armemu.h

这个是LINUX下的GDB调度工具的源码

  do							\
    {							\
      if (state->is_v4)					\
	BUSUSEDN;					\
      else						\
	{						\
	  /* A standard PC inc and an N cycle.  */	\
	  state->Reg[15] += isize;			\
	  state->NextInstr |= 3;			\
	}						\
    }							\
  while (0)

#define INCPC 			\
  do				\
    {				\
      /* A standard PC inc.  */	\
      state->Reg[15] += isize;	\
      state->NextInstr |= 2;	\
    }				\
  while (0)

#define FLUSHPIPE state->NextInstr |= PRIMEPIPE

/* Cycle based emulation.  */

#define OUTPUTCP(i,a,b)
#define NCYCLE
#define SCYCLE
#define ICYCLE
#define CCYCLE
#define NEXTCYCLE(c)

/* Macros to extract parts of instructions.  */
#define DESTReg (BITS (12, 15))
#define LHSReg  (BITS (16, 19))
#define RHSReg  (BITS ( 0,  3))

#define DEST (state->Reg[DESTReg])

#ifdef MODE32
#ifdef MODET
#define LHS ((LHSReg == 15) ? (state->Reg[15] & 0xFFFFFFFC): (state->Reg[LHSReg]))
#else
#define LHS (state->Reg[LHSReg])
#endif
#else
#define LHS ((LHSReg == 15) ? R15PC : (state->Reg[LHSReg]))
#endif

#define MULDESTReg (BITS (16, 19))
#define MULLHSReg  (BITS ( 0,  3))
#define MULRHSReg  (BITS ( 8, 11))
#define MULACCReg  (BITS (12, 15))

#define DPImmRHS (ARMul_ImmedTable[BITS(0, 11)])
#define DPSImmRHS temp = BITS(0,11) ; \
                  rhs = ARMul_ImmedTable[temp] ; \
                  if (temp > 255) /* There was a shift.  */ \
                     ASSIGNC (rhs >> 31) ;

#ifdef MODE32
#define DPRegRHS  ((BITS (4,11) == 0) ? state->Reg[RHSReg] \
                                      : GetDPRegRHS (state, instr))
#define DPSRegRHS ((BITS (4,11) == 0) ? state->Reg[RHSReg] \
                                      : GetDPSRegRHS (state, instr))
#else
#define DPRegRHS  ((BITS (0, 11) < 15) ? state->Reg[RHSReg] \
                                       : GetDPRegRHS (state, instr))
#define DPSRegRHS ((BITS (0, 11) < 15) ? state->Reg[RHSReg] \
                                       : GetDPSRegRHS (state, instr))
#endif

#define LSBase state->Reg[LHSReg]
#define LSImmRHS (BITS(0,11))

#ifdef MODE32
#define LSRegRHS ((BITS (4, 11) == 0) ? state->Reg[RHSReg] \
                                      : GetLSRegRHS (state, instr))
#else
#define LSRegRHS ((BITS (0, 11) < 15) ? state->Reg[RHSReg] \
                                      : GetLSRegRHS (state, instr))
#endif

#define LSMNumRegs ((ARMword) ARMul_BitList[BITS (0, 7)] + \
                    (ARMword) ARMul_BitList[BITS (8, 15)] )
#define LSMBaseFirst ((LHSReg == 0 && BIT (0)) || \
                      (BIT (LHSReg) && BITS (0, LHSReg - 1) == 0))

#define SWAPSRC (state->Reg[RHSReg])

#define LSCOff (BITS (0, 7) << 2)
#define CPNum   BITS (8, 11)

/* Determine if access to coprocessor CP is permitted.
   The XScale has a register in CP15 which controls access to CP0 - CP13.  */
#define CP_ACCESS_ALLOWED(STATE, CP)			\
    (   ((CP) >= 14)					\
     || (! (STATE)->is_XScale)				\
     || (read_cp15_reg (15, 0, 1) & (1 << (CP))))

/* Macro to rotate n right by b bits.  */
#define ROTATER(n, b) (((n) >> (b)) | ((n) << (32 - (b))))

/* Macros to store results of instructions.  */
#define WRITEDEST(d)				\
  do						\
    {						\
      if (DESTReg == 15) 			\
	WriteR15 (state, d); 			\
      else 					\
	DEST = d;				\
    }						\
  while (0)

