forked from dolphin-emu/dolphin
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ProcessorInterface.cpp
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ProcessorInterface.cpp
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// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <cstdio>
#include <memory>
#include "Common/ChunkFile.h"
#include "Common/CommonTypes.h"
#include "Core/Core.h"
#include "Core/CoreTiming.h"
#include "Core/HW/MMIO.h"
#include "Core/HW/ProcessorInterface.h"
#include "Core/HW/SystemTimers.h"
#include "Core/IOS/IOS.h"
#include "Core/IOS/STM/STM.h"
#include "Core/PowerPC/PowerPC.h"
namespace ProcessorInterface
{
// STATE_TO_SAVE
u32 m_InterruptCause;
u32 m_InterruptMask;
// addresses for CPU fifo accesses
u32 Fifo_CPUBase;
u32 Fifo_CPUEnd;
u32 Fifo_CPUWritePointer;
static u32 m_Fifo_Reset;
static u32 m_ResetCode;
static u32 m_FlipperRev;
static u32 m_Unknown;
// ID and callback for scheduling reset button presses/releases
static CoreTiming::EventType* toggleResetButton;
static void ToggleResetButtonCallback(u64 userdata, s64 cyclesLate);
static CoreTiming::EventType* iosNotifyResetButton;
static void IOSNotifyResetButtonCallback(u64 userdata, s64 cyclesLate);
static CoreTiming::EventType* iosNotifyPowerButton;
static void IOSNotifyPowerButtonCallback(u64 userdata, s64 cyclesLate);
// Let the PPC know that an external exception is set/cleared
void UpdateException();
void DoState(PointerWrap& p)
{
p.Do(m_InterruptMask);
p.Do(m_InterruptCause);
p.Do(Fifo_CPUBase);
p.Do(Fifo_CPUEnd);
p.Do(Fifo_CPUWritePointer);
p.Do(m_Fifo_Reset);
p.Do(m_ResetCode);
p.Do(m_FlipperRev);
p.Do(m_Unknown);
}
void Init()
{
m_InterruptMask = 0;
m_InterruptCause = 0;
Fifo_CPUBase = 0;
Fifo_CPUEnd = 0;
Fifo_CPUWritePointer = 0;
/*
Previous Flipper IDs:
0x046500B0 = A
0x146500B1 = B
*/
m_FlipperRev = 0x246500B1; // revision C
m_Unknown = 0;
m_ResetCode = 0; // Cold reset
m_InterruptCause = INT_CAUSE_RST_BUTTON | INT_CAUSE_VI;
toggleResetButton = CoreTiming::RegisterEvent("ToggleResetButton", ToggleResetButtonCallback);
iosNotifyResetButton =
CoreTiming::RegisterEvent("IOSNotifyResetButton", IOSNotifyResetButtonCallback);
iosNotifyPowerButton =
CoreTiming::RegisterEvent("IOSNotifyPowerButton", IOSNotifyPowerButtonCallback);
}
void RegisterMMIO(MMIO::Mapping* mmio, u32 base)
{
mmio->Register(base | PI_INTERRUPT_CAUSE, MMIO::DirectRead<u32>(&m_InterruptCause),
MMIO::ComplexWrite<u32>([](u32, u32 val) {
m_InterruptCause &= ~val;
UpdateException();
}));
mmio->Register(base | PI_INTERRUPT_MASK, MMIO::DirectRead<u32>(&m_InterruptMask),
MMIO::ComplexWrite<u32>([](u32, u32 val) {
m_InterruptMask = val;
UpdateException();
}));
mmio->Register(base | PI_FIFO_BASE, MMIO::DirectRead<u32>(&Fifo_CPUBase),
MMIO::DirectWrite<u32>(&Fifo_CPUBase, 0xFFFFFFE0));
mmio->Register(base | PI_FIFO_END, MMIO::DirectRead<u32>(&Fifo_CPUEnd),
MMIO::DirectWrite<u32>(&Fifo_CPUEnd, 0xFFFFFFE0));
mmio->Register(base | PI_FIFO_WPTR, MMIO::DirectRead<u32>(&Fifo_CPUWritePointer),
MMIO::DirectWrite<u32>(&Fifo_CPUWritePointer, 0xFFFFFFE0));
mmio->Register(base | PI_FIFO_RESET, MMIO::InvalidRead<u32>(),
MMIO::ComplexWrite<u32>(
[](u32, u32 val) { WARN_LOG(PROCESSORINTERFACE, "Fifo reset (%08x)", val); }));
mmio->Register(base | PI_RESET_CODE, MMIO::DirectRead<u32>(&m_ResetCode),
MMIO::DirectWrite<u32>(&m_ResetCode));
mmio->Register(base | PI_FLIPPER_REV, MMIO::DirectRead<u32>(&m_FlipperRev),
MMIO::InvalidWrite<u32>());
// 16 bit reads are based on 32 bit reads.
