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project64/Source/Project64-core/N64System/MemoryHandler/SPRegistersHandler.cpp

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#include "stdafx.h"
#include "SPRegistersHandler.h"
#include <Project64-core\N64System\Mips\MemoryVirtualMem.h>
#include <Project64-core\N64System\Mips\Register.h>
#include <Project64-core\N64System\N64System.h>
#include <Project64-core\N64System\SystemGlobals.h>
SPRegistersReg::SPRegistersReg(uint32_t * SignalProcessorInterface) :
SP_MEM_ADDR_REG(SignalProcessorInterface[0]),
SP_DRAM_ADDR_REG(SignalProcessorInterface[1]),
SP_RD_LEN_REG(SignalProcessorInterface[2]),
SP_WR_LEN_REG(SignalProcessorInterface[3]),
SP_STATUS_REG(SignalProcessorInterface[4]),
SP_DMA_FULL_REG(SignalProcessorInterface[5]),
SP_DMA_BUSY_REG(SignalProcessorInterface[6]),
SP_SEMAPHORE_REG(SignalProcessorInterface[7]),
SP_PC_REG(SignalProcessorInterface[8]),
SP_IBIST_REG(SignalProcessorInterface[9])
{
}
SPRegistersHandler::SPRegistersHandler(CN64System & System, CMipsMemoryVM & MMU, CRegisters & Reg) :
SPRegistersReg(Reg.m_SigProcessor_Interface),
MIPSInterfaceReg(Reg.m_Mips_Interface),
m_SPMemAddrRegRead(0),
m_SPDramAddrRegRead(0),
m_ExecutedDMARead(false),
m_System(System),
m_MMU(MMU),
m_Reg(Reg),
m_RspIntrReg(Reg.m_RspIntrReg),
m_PC(Reg.m_PROGRAM_COUNTER)
{
System.RegisterCallBack(CN64SystemCB_Reset, this, (CN64System::CallBackFunction)stSystemReset);
System.RegisterCallBack(CN64SystemCB_LoadedGameState, this, (CN64System::CallBackFunction)stLoadedGameState);
}
bool SPRegistersHandler::Read32(uint32_t Address, uint32_t & Value)
{
if (Address < 0x04040000)
{
if ((Address & 0x1000) == 0)
{
Value = *((uint32_t *)&m_DMEM[Address & 0xFFC]);
}
else
{
Value = *((uint32_t *)&m_IMEM[Address & 0xFFC]);
}
return true;
}
switch (Address & 0x1FFFFFFF)
{
case 0x04040000: Value = m_ExecutedDMARead ? m_SPMemAddrRegRead : SP_MEM_ADDR_REG; break;
case 0x04040004: Value = m_ExecutedDMARead ? m_SPDramAddrRegRead : SP_DRAM_ADDR_REG; break;
case 0x04040008: Value = SP_RD_LEN_REG; break;
case 0x0404000C: Value = SP_WR_LEN_REG; break;
case 0x04040010: Value = SP_STATUS_REG; break;
case 0x04040014: Value = SP_DMA_FULL_REG; break;
case 0x04040018: Value = SP_DMA_BUSY_REG; break;
case 0x0404001C:
Value = SP_SEMAPHORE_REG;
SP_SEMAPHORE_REG = 1;
break;
case 0x04080000: Value = SP_PC_REG; break;
default:
Value = 0;
if (BreakOnUnhandledMemory())
{
g_Notify->BreakPoint(__FILE__, __LINE__);
}
}
if (LogSPRegisters())
{
switch (Address & 0x1FFFFFFF)
{
case 0x04040000: LogMessage("%08X: read from SP_MEM_ADDR_REG (%08X)", m_PC, Value); break;
case 0x04040004: LogMessage("%08X: read from SP_DRAM_ADDR_REG (%08X)", m_PC, Value); break;
case 0x04040008: LogMessage("%08X: read from SP_RD_LEN_REG (%08X)", m_PC, Value); break;
case 0x0404000C: LogMessage("%08X: read from SP_WR_LEN_REG (%08X)", m_PC, Value); break;
