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 Mystery Dungeon
80 { "B24J", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
81 { "B24E", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
82 { "B24P", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
83 { "B24U", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
84
85 // Pokemon FireRed
86 { "BPRJ", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
87 { "BPRE", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
88 { "BPRP", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
89
90 // Pokemon LeafGreen
91 { "BPGJ", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
92 { "BPGE", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
93 { "BPGP", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
94
95 // RockMan EXE 4.5 - Real Operation
96 { "BR4J", SAVEDATA_FLASH512, GPIO_RTC, -1 },
97
98 // Super Mario Advance 4
99 { "AX4J", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
100 { "AX4E", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
101 { "AX4P", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
102
103 // Wario Ware Twisted
104 { "RZWJ", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
105 { "RZWE", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
106 { "RZWP", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
107
108 { { 0, 0, 0, 0 }, 0, 0, -1 }
109};
110
111static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
112static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
113static void GBAProcessEvents(struct ARMCore* cpu);
114static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
115static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
116static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
117
118static void _checkOverrides(struct GBA* gba, uint32_t code);
119
120void GBACreate(struct GBA* gba) {
121 gba->d.id = GBA_COMPONENT_MAGIC;
122 gba->d.init = GBAInit;
123 gba->d.deinit = 0;
124}
125
126static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
127 struct GBA* gba = (struct GBA*) component;
128 gba->cpu = cpu;
129 gba->debugger = 0;
130
131 GBAInterruptHandlerInit(&cpu->irqh);
132 GBAMemoryInit(gba);
133 GBASavedataInit(&gba->memory.savedata, 0);
134
135 gba->video.p = gba;
136 GBAVideoInit(&gba->video);
137
138 gba->audio.p = gba;
139 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
140
141 GBAIOInit(gba);
142
143 gba->sio.p = gba;
144 GBASIOInit(&gba->sio);
145
146 gba->timersEnabled = 0;
147 memset(gba->timers, 0, sizeof(gba->timers));
148
149 gba->springIRQ = 0;
150 gba->keySource = 0;
151 gba->rotationSource = 0;
152 gba->rumble = 0;
153 gba->rr = 0;
154
155 gba->romVf = 0;
156 gba->biosVf = 0;
157
158 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
159
160 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
161
162 gba->busyLoop = -1;
163}
164
165void GBADestroy(struct GBA* gba) {
166 if (gba->pristineRom == gba->memory.rom) {
167 gba->memory.rom = 0;
168 }
169
170 if (gba->romVf) {
171 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
172 }
173
174 if (gba->biosVf) {
175 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
176 }
177
178 GBAMemoryDeinit(gba);
179 GBAVideoDeinit(&gba->video);
180 GBAAudioDeinit(&gba->audio);
181 GBARRContextDestroy(gba);
182}
183
184void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
185 irqh->reset = GBAReset;
186 irqh->processEvents = GBAProcessEvents;
187 irqh->swi16 = GBASwi16;
188 irqh->swi32 = GBASwi32;
189 irqh->hitIllegal = GBAIllegal;
190 irqh->readCPSR = GBATestIRQ;
191 irqh->hitStub = GBAHitStub;
192}
193
194void GBAReset(struct ARMCore* cpu) {
195 ARMSetPrivilegeMode(cpu, MODE_IRQ);
196 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
197 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
198 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
199 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
200 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
201
202 struct GBA* gba = (struct GBA*) cpu->master;
203 if (!GBARRIsPlaying(gba->rr) && !GBARRIsRecording(gba->rr)) {
204 GBASavedataUnmask(&gba->memory.savedata);
