public static void ProbeTLB()
{
bool FoundEntry = false;
for (uint i = 0; i < TLBEntries.Length; ++i)
{
TLBEntry Entry = TLBEntries[i];
if ((Entry.Valid0 | Entry.Valid1) == 0)
{
continue;
}
uint EntryHi = (uint)Registers.COP0.Reg[Registers.COP0.ENTRYHI_REG];
uint VPN2 = (EntryHi & 0xFFFFE000) >> 13;
uint ASID = EntryHi & 0xFF;
if (Entry.VPN2 == VPN2 && Entry.ASID == ASID)
{
FoundEntry = true;
Registers.COP0.Reg[Registers.COP0.INDEX_REG] = i & 0x3F;
break;
}
}
if (!FoundEntry)
{
throw new Common.Exceptions.TLBMissException("TLB Miss happened while probing the TLB.");
}
}
public static void ReadTLBEntry()
{
TLBEntry Entry = TLBEntries[(uint)Registers.COP0.Reg[Registers.COP0.INDEX_REG] & 0x3F];
Registers.COP0.Reg[Registers.COP0.ENTRYLO0_REG] = (Entry.PFN0 << 6)
| (byte)(Entry.Global0 & 0x1)
| (byte)((Entry.Valid0 & 0x1) << 1)
| (byte)((Entry.Dirty0 & 0x1) << 2)
| (byte)((Entry.PageCoherency0 & 0b111) << 3);
Registers.COP0.Reg[Registers.COP0.ENTRYLO1_REG] = (Entry.PFN1 << 6)
| (byte)(Entry.Global1 & 0x1)
| (byte)((Entry.Valid1 & 0x1) << 1)
| (byte)((Entry.Dirty1 & 0x1) << 2)
| (byte)((Entry.PageCoherency1 & 0b111) << 3);
Registers.COP0.Reg[Registers.COP0.PAGEMASK_REG] = (uint)(Entry.PageMask << 13);
Registers.COP0.Reg[Registers.COP0.ENTRYHI_REG] = (Entry.VPN2 << 13) | Entry.ASID;
}
internal TLBEntryInfo(Int32 index, TLBEntry entry)
{
m_TLBIndex = index;
m_Entry = entry;
}
public TlbModelEntry(Int32 index, TLBEntry entry)
{
m_EntryIndex = index;
m_AssociatedEntry = entry;
}