git.sesse.net Git - pistorm/blob - m68kcpu.c

   1 /* ======================================================================== */
   2 /* ========================= LICENSING & COPYRIGHT ======================== */
   3 /* ======================================================================== */
   4 /*
   5  *                                  MUSASHI
   6  *                                Version 4.60
   7  *
   8  * A portable Motorola M680x0 processor emulation engine.
   9  * Copyright Karl Stenerud.  All rights reserved.
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a copy
  12  * of this software and associated documentation files (the "Software"), to deal
  13  * in the Software without restriction, including without limitation the rights
  14  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  15  * copies of the Software, and to permit persons to whom the Software is
  16  * furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included in
  19  * all copies or substantial portions of the Software.
  20
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  24  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  25  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  26  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  27  * THE SOFTWARE.
  28  */
  29
  30
  31 /* ======================================================================== */
  32 /* ================================= NOTES ================================ */
  33 /* ======================================================================== */
  34
  35
  36
  37 /* ======================================================================== */
  38 /* ================================ INCLUDES ============================== */
  39 /* ======================================================================== */
  40
  41 extern void m68040_fpu_op0(void);
  42 extern void m68040_fpu_op1(void);
  43 extern void m68881_mmu_ops();
  44 extern unsigned char m68ki_cycles[][0x10000];
  45 extern void (*m68ki_instruction_jump_table[0x10000])(void); /* opcode handler jump table */
  46 extern void m68ki_build_opcode_table(void);
  47
  48 #include "m68kops.h"
  49 #include "m68kcpu.h"
  50
  51 #include "m68kfpu.c"
  52 #include "m68kmmu.h" // uses some functions from m68kfpu.c which are static !
  53
  54 /* ======================================================================== */
  55 /* ================================= DATA ================================= */
  56 /* ======================================================================== */
  57
  58 int  m68ki_initial_cycles;
  59 int  m68ki_remaining_cycles = 0;                     /* Number of clocks remaining */
  60 uint m68ki_tracing = 0;
  61 uint m68ki_address_space;
  62
  63 #ifdef M68K_LOG_ENABLE
  64 const char *const m68ki_cpu_names[] =
  65 {
  66         "Invalid CPU",
  67         "M68000",
  68         "M68010",
  69         "Invalid CPU",
  70         "M68EC020"
  71         "Invalid CPU",
  72         "Invalid CPU",
  73         "Invalid CPU",
  74         "M68020"
  75 };
  76 #endif /* M68K_LOG_ENABLE */
  77
  78 /* The CPU core */
  79 m68ki_cpu_core m68ki_cpu = {0};
  80
  81 #if M68K_EMULATE_ADDRESS_ERROR
  82 #ifdef _BSD_SETJMP_H
  83 sigjmp_buf m68ki_aerr_trap;
  84 #else
  85 jmp_buf m68ki_aerr_trap;
  86 #endif
  87 #endif /* M68K_EMULATE_ADDRESS_ERROR */
  88
  89 uint    m68ki_aerr_address;
  90 uint    m68ki_aerr_write_mode;
  91 uint    m68ki_aerr_fc;
  92
  93 jmp_buf m68ki_bus_error_jmp_buf;
  94
  95 /* Used by shift & rotate instructions */
  96 const uint8 m68ki_shift_8_table[65] =
  97 {
  98         0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff, 0xff, 0xff, 0xff,
  99         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 100         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 101         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 102         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 103         0xff, 0xff, 0xff, 0xff, 0xff
 104 };
 105 const uint16 m68ki_shift_16_table[65] =
 106 {
 107         0x0000, 0x8000, 0xc000, 0xe000, 0xf000, 0xf800, 0xfc00, 0xfe00, 0xff00,
 108         0xff80, 0xffc0, 0xffe0, 0xfff0, 0xfff8, 0xfffc, 0xfffe, 0xffff, 0xffff,
 109         0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 110         0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 111         0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 112         0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 113         0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 114         0xffff, 0xffff
 115 };
 116 const uint m68ki_shift_32_table[65] =
 117 {
 118         0x00000000, 0x80000000, 0xc0000000, 0xe0000000, 0xf0000000, 0xf8000000,
 119         0xfc000000, 0xfe000000, 0xff000000, 0xff800000, 0xffc00000, 0xffe00000,
 120         0xfff00000, 0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000, 0xffff8000,
 121         0xffffc000, 0xffffe000, 0xfffff000, 0xfffff800, 0xfffffc00, 0xfffffe00,
 122         0xffffff00, 0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0, 0xfffffff8,
 123         0xfffffffc, 0xfffffffe, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 124         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 125         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 126         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 127         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 128         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff
 129 };
 130
 131
 132 /* Number of clock cycles to use for exception processing.
 133  * I used 4 for any vectors that are undocumented for processing times.
 134  */
 135 const uint8 m68ki_exception_cycle_table[5][256] =
 136 {
 137         { /* 000 */
 138                  40, /*  0: Reset - Initial Stack Pointer                      */
 139                   4, /*  1: Reset - Initial Program Counter                    */
 140                  50, /*  2: Bus Error                             (unemulated) */
 141                  50, /*  3: Address Error                         (unemulated) */
 142                  34, /*  4: Illegal Instruction                                */
 143                  38, /*  5: Divide by Zero                                     */
 144                  40, /*  6: CHK                                                */
 145                  34, /*  7: TRAPV                                              */
 146                  34, /*  8: Privilege Violation                                */
 147                  34, /*  9: Trace                                              */
 148                  34, /* 10: 1010                                               */
 149                  34, /* 11: 1111                                               */
 150                   4, /* 12: RESERVED                                           */
 151                   4, /* 13: Coprocessor Protocol Violation        (unemulated) */
 152                   4, /* 14: Format Error                                       */
 153                  44, /* 15: Uninitialized Interrupt                            */
 154                   4, /* 16: RESERVED                                           */
 155                   4, /* 17: RESERVED                                           */
 156                   4, /* 18: RESERVED                                           */
 157                   4, /* 19: RESERVED                                           */
 158                   4, /* 20: RESERVED                                           */
 159                   4, /* 21: RESERVED                                           */
 160                   4, /* 22: RESERVED                                           */
 161                   4, /* 23: RESERVED                                           */
 162                  44, /* 24: Spurious Interrupt                                 */
 163                  44, /* 25: Level 1 Interrupt Autovector                       */
 164                  44, /* 26: Level 2 Interrupt Autovector                       */
 165                  44, /* 27: Level 3 Interrupt Autovector                       */
 166                  44, /* 28: Level 4 Interrupt Autovector                       */
 167                  44, /* 29: Level 5 Interrupt Autovector                       */
 168                  44, /* 30: Level 6 Interrupt Autovector                       */
 169                  44, /* 31: Level 7 Interrupt Autovector                       */
 170                  34, /* 32: TRAP #0                                            */
 171                  34, /* 33: TRAP #1                                            */
 172                  34, /* 34: TRAP #2                                            */
 173                  34, /* 35: TRAP #3                                            */
 174                  34, /* 36: TRAP #4                                            */
 175                  34, /* 37: TRAP #5                                            */
 176                  34, /* 38: TRAP #6                                            */
 177                  34, /* 39: TRAP #7                                            */
 178                  34, /* 40: TRAP #8                                            */
 179                  34, /* 41: TRAP #9                                            */
 180                  34, /* 42: TRAP #10                                           */
 181                  34, /* 43: TRAP #11                                           */
 182                  34, /* 44: TRAP #12                                           */