case 0x04040010: LogMessage("%08X: read from SP_STATUS_REG (%08X)", m_PC, Value); break;
case 0x04040014: LogMessage("%08X: read from SP_DMA_FULL_REG (%08X)", m_PC, Value); break;
case 0x04040018: LogMessage("%08X: read from SP_DMA_BUSY_REG (%08X)", m_PC, Value); break;
case 0x0404001C: LogMessage("%08X: read from SP_SEMAPHORE_REG (%08X)", m_PC, Value); break;
case 0x04080000: LogMessage("%08X: read from SP_PC (%08X)", m_PC, Value); break;
default:
if (BreakOnUnhandledMemory())
{
g_Notify->BreakPoint(__FILE__, __LINE__);
}
}
}
return true;
}
bool SPRegistersHandler::Write32(uint32_t Address, uint32_t Value, uint32_t Mask)
{
uint32_t MaskedValue = Value & Mask;
if (Address < 0x04040000)
{
if ((Address & 0x1000) == 0)
{
*((uint32_t *)&m_DMEM[Address & 0xFFC]) = MaskedValue;
}
else
{
*((uint32_t *)&m_IMEM[Address & 0xFFC]) = MaskedValue;
}
return true;
}
if (GenerateLog() && LogSPRegisters())
{
switch (Address & 0x1FFFFFFF)
{
case 0x04040000: LogMessage("%08X: Writing 0x%08X (Mask: 0x%08X) to SP_MEM_ADDR_REG", m_PC, Value, Mask); break;
case 0x04040004: LogMessage("%08X: Writing 0x%08X (Mask: 0x%08X) to SP_DRAM_ADDR_REG", m_PC, Value, Mask); break;
case 0x04040008: LogMessage("%08X: Writing 0x%08X (Mask: 0x%08X) to SP_RD_LEN_REG", m_PC, Value, Mask); break;
case 0x0404000C: LogMessage("%08X: Writing 0x%08X (Mask: 0x%08X) to SP_WR_LEN_REG", m_PC, Value, Mask); break;
case 0x04040010: LogMessage("%08X: Writing 0x%08X (Mask: 0x%08X) to SP_STATUS_REG", m_PC, Value, Mask); break;
case 0x04040014: LogMessage("%08X: Writing 0x%08X (Mask: 0x%08X) to SP_DMA_FULL_REG", m_PC, Value, Mask); break;
case 0x04040018: LogMessage("%08X: Writing 0x%08X (Mask: 0x%08X) to SP_DMA_BUSY_REG", m_PC, Value, Mask); break;
case 0x0404001C: LogMessage("%08X: Writing 0x%08X (Mask: 0x%08X) to SP_SEMAPHORE_REG", m_PC, Value, Mask); break;
case 0x04080000: LogMessage("%08X: Writing 0x%08X (Mask: 0x%08X) to SP_PC", m_PC, Value, Mask); break;
default:
if (BreakOnUnhandledMemory())
{
g_Notify->BreakPoint(__FILE__, __LINE__);
}
}
}
switch (Address & 0x1FFFFFFF)
{
case 0x04040000: SP_MEM_ADDR_REG = (SP_MEM_ADDR_REG & ~Mask) | (MaskedValue); break;
case 0x04040004: SP_DRAM_ADDR_REG = (SP_DRAM_ADDR_REG & ~Mask) | (MaskedValue); break;
case 0x04040008:
SP_RD_LEN_REG = MaskedValue;
SP_DMA_READ();
break;
case 0x0404000C:
SP_WR_LEN_REG = (SP_WR_LEN_REG & ~Mask) | (MaskedValue);
SP_DMA_WRITE();
break;
case 0x04040010:
if ((MaskedValue & SP_CLR_HALT) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_HALT;
}
if ((MaskedValue & SP_SET_HALT) != 0)
{
SP_STATUS_REG |= SP_STATUS_HALT;
}
if ((MaskedValue & SP_CLR_BROKE) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_BROKE;
}
if ((MaskedValue & SP_CLR_INTR) != 0)
{
MI_INTR_REG &= ~MI_INTR_SP;
m_RspIntrReg &= ~MI_INTR_SP;
m_Reg.CheckInterrupts();
}
