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/memory.h"
10#include "util/patch.h"
11#include "util/vfs.h"
12
13const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
14const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
15
16static const uint64_t GBA_ROM_MAGIC = 0x21A29A6951AEFF24;
17
18enum {
19 SP_BASE_SYSTEM = 0x03FFFF00,
20 SP_BASE_IRQ = 0x03FFFFA0,
21 SP_BASE_SUPERVISOR = 0x03FFFFE0
22};
23
24struct GBACartridgeOverride {
25 const char id[4];
26 enum SavedataType type;
27 int gpio;
28};
29
30static const struct GBACartridgeOverride _overrides[] = {
31 // Boktai: The Sun is in Your Hand
32 { "U3IE", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
33 { "U3IP", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
34
35 // Boktai 2: Solar Boy Django
36 { "U32E", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
37 { "U32P", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
38
39 // Drill Dozer
40 { "V49J", SAVEDATA_SRAM, GPIO_RUMBLE },
41 { "V49E", SAVEDATA_SRAM, GPIO_RUMBLE },
42
43 // Pokemon Ruby
44 { "AXVJ", SAVEDATA_FLASH1M, GPIO_RTC },
45 { "AXVE", SAVEDATA_FLASH1M, GPIO_RTC },
46 { "AXVP", SAVEDATA_FLASH1M, GPIO_RTC },
47 { "AXVI", SAVEDATA_FLASH1M, GPIO_RTC },
48 { "AXVS", SAVEDATA_FLASH1M, GPIO_RTC },
49 { "AXVD", SAVEDATA_FLASH1M, GPIO_RTC },
50 { "AXVF", SAVEDATA_FLASH1M, GPIO_RTC },
51
52 // Pokemon Sapphire
53 { "AXPJ", SAVEDATA_FLASH1M, GPIO_RTC },
54 { "AXPE", SAVEDATA_FLASH1M, GPIO_RTC },
55 { "AXPP", SAVEDATA_FLASH1M, GPIO_RTC },
56 { "AXPI", SAVEDATA_FLASH1M, GPIO_RTC },
57 { "AXPS", SAVEDATA_FLASH1M, GPIO_RTC },
58 { "AXPD", SAVEDATA_FLASH1M, GPIO_RTC },
59 { "AXPF", SAVEDATA_FLASH1M, GPIO_RTC },
60
61 // Pokemon Emerald
62 { "BPEJ", SAVEDATA_FLASH1M, GPIO_RTC },
63 { "BPEE", SAVEDATA_FLASH1M, GPIO_RTC },
64 { "BPEP", SAVEDATA_FLASH1M, GPIO_RTC },
65 { "BPEI", SAVEDATA_FLASH1M, GPIO_RTC },
66 { "BPES", SAVEDATA_FLASH1M, GPIO_RTC },
67 { "BPED", SAVEDATA_FLASH1M, GPIO_RTC },
68 { "BPEF", SAVEDATA_FLASH1M, GPIO_RTC },
69
70 // Pokemon FireRed
71 { "BPRJ", SAVEDATA_FLASH1M, GPIO_NONE },
72 { "BPRE", SAVEDATA_FLASH1M, GPIO_NONE },
73 { "BPRP", SAVEDATA_FLASH1M, GPIO_NONE },
74
75 // Pokemon LeafGreen
76 { "BPGJ", SAVEDATA_FLASH1M, GPIO_NONE },
77 { "BPGE", SAVEDATA_FLASH1M, GPIO_NONE },
78 { "BPGP", SAVEDATA_FLASH1M, GPIO_NONE },
79
80 // RockMan EXE 4.5 - Real Operation
81 { "BR4J", SAVEDATA_FLASH512, GPIO_RTC },
82
83 // Super Mario Advance 4
84 { "AX4J", SAVEDATA_FLASH1M, GPIO_NONE },
85 { "AX4E", SAVEDATA_FLASH1M, GPIO_NONE },
86 { "AX4P", SAVEDATA_FLASH1M, GPIO_NONE },
87
88 // Wario Ware Twisted
89 { "RWZJ", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
90 { "RWZE", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
91 { "RWZP", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
92
93 { { 0, 0, 0, 0 }, 0, 0 }
94};
95
96static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
97static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
98static void GBAProcessEvents(struct ARMCore* cpu);
99static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
100static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
101static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
102
103static void _checkOverrides(struct GBA* gba, uint32_t code);
104
105void GBACreate(struct GBA* gba) {
106 gba->d.id = GBA_COMPONENT_MAGIC;
107 gba->d.init = GBAInit;
108 gba->d.deinit = 0;
109}
110
111static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
112 struct GBA* gba = (struct GBA*) component;
113 gba->cpu = cpu;
114 gba->debugger = 0;
115
