| 1 | /* sim-main.h -- Simulator for Motorola 68HC11 & 68HC12 |
| 2 | Copyright (C) 1999-2016 Free Software Foundation, Inc. |
| 3 | Written by Stephane Carrez (stcarrez@nerim.fr) |
| 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 of the License, or |
| 10 | (at your option) 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 | #ifndef _SIM_MAIN_H |
| 21 | #define _SIM_MAIN_H |
| 22 | |
| 23 | #include "sim-basics.h" |
| 24 | #include "sim-signal.h" |
| 25 | #include "sim-base.h" |
| 26 | |
| 27 | #include "bfd.h" |
| 28 | |
| 29 | #include "opcode/m68hc11.h" |
| 30 | |
| 31 | #include "gdb/callback.h" |
| 32 | #include "gdb/remote-sim.h" |
| 33 | #include "opcode/m68hc11.h" |
| 34 | #include "sim-types.h" |
| 35 | |
| 36 | typedef unsigned8 uint8; |
| 37 | typedef unsigned16 uint16; |
| 38 | typedef signed16 int16; |
| 39 | typedef unsigned32 uint32; |
| 40 | typedef signed32 int32; |
| 41 | typedef unsigned64 uint64; |
| 42 | typedef signed64 int64; |
| 43 | |
| 44 | struct _sim_cpu; |
| 45 | |
| 46 | #include "interrupts.h" |
| 47 | #include <setjmp.h> |
| 48 | |
| 49 | /* Specifies the level of mapping for the IO, EEprom, nvram and external |
| 50 | RAM. IO registers are mapped over everything and the external RAM |
| 51 | is last (ie, it can be hidden by everything above it in the list). */ |
| 52 | enum m68hc11_map_level |
| 53 | { |
| 54 | M6811_IO_LEVEL, |
| 55 | M6811_EEPROM_LEVEL, |
| 56 | M6811_NVRAM_LEVEL, |
| 57 | M6811_RAM_LEVEL |
| 58 | }; |
| 59 | |
| 60 | enum cpu_type |
| 61 | { |
| 62 | CPU_M6811, |
| 63 | CPU_M6812 |
| 64 | }; |
| 65 | |
| 66 | #define X_REGNUM 0 |
| 67 | #define D_REGNUM 1 |
| 68 | #define Y_REGNUM 2 |
| 69 | #define SP_REGNUM 3 |
| 70 | #define PC_REGNUM 4 |
| 71 | #define A_REGNUM 5 |
| 72 | #define B_REGNUM 6 |
| 73 | #define PSW_REGNUM 7 |
| 74 | #define PAGE_REGNUM 8 |
| 75 | #define Z_REGNUM 9 |
| 76 | |
| 77 | typedef struct m6811_regs { |
| 78 | unsigned short d; |
| 79 | unsigned short ix; |
| 80 | unsigned short iy; |
| 81 | unsigned short sp; |
| 82 | unsigned short pc; |
| 83 | unsigned char ccr; |
| 84 | unsigned short page; |
| 85 | } m6811_regs; |
| 86 | |
| 87 | |
| 88 | /* Description of 68HC11 IO registers. Such description is only provided |
| 89 | for the info command to display the current setting of IO registers |
| 90 | from GDB. */ |
| 91 | struct io_reg_desc |
| 92 | { |
| 93 | int mask; |
| 94 | const char *short_name; |
| 95 | const char *long_name; |
| 96 | }; |
| 97 | typedef struct io_reg_desc io_reg_desc; |
| 98 | |
| 99 | extern void print_io_reg_desc (SIM_DESC sd, io_reg_desc *desc, int val, |
| 100 | int mode); |
| 101 | extern void print_io_byte (SIM_DESC sd, const char *name, |
| 102 | io_reg_desc *desc, uint8 val, uint16 addr); |
| 103 | extern void print_io_word (SIM_DESC sd, const char *name, |
| 104 | io_reg_desc *desc, uint16 val, uint16 addr); |
| 105 | |
| 106 | |
