DataBlock.cc

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/*
 * Copyright (c) 2021 ARM Limited
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 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * 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) 1999-2008 Mark D. Hill and David A. Wood
 * All rights reserved.
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#include "mem/ruby/common/DataBlock.hh"
 
#include "mem/ruby/common/WriteMask.hh"
#include "mem/ruby/system/RubySystem.hh"
 
DataBlock::DataBlock(const DataBlock &cp)
{
    m_data = new uint8_t[RubySystem::getBlockSizeBytes()];
    memcpy(m_data, cp.m_data, RubySystem::getBlockSizeBytes());
    m_alloc = true;
}
 
void
DataBlock::alloc()
{
    m_data = new uint8_t[RubySystem::getBlockSizeBytes()];
    m_alloc = true;
    clear();
}
 
void
DataBlock::clear()
{
    memset(m_data, 0, RubySystem::getBlockSizeBytes());
}
 
bool
DataBlock::equal(const DataBlock& obj) const
{
    return !memcmp(m_data, obj.m_data, RubySystem::getBlockSizeBytes());
}
 
void
DataBlock::copyPartial(const DataBlock &dblk, const WriteMask &mask)
{
    for (int i = 0; i < RubySystem::getBlockSizeBytes(); i++) {
        if (mask.getMask(i, 1)) {
            m_data[i] = dblk.m_data[i];
        }
    }
}
 
void
DataBlock::atomicPartial(const DataBlock &dblk, const WriteMask &mask)
{
    for (int i = 0; i < RubySystem::getBlockSizeBytes(); i++) {
        m_data[i] = dblk.m_data[i];
    }
    mask.performAtomic(m_data);
}
 
void
DataBlock::print(std::ostream& out) const
{
    int size = RubySystem::getBlockSizeBytes();
    out << "[ ";
    for (int i = 0; i < size; i++) {
        out << std::setw(2) << std::setfill('0') << std::hex
            << "0x" << (int)m_data[i] << " " << std::setfill(' ');
    }
    out << std::dec << "]" << std::flush;
}
 
const uint8_t*
DataBlock::getData(int offset, int len) const
{
    assert(offset + len <= RubySystem::getBlockSizeBytes());
    return &m_data[offset];
}
 
uint8_t*
DataBlock::getDataMod(int offset)
{
    return &m_data[offset];
}
 
void
DataBlock::setData(const uint8_t *data, int offset, int len)
{
    memcpy(&m_data[offset], data, len);
}
 
void
DataBlock::setData(PacketPtr pkt)
{
    int offset = getOffset(pkt->getAddr());
    assert(offset + pkt->getSize() <= RubySystem::getBlockSizeBytes());
    pkt->writeData(&m_data[offset]);
}
 
DataBlock &
DataBlock::operator=(const DataBlock & obj)
{
    memcpy(m_data, obj.m_data, RubySystem::getBlockSizeBytes());
    return *this;
}