sim/cr16/cr16-sim.h

   1 /* Simulation code for the CR16 processor.
   2    Copyright (C) 2008-2024 Free Software Foundation, Inc.
   3    Contributed by M Ranga Swami Reddy <MR.Swami.Reddy@nsc.com>
   4
   5    This file is part of GDB, the GNU debugger.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program. If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 #include <stdio.h>
  22 #include <ctype.h>
  23 #include <limits.h>
  24 #include "ansidecl.h"
  25 #include "sim/callback.h"
  26 #include "opcode/cr16.h"
  27 #include "bfd.h"
  28 #include "sim-main.h"
  29
  30 #define DEBUG_TRACE             0x00000001
  31 #define DEBUG_VALUES            0x00000002
  32 #define DEBUG_LINE_NUMBER       0x00000004
  33 #define DEBUG_MEMSIZE           0x00000008
  34 #define DEBUG_INSTRUCTION       0x00000010
  35 #define DEBUG_TRAP              0x00000020
  36 #define DEBUG_MEMORY            0x00000040
  37
  38 #ifndef DEBUG
  39 #define DEBUG (DEBUG_TRACE | DEBUG_VALUES | DEBUG_LINE_NUMBER)
  40 #endif
  41
  42 extern int cr16_debug;
  43
  44 #include "sim/sim.h"
  45 #include "sim-config.h"
  46 #include "sim-types.h"
  47
  48 /* FIXME: CR16 defines */
  49 typedef uint16_t reg_t;
  50 typedef uint32_t creg_t;
  51
  52 struct simops
  53 {
  54   char mnemonic[12];
  55   uint32_t size;
  56   uint32_t mask;
  57   uint32_t opcode;
  58   int format;
  59   char fname[12];
  60   void (*func)(SIM_DESC, SIM_CPU *);
  61   int numops;
  62   operand_desc operands[4];
  63 };
  64
  65 enum _ins_type
  66 {
  67    INS_UNKNOWN,                 /* unknown instruction */
  68    INS_NO_TYPE_INS,
  69    INS_ARITH_INS,
  70    INS_LD_STOR_INS,
  71    INS_BRANCH_INS,
  72    INS_ARITH_BYTE_INS,
  73    INS_SHIFT_INS,
  74    INS_BRANCH_NEQ_INS,
  75    INS_STOR_IMM_INS,
  76    INS_CSTBIT_INS,
  77    INS_MAX
  78 };
  79
  80 extern unsigned long ins_type_counters[ (int)INS_MAX ];
  81
  82 enum {
  83   SP_IDX = 15,
  84 };
  85
  86 /* Write-back slots */
  87 union slot_data {
  88   unsigned_1 _1;
  89   unsigned_2 _2;
  90   unsigned_4 _4;
  91 };
  92 struct slot {
  93   void *dest;
  94   int size;
  95   union slot_data data;
  96   union slot_data mask;
  97 };
  98 enum {
  99  NR_SLOTS = 16
 100 };
 101 #define SLOT (State.slot)
 102 #define SLOT_NR (State.slot_nr)
 103 #define SLOT_PEND_MASK(DEST, MSK, VAL) \
 104   do \
 105     { \
 106       SLOT[SLOT_NR].dest = &(DEST); \
 107       SLOT[SLOT_NR].size = sizeof (DEST); \
 108       switch (sizeof (DEST)) \
 109         { \
 110         case 1: \
 111           SLOT[SLOT_NR].data._1 = (unsigned_1) (VAL); \
 112           SLOT[SLOT_NR].mask._1 = (unsigned_1) (MSK); \
 113           break; \
 114         case 2: \
 115           SLOT[SLOT_NR].data._2 = (unsigned_2) (VAL); \
 116           SLOT[SLOT_NR].mask._2 = (unsigned_2) (MSK); \
 117           break; \
 118         case 4: \
 119           SLOT[SLOT_NR].data._4 = (unsigned_4) (VAL); \
 120           SLOT[SLOT_NR].mask._4 = (unsigned_4) (MSK); \
 121           break; \
 122         } \
 123       SLOT_NR = (SLOT_NR + 1); \
 124     } \
 125   while (0)
 126 #define SLOT_PEND(DEST, VAL) SLOT_PEND_MASK(DEST, 0, VAL)
 127 #define SLOT_DISCARD() (SLOT_NR = 0)
 128 #define SLOT_FLUSH() \
 129   do \
 130     { \
 131       int i; \
 132       for (i = 0; i < SLOT_NR; i++) \
 133         { \
 134           switch (SLOT[i].size) \