 183                  34, /* 45: TRAP #13                                           */
 184                  34, /* 46: TRAP #14                                           */
 185                  34, /* 47: TRAP #15                                           */
 186                   4, /* 48: FP Branch or Set on Unknown Condition (unemulated) */
 187                   4, /* 49: FP Inexact Result                     (unemulated) */
 188                   4, /* 50: FP Divide by Zero                     (unemulated) */
 189                   4, /* 51: FP Underflow                          (unemulated) */
 190                   4, /* 52: FP Operand Error                      (unemulated) */
 191                   4, /* 53: FP Overflow                           (unemulated) */
 192                   4, /* 54: FP Signaling NAN                      (unemulated) */
 193                   4, /* 55: FP Unimplemented Data Type            (unemulated) */
 194                   4, /* 56: MMU Configuration Error               (unemulated) */
 195                   4, /* 57: MMU Illegal Operation Error           (unemulated) */
 196                   4, /* 58: MMU Access Level Violation Error      (unemulated) */
 197                   4, /* 59: RESERVED                                           */
 198                   4, /* 60: RESERVED                                           */
 199                   4, /* 61: RESERVED                                           */
 200                   4, /* 62: RESERVED                                           */
 201                   4, /* 63: RESERVED                                           */
 202                      /* 64-255: User Defined                                   */
 203                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 204                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 205                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 206                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 207                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 208                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
 209         },
 210         { /* 010 */
 211                  40, /*  0: Reset - Initial Stack Pointer                      */
 212                   4, /*  1: Reset - Initial Program Counter                    */
 213                 126, /*  2: Bus Error                             (unemulated) */
 214                 126, /*  3: Address Error                         (unemulated) */
 215                  38, /*  4: Illegal Instruction                                */
 216                  44, /*  5: Divide by Zero                                     */
 217                  44, /*  6: CHK                                                */
 218                  34, /*  7: TRAPV                                              */
 219                  38, /*  8: Privilege Violation                                */
 220                  38, /*  9: Trace                                              */
 221                   4, /* 10: 1010                                               */
 222                   4, /* 11: 1111                                               */
 223                   4, /* 12: RESERVED                                           */
 224                   4, /* 13: Coprocessor Protocol Violation        (unemulated) */
 225                   4, /* 14: Format Error                                       */
 226                  44, /* 15: Uninitialized Interrupt                            */
 227                   4, /* 16: RESERVED                                           */
 228                   4, /* 17: RESERVED                                           */
 229                   4, /* 18: RESERVED                                           */
 230                   4, /* 19: RESERVED                                           */
 231                   4, /* 20: RESERVED                                           */
 232                   4, /* 21: RESERVED                                           */
 233                   4, /* 22: RESERVED                                           */
 234                   4, /* 23: RESERVED                                           */
 235                  46, /* 24: Spurious Interrupt                                 */
 236                  46, /* 25: Level 1 Interrupt Autovector                       */
 237                  46, /* 26: Level 2 Interrupt Autovector                       */
 238                  46, /* 27: Level 3 Interrupt Autovector                       */
 239                  46, /* 28: Level 4 Interrupt Autovector                       */
 240                  46, /* 29: Level 5 Interrupt Autovector                       */
 241                  46, /* 30: Level 6 Interrupt Autovector                       */
 242                  46, /* 31: Level 7 Interrupt Autovector                       */
 243                  38, /* 32: TRAP #0                                            */
 244                  38, /* 33: TRAP #1                                            */
 245                  38, /* 34: TRAP #2                                            */
 246                  38, /* 35: TRAP #3                                            */
 247                  38, /* 36: TRAP #4                                            */
 248                  38, /* 37: TRAP #5                                            */
 249                  38, /* 38: TRAP #6                                            */
 250                  38, /* 39: TRAP #7                                            */
 251                  38, /* 40: TRAP #8                                            */
 252                  38, /* 41: TRAP #9                                            */
 253                  38, /* 42: TRAP #10                                           */
 254                  38, /* 43: TRAP #11                                           */
 255                  38, /* 44: TRAP #12                                           */
 256                  38, /* 45: TRAP #13                                           */
 257                  38, /* 46: TRAP #14                                           */
 258                  38, /* 47: TRAP #15                                           */
 259                   4, /* 48: FP Branch or Set on Unknown Condition (unemulated) */
 260                   4, /* 49: FP Inexact Result                     (unemulated) */
 261                   4, /* 50: FP Divide by Zero                     (unemulated) */
 262                   4, /* 51: FP Underflow                          (unemulated) */
 263                   4, /* 52: FP Operand Error                      (unemulated) */
 264                   4, /* 53: FP Overflow                           (unemulated) */
 265                   4, /* 54: FP Signaling NAN                      (unemulated) */
 266                   4, /* 55: FP Unimplemented Data Type            (unemulated) */
 267                   4, /* 56: MMU Configuration Error               (unemulated) */
 268                   4, /* 57: MMU Illegal Operation Error           (unemulated) */
 269                   4, /* 58: MMU Access Level Violation Error      (unemulated) */
 270                   4, /* 59: RESERVED                                           */
 271                   4, /* 60: RESERVED                                           */
 272                   4, /* 61: RESERVED                                           */
 273                   4, /* 62: RESERVED                                           */
 274                   4, /* 63: RESERVED                                           */
 275                      /* 64-255: User Defined                                   */
 276                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 277                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 278                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 279                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 280                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 281                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
 282         },
 283         { /* 020 */
 284                   4, /*  0: Reset - Initial Stack Pointer                      */
 285                   4, /*  1: Reset - Initial Program Counter                    */
 286                  50, /*  2: Bus Error                             (unemulated) */
 287                  50, /*  3: Address Error                         (unemulated) */
 288                  20, /*  4: Illegal Instruction                                */
 289                  38, /*  5: Divide by Zero                                     */
 290                  40, /*  6: CHK                                                */
 291                  20, /*  7: TRAPV                                              */
 292                  34, /*  8: Privilege Violation                                */
 293                  25, /*  9: Trace                                              */
 294                  20, /* 10: 1010                                               */
 295                  20, /* 11: 1111                                               */
 296                   4, /* 12: RESERVED                                           */
 297                   4, /* 13: Coprocessor Protocol Violation        (unemulated) */
 298                   4, /* 14: Format Error                                       */
