[deliverable/binutils-gdb.git] / sim / arm / armemu.h

/*  armemu.h -- ARMulator emulation macros:  ARM6 Instruction Emulator.
    Copyright (C) 1994 Advanced RISC Machines Ltd.
 
    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.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */

extern ARMword isize;

/* Condition code values.  */
#define EQ 0
#define NE 1
#define CS 2
#define CC 3
#define MI 4
#define PL 5
#define VS 6
#define VC 7
#define HI 8
#define LS 9
#define GE 10
#define LT 11
#define GT 12
#define LE 13
#define AL 14
#define NV 15

/* Shift Opcodes.  */
#define LSL 0
#define LSR 1
#define ASR 2
#define ROR 3

/* Macros to twiddle the status flags and mode.  */
#define NBIT ((unsigned)1L << 31)
#define ZBIT (1L << 30)
#define CBIT (1L << 29)
#define VBIT (1L << 28)
#define SBIT (1L << 27)
#define IBIT (1L << 7)
#define FBIT (1L << 6)
#define IFBITS (3L << 6)
#define R15IBIT (1L << 27)
#define R15FBIT (1L << 26)
#define R15IFBITS (3L << 26)

#define POS(i) ( (~(i)) >> 31 )
#define NEG(i) ( (i) >> 31 )

#ifdef MODET			/* Thumb support.  */
/* ??? This bit is actually in the low order bit of the PC in the hardware.
   It isn't clear if the simulator needs to model that or not.  */
#define TBIT (1L << 5)
#define TFLAG state->TFlag
#define SETT state->TFlag = 1
#define CLEART state->TFlag = 0
#define ASSIGNT(res) state->TFlag = res
#define INSN_SIZE (TFLAG ? 2 : 4)
#else
#define INSN_SIZE 4
#endif

#define NFLAG state->NFlag
#define SETN state->NFlag = 1
#define CLEARN state->NFlag = 0
#define ASSIGNN(res) state->NFlag = res

#define ZFLAG state->ZFlag
#define SETZ state->ZFlag = 1
#define CLEARZ state->ZFlag = 0
#define ASSIGNZ(res) state->ZFlag = res

#define CFLAG state->CFlag
#define SETC state->CFlag = 1
#define CLEARC state->CFlag = 0
#define ASSIGNC(res) state->CFlag = res

#define VFLAG state->VFlag
#define SETV state->VFlag = 1
#define CLEARV state->VFlag = 0
#define ASSIGNV(res) state->VFlag = res

#define SFLAG state->SFlag
#define SETS state->SFlag = 1
#define CLEARS state->SFlag = 0
#define ASSIGNS(res) state->SFlag = res

#define IFLAG (state->IFFlags >> 1)
#define FFLAG (state->IFFlags & 1)
#define IFFLAGS state->IFFlags
#define ASSIGNINT(res) state->IFFlags = (((res) >> 6) & 3)
#define ASSIGNR15INT(res) state->IFFlags = (((res) >> 26) & 3) ;

#define PSR_FBITS (0xff000000L)
#define PSR_SBITS (0x00ff0000L)
#define PSR_XBITS (0x0000ff00L)
#define PSR_CBITS (0x000000ffL)

#if defined MODE32 || defined MODET
#define CCBITS (0xf8000000L)
#else
#define CCBITS (0xf0000000L)
#endif

#define INTBITS (0xc0L)

#if defined MODET && defined MODE32
#define PCBITS (0xffffffffL)
#else
#define PCBITS (0xfffffffcL)
#endif

#define MODEBITS (0x1fL)
#define R15INTBITS (3L << 26)

#if defined MODET && defined MODE32
#define R15PCBITS (0x03ffffffL)
#else
#define R15PCBITS (0x03fffffcL)
#endif

#define R15PCMODEBITS (0x03ffffffL)
#define R15MODEBITS (0x3L)

#ifdef MODE32
#define PCMASK PCBITS
#define PCWRAP(pc) (pc)
#else
#define PCMASK R15PCBITS
#define PCWRAP(pc) ((pc) & R15PCBITS)
#endif

#define PC (state->Reg[15] & PCMASK)
#define R15CCINTMODE (state->Reg[15] & (CCBITS | R15INTBITS | R15MODEBITS))
#define R15INT (state->Reg[15] & R15INTBITS)
#define R15INTPC (state->Reg[15] & (R15INTBITS | R15PCBITS))
#define R15INTPCMODE (state->Reg[15] & (R15INTBITS | R15PCBITS | R15MODEBITS))
#define R15INTMODE (state->Reg[15] & (R15INTBITS | R15MODEBITS))
#define R15PC (state->Reg[15] & R15PCBITS)
#define R15PCMODE (state->Reg[15] & (R15PCBITS | R15MODEBITS))
#define R15MODE (state->Reg[15] & R15MODEBITS)

