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 = 4;
18static const uint8_t GBA_ROM_MAGIC[] = { 0x24, 0xFF, 0xAE, 0x51, 0x69, 0x9A, 0xA2, 0x21 };
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
128 gba->video.p = gba;
129 GBAVideoInit(&gba->video);
130
131 gba->audio.p = gba;
132 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
133
134 GBAIOInit(gba);
135
136 gba->sio.p = gba;
137 GBASIOInit(&gba->sio);
138
139 gba->timersEnabled = 0;
140 memset(gba->timers, 0, sizeof(gba->timers));
141
142 gba->springIRQ = 0;
143 gba->keySource = 0;
144 gba->rotationSource = 0;
145 gba->rumble = 0;
146 gba->rr = 0;
147
148 gba->romVf = 0;
149 gba->biosVf = 0;
150
151 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
152
153 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
154}
155
156void GBADestroy(struct GBA* gba) {
157 if (gba->pristineRom == gba->memory.rom) {
158 gba->memory.rom = 0;
159 }
160
161 if (gba->romVf) {
162 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
163 }
164
165 if (gba->biosVf) {
166 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
167 }
168
169 GBAMemoryDeinit(gba);
170 GBAVideoDeinit(&gba->video);
171 GBAAudioDeinit(&gba->audio);
172 GBARRContextDestroy(gba);
173}
174
175void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
176 irqh->reset = GBAReset;
177 irqh->processEvents = GBAProcessEvents;
178 irqh->swi16 = GBASwi16;
179 irqh->swi32 = GBASwi32;
180 irqh->hitIllegal = GBAIllegal;
181 irqh->readCPSR = GBATestIRQ;
182 irqh->hitStub = GBAHitStub;
183}
184
185void GBAReset(struct ARMCore* cpu) {
186 ARMSetPrivilegeMode(cpu, MODE_IRQ);
187 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
188 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
189 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
190 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
191 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
192
193 struct GBA* gba = (struct GBA*) cpu->master;
194 if (!GBARRIsPlaying(gba->rr) && !GBARRIsRecording(gba->rr)) {
195 GBASavedataUnmask(&gba->memory.savedata);
196 }
197 GBAMemoryReset(gba);
198 GBAVideoReset(&gba->video);
199 GBAAudioReset(&gba->audio);
200 GBAIOInit(gba);
201}
202
203static void GBAProcessEvents(struct ARMCore* cpu) {
204 do {
205 struct GBA* gba = (struct GBA*) cpu->master;
206 int32_t cycles = cpu->cycles;
207 int32_t nextEvent = INT_MAX;
208 int32_t testEvent;
209
210 if (gba->springIRQ) {
211 ARMRaiseIRQ(cpu);
212 gba->springIRQ = 0;
213 }
214
215 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
216 if (testEvent < nextEvent) {
217 nextEvent = testEvent;
218 }
219
220 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
221 if (testEvent < nextEvent) {
222 nextEvent = testEvent;
223 }
224
225 testEvent = GBATimersProcessEvents(gba, cycles);
226 if (testEvent < nextEvent) {
227 nextEvent = testEvent;
228 }
229
230 testEvent = GBAMemoryRunDMAs(gba, cycles);
231 if (testEvent < nextEvent) {
232 nextEvent = testEvent;
233 }
234
235 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
236 if (testEvent < nextEvent) {
237 nextEvent = testEvent;
238 }
239
240 cpu->cycles -= cycles;
241 cpu->nextEvent = nextEvent;
242
243 if (cpu->halted) {
244 cpu->cycles = cpu->nextEvent;
245 }
246 } while (cpu->cycles >= cpu->nextEvent);
247}
248
249static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
250 int32_t nextEvent = INT_MAX;
251 if (gba->timersEnabled) {
252 struct GBATimer* timer;
253 struct GBATimer* nextTimer;
254
255 timer = &gba->timers[0];
256 if (timer->enable) {
257 timer->nextEvent -= cycles;
258 timer->lastEvent -= cycles;
259 if (timer->nextEvent <= 0) {
260 timer->lastEvent = timer->nextEvent;
261 timer->nextEvent += timer->overflowInterval;
262 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
263 timer->oldReload = timer->reload;
264
265 if (timer->doIrq) {
266 GBARaiseIRQ(gba, IRQ_TIMER0);
267 }
268
