void CN64Disk::UnallocateDiskImage()
{
m_DiskFile.Close();
if (m_DiskImageBase)
{
ProtectMemory(m_DiskImage, m_DiskFileSize, MEM_READWRITE);
delete[] m_DiskImageBase;
m_DiskImageBase = NULL;
}
m_DiskImage = NULL;
}
void CDMA::PI_DMA_READ()
{
// PI_STATUS_REG |= PI_STATUS_DMA_BUSY;
uint32_t PI_RD_LEN_REG = ((g_Reg->PI_RD_LEN_REG) & 0x00FFFFFFul) + 1;
if ((PI_RD_LEN_REG & 1) != 0)
{
PI_RD_LEN_REG += 1;
}
if (g_Reg->PI_DRAM_ADDR_REG + PI_RD_LEN_REG > g_MMU->RdramSize())
{
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("PI_DMA_READ not in Memory: %08X", g_Reg->PI_DRAM_ADDR_REG + PI_RD_LEN_REG).c_str());
}
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
//Write ROM Area (for 64DD Convert)
if (g_Reg->PI_CART_ADDR_REG >= 0x10000000 && g_Reg->PI_CART_ADDR_REG <= 0x1FBFFFFF && g_Settings->LoadBool(Game_AllowROMWrites))
{
uint32_t i;
uint8_t * ROM = g_Rom->GetRomAddress();
uint8_t * RDRAM = g_MMU->Rdram();
ProtectMemory(ROM, g_Rom->GetRomSize(), MEM_READWRITE);
g_Reg->PI_CART_ADDR_REG -= 0x10000000;
if (g_Reg->PI_CART_ADDR_REG + PI_RD_LEN_REG < g_Rom->GetRomSize())
{
for (i = 0; i < PI_RD_LEN_REG; i++)
{
*(ROM + ((g_Reg->PI_CART_ADDR_REG + i) ^ 3)) = *(RDRAM + ((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3));
}
}
else
{
uint32_t Len;
Len = g_Rom->GetRomSize() - g_Reg->PI_CART_ADDR_REG;
for (i = 0; i < Len; i++)
{
*(ROM + ((g_Reg->PI_CART_ADDR_REG + i) ^ 3)) = *(RDRAM + ((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3));
}
}
g_Reg->PI_CART_ADDR_REG += 0x10000000;
if (!g_System->DmaUsed())
{
g_System->SetDmaUsed(true);
OnFirstDMA();
}
if (g_Recompiler && g_System->bSMM_PIDMA())
{
g_Recompiler->ClearRecompCode_Phys(g_Reg->PI_DRAM_ADDR_REG, g_Reg->PI_WR_LEN_REG, CRecompiler::Remove_DMA);
}
ProtectMemory(ROM, g_Rom->GetRomSize(), MEM_READONLY);
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
if (g_Reg->PI_CART_ADDR_REG >= 0x08000000 && g_Reg->PI_CART_ADDR_REG <= 0x08010000)
{
if (g_System->m_SaveUsing == SaveChip_Auto)
{
g_System->m_SaveUsing = SaveChip_Sram;
}
if (g_System->m_SaveUsing == SaveChip_Sram)
{
m_Sram.DmaToSram(
g_MMU->Rdram() + g_Reg->PI_DRAM_ADDR_REG,
g_Reg->PI_CART_ADDR_REG - 0x08000000,
PI_RD_LEN_REG
);
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
if (g_System->m_SaveUsing == SaveChip_FlashRam)
{
m_FlashRam.DmaToFlashram(
g_MMU->Rdram() + g_Reg->PI_DRAM_ADDR_REG,
g_Reg->PI_CART_ADDR_REG - 0x08000000,
PI_RD_LEN_REG
);
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
}
if (g_System->m_SaveUsing == SaveChip_FlashRam)
{
g_Notify->DisplayError(stdstr_f("**** FLashRam DMA Read address %08X *****", g_Reg->PI_CART_ADDR_REG).c_str());
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("PI_DMA_READ where are you dmaing to ? : %08X", g_Reg->PI_CART_ADDR_REG).c_str());
}
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
~scoped_unprotect()
{