#define ECC ((NFLAG << 31) | (ZFLAG << 30) | (CFLAG << 29) | (VFLAG << 28) | (SFLAG << 27))
#define EINT (IFFLAGS << 6)
#define ER15INT (IFFLAGS << 26)
#define EMODE (state->Mode)

#ifdef MODET
#define CPSR (ECC | EINT | EMODE | (TFLAG << 5))
#else
#define CPSR (ECC | EINT | EMODE)
#endif

#ifdef MODE32
#define PATCHR15
#else
#define PATCHR15 state->Reg[15] = ECC | ER15INT | EMODE | R15PC
#endif

#define GETSPSR(bank) (ARMul_GetSPSR (state, EMODE))
#define SETPSR_F(d,s) d = ((d) & ~PSR_FBITS) | ((s) & PSR_FBITS)
#define SETPSR_S(d,s) d = ((d) & ~PSR_SBITS) | ((s) & PSR_SBITS)
#define SETPSR_X(d,s) d = ((d) & ~PSR_XBITS) | ((s) & PSR_XBITS)
#define SETPSR_C(d,s) d = ((d) & ~PSR_CBITS) | ((s) & PSR_CBITS)

#define SETR15PSR(s) 								\
  do										\
    {										\
      if (state->Mode == USER26MODE)						\
        {									\
          state->Reg[15] = ((s) & CCBITS) | R15PC | ER15INT | EMODE;		\
          ASSIGNN ((state->Reg[15] & NBIT) != 0);				\
          ASSIGNZ ((state->Reg[15] & ZBIT) != 0);				\
          ASSIGNC ((state->Reg[15] & CBIT) != 0);				\
          ASSIGNV ((state->Reg[15] & VBIT) != 0);				\
        }									\
      else									\
        {									\
          state->Reg[15] = R15PC | ((s) & (CCBITS | R15INTBITS | R15MODEBITS));	\
          ARMul_R15Altered (state);						\
       }									\
    }										\
  while (0)
     
#define SETABORT(i, m, d)						\
  do									\
    { 									\
      int SETABORT_mode = (m);						\
									\
      ARMul_SetSPSR (state, SETABORT_mode, ARMul_GetCPSR (state));	\
      ARMul_SetCPSR (state, ((ARMul_GetCPSR (state) & ~(EMODE | TBIT))	\
			     | (i) | SETABORT_mode));			\
      state->Reg[14] = temp - (d);					\
    }									\
  while (0)

#ifndef MODE32
#define VECTORS 0x20
#define LEGALADDR 0x03ffffff
#define VECTORACCESS(address) (address < VECTORS && ARMul_MODE26BIT && state->prog32Sig)
#define ADDREXCEPT(address)   (address > LEGALADDR && !state->data32Sig)
#endif

#define INTERNALABORT(address)			\
  do						\
    {						\
      if (address < VECTORS)			\
	state->Aborted = ARMul_DataAbortV;	\
      else					\
	state->Aborted = ARMul_AddrExceptnV;	\
    }						\
  while (0)

#ifdef MODE32
#define TAKEABORT ARMul_Abort (state, ARMul_DataAbortV)
#else
#define TAKEABORT 					\
  do							\
    {							\
      if (state->Aborted == ARMul_AddrExceptnV) 	\
	ARMul_Abort (state, ARMul_AddrExceptnV); 	\
      else 						\
	ARMul_Abort (state, ARMul_DataAbortV);		\
    }							\
  while (0)
#endif

#define CPTAKEABORT					\
  do							\
    {							\
      if (!state->Aborted)				\
	ARMul_Abort (state, ARMul_UndefinedInstrV); 	\
      else if (state->Aborted == ARMul_AddrExceptnV) 	\
	ARMul_Abort (state, ARMul_AddrExceptnV); 	\
      else 						\
	ARMul_Abort (state, ARMul_DataAbortV);		\
    }							\
  while (0);


/* Different ways to start the next instruction.  */
#define SEQ           0
#define NONSEQ        1
#define PCINCEDSEQ    2
#define PCINCEDNONSEQ 3
#define PRIMEPIPE     4
#define RESUME        8

