451ab91e |
1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
2 | * Mupen64plus - interupt.c * |
3 | * Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ * |
4 | * Copyright (C) 2002 Hacktarux * |
5 | * * |
6 | * This program is free software; you can redistribute it and/or modify * |
7 | * it under the terms of the GNU General Public License as published by * |
8 | * the Free Software Foundation; either version 2 of the License, or * |
9 | * (at your option) any later version. * |
10 | * * |
11 | * This program is distributed in the hope that it will be useful, * |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
14 | * GNU General Public License for more details. * |
15 | * * |
16 | * You should have received a copy of the GNU General Public License * |
17 | * along with this program; if not, write to the * |
18 | * Free Software Foundation, Inc., * |
19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * |
20 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
21 | |
22 | #include <stdlib.h> |
23 | |
24 | #include <SDL.h> |
25 | |
26 | #define M64P_CORE_PROTOTYPES 1 |
27 | #include "api/m64p_types.h" |
28 | #include "api/callbacks.h" |
29 | #include "api/m64p_vidext.h" |
30 | #include "api/vidext.h" |
31 | #include "memory/memory.h" |
32 | #include "main/rom.h" |
33 | #include "main/main.h" |
34 | #include "main/savestates.h" |
35 | #include "main/cheat.h" |
36 | #include "osd/osd.h" |
37 | #include "plugin/plugin.h" |
38 | |
39 | #include "interupt.h" |
40 | #include "r4300.h" |
41 | #include "macros.h" |
42 | #include "exception.h" |
43 | #include "reset.h" |
44 | #include "new_dynarec/new_dynarec.h" |
45 | |
46 | #ifdef WITH_LIRC |
47 | #include "main/lirc.h" |
48 | #endif |
49 | |
50 | unsigned int next_vi; |
51 | int vi_field=0; |
52 | static int vi_counter=0; |
53 | |
54 | int interupt_unsafe_state = 0; |
55 | |
56 | typedef struct _interupt_queue |
57 | { |
58 | int type; |
59 | unsigned int count; |
60 | struct _interupt_queue *next; |
61 | } interupt_queue; |
62 | |
63 | static interupt_queue *q = NULL; |
64 | |
65 | static void clear_queue(void) |
66 | { |
67 | while(q != NULL) |
68 | { |
69 | interupt_queue *aux = q->next; |
70 | free(q); |
71 | q = aux; |
72 | } |
73 | } |
74 | |
75 | /*static void print_queue(void) |
76 | { |
77 | interupt_queue *aux; |
78 | //if (Count < 0x7000000) return; |
79 | DebugMessage(M64MSG_INFO, "------------------ 0x%x", (unsigned int)Count); |
80 | aux = q; |
81 | while (aux != NULL) |
82 | { |
83 | DebugMessage(M64MSG_INFO, "Count:%x, %x", (unsigned int)aux->count, aux->type); |
84 | aux = aux->next; |
85 | } |
86 | }*/ |
87 | |
88 | static int SPECIAL_done = 0; |
89 | |
90 | static int before_event(unsigned int evt1, unsigned int evt2, int type2) |
91 | { |
92 | if(evt1 - Count < 0x80000000) |
93 | { |
94 | if(evt2 - Count < 0x80000000) |
95 | { |
96 | if((evt1 - Count) < (evt2 - Count)) return 1; |
97 | else return 0; |
98 | } |
99 | else |
100 | { |
101 | if((Count - evt2) < 0x10000000) |
102 | { |
103 | switch(type2) |
104 | { |
105 | case SPECIAL_INT: |
106 | if(SPECIAL_done) return 1; |
107 | else return 0; |
108 | break; |
109 | default: |
110 | return 0; |
111 | } |
112 | } |
113 | else return 1; |
114 | } |
115 | } |
116 | else return 0; |
117 | } |
118 | |
119 | void add_interupt_event(int type, unsigned int delay) |
120 | { |
121 | unsigned int count = Count + delay/**2*/; |
122 | int special = 0; |
