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/* -*- mode: C++; tab-width: 4 -*- */
/* ===================================================================== *\
Copyright (c) 2000-2001 Palm, Inc. or its subsidiaries.
All rights reserved.
This file is part of the Palm OS Emulator.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
\* ===================================================================== */
#ifndef EmCPU68K_h
#define EmCPU68K_h
#include "EmCPU.h" // EmCPU
#include <vector> // vector
#if REGISTER_HISTORY
#include "UAE.h" // regstruct
#else
struct regstruct;
#endif
const uint16 kATrapReturnTrapNum = 0x0C;
/*---------------------------------------------------------------------
* Register numbering for 68K. Each register must have a unique
* non-zero register number.
*--------------------------------------------------------------------*/
enum EmCPU68KRegID
{
e68KRegID_Invalid = 0, /* Zero is an invalid register number */
e68KRegID_D0 = 1,
e68KRegID_D1 = 2,
e68KRegID_D2 = 3,
e68KRegID_D3 = 4,
e68KRegID_D4 = 5,
e68KRegID_D5 = 6,
e68KRegID_D6 = 7,
e68KRegID_D7 = 8,
e68KRegID_A0 = 9,
e68KRegID_A1 = 10,
e68KRegID_A2 = 11,
e68KRegID_A3 = 12,
e68KRegID_A4 = 13,
e68KRegID_A5 = 14,
e68KRegID_A6 = 15,
e68KRegID_USP = 16,
e68KRegID_SSP = 17,
e68KRegID_PC = 18,
e68KRegID_SR = 19
};
enum ExceptionNumber
{
kException_BusErr = 2, // 08 / 2
kException_AddressErr, // 0C / 3
kException_IllegalInstr, // 10 / 4
kException_DivideByZero, // 14 / 5
kException_Chk, // 18 / 6
kException_Trap, // 1C / 7
kException_Privilege, // 20 / 8
kException_Trace, // 24 / 9
kException_ATrap, // 28 / A
kException_FTrap, // 2C / B
kException_Reseved12, // 30 / C
kException_Coproc, // 34 / D
kException_FormatErr, // 38 / E
kException_UninitializedInt, // 3C / F
kException_Reserved0, // 40-5C / 10-17
kException_Reserved1,
kException_Reserved2,
kException_Reserved3,
kException_Reserved4,
kException_Reserved5,
kException_Reserved6,
kException_Reserved7,
kException_SpuriousInt, // 60 / 18
kException_AutoVec1, // 64 / 19
kException_AutoVec2, // 68 / 1A
kException_AutoVec3, // 6C / 1B
kException_AutoVec4, // 70 / 1C
kException_AutoVec5, // 74 / 1D
kException_AutoVec6, // 78 / 1E
kException_AutoVec7, // 7C / 1F
kException_Trap0, // 80 - BC / 20 - 2F // For soft breakpoints
kException_Trap1,
kException_Trap2,
kException_Trap3,
kException_Trap4,
kException_Trap5,
kException_Trap6,
kException_Trap7,
kException_Trap8, // For compiled breakpoints
kException_Trap9,
kException_Trap10,
kException_Trap11,
kException_Trap12,
kException_Trap13, // ATrap returns (emulator convention)
kException_Trap14,
kException_Trap15, // Trap dispatcher
kException_Unassigned0, // C0 - FC / 30 - 3F
kException_Unassigned1,
kException_Unassigned2,
kException_Unassigned3,
kException_Unassigned4,
kException_Unassigned5,
kException_Unassigned6,
kException_Unassigned7,
kException_Unassigned8,
kException_Unassigned9,
kException_Unassigned10,
kException_Unassigned11,
kException_Unassigned12,
kException_Unassigned13,
kException_Unassigned14,
kException_Unassigned15,
kException_LastException,
kException_SoftBreak = kException_Trap0 + sysDbgBreakpointTrapNum,
kException_HardBreak = kException_Trap0 + sysDbgTrapNum,
kException_SysCall = kException_Trap0 + sysDispatchTrapNum,
kException_ATrapReturn = kException_Trap0 + kATrapReturnTrapNum
};
/*
Grr...this function doesn't appear to be "seen" by VC++. Even in its
presence, an expression involving an ExceptionNumber and an int
results in the message "error C2440: 'initializing' : cannot convert
from 'const int' to 'const enum ExceptionNumber'"
inline ExceptionNumber operator+ (ExceptionNumber left, int right)
{
// NB: cast "left" to an integer, or this routine will recurse!
return (ExceptionNumber) ((int) left + right);
}
*/
#if EXCEPTION_HISTORY
struct ExceptionHistoryType
{
const char* name;
uint32 pc;
uint32 sp;
};
#endif
// Using uint32 instead of uint16 generates slightly better code.
