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emulator.c
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emulator.c
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/*
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
This file boots the n64 and starts the emulation thread.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
*/
/*
* 1964 Copyright (C) 1999-2002 Joel Middendorf, <[email protected]> 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.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. To contact the
* authors: email: [email protected], [email protected]
*/
#include <windows.h>
#include <process.h>
#include "globals.h"
#include "debug_option.h"
#include "emulator.h"
#include "interrupt.h"
#include "r4300i.h"
#include "n64rcp.h"
#include "dma.h"
#include "timer.h"
#include "memory.h"
#include "cheatcode.h"
#include "1964ini.h"
#include "compiler.h"
#include "win32/DLL_Video.h"
#include "win32/DLL_Audio.h"
#include "win32/DLL_Input.h"
#include "win32/DLL_Rsp.h"
#include "win32/windebug.h"
#include "win32/wingui.h"
#include "dynarec/dynaLog.h"
#include "dynarec/dynarec.h"
#include "romlist.h"
#ifdef DEBUG_COMMON
#include "win32/windebug.h"
extern char *DebugPrintInstruction(uint32 instruction);
extern char *Get_Interrupt_Name(void);
#endif
extern char *DebugPrintInstructionWithOutRefresh(uint32 Instruction);
extern char *DebugPrintInstr(uint32 Instruction);
extern uint32 SetException_Interrupt(uint32 pc);
extern void rc_Intr_Common(void);
void RunTheInterpreter(void);
void RunTheRegCacheWithoutOpcodeDebugger(void);
void RunTheRegCacheWithOpcodeDebugger(void);
void RunTheRegCacheNoCheck(void);
HANDLE CPUThreadHandle = NULL;
LONG Audio_Thread_Keep_Running = FALSE;
struct EmuStatus emustatus;
struct EmuOptions emuoptions;
uint32 CPUdelayPC; /* the saved Program Counter at CPU load/branch delay mode */
uint32 CPUdelay; /* Describer if the CPU is in load/branch delay mode */
HardwareState gHardwareState, *p_gHardwareState;
MemoryState gMemoryState, *p_gMemoryState;
uint32 *g_LookupPtr; /* This global will be set at returning from a block */
uint32 g_pc_is_rdram; /* This global will be set at returning from a block */
BOOL IsBooting = FALSE;
BOOL NeedToApplyRomWriteHack = FALSE;
void (__cdecl StartCPUThread) (void *pVoid);
//This only mutes when paused.
void __cdecl MuteTest(void* dummy)
{
int k;
//This is enough times to cleanup the azi audio
//and enough times to keep jabo directsound 1.5
//from crashing. This is a shortcoming of the spec.
for (k=0;k<10;k++)
{
AUDIO_AiUpdate(TRUE);
}
AUDIO_AiUpdate(FALSE);
_endthread();
}
void Mute()
{
AUDIO_AiUpdate(FALSE);
_beginthread(MuteTest, 0, NULL);
}
/*
=======================================================================================================================
Called by GUI thread to start emulating £
=======================================================================================================================
*/
void RunEmulator(uint32 core)
{
if(!Rom_Loaded)
{
return;
}
emustatus.Emu_Keep_Running = TRUE;
Audio_Thread_Keep_Running = TRUE;
AUDIO_Initialize(Audio_Info);
emustatus.cpucore = core;
#ifndef CRASHABLE
__try {
#endif
CPUThreadHandle = (HANDLE) _beginthread(StartCPUThread, 0, NULL);
#ifndef CRASHABLE
}__except(NULL, EXCEPTION_EXECUTE_HANDLER)
{
DisplayError("Emulation stopped. Please restart 1964.exe");
emustatus.reason_to_stop = CPUCRASH; /* Quit like VIDEO plugin crash */
}
#endif
}
/*
=======================================================================================================================
Called by GUI thread to pause emulating £
=======================================================================================================================
*/
BOOL PauseEmulator(void)
{
if(emustatus.Emu_Is_Paused) return TRUE;
if(emustatus.exception_entry_count) /* || ITLB_Error || (gHWS_COP0Reg[STATUS] & EXL) ) */
{
/*~~*/
int i;
/*~~*/
for(i = 0; i < 100; i++)
{
Sleep(1);
if(emustatus.exception_entry_count) /* || ITLB_Error || (gHWS_COP0Reg[STATUS] & EXL) ) */
continue;
else
goto step2;
}
return FALSE;
}
step2:
