sector_blk.cc

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#include "mem/cache/tags/sector_blk.hh"
 
#include <cassert>
 
#include "base/cprintf.hh"
#include "base/logging.hh"
 
namespace gem5
{
 
void
SectorSubBlk::setSectorBlock(SectorBlk* sector_blk)
{
    assert(sector_blk != nullptr);
    _sectorBlk = sector_blk;
}
 
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
{
    // If the sub-block is valid its tag must match its sector's
    const Addr tag = _sectorBlk->getTag();
    assert(!isValid() || (CacheBlk::getTag() == tag));
    return tag;
}
 
void
SectorSubBlk::setValid()
{
    CacheBlk::setValid();
    _sectorBlk->validateSubBlk();
}
 
void
SectorSubBlk::insert(const Addr tag, const bool is_secure)
{
    // Make sure it is not overwriting another sector
    panic_if(_sectorBlk && _sectorBlk->isValid() &&
        !_sectorBlk->matchTag(tag, is_secure), "Overwriting valid sector!");
 
    // If the sector is not valid, insert the new tag. The sector block
    // handles its own tag's invalidation, so do not attempt to insert MaxAddr.
    if ((_sectorBlk && !_sectorBlk->isValid()) && (tag != MaxAddr)) {
        _sectorBlk->insert(tag, is_secure);
    }
    CacheBlk::insert(tag, is_secure);
}
 
void
SectorSubBlk::invalidate()
{
    CacheBlk::invalidate();
    _sectorBlk->invalidateSubBlk();
}
 
std::string
SectorSubBlk::print() const
{
    return csprintf("%s sector offset: %#x", CacheBlk::print(),
                    getSectorOffset());
}
 
SectorBlk::SectorBlk()
    : TaggedEntry(), _validCounter(0)
{
}
 
bool
SectorBlk::isValid() const
{
    // If any of the blocks in the sector is valid, so is the sector
    return _validCounter > 0;
}
 
uint8_t
SectorBlk::getNumValid() const
{
    return _validCounter;
}
 
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) {
        invalidate();
    }
}
 
void
SectorBlk::setPosition(const uint32_t set, const uint32_t way)
{
    ReplaceableEntry::setPosition(set, way);
    for (auto& blk : blks) {
        blk->setPosition(set, way);
    }
}
 
std::string
SectorBlk::print() const
{
    std::string sub_blk_print;
    for (const auto& sub_blk : blks) {
        if (sub_blk->isValid()) {
            sub_blk_print += "\t[" + sub_blk->print() + "]\n";
        }
    }
    return csprintf("%s valid sub-blks (%d):\n%s",
        TaggedEntry::print(), getNumValid(), sub_blk_print);
}
 
} // namespace gem5