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};
30
31static const struct GBACartridgeOverride _overrides[] = {
32 // Boktai: The Sun is in Your Hand
33 { "U3IE", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
34 { "U3IP", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
35
36 // Boktai 2: Solar Boy Django
37 { "U32E", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
38 { "U32P", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
39
40 // Drill Dozer
41 { "V49J", SAVEDATA_SRAM, GPIO_RUMBLE },
42 { "V49E", SAVEDATA_SRAM, GPIO_RUMBLE },
43
44 // Pokemon Ruby
45 { "AXVJ", SAVEDATA_FLASH1M, GPIO_RTC },
46 { "AXVE", SAVEDATA_FLASH1M, GPIO_RTC },
47 { "AXVP", SAVEDATA_FLASH1M, GPIO_RTC },
48 { "AXVI", SAVEDATA_FLASH1M, GPIO_RTC },
49 { "AXVS", SAVEDATA_FLASH1M, GPIO_RTC },
50 { "AXVD", SAVEDATA_FLASH1M, GPIO_RTC },
51 { "AXVF", SAVEDATA_FLASH1M, GPIO_RTC },
52
53 // Pokemon Sapphire
54 { "AXPJ", SAVEDATA_FLASH1M, GPIO_RTC },
55 { "AXPE", SAVEDATA_FLASH1M, GPIO_RTC },
56 { "AXPP", SAVEDATA_FLASH1M, GPIO_RTC },
57 { "AXPI", SAVEDATA_FLASH1M, GPIO_RTC },
58 { "AXPS", SAVEDATA_FLASH1M, GPIO_RTC },
59 { "AXPD", SAVEDATA_FLASH1M, GPIO_RTC },
60 { "AXPF", SAVEDATA_FLASH1M, GPIO_RTC },
61
62 // Pokemon Emerald
63 { "BPEJ", SAVEDATA_FLASH1M, GPIO_RTC },
64 { "BPEE", SAVEDATA_FLASH1M, GPIO_RTC },
65 { "BPEP", SAVEDATA_FLASH1M, GPIO_RTC },
66 { "BPEI", SAVEDATA_FLASH1M, GPIO_RTC },
67 { "BPES", SAVEDATA_FLASH1M, GPIO_RTC },
68 { "BPED", SAVEDATA_FLASH1M, GPIO_RTC },
69 { "BPEF", SAVEDATA_FLASH1M, GPIO_RTC },
70
71 // Pokemon FireRed
72 { "BPRJ", SAVEDATA_FLASH1M, GPIO_NONE },
73 { "BPRE", SAVEDATA_FLASH1M, GPIO_NONE },
74 { "BPRP", SAVEDATA_FLASH1M, GPIO_NONE },
75
76 // Pokemon LeafGreen
77 { "BPGJ", SAVEDATA_FLASH1M, GPIO_NONE },
78 { "BPGE", SAVEDATA_FLASH1M, GPIO_NONE },
79 { "BPGP", SAVEDATA_FLASH1M, GPIO_NONE },
80
81 // RockMan EXE 4.5 - Real Operation
82 { "BR4J", SAVEDATA_FLASH512, GPIO_RTC },
83
84 // Super Mario Advance 4
85 { "AX4J", SAVEDATA_FLASH1M, GPIO_NONE },
86 { "AX4E", SAVEDATA_FLASH1M, GPIO_NONE },
87 { "AX4P", SAVEDATA_FLASH1M, GPIO_NONE },
88
89 // Wario Ware Twisted
90 { "RWZJ", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
91 { "RWZE", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
92 { "RWZP", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
93
94 { { 0, 0, 0, 0 }, 0, 0 }
95};
96
97static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
98static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
99static void GBAProcessEvents(struct ARMCore* cpu);
100static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
101static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
102static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
103
104static void _checkOverrides(struct GBA* gba, uint32_t code);
105
106void GBACreate(struct GBA* gba) {
107 gba->d.id = GBA_COMPONENT_MAGIC;
108 gba->d.init = GBAInit;
109 gba->d.deinit = 0;
110}
111
112static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
113 struct GBA* gba = (struct GBA*) component;
114 gba->cpu = cpu;
115 gba->debugger = 0;
116
117 GBAInterruptHandlerInit(&cpu->irqh);
118 GBAMemoryInit(gba);
119
120 gba->video.p = gba;
121 GBAVideoInit(&gba->video);
122
123 gba->audio.p = gba;
124 GBAAudioInit(&gba->audio);
125
126 GBAIOInit(gba);
127
128 gba->sio.p = gba;
129 GBASIOInit(&gba->sio);
130
131 gba->timersEnabled = 0;
132 memset(gba->timers, 0, sizeof(gba->timers));
133
134 gba->springIRQ = 0;
135 gba->keySource = 0;
136 gba->rotationSource = 0;
137 gba->rumble = 0;
138