emustatus.reason_to_stop = EMUPAUSE;
emustatus.Emu_Keep_Running = FALSE;
CPU_Task_To_String(generalmessage);
TRACE1("Try to pause, CPU is busy doing: %s", generalmessage);
while(!emustatus.Emu_Is_Paused && emustatus.Emu_Is_Running)
{
/*~~~~*/
MSG msg;
/*~~~~*/
if(PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE))
{
if(PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE))
{
if(GetMessage(&msg, NULL, 0, 0))
{
if(!TranslateAccelerator(gui.hwnd1964main, gui.hAccTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
}
}
emustatus.Emu_Keep_Running = FALSE;
emustatus.reason_to_stop = EMUPAUSE;
Sleep(50);
}
sprintf(generalmessage, "%s - Paused", gui.szWindowTitle);
SetStatusBarText(0, generalmessage);
SetWindowText(gui.hwnd1964main, generalmessage);
Mute();
return TRUE;
}
/*
=======================================================================================================================
Called by GUI thread to resume emulating from pausing £
the global variable "needinit" is to pass information to the CPU thread £
to do InitEmu() in CPU thread. Reason behind this is that OpenGL is thread-safe, £
initialization must be done in the CPU thread £
=======================================================================================================================
*/
void ResumeEmulator(int action_after_pause)
{
if(!emustatus.Emu_Is_Paused) return;
emustatus.action_after_resume = action_after_pause;
/* Apply the hack codes */
if(emuoptions.auto_apply_cheat_code)
{
CodeList_ApplyAllCode(INGAME);
#ifdef CHEATCODE_LOCK_MEMORY
InitCheatCodeEngineMemoryLock();
#endif
}
emustatus.Emu_Keep_Running = TRUE;
sprintf(generalmessage, "%s - Running", gui.szWindowTitle);
SetStatusBarText(0, generalmessage);
SetWindowText(gui.hwnd1964main, generalmessage);
CheckButton(ID_BUTTON_PLAY, TRUE);
CheckButton(ID_BUTTON_PAUSE, FALSE);
QueryPerformanceCounter(&LastSecondTime);
}
/*
=======================================================================================================================
Called by GUI thread to stop emulating £
=======================================================================================================================
*/
void StopEmulator(void)
{
emustatus.Emu_Keep_Running = FALSE;
emustatus.reason_to_stop = EMUSTOP;
CPU_Task_To_String(generalmessage);
TRACE1("Try to pause, CPU is busy doing: %s", generalmessage);
while(emustatus.Emu_Is_Running)
{
/*~~~~*/
MSG msg;
/*~~~~*/
if(PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE))
{
if(PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE))
{
if(GetMessage(&msg, NULL, 0, 0))
{
if(!TranslateAccelerator(gui.hwnd1964main, gui.hAccTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
}
}
emustatus.Emu_Keep_Running = FALSE;
emustatus.reason_to_stop = EMUSTOP;
Sleep(50);
}
if (!emustatus.Emu_Is_Resetting)
{
VIDEO_RomClosed();
AUDIO_RomClosed();
CONTROLLER_RomClosed();
if( emuoptions.UsingRspPlugin )
{
RSPRomClosed();
}
}
}
/*
=======================================================================================================================
Called by GUI thread to switch CPU core while emulating £
=======================================================================================================================
*/
void EmulatorSetCore(int core)
{
if(emustatus.Emu_Is_Running)
{
if(emustatus.cpucore != core)
{
if(PauseEmulator())
{
TRACE2("Switch CPU Core to %s, PC=%08X", emulator_type_names[core], gHWS_pc);
emustatus.cpucore = core;
ResumeEmulator(REFRESH_DYNA_AFTER_PAUSE);
}
}
}
else /* Emulator is not running, then change default CPU core */
{
defaultoptions.Emulator = core;
}
SetStatusBarText(4, core == DYNACOMPILER ? "D" : "I");
}
/*
* All functions above are called by GUI £
* All functions below are used in the CPU thread £
* £
*/
uint32 RDRamSizeHackSavedDWord1 = 0;
uint32 RDRamSizeHackSavedDWord2 = 0;
/*
=======================================================================================================================
=======================================================================================================================
*/