123 | interupt_queue *aux = q; |
124 | |
125 | if(type == SPECIAL_INT /*|| type == COMPARE_INT*/) special = 1; |
126 | if(Count > 0x80000000) SPECIAL_done = 0; |
127 | |
128 | if (get_event(type)) { |
129 | DebugMessage(M64MSG_WARNING, "two events of type 0x%x in interrupt queue", type); |
130 | } |
131 | |
132 | if (q == NULL) |
133 | { |
134 | q = (interupt_queue *) malloc(sizeof(interupt_queue)); |
135 | q->next = NULL; |
136 | q->count = count; |
137 | q->type = type; |
138 | next_interupt = q->count; |
139 | //print_queue(); |
140 | return; |
141 | } |
142 | |
143 | if(before_event(count, q->count, q->type) && !special) |
144 | { |
145 | q = (interupt_queue *) malloc(sizeof(interupt_queue)); |
146 | q->next = aux; |
147 | q->count = count; |
148 | q->type = type; |
149 | next_interupt = q->count; |
150 | //print_queue(); |
151 | return; |
152 | } |
153 | |
154 | while (aux->next != NULL && (!before_event(count, aux->next->count, aux->next->type) || special)) |
155 | aux = aux->next; |
156 | |
157 | if (aux->next == NULL) |
158 | { |
159 | aux->next = (interupt_queue *) malloc(sizeof(interupt_queue)); |
160 | aux = aux->next; |
161 | aux->next = NULL; |
162 | aux->count = count; |
163 | aux->type = type; |
164 | } |
165 | else |
166 | { |
167 | interupt_queue *aux2; |
168 | if (type != SPECIAL_INT) |
169 | while(aux->next != NULL && aux->next->count == count) |
170 | aux = aux->next; |
171 | aux2 = aux->next; |
172 | aux->next = (interupt_queue *) malloc(sizeof(interupt_queue)); |
173 | aux = aux->next; |
174 | aux->next = aux2; |
175 | aux->count = count; |
176 | aux->type = type; |
177 | } |
178 | } |
179 | |
180 | void add_interupt_event_count(int type, unsigned int count) |
181 | { |
182 | add_interupt_event(type, (count - Count)/*/2*/); |
183 | } |
184 | |
185 | static void remove_interupt_event(void) |
186 | { |
187 | interupt_queue *aux = q->next; |
188 | if(q->type == SPECIAL_INT) SPECIAL_done = 1; |
189 | free(q); |
190 | q = aux; |
191 | if (q != NULL && (q->count > Count || (Count - q->count) < 0x80000000)) |
192 | next_interupt = q->count; |
193 | else |
194 | next_interupt = 0; |
195 | } |
196 | |
197 | unsigned int get_event(int type) |
198 | { |
199 | interupt_queue *aux = q; |
200 | if (q == NULL) return 0; |
201 | if (q->type == type) |
202 | return q->count; |
203 | while (aux->next != NULL && aux->next->type != type) |
204 | aux = aux->next; |
205 | if (aux->next != NULL) |
206 | return aux->next->count; |
207 | return 0; |
208 | } |
209 | |
210 | int get_next_event_type(void) |
211 | { |
212 | if (q == NULL) return 0; |
213 | return q->type; |
214 | } |
215 | |
216 | void remove_event(int type) |
217 | { |
218 | interupt_queue *aux = q; |
219 | if (q == NULL) return; |
220 | if (q->type == type) |
221 | { |
222 | aux = aux->next; |
223 | free(q); |
224 | q = aux; |
225 | return; |
226 | } |
227 | while (aux->next != NULL && aux->next->type != type) |
228 | aux = aux->next; |
229 | if (aux->next != NULL) // it's a type int |
230 | { |
231 | interupt_queue *aux2 = aux->next->next; |
232 | free(aux->next); |
233 | aux->next = aux2; |
234 | } |
235 | } |
236 | |
237 | void translate_event_queue(unsigned int base) |
238 | { |
239 | interupt_queue *aux; |
240 | remove_event(COMPARE_INT); |
241 | remove_event(SPECIAL_INT); |
242 | aux=q; |
243 | while (aux != NULL) |
244 | { |
245 | aux->count = (aux->count - Count)+base; |
246 | aux = aux->next; |
247 | } |
