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// SPDX-License-Identifier: GPL-2.0+
/*******************************************************************************
* QtMips - MIPS 32-bit Architecture Subset Simulator
*
* Implemented to support following courses:
*
* B35APO - Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b35apo
*
* B4M35PAP - Advanced Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
*
* Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
* Copyright (c) 2019 Pavel Pisa <pisa@cmp.felk.cvut.cz>
*
* Faculty of Electrical Engineering (http://www.fel.cvut.cz)
* Czech Technical University (http://www.cvut.cz/)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
******************************************************************************/
#ifndef MEMORYMODEL_H
#define MEMORYMODEL_H
#include <QAbstractTableModel>
#include <QFont>
#include "qtmipsmachine.h"
class MemoryModel : public QAbstractTableModel
{
Q_OBJECT
using Super = QAbstractTableModel;
public:
enum MemoryCellSize {
CELLSIZE_BYTE,
CELLSIZE_HWORD,
CELLSIZE_WORD,
};
MemoryModel(QObject *parent);
int rowCount(const QModelIndex &parent = QModelIndex()) const override ;
int columnCount(const QModelIndex &parent = QModelIndex()) const override;
QVariant headerData(int section, Qt::Orientation orientation, int role) const override;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
Qt::ItemFlags flags(const QModelIndex &index) const;
bool setData(const QModelIndex & index, const QVariant & value, int role);
bool adjustRowAndOffset(int &row, int optimal_row, std::uint32_t address);
void update_all();
void setCellsPerRow(unsigned int cells);
inline unsigned int cellsPerRow() {
return cells_per_row;
}
inline const QFont *getFont() const {
return &data_font;
}
inline std::uint32_t getIndex0Offset() const {
return index0_offset;
}
inline unsigned int cellSizeBytes() const {
switch (cell_size) {
case CELLSIZE_BYTE:
return 1;
case CELLSIZE_HWORD:
return 2;
case CELLSIZE_WORD:
return 4;
}
return 0;
}
inline bool get_row_address(std::uint32_t &address, int row) const {
address = index0_offset + (row * cells_per_row * cellSizeBytes());
return address >= index0_offset;
}
inline bool get_row_for_address(int &row, std::uint32_t address) const {
if (address < index0_offset) {
row = -1;
return false;
}
row = (address - index0_offset) / (cells_per_row * cellSizeBytes());
if ((address - index0_offset > 0x80000000) || row > rowCount()) {
row = rowCount();
return false;
}
return true;
}
public slots:
void setup(machine::QtMipsMachine *machine);
void set_cell_size(int index);
void check_for_updates();
void cached_access(int cached);
signals:
void cell_size_changed();
private:
enum MemoryCellSize cell_size;
unsigned int cells_per_row;
std::uint32_t index0_offset;
QFont data_font;
machine::QtMipsMachine *machine;
std::uint32_t memory_change_counter;
std::uint32_t cache_data_change_counter;
int access_through_cache;
};
#endif // MEMORYMODEL_H
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