#define NORMALCYCLE state->NextInstr = 0
#define BUSUSEDN    state->NextInstr |= 1  /* The next fetch will be an N cycle.  */
#define BUSUSEDINCPCS						\
  do								\
    {								\
      if (! state->is_v4)					\
        {							\
	  /* A standard PC inc and an S cycle.  */		\
	  state->Reg[15] += isize;				\
	  state->NextInstr = (state->NextInstr & 0xff) | 2;	\
	}							\
    }								\
  while (0)

#define BUSUSEDINCPCN					\
  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);
Commit	Line	Data
c906108c SS	1	/* armemu.h -- ARMulator emulation macros: ARM6 Instruction Emulator.
	2	Copyright (C) 1994 Advanced RISC Machines Ltd.
	3
	4	This program is free software; you can redistribute it and/or modify
	5	it under the terms of the GNU General Public License as published by
	6	the Free Software Foundation; either version 2 of the License, or
	7	(at your option) any later version.
	8
	9	This program is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	GNU General Public License for more details.
	13
	14	You should have received a copy of the GNU General Public License
	15	along with this program; if not, write to the Free Software
	16	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	17
	18	extern ARMword isize;
	19
ff44f8e3	20	/* Condition code values. */
c906108c SS	21	#define EQ 0
	22	#define NE 1
	23	#define CS 2
	24	#define CC 3
	25	#define MI 4
	26	#define PL 5
	27	#define VS 6
	28	#define VC 7
	29	#define HI 8
	30	#define LS 9
	31	#define GE 10
	32	#define LT 11
	33	#define GT 12
	34	#define LE 13
	35	#define AL 14
	36	#define NV 15
	37
ff44f8e3	38	/* Shift Opcodes. */
c906108c SS	39	#define LSL 0
	40	#define LSR 1
	41	#define ASR 2
	42	#define ROR 3
	43
ff44f8e3	44	/* Macros to twiddle the status flags and mode. */
c906108c SS	45	#define NBIT ((unsigned)1L << 31)
	46	#define ZBIT (1L << 30)
	47	#define CBIT (1L << 29)
	48	#define VBIT (1L << 28)
f1129fb8	49	#define SBIT (1L << 27)
c906108c SS	50	#define IBIT (1L << 7)
	51	#define FBIT (1L << 6)
	52	#define IFBITS (3L << 6)
	53	#define R15IBIT (1L << 27)
	54	#define R15FBIT (1L << 26)
	55	#define R15IFBITS (3L << 26)
	56
	57	#define POS(i) ( (~(i)) >> 31 )
	58	#define NEG(i) ( (i) >> 31 )
	59
ff44f8e3	60	#ifdef MODET /* Thumb support. */
c906108c SS	61	/* ??? This bit is actually in the low order bit of the PC in the hardware.
	62	It isn't clear if the simulator needs to model that or not. */
	63	#define TBIT (1L << 5)
	64	#define TFLAG state->TFlag
	65	#define SETT state->TFlag = 1
	66	#define CLEART state->TFlag = 0
	67	#define ASSIGNT(res) state->TFlag = res
e063aa3b AO	68	#define INSN_SIZE (TFLAG ? 2 : 4)
	69	#else
	70	#define INSN_SIZE 4
c906108c SS	71	#endif
	72
	73	#define NFLAG state->NFlag
	74	#define SETN state->NFlag = 1
	75	#define CLEARN state->NFlag = 0
	76	#define ASSIGNN(res) state->NFlag = res
	77
	78	#define ZFLAG state->ZFlag
	79	#define SETZ state->ZFlag = 1
	80	#define CLEARZ state->ZFlag = 0
	81	#define ASSIGNZ(res) state->ZFlag = res
	82
	83	#define CFLAG state->CFlag
	84	#define SETC state->CFlag = 1
	85	#define CLEARC state->CFlag = 0
	86	#define ASSIGNC(res) state->CFlag = res
