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/*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Copyright (C) 2021-2021 The DOSBox Staging Team
*
* 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 "../src/hardware/iohandler_containers.cpp"
#include <cassert>
#include <cstdint>
#include <gtest/gtest.h>
// Constants for all tests
// ~~~~~~~~~~~~~~~~~~~~~~~
constexpr uint16_t value_step_size = 4;
constexpr uint16_t port_step_size = 256;
constexpr uint16_t byte_port_start = 4;
constexpr uint16_t word_port_start = byte_port_start * 2;
constexpr uint16_t dword_port_start = word_port_start * 2;
// Byte IO handler functions (Bitu and sized)
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
static uint8_t byte_val_new = 0;
static uint8_t read_byte_new(io_port_t, io_width_t)
{
return byte_val_new;
}
static void write_byte_new(io_port_t, uint8_t val, io_width_t)
{
byte_val_new = val;
}
// Word IO handler functions (Bitu and sized)
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
static uint16_t word_val_new = 0;
static uint16_t read_word_new(io_port_t, io_width_t)
{
return word_val_new;
}
static void write_word_new(io_port_t, uint16_t val, io_width_t)
{
word_val_new = val;
}
// Dword IO handler functions (Bitu and sized)
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
static uint32_t dword_val_new = 0;
static uint32_t read_dword_new(io_port_t, io_width_t)
{
return dword_val_new;
}
static void write_dword_new(io_port_t, uint32_t val, io_width_t)
{
dword_val_new = val;
}
namespace {
TEST(iohandler_containers, valid_bytes)
{
for (uint32_t p = byte_port_start; p <= UINT16_MAX; p += port_step_size) {
const auto port = static_cast<uint16_t>(p);
IO_RegisterWriteHandler(port, write_byte_new, io_width_t::byte);
IO_RegisterReadHandler(port, read_byte_new, io_width_t::byte);
for (uint16_t v = 0; v <= UINT8_MAX; v += value_step_size) {
const auto value = static_cast<uint8_t>(v);
write_byte_to_port(port, value);
EXPECT_EQ(v, read_byte_from_port(port));
}
}
}
TEST(iohandler_containers, valid_words)
{
for (uint32_t p = word_port_start; p <= UINT16_MAX; p += port_step_size) {
const auto port = static_cast<uint16_t>(p);
IO_RegisterWriteHandler(port, write_word_new, io_width_t::word);
IO_RegisterReadHandler(port, read_word_new, io_width_t::word);
for (uint32_t v = 0; v <= UINT16_MAX; v += (value_step_size << 8)) {
const auto value = static_cast<uint16_t>(v);
write_word_to_port(port, value);
EXPECT_EQ(v, read_word_from_port(port));
}
}
}
TEST(iohandler_containers, valid_dwords)
{
for (uint32_t p = dword_port_start; p <= UINT16_MAX; p += port_step_size) {
const auto port = static_cast<uint16_t>(p);
IO_RegisterWriteHandler(port, write_dword_new, io_width_t::dword);
IO_RegisterReadHandler(port, read_dword_new, io_width_t::dword);
for (uint64_t v = 0; v <= UINT32_MAX; v += (value_step_size << 20)) {
const auto value = static_cast<uint32_t>(v);
write_dword_to_port(port, value);
EXPECT_EQ(v, read_dword_from_port(port));
}
}
}
TEST(iohandler_containers, empty_reads)
{
constexpr uint16_t unregistered = 0;
EXPECT_EQ(static_cast<uint16_t>(-1),
read_word_from_port(unregistered));
EXPECT_EQ(static_cast<uint32_t>(-1),
read_dword_from_port(unregistered));
}
TEST(iohandler_containers, empty_writes)
{
constexpr uint16_t unregistered = 0;
write_byte_to_port(unregistered, 0);
}
TEST(iohandler_containers, adjacent_word_read)
{
constexpr uint8_t val = 0x1;
write_byte_to_port(byte_port_start, val);
auto expected = val | 0xff << 8;
EXPECT_EQ(read_word_from_port(byte_port_start), expected);
expected = 0xff | val << 8;
EXPECT_EQ(read_word_from_port(byte_port_start - 1), expected);
expected = val | 0xff << 8 | 0xff << 16 | 0xff << 24;
EXPECT_EQ(read_dword_from_port(byte_port_start), expected);
expected = 0xff | val << 8 | 0xff << 16 | 0xff << 24;
EXPECT_EQ(read_dword_from_port(byte_port_start - 1), expected);
expected = 0xff | 0xff << 8 | val << 16 | 0xff << 24;
EXPECT_EQ(read_dword_from_port(byte_port_start - 2), expected);
expected = 0xff | 0xff << 8 | 0xff << 16 | val << 24;
EXPECT_EQ(read_dword_from_port(byte_port_start - 3), expected);
}
TEST(iohandler_containers, adjacent_dword_read)
{
constexpr uint16_t val = 0x1;
write_word_to_port(word_port_start, val);
auto expected = val | 0xffff << 16;
EXPECT_EQ(read_dword_from_port(word_port_start), expected);
expected = 0xffff | val << 16;
EXPECT_EQ(read_dword_from_port(word_port_start - 2), expected);
}
TEST(iohandler_containers, adjacent_word_write)
{
constexpr uint16_t val = 2 << 8;
write_word_to_port(byte_port_start - 1, val);
EXPECT_EQ(read_byte_from_port(byte_port_start), val >> 8);
}
TEST(iohandler_containers, adjacent_dword_write)
{
constexpr uint32_t val = 2 << 16;
write_dword_to_port(word_port_start - 2, val);
EXPECT_EQ(read_word_from_port(word_port_start), val >> 16);
}
} // namespace
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