Subversion Repositories openrisc_2011-10-31

/*  armdefs.h -- ARMulator common definitions:  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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */

#include "config.h"

#include <stdio.h>

#include <stdlib.h>

#define FALSE 0

#define TRUE 1

#define LOW 0

#define HIGH 1

#define LOWHIGH 1

#define HIGHLOW 2

#ifndef __STDC__

typedef char *VoidStar;

#endif

#ifdef HAVE_STDINT_H

#include <stdint.h>

typedef uint32_t ARMword;

typedef int32_t ARMsword;

typedef uint64_t ARMdword;

typedef int64_t ARMsdword;

#else

typedef unsigned int ARMword;   /* must be 32 bits wide */

typedef signed int ARMsword;

typedef unsigned long long ARMdword;    /* Must be at least 64 bits wide.  */

typedef signed long long ARMsdword;

#endif

typedef struct ARMul_State ARMul_State;

typedef unsigned ARMul_CPInits (ARMul_State * state);

typedef unsigned ARMul_CPExits (ARMul_State * state);

typedef unsigned ARMul_LDCs (ARMul_State * state, unsigned type,

                             ARMword instr, ARMword value);

typedef unsigned ARMul_STCs (ARMul_State * state, unsigned type,

                             ARMword instr, ARMword * value);

typedef unsigned ARMul_MRCs (ARMul_State * state, unsigned type,

                             ARMword instr, ARMword * value);

typedef unsigned ARMul_MCRs (ARMul_State * state, unsigned type,

                             ARMword instr, ARMword value);

typedef unsigned ARMul_CDPs (ARMul_State * state, unsigned type,

                             ARMword instr);

typedef unsigned ARMul_CPReads (ARMul_State * state, unsigned reg,

                                ARMword * value);

typedef unsigned ARMul_CPWrites (ARMul_State * state, unsigned reg,

                                 ARMword value);

struct ARMul_State

{

  ARMword Emulate;              /* to start and stop emulation */

  unsigned EndCondition;        /* reason for stopping */

  unsigned ErrorCode;           /* type of illegal instruction */

  ARMword Reg[16];              /* the current register file */

  ARMword RegBank[7][16];       /* all the registers */

  /* 40 bit accumulator.  We always keep this 64 bits wide,

     and move only 40 bits out of it in an MRA insn.  */

  ARMdword Accumulator;

  ARMword Cpsr;                 /* the current psr */

  ARMword Spsr[7];              /* the exception psr's */

  ARMword NFlag, ZFlag, CFlag, VFlag, IFFlags;  /* dummy flags for speed */

  ARMword SFlag;

#ifdef MODET

  ARMword TFlag;                /* Thumb state */

#endif

  ARMword Bank;                 /* the current register bank */

  ARMword Mode;                 /* the current mode */

  ARMword instr, pc, temp;      /* saved register state */

  ARMword loaded, decoded;      /* saved pipeline state */

  unsigned long NumScycles, NumNcycles, NumIcycles, NumCcycles, NumFcycles;     /* emulated cycles used */

  unsigned long NumInstrs;      /* the number of instructions executed */

  unsigned NextInstr;

  unsigned VectorCatch;         /* caught exception mask */

  unsigned CallDebug;           /* set to call the debugger */

  unsigned CanWatch;            /* set by memory interface if its willing to suffer the

                                   overhead of checking for watchpoints on each memory

                                   access */

  unsigned MemReadDebug, MemWriteDebug;

  unsigned long StopHandle;

  unsigned char *MemDataPtr;    /* admin data */

  unsigned char *MemInPtr;      /* the Data In bus */

  unsigned char *MemOutPtr;     /* the Data Out bus (which you may not need */

  unsigned char *MemSparePtr;   /* extra space */

  ARMword MemSize;

  unsigned char *OSptr;         /* OS Handle */

  char *CommandLine;            /* Command Line from ARMsd */

  ARMul_CPInits *CPInit[16];    /* coprocessor initialisers */

  ARMul_CPExits *CPExit[16];    /* coprocessor finalisers */

  ARMul_LDCs *LDC[16];          /* LDC instruction */

  ARMul_STCs *STC[16];          /* STC instruction */

  ARMul_MRCs *MRC[16];          /* MRC instruction */

  ARMul_MCRs *MCR[16];          /* MCR instruction */

  ARMul_CDPs *CDP[16];          /* CDP instruction */

  ARMul_CPReads *CPRead[16];    /* Read CP register */

  ARMul_CPWrites *CPWrite[16];  /* Write CP register */

  unsigned char *CPData[16];    /* Coprocessor data */

  unsigned char const *CPRegWords[16];  /* map of coprocessor register sizes */

  unsigned long LastTime;       /* Value of last call to ARMul_Time() */

  ARMword CP14R0_CCD;           /* used to count 64 clock cycles with CP14 R0 bit

                                   3 set */

  unsigned EventSet;            /* the number of events in the queue */

  unsigned long Now;            /* time to the nearest cycle */

  struct EventNode **EventPtr;  /* the event list */

  unsigned Exception;           /* enable the next four values */

  unsigned Debug;               /* show instructions as they are executed */

  unsigned NresetSig;           /* reset the processor */

  unsigned NfiqSig;

  unsigned NirqSig;

  unsigned abortSig;

  unsigned NtransSig;

  unsigned bigendSig;

  unsigned prog32Sig;

  unsigned data32Sig;

  unsigned lateabtSig;