 135             { \
 136             case 1: \
 137               *(unsigned_1*) SLOT[i].dest &= SLOT[i].mask._1; \
 138               *(unsigned_1*) SLOT[i].dest |= SLOT[i].data._1; \
 139               break; \
 140             case 2: \
 141               *(unsigned_2*) SLOT[i].dest &= SLOT[i].mask._2; \
 142               *(unsigned_2*) SLOT[i].dest |= SLOT[i].data._2; \
 143               break; \
 144             case 4: \
 145               *(unsigned_4*) SLOT[i].dest &= SLOT[i].mask._4; \
 146               *(unsigned_4*) SLOT[i].dest |= SLOT[i].data._4; \
 147               break; \
 148             } \
 149         } \
 150       SLOT_NR = 0; \
 151     } \
 152   while (0)
 153 #define SLOT_DUMP() \
 154   do \
 155     { \
 156       int i; \
 157       for (i = 0; i < SLOT_NR; i++) \
 158         { \
 159           switch (SLOT[i].size) \
 160             { \
 161             case 1: \
 162               printf ("SLOT %d *0x%08lx & 0x%02x | 0x%02x\n", i, \
 163                       (long) SLOT[i].dest, \
 164                       (unsigned) SLOT[i].mask._1, \
 165                       (unsigned) SLOT[i].data._1); \
 166               break; \
 167             case 2: \
 168               printf ("SLOT %d *0x%08lx & 0x%04x | 0x%04x\n", i, \
 169                       (long) SLOT[i].dest, \
 170                       (unsigned) SLOT[i].mask._2, \
 171                       (unsigned) SLOT[i].data._2); \
 172               break; \
 173             case 4: \
 174               printf ("SLOT %d *0x%08lx & 0x%08x | 0x%08x\n", i, \
 175                       (long) SLOT[i].dest, \
 176                       (unsigned) SLOT[i].mask._4, \
 177                       (unsigned) SLOT[i].data._4); \
 178               break; \
 179             case 8: \
 180               printf ("SLOT %d *0x%08lx & 0x%08x%08x | 0x%08x%08x\n", i, \
 181                       (long) SLOT[i].dest, \
 182                       (unsigned) (SLOT[i].mask._8 >> 32),  \
 183                       (unsigned) SLOT[i].mask._8, \
 184                       (unsigned) (SLOT[i].data._8 >> 32),  \
 185                       (unsigned) SLOT[i].data._8); \
 186               break; \
 187             } \
 188         } \
 189     } \
 190   while (0)
 191
 192 struct _state
 193 {
 194   creg_t regs[16];              /* general-purpose registers */
 195 #define GPR(N) (State.regs[(N)] + 0)
 196 #define SET_GPR(N,VAL) (State.regs[(N)] = (VAL))
 197
 198 #define GPR32(N) \
 199      (N < 12) ? \
 200      ((((uint16_t) State.regs[(N) + 1]) << 16) | (uint16_t) State.regs[(N)]) \
 201      : GPR (N)
 202
 203 #define SET_GPR32(N,VAL) do { \
 204      if (N < 11)  \
 205        { SET_GPR (N + 1, (VAL) >> 16); SET_GPR (N, ((VAL) & 0xffff));} \
 206      else { if ( N == 11) \
 207              { SET_GPR (N + 1, ((GPR32 (12)) & 0xffff0000)|((VAL) >> 16)); \
 208                SET_GPR (N, ((VAL) & 0xffff));} \
 209             else SET_GPR (N, (VAL));} \
 210     } while (0)
 211
 212   creg_t cregs[16];             /* control registers */
 213 #define CREG(N) (State.cregs[(N)] + 0)
 214 #define SET_CREG(N,VAL) move_to_cr (sd, cpu, (N), 0, (VAL), 0)
 215 #define SET_HW_CREG(N,VAL) move_to_cr (sd, cpu, (N), 0, (VAL), 1)
 216
 217   reg_t sp[2];                  /* holding area for SPI(0)/SPU(1) */
 218 #define HELD_SP(N) (State.sp[(N)] + 0)