	87
	88	#define VFLAG state->VFlag
	89	#define SETV state->VFlag = 1
	90	#define CLEARV state->VFlag = 0
	91	#define ASSIGNV(res) state->VFlag = res
	92
f1129fb8 NC	93	#define SFLAG state->SFlag
	94	#define SETS state->SFlag = 1
	95	#define CLEARS state->SFlag = 0
	96	#define ASSIGNS(res) state->SFlag = res
f743149e	97
c906108c SS	98	#define IFLAG (state->IFFlags >> 1)
	99	#define FFLAG (state->IFFlags & 1)
	100	#define IFFLAGS state->IFFlags
	101	#define ASSIGNINT(res) state->IFFlags = (((res) >> 6) & 3)
	102	#define ASSIGNR15INT(res) state->IFFlags = (((res) >> 26) & 3) ;
	103
4ef2594f AO	104	#define PSR_FBITS (0xff000000L)
	105	#define PSR_SBITS (0x00ff0000L)
	106	#define PSR_XBITS (0x0000ff00L)
	107	#define PSR_CBITS (0x000000ffL)
	108
f1129fb8 NC	109	#if defined MODE32 \|\| defined MODET
	110	#define CCBITS (0xf8000000L)
	111	#else
c906108c	112	#define CCBITS (0xf0000000L)
f1129fb8 NC	113	#endif
f1129fb8 NC	114
c906108c SS	115	#define INTBITS (0xc0L)
	116
	117	#if defined MODET && defined MODE32
	118	#define PCBITS (0xffffffffL)
	119	#else
	120	#define PCBITS (0xfffffffcL)
	121	#endif
	122
	123	#define MODEBITS (0x1fL)
	124	#define R15INTBITS (3L << 26)
	125
	126	#if defined MODET && defined MODE32
	127	#define R15PCBITS (0x03ffffffL)
	128	#else
	129	#define R15PCBITS (0x03fffffcL)
	130	#endif
	131
	132	#define R15PCMODEBITS (0x03ffffffL)
	133	#define R15MODEBITS (0x3L)
	134
	135	#ifdef MODE32
	136	#define PCMASK PCBITS
	137	#define PCWRAP(pc) (pc)
	138	#else
	139	#define PCMASK R15PCBITS
	140	#define PCWRAP(pc) ((pc) & R15PCBITS)
	141	#endif
	142
	143	#define PC (state->Reg[15] & PCMASK)
	144	#define R15CCINTMODE (state->Reg[15] & (CCBITS \| R15INTBITS \| R15MODEBITS))
	145	#define R15INT (state->Reg[15] & R15INTBITS)
	146	#define R15INTPC (state->Reg[15] & (R15INTBITS \| R15PCBITS))
	147	#define R15INTPCMODE (state->Reg[15] & (R15INTBITS \| R15PCBITS \| R15MODEBITS))
	148	#define R15INTMODE (state->Reg[15] & (R15INTBITS \| R15MODEBITS))
	149	#define R15PC (state->Reg[15] & R15PCBITS)
	150	#define R15PCMODE (state->Reg[15] & (R15PCBITS \| R15MODEBITS))
	151	#define R15MODE (state->Reg[15] & R15MODEBITS)
	152
f1129fb8	153	#define ECC ((NFLAG << 31) \| (ZFLAG << 30) \| (CFLAG << 29) \| (VFLAG << 28) \| (SFLAG << 27))
c906108c SS	154	#define EINT (IFFLAGS << 6)
	155	#define ER15INT (IFFLAGS << 26)
	156	#define EMODE (state->Mode)
	157
	158	#ifdef MODET
	159	#define CPSR (ECC \| EINT \| EMODE \| (TFLAG << 5))
	160	#else
	161	#define CPSR (ECC \| EINT \| EMODE)
	162	#endif
	163
	164	#ifdef MODE32
	165	#define PATCHR15
	166	#else
	167	#define PATCHR15 state->Reg[15] = ECC \| ER15INT \| EMODE \| R15PC
	168	#endif
	169
cf52c765	170	#define GETSPSR(bank) (ARMul_GetSPSR (state, EMODE))
4ef2594f AO	171	#define SETPSR_F(d,s) d = ((d) & ~PSR_FBITS) \| ((s) & PSR_FBITS)
	172	#define SETPSR_S(d,s) d = ((d) & ~PSR_SBITS) \| ((s) & PSR_SBITS)
	173	#define SETPSR_X(d,s) d = ((d) & ~PSR_XBITS) \| ((s) & PSR_XBITS)
	174	#define SETPSR_C(d,s) d = ((d) & ~PSR_CBITS) \| ((s) & PSR_CBITS)
ff44f8e3 NC	175
	176	#define SETR15PSR(s) \
	177	do \
	178	{ \
	179	if (state->Mode == USER26MODE) \