  ARMword Vector;               /* synthesize aborts in cycle modes */

  ARMword Aborted;              /* sticky flag for aborts */

  ARMword Reseted;              /* sticky flag for Reset */

  ARMword Inted, LastInted;     /* sticky flags for interrupts */

  ARMword Base;                 /* extra hand for base writeback */

  ARMword AbortAddr;            /* to keep track of Prefetch aborts */

  const struct Dbg_HostosInterface *hostif;

  unsigned is_v4;               /* Are we emulating a v4 architecture (or higher) ?  */

  unsigned is_v5;               /* Are we emulating a v5 architecture ?  */

  unsigned is_v5e;              /* Are we emulating a v5e architecture ?  */

  unsigned is_v6;               /* Are we emulating a v6 architecture ?  */

  unsigned is_XScale;           /* Are we emulating an XScale architecture ?  */

  unsigned is_iWMMXt;           /* Are we emulating an iWMMXt co-processor ?  */

  unsigned is_ep9312;           /* Are we emulating a Cirrus Maverick co-processor ?  */

  unsigned verbose;             /* Print various messages like the banner */

};

#define ResetPin NresetSig

#define FIQPin NfiqSig

#define IRQPin NirqSig

#define AbortPin abortSig

#define TransPin NtransSig

#define BigEndPin bigendSig

#define Prog32Pin prog32Sig

#define Data32Pin data32Sig

#define LateAbortPin lateabtSig

/***************************************************************************\

*                        Properties of ARM we know about                    *

\***************************************************************************/

/* The bitflags */

#define ARM_Fix26_Prop   0x01

#define ARM_Nexec_Prop   0x02

#define ARM_Debug_Prop   0x10

#define ARM_Isync_Prop   ARM_Debug_Prop

#define ARM_Lock_Prop    0x20

#define ARM_v4_Prop      0x40

#define ARM_v5_Prop      0x80

#define ARM_v5e_Prop     0x100

#define ARM_XScale_Prop  0x200

#define ARM_ep9312_Prop  0x400

#define ARM_iWMMXt_Prop  0x800

#define ARM_v6_Prop      0x1000

/***************************************************************************\

*                   Macros to extract instruction fields                    *

\***************************************************************************/

#define BIT(n) ( (ARMword)(instr>>(n))&1)       /* bit n of instruction */

#define BITS(m,n) ( (ARMword)(instr<<(31-(n))) >> ((31-(n))+(m)) )      /* bits m to n of instr */

#define TOPBITS(n) (instr >> (n))       /* bits 31 to n of instr */

/***************************************************************************\

*                      The hardware vector addresses                        *

\***************************************************************************/

#define ARMResetV 0L

#define ARMUndefinedInstrV 4L

#define ARMSWIV 8L

#define ARMPrefetchAbortV 12L

#define ARMDataAbortV 16L

#define ARMAddrExceptnV 20L

#define ARMIRQV 24L

#define ARMFIQV 28L

#define ARMErrorV 32L           /* This is an offset, not an address ! */

#define ARMul_ResetV ARMResetV

#define ARMul_UndefinedInstrV ARMUndefinedInstrV

#define ARMul_SWIV ARMSWIV

#define ARMul_PrefetchAbortV ARMPrefetchAbortV

#define ARMul_DataAbortV ARMDataAbortV

#define ARMul_AddrExceptnV ARMAddrExceptnV

#define ARMul_IRQV ARMIRQV

#define ARMul_FIQV ARMFIQV

/***************************************************************************\

*                          Mode and Bank Constants                          *

\***************************************************************************/

#define USER26MODE   0L

#define FIQ26MODE    1L

#define IRQ26MODE    2L

#define SVC26MODE    3L

#define USER32MODE  16L

#define FIQ32MODE   17L

#define IRQ32MODE   18L

#define SVC32MODE   19L

#define ABORT32MODE 23L

#define UNDEF32MODE 27L

#define SYSTEMMODE  31L

#define ARM32BITMODE (state->Mode > 3)

#define ARM26BITMODE (state->Mode <= 3)

#define ARMMODE (state->Mode)

