void CEXIChannel::RegisterMMIO(MMIO::Mapping* mmio, u32 base)
{
// Warning: the base is not aligned on a page boundary here. We can't use |
// to select a register address, instead we need to use +.
mmio->Register(base + EXI_STATUS, MMIO::ComplexRead<u32>([this](u32) {
// check if external device is present
// pretty sure it is memcard only, not entirely sure
if (m_ChannelId == 2)
{
m_Status.EXT = 0;
}
else
{
m_Status.EXT = GetDevice(1)->IsPresent() ? 1 : 0;
}
return m_Status.Hex;
}),
MMIO::ComplexWrite<u32>([this](u32, u32 val) {
UEXI_STATUS newStatus(val);
m_Status.EXIINTMASK = newStatus.EXIINTMASK;
if (newStatus.EXIINT)
m_Status.EXIINT = 0;
m_Status.TCINTMASK = newStatus.TCINTMASK;
if (newStatus.TCINT)
m_Status.TCINT = 0;
m_Status.CLK = newStatus.CLK;
if (m_ChannelId == 0 || m_ChannelId == 1)
{
m_Status.EXTINTMASK = newStatus.EXTINTMASK;
if (newStatus.EXTINT)
m_Status.EXTINT = 0;
}
if (m_ChannelId == 0)
m_Status.ROMDIS = newStatus.ROMDIS;
IEXIDevice* pDevice = GetDevice(m_Status.CHIP_SELECT ^ newStatus.CHIP_SELECT);
m_Status.CHIP_SELECT = newStatus.CHIP_SELECT;
if (pDevice != nullptr)
pDevice->SetCS(m_Status.CHIP_SELECT);
ExpansionInterface::UpdateInterrupts();
}));
mmio->Register(base + EXI_DMAADDR, MMIO::DirectRead<u32>(&m_DMAMemoryAddress),
MMIO::DirectWrite<u32>(&m_DMAMemoryAddress));
mmio->Register(base + EXI_DMALENGTH, MMIO::DirectRead<u32>(&m_DMALength),
MMIO::DirectWrite<u32>(&m_DMALength));
mmio->Register(base + EXI_DMACONTROL, MMIO::DirectRead<u32>(&m_Control.Hex),
MMIO::ComplexWrite<u32>([this](u32, u32 val) {
m_Control.Hex = val;
if (m_Control.TSTART)
{
IEXIDevice* pDevice = GetDevice(m_Status.CHIP_SELECT);
if (pDevice == nullptr)
return;
if (m_Control.DMA == 0)
{
// immediate data
switch (m_Control.RW)
{
case EXI_READ:
m_ImmData = pDevice->ImmRead(m_Control.TLEN + 1);
break;
case EXI_WRITE:
pDevice->ImmWrite(m_ImmData, m_Control.TLEN + 1);
break;
case EXI_READWRITE:
pDevice->ImmReadWrite(m_ImmData, m_Control.TLEN + 1);
break;
default:
_dbg_assert_msg_(EXPANSIONINTERFACE, 0,
"EXI Imm: Unknown transfer type %i", m_Control.RW);
}
}
else
{
// DMA
switch (m_Control.RW)
{
case EXI_READ:
pDevice->DMARead(m_DMAMemoryAddress, m_DMALength);
break;
case EXI_WRITE:
pDevice->DMAWrite(m_DMAMemoryAddress, m_DMALength);
break;
default:
_dbg_assert_msg_(EXPANSIONINTERFACE, 0,
"EXI DMA: Unknown transfer type %i", m_Control.RW);
}
}
m_Control.TSTART = 0;
// Check if device needs specific timing, otherwise just complete transfer
// immediately
if (!pDevice->UseDelayedTransferCompletion())
SendTransferComplete();
}
}));
mmio->Register(base + EXI_IMMDATA, MMIO::DirectRead<u32>(&m_ImmData),
MMIO::DirectWrite<u32>(&m_ImmData));
}