void CloseEmulator(void)
{
Audio_Thread_Keep_Running = FALSE; /* this will quit the Audio thread */
if(currentromoptions.Code_Check == CODE_CHECK_PROTECT_MEMORY) UnprotectAllBlocks();
if(emustatus.reason_to_stop == VIDEOCRASH || emustatus.reason_to_stop == CPUCRASH)
{
PostMessage(gui.hwnd1964main, WM_COMMAND, ID_ROM_STOP, 0);
emustatus.Emu_Keep_Running = TRUE;
while(emustatus.Emu_Keep_Running)
{
Sleep(50); /* wait until wingui processing the STOP command */
}
}
emustatus.Emu_Is_Running = FALSE;
emustatus.game_hack = GHACK_NONE;
Free_Dynarec();
*(uint32 *) &gMS_RDRAM[rominfo.RDRam_Size_Hack] = RDRamSizeHackSavedDWord1;
*(uint32 *) &gMS_RDRAM[0x2FE1C0] = RDRamSizeHackSavedDWord2;
}
/*
=======================================================================================================================
£
=======================================================================================================================
*/
void RefreshDynaDuringGamePlay(void)
{
Init_Dynarec();
Set_Translate_PC();
}
/*
=======================================================================================================================
=======================================================================================================================
*/
extern BOOL write_to_rom_flag;
void InitEmu(void)
{
if(GetVersion() < 0x80000000) /* Windows NT */
SetThreadPriority(CPUThreadHandle, THREAD_PRIORITY_NORMAL);
else
SetThreadPriority(CPUThreadHandle, THREAD_PRIORITY_HIGHEST);
FR_reg_offset = (gHWS_COP0Reg[STATUS] & 0x04000000) ? 32 : 1;
CPUdelay = 0;
CPUdelayPC = 0;
CPUNeedToDoOtherTask = FALSE;
CPUNeedToCheckInterrupt = FALSE;
emustatus.Emu_Is_Paused = FALSE;
emustatus.gepd_pause = 0;
write_to_rom_flag = FALSE;
emustatus.exception_entry_count = 0;
emustatus.action_after_resume = DO_NOTHING_AFTER_PAUSE;
compilerstatus.lCodePosition = 0;
Block = 0;
FPU_Is_Enabled = FALSE;
compilerstatus.Is_Compiling = 0;
vips = vips_speed_limits[currentromoptions.Max_FPS];
framecounter = 0;
viCountePerSecond = 0;
vi_field_number = 0;
QueryPerformanceCounter(&LastVITime);
QueryPerformanceCounter(&LastSecondTime);
Init_Count_Down_Counters();
memcpy(&HeaderDllPass[0], &gMS_ROM_Image[0], 0x40);
if (!emustatus.Emu_Is_Resetting)
{
VIDEO_RomOpen();
CONTROLLER_RomOpen();
}
else
emustatus.Emu_Is_Resetting = 0;
RefreshDynaDuringGamePlay();
}
/*
=======================================================================================================================
This function is called at the beginning of emulating, runs until boot successfully £
=======================================================================================================================
*/
void N64_Boot(void)
{
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
int RDRam_Hacked = 0;
uint32 bootaddr = (*(uint32 *) (gMS_ROM_Image + 8) & 0x007FFFFF) + 0x80000000;
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
emustatus.Emu_Is_Running = TRUE;
IsBooting = TRUE;
NeedToApplyRomWriteHack = FALSE;
if( strnicmp(currentromoptions.Game_Name, "A Bug's Life", 12) == 0 ||
strnicmp(currentromoptions.Game_Name, "Toy Story 2", 11) == 0 )
{
NeedToApplyRomWriteHack = TRUE;
TRACE0("Using Rom Write Hack");
}
while
(
(emustatus.Emu_Keep_Running && gHWS_pc != bootaddr && (gHWS_pc & 0x00FFFFFF) < 0x2000)
|| ((uint32) (*Dyna_Check_Codes) == (uint32) Dyna_Code_Check_None_Boot)
)
{
if(emustatus.cpucore == INTERPRETER)
{
InterpreterStepCPU();
}
else
RunDynaBlock();
if(RDRam_Hacked == 0)
{
if
(
(currentromoptions.DMA_Segmentation == USEDMASEG_YES && DMAInProgress)
|| (emuoptions.dma_in_segments == FALSE && (MI_INTR_REG_R & MI_INTR_PI))
)
{
RDRam_Hacked = 1;
RDRamSizeHackSavedDWord1 = *(uint32 *) &gMS_RDRAM[rominfo.RDRam_Size_Hack];
OPCODE_DEBUGGER_EPILOGUE(*(uint32 *) &gMS_RDRAM[rominfo.RDRam_Size_Hack] = current_rdram_size;) RDRamSizeHackSavedDWord2 = *(uint32 *) &gMS_RDRAM[0x2FE1C0];
/*
* Azimer - DK64 Hack to break out of infinite loop £
* I believe this memory location is some sort of copyright protection which £
* is written to using the RSP on bootup. The only issue I see is if it £
* affects any other roms?
