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
391void 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;
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 // TODO: error check
413}
414
415void GBAYankROM(struct GBA* gba) {
416 gba->yankedRomSize = gba->memory.romSize;
417 gba->memory.romSize = 0;
418 gba->memory.romMask = 0;
419 GBARaiseIRQ(gba, IRQ_GAMEPAK);
420}
421
422void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
423 gba->biosVf = vf;
424 uint32_t* bios = vf->map(vf, SIZE_BIOS, MAP_READ);
425 if (!bios) {
426 GBALog(gba, GBA_LOG_WARN, "Couldn't map BIOS");
427 return;
428 }
429 gba->memory.bios = bios;
430 gba->memory.fullBios = 1;
431 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
432 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
433 if (checksum == GBA_BIOS_CHECKSUM) {
434 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
435 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
436 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
437 } else {
438 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
439 }
440 gba->biosChecksum = checksum;
441 if (gba->memory.activeRegion == REGION_BIOS) {
442 gba->cpu->memory.activeRegion = gba->memory.bios;
443 }
444 // TODO: error check
445}
446
447void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
448 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
449 if (!patchedSize || patchedSize > SIZE_CART0) {
450 return;
451 }
452 gba->memory.rom = anonymousMemoryMap(SIZE_CART0);
453 if (!patch->applyPatch(patch, gba->pristineRom, gba->pristineRomSize, gba->memory.rom, patchedSize)) {
454 mappedMemoryFree(gba->memory.rom, patchedSize);
455 gba->memory.rom = gba->pristineRom;
456 return;
457 }
458 gba->memory.romSize = patchedSize;
459 gba->memory.romMask = SIZE_CART0 - 1;
460 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
461}
462
463void GBATimerUpdateRegister(struct GBA* gba, int timer) {
464 struct GBATimer* currentTimer = &gba->timers[timer];
465 if (currentTimer->enable && !currentTimer->countUp) {
466 int32_t prefetchSkew = 0;
467 if (gba->memory.lastPrefetchedPc - gba->memory.lastPrefetchedLoads * WORD_SIZE_THUMB >= (uint32_t) gba->cpu->gprs[ARM_PC]) {
468 prefetchSkew = (gba->memory.lastPrefetchedPc - gba->cpu->gprs[ARM_PC]) * (gba->cpu->memory.activeSeqCycles16 + 1) / WORD_SIZE_THUMB;
469 }
470 // Reading this takes two cycles (1N+1I), so let's remove them preemptively
471 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent - 2 + prefetchSkew) >> currentTimer->prescaleBits);
472 }
473}
474
475void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
476 gba->timers[timer].reload = reload;
477 gba->timers[timer].overflowInterval = (0x10000 - gba->timers[timer].reload) << gba->timers[timer].prescaleBits;
478}
479
480void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
481 struct GBATimer* currentTimer = &gba->timers[timer];
482 GBATimerUpdateRegister(gba, timer);
483
484 int oldPrescale = currentTimer->prescaleBits;
485 switch (control & 0x0003) {
486 case 0x0000:
487 currentTimer->prescaleBits = 0;
488 break;
489 case 0x0001:
490 currentTimer->prescaleBits = 6;
491 break;
492 case 0x0002:
493 currentTimer->prescaleBits = 8;
494 break;
495 case 0x0003:
496 currentTimer->prescaleBits = 10;
497 break;
498 }
499 currentTimer->countUp = !!(control & 0x0004);
500 currentTimer->doIrq = !!(control & 0x0040);
501 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
502 int wasEnabled = currentTimer->enable;
503 currentTimer->enable = !!(control & 0x0080);
504 if (!wasEnabled && currentTimer->enable) {
505 if (!currentTimer->countUp) {
506 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
507 } else {
508 currentTimer->nextEvent = INT_MAX;
509 }
510 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
511 currentTimer->oldReload = currentTimer->reload;
512 currentTimer->lastEvent = gba->cpu->cycles;
513 gba->timersEnabled |= 1 << timer;
514 } else if (wasEnabled && !currentTimer->enable) {
515 if (!currentTimer->countUp) {
516 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
517 }
518 gba->timersEnabled &= ~(1 << timer);
519 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
520 // FIXME: this might be before present
521 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
522 }
523
524 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
525 gba->cpu->nextEvent = currentTimer->nextEvent;
