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project64/Source/Project64/N64 System/Mips/System Timing.cpp

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/****************************************************************************
* *
* Project 64 - A Nintendo 64 emulator. *
* http://www.pj64-emu.com/ *
* Copyright (C) 2012 Project64. All rights reserved. *
* *
* License: *
* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
* *
****************************************************************************/
#include "stdafx.h"
CSystemTimer::CSystemTimer( int & NextTimer ) :
m_NextTimer(NextTimer),
m_inFixTimer(false)
{
}
void CSystemTimer::Reset()
{
//initialise Structure
for (int i = 0; i < MaxTimer; i++)
{
m_TimerDetatils[i].Active = false;
m_TimerDetatils[i].CyclesToTimer = 0;
}
m_Current = UnknownTimer;
m_LastUpdate = 0;
m_NextTimer = 0;
SetTimer(ViTimer,50000,false);
SetCompareTimer();
}
void CSystemTimer::SetTimer ( TimerType Type, DWORD Cycles, bool bRelative )
{
if (Type >= MaxTimer || Type == UnknownTimer)
{
g_Notify->BreakPoint(__FILEW__,__LINE__);
return;
}
UpdateTimers();
m_TimerDetatils[Type].Active = true;
if (bRelative)
{
if (m_TimerDetatils[Type].Active)
{
m_TimerDetatils[Type].CyclesToTimer += Cycles; //Add to the timer
}
else
{
m_TimerDetatils[Type].CyclesToTimer = (__int64)Cycles - (__int64)m_NextTimer; //replace the new cycles
}
}
else
{
m_TimerDetatils[Type].CyclesToTimer = (__int64)Cycles - (__int64)m_NextTimer; //replace the new cycles
}
FixTimers();
}
DWORD CSystemTimer::GetTimer ( TimerType Type )
{
if (Type >= MaxTimer || Type == UnknownTimer)
{
g_Notify->BreakPoint(__FILEW__,__LINE__);
return 0;
}
if (!m_TimerDetatils[Type].Active)
{
return 0;
}
__int64 CyclesToTimer = m_TimerDetatils[Type].CyclesToTimer + m_NextTimer;
if (CyclesToTimer < 0)
{
return 0;
}
if (CyclesToTimer > 0x7FFFFFFF)
{
return 0x7FFFFFFF;
}
return (DWORD)CyclesToTimer;
}
void CSystemTimer::StopTimer ( TimerType Type )
{
if (Type >= MaxTimer || Type == UnknownTimer)
{
g_Notify->BreakPoint(__FILEW__,__LINE__);
return;
}
m_TimerDetatils[Type].Active = false;
FixTimers();
}
void CSystemTimer::FixTimers()
{
if (m_inFixTimer)
{
return;
}
m_inFixTimer = true;
UpdateTimers();
if (GetTimer(CompareTimer) > 0x60000000)
{
SetCompareTimer();
}
//Update the cycles for the remaining number of cycles to timer
int count;
for (count = 0; count < MaxTimer; count++)
{
if (!m_TimerDetatils[count].Active)
{
continue;
}
m_TimerDetatils[count].CyclesToTimer += m_NextTimer;
}
//Set Max timer
m_NextTimer = 0x7FFFFFFF;
//Find the smallest timer left to go
for (count = 0; count < MaxTimer; count++)
{
if (!m_TimerDetatils[count].Active)
{
continue;
}
if (m_TimerDetatils[count].CyclesToTimer >= m_NextTimer)
{
continue;
}
m_NextTimer = (int)m_TimerDetatils[count].CyclesToTimer;
m_Current = (TimerType)count;
}
//Move the timer back this value
for (count = 0; count < MaxTimer; count++)
{
if (!m_TimerDetatils[count].Active)
{
continue;
}
m_TimerDetatils[count].CyclesToTimer -= m_NextTimer;