139 gba->romVf = 0;
140 gba->biosVf = 0;
141
142 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
143
144 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
145}
146
147void GBADestroy(struct GBA* gba) {
148 if (gba->pristineRom == gba->memory.rom) {
149 gba->memory.rom = 0;
150 }
151
152 if (gba->romVf) {
153 gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
154 }
155
156 if (gba->biosVf) {
157 gba->biosVf->unmap(gba->biosVf, gba->memory.bios, SIZE_BIOS);
158 }
159
160 GBAMemoryDeinit(gba);
161 GBAVideoDeinit(&gba->video);
162 GBAAudioDeinit(&gba->audio);
163 GBARRContextDestroy(gba);
164}
165
166void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
167 irqh->reset = GBAReset;
168 irqh->processEvents = GBAProcessEvents;
169 irqh->swi16 = GBASwi16;
170 irqh->swi32 = GBASwi32;
171 irqh->hitIllegal = GBAIllegal;
172 irqh->readCPSR = GBATestIRQ;
173 irqh->hitStub = GBAHitStub;
174}
175
176void GBAReset(struct ARMCore* cpu) {
177 ARMSetPrivilegeMode(cpu, MODE_IRQ);
178 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
179 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
180 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
181 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
182 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
183
184 struct GBA* gba = (struct GBA*) cpu->master;
185 GBAMemoryReset(gba);
186 GBAVideoReset(&gba->video);
187 GBAAudioReset(&gba->audio);
188 GBAIOInit(gba);
189}
190
191static void GBAProcessEvents(struct ARMCore* cpu) {
192 do {
193 struct GBA* gba = (struct GBA*) cpu->master;
194 int32_t cycles = cpu->cycles;
195 int32_t nextEvent = INT_MAX;
196 int32_t testEvent;
197
198 if (gba->springIRQ) {
199 ARMRaiseIRQ(cpu);
200 gba->springIRQ = 0;
201 }
202
203 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
204 if (testEvent < nextEvent) {
205 nextEvent = testEvent;
206 }
207
208 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
209 if (testEvent < nextEvent) {
210 nextEvent = testEvent;
211 }
212
213 testEvent = GBATimersProcessEvents(gba, cycles);
214 if (testEvent < nextEvent) {
215 nextEvent = testEvent;
216 }
217
218 testEvent = GBAMemoryRunDMAs(gba, cycles);
219 if (testEvent < nextEvent) {
220 nextEvent = testEvent;
221 }
222
223 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
224 if (testEvent < nextEvent) {
225 nextEvent = testEvent;
226 }
227
228 cpu->cycles -= cycles;
229 cpu->nextEvent = nextEvent;
230
231 if (cpu->halted) {
232 cpu->cycles = cpu->nextEvent;
233 }
234 } while (cpu->cycles >= cpu->nextEvent);
235}
236
237static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
238 int32_t nextEvent = INT_MAX;
239 if (gba->timersEnabled) {
240 struct GBATimer* timer;
241 struct GBATimer* nextTimer;
242
243 timer = &gba->timers[0];
244 if (timer->enable) {
245 timer->nextEvent -= cycles;
246 timer->lastEvent -= cycles;
247 if (timer->nextEvent <= 0) {
248 timer->lastEvent = timer->nextEvent;
249 timer->nextEvent += timer->overflowInterval;
250 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
251 timer->oldReload = timer->reload;
252
253 if (timer->doIrq) {
254 GBARaiseIRQ(gba, IRQ_TIMER0);
255 }
256
257 if (gba->audio.enable) {
258 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
259 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
260 }
261
262 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
263 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
264 }
265 }
266
267 nextTimer = &gba->timers[1];
268 if (nextTimer->countUp) {
269 ++gba->memory.io[REG_TM1CNT_LO >> 1];
