src/gba/gba.c (view raw)
1/* Copyright (c) 2013-2015 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/cheats.h"
10#include "gba/io.h"
11#include "gba/supervisor/rr.h"
12#include "gba/supervisor/thread.h"
13#include "gba/serialize.h"
14#include "gba/sio.h"
15
16#include "isa-inlines.h"
17
18#include "util/crc32.h"
19#include "util/memory.h"
20#include "util/math.h"
21#include "util/patch.h"
22#include "util/vfs.h"
23
24const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
25const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
26
27static const size_t GBA_ROM_MAGIC_OFFSET = 3;
28static const uint8_t GBA_ROM_MAGIC[] = { 0xEA };
29
30static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
31static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
32static void GBAProcessEvents(struct ARMCore* cpu);
33static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
34static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
35static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
36static void GBABreakpoint(struct ARMCore* cpu, int immediate);
37
38static bool _setSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t* opcode);
39static bool _clearSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t opcode);
40
41void GBACreate(struct GBA* gba) {
42 gba->d.id = GBA_COMPONENT_MAGIC;
43 gba->d.init = GBAInit;
44 gba->d.deinit = 0;
45}
46
47static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
48 struct GBA* gba = (struct GBA*) component;
49 gba->cpu = cpu;
50 gba->debugger = 0;
51 gba->sync = 0;
52
53 GBAInterruptHandlerInit(&cpu->irqh);
54 GBAMemoryInit(gba);
55 GBASavedataInit(&gba->memory.savedata, 0);
56
57 gba->video.p = gba;
58 GBAVideoInit(&gba->video);
59
60 gba->audio.p = gba;
61 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
62
63 GBAIOInit(gba);
64
65 gba->sio.p = gba;
66 GBASIOInit(&gba->sio);
67
68 gba->timersEnabled = 0;
69 memset(gba->timers, 0, sizeof(gba->timers));
70
71 gba->springIRQ = 0;
72 gba->keySource = 0;
73 gba->rotationSource = 0;
74 gba->luminanceSource = 0;
75 gba->rtcSource = 0;
76 gba->rumble = 0;
77 gba->rr = 0;
78
79 gba->romVf = 0;
80 gba->biosVf = 0;
81
82 gba->logHandler = 0;
83 gba->logLevel = GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
84 gba->stream = 0;
85 gba->keyCallback = 0;
86 gba->stopCallback = 0;
87
88 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
89
90 gba->idleOptimization = IDLE_LOOP_REMOVE;
91 gba->idleLoop = IDLE_LOOP_NONE;
92 gba->lastJump = 0;
93 gba->haltPending = false;
94 gba->idleDetectionStep = 0;
95 gba->idleDetectionFailures = 0;
96
97 gba->realisticTiming = true;
98 gba->hardCrash = true;
99
100 gba->performingDMA = false;
101}
102
103void GBAUnloadROM(struct GBA* gba) {
104 if (gba->memory.rom && gba->pristineRom != gba->memory.rom) {
105 if (gba->yankedRomSize) {
106 gba->yankedRomSize = 0;
107 }
108 mappedMemoryFree(gba->memory.rom, SIZE_CART0);
109 }
110 gba->memory.rom = 0;
111
112 if (gba->romVf) {
113 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
114 gba->pristineRom = 0;
115 gba->romVf = 0;
116 }
117}
118
119void GBADestroy(struct GBA* gba) {
120 GBAUnloadROM(gba);
121
122 if (gba->biosVf) {
123 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
124 }
125
126 GBAMemoryDeinit(gba);
127 GBAVideoDeinit(&gba->video);
128 GBAAudioDeinit(&gba->audio);
129 GBASIODeinit(&gba->sio);
130 gba->rr = 0;
131}
132
133void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
134 irqh->reset = GBAReset;
135 irqh->processEvents = GBAProcessEvents;
136 irqh->swi16 = GBASwi16;
137 irqh->swi32 = GBASwi32;
138 irqh->hitIllegal = GBAIllegal;
139 irqh->readCPSR = GBATestIRQ;
140 irqh->hitStub = GBAHitStub;
141 irqh->bkpt16 = GBABreakpoint;
142 irqh->bkpt32 = GBABreakpoint;
143}
144
145void GBAReset(struct ARMCore* cpu) {
146 ARMSetPrivilegeMode(cpu, MODE_IRQ);
147 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
148 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
