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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 "tst_machine.h"
#include "memory.h"
using namespace machine;
void MachineTests::memory_data() {
QTest::addColumn<std::uint32_t>("address");
QTest::newRow("memory begin") << (std::uint32_t)0x00;
QTest::newRow("memory end") << (std::uint32_t)0xFFFFFFFC;
QTest::newRow("memory midle start") << (std::uint32_t)0xFFFF00;
QTest::newRow("memory midle end") << (std::uint32_t)0xFFFFFF;
}
void MachineTests::memory() {
Memory m;
QFETCH(std::uint32_t, address);
// Uninitialize memory should read as zero
QCOMPARE(m.read_byte(address), (std::uint8_t)0);
QCOMPARE(m.read_hword(address), (std::uint16_t)0);
QCOMPARE(m.read_word(address), (std::uint32_t)0);
// Just a byte
m.write_byte(address, 0x42);
QCOMPARE(m.read_byte(address), (std::uint8_t)0x42);
// Half word
m.write_hword(address, 0x4243);
QCOMPARE(m.read_hword(address), (std::uint16_t)0x4243);
// Word
m.write_word(address, 0x42434445);
QCOMPARE(m.read_word(address), (std::uint32_t)0x42434445);
}
void MachineTests::memory_section_data() {
QTest::addColumn<std::uint32_t>("address");
QTest::newRow("memory begin") << (std::uint32_t)0x00;
QTest::newRow("memory end") << (std::uint32_t)0xFFFFFFFF;
QTest::newRow("memory midle start") << (std::uint32_t)0xFFFF00;
QTest::newRow("memory midle end") << (std::uint32_t)0xFFFFFF;
}
void MachineTests::memory_section() {
Memory m;
QFETCH(std::uint32_t, address);
// First section shouldn't exists QCOMPARE(m.get_section(address, false), (MemorySection*)nullptr);
// Create section
MemorySection *s = m.get_section(address, true);
QVERIFY(s != nullptr);
// Write some data to memory
m.write_byte(address, 0x42);
// Read it trough section (mask bits outside of the memory section)
QCOMPARE(s->read_byte(address & 0xFF), (std::uint8_t)0x42);
// Write some other data trough section
s->write_byte(address & 0xFF, 0x66);
// Read trough memory
QCOMPARE(m.read_byte(address), (std::uint8_t)0x66);
}
void MachineTests::memory_endian() {
Memory m;
// Memory should be big endian so write bytes from most significant byte
m.write_byte(0x00, 0x12);
m.write_byte(0x01, 0x34);
m.write_byte(0x02, 0x56);
m.write_byte(0x03, 0x78);
QCOMPARE(m.read_hword(0x00), (std::uint16_t)0x1234);
QCOMPARE(m.read_word(0x00), (std::uint32_t)0x12345678);
m.write_hword(0x80, 0x1234);
QCOMPARE(m.read_byte(0x80), (std::uint8_t)0x12);
QCOMPARE(m.read_byte(0x81), (std::uint8_t)0x34);
m.write_word(0xF0, 0x12345678);
QCOMPARE(m.read_byte(0xF0), (std::uint8_t)0x12);
QCOMPARE(m.read_byte(0xF1), (std::uint8_t)0x34);
QCOMPARE(m.read_byte(0xF2), (std::uint8_t)0x56);
QCOMPARE(m.read_byte(0xF3), (std::uint8_t)0x78);
}
void MachineTests::memory_compare() {
Memory m1, m2;
QCOMPARE(m1, m2);
m1.write_byte(0x20,0x0);
QVERIFY(m1 != m2); // This should not be equal as this identifies also memory write (difference between no write and zero write)
m1.write_byte(0x20,0x24);
QVERIFY(m1 != m2);
m2.write_byte(0x20,0x23);
QVERIFY(m1 != m2);
m2.write_byte(0x20,0x24);
QCOMPARE(m1, m2);
// Do the same with some other section
m1.write_byte(0xFFFF20, 0x24);
QVERIFY(m1 != m2);
m2.write_byte(0xFFFF20, 0x24);
QCOMPARE(m1, m2);
// And also check memory copy
Memory m3(m1);
QCOMPARE(m1, m3);
m3.write_byte(0x18, 0x22);
QVERIFY(m1 != m3);
}
void MachineTests::memory_write_ctl_data() {
QTest::addColumn<AccessControl>("ctl");
QTest::addColumn<Memory>("result");
Memory mem;
QTest::newRow("none") << AC_NONE \
<< mem;
mem.write_byte(0x20, 0x26);
QTest::newRow("byte") << AC_BYTE \
<< mem;
QTest::newRow("byte-unsigned") << AC_BYTE_UNSIGNED \
<< mem;
mem.write_hword(0x20, 0x2526);
QTest::newRow("halfword") << AC_HALFWORD \
<< mem;
QTest::newRow("haldword-unsigned") << AC_HALFWORD_UNSIGNED \
<< mem;
mem.write_word(0x20, 0x23242526);
QTest::newRow("word") << AC_WORD \
<< mem;
}
void MachineTests::memory_write_ctl() {
QFETCH(AccessControl, ctl);
QFETCH(Memory, result);
Memory mem;
mem.write_ctl(ctl, 0x20, 0x23242526);
QCOMPARE(mem, result);
}
void MachineTests::memory_read_ctl_data() {
QTest::addColumn<AccessControl>("ctl");
QTest::addColumn<std::uint32_t>("result");
QTest::newRow("none") << AC_NONE \
<< (std::uint32_t)0;
QTest::newRow("byte") << AC_BYTE \
<< (std::uint32_t)0xFFFFFFA3;
QTest::newRow("halfword") << AC_HALFWORD \
<< (std::uint32_t)0xFFFFA324;
QTest::newRow("word") << AC_WORD \
<< (std::uint32_t)0xA3242526;
QTest::newRow("byte-unsigned") << AC_BYTE_UNSIGNED \
<< (std::uint32_t)0xA3;
QTest::newRow("halfword-unsigned") << AC_HALFWORD_UNSIGNED \
<< (std::uint32_t)0xA324;
}
void MachineTests::memory_read_ctl() {
QFETCH(AccessControl, ctl);
QFETCH(std::uint32_t, result);
Memory mem;
mem.write_word(0x20, 0xA3242526);
QCOMPARE(mem.read_ctl(ctl, 0x20), result);
}
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