270 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
271 nextTimer->nextEvent = 0;
272 }
273 }
274 }
275 nextEvent = timer->nextEvent;
276 }
277
278 timer = &gba->timers[1];
279 if (timer->enable) {
280 timer->nextEvent -= cycles;
281 timer->lastEvent -= cycles;
282 if (timer->nextEvent <= 0) {
283 timer->lastEvent = timer->nextEvent;
284 timer->nextEvent += timer->overflowInterval;
285 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
286 timer->oldReload = timer->reload;
287
288 if (timer->doIrq) {
289 GBARaiseIRQ(gba, IRQ_TIMER1);
290 }
291
292 if (gba->audio.enable) {
293 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
294 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
295 }
296
297 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
298 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
299 }
300 }
301
302 if (timer->countUp) {
303 timer->nextEvent = INT_MAX;
304 }
305
306 nextTimer = &gba->timers[2];
307 if (nextTimer->countUp) {
308 ++gba->memory.io[REG_TM2CNT_LO >> 1];
309 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
310 nextTimer->nextEvent = 0;
311 }
312 }
313 }
314 if (timer->nextEvent < nextEvent) {
315 nextEvent = timer->nextEvent;
316 }
317 }
318
319 timer = &gba->timers[2];
320 if (timer->enable) {
321 timer->nextEvent -= cycles;
322 timer->lastEvent -= cycles;
323 nextEvent = timer->nextEvent;
324 if (timer->nextEvent <= 0) {
325 timer->lastEvent = timer->nextEvent;
326 timer->nextEvent += timer->overflowInterval;
327 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
328 timer->oldReload = timer->reload;
329
330 if (timer->doIrq) {
331 GBARaiseIRQ(gba, IRQ_TIMER2);
332 }
333
334 if (timer->countUp) {
335 timer->nextEvent = INT_MAX;
336 }
337
338 nextTimer = &gba->timers[3];
339 if (nextTimer->countUp) {
340 ++gba->memory.io[REG_TM3CNT_LO >> 1];
341 if (!gba->memory.io[REG_TM3CNT_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[3];
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_TM3CNT_LO >> 1] = timer->reload;
360 timer->oldReload = timer->reload;
361
362 if (timer->doIrq) {
363 GBARaiseIRQ(gba, IRQ_TIMER3);
364 }
365
366 if (timer->countUp) {
367 timer->nextEvent = INT_MAX;
368 }
369 }
370 if (timer->nextEvent < nextEvent) {
371 nextEvent = timer->nextEvent;
372 }
373 }
374 }
375 return nextEvent;
376}
377
378void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
379 gba->debugger = debugger;
380}
381
382void GBADetachDebugger(struct GBA* gba) {
383 gba->debugger = 0;
384}
385
386void GBALoadROM(struct GBA* gba, struct VFile* vf, struct VFile* sav, const char* fname) {
387 gba->romVf = vf;
388 gba->pristineRomSize = vf->seek(vf, 0, SEEK_END);
389 vf->seek(vf, 0, SEEK_SET);
390 gba->pristineRom = vf->map(vf, SIZE_CART0, MAP_READ);
391 gba->memory.rom = gba->pristineRom;
392 gba->activeFile = fname;
393 gba->memory.romSize = gba->pristineRomSize;
394 gba->romCrc32 = crc32(gba->memory.rom, gba->memory.romSize);
395 GBASavedataInit(&gba->memory.savedata, sav);
396 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
397 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
398 // TODO: error check
399}
400
401void GBALoadBIOS(struct GBA* gba, struct VFile* vf) {
402 gba->biosVf = vf;
403 gba->memory.bios = vf->map(vf, SIZE_BIOS, MAP_READ);
404 gba->memory.fullBios = 1;
405 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
406 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
407 if (checksum == GBA_BIOS_CHECKSUM) {
408 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
409 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