typedef uint32 EmOpcode68K;
enum EmStackChangeType
{
kStackPointerChanged,
kStackPointerIncremented,
kStackPointerDecremented,
kStackPointerKernelStackHack
};
class EmCPU68K;
typedef Bool (*Hook68KException) (ExceptionNumber);
typedef Bool (*Hook68KJSR) (emuptr oldPC, emuptr dest);
typedef Bool (*Hook68KJSR_Ind) (emuptr oldPC, emuptr dest);
typedef void (*Hook68KLINK) (int linkSize);
typedef Bool (*Hook68KRTE) (emuptr dest);
typedef Bool (*Hook68KRTS) (emuptr dest);
typedef void (*Hook68KNewPC) (emuptr dest);
typedef void (*Hook68KNewSP) (EmStackChangeType);
typedef vector<Hook68KException> Hook68KExceptionList;
typedef vector<Hook68KJSR> Hook68KJSRList;
typedef vector<Hook68KJSR_Ind> Hook68KJSR_IndList;
typedef vector<Hook68KLINK> Hook68KLINKList;
typedef vector<Hook68KRTE> Hook68KRTEList;
typedef vector<Hook68KRTS> Hook68KRTSList;
typedef vector<Hook68KNewPC> Hook68KNewPCList;
typedef vector<Hook68KNewSP> Hook68KNewSPList;
class EmCPU68K;
extern EmCPU68K* gCPU68K;
// These variables should strictly be in a sub-system that implements
// the stack overflow checking, etc. However, for performance reasons,
// we need to expose them to UAE (see the CHECK_STACK_POINTER_ASSIGNMENT,
// et al macros), so define them here.
//
// Similar comments for the CheckKernelStack function.
extern "C" uint32 gStackHigh;
extern "C" uint32 gStackLowWarn;
extern "C" uint32 gStackLow;
extern "C" uint32 gKernelStackOverflowed;
class EmCPU68K : public EmCPU
{
public:
// -----------------------------------------------------------------------------
// constructor / destructor
// -----------------------------------------------------------------------------
EmCPU68K (EmSession*);
virtual ~EmCPU68K (void);
// -----------------------------------------------------------------------------
// public methods
// -----------------------------------------------------------------------------
// Standard sub-system methods:
// Reset: Resets the state. Called on hardware resets or on
// calls to SysReset. Also called from constructor.
// Save: Saves the state to the given file.
// Load: Loads the state from the given file. Can assume that
// Reset has been called first.
virtual void Reset (Bool hardwareReset);
virtual void Save (SessionFile&);
virtual void Load (SessionFile&);
// Execute the main CPU loop until asked to stop.
virtual void Execute (void);
virtual void CheckAfterCycle (void);
// Low-level access to CPU state.
virtual emuptr GetPC (void);
virtual emuptr GetSP (void);
virtual uint32 GetRegister (int);
virtual void SetPC (emuptr);
virtual void SetSP (emuptr);
virtual void SetRegister (int, uint32);
virtual Bool Stopped (void);
// Called from routines in EmUAEGlue.cpp
void ProcessException (ExceptionNumber);
void ProcessIllegalInstruction (EmOpcode68K opcode);
int ProcessJSR (emuptr oldPC, emuptr dest);
int ProcessJSR_Ind (emuptr oldPC, emuptr dest);
void ProcessLINK (int linkSize);
int ProcessRTE (emuptr dest);
int ProcessRTS (emuptr dest);
void CheckNewPC (emuptr dest);
void CheckNewSP (EmStackChangeType);
// Called by CPU clients who need to be notified when certain
// actions occur.
void InstallHookException (ExceptionNumber,
Hook68KException);
void InstallHookJSR (Hook68KJSR);
void InstallHookJSR_Ind (Hook68KJSR_Ind);
void InstallHookLINK (Hook68KLINK);
void InstallHookRTS (Hook68KRTE);
void InstallHookRTE (Hook68KRTS);
void InstallHookNewPC (Hook68KNewPC);
void InstallHookNewSP (Hook68KNewSP);
void RemoveHookException (ExceptionNumber,
Hook68KException);
void RemoveHookJSR (Hook68KJSR);
void RemoveHookJSR_Ind (Hook68KJSR_Ind);
void RemoveHookLINK (Hook68KLINK);
void RemoveHookRTS (Hook68KRTE);
void RemoveHookRTE (Hook68KRTS);
void RemoveHookNewPC (Hook68KNewPC);
void RemoveHookNewSP (Hook68KNewSP);
// Register management. Clients should call Get/SetRegisters for
// the most part. UpdateXFromY are here so that MakeSR and
// MakeFromSR (UAE glue functions) can call them.
void GetRegisters (regstruct& registers);
void SetRegisters (regstruct& registers);
void UpdateSRFromRegisters (void);
void UpdateRegistersFromSR (void);
uint32 GetCycleCount (void);
void BusError (emuptr address, long size, Bool forRead);
void AddressError (emuptr address, long size, Bool forRead);
private:
Bool ExecuteSpecial (void);
Bool ExecuteStoppedLoop (void);
void CycleSlowly (Bool sleeping);
Bool CheckForBreak (void);
void ProcessInterrupt (int32 interrupt);
void InitializeUAETables (void);
private:
emuptr fLastTraceAddress;
uint32 fCycleCount;
Hook68KExceptionList fExceptionHandlers[kException_LastException];
Hook68KJSRList fHookJSR;
Hook68KJSR_IndList fHookJSR_Ind;
Hook68KLINKList fHookLINK;
Hook68KRTEList fHookRTE;
Hook68KRTSList fHookRTS;
Hook68KNewPCList fHookNewPC;
Hook68KNewSPList fHookNewSP;
#if REGISTER_HISTORY
#define kRegHistorySize 512
long fRegHistoryIndex;
struct regstruct fRegHistory[kRegHistorySize];
#endif
#if EXCEPTION_HISTORY
#define kExceptionHistorySize 512
long fExceptionHistoryIndex;
struct ExceptionHistoryType fExceptionHistory[kExceptionHistorySize];
#endif
};
#endif // EmCPU68K_h
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