205 }
206 GBAMemoryReset(gba);
207 GBAVideoReset(&gba->video);
208 GBAAudioReset(&gba->audio);
209 GBAIOInit(gba);
210
211 GBASIODeinit(&gba->sio);
212 GBASIOInit(&gba->sio);
213
214 gba->timersEnabled = 0;
215 memset(gba->timers, 0, sizeof(gba->timers));
216}
217
218static void GBAProcessEvents(struct ARMCore* cpu) {
219 do {
220 struct GBA* gba = (struct GBA*) cpu->master;
221 int32_t cycles = cpu->cycles;
222 int32_t nextEvent = INT_MAX;
223 int32_t testEvent;
224
225 gba->bus = cpu->prefetch;
226 if (cpu->executionMode == MODE_THUMB) {
227 gba->bus |= cpu->prefetch << 16;
228 }
229
230 if (gba->springIRQ) {
231 ARMRaiseIRQ(cpu);
232 gba->springIRQ = 0;
233 }
234
235 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
236 if (testEvent < nextEvent) {
237 nextEvent = testEvent;
238 }
239
240 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
241 if (testEvent < nextEvent) {
242 nextEvent = testEvent;
243 }
244
245 testEvent = GBATimersProcessEvents(gba, cycles);
246 if (testEvent < nextEvent) {
247 nextEvent = testEvent;
248 }
249
250 testEvent = GBAMemoryRunDMAs(gba, cycles);
251 if (testEvent < nextEvent) {
252 nextEvent = testEvent;
253 }
254
255 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
256 if (testEvent < nextEvent) {
257 nextEvent = testEvent;
258 }
259
260 cpu->cycles -= cycles;
261 cpu->nextEvent = nextEvent;
262
263 if (cpu->halted) {
264 cpu->cycles = cpu->nextEvent;
265 }
266 } while (cpu->cycles >= cpu->nextEvent);
267}
268
269static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
270 int32_t nextEvent = INT_MAX;
271 if (gba->timersEnabled) {
272 struct GBATimer* timer;
273 struct GBATimer* nextTimer;
274
275 timer = &gba->timers[0];
276 if (timer->enable) {
277 timer->nextEvent -= cycles;
278 timer->lastEvent -= cycles;
279 if (timer->nextEvent <= 0) {
280 timer->lastEvent = timer->nextEvent;
281 timer->nextEvent += timer->overflowInterval;
282 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
283 timer->oldReload = timer->reload;
284
285 if (timer->doIrq) {
286 GBARaiseIRQ(gba, IRQ_TIMER0);
287 }
288
289 if (gba->audio.enable) {
290 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
291 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
292 }
293
294 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
295 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
296 }
297 }
298
299 nextTimer = &gba->timers[1];
300 if (nextTimer->countUp) {
301 ++gba->memory.io[REG_TM1CNT_LO >> 1];
302 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
303 nextTimer->nextEvent = 0;
304 }
305 }
306 }
307 nextEvent = timer->nextEvent;
308 }
309
310 timer = &gba->timers[1];
311 if (timer->enable) {
312 timer->nextEvent -= cycles;
313 timer->lastEvent -= cycles;
314 if (timer->nextEvent <= 0) {
315 timer->lastEvent = timer->nextEvent;
316 timer->nextEvent += timer->overflowInterval;
317 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
318 timer->oldReload = timer->reload;
319
320 if (timer->doIrq) {
321 GBARaiseIRQ(gba, IRQ_TIMER1);
322 }
323
324 if (gba->audio.enable) {
325 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
326 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
327 }
328
329 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
330 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
331 }
332 }
333
334 if (timer->countUp) {
335 timer->nextEvent = INT_MAX;
336 }
337
338 nextTimer = &gba->timers[2];
339 if (nextTimer->countUp) {
340 ++gba->memory.io[REG_TM2CNT_LO >> 1];
341 if (!gba->memory.io[REG_TM2CNT_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[2];
352 if (timer->enable) {
353 timer->nextEvent -= cycles;
354 timer->lastEvent -= cycles;
355 nextEvent = timer->nextEvent;
356 if (timer->nextEvent <= 0) {
357 timer->lastEvent = timer->nextEvent;
358 timer->nextEvent += timer->overflowInterval;
359 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
360 timer->oldReload = timer->reload;
361
362 if (timer->doIrq) {
363 GBARaiseIRQ(gba, IRQ_TIMER2);
364 }
365
366 if (timer->countUp) {
367 timer->nextEvent = INT_MAX;
368 }
369
370 nextTimer = &gba->timers[3];