410 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
411 } else {
412 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
413 }
414 gba->biosChecksum = checksum;
415 if ((gba->cpu->gprs[ARM_PC] >> BASE_OFFSET) == BASE_BIOS) {
416 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
417 }
418 // TODO: error check
419}
420
421void GBAApplyPatch(struct GBA* gba, struct Patch* patch) {
422 size_t patchedSize = patch->outputSize(patch, gba->memory.romSize);
423 if (!patchedSize) {
424 return;
425 }
426 gba->memory.rom = anonymousMemoryMap(patchedSize);
427 memcpy(gba->memory.rom, gba->pristineRom, gba->memory.romSize > patchedSize ? patchedSize : gba->memory.romSize);
428 if (!patch->applyPatch(patch, gba->memory.rom, patchedSize)) {
429 mappedMemoryFree(gba->memory.rom, patchedSize);
430 gba->memory.rom = gba->pristineRom;
431 return;
432 }
433 gba->memory.romSize = patchedSize;
434 gba->romCrc32 = crc32(gba->memory.rom, gba->memory.romSize);
435}
436
437void GBATimerUpdateRegister(struct GBA* gba, int timer) {
438 struct GBATimer* currentTimer = &gba->timers[timer];
439 if (currentTimer->enable && !currentTimer->countUp) {
440 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
441 }
442}
443
444void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
445 gba->timers[timer].reload = reload;
446}
447
448void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
449 struct GBATimer* currentTimer = &gba->timers[timer];
450 GBATimerUpdateRegister(gba, timer);
451
452 int oldPrescale = currentTimer->prescaleBits;
453 switch (control & 0x0003) {
454 case 0x0000:
455 currentTimer->prescaleBits = 0;
456 break;
457 case 0x0001:
458 currentTimer->prescaleBits = 6;
459 break;
460 case 0x0002:
461 currentTimer->prescaleBits = 8;
462 break;
463 case 0x0003:
464 currentTimer->prescaleBits = 10;
465 break;
466 }
467 currentTimer->countUp = !!(control & 0x0004);
468 currentTimer->doIrq = !!(control & 0x0040);
469 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
470 int wasEnabled = currentTimer->enable;
471 currentTimer->enable = !!(control & 0x0080);
472 if (!wasEnabled && currentTimer->enable) {
473 if (!currentTimer->countUp) {
474 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
475 } else {
476 currentTimer->nextEvent = INT_MAX;
477 }
478 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
479 currentTimer->oldReload = currentTimer->reload;
480 currentTimer->lastEvent = 0;
481 gba->timersEnabled |= 1 << timer;
482 } else if (wasEnabled && !currentTimer->enable) {
483 if (!currentTimer->countUp) {
484 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
485 }
486 gba->timersEnabled &= ~(1 << timer);
487 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
488 // FIXME: this might be before present
489 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
490 }
491
492 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
493 gba->cpu->nextEvent = currentTimer->nextEvent;
494 }
495};
496
497void GBAWriteIE(struct GBA* gba, uint16_t value) {
498 if (value & (1 << IRQ_KEYPAD)) {
499 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
500 }
501
502 if (value & (1 << IRQ_GAMEPAK)) {
503 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
504 }
505
506 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
507 ARMRaiseIRQ(gba->cpu);
508 }
509}
510
511void GBAWriteIME(struct GBA* gba, uint16_t value) {
512 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
513 ARMRaiseIRQ(gba->cpu);
514 }
515}
516
517void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