116 GBAInterruptHandlerInit(&cpu->irqh);
117 GBAMemoryInit(gba);
118
119 gba->video.p = gba;
120 GBAVideoInit(&gba->video);
121
122 gba->audio.p = gba;
123 GBAAudioInit(&gba->audio);
124
125 GBAIOInit(gba);
126
127 gba->sio.p = gba;
128 GBASIOInit(&gba->sio);
129
130 gba->timersEnabled = 0;
131 memset(gba->timers, 0, sizeof(gba->timers));
132
133 gba->springIRQ = 0;
134 gba->keySource = 0;
135 gba->rotationSource = 0;
136 gba->rumble = 0;
137
138 gba->romVf = 0;
139 gba->biosVf = 0;
140
141 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
142
143 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
144}
145
146void GBADestroy(struct GBA* gba) {
147 if (gba->pristineRom == gba->memory.rom) {
148 gba->memory.rom = 0;
149 }
150
151 if (gba->romVf) {
152 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
153 }
154
155 if (gba->biosVf) {
156 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
157 }
158
159 GBAMemoryDeinit(gba);
160 GBAVideoDeinit(&gba->video);
161 GBAAudioDeinit(&gba->audio);
162 GBARRContextDestroy(gba);
163}
164
165void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
166 irqh->reset = GBAReset;
167 irqh->processEvents = GBAProcessEvents;
168 irqh->swi16 = GBASwi16;
169 irqh->swi32 = GBASwi32;
170 irqh->hitIllegal = GBAIllegal;
171 irqh->readCPSR = GBATestIRQ;
172 irqh->hitStub = GBAHitStub;
173}
174
175void GBAReset(struct ARMCore* cpu) {
176 ARMSetPrivilegeMode(cpu, MODE_IRQ);
177 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
178 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
179 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
180 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
181 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
182
183 struct GBA* gba = (struct GBA*) cpu->master;
184 GBAMemoryReset(gba);
185 GBAVideoReset(&gba->video);
186 GBAAudioReset(&gba->audio);
187 GBAIOInit(gba);
188}
189
190static void GBAProcessEvents(struct ARMCore* cpu) {
191 do {
192 struct GBA* gba = (struct GBA*) cpu->master;
193 int32_t cycles = cpu->cycles;
194 int32_t nextEvent = INT_MAX;
195 int32_t testEvent;
196
197 if (gba->springIRQ) {
198 ARMRaiseIRQ(cpu);
199 gba->springIRQ = 0;
200 }
201
202 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
203 if (testEvent < nextEvent) {
204 nextEvent = testEvent;
205 }
206
207 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
208 if (testEvent < nextEvent) {
209 nextEvent = testEvent;
210 }
211
212 testEvent = GBATimersProcessEvents(gba, cycles);
213 if (testEvent < nextEvent) {
214 nextEvent = testEvent;
215 }
216
217 testEvent = GBAMemoryRunDMAs(gba, cycles);
218 if (testEvent < nextEvent) {
219 nextEvent = testEvent;
220 }
221
222 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
223 if (testEvent < nextEvent) {
224 nextEvent = testEvent;
225 }
226
227 cpu->cycles -= cycles;
228 cpu->nextEvent = nextEvent;
229
230 if (cpu->halted) {
231 cpu->cycles = cpu->nextEvent;
232 }
233 } while (cpu->cycles >= cpu->nextEvent);
234}
235
236static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
237 int32_t nextEvent = INT_MAX;
238 if (gba->timersEnabled) {
239 struct GBATimer* timer;
240 struct GBATimer* nextTimer;
241
242 timer = &gba->timers[0];
243 if (timer->enable) {
244 timer->nextEvent -= cycles;
245 timer->lastEvent -= cycles;
246 if (timer->nextEvent <= 0) {
247 timer->lastEvent = timer->nextEvent;
248 timer->nextEvent += timer->overflowInterval;
249 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
250 timer->oldReload = timer->reload;
251
252 if (timer->doIrq) {
253 GBARaiseIRQ(gba, IRQ_TIMER0);
254 }
255
