Make EXI use CoreTiming events like everything else instead of having its own slow special check.

Microphone is probably wrong/mistimed because it doesn't take into
account cycles late, but that's not a new issue here.

Source/Core/Core/HW/EXI.cpp

@@ -23,6 +23,10 @@ static int changeDevice;
 static int updateInterrupts;
 
 static CEXIChannel *g_Channels[MAX_EXI_CHANNELS];
+
+static void ChangeDeviceCallback(u64 userdata, int cyclesLate);
+static void UpdateInterruptsCallback(u64 userdata, int cycles_late);
+
 void Init()
 {
 	InitSRAM();
@@ -82,7 +86,7 @@ void RegisterMMIO(MMIO::Mapping* mmio, u32 base)
 	}
 }
 
-void ChangeDeviceCallback(u64 userdata, int cyclesLate)
+static void ChangeDeviceCallback(u64 userdata, int cyclesLate)
 {
 	u8 channel = (u8)(userdata >> 32);
 	u8 type = (u8)(userdata >> 16);
@@ -116,11 +120,6 @@ IEXIDevice* FindDevice(TEXIDevices device_type, int customIndex)
 }
 
 void UpdateInterrupts()
-{
-	CoreTiming::ScheduleEvent_Threadsafe(0, updateInterrupts, 0);
-}
-
-void UpdateInterruptsCallback(u64 userdata, int cyclesLate)
 {
 	// Interrupts are mapped a bit strangely:
 	// Channel 0 Device 0 generates interrupt on channel 0
@@ -135,4 +134,19 @@ void UpdateInterruptsCallback(u64 userdata, int cyclesLate)
 	ProcessorInterface::SetInterrupt(ProcessorInterface::INT_CAUSE_EXI, causeInt);
 }
 
+static void UpdateInterruptsCallback(u64 userdata, int cycles_late)
+{
+	UpdateInterrupts();
+}
+
+void ScheduleUpdateInterrupts_Threadsafe(int cycles_late)
+{
+	CoreTiming::ScheduleEvent_Threadsafe(cycles_late, updateInterrupts, 0);
+}
+
+void ScheduleUpdateInterrupts(int cycles_late)
+{
+	CoreTiming::ScheduleEvent(cycles_late, updateInterrupts, 0);
+}
+
 } // end of namespace ExpansionInterface

Source/Core/Core/HW/EXI.h

@@ -27,10 +27,10 @@ void PauseAndLock(bool doLock, bool unpauseOnUnlock);
 
 void RegisterMMIO(MMIO::Mapping* mmio, u32 base);
 
-void UpdateInterruptsCallback(u64 userdata, int cyclesLate);
 void UpdateInterrupts();
+void ScheduleUpdateInterrupts_Threadsafe(int cycles_late);
+void ScheduleUpdateInterrupts(int cycles_late);
 
-void ChangeDeviceCallback(u64 userdata, int cyclesLate);
 void ChangeDevice(const u8 channel, const TEXIDevices device_type, const u8 device_num);
 
 CEXIChannel* GetChannel(u32 index);

Source/Core/Core/HW/EXI_Channel.cpp

@@ -35,8 +35,6 @@ CEXIChannel::CEXIChannel(u32 ChannelId) :
 
 	for (auto& device : m_pDevices)
 		device.reset(EXIDevice_Create(EXIDEVICE_NONE, m_ChannelId));
-
-	updateInterrupts = CoreTiming::RegisterEvent("EXIInterrupt", UpdateInterrupts);
 }
 
 CEXIChannel::~CEXIChannel()
@@ -93,7 +91,7 @@ void CEXIChannel::RegisterMMIO(MMIO::Mapping* mmio, u32 base)
 			if (pDevice != nullptr)
 				pDevice->SetCS(m_Status.CHIP_SELECT);
 
-			CoreTiming::ScheduleEvent_Threadsafe_Immediate(updateInterrupts, 0);
+			ExpansionInterface::UpdateInterrupts();
 		})
 	);
 
@@ -156,7 +154,7 @@ void CEXIChannel::RegisterMMIO(MMIO::Mapping* mmio, u32 base)
 void CEXIChannel::SendTransferComplete()
 {
 	m_Status.TCINT = 1;
-	CoreTiming::ScheduleEvent_Threadsafe_Immediate(updateInterrupts, 0);
+	ExpansionInterface::UpdateInterrupts();
 }
 
 void CEXIChannel::RemoveDevices()
@@ -185,14 +183,9 @@ void CEXIChannel::AddDevice(IEXIDevice* pDevice, const int device_num, bool noti
 		if (m_ChannelId != 2)
 		{
 			m_Status.EXTINT = 1;
-			CoreTiming::ScheduleEvent_Threadsafe_Immediate(updateInterrupts, 0);
-		}
-	}
-}
-
-void CEXIChannel::UpdateInterrupts(u64 userdata, int cyclesLate)
-{
 			ExpansionInterface::UpdateInterrupts();
+		}
+	}
 }
 
 bool CEXIChannel::IsCausingInterrupt()