149 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
150 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
151 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
152
153 struct GBA* gba = (struct GBA*) cpu->master;
154 if (!gba->rr || (!gba->rr->isPlaying(gba->rr) && !gba->rr->isRecording(gba->rr))) {
155 GBASavedataUnmask(&gba->memory.savedata);
156 }
157
158 if (gba->yankedRomSize) {
159 gba->memory.romSize = gba->yankedRomSize;
160 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
161 gba->yankedRomSize = 0;
162 }
163 GBAMemoryReset(gba);
164 GBAVideoReset(&gba->video);
165 GBAAudioReset(&gba->audio);
166 GBAIOInit(gba);
167
168 GBASIOReset(&gba->sio);
169
170 gba->timersEnabled = 0;
171 memset(gba->timers, 0, sizeof(gba->timers));
172}
173
174void GBASkipBIOS(struct ARMCore* cpu) {
175 if (cpu->gprs[ARM_PC] == BASE_RESET + WORD_SIZE_ARM) {
176 cpu->gprs[ARM_PC] = BASE_CART0;
177 int currentCycles = 0;
178 ARM_WRITE_PC;
179 }
180}
181
182static void GBAProcessEvents(struct ARMCore* cpu) {
183 do {
184 struct GBA* gba = (struct GBA*) cpu->master;
185 int32_t cycles = cpu->nextEvent;
186 int32_t nextEvent = INT_MAX;
187 int32_t testEvent;
188#ifndef NDEBUG
189 if (cycles < 0) {
190 GBALog(gba, GBA_LOG_FATAL, "Negative cycles passed: %i", cycles);
191 }
192#endif
193
194 gba->bus = cpu->prefetch[1];
195 if (cpu->executionMode == MODE_THUMB) {
196 gba->bus |= cpu->prefetch[1] << 16;
197 }
198
199 if (gba->springIRQ) {
200 ARMRaiseIRQ(cpu);
201 gba->springIRQ = 0;
202 }
203
204 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
205 if (testEvent < nextEvent) {
206 nextEvent = testEvent;
207 }
208
209 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
210 if (testEvent < nextEvent) {
211 nextEvent = testEvent;
212 }
213
214 testEvent = GBATimersProcessEvents(gba, cycles);
215 if (testEvent < nextEvent) {
216 nextEvent = testEvent;
217 }
218
219 testEvent = GBAMemoryRunDMAs(gba, cycles);
220 if (testEvent < nextEvent) {
221 nextEvent = testEvent;
222 }
223
224 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
225 if (testEvent < nextEvent) {
226 nextEvent = testEvent;
227 }
228
229 cpu->cycles -= cycles;
230 cpu->nextEvent = nextEvent;
231
232 if (cpu->halted) {
233 cpu->cycles = cpu->nextEvent;
234 }
235 } while (cpu->cycles >= cpu->nextEvent);
236}
237
238static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
239 int32_t nextEvent = INT_MAX;
240 if (gba->timersEnabled) {
241 struct GBATimer* timer;
242 struct GBATimer* nextTimer;
243
244 timer = &gba->timers[0];
245 if (timer->enable) {
246 timer->nextEvent -= cycles;
247 timer->lastEvent -= cycles;
248 while (timer->nextEvent <= 0) {
249 timer->lastEvent = timer->nextEvent;
250 timer->nextEvent += timer->overflowInterval;
251 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
252 timer->oldReload = timer->reload;
253
254 if (timer->doIrq) {
255 GBARaiseIRQ(gba, IRQ_TIMER0);
256 }
257
258 if (gba->audio.enable) {
259 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
260 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
261 }
262
263 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
264 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
265 }
266 }
267
268 nextTimer = &gba->timers[1];
269 if (nextTimer->countUp) {
270 ++gba->memory.io[REG_TM1CNT_LO >> 1];
271 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
272 nextTimer->nextEvent = 0;
273 }
274 }
275 }
276 nextEvent = timer->nextEvent;
277 }
278
279 timer = &gba->timers[1];
280 if (timer->enable) {
281 timer->nextEvent -= cycles;
282 timer->lastEvent -= cycles;
283 if (timer->nextEvent <= 0) {
284 timer->lastEvent = timer->nextEvent;
285 timer->nextEvent += timer->overflowInterval;
286 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
287 timer->oldReload = timer->reload;
288
289 if (timer->doIrq) {
290 GBARaiseIRQ(gba, IRQ_TIMER1);
291 }
292
293 if (gba->audio.enable) {
294 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
295 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