 299                  30, /* 15: Uninitialized Interrupt                            */
 300                   4, /* 16: RESERVED                                           */
 301                   4, /* 17: RESERVED                                           */
 302                   4, /* 18: RESERVED                                           */
 303                   4, /* 19: RESERVED                                           */
 304                   4, /* 20: RESERVED                                           */
 305                   4, /* 21: RESERVED                                           */
 306                   4, /* 22: RESERVED                                           */
 307                   4, /* 23: RESERVED                                           */
 308                  30, /* 24: Spurious Interrupt                                 */
 309                  30, /* 25: Level 1 Interrupt Autovector                       */
 310                  30, /* 26: Level 2 Interrupt Autovector                       */
 311                  30, /* 27: Level 3 Interrupt Autovector                       */
 312                  30, /* 28: Level 4 Interrupt Autovector                       */
 313                  30, /* 29: Level 5 Interrupt Autovector                       */
 314                  30, /* 30: Level 6 Interrupt Autovector                       */
 315                  30, /* 31: Level 7 Interrupt Autovector                       */
 316                  20, /* 32: TRAP #0                                            */
 317                  20, /* 33: TRAP #1                                            */
 318                  20, /* 34: TRAP #2                                            */
 319                  20, /* 35: TRAP #3                                            */
 320                  20, /* 36: TRAP #4                                            */
 321                  20, /* 37: TRAP #5                                            */
 322                  20, /* 38: TRAP #6                                            */
 323                  20, /* 39: TRAP #7                                            */
 324                  20, /* 40: TRAP #8                                            */
 325                  20, /* 41: TRAP #9                                            */
 326                  20, /* 42: TRAP #10                                           */
 327                  20, /* 43: TRAP #11                                           */
 328                  20, /* 44: TRAP #12                                           */
 329                  20, /* 45: TRAP #13                                           */
 330                  20, /* 46: TRAP #14                                           */
 331                  20, /* 47: TRAP #15                                           */
 332                   4, /* 48: FP Branch or Set on Unknown Condition (unemulated) */
 333                   4, /* 49: FP Inexact Result                     (unemulated) */
 334                   4, /* 50: FP Divide by Zero                     (unemulated) */
 335                   4, /* 51: FP Underflow                          (unemulated) */
 336                   4, /* 52: FP Operand Error                      (unemulated) */
 337                   4, /* 53: FP Overflow                           (unemulated) */
 338                   4, /* 54: FP Signaling NAN                      (unemulated) */
 339                   4, /* 55: FP Unimplemented Data Type            (unemulated) */
 340                   4, /* 56: MMU Configuration Error               (unemulated) */
 341                   4, /* 57: MMU Illegal Operation Error           (unemulated) */
 342                   4, /* 58: MMU Access Level Violation Error      (unemulated) */
 343                   4, /* 59: RESERVED                                           */
 344                   4, /* 60: RESERVED                                           */
 345                   4, /* 61: RESERVED                                           */
 346                   4, /* 62: RESERVED                                           */
 347                   4, /* 63: RESERVED                                           */
 348                      /* 64-255: User Defined                                   */
 349                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 350                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 351                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 352                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 353                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 354                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
 355         },
 356         { /* 030 - not correct */
 357                   4, /*  0: Reset - Initial Stack Pointer                      */
 358                   4, /*  1: Reset - Initial Program Counter                    */
 359                  50, /*  2: Bus Error                             (unemulated) */
 360                  50, /*  3: Address Error                         (unemulated) */
 361                  20, /*  4: Illegal Instruction                                */
 362                  38, /*  5: Divide by Zero                                     */
 363                  40, /*  6: CHK                                                */
 364                  20, /*  7: TRAPV                                              */
 365                  34, /*  8: Privilege Violation                                */
 366                  25, /*  9: Trace                                              */
 367                  20, /* 10: 1010                                               */
 368                  20, /* 11: 1111                                               */
 369                   4, /* 12: RESERVED                                           */
 370                   4, /* 13: Coprocessor Protocol Violation        (unemulated) */
 371                   4, /* 14: Format Error                                       */
 372                  30, /* 15: Uninitialized Interrupt                            */
 373                   4, /* 16: RESERVED                                           */
 374                   4, /* 17: RESERVED                                           */
 375                   4, /* 18: RESERVED                                           */
 376                   4, /* 19: RESERVED                                           */
 377                   4, /* 20: RESERVED                                           */
 378                   4, /* 21: RESERVED                                           */
 379                   4, /* 22: RESERVED                                           */
 380                   4, /* 23: RESERVED                                           */
 381                  30, /* 24: Spurious Interrupt                                 */
 382                  30, /* 25: Level 1 Interrupt Autovector                       */
 383                  30, /* 26: Level 2 Interrupt Autovector                       */
 384                  30, /* 27: Level 3 Interrupt Autovector                       */
 385                  30, /* 28: Level 4 Interrupt Autovector                       */
 386                  30, /* 29: Level 5 Interrupt Autovector                       */
 387                  30, /* 30: Level 6 Interrupt Autovector                       */
 388                  30, /* 31: Level 7 Interrupt Autovector                       */
 389                  20, /* 32: TRAP #0                                            */
 390                  20, /* 33: TRAP #1                                            */
 391                  20, /* 34: TRAP #2                                            */
 392                  20, /* 35: TRAP #3                                            */
 393                  20, /* 36: TRAP #4                                            */
 394                  20, /* 37: TRAP #5                                            */
 395                  20, /* 38: TRAP #6                                            */
 396                  20, /* 39: TRAP #7                                            */
 397                  20, /* 40: TRAP #8                                            */
 398                  20, /* 41: TRAP #9                                            */
 399                  20, /* 42: TRAP #10                                           */
 400                  20, /* 43: TRAP #11                                           */
 401                  20, /* 44: TRAP #12                                           */
 402                  20, /* 45: TRAP #13                                           */
 403                  20, /* 46: TRAP #14                                           */
 404                  20, /* 47: TRAP #15                                           */
 405                   4, /* 48: FP Branch or Set on Unknown Condition (unemulated) */
 406                   4, /* 49: FP Inexact Result                     (unemulated) */
 407                   4, /* 50: FP Divide by Zero                     (unemulated) */
 408                   4, /* 51: FP Underflow                          (unemulated) */
 409                   4, /* 52: FP Operand Error                      (unemulated) */
 410                   4, /* 53: FP Overflow                           (unemulated) */
 411                   4, /* 54: FP Signaling NAN                      (unemulated) */
 412                   4, /* 55: FP Unimplemented Data Type            (unemulated) */