248 | add_interupt_event_count(COMPARE_INT, Compare); |
249 | add_interupt_event_count(SPECIAL_INT, 0); |
250 | } |
251 | |
252 | int save_eventqueue_infos(char *buf) |
253 | { |
254 | int len = 0; |
255 | interupt_queue *aux = q; |
256 | if (q == NULL) |
257 | { |
258 | *((unsigned int*)&buf[0]) = 0xFFFFFFFF; |
259 | return 4; |
260 | } |
261 | while (aux != NULL) |
262 | { |
263 | memcpy(buf+len , &aux->type , 4); |
264 | memcpy(buf+len+4, &aux->count, 4); |
265 | len += 8; |
266 | aux = aux->next; |
267 | } |
268 | *((unsigned int*)&buf[len]) = 0xFFFFFFFF; |
269 | return len+4; |
270 | } |
271 | |
272 | void load_eventqueue_infos(char *buf) |
273 | { |
274 | int len = 0; |
275 | clear_queue(); |
276 | while (*((unsigned int*)&buf[len]) != 0xFFFFFFFF) |
277 | { |
278 | int type = *((unsigned int*)&buf[len]); |
279 | unsigned int count = *((unsigned int*)&buf[len+4]); |
280 | add_interupt_event_count(type, count); |
281 | len += 8; |
282 | } |
283 | } |
284 | |
285 | void init_interupt(void) |
286 | { |
287 | SPECIAL_done = 1; |
288 | next_vi = next_interupt = 5000; |
289 | vi_register.vi_delay = next_vi; |
290 | vi_field = 0; |
291 | clear_queue(); |
292 | add_interupt_event_count(VI_INT, next_vi); |
293 | add_interupt_event_count(SPECIAL_INT, 0); |
294 | } |
295 | |
296 | void check_interupt(void) |
297 | { |
298 | if (MI_register.mi_intr_reg & MI_register.mi_intr_mask_reg) |
299 | Cause = (Cause | 0x400) & 0xFFFFFF83; |
300 | else |
301 | Cause &= ~0x400; |
302 | if ((Status & 7) != 1) return; |
303 | if (Status & Cause & 0xFF00) |
304 | { |
305 | if(q == NULL) |
306 | { |
307 | q = (interupt_queue *) malloc(sizeof(interupt_queue)); |
308 | q->next = NULL; |
309 | q->count = Count; |
310 | q->type = CHECK_INT; |
311 | } |
312 | else |
313 | { |
314 | interupt_queue* aux = (interupt_queue *) malloc(sizeof(interupt_queue)); |
315 | aux->next = q; |
316 | aux->count = Count; |
317 | aux->type = CHECK_INT; |
318 | q = aux; |
319 | } |
320 | next_interupt = Count; |
321 | } |
322 | } |
323 | |
324 | void gen_interupt(void) |
325 | { |
326 | if (stop == 1) |
327 | { |
328 | vi_counter = 0; // debug |
329 | dyna_stop(); |
330 | } |
331 | |
332 | if (!interupt_unsafe_state) |
333 | { |
334 | if (savestates_get_job() == savestates_job_load) |
335 | { |
336 | savestates_load(); |
337 | return; |
338 | } |
339 | |
340 | if (reset_hard_job) |
341 | { |
342 | reset_hard(); |
343 | reset_hard_job = 0; |
344 | return; |
345 | } |
346 | } |
347 | |
348 | if (skip_jump) |
349 | { |
350 | unsigned int dest = skip_jump; |
351 | skip_jump = 0; |
352 | |
353 | if (q->count > Count || (Count - q->count) < 0x80000000) |
354 | next_interupt = q->count; |
355 | else |
356 | next_interupt = 0; |
357 | |
358 | last_addr = dest; |
359 | generic_jump_to(dest); |
360 | return; |
361 | } |
362 | |
363 | switch(q->type) |
364 | { |
365 | case SPECIAL_INT: |
366 | if (Count > 0x10000000) return; |
367 | remove_interupt_event(); |
368 | add_interupt_event_count(SPECIAL_INT, 0); |
369 | return; |
370 | break; |
371 | case VI_INT: |
372 | if(vi_counter < 60) |
373 | { |
374 | if (vi_counter == 0) |
375 | cheat_apply_cheats(ENTRY_BOOT); |
376 | vi_counter++; |
377 | } |
378 | else |
379 | { |
380 | cheat_apply_cheats(ENTRY_VI); |
381 | } |
382 | gfx.updateScreen(); |
383 | #ifdef WITH_LIRC |
384 | lircCheckInput(); |
385 | #endif |
386 | SDL_PumpEvents(); |
387 | |
388 | refresh_stat(); |
389 | |
390 | // if paused, poll for input events |
