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/**
* Copyright (c) 2018 Inria
* 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.
*
* Authors: Daniel Carvalho
*/
/** @file
* Implementation of a simple sector block class. Each sector consists of a
* sequence of cache blocks that may or may not be present in the cache.
*/
#include "mem/cache/tags/sector_blk.hh"
#include <cassert>
#include "base/cprintf.hh"
#include "base/logging.hh"
void
SectorSubBlk::setSectorBlock(SectorBlk* sector_blk)
{
assert(sector_blk != nullptr);
_sectorBlk = sector_blk;
}
const SectorBlk*
SectorSubBlk::getSectorBlock() const
{
return _sectorBlk;
}
void
SectorSubBlk::setSectorOffset(const int sector_offset)
{
_sectorOffset = sector_offset;
}
int
SectorSubBlk::getSectorOffset() const
{
return _sectorOffset;
}
Addr
SectorSubBlk::getTag() const
{
return _sectorBlk->getTag();
}
void
SectorSubBlk::setValid()
{
CacheBlk::setValid();
_sectorBlk->validateSubBlk();
}
void
SectorSubBlk::setSecure()
{
CacheBlk::setSecure();
_sectorBlk->setSecure();
}
void
SectorSubBlk::invalidate()
{
CacheBlk::invalidate();
_sectorBlk->invalidateSubBlk();
}
void
SectorSubBlk::insert(const Addr tag, const bool is_secure,
const int src_master_ID, const uint32_t task_ID)
{
// Make sure it is not overwriting another sector
panic_if((_sectorBlk && _sectorBlk->isValid()) &&
((_sectorBlk->getTag() != tag) ||
(_sectorBlk->isSecure() != is_secure)),
"Overwriting valid sector!");
CacheBlk::insert(tag, is_secure, src_master_ID, task_ID);
// Set sector tag
_sectorBlk->setTag(tag);
}
std::string
SectorSubBlk::print() const
{
return csprintf("%s sector offset: %#x", CacheBlk::print(),
getSectorOffset());
}
SectorBlk::SectorBlk()
: ReplaceableEntry(), _tag(MaxAddr), _validCounter(0), _secureBit(false)
{
}
bool
SectorBlk::isValid() const
{
// If any of the blocks in the sector is valid, so is the sector
return _validCounter > 0;
}
bool
SectorBlk::isSecure() const
{
// If any of the valid blocks in the sector is secure, so is the sector
return _secureBit;
}
void
SectorBlk::setTag(const Addr tag)
{
_tag = tag;
}
Addr
SectorBlk::getTag() const
{
return _tag;
}
void
SectorBlk::validateSubBlk()
{
_validCounter++;
}
void
SectorBlk::invalidateSubBlk()
{
// If all sub-blocks have been invalidated, the sector becomes invalid,
// so clear secure bit
if (--_validCounter == 0) {
_secureBit = false;
}
}
void
SectorBlk::setSecure()
{
_secureBit = true;
}
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