256 if (gba->audio.enable) {
257 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
258 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
259 }
260
261 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
262 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
263 }
264 }
265
266 nextTimer = &gba->timers[1];
267 if (nextTimer->countUp) {
268 ++gba->memory.io[REG_TM1CNT_LO >> 1];
269 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
270 nextTimer->nextEvent = 0;
271 }
272 }
273 }
274 nextEvent = timer->nextEvent;
275 }
276
277 timer = &gba->timers[1];
278 if (timer->enable) {
279 timer->nextEvent -= cycles;
280 timer->lastEvent -= cycles;
281 if (timer->nextEvent <= 0) {
282 timer->lastEvent = timer->nextEvent;
283 timer->nextEvent += timer->overflowInterval;
284 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
285 timer->oldReload = timer->reload;
286
287 if (timer->doIrq) {
288 GBARaiseIRQ(gba, IRQ_TIMER1);
289 }
290
291 if (gba->audio.enable) {
292 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
293 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
294 }
295
296 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
297 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
298 }
299 }
300
301 if (timer->countUp) {
302 timer->nextEvent = INT_MAX;
303 }
304
305 nextTimer = &gba->timers[2];
306 if (nextTimer->countUp) {
307 ++gba->memory.io[REG_TM2CNT_LO >> 1];
308 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
309 nextTimer->nextEvent = 0;
310 }
311 }
312 }
313 if (timer->nextEvent < nextEvent) {
314 nextEvent = timer->nextEvent;
315 }
316 }
317
318 timer = &gba->timers[2];
319 if (timer->enable) {
320 timer->nextEvent -= cycles;
321 timer->lastEvent -= cycles;
322 nextEvent = timer->nextEvent;
323 if (timer->nextEvent <= 0) {
324 timer->lastEvent = timer->nextEvent;
325 timer->nextEvent += timer->overflowInterval;
326 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
327 timer->oldReload = timer->reload;
328
329 if (timer->doIrq) {
330 GBARaiseIRQ(gba, IRQ_TIMER2);
331 }
332
333 if (timer->countUp) {
334 timer->nextEvent = INT_MAX;
335 }
336
337 nextTimer = &gba->timers[3];
338 if (nextTimer->countUp) {
339 ++gba->memory.io[REG_TM3CNT_LO >> 1];
340 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
341 nextTimer->nextEvent = 0;
342 }
343 }
344 }
345 if (timer->nextEvent < nextEvent) {
346 nextEvent = timer->nextEvent;
347 }
348 }
349
350 timer = &gba->timers[3];
351 if (timer->enable) {
352 timer->nextEvent -= cycles;
353 timer->lastEvent -= cycles;
354 nextEvent = timer->nextEvent;
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 gba->debugger = debugger;
379}
380
381void GBADetachDebugger(struct GBA* gba) {
382 gba->debugger = 0;
383}
384
385void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
386 gba->romVf = vf;
387 gba->pristineRomSize = vf->seek(vf, 0, SEEK_END);
388 vf->seek(vf, 0, SEEK_SET);
389 gba->pristineRom = vf->map(vf, SIZE_CART0, MEMORY_READ);
390 gba->memory.rom = gba->pristineRom;
391 gba->activeFile = fname;
392 gba->memory.romSize = gba->pristineRomSize;
393 GBASavedataInit(&gba->memory.savedata, sav);
394 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
395 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
396 // TODO: error check
397}
398
399void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
400 gba->biosVf = vf;
401 gba->memory.bios = vf->map(vf, SIZE_BIOS, MEMORY_READ);
402 gba->memory.fullBios = 1;
403 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
404 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