391 | if(rompause) |
392 | { |
393 | osd_render(); // draw Paused message in case gfx.updateScreen didn't do it |
394 | VidExt_GL_SwapBuffers(); |
395 | while(rompause) |
396 | { |
397 | SDL_Delay(10); |
398 | SDL_PumpEvents(); |
399 | #ifdef WITH_LIRC |
400 | lircCheckInput(); |
401 | #endif //WITH_LIRC |
402 | } |
403 | } |
404 | |
405 | new_vi(); |
406 | if (vi_register.vi_v_sync == 0) vi_register.vi_delay = 500000; |
407 | else vi_register.vi_delay = ((vi_register.vi_v_sync + 1)*1500); |
408 | next_vi += vi_register.vi_delay; |
409 | if (vi_register.vi_status&0x40) vi_field=1-vi_field; |
410 | else vi_field=0; |
411 | |
412 | remove_interupt_event(); |
413 | add_interupt_event_count(VI_INT, next_vi); |
414 | |
415 | MI_register.mi_intr_reg |= 0x08; |
416 | if (MI_register.mi_intr_reg & MI_register.mi_intr_mask_reg) |
417 | Cause = (Cause | 0x400) & 0xFFFFFF83; |
418 | else |
419 | return; |
420 | if ((Status & 7) != 1) return; |
421 | if (!(Status & Cause & 0xFF00)) return; |
422 | break; |
423 | |
424 | case COMPARE_INT: |
425 | remove_interupt_event(); |
426 | Count+=2; |
427 | add_interupt_event_count(COMPARE_INT, Compare); |
428 | Count-=2; |
429 | |
430 | Cause = (Cause | 0x8000) & 0xFFFFFF83; |
431 | if ((Status & 7) != 1) return; |
432 | if (!(Status & Cause & 0xFF00)) return; |
433 | break; |
434 | |
435 | case CHECK_INT: |
436 | remove_interupt_event(); |
437 | break; |
438 | |
439 | case SI_INT: |
440 | #ifdef WITH_LIRC |
441 | lircCheckInput(); |
442 | #endif //WITH_LIRC |
443 | SDL_PumpEvents(); |
444 | PIF_RAMb[0x3F] = 0x0; |
445 | remove_interupt_event(); |
446 | MI_register.mi_intr_reg |= 0x02; |
447 | si_register.si_stat |= 0x1000; |
448 | if (MI_register.mi_intr_reg & MI_register.mi_intr_mask_reg) |
449 | Cause = (Cause | 0x400) & 0xFFFFFF83; |
450 | else |
451 | return; |
452 | if ((Status & 7) != 1) return; |
453 | if (!(Status & Cause & 0xFF00)) return; |
454 | break; |
455 | |
456 | case PI_INT: |
457 | remove_interupt_event(); |
458 | MI_register.mi_intr_reg |= 0x10; |
459 | pi_register.read_pi_status_reg &= ~3; |
460 | if (MI_register.mi_intr_reg & MI_register.mi_intr_mask_reg) |
461 | Cause = (Cause | 0x400) & 0xFFFFFF83; |
462 | else |
463 | return; |
464 | if ((Status & 7) != 1) return; |
465 | if (!(Status & Cause & 0xFF00)) return; |
466 | break; |
467 | |
468 | case AI_INT: |
469 | if (ai_register.ai_status & 0x80000000) // full |
470 | { |
471 | unsigned int ai_event = get_event(AI_INT); |
472 | remove_interupt_event(); |
473 | ai_register.ai_status &= ~0x80000000; |
474 | ai_register.current_delay = ai_register.next_delay; |
475 | ai_register.current_len = ai_register.next_len; |
476 | add_interupt_event_count(AI_INT, ai_event+ai_register.next_delay); |
477 | |
478 | MI_register.mi_intr_reg |= 0x04; |
479 | if (MI_register.mi_intr_reg & MI_register.mi_intr_mask_reg) |
480 | Cause = (Cause | 0x400) & 0xFFFFFF83; |
481 | else |
482 | return; |
483 | if ((Status & 7) != 1) return; |
484 | if (!(Status & Cause & 0xFF00)) return; |
485 | } |
486 | else |
487 | { |
488 | remove_interupt_event(); |
489 | ai_register.ai_status &= ~0x40000000; |
490 | |
491 | //------- |
492 | MI_register.mi_intr_reg |= 0x04; |
493 | if (MI_register.mi_intr_reg & MI_register.mi_intr_mask_reg) |
494 | Cause = (Cause | 0x400) & 0xFFFFFF83; |
495 | else |
496 | return; |
497 | if ((Status & 7) != 1) return; |
498 | if (!(Status & Cause & 0xFF00)) return; |
499 | } |
500 | break; |
