archived-pcsx2/pcsx2/System.cpp

/*  Pcsx2 - Pc Ps2 Emulator
 *  Copyright (C) 2002-2009  Pcsx2 Team
 *
 *  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; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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 for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "PrecompiledHeader.h"

#include "HostGui.h"

#include "Common.h"
#include "VUmicro.h"
#include "iR5900.h"
#include "R3000A.h"
#include "IopMem.h"
#include "sVU_zerorec.h"		// for SuperVUReset

#include "R5900Exceptions.h"

#include "CDVD/CDVD.h"
#include "ps2/CoreEmuThread.h"

using namespace std;

Pcsx2Config EmuConfig;

// disable all session overrides by default...
SessionOverrideFlags	g_Session = {false};
CoreEmuThread*			g_EmuThread;

bool sysInitialized = false;

// -----------------------------------------------------------------------
// This function should be called once during program execution.
//
void SysDetect()
{
	using namespace Console;

	if( sysInitialized ) return;
	sysInitialized = true;

	Notice("PCSX2 " PCSX2_VERSION " - compiled on " __DATE__ );
	Notice("Savestate version: %x", params g_SaveVersion);

	cpudetectInit();

	SetColor( Color_Black );

	WriteLn( "x86Init:" );
	WriteLn( wxsFormat(
		L"\tCPU vendor name  =  %s\n"
		L"\tFamilyID         =  %x\n"
		L"\tx86Family        =  %s\n"
		L"\tCPU speed        =  %d.%03d Ghz\n"
		L"\tCores            =  %d physical [%d logical]\n"
		L"\tx86PType         =  %s\n"
		L"\tx86Flags         =  %8.8x %8.8x\n"
		L"\tx86EFlags        =  %8.8x\n",
			wxString::FromAscii( x86caps.VendorName ).c_str(), x86caps.StepID,
			wxString::FromAscii( x86caps.FamilyName ).Trim().Trim(false).c_str(), 
			x86caps.Speed / 1000, x86caps.Speed%1000,
			x86caps.PhysicalCores, x86caps.LogicalCores,
			wxString::FromAscii( x86caps.TypeName ).c_str(),
			x86caps.Flags, x86caps.Flags2,
			x86caps.EFlags
	) );

	WriteLn( "Features:" );
	WriteLn(
		"\t%sDetected MMX\n"
		"\t%sDetected SSE\n"
		"\t%sDetected SSE2\n"
		"\t%sDetected SSE3\n"
		"\t%sDetected SSSE3\n"
		"\t%sDetected SSE4.1\n"
		"\t%sDetected SSE4.2\n", params
			x86caps.hasMultimediaExtensions     ? "" : "Not ",
			x86caps.hasStreamingSIMDExtensions  ? "" : "Not ",
			x86caps.hasStreamingSIMD2Extensions ? "" : "Not ",
			x86caps.hasStreamingSIMD3Extensions ? "" : "Not ",
			x86caps.hasSupplementalStreamingSIMD3Extensions ? "" : "Not ",
			x86caps.hasStreamingSIMD4Extensions  ? "" : "Not ",
			x86caps.hasStreamingSIMD4Extensions2 ? "" : "Not "
	);

	if ( x86caps.VendorName[0] == 'A' ) //AMD cpu
	{
		WriteLn( " Extended AMD Features:" );
		WriteLn(
			"\t%sDetected MMX2\n"
			"\t%sDetected 3DNOW\n"
			"\t%sDetected 3DNOW2\n"
			"\t%sDetected SSE4a\n", params
			x86caps.hasMultimediaExtensionsExt       ? "" : "Not ",
			x86caps.has3DNOWInstructionExtensions    ? "" : "Not ",
			x86caps.has3DNOWInstructionExtensionsExt ? "" : "Not ",
			x86caps.hasStreamingSIMD4ExtensionsA     ? "" : "Not "
		);
	}

	Console::ClearColor();
}

//////////////////////////////////////////////////////////////////////////////////////////
// Allocates memory for all PS2 systems.
bool SysAllocateMem()
{
	// Allocate PS2 system ram space (required by interpreters and recompilers both)

	try
	{
		vtlb_Core_Alloc();
		memAlloc();
		psxMemAlloc();
		vuMicroMemAlloc();
	}
	catch( Exception::OutOfMemory& )
	{
		// TODO : Should this error be handled here or allowed to be handled by the main
		// exception handler?

		// Failures on the core initialization of memory is bad, since it means the emulator is
		// completely non-functional.
		
