src/gba/gba.c (view raw)
1#include "gba.h"
2
3#include "gba-bios.h"
4#include "gba-io.h"
5#include "gba-rr.h"
6#include "gba-sio.h"
7#include "gba-thread.h"
8
9#include "util/crc32.h"
10#include "util/memory.h"
11#include "util/patch.h"
12#include "util/vfs.h"
13
14const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
15const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
16
17static const size_t GBA_ROM_MAGIC_OFFSET = 2;
18static const uint8_t GBA_ROM_MAGIC[] = { 0x00, 0xEA };
19
20enum {
21 SP_BASE_SYSTEM = 0x03FFFF00,
22 SP_BASE_IRQ = 0x03FFFFA0,
23 SP_BASE_SUPERVISOR = 0x03FFFFE0
24};
25
26struct GBACartridgeOverride {
27 const char id[4];
28 enum SavedataType type;
29 int gpio;
30 uint32_t busyLoop;
31};
32
33static const struct GBACartridgeOverride _overrides[] = {
34 // Boktai: The Sun is in Your Hand
35 { "U3IE", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
36 { "U3IP", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
37
38 // Boktai 2: Solar Boy Django
39 { "U32E", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
40 { "U32P", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
41
42 // Drill Dozer
43 { "V49J", SAVEDATA_SRAM, GPIO_RUMBLE, -1 },
44 { "V49E", SAVEDATA_SRAM, GPIO_RUMBLE, -1 },
45
46 // Final Fantasy Tactics Advance
47 { "AFXE", SAVEDATA_FLASH512, GPIO_NONE, 0x8000418 },
48
49 // Mega Man Battle Network
50 { "AREE", SAVEDATA_SRAM, GPIO_NONE, 0x800032E },
51
52 // Pokemon Ruby
53 { "AXVJ", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
54 { "AXVE", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
55 { "AXVP", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
56 { "AXVI", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
57 { "AXVS", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
58 { "AXVD", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
59 { "AXVF", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
60
61 // Pokemon Sapphire
62 { "AXPJ", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
63 { "AXPE", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
64 { "AXPP", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
65 { "AXPI", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
66 { "AXPS", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
67 { "AXPD", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
68 { "AXPF", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
69
70 // Pokemon Emerald
71 { "BPEJ", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
72 { "BPEE", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
73 { "BPEP", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
74 { "BPEI", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
75 { "BPES", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
76 { "BPED", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
77 { "BPEF", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
78
79 // Pokemon FireRed
80 { "BPRJ", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
81 { "BPRE", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
82 { "BPRP", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
83
84 // Pokemon LeafGreen
85 { "BPGJ", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
86 { "BPGE", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
87 { "BPGP", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
88
89 // RockMan EXE 4.5 - Real Operation
90 { "BR4J", SAVEDATA_FLASH512, GPIO_RTC, -1 },
91
92 // Super Mario Advance 4
93 { "AX4J", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
94 { "AX4E", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
95 { "AX4P", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
96
97 // Wario Ware Twisted
98 { "RZWJ", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
99 { "RZWE", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
100 { "RZWP", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
101
102 { { 0, 0, 0, 0 }, 0, 0, -1 }
103};
104