269 if (gba->audio.enable) {
270 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
271 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
272 }
273
274 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
275 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
276 }
277 }
278
279 nextTimer = &gba->timers[1];
280 if (nextTimer->countUp) {
281 ++gba->memory.io[REG_TM1CNT_LO >> 1];
282 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
283 nextTimer->nextEvent = 0;
284 }
285 }
286 }
287 nextEvent = timer->nextEvent;
288 }
289
290 timer = &gba->timers[1];
291 if (timer->enable) {
292 timer->nextEvent -= cycles;
293 timer->lastEvent -= cycles;
294 if (timer->nextEvent <= 0) {
295 timer->lastEvent = timer->nextEvent;
296 timer->nextEvent += timer->overflowInterval;
297 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
298 timer->oldReload = timer->reload;
299
300 if (timer->doIrq) {
301 GBARaiseIRQ(gba, IRQ_TIMER1);
302 }
303
304 if (gba->audio.enable) {
305 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
306 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
307 }
308
309 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
310 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
311 }
312 }
313
314 if (timer->countUp) {
315 timer->nextEvent = INT_MAX;
316 }
317
318 nextTimer = &gba->timers[2];
319 if (nextTimer->countUp) {
320 ++gba->memory.io[REG_TM2CNT_LO >> 1];
321 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
322 nextTimer->nextEvent = 0;
323 }
324 }
325 }
326 if (timer->nextEvent < nextEvent) {
327 nextEvent = timer->nextEvent;
328 }
329 }
330
331 timer = &gba->timers[2];
332 if (timer->enable) {
333 timer->nextEvent -= cycles;
334 timer->lastEvent -= cycles;
335 nextEvent = timer->nextEvent;
336 if (timer->nextEvent <= 0) {
337 timer->lastEvent = timer->nextEvent;
338 timer->nextEvent += timer->overflowInterval;
339 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
340 timer->oldReload = timer->reload;
341
342 if (timer->doIrq) {
343 GBARaiseIRQ(gba, IRQ_TIMER2);
344 }
345
346 if (timer->countUp) {
347 timer->nextEvent = INT_MAX;
348 }
349
350 nextTimer = &gba->timers[3];
351 if (nextTimer->countUp) {
352 ++gba->memory.io[REG_TM3CNT_LO >> 1];
353 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
354 nextTimer->nextEvent = 0;
355 }
356 }
357 }
358 if (timer->nextEvent < nextEvent) {
359 nextEvent = timer->nextEvent;
360 }
361 }
362
363 timer = &gba->timers[3];
364 if (timer->enable) {
365 timer->nextEvent -= cycles;
366 timer->lastEvent -= cycles;
367 nextEvent = timer->nextEvent;
368 if (timer->nextEvent <= 0) {
369 timer->lastEvent = timer->nextEvent;
370 timer->nextEvent += timer->overflowInterval;
371 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
372 timer->oldReload = timer->reload;
373
374 if (timer->doIrq) {
375 GBARaiseIRQ(gba, IRQ_TIMER3);
376 }
377
378 if (timer->countUp) {
379 timer->nextEvent = INT_MAX;
380 }
381 }
382 if (timer->nextEvent < nextEvent) {
383 nextEvent = timer->nextEvent;
384 }
385 }
386 }
387 return nextEvent;
388}
389
390void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
391 gba->debugger = debugger;
392}
393
394void GBADetachDebugger(struct GBA* gba) {
395 gba->debugger = 0;
396}
397
398void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
399 gba->romVf = vf;
400 gba->pristineRomSize = vf->seek(vf, 0, SEEK_END);
401 vf->seek(vf, 0, SEEK_SET);
402 gba->pristineRom = vf->map(vf, SIZE_CART0, MAP_READ);
403 gba->memory.rom = gba->pristineRom;
404 gba->activeFile = fname;
405 gba->memory.romSize = gba->pristineRomSize;
406 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
407 GBASavedataInit(&gba->memory.savedata, sav);
408 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
409 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
410 // TODO: error check
411}
412
413void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
414 gba->biosVf = vf;