 219 #define SET_HELD_SP(N,VAL) SLOT_PEND (State.sp[(N)], (VAL))
 220
 221   /* writeback info */
 222   struct slot slot[NR_SLOTS];
 223   int slot_nr;
 224
 225   /* trace data */
 226   struct {
 227     uint16_t psw;
 228   } trace;
 229
 230   int   pc_changed;
 231
 232   /* NOTE: everything below this line is not reset by
 233      sim_create_inferior() */
 234
 235   enum _ins_type ins_type;
 236
 237 };
 238
 239 extern struct _state State;
 240
 241
 242 extern uint32_t OP[4];
 243 extern uint32_t sign_flag;
 244 extern struct simops Simops[];
 245
 246 enum
 247 {
 248   PC_CR   = 0,
 249   BDS_CR  = 1,
 250   BSR_CR  = 2,
 251   DCR_CR  = 3,
 252   CAR0_CR = 5,
 253   CAR1_CR = 7,
 254   CFG_CR  = 9,
 255   PSR_CR  = 10,
 256   INTBASE_CR = 11,
 257   ISP_CR = 13,
 258   USP_CR = 15
 259 };
 260
 261 enum
 262 {
 263   PSR_I_BIT = 0x0800,
 264   PSR_P_BIT = 0x0400,
 265   PSR_E_BIT = 0x0200,
 266   PSR_N_BIT = 0x0080,
 267   PSR_Z_BIT = 0x0040,
 268   PSR_F_BIT = 0x0020,
 269   PSR_U_BIT = 0x0008,
 270   PSR_L_BIT = 0x0004,
 271   PSR_T_BIT = 0x0002,
 272   PSR_C_BIT = 0x0001
 273 };
 274
 275 #define PSR CREG (PSR_CR)
 276 #define SET_PSR(VAL) SET_CREG (PSR_CR, (VAL))
 277 #define SET_HW_PSR(VAL) SET_HW_CREG (PSR_CR, (VAL))
 278 #define SET_PSR_BIT(MASK,VAL) move_to_cr (sd, cpu, PSR_CR, ~((creg_t) MASK), (VAL) ? (MASK) : 0, 1)
 279
 280 #define PSR_SM ((PSR & PSR_SM_BIT) != 0)
 281 #define SET_PSR_SM(VAL) SET_PSR_BIT (PSR_SM_BIT, (VAL))
 282
 283 #define PSR_I ((PSR & PSR_I_BIT) != 0)
 284 #define SET_PSR_I(VAL) SET_PSR_BIT (PSR_I_BIT, (VAL))
 285
 286 #define PSR_DB ((PSR & PSR_DB_BIT) != 0)
 287 #define SET_PSR_DB(VAL) SET_PSR_BIT (PSR_DB_BIT, (VAL))
 288
 289 #define PSR_P ((PSR & PSR_P_BIT) != 0)
 290 #define SET_PSR_P(VAL) SET_PSR_BIT (PSR_P_BIT, (VAL))
 291
 292 #define PSR_E ((PSR & PSR_E_BIT) != 0)
 293 #define SET_PSR_E(VAL) SET_PSR_BIT (PSR_E_BIT, (VAL))
 294
 295 #define PSR_N ((PSR & PSR_N_BIT) != 0)
 296 #define SET_PSR_N(VAL) SET_PSR_BIT (PSR_N_BIT, (VAL))
 297
 298 #define PSR_Z ((PSR & PSR_Z_BIT) != 0)
 299 #define SET_PSR_Z(VAL) SET_PSR_BIT (PSR_Z_BIT, (VAL))
 300
 301 #define PSR_F ((PSR & PSR_F_BIT) != 0)
 302 #define SET_PSR_F(VAL) SET_PSR_BIT (PSR_F_BIT, (VAL))
 303
 304 #define PSR_U ((PSR & PSR_U_BIT) != 0)
 305 #define SET_PSR_U(VAL) SET_PSR_BIT (PSR_U_BIT, (VAL))
 306
 307 #define PSR_L ((PSR & PSR_L_BIT) != 0)
 308 #define SET_PSR_L(VAL) SET_PSR_BIT (PSR_L_BIT, (VAL))
 309
 310 #define PSR_T ((PSR & PSR_T_BIT) != 0)
 311 #define SET_PSR_T(VAL) SET_PSR_BIT (PSR_T_BIT, (VAL))
 312
 313 #define PSR_C ((PSR & PSR_C_BIT) != 0)
 314 #define SET_PSR_C(VAL) SET_PSR_BIT (PSR_C_BIT, (VAL))
 315
 316 /* See simopsc.:move_to_cr() for registers that can not be read-from
 317    or assigned-to directly */
 318
 319 #define PC      CREG (PC_CR)
 320 #define SET_PC(VAL) SET_CREG (PC_CR, (VAL))
 321 //#define SET_PC(VAL) (State.cregs[PC_CR] = (VAL))
 322
 323 #define BPSR    CREG (BPSR_CR)
 324 #define SET_BPSR(VAL) SET_CREG (BPSR_CR, (VAL))
 325
 326 #define BPC     CREG (BPC_CR)
 327 #define SET_BPC(VAL) SET_CREG (BPC_CR, (VAL))
 328
 329 #define DPSR    CREG (DPSR_CR)
 330 #define SET_DPSR(VAL) SET_CREG (DPSR_CR, (VAL))
 331
 332 #define DPC     CREG (DPC_CR)
 333 #define SET_DPC(VAL) SET_CREG (DPC_CR, (VAL))
 334
 335 #define RPT_C   CREG (RPT_C_CR)
 336 #define SET_RPT_C(VAL) SET_CREG (RPT_C_CR, (VAL))
 337
