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DMA: Fix DICR write breaking FMVs in FF7

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This commit is contained in:
Connor McLaughlin 2019-10-18 00:23:11 +10:00
parent 9d5f3c1306
commit 6b4298541c
2 changed files with 32 additions and 13 deletions
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40
src/core/dma.cpp
View file

@ -30,7 +30,6 @@ bool DMA::Initialize(System* system, Bus* bus, InterruptController* interrupt_co
void DMA::Reset()
{
m_transfer_ticks = 0;
m_transfer_in_progress = false;
m_state = {};
m_DPCR.bits = 0x07654321;
@ -61,11 +60,20 @@ u32 DMA::ReadRegister(u32 offset)
switch (offset & UINT32_C(0x0F))
{
case 0x00:
{
Log_TracePrintf("DMA%u base address -> 0x%08X", channel_index, m_state[channel_index].base_address);
return m_state[channel_index].base_address;
}
case 0x04:
{
Log_TracePrintf("DMA%u block control -> 0x%08X", channel_index, m_state[channel_index].block_control.bits);
return m_state[channel_index].block_control.bits;
}
case 0x08:
{
Log_TracePrintf("DMA%u channel control -> 0x%08X", channel_index, m_state[channel_index].channel_control.bits);
return m_state[channel_index].channel_control.bits;
}
default:
break;
}
@ -73,9 +81,15 @@ u32 DMA::ReadRegister(u32 offset)
else
{
if (offset == 0x70)
{
Log_TracePrintf("DPCR -> 0x%08X", m_DPCR.bits);
return m_DPCR.bits;
}
else if (offset == 0x74)
{
Log_TracePrintf("DPCR -> 0x%08X", m_DPCR.bits);
return m_DICR.bits;
}
}
Log_ErrorPrintf("Unhandled register read: %02X", offset);
@ -133,7 +147,7 @@ void DMA::WriteRegister(u32 offset, u32 value)
{
Log_TracePrintf("DCIR <- 0x%08X", value);
m_DICR.bits = (m_DICR.bits & ~DICR_WRITE_MASK) | (value & DICR_WRITE_MASK);
m_DICR.bits = (m_DICR.bits & ~DICR_RESET_MASK) & (value ^ DICR_RESET_MASK);
m_DICR.bits = m_DICR.bits & ~(value & DICR_RESET_MASK);
m_DICR.UpdateMasterFlag();
return;
}
@ -186,6 +200,16 @@ bool DMA::CanRunAnyChannels() const
return false;
}
void DMA::UpdateIRQ()
{
m_DICR.UpdateMasterFlag();
if (m_DICR.master_flag)
{
Log_TracePrintf("Firing DMA master interrupt");
m_interrupt_controller->InterruptRequest(InterruptController::IRQ::DMA);
}
}
void DMA::Transfer()
{
if (m_transfer_in_progress)
@ -276,8 +300,9 @@ void DMA::TransferChannel(Channel channel)
case SyncMode::Request:
{
Log_DebugPrintf("DMA%u: Copying %u blocks of size %u %s 0x%08X", static_cast<u32>(channel),
Log_DebugPrintf("DMA%u: Copying %u blocks of size %u (%u total words) %s 0x%08X", static_cast<u32>(channel),
cs.block_control.request.GetBlockCount(), cs.block_control.request.GetBlockSize(),
cs.block_control.request.GetBlockCount() * cs.block_control.request.GetBlockSize(),
copy_to_device ? "from" : "to", current_address);
const u32 block_size = cs.block_control.request.GetBlockSize();
@ -320,14 +345,9 @@ void DMA::TransferChannel(Channel channel)
cs.channel_control.enable_busy = false;
if (m_DICR.IsIRQEnabled(channel))
{
Log_TracePrintf("Set DMA interrupt for channel %u", static_cast<u32>(channel));
Log_DebugPrintf("Set DMA interrupt for channel %u", static_cast<u32>(channel));
m_DICR.SetIRQFlag(channel);
m_DICR.UpdateMasterFlag();
if (m_DICR.master_flag)
{
Log_TracePrintf("Firing DMA interrupt");
m_interrupt_controller->InterruptRequest(InterruptController::IRQ::DMA);
}
UpdateIRQ();
}
}

5
src/core/dma.h
View file

@ -60,6 +60,7 @@ private:
// is everything enabled for a channel to operate?
bool CanTransferChannel(Channel channel) const;
bool CanRunAnyChannels() const;
void UpdateIRQ();
void Transfer();
void TransferChannel(Channel channel);
@ -78,10 +79,8 @@ private:
SPU* m_spu = nullptr;
MDEC* m_mdec = nullptr;
TickCount m_transfer_ticks = 0;
bool m_transfer_in_progress = false;
std::vector<u32> m_transfer_buffer;
bool m_transfer_in_progress = false;
struct ChannelState
{