src/gba/gba.c (view raw)
1/* Copyright (c) 2013-2014 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "gba.h"
7
8#include "gba-bios.h"
9#include "gba-io.h"
10#include "gba-rr.h"
11#include "gba-serialize.h"
12#include "gba-sio.h"
13#include "gba-thread.h"
14
15#include "isa-inlines.h"
16
17#include "util/crc32.h"
18#include "util/memory.h"
19#include "util/patch.h"
20#include "util/vfs.h"
21
22const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
23const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
24
25static const size_t GBA_ROM_MAGIC_OFFSET = 3;
26static const uint8_t GBA_ROM_MAGIC[] = { 0xEA };
27
28static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
29static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
30static void GBAProcessEvents(struct ARMCore* cpu);
31static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
32static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
33static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
34
35void GBACreate(struct GBA* gba) {
36 gba->d.id = GBA_COMPONENT_MAGIC;
37 gba->d.init = GBAInit;
38 gba->d.deinit = 0;
39}
40
41static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
42 struct GBA* gba = (struct GBA*) component;
43 gba->cpu = cpu;
44 gba->debugger = 0;
45
46 GBAInterruptHandlerInit(&cpu->irqh);
47 GBAMemoryInit(gba);
48 GBASavedataInit(&gba->memory.savedata, 0);
49
50 gba->video.p = gba;
51 GBAVideoInit(&gba->video);
52
53 gba->audio.p = gba;
54 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
55
56 GBAIOInit(gba);
57
58 gba->sio.p = gba;
59 GBASIOInit(&gba->sio);
60
61 gba->timersEnabled = 0;
62 memset(gba->timers, 0, sizeof(gba->timers));
63
64 gba->springIRQ = 0;
65 gba->keySource = 0;
66 gba->rotationSource = 0;
67 gba->luminanceSource = 0;
68 gba->rtcSource = 0;
69 gba->rumble = 0;
70 gba->rr = 0;
71
72 gba->romVf = 0;
73 gba->biosVf = 0;
74
75 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
76
77 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
78
79 gba->idleOptimization = IDLE_LOOP_REMOVE;
80 gba->idleLoop = IDLE_LOOP_NONE;
81 gba->lastJump = 0;
82 gba->idleDetectionStep = 0;
83 gba->idleDetectionFailures = 0;
84 gba->performingDMA = false;
85}
86
87void GBADestroy(struct GBA* gba) {
88 if (gba->pristineRom == gba->memory.rom) {
89 gba->memory.rom = 0;
90 }
91
92 if (gba->romVf) {
93 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
94 }
95
96 if (gba->biosVf) {
97 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
98 }
99
100 GBAMemoryDeinit(gba);
101 GBAVideoDeinit(&gba->video);
102 GBAAudioDeinit(&gba->audio);
103 GBARRContextDestroy(gba);
104}
105
106void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
107 irqh->reset = GBAReset;
108 irqh->processEvents = GBAProcessEvents;
109 irqh->swi16 = GBASwi16;
110 irqh->swi32 = GBASwi32;
111 irqh->hitIllegal = GBAIllegal;
112 irqh->readCPSR = GBATestIRQ;
113 irqh->hitStub = GBAHitStub;
114}
115
116void GBAReset(struct ARMCore* cpu) {
117 ARMSetPrivilegeMode(cpu, MODE_IRQ);
118 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
119 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
120 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
121 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
122 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
123
124 struct GBA* gba = (struct GBA*) cpu->master;
125 if (!GBARRIsPlaying(gba->rr) && !GBARRIsRecording(gba->rr)) {
126 GBASavedataUnmask(&gba->memory.savedata);
127 }
128 GBAMemoryReset(gba);
129 GBAVideoReset(&gba->video);
130 GBAAudioReset(&gba->audio);
131 GBAIOInit(gba);
132
133 GBASIODeinit(&gba->sio);
134 GBASIOInit(&gba->sio);
135
136 gba->timersEnabled = 0;
137 memset(gba->timers, 0, sizeof(gba->timers));
138}
139
