suyu/src/core/core_cpu.cpp
Lioncash fad20213e6 kernel/scheduler: Pass in system instance in constructor
Avoids directly relying on the global system instance and instead makes
an arbitrary system instance an explicit dependency on construction.

This also allows removing dependencies on some global accessor functions
as well.
2019-03-04 17:01:37 -05:00

138 lines
3.6 KiB
C++

// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <condition_variable>
#include <mutex>
#include "common/logging/log.h"
#ifdef ARCHITECTURE_x86_64
#include "core/arm/dynarmic/arm_dynarmic.h"
#endif
#include "core/arm/exclusive_monitor.h"
#include "core/arm/unicorn/arm_unicorn.h"
#include "core/core.h"
#include "core/core_cpu.h"
#include "core/core_timing.h"
#include "core/hle/kernel/scheduler.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/lock.h"
#include "core/settings.h"
namespace Core {
void CpuBarrier::NotifyEnd() {
std::unique_lock<std::mutex> lock(mutex);
end = true;
condition.notify_all();
}
bool CpuBarrier::Rendezvous() {
if (!Settings::values.use_multi_core) {
// Meaningless when running in single-core mode
return true;
}
if (!end) {
std::unique_lock<std::mutex> lock(mutex);
--cores_waiting;
if (!cores_waiting) {
cores_waiting = NUM_CPU_CORES;
condition.notify_all();
return true;
}
condition.wait(lock);
return true;
}
return false;
}
Cpu::Cpu(System& system, ExclusiveMonitor& exclusive_monitor, CpuBarrier& cpu_barrier,
std::size_t core_index)
: cpu_barrier{cpu_barrier}, core_timing{system.CoreTiming()}, core_index{core_index} {
if (Settings::values.use_cpu_jit) {
#ifdef ARCHITECTURE_x86_64
arm_interface = std::make_unique<ARM_Dynarmic>(core_timing, exclusive_monitor, core_index);
#else
arm_interface = std::make_unique<ARM_Unicorn>();
LOG_WARNING(Core, "CPU JIT requested, but Dynarmic not available");
#endif
} else {
arm_interface = std::make_unique<ARM_Unicorn>(core_timing);
}
scheduler = std::make_unique<Kernel::Scheduler>(system, *arm_interface);
}
Cpu::~Cpu() = default;
std::unique_ptr<ExclusiveMonitor> Cpu::MakeExclusiveMonitor(std::size_t num_cores) {
if (Settings::values.use_cpu_jit) {
#ifdef ARCHITECTURE_x86_64
return std::make_unique<DynarmicExclusiveMonitor>(num_cores);
#else
return nullptr; // TODO(merry): Passthrough exclusive monitor
#endif
} else {
return nullptr; // TODO(merry): Passthrough exclusive monitor
}
}
void Cpu::RunLoop(bool tight_loop) {
// Wait for all other CPU cores to complete the previous slice, such that they run in lock-step
if (!cpu_barrier.Rendezvous()) {
// If rendezvous failed, session has been killed
return;
}
// If we don't have a currently active thread then don't execute instructions,
// instead advance to the next event and try to yield to the next thread
if (Kernel::GetCurrentThread() == nullptr) {
LOG_TRACE(Core, "Core-{} idling", core_index);
if (IsMainCore()) {
// TODO(Subv): Only let CoreTiming idle if all 4 cores are idling.
core_timing.Idle();
core_timing.Advance();
}
PrepareReschedule();
} else {
if (IsMainCore()) {
core_timing.Advance();
}
if (tight_loop) {
arm_interface->Run();
} else {
arm_interface->Step();
}
}
Reschedule();
}
void Cpu::SingleStep() {
return RunLoop(false);
}
void Cpu::PrepareReschedule() {
arm_interface->PrepareReschedule();
reschedule_pending = true;
}
void Cpu::Reschedule() {
if (!reschedule_pending) {
return;
}
reschedule_pending = false;
// Lock the global kernel mutex when we manipulate the HLE state
std::lock_guard<std::recursive_mutex> lock(HLE::g_hle_lock);
scheduler->Reschedule();
}
} // namespace Core