526 }
527};
528
529void GBAWriteIE(struct GBA* gba, uint16_t value) {
530 if (value & (1 << IRQ_KEYPAD)) {
531 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
532 }
533
534 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
535 ARMRaiseIRQ(gba->cpu);
536 }
537}
538
539void GBAWriteIME(struct GBA* gba, uint16_t value) {
540 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
541 ARMRaiseIRQ(gba->cpu);
542 }
543}
544
545void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
546 gba->memory.io[REG_IF >> 1] |= 1 << irq;
547 gba->cpu->halted = 0;
548
549 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
550 ARMRaiseIRQ(gba->cpu);
551 }
552}
553
554void GBATestIRQ(struct ARMCore* cpu) {
555 struct GBA* gba = (struct GBA*) cpu->master;
556 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
557 gba->springIRQ = 1;
558 gba->cpu->nextEvent = 0;
559 }
560}
561
562void GBAHalt(struct GBA* gba) {
563 gba->cpu->nextEvent = 0;
564 gba->cpu->halted = 1;
565}
566
567void GBAStop(struct GBA* gba) {
568 if (!gba->stopCallback) {
569 return;
570 }
571 gba->cpu->nextEvent = 0;
572 gba->stopCallback->stop(gba->stopCallback);
573}
574
575static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
576 struct GBAThread* threadContext = GBAThreadGetContext();
577 enum GBALogLevel logLevel = GBA_LOG_ALL;
578
579 if (gba) {
580 logLevel = gba->logLevel;
581 }
582
583 if (threadContext) {
584 logLevel = threadContext->logLevel;
585 gba = threadContext->gba;
586 }
587
588 if (!(level & logLevel) && level != GBA_LOG_FATAL) {
589 return;
590 }
591
592 if (level == GBA_LOG_FATAL && gba) {
593 gba->cpu->nextEvent = 0;
594 }
595
596 if (threadContext) {
597 if (level == GBA_LOG_FATAL) {
598 MutexLock(&threadContext->stateMutex);
599 threadContext->state = THREAD_CRASHED;
600 MutexUnlock(&threadContext->stateMutex);
601 }
602 }
603 if (gba && gba->logHandler) {
604 gba->logHandler(threadContext, level, format, args);
605 return;
606 }
607
608 vprintf(format, args);
609 printf("\n");
610
611 if (level == GBA_LOG_FATAL && !threadContext) {
612 abort();
613 }
614}
615
616void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
617 va_list args;
618 va_start(args, format);
619 _GBAVLog(gba, level, format, args);
620 va_end(args);
621}
622
623void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
624 struct GBA* gba = 0;
625 if (debugger->cpu) {
626 gba = (struct GBA*) debugger->cpu->master;
627 }
628
629 enum GBALogLevel gbaLevel;
630 switch (level) {
631 default: // Avoids compiler warning
632 case DEBUGGER_LOG_DEBUG:
633 gbaLevel = GBA_LOG_DEBUG;
634 break;
635 case DEBUGGER_LOG_INFO:
636 gbaLevel = GBA_LOG_INFO;
637 break;
638 case DEBUGGER_LOG_WARN:
639 gbaLevel = GBA_LOG_WARN;
640 break;
641 case DEBUGGER_LOG_ERROR:
642 gbaLevel = GBA_LOG_ERROR;
643 break;
644 }
645 va_list args;
646 va_start(args, format);
647 _GBAVLog(gba, gbaLevel, format, args);
648 va_end(args);
649}
650
651bool GBAIsROM(struct VFile* vf) {
652 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
653 return false;
654 }
655 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
656 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
657 return false;
658 }
659 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
660}
661
662bool GBAIsBIOS(struct VFile* vf) {
663 if (vf->seek(vf, 0, SEEK_SET) < 0) {
664 return false;
665 }
666 uint32_t interruptTable[7];
667 if (vf->read(vf, &interruptTable, sizeof(interruptTable)) != sizeof(interruptTable)) {
668 return false;
669 }
670 int i;
671 for (i = 0; i < 7; ++i) {
672 if ((interruptTable[i] & 0xFFFF0000) != 0xEA000000) {
673 return false;
674 }
675 }
676 return true;
677}
678
679void GBAGetGameCode(struct GBA* gba, char* out) {
680 if (!gba->memory.rom) {
681 out[0] = '\0';
682 return;
683 }
684 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->id, 4);
685}
686
687void GBAGetGameTitle(struct GBA* gba, char* out) {
688 if (!gba->memory.rom) {
689 strncpy(out, "(BIOS)", 12);
690 return;
691 }
692 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
693}
694
695void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
696 struct GBA* gba = (struct GBA*) cpu->master;
697 enum GBALogLevel level = GBA_LOG_ERROR;
698 if (gba->debugger) {
699 level = GBA_LOG_STUB;
700 struct DebuggerEntryInfo info = {
701 .address = _ARMPCAddress(cpu),
702 .opcode = opcode
703 };
