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CPU.cpp
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CPU.cpp
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// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "Common.h"
#include "Thread.h"
#include "../DSPEmulator.h"
#include "../PowerPC/PowerPC.h"
#include "../Host.h"
#include "../Core.h"
#include "CPU.h"
#include "DSP.h"
#include "Movie.h"
#include "VideoBackendBase.h"
namespace
{
static Common::Event m_StepEvent;
static Common::Event *m_SyncEvent;
static std::mutex m_csCpuOccupied;
}
void CCPU::Init(int cpu_core)
{
if (Movie::IsPlayingInput() && Movie::IsConfigSaved())
{
cpu_core = Movie::GetCPUMode();
}
PowerPC::Init(cpu_core);
m_SyncEvent = 0;
}
void CCPU::Shutdown()
{
PowerPC::Shutdown();
m_SyncEvent = 0;
}
void CCPU::Run()
{
std::lock_guard<std::mutex> lk(m_csCpuOccupied);
Host_UpdateDisasmDialog();
while (true)
{
reswitch:
switch (PowerPC::GetState())
{
case PowerPC::CPU_RUNNING:
//1: enter a fast runloop
PowerPC::RunLoop();
break;
case PowerPC::CPU_STEPPING:
m_csCpuOccupied.unlock();
//1: wait for step command..
m_StepEvent.Wait();
m_csCpuOccupied.lock();
if (PowerPC::GetState() == PowerPC::CPU_POWERDOWN)
return;
if (PowerPC::GetState() != PowerPC::CPU_STEPPING)
goto reswitch;
//3: do a step
PowerPC::SingleStep();
//4: update disasm dialog
if (m_SyncEvent) {
m_SyncEvent->Set();
m_SyncEvent = 0;
}
Host_UpdateDisasmDialog();
break;
case PowerPC::CPU_POWERDOWN:
//1: Exit loop!!
return;
}
}
}
void CCPU::Stop()
{
PowerPC::Stop();
m_StepEvent.Set();
}
bool CCPU::IsStepping()
{
return PowerPC::GetState() == PowerPC::CPU_STEPPING;
}
void CCPU::Reset()
{
}
void CCPU::StepOpcode(Common::Event *event)
{
m_StepEvent.Set();
if (PowerPC::GetState() == PowerPC::CPU_STEPPING)
{
m_SyncEvent = event;
}
}
void CCPU::EnableStepping(const bool _bStepping)
{
if (_bStepping)
{
PowerPC::Pause();
m_StepEvent.Reset();
g_video_backend->EmuStateChange(EMUSTATE_CHANGE_PAUSE);
DSP::GetDSPEmulator()->DSP_ClearAudioBuffer(true);
}
else
{
PowerPC::Start();
m_StepEvent.Set();
g_video_backend->EmuStateChange(EMUSTATE_CHANGE_PLAY);
DSP::GetDSPEmulator()->DSP_ClearAudioBuffer(false);
}
}
void CCPU::Break()
{
EnableStepping(true);
}
bool CCPU::PauseAndLock(bool doLock, bool unpauseOnUnlock)
{
bool wasUnpaused = !IsStepping();
if (doLock)
{
// we can't use EnableStepping, that would causes deadlocks with both audio and video
PowerPC::Pause();
if (!Core::IsCPUThread())
m_csCpuOccupied.lock();
}
else
{
if (unpauseOnUnlock)
{
PowerPC::Start();
m_StepEvent.Set();
}
if (!Core::IsCPUThread())
m_csCpuOccupied.unlock();
}
return wasUnpaused;
}