405 if (checksum == GBA_BIOS_CHECKSUM) {
406 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
407 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
408 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
409 } else {
410 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
411 }
412 gba->biosChecksum = checksum;
413 if ((gba->cpu->gprs[ARM_PC] >> BASE_OFFSET) == BASE_BIOS) {
414 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
415 }
416 // TODO: error check
417}
418
419void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
420 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
421 if (!patchedSize) {
422 return;
423 }
424 gba->memory.rom = anonymousMemoryMap(patchedSize);
425 memcpy(gba->memory.rom, gba->pristineRom, gba->memory.romSize > patchedSize ? patchedSize : gba->memory.romSize);
426 if (!patch->applyPatch(patch, gba->memory.rom, patchedSize)) {
427 mappedMemoryFree(gba->memory.rom, patchedSize);
428 gba->memory.rom = gba->pristineRom;
429 return;
430 }
431 gba->memory.romSize = patchedSize;
432}
433
434void GBATimerUpdateRegister(struct GBA* gba, int timer) {
435 struct GBATimer* currentTimer = &gba->timers[timer];
436 if (currentTimer->enable && !currentTimer->countUp) {
437 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
438 }
439}
440
441void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
442 gba->timers[timer].reload = reload;
443}
444
445void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
446 struct GBATimer* currentTimer = &gba->timers[timer];
447 GBATimerUpdateRegister(gba, timer);
448
449 int oldPrescale = currentTimer->prescaleBits;
450 switch (control & 0x0003) {
451 case 0x0000:
452 currentTimer->prescaleBits = 0;
453 break;
454 case 0x0001:
455 currentTimer->prescaleBits = 6;
456 break;
457 case 0x0002:
458 currentTimer->prescaleBits = 8;
459 break;
460 case 0x0003:
461 currentTimer->prescaleBits = 10;
462 break;
463 }
464 currentTimer->countUp = !!(control & 0x0004);
465 currentTimer->doIrq = !!(control & 0x0040);
466 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
467 int wasEnabled = currentTimer->enable;
468 currentTimer->enable = !!(control & 0x0080);
469 if (!wasEnabled && currentTimer->enable) {
470 if (!currentTimer->countUp) {
471 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
472 } else {
473 currentTimer->nextEvent = INT_MAX;
474 }
475 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
476 currentTimer->oldReload = currentTimer->reload;
477 currentTimer->lastEvent = 0;
478 gba->timersEnabled |= 1 << timer;
479 } else if (wasEnabled && !currentTimer->enable) {
480 if (!currentTimer->countUp) {
481 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
482 }
483 gba->timersEnabled &= ~(1 << timer);
484 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
485 // FIXME: this might be before present
486 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
487 }
488
489 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
490 gba->cpu->nextEvent = currentTimer->nextEvent;
491 }
492};
493
494void GBAWriteIE(struct GBA* gba, uint16_t value) {
495 if (value & (1 << IRQ_KEYPAD)) {
496 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
497 }
498
499 if (value & (1 << IRQ_GAMEPAK)) {
500 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
501 }
502
503 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
504 ARMRaiseIRQ(gba->cpu);
505 }
506}
507
508void GBAWriteIME(struct GBA* gba, uint16_t value) {
509 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
510 ARMRaiseIRQ(gba->cpu);
511 }
512}
513
514void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