 338 #define RPT_S   CREG (RPT_S_CR)
 339 #define SET_RPT_S(VAL) SET_CREG (RPT_S_CR, (VAL))
 340
 341 #define RPT_E   CREG (RPT_E_CR)
 342 #define SET_RPT_E(VAL) SET_CREG (RPT_E_CR, (VAL))
 343
 344 #define MOD_S   CREG (MOD_S_CR)
 345 #define SET_MOD_S(VAL) SET_CREG (MOD_S_CR, (VAL))
 346
 347 #define MOD_E   CREG (MOD_E_CR)
 348 #define SET_MOD_E(VAL) SET_CREG (MOD_E_CR, (VAL))
 349
 350 #define IBA     CREG (IBA_CR)
 351 #define SET_IBA(VAL) SET_CREG (IBA_CR, (VAL))
 352
 353
 354 #define SIG_CR16_STOP   -1
 355 #define SIG_CR16_EXIT   -2
 356 #define SIG_CR16_BUS    -3
 357 #define SIG_CR16_IAD    -4
 358
 359 /* TODO: Resolve conflicts with common headers.  */
 360 #undef SEXT8
 361 #undef SEXT16
 362 #undef SEXT32
 363
 364 #define SEXT3(x)        ((((x)&0x7)^(~3))+4)
 365
 366 /* sign-extend a 4-bit number */
 367 #define SEXT4(x)        ((((x)&0xf)^(~7))+8)
 368
 369 /* sign-extend an 8-bit number */
 370 #define SEXT8(x)        ((((x)&0xff)^(~0x7f))+0x80)
 371
 372 /* sign-extend a 16-bit number */
 373 #define SEXT16(x)       ((((x)&0xffff)^(~0x7fff))+0x8000)
 374
 375 /* sign-extend a 24-bit number */
 376 #define SEXT24(x)       ((((x)&0xffffff)^(~0x7fffff))+0x800000)
 377
 378 /* sign-extend a 32-bit number */
 379 #define SEXT32(x)       ((((x)&0xffffffff)^(~0x7fffffff))+0x80000000)
 380
 381 #define SB(addr, data)          sim_core_write_1 (cpu, PC, read_map, addr, data)
 382 #define RB(addr)                sim_core_read_1 (cpu, PC, read_map, addr)
 383 #define SW(addr, data)          sim_core_write_unaligned_2 (cpu, PC, read_map, addr, data)
 384 #define RW(addr)                sim_core_read_unaligned_2 (cpu, PC, read_map, addr)
 385 #define SLW(addr, data)         sim_core_write_unaligned_4 (cpu, PC, read_map, addr, data)
 386
 387 /* Yes, this is as whacked as it looks.  The sim currently reads little endian
 388    for 16 bits, but then merge them like big endian to get 32 bits.  */
 389 static inline uint32_t get_longword (SIM_CPU *cpu, address_word addr)
 390 {
 391   return (RW (addr) << 16) | RW (addr + 2);
 392 }
 393 #define RLW(addr)               get_longword (cpu, addr)
 394
 395 #define JMP(x)                  do { SET_PC (x); State.pc_changed = 1; } while (0)
 396
 397 #define RIE_VECTOR_START  0xffc2
 398 #define AE_VECTOR_START   0xffc3
 399 #define TRAP_VECTOR_START 0xffc4        /* vector for trap 0 */
 400 #define DBT_VECTOR_START  0xffd4
 401 #define SDBT_VECTOR_START 0xffd5
 402
 403 #define INT_VECTOR_START   0xFFFE00 /*maskable interrupt - mapped to ICU */
 404 #define NMI_VECTOR_START   0xFFFF00 /*non-maskable interrupt;for observability*/
 405 #define ISE_VECTOR_START   0xFFFC00 /*in-system emulation trap */
 406 #define ADBG_VECTOR_START  0xFFFC02 /*alternate debug trap */
 407 #define ATRC_VECTOR_START  0xFFFC0C /*alternate trace trap */
 408 #define ABPT_VECTOR_START  0xFFFC0E /*alternate break point trap */
 409
 410
 411 /* Scedule a store of VAL into cr[CR].  MASK indicates the bits in
 412    cr[CR] that should not be modified (i.e. cr[CR] = (cr[CR] & MASK) |
 413    (VAL & ~MASK)).  In addition, unless PSR_HW_P, a VAL intended for
 414    PSR is masked for zero bits. */
 415
 416 extern creg_t move_to_cr (SIM_DESC, SIM_CPU *, int cr, creg_t mask, creg_t val, int psw_hw_p);
 417
 418 #ifndef SIGTRAP
 419 #define SIGTRAP 5
 420 #endif
 421 /* Special purpose trap  */
 422 #define TRAP_BREAKPOINT 8