5 #include "mn10300_sim.h"
15 host_callback *mn10300_callback;
17 static SIM_OPEN_KIND sim_kind;
20 static struct hash_entry *lookup_hash PARAMS ((uint32 ins, int));
21 static long hash PARAMS ((long));
22 static void init_system PARAMS ((void));
27 struct hash_entry *next;
33 struct hash_entry hash_table[MAX_HASH+1];
36 /* This probably doesn't do a very good job at bucket filling, but
42 /* These are one byte insns. */
43 if ((insn & 0xffffff00) == 0)
45 if ((insn & 0xf0) == 0x00
46 || (insn & 0xf0) == 0x40)
47 return (insn & 0xf3) & 0x3f;
49 if ((insn & 0xf0) == 0x10
50 || (insn & 0xf0) == 0x30
51 || (insn & 0xf0) == 0x50)
52 return (insn & 0xfc) & 0x3f;
54 if ((insn & 0xf0) == 0x60
55 || (insn & 0xf0) == 0x70
56 || (insn & 0xf0) == 0x80
57 || (insn & 0xf0) == 0x90
58 || (insn & 0xf0) == 0xa0
59 || (insn & 0xf0) == 0xb0
60 || (insn & 0xf0) == 0xe0)
61 return (insn & 0xf0) & 0x3f;
63 return (insn & 0xff) & 0x3f;
66 /* These are two byte insns */
67 if ((insn & 0xffff0000) == 0)
69 if ((insn & 0xf000) == 0x2000
70 || (insn & 0xf000) == 0x5000)
71 return ((insn & 0xfc00) >> 8) & 0x3f;
73 if ((insn & 0xf000) == 0x4000)
74 return ((insn & 0xf300) >> 8) & 0x3f;
76 if ((insn & 0xf000) == 0x8000
77 || (insn & 0xf000) == 0x9000
78 || (insn & 0xf000) == 0xa000
79 || (insn & 0xf000) == 0xb000)
80 return ((insn & 0xf000) >> 8) & 0x3f;
82 return ((insn & 0xff00) >> 8) & 0x3f;
85 /* These are three byte insns. */
86 if ((insn & 0xff000000) == 0)
88 if ((insn & 0xf00000) == 0x000000)
89 return ((insn & 0xf30000) >> 16) & 0x3f;
91 if ((insn & 0xf00000) == 0x200000
92 || (insn & 0xf00000) == 0x300000)
93 return ((insn & 0xfc0000) >> 16) & 0x3f;
95 return ((insn & 0xff0000) >> 16) & 0x3f;
98 /* These are four byte or larger insns. */
99 return ((insn & 0xff000000) >> 24) & 0x3f;
102 static struct hash_entry *
103 lookup_hash (ins, length)
107 struct hash_entry *h;
109 h = &hash_table[hash(ins)];
111 while ((ins & h->mask) != h->opcode
112 || (length != h->ops->length))
116 (*mn10300_callback->printf_filtered) (mn10300_callback, "ERROR looking up hash for 0x%x, PC=0x%x\n", ins, PC);
124 /* FIXME These would more efficient to use than load_mem/store_mem,
125 but need to be changed to use the memory map. */
139 return (a[1] << 8) + (a[0]);
147 return (a[3]<<24) + (a[2]<<16) + (a[1]<<8) + (a[0]);
151 put_byte (addr, data)
160 put_half (addr, data)
166 a[1] = (data >> 8) & 0xff;
170 put_word (addr, data)
176 a[1] = (data >> 8) & 0xff;
177 a[2] = (data >> 16) & 0xff;
178 a[3] = (data >> 24) & 0xff;
183 load_mem_big (addr, len)
187 uint8 *p = addr + State.mem;
194 return p[0] << 8 | p[1];
196 return p[0] << 16 | p[1] << 8 | p[2];
198 return p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
209 uint8 *p = addr + State.mem;
216 return p[1] << 8 | p[0];
218 return p[2] << 16 | p[1] << 8 | p[0];
220 return p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0];
227 store_mem (addr, len, data)
232 uint8 *p = addr + State.mem;
262 State.mem = (uint8 *) calloc (1, 1 << power);
265 (*mn10300_callback->printf_filtered) (mn10300_callback, "Allocation of main memory failed.\n");
278 sim_write (sd, addr, buffer, size)
281 unsigned char *buffer;
288 for (i = 0; i < size; i++)
289 store_mem (addr + i, 1, buffer[i]);
300 struct hash_entry *h;
306 for (p = argv + 1; *p; ++p)
308 if (strcmp (*p, "-E") == 0)