518 gba->memory.io[REG_IF >> 1] |= 1 << irq;
519 gba->cpu->halted = 0;
520
521 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
522 ARMRaiseIRQ(gba->cpu);
523 }
524}
525
526void GBATestIRQ(struct ARMCore* cpu) {
527 struct GBA* gba = (struct GBA*) cpu->master;
528 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
529 gba->springIRQ = 1;
530 gba->cpu->nextEvent = 0;
531 }
532}
533
534void GBAHalt(struct GBA* gba) {
535 gba->cpu->nextEvent = 0;
536 gba->cpu->halted = 1;
537}
538
539static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
540 if (!gba) {
541 struct GBAThread* threadContext = GBAThreadGetContext();
542 if (threadContext) {
543 gba = threadContext->gba;
544 }
545 }
546
547 if (gba && gba->logHandler) {
548 gba->logHandler(gba, level, format, args);
549 return;
550 }
551
552 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
553 return;
554 }
555
556 vprintf(format, args);
557 printf("\n");
558
559 if (level == GBA_LOG_FATAL) {
560 abort();
561 }
562}
563
564void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
565 va_list args;
566 va_start(args, format);
567 _GBAVLog(gba, level, format, args);
568 va_end(args);
569}
570
571void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
572 struct GBA* gba = 0;
573 if (debugger->cpu) {
574 gba = (struct GBA*) debugger->cpu->master;
575 }
576
577 enum GBALogLevel gbaLevel;
578 switch (level) {
579 case DEBUGGER_LOG_DEBUG:
580 gbaLevel = GBA_LOG_DEBUG;
581 break;
582 case DEBUGGER_LOG_INFO:
583 gbaLevel = GBA_LOG_INFO;
584 break;
585 case DEBUGGER_LOG_WARN:
586 gbaLevel = GBA_LOG_WARN;
587 break;
588 case DEBUGGER_LOG_ERROR:
589 gbaLevel = GBA_LOG_ERROR;
590 break;
591 }
592 va_list args;
593 va_start(args, format);
594 _GBAVLog(gba, gbaLevel, format, args);
595 va_end(args);
596}
597
598bool GBAIsROM(struct VFile* vf) {
599 if (vf->seek(vf, 4, SEEK_SET) < 0) {
600 return false;
601 }
602 uint64_t signature;
603 if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
604 return false;
605 }
606 return signature == GBA_ROM_MAGIC;
607}
608
609void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
610 struct GBA* gba = (struct GBA*) cpu->master;
611 enum GBALogLevel level = GBA_LOG_FATAL;
612 if (gba->debugger) {
613 level = GBA_LOG_STUB;
614 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
615 }
616 GBALog(gba, level, "Stub opcode: %08x", opcode);
617}
618
619void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
620 struct GBA* gba = (struct GBA*) cpu->master;
621 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
622 if (gba->debugger) {
623 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
624 }
625}
626
627void _checkOverrides(struct GBA* gba, uint32_t id) {
628 int i;
629 for (i = 0; _overrides[i].id[0]; ++i) {
630 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
631 if (*overrideId == id) {
632 switch (_overrides[i].type) {
633 case SAVEDATA_FLASH512:
634 case SAVEDATA_FLASH1M:
635 gba->memory.savedata.type = _overrides[i].type;
636 GBASavedataInitFlash(&gba->memory.savedata);
637 break;
638 case SAVEDATA_EEPROM:
639 GBASavedataInitEEPROM(&gba->memory.savedata);
640 break;
641 case SAVEDATA_SRAM:
642 GBASavedataInitSRAM(&gba->memory.savedata);
643 break;
644 case SAVEDATA_NONE:
645 break;
646 }
647
648 if (_overrides[i].gpio & GPIO_RTC) {
649 GBAGPIOInitRTC(&gba->memory.gpio);
650 }
651
652 if (_overrides[i].gpio & GPIO_GYRO) {
653 GBAGPIOInitGyro(&gba->memory.gpio);
654 }
655
656 if (_overrides[i].gpio & GPIO_RUMBLE) {
657 GBAGPIOInitRumble(&gba->memory.gpio);
658 }
659 return;
660 }
661 }
662}