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jabyengine
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This commit is contained in:
jaby 2023-01-13 19:16:04 +01:00
parent e3499dcd1e
commit c1f86c11c3
2 changed files with 50 additions and 6 deletions
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4
include/PSX/Auxiliary/complex_bitmap.hpp
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@ -49,6 +49,10 @@ namespace JabyEngine {
constexpr BitRangeValue<T> with(T value) const {
return {value, this->begin, this->length};
}
constexpr BitRangeValue<T> max() const {
return BitRange<T>::with((1 << this->length) - 1);
}
};
template<typename T>

52
include/PSX/System/IOPorts/cd_io.hpp
View File

@ -23,23 +23,63 @@ namespace JabyEngine {
static constexpr auto IsTransmissionBusy = Bit<uint8_t>(7);
};
struct __no_align InterruptEnable : public ComplexBitMap<uint8_t> {
__io_port_inherit_complex_bit_map(InterruptEnable);
static constexpr auto InterruptTypValue = BitRange<uint8_t>::from_to(0, 2);
static constexpr auto UnknownIRQ = Bit<uint8_t>(3);
static constexpr auto CommandStartIRQ = Bit<uint8_t>(4);
};
typedef InterruptEnable InterruptFlag;
struct __no_align Request : public ComplexBitMap<uint8_t> {
__io_port_inherit_complex_bit_map(Request);
static constexpr auto WantCommandStartIRQ = Bit<uint8_t>(5);
static constexpr auto WantData = Bit<uint8_t>(7);
};
struct Interrupt {
/*static void enable_all(IOPort<InterruptEnable>& port) {
port.write_combined(InterruptEnable::InterruptTypValue.max(), InterruptEnable::UnknownIRQ, InterruptEnable::CommandStartIRQ);
}
static uint8_t get_type(const IOPort<InterruptFlag>& port) {
return port.read().get_value(InterruptFlag::InterruptTypValue);
}
static void ack(IOPort<InterruptFlag>& port) {
port.write_combined(InterruptFlag::InterruptTypValue.max());
}*/
};
typedef uint8_t ResponseFifo;
typedef uint8_t CommandFifo;
typedef uint8_t DataFifo;
typedef uint16_t DataFifo16;
typedef uint8_t ParameterFifo;
namespace Index0Types {
struct __no_align IndexTriplet {
// Replace with proper types later
union __no_align {
const IOPort<uint8_t> response_fifo;
IOPort<uint8_t> command;
const IOPort<ResponseFifo> response_fifo;
IOPort<CommandFifo> command;
};
union __no_align {
const IOPort<uint8_t> data_fifo;
IOPort<uint8_t> parameter_fifo;
const IOPort<DataFifo> data_fifo;
IOPort<ParameterFifo> parameter_fifo;
};
union __no_align {
const IOPort<uint8_t> irq_enable;
IOPort<uint8_t> irq_request;
const IOPort<InterruptEnable> irq_enable;
IOPort<Request> request;
};
const IOPort<uint16_t>& get_data_fifo_16() const {
return *reinterpret_cast<const IOPort<uint16_t>*>(&this->data_fifo);
}
};
static_assert(sizeof(IndexTriplet) == 3);