 413                   4, /* 56: MMU Configuration Error               (unemulated) */
 414                   4, /* 57: MMU Illegal Operation Error           (unemulated) */
 415                   4, /* 58: MMU Access Level Violation Error      (unemulated) */
 416                   4, /* 59: RESERVED                                           */
 417                   4, /* 60: RESERVED                                           */
 418                   4, /* 61: RESERVED                                           */
 419                   4, /* 62: RESERVED                                           */
 420                   4, /* 63: RESERVED                                           */
 421                      /* 64-255: User Defined                                   */
 422                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 423                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 424                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 425                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 426                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 427                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
 428         },
 429         { /* 040 */ // TODO: these values are not correct
 430                   4, /*  0: Reset - Initial Stack Pointer                      */
 431                   4, /*  1: Reset - Initial Program Counter                    */
 432                  50, /*  2: Bus Error                             (unemulated) */
 433                  50, /*  3: Address Error                         (unemulated) */
 434                  20, /*  4: Illegal Instruction                                */
 435                  38, /*  5: Divide by Zero                                     */
 436                  40, /*  6: CHK                                                */
 437                  20, /*  7: TRAPV                                              */
 438                  34, /*  8: Privilege Violation                                */
 439                  25, /*  9: Trace                                              */
 440                  20, /* 10: 1010                                               */
 441                  20, /* 11: 1111                                               */
 442                   4, /* 12: RESERVED                                           */
 443                   4, /* 13: Coprocessor Protocol Violation        (unemulated) */
 444                   4, /* 14: Format Error                                       */
 445                  30, /* 15: Uninitialized Interrupt                            */
 446                   4, /* 16: RESERVED                                           */
 447                   4, /* 17: RESERVED                                           */
 448                   4, /* 18: RESERVED                                           */
 449                   4, /* 19: RESERVED                                           */
 450                   4, /* 20: RESERVED                                           */
 451                   4, /* 21: RESERVED                                           */
 452                   4, /* 22: RESERVED                                           */
 453                   4, /* 23: RESERVED                                           */
 454                  30, /* 24: Spurious Interrupt                                 */
 455                  30, /* 25: Level 1 Interrupt Autovector                       */
 456                  30, /* 26: Level 2 Interrupt Autovector                       */
 457                  30, /* 27: Level 3 Interrupt Autovector                       */
 458                  30, /* 28: Level 4 Interrupt Autovector                       */
 459                  30, /* 29: Level 5 Interrupt Autovector                       */
 460                  30, /* 30: Level 6 Interrupt Autovector                       */
 461                  30, /* 31: Level 7 Interrupt Autovector                       */
 462                  20, /* 32: TRAP #0                                            */
 463                  20, /* 33: TRAP #1                                            */
 464                  20, /* 34: TRAP #2                                            */
 465                  20, /* 35: TRAP #3                                            */
 466                  20, /* 36: TRAP #4                                            */
 467                  20, /* 37: TRAP #5                                            */
 468                  20, /* 38: TRAP #6                                            */
 469                  20, /* 39: TRAP #7                                            */
 470                  20, /* 40: TRAP #8                                            */
 471                  20, /* 41: TRAP #9                                            */
 472                  20, /* 42: TRAP #10                                           */
 473                  20, /* 43: TRAP #11                                           */
 474                  20, /* 44: TRAP #12                                           */
 475                  20, /* 45: TRAP #13                                           */
 476                  20, /* 46: TRAP #14                                           */
 477                  20, /* 47: TRAP #15                                           */
 478                   4, /* 48: FP Branch or Set on Unknown Condition (unemulated) */
 479                   4, /* 49: FP Inexact Result                     (unemulated) */
 480                   4, /* 50: FP Divide by Zero                     (unemulated) */
 481                   4, /* 51: FP Underflow                          (unemulated) */
 482                   4, /* 52: FP Operand Error                      (unemulated) */
 483                   4, /* 53: FP Overflow                           (unemulated) */
 484                   4, /* 54: FP Signaling NAN                      (unemulated) */
 485                   4, /* 55: FP Unimplemented Data Type            (unemulated) */
 486                   4, /* 56: MMU Configuration Error               (unemulated) */
 487                   4, /* 57: MMU Illegal Operation Error           (unemulated) */
 488                   4, /* 58: MMU Access Level Violation Error      (unemulated) */
 489                   4, /* 59: RESERVED                                           */
 490                   4, /* 60: RESERVED                                           */
 491                   4, /* 61: RESERVED                                           */
 492                   4, /* 62: RESERVED                                           */
 493                   4, /* 63: RESERVED                                           */
 494                      /* 64-255: User Defined                                   */
 495                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 496                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 497                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 498                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 499                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
 500                   4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
 501         }
 502 };
 503
 504 const uint8 m68ki_ea_idx_cycle_table[64] =
 505 {
 506          0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
 507          0, /* ..01.000 no memory indirect, base NULL             */
 508          5, /* ..01..01 memory indirect,    base NULL, outer NULL */
 509          7, /* ..01..10 memory indirect,    base NULL, outer 16   */
 510          7, /* ..01..11 memory indirect,    base NULL, outer 32   */
 511          0,  5,  7,  7,  0,  5,  7,  7,  0,  5,  7,  7,
 512          2, /* ..10.000 no memory indirect, base 16               */
 513          7, /* ..10..01 memory indirect,    base 16,   outer NULL */
 514          9, /* ..10..10 memory indirect,    base 16,   outer 16   */
 515          9, /* ..10..11 memory indirect,    base 16,   outer 32   */
 516          0,  7,  9,  9,  0,  7,  9,  9,  0,  7,  9,  9,
 517          6, /* ..11.000 no memory indirect, base 32               */
 518         11, /* ..11..01 memory indirect,    base 32,   outer NULL */
 519         13, /* ..11..10 memory indirect,    base 32,   outer 16   */
 520         13, /* ..11..11 memory indirect,    base 32,   outer 32   */
 521          0, 11, 13, 13,  0, 11, 13, 13,  0, 11, 13, 13
 522 };
 523
 524
 525
 526 /* ======================================================================== */
 527 /* =============================== CALLBACKS ============================== */
 528 /* ======================================================================== */
 529
 530 /* Default callbacks used if the callback hasn't been set yet, or if the
 531  * callback is set to NULL
 532  */
 533
 534 /* Interrupt acknowledge */
 535 static int default_int_ack_callback_data;
 536 static int default_int_ack_callback(int int_level)
 537 {
 538         default_int_ack_callback_data = int_level;
 539         CPU_INT_LEVEL = 0;
 540         return M68K_INT_ACK_AUTOVECTOR;
 541 }
 542
 543 /* Breakpoint acknowledge */
 544 static unsigned int default_bkpt_ack_callback_data;
 545 static void default_bkpt_ack_callback(unsigned int data)
 546 {
 547         default_bkpt_ack_callback_data = data;
 548 }
 549
 550 /* Called when a reset instruction is executed */
 551 static void default_reset_instr_callback(void)
 552 {
 553 }
 554
 555 /* Called when a cmpi.l #v, dn instruction is executed */
