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 uint64_t GBA_ROM_MAGIC = 0x21A29A6951AEFF24;
18
19enum {
20 SP_BASE_SYSTEM = 0x03FFFF00,
21 SP_BASE_IRQ = 0x03FFFFA0,
22 SP_BASE_SUPERVISOR = 0x03FFFFE0
23};
24
25struct GBACartridgeOverride {
26 const char id[4];
27 enum SavedataType type;
28 int gpio;
29 uint32_t busyLoop;
30};
31
32static const struct GBACartridgeOverride _overrides[] = {
33 // Boktai: The Sun is in Your Hand
34 { "U3IE", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
35 { "U3IP", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
36
37 // Boktai 2: Solar Boy Django
38 { "U32E", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
39 { "U32P", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR, -1 },
40
41 // Drill Dozer
42 { "V49J", SAVEDATA_SRAM, GPIO_RUMBLE, -1 },
43 { "V49E", SAVEDATA_SRAM, GPIO_RUMBLE, -1 },
44
45 // Mega Man Battle Network
46 { "AREE", SAVEDATA_SRAM, GPIO_NONE, 0x8000338 },
47
48 // Pokemon Ruby
49 { "AXVJ", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
50 { "AXVE", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
51 { "AXVP", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
52 { "AXVI", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
53 { "AXVS", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
54 { "AXVD", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
55 { "AXVF", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
56
57 // Pokemon Sapphire
58 { "AXPJ", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
59 { "AXPE", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
60 { "AXPP", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
61 { "AXPI", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
62 { "AXPS", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
63 { "AXPD", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
64 { "AXPF", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
65
66 // Pokemon Emerald
67 { "BPEJ", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
68 { "BPEE", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
69 { "BPEP", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
70 { "BPEI", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
71 { "BPES", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
72 { "BPED", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
73 { "BPEF", SAVEDATA_FLASH1M, GPIO_RTC, -1 },
74
75 // Pokemon FireRed
76 { "BPRJ", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
77 { "BPRE", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
78 { "BPRP", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
79
80 // Pokemon LeafGreen
81 { "BPGJ", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
82 { "BPGE", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
83 { "BPGP", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
84
85 // RockMan EXE 4.5 - Real Operation
86 { "BR4J", SAVEDATA_FLASH512, GPIO_RTC, -1 },
87
88 // Super Mario Advance 4
89 { "AX4J", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
90 { "AX4E", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
91 { "AX4P", SAVEDATA_FLASH1M, GPIO_NONE, -1 },
92
93 // Wario Ware Twisted
94 { "RZWJ", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
95 { "RZWE", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
96 { "RZWP", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO, -1 },
97
98 { { 0, 0, 0, 0 }, 0, 0, -1 }
99};
100
101static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
102static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
103static void GBAProcessEvents(struct ARMCore* cpu);
104static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
105static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
106static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
107
108static void _checkOverrides(struct GBA* gba, uint32_t code);
109
110void GBACreate(struct GBA* gba) {