if ((MaskedValue & SP_SET_INTR) != 0)
{
if (BreakOnUnhandledMemory())
{
g_Notify->BreakPoint(__FILE__, __LINE__);
}
}
if ((MaskedValue & SP_CLR_SSTEP) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_SSTEP;
}
if ((MaskedValue & SP_SET_SSTEP) != 0)
{
SP_STATUS_REG |= SP_STATUS_SSTEP;
}
if ((MaskedValue & SP_CLR_INTR_BREAK) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_INTR_BREAK;
}
if ((MaskedValue & SP_SET_INTR_BREAK) != 0)
{
SP_STATUS_REG |= SP_STATUS_INTR_BREAK;
}
if ((MaskedValue & SP_CLR_SIG0) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_SIG0;
}
if ((MaskedValue & SP_SET_SIG0) != 0)
{
SP_STATUS_REG |= SP_STATUS_SIG0;
}
if ((MaskedValue & SP_CLR_SIG1) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_SIG1;
}
if ((MaskedValue & SP_SET_SIG1) != 0)
{
SP_STATUS_REG |= SP_STATUS_SIG1;
}
if ((MaskedValue & SP_CLR_SIG2) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_SIG2;
}
if ((MaskedValue & SP_SET_SIG2) != 0)
{
SP_STATUS_REG |= SP_STATUS_SIG2;
}
if ((MaskedValue & SP_CLR_SIG3) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_SIG3;
}
if ((MaskedValue & SP_SET_SIG3) != 0)
{
SP_STATUS_REG |= SP_STATUS_SIG3;
}
if ((MaskedValue & SP_CLR_SIG4) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_SIG4;
}
if ((MaskedValue & SP_SET_SIG4) != 0)
{
SP_STATUS_REG |= SP_STATUS_SIG4;
}
if ((MaskedValue & SP_CLR_SIG5) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_SIG5;
}
if ((MaskedValue & SP_SET_SIG5) != 0)
{
SP_STATUS_REG |= SP_STATUS_SIG5;
}
if ((MaskedValue & SP_CLR_SIG6) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_SIG6;
}
if ((MaskedValue & SP_SET_SIG6) != 0)
{
SP_STATUS_REG |= SP_STATUS_SIG6;
}
if ((MaskedValue & SP_CLR_SIG7) != 0)
{
SP_STATUS_REG &= ~SP_STATUS_SIG7;
}
if ((MaskedValue & SP_SET_SIG7) != 0)
{
SP_STATUS_REG |= SP_STATUS_SIG7;
}
if ((MaskedValue & SP_SET_SIG0) != 0 && RspAudioSignal())
{
MI_INTR_REG |= MI_INTR_SP;
m_Reg.CheckInterrupts();
}
m_System.RunRSP();
break;
case 0x0404001C: SP_SEMAPHORE_REG = 0; break;
case 0x04080000: SP_PC_REG = MaskedValue & 0xFFC; break;
default:
if (BreakOnUnhandledMemory())
{
g_Notify->BreakPoint(__FILE__, __LINE__);
}
}
return true;
}
void SPRegistersHandler::SP_DMA_READ()
{
uint8_t * Dest = ((SP_MEM_ADDR_REG & 0x1000) != 0 ? m_IMEM : m_DMEM);
uint8_t * Source = m_MMU.Rdram();
uint32_t ReadPos = SP_DRAM_ADDR_REG & 0x00FFFFF8;
int32_t Length = ((SP_RD_LEN_REG & 0xFFF) | 7) + 1;
int32_t Count = ((SP_RD_LEN_REG >> 12) & 0xFF) + 1;
int32_t Skip = (SP_RD_LEN_REG >> 20) & 0xF8;
int32_t Pos = (SP_MEM_ADDR_REG & 0x0FF8);
for (int32_t i = 0; i < Count; i++)
{
int32_t CopyLength = Length;
if ((Pos + Length) > 0x1000)
{
CopyLength = 0x1000 - Pos;
if (CopyLength <= 0)
{
break;
}
}
uint32_t NullLen = 0;
if ((ReadPos + Length) > m_MMU.RdramSize())
{
if ((m_MMU.RdramSize() - ReadPos) < (uint32_t)CopyLength)
{
CopyLength = (int32_t)m_MMU.RdramSize() - (int32_t)ReadPos;