	180	{ \
	181	state->Reg[15] = ((s) & CCBITS) \| R15PC \| ER15INT \| EMODE; \
	182	ASSIGNN ((state->Reg[15] & NBIT) != 0); \
	183	ASSIGNZ ((state->Reg[15] & ZBIT) != 0); \
	184	ASSIGNC ((state->Reg[15] & CBIT) != 0); \
	185	ASSIGNV ((state->Reg[15] & VBIT) != 0); \
	186	} \
	187	else \
	188	{ \
	189	state->Reg[15] = R15PC \| ((s) & (CCBITS \| R15INTBITS \| R15MODEBITS)); \
	190	ARMul_R15Altered (state); \
	191	} \
	192	} \
	193	while (0)
	194
	195	#define SETABORT(i, m, d) \
	196	do \
	197	{ \
	198	int SETABORT_mode = (m); \
	199	\
	200	ARMul_SetSPSR (state, SETABORT_mode, ARMul_GetCPSR (state)); \
	201	ARMul_SetCPSR (state, ((ARMul_GetCPSR (state) & ~(EMODE \| TBIT)) \
	202	\| (i) \| SETABORT_mode)); \
	203	state->Reg[14] = temp - (d); \
	204	} \
	205	while (0)
c906108c SS	206
	207	#ifndef MODE32
	208	#define VECTORS 0x20
	209	#define LEGALADDR 0x03ffffff
	210	#define VECTORACCESS(address) (address < VECTORS && ARMul_MODE26BIT && state->prog32Sig)
ff44f8e3	211	#define ADDREXCEPT(address) (address > LEGALADDR && !state->data32Sig)
c906108c SS	212	#endif
c906108c SS	213
ff44f8e3 NC	214	#define INTERNALABORT(address) \
	215	do \
	216	{ \
	217	if (address < VECTORS) \
	218	state->Aborted = ARMul_DataAbortV; \
	219	else \
	220	state->Aborted = ARMul_AddrExceptnV; \
	221	} \
	222	while (0)
c906108c SS	223
c906108c SS	224	#ifdef MODE32
ff44f8e3	225	#define TAKEABORT ARMul_Abort (state, ARMul_DataAbortV)
c906108c	226	#else
ff44f8e3 NC	227	#define TAKEABORT \
	228	do \
	229	{ \
	230	if (state->Aborted == ARMul_AddrExceptnV) \
	231	ARMul_Abort (state, ARMul_AddrExceptnV); \
	232	else \
	233	ARMul_Abort (state, ARMul_DataAbortV); \
	234	} \
	235	while (0)
c906108c	236	#endif
c906108c	237
ff44f8e3 NC	238	#define CPTAKEABORT \
	239	do \
	240	{ \
	241	if (!state->Aborted) \
	242	ARMul_Abort (state, ARMul_UndefinedInstrV); \
	243	else if (state->Aborted == ARMul_AddrExceptnV) \
	244	ARMul_Abort (state, ARMul_AddrExceptnV); \
	245	else \
	246	ARMul_Abort (state, ARMul_DataAbortV); \
	247	} \
	248	while (0);
	249
	250
	251	/* Different ways to start the next instruction. */
	252	#define SEQ 0
	253	#define NONSEQ 1
	254	#define PCINCEDSEQ 2
c906108c	255	#define PCINCEDNONSEQ 3
ff44f8e3 NC	256	#define PRIMEPIPE 4
ff44f8e3 NC	257	#define RESUME 8
c906108c SS	258
c906108c SS	259	#define NORMALCYCLE state->NextInstr = 0
3943c96b	260	#define BUSUSEDN state->NextInstr \|= 1 /* The next fetch will be an N cycle. */
ff44f8e3 NC	261	#define BUSUSEDINCPCS \
	262	do \
	263	{ \
	264	if (! state->is_v4) \
	265	{ \
	266	/* A standard PC inc and an S cycle. */ \
	267	state->Reg[15] += isize; \
	268	state->NextInstr = (state->NextInstr & 0xff) \| 2; \
	269	} \
	270	} \
3943c96b	271	while (0)
ff44f8e3 NC	272
	273	#define BUSUSEDINCPCN \
	274	do \
	275	{ \
	276	if (state->is_v4) \
	277	BUSUSEDN; \
	278	else \
	279	{ \
	280	/* A standard PC inc and an N cycle. */ \
	281	state->Reg[15] += isize; \
	282	state->NextInstr \|= 3; \
	283	} \
	284	} \
3943c96b	285	while (0)
ff44f8e3 NC	286
	287	#define INCPC \
	288	do \
	289	{ \
	290	/* A standard PC inc. */ \
	291	state->Reg[15] += isize; \