415 gba->memory.bios = vf->map(vf, SIZE_BIOS, MAP_READ);
416 gba->memory.fullBios = 1;
417 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
418 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
419 if (checksum == GBA_BIOS_CHECKSUM) {
420 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
421 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
422 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
423 } else {
424 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
425 }
426 gba->biosChecksum = checksum;
427 if ((gba->cpu->gprs[ARM_PC] >> BASE_OFFSET) == BASE_BIOS) {
428 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
429 }
430 // TODO: error check
431}
432
433void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
434 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
435 if (!patchedSize) {
436 return;
437 }
438 gba->memory.rom = anonymousMemoryMap(patchedSize);
439 memcpy(gba->memory.rom, gba->pristineRom, gba->memory.romSize > patchedSize ? patchedSize : gba->memory.romSize);
440 if (!patch->applyPatch(patch, gba->memory.rom, patchedSize)) {
441 mappedMemoryFree(gba->memory.rom, patchedSize);
442 gba->memory.rom = gba->pristineRom;
443 return;
444 }
445 gba->memory.romSize = patchedSize;
446 gba->romCrc32 = crc32(gba->memory.rom, gba->memory.romSize);
447}
448
449void GBATimerUpdateRegister(struct GBA* gba, int timer) {
450 struct GBATimer* currentTimer = &gba->timers[timer];
451 if (currentTimer->enable && !currentTimer->countUp) {
452 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
453 }
454}
455
456void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
457 gba->timers[timer].reload = reload;
458}
459
460void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
461 struct GBATimer* currentTimer = &gba->timers[timer];
462 GBATimerUpdateRegister(gba, timer);
463
464 int oldPrescale = currentTimer->prescaleBits;
465 switch (control & 0x0003) {
466 case 0x0000:
467 currentTimer->prescaleBits = 0;
468 break;
469 case 0x0001:
470 currentTimer->prescaleBits = 6;
471 break;
472 case 0x0002:
473 currentTimer->prescaleBits = 8;
474 break;
475 case 0x0003:
476 currentTimer->prescaleBits = 10;
477 break;
478 }
479 currentTimer->countUp = !!(control & 0x0004);
480 currentTimer->doIrq = !!(control & 0x0040);
481 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
482 int wasEnabled = currentTimer->enable;
483 currentTimer->enable = !!(control & 0x0080);
484 if (!wasEnabled && currentTimer->enable) {
485 if (!currentTimer->countUp) {
486 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
487 } else {
488 currentTimer->nextEvent = INT_MAX;
489 }
490 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
491 currentTimer->oldReload = currentTimer->reload;
492 currentTimer->lastEvent = 0;
493 gba->timersEnabled |= 1 << timer;
494 } else if (wasEnabled && !currentTimer->enable) {
495 if (!currentTimer->countUp) {
496 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
497 }
498 gba->timersEnabled &= ~(1 << timer);
499 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
500 // FIXME: this might be before present
501 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
502 }
503
504 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
505 gba->cpu->nextEvent = currentTimer->nextEvent;
506 }
507};
508
509void GBAWriteIE(struct GBA* gba, uint16_t value) {
510 if (value & (1 << IRQ_KEYPAD)) {
511 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
512 }
513
514 if (value & (1 << IRQ_GAMEPAK)) {
515 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
516 }
517
518 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
519 ARMRaiseIRQ(gba->cpu);
520 }
521}
522
523void GBAWriteIME(struct GBA* gba, uint16_t value) {
524 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
525 ARMRaiseIRQ(gba->cpu);
526 }
527}
528
529void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