		//Msgbox::Alert( "Failed to allocate memory needed to run pcsx2.\n\nError: %s", params ex.cMessage() );
		SysShutdownMem();
		return false;
	}

	return true;
}

//////////////////////////////////////////////////////////////////////////////////////////
// Allocates memory for all recompilers, and force-disables any recs that fail to initialize.
// This should be done asap, since the recompilers tend to demand a lot of system resources,
// and prefer to have those resources at specific address ranges.  The sooner memory is
// allocated, the better.
//
// Returns FALSE on *critical* failure (GUI should issue a msg and exit).
void SysAllocateDynarecs()
{
	// Attempt to initialize the recompilers.
	// Most users want to use recs anyway, and if they are using interpreters I don't think the
	// extra few megs of allocation is going to be an issue.

	try
	{
		// R5900 and R3000a must be rec-enabled together for now so if either fails they both fail.
		recCpu.Allocate();
		psxRec.Allocate();
	}
	catch( Exception::BaseException& )
	{
		// TODO : Fix this message.  It should respond according to the user's
		// currently configured recompiler.interpreter options, for example.
		
		/*Msgbox::Alert(
			"The EE/IOP recompiler failed to initialize with the following error:\n\n"
			"%s"
			"\n\nThe EE/IOP interpreter will be used instead (slow!).", params
			ex.cMessage()
		);*/

		g_Session.ForceDisableEErec = true;

		recCpu.Shutdown();
		psxRec.Shutdown();
	}

	try
	{
		VU0micro::recAlloc();
	}
	catch( Exception::BaseException& )
	{

		// TODO : Fix this message.  It should respond according to the user's
		// currently configured recompiler.interpreter options, for example.
/*
		Msgbox::Alert(
			"The VU0 recompiler failed to initialize with the following error:\n\n"
			"%s"
			"\n\nThe VU0 interpreter will be used for this session (may slow down some games).", params
			ex.cMessage()
		);
*/

		g_Session.ForceDisableVU0rec = true;
		VU0micro::recShutdown();
	}

	try
	{
		VU1micro::recAlloc();
	}
	catch( Exception::BaseException& )
	{

		// TODO : Fix this message.  It should respond according to the user's
		// currently configured recompiler.interpreter options, for example.
/*
		Msgbox::Alert(
			"The VU1 recompiler failed to initialize with the following error:\n\n"
			"%s"
			"\n\nThe VU1 interpreter will be used for this session (will slow down most games).", params 
			ex.cMessage()
		);
*/

		g_Session.ForceDisableVU1rec = true;
		VU1micro::recShutdown();
	}

	// If both VUrecs failed, then make sure the SuperVU is totally closed out:
	if( !CHECK_VU0REC && !CHECK_VU1REC)
		SuperVUDestroy( -1 );

}

//////////////////////////////////////////////////////////////////////////////////////////
// This should be called last thing before Pcsx2 exits.
//
void SysShutdownMem()
{
	vuMicroMemShutdown();
	psxMemShutdown();
	memShutdown();
	vtlb_Core_Shutdown();
}

//////////////////////////////////////////////////////////////////////////////////////////
// This should generally be called right before calling SysShutdownMem(), although you can optionally
// use it in conjunction with SysAllocDynarecs to allocate/free the dynarec resources on the fly (as
// risky as it might be, since dynarecs could very well fail on the second attempt).
void SysShutdownDynarecs()
{
	// Special SuperVU "complete" terminator.
	SuperVUDestroy( -1 );

	psxRec.Shutdown();
	recCpu.Shutdown();
}


//////////////////////////////////////////////////////////////////////////////////////////
// Resets all PS2 cpu execution caches, which does not affect that actual PS2 state/condition.
// This can be called at any time outside the context of a Cpu->Execute() block without
// bad things happening (recompilers will slow down for a brief moment since rec code blocks
// are dumped).
// Use this method to reset the recs when important global pointers like the MTGS are re-assigned.
void SysClearExecutionCache()
{
	Cpu		= CHECK_EEREC ? &recCpu : &intCpu;
	psxCpu	= CHECK_IOPREC ? &psxRec : &psxInt;

	Cpu->Reset();
	psxCpu->Reset();

	vuMicroCpuReset();
}

__forceinline void SysUpdate()
{
	HostGui::KeyEvent( PADkeyEvent() );
}

bool EmulationInProgress()
{
	return (g_EmuThread != NULL) && g_EmuThread->IsRunning();
}