*/
if(strncmp(currentromoptions.Game_Name, "DONKEY KONG 64", 14) == 0)
/*
* if( currentromoptions.crc1 == 0xEC58EABF && currentromoptions.crc2 ==
* 0xAD7C7169 ) //DK64
*/
{
OPCODE_DEBUGGER_EPILOGUE(*(uint32 *) &gMS_RDRAM[0x2FE1C0] = 0xAD170014;)
}
}
}
}
if(emuoptions.auto_apply_cheat_code)
{
CodeList_ApplyAllCode(BOOTUPONCE);
CodeList_ApplyAllCode(INGAME);
#ifdef CHEATCODE_LOCK_MEMORY
InitCheatCodeEngineMemoryLock();
#endif
}
emustatus.Emu_Is_Running = FALSE;
IsBooting = FALSE;
if(gHWS_pc == bootaddr)
{
TRACE1("N64 boot successfully, start run from %08X", bootaddr)
}
else
{
TRACE1("N64 boot failed, start run from %08X", gHWS_pc)
}
}
void __cdecl LogDyna(char *debug, ...);
/*
* This is the entry point for CPU emulating thread £
*/
void (__cdecl StartCPUThread) (void *pVoid)
{
TRACE0("");
TRACE0("");
TRACE0("");
TRACE1("Starting ROM %s", rominfo.name)
TRACE0("");
TRACE0("");
TRACE0("");
p_gHardwareState = (HardwareState *) &gHardwareState;
p_gMemoryState = (MemoryState *) &gMemoryState;
InitEmu();
N64_Boot();
if(mouseinjectorpresent)
CONTROLLER_HookROM((DWORD *)gMemoryState.ROM_Image); // hot patch rom here
emustatus.reason_to_stop = EMURUNNING;
DO_PROFILIER_R4300I
{
START_CPU_THREAD:
emustatus.Emu_Is_Running = TRUE;
switch(emustatus.cpucore)
{
case INTERPRETER:
TRACE0("Start Interpreter");
RunTheInterpreter();
break;
case DYNACOMPILER:
#ifndef TEST_OPCODE_DEBUGGER_INTEGRITY4
if(debug_opcode != 0)
{
TRACE0("Start RunTheRegCacheWithOpcodeDebugger");
RunTheRegCacheWithOpcodeDebugger();
}
else
#endif
if((uint32) (*Dyna_Check_Codes) == (uint32) Dyna_Code_Check_None)
{
TRACE0("Start RunTheRegCacheNoCheck");
RunTheRegCacheNoCheck();
}
else
{
TRACE0("Start RunTheRegCacheWithoutOpcodeDebugger");
RunTheRegCacheWithoutOpcodeDebugger();
}
break;
}
if(emustatus.reason_to_stop == EMUPAUSE)
{
/*
* If user is saving state after pausing, need to update the COUNT register here £
* so we can return back to the original timer value £
* This make Donkey Kong can be saved state
*/
gHWS_COP0Reg[COUNT] = Get_COUNT_Register();
PauseEmulating();
goto START_CPU_THREAD;
}
}
stop_profiling();
CloseEmulator();
_endthreadex(0);
}
/*
=======================================================================================================================
Use in CPU thread, will pausing emu and wait for resume £
=======================================================================================================================
*/
void PauseEmulating(void)
{
emustatus.Emu_Is_Paused = TRUE;
while(emustatus.Emu_Keep_Running == FALSE && emustatus.reason_to_stop == EMUPAUSE)
{
emustatus.Emu_Is_Paused = TRUE;
Sleep(200);
/*
* VIDEO_UpdateScreen(); £
* VIDEO_DrawScreen();