Source/Core/Core/HW/EXI_Channel.h

@@ -83,10 +83,6 @@ private:
 	// Since channels operate a bit differently from each other
 	u32 m_ChannelId;
 
-	int updateInterrupts;
-
-	static void UpdateInterrupts(u64 userdata, int cyclesLate);
-
 public:
 	// get device
 	IEXIDevice* GetDevice(const u8 _CHIP_SELECT);

Source/Core/Core/HW/EXI_DeviceAMBaseboard.cpp

@@ -4,6 +4,7 @@
 
 #include "Core/Core.h"
 
+#include "Core/HW/EXI.h"
 #include "Core/HW/EXI_Device.h"
 #include "Core/HW/EXI_DeviceAMBaseboard.h"
 
@@ -87,6 +88,7 @@ void CEXIAMBaseboard::TransferByte(u8& _byte)
 				m_have_irq = true;
 			else if (m_command[0] == 0x82)
 				m_have_irq = false;
+			ExpansionInterface::UpdateInterrupts();
 		}
 		else if (m_position > 4)
 		{

Source/Core/Core/HW/EXI_DeviceEthernet.cpp

@@ -4,6 +4,7 @@
 
 #include "Common/Network.h"
 #include "Core/ConfigManager.h"
+#include "Core/HW/EXI.h"
 #include "Core/HW/EXI_Device.h"
 #include "Core/HW/EXI_DeviceEthernet.h"
 #include "Core/HW/Memmap.h"
@@ -123,6 +124,7 @@ void CEXIETHERNET::ImmWrite(u32 data,  u32 size)
 			exi_status.interrupt_mask = data;
 			break;
 		}
+		ExpansionInterface::UpdateInterrupts();
 	}
 	else
 	{
@@ -401,6 +403,7 @@ void CEXIETHERNET::SendComplete()
 		mBbaMem[BBA_IR] |= INT_T;
 
 		exi_status.interrupt |= exi_status.TRANSFER;
+		ExpansionInterface::ScheduleUpdateInterrupts_Threadsafe(0);
 	}
 
 	mBbaMem[BBA_LTPS] = 0;
@@ -571,6 +574,7 @@ bool CEXIETHERNET::RecvHandlePacket()
 		mBbaMem[BBA_IR] |= INT_R;
 
 		exi_status.interrupt |= exi_status.TRANSFER;
+		ExpansionInterface::ScheduleUpdateInterrupts_Threadsafe(0);
 	}
 	else
 	{

Source/Core/Core/HW/EXI_DeviceMemoryCard.cpp

@@ -263,6 +263,7 @@ void CEXIMemoryCard::CmdDone()
 	status &= ~MC_STATUS_BUSY;
 
 	m_bInterruptSet = 1;
+	ExpansionInterface::UpdateInterrupts();
 }
 
 void CEXIMemoryCard::TransferComplete()

Source/Core/Core/HW/EXI_DeviceMic.cpp

@@ -7,6 +7,7 @@
 #if HAVE_PORTAUDIO
 
 #include "Core/CoreTiming.h"
+#include "Core/HW/EXI.h"
 #include "Core/HW/EXI_Device.h"
 #include "Core/HW/EXI_DeviceMic.h"
 #include "Core/HW/GCPad.h"
@@ -176,8 +177,9 @@ void CEXIMic::SetCS(int cs)
 
 void CEXIMic::UpdateNextInterruptTicks()
 {
-	next_int_ticks = CoreTiming::GetTicks() +
+	int diff = (SystemTimers::GetTicksPerSecond() / sample_rate) * buff_size_samples;
-		(SystemTimers::GetTicksPerSecond() / sample_rate) * buff_size_samples;
+	next_int_ticks = CoreTiming::GetTicks() + diff;
+	ExpansionInterface::ScheduleUpdateInterrupts(diff);
 }
 
 bool CEXIMic::IsInterruptSet()

Source/Core/Core/PowerPC/PowerPC.cpp

@@ -303,10 +303,6 @@ void UpdatePerformanceMonitor(u32 cycles, u32 num_load_stores, u32 num_fp_inst)
 
 void CheckExceptions()
 {
-	// Make sure we are checking against the latest EXI status. This is required
-	// for devices which interrupt frequently, such as the gc mic
-	ExpansionInterface::UpdateInterrupts();
-
 	// Read volatile data once
 	u32 exceptions = ppcState.Exceptions;