111 gba->d.id = GBA_COMPONENT_MAGIC;
112 gba->d.init = GBAInit;
113 gba->d.deinit = 0;
114}
115
116static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
117 struct GBA* gba = (struct GBA*) component;
118 gba->cpu = cpu;
119 gba->debugger = 0;
120
121 GBAInterruptHandlerInit(&cpu->irqh);
122 GBAMemoryInit(gba);
123
124 gba->video.p = gba;
125 GBAVideoInit(&gba->video);
126
127 gba->audio.p = gba;
128 GBAAudioInit(&gba->audio, GBA_AUDIO_SAMPLES);
129
130 GBAIOInit(gba);
131
132 gba->sio.p = gba;
133 GBASIOInit(&gba->sio);
134
135 gba->timersEnabled = 0;
136 memset(gba->timers, 0, sizeof(gba->timers));
137
138 gba->springIRQ = 0;
139 gba->keySource = 0;
140 gba->rotationSource = 0;
141 gba->rumble = 0;
142 gba->rr = 0;
143
144 gba->romVf = 0;
145 gba->biosVf = 0;
146
147 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
148
149 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
150}
151
152void GBADestroy(struct GBA* gba) {
153 if (gba->pristineRom == gba->memory.rom) {
154 gba->memory.rom = 0;
155 }
156
157 if (gba->romVf) {
158 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
159 }
160
161 if (gba->biosVf) {
162 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
163 }
164
165 GBAMemoryDeinit(gba);
166 GBAVideoDeinit(&gba->video);
167 GBAAudioDeinit(&gba->audio);
168 GBARRContextDestroy(gba);
169}
170
171void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
172 irqh->reset = GBAReset;
173 irqh->processEvents = GBAProcessEvents;
174 irqh->swi16 = GBASwi16;
175 irqh->swi32 = GBASwi32;
176 irqh->hitIllegal = GBAIllegal;
177 irqh->readCPSR = GBATestIRQ;
178 irqh->hitStub = GBAHitStub;
179}
180
181void GBAReset(struct ARMCore* cpu) {
182 ARMSetPrivilegeMode(cpu, MODE_IRQ);
183 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
184 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
185 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
186 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
187 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
188
189 struct GBA* gba = (struct GBA*) cpu->master;
190 if (!GBARRIsPlaying(gba->rr) && !GBARRIsRecording(gba->rr)) {
191 GBASavedataUnmask(&gba->memory.savedata);
192 }
193 GBAMemoryReset(gba);
194 GBAVideoReset(&gba->video);
195 GBAAudioReset(&gba->audio);
196 GBAIOInit(gba);
197}
198
199static void GBAProcessEvents(struct ARMCore* cpu) {
200 do {
201 struct GBA* gba = (struct GBA*) cpu->master;
202 int32_t cycles = cpu->cycles;
203 int32_t nextEvent = INT_MAX;
204 int32_t testEvent;
205
206 if (gba->springIRQ) {
207 ARMRaiseIRQ(cpu);
208 gba->springIRQ = 0;
209 }
210
211 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
212 if (testEvent < nextEvent) {
213 nextEvent = testEvent;
214 }
215
216 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
217 if (testEvent < nextEvent) {
218 nextEvent = testEvent;
219 }
220
221 testEvent = GBATimersProcessEvents(gba, cycles);
222 if (testEvent < nextEvent) {
223 nextEvent = testEvent;
224 }
225
226 testEvent = GBAMemoryRunDMAs(gba, cycles);
227 if (testEvent < nextEvent) {
228 nextEvent = testEvent;
229 }
230
231 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
232 if (testEvent < nextEvent) {
233 nextEvent = testEvent;
234 }
235
236 cpu->cycles -= cycles;
237 cpu->nextEvent = nextEvent;
238
239 if (cpu->halted) {
240 cpu->cycles = cpu->nextEvent;
241 }
242 } while (cpu->cycles >= cpu->nextEvent);
243}
244
245static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
246 int32_t nextEvent = INT_MAX;
247 if (gba->timersEnabled) {
248 struct GBATimer* timer;
249 struct GBATimer* nextTimer;
250
251 timer = &gba->timers[0];
252 if (timer->enable) {
253 timer->nextEvent -= cycles;
254 timer->lastEvent -= cycles;
255 if (timer->nextEvent <= 0) {
256 timer->lastEvent = timer->nextEvent;
257 timer->nextEvent += timer->overflowInterval;
258 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
