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/*
* Copyright (c) 2006 The Regents of The University of Michigan
* All rights reserved.
*
* 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.
*/
/**
* @file
* Definition of the Packet Class, a packet is a transaction occuring
* between a single level of the memory heirarchy (ie L1->L2).
*/
#include "base/misc.hh"
#include "mem/packet.hh"
static const std::string ReadReqString("ReadReq");
static const std::string WriteReqString("WriteReq");
static const std::string WriteReqNoAckString("WriteReqNoAck");
static const std::string ReadRespString("ReadResp");
static const std::string WriteRespString("WriteResp");
static const std::string OtherCmdString("<other>");
const std::string &
Packet::cmdString() const
{
switch (cmd) {
case ReadReq: return ReadReqString;
case WriteReq: return WriteReqString;
case WriteReqNoAck: return WriteReqNoAckString;
case ReadResp: return ReadRespString;
case WriteResp: return WriteRespString;
default: return OtherCmdString;
}
}
/** delete the data pointed to in the data pointer. Ok to call to matter how
* data was allocted. */
void
Packet::deleteData()
{
assert(staticData || dynamicData);
if (staticData)
return;
if (arrayData)
delete [] data;
else
delete data;
}
/** If there isn't data in the packet, allocate some. */
void
Packet::allocate()
{
if (data)
return;
assert(!staticData);
dynamicData = true;
arrayData = true;
data = new uint8_t[getSize()];
}
/** Do the packet modify the same addresses. */
bool
Packet::intersect(Packet *p)
{
Addr s1 = getAddr();
Addr e1 = getAddr() + getSize();
Addr s2 = p->getAddr();
Addr e2 = p->getAddr() + p->getSize();
if (s1 >= s2 && s1 < e2)
return true;
if (e1 >= s2 && e1 < e2)
return true;
return false;
}
/** Minimally reset a packet so something like simple cpu can reuse it. */
void
Packet::reset()
{
result = Unknown;
if (dynamicData) {
deleteData();
dynamicData = false;
arrayData = false;
time = curTick;
}
}
bool
fixPacket(Packet *func, Packet *timing)
{
panic("Need to implement!");
}
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