145 lines
3.0 KiB
C++
145 lines
3.0 KiB
C++
/****************************************************************************
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* *
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* Project 64 - A Nintendo 64 emulator. *
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* http://www.pj64-emu.com/ *
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* Copyright (C) 2012 Project64. All rights reserved. *
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* *
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* License: *
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* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
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* *
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****************************************************************************/
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#pragma once
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class CDebugTlb;
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class CTLB_CB
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{
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public:
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virtual void TLB_Mapped(DWORD VAddr, DWORD Len, DWORD PAddr, bool bReadOnly) = 0;
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virtual void TLB_Unmaped(DWORD VAddr, DWORD Len) = 0;
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virtual void TLB_Changed() = 0;
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};
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class CTLB :
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protected CSystemRegisters
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{
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public:
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struct TLB_ENTRY
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{
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bool EntryDefined;
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union
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{
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unsigned long Value;
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unsigned char A[4];
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struct
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{
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unsigned zero : 13;
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unsigned Mask : 12;
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unsigned zero2 : 7;
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} ;
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} PageMask;
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union
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{
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unsigned long Value;
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unsigned char A[4];
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struct
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{
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unsigned ASID : 8;
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unsigned Zero : 4;
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unsigned G : 1;
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unsigned VPN2 : 19;
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};
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} EntryHi;
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union
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{
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unsigned long Value;
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unsigned char A[4];
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struct
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{
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unsigned GLOBAL: 1;
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unsigned V : 1;
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unsigned D : 1;
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unsigned C : 3;
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unsigned PFN : 20;
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unsigned ZERO: 6;
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} ;
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} EntryLo0;
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union
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{
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unsigned long Value;
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unsigned char A[4];
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struct
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{
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unsigned GLOBAL: 1;
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unsigned V : 1;
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unsigned D : 1;
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unsigned C : 3;
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unsigned PFN : 20;
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unsigned ZERO: 6;
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} ;
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} EntryLo1;
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};
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public:
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CTLB(CTLB_CB * CallBack);
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~CTLB();
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void Reset(bool InvalidateTLB);
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//Used by opcodes of the same name to manipulate the tlb (reads the registers)
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void Probe();
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void ReadEntry();
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void WriteEntry(int index, bool Random);
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//See if a VAddr has an entry to translate to a PAddr
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bool AddressDefined(DWORD VAddr);
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const TLB_ENTRY & TlbEntry(int Entry) const
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{
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return m_tlb[Entry];
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}
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bool PAddrToVAddr(DWORD PAddr, DWORD & VAddr, DWORD & Index);
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void RecordDifference(CLog &LogFile, const CTLB& rTLB);
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bool operator == (const CTLB& rTLB) const;
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bool operator != (const CTLB& rTLB) const;
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private:
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struct FASTTLB
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{
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DWORD VSTART;
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DWORD VEND;
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DWORD PHYSSTART;
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DWORD PHYSEND;
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DWORD Length;
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bool VALID;
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bool DIRTY;
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bool GLOBAL;
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bool ValidEntry;
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bool Random;
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bool Probed;
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};
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friend CDebugTlb; // enable debug window to read class
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CTLB_CB * const m_CB;
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TLB_ENTRY m_tlb[32];
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FASTTLB m_FastTlb[64];
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void SetupTLB_Entry(int index, bool Random);
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};
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