mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-10-23 23:55:42 +00:00
b6f871d2b9
* CPU/Recompiler: Use rel32 call where possible for no-args * JitCodeBuffer: Support using preallocated buffer * CPU/Recompiler/AArch64: Use bl instead of blr for short branches * CPU/CodeCache: Allocate recompiler buffer in program space This means we don't need 64-bit moves for every call out of the recompiler. * GTE: Don't store as u16 and load as u32 * CPU/Recompiler: Add methods to emit global load/stores * GTE: Convert class to namespace * CPU/Recompiler: Call GTE functions directly * Settings: Turn into a global variable * GPU: Replace local pointers with global * InterruptController: Turn into a global pointer * System: Replace local pointers with global * Timers: Turn into a global instance * DMA: Turn into a global instance * SPU: Turn into a global instance * CDROM: Turn into a global instance * MDEC: Turn into a global instance * Pad: Turn into a global instance * SIO: Turn into a global instance * CDROM: Move audio FIFO to the heap * CPU/Recompiler: Drop ASMFunctions No longer needed since we have code in the same 4GB window. * CPUCodeCache: Turn class into namespace * Bus: Local pointer -> global pointers * CPU: Turn class into namespace * Bus: Turn into namespace * GTE: Store registers in CPU state struct Allows relative addressing on ARM. * CPU/Recompiler: Align code storage to page size * CPU/Recompiler: Fix relative branches on A64 * HostInterface: Local references to global * System: Turn into a namespace, move events out * Add guard pages * Android: Fix build
129 lines
3.2 KiB
C++
129 lines
3.2 KiB
C++
#pragma once
|
|
#include "common/bitfield.h"
|
|
#include "common/fifo_queue.h"
|
|
#include "types.h"
|
|
#include <array>
|
|
#include <memory>
|
|
|
|
class StateWrapper;
|
|
|
|
class TimingEvent;
|
|
class Controller;
|
|
class MemoryCard;
|
|
|
|
class Pad final
|
|
{
|
|
public:
|
|
Pad();
|
|
~Pad();
|
|
|
|
void Initialize();
|
|
void Shutdown();
|
|
void Reset();
|
|
bool DoState(StateWrapper& sw);
|
|
|
|
Controller* GetController(u32 slot) const { return m_controllers[slot].get(); }
|
|
void SetController(u32 slot, std::unique_ptr<Controller> dev);
|
|
|
|
MemoryCard* GetMemoryCard(u32 slot) { return m_memory_cards[slot].get(); }
|
|
void SetMemoryCard(u32 slot, std::unique_ptr<MemoryCard> dev);
|
|
|
|
u32 ReadRegister(u32 offset);
|
|
void WriteRegister(u32 offset, u32 value);
|
|
|
|
private:
|
|
static constexpr u32 NUM_SLOTS = 2;
|
|
|
|
enum class State : u32
|
|
{
|
|
Idle,
|
|
Transmitting,
|
|
WaitingForACK
|
|
};
|
|
|
|
enum class ActiveDevice : u8
|
|
{
|
|
None,
|
|
Controller,
|
|
MemoryCard
|
|
};
|
|
|
|
union JOY_CTRL
|
|
{
|
|
u16 bits;
|
|
|
|
BitField<u16, bool, 0, 1> TXEN;
|
|
BitField<u16, bool, 1, 1> SELECT;
|
|
BitField<u16, bool, 2, 1> RXEN;
|
|
BitField<u16, bool, 4, 1> ACK;
|
|
BitField<u16, bool, 6, 1> RESET;
|
|
BitField<u16, u8, 8, 2> RXIMODE;
|
|
BitField<u16, bool, 10, 1> TXINTEN;
|
|
BitField<u16, bool, 11, 1> RXINTEN;
|
|
BitField<u16, bool, 12, 1> ACKINTEN;
|
|
BitField<u16, u8, 13, 1> SLOT;
|
|
};
|
|
|
|
union JOY_STAT
|
|
{
|
|
u32 bits;
|
|
|
|
BitField<u32, bool, 0, 1> TXRDY;
|
|
BitField<u32, bool, 1, 1> RXFIFONEMPTY;
|
|
BitField<u32, bool, 2, 1> TXDONE;
|
|
BitField<u32, bool, 7, 1> ACKINPUT;
|
|
BitField<u32, bool, 9, 1> INTR;
|
|
BitField<u32, u32, 11, 21> TMR;
|
|
};
|
|
|
|
union JOY_MODE
|
|
{
|
|
u16 bits;
|
|
|
|
BitField<u16, u8, 0, 2> reload_factor;
|
|
BitField<u16, u8, 2, 2> character_length;
|
|
BitField<u16, bool, 4, 1> parity_enable;
|
|
BitField<u16, u8, 5, 1> parity_type;
|
|
BitField<u16, u8, 8, 1> clk_polarity;
|
|
};
|
|
|
|
bool IsTransmitting() const { return m_state != State::Idle; }
|
|
bool CanTransfer() const { return m_transmit_buffer_full && m_JOY_CTRL.SELECT && m_JOY_CTRL.TXEN; }
|
|
|
|
TickCount GetTransferTicks() const { return static_cast<TickCount>(ZeroExtend32(m_JOY_BAUD) * 8); }
|
|
|
|
// From @JaCzekanski
|
|
// ACK lasts ~96 ticks or approximately 2.84us at master clock (not implemented).
|
|
// ACK delay is between 6.8us-13.7us, or ~338 ticks at master clock for approximately 9.98us.
|
|
// Memory card responds faster, approximately 5us or ~170 ticks.
|
|
static constexpr TickCount GetACKTicks(bool memory_card) { return memory_card ? 170 : 450; }
|
|
|
|
void SoftReset();
|
|
void UpdateJoyStat();
|
|
void TransferEvent(TickCount ticks_late);
|
|
void BeginTransfer();
|
|
void DoTransfer(TickCount ticks_late);
|
|
void DoACK();
|
|
void EndTransfer();
|
|
void ResetDeviceTransferState();
|
|
|
|
std::array<std::unique_ptr<Controller>, NUM_SLOTS> m_controllers;
|
|
std::array<std::unique_ptr<MemoryCard>, NUM_SLOTS> m_memory_cards;
|
|
|
|
std::unique_ptr<TimingEvent> m_transfer_event;
|
|
State m_state = State::Idle;
|
|
|
|
JOY_CTRL m_JOY_CTRL = {};
|
|
JOY_STAT m_JOY_STAT = {};
|
|
JOY_MODE m_JOY_MODE = {};
|
|
u16 m_JOY_BAUD = 0;
|
|
|
|
ActiveDevice m_active_device = ActiveDevice::None;
|
|
u8 m_receive_buffer = 0;
|
|
u8 m_transmit_buffer = 0;
|
|
u8 m_transmit_value = 0;
|
|
bool m_receive_buffer_full = false;
|
|
bool m_transmit_buffer_full = false;
|
|
};
|
|
|
|
extern Pad g_pad; |