mirror of
https://github.com/RetroDECK/Duckstation.git
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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
98 lines
2.2 KiB
C++
98 lines
2.2 KiB
C++
#pragma once
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#include "common/bitfield.h"
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#include "types.h"
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#include <array>
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#include <memory>
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class StateWrapper;
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class TimingEvent;
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class GPU;
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class Timers final
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{
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public:
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Timers();
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~Timers();
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void Initialize();
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void Shutdown();
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void Reset();
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bool DoState(StateWrapper& sw);
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void SetGate(u32 timer, bool state);
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void DrawDebugStateWindow();
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// dot clock/hblank/sysclk div 8
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ALWAYS_INLINE bool IsUsingExternalClock(u32 timer) const { return m_states[timer].external_counting_enabled; }
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// queries for GPU
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ALWAYS_INLINE bool IsExternalIRQEnabled(u32 timer) const
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{
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const CounterState& cs = m_states[timer];
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return (cs.external_counting_enabled && (cs.mode.bits & ((1u << 4) | (1u << 5))) != 0);
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}
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TickCount GetTicksUntilIRQ(u32 timer) const;
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void AddTicks(u32 timer, TickCount ticks);
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u32 ReadRegister(u32 offset);
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void WriteRegister(u32 offset, u32 value);
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private:
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static constexpr u32 NUM_TIMERS = 3;
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enum class SyncMode : u8
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{
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PauseOnGate = 0,
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ResetOnGate = 1,
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ResetAndRunOnGate = 2,
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FreeRunOnGate = 3
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};
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union CounterMode
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{
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u32 bits;
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BitField<u32, bool, 0, 1> sync_enable;
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BitField<u32, SyncMode, 1, 2> sync_mode;
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BitField<u32, bool, 3, 1> reset_at_target;
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BitField<u32, bool, 4, 1> irq_at_target;
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BitField<u32, bool, 5, 1> irq_on_overflow;
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BitField<u32, bool, 6, 1> irq_repeat;
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BitField<u32, bool, 7, 1> irq_pulse_n;
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BitField<u32, u8, 8, 2> clock_source;
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BitField<u32, bool, 10, 1> interrupt_request_n;
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BitField<u32, bool, 11, 1> reached_target;
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BitField<u32, bool, 12, 1> reached_overflow;
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};
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struct CounterState
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{
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CounterMode mode;
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u32 counter;
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u32 target;
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bool gate;
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bool use_external_clock;
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bool external_counting_enabled;
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bool counting_enabled;
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bool irq_done;
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};
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void UpdateCountingEnabled(CounterState& cs);
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void UpdateIRQ(u32 index);
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void AddSysClkTicks(TickCount sysclk_ticks);
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TickCount GetTicksUntilNextInterrupt() const;
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void UpdateSysClkEvent();
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std::unique_ptr<TimingEvent> m_sysclk_event;
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std::array<CounterState, NUM_TIMERS> m_states{};
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u32 m_sysclk_div_8_carry = 0; // partial ticks for timer 3 with sysclk/8
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};
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extern Timers g_timers; |