	292	state->NextInstr \|= 2; \
	293	} \
	294	while (0)
	295
c906108c SS	296	#define FLUSHPIPE state->NextInstr \|= PRIMEPIPE
c906108c SS	297
ff44f8e3	298	/* Cycle based emulation. */
c906108c SS	299
	300	#define OUTPUTCP(i,a,b)
	301	#define NCYCLE
	302	#define SCYCLE
	303	#define ICYCLE
	304	#define CCYCLE
	305	#define NEXTCYCLE(c)
	306
ff44f8e3	307	/* Macros to extract parts of instructions. */
57165fb4 NC	308	#define DESTReg (BITS (12, 15))
	309	#define LHSReg (BITS (16, 19))
	310	#define RHSReg (BITS ( 0, 3))
c906108c SS	311
	312	#define DEST (state->Reg[DESTReg])
	313
	314	#ifdef MODE32
	315	#ifdef MODET
	316	#define LHS ((LHSReg == 15) ? (state->Reg[15] & 0xFFFFFFFC): (state->Reg[LHSReg]))
	317	#else
	318	#define LHS (state->Reg[LHSReg])
	319	#endif
	320	#else
ff44f8e3	321	#define LHS ((LHSReg == 15) ? R15PC : (state->Reg[LHSReg]))
c906108c SS	322	#endif
c906108c SS	323
ff44f8e3 NC	324	#define MULDESTReg (BITS (16, 19))
	325	#define MULLHSReg (BITS ( 0, 3))
	326	#define MULRHSReg (BITS ( 8, 11))
	327	#define MULACCReg (BITS (12, 15))
c906108c	328
ff44f8e3	329	#define DPImmRHS (ARMul_ImmedTable[BITS(0, 11)])
c906108c SS	330	#define DPSImmRHS temp = BITS(0,11) ; \
c906108c SS	331	rhs = ARMul_ImmedTable[temp] ; \
ff44f8e3 NC	332	if (temp > 255) /* There was a shift. */ \
ff44f8e3 NC	333	ASSIGNC (rhs >> 31) ;
c906108c SS	334
c906108c SS	335	#ifdef MODE32
ff44f8e3 NC	336	#define DPRegRHS ((BITS (4,11) == 0) ? state->Reg[RHSReg] \
	337	: GetDPRegRHS (state, instr))
	338	#define DPSRegRHS ((BITS (4,11) == 0) ? state->Reg[RHSReg] \
	339	: GetDPSRegRHS (state, instr))
c906108c	340	#else
ff44f8e3 NC	341	#define DPRegRHS ((BITS (0, 11) < 15) ? state->Reg[RHSReg] \
	342	: GetDPRegRHS (state, instr))
	343	#define DPSRegRHS ((BITS (0, 11) < 15) ? state->Reg[RHSReg] \
	344	: GetDPSRegRHS (state, instr))
c906108c SS	345	#endif
	346
	347	#define LSBase state->Reg[LHSReg]
	348	#define LSImmRHS (BITS(0,11))
	349
	350	#ifdef MODE32
ff44f8e3 NC	351	#define LSRegRHS ((BITS (4, 11) == 0) ? state->Reg[RHSReg] \
ff44f8e3 NC	352	: GetLSRegRHS (state, instr))
c906108c	353	#else
ff44f8e3 NC	354	#define LSRegRHS ((BITS (0, 11) < 15) ? state->Reg[RHSReg] \
ff44f8e3 NC	355	: GetLSRegRHS (state, instr))
c906108c SS	356	#endif
c906108c SS	357
ff44f8e3 NC	358	#define LSMNumRegs ((ARMword) ARMul_BitList[BITS (0, 7)] + \
	359	(ARMword) ARMul_BitList[BITS (8, 15)] )
	360	#define LSMBaseFirst ((LHSReg == 0 && BIT (0)) \|\| \
	361	(BIT (LHSReg) && BITS (0, LHSReg - 1) == 0))
c906108c SS	362
	363	#define SWAPSRC (state->Reg[RHSReg])
	364
ff44f8e3 NC	365	#define LSCOff (BITS (0, 7) << 2)
ff44f8e3 NC	366	#define CPNum BITS (8, 11)
c906108c	367
ff44f8e3 NC	368	/* Determine if access to coprocessor CP is permitted.
ff44f8e3 NC	369	The XScale has a register in CP15 which controls access to CP0 - CP13. */
57165fb4 NC	370	#define CP_ACCESS_ALLOWED(STATE, CP) \
	371	( ((CP) >= 14) \
	372	\|\| (! (STATE)->is_XScale) \
ff44f8e3	373	\|\| (read_cp15_reg (15, 0, 1) & (1 << (CP))))
c906108c	374
ff44f8e3 NC	375	/* Macro to rotate n right by b bits. */
ff44f8e3 NC	376	#define ROTATER(n, b) (((n) >> (b)) \| ((n) << (32 - (b))))
