// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.

#pragma once

#include "Common/Common.h"
#include "VideoCommon/VideoBackendBase.h"

class PointerWrap;
namespace MMIO { class Mapping; }

extern bool MT;

namespace CommandProcessor
{

extern SCPFifoStruct fifo; //This one is shared between gfx thread and emulator thread.
extern volatile bool isPossibleWaitingSetDrawDone; //This one is used for sync gfx thread and emulator thread.
extern volatile bool interruptSet;
extern volatile bool interruptWaiting;
extern volatile bool interruptTokenWaiting;
extern volatile bool interruptFinishWaiting;

// internal hardware addresses
enum
{
	STATUS_REGISTER          = 0x00,
	CTRL_REGISTER            = 0x02,
	CLEAR_REGISTER           = 0x04,
	PERF_SELECT              = 0x06,
	FIFO_TOKEN_REGISTER      = 0x0E,
	FIFO_BOUNDING_BOX_LEFT   = 0x10,
	FIFO_BOUNDING_BOX_RIGHT  = 0x12,
	FIFO_BOUNDING_BOX_TOP    = 0x14,
	FIFO_BOUNDING_BOX_BOTTOM = 0x16,
	FIFO_BASE_LO             = 0x20,
	FIFO_BASE_HI             = 0x22,
	FIFO_END_LO              = 0x24,
	FIFO_END_HI              = 0x26,
	FIFO_HI_WATERMARK_LO     = 0x28,
	FIFO_HI_WATERMARK_HI     = 0x2a,
	FIFO_LO_WATERMARK_LO     = 0x2c,
	FIFO_LO_WATERMARK_HI     = 0x2e,
	FIFO_RW_DISTANCE_LO      = 0x30,
	FIFO_RW_DISTANCE_HI      = 0x32,
	FIFO_WRITE_POINTER_LO    = 0x34,
	FIFO_WRITE_POINTER_HI    = 0x36,
	FIFO_READ_POINTER_LO     = 0x38,
	FIFO_READ_POINTER_HI     = 0x3A,
	FIFO_BP_LO               = 0x3C,
	FIFO_BP_HI               = 0x3E,
	XF_RASBUSY_L             = 0x40,
	XF_RASBUSY_H             = 0x42,
	XF_CLKS_L                = 0x44,
	XF_CLKS_H                = 0x46,
	XF_WAIT_IN_L             = 0x48,
	XF_WAIT_IN_H             = 0x4a,
	XF_WAIT_OUT_L            = 0x4c,
	XF_WAIT_OUT_H            = 0x4e,
	VCACHE_METRIC_CHECK_L    = 0x50,
	VCACHE_METRIC_CHECK_H    = 0x52,
	VCACHE_METRIC_MISS_L     = 0x54,
	VCACHE_METRIC_MISS_H     = 0x56,
	VCACHE_METRIC_STALL_L    = 0x58,
	VCACHE_METRIC_STALL_H    = 0x5A,
	CLKS_PER_VTX_IN_L        = 0x60,
	CLKS_PER_VTX_IN_H        = 0x62,
	CLKS_PER_VTX_OUT         = 0x64,
};

enum
{
	GATHER_PIPE_SIZE = 32,
	INT_CAUSE_CP =  0x800
};

// Fifo Status Register
union UCPStatusReg
{
	struct
	{
		u16 OverflowHiWatermark  : 1;
		u16 UnderflowLoWatermark : 1;
		u16 ReadIdle             : 1;
		u16 CommandIdle          : 1;
		u16 Breakpoint           : 1;
		u16                      : 11;
	};
	u16 Hex;
	UCPStatusReg() {Hex = 0; }
	UCPStatusReg(u16 _hex) {Hex = _hex; }
};

// Fifo Control Register
union UCPCtrlReg
{
	struct
	{
		u16 GPReadEnable           : 1;
		u16 BPEnable               : 1;
		u16 FifoOverflowIntEnable  : 1;
		u16 FifoUnderflowIntEnable : 1;
		u16 GPLinkEnable           : 1;
		u16 BPInt                  : 1;
		u16                        : 10;
	};
	u16 Hex;
	UCPCtrlReg() {Hex = 0; }
	UCPCtrlReg(u16 _hex) {Hex = _hex; }
};

// Fifo Clear Register
union UCPClearReg
{
	struct
	{
		u16 ClearFifoOverflow  : 1;
		u16 ClearFifoUnderflow : 1;
		u16 ClearMetrices      : 1;
		u16                    : 13;
	};
	u16 Hex;
	UCPClearReg() {Hex = 0; }
	UCPClearReg(u16 _hex) {Hex = _hex; }
};

// Can be any number, low enough to not be below the number of clocks executed by the GPU per CP_PERIOD
const static u32 m_cpClockOrigin = 200000;

// Init
void Init();
void Shutdown();
void DoState(PointerWrap &p);

void RegisterMMIO(MMIO::Mapping* mmio, u32 base);

void SetCPStatusFromGPU();
void SetCPStatusFromCPU();
void GatherPipeBursted();
void UpdateInterrupts(u64 userdata);
void UpdateInterruptsFromVideoBackend(u64 userdata);

bool AllowIdleSkipping();

void SetCpClearRegister();
void SetCpControlRegister();
void SetCpStatusRegister();
void ProcessFifoAllDistance();
void ProcessFifoEvents();

void Update();
extern volatile u32 VITicks;

} // namespace CommandProcessor