 556 static void default_cmpild_instr_callback(unsigned int val, int reg)
 557 {
 558         (void)val;
 559         (void)reg;
 560 }
 561
 562 /* Called when a rte instruction is executed */
 563 static void default_rte_instr_callback(void)
 564 {
 565 }
 566
 567 /* Called when a tas instruction is executed */
 568 static int default_tas_instr_callback(void)
 569 {
 570         return 1; // allow writeback
 571 }
 572
 573 /* Called when an illegal instruction is encountered */
 574 static int default_illg_instr_callback(int opcode)
 575 {
 576         (void)opcode;
 577         return 0; // not handled : exception will occur
 578 }
 579
 580 /* Called when the program counter changed by a large value */
 581 static unsigned int default_pc_changed_callback_data;
 582 static void default_pc_changed_callback(unsigned int new_pc)
 583 {
 584         default_pc_changed_callback_data = new_pc;
 585 }
 586
 587 /* Called every time there's bus activity (read/write to/from memory */
 588 static unsigned int default_set_fc_callback_data;
 589 static void default_set_fc_callback(unsigned int new_fc)
 590 {
 591         default_set_fc_callback_data = new_fc;
 592 }
 593
 594 /* Called every instruction cycle prior to execution */
 595 static void default_instr_hook_callback(unsigned int pc)
 596 {
 597         (void)pc;
 598 }
 599
 600
 601 #if M68K_EMULATE_ADDRESS_ERROR
 602         #include <setjmp.h>
 603         #ifdef _BSD_SETJMP_H
 604         sigjmp_buf m68ki_aerr_trap;
 605         #else
 606         jmp_buf m68ki_aerr_trap;
 607         #endif
 608 #endif /* M68K_EMULATE_ADDRESS_ERROR */
 609
 610 /* ======================================================================== */
 611 /* ================================= API ================================== */
 612 /* ======================================================================== */
 613
 614 /* Access the internals of the CPU */
 615 unsigned int m68k_get_reg(void* context, m68k_register_t regnum)
 616 {
 617         m68ki_cpu_core* cpu = context != NULL ?(m68ki_cpu_core*)context : &m68ki_cpu;
 618
 619         switch(regnum)
 620         {
 621                 case M68K_REG_D0:       return cpu->dar[0];
 622                 case M68K_REG_D1:       return cpu->dar[1];
 623                 case M68K_REG_D2:       return cpu->dar[2];
 624                 case M68K_REG_D3:       return cpu->dar[3];
 625                 case M68K_REG_D4:       return cpu->dar[4];
 626                 case M68K_REG_D5:       return cpu->dar[5];
 627                 case M68K_REG_D6:       return cpu->dar[6];
 628                 case M68K_REG_D7:       return cpu->dar[7];
 629                 case M68K_REG_A0:       return cpu->dar[8];
 630                 case M68K_REG_A1:       return cpu->dar[9];
 631                 case M68K_REG_A2:       return cpu->dar[10];
 632                 case M68K_REG_A3:       return cpu->dar[11];
 633                 case M68K_REG_A4:       return cpu->dar[12];
 634                 case M68K_REG_A5:       return cpu->dar[13];
 635                 case M68K_REG_A6:       return cpu->dar[14];
 636                 case M68K_REG_A7:       return cpu->dar[15];
 637                 case M68K_REG_PC:       return MASK_OUT_ABOVE_32(cpu->pc);
 638                 case M68K_REG_SR:       return  cpu->t1_flag                                            |
 639                                                                         cpu->t0_flag                                            |
 640                                                                         (cpu->s_flag << 11)                                     |
 641                                                                         (cpu->m_flag << 11)                                     |
 642                                                                         cpu->int_mask                                           |
 643                                                                         ((cpu->x_flag & XFLAG_SET) >> 4)        |
 644                                                                         ((cpu->n_flag & NFLAG_SET) >> 4)        |
 645                                                                         ((!cpu->not_z_flag) << 2)                       |
 646                                                                         ((cpu->v_flag & VFLAG_SET) >> 6)        |
 647                                                                         ((cpu->c_flag & CFLAG_SET) >> 8);
 648                 case M68K_REG_SP:       return cpu->dar[15];
 649                 case M68K_REG_USP:      return cpu->s_flag ? cpu->sp[0] : cpu->dar[15];
 650                 case M68K_REG_ISP:      return cpu->s_flag && !cpu->m_flag ? cpu->dar[15] : cpu->sp[4];
 651                 case M68K_REG_MSP:      return cpu->s_flag && cpu->m_flag ? cpu->dar[15] : cpu->sp[6];
 652                 case M68K_REG_SFC:      return cpu->sfc;
 653                 case M68K_REG_DFC:      return cpu->dfc;
 654                 case M68K_REG_VBR:      return cpu->vbr;
 655                 case M68K_REG_CACR:     return cpu->cacr;
 656                 case M68K_REG_CAAR:     return cpu->caar;
 657                 case M68K_REG_PREF_ADDR:        return cpu->pref_addr;
 658                 case M68K_REG_PREF_DATA:        return cpu->pref_data;
 659                 case M68K_REG_PPC:      return MASK_OUT_ABOVE_32(cpu->ppc);
 660                 case M68K_REG_IR:       return cpu->ir;
 661                 case M68K_REG_CPU_TYPE:
 662                         switch(cpu->cpu_type)
 663                         {
 664                                 case CPU_TYPE_000:              return (unsigned int)M68K_CPU_TYPE_68000;
 665                                 case CPU_TYPE_010:              return (unsigned int)M68K_CPU_TYPE_68010;
 666                                 case CPU_TYPE_EC020:    return (unsigned int)M68K_CPU_TYPE_68EC020;
 667                                 case CPU_TYPE_020:              return (unsigned int)M68K_CPU_TYPE_68020;
 668                                 case CPU_TYPE_040:              return (unsigned int)M68K_CPU_TYPE_68040;
 669                         }
 670                         return M68K_CPU_TYPE_INVALID;
 671                 default:                        return 0;
 672         }
 673         return 0;
 674 }
 675
 676 void m68k_set_reg(m68k_register_t regnum, unsigned int value)
 677 {
 678         switch(regnum)
 679         {
 680                 case M68K_REG_D0:       REG_D[0] = MASK_OUT_ABOVE_32(value); return;
 681                 case M68K_REG_D1:       REG_D[1] = MASK_OUT_ABOVE_32(value); return;
 682                 case M68K_REG_D2:       REG_D[2] = MASK_OUT_ABOVE_32(value); return;
 683                 case M68K_REG_D3:       REG_D[3] = MASK_OUT_ABOVE_32(value); return;
 684                 case M68K_REG_D4:       REG_D[4] = MASK_OUT_ABOVE_32(value); return;
 685                 case M68K_REG_D5:       REG_D[5] = MASK_OUT_ABOVE_32(value); return;
 686                 case M68K_REG_D6:       REG_D[6] = MASK_OUT_ABOVE_32(value); return;
 687                 case M68K_REG_D7:       REG_D[7] = MASK_OUT_ABOVE_32(value); return;
 688                 case M68K_REG_A0:       REG_A[0] = MASK_OUT_ABOVE_32(value); return;
 689                 case M68K_REG_A1:       REG_A[1] = MASK_OUT_ABOVE_32(value); return;
 690                 case M68K_REG_A2:       REG_A[2] = MASK_OUT_ABOVE_32(value); return;
 691                 case M68K_REG_A3:       REG_A[3] = MASK_OUT_ABOVE_32(value); return;
 692                 case M68K_REG_A4:       REG_A[4] = MASK_OUT_ABOVE_32(value); return;
 693                 case M68K_REG_A5:       REG_A[5] = MASK_OUT_ABOVE_32(value); return;
 694                 case M68K_REG_A6:       REG_A[6] = MASK_OUT_ABOVE_32(value); return;
 695                 case M68K_REG_A7:       REG_A[7] = MASK_OUT_ABOVE_32(value); return;
 696                 case M68K_REG_PC:       m68ki_jump(MASK_OUT_ABOVE_32(value)); return;
 697                 case M68K_REG_SR:       m68ki_set_sr_noint_nosp(value); return;
 698                 case M68K_REG_SP:       REG_SP = MASK_OUT_ABOVE_32(value); return;
 699                 case M68K_REG_USP:      if(FLAG_S)
 700                                                                 REG_USP = MASK_OUT_ABOVE_32(value);
 701                                                         else
 702                                                                 REG_SP = MASK_OUT_ABOVE_32(value);
 703                                                         return;
 704                 case M68K_REG_ISP:      if(FLAG_S && !FLAG_M)
 705                                                                 REG_SP = MASK_OUT_ABOVE_32(value);
 706                                                         else
 707                                                                 REG_ISP = MASK_OUT_ABOVE_32(value);
 708                                                         return;
 709                 case M68K_REG_MSP:      if(FLAG_S && FLAG_M)
 710                                                                 REG_SP = MASK_OUT_ABOVE_32(value);
 711                                                         else
 712                                                                 REG_MSP = MASK_OUT_ABOVE_32(value);
 713                                                         return;
 714                 case M68K_REG_VBR:      REG_VBR = MASK_OUT_ABOVE_32(value); return;
 715                 case M68K_REG_SFC:      REG_SFC = value & 7; return;
 716                 case M68K_REG_DFC:      REG_DFC = value & 7; return;
 717                 case M68K_REG_CACR:     REG_CACR = MASK_OUT_ABOVE_32(value); return;