296 }
297
298 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
299 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
300 }
301 }
302
303 if (timer->countUp) {
304 timer->nextEvent = INT_MAX;
305 }
306
307 nextTimer = &gba->timers[2];
308 if (nextTimer->countUp) {
309 ++gba->memory.io[REG_TM2CNT_LO >> 1];
310 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
311 nextTimer->nextEvent = 0;
312 }
313 }
314 }
315 if (timer->nextEvent < nextEvent) {
316 nextEvent = timer->nextEvent;
317 }
318 }
319
320 timer = &gba->timers[2];
321 if (timer->enable) {
322 timer->nextEvent -= cycles;
323 timer->lastEvent -= cycles;
324 if (timer->nextEvent <= 0) {
325 timer->lastEvent = timer->nextEvent;
326 timer->nextEvent += timer->overflowInterval;
327 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
328 timer->oldReload = timer->reload;
329
330 if (timer->doIrq) {
331 GBARaiseIRQ(gba, IRQ_TIMER2);
332 }
333
334 if (timer->countUp) {
335 timer->nextEvent = INT_MAX;
336 }
337
338 nextTimer = &gba->timers[3];
339 if (nextTimer->countUp) {
340 ++gba->memory.io[REG_TM3CNT_LO >> 1];
341 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
342 nextTimer->nextEvent = 0;
343 }
344 }
345 }
346 if (timer->nextEvent < nextEvent) {
347 nextEvent = timer->nextEvent;
348 }
349 }
350
351 timer = &gba->timers[3];
352 if (timer->enable) {
353 timer->nextEvent -= cycles;
354 timer->lastEvent -= cycles;
355 if (timer->nextEvent <= 0) {
356 timer->lastEvent = timer->nextEvent;
357 timer->nextEvent += timer->overflowInterval;
358 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
359 timer->oldReload = timer->reload;
360
361 if (timer->doIrq) {
362 GBARaiseIRQ(gba, IRQ_TIMER3);
363 }
364
365 if (timer->countUp) {
366 timer->nextEvent = INT_MAX;
367 }
368 }
369 if (timer->nextEvent < nextEvent) {
370 nextEvent = timer->nextEvent;
371 }
372 }
373 }
374 return nextEvent;
375}
376
377void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
378 debugger->setSoftwareBreakpoint = _setSoftwareBreakpoint;
379 debugger->clearSoftwareBreakpoint = _clearSoftwareBreakpoint;
380 gba->debugger = debugger;
381 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = &debugger->d;
382 ARMHotplugAttach(gba->cpu, GBA_COMPONENT_DEBUGGER);
383}
384
385void GBADetachDebugger(struct GBA* gba) {
386 gba->debugger = 0;
387 ARMHotplugDetach(gba->cpu, GBA_COMPONENT_DEBUGGER);
388 gba->cpu->components[GBA_COMPONENT_DEBUGGER] = 0;
389}
390
391bool GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
392 GBAUnloadROM(gba);
393 gba->romVf = vf;
394 gba->pristineRomSize = vf->size(vf);
395 vf->seek(vf, 0, SEEK_SET);
396 if (gba->pristineRomSize > SIZE_CART0) {
397 gba->pristineRomSize = SIZE_CART0;
398 }
399 gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
400 if (!gba->pristineRom) {
401 GBALog(gba, GBA_LOG_WARN, "Couldn't map ROM");
402 return false;
403 }
404 gba->yankedRomSize = 0;
405 gba->memory.rom = gba->pristineRom;
406 gba->activeFile = fname;
407 gba->memory.romSize = gba->pristineRomSize;
408 gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
409 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
410 GBASavedataInit(&gba->memory.savedata, sav);
411 GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
412 return true;
413 // TODO: error check
414}
415
416void GBAYankROM(struct GBA* gba) {
417 gba->yankedRomSize = gba->memory.romSize;
418 gba->memory.romSize = 0;
419 gba->memory.romMask = 0;
420 GBARaiseIRQ(gba, IRQ_GAMEPAK);
421}
422
423void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
424 gba->biosVf = vf;
425 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
426 if (!bios) {
427 GBALog(gba, GBA_LOG_WARN, "Couldn't map BIOS");
428 return;
429 }
430 gba->memory.bios = bios;
431 gba->memory.fullBios = 1;
432 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
433 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
434 if (checksum == GBA_BIOS_CHECKSUM) {
435 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
