sim/arm/armdefs.h

   1 /*  armdefs.h -- ARMulator common definitions:  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 #include <stdio.h>
  19 #include <stdlib.h>
  20
  21 #define FALSE 0
  22 #define TRUE 1
  23 #define LOW 0
  24 #define HIGH 1
  25 #define LOWHIGH 1
  26 #define HIGHLOW 2
  27
  28 #ifndef __STDC__
  29 typedef char *VoidStar;
  30 #endif
  31
  32 typedef unsigned long ARMword;  /* must be 32 bits wide */
  33 typedef struct ARMul_State ARMul_State;
  34
  35 typedef unsigned ARMul_CPInits (ARMul_State * state);
  36 typedef unsigned ARMul_CPExits (ARMul_State * state);
  37 typedef unsigned ARMul_LDCs (ARMul_State * state, unsigned type,
  38                              ARMword instr, ARMword value);
  39 typedef unsigned ARMul_STCs (ARMul_State * state, unsigned type,
  40                              ARMword instr, ARMword * value);
  41 typedef unsigned ARMul_MRCs (ARMul_State * state, unsigned type,
  42                              ARMword instr, ARMword * value);
  43 typedef unsigned ARMul_MCRs (ARMul_State * state, unsigned type,
  44                              ARMword instr, ARMword value);
  45 typedef unsigned ARMul_CDPs (ARMul_State * state, unsigned type,
  46                              ARMword instr);
  47 typedef unsigned ARMul_CPReads (ARMul_State * state, unsigned reg,
  48                                 ARMword * value);
  49 typedef unsigned ARMul_CPWrites (ARMul_State * state, unsigned reg,
  50                                  ARMword value);
  51
  52 struct ARMul_State
  53 {
  54   ARMword Emulate;              /* to start and stop emulation */
  55   unsigned EndCondition;        /* reason for stopping */
  56   unsigned ErrorCode;           /* type of illegal instruction */
  57   ARMword Reg[16];              /* the current register file */
  58   ARMword RegBank[7][16];       /* all the registers */
  59   ARMword Cpsr;                 /* the current psr */
  60   ARMword Spsr[7];              /* the exception psr's */
  61   ARMword NFlag, ZFlag, CFlag, VFlag, IFFlags;  /* dummy flags for speed */
  62 #ifdef MODET
  63   ARMword TFlag;                /* Thumb state */
  64 #endif
  65   ARMword Bank;                 /* the current register bank */
  66   ARMword Mode;                 /* the current mode */
  67   ARMword instr, pc, temp;      /* saved register state */
  68   ARMword loaded, decoded;      /* saved pipeline state */
  69   unsigned long NumScycles, NumNcycles, NumIcycles, NumCcycles, NumFcycles;     /* emulated cycles used */
  70   unsigned long NumInstrs;      /* the number of instructions executed */
  71   unsigned NextInstr;
  72   unsigned VectorCatch;         /* caught exception mask */
  73   unsigned CallDebug;           /* set to call the debugger */
  74   unsigned CanWatch;            /* set by memory interface if its willing to suffer the
  75                                    overhead of checking for watchpoints on each memory
  76                                    access */
  77   unsigned MemReadDebug, MemWriteDebug;
  78   unsigned long StopHandle;
  79
  80   unsigned char *MemDataPtr;    /* admin data */
  81   unsigned char *MemInPtr;      /* the Data In bus */
  82   unsigned char *MemOutPtr;     /* the Data Out bus (which you may not need */
  83   unsigned char *MemSparePtr;   /* extra space */
  84   ARMword MemSize;
  85
  86   unsigned char *OSptr;         /* OS Handle */
  87   char *CommandLine;            /* Command Line from ARMsd */
  88
  89   ARMul_CPInits *CPInit[16];    /* coprocessor initialisers */
  90   ARMul_CPExits *CPExit[16];    /* coprocessor finalisers */
  91   ARMul_LDCs *LDC[16];          /* LDC instruction */
  92   ARMul_STCs *STC[16];          /* STC instruction */
  93   ARMul_MRCs *MRC[16];          /* MRC instruction */
  94   ARMul_MCRs *MCR[16];          /* MCR instruction */
  95   ARMul_CDPs *CDP[16];          /* CDP instruction */
  96   ARMul_CPReads *CPRead[16];    /* Read CP register */
  97   ARMul_CPWrites *CPWrite[16];  /* Write CP register */
  98   unsigned char *CPData[16];    /* Coprocessor data */
  99   unsigned char const *CPRegWords[16];  /* map of coprocessor register sizes */
 100
 101   unsigned EventSet;            /* the number of events in the queue */
 102   unsigned long Now;            /* time to the nearest cycle */
