Initial commit

src/pse/dma.cpp

@@ -0,0 +1,56 @@
+#include "dma.h"
+#include "YBaseLib/Log.h"
+#include "bus.h"
+Log_SetChannel(DMA);
+
+DMA::DMA() = default;
+
+DMA::~DMA() = default;
+
+bool DMA::Initialize(Bus* bus, GPU* gpu)
+{
+  m_bus = bus;
+  m_gpu = gpu;
+  return true;
+}
+
+void DMA::Reset()
+{
+  m_state = {};
+  m_DPCR.bits = 0;
+  m_DCIR = 0;
+}
+
+u32 DMA::ReadRegister(u32 offset)
+{
+  const u32 channel_index = offset >> 4;
+  if (channel_index < 7)
+  {
+    switch (offset & UINT32_C(0x0F))
+    {
+      case 0x00:
+        return m_state[channel_index].base_address;
+      case 0x04:
+        return m_state[channel_index].block_control.bits;
+      case 0x08:
+        return m_state[channel_index].channel_control.bits;
+      default:
+        break;
+    }
+  }
+  else
+  {
+    if (offset == 0x70)
+      return m_DPCR.bits;
+    else if (offset == 0x74)
+      return m_DCIR;
+  }
+
+  Log_ErrorPrintf("Unhandled register read: %02X", offset);
+  return UINT32_C(0xFFFFFFFF);
+}
+
+void DMA::WriteRegister(u32 offset, u32 value)
+{
+  Log_ErrorPrintf("Unhandled register write: %02X <- %08X", offset, value);
+}