| 107 | /* List of special 68HC11&68HC12 instructions that are not handled by the |
| 108 | 'gencode.c' generator. These complex instructions are implemented |
| 109 | by 'cpu_special'. */ |
| 110 | enum M6811_Special |
| 111 | { |
| 112 | /* 68HC11 instructions. */ |
| 113 | M6811_DAA, |
| 114 | M6811_EMUL_SYSCALL, |
| 115 | M6811_ILLEGAL, |
| 116 | M6811_RTI, |
| 117 | M6811_STOP, |
| 118 | M6811_SWI, |
| 119 | M6811_TEST, |
| 120 | M6811_WAI, |
| 121 | |
| 122 | /* 68HC12 instructions. */ |
| 123 | M6812_BGND, |
| 124 | M6812_CALL, |
| 125 | M6812_CALL_INDIRECT, |
| 126 | M6812_IDIVS, |
| 127 | M6812_EDIV, |
| 128 | M6812_EDIVS, |
| 129 | M6812_EMACS, |
| 130 | M6812_EMUL, |
| 131 | M6812_EMULS, |
| 132 | M6812_ETBL, |
| 133 | M6812_MEM, |
| 134 | M6812_REV, |
| 135 | M6812_REVW, |
| 136 | M6812_RTC, |
| 137 | M6812_RTI, |
| 138 | M6812_WAV |
| 139 | }; |
| 140 | |
| 141 | #define M6811_MAX_PORTS (0x03f+1) |
| 142 | #define M6812_MAX_PORTS (0x3ff+1) |
| 143 | #define MAX_PORTS (M6812_MAX_PORTS) |
| 144 | |
| 145 | struct _sim_cpu; |
| 146 | |
| 147 | typedef void (* cpu_interp) (struct _sim_cpu*); |
| 148 | |
| 149 | struct _sim_cpu { |
| 150 | /* CPU registers. */ |
| 151 | struct m6811_regs cpu_regs; |
| 152 | |
| 153 | /* CPU interrupts. */ |
| 154 | struct interrupts cpu_interrupts; |
| 155 | |
| 156 | /* Pointer to the interpretor routine. */ |
| 157 | cpu_interp cpu_interpretor; |
| 158 | |
| 159 | /* Pointer to the architecture currently configured in the simulator. */ |
| 160 | const struct bfd_arch_info *cpu_configured_arch; |
| 161 | |
| 162 | /* CPU absolute cycle time. The cycle time is updated after |
| 163 | each instruction, by the number of cycles taken by the instruction. |
| 164 | It is cleared only when reset occurs. */ |
| 165 | signed64 cpu_absolute_cycle; |
| 166 | |
| 167 | /* Number of cycles to increment after the current instruction. |
| 168 | This is also the number of ticks for the generic event scheduler. */ |
| 169 | uint8 cpu_current_cycle; |
| 170 | int cpu_emul_syscall; |
| 171 | int cpu_is_initialized; |
| 172 | int cpu_running; |
| 173 | int cpu_check_memory; |
| 174 | int cpu_stop_on_interrupt; |
| 175 | |
| 176 | /* When this is set, start execution of program at address specified |
| 177 | in the ELF header. This is used for testing some programs that do not |
| 178 | have an interrupt table linked with them. Programs created during the |
| 179 | GCC validation are like this. A normal 68HC11 does not behave like |
| 180 | this (unless there is some OS or downloadable feature). */ |
| 181 | int cpu_use_elf_start; |
| 182 | |
| 183 | /* The starting address specified in ELF header. */ |
| 184 | int cpu_elf_start; |
| 185 | |
| 186 | uint16 cpu_insn_pc; |
| 187 | |
| 188 | /* CPU frequency. This is the quartz frequency. It is divided by 4 to |
| 189 | get the cycle time. This is used for the timer rate and for the baud |
| 190 | rate generation. */ |
| 191 | unsigned long cpu_frequency; |