#define WRITESDEST(d)				\
  do						\
    {						\
      if (DESTReg == 15)			\
	WriteSR15 (state, d);			\
      else					\
	{					\
	  DEST = d;				\
	  ARMul_NegZero (state, d);		\
	}					\
    }						\
  while (0)

#define WRITEDESTB(d)				\
  do						\
    {						\
      if (DESTReg == 15)			\
	WriteR15Branch (state, d);		\
      else					\
	DEST = d;				\
    }						\
  while (0)

#define BYTETOBUS(data) ((data & 0xff) | \
                        ((data & 0xff) << 8) | \
                        ((data & 0xff) << 16) | \
                        ((data & 0xff) << 24))

#define BUSTOBYTE(address, data)				\
  do								\
    {								\
      if (state->bigendSig) 					\
	temp = (data >> (((address ^ 3) & 3) << 3)) & 0xff;	\
      else							\
	temp = (data >> ((address & 3) << 3)) & 0xff;		\
    }								\
  while (0)

#define LOADMULT(instr,   address, wb)  LoadMult   (state, instr, address, wb)
#define LOADSMULT(instr,  address, wb)  LoadSMult  (state, instr, address, wb)
#define STOREMULT(instr,  address, wb)  StoreMult  (state, instr, address, wb)
#define STORESMULT(instr, address, wb)  StoreSMult (state, instr, address, wb)

#define POSBRANCH ((instr & 0x7fffff) << 2)
#define NEGBRANCH ((0xff000000 |(instr & 0xffffff)) << 2)


/* Values for Emulate.  */
#define STOP            0	/* stop */
#define CHANGEMODE      1	/* change mode */
#define ONCE            2	/* execute just one interation */
#define RUN             3	/* continuous execution */

/* Stuff that is shared across modes.  */
extern unsigned ARMul_MultTable[];	/* Number of I cycles for a mult.  */
extern ARMword  ARMul_ImmedTable[];	/* Immediate DP LHS values.  */
extern char     ARMul_BitList[];	/* Number of bits in a byte table.  */

#define EVENTLISTSIZE 1024L

/* Thumb support.  */
typedef enum
{
  t_undefined,		/* Undefined Thumb instruction.  */
  t_decoded,		/* Instruction decoded to ARM equivalent.  */
  t_branch		/* Thumb branch (already processed).  */
}
tdstate;

/* Macros to scrutinize instructions.  */
#define UNDEF_Test
#define UNDEF_Shift
#define UNDEF_MSRPC
#define UNDEF_MRSPC
#define UNDEF_MULPCDest
#define UNDEF_MULDestEQOp1
#define UNDEF_LSRBPC
#define UNDEF_LSRBaseEQOffWb
#define UNDEF_LSRBaseEQDestWb
#define UNDEF_LSRPCBaseWb
#define UNDEF_LSRPCOffWb
#define UNDEF_LSMNoRegs
#define UNDEF_LSMPCBase
#define UNDEF_LSMUserBankWb
#define UNDEF_LSMBaseInListWb
#define UNDEF_SWPPC
#define UNDEF_CoProHS
#define UNDEF_MCRPC
#define UNDEF_LSCPCBaseWb
#define UNDEF_UndefNotBounced
#define UNDEF_ShortInt
#define UNDEF_IllegalMode
#define UNDEF_Prog32SigChange
#define UNDEF_Data32SigChange