*/
}
emustatus.Emu_Is_Paused = FALSE;
if(emustatus.Emu_Keep_Running)
{
Free_Dynarec();
if(emustatus.action_after_resume == INIT_EMU_AFTER_PAUSE)
InitEmu();
else if(emustatus.action_after_resume == REFRESH_DYNA_AFTER_PAUSE)
RefreshDynaDuringGamePlay();
/* else //do nothing */
}
}
/*
=======================================================================================================================
This is a main loop for emulating in interpreter £
=======================================================================================================================
*/
void RunTheInterpreter(void)
{
/*~~~~~~~~~~~~~~~~~~~~~~~~*/
register uint32 Instruction;
/*~~~~~~~~~~~~~~~~~~~~~~~~*/
_DoOtherTask:
Instruction = FetchInstruction(); /* Fetch instruction at PC */
CPU_instruction[_OPCODE_](Instruction);
gHWS_GPR[0] = 0;
INTERPRETER_DEBUG_INSTRUCTION(Instruction);
if(CPUNeedToCheckException)
{
gHWS_pc = SetException_Interrupt(gHWS_pc);
TRACE3
(
"Start Exception %d, EPC=%08X, PC=%08X",
(gHWS_COP0Reg[CAUSE] & EXCCODE) >> 2,
gHWS_COP0Reg[EPC],
gHWS_pc
) CPUNeedToCheckException = FALSE;
}
else
{
switch(CPUdelay)
{
case 0: gHWS_pc += 4; break;
case 1: gHWS_pc += 4; CPUdelay = 2; break;
default: gHWS_pc = CPUdelayPC; CPUdelay = 0; if(!emustatus.Emu_Keep_Running) goto out; break;
}
if(countdown_counter <= 0) Trigger_Timer_Event();
}
countdown_counter -= VICounterFactors[CounterFactor];
goto _DoOtherTask;
out:
if(Is_CPU_Doing_Other_Tasks() || CPUdelay != 0) goto _DoOtherTask;
}
/*
* This is a main loop for emulating in Dynarec £
*/
uint32 HardwareStart = (uint32) & gHardwareState + 128;
/*
=======================================================================================================================
=======================================================================================================================
*/
void RunTheRegCacheWithoutOpcodeDebugger(void)
{
/*
* __asm pushad // nono. This causes stack overflow in Minimize size compiler
* option.
*/
__asm mov ebp, HardwareStart
while(emustatus.Emu_Keep_Running)
{
_DoOtherTask:
Block = (uint8 *) *g_LookupPtr;
if(Block != NULL && g_pc_is_rdram)
Dyna_Check_Codes();
if(Block == NULL)
{
Dyna_Compile_Block();
}
/* Run the compiled code in the Block */
DEBUG_PRINT_DYNA_EXECUTION_INFO;
__asm call Block;
if(countdown_counter > 0)
goto _DoOtherTask;
Trigger_Timer_Event();
}
if( emustatus.reason_to_stop != EMUSTOP && Is_CPU_Doing_Other_Tasks() )
goto _DoOtherTask;
/* __asm popad //nono. */
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void RunTheRegCacheWithOpcodeDebugger(void)
{
/*
* __asm pushad // nono. This causes stack overflow in Minimize size compiler
* option.