 103   struct EventNode **EventPtr;  /* the event list */
 104
 105   unsigned Exception;           /* enable the next four values */
 106   unsigned Debug;               /* show instructions as they are executed */
 107   unsigned NresetSig;           /* reset the processor */
 108   unsigned NfiqSig;
 109   unsigned NirqSig;
 110
 111   unsigned abortSig;
 112   unsigned NtransSig;
 113   unsigned bigendSig;
 114   unsigned prog32Sig;
 115   unsigned data32Sig;
 116   unsigned lateabtSig;
 117   ARMword Vector;               /* synthesize aborts in cycle modes */
 118   ARMword Aborted;              /* sticky flag for aborts */
 119   ARMword Reseted;              /* sticky flag for Reset */
 120   ARMword Inted, LastInted;     /* sticky flags for interrupts */
 121   ARMword Base;                 /* extra hand for base writeback */
 122   ARMword AbortAddr;            /* to keep track of Prefetch aborts */
 123
 124   const struct Dbg_HostosInterface *hostif;
 125
 126   int verbose;                  /* non-zero means print various messages like the banner */
 127 };
 128
 129 #define ResetPin NresetSig
 130 #define FIQPin NfiqSig
 131 #define IRQPin NirqSig
 132 #define AbortPin abortSig
 133 #define TransPin NtransSig
 134 #define BigEndPin bigendSig
 135 #define Prog32Pin prog32Sig
 136 #define Data32Pin data32Sig
 137 #define LateAbortPin lateabtSig
 138
 139 /***************************************************************************\
 140 *                        Types of ARM we know about                         *
 141 \***************************************************************************/
 142
 143 /* The bitflags */
 144 #define ARM_Fix26_Prop   0x01
 145 #define ARM_Nexec_Prop   0x02
 146 #define ARM_Debug_Prop   0x10
 147 #define ARM_Isync_Prop   ARM_Debug_Prop
 148 #define ARM_Lock_Prop    0x20
 149
 150 /* ARM2 family */
 151 #define ARM2    (ARM_Fix26_Prop)
 152 #define ARM2as  ARM2
 153 #define ARM61   ARM2
 154 #define ARM3    ARM2
 155
 156 #ifdef ARM60                    /* previous definition in armopts.h */
 157 #undef ARM60
 158 #endif
 159
 160 /* ARM6 family */
 161 #define ARM6    (ARM_Lock_Prop)
 162 #define ARM60   ARM6
 163 #define ARM600  ARM6
 164 #define ARM610  ARM6
 165 #define ARM620  ARM6
 166
 167
 168 /***************************************************************************\
 169 *                   Macros to extract instruction fields                    *
 170 \***************************************************************************/
 171
 172 #define BIT(n) ( (ARMword)(instr>>(n))&1)       /* bit n of instruction */
 173 #define BITS(m,n) ( (ARMword)(instr<<(31-(n))) >> ((31-(n))+(m)) )      /* bits m to n of instr */
 174 #define TOPBITS(n) (instr >> (n))       /* bits 31 to n of instr */
 175
 176 /***************************************************************************\
 177 *                      The hardware vector addresses                        *
 178 \***************************************************************************/
 179
 180 #define ARMResetV 0L
 181 #define ARMUndefinedInstrV 4L
 182 #define ARMSWIV 8L
 183 #define ARMPrefetchAbortV 12L
 184 #define ARMDataAbortV 16L
 185 #define ARMAddrExceptnV 20L
 186 #define ARMIRQV 24L
 187 #define ARMFIQV 28L
 188 #define ARMErrorV 32L           /* This is an offset, not an address ! */
 189
 190 #define ARMul_ResetV ARMResetV
 191 #define ARMul_UndefinedInstrV ARMUndefinedInstrV
 192 #define ARMul_SWIV ARMSWIV
 193 #define ARMul_PrefetchAbortV ARMPrefetchAbortV
 194 #define ARMul_DataAbortV ARMDataAbortV
 195 #define ARMul_AddrExceptnV ARMAddrExceptnV
 196 #define ARMul_IRQV ARMIRQV
 197 #define ARMul_FIQV ARMFIQV
 198
 199 /***************************************************************************\
 200 *                          Mode and Bank Constants                          *
 201 \***************************************************************************/
 202
 203 #define USER26MODE   0L
 204 #define FIQ26MODE    1L
 205 #define IRQ26MODE    2L
 206 #define SVC26MODE    3L
 207 #define USER32MODE  16L
 208 #define FIQ32MODE   17L
 209 #define IRQ32MODE   18L
 210 #define SVC32MODE   19L
 211 #define ABORT32MODE 23L
 212 #define UNDEF32MODE 27L
 213 #define SYSTEMMODE  31L
 214
 215 #define ARM32BITMODE (state->Mode > 3)
 216 #define ARM26BITMODE (state->Mode <= 3)
 217 #define ARMMODE (state->Mode)