259 timer->oldReload = timer->reload;
260
261 if (timer->doIrq) {
262 GBARaiseIRQ(gba, IRQ_TIMER0);
263 }
264
265 if (gba->audio.enable) {
266 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
267 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
268 }
269
270 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
271 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
272 }
273 }
274
275 nextTimer = &gba->timers[1];
276 if (nextTimer->countUp) {
277 ++gba->memory.io[REG_TM1CNT_LO >> 1];
278 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
279 nextTimer->nextEvent = 0;
280 }
281 }
282 }
283 nextEvent = timer->nextEvent;
284 }
285
286 timer = &gba->timers[1];
287 if (timer->enable) {
288 timer->nextEvent -= cycles;
289 timer->lastEvent -= cycles;
290 if (timer->nextEvent <= 0) {
291 timer->lastEvent = timer->nextEvent;
292 timer->nextEvent += timer->overflowInterval;
293 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
294 timer->oldReload = timer->reload;
295
296 if (timer->doIrq) {
297 GBARaiseIRQ(gba, IRQ_TIMER1);
298 }
299
300 if (gba->audio.enable) {
301 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
302 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
303 }
304
305 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
306 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
307 }
308 }
309
310 if (timer->countUp) {
311 timer->nextEvent = INT_MAX;
312 }
313
314 nextTimer = &gba->timers[2];
315 if (nextTimer->countUp) {
316 ++gba->memory.io[REG_TM2CNT_LO >> 1];
317 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
318 nextTimer->nextEvent = 0;
319 }
320 }
321 }
322 if (timer->nextEvent < nextEvent) {
323 nextEvent = timer->nextEvent;
324 }
325 }
326
327 timer = &gba->timers[2];
328 if (timer->enable) {
329 timer->nextEvent -= cycles;
330 timer->lastEvent -= cycles;
331 nextEvent = timer->nextEvent;
332 if (timer->nextEvent <= 0) {
333 timer->lastEvent = timer->nextEvent;
334 timer->nextEvent += timer->overflowInterval;
335 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
336 timer->oldReload = timer->reload;
337
338 if (timer->doIrq) {
339 GBARaiseIRQ(gba, IRQ_TIMER2);
340 }
341
342 if (timer->countUp) {
343 timer->nextEvent = INT_MAX;
344 }
345
346 nextTimer = &gba->timers[3];
347 if (nextTimer->countUp) {
348 ++gba->memory.io[REG_TM3CNT_LO >> 1];
349 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
350 nextTimer->nextEvent = 0;
351 }
352 }
353 }
354 if (timer->nextEvent < nextEvent) {
355 nextEvent = timer->nextEvent;
356 }
357 }
358
359 timer = &gba->timers[3];
360 if (timer->enable) {
361 timer->nextEvent -= cycles;
362 timer->lastEvent -= cycles;
363 nextEvent = timer->nextEvent;
364 if (timer->nextEvent <= 0) {
365 timer->lastEvent = timer->nextEvent;
366 timer->nextEvent += timer->overflowInterval;
367 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
368 timer->oldReload = timer->reload;
369
370 if (timer->doIrq) {
371 GBARaiseIRQ(gba, IRQ_TIMER3);
372 }
373
374 if (timer->countUp) {
375 timer->nextEvent = INT_MAX;
376 }
377 }
378 if (timer->nextEvent < nextEvent) {
379 nextEvent = timer->nextEvent;
380 }
381 }
382 }
383 return nextEvent;
384}
385
386void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
387 gba->debugger = debugger;
388}
389
390void GBADetachDebugger(struct GBA* gba) {
391 gba->debugger = 0;
392}
393
394void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
395 gba->romVf = vf;
396 gba->pristineRomSize = vf->seek(vf, 0, SEEK_END);
397 vf->seek(vf, 0, SEEK_SET);
398 gba->pristineRom = vf->map(vf, SIZE_CART0, MAP_READ);
399 gba->memory.rom = gba->pristineRom;
400 gba->activeFile = fname;
401 gba->memory.romSize = gba->pristineRomSize;
402 gba->romCrc32 = crc32(gba->memory.rom, gba->memory.romSize);
403 GBASavedataInit(&gba->memory.savedata, sav);
404 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