*/
__asm mov ebp, HardwareStart
while(emustatus.Emu_Keep_Running)
{
_NextBlock:
__asm
{
mov eax, g_LookupPtr
mov eax, [eax]
mov Block, eax
cmp eax, 0
je l2
mov eax, g_pc_is_rdram
cmp eax, 0
je l3
call Dyna_Check_Codes
mov eax, Block
cmp eax, 0
jnz l3
l2 : call Dyna_Compile_Block
l3 :
}
BlockStartPC = gHardwareState.pc;
/* Run the compiled code in the Block */
DEBUG_PRINT_DYNA_EXECUTION_INFO;
__asm call Block
if(debug_opcode!=0)
{
if(CPUdelay == 1) gHardwareState_Interpreter_Compare.pc += 4;
if(gHardwareState.pc != CPUdelayPC && CPUdelay != 0)
{
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
uint32 Inst;
uint32 savedpc = gHardwareState.pc;
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
gHardwareState.pc = gHardwareState_Interpreter_Compare.pc;
Inst = FetchInstruction();
sprintf
(
generalmessage,
"Compare Target PC error: pc=%08X, DelayPC=%08X, Before Jump PC=%08X\nDyna:%s\nInterpreter:",
savedpc,
CPUdelayPC,
gHardwareState_Interpreter_Compare.pc,
DebugPrintInstr(Inst)
);
gHardwareState.pc = savedpc;
COMPARE_SwitchToInterpretive();
strcat(generalmessage, DebugPrintInstr(Inst));
TRACE0(generalmessage);
DisplayError(generalmessage);
COMPARE_SwitchToDynarec();
}
CPUdelay = 0;
PcBeforeBranch = gHardwareState_Interpreter_Compare.pc;
gHardwareState_Interpreter_Compare.pc = gHardwareState.pc;
}
if(countdown_counter > 0)
goto _NextBlock;
Trigger_Timer_Event();
}
if( emustatus.reason_to_stop != EMUSTOP && Is_CPU_Doing_Other_Tasks() )
goto _NextBlock;
/* __asm popad //nono. */
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void RunTheRegCacheNoCheck(void)
{
__asm mov ebp, HardwareStart
while(emustatus.Emu_Keep_Running)
{
_NextBlock:
__asm
{
l1: mov eax, g_LookupPtr
mov eax, [eax]
test eax, eax
je l2
call eax
cmp countdown_counter, 0
jg l1
jmp l3
l2 : call Dyna_Compile_Block
call eax
cmp countdown_counter, 0
jg l1
l3 :
}
Trigger_Timer_Event();
}
if( emustatus.reason_to_stop != EMUSTOP && Is_CPU_Doing_Other_Tasks() )
goto _NextBlock;
}
/*
=======================================================================================================================
Check and execute all other tasks, called by emulating main loop £
Will do DMA, interrupt checking and so on. £
=======================================================================================================================
*/
void CPU_Check_Interrupts(void)
{
// CPUNeedToCheckInterrupt = FALSE; /* We will not check the second time, only one time */
if(emustatus.cpucore == INTERPRETER) /* intepreter mode */
{
if
(
(gHWS_COP0Reg[STATUS] & EXL_OR_ERL /* 0x00000004 */ ) == 0 /* No in another interrupt routine */
&& (
(gHWS_COP0Reg[STATUS] & 0x00000001) != 0 /* Interrupts are enabled */
&& ((gHWS_COP0Reg[CAUSE] & gHWS_COP0Reg[STATUS] & 0x0000FF00) != 0)
)
)
{
gHWS_pc = SetException_Interrupt(gHWS_pc);
CPUNeedToCheckInterrupt = FALSE;
DEBUG_INTERRUPT_TRACE(TRACE1("Interrupt is being served, Interrupt=%s", Get_Interrupt_Name()));
}
}
else /* Dyna mode */
{
#ifndef TEST_OPCODE_DEBUGGER_INTEGRITY6
if(debug_opcode!=0)
{
COMPARE_SwitchToInterpretive();
if
(
(gHWS_COP0Reg[STATUS] & EXL_OR_ERL) == 0 /* No in another interrupt routine */
&& (
(gHWS_COP0Reg[STATUS] & 0x00000001) != 0 /* Interrupts are enabled */
&& ((gHWS_COP0Reg[CAUSE] & gHWS_COP0Reg[STATUS] & 0x0000FF00) != 0)
)
)
{
gHWS_COP0Reg[EPC] = gHWS_pc;
gHWS_COP0Reg[STATUS] |= EXL; /* set EXL = 1 */
gHWS_pc = 0x80000180;