}
m_LastUpdate = m_NextTimer;
m_inFixTimer = false;
}
void CSystemTimer::UpdateTimers()
{
int TimeTaken = m_LastUpdate - m_NextTimer;
if (TimeTaken != 0)
{
m_LastUpdate = m_NextTimer;
g_Reg->COUNT_REGISTER += TimeTaken;
g_Reg->RANDOM_REGISTER -= TimeTaken / g_System->CountPerOp();
while ((int)g_Reg->RANDOM_REGISTER < (int)g_Reg->WIRED_REGISTER)
{
g_Reg->RANDOM_REGISTER += 32 - g_Reg->WIRED_REGISTER;
}
}
}
void CSystemTimer::TimerDone()
{
UpdateTimers();
/* DWORD LastTimer;
if (Profiling)
{
LastTimer = StartTimer(Timer_Done);
}
if (LogOptions.GenerateLog && LogOptions.LogExceptions && !LogOptions.NoInterrupts)
{
LogMessage("%08X: Timer Done (Type: %d CurrentTimer: %d)", *_PROGRAM_COUNTER, m_Current, *_Timer );
}
*/
switch (m_Current)
{
case CSystemTimer::CompareTimer:
g_Reg->FAKE_CAUSE_REGISTER |= CAUSE_IP7;
g_Reg->CheckInterrupts();
UpdateCompareTimer();
break;
case CSystemTimer::SoftResetTimer:
g_SystemTimer->StopTimer(CSystemTimer::SoftResetTimer);
g_System->ExternalEvent(SysEvent_ResetCPU_SoftDone);
break;
case CSystemTimer::SiTimer:
g_SystemTimer->StopTimer(CSystemTimer::SiTimer);
g_Reg->MI_INTR_REG |= MI_INTR_SI;
g_Reg->SI_STATUS_REG |= SI_STATUS_INTERRUPT;
g_Reg->CheckInterrupts();
break;
case CSystemTimer::PiTimer:
g_SystemTimer->StopTimer(CSystemTimer::PiTimer);
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
break;
case CSystemTimer::ViTimer:
try
{
g_System->RefreshScreen();
}
catch (...)
{
WriteTraceF(TraceError,__FUNCTION__ ": Exception caught\nFile: %s\nLine: %d",__FILE__,__LINE__);
}
g_Reg->MI_INTR_REG |= MI_INTR_VI;
g_Reg->CheckInterrupts();
break;
case CSystemTimer::RspTimer:
g_SystemTimer->StopTimer(CSystemTimer::RspTimer);
try
{
g_System->RunRSP();
}
catch (...)
{
g_Notify->BreakPoint(__FILEW__,__LINE__);
}
break;
case CSystemTimer::RSPTimerDlist:
g_SystemTimer->StopTimer(CSystemTimer::RSPTimerDlist);
g_Reg->m_GfxIntrReg |= MI_INTR_DP;
g_Reg->CheckInterrupts();
break;
case CSystemTimer::AiTimerInterrupt:
g_SystemTimer->StopTimer(CSystemTimer::AiTimerInterrupt);
g_Audio->InterruptTimerDone();
break;
case CSystemTimer::AiTimerBusy:
g_SystemTimer->StopTimer(CSystemTimer::AiTimerBusy);
g_Audio->BusyTimerDone();
break;
default:
g_Notify->BreakPoint(__FILEW__,__LINE__);
}
//CheckTimer();
/*if (Profiling)
{
StartTimer(LastTimer);
}*/
}
void CSystemTimer::SetCompareTimer()
{
DWORD NextCompare = 0x7FFFFFFF;
if (g_Reg)
{
NextCompare = g_Reg->COMPARE_REGISTER - g_Reg->COUNT_REGISTER;
if ((NextCompare & 0x80000000) != 0)
{
NextCompare = 0x7FFFFFFF;
}
}
SetTimer(CompareTimer,NextCompare,false);
}
void CSystemTimer::UpdateCompareTimer ( void )
{
SetCompareTimer();
}
bool CSystemTimer::SaveAllowed ( void )
{
if (GetTimer(CompareTimer) <= 0)
{
return false;
}
for (int i = 0; i < MaxTimer; i++)
{
if (i == CompareTimer)
{
continue;
}
if (i == ViTimer)
{
continue;
}
if (m_TimerDetatils[i].Active)
{
return false;
}
}
return true;
}
void CSystemTimer::SaveData ( void * file ) const
{
DWORD TimerDetailsSize = sizeof(TIMER_DETAILS);
