gem5/src/mem/addr_mapper.cc
Andreas Hansson d4273cc9a6 mem: Set the cache line size on a system level
This patch removes the notion of a peer block size and instead sets
the cache line size on the system level.

Previously the size was set per cache, and communicated through the
interconnect. There were plenty checks to ensure that everyone had the
same size specified, and these checks are now removed. Another benefit
that is not yet harnessed is that the cache line size is now known at
construction time, rather than after the port binding. Hence, the
block size can be locally stored and does not have to be queried every
time it is used.

A follow-on patch updates the configuration scripts accordingly.
2013-07-18 08:31:16 -04:00

253 lines
7 KiB
C++

/*
* 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.
*
* Authors: Andreas Hansson
*/
#include "mem/addr_mapper.hh"
AddrMapper::AddrMapper(const AddrMapperParams* p)
: MemObject(p),
masterPort(name() + "-master", *this),
slavePort(name() + "-slave", *this)
{
}
void
AddrMapper::init()
{
if (!slavePort.isConnected() || !masterPort.isConnected())
fatal("Address mapper is not connected on both sides.\n");
}
BaseMasterPort&
AddrMapper::getMasterPort(const std::string& if_name, PortID idx)
{
if (if_name == "master") {
return masterPort;
} else {
return MemObject::getMasterPort(if_name, idx);
}
}
BaseSlavePort&
AddrMapper::getSlavePort(const std::string& if_name, PortID idx)
{
if (if_name == "slave") {
return slavePort;
} else {
return MemObject::getSlavePort(if_name, idx);
}
}
void
AddrMapper::recvFunctional(PacketPtr pkt)
{
Addr orig_addr = pkt->getAddr();
pkt->setAddr(remapAddr(orig_addr));
masterPort.sendFunctional(pkt);
pkt->setAddr(orig_addr);
}
void
AddrMapper::recvFunctionalSnoop(PacketPtr pkt)
{
Addr orig_addr = pkt->getAddr();
pkt->setAddr(remapAddr(orig_addr));
slavePort.sendFunctionalSnoop(pkt);
pkt->setAddr(orig_addr);
}
Tick
AddrMapper::recvAtomic(PacketPtr pkt)
{
Addr orig_addr = pkt->getAddr();
pkt->setAddr(remapAddr(orig_addr));
Tick ret_tick = masterPort.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 = slavePort.sendAtomicSnoop(pkt);
pkt->setAddr(orig_addr);
return ret_tick;
}
bool
AddrMapper::recvTimingReq(PacketPtr pkt)
{
Addr orig_addr = pkt->getAddr();
bool needsResponse = pkt->needsResponse();
bool memInhibitAsserted = pkt->memInhibitAsserted();
if (needsResponse && !memInhibitAsserted) {
pkt->pushSenderState(new AddrMapperSenderState(orig_addr));
}
pkt->setAddr(remapAddr(orig_addr));
// Attempt to send the packet (always succeeds for inhibited
// packets)
bool successful = masterPort.sendTimingReq(pkt);
// If not successful, restore the sender state
if (!successful && 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 = slavePort.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)
{
slavePort.sendTimingSnoopReq(pkt);
}
bool
AddrMapper::recvTimingSnoopResp(PacketPtr pkt)
{
return masterPort.sendTimingSnoopResp(pkt);
}
bool
AddrMapper::isSnooping() const
{
if (slavePort.isSnooping())
fatal("AddrMapper doesn't support remapping of snooping requests\n");
return false;
}
void
AddrMapper::recvRetryMaster()
{
slavePort.sendRetry();
}
void
AddrMapper::recvRetrySlave()
{
masterPort.sendRetry();
}
void
AddrMapper::recvRangeChange()
{
slavePort.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");
}
}
RangeAddrMapper*
RangeAddrMapperParams::create()
{
return new RangeAddrMapper(this);
}
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;
}