// Executes the specified cdvd source and optional elf file.  This command performs a
// full closure of any existing VM state and starts a fresh VM with the requested
// sources.
void SysExecute( CoreEmuThread* newThread, CDVD_SourceType cdvdsrc )
{
	wxASSERT( newThread != NULL );
	safe_delete( g_EmuThread );

	CDVDsys_ChangeSource( cdvdsrc );
	g_EmuThread = newThread;
	g_EmuThread->Resume();
}

// Executes the emulator using a saved/existing virtual machine state and currently
// configured CDVD source device.
// Debug assertions:
void SysExecute( CoreEmuThread* newThread )
{
	wxASSERT( newThread != NULL );
	safe_delete( g_EmuThread );

	g_EmuThread = newThread;
	g_EmuThread->Resume();
}

// Once execution has been ended no action can be taken on the Virtual Machine (such as
// saving states).  No assertions or exceptions.
void SysEndExecution()
{
	if( EmuConfig.closeGSonEsc )
		StateRecovery::MakeGsOnly();

	safe_delete( g_EmuThread );
}

void SysSuspend()
{
	if( g_EmuThread != NULL )
		g_EmuThread->Suspend();
}

void SysResume()
{
	if( g_EmuThread != NULL )
		g_EmuThread->Resume();
}


// Function provided to escape the emulation state, by shutting down plugins and saving
// the GS state.  The execution state is effectively preserved, and can be resumed with a
// call to SysExecute.
/*void SysEndExecution()
{
	if( EmuConfig.closeGSonEsc )
		StateRecovery::MakeGsOnly();

	ClosePlugins( EmuConfig.closeGSonEsc );
}*/

void SysRestorableReset()
{
	if( !EmulationInProgress() ) return;
	StateRecovery::MakeFull();
}

// The calling function should trap and handle exceptions as needed.
// Exceptions:
//   Exception::StateLoadError - thrown when a fully recoverable exception ocurred.  The
//   virtual machine memory state is fully intact.
//
//   Any other exception means the Virtual Memory state is indeterminate and probably
//   invalid.
void SysLoadState( const wxString& file )
{
	// we perform a full backup to memory first so that we can restore later if the
	// load fails.  fixme: should this be made optional?  It could have significant
	// speed impact on state loads on slower machines with low ram. >_<
	StateRecovery::MakeFull();

	gzLoadingState joe( file );		// this'll throw an StateLoadError.

	GetPluginManager().Open();
	cpuReset();
	SysClearExecutionCache();

	joe.FreezeAll();

	if( GSsetGameCRC != NULL )
		GSsetGameCRC(ElfCRC, g_ZeroGSOptions);
}

void SysReset()
{
	Console::Status( _("Resetting...") );

	safe_delete( g_EmuThread );
	GetPluginManager().Shutdown();
	ElfCRC = 0;

	// Note : No need to call cpuReset() here.  It gets called automatically before the
	// emulator resumes execution.
}

// Maps a block of memory for use as a recompiled code buffer, and ensures that the
// allocation is below a certain memory address (specified in "bounds" parameter).
// The allocated block has code execution privileges.
// Returns NULL on allocation failure.
u8 *SysMmapEx(uptr base, u32 size, uptr bounds, const char *caller)
{
	u8 *Mem = (u8*)HostSys::Mmap( base, size );

	if( (Mem == NULL) || (bounds != 0 && (((uptr)Mem + size) > bounds)) )
	{
		DevCon::Notice( "First try failed allocating %s at address 0x%x", params caller, base );

		// memory allocation *must* have the top bit clear, so let's try again
		// with NULL (let the OS pick something for us).

		SafeSysMunmap( Mem, size );

		Mem = (u8*)HostSys::Mmap( NULL, size );
		if( bounds != 0 && (((uptr)Mem + size) > bounds) )
		{
			DevCon::Error( "Fatal Error:\n\tSecond try failed allocating %s, block ptr 0x%x does not meet required criteria.", params caller, Mem );
			SafeSysMunmap( Mem, size );

			// returns NULL, caller should throw an exception.
		}
	}
	return Mem;
}

// Ensures existence of necessary folders, and performs error handling if the
// folders fail to create.
static void InitFolderStructure()
{

}

// Returns FALSE if the core/recompiler memory allocations failed.
bool SysInit()
{
	PCSX2_MEM_PROTECT_BEGIN();
	SysDetect();
	if( !SysAllocateMem() )
		return false;	// critical memory allocation failure;

	SysAllocateDynarecs();
	PCSX2_MEM_PROTECT_END();

	return true;
}