#define ARMul_MODEBITS 0x1fL

#define ARMul_MODE32BIT ARM32BITMODE

#define ARMul_MODE26BIT ARM26BITMODE

#define USERBANK 0

#define FIQBANK 1

#define IRQBANK 2

#define SVCBANK 3

#define ABORTBANK 4

#define UNDEFBANK 5

#define DUMMYBANK 6

#define SYSTEMBANK USERBANK

#define BANK_CAN_ACCESS_SPSR(bank)  \

  ((bank) != USERBANK && (bank) != SYSTEMBANK && (bank) != DUMMYBANK)

/***************************************************************************\

*                  Definitons of things in the emulator                     *

\***************************************************************************/

extern void ARMul_EmulateInit (void);

extern ARMul_State *ARMul_NewState (void);

extern void ARMul_Reset (ARMul_State * state);

extern ARMword ARMul_DoProg (ARMul_State * state);

extern ARMword ARMul_DoInstr (ARMul_State * state);

/***************************************************************************\

*                Definitons of things for event handling                    *

\***************************************************************************/

extern void ARMul_ScheduleEvent (ARMul_State * state, unsigned long delay,

                                 unsigned (*func) ());

extern void ARMul_EnvokeEvent (ARMul_State * state);

extern unsigned long ARMul_Time (ARMul_State * state);

/***************************************************************************\

*                          Useful support routines                          *

\***************************************************************************/

extern ARMword ARMul_GetReg (ARMul_State * state, unsigned mode,

                             unsigned reg);

extern void ARMul_SetReg (ARMul_State * state, unsigned mode, unsigned reg,

                          ARMword value);

extern ARMword ARMul_GetPC (ARMul_State * state);

extern ARMword ARMul_GetNextPC (ARMul_State * state);

extern void ARMul_SetPC (ARMul_State * state, ARMword value);

extern ARMword ARMul_GetR15 (ARMul_State * state);

extern void ARMul_SetR15 (ARMul_State * state, ARMword value);

extern ARMword ARMul_GetCPSR (ARMul_State * state);

extern void ARMul_SetCPSR (ARMul_State * state, ARMword value);

extern ARMword ARMul_GetSPSR (ARMul_State * state, ARMword mode);

extern void ARMul_SetSPSR (ARMul_State * state, ARMword mode, ARMword value);

/***************************************************************************\

*                  Definitons of things to handle aborts                    *

\***************************************************************************/

extern void ARMul_Abort (ARMul_State * state, ARMword address);

#define ARMul_ABORTWORD 0xefffffff      /* SWI -1 */

#define ARMul_PREFETCHABORT(address) if (state->AbortAddr == 1) \

                                        state->AbortAddr = (address & ~3L)

#define ARMul_DATAABORT(address) state->abortSig = HIGH ; \

                                 state->Aborted = ARMul_DataAbortV ;

#define ARMul_CLEARABORT state->abortSig = LOW

/***************************************************************************\

*              Definitons of things in the memory interface                 *

\***************************************************************************/

extern unsigned ARMul_MemoryInit (ARMul_State * state,

                                  unsigned long initmemsize);

extern void ARMul_MemoryExit (ARMul_State * state);

extern ARMword ARMul_LoadInstrS (ARMul_State * state, ARMword address,

                                 ARMword isize);

extern ARMword ARMul_LoadInstrN (ARMul_State * state, ARMword address,

                                 ARMword isize);

extern ARMword ARMul_ReLoadInstr (ARMul_State * state, ARMword address,

                                  ARMword isize);

extern ARMword ARMul_LoadWordS (ARMul_State * state, ARMword address);

extern ARMword ARMul_LoadWordN (ARMul_State * state, ARMword address);

extern ARMword ARMul_LoadHalfWord (ARMul_State * state, ARMword address);

extern ARMword ARMul_LoadByte (ARMul_State * state, ARMword address);

extern void ARMul_StoreWordS (ARMul_State * state, ARMword address,

                              ARMword data);

extern void ARMul_StoreWordN (ARMul_State * state, ARMword address,

                              ARMword data);

extern void ARMul_StoreHalfWord (ARMul_State * state, ARMword address,

                                 ARMword data);

extern void ARMul_StoreByte (ARMul_State * state, ARMword address,

                             ARMword data);

extern ARMword ARMul_SwapWord (ARMul_State * state, ARMword address,

                               ARMword data);

extern ARMword ARMul_SwapByte (ARMul_State * state, ARMword address,

                               ARMword data);

extern void ARMul_Icycles (ARMul_State * state, unsigned number,

                           ARMword address);

extern void ARMul_Ccycles (ARMul_State * state, unsigned number,

                           ARMword address);

extern ARMword ARMul_ReadWord (ARMul_State * state, ARMword address);

extern ARMword ARMul_ReadByte (ARMul_State * state, ARMword address);

extern ARMword ARMul_SafeReadByte (ARMul_State * state, ARMword address);

extern void ARMul_WriteWord (ARMul_State * state, ARMword address,

                             ARMword data);

extern void ARMul_WriteByte (ARMul_State * state, ARMword address,

                             ARMword data);

extern void ARMul_SafeWriteByte (ARMul_State * state, ARMword address,

                             ARMword data);

extern ARMword ARMul_MemAccess (ARMul_State * state, ARMword, ARMword,

                                ARMword, ARMword, ARMword, ARMword, ARMword,

                                ARMword, ARMword, ARMword);