530 gba->memory.io[REG_IF >> 1] |= 1 << irq;
531 gba->cpu->halted = 0;
532
533 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
534 ARMRaiseIRQ(gba->cpu);
535 }
536}
537
538void GBATestIRQ(struct ARMCore* cpu) {
539 struct GBA* gba = (struct GBA*) cpu->master;
540 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
541 gba->springIRQ = 1;
542 gba->cpu->nextEvent = 0;
543 }
544}
545
546void GBAHalt(struct GBA* gba) {
547 gba->cpu->nextEvent = 0;
548 gba->cpu->halted = 1;
549}
550
551static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
552 struct GBAThread* threadContext = GBAThreadGetContext();
553 if (threadContext) {
554 if (!gba) {
555 gba = threadContext->gba;
556 }
557 }
558
559 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
560 return;
561 }
562
563 if (threadContext && threadContext->logHandler) {
564 threadContext->logHandler(threadContext, level, format, args);
565 return;
566 }
567
568 vprintf(format, args);
569 printf("\n");
570
571 if (level == GBA_LOG_FATAL) {
572 abort();
573 }
574}
575
576void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
577 va_list args;
578 va_start(args, format);
579 _GBAVLog(gba, level, format, args);
580 va_end(args);
581}
582
583void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
584 struct GBA* gba = 0;
585 if (debugger->cpu) {
586 gba = (struct GBA*) debugger->cpu->master;
587 }
588
589 enum GBALogLevel gbaLevel;
590 switch (level) {
591 default: // Avoids compiler warning
592 case DEBUGGER_LOG_DEBUG:
593 gbaLevel = GBA_LOG_DEBUG;
594 break;
595 case DEBUGGER_LOG_INFO:
596 gbaLevel = GBA_LOG_INFO;
597 break;
598 case DEBUGGER_LOG_WARN:
599 gbaLevel = GBA_LOG_WARN;
600 break;
601 case DEBUGGER_LOG_ERROR:
602 gbaLevel = GBA_LOG_ERROR;
603 break;
604 }
605 va_list args;
606 va_start(args, format);
607 _GBAVLog(gba, gbaLevel, format, args);
608 va_end(args);
609}
610
611bool GBAIsROM(struct VFile* vf) {
612 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
613 return false;
614 }
615 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
616 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
617 return false;
618 }
619 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
620}
621
622void GBAGetGameCode(struct GBA* gba, char* out) {
623 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->id, 4);
624}
625
626void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
627 struct GBA* gba = (struct GBA*) cpu->master;
628 enum GBALogLevel level = GBA_LOG_FATAL;
629 if (gba->debugger) {
630 level = GBA_LOG_STUB;
631 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
632 }
633 GBALog(gba, level, "Stub opcode: %08x", opcode);
634}
635
636void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
637 struct GBA* gba = (struct GBA*) cpu->master;
638 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
639 if (gba->debugger) {
640 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
641 }
642}
643
644void _checkOverrides(struct GBA* gba, uint32_t id) {
645 int i;
646 gba->busyLoop = -1;
647 for (i = 0; _overrides[i].id[0]; ++i) {
648 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
649 if (*overrideId == id) {
650 switch (_overrides[i].type) {
651 case SAVEDATA_FLASH512:
652 case SAVEDATA_FLASH1M:
653 gba->memory.savedata.type = _overrides[i].type;
654 GBASavedataInitFlash(&gba->memory.savedata);
655 break;
656 case SAVEDATA_EEPROM:
657 GBASavedataInitEEPROM(&gba->memory.savedata);
658 break;
659 case SAVEDATA_SRAM:
660 GBASavedataInitSRAM(&gba->memory.savedata);
661 break;
662 case SAVEDATA_NONE:
663 break;
664 }
665
666 if (_overrides[i].gpio & GPIO_RTC) {
667 GBAGPIOInitRTC(&gba->memory.gpio);
668 }
669
670 if (_overrides[i].gpio & GPIO_GYRO) {
671 GBAGPIOInitGyro(&gba->memory.gpio);
672 }
673
674 if (_overrides[i].gpio & GPIO_RUMBLE) {
675 GBAGPIOInitRumble(&gba->memory.gpio);
676 }
677
678 gba->busyLoop = _overrides[i].busyLoop;
679 return;
680 }
681 }
682}