yuzu/src/core/core.cpp

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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <memory>
#include <utility>
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#include "common/logging/log.h"
#include "common/string_util.h"
#include "core/core.h"
#include "core/core_timing.h"
#include "core/gdbstub/gdbstub.h"
#include "core/hle/kernel/client_port.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/service/service.h"
#include "core/hle/service/sm/controller.h"
#include "core/hle/service/sm/sm.h"
#include "core/loader/loader.h"
#include "core/settings.h"
#include "file_sys/vfs_concat.h"
#include "file_sys/vfs_real.h"
#include "video_core/renderer_base.h"
#include "video_core/video_core.h"
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namespace Core {
/*static*/ System System::s_instance;
System::System() = default;
System::~System() = default;
/// Runs a CPU core while the system is powered on
static void RunCpuCore(std::shared_ptr<Cpu> cpu_state) {
while (Core::System::GetInstance().IsPoweredOn()) {
cpu_state->RunLoop(true);
}
}
Cpu& System::CurrentCpuCore() {
// If multicore is enabled, use host thread to figure out the current CPU core
if (Settings::values.use_multi_core) {
const auto& search = thread_to_cpu.find(std::this_thread::get_id());
ASSERT(search != thread_to_cpu.end());
ASSERT(search->second);
return *search->second;
}
// Otherwise, use single-threaded mode active_core variable
return *cpu_cores[active_core];
}
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System::ResultStatus System::RunLoop(bool tight_loop) {
status = ResultStatus::Success;
// Update thread_to_cpu in case Core 0 is run from a different host thread
thread_to_cpu[std::this_thread::get_id()] = cpu_cores[0];
if (GDBStub::IsServerEnabled()) {
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GDBStub::HandlePacket();
// If the loop is halted and we want to step, use a tiny (1) number of instructions to
// execute. Otherwise, get out of the loop function.
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if (GDBStub::GetCpuHaltFlag()) {
if (GDBStub::GetCpuStepFlag()) {
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tight_loop = false;
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} else {
return ResultStatus::Success;
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}
}
}
for (active_core = 0; active_core < NUM_CPU_CORES; ++active_core) {
cpu_cores[active_core]->RunLoop(tight_loop);
if (Settings::values.use_multi_core) {
// Cores 1-3 are run on other threads in this mode
break;
}
}
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if (GDBStub::IsServerEnabled()) {
GDBStub::SetCpuStepFlag(false);
}
return status;
}
System::ResultStatus System::SingleStep() {
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return RunLoop(false);
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}
static FileSys::VirtualFile GetGameFileFromPath(const FileSys::VirtualFilesystem& vfs,
const std::string& path) {
// To account for split 00+01+etc files.
std::string dir_name;
std::string filename;
Common::SplitPath(path, &dir_name, &filename, nullptr);
if (filename == "00") {
const auto dir = vfs->OpenDirectory(dir_name, FileSys::Mode::Read);
std::vector<FileSys::VirtualFile> concat;
for (u8 i = 0; i < 0x10; ++i) {
auto next = dir->GetFile(fmt::format("{:02X}", i));
if (next != nullptr)
concat.push_back(std::move(next));
else {
next = dir->GetFile(fmt::format("{:02x}", i));
if (next != nullptr)
concat.push_back(std::move(next));
else
break;
}
}
if (concat.empty())
return nullptr;
return FileSys::ConcatenateFiles(concat, dir->GetName());
}
return vfs->OpenFile(path, FileSys::Mode::Read);
}
System::ResultStatus System::Load(Frontend::EmuWindow& emu_window, const std::string& filepath) {
app_loader = Loader::GetLoader(GetGameFileFromPath(virtual_filesystem, filepath));
if (!app_loader) {
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LOG_CRITICAL(Core, "Failed to obtain loader for {}!", filepath);
return ResultStatus::ErrorGetLoader;
}
std::pair<boost::optional<u32>, Loader::ResultStatus> system_mode =
app_loader->LoadKernelSystemMode();
if (system_mode.second != Loader::ResultStatus::Success) {
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LOG_CRITICAL(Core, "Failed to determine system mode (Error {})!",
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static_cast<int>(system_mode.second));
return ResultStatus::ErrorSystemMode;