| 192 | |
| 193 | /* The mode in which the CPU is configured (MODA and MODB pins). */ |
| 194 | unsigned int cpu_mode; |
| 195 | const char* cpu_start_mode; |
| 196 | |
| 197 | /* The cpu being configured. */ |
| 198 | enum cpu_type cpu_type; |
| 199 | |
| 200 | /* Initial value of the CONFIG register. */ |
| 201 | uint8 cpu_config; |
| 202 | uint8 cpu_use_local_config; |
| 203 | |
| 204 | uint8 ios[MAX_PORTS]; |
| 205 | |
| 206 | /* Memory bank parameters which describe how the memory bank window |
| 207 | is mapped in memory and how to convert it in virtual address. */ |
| 208 | uint16 bank_start; |
| 209 | uint16 bank_end; |
| 210 | address_word bank_virtual; |
| 211 | unsigned bank_shift; |
| 212 | |
| 213 | |
| 214 | struct hw *hw_cpu; |
| 215 | |
| 216 | /* ... base type ... */ |
| 217 | sim_cpu_base base; |
| 218 | }; |
| 219 | |
| 220 | /* Returns the cpu absolute cycle time (A virtual counter incremented |
| 221 | at each 68HC11 E clock). */ |
| 222 | #define cpu_current_cycle(PROC) ((PROC)->cpu_absolute_cycle) |
| 223 | #define cpu_add_cycles(PROC,T) ((PROC)->cpu_current_cycle += (signed64) (T)) |
| 224 | #define cpu_is_running(PROC) ((PROC)->cpu_running) |
| 225 | |
| 226 | /* Get the IO/RAM base addresses depending on the M6811_INIT register. */ |
| 227 | #define cpu_get_io_base(PROC) \ |
| 228 | (((uint16)(((PROC)->ios[M6811_INIT]) & 0x0F))<<12) |
| 229 | #define cpu_get_reg_base(PROC) \ |
| 230 | (((uint16)(((PROC)->ios[M6811_INIT]) & 0xF0))<<8) |
| 231 | |
| 232 | /* Returns the different CPU registers. */ |
| 233 | #define cpu_get_ccr(PROC) ((PROC)->cpu_regs.ccr) |
| 234 | #define cpu_get_pc(PROC) ((PROC)->cpu_regs.pc) |
| 235 | #define cpu_get_d(PROC) ((PROC)->cpu_regs.d) |
| 236 | #define cpu_get_x(PROC) ((PROC)->cpu_regs.ix) |
| 237 | #define cpu_get_y(PROC) ((PROC)->cpu_regs.iy) |
| 238 | #define cpu_get_sp(PROC) ((PROC)->cpu_regs.sp) |
| 239 | #define cpu_get_a(PROC) ((PROC->cpu_regs.d >> 8) & 0x0FF) |
| 240 | #define cpu_get_b(PROC) ((PROC->cpu_regs.d) & 0x0FF) |
| 241 | #define cpu_get_page(PROC) ((PROC)->cpu_regs.page) |
| 242 | |
| 243 | /* 68HC12 specific and Motorola internal registers. */ |
| 244 | #define cpu_get_tmp3(PROC) (0) |
| 245 | #define cpu_get_tmp2(PROC) (0) |
| 246 | |
| 247 | #define cpu_set_d(PROC,VAL) (((PROC)->cpu_regs.d) = (VAL)) |
| 248 | #define cpu_set_x(PROC,VAL) (((PROC)->cpu_regs.ix) = (VAL)) |
| 249 | #define cpu_set_y(PROC,VAL) (((PROC)->cpu_regs.iy) = (VAL)) |
| 250 | #define cpu_set_page(PROC,VAL) (((PROC)->cpu_regs.page) = (VAL)) |
| 251 | |
| 252 | /* 68HC12 specific and Motorola internal registers. */ |
| 253 | #define cpu_set_tmp3(PROC,VAL) (0) |
| 254 | #define cpu_set_tmp2(PROC,VAL) (void) (0) |
| 255 | |
| 256 | #if 0 |
| 257 | /* This is a function in m68hc11_sim.c to keep track of the frame. */ |
| 258 | #define cpu_set_sp(PROC,VAL) (((PROC)->cpu_regs.sp) = (VAL)) |
| 259 | #endif |
| 260 | |