140void GBASkipBIOS(struct ARMCore* cpu) {
141 if (cpu->gprs[ARM_PC] == BASE_RESET + WORD_SIZE_ARM) {
142 cpu->gprs[ARM_PC] = BASE_CART0;
143 int currentCycles = 0;
144 ARM_WRITE_PC;
145 }
146}
147
148static void GBAProcessEvents(struct ARMCore* cpu) {
149 do {
150 struct GBA* gba = (struct GBA*) cpu->master;
151 int32_t cycles = cpu->nextEvent;
152 int32_t nextEvent = INT_MAX;
153 int32_t testEvent;
154
155 gba->bus = cpu->prefetch[1];
156 if (cpu->executionMode == MODE_THUMB) {
157 gba->bus |= cpu->prefetch[1] << 16;
158 }
159
160 if (gba->springIRQ) {
161 ARMRaiseIRQ(cpu);
162 gba->springIRQ = 0;
163 }
164
165 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
166 if (testEvent < nextEvent) {
167 nextEvent = testEvent;
168 }
169
170 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
171 if (testEvent < nextEvent) {
172 nextEvent = testEvent;
173 }
174
175 testEvent = GBATimersProcessEvents(gba, cycles);
176 if (testEvent < nextEvent) {
177 nextEvent = testEvent;
178 }
179
180 testEvent = GBAMemoryRunDMAs(gba, cycles);
181 if (testEvent < nextEvent) {
182 nextEvent = testEvent;
183 }
184
185 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
186 if (testEvent < nextEvent) {
187 nextEvent = testEvent;
188 }
189
190 cpu->cycles -= cycles;
191 cpu->nextEvent = nextEvent;
192
193 if (cpu->halted) {
194 cpu->cycles = cpu->nextEvent;
195 }
196 } while (cpu->cycles >= cpu->nextEvent);
197}
198
199static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
200 int32_t nextEvent = INT_MAX;
201 if (gba->timersEnabled) {
202 struct GBATimer* timer;
203 struct GBATimer* nextTimer;
204
205 timer = &gba->timers[0];
206 if (timer->enable) {
207 timer->nextEvent -= cycles;
208 timer->lastEvent -= cycles;
209 if (timer->nextEvent <= 0) {
210 timer->lastEvent = timer->nextEvent;
211 timer->nextEvent += timer->overflowInterval;
212 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
213 timer->oldReload = timer->reload;
214
215 if (timer->doIrq) {
216 GBARaiseIRQ(gba, IRQ_TIMER0);
217 }
218
219 if (gba->audio.enable) {
220 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
221 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
222 }
223
224 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
225 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
226 }
227 }
228
229 nextTimer = &gba->timers[1];
230 if (nextTimer->countUp) {
231 ++gba->memory.io[REG_TM1CNT_LO >> 1];
232 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
233 nextTimer->nextEvent = 0;
234 }
235 }
236 }
237 nextEvent = timer->nextEvent;
238 }
239
240 timer = &gba->timers[1];
241 if (timer->enable) {
242 timer->nextEvent -= cycles;
243 timer->lastEvent -= cycles;
244 if (timer->nextEvent <= 0) {
245 timer->lastEvent = timer->nextEvent;
246 timer->nextEvent += timer->overflowInterval;
247 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
248 timer->oldReload = timer->reload;
249
250 if (timer->doIrq) {
251 GBARaiseIRQ(gba, IRQ_TIMER1);
252 }
253
254 if (gba->audio.enable) {
255 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
256 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
257 }
258
259 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
260 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
261 }
262 }
263
264 if (timer->countUp) {
265 timer->nextEvent = INT_MAX;
266 }
267
268 nextTimer = &gba->timers[2];
269 if (nextTimer->countUp) {
270 ++gba->memory.io[REG_TM2CNT_LO >> 1];
271 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
272 nextTimer->nextEvent = 0;
273 }
274 }
275 }
276 if (timer->nextEvent < nextEvent) {
277 nextEvent = timer->nextEvent;
278 }
279 }
280
281 timer = &gba->timers[2];
282 if (timer->enable) {
283 timer->nextEvent -= cycles;