 718                 case M68K_REG_CAAR:     REG_CAAR = MASK_OUT_ABOVE_32(value); return;
 719                 case M68K_REG_PPC:      REG_PPC = MASK_OUT_ABOVE_32(value); return;
 720                 case M68K_REG_IR:       REG_IR = MASK_OUT_ABOVE_16(value); return;
 721                 case M68K_REG_CPU_TYPE: m68k_set_cpu_type(value); return;
 722                 default:                        return;
 723         }
 724 }
 725
 726 /* Set the callbacks */
 727 void m68k_set_int_ack_callback(int  (*callback)(int int_level))
 728 {
 729         CALLBACK_INT_ACK = callback ? callback : default_int_ack_callback;
 730 }
 731
 732 void m68k_set_bkpt_ack_callback(void  (*callback)(unsigned int data))
 733 {
 734         CALLBACK_BKPT_ACK = callback ? callback : default_bkpt_ack_callback;
 735 }
 736
 737 void m68k_set_reset_instr_callback(void  (*callback)(void))
 738 {
 739         CALLBACK_RESET_INSTR = callback ? callback : default_reset_instr_callback;
 740 }
 741
 742 void m68k_set_cmpild_instr_callback(void  (*callback)(unsigned int, int))
 743 {
 744         CALLBACK_CMPILD_INSTR = callback ? callback : default_cmpild_instr_callback;
 745 }
 746
 747 void m68k_set_rte_instr_callback(void  (*callback)(void))
 748 {
 749         CALLBACK_RTE_INSTR = callback ? callback : default_rte_instr_callback;
 750 }
 751
 752 void m68k_set_tas_instr_callback(int  (*callback)(void))
 753 {
 754         CALLBACK_TAS_INSTR = callback ? callback : default_tas_instr_callback;
 755 }
 756
 757 void m68k_set_illg_instr_callback(int  (*callback)(int))
 758 {
 759         CALLBACK_ILLG_INSTR = callback ? callback : default_illg_instr_callback;
 760 }
 761
 762 void m68k_set_pc_changed_callback(void  (*callback)(unsigned int new_pc))
 763 {
 764         CALLBACK_PC_CHANGED = callback ? callback : default_pc_changed_callback;
 765 }
 766
 767 void m68k_set_fc_callback(void  (*callback)(unsigned int new_fc))
 768 {
 769         CALLBACK_SET_FC = callback ? callback : default_set_fc_callback;
 770 }
 771
 772 void m68k_set_instr_hook_callback(void  (*callback)(unsigned int pc))
 773 {
 774         CALLBACK_INSTR_HOOK = callback ? callback : default_instr_hook_callback;
 775 }
 776
 777 /* Set the CPU type. */
 778 void m68k_set_cpu_type(unsigned int cpu_type)
 779 {
 780         switch(cpu_type)
 781         {
 782                 case M68K_CPU_TYPE_68000:
 783                         CPU_TYPE         = CPU_TYPE_000;
 784                         CPU_ADDRESS_MASK = 0x00ffffff;
 785                         CPU_SR_MASK      = 0xa71f; /* T1 -- S  -- -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
 786                         CYC_INSTRUCTION  = m68ki_cycles[0];
 787                         CYC_EXCEPTION    = m68ki_exception_cycle_table[0];
 788                         CYC_BCC_NOTAKE_B = -2;
 789                         CYC_BCC_NOTAKE_W = 2;
 790                         CYC_DBCC_F_NOEXP = -2;
 791                         CYC_DBCC_F_EXP   = 2;
 792                         CYC_SCC_R_TRUE   = 2;
 793                         CYC_MOVEM_W      = 2;
 794                         CYC_MOVEM_L      = 3;
 795                         CYC_SHIFT        = 1;
 796                         CYC_RESET        = 132;
 797                         HAS_PMMU         = 0;
 798                         return;
 799                 case M68K_CPU_TYPE_SCC68070:
 800                         m68k_set_cpu_type(M68K_CPU_TYPE_68010);
 801                         CPU_ADDRESS_MASK = 0xffffffff;
 802                         CPU_TYPE         = CPU_TYPE_SCC070;
 803                         return;
 804                 case M68K_CPU_TYPE_68010:
 805                         CPU_TYPE         = CPU_TYPE_010;
 806                         CPU_ADDRESS_MASK = 0x00ffffff;
 807                         CPU_SR_MASK      = 0xa71f; /* T1 -- S  -- -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
 808                         CYC_INSTRUCTION  = m68ki_cycles[1];
 809                         CYC_EXCEPTION    = m68ki_exception_cycle_table[1];
 810                         CYC_BCC_NOTAKE_B = -4;
 811                         CYC_BCC_NOTAKE_W = 0;
 812                         CYC_DBCC_F_NOEXP = 0;
 813                         CYC_DBCC_F_EXP   = 6;
 814                         CYC_SCC_R_TRUE   = 0;
 815                         CYC_MOVEM_W      = 2;
 816                         CYC_MOVEM_L      = 3;
 817                         CYC_SHIFT        = 1;
 818                         CYC_RESET        = 130;
 819                         HAS_PMMU         = 0;
 820                         return;
 821                 case M68K_CPU_TYPE_68EC020:
 822                         CPU_TYPE         = CPU_TYPE_EC020;
 823                         CPU_ADDRESS_MASK = 0x00ffffff;
 824                         CPU_SR_MASK      = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
 825                         CYC_INSTRUCTION  = m68ki_cycles[2];
 826                         CYC_EXCEPTION    = m68ki_exception_cycle_table[2];
 827                         CYC_BCC_NOTAKE_B = -2;
 828                         CYC_BCC_NOTAKE_W = 0;
 829                         CYC_DBCC_F_NOEXP = 0;
 830                         CYC_DBCC_F_EXP   = 4;
 831                         CYC_SCC_R_TRUE   = 0;
 832                         CYC_MOVEM_W      = 2;
 833                         CYC_MOVEM_L      = 2;
 834                         CYC_SHIFT        = 0;
 835                         CYC_RESET        = 518;
 836                         HAS_PMMU         = 0;
 837                         return;
 838                 case M68K_CPU_TYPE_68020:
 839                         CPU_TYPE         = CPU_TYPE_020;
 840                         CPU_ADDRESS_MASK = 0xffffffff;
 841                         CPU_SR_MASK      = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
 842                         CYC_INSTRUCTION  = m68ki_cycles[2];
 843                         CYC_EXCEPTION    = m68ki_exception_cycle_table[2];
 844                         CYC_BCC_NOTAKE_B = -2;
 845                         CYC_BCC_NOTAKE_W = 0;
 846                         CYC_DBCC_F_NOEXP = 0;
 847                         CYC_DBCC_F_EXP   = 4;
 848                         CYC_SCC_R_TRUE   = 0;
 849                         CYC_MOVEM_W      = 2;
 850                         CYC_MOVEM_L      = 2;
 851                         CYC_SHIFT        = 0;
 852                         CYC_RESET        = 518;
 853                         HAS_PMMU         = 0;
 854                         return;
 855                 case M68K_CPU_TYPE_68030:
 856                         CPU_TYPE         = CPU_TYPE_030;
 857                         CPU_ADDRESS_MASK = 0xffffffff;
 858                         CPU_SR_MASK      = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
 859                         CYC_INSTRUCTION  = m68ki_cycles[3];
 860                         CYC_EXCEPTION    = m68ki_exception_cycle_table[3];
 861                         CYC_BCC_NOTAKE_B = -2;
 862                         CYC_BCC_NOTAKE_W = 0;
 863                         CYC_DBCC_F_NOEXP = 0;
 864                         CYC_DBCC_F_EXP   = 4;
 865                         CYC_SCC_R_TRUE   = 0;
 866                         CYC_MOVEM_W      = 2;
 867                         CYC_MOVEM_L      = 2;
 868                         CYC_SHIFT        = 0;
 869                         CYC_RESET        = 518;
 870                         HAS_PMMU               = 1;
 871                         return;
 872                 case M68K_CPU_TYPE_68EC030:
 873                         CPU_TYPE         = CPU_TYPE_EC030;
 874                         CPU_ADDRESS_MASK = 0xffffffff;
 875                         CPU_SR_MASK          = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
 876                         CYC_INSTRUCTION  = m68ki_cycles[3];
 877                         CYC_EXCEPTION    = m68ki_exception_cycle_table[3];
 878                         CYC_BCC_NOTAKE_B = -2;
 879                         CYC_BCC_NOTAKE_W = 0;
 880                         CYC_DBCC_F_NOEXP = 0;
 881                         CYC_DBCC_F_EXP   = 4;
 882                         CYC_SCC_R_TRUE   = 0;
 883                         CYC_MOVEM_W      = 2;
 884                         CYC_MOVEM_L      = 2;
 885                         CYC_SHIFT        = 0;
 886                         CYC_RESET        = 518;
 887                         HAS_PMMU               = 0;             /* EC030 lacks the PMMU and is effectively a die-shrink 68020 */
 888                         return;
 889                 case M68K_CPU_TYPE_68040:               // TODO: these values are not correct
 890                         CPU_TYPE         = CPU_TYPE_040;
 891                         CPU_ADDRESS_MASK = 0xffffffff;
 892                         CPU_SR_MASK      = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
 893                         CYC_INSTRUCTION  = m68ki_cycles[4];
 894                         CYC_EXCEPTION    = m68ki_exception_cycle_table[4];
 895                         CYC_BCC_NOTAKE_B = -2;
 896                         CYC_BCC_NOTAKE_W = 0;
 897                         CYC_DBCC_F_NOEXP = 0;
 898                         CYC_DBCC_F_EXP   = 4;
 899                         CYC_SCC_R_TRUE   = 0;
 900                         CYC_MOVEM_W      = 2;
 901                         CYC_MOVEM_L      = 2;
 902                         CYC_SHIFT        = 0;
 903                         CYC_RESET        = 518;
 904                         HAS_PMMU         = 1;
 905                         return;
 906                 case M68K_CPU_TYPE_68EC040: // Just a 68040 without pmmu apparently...