/* Prototypes for exported functions.  */
extern unsigned ARMul_NthReg        (ARMword, unsigned);
extern int      AddOverflow         (ARMword, ARMword, ARMword);
extern int      SubOverflow         (ARMword, ARMword, ARMword);
extern ARMword  ARMul_Emulate26     (ARMul_State *);
extern ARMword  ARMul_Emulate32     (ARMul_State *);
extern unsigned IntPending          (ARMul_State *);
extern void     ARMul_CPSRAltered   (ARMul_State *);
extern void     ARMul_R15Altered    (ARMul_State *);
extern ARMword  ARMul_GetPC         (ARMul_State *);
extern ARMword  ARMul_GetNextPC     (ARMul_State *);
extern ARMword  ARMul_GetR15        (ARMul_State *);
extern ARMword  ARMul_GetCPSR       (ARMul_State *);
extern void     ARMul_EnvokeEvent   (ARMul_State *);
extern unsigned long ARMul_Time     (ARMul_State *);
extern void     ARMul_NegZero       (ARMul_State *, ARMword);
extern void     ARMul_SetPC         (ARMul_State *, ARMword);
extern void     ARMul_SetR15        (ARMul_State *, ARMword);
extern void     ARMul_SetCPSR       (ARMul_State *, ARMword);
extern ARMword  ARMul_GetSPSR       (ARMul_State *, ARMword);
extern void     ARMul_Abort26       (ARMul_State *, ARMword);
extern void     ARMul_Abort32       (ARMul_State *, ARMword);
extern ARMword  ARMul_MRC           (ARMul_State *, ARMword);
extern void     ARMul_CDP           (ARMul_State *, ARMword);
extern void     ARMul_LDC           (ARMul_State *, ARMword, ARMword);
extern void     ARMul_STC           (ARMul_State *, ARMword, ARMword);
extern void     ARMul_MCR           (ARMul_State *, ARMword, ARMword);
extern void     ARMul_SetSPSR       (ARMul_State *, ARMword, ARMword);
extern ARMword  ARMul_SwitchMode    (ARMul_State *, ARMword, ARMword);
extern ARMword  ARMul_Align         (ARMul_State *, ARMword, ARMword);
extern ARMword  ARMul_SwitchMode    (ARMul_State *, ARMword, ARMword);
extern void     ARMul_MSRCpsr       (ARMul_State *, ARMword, ARMword);
extern void     ARMul_SubOverflow   (ARMul_State *, ARMword, ARMword, ARMword);
extern void     ARMul_AddOverflow   (ARMul_State *, ARMword, ARMword, ARMword);
extern void     ARMul_SubCarry      (ARMul_State *, ARMword, ARMword, ARMword);
extern void     ARMul_AddCarry      (ARMul_State *, ARMword, ARMword, ARMword);
extern tdstate  ARMul_ThumbDecode   (ARMul_State *, ARMword, ARMword, ARMword *);
extern ARMword  ARMul_GetReg        (ARMul_State *, unsigned, unsigned);
extern void     ARMul_SetReg        (ARMul_State *, unsigned, unsigned, ARMword);
extern void     ARMul_ScheduleEvent (ARMul_State *, unsigned long, unsigned (*) (ARMul_State *));
/* Coprocessor support functions.  */
extern unsigned ARMul_CoProInit     (ARMul_State *);
extern void     ARMul_CoProExit     (ARMul_State *);
extern void     ARMul_CoProAttach   (ARMul_State *, unsigned, ARMul_CPInits *, ARMul_CPExits *,
				     ARMul_LDCs *, ARMul_STCs *, ARMul_MRCs *, ARMul_MCRs *,
				     ARMul_CDPs *, ARMul_CPReads *, ARMul_CPWrites *);
extern void     ARMul_CoProDetach   (ARMul_State *, unsigned);
extern ARMword  read_cp15_reg       (unsigned, unsigned, unsigned);

extern unsigned DSPLDC4 (ARMul_State *, unsigned, ARMword, ARMword);
extern unsigned DSPMCR4 (ARMul_State *, unsigned, ARMword, ARMword);
extern unsigned DSPMRC4 (ARMul_State *, unsigned, ARMword, ARMword *);
extern unsigned	DSPSTC4 (ARMul_State *, unsigned, ARMword, ARMword *);
extern unsigned	DSPCDP4 (ARMul_State *, unsigned, ARMword);
extern unsigned DSPMCR5 (ARMul_State *, unsigned, ARMword, ARMword);
extern unsigned DSPMRC5 (ARMul_State *, unsigned, ARMword, ARMword *);
extern unsigned DSPLDC5 (ARMul_State *, unsigned, ARMword, ARMword);
extern unsigned	DSPSTC5 (ARMul_State *, unsigned, ARMword, ARMword *);
extern unsigned	DSPCDP5 (ARMul_State *, unsigned, ARMword);
extern unsigned DSPMCR6 (ARMul_State *, unsigned, ARMword, ARMword);
extern unsigned DSPMRC6 (ARMul_State *, unsigned, ARMword, ARMword *);
extern unsigned	DSPCDP6 (ARMul_State *, unsigned, ARMword);