c906108c	377
ff44f8e3	378	/* Macros to store results of instructions. */
57165fb4 NC	379	#define WRITEDEST(d) \
	380	do \
	381	{ \
	382	if (DESTReg == 15) \
	383	WriteR15 (state, d); \
	384	else \
	385	DEST = d; \
	386	} \
	387	while (0)
	388
	389	#define WRITESDEST(d) \
	390	do \
	391	{ \
	392	if (DESTReg == 15) \
	393	WriteSR15 (state, d); \
	394	else \
	395	{ \
	396	DEST = d; \
	397	ARMul_NegZero (state, d); \
	398	} \
	399	} \
	400	while (0)
	401
	402	#define WRITEDESTB(d) \
	403	do \
	404	{ \
	405	if (DESTReg == 15) \
	406	WriteR15Branch (state, d); \
	407	else \
	408	DEST = d; \
	409	} \
	410	while (0)
892c6b9d	411
c906108c SS	412	#define BYTETOBUS(data) ((data & 0xff) \| \
	413	((data & 0xff) << 8) \| \
	414	((data & 0xff) << 16) \| \
	415	((data & 0xff) << 24))
ff44f8e3	416
57165fb4 NC	417	#define BUSTOBYTE(address, data) \
	418	do \
	419	{ \
	420	if (state->bigendSig) \
	421	temp = (data >> (((address ^ 3) & 3) << 3)) & 0xff; \
	422	else \
	423	temp = (data >> ((address & 3) << 3)) & 0xff; \
	424	} \
	425	while (0)
c906108c	426
ff44f8e3 NC	427	#define LOADMULT(instr, address, wb) LoadMult (state, instr, address, wb)
	428	#define LOADSMULT(instr, address, wb) LoadSMult (state, instr, address, wb)
	429	#define STOREMULT(instr, address, wb) StoreMult (state, instr, address, wb)
	430	#define STORESMULT(instr, address, wb) StoreSMult (state, instr, address, wb)
c906108c SS	431
c906108c SS	432	#define POSBRANCH ((instr & 0x7fffff) << 2)
179ae6ea NC	433	#define NEGBRANCH ((0xff000000 \|(instr & 0xffffff)) << 2)
179ae6ea NC	434
c906108c	435
ff44f8e3	436	/* Values for Emulate. */
dfcd3bfb JM	437	#define STOP 0 /* stop */
	438	#define CHANGEMODE 1 /* change mode */
	439	#define ONCE 2 /* execute just one interation */
	440	#define RUN 3 /* continuous execution */
c906108c	441
ff44f8e3 NC	442	/* Stuff that is shared across modes. */
	443	extern unsigned ARMul_MultTable[]; /* Number of I cycles for a mult. */
	444	extern ARMword ARMul_ImmedTable[]; /* Immediate DP LHS values. */
	445	extern char ARMul_BitList[]; /* Number of bits in a byte table. */
c906108c	446
ff44f8e3	447	#define EVENTLISTSIZE 1024L
c906108c	448
ff44f8e3	449	/* Thumb support. */
dfcd3bfb JM	450	typedef enum
dfcd3bfb JM	451	{
ff44f8e3 NC	452	t_undefined, /* Undefined Thumb instruction. */
	453	t_decoded, /* Instruction decoded to ARM equivalent. */
	454	t_branch /* Thumb branch (already processed). */
dfcd3bfb JM	455	}
dfcd3bfb JM	456	tdstate;
c906108c	457
ff44f8e3	458	/* Macros to scrutinize instructions. */
c906108c SS	459	#define UNDEF_Test
	460	#define UNDEF_Shift
	461	#define UNDEF_MSRPC
	462	#define UNDEF_MRSPC
	463	#define UNDEF_MULPCDest
	464	#define UNDEF_MULDestEQOp1
	465	#define UNDEF_LSRBPC
	466	#define UNDEF_LSRBaseEQOffWb
	467	#define UNDEF_LSRBaseEQDestWb
	468	#define UNDEF_LSRPCBaseWb
	469	#define UNDEF_LSRPCOffWb
	470	#define UNDEF_LSMNoRegs
	471	#define UNDEF_LSMPCBase
	472	#define UNDEF_LSMUserBankWb
	473	#define UNDEF_LSMBaseInListWb
	474	#define UNDEF_SWPPC
	475	#define UNDEF_CoProHS
	476	#define UNDEF_MCRPC
	477	#define UNDEF_LSCPCBaseWb
	478	#define UNDEF_UndefNotBounced