309 ++p; /* ignore endian spec */
312 if (strcmp (*p, "-t") == 0)
313 mn10300_debug = DEBUG;
316 (*mn10300_callback->printf_filtered) (mn10300_callback, "ERROR: unsupported option(s): %s\n",*p);
319 /* put all the opcodes in the hash table */
320 for (s = Simops; s->func; s++)
322 h = &hash_table[hash(s->opcode)];
324 /* go to the last entry in the chain */
330 h->next = calloc(1,sizeof(struct hash_entry));
335 h->opcode = s->opcode;
338 /* fudge our descriptor for now */
344 sim_close (sd, quitting)
355 (*mn10300_callback->printf_filtered) (mn10300_callback, "sim_set_profile %d\n", n);
359 sim_set_profile_size (n)
362 (*mn10300_callback->printf_filtered) (mn10300_callback, "sim_set_profile_size %d\n", n);
366 sim_resume (sd, step, siggnal)
372 struct hash_entry *h;
375 State.exception = SIGTRAP;
381 unsigned long insn, extension;
383 /* Fetch the current instruction. */
384 inst = load_mem_big (PC, 1);
387 /* These are one byte insns. */
388 if ((inst & 0xf3) == 0x00
389 || (inst & 0xf0) == 0x10
390 || (inst & 0xfc) == 0x3c
391 || (inst & 0xf3) == 0x41
392 || (inst & 0xf3) == 0x40
393 || (inst & 0xfc) == 0x50
394 || (inst & 0xfc) == 0x54
395 || (inst & 0xf0) == 0x60
396 || (inst & 0xf0) == 0x70
397 || ((inst & 0xf0) == 0x80
398 && (inst & 0x0c) >> 2 != (inst & 0x03))
399 || ((inst & 0xf0) == 0x90
400 && (inst & 0x0c) >> 2 != (inst & 0x03))
401 || ((inst & 0xf0) == 0xa0
402 && (inst & 0x0c) >> 2 != (inst & 0x03))
403 || ((inst & 0xf0) == 0xb0
404 && (inst & 0x0c) >> 2 != (inst & 0x03))
405 || (inst & 0xff) == 0xcb
406 || (inst & 0xfc) == 0xd0
407 || (inst & 0xfc) == 0xd4
408 || (inst & 0xfc) == 0xd8
409 || (inst & 0xf0) == 0xe0
410 || (inst & 0xff) == 0xff)
413 h = lookup_hash (insn, 1);
415 (h->ops->func)(insn, extension);
419 /* These are two byte insns. */
420 else if ((inst & 0xf0) == 0x80
421 || (inst & 0xf0) == 0x90
422 || (inst & 0xf0) == 0xa0
423 || (inst & 0xf0) == 0xb0
424 || (inst & 0xfc) == 0x20
425 || (inst & 0xfc) == 0x28
426 || (inst & 0xf3) == 0x43
427 || (inst & 0xf3) == 0x42
428 || (inst & 0xfc) == 0x58
429 || (inst & 0xfc) == 0x5c
430 || ((inst & 0xf0) == 0xc0
431 && (inst & 0xff) != 0xcb
432 && (inst & 0xff) != 0xcc
433 && (inst & 0xff) != 0xcd)
434 || (inst & 0xff) == 0xf0
435 || (inst & 0xff) == 0xf1
436 || (inst & 0xff) == 0xf2
437 || (inst & 0xff) == 0xf3
438 || (inst & 0xff) == 0xf4
439 || (inst & 0xff) == 0xf5
440 || (inst & 0xff) == 0xf6)
442 insn = load_mem_big (PC, 2);
443 h = lookup_hash (insn, 2);
445 (h->ops->func)(insn, extension);
449 /* These are three byte insns. */
450 else if ((inst & 0xff) == 0xf8
451 || (inst & 0xff) == 0xcc
452 || (inst & 0xff) == 0xf9
453 || (inst & 0xf3) == 0x01
454 || (inst & 0xf3) == 0x02
455 || (inst & 0xf3) == 0x03
456 || (inst & 0xfc) == 0x24
457 || (inst & 0xfc) == 0x2c
458 || (inst & 0xfc) == 0x30
459 || (inst & 0xfc) == 0x34
460 || (inst & 0xfc) == 0x38
461 || (inst & 0xff) == 0xde
462 || (inst & 0xff) == 0xdf
463 || (inst & 0xff) == 0xcc)
465 insn = load_mem_big (PC, 3);
466 h = lookup_hash (insn, 3);
468 /* If it's a format D1 insn, "ret", or "retf" insn, then
469 there's no need to worry about endianness. Others have
470 a 16bit immediate in little endian form that we need to
472 if (h->ops->format == FMT_D1
473 || h->opcode == 0xdf0000
474 || h->opcode == 0xde0000)
475 (h->ops->func)(insn, extension);
479 insn |= load_mem (PC + 1, 2);