| 261 | #define cpu_set_pc(PROC,VAL) (((PROC)->cpu_regs.pc) = (VAL)) |
| 262 | |
| 263 | #define cpu_set_a(PROC,VAL) \ |
| 264 | cpu_set_d(PROC,((VAL) << 8) | cpu_get_b(PROC)) |
| 265 | #define cpu_set_b(PROC,VAL) \ |
| 266 | cpu_set_d(PROC,((cpu_get_a(PROC)) << 8)|(VAL & 0x0FF)) |
| 267 | |
| 268 | #define cpu_set_ccr(PROC,VAL) ((PROC)->cpu_regs.ccr = (VAL)) |
| 269 | #define cpu_get_ccr_H(PROC) ((cpu_get_ccr(PROC) & M6811_H_BIT) ? 1: 0) |
| 270 | #define cpu_get_ccr_X(PROC) ((cpu_get_ccr(PROC) & M6811_X_BIT) ? 1: 0) |
| 271 | #define cpu_get_ccr_S(PROC) ((cpu_get_ccr(PROC) & M6811_S_BIT) ? 1: 0) |
| 272 | #define cpu_get_ccr_N(PROC) ((cpu_get_ccr(PROC) & M6811_N_BIT) ? 1: 0) |
| 273 | #define cpu_get_ccr_V(PROC) ((cpu_get_ccr(PROC) & M6811_V_BIT) ? 1: 0) |
| 274 | #define cpu_get_ccr_C(PROC) ((cpu_get_ccr(PROC) & M6811_C_BIT) ? 1: 0) |
| 275 | #define cpu_get_ccr_Z(PROC) ((cpu_get_ccr(PROC) & M6811_Z_BIT) ? 1: 0) |
| 276 | #define cpu_get_ccr_I(PROC) ((cpu_get_ccr(PROC) & M6811_I_BIT) ? 1: 0) |
| 277 | |
| 278 | #define cpu_set_ccr_flag(S,B,V) \ |
| 279 | cpu_set_ccr(S,(cpu_get_ccr(S) & ~(B)) | ((V) ? B : 0)) |
| 280 | |
| 281 | #define cpu_set_ccr_H(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_H_BIT, VAL) |
| 282 | #define cpu_set_ccr_X(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_X_BIT, VAL) |
| 283 | #define cpu_set_ccr_S(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_S_BIT, VAL) |
| 284 | #define cpu_set_ccr_N(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_N_BIT, VAL) |
| 285 | #define cpu_set_ccr_V(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_V_BIT, VAL) |
| 286 | #define cpu_set_ccr_C(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_C_BIT, VAL) |
| 287 | #define cpu_set_ccr_Z(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_Z_BIT, VAL) |
| 288 | #define cpu_set_ccr_I(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_I_BIT, VAL) |
| 289 | |
| 290 | #undef inline |
| 291 | #define inline static __inline__ |
| 292 | |
| 293 | extern void cpu_memory_exception (struct _sim_cpu *proc, |
| 294 | SIM_SIGNAL excep, |
| 295 | uint16 addr, |
| 296 | const char *message); |
| 297 | |
| 298 | inline address_word |
| 299 | phys_to_virt (sim_cpu *cpu, address_word addr) |
| 300 | { |
| 301 | if (addr >= cpu->bank_start && addr < cpu->bank_end) |
| 302 | return ((address_word) (addr - cpu->bank_start) |
| 303 | + (((address_word) cpu->cpu_regs.page) << cpu->bank_shift) |
| 304 | + cpu->bank_virtual); |
| 305 | else |
| 306 | return (address_word) (addr); |
| 307 | } |
| 308 | |
| 309 | inline uint8 |
| 310 | memory_read8 (sim_cpu *cpu, uint16 addr) |
| 311 | { |
| 312 | uint8 val; |
| 313 | |
| 314 | if (sim_core_read_buffer (CPU_STATE (cpu), cpu, 0, &val, addr, 1) != 1) |
| 315 | { |
| 316 | cpu_memory_exception (cpu, SIM_SIGSEGV, addr, |
| 317 | "Read error"); |
| 318 | } |
| 319 | return val; |
| 320 | } |
| 321 | |
| 322 | inline void |
