yuzu/src/core/cpu_core_manager.cpp
Lioncash 232d95b56e core: Relocate CPU core management to its own class
Keeps the CPU-specific behavior from being spread throughout the main
System class. This will also act as the home to contain member functions
that perform operations on all cores. The reason for this being that the
following pattern is sort of prevalent throughout sections of the
codebase:

If clearing the instruction cache for all 4 cores is necessary:

Core::System::GetInstance().ArmInterface(0).ClearInstructionCache();
Core::System::GetInstance().ArmInterface(1).ClearInstructionCache();
Core::System::GetInstance().ArmInterface(2).ClearInstructionCache();
Core::System::GetInstance().ArmInterface(3).ClearInstructionCache();

This is kind of... well, silly to copy around whenever it's needed.
especially when it can be reduced down to a single line.

This change also puts the basics in place to begin "ungrafting" all of the
forwarding member functions from the System class that are used to
access CPU state or invoke CPU-specific behavior. As such, this change
itself makes no changes to the direct external interface of System. This
will be covered by another changeset.
2018-11-22 04:28:19 -05:00

143 lines
4.1 KiB
C++

// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "core/arm/exclusive_monitor.h"
#include "core/core.h"
#include "core/core_cpu.h"
#include "core/cpu_core_manager.h"
#include "core/gdbstub/gdbstub.h"
#include "core/settings.h"
namespace Core {
namespace {
void RunCpuCore(const System& system, Cpu& cpu_state) {
while (system.IsPoweredOn()) {
cpu_state.RunLoop(true);
}
}
} // Anonymous namespace
CpuCoreManager::CpuCoreManager() = default;
CpuCoreManager::~CpuCoreManager() = default;
void CpuCoreManager::Initialize(System& system) {
barrier = std::make_unique<CpuBarrier>();
exclusive_monitor = Cpu::MakeExclusiveMonitor(cores.size());
for (std::size_t index = 0; index < cores.size(); ++index) {
cores[index] = std::make_unique<Cpu>(*exclusive_monitor, *barrier, index);
}
// 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()] = cores[0].get();
if (!Settings::values.use_multi_core) {
return;
}
for (std::size_t index = 0; index < core_threads.size(); ++index) {
core_threads[index] = std::make_unique<std::thread>(RunCpuCore, std::cref(system),
std::ref(*cores[index + 1]));
thread_to_cpu[core_threads[index]->get_id()] = cores[index + 1].get();
}
}
void CpuCoreManager::Shutdown() {
barrier->NotifyEnd();
if (Settings::values.use_multi_core) {
for (auto& thread : core_threads) {
thread->join();
thread.reset();
}
}
thread_to_cpu.clear();
for (auto& cpu_core : cores) {
cpu_core.reset();
}
exclusive_monitor.reset();
barrier.reset();
}
Cpu& CpuCoreManager::GetCore(std::size_t index) {
return *cores.at(index);
}
const Cpu& CpuCoreManager::GetCore(std::size_t index) const {
return *cores.at(index);
}
ExclusiveMonitor& CpuCoreManager::GetExclusiveMonitor() {
return *exclusive_monitor;
}
const ExclusiveMonitor& CpuCoreManager::GetExclusiveMonitor() const {
return *exclusive_monitor;
}
Cpu& CpuCoreManager::GetCurrentCore() {
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 *cores[active_core];
}
const Cpu& CpuCoreManager::GetCurrentCore() const {
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 *cores[active_core];
}
void CpuCoreManager::RunLoop(bool tight_loop) {
// Update thread_to_cpu in case Core 0 is run from a different host thread
thread_to_cpu[std::this_thread::get_id()] = cores[0].get();
if (GDBStub::IsServerEnabled()) {
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.
if (GDBStub::GetCpuHaltFlag()) {
if (GDBStub::GetCpuStepFlag()) {
tight_loop = false;
} else {
return;
}
}
}
for (active_core = 0; active_core < NUM_CPU_CORES; ++active_core) {
cores[active_core]->RunLoop(tight_loop);
if (Settings::values.use_multi_core) {
// Cores 1-3 are run on other threads in this mode
break;
}
}
if (GDBStub::IsServerEnabled()) {
GDBStub::SetCpuStepFlag(false);
}
}
void CpuCoreManager::InvalidateAllInstructionCaches() {
for (auto& cpu : cores) {
cpu->ArmInterface().ClearInstructionCache();
}
}
} // namespace Core