405 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
406 // TODO: error check
407}
408
409void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
410 gba->biosVf = vf;
411 gba->memory.bios = vf->map(vf, SIZE_BIOS, MAP_READ);
412 gba->memory.fullBios = 1;
413 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
414 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
415 if (checksum == GBA_BIOS_CHECKSUM) {
416 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
417 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
418 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
419 } else {
420 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
421 }
422 gba->biosChecksum = checksum;
423 if ((gba->cpu->gprs[ARM_PC] >> BASE_OFFSET) == BASE_BIOS) {
424 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
425 }
426 // TODO: error check
427}
428
429void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
430 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
431 if (!patchedSize) {
432 return;
433 }
434 gba->memory.rom = anonymousMemoryMap(patchedSize);
435 memcpy(gba->memory.rom, gba->pristineRom, gba->memory.romSize > patchedSize ? patchedSize : gba->memory.romSize);
436 if (!patch->applyPatch(patch, gba->memory.rom, patchedSize)) {
437 mappedMemoryFree(gba->memory.rom, patchedSize);
438 gba->memory.rom = gba->pristineRom;
439 return;
440 }
441 gba->memory.romSize = patchedSize;
442 gba->romCrc32 = crc32(gba->memory.rom, gba->memory.romSize);
443}
444
445void GBATimerUpdateRegister(struct GBA* gba, int timer) {
446 struct GBATimer* currentTimer = &gba->timers[timer];
447 if (currentTimer->enable && !currentTimer->countUp) {
448 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
449 }
450}
451
452void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
453 gba->timers[timer].reload = reload;
454}
455
456void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
457 struct GBATimer* currentTimer = &gba->timers[timer];
458 GBATimerUpdateRegister(gba, timer);
459
460 int oldPrescale = currentTimer->prescaleBits;
461 switch (control & 0x0003) {
462 case 0x0000:
463 currentTimer->prescaleBits = 0;
464 break;
465 case 0x0001:
466 currentTimer->prescaleBits = 6;
467 break;
468 case 0x0002:
469 currentTimer->prescaleBits = 8;
470 break;
471 case 0x0003:
472 currentTimer->prescaleBits = 10;
473 break;
474 }
475 currentTimer->countUp = !!(control & 0x0004);
476 currentTimer->doIrq = !!(control & 0x0040);
477 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
478 int wasEnabled = currentTimer->enable;
479 currentTimer->enable = !!(control & 0x0080);
480 if (!wasEnabled && currentTimer->enable) {
481 if (!currentTimer->countUp) {
482 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
483 } else {
484 currentTimer->nextEvent = INT_MAX;
485 }
486 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
487 currentTimer->oldReload = currentTimer->reload;
488 currentTimer->lastEvent = 0;
489 gba->timersEnabled |= 1 << timer;
490 } else if (wasEnabled && !currentTimer->enable) {
491 if (!currentTimer->countUp) {
492 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
493 }
494 gba->timersEnabled &= ~(1 << timer);
495 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
496 // FIXME: this might be before present
497 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
498 }
499
500 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
501 gba->cpu->nextEvent = currentTimer->nextEvent;
502 }
503};
504
505void GBAWriteIE(struct GBA* gba, uint16_t value) {
506 if (value & (1 << IRQ_KEYPAD)) {
507 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
508 }
509
510 if (value & (1 << IRQ_GAMEPAK)) {
511 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
512 }
513
514 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
515 ARMRaiseIRQ(gba->cpu);
516 }
517}
518
519void GBAWriteIME(struct GBA* gba, uint16_t value) {