105static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
106static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
107static void GBAProcessEvents(struct ARMCore* cpu);
108static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
109static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
110static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
111
112static void _checkOverrides(struct GBA* gba, uint32_t code);
113
114void GBACreate(struct GBA* gba) {
115 gba->d.id = GBA_COMPONENT_MAGIC;
116 gba->d.init = GBAInit;
117 gba->d.deinit = 0;
118}
119
120static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
121 struct GBA* gba = (struct GBA*) component;
122 gba->cpu = cpu;
123 gba->debugger = 0;
124
125 GBAInterruptHandlerInit(&cpu->irqh);
126 GBAMemoryInit(gba);
127 GBASavedataInit(&gba->memory.savedata, 0);
128
129 gba->video.p = gba;
130 GBAVideoInit(&gba->video);
131
132 gba->audio.p = gba;
133 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
134
135 GBAIOInit(gba);
136
137 gba->sio.p = gba;
138 GBASIOInit(&gba->sio);
139
140 gba->timersEnabled = 0;
141 memset(gba->timers, 0, sizeof(gba->timers));
142
143 gba->springIRQ = 0;
144 gba->keySource = 0;
145 gba->rotationSource = 0;
146 gba->rumble = 0;
147 gba->rr = 0;
148
149 gba->romVf = 0;
150 gba->biosVf = 0;
151
152 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
153
154 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
155
156 gba->busyLoop = -1;
157}
158
159void GBADestroy(struct GBA* gba) {
160 if (gba->pristineRom == gba->memory.rom) {
161 gba->memory.rom = 0;
162 }
163
164 if (gba->romVf) {
165 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
166 }
167
168 if (gba->biosVf) {
169 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
170 }
171
172 GBAMemoryDeinit(gba);
173 GBAVideoDeinit(&gba->video);
174 GBAAudioDeinit(&gba->audio);
175 GBARRContextDestroy(gba);
176}
177
178void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
179 irqh->reset = GBAReset;
180 irqh->processEvents = GBAProcessEvents;
181 irqh->swi16 = GBASwi16;
182 irqh->swi32 = GBASwi32;
183 irqh->hitIllegal = GBAIllegal;
184 irqh->readCPSR = GBATestIRQ;
185 irqh->hitStub = GBAHitStub;
186}
187
188void GBAReset(struct ARMCore* cpu) {
189 ARMSetPrivilegeMode(cpu, MODE_IRQ);
190 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
191 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
192 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
193 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
194 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
195
196 struct GBA* gba = (struct GBA*) cpu->master;
197 if (!GBARRIsPlaying(gba->rr) && !GBARRIsRecording(gba->rr)) {
198 GBASavedataUnmask(&gba->memory.savedata);
199 }
200 GBAMemoryReset(gba);
201 GBAVideoReset(&gba->video);
202 GBAAudioReset(&gba->audio);
203 GBAIOInit(gba);
204
205 GBASIODeinit(&gba->sio);
206 GBASIOInit(&gba->sio);
207
208 gba->timersEnabled = 0;
209 memset(gba->timers, 0, sizeof(gba->timers));
210}
211
212static void GBAProcessEvents(struct ARMCore* cpu) {
213 do {
214 struct GBA* gba = (struct GBA*) cpu->master;
215 int32_t cycles = cpu->cycles;
216 int32_t nextEvent = INT_MAX;
217 int32_t testEvent;
218
219 gba->bus = cpu->prefetch;
220 if (cpu->executionMode == MODE_THUMB) {
221 gba->bus |= cpu->prefetch << 16;
222 }
223
224 if (gba->springIRQ) {
225 ARMRaiseIRQ(cpu);
226 gba->springIRQ = 0;
227 }
228
229 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
230 if (testEvent < nextEvent) {
231 nextEvent = testEvent;
232 }
233
234 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
235 if (testEvent < nextEvent) {
236 nextEvent = testEvent;
237 }
238
239 testEvent = GBATimersProcessEvents(gba, cycles);
240 if (testEvent < nextEvent) {
241 nextEvent = testEvent;
242 }
243
244 testEvent = GBAMemoryRunDMAs(gba, cycles);
245 if (testEvent < nextEvent) {
246 nextEvent = testEvent;
247 }
248
249 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
250 if (testEvent < nextEvent) {