 218 #define ARMul_MODEBITS 0x1fL
 219 #define ARMul_MODE32BIT ARM32BITMODE
 220 #define ARMul_MODE26BIT ARM26BITMODE
 221
 222 #define USERBANK 0
 223 #define FIQBANK 1
 224 #define IRQBANK 2
 225 #define SVCBANK 3
 226 #define ABORTBANK 4
 227 #define UNDEFBANK 5
 228 #define DUMMYBANK 6
 229 #define SYSTEMBANK 7
 230
 231 #define BANK_CAN_ACCESS_SPSR(bank)  \
 232   ((bank) != USERBANK && (bank) != SYSTEMBANK && (bank) != DUMMYBANK)
 233
 234 /***************************************************************************\
 235 *                  Definitons of things in the emulator                     *
 236 \***************************************************************************/
 237
 238 extern void ARMul_EmulateInit (void);
 239 extern ARMul_State *ARMul_NewState (void);
 240 extern void ARMul_Reset (ARMul_State * state);
 241 extern ARMword ARMul_DoProg (ARMul_State * state);
 242 extern ARMword ARMul_DoInstr (ARMul_State * state);
 243
 244 /***************************************************************************\
 245 *                Definitons of things for event handling                    *
 246 \***************************************************************************/
 247
 248 extern void ARMul_ScheduleEvent (ARMul_State * state, unsigned long delay,
 249                                  unsigned (*func) ());
 250 extern void ARMul_EnvokeEvent (ARMul_State * state);
 251 extern unsigned long ARMul_Time (ARMul_State * state);
 252
 253 /***************************************************************************\
 254 *                          Useful support routines                          *
 255 \***************************************************************************/
 256
 257 extern ARMword ARMul_GetReg (ARMul_State * state, unsigned mode,
 258                              unsigned reg);
 259 extern void ARMul_SetReg (ARMul_State * state, unsigned mode, unsigned reg,
 260                           ARMword value);
 261 extern ARMword ARMul_GetPC (ARMul_State * state);
 262 extern ARMword ARMul_GetNextPC (ARMul_State * state);
 263 extern void ARMul_SetPC (ARMul_State * state, ARMword value);
 264 extern ARMword ARMul_GetR15 (ARMul_State * state);
 265 extern void ARMul_SetR15 (ARMul_State * state, ARMword value);
 266
 267 extern ARMword ARMul_GetCPSR (ARMul_State * state);
 268 extern void ARMul_SetCPSR (ARMul_State * state, ARMword value);
 269 extern ARMword ARMul_GetSPSR (ARMul_State * state, ARMword mode);
 270 extern void ARMul_SetSPSR (ARMul_State * state, ARMword mode, ARMword value);
 271
 272 /***************************************************************************\
 273 *                  Definitons of things to handle aborts                    *
 274 \***************************************************************************/
 275
 276 extern void ARMul_Abort (ARMul_State * state, ARMword address);
 277 #define ARMul_ABORTWORD 0xefffffff      /* SWI -1 */
 278 #define ARMul_PREFETCHABORT(address) if (state->AbortAddr == 1) \
 279                                         state->AbortAddr = (address & ~3L)
 280 #define ARMul_DATAABORT(address) state->abortSig = HIGH ; \
 281                                  state->Aborted = ARMul_DataAbortV ;
 282 #define ARMul_CLEARABORT state->abortSig = LOW
 283
 284 /***************************************************************************\
 285 *              Definitons of things in the memory interface                 *
 286 \***************************************************************************/
 287
 288 extern unsigned ARMul_MemoryInit (ARMul_State * state,
 289                                   unsigned long initmemsize);
 290 extern void ARMul_MemoryExit (ARMul_State * state);
 291
 292 extern ARMword ARMul_LoadInstrS (ARMul_State * state, ARMword address,
 293                                  ARMword isize);
 294 extern ARMword ARMul_LoadInstrN (ARMul_State * state, ARMword address,
 295                                  ARMword isize);
 296 extern ARMword ARMul_ReLoadInstr (ARMul_State * state, ARMword address,
 297                                   ARMword isize);
 298
 299 extern ARMword ARMul_LoadWordS (ARMul_State * state, ARMword address);
 300 extern ARMword ARMul_LoadWordN (ARMul_State * state, ARMword address);
 301 extern ARMword ARMul_LoadHalfWord (ARMul_State * state, ARMword address);