}
ResultStatus init_result{Init(emu_window)};
if (init_result != ResultStatus::Success) {
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LOG_CRITICAL(Core, "Failed to initialize system (Error {})!",
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static_cast<int>(init_result));
System::Shutdown();
return init_result;
}
const Loader::ResultStatus load_result{app_loader->Load(current_process)};
if (load_result != Loader::ResultStatus::Success) {
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LOG_CRITICAL(Core, "Failed to load ROM (Error {})!", static_cast<int>(load_result));
System::Shutdown();
return static_cast<ResultStatus>(static_cast<u32>(ResultStatus::ErrorLoader) +
static_cast<u32>(load_result));
}
status = ResultStatus::Success;
return status;
}
void System::PrepareReschedule() {
CurrentCpuCore().PrepareReschedule();
}
PerfStats::Results System::GetAndResetPerfStats() {
return perf_stats.GetAndResetStats(CoreTiming::GetGlobalTimeUs());
}
const std::shared_ptr<Kernel::Scheduler>& System::Scheduler(size_t core_index) {
ASSERT(core_index < NUM_CPU_CORES);
return cpu_cores[core_index]->Scheduler();
}
ARM_Interface& System::ArmInterface(size_t core_index) {
ASSERT(core_index < NUM_CPU_CORES);
return cpu_cores[core_index]->ArmInterface();
}
Cpu& System::CpuCore(size_t core_index) {
ASSERT(core_index < NUM_CPU_CORES);
return *cpu_cores[core_index];
}
System::ResultStatus System::Init(Frontend::EmuWindow& emu_window) {
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LOG_DEBUG(HW_Memory, "initialized OK");
CoreTiming::Init();
// Create a default fs if one doesn't already exist.
if (virtual_filesystem == nullptr)
virtual_filesystem = std::make_shared<FileSys::RealVfsFilesystem>();
current_process = Kernel::Process::Create("main");
cpu_barrier = std::make_shared<CpuBarrier>();
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cpu_exclusive_monitor = Cpu::MakeExclusiveMonitor(cpu_cores.size());
for (size_t index = 0; index < cpu_cores.size(); ++index) {
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cpu_cores[index] = std::make_shared<Cpu>(cpu_exclusive_monitor, cpu_barrier, index);
}
telemetry_session = std::make_unique<Core::TelemetrySession>();
service_manager = std::make_shared<Service::SM::ServiceManager>();
Kernel::Init();
Service::Init(service_manager, virtual_filesystem);
GDBStub::Init();
renderer = VideoCore::CreateRenderer(emu_window);
if (!renderer->Init()) {
return ResultStatus::ErrorVideoCore;
}
gpu_core = std::make_unique<Tegra::GPU>(renderer->Rasterizer());
// Create threads for CPU cores 1-3, and build thread_to_cpu map
// CPU core 0 is run on the main thread
thread_to_cpu[std::this_thread::get_id()] = cpu_cores[0];
if (Settings::values.use_multi_core) {
for (size_t index = 0; index < cpu_core_threads.size(); ++index) {
cpu_core_threads[index] =
std::make_unique<std::thread>(RunCpuCore, cpu_cores[index + 1]);
thread_to_cpu[cpu_core_threads[index]->get_id()] = cpu_cores[index + 1];
}
}
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LOG_DEBUG(Core, "Initialized OK");
// Reset counters and set time origin to current frame
GetAndResetPerfStats();
perf_stats.BeginSystemFrame();
return ResultStatus::Success;
}
void System::Shutdown() {
// Log last frame performance stats
auto perf_results = GetAndResetPerfStats();
Telemetry().AddField(Telemetry::FieldType::Performance, "Shutdown_EmulationSpeed",
perf_results.emulation_speed * 100.0);
Telemetry().AddField(Telemetry::FieldType::Performance, "Shutdown_Framerate",
perf_results.game_fps);
Telemetry().AddField(Telemetry::FieldType::Performance, "Shutdown_Frametime",
perf_results.frametime * 1000.0);
// Shutdown emulation session
renderer.reset();
GDBStub::Shutdown();
Service::Shutdown();
Kernel::Shutdown();
service_manager.reset();
telemetry_session.reset();
gpu_core.reset();
// Close all CPU/threading state
cpu_barrier->NotifyEnd();
if (Settings::values.use_multi_core) {
for (auto& thread : cpu_core_threads) {
thread->join();
thread.reset();
}
}
thread_to_cpu.clear();
for (auto& cpu_core : cpu_cores) {
cpu_core.reset();
}
cpu_barrier.reset();
// Close core timing
CoreTiming::Shutdown();
// Close app loader
app_loader.reset();
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LOG_DEBUG(Core, "Shutdown OK");
}
Service::SM::ServiceManager& System::ServiceManager() {
return *service_manager;
}
const Service::SM::ServiceManager& System::ServiceManager() const {
return *service_manager;
}
} // namespace Core