gHWS_COP0Reg[CAUSE] &= NOT_BD; /* clear BD */
DEBUG_INTERRUPT_TRACE(TRACE1("Interrupt is being served, Interrupt=%s", Get_Interrupt_Name()));
}
COMPARE_SwitchToDynarec();
if
(
(gHWS_COP0Reg[STATUS] & EXL_OR_ERL) == 0 /* No in another interrupt routine */
&& (
(gHWS_COP0Reg[STATUS] & 0x00000001) != 0 /* Interrupts are enabled */
&& ((gHWS_COP0Reg[CAUSE] & gHWS_COP0Reg[STATUS] & 0x0000FF00) != 0)
)
)
{
DEBUG_INTERRUPT_TRACE(TRACE1("Interrupt is being served, Interrupt=%s", Get_Interrupt_Name()));
rc_Intr_Common();
Set_Translate_PC();
CPUNeedToCheckInterrupt = FALSE;
}
}
else
#endif
if
(
(gHWS_COP0Reg[STATUS] & EXL_OR_ERL) == 0 /* No in another interrupt routine */
&& (
(gHWS_COP0Reg[STATUS] & 0x00000001) != 0 /* Interrupts are enabled */
&& ((gHWS_COP0Reg[CAUSE] & gHWS_COP0Reg[STATUS] & 0x0000FF00) != 0)
)
)
{
DEBUG_INTERRUPT_TRACE(TRACE1("Interrupt is being served, Interrupt=%s", Get_Interrupt_Name()));
rc_Intr_Common();
Set_Translate_PC();
CPUNeedToCheckInterrupt = FALSE;
}
}
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void CPUDoOtherTasks(void)
{
CPUNeedToDoOtherTask = FALSE;
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void CPU_Task_To_String(char *str)
{
if(!CPUNeedToDoOtherTask)
{
strcpy(str, "Nothing");
return;
}
str[0] = '\0';
if(DMAInProgress || CPUNeedToCheckInterrupt)
{
if(DMAInProgress) strcat(str, " DMA");
if(CPUNeedToCheckInterrupt) strcat(str, " Interrupt");
}
else
CPUNeedToDoOtherTask = FALSE;
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void ClearCPUTasks(void)
{
CPUNeedToDoOtherTask = FALSE;
if(currentromoptions.DMA_Segmentation == USEDMASEG_YES)
{
DMAInProgress = FALSE;
PIDMAInProgress = NO_DMA_IN_PROGRESS;
SIDMAInProgress = NO_DMA_IN_PROGRESS;
SPDMAInProgress = NO_DMA_IN_PROGRESS;
}
CPUNeedToCheckInterrupt = FALSE;
}
/*
=======================================================================================================================
Step and run one opcode in interpreter mode £
=======================================================================================================================
*/
void InterpreterStepCPU(void)
{
/*~~~~~~~~~~~~~~~~*/
uint32 Instruction;
/*~~~~~~~~~~~~~~~~*/
Instruction = FetchInstruction();
CPU_instruction[_OPCODE_](Instruction);
INTERPRETER_DEBUG_INSTRUCTION(Instruction);
if(CPUNeedToCheckException)
{
gHWS_pc = SetException_Interrupt(gHWS_pc);
TRACE3
(
"Start Exception %d, EPC=%08X, PC=%08X",
(gHWS_COP0Reg[CAUSE] & EXCCODE) >> 2,
gHWS_COP0Reg[EPC],
gHWS_pc
) CPUNeedToCheckException = FALSE;
}
else
{
switch(CPUdelay)
{
case 0: gHWS_pc += 4; break;
case 1: gHWS_pc += 4; CPUdelay = 2; break;
default: gHWS_pc = CPUdelayPC; CPUdelay = 0; break;
}
}
gHWS_GPR[0] = 0;
countdown_counter -= VICounterFactors[CounterFactor];
if(countdown_counter <= 0) Trigger_Timer_Event();
if(Is_CPU_Doing_Other_Tasks()) CPUDoOtherTasks();
}
/*
=======================================================================================================================
Return the instruction at current PC £
This is a utility function, called by some debug function £
=======================================================================================================================
*/
uint32 FetchInstruction(void)
{
if(NOT_IN_KO_K1_SEG(gHWS_pc))
{
/*~~~~~~~~~~~~~~~~~~~~~~~~*/
register uint32 translatepc;
/*~~~~~~~~~~~~~~~~~~~~~~~~*/
ITLB_Error = FALSE;
translatepc = Direct_TLB_Lookup(gHWS_pc, TLB_INST);
if(ITLB_Error)