501 | |
502 | case SP_INT: |
503 | remove_interupt_event(); |
504 | sp_register.sp_status_reg |= 0x203; |
505 | // sp_register.sp_status_reg |= 0x303; |
506 | |
507 | if (!(sp_register.sp_status_reg & 0x40)) return; // !intr_on_break |
508 | MI_register.mi_intr_reg |= 0x01; |
509 | if (MI_register.mi_intr_reg & MI_register.mi_intr_mask_reg) |
510 | Cause = (Cause | 0x400) & 0xFFFFFF83; |
511 | else |
512 | return; |
513 | if ((Status & 7) != 1) return; |
514 | if (!(Status & Cause & 0xFF00)) return; |
515 | break; |
516 | |
517 | case DP_INT: |
518 | remove_interupt_event(); |
519 | dpc_register.dpc_status &= ~2; |
520 | dpc_register.dpc_status |= 0x81; |
521 | MI_register.mi_intr_reg |= 0x20; |
522 | if (MI_register.mi_intr_reg & MI_register.mi_intr_mask_reg) |
523 | Cause = (Cause | 0x400) & 0xFFFFFF83; |
524 | else |
525 | return; |
526 | if ((Status & 7) != 1) return; |
527 | if (!(Status & Cause & 0xFF00)) return; |
528 | break; |
529 | |
530 | case HW2_INT: |
531 | // Hardware Interrupt 2 -- remove interrupt event from queue |
532 | remove_interupt_event(); |
533 | // setup r4300 Status flags: reset TS, and SR, set IM2 |
534 | Status = (Status & ~0x00380000) | 0x1000; |
535 | Cause = (Cause | 0x1000) & 0xFFFFFF83; |
536 | /* the exception_general() call below will jump to the interrupt vector (0x80000180) and setup the |
537 | * interpreter or dynarec |
538 | */ |
539 | break; |
540 | |
541 | case NMI_INT: |
542 | // Non Maskable Interrupt -- remove interrupt event from queue |
543 | remove_interupt_event(); |
544 | // setup r4300 Status flags: reset TS and SR, set BEV, ERL, and SR |
545 | Status = (Status & ~0x00380000) | 0x00500004; |
546 | Cause = 0x00000000; |
547 | // simulate the soft reset code which would run from the PIF ROM |
548 | r4300_reset_soft(); |
549 | // clear all interrupts, reset interrupt counters back to 0 |
550 | Count = 0; |
551 | vi_counter = 0; |
552 | init_interupt(); |
553 | // clear the audio status register so that subsequent write_ai() calls will work properly |
554 | ai_register.ai_status = 0; |
555 | // set ErrorEPC with the last instruction address |
556 | ErrorEPC = PC->addr; |
557 | // reset the r4300 internal state |
558 | if (r4300emu != CORE_PURE_INTERPRETER) |
559 | { |
560 | // clear all the compiled instruction blocks and re-initialize |
561 | free_blocks(); |
562 | init_blocks(); |
563 | } |
564 | // adjust ErrorEPC if we were in a delay slot, and clear the delay_slot and dyna_interp flags |
565 | if(delay_slot==1 || delay_slot==3) |
566 | { |
567 | ErrorEPC-=4; |
568 | } |
569 | delay_slot = 0; |
570 | dyna_interp = 0; |
571 | // set next instruction address to reset vector |
572 | last_addr = 0xa4000040; |
573 | generic_jump_to(0xa4000040); |
574 | return; |
575 | |
576 | default: |
577 | DebugMessage(M64MSG_ERROR, "Unknown interrupt queue event type %.8X.", q->type); |
578 | remove_interupt_event(); |
579 | break; |
580 | } |
581 | |
582 | #ifdef NEW_DYNAREC |
583 | if (r4300emu == CORE_DYNAREC) { |
584 | EPC = pcaddr; |
585 | pcaddr = 0x80000180; |
586 | Status |= 2; |
587 | Cause &= 0x7FFFFFFF; |
588 | pending_exception=1; |
589 | } else { |
590 | exception_general(); |
591 | } |
592 | #else |
593 | exception_general(); |
594 | #endif |
595 | |
596 | if (!interupt_unsafe_state) |
597 | { |
598 | if (savestates_get_job() == savestates_job_save) |
599 | { |
600 | savestates_save(); |
601 | return; |
602 | } |
603 | } |
604 | } |
605 | |