480 (h->ops->func)(insn, extension);
485 /* These are four byte insns. */
486 else if ((inst & 0xff) == 0xfa
487 || (inst & 0xff) == 0xfb)
489 insn = load_mem_big (PC, 4);
490 h = lookup_hash (insn, 4);
492 /* This must be a format D2 insn; a small number of such insns
493 don't have any 16bit immediates (they instead have two 8 bit
495 if (h->opcode == 0xfaf80000
496 || h->opcode == 0xfaf00000
497 || h->opcode == 0xfaf40000)
498 (h->ops->func)(insn, extension);
502 insn |= load_mem (PC + 2, 2);
503 (h->ops->func)(insn, extension);
508 /* These are five byte insns. */
509 else if ((inst & 0xff) == 0xcd
510 || (inst & 0xff) == 0xdc)
512 insn = load_mem_big (PC, 4);
513 h = lookup_hash (insn, 5);
515 /* This must be a format S4 insn. */
516 if (h->opcode == 0xdc000000)
518 /* A "jmp" instruction with a 32bit immediate stored
519 in little endian form. */
521 temp = load_mem (PC + 1, 4);
523 insn |= (temp & 0xffffff00) >> 8;
524 extension = temp & 0xff;
528 /* A "call" instruction with a 16bit immediate in little
531 temp = load_mem (PC + 1, 2);
534 extension = load_mem (PC + 4, 1);
536 (h->ops->func)(insn, extension);
540 /* These are six byte insns. */
541 else if ((inst & 0xff) == 0xfd
542 || (inst & 0xff) == 0xfc)
546 insn = load_mem_big (PC, 4);
547 h = lookup_hash (insn, 6);
549 temp = load_mem (PC + 2, 4);
551 insn |= (temp >> 16) & 0xffff;
552 extension = temp & 0xffff;
553 (h->ops->func)(insn, extension);
557 /* Else its a seven byte insns (in theory). */
560 insn = load_mem_big (PC, 4);
561 h = lookup_hash (insn, 7);
563 if (h->ops->format == FMT_S6)
567 temp = load_mem (PC + 1, 4);
569 insn |= (temp >> 8) & 0xffffff;
571 extension = (temp & 0xff) << 16;
572 extension |= load_mem (PC + 5, 1) << 8;
573 extension |= load_mem (PC + 6, 1);
579 temp = load_mem (PC + 2, 4);
581 insn |= (temp >> 16) & 0xffff;
582 extension = (temp & 0xffff) << 8;
583 extension = load_mem (PC + 6, 1);
585 (h->ops->func)(insn, extension);
589 while (!State.exception);
597 mn10300_debug = DEBUG;
599 sim_resume (sd, 0, 0);
604 sim_info (sd, verbose)
608 (*mn10300_callback->printf_filtered) (mn10300_callback, "sim_info\n");
612 sim_create_inferior (sd, argv, env)
628 sim_set_callbacks (sd, p)
632 mn10300_callback = p;
635 /* All the code for exiting, signals, etc needs to be revamped.
637 This is enough to get c-torture limping though. */
640 sim_stop_reason (sd, reason, sigrc)
642 enum sim_stop *reason;
645 *reason = sim_stopped;
646 if (State.exception == SIGQUIT)
649 *sigrc = State.exception;
653 sim_fetch_register (sd, rn, memory)
656 unsigned char *memory;
658 put_word (memory, State.regs[rn]);
662 sim_store_register (sd, rn, memory)
665 unsigned char *memory;
667 State.regs[rn] = get_word (memory);
671 sim_read (sd, addr, buffer, size)
674 unsigned char *buffer;
678 for (i = 0; i < size; i++)
679 buffer[i] = load_mem (addr + i, 1);
685 sim_do_command (sd, cmd)
689 (*mn10300_callback->printf_filtered) (mn10300_callback, "\"%s\" is not a valid mn10300 simulator command.\n", cmd);
693 sim_load (sd, prog, abfd, from_tty)
699 extern bfd *sim_load_file (); /* ??? Don't know where this should live. */
702 prog_bfd = sim_load_file (sd, myname, mn10300_callback, prog, abfd,
703 sim_kind == SIM_OPEN_DEBUG);
704 if (prog_bfd == NULL)
706 PC = bfd_get_start_address (prog_bfd);
708 bfd_close (prog_bfd);