704 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
705 }
706 GBALog(gba, level, "Stub opcode: %08x", opcode);
707}
708
709void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
710 struct GBA* gba = (struct GBA*) cpu->master;
711 if (!gba->yankedRomSize) {
712 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
713 }
714 if (gba->debugger) {
715 struct DebuggerEntryInfo info = {
716 .address = _ARMPCAddress(cpu),
717 .opcode = opcode
718 };
719 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP, &info);
720 } else {
721 ARMRaiseUndefined(cpu);
722 }
723}
724
725void GBABreakpoint(struct ARMCore* cpu, int immediate) {
726 struct GBA* gba = (struct GBA*) cpu->master;
727 if (immediate >= GBA_COMPONENT_MAX) {
728 return;
729 }
730 switch (immediate) {
731 case GBA_COMPONENT_DEBUGGER:
732 if (gba->debugger) {
733 struct DebuggerEntryInfo info = {
734 .address = _ARMPCAddress(cpu)
735 };
736 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_BREAKPOINT, &info);
737 }
738 break;
739 case GBA_COMPONENT_CHEAT_DEVICE:
740 if (gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
741 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
742 struct GBACheatHook* hook = 0;
743 size_t i;
744 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
745 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
746 if (cheats->hook && cheats->hook->address == _ARMPCAddress(cpu)) {
747 GBACheatRefresh(device, cheats);
748 hook = cheats->hook;
749 }
750 }
751 if (hook) {
752 ARMRunFake(cpu, hook->patchedOpcode);
753 }
754 }
755 break;
756 default:
757 break;
758 }
759}
760
761void GBAFrameStarted(struct GBA* gba) {
762 UNUSED(gba);
763
764 struct GBAThread* thread = GBAThreadGetContext();
765 if (!thread) {
766 return;
767 }
768
769 if (thread->rewindBuffer) {
770 --thread->rewindBufferNext;
771 if (thread->rewindBufferNext <= 0) {
772 thread->rewindBufferNext = thread->rewindBufferInterval;
773 GBARecordFrame(thread);
774 }
775 }
776}
777
778void GBAFrameEnded(struct GBA* gba) {
779 GBASavedataClean(&gba->memory.savedata, gba->video.frameCounter);
780
781 if (gba->rr) {
782 gba->rr->nextFrame(gba->rr);
783 }
784
785 if (gba->cpu->components && gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
786 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
787 size_t i;
788 for (i = 0; i < GBACheatSetsSize(&device->cheats); ++i) {
789 struct GBACheatSet* cheats = *GBACheatSetsGetPointer(&device->cheats, i);
790 if (!cheats->hook) {
791 GBACheatRefresh(device, cheats);
792 }
793 }
794 }
795
796 if (gba->stream) {
797 gba->stream->postVideoFrame(gba->stream, gba->video.renderer);
798 }
799
800 if (gba->memory.hw.devices & (HW_GB_PLAYER | HW_GB_PLAYER_DETECTION)) {
801 GBAHardwarePlayerUpdate(gba);
802 }
803
804 struct GBAThread* thread = GBAThreadGetContext();
805 if (!thread) {
806 return;
807 }
808
809 if (thread->frameCallback) {
810 thread->frameCallback(thread);
811 }
812}
813
814void GBASetBreakpoint(struct GBA* gba, struct ARMComponent* component, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
815 size_t immediate;
816 for (immediate = 0; immediate < gba->cpu->numComponents; ++immediate) {
817 if (gba->cpu->components[immediate] == component) {
818 break;
819 }
820 }
821 if (immediate == gba->cpu->numComponents) {
822 return;
823 }
824 if (mode == MODE_ARM) {
825 int32_t value;
826 int32_t old;
827 value = 0xE1200070;
828 value |= immediate & 0xF;
829 value |= (immediate & 0xFFF0) << 4;
830 GBAPatch32(gba->cpu, address, value, &old);
831 *opcode = old;
832 } else {
833 int16_t value;
834 int16_t old;
835 value = 0xBE00;
836 value |= immediate & 0xFF;
837 GBAPatch16(gba->cpu, address, value, &old);
838 *opcode = (uint16_t) old;
839 }
840}
841
842void GBAClearBreakpoint(struct GBA* gba, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
843 if (mode == MODE_ARM) {
844 GBAPatch32(gba->cpu, address, opcode, 0);
845 } else {
846 GBAPatch16(gba->cpu, address, opcode, 0);
847 }
848}
849
850static bool _setSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t* opcode) {
851 GBASetBreakpoint((struct GBA*) debugger->cpu->master, &debugger->d, address, mode, opcode);
852 return true;
853}
854
855static bool _clearSoftwareBreakpoint(struct ARMDebugger* debugger, uint32_t address, enum ExecutionMode mode, uint32_t opcode) {
856 GBAClearBreakpoint((struct GBA*) debugger->cpu->master, address, mode, opcode);
857 return true;
858}