}
else
{
NullLen = CopyLength;
}
}
if (NullLen != 0)
{
memset(&Dest[Pos], 0, NullLen);
}
else
{
memcpy(&Dest[Pos], &Source[ReadPos], CopyLength);
}
if (CopyLength != Length)
{
ReadPos = (ReadPos + CopyLength) & 0x00FFFFFF;
CopyLength = Length - CopyLength;
Pos = 0;
if ((CopyLength + ReadPos) > m_MMU.RdramSize())
{
int32_t CopyAmount = m_MMU.RdramSize() - ReadPos;
if (CopyAmount < 0)
{
CopyAmount = 0;
}
NullLen = CopyLength - CopyAmount;
if (CopyAmount > 0)
{
memcpy(&Dest[Pos], &Source[ReadPos], CopyLength);
}
if (NullLen > 0)
{
memset(&Dest[Pos], 0, NullLen);
}
}
else
{
memcpy(&Dest[Pos], &Source[ReadPos], CopyLength);
}
}
ReadPos += CopyLength + Skip;
Pos += CopyLength;
}
if (Count > 1)
{
ReadPos -= Skip;
}
SP_DMA_BUSY_REG = 0;
SP_STATUS_REG &= ~SP_STATUS_DMA_BUSY;
m_ExecutedDMARead = true;
m_SPMemAddrRegRead = Pos | (SP_MEM_ADDR_REG & 0x1000);
m_SPDramAddrRegRead = ReadPos;
SP_RD_LEN_REG = (SP_RD_LEN_REG & 0xFF800000) | 0x00000FF8;
SP_WR_LEN_REG = (SP_RD_LEN_REG & 0xFF800000) | 0x00000FF8;
}
void SPRegistersHandler::SP_DMA_WRITE()
{
uint8_t * Source = ((SP_MEM_ADDR_REG & 0x1000) != 0 ? m_IMEM : m_DMEM);
uint8_t * Dest = m_MMU.Rdram();
uint32_t WritePos = SP_DRAM_ADDR_REG & 0x00FFFFF8;
int32_t Length = ((SP_WR_LEN_REG & 0xFFF) | 7) + 1;
int32_t Count = ((SP_WR_LEN_REG >> 12) & 0xFF) + 1;
int32_t Skip = (SP_WR_LEN_REG >> 20) & 0xF8;
int32_t Pos = (SP_MEM_ADDR_REG & 0x0FF8);
for (int32_t i = 0; i < Count; i++)
{
int32_t CopyLength = Length;
if (Pos + Length > 0x1000)
{
CopyLength = 0x1000 - Pos;
if (CopyLength <= 0)
{
break;
}
}
if (WritePos < m_MMU.RdramSize())
{
int32_t CopyAmount = (int32_t)m_MMU.RdramSize() - (int32_t)WritePos;
if (CopyLength < CopyAmount)
{
CopyAmount = CopyLength;
}
if (CopyAmount > 0)
{
memcpy(&Dest[WritePos], &Source[Pos], CopyAmount);
}
}
if (CopyLength != Length)
{
WritePos = (WritePos + CopyLength) & 0x00FFFFFF;
CopyLength = Length - CopyLength;
Pos = 0;
int32_t CopyAmount = (int32_t)m_MMU.RdramSize() - (int32_t)WritePos;
if (CopyLength < CopyAmount)
{
CopyAmount = CopyLength;
}
if (CopyAmount > 0)
{
memcpy(&Dest[WritePos], &Source[Pos], CopyAmount);
}
}
WritePos += CopyLength + Skip;
Pos += CopyLength;
}
if (Count > 1)
{
WritePos -= Skip;
}
SP_DMA_BUSY_REG = 0;
SP_STATUS_REG &= ~SP_STATUS_DMA_BUSY;
m_ExecutedDMARead = true;
m_SPMemAddrRegRead = Pos | (SP_MEM_ADDR_REG & 0x1000);
m_SPDramAddrRegRead = WritePos;
SP_RD_LEN_REG = (SP_WR_LEN_REG & 0xFF800000) | 0x00000FF8;
SP_WR_LEN_REG = (SP_WR_LEN_REG & 0xFF800000) | 0x00000FF8;
}
void SPRegistersHandler::SystemReset(void)
{
SP_RD_LEN_REG = 0x00000FF8;
SP_WR_LEN_REG = 0x00000FF8;
memset(m_IMEM, 0, sizeof(m_IMEM));
memset(m_DMEM, 0, sizeof(m_DMEM));
}
void SPRegistersHandler::LoadedGameState(void)
{
m_SPMemAddrRegRead = 0;
m_ExecutedDMARead = false;
}
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