 907                         CPU_TYPE         = CPU_TYPE_EC040;
 908                         CPU_ADDRESS_MASK = 0xffffffff;
 909                         CPU_SR_MASK      = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
 910                         CYC_INSTRUCTION  = m68ki_cycles[4];
 911                         CYC_EXCEPTION    = m68ki_exception_cycle_table[4];
 912                         CYC_BCC_NOTAKE_B = -2;
 913                         CYC_BCC_NOTAKE_W = 0;
 914                         CYC_DBCC_F_NOEXP = 0;
 915                         CYC_DBCC_F_EXP   = 4;
 916                         CYC_SCC_R_TRUE   = 0;
 917                         CYC_MOVEM_W      = 2;
 918                         CYC_MOVEM_L      = 2;
 919                         CYC_SHIFT        = 0;
 920                         CYC_RESET        = 518;
 921                         HAS_PMMU         = 0;
 922                         return;
 923                 case M68K_CPU_TYPE_68LC040:
 924                         CPU_TYPE         = CPU_TYPE_LC040;
 925                         m68ki_cpu.sr_mask          = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
 926                         m68ki_cpu.cyc_instruction  = m68ki_cycles[4];
 927                         m68ki_cpu.cyc_exception    = m68ki_exception_cycle_table[4];
 928                         m68ki_cpu.cyc_bcc_notake_b = -2;
 929                         m68ki_cpu.cyc_bcc_notake_w = 0;
 930                         m68ki_cpu.cyc_dbcc_f_noexp = 0;
 931                         m68ki_cpu.cyc_dbcc_f_exp   = 4;
 932                         m68ki_cpu.cyc_scc_r_true   = 0;
 933                         m68ki_cpu.cyc_movem_w      = 2;
 934                         m68ki_cpu.cyc_movem_l      = 2;
 935                         m68ki_cpu.cyc_shift        = 0;
 936                         m68ki_cpu.cyc_reset        = 518;
 937                         HAS_PMMU               = 1;
 938                         return;
 939         }
 940 }
 941
 942 /* Execute some instructions until we use up num_cycles clock cycles */
 943 /* ASG: removed per-instruction interrupt checks */
 944 int m68k_execute(int num_cycles)
 945 {
 946         /* eat up any reset cycles */
 947         if (RESET_CYCLES) {
 948             int rc = RESET_CYCLES;
 949             RESET_CYCLES = 0;
 950             num_cycles -= rc;
 951             if (num_cycles <= 0)
 952                 return rc;
 953         }
 954
 955         /* Set our pool of clock cycles available */
 956         SET_CYCLES(num_cycles);
 957         m68ki_initial_cycles = num_cycles;
 958
 959         /* See if interrupts came in */
 960         m68ki_check_interrupts();
 961
 962         /* Make sure we're not stopped */
 963         if(!CPU_STOPPED)
 964         {
 965                 /* Return point if we had an address error */
 966                 m68ki_set_address_error_trap(); /* auto-disable (see m68kcpu.h) */
 967
 968                 m68ki_check_bus_error_trap();
 969
 970                 /* Main loop.  Keep going until we run out of clock cycles */
 971                 do
 972                 {
 973                         int i;
 974                         /* Set tracing accodring to T1. (T0 is done inside instruction) */
 975                         m68ki_trace_t1(); /* auto-disable (see m68kcpu.h) */
 976
 977                         /* Set the address space for reads */
 978                         m68ki_use_data_space(); /* auto-disable (see m68kcpu.h) */
 979
 980                         /* Call external hook to peek at CPU */
 981                         m68ki_instr_hook(REG_PC); /* auto-disable (see m68kcpu.h) */
 982
 983                         /* Record previous program counter */
 984                         REG_PPC = REG_PC;
 985
 986                         /* Record previous D/A register state (in case of bus error) */
 987                         for (i = 15; i >= 0; i--){
 988                                 REG_DA_SAVE[i] = REG_DA[i];
 989                         }
 990
 991                         /* Read an instruction and call its handler */
 992                         REG_IR = m68ki_read_imm_16();
 993                         m68ki_instruction_jump_table[REG_IR]();
 994                         USE_CYCLES(CYC_INSTRUCTION[REG_IR]);
 995
 996                         /* Trace m68k_exception, if necessary */
 997                         m68ki_exception_if_trace(); /* auto-disable (see m68kcpu.h) */
 998                 } while(GET_CYCLES() > 0);
 999
1000                 /* set previous PC to current PC for the next entry into the loop */
1001                 REG_PPC = REG_PC;
1002         }
1003         else
1004                 SET_CYCLES(0);
1005
1006         /* return how many clocks we used */
1007         return m68ki_initial_cycles - GET_CYCLES();
1008 }
1009
1010
1011 int m68k_cycles_run(void)
1012 {
1013         return m68ki_initial_cycles - GET_CYCLES();
1014 }
1015
1016 int m68k_cycles_remaining(void)
1017 {
1018         return GET_CYCLES();
1019 }
1020
1021 /* Change the timeslice */
1022 void m68k_modify_timeslice(int cycles)
1023 {
1024         m68ki_initial_cycles += cycles;
1025         ADD_CYCLES(cycles);
1026 }
1027
1028
1029 void m68k_end_timeslice(void)
1030 {
1031         m68ki_initial_cycles = GET_CYCLES();
1032         SET_CYCLES(0);
1033 }
1034
1035
1036 /* ASG: rewrote so that the int_level is a mask of the IPL0/IPL1/IPL2 bits */
1037 /* KS: Modified so that IPL* bits match with mask positions in the SR
1038  *     and cleaned out remenants of the interrupt controller.