| 323 | memory_write8 (sim_cpu *cpu, uint16 addr, uint8 val) |
| 324 | { |
| 325 | if (sim_core_write_buffer (CPU_STATE (cpu), cpu, 0, &val, addr, 1) != 1) |
| 326 | { |
| 327 | cpu_memory_exception (cpu, SIM_SIGSEGV, addr, |
| 328 | "Write error"); |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | inline uint16 |
| 333 | memory_read16 (sim_cpu *cpu, uint16 addr) |
| 334 | { |
| 335 | uint8 b[2]; |
| 336 | |
| 337 | if (sim_core_read_buffer (CPU_STATE (cpu), cpu, 0, b, addr, 2) != 2) |
| 338 | { |
| 339 | cpu_memory_exception (cpu, SIM_SIGSEGV, addr, |
| 340 | "Read error"); |
| 341 | } |
| 342 | return (((uint16) (b[0])) << 8) | ((uint16) b[1]); |
| 343 | } |
| 344 | |
| 345 | inline void |
| 346 | memory_write16 (sim_cpu *cpu, uint16 addr, uint16 val) |
| 347 | { |
| 348 | uint8 b[2]; |
| 349 | |
| 350 | b[0] = val >> 8; |
| 351 | b[1] = val; |
| 352 | if (sim_core_write_buffer (CPU_STATE (cpu), cpu, 0, b, addr, 2) != 2) |
| 353 | { |
| 354 | cpu_memory_exception (cpu, SIM_SIGSEGV, addr, |
| 355 | "Write error"); |
| 356 | } |
| 357 | } |
| 358 | extern void |
| 359 | cpu_ccr_update_tst8 (sim_cpu *proc, uint8 val); |
| 360 | |
| 361 | inline void |
| 362 | cpu_ccr_update_tst16 (sim_cpu *proc, uint16 val) |
| 363 | { |
| 364 | cpu_set_ccr_V (proc, 0); |
| 365 | cpu_set_ccr_N (proc, val & 0x8000 ? 1 : 0); |
| 366 | cpu_set_ccr_Z (proc, val == 0 ? 1 : 0); |
| 367 | } |
| 368 | |
| 369 | inline void |
| 370 | cpu_ccr_update_shift8 (sim_cpu *proc, uint8 val) |
| 371 | { |
| 372 | cpu_set_ccr_N (proc, val & 0x80 ? 1 : 0); |
| 373 | cpu_set_ccr_Z (proc, val == 0 ? 1 : 0); |
| 374 | cpu_set_ccr_V (proc, cpu_get_ccr_N (proc) ^ cpu_get_ccr_C (proc)); |
| 375 | } |
| 376 | |
| 377 | inline void |
| 378 | cpu_ccr_update_shift16 (sim_cpu *proc, uint16 val) |
| 379 | { |
| 380 | cpu_set_ccr_N (proc, val & 0x8000 ? 1 : 0); |
| 381 | cpu_set_ccr_Z (proc, val == 0 ? 1 : 0); |
| 382 | cpu_set_ccr_V (proc, cpu_get_ccr_N (proc) ^ cpu_get_ccr_C (proc)); |
| 383 | } |
| 384 | |
| 385 | inline void |
| 386 | cpu_ccr_update_add8 (sim_cpu *proc, uint8 r, uint8 a, uint8 b) |
| 387 | { |
| 388 | cpu_set_ccr_C (proc, ((a & b) | (b & ~r) | (a & ~r)) & 0x80 ? 1 : 0); |
| 389 | cpu_set_ccr_V (proc, ((a & b & ~r) | (~a & ~b & r)) & 0x80 ? 1 : 0); |
| 390 | cpu_set_ccr_Z (proc, r == 0); |
| 391 | cpu_set_ccr_N (proc, r & 0x80 ? 1 : 0); |
| 392 | } |
| 393 | |
| 394 | |
| 395 | inline void |
| 396 | cpu_ccr_update_sub8 (sim_cpu *proc, uint8 r, uint8 a, uint8 b) |
| 397 | { |
| 398 | cpu_set_ccr_C (proc, ((~a & b) | (b & r) | (~a & r)) & 0x80 ? 1 : 0); |
| 399 | cpu_set_ccr_V (proc, ((a & ~b & ~r) | (~a & b & r)) & 0x80 ? 1 : 0); |
| 400 | cpu_set_ccr_Z (proc, r == 0); |
| 401 | cpu_set_ccr_N (proc, r & 0x80 ? 1 : 0); |
| 402 | } |
| 403 | |
| 404 | inline void |
| 405 | cpu_ccr_update_add16 (sim_cpu *proc, uint16 r, uint16 a, uint16 b) |
| 406 | { |
| 407 | cpu_set_ccr_C (proc, ((a & b) | (b & ~r) | (a & ~r)) & 0x8000 ? 1 : 0); |
