AbstractCacheEntry.cc

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/*
 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
 * 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,
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 */

#include "mem/ruby/slicc_interface/AbstractCacheEntry.hh"

#include "base/trace.hh"
#include "debug/RubyCache.hh"

AbstractCacheEntry::AbstractCacheEntry() : ReplaceableEntry()
{
    m_Permission = AccessPermission_NotPresent;
    m_Address = 0;
    m_locked = -1;
    m_last_touch_tick = 0;
}

AbstractCacheEntry::~AbstractCacheEntry()
{
}

// Get cache permission
AccessPermission
AbstractCacheEntry::getPermission() const
{
    return m_Permission;
}

void
AbstractCacheEntry::changePermission(AccessPermission new_perm)
{
    m_Permission = new_perm;
    if ((new_perm == AccessPermission_Invalid) ||
        (new_perm == AccessPermission_NotPresent)) {
        m_locked = -1;
    }
}

void
AbstractCacheEntry::setLocked(int context)
{
    DPRINTF(RubyCache, "Setting Lock for addr: %#x to %d\n", m_Address, context);
    m_locked = context;
}

void
AbstractCacheEntry::clearLocked()
{
    DPRINTF(RubyCache, "Clear Lock for addr: %#x\n", m_Address);
    m_locked = -1;
}

bool
AbstractCacheEntry::isLocked(int context) const
{
    DPRINTF(RubyCache, "Testing Lock for addr: %#llx cur %d con %d\n",
            m_Address, m_locked, context);
    return m_locked == context;
}