436 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
437 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
438 } else {
439 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
440 }
441 gba->biosChecksum = checksum;
442 if (gba->memory.activeRegion == REGION_BIOS) {
443 gba->cpu->memory.activeRegion = gba->memory.bios;
444 }
445 // TODO: error check
446}
447
448void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
449 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
450 if (!patchedSize || patchedSize > SIZE_CART0) {
451 return;
452 }
453 gba->memory.rom = anonymousMemoryMap(SIZE_CART0);
454 if (!patch->applyPatch(patch, gba->pristineRom, gba->pristineRomSize, gba->memory.rom, patchedSize)) {
455 mappedMemoryFree(gba->memory.rom, patchedSize);
456 gba->memory.rom = gba->pristineRom;
457 return;
458 }
459 gba->memory.romSize = patchedSize;
460 gba->memory.romMask = SIZE_CART0 - 1;
461 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
462}
463
464void GBATimerUpdateRegister(struct GBA* gba, int timer) {
465 struct GBATimer* currentTimer = &gba->timers[timer];
466 if (currentTimer->enable && !currentTimer->countUp) {
467 int32_t prefetchSkew = 0;
468 if (gba->memory.lastPrefetchedPc - gba->memory.lastPrefetchedLoads * WORD_SIZE_THUMB >= (uint32_t) gba->cpu->gprs[ARM_PC]) {
469 prefetchSkew = (gba->memory.lastPrefetchedPc - gba->cpu->gprs[ARM_PC]) * (gba->cpu->memory.activeSeqCycles16 + 1) / WORD_SIZE_THUMB;
470 }
471 // Reading this takes two cycles (1N+1I), so let's remove them preemptively
472 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent - 2 + prefetchSkew) >> currentTimer->prescaleBits);
473 }
474}
475
476void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
477 gba->timers[timer].reload = reload;
478 gba->timers[timer].overflowInterval = (0x10000 - gba->timers[timer].reload) << gba->timers[timer].prescaleBits;
479}
480
481void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
482 struct GBATimer* currentTimer = &gba->timers[timer];
483 GBATimerUpdateRegister(gba, timer);
484
485 int oldPrescale = currentTimer->prescaleBits;
486 switch (control & 0x0003) {
487 case 0x0000:
488 currentTimer->prescaleBits = 0;
489 break;
490 case 0x0001:
491 currentTimer->prescaleBits = 6;
492 break;
493 case 0x0002:
494 currentTimer->prescaleBits = 8;
495 break;
496 case 0x0003:
497 currentTimer->prescaleBits = 10;
498 break;
499 }
500 currentTimer->countUp = !!(control & 0x0004);
501 currentTimer->doIrq = !!(control & 0x0040);
502 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
503 int wasEnabled = currentTimer->enable;
504 currentTimer->enable = !!(control & 0x0080);
505 if (!wasEnabled && currentTimer->enable) {
506 if (!currentTimer->countUp) {
507 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
508 } else {
509 currentTimer->nextEvent = INT_MAX;
510 }
511 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
512 currentTimer->oldReload = currentTimer->reload;
513 currentTimer->lastEvent = gba->cpu->cycles;
514 gba->timersEnabled |= 1 << timer;
515 } else if (wasEnabled && !currentTimer->enable) {
516 if (!currentTimer->countUp) {
517 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
518 }
519 gba->timersEnabled &= ~(1 << timer);
520 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
521 // FIXME: this might be before present
522 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
523 }
524
525 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
526 gba->cpu->nextEvent = currentTimer->nextEvent;
527 }
528};
529
530void GBAWriteIE(struct GBA* gba, uint16_t value) {
531 if (value & (1 << IRQ_KEYPAD)) {
532 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
533 }
534
535 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
536 ARMRaiseIRQ(gba->cpu);
537 }
538}
539
540void GBAWriteIME(struct GBA* gba, uint16_t value) {
541 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
542 ARMRaiseIRQ(gba->cpu);
543 }
544}
545
546void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