for (int i = 0; i < 0x1000; i += 4)
{
mmio->Register(base | i, MMIO::ReadToLarger<u16>(mmio, base | i, 16),
MMIO::InvalidWrite<u16>());
mmio->Register(base | (i + 2), MMIO::ReadToLarger<u16>(mmio, base | i, 0),
MMIO::InvalidWrite<u16>());
}
}
void UpdateException()
{
if ((m_InterruptCause & m_InterruptMask) != 0)
PowerPC::ppcState.Exceptions |= EXCEPTION_EXTERNAL_INT;
else
PowerPC::ppcState.Exceptions &= ~EXCEPTION_EXTERNAL_INT;
}
static const char* Debug_GetInterruptName(u32 _causemask)
{
switch (_causemask)
{
case INT_CAUSE_PI:
return "INT_CAUSE_PI";
case INT_CAUSE_DI:
return "INT_CAUSE_DI";
case INT_CAUSE_RSW:
return "INT_CAUSE_RSW";
case INT_CAUSE_SI:
return "INT_CAUSE_SI";
case INT_CAUSE_EXI:
return "INT_CAUSE_EXI";
case INT_CAUSE_AI:
return "INT_CAUSE_AI";
case INT_CAUSE_DSP:
return "INT_CAUSE_DSP";
case INT_CAUSE_MEMORY:
return "INT_CAUSE_MEMORY";
case INT_CAUSE_VI:
return "INT_CAUSE_VI";
case INT_CAUSE_PE_TOKEN:
return "INT_CAUSE_PE_TOKEN";
case INT_CAUSE_PE_FINISH:
return "INT_CAUSE_PE_FINISH";
case INT_CAUSE_CP:
return "INT_CAUSE_CP";
case INT_CAUSE_DEBUG:
return "INT_CAUSE_DEBUG";
case INT_CAUSE_WII_IPC:
return "INT_CAUSE_WII_IPC";
case INT_CAUSE_HSP:
return "INT_CAUSE_HSP";
case INT_CAUSE_RST_BUTTON:
return "INT_CAUSE_RST_BUTTON";
default:
return "!!! ERROR-unknown Interrupt !!!";
}
}
void SetInterrupt(u32 _causemask, bool _bSet)
{
_dbg_assert_msg_(POWERPC, Core::IsCPUThread(), "SetInterrupt from wrong thread");
if (_bSet && !(m_InterruptCause & _causemask))
{
DEBUG_LOG(PROCESSORINTERFACE, "Setting Interrupt %s (set)", Debug_GetInterruptName(_causemask));
}
if (!_bSet && (m_InterruptCause & _causemask))
{
DEBUG_LOG(PROCESSORINTERFACE, "Setting Interrupt %s (clear)",
Debug_GetInterruptName(_causemask));
}
if (_bSet)
m_InterruptCause |= _causemask;
else
m_InterruptCause &= ~_causemask; // is there any reason to have this possibility?
// F|RES: i think the hw devices reset the interrupt in the PI to 0
// if the interrupt cause is eliminated. that isn't done by software (afaik)
UpdateException();
}
static void SetResetButton(bool _bSet)
{
SetInterrupt(INT_CAUSE_RST_BUTTON, !_bSet);
}
static void ToggleResetButtonCallback(u64 userdata, s64 cyclesLate)
{
SetResetButton(!!userdata);
}
static void IOSNotifyResetButtonCallback(u64 userdata, s64 cyclesLate)
{
const auto ios = IOS::HLE::GetIOS();
if (!ios)
return;
auto stm = ios->GetDeviceByName("/dev/stm/eventhook");
if (stm)
std::static_pointer_cast<IOS::HLE::Device::STMEventHook>(stm)->ResetButton();
}
static void IOSNotifyPowerButtonCallback(u64 userdata, s64 cyclesLate)
{
const auto ios = IOS::HLE::GetIOS();
if (!ios)
return;
auto stm = ios->GetDeviceByName("/dev/stm/eventhook");
if (stm)
std::static_pointer_cast<IOS::HLE::Device::STMEventHook>(stm)->PowerButton();
}
void ResetButton_Tap()
{
if (!Core::IsRunning())
return;
CoreTiming::ScheduleEvent(0, toggleResetButton, true, CoreTiming::FromThread::ANY);
CoreTiming::ScheduleEvent(0, iosNotifyResetButton, 0, CoreTiming::FromThread::ANY);
CoreTiming::ScheduleEvent(SystemTimers::GetTicksPerSecond() / 2, toggleResetButton, false,
CoreTiming::FromThread::ANY);
}
void PowerButton_Tap()
{
if (!Core::IsRunning())
return;
CoreTiming::ScheduleEvent(0, iosNotifyPowerButton, 0, CoreTiming::FromThread::ANY);
}
} // namespace ProcessorInterface