95 lines
3.7 KiB
C++
95 lines
3.7 KiB
C++
#pragma once
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#include "cd_types.hpp"
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#include <PSX/System/syscalls.hpp>
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namespace JabyEngine {
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namespace CD {
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namespace internal {
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enum struct State {
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Ready = 0,
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Done = 0,
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XAMode,
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Reading,
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BufferFull,
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Error,
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};
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extern State current_state;
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extern uint8_t cmd_interrupt_bit;
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struct Command {
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struct Internal {
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static void wait_completed(CD_IO::Interrupt::Type irq) {
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while(bit::is_set(const_cast<volatile uint8_t&>(cmd_interrupt_bit), irq));
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}
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static void wait_completed_irq(CD_IO::Interrupt::Type irq) {
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static const auto get_next_irq = []() -> CD_IO::Interrupt::Type {
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CD_IO::Interrupt::Type cur_irq;
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do {
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cur_irq = CD_IO::Interrupt::get_type(CD_IO::PortIndex1::InterruptFlag);
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} while(cur_irq == CD_IO::Interrupt::None);
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CD_IO::Interrupt::ack_extended(CD_IO::PortIndex1::InterruptFlag);
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cmd_interrupt_bit = bit::clear(cmd_interrupt_bit, cur_irq);
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return cur_irq;
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};
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CD_IO::PortIndex1::change_to();
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while(get_next_irq() != irq);
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CD_IO::PortIndex0::change_to();
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}
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template<typename...ARGS>
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static void send(IOPort<CD_IO::CommandFifo>& cmd_fifo, IOPort<CD_IO::ParameterFifo>& parameter_fifo, CD_IO::Command::Desc cmd, ARGS...args) {
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while(CD_IO::IndexStatus.read().is_set(CD_IO::IndexStatus::IsTransmissionBusy));
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cmd_interrupt_bit = bit::set(cmd_interrupt_bit, cmd.complete_irq);
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((parameter_fifo.write(CD_IO::ParameterFifo{args})),...);
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cmd_fifo.write(CD_IO::CommandFifo {cmd.id});
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}
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};
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// Requires Index 0
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template<typename...ARGS>
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static void send_wait(CD_IO::Command::Desc cmd, ARGS...args) {
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SysCall::EnterCriticalSection();
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Internal::send(CD_IO::PortIndex0::CommandFifo, CD_IO::PortIndex0::ParameterFifo, cmd, args...);
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SysCall::ExitCriticalSection();
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Internal::wait_completed(cmd.complete_irq);
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}
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// Requires Index 0
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template<typename...ARGS>
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static void send_wait_irq(CD_IO::Command::Desc cmd, ARGS...args) {
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Internal::send(CD_IO::PortIndex0::CommandFifo, CD_IO::PortIndex0::ParameterFifo, cmd, args...);
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Internal::wait_completed_irq(cmd.complete_irq);
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}
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};
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namespace IRQ {
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void read_sector_to0(uint32_t* dst, size_t bytes);
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void resume_at0(const BCDTimeStamp& cd_time);
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}
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static State read_current_state() {
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return const_cast<volatile State&>(current_state);
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}
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void read_file(AutoLBAEntry file_info, const SectorBufferAllocator& buffer_allocator);
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void continue_reading();
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BCDTimeStamp get_loc();
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void enable_CDDA();
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void enable_CDXA(bool double_speed);
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static void pause() {
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CD_IO::PortIndex0::change_to();
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Command::send_wait(CD_IO::Command::Pause);
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}
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}
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}
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} |