547 gba->memory.io[REG_IF >> 1] |= 1 << irq;
548 gba->cpu->halted = 0;
549
550 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
551 ARMRaiseIRQ(gba->cpu);
552 }
553}
554
555void GBATestIRQ(struct ARMCore* cpu) {
556 struct GBA* gba = (struct GBA*) cpu->master;
557 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
558 gba->springIRQ = 1;
559 gba->cpu->nextEvent = 0;
560 }
561}
562
563void GBAHalt(struct GBA* gba) {
564 gba->cpu->nextEvent = 0;
565 gba->cpu->halted = 1;
566}
567
568void GBAStop(struct GBA* gba) {
569 if (!gba->stopCallback) {
570 return;
571 }
572 gba->cpu->nextEvent = 0;
573 gba->stopCallback->stop(gba->stopCallback);
574}
575
576static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
577 struct GBAThread* threadContext = GBAThreadGetContext();
578 enum GBALogLevel logLevel = GBA_LOG_ALL;
579
580 if (gba) {
581 logLevel = gba->logLevel;
582 }
583
584 if (threadContext) {
585 logLevel = threadContext->logLevel;
586 gba = threadContext->gba;
587 }
588
589 if (!(level & logLevel) && level != GBA_LOG_FATAL) {
590 return;
591 }
592
593 if (level == GBA_LOG_FATAL && gba) {
594 gba->cpu->nextEvent = 0;
595 }
596
597 if (threadContext) {
598 if (level == GBA_LOG_FATAL) {
599 MutexLock(&threadContext->stateMutex);
600 threadContext->state = THREAD_CRASHED;
601 MutexUnlock(&threadContext->stateMutex);
602 }
603 }
604 if (gba && gba->logHandler) {
605 gba->logHandler(threadContext, level, format, args);
606 return;
607 }
608
609 vprintf(format, args);
610 printf("\n");
611
612 if (level == GBA_LOG_FATAL && !threadContext) {
613 abort();
614 }
615}
616
617void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
618 va_list args;
619 va_start(args, format);
620 _GBAVLog(gba, level, format, args);
621 va_end(args);
622}
623
624void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
625 struct GBA* gba = 0;
626 if (debugger->cpu) {
627 gba = (struct GBA*) debugger->cpu->master;
628 }
629
630 enum GBALogLevel gbaLevel;
631 switch (level) {
632 default: // Avoids compiler warning
633 case DEBUGGER_LOG_DEBUG:
634 gbaLevel = GBA_LOG_DEBUG;
635 break;
636 case DEBUGGER_LOG_INFO:
637 gbaLevel = GBA_LOG_INFO;
638 break;
639 case DEBUGGER_LOG_WARN:
640 gbaLevel = GBA_LOG_WARN;
641 break;
642 case DEBUGGER_LOG_ERROR:
643 gbaLevel = GBA_LOG_ERROR;
644 break;
645 }
646 va_list args;
647 va_start(args, format);
648 _GBAVLog(gba, gbaLevel, format, args);
649 va_end(args);
650}
651
652bool GBAIsROM(struct VFile* vf) {
653 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
654 return false;
655 }
656 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
657 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
658 return false;
659 }
660 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
661}
662
663bool GBAIsBIOS(struct VFile* vf) {
664 if (vf->seek(vf, 0, SEEK_SET) < 0) {
665 return false;
666 }
667 uint32_t interruptTable[7];
668 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
669 return false;
670 }
671 int i;
672 for (i = 0; i < 7; ++i) {
673 if ((interruptTable[i] & 0xFFFF0000) != 0xEA000000) {
674 return false;
675 }
676 }
677 return true;
678}
679
680void GBAGetGameCode(struct GBA* gba, char* out) {
681 if (!gba->memory.rom) {
682 out[0] = '\0';
683 return;
684 }
685 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->id, 4);
686}
687
688void GBAGetGameTitle(struct GBA* gba, char* out) {
689 if (!gba->memory.rom) {
690 strncpy(out, "(BIOS)", 12);
691 return;
692 }
693 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
694}
695
696void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
697 struct GBA* gba = (struct GBA*) cpu->master;
698 enum GBALogLevel level = GBA_LOG_ERROR;
699 if (gba->debugger) {
700 level = GBA_LOG_STUB;
701 struct DebuggerEntryInfo info = {
702 .address = _ARMPCAddress(cpu),
703 .opcode = opcode
704 };
705 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
706 }
707 GBALog(gba, level, "Stub opcode: %08x", opcode);
708}
709
