blob: 091b9d56aa9b4cc8e2e246fba619058ad751d0b4 [file] [log] [blame] [edit]
/*
* Copyright (c) 2012 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "mem/addr_mapper.hh"
namespace gem5
{
AddrMapper::AddrMapper(const AddrMapperParams &p)
: SimObject(p),
memSidePort(name() + "-mem_side_port", *this),
cpuSidePort(name() + "-cpu_side_port", *this)
{
}
void
AddrMapper::init()
{
if (!cpuSidePort.isConnected() || !memSidePort.isConnected())
fatal("Address mapper is not connected on both sides.\n");
}
Port &
AddrMapper::getPort(const std::string &if_name, PortID idx)
{
if (if_name == "mem_side_port") {
return memSidePort;
} else if (if_name == "cpu_side_port") {
return cpuSidePort;
} else {
return SimObject::getPort(if_name, idx);
}
}
void
AddrMapper::recvFunctional(PacketPtr pkt)
{
Addr orig_addr = pkt->getAddr();
pkt->setAddr(remapAddr(orig_addr));
memSidePort.sendFunctional(pkt);
pkt->setAddr(orig_addr);
}
void
AddrMapper::recvFunctionalSnoop(PacketPtr pkt)
{
Addr orig_addr = pkt->getAddr();
pkt->setAddr(remapAddr(orig_addr));
cpuSidePort.sendFunctionalSnoop(pkt);
pkt->setAddr(orig_addr);
}
Tick
AddrMapper::recvAtomic(PacketPtr pkt)
{
Addr orig_addr = pkt->getAddr();
pkt->setAddr(remapAddr(orig_addr));
Tick ret_tick = memSidePort.sendAtomic(pkt);
pkt->setAddr(orig_addr);
return ret_tick;
}
Tick
AddrMapper::recvAtomicSnoop(PacketPtr pkt)
{
Addr orig_addr = pkt->getAddr();
pkt->setAddr(remapAddr(orig_addr));
Tick ret_tick = cpuSidePort.sendAtomicSnoop(pkt);
pkt->setAddr(orig_addr);
return ret_tick;
}
bool
AddrMapper::recvTimingReq(PacketPtr pkt)
{
Addr orig_addr = pkt->getAddr();
bool needsResponse = pkt->needsResponse();
bool cacheResponding = pkt->cacheResponding();
if (needsResponse && !cacheResponding) {
pkt->pushSenderState(new AddrMapperSenderState(orig_addr));
}
pkt->setAddr(remapAddr(orig_addr));
// Attempt to send the packet
bool successful = memSidePort.sendTimingReq(pkt);
// If not successful, restore the address and sender state
if (!successful) {
pkt->setAddr(orig_addr);
if (needsResponse) {
delete pkt->popSenderState();
}
}
return successful;
}
bool
AddrMapper::recvTimingResp(PacketPtr pkt)
{
AddrMapperSenderState* receivedState =
dynamic_cast<AddrMapperSenderState*>(pkt->senderState);
// Restore initial sender state
if (receivedState == NULL)
panic("AddrMapper %s got a response without sender state\n",
name());
Addr remapped_addr = pkt->getAddr();
// Restore the state and address
pkt->senderState = receivedState->predecessor;
pkt->setAddr(receivedState->origAddr);
// Attempt to send the packet
bool successful = cpuSidePort.sendTimingResp(pkt);
// If packet successfully sent, delete the sender state, otherwise
// restore state
if (successful) {
delete receivedState;
} else {
// Don't delete anything and let the packet look like we did
// not touch it
pkt->senderState = receivedState;
pkt->setAddr(remapped_addr);
}
return successful;
}
void
AddrMapper::recvTimingSnoopReq(PacketPtr pkt)
{
cpuSidePort.sendTimingSnoopReq(pkt);
}
bool
AddrMapper::recvTimingSnoopResp(PacketPtr pkt)
{
return memSidePort.sendTimingSnoopResp(pkt);
}
bool
AddrMapper::isSnooping() const
{
if (cpuSidePort.isSnooping())
fatal("AddrMapper doesn't support remapping of snooping requests\n");
return false;
}
void
AddrMapper::recvReqRetry()
{
cpuSidePort.sendRetryReq();
}
void
AddrMapper::recvRespRetry()
{
memSidePort.sendRetryResp();
}
void
AddrMapper::recvRangeChange()
{
cpuSidePort.sendRangeChange();
}
RangeAddrMapper::RangeAddrMapper(const RangeAddrMapperParams &p) :
AddrMapper(p),
originalRanges(p.original_ranges),
remappedRanges(p.remapped_ranges)
{
if (originalRanges.size() != remappedRanges.size())
fatal("AddrMapper: original and shadowed range list must "
"be same size\n");
for (size_t x = 0; x < originalRanges.size(); x++) {
if (originalRanges[x].size() != remappedRanges[x].size())
fatal("AddrMapper: original and shadowed range list elements"
" aren't all of the same size\n");
}
}
Addr
RangeAddrMapper::remapAddr(Addr addr) const
{
for (int i = 0; i < originalRanges.size(); ++i) {
if (originalRanges[i].contains(addr)) {
Addr offset = addr - originalRanges[i].start();
return offset + remappedRanges[i].start();
}
}
return addr;
}
AddrRangeList
RangeAddrMapper::getAddrRanges() const
{
// Simply return the original ranges as given by the parameters
AddrRangeList ranges(originalRanges.begin(), originalRanges.end());
return ranges;
}
} // namespace gem5