152 lines
4.4 KiB
C++
152 lines
4.4 KiB
C++
// Copyright 2018 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/assert.h"
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#include "core/arm/exclusive_monitor.h"
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#include "core/core.h"
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#include "core/core_cpu.h"
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#include "core/core_timing.h"
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#include "core/cpu_core_manager.h"
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#include "core/gdbstub/gdbstub.h"
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#include "core/settings.h"
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namespace Core {
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namespace {
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void RunCpuCore(const System& system, Cpu& cpu_state) {
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while (system.IsPoweredOn()) {
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cpu_state.RunLoop(true);
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}
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}
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} // Anonymous namespace
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CpuCoreManager::CpuCoreManager(System& system) : system{system} {}
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CpuCoreManager::~CpuCoreManager() = default;
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void CpuCoreManager::Initialize() {
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barrier = std::make_unique<CpuBarrier>();
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exclusive_monitor = Cpu::MakeExclusiveMonitor(cores.size());
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for (std::size_t index = 0; index < cores.size(); ++index) {
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cores[index] = std::make_unique<Cpu>(system, *exclusive_monitor, *barrier, index);
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}
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}
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void CpuCoreManager::StartThreads() {
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// Create threads for CPU cores 1-3, and build thread_to_cpu map
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// CPU core 0 is run on the main thread
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thread_to_cpu[std::this_thread::get_id()] = cores[0].get();
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if (!Settings::values.use_multi_core) {
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return;
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}
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for (std::size_t index = 0; index < core_threads.size(); ++index) {
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core_threads[index] = std::make_unique<std::thread>(RunCpuCore, std::cref(system),
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std::ref(*cores[index + 1]));
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thread_to_cpu[core_threads[index]->get_id()] = cores[index + 1].get();
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}
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}
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void CpuCoreManager::Shutdown() {
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barrier->NotifyEnd();
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if (Settings::values.use_multi_core) {
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for (auto& thread : core_threads) {
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thread->join();
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thread.reset();
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}
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}
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thread_to_cpu.clear();
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for (auto& cpu_core : cores) {
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cpu_core.reset();
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}
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exclusive_monitor.reset();
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barrier.reset();
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}
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Cpu& CpuCoreManager::GetCore(std::size_t index) {
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return *cores.at(index);
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}
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const Cpu& CpuCoreManager::GetCore(std::size_t index) const {
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return *cores.at(index);
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}
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ExclusiveMonitor& CpuCoreManager::GetExclusiveMonitor() {
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return *exclusive_monitor;
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}
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const ExclusiveMonitor& CpuCoreManager::GetExclusiveMonitor() const {
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return *exclusive_monitor;
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}
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Cpu& CpuCoreManager::GetCurrentCore() {
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if (Settings::values.use_multi_core) {
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const auto& search = thread_to_cpu.find(std::this_thread::get_id());
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ASSERT(search != thread_to_cpu.end());
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ASSERT(search->second);
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return *search->second;
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}
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// Otherwise, use single-threaded mode active_core variable
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return *cores[active_core];
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}
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const Cpu& CpuCoreManager::GetCurrentCore() const {
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if (Settings::values.use_multi_core) {
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const auto& search = thread_to_cpu.find(std::this_thread::get_id());
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ASSERT(search != thread_to_cpu.end());
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ASSERT(search->second);
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return *search->second;
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}
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// Otherwise, use single-threaded mode active_core variable
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return *cores[active_core];
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}
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void CpuCoreManager::RunLoop(bool tight_loop) {
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// Update thread_to_cpu in case Core 0 is run from a different host thread
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thread_to_cpu[std::this_thread::get_id()] = cores[0].get();
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if (GDBStub::IsServerEnabled()) {
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GDBStub::HandlePacket();
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// If the loop is halted and we want to step, use a tiny (1) number of instructions to
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// execute. Otherwise, get out of the loop function.
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if (GDBStub::GetCpuHaltFlag()) {
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if (GDBStub::GetCpuStepFlag()) {
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tight_loop = false;
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} else {
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return;
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}
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}
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}
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auto& core_timing = system.CoreTiming();
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core_timing.ResetRun();
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bool keep_running{};
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do {
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keep_running = false;
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for (active_core = 0; active_core < NUM_CPU_CORES; ++active_core) {
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core_timing.SwitchContext(active_core);
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if (core_timing.CurrentContextCanRun()) {
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cores[active_core]->RunLoop(tight_loop);
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}
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keep_running |= core_timing.CurrentContextCanRun();
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}
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} while (keep_running);
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if (GDBStub::IsServerEnabled()) {
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GDBStub::SetCpuStepFlag(false);
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}
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}
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void CpuCoreManager::InvalidateAllInstructionCaches() {
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for (auto& cpu : cores) {
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cpu->ArmInterface().ClearInstructionCache();
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}
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}
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} // namespace Core
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