284 timer->lastEvent -= cycles;
285 if (timer->nextEvent <= 0) {
286 timer->lastEvent = timer->nextEvent;
287 timer->nextEvent += timer->overflowInterval;
288 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
289 timer->oldReload = timer->reload;
290
291 if (timer->doIrq) {
292 GBARaiseIRQ(gba, IRQ_TIMER2);
293 }
294
295 if (timer->countUp) {
296 timer->nextEvent = INT_MAX;
297 }
298
299 nextTimer = &gba->timers[3];
300 if (nextTimer->countUp) {
301 ++gba->memory.io[REG_TM3CNT_LO >> 1];
302 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
303 nextTimer->nextEvent = 0;
304 }
305 }
306 }
307 if (timer->nextEvent < nextEvent) {
308 nextEvent = timer->nextEvent;
309 }
310 }
311
312 timer = &gba->timers[3];
313 if (timer->enable) {
314 timer->nextEvent -= cycles;
315 timer->lastEvent -= cycles;
316 if (timer->nextEvent <= 0) {
317 timer->lastEvent = timer->nextEvent;
318 timer->nextEvent += timer->overflowInterval;
319 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
320 timer->oldReload = timer->reload;
321
322 if (timer->doIrq) {
323 GBARaiseIRQ(gba, IRQ_TIMER3);
324 }
325
326 if (timer->countUp) {
327 timer->nextEvent = INT_MAX;
328 }
329 }
330 if (timer->nextEvent < nextEvent) {
331 nextEvent = timer->nextEvent;
332 }
333 }
334 }
335 return nextEvent;
336}
337
338void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
339 gba->debugger = debugger;
340 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = &debugger->d;
341 ARMHotplugAttach(gba->cpu, GBA_COMPONENT_DEBUGGER);
342}
343
344void GBADetachDebugger(struct GBA* gba) {
345 gba->debugger = 0;
346 ARMHotplugDetach(gba->cpu, GBA_COMPONENT_DEBUGGER);
347 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = 0;
348}
349
350void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
351 gba->romVf = vf;
352 gba->pristineRomSize = vf->size(vf);
353 vf->seek(vf, 0, SEEK_SET);
354 if (gba->pristineRomSize > SIZE_CART0) {
355 gba->pristineRomSize = SIZE_CART0;
356 }
357 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
358 if (!gba->pristineRom) {
359 GBALog(gba, GBA_LOG_WARN, "Couldn't map ROM");
360 return;
361 }
362 gba->memory.rom = gba->pristineRom;
363 gba->activeFile = fname;
364 gba->memory.romSize = gba->pristineRomSize;
365 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
366 GBASavedataInit(&gba->memory.savedata, sav);
367 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
368 // TODO: error check
369}
370
371void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
372 gba->biosVf = vf;
373 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
374 if (!bios) {
375 GBALog(gba, GBA_LOG_WARN, "Couldn't map BIOS");
376 return;
377 }
378 gba->memory.bios = bios;
379 gba->memory.fullBios = 1;
380 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
381 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
382 if (checksum == GBA_BIOS_CHECKSUM) {
383 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
384 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
385 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
386 } else {
387 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
388 }
389 gba->biosChecksum = checksum;
390 if (gba->memory.activeRegion == REGION_BIOS) {
391 gba->cpu->memory.activeRegion = gba->memory.bios;
392 }
393 // TODO: error check
394}
395
396void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
397 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
398 if (!patchedSize) {
399 return;
400 }
401 gba->memory.rom = anonymousMemoryMap(patchedSize);
402 if (!patch->applyPatch(patch, gba->pristineRom, gba->pristineRomSize, gba->memory.rom, patchedSize)) {
403 mappedMemoryFree(gba->memory.rom, patchedSize);
404 gba->memory.rom = gba->pristineRom;