710void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
711 struct GBA* gba = (struct GBA*) cpu->master;
712 if (!gba->yankedRomSize) {
713 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
714 }
715 if (gba->debugger) {
716 struct DebuggerEntryInfo info = {
717 .address = _ARMPCAddress(cpu),
718 .opcode = opcode
719 };
720 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
721 } else {
722 ARMRaiseUndefined(cpu);
723 }
724}
725
726void GBABreakpoint(struct ARMCore* cpu, int immediate) {
727 struct GBA* gba = (struct GBA*) cpu->master;
728 if (immediate >= GBA_COMPONENT_MAX) {
729 return;
730 }
731 switch (immediate) {
732 case GBA_COMPONENT_DEBUGGER:
733 if (gba->debugger) {
734 struct DebuggerEntryInfo info = {
735 .address = _ARMPCAddress(cpu)
736 };
737 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_BREAKPOINT, &info);
738 }
739 break;
740 case GBA_COMPONENT_CHEAT_DEVICE:
741 if (gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
742 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
743 struct GBACheatHook* hook = 0;
744 size_t i;
745 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
746 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
747 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
748 GBACheatRefresh(device, cheats);
749 hook = cheats->hook;
750 }
751 }
752 if (hook) {
753 ARMRunFake(cpu, hook->patchedOpcode);
754 }
755 }
756 break;
757 default:
758 break;
759 }
760}
761
762void GBAFrameStarted(struct GBA* gba) {
763 UNUSED(gba);
764
765 struct GBAThread* thread = GBAThreadGetContext();
766 if (!thread) {
767 return;
768 }
769
770 if (thread->rewindBuffer) {
771 --thread->rewindBufferNext;
772 if (thread->rewindBufferNext <= 0) {
773 thread->rewindBufferNext = thread->rewindBufferInterval;
774 GBARecordFrame(thread);
775 }
776 }
777}
778
779void GBAFrameEnded(struct GBA* gba) {
780 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
781
782 if (gba->rr) {
783 gba->rr->nextFrame(gba->rr);
784 }
785
786 if (gba->cpu->components && gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
787 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
788 size_t i;
789 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
790 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
791 if (!cheats->hook) {
792 GBACheatRefresh(device, cheats);
793 }
794 }
795 }
796
797 if (gba->stream) {
798 gba->stream->postVideoFrame(gba->stream, gba->video.renderer);
799 }
800
801 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
802 GBAHardwarePlayerUpdate(gba);
803 }
804
805 struct GBAThread* thread = GBAThreadGetContext();
806 if (!thread) {
807 return;
808 }
809
810 if (thread->frameCallback) {
811 thread->frameCallback(thread);
812 }
813}
814
815void GBASetBreakpoint(struct GBA* gba, struct ARMComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
816 size_t immediate;
817 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
818 if (gba->cpu->components[immediate] == component) {
819 break;
820 }
821 }
822 if (immediate == gba->cpu->numComponents) {
823 return;
824 }
825 if (mode == MODE_ARM) {
826 int32_t value;
827 int32_t old;
828 value = 0xE1200070;
829 value |= immediate & 0xF;
830 value |= (immediate & 0xFFF0) << 4;
831 GBAPatch32(gba->cpu, address, value, &old);
832 *opcode = old;
833 } else {
834 int16_t value;
835 int16_t old;
836 value = 0xBE00;
837 value |= immediate & 0xFF;
838 GBAPatch16(gba->cpu, address, value, &old);
839 *opcode = (uint16_t) old;
840 }
841}
842
843void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
844 if (mode == MODE_ARM) {
845 GBAPatch32(gba->cpu, address, opcode, 0);
846 } else {
847 GBAPatch16(gba->cpu, address, opcode, 0);
848 }
849}
850
851static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
852 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d, address, mode, opcode);
853 return true;
854}
855
856static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
857 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
858 return true;
859}