371 if (nextTimer->countUp) {
372 ++gba->memory.io[REG_TM3CNT_LO >> 1];
373 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
374 nextTimer->nextEvent = 0;
375 }
376 }
377 }
378 if (timer->nextEvent < nextEvent) {
379 nextEvent = timer->nextEvent;
380 }
381 }
382
383 timer = &gba->timers[3];
384 if (timer->enable) {
385 timer->nextEvent -= cycles;
386 timer->lastEvent -= cycles;
387 nextEvent = timer->nextEvent;
388 if (timer->nextEvent <= 0) {
389 timer->lastEvent = timer->nextEvent;
390 timer->nextEvent += timer->overflowInterval;
391 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
392 timer->oldReload = timer->reload;
393
394 if (timer->doIrq) {
395 GBARaiseIRQ(gba, IRQ_TIMER3);
396 }
397
398 if (timer->countUp) {
399 timer->nextEvent = INT_MAX;
400 }
401 }
402 if (timer->nextEvent < nextEvent) {
403 nextEvent = timer->nextEvent;
404 }
405 }
406 }
407 return nextEvent;
408}
409
410void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
411 gba->debugger = debugger;
412}
413
414void GBADetachDebugger(struct GBA* gba) {
415 gba->debugger = 0;
416}
417
418void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
419 gba->romVf = vf;
420 gba->pristineRomSize = vf->seek(vf, 0, SEEK_END);
421 vf->seek(vf, 0, SEEK_SET);
422 gba->pristineRom = vf->map(vf, SIZE_CART0, MAP_READ);
423 gba->memory.rom = gba->pristineRom;
424 gba->activeFile = fname;
425 gba->memory.romSize = gba->pristineRomSize;
426 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
427 GBASavedataInit(&gba->memory.savedata, sav);
428 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
429 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
430 // TODO: error check
431}
432
433void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
434 gba->biosVf = vf;
435 gba->memory.bios = vf->map(vf, SIZE_BIOS, MAP_READ);
436 gba->memory.fullBios = 1;
437 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
438 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
439 if (checksum == GBA_BIOS_CHECKSUM) {
440 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
441 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
442 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
443 } else {
444 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
445 }
446 gba->biosChecksum = checksum;
447 if (gba->memory.activeRegion == REGION_BIOS) {
448 gba->cpu->memory.activeRegion = gba->memory.bios;
449 }
450 // TODO: error check
451}
452
453void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
454 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
455 if (!patchedSize) {
456 return;
457 }
458 gba->memory.rom = anonymousMemoryMap(patchedSize);
459 memcpy(gba->memory.rom, gba->pristineRom, gba->memory.romSize > patchedSize ? patchedSize : gba->memory.romSize);
460 if (!patch->applyPatch(patch, gba->memory.rom, patchedSize)) {
461 mappedMemoryFree(gba->memory.rom, patchedSize);
462 gba->memory.rom = gba->pristineRom;
463 return;
464 }
465 gba->memory.romSize = patchedSize;
466 gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
467}
468
469void GBATimerUpdateRegister(struct GBA* gba, int timer) {
470 struct GBATimer* currentTimer = &gba->timers[timer];
471 if (currentTimer->enable && !currentTimer->countUp) {
472 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
473 }
474}
475
476void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
477 gba->timers[timer].reload = reload;
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 = 0;
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 (value & (1 << IRQ_GAMEPAK)) {
535 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
536 }
537
538 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
539 ARMRaiseIRQ(gba->cpu);
540 }
541}
542
543void GBAWriteIME(struct GBA* gba, uint16_t value) {
544 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
545 ARMRaiseIRQ(gba->cpu);
546 }
547}
548
549void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
550 gba->memory.io[REG_IF >> 1] |= 1 << irq;
551 gba->cpu->halted = 0;
552
553 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
554 ARMRaiseIRQ(gba->cpu);
555 }
556}
557