405 return;
406 }
407 gba->memory.romSize = patchedSize;
408 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
409}
410
411void GBATimerUpdateRegister(struct GBA* gba, int timer) {
412 struct GBATimer* currentTimer = &gba->timers[timer];
413 if (currentTimer->enable && !currentTimer->countUp) {
414 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
415 }
416}
417
418void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
419 gba->timers[timer].reload = reload;
420}
421
422void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
423 struct GBATimer* currentTimer = &gba->timers[timer];
424 GBATimerUpdateRegister(gba, timer);
425
426 int oldPrescale = currentTimer->prescaleBits;
427 switch (control & 0x0003) {
428 case 0x0000:
429 currentTimer->prescaleBits = 0;
430 break;
431 case 0x0001:
432 currentTimer->prescaleBits = 6;
433 break;
434 case 0x0002:
435 currentTimer->prescaleBits = 8;
436 break;
437 case 0x0003:
438 currentTimer->prescaleBits = 10;
439 break;
440 }
441 currentTimer->countUp = !!(control & 0x0004);
442 currentTimer->doIrq = !!(control & 0x0040);
443 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
444 int wasEnabled = currentTimer->enable;
445 currentTimer->enable = !!(control & 0x0080);
446 if (!wasEnabled && currentTimer->enable) {
447 if (!currentTimer->countUp) {
448 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
449 } else {
450 currentTimer->nextEvent = INT_MAX;
451 }
452 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
453 currentTimer->oldReload = currentTimer->reload;
454 currentTimer->lastEvent = 0;
455 gba->timersEnabled |= 1 << timer;
456 } else if (wasEnabled && !currentTimer->enable) {
457 if (!currentTimer->countUp) {
458 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
459 }
460 gba->timersEnabled &= ~(1 << timer);
461 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
462 // FIXME: this might be before present
463 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
464 }
465
466 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
467 gba->cpu->nextEvent = currentTimer->nextEvent;
468 }
469};
470
471void GBAWriteIE(struct GBA* gba, uint16_t value) {
472 if (value & (1 << IRQ_KEYPAD)) {
473 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
474 }
475
476 if (value & (1 << IRQ_GAMEPAK)) {
477 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
478 }
479
480 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
481 ARMRaiseIRQ(gba->cpu);
482 }
483}
484
485void GBAWriteIME(struct GBA* gba, uint16_t value) {
486 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
487 ARMRaiseIRQ(gba->cpu);
488 }
489}
490
491void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
492 gba->memory.io[REG_IF >> 1] |= 1 << irq;
493 gba->cpu->halted = 0;
494
495 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
496 ARMRaiseIRQ(gba->cpu);
497 }
498}
499
500void GBATestIRQ(struct ARMCore* cpu) {
501 struct GBA* gba = (struct GBA*) cpu->master;
502 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
503 gba->springIRQ = 1;
504 gba->cpu->nextEvent = 0;
505 }
506}
507
508void GBAHalt(struct GBA* gba) {
509 gba->cpu->nextEvent = 0;
510 gba->cpu->halted = 1;
511}
512
513static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
514 struct GBAThread* threadContext = GBAThreadGetContext();
515 enum GBALogLevel logLevel = -1;
516
517 if (gba) {
518 logLevel = gba->logLevel;
519 }
520
521 if (threadContext) {
522 logLevel = threadContext->logLevel;
523 gba = threadContext->gba;
524 }
525
526 if (!(level & logLevel) && level != GBA_LOG_FATAL) {
527 return;
528 }
529
530 if (level == GBA_LOG_FATAL && gba) {
531 gba->cpu->nextEvent = 0;
532 }
533
534 if (threadContext) {
535 if (level == GBA_LOG_FATAL) {
