Duckstation/src/core/memory_card.h

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// SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com>
// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
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#pragma once
#include "common/bitfield.h"
#include "controller.h"
#include "memory_card_image.h"
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#include <array>
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#include <memory>
#include <string>
#include <string_view>
class TimingEvent;
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class MemoryCard final
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{
public:
JIT optimizations and refactoring (#675) * 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
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MemoryCard();
~MemoryCard();
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static constexpr u32 STATE_SIZE = 1 + 1 + 2 + 1 + 1 + 1 + MemoryCardImage::DATA_SIZE + 1;
static std::string SanitizeGameTitleForFileName(const std::string_view& name);
JIT optimizations and refactoring (#675) * 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
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static std::unique_ptr<MemoryCard> Create();
static std::unique_ptr<MemoryCard> Open(std::string_view filename);
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const MemoryCardImage::DataArray& GetData() const { return m_data; }
MemoryCardImage::DataArray& GetData() { return m_data; }
const std::string& GetFilename() const { return m_filename; }
void SetFilename(std::string filename) { m_filename = std::move(filename); }
void Reset();
bool DoState(StateWrapper& sw);
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void ResetTransferState();
bool Transfer(const u8 data_in, u8* data_out);
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void Format();
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private:
enum : u32
{
// save in three seconds, that should be long enough for everything to finish writing
SAVE_DELAY_IN_SECONDS = 5,
};
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union FLAG
{
u8 bits;
BitField<u8, bool, 3, 1> no_write_yet;
BitField<u8, bool, 2, 1> write_error;
};
enum class State : u8
{
Idle,
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Command,
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ReadCardID1,
ReadCardID2,
ReadAddressMSB,
ReadAddressLSB,
ReadACK1,
ReadACK2,
ReadConfirmAddressMSB,
ReadConfirmAddressLSB,
ReadData,
ReadChecksum,
ReadEnd,
WriteCardID1,
WriteCardID2,
WriteAddressMSB,
WriteAddressLSB,
WriteData,
WriteChecksum,
WriteACK1,
WriteACK2,
WriteEnd,
};
static TickCount GetSaveDelayInTicks();
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bool LoadFromFile();
bool SaveIfChanged(bool display_osd_message);
void QueueFileSave();
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std::unique_ptr<TimingEvent> m_save_event;
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State m_state = State::Idle;
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FLAG m_FLAG = {};
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u16 m_address = 0;
u8 m_sector_offset = 0;
u8 m_checksum = 0;
u8 m_last_byte = 0;
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bool m_changed = false;
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MemoryCardImage::DataArray m_data{};
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std::string m_filename;
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};