/*
 * Copyright (c) 2012-2013, 2015-2016 ARM Limited
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 *
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 * 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
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 * modified or unmodified, in source code or in binary form.
 *
 * Copyright (c) 2003-2005 The Regents of The University of Michigan
 * All rights reserved.
 *
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 * 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,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Erik Hallnor
 *          Andreas Sandberg
 *          Andreas Hansson
 */

/** @file
 * Definition of WriteQueue class functions.
 */

#include "mem/cache/write_queue.hh"

using namespace std;

WriteQueue::WriteQueue(const std::string &_label,
                       int num_entries, int reserve)
    : Queue<WriteQueueEntry>(_label, num_entries, reserve)
{}

WriteQueueEntry *
WriteQueue::allocate(Addr blk_addr, unsigned blk_size, PacketPtr pkt,
                    Tick when_ready, Counter order)
{
    assert(!freeList.empty());
    WriteQueueEntry *entry = freeList.front();
    assert(entry->getNumTargets() == 0);
    freeList.pop_front();

    entry->allocate(blk_addr, blk_size, pkt, when_ready, order);
    entry->allocIter = allocatedList.insert(allocatedList.end(), entry);
    entry->readyIter = addToReadyList(entry);

    allocated += 1;
    return entry;
}

void
WriteQueue::markInService(WriteQueueEntry *entry)
{
    // for a normal eviction, such as a writeback or a clean evict,
    // there is no more to do as we are done from the perspective of
    // this cache, and for uncacheable write we do not need the entry
    // as part of the response handling
    entry->popTarget();
    deallocate(entry);
}