515 gba->memory.io[REG_IF >> 1] |= 1 << irq;
516 gba->cpu->halted = 0;
517
518 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
519 ARMRaiseIRQ(gba->cpu);
520 }
521}
522
523void GBATestIRQ(struct ARMCore* cpu) {
524 struct GBA* gba = (struct GBA*) cpu->master;
525 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
526 gba->springIRQ = 1;
527 gba->cpu->nextEvent = 0;
528 }
529}
530
531void GBAHalt(struct GBA* gba) {
532 gba->cpu->nextEvent = 0;
533 gba->cpu->halted = 1;
534}
535
536static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
537 if (!gba) {
538 struct GBAThread* threadContext = GBAThreadGetContext();
539 if (threadContext) {
540 gba = threadContext->gba;
541 }
542 }
543
544 if (gba && gba->logHandler) {
545 gba->logHandler(gba, level, format, args);
546 return;
547 }
548
549 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
550 return;
551 }
552
553 vprintf(format, args);
554 printf("\n");
555
556 if (level == GBA_LOG_FATAL) {
557 abort();
558 }
559}
560
561void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
562 va_list args;
563 va_start(args, format);
564 _GBAVLog(gba, level, format, args);
565 va_end(args);
566}
567
568void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
569 struct GBA* gba = 0;
570 if (debugger->cpu) {
571 gba = (struct GBA*) debugger->cpu->master;
572 }
573
574 enum GBALogLevel gbaLevel;
575 switch (level) {
576 case DEBUGGER_LOG_DEBUG:
577 gbaLevel = GBA_LOG_DEBUG;
578 break;
579 case DEBUGGER_LOG_INFO:
580 gbaLevel = GBA_LOG_INFO;
581 break;
582 case DEBUGGER_LOG_WARN:
583 gbaLevel = GBA_LOG_WARN;
584 break;
585 case DEBUGGER_LOG_ERROR:
586 gbaLevel = GBA_LOG_ERROR;
587 break;
588 }
589 va_list args;
590 va_start(args, format);
591 _GBAVLog(gba, gbaLevel, format, args);
592 va_end(args);
593}
594
595bool GBAIsROM(struct VFile* vf) {
596 if (vf->seek(vf, 4, SEEK_SET) < 0) {
597 return false;
598 }
599 uint64_t signature;
600 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
601 return false;
602 }
603 return signature == GBA_ROM_MAGIC;
604}
605
606void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
607 struct GBA* gba = (struct GBA*) cpu->master;
608 enum GBALogLevel level = GBA_LOG_FATAL;
609 if (gba->debugger) {
610 level = GBA_LOG_STUB;
611 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
612 }
613 GBALog(gba, level, "Stub opcode: %08x", opcode);
614}
615
616void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
617 struct GBA* gba = (struct GBA*) cpu->master;
618 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
619 if (gba->debugger) {
620 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
621 }
622}
623
624void _checkOverrides(struct GBA* gba, uint32_t id) {
625 int i;
626 for (i = 0; _overrides[i].id[0]; ++i) {
627 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
628 if (*overrideId == id) {
629 switch (_overrides[i].type) {
630 case SAVEDATA_FLASH512:
631 case SAVEDATA_FLASH1M:
632 gba->memory.savedata.type = _overrides[i].type;
633 GBASavedataInitFlash(&gba->memory.savedata);
634 break;
635 case SAVEDATA_EEPROM:
636 GBASavedataInitEEPROM(&gba->memory.savedata);
637 break;
638 case SAVEDATA_SRAM:
639 GBASavedataInitSRAM(&gba->memory.savedata);
640 break;
641 case SAVEDATA_NONE:
642 break;
643 }
644
645 if (_overrides[i].gpio & GPIO_RTC) {
646 GBAGPIOInitRTC(&gba->memory.gpio);
647 }
648
649 if (_overrides[i].gpio & GPIO_GYRO) {
650 GBAGPIOInitGyro(&gba->memory.gpio);
651 }
652
653 if (_overrides[i].gpio & GPIO_RUMBLE) {
654 GBAGPIOInitRumble(&gba->memory.gpio);
655 }
656 return;
657 }
658 }
659}