Rename to DuckStation

2025-06-18 13:05:46 -04:00 · 2019-10-04 13:54:09 +10:00
parent 92ec5a0a14
commit bddbab9d60
61 changed files with 43 additions and 54 deletions
--- a/src/core/spu.h
+++ b/src/core/spu.h
@ -0,0 +1,99 @@
+#pragma once
+#include "common/bitfield.h"
+#include "types.h"
+#include <array>
+
+class StateWrapper;
+
+class System;
+class DMA;
+class InterruptController;
+
+class SPU
+{
+public:
+  SPU();
+  ~SPU();
+
+  bool Initialize(System* system, DMA* dma, InterruptController* interrupt_controller);
+  void Reset();
+  bool DoState(StateWrapper& sw);
+
+  u16 ReadRegister(u32 offset);
+  void WriteRegister(u32 offset, u16 value);
+
+  u32 DMARead();
+  void DMAWrite(u32 value);
+
+private:
+  static constexpr u32 RAM_SIZE = 512 * 1024;
+  static constexpr u32 RAM_MASK = RAM_SIZE - 1;
+  static constexpr u32 SPU_BASE = 0x1F801C00;
+
+  enum class RAMTransferMode : u8
+  {
+    Stopped =0,
+    ManualWrite = 1,
+    DMAWrite = 2,
+    DMARead = 3
+  };
+
+  union SPUCNT
+  {
+    u16 bits;
+
+    BitField<u16, bool, 15, 1> enable;
+    BitField<u16, bool, 14, 1> mute;
+    BitField<u16, u8, 10, 4> noise_frequency_shift;
+    BitField<u16, u8, 8, 2> noise_frequency_step;
+    BitField<u16, bool, 7, 1> reverb_master_enable;
+    BitField<u16, bool, 6, 1> irq9_enable;
+    BitField<u16, RAMTransferMode, 4, 2> ram_transfer_mode;
+    BitField<u16, bool, 3, 1> external_audio_reverb;
+    BitField<u16, bool, 2, 1> cd_audio_reverb;
+    BitField<u16, bool, 1, 1> external_audio_enable;
+    BitField<u16, bool, 0, 1> cd_audio_enable;
+
+    BitField<u16, u8, 0, 6> mode;
+  };
+
+  union SPUSTAT
+  {
+    u16 bits;
+
+    BitField<u16, bool, 11, 1> second_half_capture_buffer;
+    BitField<u16, bool, 10, 1> transfer_busy;
+    BitField<u16, bool, 9, 1> dma_read_request;
+    BitField<u16, bool, 8, 1> dma_write_request;
+    BitField<u16, bool, 7, 1> dma_read_write_request;
+    BitField<u16, bool, 6, 1> irq9_flag;
+    BitField<u16, u8, 0, 6> mode;
+  };
+
+#if 0
+  struct Voice
+  {
+    static constexpr u32 NUM_REGS = 8;
+    static constexpr u32 NUM_FLAGS = 6;
+
+    std::array<u16, NUM_REGS> regs;
+    
+  };
+#endif
+
+  void UpdateDMARequest();
+  u16 RAMTransferRead();
+  void RAMTransferWrite(u16 value);
+
+  System* m_system = nullptr;
+  DMA* m_dma = nullptr;
+  InterruptController* m_interrupt_controller = nullptr;
+
+  SPUCNT m_SPUCNT = {};
+  SPUSTAT m_SPUSTAT = {};
+
+  u16 m_transfer_address_reg = 0;
+  u32 m_transfer_address = 0;
+
+  std::array<u8, RAM_SIZE> m_ram{};
+};