mirror of
https://github.com/RetroDECK/Duckstation.git
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b6f871d2b9
* CPU/Recompiler: Use rel32 call where possible for no-args * JitCodeBuffer: Support using preallocated buffer * CPU/Recompiler/AArch64: Use bl instead of blr for short branches * CPU/CodeCache: Allocate recompiler buffer in program space This means we don't need 64-bit moves for every call out of the recompiler. * GTE: Don't store as u16 and load as u32 * CPU/Recompiler: Add methods to emit global load/stores * GTE: Convert class to namespace * CPU/Recompiler: Call GTE functions directly * Settings: Turn into a global variable * GPU: Replace local pointers with global * InterruptController: Turn into a global pointer * System: Replace local pointers with global * Timers: Turn into a global instance * DMA: Turn into a global instance * SPU: Turn into a global instance * CDROM: Turn into a global instance * MDEC: Turn into a global instance * Pad: Turn into a global instance * SIO: Turn into a global instance * CDROM: Move audio FIFO to the heap * CPU/Recompiler: Drop ASMFunctions No longer needed since we have code in the same 4GB window. * CPUCodeCache: Turn class into namespace * Bus: Local pointer -> global pointers * CPU: Turn class into namespace * Bus: Turn into namespace * GTE: Store registers in CPU state struct Allows relative addressing on ARM. * CPU/Recompiler: Align code storage to page size * CPU/Recompiler: Fix relative branches on A64 * HostInterface: Local references to global * System: Turn into a namespace, move events out * Add guard pages * Android: Fix build
122 lines
2.2 KiB
C++
122 lines
2.2 KiB
C++
#include "sio.h"
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#include "common/log.h"
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#include "common/state_wrapper.h"
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#include "controller.h"
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#include "host_interface.h"
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#include "interrupt_controller.h"
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#include "memory_card.h"
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Log_SetChannel(SIO);
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SIO g_sio;
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SIO::SIO() = default;
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SIO::~SIO() = default;
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void SIO::Initialize()
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{
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Reset();
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}
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void SIO::Shutdown() {}
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void SIO::Reset()
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{
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SoftReset();
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}
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bool SIO::DoState(StateWrapper& sw)
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{
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sw.Do(&m_SIO_CTRL.bits);
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sw.Do(&m_SIO_STAT.bits);
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sw.Do(&m_SIO_MODE.bits);
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sw.Do(&m_SIO_BAUD);
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return !sw.HasError();
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}
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u32 SIO::ReadRegister(u32 offset)
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{
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switch (offset)
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{
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case 0x00: // SIO_DATA
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{
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Log_ErrorPrintf("Read SIO_DATA");
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const u8 value = 0xFF;
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return (ZeroExtend32(value) | (ZeroExtend32(value) << 8) | (ZeroExtend32(value) << 16) |
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(ZeroExtend32(value) << 24));
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}
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case 0x04: // SIO_STAT
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{
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const u32 bits = m_SIO_STAT.bits;
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return bits;
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}
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case 0x08: // SIO_MODE
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return ZeroExtend32(m_SIO_MODE.bits);
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case 0x0A: // SIO_CTRL
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return ZeroExtend32(m_SIO_CTRL.bits);
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case 0x0E: // SIO_BAUD
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return ZeroExtend32(m_SIO_BAUD);
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default:
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Log_ErrorPrintf("Unknown register read: 0x%X", offset);
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return UINT32_C(0xFFFFFFFF);
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}
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}
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void SIO::WriteRegister(u32 offset, u32 value)
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{
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switch (offset)
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{
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case 0x00: // SIO_DATA
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{
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Log_WarningPrintf("SIO_DATA (W) <- 0x%02X", value);
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return;
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}
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case 0x0A: // SIO_CTRL
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{
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Log_DebugPrintf("SIO_CTRL <- 0x%04X", value);
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m_SIO_CTRL.bits = Truncate16(value);
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if (m_SIO_CTRL.RESET)
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SoftReset();
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return;
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}
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case 0x08: // SIO_MODE
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{
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Log_DebugPrintf("SIO_MODE <- 0x%08X", value);
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m_SIO_MODE.bits = Truncate16(value);
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return;
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}
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case 0x0E:
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{
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Log_DebugPrintf("SIO_BAUD <- 0x%08X", value);
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m_SIO_BAUD = Truncate16(value);
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return;
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}
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default:
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Log_ErrorPrintf("Unknown register write: 0x%X <- 0x%08X", offset, value);
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return;
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}
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}
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void SIO::SoftReset()
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{
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m_SIO_CTRL.bits = 0;
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m_SIO_STAT.bits = 0;
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m_SIO_STAT.TXDONE = true;
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m_SIO_STAT.TXRDY = true;
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m_SIO_MODE.bits = 0;
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m_SIO_BAUD = 0xDC;
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}
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