| 408 | cpu_set_ccr_V (proc, ((a & b & ~r) | (~a & ~b & r)) & 0x8000 ? 1 : 0); |
| 409 | cpu_set_ccr_Z (proc, r == 0); |
| 410 | cpu_set_ccr_N (proc, r & 0x8000 ? 1 : 0); |
| 411 | } |
| 412 | |
| 413 | inline void |
| 414 | cpu_ccr_update_sub16 (sim_cpu *proc, uint16 r, uint16 a, uint16 b) |
| 415 | { |
| 416 | cpu_set_ccr_C (proc, ((~a & b) | (b & r) | (~a & r)) & 0x8000 ? 1 : 0); |
| 417 | cpu_set_ccr_V (proc, ((a & ~b & ~r) | (~a & b & r)) & 0x8000 ? 1 : 0); |
| 418 | cpu_set_ccr_Z (proc, r == 0); |
| 419 | cpu_set_ccr_N (proc, r & 0x8000 ? 1 : 0); |
| 420 | } |
| 421 | |
| 422 | /* Push and pop instructions for 68HC11 (next-available stack mode). */ |
| 423 | inline void |
| 424 | cpu_m68hc11_push_uint8 (sim_cpu *proc, uint8 val) |
| 425 | { |
| 426 | uint16 addr = proc->cpu_regs.sp; |
| 427 | |
| 428 | memory_write8 (proc, addr, val); |
| 429 | proc->cpu_regs.sp = addr - 1; |
| 430 | } |
| 431 | |
| 432 | inline void |
| 433 | cpu_m68hc11_push_uint16 (sim_cpu *proc, uint16 val) |
| 434 | { |
| 435 | uint16 addr = proc->cpu_regs.sp - 1; |
| 436 | |
| 437 | memory_write16 (proc, addr, val); |
| 438 | proc->cpu_regs.sp = addr - 1; |
| 439 | } |
| 440 | |
| 441 | inline uint8 |
| 442 | cpu_m68hc11_pop_uint8 (sim_cpu *proc) |
| 443 | { |
| 444 | uint16 addr = proc->cpu_regs.sp; |
| 445 | uint8 val; |
| 446 | |
| 447 | val = memory_read8 (proc, addr + 1); |
| 448 | proc->cpu_regs.sp = addr + 1; |
| 449 | return val; |
| 450 | } |
| 451 | |
| 452 | inline uint16 |
| 453 | cpu_m68hc11_pop_uint16 (sim_cpu *proc) |
| 454 | { |
| 455 | uint16 addr = proc->cpu_regs.sp; |
| 456 | uint16 val; |
| 457 | |
| 458 | val = memory_read16 (proc, addr + 1); |
| 459 | proc->cpu_regs.sp = addr + 2; |
| 460 | return val; |
| 461 | } |
| 462 | |
| 463 | /* Push and pop instructions for 68HC12 (last-used stack mode). */ |
| 464 | inline void |
| 465 | cpu_m68hc12_push_uint8 (sim_cpu *proc, uint8 val) |
| 466 | { |
| 467 | uint16 addr = proc->cpu_regs.sp; |
| 468 | |
| 469 | addr --; |
| 470 | memory_write8 (proc, addr, val); |
| 471 | proc->cpu_regs.sp = addr; |
| 472 | } |
| 473 | |
| 474 | inline void |
| 475 | cpu_m68hc12_push_uint16 (sim_cpu *proc, uint16 val) |
| 476 | { |
| 477 | uint16 addr = proc->cpu_regs.sp; |
| 478 | |
| 479 | addr -= 2; |
| 480 | memory_write16 (proc, addr, val); |
| 481 | proc->cpu_regs.sp = addr; |
| 482 | } |
| 483 | |
| 484 | inline uint8 |
| 485 | cpu_m68hc12_pop_uint8 (sim_cpu *proc) |
| 486 | { |
| 487 | uint16 addr = proc->cpu_regs.sp; |
| 488 | uint8 val; |
| 489 | |
| 490 | val = memory_read8 (proc, addr); |
| 491 | proc->cpu_regs.sp = addr + 1; |
| 492 | return val; |
| 493 | } |
| 494 | |
| 495 | inline uint16 |
| 496 | cpu_m68hc12_pop_uint16 (sim_cpu *proc) |
| 497 | { |
| 498 | uint16 addr = proc->cpu_regs.sp; |
| 499 | uint16 val; |
| 500 | |
| 501 | val = memory_read16 (proc, addr); |
| 502 | proc->cpu_regs.sp = addr + 2; |
| 503 | return val; |
| 504 | } |
