MemoryProxy.cc

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
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/**
 * @file MemoryProxy.cc
 *
 * Implementation of MemoryProxy class.
 *
 * @author Veli-Pekka Jääskeläinen 2007 (vjaaskel-no.spam-cs.tut.fi)
 * @note rating: red
 */
 
#include "MemoryProxy.hh"
#include "SimulatorToolbox.hh"
#include "SimulationEventHandler.hh"
#include "SimulatorFrontend.hh"
 
 
/**
 * The Constructor.
 *
 * MemoryProxy takes ownership of the wrapped Memory instance.
 *
 * @param memory Tracked memory.
 */
MemoryProxy::MemoryProxy(SimulatorFrontend& frontend, Memory* memory) :
    Memory(memory->start(), memory->end(), memory->MAUSize(),
           memory->isLittleEndian()),
    frontend_(frontend), memory_(memory) {
}
 
 
/**
 * The Destructor.
 *
 * Deletes the tracked memory instance.
 */
MemoryProxy::~MemoryProxy() {
    delete memory_;
}
 
/**
 * Tracks read calls.
 *
 * Passes the call to the wrapped memory.
 */
Memory::MAU
MemoryProxy::read(ULongWord address) {
 
    frontend_.eventHandler().handleEvent(
        SimulationEventHandler::SE_MEMORY_ACCESS);
 
    newReads_.push_back(std::make_pair(address, 1));
    return memory_->read(address);
}
 
/**
 * Tracks write calls.
 *
 * Passes the call to the wrapped memory.
 */
void
MemoryProxy::write(
    ULongWord address, MAU data) {
 
    frontend_.eventHandler().handleEvent(
        SimulationEventHandler::SE_MEMORY_ACCESS);
 
    newWrites_.push_back(std::make_pair(address, 1));
    memory_->write(address, data);
}
 
/**
 * Resets the memory access information for the last cycle when
 * wrapped memory clock is advanced.
 */
void
MemoryProxy::advanceClock() {
    writes_ = newWrites_;
    reads_ = newReads_;
    newWrites_.clear();
    newReads_.clear();
    memory_->advanceClock();
}
 
/**
 * Resets all memory access information when the wrapped memory is reset.
 */
void
MemoryProxy::reset() {
    reads_.clear();
    writes_.clear();
    newReads_.clear();
    newWrites_.clear();
    memory_->reset();
}
 
/**
 * Returns number of read accesses on the last cycle.
 */
unsigned int
MemoryProxy::readAccessCount() const {
    return reads_.size();
}
 
/**
 * Returns information of the given memory read access.
 *
 * @param idx Index of the read access.
 * @exception OutOfRange If the index is invalid.
 */
MemoryProxy::MemoryAccess
MemoryProxy::readAccess(unsigned idx) const {
 
    if (idx > reads_.size()) {
        throw OutOfRange(__FILE__, __LINE__, __func__);
    }
    return reads_[idx];
}
 
/**
 * Returns number of write accesses on the last cycle.
 */
unsigned int
MemoryProxy::writeAccessCount() const {
    return writes_.size();
}
 
 
/**
 * Returns information of the given memory write access.
 *
 * @param idx Index of the write access.
 * @exception OutOfRange If the index is invalid.
 */
MemoryProxy::MemoryAccess
MemoryProxy::writeAccess(unsigned idx) const {
 
    if (idx > writes_.size()) {
        throw OutOfRange(__FILE__, __LINE__, __func__);
    }
    return writes_[idx];
}