DWORD Entries = sizeof(m_TimerDetatils)/sizeof(m_TimerDetatils[0]);
zipWriteInFileInZip(file,&TimerDetailsSize,sizeof(TimerDetailsSize));
zipWriteInFileInZip(file,&Entries,sizeof(Entries));
zipWriteInFileInZip(file,(void *)&m_TimerDetatils,sizeof(m_TimerDetatils));
zipWriteInFileInZip(file,(void *)&m_LastUpdate,sizeof(m_LastUpdate));
zipWriteInFileInZip(file,&m_NextTimer,sizeof(m_NextTimer));
zipWriteInFileInZip(file,(void *)&m_Current,sizeof(m_Current));
}
void CSystemTimer::LoadData ( void * file )
{
DWORD TimerDetailsSize, Entries;
unzReadCurrentFile( file,&TimerDetailsSize,sizeof(TimerDetailsSize));
unzReadCurrentFile( file,&Entries,sizeof(Entries));
if (TimerDetailsSize != sizeof(TIMER_DETAILS))
{
g_Notify->BreakPoint(__FILEW__,__LINE__);
return;
}
if (Entries != sizeof(m_TimerDetatils)/sizeof(m_TimerDetatils[0]))
{
g_Notify->BreakPoint(__FILEW__,__LINE__);
return;
}
unzReadCurrentFile(file,(void *)&m_TimerDetatils,sizeof(m_TimerDetatils));
unzReadCurrentFile(file,(void *)&m_LastUpdate,sizeof(m_LastUpdate));
unzReadCurrentFile(file,&m_NextTimer,sizeof(m_NextTimer));
unzReadCurrentFile(file,(void *)&m_Current,sizeof(m_Current));
}
void CSystemTimer::RecordDifference( CLog &LogFile, const CSystemTimer& rSystemTimer)
{
if (m_LastUpdate != rSystemTimer.m_LastUpdate)
{
LogFile.LogF("Timer-LastUpdate: %X %X\r\n",m_LastUpdate,rSystemTimer.m_LastUpdate);
}
if (m_NextTimer != rSystemTimer.m_NextTimer)
{
LogFile.LogF("Timer-NextTimer: %X %X\r\n",m_NextTimer,rSystemTimer.m_NextTimer);
}
if (m_Current != rSystemTimer.m_Current)
{
LogFile.LogF("Timer-Current %X %X\r\n",m_Current,rSystemTimer.m_Current);
}
if (m_inFixTimer != rSystemTimer.m_inFixTimer)
{
LogFile.LogF("Timer-inFixTimer %X %X\r\n",(int)m_inFixTimer,(int)rSystemTimer.m_inFixTimer);
}
for (int i = 0; i < MaxTimer; i++)
{
if (m_TimerDetatils[i].Active != rSystemTimer.m_TimerDetatils[i].Active)
{
LogFile.LogF("Timer-m_TimerDetatils[%d] %X %X\r\n",i,(int)m_TimerDetatils[i].Active,(int)rSystemTimer.m_TimerDetatils[i].Active);
}
if (m_TimerDetatils[i].CyclesToTimer != rSystemTimer.m_TimerDetatils[i].CyclesToTimer)
{
LogFile.LogF("Timer-m_TimerDetatils[%d] 0x%08X, 0x%08X\r\n",i,(DWORD)m_TimerDetatils[i].CyclesToTimer,(DWORD)rSystemTimer.m_TimerDetatils[i].CyclesToTimer );
}
}
}
bool CSystemTimer::operator == (const CSystemTimer& rSystemTimer) const
{
if (m_LastUpdate != rSystemTimer.m_LastUpdate)
{
return false;
}
if (m_NextTimer != rSystemTimer.m_NextTimer)
{
return false;
}
if (m_Current != rSystemTimer.m_Current)
{
return false;
}
if (m_inFixTimer != rSystemTimer.m_inFixTimer)
{
return false;
}
for (int i = 0; i < MaxTimer; i++)
{
if (m_TimerDetatils[i].Active != rSystemTimer.m_TimerDetatils[i].Active)
{
return false;
}
if (m_TimerDetatils[i].CyclesToTimer != rSystemTimer.m_TimerDetatils[i].CyclesToTimer)
{
return false;
}
}
return true;
}
bool CSystemTimer::operator != (const CSystemTimer& rSystemTimer) const
{
return !(*this == rSystemTimer);
}
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