135 lines
3.5 KiB
C++
135 lines
3.5 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 <condition_variable>
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#include <mutex>
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#include "common/logging/log.h"
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#ifdef ARCHITECTURE_x86_64
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#include "core/arm/dynarmic/arm_dynarmic.h"
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#endif
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#include "core/arm/unicorn/arm_unicorn.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/hle/kernel/scheduler.h"
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#include "core/hle/kernel/thread.h"
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#include "core/hle/lock.h"
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#include "core/settings.h"
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namespace Core {
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void CpuBarrier::NotifyEnd() {
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std::unique_lock<std::mutex> lock(mutex);
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end = true;
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condition.notify_all();
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}
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bool CpuBarrier::Rendezvous() {
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if (!Settings::values.use_multi_core) {
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// Meaningless when running in single-core mode
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return true;
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}
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if (!end) {
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std::unique_lock<std::mutex> lock(mutex);
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--cores_waiting;
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if (!cores_waiting) {
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cores_waiting = NUM_CPU_CORES;
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condition.notify_all();
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return true;
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}
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condition.wait(lock);
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return true;
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}
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return false;
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}
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Cpu::Cpu(std::shared_ptr<ExclusiveMonitor> exclusive_monitor,
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std::shared_ptr<CpuBarrier> cpu_barrier, size_t core_index)
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: cpu_barrier{std::move(cpu_barrier)}, core_index{core_index} {
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if (Settings::values.use_cpu_jit) {
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#ifdef ARCHITECTURE_x86_64
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arm_interface = std::make_shared<ARM_Dynarmic>(exclusive_monitor, core_index);
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#else
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arm_interface = std::make_shared<ARM_Unicorn>();
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LOG_WARNING(Core, "CPU JIT requested, but Dynarmic not available");
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#endif
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} else {
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arm_interface = std::make_shared<ARM_Unicorn>();
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}
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scheduler = std::make_shared<Kernel::Scheduler>(arm_interface.get());
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}
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std::shared_ptr<ExclusiveMonitor> Cpu::MakeExclusiveMonitor(size_t num_cores) {
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if (Settings::values.use_cpu_jit) {
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#ifdef ARCHITECTURE_x86_64
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return std::make_shared<DynarmicExclusiveMonitor>(num_cores);
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#else
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return nullptr; // TODO(merry): Passthrough exclusive monitor
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#endif
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} else {
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return nullptr; // TODO(merry): Passthrough exclusive monitor
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}
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}
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void Cpu::RunLoop(bool tight_loop) {
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// Wait for all other CPU cores to complete the previous slice, such that they run in lock-step
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if (!cpu_barrier->Rendezvous()) {
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// If rendezvous failed, session has been killed
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return;
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}
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// If we don't have a currently active thread then don't execute instructions,
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// instead advance to the next event and try to yield to the next thread
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if (Kernel::GetCurrentThread() == nullptr) {
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LOG_TRACE(Core, "Core-{} idling", core_index);
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if (IsMainCore()) {
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// TODO(Subv): Only let CoreTiming idle if all 4 cores are idling.
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CoreTiming::Idle();
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CoreTiming::Advance();
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}
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PrepareReschedule();
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} else {
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if (IsMainCore()) {
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CoreTiming::Advance();
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}
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if (tight_loop) {
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arm_interface->Run();
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} else {
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arm_interface->Step();
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}
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}
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Reschedule();
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}
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void Cpu::SingleStep() {
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return RunLoop(false);
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}
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void Cpu::PrepareReschedule() {
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arm_interface->PrepareReschedule();
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reschedule_pending = true;
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}
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void Cpu::Reschedule() {
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if (!reschedule_pending) {
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return;
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}
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reschedule_pending = false;
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// Lock the global kernel mutex when we manipulate the HLE state
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std::lock_guard<std::recursive_mutex> lock(HLE::g_hle_lock);
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scheduler->Reschedule();
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}
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} // namespace Core
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