if(bUnprotected) ProtectMemory(this->addr.get(), this->size, this->dwOldProtect);
}
bool CN64Disk::AllocateAndLoadDiskImage(const char * FileLoc)
{
WriteTrace(TraceN64System, TraceDebug, "Trying to open %s", FileLoc);
if (!m_DiskFile.Open(FileLoc, CFileBase::modeRead))
{
WriteTrace(TraceN64System, TraceError, "Failed to open %s", FileLoc);
return false;
}
//Read the first 4 bytes and make sure it is a valid disk image
uint8_t Test[4];
m_DiskFile.SeekToBegin();
if (m_DiskFile.Read(Test, sizeof(Test)) != sizeof(Test))
{
m_DiskFile.Close();
WriteTrace(TraceN64System, TraceError, "Failed to read ident bytes");
return false;
}
if (!IsValidDiskImage(Test))
{
m_DiskFile.Close();
WriteTrace(TraceN64System, TraceError, "invalid image file %X %X %X %X", Test[0], Test[1], Test[2], Test[3]);
return false;
}
uint32_t DiskFileSize = m_DiskFile.GetLength();
WriteTrace(TraceN64System, TraceDebug, "Successfully Opened, size: 0x%X", DiskFileSize);
//Check Disk File Format
if (DiskFileSize == MameFormatSize)
{
//If Disk is MAME Format (size is constant, it should be the same for every file), then continue
WriteTrace(TraceN64System, TraceDebug, "Disk File is MAME Format");
if (!AllocateDiskImage(DiskFileSize))
{
m_DiskFile.Close();
return false;
}
//Load the n64 disk to the allocated memory
g_Notify->DisplayMessage(5, MSG_LOADING);
m_DiskFile.SeekToBegin();
uint32_t count, TotalRead = 0;
for (count = 0; count < (int)DiskFileSize; count += ReadFromRomSection)
{
uint32_t dwToRead = DiskFileSize - count;
if (dwToRead > ReadFromRomSection) { dwToRead = ReadFromRomSection; }
if (m_DiskFile.Read(&m_DiskImage[count], dwToRead) != dwToRead)
{
m_DiskFile.Close();
SetError(MSG_FAIL_IMAGE);
WriteTrace(TraceN64System, TraceError, "Failed to read file (TotalRead: 0x%X)", TotalRead);
return false;
}
TotalRead += dwToRead;
//Show Message of how much % wise of the rom has been loaded
g_Notify->DisplayMessage(0, stdstr_f("%s: %.2f%c", GS(MSG_LOADED), ((float)TotalRead / (float)DiskFileSize) * 100.0f, '%').c_str());
}
if (DiskFileSize != TotalRead)
{
m_DiskFile.Close();
SetError(MSG_FAIL_IMAGE);
WriteTrace(TraceN64System, TraceError, "Expected to read: 0x%X, read: 0x%X", TotalRead, DiskFileSize);
return false;
}
}
else if (DiskFileSize == SDKFormatSize)
{
//If Disk is SDK format (made with SDK based dumpers like LuigiBlood's, or Nintendo's, size is also constant)
//We need to convert it.
g_Notify->DisplayMessage(5, MSG_LOADING);
//Allocate supported size
if (!AllocateDiskImage(MameFormatSize))
{
m_DiskFile.Close();
return false;
}
ConvertDiskFormat();
}
else
{
//Else the disk file is invalid
m_DiskFile.Close();
WriteTrace(TraceN64System, TraceError, "Disk File is invalid, unexpected size");
return false;
}
g_Notify->DisplayMessage(5, MSG_BYTESWAP);
ByteSwapDisk();
ProtectMemory(m_DiskImage, m_DiskFileSize, MEM_READWRITE);
return true;
}