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