/***************************************************************************\

*            Definitons of things in the co-processor interface             *

\***************************************************************************/

#define ARMul_FIRST 0

#define ARMul_TRANSFER 1

#define ARMul_BUSY 2

#define ARMul_DATA 3

#define ARMul_INTERRUPT 4

#define ARMul_DONE 0

#define ARMul_CANT 1

#define ARMul_INC 3

#define ARMul_CP13_R0_FIQ       0x1

#define ARMul_CP13_R0_IRQ       0x2

#define ARMul_CP13_R8_PMUS      0x1

#define ARMul_CP14_R0_ENABLE    0x0001

#define ARMul_CP14_R0_CLKRST    0x0004

#define ARMul_CP14_R0_CCD       0x0008

#define ARMul_CP14_R0_INTEN0    0x0010

#define ARMul_CP14_R0_INTEN1    0x0020

#define ARMul_CP14_R0_INTEN2    0x0040

#define ARMul_CP14_R0_FLAG0     0x0100

#define ARMul_CP14_R0_FLAG1     0x0200

#define ARMul_CP14_R0_FLAG2     0x0400

#define ARMul_CP14_R10_MOE_IB   0x0004

#define ARMul_CP14_R10_MOE_DB   0x0008

#define ARMul_CP14_R10_MOE_BT   0x000c

#define ARMul_CP15_R1_ENDIAN    0x0080

#define ARMul_CP15_R1_ALIGN     0x0002

#define ARMul_CP15_R5_X         0x0400

#define ARMul_CP15_R5_ST_ALIGN  0x0001

#define ARMul_CP15_R5_IMPRE     0x0406

#define ARMul_CP15_R5_MMU_EXCPT 0x0400

#define ARMul_CP15_DBCON_M      0x0100

#define ARMul_CP15_DBCON_E1     0x000c

#define ARMul_CP15_DBCON_E0     0x0003

extern unsigned ARMul_CoProInit (ARMul_State * state);

extern void ARMul_CoProExit (ARMul_State * state);

extern void ARMul_CoProAttach (ARMul_State * state, unsigned number,

                               ARMul_CPInits * init, ARMul_CPExits * exit,

                               ARMul_LDCs * ldc, ARMul_STCs * stc,

                               ARMul_MRCs * mrc, ARMul_MCRs * mcr,

                               ARMul_CDPs * cdp,

                               ARMul_CPReads * read, ARMul_CPWrites * write);

extern void ARMul_CoProDetach (ARMul_State * state, unsigned number);

extern void XScale_check_memacc (ARMul_State * state, ARMword * address,

                                 int store);

extern void XScale_set_fsr_far (ARMul_State * state, ARMword fsr, ARMword far);

extern int XScale_debug_moe (ARMul_State * state, int moe);

/***************************************************************************\

*               Definitons of things in the host environment                *

\***************************************************************************/

extern unsigned ARMul_OSInit (ARMul_State * state);

extern void ARMul_OSExit (ARMul_State * state);

extern unsigned ARMul_OSHandleSWI (ARMul_State * state, ARMword number);

extern ARMword ARMul_OSLastErrorP (ARMul_State * state);

extern ARMword ARMul_Debug (ARMul_State * state, ARMword pc, ARMword instr);

extern unsigned ARMul_OSException (ARMul_State * state, ARMword vector,

                                   ARMword pc);

extern int rdi_log;

/***************************************************************************\

*                            Host-dependent stuff                           *

\***************************************************************************/

#ifdef macintosh

pascal void SpinCursor (short increment);       /* copied from CursorCtl.h */

# define HOURGLASS           SpinCursor( 1 )

# define HOURGLASS_RATE      1023       /* 2^n - 1 */

#endif

extern void ARMul_UndefInstr      (ARMul_State *, ARMword);

extern void ARMul_FixCPSR         (ARMul_State *, ARMword, ARMword);

extern void ARMul_FixSPSR         (ARMul_State *, ARMword, ARMword);

extern void ARMul_ConsolePrint    (ARMul_State *, const char *, ...);

extern void ARMul_SelectProcessor (ARMul_State *, unsigned);