 302 extern ARMword ARMul_LoadByte (ARMul_State * state, ARMword address);
 303
 304 extern void ARMul_StoreWordS (ARMul_State * state, ARMword address,
 305                               ARMword data);
 306 extern void ARMul_StoreWordN (ARMul_State * state, ARMword address,
 307                               ARMword data);
 308 extern void ARMul_StoreHalfWord (ARMul_State * state, ARMword address,
 309                                  ARMword data);
 310 extern void ARMul_StoreByte (ARMul_State * state, ARMword address,
 311                              ARMword data);
 312
 313 extern ARMword ARMul_SwapWord (ARMul_State * state, ARMword address,
 314                                ARMword data);
 315 extern ARMword ARMul_SwapByte (ARMul_State * state, ARMword address,
 316                                ARMword data);
 317
 318 extern void ARMul_Icycles (ARMul_State * state, unsigned number,
 319                            ARMword address);
 320 extern void ARMul_Ccycles (ARMul_State * state, unsigned number,
 321                            ARMword address);
 322
 323 extern ARMword ARMul_ReadWord (ARMul_State * state, ARMword address);
 324 extern ARMword ARMul_ReadByte (ARMul_State * state, ARMword address);
 325 extern void ARMul_WriteWord (ARMul_State * state, ARMword address,
 326                              ARMword data);
 327 extern void ARMul_WriteByte (ARMul_State * state, ARMword address,
 328                              ARMword data);
 329
 330 extern ARMword ARMul_MemAccess (ARMul_State * state, ARMword, ARMword,
 331                                 ARMword, ARMword, ARMword, ARMword, ARMword,
 332                                 ARMword, ARMword, ARMword);
 333
 334 /***************************************************************************\
 335 *            Definitons of things in the co-processor interface             *
 336 \***************************************************************************/
 337
 338 #define ARMul_FIRST 0
 339 #define ARMul_TRANSFER 1
 340 #define ARMul_BUSY 2
 341 #define ARMul_DATA 3
 342 #define ARMul_INTERRUPT 4
 343 #define ARMul_DONE 0
 344 #define ARMul_CANT 1
 345 #define ARMul_INC 3
 346
 347 extern unsigned ARMul_CoProInit (ARMul_State * state);
 348 extern void ARMul_CoProExit (ARMul_State * state);
 349 extern void ARMul_CoProAttach (ARMul_State * state, unsigned number,
 350                                ARMul_CPInits * init, ARMul_CPExits * exit,
 351                                ARMul_LDCs * ldc, ARMul_STCs * stc,
 352                                ARMul_MRCs * mrc, ARMul_MCRs * mcr,
 353                                ARMul_CDPs * cdp,
 354                                ARMul_CPReads * read, ARMul_CPWrites * write);
 355 extern void ARMul_CoProDetach (ARMul_State * state, unsigned number);
 356
 357 /***************************************************************************\
 358 *               Definitons of things in the host environment                *
 359 \***************************************************************************/
 360
 361 extern unsigned ARMul_OSInit (ARMul_State * state);
 362 extern void ARMul_OSExit (ARMul_State * state);
 363 extern unsigned ARMul_OSHandleSWI (ARMul_State * state, ARMword number);
 364 extern ARMword ARMul_OSLastErrorP (ARMul_State * state);
 365
 366 extern ARMword ARMul_Debug (ARMul_State * state, ARMword pc, ARMword instr);
 367 extern unsigned ARMul_OSException (ARMul_State * state, ARMword vector,
 368                                    ARMword pc);
 369 extern int rdi_log;
 370
 371 /***************************************************************************\
 372 *                            Host-dependent stuff                           *
 373 \***************************************************************************/
 374
 375 #ifdef macintosh
 376 pascal void SpinCursor (short increment);       /* copied from CursorCtl.h */
 377 # define HOURGLASS           SpinCursor( 1 )
 378 # define HOURGLASS_RATE      1023       /* 2^n - 1 */
 379 #endif
 380
 381 extern void ARMul_UndefInstr      (ARMul_State *, ARMword);
 382 extern void ARMul_FixCPSR         (ARMul_State *, ARMword, ARMword);
 383 extern void ARMul_FixSPSR         (ARMul_State *, ARMword, ARMword);
 384 extern void ARMul_ConsolePrint    (ARMul_State *, const char *, ...);
 385 extern void ARMul_SelectProcessor (ARMul_State *, unsigned);