251 nextEvent = testEvent;
252 }
253
254 cpu->cycles -= cycles;
255 cpu->nextEvent = nextEvent;
256
257 if (cpu->halted) {
258 cpu->cycles = cpu->nextEvent;
259 }
260 } while (cpu->cycles >= cpu->nextEvent);
261}
262
263static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
264 int32_t nextEvent = INT_MAX;
265 if (gba->timersEnabled) {
266 struct GBATimer* timer;
267 struct GBATimer* nextTimer;
268
269 timer = &gba->timers[0];
270 if (timer->enable) {
271 timer->nextEvent -= cycles;
272 timer->lastEvent -= cycles;
273 if (timer->nextEvent <= 0) {
274 timer->lastEvent = timer->nextEvent;
275 timer->nextEvent += timer->overflowInterval;
276 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
277 timer->oldReload = timer->reload;
278
279 if (timer->doIrq) {
280 GBARaiseIRQ(gba, IRQ_TIMER0);
281 }
282
283 if (gba->audio.enable) {
284 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
285 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
286 }
287
288 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
289 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
290 }
291 }
292
293 nextTimer = &gba->timers[1];
294 if (nextTimer->countUp) {
295 ++gba->memory.io[REG_TM1CNT_LO >> 1];
296 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
297 nextTimer->nextEvent = 0;
298 }
299 }
300 }
301 nextEvent = timer->nextEvent;
302 }
303
304 timer = &gba->timers[1];
305 if (timer->enable) {
306 timer->nextEvent -= cycles;
307 timer->lastEvent -= cycles;
308 if (timer->nextEvent <= 0) {
309 timer->lastEvent = timer->nextEvent;
310 timer->nextEvent += timer->overflowInterval;
311 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
312 timer->oldReload = timer->reload;
313
314 if (timer->doIrq) {
315 GBARaiseIRQ(gba, IRQ_TIMER1);
316 }
317
318 if (gba->audio.enable) {
319 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
320 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
321 }
322
323 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
324 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
325 }
326 }
327
328 if (timer->countUp) {
329 timer->nextEvent = INT_MAX;
330 }
331
332 nextTimer = &gba->timers[2];
333 if (nextTimer->countUp) {
334 ++gba->memory.io[REG_TM2CNT_LO >> 1];
335 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
336 nextTimer->nextEvent = 0;
337 }
338 }
339 }
340 if (timer->nextEvent < nextEvent) {
341 nextEvent = timer->nextEvent;
342 }
343 }
344
345 timer = &gba->timers[2];
346 if (timer->enable) {
347 timer->nextEvent -= cycles;
348 timer->lastEvent -= cycles;
349 nextEvent = timer->nextEvent;
350 if (timer->nextEvent <= 0) {
351 timer->lastEvent = timer->nextEvent;
352 timer->nextEvent += timer->overflowInterval;
353 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
354 timer->oldReload = timer->reload;
355
356 if (timer->doIrq) {
357 GBARaiseIRQ(gba, IRQ_TIMER2);
358 }
359
360 if (timer->countUp) {
361 timer->nextEvent = INT_MAX;
362 }
363
364 nextTimer = &gba->timers[3];
365 if (nextTimer->countUp) {
366 ++gba->memory.io[REG_TM3CNT_LO >> 1];
367 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
368 nextTimer->nextEvent = 0;
369 }
370 }
371 }
372 if (timer->nextEvent < nextEvent) {
373 nextEvent = timer->nextEvent;
374 }
375 }
376
377 timer = &gba->timers[3];
378 if (timer->enable) {
379 timer->nextEvent -= cycles;
380 timer->lastEvent -= cycles;
381 nextEvent = timer->nextEvent;
382 if (timer->nextEvent <= 0) {
383 timer->lastEvent = timer->nextEvent;
384 timer->nextEvent += timer->overflowInterval;
385 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
386 timer->oldReload = timer->reload;
387
388 if (timer->doIrq) {
389 GBARaiseIRQ(gba, IRQ_TIMER3);
390 }
391
392 if (timer->countUp) {
393 timer->nextEvent = INT_MAX;
394 }
395 }
396 if (timer->nextEvent < nextEvent) {
397 nextEvent = timer->nextEvent;
398 }
399 }
400 }
401 return nextEvent;
402}
403
404void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