520 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
521 ARMRaiseIRQ(gba->cpu);
522 }
523}
524
525void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
526 gba->memory.io[REG_IF >> 1] |= 1 << irq;
527 gba->cpu->halted = 0;
528
529 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
530 ARMRaiseIRQ(gba->cpu);
531 }
532}
533
534void GBATestIRQ(struct ARMCore* cpu) {
535 struct GBA* gba = (struct GBA*) cpu->master;
536 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
537 gba->springIRQ = 1;
538 gba->cpu->nextEvent = 0;
539 }
540}
541
542void GBAHalt(struct GBA* gba) {
543 gba->cpu->nextEvent = 0;
544 gba->cpu->halted = 1;
545}
546
547static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
548 struct GBAThread* threadContext = GBAThreadGetContext();
549 if (threadContext) {
550 if (!gba) {
551 gba = threadContext->gba;
552 }
553 if (threadContext->logHandler) {
554 threadContext->logHandler(threadContext, level, format, args);
555 return;
556 }
557 }
558
559 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
560 return;
561 }
562
563 vprintf(format, args);
564 printf("\n");
565
566 if (level == GBA_LOG_FATAL) {
567 abort();
568 }
569}
570
571void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
572 va_list args;
573 va_start(args, format);
574 _GBAVLog(gba, level, format, args);
575 va_end(args);
576}
577
578void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
579 struct GBA* gba = 0;
580 if (debugger->cpu) {
581 gba = (struct GBA*) debugger->cpu->master;
582 }
583
584 enum GBALogLevel gbaLevel;
585 switch (level) {
586 default: // Avoids compiler warning
587 case DEBUGGER_LOG_DEBUG:
588 gbaLevel = GBA_LOG_DEBUG;
589 break;
590 case DEBUGGER_LOG_INFO:
591 gbaLevel = GBA_LOG_INFO;
592 break;
593 case DEBUGGER_LOG_WARN:
594 gbaLevel = GBA_LOG_WARN;
595 break;
596 case DEBUGGER_LOG_ERROR:
597 gbaLevel = GBA_LOG_ERROR;
598 break;
599 }
600 va_list args;
601 va_start(args, format);
602 _GBAVLog(gba, gbaLevel, format, args);
603 va_end(args);
604}
605
606bool GBAIsROM(struct VFile* vf) {
607 if (vf->seek(vf, 4, SEEK_SET) < 0) {
608 return false;
609 }
610 uint64_t signature;
611 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
612 return false;
613 }
614 return signature == GBA_ROM_MAGIC;
615}
616
617void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
618 struct GBA* gba = (struct GBA*) cpu->master;
619 enum GBALogLevel level = GBA_LOG_FATAL;
620 if (gba->debugger) {
621 level = GBA_LOG_STUB;
622 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
623 }
624 GBALog(gba, level, "Stub opcode: %08x", opcode);
625}
626
627void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
628 struct GBA* gba = (struct GBA*) cpu->master;
629 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
630 if (gba->debugger) {
631 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
632 }
633}
634
635void _checkOverrides(struct GBA* gba, uint32_t id) {
636 int i;
637 gba->busyLoop = -1;
638 for (i = 0; _overrides[i].id[0]; ++i) {
639 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
640 if (*overrideId == id) {
641 switch (_overrides[i].type) {
642 case SAVEDATA_FLASH512:
643 case SAVEDATA_FLASH1M:
644 gba->memory.savedata.type = _overrides[i].type;
645 GBASavedataInitFlash(&gba->memory.savedata);
646 break;
647 case SAVEDATA_EEPROM:
648 GBASavedataInitEEPROM(&gba->memory.savedata);
649 break;
650 case SAVEDATA_SRAM:
651 GBASavedataInitSRAM(&gba->memory.savedata);
652 break;
653 case SAVEDATA_NONE:
654 break;
655 }
656
657 if (_overrides[i].gpio & GPIO_RTC) {
658 GBAGPIOInitRTC(&gba->memory.gpio);
659 }
660
661 if (_overrides[i].gpio & GPIO_GYRO) {
662 GBAGPIOInitGyro(&gba->memory.gpio);
663 }
664
665 if (_overrides[i].gpio & GPIO_RUMBLE) {
666 GBAGPIOInitRumble(&gba->memory.gpio);
667 }
668
669 gba->busyLoop = _overrides[i].busyLoop;
670 return;
671 }
672 }
673}