558void GBATestIRQ(struct ARMCore* cpu) {
559 struct GBA* gba = (struct GBA*) cpu->master;
560 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
561 gba->springIRQ = 1;
562 gba->cpu->nextEvent = 0;
563 }
564}
565
566void GBAHalt(struct GBA* gba) {
567 gba->cpu->nextEvent = 0;
568 gba->cpu->halted = 1;
569}
570
571static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
572 struct GBAThread* threadContext = GBAThreadGetContext();
573 if (threadContext) {
574 if (!gba) {
575 gba = threadContext->gba;
576 }
577 }
578
579 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
580 return;
581 }
582
583 if (threadContext && threadContext->logHandler) {
584 threadContext->logHandler(threadContext, level, format, args);
585 return;
586 }
587
588 vprintf(format, args);
589 printf("\n");
590
591 if (level == GBA_LOG_FATAL) {
592 abort();
593 }
594}
595
596void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
597 va_list args;
598 va_start(args, format);
599 _GBAVLog(gba, level, format, args);
600 va_end(args);
601}
602
603void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
604 struct GBA* gba = 0;
605 if (debugger->cpu) {
606 gba = (struct GBA*) debugger->cpu->master;
607 }
608
609 enum GBALogLevel gbaLevel;
610 switch (level) {
611 default: // Avoids compiler warning
612 case DEBUGGER_LOG_DEBUG:
613 gbaLevel = GBA_LOG_DEBUG;
614 break;
615 case DEBUGGER_LOG_INFO:
616 gbaLevel = GBA_LOG_INFO;
617 break;
618 case DEBUGGER_LOG_WARN:
619 gbaLevel = GBA_LOG_WARN;
620 break;
621 case DEBUGGER_LOG_ERROR:
622 gbaLevel = GBA_LOG_ERROR;
623 break;
624 }
625 va_list args;
626 va_start(args, format);
627 _GBAVLog(gba, gbaLevel, format, args);
628 va_end(args);
629}
630
631bool GBAIsROM(struct VFile* vf) {
632 if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
633 return false;
634 }
635 uint8_t signature[sizeof(GBA_ROM_MAGIC)];
636 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
637 return false;
638 }
639 return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
640}
641
642void GBAGetGameCode(struct GBA* gba, char* out) {
643 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->id, 4);
644}
645
646void GBAGetGameTitle(struct GBA* gba, char* out) {
647 memcpy(out, &((struct GBACartridge*) gba->memory.rom)->title, 12);
648}
649
650void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
651 struct GBA* gba = (struct GBA*) cpu->master;
652 enum GBALogLevel level = GBA_LOG_FATAL;
653 if (gba->debugger) {
654 level = GBA_LOG_STUB;
655 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
656 }
657 GBALog(gba, level, "Stub opcode: %08x", opcode);
658}
659
660void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
661 struct GBA* gba = (struct GBA*) cpu->master;
662 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
663 if (gba->debugger) {
664 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
665 }
666}
667
668void _checkOverrides(struct GBA* gba, uint32_t id) {
669 int i;
670 gba->busyLoop = -1;
671 if ((id & 0xFF) == 'F') {
672 GBALog(gba, GBA_LOG_DEBUG, "Found Classic NES Series game, using EEPROM saves");
673 GBASavedataInitEEPROM(&gba->memory.savedata);
674 return;
675 }
676 for (i = 0; _overrides[i].id[0]; ++i) {
677 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
678 if (*overrideId == id) {
679 GBALog(gba, GBA_LOG_DEBUG, "Found override for game %s!", _overrides[i].id);
680 switch (_overrides[i].type) {
681 case SAVEDATA_FLASH512:
682 case SAVEDATA_FLASH1M:
683 gba->memory.savedata.type = _overrides[i].type;
684 GBASavedataInitFlash(&gba->memory.savedata);
685 break;
686 case SAVEDATA_EEPROM:
687 GBASavedataInitEEPROM(&gba->memory.savedata);
688 break;
689 case SAVEDATA_SRAM:
690 GBASavedataInitSRAM(&gba->memory.savedata);
691 break;
692 case SAVEDATA_NONE:
693 break;
694 }
695
696 if (_overrides[i].gpio & GPIO_RTC) {
697 GBAGPIOInitRTC(&gba->memory.gpio);
698 }
699
700 if (_overrides[i].gpio & GPIO_GYRO) {
701 GBAGPIOInitGyro(&gba->memory.gpio);
702 }
703
704 if (_overrides[i].gpio & GPIO_RUMBLE) {
705 GBAGPIOInitRumble(&gba->memory.gpio);
706 }
707
708 gba->busyLoop = _overrides[i].busyLoop;
709 return;
710 }
711 }
712}