536 MutexLock(&threadContext->stateMutex);
537 threadContext->state = THREAD_CRASHED;
538 MutexUnlock(&threadContext->stateMutex);
539 }
540 if (threadContext->logHandler) {
541 threadContext->logHandler(threadContext, level, format, args);
542 return;
543 }
544 }
545
546 vprintf(format, args);
547 printf("\n");
548
549 if (level == GBA_LOG_FATAL && !threadContext) {
550 abort();
551 }
552}
553
554void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
555 va_list args;
556 va_start(args, format);
557 _GBAVLog(gba, level, format, args);
558 va_end(args);
559}
560
561void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
562 struct GBA* gba = 0;
563 if (debugger->cpu) {
564 gba = (struct GBA*) debugger->cpu->master;
565 }
566
567 enum GBALogLevel gbaLevel;
568 switch (level) {
569 default: // Avoids compiler warning
570 case DEBUGGER_LOG_DEBUG:
571 gbaLevel = GBA_LOG_DEBUG;
572 break;
573 case DEBUGGER_LOG_INFO:
574 gbaLevel = GBA_LOG_INFO;
575 break;
576 case DEBUGGER_LOG_WARN:
577 gbaLevel = GBA_LOG_WARN;
578 break;
579 case DEBUGGER_LOG_ERROR:
580 gbaLevel = GBA_LOG_ERROR;
581 break;
582 }
583 va_list args;
584 va_start(args, format);
585 _GBAVLog(gba, gbaLevel, format, args);
586 va_end(args);
587}
588
589bool GBAIsROM(struct VFile* vf) {
590 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
591 return false;
592 }
593 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
594 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
595 return false;
596 }
597 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
598}
599
600bool GBAIsBIOS(struct VFile* vf) {
601 if (vf->seek(vf, 0, SEEK_SET) < 0) {
602 return false;
603 }
604 uint32_t interruptTable[7];
605 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
606 return false;
607 }
608 int i;
609 for (i = 0; i < 7; ++i) {
610 if ((interruptTable[i] & 0xFFFF0000) != 0xEA000000) {
611 return false;
612 }
613 }
614 return true;
615}
616
617void GBAGetGameCode(struct GBA* gba, char* out) {
618 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->id, 4);
619}
620
621void GBAGetGameTitle(struct GBA* gba, char* out) {
622 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
623}
624
625void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
626 struct GBA* gba = (struct GBA*) cpu->master;
627 enum GBALogLevel level = GBA_LOG_FATAL;
628 if (gba->debugger) {
629 level = GBA_LOG_STUB;
630 struct DebuggerEntryInfo info = {
631 .address = cpu->gprs[ARM_PC],
632 .opcode = opcode
633 };
634 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
635 }
636 GBALog(gba, level, "Stub opcode: %08x", opcode);
637}
638
639void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
640 struct GBA* gba = (struct GBA*) cpu->master;
641 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
642 if (gba->debugger) {
643 struct DebuggerEntryInfo info = {
644 .address = cpu->gprs[ARM_PC],
645 .opcode = opcode
646 };
647 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
648 }
649}
650
651void GBAFrameStarted(struct GBA* gba) {
652 UNUSED(gba);
653
654 struct GBAThread* thread = GBAThreadGetContext();
655 if (!thread) {
656 return;
657 }
658
659 if (thread->rewindBuffer) {
660 --thread->rewindBufferNext;
661 if (thread->rewindBufferNext <= 0) {
662 thread->rewindBufferNext = thread->rewindBufferInterval;
663 GBARecordFrame(thread);
664 }
665 }
666}
667
668void GBAFrameEnded(struct GBA* gba) {
669 if (gba->rr) {
670 GBARRNextFrame(gba->rr);
671 }
672
673 struct GBAThread* thread = GBAThreadGetContext();
674 if (!thread) {
675 return;
676 }
677
678 if (thread->stream) {
679 thread->stream->postVideoFrame(thread->stream, thread->renderer);
680 }
681
682 if (thread->frameCallback) {
683 thread->frameCallback(thread);
684 }
685}