	479	#define UNDEF_ShortInt
	480	#define UNDEF_IllegalMode
	481	#define UNDEF_Prog32SigChange
	482	#define UNDEF_Data32SigChange
f1129fb8	483
ff44f8e3 NC	484	/* Prototypes for exported functions. */
	485	extern unsigned ARMul_NthReg (ARMword, unsigned);
	486	extern int AddOverflow (ARMword, ARMword, ARMword);
	487	extern int SubOverflow (ARMword, ARMword, ARMword);
	488	extern ARMword ARMul_Emulate26 (ARMul_State *);
	489	extern ARMword ARMul_Emulate32 (ARMul_State *);
	490	extern unsigned IntPending (ARMul_State *);
	491	extern void ARMul_CPSRAltered (ARMul_State *);
	492	extern void ARMul_R15Altered (ARMul_State *);
	493	extern ARMword ARMul_GetPC (ARMul_State *);
	494	extern ARMword ARMul_GetNextPC (ARMul_State *);
	495	extern ARMword ARMul_GetR15 (ARMul_State *);
	496	extern ARMword ARMul_GetCPSR (ARMul_State *);
	497	extern void ARMul_EnvokeEvent (ARMul_State *);
	498	extern unsigned long ARMul_Time (ARMul_State *);
	499	extern void ARMul_NegZero (ARMul_State *, ARMword);
	500	extern void ARMul_SetPC (ARMul_State *, ARMword);
	501	extern void ARMul_SetR15 (ARMul_State *, ARMword);
	502	extern void ARMul_SetCPSR (ARMul_State *, ARMword);
	503	extern ARMword ARMul_GetSPSR (ARMul_State *, ARMword);
	504	extern void ARMul_Abort26 (ARMul_State *, ARMword);
	505	extern void ARMul_Abort32 (ARMul_State *, ARMword);
	506	extern ARMword ARMul_MRC (ARMul_State *, ARMword);
	507	extern void ARMul_CDP (ARMul_State *, ARMword);
	508	extern void ARMul_LDC (ARMul_State *, ARMword, ARMword);
	509	extern void ARMul_STC (ARMul_State *, ARMword, ARMword);
	510	extern void ARMul_MCR (ARMul_State *, ARMword, ARMword);
	511	extern void ARMul_SetSPSR (ARMul_State *, ARMword, ARMword);
	512	extern ARMword ARMul_SwitchMode (ARMul_State *, ARMword, ARMword);
	513	extern ARMword ARMul_Align (ARMul_State *, ARMword, ARMword);
	514	extern ARMword ARMul_SwitchMode (ARMul_State *, ARMword, ARMword);
	515	extern void ARMul_MSRCpsr (ARMul_State *, ARMword, ARMword);
	516	extern void ARMul_SubOverflow (ARMul_State *, ARMword, ARMword, ARMword);
	517	extern void ARMul_AddOverflow (ARMul_State *, ARMword, ARMword, ARMword);
	518	extern void ARMul_SubCarry (ARMul_State *, ARMword, ARMword, ARMword);
	519	extern void ARMul_AddCarry (ARMul_State *, ARMword, ARMword, ARMword);
	520	extern tdstate ARMul_ThumbDecode (ARMul_State , ARMword, ARMword, ARMword );
	521	extern ARMword ARMul_GetReg (ARMul_State *, unsigned, unsigned);
	522	extern void ARMul_SetReg (ARMul_State *, unsigned, unsigned, ARMword);
	523	extern void ARMul_ScheduleEvent (ARMul_State , unsigned long, unsigned () (ARMul_State *));
f1129fb8	524	/* Coprocessor support functions. */
ff44f8e3 NC	525	extern unsigned ARMul_CoProInit (ARMul_State *);
	526	extern void ARMul_CoProExit (ARMul_State *);
	527	extern void ARMul_CoProAttach (ARMul_State , unsigned, ARMul_CPInits , ARMul_CPExits *,
	528	ARMul_LDCs , ARMul_STCs , ARMul_MRCs , ARMul_MCRs ,
	529	ARMul_CDPs , ARMul_CPReads , ARMul_CPWrites *);
	530	extern void ARMul_CoProDetach (ARMul_State *, unsigned);
	531	extern ARMword read_cp15_reg (unsigned, unsigned, unsigned);
	532