1039  */
1040 void m68k_set_irq(unsigned int int_level)
1041 {
1042         uint old_level = CPU_INT_LEVEL;
1043         CPU_INT_LEVEL = int_level << 8;
1044
1045         /* A transition from < 7 to 7 always interrupts (NMI) */
1046         /* Note: Level 7 can also level trigger like a normal IRQ */
1047         if(old_level != 0x0700 && CPU_INT_LEVEL == 0x0700)
1048                 m68ki_cpu.nmi_pending = TRUE;
1049 }
1050
1051 void m68k_set_virq(unsigned int level, unsigned int active)
1052 {
1053         uint state = m68ki_cpu.virq_state;
1054         uint blevel;
1055
1056         if(active)
1057                 state |= 1 << level;
1058         else
1059                 state &= ~(1 << level);
1060         m68ki_cpu.virq_state = state;
1061
1062         for(blevel = 7; blevel > 0; blevel--)
1063                 if(state & (1 << blevel))
1064                         break;
1065         m68k_set_irq(blevel);
1066 }
1067
1068 unsigned int m68k_get_virq(unsigned int level)
1069 {
1070         return (m68ki_cpu.virq_state & (1 << level)) ? 1 : 0;
1071 }
1072
1073 void m68k_init(void)
1074 {
1075         static uint emulation_initialized = 0;
1076
1077         /* The first call to this function initializes the opcode handler jump table */
1078         if(!emulation_initialized)
1079                 {
1080                 m68ki_build_opcode_table();
1081                 emulation_initialized = 1;
1082         }
1083
1084         m68k_set_int_ack_callback(NULL);
1085         m68k_set_bkpt_ack_callback(NULL);
1086         m68k_set_reset_instr_callback(NULL);
1087         m68k_set_cmpild_instr_callback(NULL);
1088         m68k_set_rte_instr_callback(NULL);
1089         m68k_set_tas_instr_callback(NULL);
1090         m68k_set_illg_instr_callback(NULL);
1091         m68k_set_pc_changed_callback(NULL);
1092         m68k_set_fc_callback(NULL);
1093         m68k_set_instr_hook_callback(NULL);
1094 }
1095
1096 /* Trigger a Bus Error exception */
1097 void m68k_pulse_bus_error(void)
1098 {
1099         m68ki_exception_bus_error();
1100 }
1101
1102 /* Pulse the RESET line on the CPU */
1103 void m68k_pulse_reset(void)
1104 {
1105         /* Disable the PMMU on reset */
1106         m68ki_cpu.pmmu_enabled = 0;
1107
1108         /* Clear all stop levels and eat up all remaining cycles */
1109         CPU_STOPPED = 0;
1110         SET_CYCLES(0);
1111
1112         CPU_RUN_MODE = RUN_MODE_BERR_AERR_RESET;
1113         CPU_INSTR_MODE = INSTRUCTION_YES;
1114
1115         /* Turn off tracing */
1116         FLAG_T1 = FLAG_T0 = 0;
1117         m68ki_clear_trace();
1118         /* Interrupt mask to level 7 */
1119         FLAG_INT_MASK = 0x0700;
1120         CPU_INT_LEVEL = 0;
1121         m68ki_cpu.virq_state = 0;
1122         /* Reset VBR */
1123         REG_VBR = 0;
1124         /* Go to supervisor mode */
1125         m68ki_set_sm_flag(SFLAG_SET | MFLAG_CLEAR);
1126
1127         /* Invalidate the prefetch queue */
1128 #if M68K_EMULATE_PREFETCH
1129         /* Set to arbitrary number since our first fetch is from 0 */
1130         CPU_PREF_ADDR = 0x1000;
1131 #endif /* M68K_EMULATE_PREFETCH */
1132
1133         /* Read the initial stack pointer and program counter */
1134         m68ki_jump(0);
1135         REG_SP = m68ki_read_imm_32();
1136         REG_PC = m68ki_read_imm_32();
1137         m68ki_jump(REG_PC);
1138
1139         CPU_RUN_MODE = RUN_MODE_NORMAL;
1140
1141         RESET_CYCLES = CYC_EXCEPTION[EXCEPTION_RESET];
1142 }
1143
1144 /* Pulse the HALT line on the CPU */
1145 void m68k_pulse_halt(void)
1146 {
1147         CPU_STOPPED |= STOP_LEVEL_HALT;
1148 }
1149
1150 /* Get and set the current CPU context */
1151 /* This is to allow for multiple CPUs */
1152 unsigned int m68k_context_size()
1153 {
1154         return sizeof(m68ki_cpu_core);
1155 }
1156
1157 unsigned int m68k_get_context(void* dst)
1158 {
1159         if(dst) *(m68ki_cpu_core*)dst = m68ki_cpu;
1160         return sizeof(m68ki_cpu_core);
1161 }
1162
1163 void m68k_set_context(void* src)
1164 {
1165         if(src) m68ki_cpu = *(m68ki_cpu_core*)src;
1166 }
1167
1168 /* ======================================================================== */
1169 /* ============================== MAME STUFF ============================== */
1170 /* ======================================================================== */
1171
1172 #if M68K_COMPILE_FOR_MAME == OPT_ON
1173
1174 static struct {
1175         UINT16 sr;
1176         UINT8 stopped;
1177         UINT8 halted;
1178 } m68k_substate;
1179
1180 static void m68k_prepare_substate(void)
1181 {
1182         m68k_substate.sr = m68ki_get_sr();
1183         m68k_substate.stopped = (CPU_STOPPED & STOP_LEVEL_STOP) != 0;
1184         m68k_substate.halted  = (CPU_STOPPED & STOP_LEVEL_HALT) != 0;
1185 }
1186
1187 static void m68k_post_load(void)
1188 {
1189         m68ki_set_sr_noint_nosp(m68k_substate.sr);
1190         CPU_STOPPED = m68k_substate.stopped ? STOP_LEVEL_STOP : 0
1191                         | m68k_substate.halted  ? STOP_LEVEL_HALT : 0;
1192         m68ki_jump(REG_PC);
1193 }
1194
1195 void m68k_state_register(const char *type, int index)
1196 {
1197         /* Note, D covers A because the dar array is common, REG_A=REG_D+8 */
1198         state_save_register_item_array(type, index, REG_D);
1199         state_save_register_item(type, index, REG_PPC);
1200         state_save_register_item(type, index, REG_PC);
1201         state_save_register_item(type, index, REG_USP);
1202         state_save_register_item(type, index, REG_ISP);
1203         state_save_register_item(type, index, REG_MSP);
1204         state_save_register_item(type, index, REG_VBR);
1205         state_save_register_item(type, index, REG_SFC);
1206         state_save_register_item(type, index, REG_DFC);
1207         state_save_register_item(type, index, REG_CACR);
1208         state_save_register_item(type, index, REG_CAAR);
1209         state_save_register_item(type, index, m68k_substate.sr);
1210         state_save_register_item(type, index, CPU_INT_LEVEL);
1211         state_save_register_item(type, index, m68k_substate.stopped);
1212         state_save_register_item(type, index, m68k_substate.halted);
1213         state_save_register_item(type, index, CPU_PREF_ADDR);
1214         state_save_register_item(type, index, CPU_PREF_DATA);
1215         state_save_register_func_presave(m68k_prepare_substate);
1216         state_save_register_func_postload(m68k_post_load);
1217 }
1218
1219 #endif /* M68K_COMPILE_FOR_MAME */
1220
1221 /* ======================================================================== */
1222 /* ============================== END OF FILE ============================= */
1223 /* ======================================================================== */