405 gba->debugger = debugger;
406}
407
408void GBADetachDebugger(struct GBA* gba) {
409 gba->debugger = 0;
410}
411
412void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
413 gba->romVf = vf;
414 gba->pristineRomSize = vf->seek(vf, 0, SEEK_END);
415 vf->seek(vf, 0, SEEK_SET);
416 gba->pristineRom = vf->map(vf, SIZE_CART0, MAP_READ);
417 gba->memory.rom = gba->pristineRom;
418 gba->activeFile = fname;
419 gba->memory.romSize = gba->pristineRomSize;
420 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
421 GBASavedataInit(&gba->memory.savedata, sav);
422 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
423 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
424 // TODO: error check
425}
426
427void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
428 gba->biosVf = vf;
429 gba->memory.bios = vf->map(vf, SIZE_BIOS, MAP_READ);
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) {
450 return;
451 }
452 gba->memory.rom = anonymousMemoryMap(patchedSize);
453 memcpy(gba->memory.rom, gba->pristineRom, gba->memory.romSize > patchedSize ? patchedSize : gba->memory.romSize);
454 if (!patch->applyPatch(patch, 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->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 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
467 }
468}
469
470void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
471 gba->timers[timer].reload = reload;
472}
473
474void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
475 struct GBATimer* currentTimer = &gba->timers[timer];
476 GBATimerUpdateRegister(gba, timer);
477
478 int oldPrescale = currentTimer->prescaleBits;
479 switch (control & 0x0003) {
480 case 0x0000:
481 currentTimer->prescaleBits = 0;
482 break;
483 case 0x0001:
484 currentTimer->prescaleBits = 6;
485 break;
486 case 0x0002:
487 currentTimer->prescaleBits = 8;
488 break;
489 case 0x0003:
490 currentTimer->prescaleBits = 10;
491 break;
492 }
493 currentTimer->countUp = !!(control & 0x0004);
494 currentTimer->doIrq = !!(control & 0x0040);
495 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
496 int wasEnabled = currentTimer->enable;
497 currentTimer->enable = !!(control & 0x0080);
498 if (!wasEnabled && currentTimer->enable) {
499 if (!currentTimer->countUp) {
500 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
501 } else {
502 currentTimer->nextEvent = INT_MAX;
503 }
504 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
505 currentTimer->oldReload = currentTimer->reload;
506 currentTimer->lastEvent = 0;
507 gba->timersEnabled |= 1 << timer;
508 } else if (wasEnabled && !currentTimer->enable) {
509 if (!currentTimer->countUp) {
510 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
511 }
512 gba->timersEnabled &= ~(1 << timer);
513 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
514 // FIXME: this might be before present
515 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
516 }
517
518 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
519 gba->cpu->nextEvent = currentTimer->nextEvent;
520 }
521};
522
523void GBAWriteIE(struct GBA* gba, uint16_t value) {
524 if (value & (1 << IRQ_KEYPAD)) {
525 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
526 }
527
528 if (value & (1 << IRQ_GAMEPAK)) {
529 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
530 }
531
532 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
533 ARMRaiseIRQ(gba->cpu);
534 }
535}
536
537void GBAWriteIME(struct GBA* gba, uint16_t value) {
538 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
539 ARMRaiseIRQ(gba->cpu);
540 }
541}
542
543void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
544 gba->memory.io[REG_IF >> 1] |= 1 << irq;
545 gba->cpu->halted = 0;
546
547 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
548 ARMRaiseIRQ(gba->cpu);
549 }
550}
551
552void GBATestIRQ(struct ARMCore* cpu) {
553 struct GBA* gba = (struct GBA*) cpu->master;
554 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
555 gba->springIRQ = 1;
