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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.
*
******************************************************************************/
#include <QBrush>
#include "memorymodel.h"
MemoryModel::MemoryModel(QObject *parent)
: Super(parent), data_font("Monospace") {
cell_size = CELLSIZE_WORD;
cells_per_row = 1;
index0_offset = 0;
data_font.setStyleHint(QFont::TypeWriter);
machine = nullptr;
memory_change_counter = 0;
cache_data_change_counter = 0;
access_through_cache = 0;
}
int MemoryModel::rowCount(const QModelIndex & /*parent*/) const {
// std::uint64_t rows = (0x2000 + cells_per_row - 1) / cells_per_row;
return 750;
}
int MemoryModel::columnCount(const QModelIndex & /*parent*/) const {
return cells_per_row + 1;
}
QVariant MemoryModel::headerData(int section, Qt::Orientation orientation, int role) const
{
if(orientation == Qt::Horizontal) {
if(role == Qt::DisplayRole) {
if(section == 0) {
return tr("Address");
}
else {
std::uint32_t addr = (section - 1) * cellSizeBytes();
QString ret = "+" + QString::number(addr, 10);
return ret;
}
}
}
return Super::headerData(section, orientation, role);
}
QVariant MemoryModel::data(const QModelIndex &index, int role) const {
if (role == Qt::DisplayRole)
{
QString s, t;
std::uint32_t address;
std::uint32_t data;
const machine::MemoryAccess *mem;
if (!get_row_address(address, index.row()))
return QString("");
if (index.column() == 0) {
t = QString::number(address, 16);
s.fill('0', 8 - t.count());
return "0x" + s + t.toUpper();
}
if (machine == nullptr)
return QString("");
mem = machine->memory();
if (mem == nullptr)
return QString("");
if ((access_through_cache > 0) && (machine->cache_data() != nullptr))
mem = machine->cache_data();
address += cellSizeBytes() * (index.column() - 1);
if (address < index0_offset)
return QString("");
switch (cell_size) {
case CELLSIZE_BYTE:
data = mem->read_byte(address, true);
break;
case CELLSIZE_HWORD:
data = mem->read_hword(address, true);
break;
default:
case CELLSIZE_WORD:
data = mem->read_word(address, true);
break;
}
t = QString::number(data, 16);
s.fill('0', cellSizeBytes() * 2 - t.count());
t = s + t.toUpper();
#if 0
machine::LocationStatus loc_stat = machine::LOCSTAT_NONE;
if (machine->cache_data() != nullptr) {
loc_stat = machine->cache_data()->location_status(address);
if (loc_stat & machine::LOCSTAT_DIRTY)
t += " D";
else if (loc_stat & machine::LOCSTAT_CACHED)
t += " C";
}
#endif
return t;
}
if (role == Qt::BackgroundRole) {
std::uint32_t address;
if (!get_row_address(address, index.row()) ||
machine == nullptr || index.column() == 0)
return QVariant();
address += cellSizeBytes() * (index.column() - 1);
if (machine->cache_data() != nullptr) {
machine::LocationStatus loc_stat;
loc_stat = machine->cache_data()->location_status(address);
if (loc_stat & machine::LOCSTAT_DIRTY) {
QBrush bgd(Qt::yellow);
return bgd;
} else if (loc_stat & machine::LOCSTAT_CACHED) {
QBrush bgd(Qt::lightGray);
return bgd;
}
}
return QVariant();
}
if (role==Qt::FontRole)
return data_font;
return QVariant();
}
void MemoryModel::setup(machine::QtMipsMachine *machine) {
this->machine = machine;
if (machine != nullptr)
connect(machine, SIGNAL(post_tick()), this, SLOT(check_for_updates()));
emit update_all();
}
void MemoryModel::setCellsPerRow(unsigned int cells) {
beginResetModel();
cells_per_row = cells;
endResetModel();
}
void MemoryModel::set_cell_size(int index) {
beginResetModel();
cell_size = (enum MemoryCellSize)index;
index0_offset -= index0_offset % cellSizeBytes();
endResetModel();
emit cell_size_changed();
}
void MemoryModel::update_all() {
if (machine != nullptr && machine->memory() != nullptr) {
memory_change_counter = machine->memory()->get_change_counter();
if (machine->cache_data() != nullptr)
cache_data_change_counter = machine->cache_data()->get_change_counter();
}
emit dataChanged(index(0, 0), index(rowCount() - 1, columnCount() - 1));
}
void MemoryModel::check_for_updates() {
bool need_update = false;
if (machine == nullptr)
return;
if (machine->memory() == nullptr)
return;
if (memory_change_counter != machine->memory()->get_change_counter())
need_update = true;
if (machine->cache_data() != nullptr) {
if (cache_data_change_counter != machine->cache_data()->get_change_counter())
need_update = true;
}
if (!need_update)
return;
update_all();
}
bool MemoryModel::adjustRowAndOffset(int &row, int optimal_row, std::uint32_t address) {
if (optimal_row < rowCount() / 8)
optimal_row = rowCount() / 8;
if (optimal_row >= rowCount() - rowCount() / 8)
optimal_row = rowCount() - rowCount() / 8;
row = rowCount() / 2;
address -= address % cellSizeBytes();
std::uint32_t row_bytes = cells_per_row * cellSizeBytes();
std::uint32_t diff = row * row_bytes;
if (diff > address) {
row = address / row_bytes;
if (row == 0) {
index0_offset = 0;
} else {
index0_offset = address - row * row_bytes;
}
} else {
index0_offset = address - diff;
}
return get_row_for_address(row, address);
}
void MemoryModel::cached_access(int cached) {
access_through_cache = cached;
update_all();
}
Qt::ItemFlags MemoryModel::flags(const QModelIndex &index) const {
if (index.column() == 0)
return QAbstractTableModel::flags(index);
else
return QAbstractTableModel::flags(index) | Qt::ItemIsEditable;
}
bool MemoryModel::setData(const QModelIndex & index, const QVariant & value, int role) {
if (role == Qt::EditRole)
{
bool ok;
std::uint32_t address;
std::uint32_t data = value.toString().toULong(&ok, 16);
if (!ok)
return false;
machine::MemoryAccess *mem;
if (!get_row_address(address, index.row()))
return false;
if (index.column() == 0 || machine == nullptr)
return false;
mem = machine->memory_rw();
if (mem == nullptr)
return false;
if ((access_through_cache > 0) && (machine->cache_data_rw() != nullptr))
mem = machine->cache_data_rw();
address += cellSizeBytes() * (index.column() - 1);
switch (cell_size) {
case CELLSIZE_BYTE:
mem->write_byte(address, data);
break;
case CELLSIZE_HWORD:
mem->write_hword(address, data);
break;
default:
case CELLSIZE_WORD:
mem->write_word(address, data);
break;
}
}
return true;
}
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