()) &&
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slavePort.peerBlockSize() && masterPort.peerBlockSize())
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fatal("Slave port size %d, master port size %d \n "
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"don't have the same block size... Not supported.\n",
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slavePort.peerBlockSize(), masterPort.peerBlockSize());
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}
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BaseMasterPort&
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AddrMapper::getMasterPort(const std::string& if_name, PortID idx)
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{
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if (if_name == "master") {
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return masterPort;
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} else {
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return MemObject::getMasterPort(if_name, idx);
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}
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}
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BaseSlavePort&
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AddrMapper::getSlavePort(const std::string& if_name, PortID idx)
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{
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if (if_name == "slave") {
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return slavePort;
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} else {
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return MemObject::getSlavePort(if_name, idx);
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}
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}
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void
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AddrMapper::recvFunctional(PacketPtr pkt)
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{
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Addr orig_addr = pkt->getAddr();
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pkt->setAddr(remapAddr(orig_addr));
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masterPort.sendFunctional(pkt);
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pkt->setAddr(orig_addr);
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}
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void
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AddrMapper::recvFunctionalSnoop(PacketPtr pkt)
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{
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Addr orig_addr = pkt->getAddr();
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pkt->setAddr(remapAddr(orig_addr));
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slavePort.sendFunctionalSnoop(pkt);
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pkt->setAddr(orig_addr);
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}
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Tick
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AddrMapper::recvAtomic(PacketPtr pkt)
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{
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Addr orig_addr = pkt->getAddr();
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pkt->setAddr(remapAddr(orig_addr));
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Tick ret_tick = masterPort.sendAtomic(pkt);
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pkt->setAddr(orig_addr);
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return ret_tick;
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}
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Tick
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AddrMapper::recvAtomicSnoop(PacketPtr pkt)
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{
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Addr orig_addr = pkt->getAddr();
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pkt->setAddr(remapAddr(orig_addr));
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Tick ret_tick = slavePort.sendAtomicSnoop(pkt);
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pkt->setAddr(orig_addr);
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return ret_tick;
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}
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bool
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AddrMapper::recvTimingReq(PacketPtr pkt)
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{
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Addr orig_addr = pkt->getAddr();
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bool needsResponse = pkt->needsResponse();
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bool memInhibitAsserted = pkt->memInhibitAsserted();
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Packet::SenderState* senderState = pkt->senderState;
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if (needsResponse && !memInhibitAsserted) {
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pkt->senderState = new AddrMapperSenderState(senderState, orig_addr);
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}
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pkt->setAddr(remapAddr(orig_addr));
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// Attempt to send the packet (always succeeds for inhibited
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// packets)
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bool successful = masterPort.sendTimingReq(pkt);
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// If not successful, restore the sender state
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if (!successful && needsResponse) {
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delete pkt->senderState;
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pkt->senderState = senderState;
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}
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return successful;
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}
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bool
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AddrMapper::recvTimingResp(PacketPtr pkt)
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{
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AddrMapperSenderState* receivedState =
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dynamic_cast<AddrMapperSenderState*>(pkt->senderState);
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// Restore initial sender state
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if (receivedState == NULL)
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panic("AddrMapper %s got a response without sender state\n",
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name());
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Addr remapped_addr = pkt->getAddr();
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// Restore the state and address
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pkt->senderState = receivedState->origSenderState;
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pkt->setAddr(receivedState->origAddr);
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// Attempt to send the packet
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bool successful = slavePort.sendTimingResp(pkt);
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// If packet successfully sent, delete the sender state, otherwise
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// restore state
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if (successful) {
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delete receivedState;
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} else {
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// Don't delete anything and let the packet look like we did
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// not touch it
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pkt->senderState = receivedState;
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pkt->setAddr(remapped_addr);
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}
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return successful;
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}
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void
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AddrMapper::recvTimingSnoopReq(PacketPtr pkt)
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{
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slavePort.sendTimingSnoopReq(pkt);
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}
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bool
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AddrMapper::recvTimingSnoopResp(PacketPtr pkt)
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{
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return masterPort.sendTimingSnoopResp(pkt);
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}
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bool
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AddrMapper::isSnooping() const
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{
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if (slavePort.isSnooping())
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fatal("AddrMapper doesn't support remapping of snooping requests\n");
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return false;
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}
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unsigned
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AddrMapper::deviceBlockSizeMaster()
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{
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return slavePort.peerBlockSize();
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}
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unsigned
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AddrMapper::deviceBlockSizeSlave()
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{
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return masterPort.peerBlockSize();
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}
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void
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AddrMapper::recvRetryMaster()
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{
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slavePort.sendRetry();
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}
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void
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AddrMapper::recvRetrySlave()
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{
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masterPort.sendRetry();
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}
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void
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AddrMapper::recvRangeChange()
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{
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slavePort.sendRangeChange();
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}
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RangeAddrMapper::RangeAddrMapper(const RangeAddrMapperParams* p) :
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AddrMapper(p),
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originalRanges(p->original_ranges),
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remappedRanges(p->remapped_ranges)
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{
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if (originalRanges.size() != remappedRanges.size())
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fatal("AddrMapper: original and shadowed range list must "
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"be same size\n");
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for (size_t x = 0; x < originalRanges.size(); x++) {
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if (originalRanges[x].size() != remappedRanges[x].size())
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fatal("AddrMapper: original and shadowed range list elements"
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" aren't all of the same size\n");
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}
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}
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RangeAddrMapper*
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RangeAddrMapperParams::create()
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{
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return new RangeAddrMapper(this);
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}
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Addr
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RangeAddrMapper::remapAddr(Addr addr) const
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{
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for (int i = 0; i < originalRanges.size(); ++i) {
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if (originalRanges[i].contains(addr)) {
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Addr offset = addr - originalRanges[i].start();
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return offset + remappedRanges[i].start();
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}
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}
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return addr;
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}
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AddrRangeList
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RangeAddrMapper::getAddrRanges() const
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{
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// Simply return the original ranges as given by the parameters
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AddrRangeList ranges(originalRanges.begin(), originalRanges.end());
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return ranges;
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}
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