556 gba->cpu->nextEvent = 0;
557 }
558}
559
560void GBAHalt(struct GBA* gba) {
561 gba->cpu->nextEvent = 0;
562 gba->cpu->halted = 1;
563}
564
565static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
566 struct GBAThread* threadContext = GBAThreadGetContext();
567 if (threadContext) {
568 if (!gba) {
569 gba = threadContext->gba;
570 }
571 }
572
573 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
574 return;
575 }
576
577 if (threadContext && threadContext->logHandler) {
578 threadContext->logHandler(threadContext, level, format, args);
579 return;
580 }
581
582 vprintf(format, args);
583 printf("\n");
584
585 if (level == GBA_LOG_FATAL) {
586 abort();
587 }
588}
589
590void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
591 va_list args;
592 va_start(args, format);
593 _GBAVLog(gba, level, format, args);
594 va_end(args);
595}
596
597void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
598 struct GBA* gba = 0;
599 if (debugger->cpu) {
600 gba = (struct GBA*) debugger->cpu->master;
601 }
602
603 enum GBALogLevel gbaLevel;
604 switch (level) {
605 default: // Avoids compiler warning
606 case DEBUGGER_LOG_DEBUG:
607 gbaLevel = GBA_LOG_DEBUG;
608 break;
609 case DEBUGGER_LOG_INFO:
610 gbaLevel = GBA_LOG_INFO;
611 break;
612 case DEBUGGER_LOG_WARN:
613 gbaLevel = GBA_LOG_WARN;
614 break;
615 case DEBUGGER_LOG_ERROR:
616 gbaLevel = GBA_LOG_ERROR;
617 break;
618 }
619 va_list args;
620 va_start(args, format);
621 _GBAVLog(gba, gbaLevel, format, args);
622 va_end(args);
623}
624
625bool GBAIsROM(struct VFile* vf) {
626 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
627 return false;
628 }
629 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
630 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
631 return false;
632 }
633 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
634}
635
636void GBAGetGameCode(struct GBA* gba, char* out) {
637 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->id, 4);
638}
639
640void GBAGetGameTitle(struct GBA* gba, char* out) {
641 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
642}
643
644void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
645 struct GBA* gba = (struct GBA*) cpu->master;
646 enum GBALogLevel level = GBA_LOG_FATAL;
647 if (gba->debugger) {
648 level = GBA_LOG_STUB;
649 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
650 }
651 GBALog(gba, level, "Stub opcode: %08x", opcode);
652}
653
654void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
655 struct GBA* gba = (struct GBA*) cpu->master;
656 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
657 if (gba->debugger) {
658 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
659 }
660}
661
662void _checkOverrides(struct GBA* gba, uint32_t id) {
663 int i;
664 gba->busyLoop = -1;
665 if ((id & 0xFF) == 'F') {
666 GBALog(gba, GBA_LOG_DEBUG, "Found Classic NES Series game, using EEPROM saves");
667 GBASavedataInitEEPROM(&gba->memory.savedata);
668 return;
669 }
670 for (i = 0; _overrides[i].id[0]; ++i) {
671 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
672 if (*overrideId == id) {
673 GBALog(gba, GBA_LOG_DEBUG, "Found override for game %s!", _overrides[i].id);
674 switch (_overrides[i].type) {
675 case SAVEDATA_FLASH512:
676 case SAVEDATA_FLASH1M:
677 gba->memory.savedata.type = _overrides[i].type;
678 GBASavedataInitFlash(&gba->memory.savedata);
679 break;
680 case SAVEDATA_EEPROM:
681 GBASavedataInitEEPROM(&gba->memory.savedata);
682 break;
683 case SAVEDATA_SRAM:
684 GBASavedataInitSRAM(&gba->memory.savedata);
685 break;
686 case SAVEDATA_NONE:
687 break;
688 }
689
690 if (_overrides[i].gpio & GPIO_RTC) {
691 GBAGPIOInitRTC(&gba->memory.gpio);
692 }
693
694 if (_overrides[i].gpio & GPIO_GYRO) {
695 GBAGPIOInitGyro(&gba->memory.gpio);
696 }
697
698 if (_overrides[i].gpio & GPIO_RUMBLE) {
699 GBAGPIOInitRumble(&gba->memory.gpio);
700 }
701
702 gba->busyLoop = _overrides[i].busyLoop;
703 return;
704 }
705 }
706}