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PGXP: Add initial implementation

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This commit is contained in:
Connor McLaughlin
2020-08-02 00:25:07 +10:00
parent 013497cf20
commit 0c1b637549
30 changed files with 1699 additions and 377 deletions
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20
src/core/dma.cpp
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@ -429,7 +429,8 @@ void DMA::UnhaltTransfer(TickCount ticks)
TickCount DMA::TransferMemoryToDevice(Channel channel, u32 address, u32 increment, u32 word_count)
{
const u32* src_pointer = reinterpret_cast<u32*>(Bus::g_ram + address);
if (static_cast<s32>(increment) < 0 || ((address + (increment * word_count)) & ADDRESS_MASK) <= address)
if (channel != Channel::GPU &&
(static_cast<s32>(increment) < 0 || ((address + (increment * word_count)) & ADDRESS_MASK) <= address))
{
// Use temp buffer if it's wrapping around
if (m_transfer_buffer.size() < word_count)
@ -447,8 +448,21 @@ TickCount DMA::TransferMemoryToDevice(Channel channel, u32 address, u32 incremen
switch (channel)
{
case Channel::GPU:
g_gpu->DMAWrite(src_pointer, word_count);
break;
{
if (g_gpu->BeginDMAWrite())
{
u8* ram_pointer = Bus::g_ram;
for (u32 i = 0; i < word_count; i++)
{
u32 value;
std::memcpy(&value, &ram_pointer[address], sizeof(u32));
g_gpu->DMAWrite(address, value);
address = (address + increment) & ADDRESS_MASK;
}
g_gpu->EndDMAWrite();
}
}
break;
case Channel::SPU:
g_spu.DMAWrite(src_pointer, word_count);