| 505 | |
| 506 | /* Fetch a 8/16 bit value and update the PC. */ |
| 507 | inline uint8 |
| 508 | cpu_fetch8 (sim_cpu *proc) |
| 509 | { |
| 510 | uint16 addr = proc->cpu_regs.pc; |
| 511 | uint8 val; |
| 512 | |
| 513 | val = memory_read8 (proc, addr); |
| 514 | proc->cpu_regs.pc = addr + 1; |
| 515 | return val; |
| 516 | } |
| 517 | |
| 518 | inline uint16 |
| 519 | cpu_fetch16 (sim_cpu *proc) |
| 520 | { |
| 521 | uint16 addr = proc->cpu_regs.pc; |
| 522 | uint16 val; |
| 523 | |
| 524 | val = memory_read16 (proc, addr); |
| 525 | proc->cpu_regs.pc = addr + 2; |
| 526 | return val; |
| 527 | } |
| 528 | |
| 529 | extern void cpu_call (sim_cpu* proc, uint16 addr); |
| 530 | extern void cpu_exg (sim_cpu* proc, uint8 code); |
| 531 | extern void cpu_dbcc (sim_cpu* proc); |
| 532 | extern void cpu_special (sim_cpu *proc, enum M6811_Special special); |
| 533 | extern void cpu_move8 (sim_cpu *proc, uint8 op); |
| 534 | extern void cpu_move16 (sim_cpu *proc, uint8 op); |
| 535 | |
| 536 | extern uint16 cpu_fetch_relbranch (sim_cpu *proc); |
| 537 | extern uint16 cpu_fetch_relbranch16 (sim_cpu *proc); |
| 538 | extern void cpu_push_all (sim_cpu *proc); |
| 539 | extern void cpu_single_step (sim_cpu *proc); |
| 540 | |
| 541 | extern void cpu_info (SIM_DESC sd, sim_cpu *proc); |
| 542 | |
| 543 | extern int cpu_initialize (SIM_DESC sd, sim_cpu *cpu); |
| 544 | |
| 545 | /* Returns the address of a 68HC12 indexed operand. |
| 546 | Pre and post modifications are handled on the source register. */ |
| 547 | extern uint16 cpu_get_indexed_operand_addr (sim_cpu *cpu, int restricted); |
| 548 | |
| 549 | extern void cpu_return (sim_cpu *cpu); |
| 550 | extern void cpu_set_sp (sim_cpu *cpu, uint16 val); |
| 551 | extern int cpu_reset (sim_cpu *cpu); |
| 552 | extern int cpu_restart (sim_cpu *cpu); |
| 553 | extern void sim_memory_error (sim_cpu *cpu, SIM_SIGNAL excep, |
| 554 | uint16 addr, const char *message, ...); |
| 555 | extern void emul_os (int op, sim_cpu *cpu); |
| 556 | extern void cpu_interp_m6811 (sim_cpu *cpu); |
| 557 | extern void cpu_interp_m6812 (sim_cpu *cpu); |
| 558 | |
| 559 | extern int m68hc11cpu_set_oscillator (SIM_DESC sd, const char *port, |
| 560 | double ton, double toff, |
| 561 | signed64 repeat); |
| 562 | extern int m68hc11cpu_clear_oscillator (SIM_DESC sd, const char *port); |
| 563 | extern void m68hc11cpu_set_port (struct hw *me, sim_cpu *cpu, |
| 564 | unsigned addr, uint8 val); |
| 565 | |
| 566 | /* The current state of the processor; registers, memory, etc. */ |
| 567 | |
| 568 | struct sim_state { |
| 569 | sim_cpu *cpu[MAX_NR_PROCESSORS]; |
| 570 | sim_state_base base; |
| 571 | }; |
| 572 | |
| 573 | extern void sim_board_reset (SIM_DESC sd); |
| 574 | |
| 575 | #define PRINT_TIME 0x01 |
| 576 | #define PRINT_CYCLE 0x02 |
| 577 | extern const char *cycle_to_string (sim_cpu *cpu, signed64 t, int flags); |
| 578 | |
| 579 | #endif |
| 580 | |
| 581 | |