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Set DMA in defined state

This commit is contained in:
Jaby 2024-03-09 23:37:07 -06:00
parent 9c6b47e0fa
commit 948f59dde0
2 changed files with 16 additions and 0 deletions
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4
include/PSX/System/IOPorts/dma_io.hpp
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@ -161,6 +161,10 @@ namespace JabyEngine {
static constexpr auto MasterEnableDPCR = Bit(23); static constexpr auto MasterEnableDPCR = Bit(23);
static constexpr auto EnableDPCR = BitRange::from_to(16, 22); static constexpr auto EnableDPCR = BitRange::from_to(16, 22);
static constexpr auto ForceIRQ = Bit(15); static constexpr auto ForceIRQ = Bit(15);
static constexpr DICR empty() {
return DICR{0};
}
}; };
__declare_value_at(, Registers, MDECin, 0x1F801080); __declare_value_at(, Registers, MDECin, 0x1F801080);

12
src/Library/src/BootLoader/dma_boot.cpp
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@ -1,12 +1,24 @@
#include <PSX/System/IOPorts/dma_io.hpp> #include <PSX/System/IOPorts/dma_io.hpp>
#include <PSX/System/syscalls.hpp>
#include <PSX/System/IOPorts/interrupt_io.hpp>
#include <stdio.h>
namespace JabyEngine { namespace JabyEngine {
namespace boot { namespace boot {
namespace DMA { namespace DMA {
// TODO: Do we want all of this? So far it didn't help
void setup() { void setup() {
static constexpr auto EnableDMA = DMA_IO::DPCR::from(DMA_IO::DPCR::SPU.turn_on(3), DMA_IO::DPCR::GPU.turn_on(3), DMA_IO::DPCR::CDROM.turn_on(3)); static constexpr auto EnableDMA = DMA_IO::DPCR::from(DMA_IO::DPCR::SPU.turn_on(3), DMA_IO::DPCR::GPU.turn_on(3), DMA_IO::DPCR::CDROM.turn_on(3));
DMA_IO::DPCR.write(EnableDMA); DMA_IO::DPCR.write(EnableDMA);
DMA_IO::DICR.write(DMA_IO::DICR::empty());
DMA_IO::DICR.write(DMA_IO::DICR.read());
SysCall::EnterCriticalSection();
Interrupt::disable_irq(Interrupt::DMA);
Interrupt::ack_irq(Interrupt::DMA);
SysCall::ExitCriticalSection();
} }
} }
} }